Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
  • D03D47/34—Handling the weft between bulk storage and weft-inserting means
  • D03D47/36—Measuring and cutting the weft
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H51/00—Forwarding filamentary material
  • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
  • B65H51/205—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage by means of a fluid
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
  • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
  • B65H59/20—Co-operating surfaces mounted for relative movement
  • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
  • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D35/00—Smallware looms, i.e. looms for weaving ribbons or other narrow fabrics
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
  • D03D47/34—Handling the weft between bulk storage and weft-inserting means
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
  • D03D47/34—Handling the weft between bulk storage and weft-inserting means
  • D03D47/36—Measuring and cutting the weft
  • D03D47/368—Air chamber storage devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/30—Handled filamentary material
  • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

• the invention relates to a needle ribbon loom according to the preamble of claim 1.
• Needle looms of the type mentioned are known in many forms, such as from WO-A-96/19604.
• the ribbon loom contains a weft insertion needle, which is associated with a weft feeder, the - viewed in the direction of weft - a weft source, a weft brake, a weft conveyor and a pneumatically operated, designed as blowing or suction weft compensating device and before Weft insertion needle has a separate weft thread guide eye.
• a weft compensating device which is typically formed by a leg spring, as known, for example, from CH-646 397 A5.
• object of the invention is to improve a needle loom of the type described above.
• the object is achieved by a needle loom according to claim 1.
• the measures of the invention result in the provision of a needle loom whose weft supply on the one hand has a high control bandwidth and which therefore permits a high speed, but in which large fluctuations in the weft tension can be avoided, as shown in FIG is.
• a measured value and a limitation possibility for the weft tension are available, which can be advantageously used during operation of the needle loom.
• the measured values of the spring device can be used to display or output a warning when the limiting values are exceeded or fallen short of.
• the spring device is coupled to a drive device of the needle loom. According to claim 4 the drive is interrupted if the limit values of the weft tension are exceeded or exceeded.
• the spring means comprises a coil spring which is connected to a compensation pin or a plunger on which the guide eye is arranged. It may be advantageous to adjust the delivery rate of the weft conveyor by the position of the compensation pin controllable and to regulate accordingly.
• the pneumatic weft compensating device according to claim 8 can be used in a further developed form.
• it has a flow channel bounded by side walls for the passage of an air flow and the reception of a weft thread loop, wherein a plurality of air nozzles are arranged in a relay-like manner one behind the other in at least one side wall in the flow direction of the air flow.
• the distance between adjacent sidewalls of the flow channel is adjustable.
• Figure 1 is a diagram of the weft tension during operation of a conventional needle loom with a pneumatically operated, designed as blowing or suction weft compensation device;
• Figure 2 is a diagram of the weft tension in the operation of an older needle loom with leg spring for weft compensation
• FIG. 3 shows a diagram of the weft tension during operation of a needle loom in accordance with the present invention
• Figure 4 is a schematic representation of the weft thread guide when striking a weft thread
• Figure 5 is a schematic representation of the weft thread guide when entering a weft thread in a shed.
• FIGS. 4 and 5 shows a schematic illustration of the displaceability of the side walls of the flow channel of the weft compensating device from FIGS. 4 and 5.
• FIGS. 4 and 5 show essential components of the weft feeder of a needle loom in the schematic representation in the manner of a block diagram in two different operating states of the weft insertion needle.
• the weft supply shown starts with the shot cone 2, from which the weft thread 4 is withdrawn.
• the weft thread 4 is then guided by means of two pressure rollers 6 and 6 'on a transport roller 8 and supplied from this to the other components of the weft thread guide.
• the spring means 12 for measuring and / or limiting the spring force the real heart of the invention, in cooperation with a pneumatically operating weft compensating device 22, which is designed as an air flow device.
• the spring device 12 comprises a linear spring 14, which is connected on one side via a compensation pin 15 with a guide eye 16 for the weft thread 4. On the other side, the spring 14 is firmly attached to the spring housing.
• the spring device 12 has two end position sensors 18 and 20, each of which emits a signal when the end position is reached.
• the end position sensors 18 and 20 are designed as electrical sensors - switches.
• the end position sensors are designed as optical sensors.
• the deflection of the spring 14 is very small. The spring therefore primarily effects a change in tension on the weft thread, while in the exemplary embodiment described here the length compensation is effected almost exclusively by the weft-compensating device 22.
• the compensation pin 15 is horizontally movable by a few centimeters. This coupled with the spring 14 compensation pin 15 is positioned during operation of the loom and shows the weaver in which position which forces exist.
• the readjustment which can be carried out manually or automatically, for example by means of a control electronics, allows the compensation pin 15 to settle in the most advantageous position.
• the position of the compensation pin 15 at the very back means too loose thread. In both End positions front and rear, the machine is also stopped in the present embodiment.
• a position monitoring of the compensation pin 15 is provided over its entire possible path.
• the number of revolutions of the weaving machine can be easily increased to 3'00O revolutions per minute or more. It should be emphasized that in the embodiment described here the position of the spring 14 remains essentially unchanged due to its inertia during the weaving process. Thus, the spring does not participate in the movement - except in the start / stop phase - but passes on its defined tension in the end positions to the weft thread.
• the weft thread 4 extends from the spring device 12 further to the weft equalizer 22.
• the weft equalizer 22 has a flow channel defined by side walls for the passage of an air flow and the reception of a weft thread loop.
• five air nozzles 24 are arranged like a relay in a side wall in the flow direction of the air flow one behind the other, which provide a uniform tension of the weft thread.
• the flow channel - made of aluminum in the embodiment described here - can ensure a constant volume of air.
• a side wall 25 forming the flow channel-made of sheet steel in the exemplary embodiment described here-can, as shown in FIG. 6, be displaced at a distance a 0.3 to 1.8 mm from the opposite side wall 25 '.
• the weft compensating device 22 can be adjusted to different thread thicknesses and thread qualities, and thus also the tension force exerted on the weft thread.
• a memory effect is enabled with a constant volume of air.
• a plastic version of the central air block and the side plate can be provided. This is advantageous in terms of noise reduction, especially with thicker threads.
• this is supplied in the present embodiment via a guide and Umlenkinate 26 of the weft needle 28, the weft thread 4 with open shed and position of the reed 32 - as shown in Figure 5 - between the warp threads 34 einschiesst.
• Another advantage is illustrated by the following numerical example. On a machine designed for 50 mm belts, it is readily possible to weave a belt with a width of only 15 mm. Due to the air volume solution, there is always enough thread reserve.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Harvesting Machines For Specific Crops (AREA)
• Surgical Instruments (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37664553

Family Applications (1)

Country Status (7)

Families Citing this family (5)

Family Cites Families (6)

• 2007
  • 2007-06-27 TW TW096123158A patent/TW200825231A/zh unknown
  • 2007-07-05 DE DE502007003420T patent/DE502007003420D1/de active Active
  • 2007-07-05 CN CNA2007800329337A patent/CN101512055A/zh active Pending
  • 2007-07-05 EP EP07763934A patent/EP2059633B1/fr not_active Not-in-force
  • 2007-07-05 KR KR1020097003115A patent/KR20090046835A/ko not_active Application Discontinuation
  • 2007-07-05 AT AT07763934T patent/ATE463598T1/de active
  • 2007-07-05 WO PCT/CH2007/000327 patent/WO2008028303A1/fr active Application Filing

Non-Patent Citations (1)

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