WO2008074268A2 - Procédé de tissage avec une croisure accrue de chaîne et métier à tisser pour effectuer le procédé - Google Patents

Procédé de tissage avec une croisure accrue de chaîne et métier à tisser pour effectuer le procédé Download PDF

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Publication number
WO2008074268A2
WO2008074268A2 PCT/CZ2007/000112 CZ2007000112W WO2008074268A2 WO 2008074268 A2 WO2008074268 A2 WO 2008074268A2 CZ 2007000112 W CZ2007000112 W CZ 2007000112W WO 2008074268 A2 WO2008074268 A2 WO 2008074268A2
Authority
WO
WIPO (PCT)
Prior art keywords
weaving
sector
warp
shed
warp threads
Prior art date
Application number
PCT/CZ2007/000112
Other languages
English (en)
Other versions
WO2008074268A3 (fr
Inventor
Josef Dvorak
Original Assignee
Vyzkumny Ustav Textilnich Stroju Liberec A.S.
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 Vyzkumny Ustav Textilnich Stroju Liberec A.S. filed Critical Vyzkumny Ustav Textilnich Stroju Liberec A.S.
Priority to EP07855987A priority Critical patent/EP2099965B1/fr
Priority to DE602007012937T priority patent/DE602007012937D1/de
Priority to AT07855987T priority patent/ATE500364T1/de
Publication of WO2008074268A2 publication Critical patent/WO2008074268A2/fr
Publication of WO2008074268A3 publication Critical patent/WO2008074268A3/fr

