EP0719881A1 - Outil de tricotage étampé pour des machines textiles notamment pour des machines à tricoter - Google Patents

Outil de tricotage étampé pour des machines textiles notamment pour des machines à tricoter Download PDF

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Publication number
EP0719881A1
EP0719881A1 EP95115914A EP95115914A EP0719881A1 EP 0719881 A1 EP0719881 A1 EP 0719881A1 EP 95115914 A EP95115914 A EP 95115914A EP 95115914 A EP95115914 A EP 95115914A EP 0719881 A1 EP0719881 A1 EP 0719881A1
Authority
EP
European Patent Office
Prior art keywords
shaft
knitting
free space
areas
knitting tool
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.)
Granted
Application number
EP95115914A
Other languages
German (de)
English (en)
Other versions
EP0719881B1 (fr
Inventor
Erich Braun
Albert Teufel
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.)
Groz Beckert KG
Original Assignee
Theodor Groz and Soehne and Ernst Beckert Nadelfabrik 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 Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG filed Critical Theodor Groz and Soehne and Ernst Beckert Nadelfabrik KG
Publication of EP0719881A1 publication Critical patent/EP0719881A1/fr
Application granted granted Critical
Publication of EP0719881B1 publication Critical patent/EP0719881B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00

Definitions

  • the invention relates to a punched knitting tool for textile machines, in particular knitting or knitting machines, with a shaft which carries at least one foot and in which at least one space is formed, which is filled with a heterogeneous material, in particular a plastic, which is firmly attached to the Shaft is connected.
  • Knitting tools are to be understood here as tongue needles, point needles, slide needles, needles without tongues, for example plush hooks for the manufacture of plush goods as well as sinkers and the like.
  • a punched knitting tool of the type mentioned is known, in the shaft at least one free space is arranged, which is designed in the form of an elongated hole, the longitudinal axis of which is aligned parallel or coaxially to the longitudinal axis of the shaft.
  • This slot is through two of the Upper vertical edge of the upper edge of the shaft is bounded by vertical guide parts and two narrow webs connecting them, which are arranged parallel to one another.
  • the free space is filled with a vibration-damping material that is firmly connected to the needle shaft.
  • This vibration-damping material is usually an elastic plastic material with high damping properties, but the use of other materials is not excluded. Embodiments with one or more such free spaces completely enclosed by the webs and the guide parts are described.
  • the vibration behavior of the knitting tools is advantageously influenced by the vibration-damping material contained in the respective free space. It is possible to dissolve the knitting tools into a highly elastic structure with web heights of at most 1.1 mm and to use the knitting tools over long periods of operation at high working speed, without causing web breaks as a result of material fatigue or broken hooks to any significant extent.
  • the object of the invention is therefore to remedy this and to create a knitting tool of the type described, in which, with simplified manufacture, a perfect anchoring of the heterogeneous material filling the respective free space in the shaft is ensured on the shaft.
  • the knitting tool according to the invention has the features of claim 1.
  • the shaft is beveled at least in places along the edge of the free space towards the free space, the beveled areas projecting into the heterogeneous material filling the free space.
  • the bevel on the edge of the free space results in a secure external anchoring of the material filling the free space, in particular plastic.
  • the chamfered areas can in particular be embossed into the shaft, which can be done with the aid of a simple, inexpensive stamp which has a long service life. Since the displaced material flows towards the free space during the embossing process, the unembossed shaft areas are not affected by the embossing process. This is particularly important if the space to the upper and / or lower edge of the shaft is limited by webs of low height, the cross-section of which is retained.
  • the beveled areas are delimited towards the free space by a fillet, which, as the second internal positive locking anchoring of the material filling of the free space, provides additional hold.
  • This fillet is generated automatically during the stamping process because the shaft material is pushed inwards towards the free space.
  • the fillet is produced differently, for example by machining or by means of an infiltration.
  • the chamfered areas advantageously have an essentially identical chamfer angle on both shaft sides, but embodiments are also conceivable in which, for special reasons, different chamfer angles are provided or a chamfer is only arranged on one shaft side.
  • the chamfered areas can be locally limited along the outline of the free space or extend around the closed outline of the free space.
  • the shank of which is Is designed with at least one free space in the form of an elongated hole, which is bounded towards the upper and lower edge of the shaft by a web of low height
  • the arrangement should be such that there are bevelled areas on the webs.
  • the parts of the free space outline which connect the two webs at the end face to one another, as a rule semicircularly curved, can, in certain embodiments, at least partially also be left without bevels, ie unprocessed, if this appears expedient in view of a favorable stress distribution in the shaft material.
  • the chamfered areas also extend entirely over these curved outline parts of the free space.
  • the latch needle shown in FIGS. 1, 2 has a needle shaft 1, which is usually punched out of strip steel and has two molded feet 2 on its upper side and to which a needle head 3 with the needle hook 4 is connected on one side.
