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EP3253568A1 - Procédé et dispositif pour le moulage d'au moins un fond sur un tronçon de tuyau flexible - Google Patents

Procédé et dispositif pour le moulage d'au moins un fond sur un tronçon de tuyau flexible

Info

Publication number
EP3253568A1
EP3253568A1 EP16700554.5A EP16700554A EP3253568A1 EP 3253568 A1 EP3253568 A1 EP 3253568A1 EP 16700554 A EP16700554 A EP 16700554A EP 3253568 A1 EP3253568 A1 EP 3253568A1
Authority
EP
European Patent Office
Prior art keywords
connection
side flaps
folded
folding
triangular
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.)
Withdrawn
Application number
EP16700554.5A
Other languages
German (de)
English (en)
Inventor
Uwe Köhn
Thomas Hawighorst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP3253568A1 publication Critical patent/EP3253568A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • 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
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both surfaces to be joined
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B29C66/53462—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies joining substantially flat covers and substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/851—Bag or container making machines
    • B29C66/8511—Bag making machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/36—Folding sheets, blanks or webs by continuously feeding them to stationary members, e.g. plates, ploughs or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/644—Making seals parallel to the direction of movement, i.e. longitudinal sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • 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
    • B29L2031/7128—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B31B2150/0014—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom having their openings facing transversally to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/002—Flexible containers made from sheets or blanks, e.g. from flattened tubes by joining superimposed sheets, e.g. with separate bottom sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents

