EP1375715B1 - Method and double-plush loom for making patterned pile fabric - Google Patents

Description

The invention relates to a method for producing patterned pile fabric on a double-pile weaving machine, wherein from a double pile fabric with two connected by Florhenkel Gundgeweben by separating the pile handles with a movable parallel to the base knives a top and a bottom pile fabric is produced, the pile loops and Polschenkel, wherein the pile loops forming pile threads are clamped between a basic shot and an auxiliary shot guided by lancets at a distance from the respective base fabric, wherein the auxiliary shots struck in a lane between the lancet groups associated with the two base fabrics and removed after completion of the double pile fabric.

The invention also relates to a double-pile weaving machine for the production of double pile fabrics with patterned arranged areas of pile loops and areas of pole loops, with at least two simultaneously activatable weft insertion levels associated with a weaving zone, means for separating the pile handles between the two base fabrics of the double pile fabric and at least one jacquard machine patternwise control of chorus of patterning pile threads per warp course.

A weaving method of this kind is known from DE 199 18 171 A1. On a double-ply double carpet weaving machine, two flat fabrics are produced, both of which serve as the base fabric of a pile or carpet fabric. Both basic fabrics are connected by pole handles of different colors. In both basic tissues, non-patterning pile threads, so-called dead poles, are usually extensively stretched between back and inner shots.

The jacquard machine can select these pile threads according to the pattern and move either for binding as Totpol on the base fabric or for the formation of Polhenkeln in conjunction with the respectively opposite ground fabric for shedding. The result is a so-called double pile fabric or double pile fabric. By separating the pole handles in the middle between the two basic products, two pile fabrics or carpets are created. Both pile fabrics have in the pile layer both pile areas and areas with exclusively closed pile loops.

The formed here - referred to as a false bouclé - Polschlingen usually only extend over a slightly thicker weft thread of the base fabric and therefore have only small dimensions. They are regularly much flatter than the Florschenkel in the Florbereichen. This false bouclé is also called a pattern on the ground.

If you want to enlarge the pile loops by thicker shots, adjacent pile loops are spread in the warp direction in the warp direction. They form a cord-like pile surface in the weft direction. That is unsatisfactory. It can not be produced pile fabric with acceptable tread properties and uniform pile height. The pile loops and pile legs can not be positioned anywhere on the pile surface in about a uniform plane.

EP 1 081 260 A1 proposes the use of a type of rod weaving machine for producing a pile fabric with pile loops and pile thighs. The einschützig working Rutenwebmaschine contributes in every third tour on the Polseite a thicker shot, on each warp course each a selected pile thread forms a larger loop. In the same tour, a cutting rod (Polformelement) is entered in an overlying shed over which - controlled by a jacquard - pattern according to pile threads can be performed. These larger pile loops formed thereby are separated when pulling out the cutting rod and form upstanding, anchored in the base fabric Florschenkel. These Florschenkel are significantly longer than the formed on the fabric base pole loops.

In this case, it is highly disadvantageous that the thick weft threads which spread the pile loops spread the pile legs in the row of poles, so that the pile sections in the weft direction receive a rib or cord structure.

Another disadvantage of this method is the low productivity. The Rutenwebmaschine works einschützig and requires for the integration of a number of pile loops or pile handles a total of three weaving machine tours. Because of the large amount of cutting rod to be entered within a tour, the weaving machine can only operate at low speed.

Another limiting the operating speed of the loom element is the cutting rod during their cutting function. The cutting rods heat up during the cutting process in such a way that they melt the ends of the pile legs when a certain temperature is exceeded. This affects the quality of the produced pile fabric. For this reason, a further reduction of the working speed of the loom is usually unavoidable.

Even with the method mentioned here, the height of the pile loops can not be adapted to the greater height of the pile legs, when pile loops and pile legs are positioned in the weft direction according to the pattern next to each other. The cross-section of the rod determines the height difference between Florschenkel and Polschlingen.

Tread comfort can only be ensured if the surface areas of the carpet with pile loops are very small. If the Polschlingenst structure prevail, then the pile heights are shortened by a shearing process. The low and hard pile loops then determine the pedaling comfort at a low level.