  • the needle tongue cooperating with the needle hook 4 is indicated at 5.
  • each of which forms a free space which is filled with a heterogeneous material 8 in the manner shown in FIGS. 6, 7.
  • the heterogeneous material is firmly connected to the shaft 1 along the edge of each elongated hole 6. It usually consists of a plastic, preferably a polyamide-12, polynrethane, polyethylene or polytetrafluoroethylene or the like, but in principle this also means non-organic substances, for example of a metallic type.
  • Each elongated hole 6 is delimited on its long sides by two mutually parallel webs 9, 10 and on the end face by two guide parts 13 extending from the upper edge 11 of the shaft to the lower edge 12 of the shaft. Each foot 2 is supported by one of the guide parts 13.
  • the two webs 9, 10 lying on the upper needle shaft edge 11 and on the lower needle shaft edge 12 have a low height of preferably approximately 1.1 mm and less. Their length is advantageously more than 8 mm.
  • the outline of each elongated hole 6 is thus limited to the long sides adjoining the two webs 9, 10 by essentially straight lines 14, 15, which are formed by two semicircular curved lines 16, 17 are connected to one another, of which the associated radius is indicated at 18 in FIG. 3.
  • the shaft 1 is tapered inwards towards the free space, as can be seen in particular from FIGS. 3 to 5.
  • the narrow, strip-shaped, beveled areas are designated 19, 20. They lie on both sides of the shaft 1 and have essentially the same bevel angle 21, which is 35 ° in the exemplary embodiment shown. It can also be selected differently depending on the shaft thickness 22 and the type of material filling 8 used as well as the conditions of use and conditions of the knitting tool. It is preferably in a range of approximately 10 to 80 °.
  • the bevel angles 21 can also have different sizes on both sides of the shaft 1, which should be pointed out for the sake of order.
  • the bevels 19, 20 in the illustrated embodiment extend in the form of a wedge in each case towards the longitudinal median plane of the shaft 1 indicated at 23 in FIG. 4 and lie with their (imaginary) apex line on this median plane. Embodiments are also possible in which this (imaginary) apex line is offset on one or the other side with respect to the longitudinal center plane 23.
  • the beveled areas 19, 20, which in the present case are of equal width, can also have a width that is different from one another.
  • the beveled region 19 extends on both sides of the shaft substantially over the length of the two straight contour lines 14, 15 of the elongated hole 6 and the semicircular curved contour line 17 of the elongated hole 6 connecting them, which extends in close to foot 2.
  • the beveled area 19 ends on both sides of the shaft at 25 in the axial direction somewhat in front of the area in which the straight outline 14 or 15 merges into the semicircular curved outline 16.
  • the tapered area 20 extends then on both sides of the shaft over part of the semicircular curved line 16, wherein it is arranged symmetrically to the longitudinal axis indicated at 26.
  • the equally shaped, beveled areas 19, 20 lying on both sides of the shaft 1 are each delimited towards the free space by a fillet 27, which is arranged symmetrically to the longitudinal center plane 23.
  • each elongated hole 6 is, as already mentioned, injection molded with vibration-damping plastic material 8, which, as can be seen from FIG. 7, is flush with the two shaft side walls.
  • the beveled areas 19, 20 and the fillet 27 protrude into the material filling 8 and thus result in a form-fitting anchoring for the plastic adhering to the slot edge.
  • the fillets 27 form an additional second anchoring means.
  • preformed plastic parts are pressed into the elongated holes 6 and anchored therein in a form-fitting manner at the edge.
  • the chamfers in the chamfered areas 19, 20 are stamped on the shaft 1.
  • an embossing stamp indicated at 28 in FIG. 4 is used, the length of which is matched to the respective elongated hole 6 and partially corresponding to the beveled areas 19, 20 has circumferential bevels 29.
  • the shaft material is pushed inwards on the outline of the elongated hole 6, the groove 27 being formed at the same time.
  • the chamfered areas 19, 20, which practically enclose the entire contour of the elongated hole 6, provide excellent anchoring of the plastic 8, preventing local breaking out.
  • the cross section of the two webs 9, 10 is retained during the embossing process and offers no approach to break points.
  • the latch needle thus has a very low coefficient of friction in the needle channel of the associated needle bed.
  • the chamfered area 19 extends over the entire closed outline of the free space delimited by the elongated hole 6.
  • the semicircular contour line 16 or 17 which is indicated by dashed lines in FIG. 9 for comparison, which connects the two straight contour lines 14, 15 on the front side, is replaced by an essentially partially elliptical contour line 17a , which transitions into the straight outline 14, 15 without a paragraph.
  • This configuration results in a better stress distribution in the region of the front ends of the free spaces when the latch needle is loaded, which contributes to the fact that the ends of the webs 9, 10 experience a gentler change in cross-section at the transition into the elliptical contour lines 17a.
  • Contour lines 17a which are partially elliptically curved can be provided on each end face for each elongated hole 6, but it is often sufficient to design only one end face accordingly, while the part-circular outline line 17 is used on the other end face.
  • the partially elliptical outline 17a can face a foot 2 or the needle head 3 (FIG. 1).
EP95115914A 1994-12-02 1995-10-10 Outil de tricotage étampé pour des machines textiles notamment pour des machines à tricoter Expired - Lifetime EP0719881B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4442943A DE4442943C1 (de) 1994-12-02 1994-12-02 Gestanztes Strickwerkzeug für Textilmaschinen, insbesondere Wirk- oder Strickmaschinen
DE4442943 1994-12-02

