EP0890666A1 - Peigne de metier a injection d'eau et procede de tissage l'utilisant - Google Patents

Peigne de metier a injection d'eau et procede de tissage l'utilisant Download PDF

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Publication number
EP0890666A1
EP0890666A1 EP97909627A EP97909627A EP0890666A1 EP 0890666 A1 EP0890666 A1 EP 0890666A1 EP 97909627 A EP97909627 A EP 97909627A EP 97909627 A EP97909627 A EP 97909627A EP 0890666 A1 EP0890666 A1 EP 0890666A1
Authority
EP
European Patent Office
Prior art keywords
reed
blades
weaving
warps
water
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Withdrawn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
EP97909627A
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German (de)
English (en)
Other versions
EP0890666A4 (fr
Inventor
Masaharu Teijin Limited KAWAMURA
Hideki Teijin Limited KAWAMINAMI
C. Takayama Reed Co. Ltd. MIYAMUKAI
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.)
Teijin Ltd
Original Assignee
Teijin Ltd
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
Priority claimed from JP8357649A external-priority patent/JPH09302557A/ja
Application filed by Teijin Ltd filed Critical Teijin Ltd
Publication of EP0890666A1 publication Critical patent/EP0890666A1/fr
Publication of EP0890666A4 publication Critical patent/EP0890666A4/fr
Withdrawn legal-status Critical Current

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    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/32—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by liquid jet
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D03D47/278—Guide mechanisms for pneumatic looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D03D49/62—Reeds mounted on slay