DE 43 12 235 A1 has proposed a method and a device of loop pile fabrics on a weaving machine in which auxiliary weft threads are inserted in conjunction with known lancets. (See also Hans Osswald: "The Carpet Industry", Melliand Textilberichte, 1965, page 123.) The pile threads selected for the pile weave are guided over these auxiliary shots and form larger pile loops.

The lancet groups arranged in a single plane are equipped with articulated guide plates, which can be involved in the shedding. This controllable guide boards ensures that the auxiliary shots are assigned to the pile fabric of the upper fabric or the pile fabric of the lower fabric alternately for spreading the respective pile loops. After completing the weaving process, both pile fabrics detach from each other without cutting.

The removal of the auxiliary weft threads is optional. They can remain in the tissue while supporting the pile loops. But they can also be removed laterally from the pile fabric, so that the pile loops themselves determine the pedaling comfort.

With such a double-pole weaving machine and such a method, however, only such pile fabric can be produced, on whose surface only pile loops are present. The pattern according to alternating arrangement of pile legs whose fiber ends are directed to the pole surface, and closed pole loops is not feasible with this method.

US Pat. No. 3,289,706 discloses a method and a double pile loom with which the pile is produced at an extreme height by zigzagging the pile loops before they move into the opposite base fabric by auxiliary shots on either side of a lancet, which is each assigned to a basic product become. This large Florschenkellänge is released when the lancet groups release the auxiliary shots. A pile thread pattern is not possible with this method. Likewise, according to this method, it is impossible to exchange pile loops with pile loops of about the same height according to the pattern.

We can say that in the prior art no method is known which makes it possible to arrange pile legs and pile loops of the same and structurally variable height as desired according to the pattern, without any one of the pile types having a negative influence on their quality or variability.

DE 175 757 further discloses a process for the production of double-pile fabrics in which pile warp yarns form pile loops as well as pile loops. Polschlingen and Florhenkel are always adjacent to each other and together form a pattern point. The pile handles are separated in the usual way. There are two pile fabrics. The Polschingen be spanned by means of auxiliary shots, which are guided by means of wires which extend into the area of the breast tree, at a distance from the ground fabric.

Such a procedure is not feasible for the production of patterned pile fabrics having larger areas without pile loops. The auxiliary shots do not allow trouble-free separation of pile handles in areas without loops. The wires leading into the area of the breast tree cause swelling of the tissue and impede trouble-free fabric removal. Therefore, the already very long known method has not even been able to prevail in the approach.

• bei dem die Polschlingen und die Florschenkel eine ausreichende und annähernd gleiche Höhe bei optimaler Ausrichtung zur Poloberfläche besitzen
• bei dem das Trennen der Florhenkel in allen Bereichen zuverlässig gewährleistet werden kann und
• das bei zwei- oder mehrschütziger Arbeitsweise zweitourig, ohne zusätzliche Drehzahlbegrenzung realisierbar ist.

The object of the present invention is therefore to provide a method for producing a pile fabric with any pattern arranged pole loops and pile thighs according to the double-pile weaving method,

• in which the pile loops and the pile legs have a sufficient and approximately equal height with optimal alignment to the pole surface
• in which the separation of Florhenkel can be reliably ensured in all areas and
• the two-or Mehrschütziger operation two-speed, without additional speed limitation is feasible.

This object is achieved by the method according to claim 1. The pile legs and the pile loops can be arranged on the pile surface according to any pattern, without the separation process of Florhenkel the double pile fabric is hindered in any way. It is impossible that the means for spreading the pile loops spread the Florschenkel. The size of the pile loops is variable by the choice of the dimensions of the lancet in the usual limits. For securing the almost uniform height of the pile legs and pile loops no additional operations are required except the usual compensating shear processes. There are produced by the double-pile weaving simultaneously two equal and high-quality pile fabric and thus ensures a high output of the loom.

During the separation process of the pile handles both the auxiliary shots and the crests of the pile loops are positioned with respect to their position exactly outside the range of movement of the knife, so that the loop structure and the removal of the auxiliary shots is not affected by faulty separation operations.

The method can be realized by means of modified conventional double carpet looms with a lancet arrangement without limiting the usual working speed.

A realization of the method with single weft insertion is possible in principle but for economic reasons (for a Polbindungsrapport would be at least four tours required) regularly not desired. The described method basically also allows the pattern-like combination with a pile thread pattern on the base fabric and / or with a pattern.

