Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
  • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
  • D06H7/22—Severing by heat or by chemical agents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
  • B26F3/00—Severing by means other than cutting; Apparatus therefor
  • B26F3/06—Severing by using heat
  • B26F3/08—Severing by using heat with heated members
  • B26F3/12—Severing by using heat with heated members with heated wires

Definitions

• the invention relates to a device for thermal cutting of a running textile web of meltable material, in particular a patterned textile web according to the preamble of claim 1.
• a cutting device for cutting a running, in particular patterned textile web of meltable material is known. It is proposed that the blade or wire-shaped cutting blade should be adjustable so that the interface on the cutting blade by means of a control device is selectable. Since, in addition, there is an increasing temperature range between the clamping points as compared with the middle range, a temperature adapted to the textile area can be selected. In particular, when using cutting wires, this design has not proven to be optimal. Furthermore, in WO 2004/070103 A1, a "V" -shaped cut is made possible by a temperature profile running asymmetrically to the textile web. This means that on the side - above or below - the textile web, the temperature is higher than on the opposite side. The fabric is melted wider on the warmer side resulting in the "V" shaped cut.
• DE 195 10 818 C1 discloses a resistance-heated separating device for textile webs, which, however, requires a non-contact temperature sensor, which is designated there as advantageous, and which is electrically connected to a comparator.
• a temperature sensor is complex and maintenance-prone.
• the temperature sensor for the desired cutting device also brings disadvantages, resulting in with disturbing influences such as pollution and Ambient light - if an optical sensor is used - result. This should be avoided.
• the separation device known from WO 01/83872 A1 also has such a disadvantageous temperature sensor.
• the object of the invention is to improve an apparatus for thermally cutting a running textile web of meltable material.
• An important aspect of this object is to improve the quality of the cut edge of an electrically heated thermal cutting device, especially in the case of changing fabrics, e.g. Fabric thickness, improve.
• Another important aspect of this task is to simplify the operation by the user, especially when changing jobs. In particular, the need for an additional temperature sensor - e.g. a non-contact temperature sensor - be avoided.
• the object is achieved by a device for thermal cutting according to claim 1.
• the measures of the invention initially have the consequence that the cutting device makes it possible in a special way to cut a textile web of different thicknesses into individual bands, in particular label bands, without additional temperature measurement.
• the solution to the problem comprises determining the optimum cutting temperature on the basis of textile parameters such as binding, fabric thickness, fabric material and the transport speed at the point of separation by the central control.
• This cutting temperature is transmitted to the electrically heated separation units as the setpoint.
• Each separation unit has its own temperature control and regulates the temperature at the point of separation according to the specified setpoint.
• the separation units are supplied via contact rails with electrical power. This eliminates both the complex up / down and Changing the cables for new orders and pattern changes as well as the cable variety in the different label widths. This results in better usability and a considerable time savings, which allows an even faster pattern or order change.
• According to the present invention can be used as a supply for the cutting device, a commercial DC power supply, while according to the prior art in series connection of the separation units, a controlled power source must be used.
• Essential to the invention is a control or regulation possibility of the separation units.
• the separation units each comprise a cutting wire with temperature-dependent electrical resistance.
• the current cutting temperature can be determined and / or regulated based on the electrical resistance of the cutting wire.
• the means for transmitting the desired cutting temperature to the electrically heated separation units Means for modulation of the target cutting temperature to the supply voltage (claim 5).
• the contact rail additional poles for transmitting the target cutting temperature to the electrically heated separation units have (claim 6).
• means for transmitting disturbance messages from the isolating units to the control device ie the means for determining the target cutting temperature
• the control device ie the means for determining the target cutting temperature
• the cutting wires are held in the upper or lower region of the separation units by means of a thermally conductive and electrically insulating material. As a result, the cutting wire heat is removed without the cutting wire is electrically short-circuited (claim 10). With this arrangement, it is possible to produce an asymmetric "V-shaped cut", optionally above or below, without having to accept the prior art nightles.
• Figure 1 is an illustration of a separation unit to a preferred embodiment of the present invention, from the side;
