EP0612874A1 - Method and device for making a double-carpet - Google Patents

Abstract

The invention relates to a method and a device for making a double carpet fabric, with weft threads (S3,S4;S2,S1) inserted in pairs into the upper cloth and the lower cloth, with pile threads (OP,UP) which are distributed as dead piles over the two cloths, are tied according to a dead-pile control programme and can be alternately assigned to a pattern-pile control programme according to the particular pattern. With the aim of making a cloth of high pile density which is free of mixed contours, the weft threads (S3,S4;S1,S2) are assigned alternately in pairs to the upper cloth and the lower cloth, the pile-thread change is carried out between pile threads consisting of different materials, when the last-patterning pile thread (OPM,UPM) is located in its outer shed, the two pile threads are held in the respective outer shed over the period of shed entry and are assigned there to the other control programme for pile threads (OP,UP); and the pile-thread change takes place between pile threads consisting of identical materials in such a way that a respective pile thread (OP,UP) of the interchanging pair is held in the outer shed for the next pass, and the other pile thread (UP,OP) changes between its own middle shed (3) and the foreign outer shed (1,2). <IMAGE>

Description

The invention relates to a method and an apparatus for producing a double carpet fabric, with weft threads registered in pairs in the upper and lower goods, to which binding warp threads are assigned per product, with pile threads, which are distributed as dead poles on both goods, each between the back - And inside shot, according to a dead pole control program, which specifies changing positions between two mutually adjacent subject levels, are integrated and which can be assigned to a sample pole control program in alternating fashion, the pile thread change being triggerable from all subject levels before a selected subject change.

EP 459 582 shows a double carpet fabric in which the weft threads are inserted in pairs in the usual way. This means that one shot of the upper fabric and one shot of the lower fabric are assigned to each tour.
The dead poles are also assigned to both goods in the usual manner in each gap in the reed.

The change of pile thread between pile threads of different goods takes place in such a way that the pile thread that was previously patterned last looks over the back weft of the foreign goods and is fed from there to the central compartment of its goods; while the re-examining pile thread starts patterning from its central compartment over the back shot of its foreign goods.

With this procedure, clear mixed contours cannot be avoided at this point.

On the other hand, the pile density in the warp direction is limited, because in each of the two goods between two successive back shots, via which the respective pattern pile thread binds, an inner weft must be entered.

Due to these shortcomings, such a binding - with mixed contours and low pile density - can only be used for carpets in the lower price ranges.

From DE OS 22 53 262 a double carpet fabric has become known in which the weft threads entered in pairs in two compartments at the same time are assigned to the upper fabric and in the next tour to the lower fabric.

The dead poles and the filling chain, also called stems, are each bound between the weft threads of a pair.
The weft threads are fixed in the usual way by a pair of binding warp threads per product.

The dead poles of a choir are spread over both goods. (Fig. 5) For changing the pile thread, depending on the available jacquard machine, it is intended to assign the pile thread patterning up to that point to the dead poles of its goods via an inside weft and to tie the new patterning pile thread for the first time via a back shot of its own goods.

The return and reintroduction of a new or old patterning pile thread via a back shot is also shown, without any reference to a specific rule.
The result of such an arbitrary type of pole change, predominantly determined by the jacquard machine used, are faulty poles of a larger size or double poles.

The double poles are recognizable as the dreaded mixed poles. They significantly affect the quality of the carpet. Wrong poles are noticeable through a reduced pile layer thickness at the pattern boundaries.
To avoid these disadvantages, it was already proposed in the patent mentioned to assign all the pile threads associated with a reed gap, the chorus, to a single item and to position the pile threads of the immediately adjacent reed gap in the opposite item.

This measure made it possible for the last time to pattern the pile threads to be patterned over the back weft in order to guide the new pattern pile pile to the other goods via an internal weft of one's own goods.

