WO2009068227A1 - Device for closing plastic containers - Google Patents
Device for closing plastic containers Download PDFInfo
- Publication number
- WO2009068227A1 WO2009068227A1 PCT/EP2008/009893 EP2008009893W WO2009068227A1 WO 2009068227 A1 WO2009068227 A1 WO 2009068227A1 EP 2008009893 W EP2008009893 W EP 2008009893W WO 2009068227 A1 WO2009068227 A1 WO 2009068227A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- anvil
- ultrasonic
- holding device
- closed position
- ultrasonic vibrator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
- A61D19/00—Instruments or methods for reproduction or fertilisation
- A61D19/02—Instruments or methods for reproduction or fertilisation for artificial insemination
- A61D19/022—Containers for animal semen, e.g. pouches or vials ; Methods or apparatus for treating or handling animal semen containers, e.g. filling or closing
- A61D19/024—Tube-like containers, e.g. straws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/10—Closing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/326—Shaping the burr, e.g. by the joining tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/328—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect
- B29C66/3282—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect for reinforcing the joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
- B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
- B29C66/8414—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions of different diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/849—Packaging machines
- B29C66/8491—Packaging machines welding through a filled container, e.g. tube or bag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
- B65B51/225—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by ultrasonic welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/005—Hoses, i.e. flexible
- B29L2023/007—Medical tubes other than catheters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
Definitions
- the invention relates to an apparatus and a method for closing plastic containers and in particular for welding plastic tubes, which are suitable for Aufnahe of animal seeds, such as cattle or horses.
- sequins Animal semen of cattle or horses are usually in so-called sequins, i. Plastic tubes with a diameter of 1, 95 mm or 2.9 mm and a length of about 133 mm filled and stored the sequins after sealing in liquid nitrogen. In this way, animal semen can be stored for long periods without loss of quality.
- the sequins are usually sealed after filling with seminal fluid in automatic welding systems at least at one end.
- an apparatus for welding portions of material of a container, such as wall sections of a plastic tube by means of ultrasound comprising an anvil, an ultrasound transducer for delivering ultrasound and a holding device, the anvil being positioned relative to the ultrasonic viewer and the holding means between an open position and a closed position is movable so that in the closed position, two overlapping portions of material between the anvil and the ultrasonic vibrator and between the anvil and the holding means can be held and connected to each other under the action of ultrasound.
- the material sections of a tube for holding animal semen are not only held between an anvil and an ultrasonic vibrator and welded under the action of ultrasound and pressure, but the device according to the invention comprises, in addition to the ultrasonic oscillator, an additional cooperating with the anvil Holding device, which is structurally separated from the ultrasonic vibrator and from which no ultrasonic energy emanates.
- the sections of material to be welded are therefore held during welding not only between the anvil and the ultrasonic vibrator, but in addition between the anvil and the holding device. This has the advantage that the material sections to be welded are held at least at a point at which no direct entry of ultrasonic energy into the material sections takes place.
- the material sections are more accurately held in position with the anvil closed and are not affected by ultrasound generated vibrations, which leads to better reproducible results in terms of weld quality.
- the weld site can be symmetrical with the tube with high reproducibility, i. be made substantially on the axis of symmetry of the tube
- the ultrasonic vibrator and the holding device are arranged side by side, while the anvil and the ultrasonic vibrator and the anvil and the holding device in the closed position of the device are opposite.
- the anvil and the ultrasonic oscillator have at least one engagement surface, wherein the engagement surfaces are opposite in the closed position. Both engagement surfaces preferably have the same width and substantially the same size.
- the holding device is arranged next to the ultrasonic oscillator and arranged so that in the closed position, the material portions of a tube between the anvil and the ultrasonic transducer and the anvil and the holding device are held while the tube adjacent to the holding device and of the ultrasonic oscillator the holding device is separated, arranged.
- the tube and also the approximate material sections in the transition region during welding are substantially shielded from the ultrasound oscillations emanating from the ultrasonic vibrator and a negative effect of the ultrasound, such as the excitation of vibrations of the material sections, can be avoided.
- the distance between the anvil and the holding device is greater than the distance between the anvil and the ultrasonic vibrator or the distance between their engagement surfaces. If the holding device is arranged next to the ultrasonic vibrator, that it is close to the edge of the contacting material portions, it can be achieved that melted, due to the application of pressure between the anvil and the ultrasonic oscillator in the direction of the tube material flowing approximately at the Edge accumulates between the contacting between the anvil and the holding means material portions of the tube, so that the wall portions of the tube are reinforced at the edge by additional material.
- the holding device has an engagement surface which is arranged parallel to the engagement surface of the ultrasonic vibrator and is set back from this.
- molten material may accumulate in this region and contribute to strengthening the weld, particularly at the inner edge of the contacting material portions.
- the apparatus comprises means adapted and movable to move the space formed in the closed position between the opposing engagement surfaces of the anvil and the ultrasonic viewer and optionally between the opposed engagement surfaces of the anvil and the support means closes laterally at least on two opposite sides. This ensures that molten material of the wall sections at the end can not flow off to the side, but in the direction of the straight edge between the contacting wall sections at the front of the device, where it can contribute to a reinforcement of the weld.
- the anvil and the holding device each have a bevelled front surface that is inclined relative to the plane of the engagement surface of the anvil and the ultrasonic vibrator and in the closed position of the device form a funnel formed in between the surfaces the anvil and the holding device and the ultrasonic oscillator formed space opens.
- the anvil and the ultrasonic oscillator and the holding device each have a plurality of juxtaposed surfaces for the simultaneous welding of a plurality of containers or tubes.
- the areas may differ have sizes so that containers or tubes of different sizes can be welded with one and the same device.
- a method for welding sections with a device having the features described above comprises the steps of disposing two overlapping portions of material on the ultrasonic transducer and the support, moving the anvil to the ultrasonic transducer, and the support so that the portions engage and engage the engagement surfaces of the anvil, the ultrasonic vibrator, and the support and introducing ultrasound energy from the ultrasonic transducer into the material sections so that they weld together.
- a movement, in particular a parallel movement of the ultrasonic oscillator and the holding device to the anvil can take place.
- only the relative movement between the anvil and the ultrasonic vibrator and the holding device is crucial for the welding process.
- the method according to the invention has the advantage that the material sections to be welded are merely held at at least one point between the anvil and the holding device, without any direct entry of ultrasonic energy into the material sections at this location.
- the wall sections can be better held in position and better reproducible welding can be achieved.
- the material sections are shaped by the bevelled front sides of the anvil and the holding device.
- the wall sections originally forming a cylindrical shape are approximated by the front sides, so that they finally touch along an edge at the front of the closed anvil.
- the welding of the sections takes place by simultaneously exerting pressure through the surfaces of the anvil and the ultrasonic vibrator and by introducing ultrasonic energy into the sections.
- the pressure on the one hand, the contact between the sections and the ultrasonic transducer is amplified, so that the ultrasonic energy can be registered more efficiently in the material sections.
- the molten material portions are bonded and welded together by the applied pressure.
- the introduction of ultrasonic energy from the ultrasonic transducer into the sections begins before the anvil reaches the final position and maximum pressure is applied to the sections.
- the method may, according to yet another embodiment, comprise the lateral closure of the space formed by the surfaces of the anvil and the ultrasonic vibrator.
- Fig. 1 shows schematically an arrangement of a seed tube in the inventive
- Fig. 2 is a perspective view of the device according to the invention according to a
- 6a and 6b show a chamber limiting device of the device according to the invention of the embodiment shown in FIG. 2;
- Fig. 7 shows the device according to the invention according to the embodiment shown in Fig. 2 in a sectional view
- the device according to the invention will now be described in accordance with an exemplary embodiment with reference to the figures.
- an apparatus for welding portions of material, in particular wall portions of a container, such as a tube 1 for receiving seminal fluid comprises an anvil 2 which is movable between an open and a closed position.
- the anvil 2 is pivotally mounted to the device.
- the device further comprises an ultrasonic transducer 3, such as a so-called sonotrode, which can be excited to oscillate at a frequency of, for example, 40 kHz.
- the device comprises a holding device 4, such as a counter-holder.
