EP1489210A1 - Method of manufacturing a face to face pile fabric on a double-plush loom - Google Patents

Abstract

A double pile face-to-face fabric for eventual separation into an upper (WO) and lower (WU) fabric is woven with two weft insertion planes for the forward (SJ) and return (SR) weft. The weft pattern has a repeat (RS) of at least four picks while the chain warp (B) has a repeat (RB1) of eight picks. All pattern pile yarn is held by the outer return weft (RS). The dead pile (PT) is held between the outer return weft (RS) and the inner forward weft (SJ). The chain warp threads can be arranged in pairs displaced by two picks, with a pair covering two adjacent outer wefts (SR) and then together the inner weft (SJ). Alternative repeat cycles for the weft and chain warp can also be used.

Description

The invention relates to a method for producing a double-pile fabric a double-pole weaving machine with at least two weft insertion levels below Use of weft threads, filling warp threads and groups of binding warp threads for the formation of an upper and a lower basic goods as well as choirs of Pile threads per warp course for the formation of a patterned, between the basic goods separable pile layer, the non-patterned pile threads, the dead poles, between the back and inside wefts while stabilizing the basic goods are involved.

EP 1 217 114 A1 describes a process for producing a double carpet fabric known with symmetrically arranged patterned poles. The Sighting pile threads bind exclusively through back shots entered at the same time of upper and lower goods. At regular intervals, so-called Internal shots entered, which the non-patterning pile threads - the so-called dead poles - tie to the base fabric by crossing with appropriate binding warp threads. To for this purpose the rhythm of the weft insertion is changed. The repeat of the Weft entries extend over at least four weaving machine tours. The Pole binding on the back of each product is achieved by entering the inner shots not changed.

The binding warp threads close the back wefts of successive tours mostly one or in pairs between them. In the area of the registered Inner wefts also wrap individual binding warp threads around this inner weft. To balance the binding length takes place between the binding warp threads There is usually a change of rhythm twice within a repeat and a group instead, so that the binding warp threads within a repeat of the group of Binding warp threads all have a uniform binding length.

This type of binding is advantageous because a change of pile thread is practically in everyone second tour can be done and each pole handle with high strength and vertical arrangement can be anchored in its basic goods.

Another advantage of this product is that the clamping of the pole handle between successively inserted wefts in the warp direction only in The area of the back shots is done. The lower number of inside shots allows on the one hand, saving shot material. On the other hand, enable the interior shots, which are arranged in fewer numbers, have limited lateral evasion the pole leg. The pole layer, the elasticity of the step and the comfort of the step determined, so it begins immediately inside, adjacent to the back shots.

The disadvantage of this type of binding is primarily the mandatory one symmetrical arrangement of all patterning poles. With a clean color pattern thus a higher number, namely double the number of choirs required. The in turn, requires a more complex machine with multiple control points.

Another disadvantage is that the majority of the crossing points of the binding warp threads is arranged in the plane of the back shots and thus in Area of the highest, concentration of pole material between the back shots located. As a result, the weft density and thus the pole row density (in Warp direction) limited.

EP 1 180 556 A1 describes a method for producing a double-pile fabric described with asymmetrical pole handle integration. With the two-shot Working method is in each tour in each of the basic goods (upper or lower goods) a shot entered. One of the shots is a back shot, a second Shot is an inside shot. The number of back shots is therefore identical to the number of internal shots registered - based on one of the two goods.

The patterned pile threads bind exclusively on the outside via the back weft. Each pole handle has two clamping points per basic product, which are located in the depth of the Fabric are arranged one above the other. Two pole legs become regular between two successive back shots and also between two successive interior shots clamped in the same way.

Are z. B. with a three-contact operation and two-turn pole binding also create so-called intermediate shots between the fill chain and dead poles the intermediate shots also have an additional clamping point.

The carpet product produced in this way has a very high pull-out strength all pole handles. The legs of the pole handles regularly protrude vertically of the basic goods.

The disadvantage, however, is that the area of the free pole leg, which is essentially co-determines the step elasticity or the step comfort of a carpet fabric starts at the area of the inside shot. This weaving process leads increased thread consumption due to the greater depth of the base fabric Pole material and shot material.

The document describes binding reports for the binding warp threads, which extend over a larger number of weft insertion cycles. The illustrated Binding reports are based on the fact that - in addition to one firm binding of the interior shots to back shots in depth - also one . Firm binding of weft threads adjoining one another in the warp direction (weft density) is guaranteed.

It depends on the design of the binding reports, with the least Tie thread consumption in the area of the basic weave the clamping points in the plane to design the back shots as well as the inside and / or intermediate shots that at a given high density a solid and largely vertical Integrating the pole piece can be guaranteed.