This completely avoided bad poles. Double poles and mixed contours also did not occur.
However, it was seen as a disadvantage that the alternating arrangement of all dead poles in one commodity, however, disadvantageously changed the overall product image of both commodities. The carpet fabric became streaky on the back and also on the pole side.
The pattern of the carpet was significantly disturbed on the visible pole surface.

It has been found that in order to ensure a uniform surface of the pile fabric, an almost uniform distribution of the dead poles on the goods and all gaps in the reed remain an imperative. On the other hand, the wrong poles and / or double poles, as well as the associated mixed contours, must be avoided.
It is also assumed that the pole handles are integrated in the goods so that the legs of the pole handles, supported as positively as possible, protrude approximately vertically from their goods.

The object of the invention is therefore to propose a method for producing a high-quality, dense double carpet fabric of the type defined in the introduction, that while maintaining the distribution of the dead poles per gap gap on both goods and while maintaining the form-fitting, vertical integration of the pole handles, the pole changing points are free of Wrong poles, double poles, mixed contours and double pole binding points on the back of the pile fabric.

According to the invention, this object is achieved by the method steps defined in claim 1.

The combination of the known, paired weft entry alternating in the upper fabric and the lower fabric with the defined shape of changing the thread surprisingly leads to the fact that in addition to the high density of the poles in the warp direction, clean pattern contours can also be guaranteed. No double, two-tone handles are visible on the back of the carpet.
The process is therefore particularly suitable for the production of high-quality carpet fabrics.

The differentiated guidance and control of the pile threads during the change of pile threads, depending on the ratio of their assignment to the individual goods, guarantees a mixed-contour-free change of pile threads when using an appropriate jacquard machine.
This can also be guaranteed on a regular basis when changing between pile threads from different goods.

The two-speed production of this double carpet fabric also allows the production of the carpet with high productivity and at the same time ensures that the pile legs on the pile side emerge from their goods almost vertically.

The pile surface of the carpet thus remains elastic and can recover more quickly even after heavy use.

The execution of the method according to claim 2 enables the implementation of the method with conventional three-position jacquard machines.

The four-speed pattern selection, according to claim 3, allows a sufficient number of supported pole pieces of the same color to be available, even when setting a single pattern point.

With the embodiment according to claim 4, optimal support of all poles is guaranteed.

The method defined in claim 5 shows one possibility of saving pole material with small concessions on the support effect for the poles, by having every second patterning pole tied off by means of an inner weft.

This pole handle tied via the inner weft is supported in the warp direction directly on the legs of the adjacent pole handles tied over the back. The latter pole handle is also supported by its inner weft and ensures that with sufficient weft density all pole handles are positively guided, protrude vertically from their goods (claim 6).

If one positions the pile thread change between two pile threads binding to the back of both goods in the manufacture of such a product according to claim 6, the optimum pile thread change according to claims 1 and 2 can be realized.

If one chooses the area of the pile threads binding to the inner weft for changing the pile thread in this binding Repeat according to claim 7, then the control of the pile threads during the changing process according to claim 8 is appropriate.
A missing pile thread leg per change process is of no importance given the high pile density.

If you still want to save the back binding without binding, you have to realize the control of the binding chains according to claim 9.

To carry out the method according to the invention, the double shed weaving machine should be equipped with a jacquard machine as defined in claim 10.

But it is also possible to use a mechanical jacquard machine known per se and to equip it in all specialist levels with so-called dead pole feeders or sample pole feeders, which, similar to the function of the board base, keep the position of the boards over the compartment formation or move according to the instructions of claim 1.