With the fixing and tensioning of the auxiliary shots by inguinal warp threads and the removal of the auxiliary shots from the tissues - according to claim 2 or in the manner according to claim 3 - can be ensured with optimized weaving a uniform pile loop height over the entire width of the double pile fabric regardless of the pattern.

The removal of the auxiliary weft threads according to claim 4 can be reliably automated realized by simple means.

An additional assurance of the position of the auxiliary shots in the field of double pile fabric at a distance from the trajectory of the knife allow the method steps according to claims 5 and 6. In the case of claim 5, the leading warp threads after the separation process and after removing the auxiliary shots from the remove the separated pigtails. This solution has particular advantages when patterns on the ground or weft pattern significantly determine the pattern character. The procedure according to claim 6 is recommended, if larger pile areas are provided in the pile fabric.

An additional safety distance of the auxiliary weft threads is ensured by the guide according to claim 7.

The use of the forming binder warp yarns for guiding the adjacent weft insertion elements according to claim 8 prevents the weft insertion elements from sharpening the adjacently mounted guide sections or guide boards in a sharp-edged manner.

The modification of the method according to claim 9 and 10 can be realized on conventional double-pile looms with limited modifications of some modules.

At high operating speed arise in the binding design according to claim 11 high-quality pile fabric.

The realization of the method according to claims 11, 12 and 13 ensures high stability and good stability and alignment of the pile or pile elements in a wide pole density range.

The advantage of the method according to claim 14, in addition to the high productivity, especially in additional design variants of the pile fabric. Thus, this modification also allows the production of patterns on the ground (wrong bouclé or shot pattern) in larger areas. Possibly. Provided auxiliary weft holding loops and / or alone auxiliary shots binding warp threads can be arranged on pile loops at the bottom. Pass these auxiliary shot holding slings from water-soluble fibers or very thin filaments, these can be eliminated in a subsequent, easily realizable operation at least on the visible side by water or by controlled flames (Absengen).

The double-pile looms according to claims 15 to 18 are particularly suitable for carrying out the method according to the invention.

The arrangement of the strip removal device according to claim 19 is particularly suitable when larger pole loop-free areas are provided in a pile fabric and when large pile loops are part of the pattern.

A higher reliability offers the embodiment according to claim 20, in particular for pile fabrics with a relatively low pile loop height.

Fig. 1

einen schematischen Querschnitt der Webzone entlang der Arbeitsrichtung einer Doppelflor-Webmaschine mit drei Schusseintragsebenen,

Fig. 2

einen Querschnitt durch ein Doppelflorgewebe, welches auf einer Doppelflor-Webmaschine gemäß Fig. 1 hergestellt wurde, im Bereich unmittelbar hinter der Anschlagebene,

Fig. 2a

eine Darstellung von Florhenkeln,

Fig. 2b

eine Darstellung von Florschenkeln,

Fig. 2c

eine Darstellung von Polschlingen,

Fig. 3

einen Querschnitt durch eine Webzone analog Fig. 1 für eine doppelschützige Doppeiflor-Webmaschine,

Fig. 4

ein auf der doppelschützigen Doppelflor-Webmaschine gemäß Fig. 3 hergestelltes Doppelflorgewebe entsprechend Fig. 2

Fig. 5

einen Querschnitt durch die Webzone einer vierschützigen Doppelflor-Webmaschine in einer Darstellung gemäß Fig. 1,

Fig. 6

einen Querschnitt durch ein Doppelflorgewebe, hergestellt auf einer Doppelflor-Webmaschine gemäß Fig. 5,

Fig. 7

einen Querschnitt durch ein Doppelflorgewebe analog zu Fig. 2 und

Fig. 8

eine schematische Draufsicht auf die Webzone einer Doppelflor-Webmaschine mit mehreren Schusseintragsebenen, mit einer Schneidanordnung und mit einer Vorrichtung zum Entfernen der Leisten und Hilfsschussfäden nach der Schneidanordnung,

Fig. 9

einen Gewebequerschnitt analog zu Fig. 2 mit Kettfäden zum Abbinden und Führen der oberen Hilfsschussfäden über das Messer,

Fig. 10

ein Doppelflorgewebe nach Fig. 6 mit einem Kettfaden zwischen den oberen und den unteren Hilfsschüssen für das Führen der oberen Hilfsschüsse über das Messer und

Fig. 11

eine schematische Ansicht der Fachbildeelemente in Verbindung mit dem Hilfsschussabzug zwischen der Gewebeanschlagkante und dem Bewegungsbereich des Messers.