The binding warp threads are used to ensure a saving of thread material a group divided into adjacent warp courses.

In this context we understand a group of binding warp threads the binding warp threads usually assigned to a warp course, which within a Binding report of every weft thread (back or inner weft) at least cross once tying.

With the aim of saving binding chain material bind z. B. pairs of binding warp threads sections only with back or inner shots. The number of Change of subject between the level of the back shots and the level of the inner shots is reduced. The resulting savings in binding chain material is welcome.

To ensure a uniform integration length of a warp beam Pulled off warp threads of the group are within a weave repeat Rhythm change provided. By changing the rhythm, the function of the Change of subject between the shot levels mentioned, the regular one longer binding length required, evenly distributed on all binding warp threads.

A further saving in binding chain material is achieved in that the Binding warp threads of a group can be distributed on adjacent warp courses.

The disadvantage is that the type of bindings chosen is a paired assignment an inside shot to every back shot is necessary. But that leads - as already described above - to double clamping points and thus to one increased pile thread consumption.

DE 21 64 948 A1 describes a weaving process in which the Weft threads are entered in a four-speed repeat, for example. Two pairs of weft threads are initially entered in successive tours. One of these weft threads entered in pairs is an inner weft in a first product (upper or lower product) and a back shot in one second commodity. The assignment changes in the following tour. In the further Two individual shots are then entered. A first single shot is a Back shot in the second goods and another single shot a back shot in the first commodity.

The three shots in each item entered in the four tours are through two binding warp threads of a group enclosed in a common opening. The inner weft is located between two of a binding warp thread encircled back shots.

The highest concentration of pile threads between successively entered Weft threads are in the level of the back wefts of each product. In the same level also cross after every fourth weft insertion cycle the binding warp threads in each warp course at the same time.

With this method, something can already be done with asymmetrical pole binding higher, but still clearly limited shot density and thus pole row density to reach.

Another disadvantage of this procedure described here is that the non-patterning pile threads (the dead poles) at the bottom of the pile layer one of the float both base fabrics and only by the pattern changing Pole binding can be kept in this area. The advantage of the higher Elasticity due to the lower number of internal shots with the lowest possible Total pole height arises, is compensated again, because for hiding the floating dead poles a certain, larger pole height is required.

Given a large pattern design, you decide for that Removing these little bound dead poles is then a significant technical one Effort connected in a further work step. It also says essential part of the pole material for the design of the step comfort no longer to disposal. It becomes waste.

According to another example of DE 21 64 904, the non-patterning poles (Dead poles) by means of an internal weft and a suitably guided binding chain on the pole side held on the back shot. The three within four tours (weft insertion cycles) registered weft threads per product (upper goods, lower goods) enclosed in a single opening by two binding warp threads per product. At the same time, the three shots mentioned include two back shots and one Inside shot - the filling chain and the dead poles between them in depth. The Internal shots of both goods are entered in pairs. The back shots on the other hand, by omitting one shot entry, they are always shot individually introduced alternately in the two goods. Becoming a patterned pole handle - apart from the change of pile thread - spread from the back of both goods. When changing the pile thread, individual legs of pile handles of Inside shot open:

Apart from the limited productivity - during the inside shot entry If no pile handles are formed in a tour - this binding is a change of pile thread only possible after every fifth weft insertion cycle. Every sample point must necessarily consist of at least two sticks. The limits the pattern resolution considerably. The shot density is also limited here.

Finally, EP 1 152 076 A2 describes a weaving method in a similar way, as it was disclosed by DE 21 64 904. The only difference is in that the pole handles of the upper or lower fabric alternate between back shots both goods and between arranged within the filling chain "Intermediate shots" of both goods are spanned.

The three shots of each item entered within a four-speed repeat are thus in three different levels, which are parallel to the level of Extend filler warp threads of the fabric.

The highest density of the pole legs is equally in the level of the intermediate shots and - in much the same way - at the level of the inside shot reached. At the level of the intermediate shots, the density is therefore something higher because the binding warp threads cross each other and active forces in the direction of the stop muster.

This effect of the binding warp threads occurs only after every third shot per Goods up once. The binding chain is not able to do so when firing to fix achievable high density. The pole row density is limited.

The object of the present invention is, with the most economical use of pole, Weft and binding warp thread material, with asymmetrical pile handle arrangement and the density of the rows of pole handles ensures a high pull-out strength of double pile fabrics to increase. To ensure adequate Productivity of fabric manufacturing should at least in sections be a two-pronged one Working method and a two-turn pole binding may be possible.