Fig. 1:

einen schematischen Querschnitt durch die erfindungsgemäße Ware, bei der alle Musterpole über den Rückenschuß binden,

Fig. 2:

ein Fachbildediagramm für die schaftgesteuerten Fadensysteme,

Fig. 3:

einen realen Querschnitt durch eine der beiden Waren,

Fig. 4:

eine vereinfachte Schnittansicht IV-IV zu Fig. 3,

Fig. 5 bis 8

eine schematische Darstellung des Polfadenwechsels bei unterschiedlicher Herkunft der gegeneinander wechselnden Polfäden,

Fig. 9:

eine schematische Darstellung eines Doppelpolgewebes, bei der nur jeder zweite Pol pro Ware über einen Rückenschuß bindet,

Fig. 10:

ein Fachbildediagramm für die schaftgesteuerten Fadensysteme zu Fig. 9,

Fig. 11:

einen realen Querschnitt durch eine der Waren nach Fig. 9 und

Fig. 12:

eine Schnittansicht XII-XII zu Fig. 11.

Fig. 13 bis 16

eine schematische Darstellung des Polfadenwechsels bei unterschiedlicher Herkunft der gegeneinander wechselnden Polfäden - bezogen auf ein Doppelteppichgewebe nach Fig. 9 - und

Fig. 17

eine schematische Darstellung einer Jacquardmaschine, die zur Realisierung der Erfindung geeignet ist.

The invention will be explained in more detail below using exemplary embodiments. In the accompanying drawings show

Fig. 1:

2 shows a schematic cross section through the goods according to the invention, in which all the pattern poles bind via the back shot,

Fig. 2:

a technical diagram for the shaft-controlled thread systems,

Fig. 3:

a real cross section through one of the two goods,

Fig. 4:

a simplified sectional view IV-IV to Fig. 3,

5 to 8

1 shows a schematic representation of the change of pile thread with different origins of the pile threads alternating with one another,

Fig. 9:

1 shows a schematic representation of a double-pile fabric, in which only every second pile per item binds via a back weft,

Fig. 10:

9 shows a shed diagram for the shaft-controlled thread systems in FIG. 9,

Fig. 11:

a real cross section through one of the goods of FIGS. 9 and

Fig. 12:

a sectional view XII-XII to Fig. 11th

13 to 16

is a schematic representation of the pile thread change with different origin of the pile threads alternating with each other - based on a double carpet fabric according to Fig. 9 - and

Fig. 17

is a schematic representation of a jacquard machine, which is suitable for realizing the invention.

The double carpet fabric consists of an upper fabric O and a lower fabric U which are connected to one another by pattern poles PM which change according to the pattern.

Following the weaving process, it is separated between upper fabric O and lower fabric U in the area of the pattern poles PM.
This creates two almost identical carpets.
The non-patterning pile threads OP, UP are distributed on the upper fabric O and the lower fabric U. They are each guided between a back shot S1, S3 and an inner shot S2, S4, the two in pairs registered wefts per product with the help of binding warp threads OB1, OB2; UB1, UB2 are held together.

Parallel to the dead poles, a filling chain OF, UF is inserted into both goods, the upper goods O and the lower goods U.
1, the thread systems, in particular the binding warp threads, OB, UB are controlled in such a way that the weft threads S1, S2; S3, S4 can be attached alternately once to the upper fabric O and once to the lower fabric U.
The binding chain is located over three tours in the outer compartment of your own goods and changes in one tour into the outer compartment of the other goods and back again.
In the last tour, the inside shot is tied up. The two binding warp threads OB1, OB2; UB1, UB2 of a product carry out the described binding repeat to each other by two tours.

In Fig. 3, half of the double carpet fabric, which then represents a carpet, is shown in almost real proportions.

It can be clearly seen that the inner wefts S2, S4 realign the pole handles PM at a distance from their binding point on the back wefts S1, S3 and, together with the adjacent inner wefts, support the adjacent legs of the poles and lead vertically from their goods to the surface of the carpet .

In the weft direction, these pile legs are supported by the binding warp threads through the dead poles, so that there is also a positive guidance of the pile handles in this direction.

5 to 8 show the necessary variants of changing the pile thread depending on the origin of the respective pile thread P according to the algorithm of the main claim of the invention.
The change level is marked with "W".