- the ultrasonic oscillator 3 and the holding device 4 are arranged directly next to one another.
- the anvil 2 is mounted on the device so that in a closed position of the device, as shown in Figures 1, 2 and 7, engaging surfaces 5 and 6 of the anvil and the ultrasonic vibrator 3 are opposite each other and substantially parallel to each other are oriented.
- the lateral distance between the holding device 4 and the ultrasound oscillator 3 is very small, for example, 10 .mu.m, 20 .mu.m or 50 .mu.m include.
- Between the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3 opposite wall portions 7 and 8 of the tube 1 can be maintained.
- the anvil 2 and the ultrasonic vibrator 3 are arranged in relation to each other so that the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3 in the closed position have a small distance from each other, such as 100 microns, 200 microns, 500 microns or 1 mm ,
- the engagement surface 5 of the anvil 2 further comprises a portion with a recessed relative to the engagement surface 5 surface 9. By this recessed surface 9 of the engagement surface 5 additional space between the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3 is obtained, which can serve to receive molten material of the material sections 7, 8 of the tube 1. As can be seen in FIGS.
- the holding device 4 is mounted between the ultrasonic vibrator 3 and a tube 1 arranged in the device on the device.
- the holding device 4 comprises an engagement surface 10, which is aligned parallel to the engagement surface 6 of the ultrasonic vibrator 3, but compared to the engagement surface 6 of the ultrasonic vibrator 3, for example, by 100 microns, 200 microns, 500 microns or 1 mm set back.
- the recessed engagement surface 10 is achieved that molten material of the wall portions 7, 8 of the tube 1 to the edge between the contacting wall sections 7, 8 flow into the interior of the tube and can accumulate there, so that a bead 11 is formed, which Welding between the wall sections 7, 8 reinforced.
- the engagement surface 10 as compared to a sharp edge, a lesser selective pressure on the wall portion 8 of the tube 1 is generated, so that the risk of tearing of the wall portion 8 and thus a leakage of the tube 1 is reduced.
- the anvil 2 and the holding device 4 each have beveled front surfaces 12, 13 which have an angle of 45 ° relative to the planes of the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3.
- the inclination angle shown here is only an example and other angles of inclination may be suitable.
- Other than the planar front surfaces shown here differently shaped ones such as e.g. curved front surfaces are used.
- the beveled front surfaces 12 and 13 serve as abutment surfaces for the wall sections 7, 8 of the tube 1 and for forming the transition from the cylindrical shape formed by the wall sections 7 and 8 of the tube 1 to the edge between the contacting wall sections 7, 8 at the end of the bevelled Front surfaces 12, 13.
- the wall sections 7 and 8 of the tube are held between the anvil 2 and the holding device 4 and the anvil and the ultrasonic oscillator 3. Since the holding device 4 is not excited to vibrate and is positioned between the tube and the ultrasonic vibrator, ultrasonic vibrations of the wall sections 7 and 8, in particular in the transition region between the cylindrical wall portions of the tube and touching the edge material portions are kept away, so that no Uncontrolled shifts or deformations of the material sections due to vibrations occur and more reproducible welding results can be achieved. Furthermore, will be Exposing the ultrasonic energy to a recorded in the tube 1 seminal fluid avoided.
- the anvil 2, the ultrasonic vibrator 3 and the holding device 4 comprise a plurality of identical engagement surfaces 5, 6 and 10 (for example 8) side by side.
- the engagement surfaces 5, 6 and 10 have a different width.
- several tubes 1 and also tubes 1 of different diameters can be welded simultaneously.
- the areas of the engagement surfaces of the anvil 3 and the ultrasonic vibrator 3 have a size of about 2 x 2 mm.
- the engagement surfaces of the holding device 4 may, for example, have an area of 2 ⁇ 0.5 mm.
- each recesses 15, 16 and 17 are provided, can engage in the teeth 18 of a chamber boundary 19.
- the teeth 18 of the chamber boundary 19 serve to laterally define the space defined between the engagement surfaces 5, 6 and 10 of the anvil 2, the ultrasonic vibrator 3 and the holding device 4, so that molten material of the wall sections 7, 8 only in the direction of the tube 1 or opposite thereto, but can not flow laterally out of the space defined by the engagement surfaces.
- the anvil 2, the ultrasonic vibrator 3, the retainer 4 and the chamber boundary 19 are mounted in the device on a frame 20, as shown in Fig. 2, wherein the anvil 2 and the chamber boundary 19 by means of (not shown in Figs ) Mechanism 'be kept pivotable.
- a tube 1 is arranged next to the engagement surfaces 10 and 6 of the holding device 4 or of the ultrasonic vibrator 3.
- the anvil is 2 pivoted in the open position and is thus removed from the holding device 4 and the ultrasonic transducer 3.
- the anvil 2 is pivoted in the direction of the holding device 4 and the ultrasonic vibrator 3, so that the engagement surfaces 5 of the anvil 2, the engagement surface 6 of the ultrasonic vibrator 3 and the engagement surface 10 of the holding device 4 brought into contact with the wall sections 7 and 8 of the tube 1 become.
- the wall sections 7 and 8 are approximated in the end region of the tube 1.
- the ultrasonic vibrator 3 is preferably ultrasonically vibrated by an ultrasonic generator (not shown) before the anvil 2 has reached its final closed position so as to introduce ultrasonic energy into the wall sections 7, 8 as soon as possible.
- the precise timing at which the ultrasonic vibrator is vibrated relative to the closing movement of the anvil 2 is variable and adjustable.
- the ultrasonic vibrator 3 is operated at a frequency of 40 kHz. However, this value is variable.
- the additional liquid material results in the formation of a bead 11 which results in an increase in the welding between the wall portions 7 and 8 at the front contact edge.
- the formation of the bead 11 is facilitated by the engagement surface 10 of the Holder device 4 is set back relative to the engagement surface 6 of the ultrasonic vibrator 3.
- the ultrasonic generator is switched off, so that the fused material of the wall sections 7, 8 can cool. Thereafter, the chamber boundary 19 is removed from the spaces in the engagement surfaces and the anvil 2 is pivoted away.
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- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Reproductive Health (AREA)
- Wood Science & Technology (AREA)
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Abstract
Description
Vorrichtung zum Verschließen von Kunststoffbehältern Device for closing plastic containers
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Verschließen von Kunststoffbehältern und insbesondere zum Verschweißen von Kunststoffröhrchen, die zur Aufnahe von Tiersamen, wie beispielsweise von Rindern oder Pferden geeignet sind.The invention relates to an apparatus and a method for closing plastic containers and in particular for welding plastic tubes, which are suitable for Aufnahe of animal seeds, such as cattle or horses.
Tiersamen von Rindern oder Pferden werden üblicherweise in sogenannten Pailletten, d.h. Kunststoffröhrchen mit einem Durchmesser von 1 , 95 mm oder 2,9 mm und einer Länge von etwa 133 mm abgefüllt und die Pailletten nach dem Verschließen in flüssigem Stickstoff aufbewahrt. Auf diese Weise können Tiersamen über lange Zeiträume ohne Qualitätsverluste gelagert werden. Die Pailletten werden nach dem Befüllen mit Samenflüssigkeit üblicherweise in automatischen Verschweißsystemen zumindest an einem Ende verschweißt.Animal semen of cattle or horses are usually in so-called sequins, i. Plastic tubes with a diameter of 1, 95 mm or 2.9 mm and a length of about 133 mm filled and stored the sequins after sealing in liquid nitrogen. In this way, animal semen can be stored for long periods without loss of quality. The sequins are usually sealed after filling with seminal fluid in automatic welding systems at least at one end.