This object is achieved by the combination of the features according to claim 1. The decisive advantage of the procedure defined in claim 1 is in the fact that in almost every tour there is a specialist representation per thread group, which is suitable to increase the density achieved by the reed at the shot fix. Thereby, in the areas of the highest concentration the patterning Pole threads between successive back shots - through the division the binding warp threads of a group on two adjacent warp courses - Crossings of the binding chains within a warp course largely avoided.

Due to the significantly lower density of the shots in the plane of the inner shots compared to that in the level of the back shots - especially at the Attack from inside shots - the effective force component of the setting Binding warp thread can be enlarged in the direction of weaving.

This combination of the solution elements results in a weft or pile row density achieved so far with woven two-speed two-shot bindings was unimaginable. With an appropriate choice of thread materials for Weft threads and for binding warp threads is u. U. a doubling of the density reached.

By arranging the highest shot density in the plane of the back shots serve all pile thread sections lying above this layer with their greater lateral expansion of the design of elastic tread properties, without reducing the pull-out strength of the pole handles. The total pole height can therefore be reduced. A saving of pole material is that Episode.

A significant saving of shot material takes place through the known per se Omitting interior shots instead. Material savings on binding warp threads are effective in that fewer internal shots to the back shots must be bound.

With the modification of the method according to claim 2 are at high density also enables clean pattern contours and a high pattern resolution. On Pattern-changing color of the pile threads is possible in every second tour.

With the design of the binding thread repeat according to claim 3 is sufficient Density with a limited number of shafts and with minimal control effort reached for the shanks.

The method of working according to claim 4 increases the number of opposing technical representatives one binding warp thread group per weft repeat and clearly guarantees one higher pole row density. The limited differentiated integration length of the individual Binding warp threads in a group are automatically the same for most thread materials out. If necessary, the requirements can be met through regular rhythm changes for an even incorporation of the binding warp threads.

The method according to claim 5 is comparable in terms of advantages with those which can be reached by claim 3. You can also use this type of binding work analogously to claim 4 with two pairs of binding warp threads.

The embodiment according to claim 6 does require a higher effort in the Control of the individual shafts, but leads to a higher density and one further reduced material expenditure for the binding warp threads.

The practically measured highest weft density is with the design of the binding thread repeat reachable according to claim 6. Critical crossing points of the binding warp threads especially in the areas of back shots are on two adjacent warp courses distributed. The crossing points of pairs of warp threads, that cross each other in a warp course, we find in the depth range the dead poles or the filling chain. For fixing the shot density, the is achieved in the shot angle, this described is suitable Binding warp repeat in a special way.

Finally, claim 7 shows a binding variant with a larger one Pick repeat. Such a bond leads to further material savings and to an improvement in pedaling comfort.

To design the necessary shot repeat is in a known manner the thread of the respective gripper by control means of the weft scissors submitted or not submitted. On the energetically seemingly cheaper training Coupling of gripper bars from their drive is dispensed with because the necessary Coupling processes at the significantly increased weaving speed in the available time can no longer be reliably controlled. If you equip the weft scissors with a special sensor, you can also be reliable check whether a weft thread is entered in accordance with the specified repeat was or not.

Fig. 1

einen schematischen Querschnitt eines Doppelflorgewebes, bei dem die Schussfäden im Rhythmus ihrer Eintragsfolge angeordnet wurden, bei dem im rechten Bereich die Polhenkel weggelassen wurden und bei dem die Bindekette einen sich über acht Schusseintragszyklen erstrekkenden Rapport ausführt,

Fig. 2

eine Darstellung analog der Fig. 1, wobei sich der Rapport der Bindekette über sechzehn Schusseintragszyklen erstreckt,

Fig. 3

eine weitere Darstellung analog Fig. 1, wobei die Bindekettfäden in anderer Weise als in Fig. 2 einen Rapport über sechzehn Schusseintragszyklen ausführen,

Fig. 4

eine ähnliche Darstellung wie in Fig. 1, wobei die Polfadenwechsel in ihrer kürzesten Folge dargestellt sind,

Fig. 5

einen etwa realen Querschnitt durch den Teppich einer Oberware eines Doppelteppichgewebes in der Bindungsart nach Fig. 3,

Fig. 6

eine Darstellung analog Fig. 5 mit der Bindungsart nach Fig. 1,

Fig. 7

eine Darstellung analog Fig. 5 mit der Bindungsart nach Fig. 2,

Fig. 8

eine Darstellung analog Fig. 5, die eine Ausführung nach dem Stand der Technik zeigt (prior art),

Fig 9

eine Darstellung analog Fig. 5 mit einem weiteren achttourigen Bindekettfadenrapport und

Fig. 10

eine Darstellung analog Fig. 5 mit einem sechstourigen Schussrapport und einem zwölftourigem Bindekettfadenrapport.

