EP1854913A1 - Procédé pour la production d'une barre synthétique pour des éléments de tricotage à mailles jetées et barre synthétique - Google Patents

Procédé pour la production d'une barre synthétique pour des éléments de tricotage à mailles jetées et barre synthétique Download PDF

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Publication number
EP1854913A1
EP1854913A1 EP07000963A EP07000963A EP1854913A1 EP 1854913 A1 EP1854913 A1 EP 1854913A1 EP 07000963 A EP07000963 A EP 07000963A EP 07000963 A EP07000963 A EP 07000963A EP 1854913 A1 EP1854913 A1 EP 1854913A1
Authority
EP
European Patent Office
Prior art keywords
plastic
fastener
fastening element
semi
bar
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Withdrawn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
EP07000963A
Other languages
German (de)
English (en)
Inventor
Kresimir Mista
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.)
Karl Mayer Textilmaschinenfabrik GmbH
Original Assignee
Karl Mayer Textilmaschinenfabrik GmbH
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 Karl Mayer Textilmaschinenfabrik GmbH filed Critical Karl Mayer Textilmaschinenfabrik GmbH
Publication of EP1854913A1 publication Critical patent/EP1854913A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/06—Needle bars; Sinker bars
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/24—Sinker heads; Sinker bars

Definitions

  • the invention relates to a method for producing a plastic Wirktechnikmaschinebarre, in which one forms a body from a plastic semi-finished, allowing the plastic to cure and at least one fastener is installed in the bar.
  • the invention relates to a plastic Wirktechnikmaschinebarre with a body having at least one layer of fiber reinforced plastic, and at least one fastener, which is connected to the body, wherein the fastener extends at least partially through the layer.
  • Such a method and a Wirkwerkmaschinebarre are for example off DE 41 11 108 A1 known.
  • a shaped body, which is used to attach more Components containing female threaded pieces or female thread is covered with plastic bands, which are each reinforced with a reinforcement threads containing mat.
  • plastic bands which are each reinforced with a reinforcement threads containing mat.
  • holes are drilled through the plastic, which then have to match the nut threads of the nut thread pieces.
  • the invention has for its object to simplify the production of a plastic Wirktechnikmaschinebarre.
  • This object is achieved in a method of the type mentioned above by using the fastener in the plastic semi-finished before curing.
  • a sheet material can usually handle much easier than a spatially shaped material. Accordingly, you can make a very precise positioning of the fastener with little effort.
  • the fastening element is fixed on a support which is inserted into a mold used for curing together with the semifinished product.
  • the position of the fastener is then determined by the carrier, so that a relatively accurate positioning can be achieved.
  • the carrier remains connected to the fastener during curing. After curing, the carrier is then demolded together with the mold from the bar and released from the bar.
  • a fastening geometry of the fastening element is used, with which the finished bar is brought into contact with other elements of a knitting machine.
  • the fastener has an internal thread, then you can connect the carrier by means of a screw with the fastener.
  • other mounting geometries are possible.
  • a hole is made in the plastic semi-finished product prior to the introduction of the fastening element.
  • the fiber structure of the fiber-reinforced plastic semifinished product is at best locally disturbed or interrupted. Otherwise, the fibers are not displaced or displaced.
  • the plastic semifinished product is preferably formed from a plurality of prepregs or carbon fiber mats laid over one another in different directions. If a hole is made prior to the introduction of the fastener, then it is possible to locally sever or rearrange fibers that run in different directions without otherwise disturbing the overall context of the fibers.
  • the hole is created by grooves.
  • a tool with a tip and an adjoining preferably conical increase in diameter is pressed by the semifinished product.
  • the reinforcing fibers are not destroyed, but displaced laterally, so that the bar later has a high stability. If the reinforcing fibers have different orientations in different layers of the semifinished product, no significant weakening is associated with the furrow even in the vicinity of the hole, because the reinforcing fibers can only be displaced laterally to their longitudinal extent.
  • the diameter of the tool is ultimately chosen as large as the diameter of the fastener.
  • At least one reinforcement of plastic semi-finished so that it is overlapped by a support flange of the fastener.