Bei einem bekannten Verschweißsystem werden die Endabschnitte eines Röhrchens für Tiersamen zwischen einem schwenkbaren Amboß und einem gegenüber angeordneten Ultraschallschwinger gehalten und durch Ultraschall vom Ultraschallschwinger verschweißt. Mit dem bekannten Verschweißsystem können verschweißte Pailletten mit hohem Durchsatz und von den Anwendern tolerierbarer Fehlerrate hergestellt werden. Es wurde jedoch festgestellt, daß fehlerhafte Pailletten häufig auf Undichtigkeiten an der Verschweißungsstelle zurückzuführen sind. Undichtigkeiten können insbesondere durch die Einwirkung des Ultraschalls auf die unter Spannung stehenden Wandabschnitte des Röhrchens im Übergangsbereich zwischen den zylinderförmigen Wandabschnitten des Röhrchens und den zwischen dem Amboß und dem Ultraschallschwinger eingespannten, flach aufeinander liegenden Wandabschnitten des Röhrchens beim Verschweißen auftreten.In a known welding system, the end portions of an animal seed tube are held between a pivotable anvil and an opposed ultrasonic vibrator and ultrasonically welded by the ultrasonic vibrator. With the known welding system, welded sequins can be produced with high throughput and tolerable error rate by the users. However, it has been found that faulty sequins are often due to leaks at the weld site. Leaks can occur in particular by the action of the ultrasound on the exposed wall sections of the tube in the transition region between the cylindrical wall sections of the tube and clamped between the anvil and the ultrasonic oscillator, flat superimposed wall sections of the tube during welding.
Es ist daher die Aufgabe der vorliegenden Erfindung eine Vorrichtung und ein Verfahren zum Verschweißen von Behältern und insbesondere von Kunststoffröhrchen zur Aufbewahrung von Tiersamen bereitzustellen, die ein Verschweißen der Behälter bzw. Kunststoffröhrchen mit einer weiter reduzierten Fehlerrate und insbesondere einer Verschweißungsstelle höherer Qualität ermöglichen.It is therefore the object of the present invention to provide an apparatus and a method for welding containers and in particular plastic tubes for the storage of animal semen, which enable a welding of the containers or plastic tubes with a further reduced error rate and in particular a welding point higher quality.
Diese Aufgabe wird gelöst durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 sowie ein Verfahren mit den Merkmalen des Anspruchs 10. Erfindungsgemäß wird eine Vorrichtung zum Verschweißen von Materialabschnitten eines Behälters, wie beispielsweise von Wandabschnitten eines Kunststoffröhrchens mittels Ultraschall bereitgestellt, die einen Amboß, einen Ultraschallschwinger zur Abgabe von Ultraschall und eine Halteeinrichtung umfaßt, wobei der Amboß relativ zum Ultraschall seh winger und zur Halteeinrichtung zwischen einer geöffneten und einer geschlossenen Position so bewegbar ist, daß in der geschlossenen Position zwei einander überlappende Materialabschnitte zwischen dem Amboß und dem Ultraschallschwinger und zwischen dem Amboß und der Halteeinrichtung gehalten und unter Einwirkung des Ultraschalls miteinander verbunden werden können.This object is achieved by a device having the features of claim 1 and a method having the features of claim 10. According to the invention there is provided an apparatus for welding portions of material of a container, such as wall sections of a plastic tube by means of ultrasound, comprising an anvil, an ultrasound transducer for delivering ultrasound and a holding device, the anvil being positioned relative to the ultrasonic viewer and the holding means between an open position and a closed position is movable so that in the closed position, two overlapping portions of material between the anvil and the ultrasonic vibrator and between the anvil and the holding means can be held and connected to each other under the action of ultrasound.
Im Gegensatz zu dem bisher bekannten Verschweißsystem werden die Materialabschnitte eines Röhrchens zur Aufnahme von Tiersamen nicht nur zwischen einem Amboß und einem Ultraschallschwinger gehalten und unter der Einwirkung von Ultraschall und Druck verschweißt, sondern umfaßt die erfindungsgemäße Vorrichtung neben dem Ultraschallschwinger eine zusätzliche, mit dem Amboß zusammenwirkende Halteeinrichtung, die vom Ultraschallschwinger baulich getrennt ist und von der keine Ultraschallenergie ausgeht. Die zu verschweißenden Materialabschnitte werden daher während des Verschweißens nicht nur zwischen dem Amboß und dem Ultraschallschwinger gehalten, sondern zusätzlich zwischen dem Amboß und der Halteeinrichtung. Dies hat den Vorteil, daß die zu verschweißenden Materialabschnitte zumindest an einer Stelle gehalten werden, an der kein unmittelbarer Eintrag von Ultraschallenergie in die Materialabschnitte erfolgt. Dadurch werden die Materialabschnitte bei geschlossenem Amboß präziser in ihrer Position gehalten und nicht von durch Ultraschall erzeugten Vibrationen beeinflußt, was hinsichtlich der Qualität der Verschweißung zu besser reproduzierbaren Ergebnissen fuhrt. Insbesondere kann die Verschweißungs- stelle mit hoher Reproduzierbarkeit symmetrisch zum Röhrchen, d.h. im wesentlichen auf der Symmetrieachse des Röhrchens hergestellt werdenIn contrast to the previously known welding system, the material sections of a tube for holding animal semen are not only held between an anvil and an ultrasonic vibrator and welded under the action of ultrasound and pressure, but the device according to the invention comprises, in addition to the ultrasonic oscillator, an additional cooperating with the anvil Holding device, which is structurally separated from the ultrasonic vibrator and from which no ultrasonic energy emanates. The sections of material to be welded are therefore held during welding not only between the anvil and the ultrasonic vibrator, but in addition between the anvil and the holding device. This has the advantage that the material sections to be welded are held at least at a point at which no direct entry of ultrasonic energy into the material sections takes place. As a result, the material sections are more accurately held in position with the anvil closed and are not affected by ultrasound generated vibrations, which leads to better reproducible results in terms of weld quality. In particular, the weld site can be symmetrical with the tube with high reproducibility, i. be made substantially on the axis of symmetry of the tube
Gemäß einer Ausfuhrungsform sind der Ultraschallschwinger und die Halteeinrichtung nebeneinander angeordnet, während sich der Amboß und der Ultraschallschwinger sowie der Amboß und die Halteeinrichtung in der geschlossenen Position der Vorrichtung gegenüberliegen. Gemäß einer weiteren Ausführungsform weisen der Amboß und der Ultraschallschwinger zumindest eine Eingriffsfläche auf, wobei sich die Eingriffsflächen in der geschlossenen Position gegenüber liegen. Beide Eingriffsflächen weisen vorzugsweise dieselbe Breite und im wesentlichen dieselbe Größe auf.According to one embodiment, the ultrasonic vibrator and the holding device are arranged side by side, while the anvil and the ultrasonic vibrator and the anvil and the holding device in the closed position of the device are opposite. According to a further embodiment, the anvil and the ultrasonic oscillator have at least one engagement surface, wherein the engagement surfaces are opposite in the closed position. Both engagement surfaces preferably have the same width and substantially the same size.
Gemäß einer besonders bevorzugten Ausführungsform ist die Halteeinrichtung so neben dem Ultraschallschwinger angeordnet und eingerichtet, daß in geschlossener Position die Materialabschnitte eines Röhrchens zwischen dem Amboß und dem Ultraschallschwinger und dem Amboß und der Halteeinrichtung gehalten werden und dabei das Röhrchen neben der Halteeinrichtung und von dem Ultraschallschwinger durch die Halteeinrichtung getrennt, angeordnet ist.According to a particularly preferred embodiment, the holding device is arranged next to the ultrasonic oscillator and arranged so that in the closed position, the material portions of a tube between the anvil and the ultrasonic transducer and the anvil and the holding device are held while the tube adjacent to the holding device and of the ultrasonic oscillator the holding device is separated, arranged.
Dadurch kann erreicht werden, daß das Röhrchen und auch die angenäherten Materialabschnitte im Übergangsbereich beim Verschweißen gegenüber den vom Ultraschallschwinger ausgehenden Ultraschallschwingungen wesentlich abgeschirmt sind und eine negative Einwirkung des Ultraschalls, wie beispielsweise die Anregung von Vibrationen der Materialabschnitte vermieden werden kann.It can thereby be achieved that the tube and also the approximate material sections in the transition region during welding are substantially shielded from the ultrasound oscillations emanating from the ultrasonic vibrator and a negative effect of the ultrasound, such as the excitation of vibrations of the material sections, can be avoided.
Des weiteren kann ein Eintrag von Ultraschallenergie in die Samenflüssigkeit im Röhrchen verhindert werden, der zur Schädigung der Samenflüssigkeit führen kann.Furthermore, an entry of ultrasonic energy into the seminal fluid in the tube can be prevented, which can lead to the damage of the seminal fluid.