The invention will be explained in more detail below using a few examples. In the accompanying drawings:

Fig. 1

2 shows a schematic cross section of a double pile fabric, in which the weft threads have been arranged in the rhythm of their entry sequence, in which the pile handles have been left out in the right area and in which the binding chain has a repeat that extends over eight weft insertion cycles,

Fig. 2

a representation analogous to FIG. 1, wherein the repeat of the binding chain extends over sixteen weft insertion cycles,

Fig. 3

1 shows a further representation analogous to FIG. 1, the binding warp threads executing a repeat over sixteen weft insertion cycles in a different way than in FIG. 2,

Fig. 4

1 shows a representation similar to that in FIG. 1, the pile thread changes being shown in their shortest sequence,

Fig. 5

an approximately real cross section through the carpet of an upper fabric of a double carpet fabric in the weave type according to FIG. 3,

Fig. 6

5 with the type of binding according to FIG. 1,

Fig. 7

5 with the type of binding according to FIG. 2,

Fig. 8

5 shows an embodiment according to the prior art (prior art),

Fig. 9

a representation analogous to FIG. 5 with a further eight-speed binding warp repeat and

Fig. 10

a representation analogous to FIG. 5 with a six-speed weft repeat and a twelve-speed binding warp repeat.

A is used to manufacture the double carpet fabrics described below Double carpet weaving machine with at least two weft insertion levels, with one - Preferably 12-shaft - shaft arrangement for the formation of the binding warp threads and the filling warp threads as well as with an at least three-position jacquard machine for controlling the drive of the pile warp threads for shedding.

This double carpet weaving machine is equipped with a clamping and cutting device for the weft, which is also able to weft a Submitting or not submitting the gripper of a weft insertion system. she is also equipped with a sensor that monitors whether a weft thread was entered according to the rapport RS or not.

1, the shots SR, SI are starting from the left in in the order shown. Shots on top of each other entered at the same time.

In the first tour, the back shot SR1 is entered in the upper fabric WO and the inner shot Sl2 in the lower fabric WU. In the following tour the back shot SR1 individually in the underwear WU and then also individually the back shot SR2 entered in the upper WO. In the last tour of the Shot reports RS, two shots are entered again at the same time. The of the basic fabric, the binding warp threads are on two adjacent ones Warp courses K1, K2 distributed. To do this, we can see that every back shot SR by a representative of a binding warp thread B1 of a group in the direction of the stop is fixed.

The relations between the repeat RB of the binding warp threads B and the repeat RS of the weft threads S are always retained in every double carpet fabric. The The size of the repeat RB is always an integer multiple of the repeat RS of the weft S.

The binding of the outer fabric WO produced according to this scheme is in FIG. 6 shown again in an approximately natural section in the plane of the warp course 1. The filler chain F and the group of dead poles PT belonging to the respective warp course belong, are in the background and are therefore shown in dashed lines. The patterning pile handles are located directly in front of these warp threads F, PT PM of the warp course K1, which all bind via back shots SR1, SR2.

It can be clearly seen that in the two adjacent warp courses K1 and K2 only one of the binding warp threads B11, B15 of a pair actually the legs the pole handle (PM) between the back shots SR1 and SR2, the space of the highest pile thread concentration. The legs of the pole handles have more space to spread sideways in the available gap.

A section of binding warp thread that is used in one tour from the back weft SR to the Inner weft SI changes, extends only parallel to the pile thread legs between the back shots SR1 and SR2. This will make additional Space available for lateral deflection of the pile thread legs. The majority of the crossing points between binding warp threads B1 (x) of a group is located on the outside of the SR back sections or on the inside of the inside sections SI. Other crossing points within a warp course K1 are in Area of the dead poles PT. They do not limit the pile row density of the fabric.

Crossing points of binding warp threads that are the narrowest area between back wefts tangent, consist regularly of binding warp threads of both warp courses K1, K2. This also does not limit the pole row density. Is clearly visible from 6 also shows that each back weft SR is made up of a binding warp thread B1 is pulled to the previously formed basic goods. This ensures that the density of the fabric created by the reed by a specialist The binding warp thread of each group is fixed with almost no loss.

Finally, from the strong bending of the binding warp thread B11 on the back weft SR2 recognizable that the resulting force acting on the back shot SR2 is a sufficiently large component in the stop direction for securing of density and an approximately equally large component for generating one Has friction between the weft and the filling chain. The natural Expansion efforts of the pile threads occur after the reed has been lifted off sufficiently large resistance opposed.

