CN1769557A

CN1769557A - Method for preparing flat ruche with large crystalline host lattice perforated twin-shaft mesh structure

Info

Publication number: CN1769557A
Application number: CNA2005101187069A
Authority: CN
Inventors: 罗兰德·冯纳
Original assignee: LIBA Maschinenfabrik GmbH
Current assignee: LIBA Maschinenfabrik GmbH
Priority date: 2004-10-28
Filing date: 2005-10-28
Publication date: 2006-05-10
Anticipated expiration: 2025-10-28
Also published as: DE102004052414B3; CN1769557B

Abstract

The invention relates to a method for preparing wide-mesh warp knit fabric with large crystalline lattice perforated twin-shaft mesh structure, in which a crosswise arrangement of warp (2) and weft (3) threads which are singly or in groups are taken to a knitting station (8). It utilizes the fixing threads (4) to bind warp and weft threads together at the cross-overs of the mesh structure. The fixing threads (4) form the mesh in the opposite two sides' knit texture. The warp (2) threads run through the knitting tools with no misalignment. The pull-off speed of the cross-overs of the mesh structure is lower than the pull-off speed in the mesh openings. The warp (2) threads aren't covered along their length and don't pass through the loops of the fixing threads (4). The warp (2) and weft (3) threads are bound by the surrounding of the yarn laying and the loop files of the fixing threads. The method can improve the production speed obviously.

Description

Making is with the method for the tricot with twin shaft eyed structure of big lattice perforate

Technical field

The present invention relates to the method that a kind of making has the tricot with twin shaft eyed structure of big lattice perforate, described method is particularly useful for making so-called how much lattice fabrics (also being known as Geo-Grid-Ware), for example in DE19957019A1 this is disclosed.This how much lattice fabrics have the arranged in a crossed manner of warp thread and weft yarn, and described warp thread and weft yarn are connected on its crosspoint by the coil of fixed yarn.

Background technology

How much lattice fabrics are protected in engineering, road construction work and the high building project in natural landscape and are adopted.Wherein will consume a large amount of large-area how much lattice fabrics, therefore described fabric must be a bulk article and necessary firm and cheap.In DE19957019A1 how much lattice fabrics have been done further design at multiple use, wherein how much lattice fabrics have plastic coating and are connected with nonwoven fabric etc.The tricot of how much form crystal lattices not only is applicable to the limited field of natural landscape protection engineering and road construction work; the known Application Areas of this lattice fabric also comprises and is applicable to specific use, for example the conveyer belt of textile industry field (US4433493).The present invention especially is intended to economically the method for the mesh fabric of how much form crystal lattices of above-mentioned making is designed.

Linguistic norm in the application's specification is as follows: " big mesh " means that the space between each weft yarn or the weft yarn group is several times of fixed yarn coil size.With regard to warp thread or warp thread group interval each other, equally also must satisfy this regulation.Therefore described interval be machinery compartment every several times.Described " warp thread " is the yarn that stretches on the processing of twin shaft eyed structure and lead, and described yarn also is known as ground warp in other publication; Described warp thread has a fineness degree, and described fineness degree surpasses the spoken implication of words " yarn ".When the coil of fixed yarn when warp thread stretches, therefore be regarded as the general but formation of unpopular general " wale " in professional language." row " repeated no more, and described row is stretching on broadwise all the time according to professional language.The definition of described warp knitting fabrics or tricot stitch sees also monograph " knitting and embroidery ", statement and the explanation done as basic principle in the K.-P. weber, 1992, the 167/168 pages of Heidelbergs.