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

Fig. 1

a schematic cross section of the weaving zone along the working direction of a double-pile loom with three weft insertion planes,

Fig. 2

2 shows a cross-section through a double-pile fabric, which was produced on a double-pile weaving machine according to FIG. 1, in the area immediately behind the stop plane, FIG.

Fig. 2a

an illustration of pile loops,

Fig. 2b

a representation of pigtails,

Fig. 2c

a representation of Polschlingen,

Fig. 3

2 shows a cross-section through a weaving zone analogous to FIG. 1 for a double-acting Doppeiflor weaving machine,

Fig. 4

a double-pile fabric produced on the double-skinned double-pile weaving machine according to FIG. 3 corresponding to FIG. 2

Fig. 5

3 shows a cross section through the weaving zone of a four-armed double-pile loom in a representation according to FIG. 1,

Fig. 6

a cross-section through a double pile fabric, made on a double-pile loom of FIG. 5,

Fig. 7

a cross section through a double pile fabric analogous to FIG. 2 and

Fig. 8

a schematic plan view of the weaving zone of a double-pile loom with multiple weft insertion planes, with a cutting assembly and with a device for removing the strips and auxiliary weft threads after the cutting assembly,

Fig. 9

a fabric cross-section analogous to FIG. 2 with warp threads for setting and guiding the upper auxiliary weft threads over the knife,

Fig. 10

a double pile fabric of Figure 6 with a warp thread between the upper and lower auxiliary shots for guiding the upper auxiliary shots on the knife and

Fig. 11

a schematic view of the shedding elements in conjunction with the auxiliary shot withdrawal between the tissue stop edge and the range of movement of the knife.

The basic principle of the present invention will first be explained using the example of a three-sheave double-pile weaving machine according to FIG. 1. The dreischützige double-pile weaving machine is equipped with shedding devices that can distribute the threads individually or in groups in a conventional manner in four superimposed storage levels.

The upper compartment level O and the upper middle compartment level Ma are associated with the upper base fabric 22a with respect to the binder warp yarns 223a and the filler chain 224a. The lower compartment level or the lower compartment U and the lower center compartment level Mb are associated with the lower base fabric 22b with regard to the binder warp threads 223b and the filler chain 224b.

The patterning pile threads change between the upper shed O and the lower shed U when they form pile loops 226. If the pattern poles are to form pile loops 225a, 225b, they regularly alternate between an outer compartment O or U and the respectively remote middle compartment plane Mb or Ma.

In the weft insertion plane 15, the back shots 221a and the inner shots 222a of the upper base fabric 22a are inserted. The weft threads - namely the back shots 221b and inner shots 222b of the lower base fabric 22b - are entered through the weft insertion plane 17.

Gleichbindend as the filling chain 224a, 224b can each base fabric 22a, 22b several non-patterning pile threads - so-called. Totpole - are included as Totpolstrang TPa and TPb with. The pile threads of these Totpolstränge TPa and TPb can be replaced in a conventional manner against each of the mustering pile threads.

The middle weft insertion plane 16 is flanked above and below by the lancet groups 14a, 14b. The lancet groups 14a, 14b are part of the frame-mounted lancet unit 14. The guide portions 145 engage around the path of the weft insertion means 16, which are generally designed as gripper bars.

The lancet groups 14 a, 14 b keep a lane 140 free, which extends into the finished double pile fabric 2. Thin auxiliary weft threads 231a and 231b, which are supported on the inner edges of the lancets 14a, 14b and form the pile loops 225a, 225b in the region of the tissue abutment plane or edge A, are inserted in the middle weft insertion plane 16.

To ensure sufficient tension of the auxiliary weft yarns, these are on both sides of the double pile fabric 2 in the plane of the lane 140 together with the Leistenkettfäden 232, 232 '; 232a, 232a '; 232b, 232b 'in strips 23, 23'; 23a, 23a '; 23b, 23b 'integrated.

These strips 23, 23 'maintain the tension of the auxiliary shots 231 beyond the area of the tissue stop edge A. (From this point onwards, only the basic reference characters are used in the description of general functions.)