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for

Definitions

  • the invention relates to the weaving method with increased crossing of warp.
  • the invention further relates to the weaving loom for weaving with increased crossing of warp comprising the warp beam with package of warp threads, device for shed creating, loose weaving reed, device for inserting of weft into shed and cloth roller for winding of fabric.
  • Forming of the fabric is a force process, in result of which the inserted weft pushes into the wedge spacing between the pre-stressed warp threads and it is crossed by warp threads until the required interlacing structure is achieved.
  • the resistance of warp threads against deformation must be overcome (wave and elongation of thread elements) as well as the frictional resistance among the threads. Collectively these forces are called weaving resistance. This resistance must be overcome by an active force, usually by a beating force, which is created by mutual acting of weaving reed and fabric face due to drawing of the system fabric - warp.
  • the drag force is acting, whose value is proportional to the value of nominal axial force in the thread and value of crossing angle.
  • This angle depending on the sett and thread fineness, may reach the values up to 60°.
  • the crossing angle is nearly zero and also in the phase of maximum opening of the shed, it reaches the values less than 15°.
  • the weft is being pushed out from the fabric as a result of unbalanced elastic forces in the fabric and warp.
  • the only and not always effective means to overcome the weaving resistance and weaving-in the weft are the beating force and friction between threads.
  • Literature discloses a theory, that the possible way for inducing a force effect upon the weft during its forcing into warp threads is so called excessive crossing of warp threads.
  • the basic force in warp threads may thanks to distribution in force polygon create a component, which overcomes the weaving resistance and will form the fabric.
  • the pressure force will obtain the values which are similar to the beating force.
  • the weaving reed may have a lower lifting, because the area for weft insertion thanks to opening of warp may occur close to beating point. Reduction in dimensions of weaving reed means reduction of weight upon preserving or increasing its rigidity.
  • the goal of the invention is to enable a practical utilisation of the weaving theory with increased warp crossing.
  • the principle of invention has been reached through the weaving method with increased crossing of warp, whose principle consists in that the shed for one working cycle is produced in two synchronised sectors, out of which in the first, pulse sector, the warp threads are separated into branches according to the specified pattern of weaving, and in the second, force sector, an increased crossing of warp branches separated in the pulse sector is performed, through which overcoming of weaving resistance is achieved and a space for weft insertion is created, while the activity in both sectors runs continuously and mutually synchronised.
  • the principle of weaving loom for weaving with increased warp crossing consists in that, the shedding mechanism comprises a device of pulse sector for separation of warp threads into branches, and device of the force sector for performance of increased crossing of warp, while both devices are driven synchronously.
  • This machine enables weaving with increased crossing of the warp.
  • the invention is schematically shown in the drawing, where the Fig. 1 represents one exemplary embodiment of weaving loom for weaving with increased crossing of warp, the Fig. 2 another exemplary embodiment of weaving loom for weaving with increased crossing of warp, the Fig. 3 exemplary embodiment of gripper for realisation of second phase of shed with increased crossing of warp, and the Fig. 4 represents schematic arrangement of the shed according to the invention.
  • the weaving method with increased crossing of warp is such, that creating of shed for each working cycle of weaving loom is divided into two sectors IZ, SZ, out of which in the first sector, which in further text will be designated as pulse sector IZ, a separation of warp threads into branches according to the specified weaving pattern is performed, and in the second sector, which in further text will be designated as force sector SZ, an increased crossing into branches of separated warp threads is performed, at the same time the activity in both sectors IZ, SZ is running constantly and mutually synchronously.
  • Angle of opening of threads in pulse sector IZ in example of embodiment represented in the Fig.
  • weaving loom for weaving with increased crossing of warp will be described on an example of embodiment of several weaving looms, which comprise some identical or similar assemblies and some different assemblies. Arrangement of weaving loom is known for a specialist, so individual parts of the machine, which are not directly connected with the present invention, will not be described.
  • the represented weaving loom comprises pulse sector
  • the device forming the pulse sector IZ is formed by another suitable device for separation of warp threads into branches according to the prescribed pattern of weaving, e.g. it is formed by non-conventional separation or shedding mechanism of suitable parameters.
  • a weaving loom will be used whose pulse sector IZ is formed by a shaft shedding mechanism, while for an average specialist the adaptation of invention to the weaving loom with cam shedding mechanism means a common engineering practice, same as adaptation of invention to the future types of conventional or unconventional shedding mechanism or device for separation of warp threads into branches.
  • the device with pulse sector ]Z realises constantly the required lifting function with desired frequency and phase.
  • the weaving loom with pulse sector IZ formed by shaft shedding mechanism comprises a system of weaving shafts 2, whose straight-lined reversible motion is secured by a shedding mechanism, as a rule by a cam shedding mechanism, whose activity is controlled by a controlling device.
  • the weaving shafts are in a known manner provided with healds ⁇ , Y_, which comprise the known eyelets Ia, Ia ⁇ , through which the warp threads Ib, IJbT are passing on their way between the not represented warp beam and the not represented cloth roller.