Change the hauling speed of the biaxal crystal lattice structure of making periodically according to DE19957019A1, make the hauling speed of the crossover range of twin shaft eyed structure hauling speed less than the mesh scope.Therefore can improve speed of production.This measure only need weave warp thread and weft yarn with fixed yarn in the scope of crosspoint with the following basis that is thought of as, and therefore when the scope in lattice hole is passed through the braiding platform, loop-forming element can be thrown off.But the control of clutch that realizes the cycle of loop-forming element is very expensive and in addition because the quality that loop-forming element is moved and owing to stopping fully and driving when halted state is quickened again will bring special problem.Therefore people also allow with the fixed yarn lopping in the scope in lattice hole and therefore will pay the consumption cost relatively large to yarn.But the lopping width of fixed yarn can be bigger in the scope in lattice hole, thereby the quantity of coil can be less than the quantity of the coil in the bigger crosspoint scope of loop density.

At first can realize the variation of coil width in the following way according to DE19957019A1, when changing the hauling speed of eyed structure and Dang Qi crossover range periodically by the braiding platform, hauling speed lower and when lattice hole scope by establishment during platform, hauling speed is higher.Wherein the operating rate of loop-forming element remains unchanged.In DE19957019A1, also point out, under the situation that the hauling speed of lattice structure remains unchanged, also can change the operating rate of loop-forming element with above-mentioned reverse cycle ground, wherein when the crossover range of lattice structure is passed through the braiding platform, the operating rate of loop-forming element is very fast, with when the scope in lattice hole is passed through the braiding platform, the operating rate of loop-forming element is comparatively slow.Say that in principle the variation for realizing coil width shows, can change the hauling speed of the eyed structure of the operating rate of loop-forming element and twin shaft mutually insusceptibly, wherein also can take two kinds of measures simultaneously.The size that depends on output speed as for any scheme in two kinds of schemes of preferred employing.Promptly can realize braking and acceleration simultaneously to the cycle of eyed structure or loop-forming element; This point is at least than realizing easily in the time must stopping fully periodically loop-forming element and drive again.

, loop-forming element is driven and controls the following is precondition according to the working method of DE19957019A1 with the course of conveying of warp knitting machine is irrelevant.The design of this warp knitting machine belongs to the prior art that discloses in DE19816440C1, this document relates to a kind of warp knitting machine that can select the weft pattern circulation arbitrarily that has.In described file, also disclosed for the diversity that the increases style moving process by changing loop-forming element to the quantity of the weft yarn that in knitting cycle, woven exert one's influence (ibid, the 1st hurdle, 17-20 is capable).What therefore relate to is the prior art that discloses among the DE-OS2114700, can improve in the reticular density that weaves on the point by the lopping of adopting fixed yarn according to the prior art.

In DE19915722A1, the scheme of improving how much lattices is illustrated.Wherein at first be intended to improve being connected of warp thread and weft yarn, and needn't adopt additional fixed yarn or thicker fixed yarn.The loop length of fixed yarn is shorter than the scope of the lattice structure between it significantly in the scope that weft yarn and warp thread intersect for this reason.Wherein how explanation does not make this how much lattice fabrics.In DE19915722A1, particularly point out and to save fixed yarn significantly and improve manufacturing speed; But details is not described further therein.

At fixed yarn a kind of can the braiding or the chain coil (ibid, claim 4 and 7) of La Sheer through weaving into proposed in DE19915722A1.For example also mentioned warp plain stitch's (ibid, specification the 1st hurdle, the 19/20th row and the 2nd hurdle, the 20th row) of common form.But preferably adopt the pillar stitch of the fixed yarn shown in the embodiment Fig. 1 and 2 among the DE19915722A1.The row of the coil that is made of a unique fixed yarn-also be known as coil ranks-stretch and the warp thread in crossover range and the grid hole scope is coated along warp thread according to professional language, wherein weft yarn is also coated thereupon and is connected with warp thread in crossover range.Term " coating " means that warp thread passes the coil of fixed yarn.Owing to have the pillar stitch of remaining silent,, the connection yarn be set but also must add so known not only being organized of each coil ranks interconnects.Must carry out special braiding and prevent that the warp thread lateral deviation from moving described connection yarn.