Gemäß einer besonders bevorzugten Ausführungsform ist in der geschlossenen Position der Abstand zwischen dem Amboß und der Halteeinrichtung größer als der Abstand zwischen dem Amboß und dem Ultraschallschwinger bzw. der Abstand zwischen deren Eingriffsflächen. Wenn die Halteeinrichtung so neben dem Ultraschallschwinger angeordnet ist, daß sie sich nahe an der Kante der sich berührenden Materialabschnitte befindet, kann erreicht werden, daß sich geschmolzenes, aufgrund der Druckausübung zwischen dem Amboß und dem Ultraschallschwinger in Richtung des Röhrchens fließendes Material in etwa an der Kante zwischen den sich zwischen dem Amboß und der Halteeinrichtung berührenden Materialabschnitten des Röhrchens ansammelt, so daß die Wandabschnitte des Röhrchens an der Kante durch zusätzliches Material verstärkt werden.According to a particularly preferred embodiment, in the closed position the distance between the anvil and the holding device is greater than the distance between the anvil and the ultrasonic vibrator or the distance between their engagement surfaces. If the holding device is arranged next to the ultrasonic vibrator, that it is close to the edge of the contacting material portions, it can be achieved that melted, due to the application of pressure between the anvil and the ultrasonic oscillator in the direction of the tube material flowing approximately at the Edge accumulates between the contacting between the anvil and the holding means material portions of the tube, so that the wall portions of the tube are reinforced at the edge by additional material.
Gemäß einer weiteren bevorzugten Ausführungsform weist auch die Halteeinrichtung eine Eingriffsfläche auf, die parallel zur Eingriffsfläche des Ultraschallschwingers angeordnet und gegenüber dieser zurückversetzt ist. Durch das Vorsehen einer Eingriffsfläche anstatt einer scharfen Kante kann ein Reißen bzw. Durchstoßen des Materialabschnitts beim Verschweißen vermieden werden.According to a further preferred embodiment, the holding device has an engagement surface which is arranged parallel to the engagement surface of the ultrasonic vibrator and is set back from this. By providing an engagement surface instead of a sharp edge, tearing or piercing of the material portion during welding can be avoided.
Durch einen vergrößerten Abstand zwischen den Eingriffsflächen des Amboß und der Halteeinrichtung kann sich geschmolzenes Material in diesem Bereich ansammeln und zur Verstärkung der Verschweißung insbesondere an der inneren Kante der sich berührenden Materialabschnitte beitragen.By increasing the distance between the engagement surfaces of the anvil and the retainer, molten material may accumulate in this region and contribute to strengthening the weld, particularly at the inner edge of the contacting material portions.
Gemäß einer weiteren bevorzugten Aufführungsform weist die Vorrichtung eine Einrichtung auf, die eingerichtet und so bewegbar ist, daß sie den in der geschlossenen Position zwischen den gegenüberliegenden Eingriffsflächen des Amboß und des Ultraschall seh wingers und gegebenenfalls zwischen den gegenüberliegenden Eingriffsflächen des Amboß und der Halteeinrichtung gebildeten Raum seitlich zumindest auf zwei gegenüberliegenden Seiten verschließt. Dadurch wird erreicht, daß geschmolzenes Material der Wandabschnitte am Ende nicht zur Seite abfließen kann, sondern in Richtung der geraden Kante zwischen den sich berührenden Wandabschnitten an der Vorderseite der Vorrichtung, wo es zu einer Verstärkung der Verschweißungsstelle beitragen kann.According to a further preferred embodiment, the apparatus comprises means adapted and movable to move the space formed in the closed position between the opposing engagement surfaces of the anvil and the ultrasonic viewer and optionally between the opposed engagement surfaces of the anvil and the support means closes laterally at least on two opposite sides. This ensures that molten material of the wall sections at the end can not flow off to the side, but in the direction of the straight edge between the contacting wall sections at the front of the device, where it can contribute to a reinforcement of the weld.
Gemäß noch einer weiteren Ausführungsform weisen der Amboß und die Halteeinrichtung jeweils eine abgeschrägte Vorderfläche auf, die im Verhältnis zur Ebene der Eingriffsfläche des Amboß bzw. des Ultraschallschwingers geneigt sind und in geschlossener Position der Vorrichtung eine Form eines Trichters bilden, der in den zwischen den Flächen des Amboß und der Halteeinrichtung und dem Ultraschallschwinger gebildeten Raum mündet. Durch die abgeschrägten Vorderflächen des Amboß und der Halteeinrichtung werden bei der Bewegung des Amboß in die geschlossene Position die gegenüberliegenden Wandabschnitte des Röhrchens zusammengedrückt. Des weiteren werden die aneinander angenäherten Materialabschnitte durch die abgeschrägten Vorderflächen des Amboß bzw. der Halteeinrichtung während des Verschweißungsvorgangs in Position gehalten.According to yet another embodiment, the anvil and the holding device each have a bevelled front surface that is inclined relative to the plane of the engagement surface of the anvil and the ultrasonic vibrator and in the closed position of the device form a funnel formed in between the surfaces the anvil and the holding device and the ultrasonic oscillator formed space opens. By the angled front surfaces of the anvil and the holding device, the opposite wall portions of the tube are compressed during the movement of the anvil in the closed position. Furthermore, the approximated portions of material are held in place by the angled front surfaces of the anvil or retainer during the welding operation.
Gemäß einer weiteren Ausfuhrungsform weisen der Amboß und der Ultraschallschwinger sowie die Halteeinrichtung jeweils mehrere nebeneinander angeordnete Flächen zur gleichzeitigen Verschweißung mehrerer Behälter oder Röhrchen auf. Die Flächen können unterschied- liehe Größen aufweisen, so daß Behälter oder Röhrchen verschiedener Größen mit ein und derselben Vorrichtung verschweißt werden können.According to a further embodiment, the anvil and the ultrasonic oscillator and the holding device each have a plurality of juxtaposed surfaces for the simultaneous welding of a plurality of containers or tubes. The areas may differ have sizes so that containers or tubes of different sizes can be welded with one and the same device.
Erfindungsgemäß wird des weiteren ein Verfahren zum Verschweißen von Abschnitten mit einer Vorrichtung mit den oben beschrieben Merkmalen bereitgestellt. Das Verfahren umfaßt die Schritte eines Anordnens von zwei einander überlappenden Materialabschnitten am Ultraschallschwinger und an der Halteeinrichtung, eines Bewegens des Ambosses zum Ultraschallschwinger und zur Halteeinrichtung, so daß die Abschnitte in Eingriff mit dem Eingriffsflächen des Amboß, des Ultraschallschwingers und der Halteeinrichtung gelangen und dazwischen gehalten werden, und eines Eintragens von Ultraschallenergie vom Ultraschallschwinger in die Materialabschnitte, so daß diese miteinander Verschweißen. Anstelle des oben genannten Bewegens des Ambosses zum Ultraschallschwinger und zur Halteeinrichtung kann umgekehrt auch ein Bewegen, insbesondere ein paralleles Bewegen des Ultraschallschwingers und der Halteeinrichtung zum Amboß erfolgen. Im Allgemeinen ist für den Verschweißvorgang nur die Relativbewegung zwischen dem Amboß und dem Ultraschallschwinger und der Halteeinrichtung entscheidend.According to the invention, a method for welding sections with a device having the features described above is further provided. The method comprises the steps of disposing two overlapping portions of material on the ultrasonic transducer and the support, moving the anvil to the ultrasonic transducer, and the support so that the portions engage and engage the engagement surfaces of the anvil, the ultrasonic vibrator, and the support and introducing ultrasound energy from the ultrasonic transducer into the material sections so that they weld together. Conversely, instead of the above-mentioned movement of the anvil to the ultrasonic oscillator and to the holding device, a movement, in particular a parallel movement of the ultrasonic oscillator and the holding device to the anvil, can take place. In general, only the relative movement between the anvil and the ultrasonic vibrator and the holding device is crucial for the welding process.