  • healds ⁇ , Y_ which comprise the known eyelets Ia, Ia ⁇ , through which the warp threads Ib, IJbT are passing on their way between the not represented warp beam and the not represented cloth roller.
  • IZ i.e. in the represented example of embodiment behind the weaving shafts 2 situated the weaving reed Ijc, which is provided by a row of known dents having space between one another, while the warp threads are passing through the weaving reed Ic through space between the dents.
  • the weaving reed Ic is positioned on a reversibly adjustable slay Id, which in the example of embodiment in the Fig. 1 is formed by a spring parallelogram connected with a cam drive or in an example of embodiment in the Fig. 2 it comprises reversibly rotatably mounted shaft with blowing nozzles etc.
  • the slay Id may be created in another suitable manner, which nevertheless is not decisive for the principle of the invention itself.
  • the known not represented device for weft insertion into the shed Ie In the direction X from the warp beam behind the pulse sector IZ, i.e. in the represented example of embodiment behind the weaving reed 1c, there is situated the known not represented device for weft insertion into the shed Ie.
  • the weft inserted into the shed ⁇ e after then during weaving is transported by a weaving reed ⁇ c_ on the slay ⁇ into the face If of fabric l£, which is gradually wound on the not represented cloth roller.
  • the warp threads Ib, IJtT are passing between the weaving reed Ic and pulse sector JZ, i.e. in represented example of embodiment through weaving shafts 2, between the force sector SZ, in which on the warp threads separated into branches the increased crossing of warp is realised.
  • the force sector SZ is realised by means of separation unit H and gripper 8.
  • the separation unit ⁇ in the represented example of embodiment comprises a system of stationary parallel vertical lamellas 12, whose pitch need not be the same as pitch of dents of weaving reed Ic or pitch of healds
  • Lamellas 12 of separation unit H in a section corresponding to lifting of warp threads ⁇ b, IJ/ by acting of device of pulse sector IZ are sloped towards the vertical direction, so that the warp threads JLb, It/ being lifted or dropped by device of pulse sector JZ by acting of lamellas 12 of the separation unit H are simultaneously moving into sides, e.g. during motion upwards they are simultaneously moving to the right and during motion downwards they are simultaneously moving to the left, etc. It is also possible that warp threads Ib, IJT being lifted or dropped by device of pulse sector IZ by acting of lamellas 12 of separation unit H in the first phase of shed creation move traverse towards direction of the shed creation to the same side.
  • warp threads Ib, IJ/ induced by the device of pulse sector IZ and by separation unit JM the warp threads Ib of upper part of shed are shifting e.g. upwards to the right towards the shaft shedding mechanism, while the warp threads JM/ of lower part of shed are shifting e.g. downwards to the left towards the shaft shedding mechanism.
  • the catching means of gripper 8 are assigned, which catch the warp threads IJb, JN/ for realisation of increased crossing of warp.
  • the gripper 8 is coupled with driving device, which constantly and with required frequency and phase towards the device of pulse sector IZ realises the required lifting function. Thanks to this the gripper 8 is able to realise an increased crossing of warp in the force sector SZ accurately according to the time schedule corresponding to co-operation with other parts of the loom, especially with the device of pulse sector ]Z and its lifting function.
  • the gripper 8 may to the separation beam V ⁇ _ be assigned either from the side of weaving reed Jk:, as represented in the Fig. 1 , or from the side of pulse sector
  • the gripper 8 with straight-lined reversible motion.
  • the gripper 8 comprises a pair of bars 14 with cuts 15, inlet openings 16 and retaining hooks 17.
  • the cuts 15, inlet openings t6 and hooks 17 correspond to the spacing between lamellas ⁇ 2 of separation unit H and enable catching of warp threads of respective branch of shed on the hooks J[7.
  • the bars 14 are coupled with the straight-lined reversible drive, which provides for a continuous motion of bars 14 upwards and downwards with the required frequency, phase and amplitude.
  • the gripper 8 with rotation reversible motion when on a pair of reversible rotating shafts 18 are mounted the catching means 18a of warp threads IJb, UbJ ⁇ separated by a device of pulse sector JZ and shifted to the side by the separation unit IJ..
  • the shafts 18 are coupled with rotating reversible drive, which ensures continuous reversible motion of shafts 18 with required frequency, phase and amplitude.
  • the separation unit H is situated in direction of warp threads from pulse sector IZ with healds
  • Lifting functions of device of pulse sector IZ and device of force sector SZ are mutually synchronised so that, the device of pulse sector IZ and the device of force sector SZ continuously execute their lifting function with desired frequencies, phases and amplitudes.
  • the separator of pulse sector IZ and force sector SZ is situated between the device of pulse sector IZ and device of force sector SZ in the represented example of embodiment.
  • the separator is formed by a pair of separating rods 19.
  • One weaving cycle with increased crossing of warp runs so that the warp threads are by means of pulse sector IZ separated into upper and lower branch of the shed. During this separation the warp threads are guided into catching means of the device of the force sector SZ, e.g. to the hooks 17.
  • the device of force sector SZ takes each of the branches of the shed and realises an increased crossing of warp.
  • the weft insertion through the shed with increased crossing, beating of weaving reed and return of the device of force sector SZ back there follows releasing of branches from the device of force sector SZ and catching of new branches of the shed by the device of force sector SZ.
  • another weaving cycle follows.
  • Z, SZ execute their function and mutually in a synchronous manner with desired frequency, phase and amplitude.
  • the invention may be used in the weaving looms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Replacement Of Web Rolls (AREA)