So say in principle, be expensive according to the pillar stitch of DE19915722A1.Under the situation of how much lattices, also has following feature in addition, along with popularizing day by day of its will adopt more and more thicker warp thread and weft yarn to make described pillar stitch.Described warp thread and weft yarn are made of high-intensity polyester yarn or polyamide yarn mostly; But also can be by carbon fibre thread, polyamide yarn and glass fiber yarn.Wherein thickness is unrare for the warp thread that reaches 50.000 spies (tex) (warp thread bundle).The yarn of this thickness lateral deviation will inevitably occur and move when being coated by the coil of the fixed yarn in the pillar stitch.Realize that with the ground warp push jack this lateral deviation moves, realize that exactly the lateral deviation of at least one calibration is moved.This process will further reduce braiding speed.

In US4472086, disclosed a kind of how much lattice fabrics equally, wherein warp thread and weft yarn have been interconnected with fixed yarn.By with the coil mode fixed yarn being set through editing and interviewing.This how much known lattices are with only with good conditionsi similar according to how much lattices that disclose among DE19957019A1 and the DE19915722A1, and this is because be the cause of fine mesh.Wherein each coil of fixed yarn cooperates with the crosspoint of warp thread and weft yarn; Do not have the scope of the coil of fixed yarn, and weft yarn is not coated yet along the warp thread stretching, extension.Except other organizational form, in US4472086, also do not mentioned knit stitches with adding for example with distinguishing.

In DE 19802135A1, also disclosed a kind of lattice structure; it is identical with the structure that discloses in US4472086 with its structure that described lattice structure is known as the open width structure; but be applied to the trajectory field, wherein said structure plays effects such as chip resistant protection, anti-puncture protection, thermal protection and the protection of anti-deliberately destruction.Warp thread and weft yarn intersect mutually respectively and stackedly are connected with the yarn that is fixed in the crosspoint in DE19802135A1, wherein by forming coil in conjunction with making tricot.This special embodiment is shown in Fig. 6 and 7 of DE19802135A1.

The lattice structure that discloses in DE19802135A1 is made of independent cross one another warp thread and weft yarn usually; Mesh is less relatively; Its size with reference to the accompanying drawings shown in the scope of the coil width of thickness of yarn and fixed yarn.Wherein each crossover range to warp thread and weft yarn all has the coil of a fixed yarn to cooperate; In the mesh scope, there is not additional coil.Therefore in this document, do not relate to the problem that solution occurs in the geometry lattice structure of DE19957019A1.

Summary of the invention

The objective of the invention is to propose the method that a kind of making has the tricot of having of twin shaft eyed structure of big mesh, wherein in the quality of the tricot that keeps making, can further boost productivity and manufacturing speed.Wherein can produce special geometry lattice and axial lattice structure etc.

According to the present invention, realize that the technical scheme of described purpose is as follows:

A kind of making has the tricot method of having of twin shaft eyed structure of big mesh, has following method feature:

With warp thread and weft yarn individually and arranged in a crossed manner in groups and flow to the loop-forming element of braiding platform;

Form coil in the crossover range of warp thread and weft yarn and in the scope of mesh with fixed yarn at braiding platform upper edge warp thread;

In knitting technology weave, form the coil of fixed yarn;

Warp thread does not pass loop-forming element with having skew;

The formation of the coil of fixed yarn should make warp thread keep no winding state;

Be connected at crossover range warp thread and the weft yarn yarn that is fixed;

Pull out eyed structure from the braiding platform;

The hauling speed of eyed structure is changed and when working as crossover range and passing the braiding platform periodically, and speed is lower and pass when weaving platform when mesh, and speed is higher.

Method of the present invention combines a series of measures with useful compound mode, and described measure is supported mutually and replenished and the result of the realistic existing higher production of realizable force.