Das erfindungsgemäße Verfahren hat den Vorteil, daß die zu verschweißenden Materialabschnitte an zumindest einer Stelle zwischen dem Amboß und der Halteeinrichtung lediglich gehalten werden, ohne daß an dieser Stelle unmittelbar ein Eintrag von Ultraschallenergie in die Materialabschnitte erfolgt. Dadurch können die Wandabschnitte besser in Position gehalten werden und besser reproduzierbare Verschweißungen erzielt werden.The method according to the invention has the advantage that the material sections to be welded are merely held at at least one point between the anvil and the holding device, without any direct entry of ultrasonic energy into the material sections at this location. As a result, the wall sections can be better held in position and better reproducible welding can be achieved.
Gemäß einer weiteren Ausführungsform erfolgt beim Bewegen des Ambosses zum Ultraschallschwinger und zur Halteeinrichtung ein Formen der Materialabschnitte durch die abgeschrägten Vorderseiten des Ambosses und der Halteeinrichtung. Insbesondere durch das Bewegen des Ambosses zum Ultraschallschwinger und zur Halteeinrichtung werden die ursprünglich eine Zylinderform bildenden Wandabschnitte durch die Vorderseiten angenähert, so daß sie sich schließlich entlang einer Kante an der Vorderseite des geschlossenen Ambosses berühren.According to a further embodiment, when the anvil is moved relative to the ultrasonic vibrator and the holding device, the material sections are shaped by the bevelled front sides of the anvil and the holding device. In particular, by moving the anvil to the ultrasonic vibrator and to the holding device, the wall sections originally forming a cylindrical shape are approximated by the front sides, so that they finally touch along an edge at the front of the closed anvil.
Gemäß einer weiteren bevorzugten Ausführungsform erfolgt das Verschweißen der Abschnitte durch gleichzeitiges Ausüben von Druck durch die Flächen des Ambosses und des Ultraschallschwingers und durch Eintragen von Ultraschallenergie in die Abschnitte. Durch den Druck wird einerseits der Kontakt zwischen den Abschnitten und dem Ultraschallschwinger verstärkt, so daß die Ultraschallenergie effizienter in die Materialabschnitte eingetragen werden kann. Andererseits werden die geschmolzenen Materialabschnitte durch den ausgeübten Druck miteinander verbunden und verschweißt.According to a further preferred embodiment, the welding of the sections takes place by simultaneously exerting pressure through the surfaces of the anvil and the ultrasonic vibrator and by introducing ultrasonic energy into the sections. By the Pressure on the one hand, the contact between the sections and the ultrasonic transducer is amplified, so that the ultrasonic energy can be registered more efficiently in the material sections. On the other hand, the molten material portions are bonded and welded together by the applied pressure.
Gemäß noch einer weiteren Ausführungsform beginnt das Eintragen von Ultraschallenergie vom Ultraschallschwinger in die Abschnitte bevor der Amboß die endgültige Position erreicht hat und maximaler Druck auf die Abschnitte ausgeübt wird. Dadurch kann ein besonders rascher Verschweißungsprozeß erzielt werden.According to yet another embodiment, the introduction of ultrasonic energy from the ultrasonic transducer into the sections begins before the anvil reaches the final position and maximum pressure is applied to the sections. As a result, a particularly rapid welding process can be achieved.
Das Verfahren kann gemäß noch einer weiteren Ausführungsform das seitliche Verschließen des durch die Flächen des Ambosses und des Ultraschall Schwingers gebildeten Raums umfassen.The method may, according to yet another embodiment, comprise the lateral closure of the space formed by the surfaces of the anvil and the ultrasonic vibrator.
Weitere Merkmale, Vorteile und Eigenschaften der vorliegenden Erfindung ergeben sich aus der folgenden Beschreibung einer bevorzugten Ausführung der Erfindung in Verbindung mit der beigefügten Zeichnung. In der Zeichnung zeigtFurther features, advantages and features of the present invention will become apparent from the following description of a preferred embodiment of the invention in conjunction with the accompanying drawings. In the drawing shows
Fig. 1 schematisch eine Anordnung eines Samenröhrchens in der erfindungsgemäßenFig. 1 shows schematically an arrangement of a seed tube in the inventive
Vorrichtung gemäß einer Ausführungsform im Querschnitt;Device according to one embodiment in cross section;
Fig. 2 eine perspektivische Ansicht der erfindungsgemäßen Vorrichtung gemäß einerFig. 2 is a perspective view of the device according to the invention according to a
Ausführungsform mit jeweils vier Verschweißpositionen für Pailletten mit 1,92 und 2,9 mm Durchmesser;Embodiment with four welding positions for sequins with 1.92 and 2.9 mm diameter;
Fig. 3a-3c die Halteeinrichtung der erfindungsgemäßen Vorrichtung gemäß der in Fig. 2 gezeigten Ausführungsform in mehreren perspektivischen Ansichten;3a-3c, the holding device of the device according to the invention according to the embodiment shown in Figure 2 in several perspective views ..;
Fig. 4a und 4b den Ultraschallschwinger der erfindungsgemäßen Vorrichtung gemäß der in Fig. 2 gezeigten Ausführungsform im Querschnitt und in einer perspektivischen Ansicht;4a and 4b, the ultrasonic oscillator of the device according to the invention according to the embodiment shown in Figure 2 in cross section and in a perspective view ..;
Fig. 5a-5c den Amboß der erfindungsgemäßen Vorrichtung gemäß der in Fig. 2 gezeigten Ausführungsform im Querschnitt bzw. in perspektivischen Ansichten;5a-5c, the anvil of the device according to the invention according to the embodiment shown in Figure 2 in cross-section and in perspective views ..;
Fig. 6a und 6b eine Kammerbegrenzungseinrichtung der erfindungsgemäßen Vorrichtung der Fig. 2 gezeigten Ausführungsform; und6a and 6b show a chamber limiting device of the device according to the invention of the embodiment shown in FIG. 2; and
Fig. 7 die erfindungsgemäße Vorrichtung gemäß der in Fig. 2 gezeigten Ausführungsform in einer Schnittansicht Im Folgenden wird die erfindungsgemäße Vorrichtung gemäß einer beispielhaften Ausfuh- rungsform anhand der Figuren beschrieben.Fig. 7 shows the device according to the invention according to the embodiment shown in Fig. 2 in a sectional view The device according to the invention will now be described in accordance with an exemplary embodiment with reference to the figures.
Gemäß der erfindungsgemäßen Ausfuhrungsform umfaßt eine Vorrichtung zum Verschweißen von Materialabschnitten, insbesondere Wandabschnitten eines Behälters, wie beispielsweise eines Röhrchens 1 zur Aufnahme von Samenflüssigkeit einen Amboß 2, der zwischen einer geöffneten und einer geschlossenen Position bewegbar ist. Insbesondere ist der Amboß 2 schwenkbar an der Vorrichtung montiert. Die Vorrichtung umfaßt des weiteren einen Ultraschallschwinger 3, wie beispielsweise eine sogenannte Sonotrode, die zu Schwingungen mit einer Frequenz von beispielsweise 40 kHz angeregt werden kann. Des weiteren umfaßt die Vorrichtung eine Halteeinrichtung 4, wie beispielsweise einen Gegenhalter.According to the embodiment of the invention, an apparatus for welding portions of material, in particular wall portions of a container, such as a tube 1 for receiving seminal fluid, comprises an anvil 2 which is movable between an open and a closed position. In particular, the anvil 2 is pivotally mounted to the device. The device further comprises an ultrasonic transducer 3, such as a so-called sonotrode, which can be excited to oscillate at a frequency of, for example, 40 kHz. Furthermore, the device comprises a holding device 4, such as a counter-holder.
