EP0288652A1 - Schaftstab für Webmaschine - Google Patents

Schaftstab für Webmaschine Download PDF

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Publication number
EP0288652A1
EP0288652A1 EP87870056A EP87870056A EP0288652A1 EP 0288652 A1 EP0288652 A1 EP 0288652A1 EP 87870056 A EP87870056 A EP 87870056A EP 87870056 A EP87870056 A EP 87870056A EP 0288652 A1 EP0288652 A1 EP 0288652A1
Authority
EP
European Patent Office
Prior art keywords
zone
edge
reinforced
middle zone
fibers
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.)
Ceased
Application number
EP87870056A
Other languages
English (en)
French (fr)
Inventor
Daniel Blontrock
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.)
Verbrugge NV
Original Assignee
Verbrugge NV
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 Verbrugge NV filed Critical Verbrugge NV
Priority to EP87870056A priority Critical patent/EP0288652A1/de
Priority to US07/183,560 priority patent/US4844130A/en
Priority to JP63102814A priority patent/JPS63282334A/ja
Publication of EP0288652A1 publication Critical patent/EP0288652A1/de
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0608—Construction of frame parts
    • D03C9/0616—Horizontal upper or lower rods
    • D03C9/0625—Composition or used material
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0608—Construction of frame parts
    • D03C9/0616—Horizontal upper or lower rods
    • D03C9/0633—Heald bars or their connection to other frame parts