At an appropriate distance behind the tissue stop edge A, these auxiliary shots 231a, 231b slide down over the free ends of the lancets 14a, 14b. The result is a sufficiently large, loose pole loop 225a, 225b, from which the auxiliary weft yarns 231a, 231b can be easily pulled out at a later time.

This extraction of the auxiliary shots 231a, 231b from the pile loops 225a, 225b can begin immediately at the end of the lancets 14a, 14b and should, when all auxiliary shots 231a, 231b are set in a common strip 23, 23 ', until the knife 41 is reached the knife carriage 4 be completed (see Fig. 11).

In general, however, the measured in the weaving direction distance between the fabric edge A and the middle between the base fabrics effective knife 41 of the blade carriage 4 is so small that the withdrawal can not be regularly and reliably until reaching the path of the knife 41 is completed. For this reason, it is necessary to move the removal of these auxiliary shots 231 a, 231 b to a working portion behind the movement path of the knife 41.

However, in order that the auxiliary weft threads 231a of the upper base fabric 22a do not enter the range of motion of the knife 41 due to their force of gravity, it is necessary to insert the auxiliary sections of the upper pile fabric 2a and the lower pile fabric 2b into different strips 23a, 23a 'of ledge warp threads 232a and 23b, respectively To incorporate ledges 23b, 23b 'from ledge threads 232b.

These strips 23a, 23a '; 23b, 23b 'keep their respective auxiliary weft yarns 231a, 231b stretched over the entire fabric width. In the presence of a sufficiently large and distributed number of patterned pile loops across the fabric width, they ensure that the auxiliary shot does not enter the range of motion of the knife 41. Otherwise, accidents could not be ruled out.

If there are not enough patterned pile loops in pattern areas made of pile legs, in pattern areas with patterns on the ground or with weft patterns available, so-called auxiliary pile holding loops 225c are to be fixed at a suitable distance below the upper base fabric 22a. These auxiliary weft retaining loops 225c are tied as well as patterning pole pieces 225a, 225b. However, they consist of a very thin and / or neutral in terms of color and structure thread.

If, for reasons of a regular structure of the pile fabrics 2a, 2b, it is necessary to dispense with auxiliary weft retaining loops 225c, warp threads 229 or 228 can be provided, in particular for guiding the auxiliary weft threads 231a, which bind exclusively with or between auxiliary weft threads (FIG. 9 or FIG. 10).

In the case of FIG. 9, the warp threads 229 are bound exclusively with upper auxiliary weft threads. The warp threads 229 of a group can be distributed over several warp courses. In this way one can save material and facilitate the extraction of the auxiliary weft yarns 231. On the other hand, with sufficiently tensioned auxiliary weft yarns 231, it suffices if support on a section of one or more centimeters takes place only once.

A second variant of the use of leading warp threads 228 is shown in FIG. 10. Here, the warp threads 228 are fed individually exclusively between upper and lower auxiliary shots 231a and 231b. In front of the area of the knife 41, these warp threads 228 are lifted upwards by means of guide means 33a Area of the knife 41 out. The auxiliary shots 231a (also 231b) slide over wire-shaped grid webs 331 also from the area of the knife 41 without hindering the cutting process. The last warp threads 232 are used for shed formation with the aid of special bar shafts LSa, LSb; LSa 'LSb' (see Fig. 11) with a Fachvertritt 2321, 2321 ', 2321 "(Fig 1, 3, 5) out.

In this context, it should also be mentioned that the auxiliary weft threads 231a, 231b, which are subsequently pulled out of the pile loops 225a, 225b, 225c of the base fabric 22a, 22b, are preferably made of thin synthetic material.

FIG. 2 shows an example of a fabric made on a three-shed double-pile weaving machine according to FIG. 1. In each tour, one basic shot 221a, 222a or 221b, 222b of the upper fabric and the lower fabric and one auxiliary shot 231a, 231b are entered.

The basic shots 221a, 222a or 221b, 222b are involved in a tour in a base fabric 22a, 22b once as back weft 221a or 221b and in the other base fabric 22b, 22a as an inner weft 222b, 222a. The auxiliary weft 231b, 231a of a base fabric is always inserted simultaneously with an inner weft 222b, 222a of the same basic fabric 22b, 22a.