5, a previously patterned pile thread OPM from the upper fabric O is replaced with a pile thread UPM from the lower fabric.
In the fourth tour of the previous binding report, the pattern pole OPM assigned to the upper fabric is located in the outer compartment of the upper fabric or in the high compartment 1. In the same tour, the dead poles OP of the upper fabric are in the middle compartment 3 and change to the high compartment at the following specialist representative 1 of own goods O.

In the fourth tour of the first repeat, the dead poles UP of the lower goods are in the deep compartment 2. You switch to the middle compartment 3 in the following tour.

When the patterning pole is exchanged, the patterning pole thread OPM, which is located there, is held in high level 1 and transferred to the control program of the Totpole OP of the upper fabric O after the change of subject in the following tour.

In the VI.tour, the pile thread UP of the lower fabric, which was previously used as a dead pole, is selected.
He will be held in deep compartment 2 during the technical representation and will be handed over to the control program for the model poles PM in the following first tour.
A pole leg is omitted at the pole thread changing point W, but this does not influence the appearance of the pole surface in any way.

Fig. 6 shows the change of a pile thread OPM of the upper fabric against another pile thread OPM 'of the upper fabric.

The first patterning pile thread OPM is again held in high compartment 1 and transferred to its dead pole control program OP in the following first tour.

The new pattern pole OPM 'from the outer fabric is selected in the middle compartment of the VI.Tour, transferred to the deep compartment 2 at the specialist agency and handed over there to the pattern pole program PM.
With this type of change there is no missing pole leg.

When changing between pile threads UPM, UPM 'of the lower fabric - FIG. 7 - the procedure is analogous to FIG. 6. Here, too, there is neither a missing pole leg nor a double pole.

The change of a pile thread UPM of the bottom fabric U against a pile thread OPM of the top fabric according to FIG. 8 takes place here at the border between III. and the IV. tour of the first pile binding report.

In the third tour, the UPM pile thread of the bottom fabric, which has been patterning up to that point, is located in its outer compartment, can be held there beyond the specialist agency and is transferred to the dead pole control program UP in the fourth tour.

The new patterning OPM pile thread of the upper fabric is selected in high compartment 1 and at the transition from III. held during the IV. tour during the technical representation and handed over to the model pole control program PM in the IV. tour. On the border of the III. a single pole leg is missing for the fourth tour.
The second binding variant is shown in Fig. 9. It differs from that in FIG. 1 only in that every second pole handle PM per item is tied not via the back weft S1, S3, but via the inner weft S2, S4.

This has advantages in terms of pile thread consumption and has almost no impact on the quality characteristics of the pile surface.

Here, too, the pole legs of mutually adjacent pole arms PM, which have additional guidance through the inner sections S2, S4, are supported against one another in the warp direction. In the weft direction, the binding chain B acts as an additional guide for the pole handles bound to the inner wefts.

With this double carpet fabric, the pile thread is expediently changed from the high compartment 1 to the deep compartment 2 during the representation of the model pole.

However, it is also possible to implement the technical representation and thus change of pile threads between the two pile threads PM patterning on the inner weft S2, S4. If the pattern pole UPM that is to be removed comes from the lower fabric U, then the pattern pole must be selected in the previous III.tour in the deep compartment 2, held and assigned to its dead pole control program UP in the last tour IV of the repeat (Fig. 16).

In summary, it can be stated that the poles which change according to the algorithm of the main claim neither adversely affect the appearance of the back of the carpet nor the surface on the pile side in any way. With an appropriate weft density, clear pattern contours are guaranteed.

The pole surface is elastic and voluminous in every respect.
After an extreme load, the poles may straighten up with the help of a brush and remain in this upright position.
In the variant according to FIG. 9, some pole material is saved due to the shorter pole handles, which has an advantageous effect on the production costs.