Definitions

  • the present invention relates to a cross member for a loom blade comprising, in its longitudinal direction, two edge zones separated from each other by a middle zone, one of the edge zones being reinforced in the longitudinal direction of the crossmember by a material containing a fiber reinforcement, the other edge zone, essentially of metal, carrying a hitch attachment bar and possibly having at least one slot which extends at least partially opposite this bar.
  • the invention aims to propose a relatively light weaving loom blade while being very solid and rigid, so as to be suitable for high speed weaving looms, in which the blades are subjected to very large accelerations. back and forth.
  • Another object of the present invention is a cross member for a weaving loom blade with high construction precision, in particular with regard to the linearity of the hitch attachment bar.
  • this median zone when the median zone forms a whole with said other edge zone and is therefore at least partially of the same metal as at least part of this other edge zone, this median zone comprises a plate or a metal frame, while, when the median zone is made up of a part separate from this other edge zone and is fixed to the latter by gluing or molding, this median zone is essentially formed of a material reinforced by fibers and this in such a way that tensions in the middle zone forming an angle of the order of 45 ° with the longitudinal direction of the cross-member can be absorbed.
  • this central zone when the central zone is essentially constituted by a metal plate, this central zone comprises at least one layer of a relatively light sound-absorbing material, which is fixed as reinforcement of this plate laterally against at least one of the large longitudinal faces of the latter , and, when the middle zone consists essentially of a metal frame having edges between which are formed openings, at least these openings are closed by a noise-absorbing material.
  • a connecting member having a cross section having the appearance of a fork is provided between said other edge zone and the edge adjacent to this zone of the middle zone thus making it possible to fix these two zones to each other by gluing or molding and optionally by clamping.
  • the invention aims to propose a cross member for a very light loom blade while being of a rigid, solid and very precise construction, which is obtained by a combination and a judicious choice of different materials well specific.
  • Figures 1 and 2 relate to a first embodiment of such a cross meets the conditions of lightness, rigidity and precision required according to the invention.
  • This cross member comprises, in its longitudinal direction, two edge zones 1 and 2, separated from each other by a middle zone 3.
  • One of the edge zones 1 is constituted by a U-shaped profile, obtained by pultrusion of carbon fibers impregnated with an epoxy resin for example, the wings of which extend on either side of the adjacent edge 4 of the middle zone 3 and are stuck on the latter.
  • the other edge zone 2 made of aluminum, carries a steel bar 5 for hanging beams, not shown. to the figures.
  • This bar extends parallel to the longitudinal axis of the cross-member and can be screwed, riveted and / or be glued to one of the faces of this edge zone 2.
  • the central zone 3 comprises a continuous aluminum plate 6, which forms a whole with the edge zone 2.
  • a layer 7 of a relatively light material, absorbing noise, is glued or molded, as reinforcement of this plate 6, laterally against each of the large longitudinal faces of the latter.
  • This layer 7 can be formed by a plastic material, such as polyester, epoxy resin or polyurethane, reinforced by glass, carbon or other fibers, oriented in such a way that the tensions created in the middle zone 3 and forming an angle of 45 ° with the longitudinal direction of the crosspiece can be absorbed by these fibers.
  • a plastic material such as polyester, epoxy resin or polyurethane, reinforced by glass, carbon or other fibers
  • this layer of reinforced plastic material 7 and the plate 6 a layer of foam, for example of polyurethane, polyether or latex, which therefore essentially has the function of damping noise.
  • This foam could thus fill the recesses formed on either side of the plate 6 between the projecting U-shaped profile forming the edge zone 1, on the one hand, and the edge zone 2 separated in particular by a rib 8 from the middle zone 3, on the other hand.
  • the material reinforced by fibers could also extend externally against the profile of the edge zone 1 and partially over the edge zone 2, as shown diagrammatically in broken lines in FIG. 2.
  • a series of slots 9 are preferably formed in the edge zone 2, partially opposite the attachment bar 5 for the beams, in order to allow the evacuation of dust between this bar and the edge zone 2 and more easily replace the beams.
  • the layers of synthetic materials 7 reinforced with fibers below which foam layers may be provided could simply be omitted.
  • the embodiment of the crosspiece, according to the invention, shown in Figures 3 and 4 is essentially different from that of Figures 1 and 2 by the fact that the middle zone 3 is formed of an aluminum frame, more particularly by an openwork plate, so as to have edges 10 between which are formed openings 11. These edges extend at an angle of 45 ° relative to the longitudinal axis of the cross member thereby delimiting openings having substantially the look of right triangles.
  • these openings 11 are closed by a material 7 which dampens noise and which makes it possible, moreover, to increase the rigidity of the cross member and to avoid buckling of the edges 10.
  • This material is formed from two layers superimposed extending on either side of the frame 6, glued one on the other and on this frame.
  • This material 7 is more particularly constituted by a layer of rigid foam 7 ′, made of polyurethane for example, bonded to the two external faces of the framework 6, in the recesses formed between the projecting parts of zones 1 and 2 and of a layer of a plastic material 7 ⁇ , such as epoxy resin or polyester, reinforced with glass fibers, carbon or the like, simply glued against the lateral faces of the profile 1, of the layer of foam 7 ′ and d 'part of the edge area 2.
  • a layer of rigid foam 7 ′ made of polyurethane for example
  • Figures 5 and 6 relate to an embodiment of the cross member, according to the invention, which differs essentially from that shown in Figures 3 and 4 by the fact that the frame is formed of a tubular profile of rectangular section openwork.
  • the middle zone 3 includes edges 10 ′ and 10 ⁇ which are arranged in parallel planes extending at a certain distance from each other.
  • the space provided between these two series of edges 10 ′ and 10 ⁇ is filled with a foam, for example of rigid polyurethane, allowing on the one hand, to improve the damping against noise and, on the other hand, to give the crossmember a certain additional rigidity.
  • zone 1 is formed by a prismatic rod reinforced with carbon fibers, obtained by pultrusion, which is maintained by bonding between the wings 1 ′ and 1 ⁇ , provided on the longitudinal edge 4 of the median zone 3 opposite to that having the edge zone 2 and lying in the planes of the edges 10 ′ and 10 ⁇ .