Of particular importance - especially when striking the inside shot SI - that the density between the inner wefts SI is significantly less than the density between the back shots SR. This allows the SI compared to the previously recorded back shot SR of the same product WO, WU take a position further in the direction of the stop when striking and the back shot (s) previously entered again and pull effectively in the direction of the stop.

It can be seen from all these facts that this bond has a high pole row density allows. This also results in a clear, less ribbed back image of the pile fabric.

In the binding according to FIG. 1, the binding warp threads are the individual warp courses K1 and K2 can also be assigned in a different way. It is possible to use the same type binding warp threads B11 and B12 binding to the weft repeat; B13, B14 one first warp course K1 and the binding warp threads B15, B16; B17, B18 a second Assign warp rate K2. This eliminates double ties of the binding chains on the back. On the other hand, intersection areas arise, which are the areas of highest density of the pile thread legs between the back shots at least tangent.

2 differs from the representation according to FIG. 1 due to the reduced number of binding warp threads B2 in upper goods WO and WU base fabric and the size and design of the repeat RB2 Binding warp threads B21, B22 of the upper material WO and the binding warp threads B23, B24 of the Bottom fabric WU. The repeat RB2 of the binding warp threads B2 extends over sixteen Weft insertion cycles in every product WO, WU.

Follow for the representation of the weave course of the individual warp threads we use the B21 binding warp thread of the WO upper material. The B21 binding warp thread begins left outside with a binding on the inside weft Sl1, then changes to the next tour outside via the back shot SR1 of his goods (WO) before he after passing under a next SR2 back shot after another three Tours binds back inside via the next inside shot SI1. From there he switches back to the level of the back shots SR.

After the following binding outside via the back weft SR is the binding warp thread stretched between another two back shots SR and one in between entered inner shot SI, being in the plane of the Filling chain F is arranged. This phase serves as rhythm change W211. In the Episode he ties only in plain weave around SR back shots before in the seventh tour he is led inside over the inner shot Sl1 and so that the new repeat RB2 begins.

The type of binding of the second binding warp thread B22 of the upper material WO is - .related to the rhythm - identical to the first B21 binding warp thread. The Binding elements, however, are around eight tours or weft insertion cycles executed offset to each other. Each binding warp thread B21, B22 has in its Repeat section two exchange points W212 and W211 or W221 and W222. In there is a change of rhythm in these sections. This rhythm change is necessary to make the necessary connections within a repeat RB Execute inner wefts S1 with only one binding warp thread B21, B22 and at the same time the binding length of all binding warp threads B21, B22 within one Keep the RB2 twine repeat at a uniform size.

The binding warp threads B21, B22, B23, B24 which carry out this repeat can be used for Upper goods WO and for lower goods WU are pulled from the same warp beam. The binding thread repeat RB2 in the lower fabric WU is preferably symmetrical and offset by a tour to repeat RB2 of the Oberware WO.

The goods manufactured according to this binding scheme are in one form in FIG. 7 shown that comes very close to the real bond. The binding warp thread is B22 drawn in dashed lines. This means that the K2 assigned.

It is particularly clear in FIG. 7 in which areas between the Back shots SR1 and SR2 have the highest concentration of pile yarns. It can be seen that in the majority of the gaps per chain course maximum a binding warp thread (B) crosses the pole legs. The binding warp thread is B21 twice individually aligned with the pole legs, once there are two sections the B21 binding warp in the same alley.

The multiple plain weave with the final binding over the inner weft Sl1 ensures a largely loss-free fixation of the stroke density in the level of the back shots SR. Every back shot is through a professional representative a binding warp thread B2 of the group to the previously produced fabric and the filling chain F pulled. The result is a high pole row density.

The four pole legs are regularly located between two inner sections SI the pole handle binding over the back shots SR. Their density is in the plane the internal shots Sl significantly lower than in the level of the back shots SR, where the number of shots is twice as high. This inside shot SI are hardly deflected by the binding warp threads B21 and B22. The buttocks protrude vertically from the basic product WO. They are shot through the inside SI flexibly supported and thus ensure a high level of comfort and convenience good recovery ability of the pole layer after exercise.

FIG. 3 shows the schematic bond image of a further type it except the repeat RB3 of the binding warp threads B31, B32, B33, B34 opposite the 1 shows a complete match.

The repeat RB3 of the binding warp threads B31, B32, 833, B34 extends in the upper fabric WO and WU base fabric over sixteen weft insertion cycles each. The The course of the binding warp threads B31, B32, B33, B34 and their repeat RB3 is based on the binding warp threads B3 of the upper WO described. The binding warp threads B31, B32 are arranged in a first warp course K1. The binding warp threads B33, B34 (Dash-dot or dash-dot-dot) are in the one behind Warping course K2. The binding program of these two pairs of binding warp threads is over four weft insertion cycles offset from each other. The binding program of the Pair of binding warp threads B31, B32 / B33, B34 is around eight weft insertion cycles offset from each other.