Definitions

  • the present invention relates to a reed for a water jet loom, which reed is used for weft insertion by feeding the weft by means of a stream of water ejected from a nozzle disposed in the water jet loom. Further, the present invention relates to a method of weaving a thermoplastic synthetic fiber fabric, using the above reed, and more specifically, to a method of weaving a thermoplastic synthetic fiber fabric using, as warps, soft-twisted multi-filament yarns composed of a polyester or some other thermoplastic synthetic fiber or substantially zero-twisted multi-filament yarns having tie points formed by interlacing and composed of a polyester or some other thermoplastic synthetic fiber.
  • a water jet loom which permits the flying of a weft by means of ejected water and therefore can serve to decrease the shedding amount of warps, is advantageous in that the height (lengthwise dimension) of the reed can be decreased and that the reed can be decreased in weight.
  • it is the more required to increase the shedding amount of warps because the stability of flying of a weft is poor, and the above problems such as vibration, etc., caused by the reciprocation of the reed is therefore more serious.
  • Fig. 1-a shows a side view of the reed used in an air jet loom.
  • Fig. 1-a showing a state in which warps 6 are allowed to form a vertical open shed by forming a shedding angle ⁇ with a reed blade.
  • the linear reed blade 22 is required to have a reed height H'.
  • a reed height H is sufficient. The reed can therefore be decreased in height, and it can be decreased in weight.
  • those soft-twisted yarns having a twisting number of less than 500 per meter are concerned, those soft-twisted yarns that have a relatively large twisting number can be relatively easily woven to a fabric by fixing their filaments with a sizing agent.
  • those soft-twisted yarns which have a twisting number of 300 or less and a substantially zero-twisted multi-filament yarn having tie points provided by interlacing are difficult to be woven to a fabric.
  • a zero-twisted multi-filament yarn having neither twisting nor tie points is much more difficult to be woven to a fabric at a practical speed.
  • the tie points formed by the interlacing are untied during the weaving, and after the completion of the weaving, the number of the tie points per meter is several at the largest, so that a fabric similar to a fabric woven from zero-twisted yarns can be woven.
  • it is very difficult to weave a fabric using multi-filament yarns with a water jet loom, and there are problems that a fabric is poor in product quality since warps heavily abraded by water-adhering reed blades undergo filament breakage and that the operation of manufacturing machines is often discontinued due to yarn breakage.
  • a reed for water jet looms characterized in that said reed has reed blades whose upper portions have the form of being bent toward the cloth-fell in the form of a "dogleg" in a state where the reed blades are attached to the reed for a water jet loom.
  • a method of weaving a fabric characterized in that each weft is inserted into a weaving shed by means of a stream of ejected water in a state where the distance from a contact point of a reed blade and a warp when a reed reaches its retracting position to the cloth-fell is decreased by using the above reed in which reed blades is bent in the form of the above "dogleg", said warp being thermoplastic synthetic fiber multi-filament yarns each of which has a twisting number of at least 100 per meter or each of which is with tie points formed by interlacing and substantially zero-twisted.
  • Fig. 2 is a side view illustrating one embodiment of the reed for a water jet loom according to the present invention.
  • 1 indicates a reed blade
  • 2 indicates an upper channel
  • 3 indicates a reed blade holder
  • 4 and 5 indicate upper and lower coils, respectively
  • 6 indicates a warp.
  • the reed 10 for water jet looms, provided by the present invention, has a constitution comprising the above reed blade 1, the upper channel 2, the reed blade holder 3, the upper coil 4 and lower coil 5.
  • the reed blade 1 is fixed to the upper channel 2 and the reed blade holder 3 in its top end and bottom end, respectively, and a number of such reed blades are disposed side by side in a vertical direction from the paper surface of Fig. 2 through upper coils 4 and lower coils 5 such that adjacent reed blades are held at predetermined intervals for threading warps.
  • the upper portion of the reed blade 1 has the form of being bent toward the cloth-fell in the form of a "dogleg" in a state where the reed blade 1 is attached to a reed for a water jet loom, and the depth of the upper portion along the warp threaded direction is arranged to be smaller than the depth of the lower portion.
  • the lower portion of the reed blade is fixed to the reed blade holder 3 in a state where the extending direction thereof is tilted in the counter direction against the cloth-fell.
  • symbols A, B and C show three positions of one reed blade which rocks drawing an arc indicated by S during the weaving.
  • Symbol A shows a position in which the reed blade 1 is the farthest from the cloth-fell (a state where weft insertion is effected by means of water ejected from a water ejection nozzle)
  • C is a position in which the reed blade 1 is the closest to the cloth-fell (a state where a weft is pressed to warps with the reed)
  • B shows an intermediate position between these A and C.
  • the reed of the present invention has a characteristic feature in that the upper portion of the reed blade 1 is bent toward the cloth-fell (rightward in Fig. 2) in the form of a "dogleg” in a state where the reed blade 1 is attached to the reed.
  • the "form of a "dogleg”” can be further defined as follows. The bending point is present above a point where the reed contacts the cloth-fell, and the upper portion of the reed is bent toward the cloth-fell.
  • the position of the bending point is preferably in the range of 0.5 mm to 20 mm apart, particularly preferably 0.7 mm to 15 mm apart, from the cloth-fell. Further, the bending angle is preferably in the range of 20° to 45°, particularly preferably 25° to 40°.
  • a conventional reed blade merely has a straight form as shown by a chain line in Fig. 1-a, and it does not show any extraordinarily that the present invention has concerning the bending thereof toward the cloth-fell in the form of a "dogleg" and the arrangement of a dimensional difference between the depth of the upper portion and the depth of the lower portion of the reed blade.
  • water held among reed blades (1) elutes a sizing agent which works as a protective layer on warps threaded through among the reed blades so that the warps are abraded and damaged and that (2) the reed is increased in weight due to the water adhering to the reed blades and vibrated due to the motion (up and down movement along the reed blades) of the water which takes place with the rocking of the reed.
  • a reed which is to permit the excellent removal of residual water held among reed blades, and the reed of the present invention has been accordingly arrived at.