  • the crosspiece according to the embodiment shown in FIGS. 7 and 8 differs essentially from all the previous embodiments by the fact that the middle zone 3 no longer contains an aluminum part but is entirely made of a plastic material reinforced by glass fibers, carbon fibers or the like with a thickness of at most 2 mm.
  • At least an essential part of these fibers extend at an angle of the order of 45 ° with the longitudinal axis of the cross-member and are substantially continuous over the entire height of this median zone, so as to allow the absorption of the transverse tensions which can occur in this median zone when mounted in a loom blade.
  • Part of these fibers 10 have been shown diagrammatically in FIG. 7.
  • These fibers can be glass, carbon or similar fibers and are arranged in at least three layers joined together and this so that an essential part of the fibers of the middle layer form an angle of the order of 90 ° with an essential part of the fibers of the adjacent layers.
  • Each of these layers can consist of continuous fibers impregnated with resin and obtained by pultrusion. In other cases, each of the layers may consist of a fabric of cross fibers of carbon, glass or the like.
  • the middle zone 3 is entirely made of a hard plastic material reinforced by substantially continuous fibers of glass, carbon or the like, is that the edge zone 2, which is, according to the invention, still made of metal and in particular aluminum, is bonded by its longitudinal edge 12 adjacent to this zone 2.
  • the latter advantageously has a connecting member 13 having a section in the shape of a fork, so as to thus form a slot in which is then engaged and glued this adjacent edge 12 of the middle zone 3.
  • a certain clearance 14 can be provided between the bottom of the slot delimited by the fork 13 and the aforementioned edge 12 of the middle zone 3, in order to be able to thus compensate, during the bonding of this edge in the fork, a possible bending of the middle zone 3.
  • this middle zone 3 is made of a plastic material, during the hardening of this material, a certain deformation of this zone can occur which will result in the edge 12 not being more perfectly straight.
  • the fact that the zone 2 is made of aluminum poses no problem for keeping the bar 5 perfectly straight, despite the fact that initially the edge 12 would not be entirely straight.
  • the edge zone 1 can also be formed by a profile obtained by pultrusion and containing carbon fibers impregnated with a resin and extending in the longitudinal direction of this profile .
  • FIG. 9 represents a slight variant of the embodiment of FIGS. 7 and 8 by the fact that zone 1 forms a whole with the middle zone 3 and is therefore obtained simultaneously with this zone 3.
  • the middle zone 3 comprises, on the one hand, a three-dimensional fabric having in fact two arrays of threads arranged in two parallel planes connected between them by strands of threads 15 substantially perpendicular to these two networks and distributed substantially uniformly in the space separating the latter and, on the other hand, a foam, for example of hard polyurethane or epoxy, filling the space between the networks and also enveloping the latter, way to delimit this space with a layer of this foam in which the networks constitute a frame.
  • a foam for example of hard polyurethane or epoxy
  • a median zone 3 is obtained, the lateral walls 7 ⁇ of which are formed by a layer of a plastic material reinforced with woven fibers, thus making it possible to absorb the transverse tensions which may occur in this zone, and the core 7 ′ is formed, on the one hand, of strands of son 15 which connect the side walls 7 ⁇ and, on the other hand, of a hard foam giving this zone the required rigidity.
  • the edge zone 1 is essentially constituted by a rod manufactured by pultrusion made of carbon fibers embedded in an appropriate resin.
  • a similar strip extends on the opposite side with respect to the central zone 3 and forms the edge 12 of the latter which is glued in the connecting member 13 of the edge zone 2 in the same way as in the embodiment shown in Figures 8 and 9.
  • the joining of these two rods with the body of the middle zone 3 is advantageously carried out by first threading them into the lateral edges of a strip of the aforementioned three-dimensional fabric, between the two networks of the latter, and then placing the together in a mold into which a reaction mixture of plastic material is injected, between the two networks of the fabric, so as to separate these networks from one another and to stretch them along the interior walls of the mold, during foaming of the reactive mixture, while simultaneously enveloping the two rods with said foam.
  • the middle zone 3 comprises a core having a honeycomb-shaped structure, made of very thin aluminum, the two longitudinal faces of which are covered by layers of a plastic material reinforced by carbon fibers, glass fibers or the like, for example in the two embodiments shown in FIGS. 3 to 6.
  • the joining of these layers of plastic material with the honeycomb core can be achieved by hardening this material on the core even in a suitable mold.
  • the edge zone opposite to that carrying the hitch attachment bar, can be constituted by a rod made of carbon fibers embedded in a resin, while a rod substantially similar can be provided at the edge of the central zone fixed to the zone carrying the above-mentioned bar.
  • These two rods can thus be secured to the honeycomb core in said mold by enveloping them, in the same way as this core, by the reinforced plastic material.
  • the plastic material reinforced with fibers advantageously has a very high elastic modulus and a light specific weight.
  • This elastic modulus is advantageously equal to or greater than 180,000 N / mm2 and is preferably of the order of 190,000 N / mm2.
  • preference has been given to a reinforcement formed by carbon fibers of the "UD-high modulus - 190,000 N / mm2" type whose specific weight is of the order of 1 , 6 to 1.7.
  • the design of the crosspiece according to the invention has made it possible to obtain crosspieces for loom blades which are 30 to 35% lighter than known conventional crosspieces, and to obtain an increase in the rigidity of the crosspieces d '' at least 60%.
  • the connecting member 13 can be part of the middle zone instead of zone 2.
  • the central zone made of reinforced plastic could be fixed on the edge zone 3 made of metal by molding this plastic material directly on the edge zone 3.
  • the latter could moreover, in yet another variant, being only partially made of metal, in particular at the place having the slots 9 or being made of a thin metal plate which would be embedded in resin and which would possibly be directly molded or glued to the middle zone 3.
  • edge zone 1 and the part of the central zone 3 adjacent to this zone 1 could be curved in the form of a vault, in particular when the central zone 3 is constituted by a perforated metal plate or no, as in the embodiments of FIGS. 1 to 4, so as to be able to better resist the bending forces.
EP87870056A 1987-04-28 1987-04-28 Schaftstab für Webmaschine Ceased EP0288652A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP87870056A EP0288652A1 (de) 1987-04-28 1987-04-28 Schaftstab für Webmaschine
US07/183,560 US4844130A (en) 1987-04-28 1988-04-19 Weaving loom blade crossbeam
JP63102814A JPS63282334A (ja) 1987-04-28 1988-04-27 織機ブレード横棒