  • a support flange on the fastener provides increased security against the fact that the fastener, which is otherwise closely enclosed by the plastic, which has leaned close to the fastener during curing, is enclosed by the cured plastic.
  • additional reinforcement causes the plastic in the vicinity of the fastener is locally strengthened, so that you can apply greater forces for later attaching attachments to the bar or for attaching the bar to a knitting machine without the risk of damage.
  • the plastic semi-finished product is placed in a press mold to form an inner space and acts on the inner space during pressing with internal pressure.
  • a press mold to form an inner space and acts on the inner space during pressing with internal pressure.
  • the generation of an internal pressure is sufficient to apply the forces required for pressing the plastic semifinished product. With the generation of the internal pressure, it is usually also possible to let the plastic flow everywhere where it is desired, in particular, to apply snugly to the fastening element.
  • the hose is then inflated, it presses the plastic semi-finished product from the inside against the press mold or against the inserted into the press mold carrier, so that even with relatively small wall thicknesses obtains a sufficient stability of the bar.
  • the object is achieved in a plastic Wirkwerkmaschinebarre of the type mentioned in that the fastener is hardened in the layer.
  • the fastening element is therefore part of the layer, as it were.
  • the fastening element extends at least partially through the layer, so that it is geometrically part of the layer.
  • the fastening element is so tightly enclosed by the plastic during pressing of the plastic that the plastic glued to the fastening element over its entire surface. This results in an extraordinarily high holding force for the fastener in the body.
  • the fastening element has a support flange in the interior of the body.
  • the support flange ensures, however, that the fastener can be pulled out of the body.
  • the support flange thus also forms a kind of positive engagement, so that the forces with which you can apply the fastener can be relatively large. Since the support flange is located inside the body, it is of Not accessible on the outside and therefore can not be destroyed or damaged.
  • the support flange with an attachment axi is an angle ⁇ 90 °.
  • This design of the fastener facilitates the production.
  • the fastener is only on a relatively small area on the plastic semi-finished product.
  • the plastic at least in the region parallel to the longitudinal extent of the bar completely fills a space to the support flange. This results in the immediate vicinity of the fastener thickening, which further increases the capacity of the fastener in the bar. This load capacity can be further increased by placing additional layers of plastic semifinished product in the region of the fastener, so that ultimately result in locally predetermined thickening.
  • the fastening element has a shank, which extends completely through the layer. This has the advantage that a relatively large attachment length is the fastener available.
  • the shaft terminates with the outside of the bar. This results in a smooth outside of the bar, so that the risk of interference or injury to operators is relatively small.
  • the shaft is conical. This allows for a further increase in the forces that can act on the fastener.
  • the plastic of the body is placed completely on the conical shaft during pressing and forms a funnel-shaped space for receiving the switch, which tapers to the outside.
  • the body has an inner space in which a hose is arranged, which rests on the inside of the body and covers the fastening element from the inside.
  • the hose is used when pressing the bar to create a pressure in the interior.
  • the hose sticks to the bar and possibly also to the fastening element, so that it remains intact in the interior.
  • Fig. 1 shows a semifinished product 1 made of a fiber-reinforced plastic in expanded and flat shape.
  • the illustrated cross section shows the semifinished product corresponding to a cross section of a finished barre, as shown in FIGS. 4 and 5.
  • the semifinished product 1 is formed here by a prepreg.
  • this semifinished product 1 is also referred to as "layer", even if it is actually composed of several layers. In this case, reinforcing fibers in each individual layer may be arranged parallel to one another. The fibers of different layers then have different orientations.
  • the thickness of the semifinished product 1 is for example 2 mm.
  • the semifinished product 1 several holes 2, 3 are punched. Through each hole a fastener 4, 5 is guided.
  • the holes 2, 3 can also be formed by pressing a pointed tool through the semifinished product 1, so that the reinforcing fibers of the semifinished product 1 are not cut, but displaced laterally.
  • the fastening element 4 has a conical shaft 6 and a support flange 7, wherein the support flange 7 with an attachment axis 8 forms an acute angle.