It should be noted that the dead poles OP, UP and the filling chain OF, UF are almost stretched in their goods and thus the pile thread consumption can be further reduced.

The device for carrying out the method must ensure that the pile threads can be selected simultaneously in all specialist levels and can be assigned to the other control program OP, UP, PM in the following tour.

To change the pile thread from the bottom fabric, the selection described should be able to be advanced one tour.

This control of the strands 5 guiding the pile threads can be realized by an electronically controllable jacquard machine, which has two roller trains 61, 62 for each strand 5 and the two roller trains 61, 62 each have two sinkers 71, 72; 73.74 can be assigned. These boards 71 .... 74 can be individually locked in their uppermost position with the aid of ratchet levers 91 .... 94 which can be controlled by magnets 81 .... 84.

Such a jacquard machine is on the market. Your controller is programmable in the usual way according to the method defined in claim 1.

Claims (10)

Process for the production of a double carpet fabric,
with weft threads inserted alternately in pairs once the upper (O) and once the lower (U), - to which warp threads (OB, UB) are assigned per item (O, U), with pile threads (OP, UP), - which are distributed as dead poles on both goods (O, U), - each between the back and inside shot, according to a dead pole control program, - which specifies changing positions between two adjacent subject levels, are involved and - which can be alternately assigned to a sample pole control program, the pile thread change (W) can be triggered from all subject levels (1, 2, 3) before a selected change of subject, characterized,
that the change of pile thread (W) between pile threads from different goods (O, U) - then executed when the last patterning pile thread (OPM, UPM) is in its outer compartment (1,2), and - During the change of pile thread, the last pile thread to be examined and the pile thread newly selected for patterning - held in the respective external subject (1, 2) over the period of the technical representative and - be assigned to the other control program for pile threads (OP, UP) in the next tour; and that the change of pile thread (W) between pile threads of the same goods (O, O; U, U) is carried out in such a way - That a pile thread (OP, UP) of the mutually changing pair is held for the next tour in the outer compartment and - That the other pile thread (UP, OP) changes between your own middle compartment (3) and the foreign outer compartment (1,2). A method according to claim 1, characterized in
that the change of pile thread (W) between pile threads (OP, UP) is carried out from the same goods when the last pattern pile pile is in its own outer compartment (1, 2). Method according to one of claims 1 or 2, characterized in that
that the binding repeat of the pile threads (OP, UP), including the pile thread change (W), extends over four tours (I to IV). A method according to claim 1 to 3, characterized in
that all patterning pile threads (OPM, UPM) are tied via a back weft (S1, S3). A method according to claim 1 to 3, characterized in
that in a binding report per item (O, U) one pole handle is tied over the back weft (S1, S3) and one pole handle over the inner weft (S2, S4) A method according to claim 1 to 4, characterized in that
that the pile thread change (W) takes place in the area of the technical representative between two successive ties via a back weft (S1, S3). A method according to claim 5, characterized in
that the pile thread change (W) takes place in the area where the pattern pile thread (OPM, UPM) binds via the inner weft (S2, S4). A method according to claim 5 and 7, characterized in
that the one before the change of pile thread (W) over the back weft (S1, S3) of his goods (O, U) binding pattern pile thread (PM) remains in this tour during the technical representation in his outer compartment (1,2) and immediately before Reverse pile thread (W) is assigned to its dead pole control program. Method according to claims 5, 7 and 8, characterized in that
that the pole-free back shot is not entered and
that the binding warp threads (OB, UB) of each product tie via three inner wefts (S2, S4) and a back weft (S1, S3) and change with respect to the back weft binding. Double carpet weaving machine with a jacquard machine for carrying out the method according to at least one of claims 1 to 9, characterized in that
that the jacquard machine which drives the pile threads (OP, UP) for forming the shed has two roller trains (61, 62) with four, independently of one another, program blocks (71 ... 74) which can be blocked in an upper position.

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