• Figure 2 is a schematic representation of the elements of the device to the embodiment of Figure 1;
• FIG. 3 is a photographic representation of the separation unit according to FIG. 1;
• FIGS. 1 and 3 shows a photographic representation of a multiplicity of juxtaposed separating units according to FIGS. 1 and 3.
• a separation unit as a whole is denoted by 1.
• the separation unit 1 for severing a textile web 2 made of meltable material is equipped with a cutting wire 3.
• the cutting wire 3 is in the embodiment via contact rails 4 with electrical power - in the present embodiment with electrical DC voltage - supplied.
• the cutting wire 3 has a temperature-dependent electrical resistance. This is the current one Cutting temperature determined based on the electrical resistance of the cutting wire and adjustable. It is envisaged that the temperature control is calibrated in the cold state, whereby cutting wire length differences and resulting resistance differences are compensated.
• contact rails 4 eliminates both a costly up / down and re-plugging the cables for new orders and pattern changes and the cable variety in the different label widths with the advantage of better usability and considerable time savings and the possibility of a very fast sample or Change of order.
• FIG. 2 shows a multiplicity of separation units 1 from FIG. 1 next to one another. All of these separation units 1 are connected to the contact rail 4.
• the contact rail 4 is connected to a DC voltage source 7.
• DC voltage source 7 These are in the present embodiment can be used to a commercial DC power supply. In an alternative embodiment, however, it is also possible to provide a commercially available AC voltage power supply unit for supplying the separation units with electrical power.
• the setpoint temperature is determined by a control unit 9.
• this control unit 9 uses the information about the special textile materials of the woven material - for example the strength and melting temperature of the warp and weft threads, but also the binding and fabric thickness resulting from the sample program.
• the pattern program can also yield very different strengths and melting temperatures for the adjacent warp threads and also for the different weft threads, eg depending on the colors of the warp and weft threads. These values are known to the sample program and from this corresponding setpoint temperatures are determined.
• the setpoint temperatures also depend on the cutting speed of the translational transport of the fabric material at the interface.
• the data of the nominal cutting temperature determined by the control device are modulated onto the supply voltage by means of a transmission device 8 designed as a modulation device.
• the data are transmitted to the setpoint temperatures via additional poles on the contact rail to the electrically heated separation units.
• the transmission device 8 is designed so that fault messages can also be transmitted from the separation units to the control device 9.
• These fault messages are also modulated onto the supply voltage as a modulation, in the present embodiment as a passive modulation according to the principle of load current modulation.
• all other conventional back-modulation methods can also be used.
• fault messages are generated by an optical sensor 6 for monitoring the position of the separation units 1. With the optical sensor 6, in particular, a printing of a separation unit 1 can be detected by the transported textile web 2 from the holder 5.
• Such a fault message of the optical sensor 6 is then transmitted via the modulation device 8 to the control unit 9, which can turn off the entire device to prevent further damage.
• a mechanical contact sensor for monitoring the position of the separation units is used instead of the optical sensor 6.
• the cutting wires 3 are clamped to cutting wire holders 10 made of thermally conductive and electrically insulating material.
• heat is removed from the cutting wire without the cutting wire being electrically short-circuited.
• This leads to an improved control behavior.
• it is possible to produce an asymmetric "V-shaped cut", optionally above or below.
• each separation unit 1 has its own temperature control and the temperature at the separation point can be regulated in accordance with the predetermined setpoint, differences between the separation units and external disturbances, in particular cooling by air flows at the cutting point can be compensated. It is thus achieved a consistent cut quality even with changing tissue.
• the temperature control is carried out indirectly by means of current regulation or by regulation of the electrical cutting performance of the separation units.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Mechanical Engineering (AREA)
• Treatment Of Fiber Materials (AREA)
• Details Of Cutting Devices (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38726819

Family Applications (1)

Country Status (6)

Cited By (3)

Families Citing this family (2)

Citations (6)

Family Cites Families (1)

• 2008
  • 2008-08-22 AT AT08783456T patent/ATE493542T1/de active
  • 2008-08-22 BR BRPI0816335 patent/BRPI0816335A2/pt not_active IP Right Cessation
  • 2008-08-22 EP EP08783456A patent/EP2188435B1/de not_active Not-in-force
  • 2008-08-22 CN CN2008801066009A patent/CN101802292B/zh not_active Expired - Fee Related
  • 2008-08-22 DE DE502008002176T patent/DE502008002176D1/de active Active
  • 2008-08-22 WO PCT/CH2008/000356 patent/WO2009033300A1/de not_active Ceased

Patent Citations (6)

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