Publications (2)

Publication Number Publication Date
EP0719881A1 true EP0719881A1 (fr) 1996-07-03
EP0719881B1 EP0719881B1 (fr) 1999-09-29

Family

ID=6534743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115914A Expired - Lifetime EP0719881B1 (fr) 1994-12-02 1995-10-10 Outil de tricotage étampé pour des machines textiles notamment pour des machines à tricoter

Country Status (5)

Country Link
US (1) US5582038A (fr)
EP (1) EP0719881B1 (fr)
JP (1) JP2831604B2 (fr)
CA (1) CA2163729C (fr)
DE (2) DE4442943C1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644166C1 (de) * 1996-10-24 1997-11-20 Groz Beckert Kg Strickwerkzeug für Textilmaschinen und Herstellungsverfahren für dieses
DE19729145C1 (de) * 1997-07-08 1999-01-07 Groz Beckert Kg Gestanztes Strickwerkzeug für Textilmaschinen, insbesondere für Strick- und Wirkmaschinen
EP2045384B1 (fr) * 2007-10-02 2012-08-22 Groz-Beckert KG Aiguille pour un métier à mailles jetées
DE102014002790A1 (de) 2014-03-19 2015-09-24 Mark André Pfeffer Hybrid Werkstoff Komponenten Maschinenstricknadel
DE102015010016A1 (de) 2015-11-10 2017-05-11 Mark Pfeffer Maschenbildende Nadel
RS64523B1 (sr) * 2018-05-30 2023-09-29 Groz Beckert Kg Kočioni element za kočenje pomeranja pletaćeg elementa, pletaći element, nosač pletaćeg elementa, uređaj za pletenje i modularni sistem za uređaj za pletenje

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314809A1 (de) 1983-04-23 1984-10-31 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt Gestanztes strickwerkzeug fuer strick- oder wirkmaschinen
EP0282647A1 (fr) * 1987-03-04 1988-09-21 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik Commandit-Gesellschaft Outil de tricotage étampé pour des machines textiles, notamment pour des machines à tricoter
EP0375843A1 (fr) * 1988-12-23 1990-07-04 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik Commandit-Gesellschaft Outil de tricotage étampé pour des machines textiles notamment pour des machines à tricoter
EP0426994A1 (fr) * 1989-11-10 1991-05-15 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik Commandit-Gesellschaft Organe de tricotage estampé pour machines textiles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2003942B (en) * 1977-06-28 1982-01-27 Needle Industries Ltd Latched needles
DE3014751C2 (de) * 1980-04-17 1982-06-16 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt Gestanztes Strickwerkzeug für Strick- oder Wirkmaschinen
DE8706530U1 (fr) * 1987-05-07 1987-06-25 Theodor Groz & Soehne & Ernst Beckert Nadelfabrik Kg, 7470 Albstadt, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314809A1 (de) 1983-04-23 1984-10-31 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt Gestanztes strickwerkzeug fuer strick- oder wirkmaschinen
EP0282647A1 (fr) * 1987-03-04 1988-09-21 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik Commandit-Gesellschaft Outil de tricotage étampé pour des machines textiles, notamment pour des machines à tricoter
EP0375843A1 (fr) * 1988-12-23 1990-07-04 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik Commandit-Gesellschaft Outil de tricotage étampé pour des machines textiles notamment pour des machines à tricoter
EP0426994A1 (fr) * 1989-11-10 1991-05-15 Theodor Groz & Söhne & Ernst Beckert Nadelfabrik Commandit-Gesellschaft Organe de tricotage estampé pour machines textiles

Also Published As

Publication number Publication date
DE59506949D1 (de) 1999-11-04
EP0719881B1 (fr) 1999-09-29
CA2163729C (fr) 1999-02-09
JPH08209511A (ja) 1996-08-13
CA2163729A1 (fr) 1996-06-03
US5582038A (en) 1996-12-10
DE4442943C1 (de) 1996-05-15
JP2831604B2 (ja) 1998-12-02

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