  • the fastening element 5 has a cylindrical shaft 9 and a support flange 10, which has a slightly smaller extension than the support flange 7.
  • the semifinished product 1 As can be seen from Fig. 2, several reinforcements are placed on the semifinished product 1. These are two strips 11, 12, which extend parallel to the longitudinal extent of the semifinished product 1 and are arranged on both sides of the fastening elements 4.
  • the arrangement of the strips 11, 12 is such that the strips 11, 12 are overlapped by the support flange 7 of the fasteners 4, i. the support flange 7 is supported on the strip 11, 12 from.
  • a gap 13 remains between the strips 11, 12. In the region of the gap 13, the support flange 7 rests neither on the strips 11, 12 nor on the semifinished product 1.
  • the strips 11, 12 can be constructed in the same way as the semifinished product, that is to say through a plurality of layers of UD prepregs whose fibers have different orientations.
  • the strips 11, 12 may have a thickness of about 2 mm.
  • a further reinforcement 14 is provided which completely surrounds the fastening elements 5. Conveniently, the reinforcement 14 is placed on the semifinished product 1 before the holes 3 are punched out.
  • the reinforcement 14 has the same structure as the strips 11, 12.
  • supports 15, 16 are provided. Each carrier 15, 16 is placed on the support flanges 7, 10 opposite side of the semifinished product 1 to the semifinished product.
  • Bolt 17, 18 are by the carrier 15, 16 through and into internal threads 19, 20 of the fasteners 4, 5 screwed. In this case, the bolts 17, 18 are tightened so that the fasteners 4, 5 with their shank 6, 9 on the supports 15, 16 rise.
  • Another reinforcement 21 is placed along the other longitudinal edge of the semifinished product 1, whose structure corresponds to that of the strips 11, 12.
  • the semifinished product 1 provided with the fastening elements 4, 5, the strips 11, 12 and the reinforcements 14, 21 is inserted into a press mold 22 together with the supports 15, 16.
  • the press mold 22 has an upper part 23 and a lower part 24.
  • In the upper part 23 is a recess 25 for the carrier 16 and in the lower part 24 is a recess 26 for the carrier 15 is provided ( Figure 3).
  • the semifinished product 1 is now inserted into the press mold 22 so that an interior space 27 results and the semifinished product 1 overlaps in the region of its two reinforcements 14, 21. At this stage, there is still a small cavity 28 between the fastening element 4 and the strips 11, 12.
  • a tube 29 is inserted, which is pressurized, as long as the plastic of the semifinished product 1, the strip 11, 12 of the reinforcements 14, 21 is still malleable.
  • the press mold 22 is kept closed during the pressurization of the hose 29 and also under pressure.
  • the area along the longitudinal edges of the semifinished product 1 with the reinforcements 14, 21 therebetween are pressed together.
  • the semifinished product 1 is pressed by the pressure prevailing in the tube 29 from the inside against the press mold 22, so that a bar 30 results, as shown in FIGS. 4 and 5. It can be seen that the plastic of the strips 11, 12 has completely filled the area up to the support flange 7 of the reinforcing element 4.
  • the reinforcing element 4 extends completely through the semifinished product 1 and the strips 11, 12 and ends flush with the outside 31 of the bar 30. This has been achieved in a simple manner in that the carrier 15 forms a boundary for the outer side 31. By gaps that arise between the press mold 22 and the carriers 15, 16, superfluous plastic can be displaced.
  • the regions of the semifinished product 1 along its longitudinal edges with the reinforcements 14, 21 now form a fastening section 32 for receiving knitting tools, for example needles 33, which can be clamped to the fastening section 32 with the aid of a clamping piece 34 and a screw bolt 35.
  • the tube 29 remains inside the bar 30. It covers the fastener 4, so that the risk is low that impurities 4 get into the interior of the bar 30 through the fastener.
  • Fig. 5 shows the bar 30, in a sectional view outside the fasteners 4. It can be seen that in the region of the gap 13 has a reduced wall thickness the bottom wall 36 has arisen. But this is not critical, because no fasteners 4 are provided here.
  • the support flange 10 of the fastener 5 is surrounded on all sides by plastic, so to speak, so that the support flange 5 is held completely positive fit in the mounting portion 32.
  • shank 9 of the fastener 5 terminates with the outside of the bar 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
EP07000963A 2006-03-28 2007-01-18 Procédé pour la production d'une barre synthétique pour des éléments de tricotage à mailles jetées et barre synthétique Withdrawn EP1854913A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006014147A DE102006014147B4 (de) 2006-03-28 2006-03-28 Verfahren zum Herstellen einer Kunststoff-Wirkwerkzeugbarre und Kunststoff-Wirkwerkzeugbarre