With fast continuous making and the least possible be starting point to useful compromise between the consumption of fixed yarn, wherein also can allow in the fixed yarn lopping according to the scope of the big mesh of precondition, but in the size of the coil at this place size greater than the coil on the crosspoint.Be arranged in the knit stitches and warp thread do not had lateral deviation pass loop-forming element with moving by coil, make warp thread on whole length, keep not having the state that coats fixed yarn; Therefore can think that the warp thread no longer situation described in the knit stitches that discloses passes the coil of fixed yarn in DE19915722A1.Therefore can form brand-new tissue image.Realize the fixing of warp thread and weft yarn in the following way, between the flotation line of coil on the weft yarn that reclines and the fixed yarn that on warp thread, stretches, warp thread and weft yarn encircled and enclose.To this advantage is that the loop-forming element of warp thread needn't be moved by lateral deviation.Carry out the braiding process so can adopt extra high speed.This advantage is further utilized, and wherein improves the hauling speed and the operating rate that does not reduce loop-forming element simultaneously of the lattice structure of making in the scope of mesh.This is because the braiding velocity peak value that occurs therein is high more, and it is just complicated more that braiding speed is carried out changing of cycle.

According to further design of the present invention, weft yarn slips into below warp thread and is arranged on the wale that the coil by fixed yarn in the crossover range forms.This point is specially adapted to continuous batch process.

According to further design of the present invention, the knitting technology weave of fixed yarn is as mutual reverse two-sided warp knitting fabrics, and its float stretches on warp thread.Wherein the tissue of fixed yarn has guaranteed that the fixed yarn coil is in warp thread and the accurate position above the weft yarn.

According to further design of the present invention, utilize fixed yarn to add a nonwoven fabric is connected with eyed structure.This names a person for a particular job and opens other application possibility for the tricot of making according to the present invention.

Description of drawings

Fig. 1 is tricot (lattice) schematic top plan view of making according to the present invention;

Fig. 2 is the schematic diagram of the warp knitting machine of enforcement method of the present invention;

Fig. 3 is the side-looking enlarged diagram through the volume platform of Fig. 2 warp knitting machine;

Fig. 4 a is the enlarged drawing of overlooking of the left side section of making tricot according to the present invention shown in Figure 1;

Fig. 4 b is the upward view with the corresponding right side of Fig. 4 a section.

The specific embodiment

Fig. 1 is the schematic top plan view of the tricot of lattice shape.Lattice 1 is made of for 2 groups warp thread, and described warp thread abuts on the weft yarn 3 that is provided with equally in groups.

The coil of fixed yarn 4 extends along warp thread 2, with big zigzag line and small circle fixed yarn is shown in Fig. 1.

In the crossover range 5 Intranet purpose sizes of warp thread 2 and weft yarn 3 less than lattice hole 6 scope Intranet purpose sizes.The design of the present invention's design is that the size of the mesh that needs is less than the scope Intranet purpose size of lattice perforate 6, so that every warp thread and ground warp are interfixed in the crossover range 5 that constitutes tie point.

The size of the coil of fixed yarn 4 constitutes the size of whole how much lattice 1 designs simultaneously.The mesh of how much lattices is known as macropore, and this is because the space between 3 groups of each weft yarns is several times of coil dimension of fixed yarn 4.This point also is applicable to the interval between each warp thread or the warp thread group.

Fig. 2 illustrates the principle of warp knitting machine, implements method of the present invention on described warp knitting machine.Wherein at first weft yarn 3 is arranged on the transport in groups spaced reciprocally.Then warp thread 2 is arranged on 3 groups of the weft yarns, utilizes and carry roller 7 continuously, but with the speed of conversion warp thread is carried for 3 groups simultaneously.Warp thread 2 and weft yarn 3 are fed to braiding platform 8 together.Simultaneously fixed yarn 4 that add and that pull out from section beam 9 is woven into coil according to the principle of knit stitches at braiding platform 4.How much lattices that traction roller 10 is used for making draw to arrow 18 directions from braiding platform 8 continuously.

With the hauling speed of cycle checker how much lattices 1 making are drawn, wherein when the mesh scope is passed braiding platform 8, traction is very fast and pass when weaving platform 8 when crossover range 5, draws comparatively slow.Adopt this mode to can be implemented in the mesh schematic diagram shown in Fig. 1.