The form of the integration is described using the B31 binding warp thread. First, it ties (top left) in the upper compartment without contact over the inner weft S11 and first tangentially crosses the back shot SR1. During the following two single shot entries SR4 and SR2 he remains in the upper outer compartment and finally embraces the rear shots SR1 and SR2 as a couple. This binding warp thread crosses the following inner weft SI still without contact outside. After that, he stays within the level of the back shots, before crossing the inside shot SI on the fifth tour. In the The following seven tours he switched between back shots and inside shots remaining, back in the outer compartment and crossed in the eighth tour the back weft SR1 and thus begins the new binding thread repeat RB3.

The binding warp threads B32 of the same warp course and the binding warp threads B33 and B34 arranged in the warp course behind are. The repetitions of the group's binding warp threads are thus in relation to one another Warp direction offset that finally all back shots SR and all inside wefts SI are bound from the outside or inside.

The binding warp threads B33 and B34 of the second warp course K2 cross in the Level of the back wefts the binding warp threads B31 and B32 of the first warp course K1. However, their distribution in different warp courses K1, K2 is avoided an excessive restriction of the space for the pole legs in the plane of the Back shots SR, where the highest pile thread concentration is given.

The crossing points of the binding warp threads B3 within a pair of binding warp threads B31 / B32 and B33 / B34 are regularly located in the inner area of the Goods WO or WU. They are thus clearly shifted from the zone of the highest compression of the patterning pole legs in the plane of the back shots SR. Pairs of back wefts SR, between which binding warp threads B3 are completely missing, together through a specialist representative of a B3 binding warp thread pulled against the previously compressed tissue and fixed in the stroke density.

With this type of binding according to FIG. 3 one can - proven by tests - in Depending on the thread quality and its strength in a carpet fabric up to to reach 150 rows of poles per decimeter (150 / dm). The bonds after the Figures 1 and 2, however, leave pole row densities between 100 / dm and 130 / dm to.

The approximately real design of the thread combinations in this fabric according to Fig. 3 is shown in FIG. 5. The crossing points of the binding warp threads B31 and B33 as well the binding warp threads B32 and B34 are all in the range of the highest Concentration of pile threads between back shots. However, you are here only present individually because they are in different warp courses K1, K2.

The crossing points of the binding warp threads B31 / B32 or B33, B34 are the same Chain rates K1 and K2 are, without exception, clearly outside the level of SR back shots and thus do not affect the pole row density.

This bond is of particular importance for a high pole row density the almost symmetrical diagonal arrangement of the sections of the binding chains between back and inside weft. This ensures a symmetrical load of the inner shot Sl and supports the vertical alignment of the pole legs.

On the one hand, all requirements are met that the pole legs are vertical stand out from their basic goods. On the other hand, in the warp direction and in Sufficiently large force components to maintain the direction of the filling chain Density of the tissue present in the plane of the back shots, so that by the combination of all influencing factors possible extreme values of the pole row density become.

For comparison, the closest bond is shown in FIG. 8 in the same way, which the state of the art offers. By positioning the back shots SR8 and intermediate shots SZ8 outside and inside the filling chain 8 highest concentration of pile threads between weft threads in the plane of the Intermediate shots SZ8 and in the level of the inner shots SI8 reached. In these There are four pole legs on each level, the cross section of the intermediate shot SZ8 or the inner shot SI8 and an intersection or sections of the Binding warp threads B81, B82.

The binding warp threads fixing the intermediate weft SZ8 in the stop direction can only exert a limited force in the direction of the stop, so that between the two intermediate shots as well as between the inner shots stretch the lying pile thread leg after the stop. The at The density of the weft threads reached cannot be obtained in this way. In The binding warp threads of a group carry only one for each weft thread repeat only professional representative. The density of the finished carpet fabric is clear lower than z. B. that of the fabric shown in FIG. 5 or in FIG. 7.

Another disadvantage of the binding according to FIG. 8 is that the tufts of poles between leave the binding of the basic goods at a slight incline. This Inclination arises from the fact that the intermediate shot has the pole legs under the Back shot deflects in an arc. This tendency becomes greater the denser one weaves the double carpet fabric.

The fabric described in relation to FIG. 8 has other crucial ones Disadvantage. It is practically not possible between a back shot and SR8 an intermediate shot SZB to change the pile thread. Regularly individual pole legs would be missing there. The already lower pull-out strength of pole handles on an intermediate shot (approx. 50%) is still in this case significantly less.