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87870056A EP0288652A1 (de) 1987-04-28 1987-04-28 Schaftstab für Webmaschine

Publications (1)

Publication Number Publication Date
EP0288652A1 true EP0288652A1 (de) 1988-11-02

Family

ID=8198499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87870056A Ceased EP0288652A1 (de) 1987-04-28 1987-04-28 Schaftstab für Webmaschine

Country Status (3)

Country Link
US (1) US4844130A (de)
EP (1) EP0288652A1 (de)
JP (1) JPS63282334A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496054A1 (de) * 1991-01-19 1992-07-29 GROB & CO. AKTIENGESELLSCHAFT Schaftstab für einen Webschaft
WO2001032967A1 (en) * 1999-11-04 2001-05-10 Vúts Liberec A.S. Shaft rod of a heald frame of a weaving machine with a support for heald holder
DE10153729A1 (de) * 2001-10-31 2003-05-15 Grob Horgen Ag Horgen Tragkörper für einen Webschaft
DE102005044474B3 (de) * 2005-09-16 2007-01-04 Groz-Beckert Kg Schaftstab und Webschaft
EP1953277A1 (de) 2007-02-01 2008-08-06 Groz-Beckert KG Schaftstab für Webschäfte
CN101387027B (zh) * 2007-09-11 2011-12-14 格罗兹-贝克特公司 粘接综片安装轨道

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1239916B (it) * 1990-05-15 1993-11-23 Elio Carrara Licciruolo per quadri licci in materiali compositi
DE102004059319A1 (de) * 2004-12-02 2006-06-08 Picanol N.V. Webschaft
BE1017334A3 (nl) * 2006-10-05 2008-06-03 Picanol Nv Weefkader met versterkingsprofiel voor een weefmachine.
DE102006057833B3 (de) * 2006-12-08 2008-09-04 Groz-Beckert Kg Schaftstab für einen Webschaft
SE533266C2 (sv) * 2008-12-16 2010-08-03 Texo Ab Vävmaskin med modulariserad drivning
IT201900008379A1 (it) * 2019-06-07 2020-12-07 Itema Spa Traversa di quadro-liccio per telai di tessitura a rigidita' migliorata

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2312923A7 (fr) * 1975-05-27 1976-12-24 Egelhaaf C C Lamette de tissage
DE2620778A1 (de) * 1976-04-08 1977-10-20 Sulzer Ag Webschaft
US4484604A (en) * 1983-09-06 1984-11-27 Steel Heddle Mfg. Co. Composite dual-face heddle frame slat
US4503890A (en) * 1983-04-13 1985-03-12 Steel Heddle Mfg. Co. Releasable heddle rod connector
US4633916A (en) * 1985-06-24 1987-01-06 Rast John L Roll-formed shear-resistant frame slat

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH488035A (de) * 1967-12-22 1970-03-31 Froehlich Ag E Tragstab für Webschäfte
JPS5642378Y2 (de) * 1979-02-14 1981-10-03
JPS5715210A (en) * 1980-06-30 1982-01-26 Toshiba Corp Vertical magnetization type magnetic head

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2312923A7 (fr) * 1975-05-27 1976-12-24 Egelhaaf C C Lamette de tissage
DE2620778A1 (de) * 1976-04-08 1977-10-20 Sulzer Ag Webschaft
US4503890A (en) * 1983-04-13 1985-03-12 Steel Heddle Mfg. Co. Releasable heddle rod connector
US4484604A (en) * 1983-09-06 1984-11-27 Steel Heddle Mfg. Co. Composite dual-face heddle frame slat
US4633916A (en) * 1985-06-24 1987-01-06 Rast John L Roll-formed shear-resistant frame slat

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496054A1 (de) * 1991-01-19 1992-07-29 GROB & CO. AKTIENGESELLSCHAFT Schaftstab für einen Webschaft
WO2001032967A1 (en) * 1999-11-04 2001-05-10 Vúts Liberec A.S. Shaft rod of a heald frame of a weaving machine with a support for heald holder
DE10153729A1 (de) * 2001-10-31 2003-05-15 Grob Horgen Ag Horgen Tragkörper für einen Webschaft
US6994123B2 (en) 2001-10-31 2006-02-07 Grob Horgen Ag Support element for a heddle frame
DE10153729B4 (de) * 2001-10-31 2013-09-12 Grob Textile Ag Tragkörper für einen Webschaft
DE102005044474B3 (de) * 2005-09-16 2007-01-04 Groz-Beckert Kg Schaftstab und Webschaft
US7823608B2 (en) 2005-09-16 2010-11-02 Groz-Beckert Kg Shaft rod and heald shaft
EP1953277A1 (de) 2007-02-01 2008-08-06 Groz-Beckert KG Schaftstab für Webschäfte
CN101387027B (zh) * 2007-09-11 2011-12-14 格罗兹-贝克特公司 粘接综片安装轨道

Also Published As

Publication number Publication date
US4844130A (en) 1989-07-04
JPS63282334A (ja) 1988-11-18

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Inventor name: BLONTROCK, DANIEL