Fig. 3 is the details enlarged drawing of braiding platform 8.Represent weft yarn, the importing below the warp thread 2 that imports in groups of described weft yarn with 3.With 4 fixed yarns of representing by sley point 11 settings.Weft yarn moves to braiding point 13 with weft yarn 3 for yarn plate 12, and the mode that adopts the professional to habitually practise herein utilizes slip guide pin 14 and slide plate 15 to realize lopping.Reference numeral 16 is represented knocking-over sinkers and is represented ground warp or warp thread push jack with 17.

Even when adopting very thick warp thread 2, warp thread 2 can not moved by lateral deviation yet when passing loop-forming element.Because the loop-forming element of warp thread 2 needn't be offset at least one needle gage for each lopping ranks again, this names a person for a particular job the speed production process is played a part key.Because alternately lopping on two adjacent pins in warp plain stitch, so the inclination of flotation line 19 will occur, described flotation line will carry out knocking over to warp thread 2.Warp thread 2 is uncovered on its whole length.Realize being connected of warp thread 2 and weft yarn 3 in the following way, weft yarn 3 below himself, have the coil of fixed yarn and on himself the mask warp thread, warp thread has flotation line 19 in the above.

Slip into below the warp thread 2 that in the practical ways of large-scale industrial production, stretches on the lead of basic how much lattices 1 that weft yarn 3 is being made in groups spaced reciprocally in continuous course of conveying.In the basic principle of organizing shown in Fig. 4 a and the 4b.The particular examples of mutual reverse two-sided warp knitting fabrics wherein illustrates upward view (technical term right side side) at vertical view shown in Fig. 4 a (technical term left side side) with at Fig. 4 b shown in the described figure.Can clearly be seen that cooperating of the flotation line 19 of fixed yarn 4 and coil 20 and itself and warp thread 2 and weft yarn 3 from Fig. 4 a and 4b.

Therefore adopt working method of the present invention can very fortunately realize the selection of multiple possibility that prior art is provided and it is combined into useful especially combination.

The Reference numeral table of comparisons

1 how much lattices

2 warp thread

3 Wei yarns

4 fixed yarns

5 crossover range

6 mesh

7 delivery rollers

8 braiding platforms

9 section beams

10 detaching rollers

11 sley points

12 weft yarns are given the yarn plate

13 braiding points

14 compound needles

15 slide plates

16 knocking-over sinkers

17 ground warps or warp thread push jack

18 direction arrows

19 flotation lines

20 fixed yarn coils

Claims

1. a making has the tricot of having of twin shaft eyed structure of big mesh, has following method feature:

A) individually and arranged in a crossed manner in groups and flow to the loop-forming element (8) of braiding platform with warp thread (2) and weft yarn (3);

B) in the crossover range (5) of warp thread (2) and weft yarn (3) and in the scope of mesh (6), form coil (20) at braiding platform (8) upper edge warp thread (2) with fixed yarn (4);

C) in warp plain stitch, form the coil (20) of fixed yarn (4);

D) warp thread (2) does not pass loop-forming element with having skew;

E) formation of fixed yarn (4) coil (20) should make warp thread (2) keep no winding state;

F) warp thread (2) and weft yarn (3) yarn (4) that is fixed is connected in crossover range (5);

G) pull out eyed structure from braiding platform (8);

H) hauling speed of eyed structure is changed periodically and when working as crossover range (5) and passing braiding platform (8), speed is lower and pass when weaving platform (8) when mesh (6) scope, and speed is higher.

2. in accordance with the method for claim 1, wherein weft yarn (3) slide to be imported and is arranged on below warp thread (2) on the wale that the coil by fixed yarn (4) (20) in the crossover range (5) forms.

3. in accordance with the method for claim 2, wherein the warp plain stitch of fixed yarn (4) is as mutual reverse two-sided warp knitting fabrics, and its float (19) stretches on warp thread (2).

4. each described method in requiring according to aforesaid right is wherein utilized fixed yarn to add a nonwoven fabric and eyed structure is linked together.