Abstract

L'invention concerne un procédé de tissage avec une croisure accrue de chaîne, dans lequel la foule, pendant un cycle de travail, est créée dans deux secteurs synchronisés (IZ, SZ), à partir desquels, dans le premier secteur d'impulsion (IZ), les fils de chaîne sont séparés en branches selon le motif de croisure spécifié, et dans le second secteur de force (SZ), une croisure accrue des branches de chaîne séparées dans le secteur d'impulsion (IZ) est réalisée, grâce à laquelle la résistance à la croisure est surmontée et un espace pour une introduction de trame est créé en même temps que l'activité dans les deux secteurs (IZ, SZ) fonctionne en continue et est synchronisée mutuellement. L'invention concerne également un métier à tisser pour un tissage avec une croisure accrue de chaîne, le métier à tisser comprenant une ensouple d'ourdissoir avec un paquet de fils de chaîne, un dispositif pour la création de la foule, un peigne de tissage lâche (1c), un dispositif pour l'introduction d'une trame dans la foule et un rouleau toilier pour l'enroulement du tissu. Le dispositif pour la création de la foule comprend le dispositif de secteur d'impulsion (IZ) pour la séparation de fils de chaîne en branches et le dispositif de secteur de force (SZ) pour la réalisation de la croisure accrue de chaîne, pendant que les deux dispositifs sont entraînés de façon synchrone.
PCT/CZ2007/000112 2006-12-21 2007-12-18 Procédé de tissage avec une croisure accrue de chaîne et métier à tisser pour effectuer le procédé WO2008074268A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07855987A EP2099965B1 (fr) 2006-12-21 2007-12-18 Procédé de tissage avec une croisure accrue de chaîne et métier à tisser pour effectuer le procédé
DE602007012937T DE602007012937D1 (de) 2006-12-21 2007-12-18 Verfahren zum weben unter erhöhter verkreuzung der kette sowie webstuhl zur durchführung des verfahrens
AT07855987T ATE500364T1 (de) 2006-12-21 2007-12-18 Verfahren zum weben unter erhöhter verkreuzung der kette sowie webstuhl zur durchführung des verfahrens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV2006817 2006-12-21
CZ2006-817A CZ305006B6 (cs) 2006-12-21 2006-12-21 Způsob tkaní se zvýšeným překřížením osnovy a tkací stroj k jeho provádění

Publications (2)

Publication Number Publication Date
WO2008074268A2 true WO2008074268A2 (fr) 2008-06-26
WO2008074268A3 WO2008074268A3 (fr) 2008-08-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2007/000112 WO2008074268A2 (fr) 2006-12-21 2007-12-18 Procédé de tissage avec une croisure accrue de chaîne et métier à tisser pour effectuer le procédé

Country Status (5)

Country Link
EP (1) EP2099965B1 (fr)
AT (1) ATE500364T1 (fr)
CZ (1) CZ305006B6 (fr)
DE (1) DE602007012937D1 (fr)
WO (1) WO2008074268A2 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573132A1 (fr) 1992-06-05 1993-12-08 Mitsubishi Jukogyo Kabushiki Kaisha Méthode de tissage et métier à tisser pour la fabrication d'un tissu plan multi-axial tissé en plusieurs couches

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0655978B2 (ja) * 1985-10-18 1994-07-27 株式会社豊田自動織機製作所 無杼織機における緯糸処理方法
JPH06297944A (ja) * 1993-04-09 1994-10-25 Suzuki Motor Corp 自動車ドア
DE10309260A1 (de) * 2003-03-03 2004-09-16 Berger Gmbh Verfahren zur Herstellung eines Gewebes und Weblitze, insbesondere zur Verwendung hierbei

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573132A1 (fr) 1992-06-05 1993-12-08 Mitsubishi Jukogyo Kabushiki Kaisha Méthode de tissage et métier à tisser pour la fabrication d'un tissu plan multi-axial tissé en plusieurs couches

Also Published As

Publication number Publication date
WO2008074268A3 (fr) 2008-08-07
ATE500364T1 (de) 2011-03-15
CZ2006817A3 (cs) 2008-07-02
EP2099965A2 (fr) 2009-09-16
DE602007012937D1 (de) 2011-04-14
EP2099965B1 (fr) 2011-03-02
CZ305006B6 (cs) 2015-03-25

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