Definitions

  • the invention relates to a method for molding at least one base to a piece of tubing, which comprises plastic material, according to the preamble of claim 1 and a device for molding at least one bottom to a piece of tubing comprising plastic material according to the preamble of claim 10
  • Production of sacks, in particular cross-bottom sacks is raised to bottom at least one end of the hose piece to form a bottom rectangle and triangular pockets along at least one first folded edge. Thereafter, the two resulting side flaps of the bottom rectangle are folded back along second folding edges, which are spaced from the first folding edge, wherein the two side flaps then contact each other.
  • the object of the present invention is therefore to propose a method and a device for avoiding the discharge of contents from the finished bag.
  • the contacting surfaces of the side flaps and the triangular pockets are connected together at least in the region of the second folded edges to form a connection.
  • This area includes parts of the second folded edges. If the Settenlaschen folded back, thereby arise - also triangular - contact surfaces between each side flap and each triangle pocket, wherein the respective contact surface of the side flap and the contact surface of the triangular pocket are connected to each other over a portion of the second folded edge. At least in part of the contact surface in the region of this folded edge side tab and triangular pocket are now connected to each other, so that a possible trickle channel is interrupted.
  • a complete connection along this contact surface is not necessary to avoid giant channels.
  • a connection is produced, wherein a smaller Part is understood as less than 20% of this contact surface, whereby the method is particularly efficient feasible.
  • the joined portion advantageously extends to an area of the surface spaced at least 1 cm from the seaming edge.
  • a trickle canal can be avoided very well, wherein the compound also has sufficient strength, without having to fear that this compound dissolves again.
  • the connection is arranged in or at the folded edge, that at least the region of the intersection of the folded edge with the diagonal comprises the triangular pocket.
  • connection extends from the point of intersection extends at least 1 cm in the direction of the folded edge.
  • connection in connection with the above-mentioned advantageous feature, according to which the connection extends over a surface which starts at the seaming edge and extends to at least 1 cm distance from this, results in an area which is so large that it safely extends below a later applied ground cover sheet, even if this is shifted due to manufacturing tolerances compared to the desired position. The leakage of filling material is thus avoided particularly well.
  • the invention relates to hose pieces comprising plastic material.
  • it is hose pieces that consist exclusively of plastic material and just do not have other materials, such as paper.
  • Such Schiauch publishede may consist of plastic film material, as it can be produced in film extrusion equipment. Apart from a hose formation, further processing steps are unnecessary here.
  • plastic pieces comprising hose pieces may also include a fabric which For example, has stretched plastic tape. This fabric can also be coated.
  • such a piece of tubing may comprise non-woven material, which is also referred to as non-woven material.
  • a nonwoven material is characterized in that individual plastic fibers are joined together under pressure and / or heat.
  • Such a nonwoven material may also be provided with a coating or form a laminate using at least one plastic film.
  • a hot-air sealing method is advantageously used. The advantage of this is that it is a very efficient process with which it is also possible to produce sufficiently durable compounds.
  • the material is not overstressed because only near-surface areas are involved in the sealing process.
  • the regions of the two connection partners to be joined in this case parts of the triangular pocket and parts of the side flaps, are heated at their mutually facing sides by injection of hot air until plastification and immediately brought into contact with each other.
  • a subsequent pressing in a press nip which may be formed by two rollers.
  • connection takes place by means of an ultrasonic welding.
  • the ultrasonic welding process is a welding process in which high-frequency mechanical vibrations cause molecular and boundary surface friction in the bonding zone. This creates heat at this interface, so that the material is plasticized here. Compression or compression of this area leads to a tight connection, so that no filling material can escape.
  • it is provided to produce an adhesive application on the areas provided for the connection. It is useful to apply the adhesive before or at the latest when folding back the side flaps. It is particularly advantageous, however, to apply the adhesive before opening the floor, since it is then avoided that the adhesive gets onto the side wall of the later bag and possibly an unwanted bonding of the triangular pocket to the side wall takes place.
  • the adhesive is preferably applied with an adhesive nozzle.
  • the adhesive trace emerging from the adhesive nozzle can be introduced directly into the already formed or later occurring folded edge.
  • hotmelt As adhesives known cold adhesives can be used.
  • heat-activated hotmelt which is inexpensive, is applied.
  • the latter is particularly advantageous in the case of an adhesive application which takes place before the floors are opened.
  • This hotmelt solidifies after the job, so that the bottom opening or bottom closure can be done without the hotmelt adhering to the bottom opening or bottom closing tools, which could otherwise interfere.
  • the hotmelt can be reactivated by a heat input so that the connection between the triangle pocket and the side flap is now established. If hot air is used in the ground production for permanently closing the bottom, as is well known, for example, for applying a cover sheet, then the heat input caused thereby already suffices to activate the hotmelt. A separate heater is therefore not necessary.
  • a further advantageous variant of an adhesive entry is the introduction of a plastic extrudate into the second folded edge shortly before or during the folding over of the side flap.
  • the plastic extrudate is a liquefied plastic material, in particular the same or a similar plastic material as at least the surface of the hose piece. Again, this is a cost effective way of applying glue.
  • the further turning of the side flap takes place before the curing of the Extrudates, so that by pressing or pressing a connection is formed, which prevents leakage of the filling material from the bag interior.
  • a device for molding a floor to a ski piece which comprises plastic material, according to claim 10.
  • the feature essential to the invention is a device with which the surfaces of the side flaps coming into contact and the triangular pockets can be connected to one another, at least in the region of the second folding flaps, to form a connection.
  • Such a device may be a hot-air sealing device, which is arranged in the region of a respective folding device, with which a side flap can be folded back onto the corresponding triangular pockets along the second folded edges.
  • an extrusion nozzle can be arranged at the same location, with which an extrudate can be placed in or immediately adjacent to the folded edge.
  • an ultrasonic welding device may be provided, which of the above Folding device is immediately downstream.
  • Ultrasonic welding device can be produced in the region of the second folded edge, if the side flap already rests on the triangular pocket,
  • a device for applying a hot melt is provided, which is also located within the folding device or this is arranged upstream. However, it is particularly advantageous if it is arranged upstream of the device for opening the bottom of the hose piece.
  • Fig. 1 schematic diagram of an apparatus for producing plastic-containing bags
  • Fig. 2 Essential steps for producing a bag from a
  • Fig. 3 piece of tubing with traces of adhesive on the later folding edges
  • Fig. 4 An embodiment with a hot air sealing device
  • FIG. 5 shows a cross-section of an envelope element from FIG. 4
  • Fig. 6 shows a further cross section of an envelope element of the figure
  • FIG. 7 shows another view of the exemplary embodiment according to FIG. 4 8 is a plan view of the embodiment according to FIG. 7
  • Fig. 9 An embodiment with an extrusion device
  • Fig. 10 An embodiment with an ultrasonic welding device
  • FIG. 1 schematically shows individual steps for processing a plastic-containing tube, such as a film tube or a tube of coated tissue into sacks, as they take place in the sack manufacturing device 1.
  • a plastic-containing tube such as a film tube or a tube of coated tissue into sacks
  • the hose 2 is fed to the bag making apparatus 1. This advantageously takes place by unwinding the tube 3 forming a tube in an unwinding device 4. Subsequently, the tube 2 can experience the so-called opening in the optional opening station 5, which is preferably used in a fabric tube. In this case, the tube is guided around an inner tool, which separates the two layers, so that the layers, if they were glued together in one of the manufacturing steps of the tube separate. Only with separate layers can it be ensured that the following production steps can be carried out properly. Subsequently, the so separated Materia Ilagen the hose are put back on top of each other. The tube is then fed to the cross-cutting device 6, which separates the tube into individual tube pieces 20.
  • FIG. 2.1 illustrates the steps for molding floors onto the hose piece 20, wherein the hose piece can be brought by means of the transport device 19 to the individual stations, with which the steps for molding floors onto hose pieces can be carried out.
  • At least one end, preferably both ends, of the piece of tubing is raised, the top layer being folded back along the bottom center line 21, so that the bottom rectangle 22 and the triangular pockets 23 form.
  • the second folded edges 24 are drawn with dotted lines around which the side flaps 25, 26, with which the areas are designated beyond the second folding edges, are folded over.
  • step c) and d The side flaps 25 and 26 are folded around these second folded edges in step c) and d), which preferably takes place slightly offset in time so as not to cause a disturbance. It has now been created a ground 27.
  • step b) a so-called valve pad 30 was previously attached to a triangular pocket, which later provides an opening for filling the finished bag.
  • step e) a cover sheet 31 is now fastened on the bottom of the bag such that both side flaps are connected to one another and to the triangular pockets adjoining on both sides.
  • hatched rectangles indicate that overlapping connecting regions 32 are provided directly adjacent to the folded edges or with folded edges.
  • connection areas may be provided on more than one or all of the triangle pockets. If a valve is provided, connecting areas in the area of the valve are unnecessary.
  • Figure 2.2 shows the relevant area in an enlarged view. The connection area is shown only on one side of the folding line, but it is immediately clear that after the folding of the side flaps 24, 25, the connecting surface also acts on the folded side flaps 24, 25, so that it can also be said that the connecting surface lies on both sides of the second folded edges.
  • FIGS 3.1 and 3.2 now show a first embodiment of the invention, in which on the triangular pockets along the (later) second folding edges 24 an adhesive trace 34 of heat-activated adhesive (so-called hot melt adhesive) is applied.
  • a hotmelt connection can not create a load-bearing connection, it is not necessary at the location mentioned and for the aforementioned sealing function, so that the cost-effective hotmelt offers cost advantages here.
  • FIG. 4 shows a further advantageous embodiment of the present invention.
  • an envelope element 41 is shown as an example, which is part of a bottom closing station and with which the side flap 26 is folded back along the second folded edge 24 on the open floor.
  • a bottom forming device up to four envelope elements are provided to convert all side flaps can.
  • the cover member 41 has a U-shaped configuration, wherein in the further course in the direction z of the typical Arc developed to an edge to successively perform the turnover, without acting on the side flap too large forces that could lead to a misalignment of the second folded edge or other errors.
  • the U-shape of the cover element 41 can be clearly seen in the figure 5, which represents a cross section.
  • a hot air device 44 which comprises at least one air feed 45, a heating element 46 and a tube 47 for supplying the hot air to the hot air sealing point.
  • the tube 47 opens into a hot air nozzle 48, which is shown in FIG.
  • the hot air nozzle is preferably a slot die, which is characterized in that its cross section has a width which is at least three times the height.
  • FIG. 7 now shows a perspective view of a part of the bottom closing station with an envelope element 41.
  • the inner guide element 42 is shorter than the outer guide element 43 and that in the end region of the inner guide member 42, the hot air nozzle 48 is arranged so that the hot air z in direction over the end of the inner guide member 42 in the area between the Side tab and the triangle pocket can be injected directly to and / or in the fold edge.
  • the point at which this occurs can be referred to as joint 49.
  • the piece of hose with the soil to be zu include is not shown for better representation of the machine components.
  • a nip formed by the rollers 50, 51 is visible. This is used for pressing and thus the better connection of the hot air-sealed areas.
  • the rollers can be designed to be tempered, in particular cooled.
  • a second pair of rollers 50 ', 51' may be provided.
  • the side flaps are to be connected to the triangular pockets, but not to the open bottom rectangle and thus to the interior of the bag, two alternatives offer advantages.
  • at least the tube 47 can be designed to be pivotable together with the nozzle 48. In this pivoted position, the tube is shown with broken lines and reference numeral 47 '.
  • the hot air flow can also be interrupted by, for example, a valve (not shown) being provided in the tube. In both cases, a control is provided, with which the hot air flow is cyclically injected into the joint 49.
  • FIG. 8 shows the situation of FIG. 7 in a plan view and with a hose piece 20 which is located in the envelope element 41 immediately before the inlet.
  • FIG. 9 shows a further embodiment of the invention is shown, which is configured similar to the embodiment in Figure 7.
  • the hot air nozzle is replaced by an extrusion die 60, with which an extrudate is directly on or in the second fold edge gebbar.
  • the extrudate can also be fed via a tube 61.
  • the extrudate is fed from an extruder, not shown, in which plastic is liquefied.
  • the tube 61 in the position 61 ' can be swung off to prevent any unwanted connection, for example between side flap and Boden rectangle, arise.
  • a collecting element 62 may be provided for collecting possibly dripping extrudate.
  • a pair of rollers 50, 51 can be provided following the joint, which additionally compresses the interconnected side flaps and triangular pockets, while the hot and thus liquefied material cools.
  • FIG. 10 shows a further advantageous embodiment of the invention, in which an ultrasonic welding device 70 for welding provided by side flaps and triangular pockets.
  • This ultrasonic welding device comprises a combination of a sonotrode 71 and an anvil 72.
  • these two elements are shown as rollers, but it is also possible to form them differently.
  • the welding is to take place during the transport, at least one of the two components mentioned may, for example, be circumferential or oscillating.
  • the cycle advance of the hose pieces at least one of the two components can be stationary. However, even with a continuous transport of the hose pieces, a component may be stationary.
  • the further components of the bottom closing station can be configured as in the exemplary embodiment of FIGS. 4 to 9.
  • roller pair 73, 74 can in turn serve for pressing and / or cooling the connection point 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