  • a conventional reed blade has the form of a structure in which it straightly extends in the direction in which a centrifugal force works and the upper channel which stops water is present in the extending direction of the reed blade.
  • its upper portion is bent toward the cloth-fell in the form of a "dogleg", which plays an important role in the removal of water.
  • each reed blade 1 since the upper portion of each reed blade 1 is bent in the form of a "dogleg", a barrier, such as the upper channel 2, which plays a role in stopping water which is forced to upwardly move further from the bending portion, is no longer present. Therefore, water held in the lower portions of the reed blades 1 is directly shaken off from the reed blades in the bending portions under the centrifugal force.
  • the reed blades 1 used in the present invention are therefore shaped so as to have the form of being bent toward the cloth-fell in the form of a "dogleg", whereby the direction in which water can move while being constrained under the surface tension with the reed blades 1 and the working direction of a centrifugal force are distinctly different. Owing to this tiny device, water held among the reed blades 1 is released from the constraint under the surface tension with the reed blades 1, and is consequently shaken off from the backside edges (edges opposite to the cloth-fell, in the threading direction of warps) of the reed blades 1 under the centrifugal force.
  • the depth of the upper portion of each reed blade 1 along the warp-threaded direction is arranged to be smaller than the depth of the lower portion.
  • each reed blade 1 rocks drawing an arc in Fig. 2
  • the force exerted on the root (lower end) of each reed blade is larger than the force on an upper end, and therefore, the reed blade is required to have high strength and high rigidity.
  • the depth of the lower portion of each reed blade 1 can be arranged to be greater than the depth of the upper portion, and the strength and the rigidity can be therefore sufficiently secured. Further, since the depth of the upper portion can be narrowed so that the reed blades 1 can be decreased in weight. Eventually, the reed itself can be decreased in weight.
  • each reed blade 1 is tilted opposite to the cloth-fell, and the lower end of each reed blade 1 is fixed to the reed blade holder.
  • the front surface when viewed from the cloth-fell side is dented in the form of a "dogleg" (hatched portion in Fig. 2), so that the dent in the form of a "dogleg” can be allowed to play a role as a guide space for smoothly flying a weft when the weft is fed in the open shed by means of ejected water.
  • the weft insertion is stably accomplished.
  • thermoplastic synthetic fiber fabric using the above reed in a water jet loom, will be explained hereinafter with reference to Figs. 3 and 4.
  • the method of the present invention uses the reed in the form of a "dogleg” as means of preventing warp fluffing and warp breakage.
  • Fig. 3 is a schematic side view showing differences between the weaving method of the present invention and a conventional weaving method using a straight-shaped reed.
  • the reed 10 bent in the form of a "dogleg", used in the present invention is shown by a solid line, and the conventional straight-shaped reed 21 is shown by an imaginary line.
  • beating up positions and retracting positions are shown, and it is shown that the rocking angle ⁇ is the same as that in the conventional method.
  • the first feature of the weaving method of the present invention is that the abrasion stroke S of the reed blade 1 relative to the warp 6 of the open shed can be remarkably decreased as compared with the abrasion stroke T in the conventional method. That is, the upper portion of the reed blade 1 is bent toward the cloth-fell 15 in the form of a "dogleg", whereby the contact point 16 of the reed blade 1 and the warp 6 when the reed is retracted can be allowed to come closer to the cloth-fell side than a contact point 23 then the conventional straight-shaped reed blade 22 is used.
  • the abrasion stroke of the reed blade 1 relative to the warp 6 can be decreased, and, since that portion which is decreased is on the top end side of the reed blade, i.e., a portion which abrades warps at a higher rate, the damage of warps caused by the abrasion with the speed, blade can be decreased more than it is decreased to an extent that the abrasion stroke is decreased.
  • the flying passage of wefts is made smaller by a region 17 indicated by slanting lines. Since, however, the stream of ejected water transporting a weft 18 is diffused in a circular region with the weft being its center, the region 17 indicated by slanting lines is a portion which from the beginning does not much effectively function as a passage for a stream 19 of transporting ejected water and the weft 18, and a decrease in cross-sectional area caused by the bending of the read blade 1 in the form of a "dogleg" causes almost no barrier against the weft insertion.
  • the weft passage has the form close to a circle which is the convergence of a stream of ejected water, and therefore, water drops which exist in a peripheral area of the diffusion and do not work to transport the weft are dissipated by their collision with the reed blade 1. Effectively enough, the damage of the weft caused by the water drops which are diffused in the peripheral area and collide with the weft is decreased.
  • the second feature of the weaving method of the present invention is that since the upper portion of each reed blade is bent in the form of a "dogleg", water drops which are enormous diffused upwardly and do not serve to transport the weft collide with the bent reed blades to be dissipated, whereby the damaging of the weft by the direct collision of water drops having a high velocity with the weft can be decreased.
  • the front edge of the bending portion of the reed blade which is bent in the form of a "dogleg” forms an arc-shaped portion 20.
  • the position which is to collide with the cloth-fell at a beating up is arranged to be a position a little lower than a contact point 12 of a straight line portion 11 beneath the front edge of the reed blade and the above arc-shaped portion 20, whereby the weft passage at a weft insertion time can be adjusted to a form encircling a circular stream of ejected water by the form of a "dogleg" of the reed blades 1 without changing the rocking angle and position of a slay sword.
  • Fig. 4 is given for explaining that the above effect of the present invention can be sufficiently exhibited even if the rocking angle ⁇ 2 of the reed is made greater than the rocking angle ⁇ 1 in the conventional method.
  • the reed 10 having reed blades 1 bent in the form of a "dogleg" is used, and the rocking angle ⁇ 2 of the slay sword to which the reed is attached is made greater, to some extent, than the rocking angle ⁇ 1 in the conventional method.