So that at least one patterning pile thread is visible on the back Manufacturer of the weave suggested that the change of pile thread only in the area to perform a back shot. Each pattern point thus contains in the warp direction four pole legs and a pole handle that ties over the back shot visible on the back. This significantly limits the pattern options, because the pattern resolution compared to the two-speed two-shot bindings is only half the size.

With the present invention, each shooting a pole handle Back shot is, a change of pile thread can be realized in every second tour. Examples of this are shown in u. a. 4, in which a large number of variants for one such a change of pile thread is shown.

The pile threads PM41 to PM44 are involved in the change of pattern shown. Of Starting on the left, the PM 41 pile thread is patterned in the usual way in a two-shot weave. In this area, the PM42 pile thread is prepared by a bond inside on the inside shot SI41 on its pattern, which, finally, on SR41 back shot in the WU base fabric begins. After binding over the Back weft SR43 in the upper and over the weft SR42 in the The bottom fabric ends its patterning in the dead pole strand PT of the bottom fabric WU.

The PM42 pile thread is replaced by the PM43 pile thread from the outer fabric WHERE. He starts his pattern over the back shot SR44, crosses the Back shot SR45 of the lower fabric WU and the back shot SR46 of the upper fabric WHERE. Then it is fed back into the strand of the dead poles PT.

During the patterning of this PM43 pile thread, the PM44 pile thread was through a binding is prepared on the inside via the inner weft Sl43. The pile thread binds then looking over the back shot SR46, the back shot SR47 and finally over the SR48 back shot of the upper fabric. Because the back shot SR48 is followed by an inner weft SI44, the binding of this pile thread PM44 "being stopped. Finally, it is then returned to the dead pole line.

As we can see from the dead pole strand of each product, the upper and the Bottom fabric, remove a pile thread and without mixing contours as a pattern Tie off the pile thread. The way the warp threads are guided plays a role this process doesn't matter. It is important that each pole handle carries Shot is a back shot.

9 shows a further binding variant for the binding warp threads B91 B92 demonstrated. The RS9 weft repeat extends over four weft insertion cycles. The repeat RB9 of the binding warp threads B91, B92 is repeated after every eight Tours. The two binding warp threads B91, B92 of a group are on two warp courses K1 or K2 distributed. The binding warp thread B91 coming from an inner weft SI crosses the first SR back shot one by one, then passes under the following ones Back shots before he crosses another back shot and outside finally, the repetition ended bindingly on the inside weft. The binding warp thread B92 carries out the same binding with four tours offset.

The invention is not restricted to the use of a four-speed shot repeat SR. It is quite possible to add this repeat by adding more Enlarge single-shot pairs. This will make the ratio between the number the back shots SR and the number of inside shots SI even more differentiated. A limit is only set by the need for supporting internal shots SI.

FIG. 10 shows an example of a shot repeat that has been enlarged in this way. The shot repeat RS10 extends over six weft insertion cycles. The rapport RB10 the binding warp threads B101, B102 are repeated after every twelve tours. The two binding warp threads B101, B102 of a group are on two warp courses K1 and K2 distributed. The B101 binding warp thread coming from an inner weft SI crosses outside a pair of SR back shots, then passes under the following three Back shots before he crosses another back shot and outside finally, the repeat RB10 is finished on the inside by binding. The Binding warp thread B102 carries out the same weaving offset by six turns.

LIST OF REFERENCE NUMBERS

B

Binding chain, (general)

B1, B2, B3, B8, B9, B10

Binding chains of Figures 1, 2, 3, 8, 9, 10 (the following numbers are ifd. Digits of the binding chains of the same figure)

F

filling warp

K1

Warp rate (front) also appended to B reference numbers

K2

Warp rate (behind) also appended to B reference numbers

P

Pile thread (general)

PT, PT8

Totpole

PM, PM8

Pole, eyeing, pole handle

PM4

Pin threads, patterning, of Fig. 4 (subsequent digits mean the order within the figure)

RB

Repeat, binding warp threads (subsequent numbers denote the figure; following digits an order within the figure)

RS

Repeat of the weft threads (four weft insertion cycles)

RS10

Repeat of the weft threads (six weft insertion cycles)

SR

Back shot, general (appended digits mean one Order in Figures 1 to 3 and 5 to 7)

SR4

Back shots of Figure 4 (subsequent numbers mean the Order within the figure)

Sl, Sl1, Sl2

Internal wefts (general -> 1 upper fabric; 2 lower fabric)

sl4

Interior shots of Figure 4 (subsequent numbers mean the Order within the figure)

SR8

Back shot, Figure 8

SZ8

Intermediate shot, Figure 8

sl8

Shot inside, Figure 8

W

Rhythm change (general)