Wie in den Figuren 1 , 2 und 7 zu erkennen ist, sind der Ultraschallschwinger 3 und die Halteeinrichtung 4 unmittelbar nebeneinander angeordnet. Der Amboß 2 ist so an der Vorrichtung montiert, daß in einer geschlossenen Position der Vorrichtung, wie sie in Fig.1 , 2 und 7 gezeigt ist, Eingriffsflächen 5 und 6 des Ambosses bzw. des Ultraschall Schwingers 3 einander gegenüberliegend und im wesentlichen parallel zueinander orientiert sind. Der seitliche Abstand zwischen der der Halteeinrichtung 4 und dem Ultraschallschwinger 3 ist sehr gering kann beispielsweise lOμm, 20μm oder 50μm umfassen. Zwischen den Eingriffsflächen 5 und 6 des Ambosses 2 und des Ultraschallschwingers 3 können gegenüberliegende Wandabschnitte 7 und 8 des Röhrchens 1 gehalten werden.As can be seen in FIGS. 1, 2 and 7, the ultrasonic oscillator 3 and the holding device 4 are arranged directly next to one another. The anvil 2 is mounted on the device so that in a closed position of the device, as shown in Figures 1, 2 and 7, engaging surfaces 5 and 6 of the anvil and the ultrasonic vibrator 3 are opposite each other and substantially parallel to each other are oriented. The lateral distance between the holding device 4 and the ultrasound oscillator 3 is very small, for example, 10 .mu.m, 20 .mu.m or 50 .mu.m include. Between the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3 opposite wall portions 7 and 8 of the tube 1 can be maintained.
Der Amboß 2 und der Ultraschallschwinger 3 sind im Verhältnis zueinander so angeordnet, daß die Eingriffsflächen 5 und 6 des Ambosses 2 und des Ultraschallschwingers 3 in der geschlossenen Position einen geringen Abstand voneinander aufweisen, wie beispielsweise 100 μm, 200 μm, 500 μm oder 1 mm. Die Eingriffsfläche 5 des Ambosses 2 weist des weiteren einen Abschnitt mit einer gegenüber der Eingriffsfläche 5 zurückversetzten Fläche 9 auf. Durch diese zurückversetzte Fläche 9 der Eingriffsfläche 5 wird zusätzlicher Raum zwischen den Eingriffsflächen 5 und 6 des Ambosses 2 bzw. des Ultraschallschwingers 3 erhalten, der zur Aufnahme von geschmolzenem Material der Materialabschnitte 7, 8 des Röhrchen 1 dienen kann. Wie in den Figuren 1 , 2 und 7 zu erkennen ist, ist die Halteeinrichtung 4 zwischen dem Ultraschallschwinger 3 und einem in der Vorrichtung angeordneten Röhrchen 1 an der Vorrichtung montiert. Die Halteeinrichtung 4 umfaßt eine Eingriffsfläche 10, die parallel zur Eingriffsfläche 6 des Ultraschallschwingers 3 ausgerichtet ist, jedoch gegenüber der Eingriffsfläche 6 des Ultraschallschwingers 3 beispielsweise um 100 μm, 200 μm, 500 μm oder 1 mm zurückversetzt ist. Durch die zurückversetzte Eingriffsfläche 10 wird erreicht, daß geschmolzenes Material der Wandabschnitte 7, 8 des Röhrchens 1 zur Kante zwischen den sich berührenden Wandabschnitten 7, 8 ins Innere des Röhrchens fließen und sich dort ansammeln kann, so daß ein Wulst 11 gebildet wird, der die Verschweißung zwischen den Wandabschnitten 7, 8 verstärkt. Des weiteren wird durch die Eingriffsfläche 10 im Vergleich zu einer scharfen Kante ein geringerer punktueller Druck auf den Wandabschnitt 8 des Röhrchens 1 erzeugt, so daß die Gefahr eines Einreißens des Wandabschnitts 8 und damit einer Undichtigkeit des Röhrchens 1 vermindert wird.The anvil 2 and the ultrasonic vibrator 3 are arranged in relation to each other so that the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3 in the closed position have a small distance from each other, such as 100 microns, 200 microns, 500 microns or 1 mm , The engagement surface 5 of the anvil 2 further comprises a portion with a recessed relative to the engagement surface 5 surface 9. By this recessed surface 9 of the engagement surface 5 additional space between the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3 is obtained, which can serve to receive molten material of the material sections 7, 8 of the tube 1. As can be seen in FIGS. 1, 2 and 7, the holding device 4 is mounted between the ultrasonic vibrator 3 and a tube 1 arranged in the device on the device. The holding device 4 comprises an engagement surface 10, which is aligned parallel to the engagement surface 6 of the ultrasonic vibrator 3, but compared to the engagement surface 6 of the ultrasonic vibrator 3, for example, by 100 microns, 200 microns, 500 microns or 1 mm set back. By the recessed engagement surface 10 is achieved that molten material of the wall portions 7, 8 of the tube 1 to the edge between the contacting wall sections 7, 8 flow into the interior of the tube and can accumulate there, so that a bead 11 is formed, which Welding between the wall sections 7, 8 reinforced. Furthermore, by the engagement surface 10 as compared to a sharp edge, a lesser selective pressure on the wall portion 8 of the tube 1 is generated, so that the risk of tearing of the wall portion 8 and thus a leakage of the tube 1 is reduced.
Der Amboß 2 und die Halteeinrichtung 4 weisen jeweils abgeschrägte Vorderflächen 12, 13 auf, die im Verhältnis zu den Ebenen der Eingriffsflächen 5 und 6 des Ambosses 2 und des Ultraschallschwingers 3 einen Winkel von 45° haben. Der hier gezeigte Neigungswinkel ist jedoch nur beispielhaft und es können auch andere Neigungswinkel geeignet sein. Es können anders als die hier gezeigten planen Vorderflächen auch anders geformte, wie z.B. gebogene Vorderflächen verwendet werden. Die abgeschrägten Vorderflächen 12 und 13 dienen als Anlageflächen für die Wandabschnitte 7, 8 des Röhrchens 1 und zur Formung des Übergangs von der durch die Wandabschnitte 7 und 8 des Röhrchen 1 gebildeten Zylinderform zur Kante zwischen den sich berührenden Wandabschnitten 7, 8 am Ende der abgeschrägten Vorderflächen 12, 13.The anvil 2 and the holding device 4 each have beveled front surfaces 12, 13 which have an angle of 45 ° relative to the planes of the engagement surfaces 5 and 6 of the anvil 2 and the ultrasonic vibrator 3. However, the inclination angle shown here is only an example and other angles of inclination may be suitable. Other than the planar front surfaces shown here, differently shaped ones such as e.g. curved front surfaces are used. The beveled front surfaces 12 and 13 serve as abutment surfaces for the wall sections 7, 8 of the tube 1 and for forming the transition from the cylindrical shape formed by the wall sections 7 and 8 of the tube 1 to the edge between the contacting wall sections 7, 8 at the end of the bevelled Front surfaces 12, 13.
In der erfindungsgemäßen Vorrichtung werden die Wandabschnitte 7 und 8 des Röhrchens zwischen dem Amboß 2 und der Halteeinrichtung 4 und dem Amboß und dem Ultraschallschwinger 3 gehalten. Da die Halteeinrichtung 4 nicht zu Schwingungen angeregt wird und zwischen dem Röhrchen und dem Ultraschallschwinger positioniert ist, können Ultraschallschwingungen von den Wandabschnitten 7 und 8 insbesondere im Übergangsbereich zwischen den zylinderförmigen Wandabschnitten des Röhrchens und den sich an der Kante berührenden Materialabschnitten ferngehalten werden, so daß keine unkontrollierten Verschiebungen oder Verformungen der Materialabschnitte durch Vibrationen auftreten und besser reproduzierbare Verschweißungsergebnisse erzielt werden können. Des weiteren werden Einwirkungen der Ultraschallenergie auf eine im Röhrchen 1 aufgenommene Samenflüssigkeit vermieden.In the device according to the invention, the wall sections 7 and 8 of the tube are held between the anvil 2 and the holding device 4 and the anvil and the ultrasonic oscillator 3. Since the holding device 4 is not excited to vibrate and is positioned between the tube and the ultrasonic vibrator, ultrasonic vibrations of the wall sections 7 and 8, in particular in the transition region between the cylindrical wall portions of the tube and touching the edge material portions are kept away, so that no Uncontrolled shifts or deformations of the material sections due to vibrations occur and more reproducible welding results can be achieved. Furthermore, will be Exposing the ultrasonic energy to a recorded in the tube 1 seminal fluid avoided.