  • the decrement 17 of the weft passage caused by the bending of the upper portion of the reed is compensated by an increase in the weft passage in the lower portion of the reed blade, which increase is brought by increasing the rocking angle of the slay sword, and the weft passage is greater than that in the embodiment in Fig. 3 so that the weft insertion can be eased.
  • the abrasion stroke of the reed blade 1 against the warp 6 in an upper portion of an open shed can be made by far smaller than that in a case using a straight-shaped reed blade 22, and owing to the bent reed blades, ejected water which is enormous deviated upwardly above the weft 18 can be dissipated by allowing it to collide with the upper portion of each reed blade bent in the form of a "dog leg". Therefore, the same effect as is explained concerning the Fig. 3 can be exhibited, and the damage of the warp 6 can be remarkably decreased.
  • the weaving method of the present invention has the third feature that the amount of water held among the reed blades can be remarkably decreased, and that the damage of warps caused by the crossing of the warps through water held among reed blades at a high velocity can be decreased, by the characteristic of the above reed bent in the form of a "dogleg", i.e., the characteristic that water held among the reed blades in a position lower than the bending point of each reed blade is shaken off backward from the reed (opposite to the cloth-fell) in the bending portion 13 of each reed blade by a centrifugal force which occurs with the rocking of the reed blades and works in the direction of an arrow A in Fig. 4.
  • the interference between the top end of the reed 10 and a heald 14 comes to be avoidable, so that the distance between the heald 14 and the cloth-fell 15 can be decreased and that the up and down stroke of the heald 14 for obtaining an identical open shed of warps can be made smaller than that in the conventional method.
  • the method of the present invention therefore has the fourth feature that the damage of warps can be decreased in the above point as well.
  • the above features more effectively work on soft-twisted multi-filament yarns of which some filaments alone are damaged due to the abrasion with the reed 10 and the heald 14 and of which the filaments are liable to be loose due to the collision of water drops and the crossing thereof through water held among reed blades and substantially zero-twisted multi-filament yarns having similar disadvantages and having tie points formed by interlacing. Therefore, the use of the method of the present invention enables the easy weaving, at a high velocity, of thermoplastic synthetic fiber fabric using soft-twisted warps or substantially zero-twisted warps having tie points formed by interlacing, without damaging the warps.
  • wefts are not crimped and flying wefts therefore show less useless meandering so that the open shed of warps can be decreased. Therefore, the above effects of the present invention can be more efficiently exhibited.
  • a weaving test was carried out by the use of a water jet loom on which a reed provided with reed blades having a form similar to the reed blade shown in Fig. 2 is mounted.
  • the depths of the reed blades in the threading direction of warps were 2.2 mm in an upper portion and 3 mm in a lower portion, and the number of reed blades per inch was 48 reed blades/inch.
  • the bending angle of the upper half relative to the lower half of each reed blade for shaping the form of a "dogleg" was 30°.
  • the contact position of the front surface of the reed to the cloth-fell was set at a position 1 mm lower from a point where the arc (R portion) of the bending portion of the reed and the straight line of the lower half of the reed met with each other.
  • Comparative Example With regard to a conventional reed having straight reed blades, looms were studied for the number of times of discontinuation (times/day-number of looms) under the same conditions as those in Example 1 except the reed (see Table 1). Comparative Example Example Discontinuation caused by warps 0.5 0.1 Discontinuation caused by wefts 0.2 0.2 Discontinuation caused by loom 2.1 0.4 Discontinuation caused by other factors 0.6 0.5 Total 3.4 1.2
  • the discontinuation was caused by the tangling of leading end of wefts inserted into the open shed of warps and a decrease in turning, and it was found that the reed of the present invention had an effect on the stability of flying of wefts as compared with the conventional reed.
  • the reed weight which controls the velocity of the weaving rate of a water jet loom can be decreased, that the occurrence of vibration caused by the up and down movement of water held among reed blades can be remarkably decreased, further that the elution amount of a sizing agent remarkably decreases, and that warps do not cause the fluffing or breakage under the abrasion of reed blades.
  • a polyester filament fabric having a weft density of 47 wefts/inch was woven at a loom rotation of 750 rpm by the use of a reed (density: 19 blades/cm) having reed blades which had a form similar to that of the reed blade shown in Fig.
  • a polyester filament woven fabric was produced at a loom rotation of 700 rpm by the use of a reed (density: 18.5 blades/cm) having reed blades of which the upper portions were bent toward the cloth-fell at 33° in the form of a "dogleg" as in Example 2 and had a smaller width than the lower portions thereof, using, as warps, filaments prepared by allowing a polyacrylic sizing agent to adhere to substantially sizing agent-free polyester filaments having a size of 75 denier/72 filaments and 7 interlaced tie points per meter and being not twisted except twisting by unwinding, and as warps, polyester filaments of the same kind having a size of 75 denier/72 filaments.
  • the number of times of discontinuation of looms were as shown in Table 3. The number of times of discontinuation of looms can be remarkably decreased as compared with a case using a conventional reed.
  • a nylon filament fabric having a weft density of 30 wefts/inch was woven at a loom rotation of 900 rpm by the use of a reed (18 blades/cm) having reed blades of which the upper portions were bent toward the cloth-fell at 30° in the form of a "dogleg" as in Example 2, using, as warps, a filament yarn prepared by applying a twist of 300 T/M to a nylon filament yarn having a size of 70 denier/108 filaments and further allowing 3.5 % by weight of a polyacrylic sizing agent to adhere to it and as warps, a nylon filament yarn of the same kind having a size of 70 denier/108 filaments.
  • thermoplastic synthetic fiber fabrics of polyester yarns, etc. using almost no-twisted multi-filaments, can be woven easily at a high velocity, and the industrial significance thereof is great.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
EP97909627A 1996-12-26 1997-10-24 Peigne de metier a injection d'eau et procede de tissage l'utilisant Withdrawn EP0890666A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP357649/96 1996-12-26
JP8357649A JPH09302557A (ja) 1996-03-14 1996-12-26 水噴射織機用オサ及び当該オサを用いる製織方法
PCT/JP1997/003872 WO1998029589A1 (fr) 1996-12-26 1997-10-24 Peigne de metier a injection d'eau et procede de tissage l'utilisant