W2

Change of rhythm of Figure 2 (in the attached pair of digits the first digit means the assignment to the binding chain and the second digit a running digit)

WHERE

top web

WU

under goods

Claims (8)

Process for producing a double-pile fabric on a double-pile weaving machine with at least two weft insertion levels,
using weft threads (SR and SJ), filling warp threads (FK) and groups of binding warp threads (B) for the formation of an upper and a lower base fabric (WO, WU)
as well as choirs of pile threads (PM, PT) per warp course for the formation of a patterned, separable pile layer made of patterned pile threads (PM) and for the filling of the basic goods through the non-patterning pile threads Totpole PT), which are integrated between the back sections and inside sections, the weft threads (SR) in an at least four-speed repeat at least twice in pairs as a back shot (SR3, SR1) in a first basic product (WU, WO) and as an inner shot (Sl1, Sl2) in a second basic product (WO, WU) and two, four or six times individually as a back shot (SR4, SR2) alternately in one of the two basic goods (WU, WO), wherein the respective patterning pile threads (PM) are stretched exclusively between the back wefts (SR1, SR2) of the upper fabric (WO) and the back wefts (SR3, SR4) of the lower fabric (WU) and
the binding warp threads (B) of a group crossing one another in the region of the highest pile thread concentration between successive back shots (SR1, SR2; SR3, SR4) are distributed over two adjacent warp courses (K1, K2) and
wherein the binding warp threads (B) of a group within one weft repeat (RS) successively carry out at least twice a specialist representation - distributed over the adjacent warp courses (K1, K2). A method according to claim 1, characterized in that when changing the pile thread according to the pattern, the pile thread (PM41, PM42, PM43, PM44) beginning and ending with the pattern binds for the first and last time around back shots (SR) of its goods (WO; WU). Method according to claim 1, characterized in that in the case of a four-speed repeat (RS) of the weft threads, the complete repeat (RB1) of the binding warp threads (B11, B12) extends over eight weft insertion cycles and
that the group of binding warp threads (B1) of each item (WO, WU) consists of two binding warp threads (B11, B12), which - offset by four turns - each have a pair of adjacent back wefts (SR1, SR2) on the outside and immediately afterwards an inside weft ( SI1) grasp individually on the inside. Method according to claim 1, characterized in that in the case of a four-speed repeat (RS) of the weft threads, the complete repeat (RB1) of the binding warp threads (B11, B12) extends over eight weft insertion cycles and
that the group of binding warp threads (B1) of each product (WO, WU) consists of two binding warp thread pairs (B11, B15; B12, B16), whose binding warp threads (B11.B15, B12, B16) - offset by two tours - one pair each Grip adjacent back shots (SR1, SR2) on the outside and then one inside shot (Sl1) individually on the inside. A method according to claim 1, characterized in that in the case of a four-speed repeat (RS) of the weft threads, the complete repeat (RB9) of the binding warp threads (B91, B92) extends over eight weft insertion cycles and
that each binding warp thread (B91, B92) of each product (WO, WU) in each repeat (RB9) one back weft (SR) outside, two back wefts (SR) inside, again one back weft (SR) outside and finally one inside weft (SI) inside embraces. Method according to claim 1, characterized in that in the case of a four-speed repeat (RS) of the weft threads, the complete repeat (RB2) of the binding warp threads (B) extends over sixteen weft insertion cycles and
that each binding warp thread (B21, B22; B23, B24) of a product (WO, WU) per repeat (RB2) first one back weft (SR) outside, one back weft (SR) inside, one inside weft (SI) inside, another back weft ( SR) outside, two back shots (SR) inside, then three back shots (SR) outside, inside and again outside and finally the following inside shot (SI) embraces inside. Method according to Claim 1, characterized in that, in the case of a four-speed repeat (RS) of the weft threads, the complete repeat (RB3) of the binding warp threads (B) extends over sixteen weft insertion cycles,
that the group of binding warp threads (B3) consists of four binding warp threads (B31, B32, B33, B34) which are assigned in pairs (B31, B32 / B33, B34) to two adjacent warp courses (K1, K2),
that the binding warp threads (B31, B32, B33, B34) of a product (WO, WU) within a repeat (RB3) each embrace a pair of back wefts (SR1, SR2) on the outside and - at a distance from it - an inner weft (SI) individually on the inside , A method according to claim 1, characterized in that in the case of a six-speed repeat (RS10) of the weft threads, the complete repeat (RB10) of the binding warp threads (B10) extends over twelve weft insertion cycles and
that each binding warp thread (B101, B102) of each product (WO, WU) in each repeat (RB10) first a pair of back wefts (SR) outside, three back wefts (SR) inside, another back weft (SR) outside and finally an inside weft ( SI) encompasses inside.

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