L'invention concerne un procédé pour le moulage d'au moins un fond sur un tronçon (20) du tuyau flexible, qui comprend un matériau synthétique, dans lequel – au moins une extrémité du tronçon de tuyau flexible est relevée le long d'au moins un bord de pliage (21) pour former un rectangle (22) de fond et des poches (23) triangulaires, – pour fermer le fond, des brides latérales (25, 26) du rectangle de fond sont repliées le long de deuxièmes bords de pliage (24), qui sont éloignés du premier bord de pliage, les deux brides latérales étant ensuite en contact et – une feuille de recouvrement de fond (31) est placée sur le fond et reliée sous l'effet de la chaleur ou au moyen d'un adhésif avec les brides latérales et au moins une poche triangulaire. Les surfaces des brides latérales et des poches triangulaires qui entrent en contact sont reliées les unes aux autres au moins au niveau des deuxièmes bords de pliage avec formation d'un assemblage (32).
EP16700554.5A 2015-01-30 2016-01-12 Procédé et dispositif pour le moulage d'au moins un fond sur un tronçon de tuyau flexible Withdrawn EP3253568A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015201691.9A DE102015201691A1 (de) 2015-01-30 2015-01-30 Verfahren und Vorrichtung zum Anformen wenigstens eines Bodens an ein Schlauchstück
PCT/EP2016/050453 WO2016120059A1 (fr) 2015-01-30 2016-01-12 Procédé et dispositif pour le moulage d'au moins un fond sur un tronçon de tuyau flexible