Publications (2)

Publication Number Publication Date
EP0890666A1 true EP0890666A1 (fr) 1999-01-13
EP0890666A4 EP0890666A4 (fr) 1999-03-31

Family

ID=18455203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97909627A Withdrawn EP0890666A4 (fr) 1996-12-26 1997-10-24 Peigne de metier a injection d'eau et procede de tissage l'utilisant

Country Status (5)

Country Link
EP (1) EP0890666A4 (fr)
KR (1) KR19990087207A (fr)
CN (1) CN1077619C (fr)
ID (1) ID20309A (fr)
WO (1) WO1998029589A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1012164A3 (nl) * 1998-09-04 2000-06-06 Picanol Nv Riet voor een weefmachine.
FR2886951B1 (fr) * 2005-06-08 2007-08-31 Schonherr Textilmaschb Gmbh Dispositif d'insertion de fils de trame pour metier a deux nappes superposees et metier a tisser equipe d'un tel dispositif
CN101629351B (zh) * 2009-08-05 2012-10-03 青岛金三阳纺织机械有限公司 一种塑料编织喷水织机的分经筘
KR102118330B1 (ko) * 2019-01-23 2020-06-03 삼성에스티에스(주) 직조기 리드 및 직조기 리드의 제조 방법

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457344A (en) * 1980-11-20 1984-07-03 Sulzer Brothers Limited Reed for a weaving machine
DE4138046A1 (de) * 1990-11-19 1992-05-21 Gueth & Wolf Bandwebautomat zum weben eines schlaufenbands

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425459A (en) * 1967-03-23 1969-02-04 Marshall John D Camming beat-up mechanism for looms
JPS5070271U (fr) * 1973-10-22 1975-06-21
CH649586A5 (de) * 1981-03-05 1985-05-31 Rueti Ag Maschf Blattzahn fuer duesenwebmaschinen und unter verwendung des blattzahns hergestelltes webblatt.
JPS62133147A (ja) * 1985-12-05 1987-06-16 ユニチカ株式会社 ポリエステル加工糸織物の製造方法
JPS63159545A (ja) * 1986-12-17 1988-07-02 ユニチカ株式会社 ポリエステル長繊維加工糸織物の製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457344A (en) * 1980-11-20 1984-07-03 Sulzer Brothers Limited Reed for a weaving machine
DE4138046A1 (de) * 1990-11-19 1992-05-21 Gueth & Wolf Bandwebautomat zum weben eines schlaufenbands

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9829589A1 *

Also Published As

Publication number Publication date
ID20309A (id) 1998-11-26
CN1077619C (zh) 2002-01-09
EP0890666A4 (fr) 1999-03-31
CN1216587A (zh) 1999-05-12
KR19990087207A (ko) 1999-12-15
WO1998029589A1 (fr) 1998-07-09

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