Mit der erfindungsgemäßen Vorrichtung könne darüber hinaus mit hoher Reproduzierbarkeit zu den Röhrchen im wesentlichen symmetrisch angeordnete Verschweißungsstellen erreicht werden und die Zahl fehlerhaft verschweißter, insbesondere undichter Röhrchen kann gegenüber herkömmlichen Vorrichtungen vermindert werden.With the device according to the invention, moreover, with a high reproducibility to the tubes, essentially symmetrically arranged welding points can be achieved and the number of incorrectly welded, in particular leaky tubes can be reduced compared to conventional devices.
Wie insbesondere in den Fig. 2 bis 5 erkennbar ist, umfassen der Amboß 2, der Ultraschallschwinger 3 und die Halteeinrichtung 4 mehrere gleiche Eingriffsflächen 5, 6 bzw. 10 (beispielsweise 8) nebeneinander. Darüber hinaus haben die Eingriffsflächen 5, 6 und 10 eine unterschiedliche Breite. Damit können mehrere Röhrchen 1 und darüber hinaus auch Röhrchen 1 unterschiedlichen Durchmessers gleichzeitig verschweißt werden. Typischerweise haben die Flächen der Eingriffsflächen des Amboß 3 und des Ultraschallschwingers 3 eine Größe von ca. 2 x 2 mm. Die Eingriffsflächen der Halteeinrichtung 4 können beispielsweise eine Fläche von 2 x 0,5 mm aufweisen.As can be seen in particular in FIGS. 2 to 5, the anvil 2, the ultrasonic vibrator 3 and the holding device 4 comprise a plurality of identical engagement surfaces 5, 6 and 10 (for example 8) side by side. In addition, the engagement surfaces 5, 6 and 10 have a different width. Thus, several tubes 1 and also tubes 1 of different diameters can be welded simultaneously. Typically, the areas of the engagement surfaces of the anvil 3 and the ultrasonic vibrator 3 have a size of about 2 x 2 mm. The engagement surfaces of the holding device 4 may, for example, have an area of 2 × 0.5 mm.
Zwischen den Eingriffsflächen 5, 6 und 10 des Amboß 2, des Ultraschallschwingers 3 und der Halteeinrichtung 4 sind jeweils Ausnehmungen 15, 16 und 17 vorgesehen, in die Zähne 18 einer Kammerbegrenzung 19 eingreifen können. Wie der Amboß 2 ist auch die Kammerbegrenzung bewegbar und insbesondere schwenkbar ausgebildet. Die Zähne 18 der Kammerbegrenzung 19 dienen dazu, den zwischen den Eingriffsflächen 5, 6 und 10 des Ambosses 2, des Ultraschallschwingers 3 bzw. der Halteeinrichtung 4 definierten Raum seitlich zu begrenzen, so daß geschmolzenes Material der Wandabschnitte 7, 8 nur in Richtung des Röhrchens 1 bzw. entgegengesetzt dazu, jedoch nicht seitlich aus dem durch die Eingriffsflächen definierten Raum fließen kann.Between the engagement surfaces 5, 6 and 10 of the anvil 2, the ultrasonic vibrator 3 and the holding device 4 each recesses 15, 16 and 17 are provided, can engage in the teeth 18 of a chamber boundary 19. As the anvil 2 and the chamber boundary is movable and in particular designed to be pivotable. The teeth 18 of the chamber boundary 19 serve to laterally define the space defined between the engagement surfaces 5, 6 and 10 of the anvil 2, the ultrasonic vibrator 3 and the holding device 4, so that molten material of the wall sections 7, 8 only in the direction of the tube 1 or opposite thereto, but can not flow laterally out of the space defined by the engagement surfaces.
Der Amboß 2, der Ultraschallschwinger 3, die Halteeinrichtung 4 und die Kammerbegrenzung 19 sind in der Vorrichtung an einem Rahmen 20 montiert, wie in Fig. 2 gezeigt ist, wobei der Amboß 2 und die Kammerbegrenzung 19 mittels eines (in den Fig. nicht gezeigten) Mechanismus' schwenkbar gehalten werden.The anvil 2, the ultrasonic vibrator 3, the retainer 4 and the chamber boundary 19 are mounted in the device on a frame 20, as shown in Fig. 2, wherein the anvil 2 and the chamber boundary 19 by means of (not shown in Figs ) Mechanism 'be kept pivotable.
Beim Betrieb der Vorrichtung wird zunächst ein Röhrchen 1 neben den Eingriffsflächen 10 und 6 der Halteeinrichtung 4 bzw. des Ultraschallschwingers 3 angeordnet. Der Amboß 2 ist in die geöffnete Position geschwenkt und befindet sich somit von der Halteeinrichtung 4 und dem Ultraschallschwinger 3 entfernt. Dann wird der Amboß 2 in Richtung der Halteeinrichtung 4 und des Ultraschallschwingers 3 geschwenkt, so daß die Eingriffsflächen 5 des Ambosses 2 die Eingriffsfläche 6 des Ultraschallschwingers 3 und die Eingriffsfläche 10 der Halteeinrichtung 4 in Kontakt mit den Wandabschnitten 7 bzw. 8 des Röhrchens 1 gebracht werden. Dabei werden die Wandabschnitte 7 und 8 im Endbereich des Röhrchens 1 angenähert. Durch das Zusammendrücken der Wandabschnitte 7 und 8 im Endbereich des Röhrchens 1 gelangen auch die abgeschrägten Vorderflächen 12 und 13 des Amboß 2 bzw. der Halteeinrichtung 4 in Eingriff mit den Wandabschnitten 7 und 8 des Röhrchens 1. Es wird ein in etwa keilförmiger Übergang zwischen der Zylinderform des Röhrchens 1 und der Kante zwischen den sich berührenden Materialabschnitten 7, 8 in der Nähe der Halteeinrichtung 4 gebildet, sobald der Amboß 2 und die Halteeinrichtung 4 und der Ultraschallschwinger 3 soweit angenähert sind, daß die Wandabschnitte 7 und 8 sich am Ende der abgeschrägten Vorderflächen 12 und 13 des Amboß 2 bzw. der Halteeinrichtung 4 berühren.During operation of the device, first of all a tube 1 is arranged next to the engagement surfaces 10 and 6 of the holding device 4 or of the ultrasonic vibrator 3. The anvil is 2 pivoted in the open position and is thus removed from the holding device 4 and the ultrasonic transducer 3. Then, the anvil 2 is pivoted in the direction of the holding device 4 and the ultrasonic vibrator 3, so that the engagement surfaces 5 of the anvil 2, the engagement surface 6 of the ultrasonic vibrator 3 and the engagement surface 10 of the holding device 4 brought into contact with the wall sections 7 and 8 of the tube 1 become. In this case, the wall sections 7 and 8 are approximated in the end region of the tube 1. By compressing the wall sections 7 and 8 in the end region of the tube 1 and the chamfered front surfaces 12 and 13 of the anvil 2 and the holding device 4 engage with the wall sections 7 and 8 of the tube 1. It is an approximately wedge-shaped transition between the Cylindrical shape of the tube 1 and the edge formed between the contacting material portions 7, 8 in the vicinity of the holding device 4, once the anvil 2 and the holding means 4 and the ultrasonic vibrator 3 are approached so far that the wall portions 7 and 8 at the end of the chamfered Front surfaces 12 and 13 of the anvil 2 and the holding device 4 touch.