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EP3253568A1 true EP3253568A1 (fr) 2017-12-13

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US (1) US20180022053A1 (fr)
EP (1) EP3253568A1 (fr)
CN (1) CN107405854A (fr)
BR (1) BR112017014757A2 (fr)
DE (1) DE102015201691A1 (fr)
WO (1) WO2016120059A1 (fr)

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PL3670171T3 (pl) * 2018-12-17 2021-06-14 Starlinger & Co Gesellschaft M.B.H. Urządzenie i sposób nanoszenia wierzchnich arkuszy na końce wężowych odcinków uformowanych wstępnie w dno krzyżowe
CN112141516B (zh) * 2020-09-29 2022-05-13 东莞市和信包装制品有限公司 一种塑料包装袋及其制作设备
DE102021001151A1 (de) * 2021-03-05 2022-09-08 Windmöller & Hölscher Kg Einrichtung und Verfahren zum Zulegen eines aufgezogenen Endes eines flach liegenden Schlauchstücks
US20240392072A1 (en) 2021-09-29 2024-11-28 Wacker Chemie Ag Method for preparing low-silanol polyorganosiloxanes
CN115246213B (zh) * 2022-07-25 2025-04-15 西安工业大学 一种线路涂覆机器人封口加压装置

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DE2020622A1 (de) * 1970-04-28 1971-11-11 Josef Schmitter Kg Diesel Und Verfahren und Vorrichtung zur Herstellung von Verpackungsmaterial fuer feuchtigkeitsempfindliches Gut
DE3236770A1 (de) * 1981-10-23 1983-06-16 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Ventilsack
AT400831B (de) * 1994-05-04 1996-03-25 Starlinger & Co Gmbh Sack aus polymer-, insbesondere polyolefingewebe und verfahren zu seiner herstellung
CZ289183B6 (cs) * 1995-01-25 2001-11-14 Windmöller & Hölscher Zařízení na vytahování konců plochých hadicových odřezků
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US20180022053A1 (en) 2018-01-25
WO2016120059A1 (fr) 2016-08-04
DE102015201691A1 (de) 2016-08-18
CN107405854A (zh) 2017-11-28
BR112017014757A2 (pt) 2018-01-16

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