Publications (1)

Publication Number Publication Date
EP1854913A1 true EP1854913A1 (fr) 2007-11-14

Family

ID=38513139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07000963A Withdrawn EP1854913A1 (fr) 2006-03-28 2007-01-18 Procédé pour la production d'une barre synthétique pour des éléments de tricotage à mailles jetées et barre synthétique

Country Status (5)

Country Link
EP (1) EP1854913A1 (fr)
KR (1) KR100881441B1 (fr)
CN (1) CN101046031B (fr)
DE (1) DE102006014147B4 (fr)
TW (1) TWI320435B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104131409A (zh) * 2014-07-12 2014-11-05 常德纺织机械有限公司 一种经编机的成圈工具

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010044673B4 (de) * 2010-09-08 2014-01-09 Karl Mayer Textilmaschinenfabrik Gmbh Wirkwerkzeugbarren-Reparaturset und Wirkwerkzeugbarre
DE102010045049B4 (de) * 2010-09-10 2012-10-04 Karl Mayer Textilmaschinenfabrik Gmbh Verfahren zum Herstellen einer Wirkwerkzeugbarre
EP3354782B1 (fr) * 2017-01-25 2019-08-07 Karl Mayer Textilmaschinenfabrik GmbH Barre de machine à tricoter et procédé de montage d'outils de tricotage
EP3421653B1 (fr) 2017-06-26 2019-09-18 KARL MAYER Textilmaschinenfabrik GmbH Barre pour les éléments de tricotage d'un métier à mailles jetées
EP3757267B1 (fr) * 2020-11-06 2022-09-07 KARL MAYER STOLL R&D GmbH Barre pour les éléments de tricotage pour un métier à mailles jetées

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4111108A1 (de) * 1991-04-05 1992-10-08 Erbsloeh Julius & August Als geschlossenes hohlprofil aus verstaerktem kunststoff ausgebildeter traeger
DE20314470U1 (de) * 2003-09-18 2003-11-20 KARL MAYER Malimo Textilmaschinenfabrik GmbH, 09117 Chemnitz Barre aus faserverstärktem Kunststoff-Hohlprofil

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383319B (de) * 1982-09-07 1987-06-25 Fischer Gmbh Rohrfoermiger hohlkoerper aus faserverstaerktem kunststoff, insbesondere strukturbauteil fuer ein fahrzeug, zur uebertragung von druck-,zug-,biege- und torsionskraeften
DE8816672U1 (de) 1988-12-01 1990-04-19 Karl Mayer Textilmaschinenfabrik GmbH, 6053 Obertshausen Kettenwirkmaschine mit mindestens einer Barre
EP1600543B1 (fr) * 2004-05-27 2008-04-09 KARL MAYER TEXTILMASCHINENFABRIK GmbH Barre pour éléments de tricotage à mailles jetées

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4111108A1 (de) * 1991-04-05 1992-10-08 Erbsloeh Julius & August Als geschlossenes hohlprofil aus verstaerktem kunststoff ausgebildeter traeger
DE20314470U1 (de) * 2003-09-18 2003-11-20 KARL MAYER Malimo Textilmaschinenfabrik GmbH, 09117 Chemnitz Barre aus faserverstärktem Kunststoff-Hohlprofil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104131409A (zh) * 2014-07-12 2014-11-05 常德纺织机械有限公司 一种经编机的成圈工具

Also Published As

Publication number Publication date
CN101046031A (zh) 2007-10-03
DE102006014147A1 (de) 2007-10-11
CN101046031B (zh) 2010-09-01
DE102006014147B4 (de) 2008-01-24
KR20070097359A (ko) 2007-10-04
KR100881441B1 (ko) 2009-02-06
TWI320435B (en) 2010-02-11
TW200736434A (en) 2007-10-01

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