Der Ultraschallschwinger 3 wird durch einen Ultraschallgenerator (nicht gezeigt) vorzugsweise in Ultraschallschwingungen versetzt, bevor der Amboß 2 seine endgültige geschlossene Position erreicht hat, um sobald wie möglich Ultraschallenergie in die Wandabschnitte 7, 8 einzutragen. Der genaue Zeitpunkt, zu dem der Ultraschallschwinger in Verhältnis zur Schließbewegung des Amboß 2 in Schwingungen versetzt ist jedoch variabel und einstellbar. Typischerweise wird der Ultraschallschwinger 3 mit einer Frequenz von 40 kHz betrieben. Jedoch ist auch dieser Wert variabel. Durch den vom Amboß 2 und dem Ultraschallschwinger ausgeübten Druck und die auf die Wandabschnitte 7, 8 übertragenen Schallenergie, wird das Material des Röhrchens zwischen den Eingriffsflächen geschmolzen und in Richtung des Röhrchens 1 und in entgegengesetzter Richtung verdrängt. Aufgrund der Kammerbegrenzung 19, mit der der Raum zwischen der Eingriffsfläche 5 des Amboß 2 und der Eingriffsfläche 6 des Ultraschallschwingers 3 verschlossen ist, kann das geschmolzene Material nicht seitlich aus diesem Raum fließen.The ultrasonic vibrator 3 is preferably ultrasonically vibrated by an ultrasonic generator (not shown) before the anvil 2 has reached its final closed position so as to introduce ultrasonic energy into the wall sections 7, 8 as soon as possible. However, the precise timing at which the ultrasonic vibrator is vibrated relative to the closing movement of the anvil 2 is variable and adjustable. Typically, the ultrasonic vibrator 3 is operated at a frequency of 40 kHz. However, this value is variable. By the pressure exerted by the anvil 2 and the ultrasonic vibrator and the sound energy transmitted to the wall sections 7, 8, the material of the tube is melted between the engagement surfaces and displaced in the direction of the tube 1 and in the opposite direction. Due to the chamber boundary 19, with which the space between the engagement surface 5 of the anvil 2 and the engagement surface 6 of the ultrasonic vibrator 3 is closed, the molten material can not flow laterally out of this space.
An der Kante, an der sich die Wandabschnitte 7 und 8 im Übergangsbereich berühren, führt das zusätzliche flüssige Material zur Bildung eines Wulstes 11 , der zu einer Verstärkung der Verschweißung zwischen den Wandabschnitten 7 und 8 an der vorderen Berührungskante führt. Die Bildung des Wulstes 11 wird dadurch begünstigt, daß die Eingriffsfläche 10 der Haltereinrichtung 4 gegenüber der Eingriffsfläche 6 des Ultraschallschwingers 3 zurückversetzt ist.At the edge where the wall portions 7 and 8 contact each other in the transition area, the additional liquid material results in the formation of a bead 11 which results in an increase in the welding between the wall portions 7 and 8 at the front contact edge. The formation of the bead 11 is facilitated by the engagement surface 10 of the Holder device 4 is set back relative to the engagement surface 6 of the ultrasonic vibrator 3.
Nach dem Verschmelzen der Wandabschnitte 7 und 8 wird der Ultraschallgenerator abgeschaltet, so daß das verschmolzene Material der Wandabschnitte 7, 8 erkalten kann. Danach wird die Kammerbegrenzung 19 aus den Zwischenräumen in den Eingriffsflächen entfernt und der Amboß 2 wird weggeschwenkt.After the fusion of the wall sections 7 and 8, the ultrasonic generator is switched off, so that the fused material of the wall sections 7, 8 can cool. Thereafter, the chamber boundary 19 is removed from the spaces in the engagement surfaces and the anvil 2 is pivoted away.
An der nur beispielhaft angegebenen Ausführungsform der erfindungsgemäßen Vorrichtung können zahlreiche Änderungen vorgenommen werden, ohne den Umfang der Erfindung zu verlassen. Beispielsweise ist es denkbar, anstelle der zurückversetzten Eingriffsfläche 10 der Halteeinrichtung 4 eine entsprechende zurückversetzte Fläche am Amboß 2 vorzusehen, um einen Raum für die Bildung einer Wulst aus geschmolzenem Material zu bilden. Auch wäre es denkbar, sowohl am Amboß 2 als auch an der Halteinrichtung 4 zurückversetzte Flächen vorzusehen. Numerous changes can be made to the exemplary embodiment of the device according to the invention without departing from the scope of the invention. For example, it is conceivable to provide a corresponding recessed surface on the anvil 2 instead of the recessed engagement surface 10 of the retainer 4 to form a space for forming a bead of molten material. It would also be conceivable to provide recessed surfaces both on the anvil 2 and on the holding device 4.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007056737A DE102007056737A1 (en) | 2007-11-26 | 2007-11-26 | Device for closing plastic containers |
| DE102007056737.7 | 2007-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009068227A1 true WO2009068227A1 (en) | 2009-06-04 |
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ID=40344275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/009893 Ceased WO2009068227A1 (en) | 2007-11-26 | 2008-11-21 | Device for closing plastic containers |
Country Status (2)
| Country | Link |
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| DE (1) | DE102007056737A1 (en) |
| WO (1) | WO2009068227A1 (en) |
Families Citing this family (1)
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| DE102011004002A1 (en) | 2011-02-11 | 2012-08-16 | Herrmann Ultraschalltechnik Gmbh & Co. Kg | Method for producing a transverse sealing seam and transverse sealing device |
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|---|---|---|---|---|
| US3996724A (en) * | 1975-10-16 | 1976-12-14 | Ex-Cell-O Corporation | Rotary carton closing and sealing apparatus |
| GB2017041A (en) * | 1978-03-20 | 1979-10-03 | Jagenberg Werke Ag | Apparatus for folding and sealing the top of a carton |
| US4534818A (en) * | 1983-12-22 | 1985-08-13 | Frito-Lay, Inc. | Method and apparatus for ultrasonic sealing |
| WO1995002537A1 (en) * | 1993-07-15 | 1995-01-26 | Tetra Laval Holdings & Finance S.A. | Packaging container sealing apparatus |
| EP1127794A2 (en) * | 2000-02-23 | 2001-08-29 | Shikoku Kakoki Co., Ltd. | Ultrasonic sealing apparatus |
| EP1174096A2 (en) * | 2000-07-21 | 2002-01-23 | Minitüb Abfüll- und Labortechnik GmbH & Co. KG | Filling device for boar sperm and method for it's operation |
| JP2003212219A (en) * | 2002-01-22 | 2003-07-30 | Ace Medical Inc | Ultrasonic sealing device |
| WO2006041380A1 (en) * | 2004-10-15 | 2006-04-20 | Tetra Laval Holdings & Finance S.A. | A counter jaw arrangement |
| WO2007008131A2 (en) * | 2005-07-08 | 2007-01-18 | Tetra Laval Holdings & Finance S.A. | Device and method for transverse sealing |
| EP1872929A2 (en) * | 2006-06-30 | 2008-01-02 | Hoya Corporation | Process for producing a plastic lens |
-
2007
- 2007-11-26 DE DE102007056737A patent/DE102007056737A1/en not_active Withdrawn
-
2008
- 2008-11-21 WO PCT/EP2008/009893 patent/WO2009068227A1/en not_active Ceased
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3996724A (en) * | 1975-10-16 | 1976-12-14 | Ex-Cell-O Corporation | Rotary carton closing and sealing apparatus |
| GB2017041A (en) * | 1978-03-20 | 1979-10-03 | Jagenberg Werke Ag | Apparatus for folding and sealing the top of a carton |
| US4534818A (en) * | 1983-12-22 | 1985-08-13 | Frito-Lay, Inc. | Method and apparatus for ultrasonic sealing |
| WO1995002537A1 (en) * | 1993-07-15 | 1995-01-26 | Tetra Laval Holdings & Finance S.A. | Packaging container sealing apparatus |
| EP1127794A2 (en) * | 2000-02-23 | 2001-08-29 | Shikoku Kakoki Co., Ltd. | Ultrasonic sealing apparatus |
| EP1174096A2 (en) * | 2000-07-21 | 2002-01-23 | Minitüb Abfüll- und Labortechnik GmbH & Co. KG | Filling device for boar sperm and method for it's operation |
| JP2003212219A (en) * | 2002-01-22 | 2003-07-30 | Ace Medical Inc | Ultrasonic sealing device |
| WO2006041380A1 (en) * | 2004-10-15 | 2006-04-20 | Tetra Laval Holdings & Finance S.A. | A counter jaw arrangement |
| WO2007008131A2 (en) * | 2005-07-08 | 2007-01-18 | Tetra Laval Holdings & Finance S.A. | Device and method for transverse sealing |
| EP1872929A2 (en) * | 2006-06-30 | 2008-01-02 | Hoya Corporation | Process for producing a plastic lens |
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| Publication number | Publication date |
|---|---|
| DE102007056737A1 (en) | 2009-05-28 |
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