The auxiliary shot hold slings 225c need not be entered in each warp course and each tour. Depending on the pitch in the weft direction, such auxiliary weft retaining loops 225c may be provided only every third or even every tenth warp course. It is possible, in successive weft insertion cycles per basic product, to form these auxiliary weft holding loops 225c in different warp courses, so that an optionally streaky effect can be avoided and all auxiliary weft yarns 231a are kept away from the knife 41.

The separation of the two basic products 22a, 22b by the knife 41 of the knife carriage 4 takes place in the region between the vertices of the relaxed pile loops 225a, 225b of the upper and the lower base fabric 22a, 22b. The knife 41 separates the tavern! the pile handle 226 of FIG. 2a and forms Florschenkel 2261 of FIG. 2b, the z. B. are positioned according to the pattern between the vertices of the pile loops 225b in Fig. 2c. To ensure a sufficient distance of the auxiliary shots 231a from the knife 41, the strips are raised by means of guide 33. The lower auxiliary shots 231b lower due to their gravity down. This process can also be supported by guide means 33 and 33b.

The leadership of the binding chain 223 in the shedding can be done in the usual and proven form. It is important that over a certain section in the weft direction all basic shots 221 ... and 222 ... are sufficiently held on the respective base fabric 22a, 22b and the pile handles 226 and the pile loops 225a, 225b are aligned with weft threads in such a way that they Essentially perpendicular from the respective base fabric 22a, 22b protrude. The type of basic bond is basically freely selectable without restrictions.

The guidance of the binding chains 223 during the shedding, especially if no filling chain 224a, 224b is available for the guidance of the weft insertion means 16, should be positioned such that they are e.g. B. the gripper bars at a distance of approximately existing leading edges on the lancet unit 14 can lead.

In Fig. 3, a weaving unit with two weft insertion levels 11, 12 is shown. The registered by the gripper bars in the weft insertion level 11 and the weft insertion plane 12 shots are performed using the sley 13 against the Gewebeansch lagkante A.

The warp threads are positioned in the usual way in the upper compartment level O ', in the lower compartment level U' and in a middle level M level.

The two weft insertion planes 11, 12 are alternately available once for the entry of a basic weft 221a ', 222a' or 222b ', 221b' into a first base fabric and for the insertion of an auxiliary weft 231b, 231a for the opposite base fabric. That is, a basic shot 222b ', 221b' z. B. registered in the lower base fabric 22b ', then receives the upper base fabric 22a' their auxiliary shot 231a 'and can form Polschlingen 225a'. If, on the other hand, the upper base fabric 22a 'receives a base weft 221a', 222a ', then the auxiliary weft 231b is assigned to the lower base fabric 22b'. The upper and lower weft insertion level 11, 12 are therefore each assigned to a weft changing device (not shown).

It is also necessary that the lancet groups 14a ', 14b' each guide plates 141, 142 are assigned, either the weft of the upper weft insertion level 11 or registered by the lower weft insertion plane 12 auxiliary weft thread 231a, 231b by Fachvertritt 1411 or Fachvertritt 1421 in the alley 140 between the lancet groups 14a 'and 14b' lead.

The last warp threads 232a, 232b execute a Fachvertritt 2321 'or 2321 "such that they each together with the auxiliary shots 231a associated with the upper backing fabric 22a or together with the auxiliary shots 231b, which are associated with the lower backing fabric 22b, one each Form bar 23a or 23b.

The double-pile fabric 2 'produced by this procedure is shown in FIG. 4. To ensure a corresponding fabric density with appealing productivity, the patterned pile handles 226 'or pile loops 225a', 225b 'in each basic product alternately assigned a back weft 221a', 221b 'and then an inner weft 222a', 222b '. Also in this arrangement, the pile handles 226 'are separated between the two planes of the auxiliary shots 231a and 231b. So that the auxiliary shots 231a in the region of the upper base fabric 22a are not destroyed before removal from the pile loops 225a, it is also necessary here to form so-called auxiliary sheaf holding loops 225c from thinner threads.

A double-pile weaving machine with four superimposed weft insertion levels 15, 16, 161, 17 for carrying out the method according to the invention is shown in FIG. 5. In such a double-pile weaving machine, the warp threads are moved to five shed levels O ", U" by the known shed forming elements. Ma ", Mb" and Z distributed.

The entry of the auxiliary weft threads 231a and 231b ensure the middle weft insertion levels 16, 161. To guide the respective auxiliary weft threads 231a, 231b in the alley 140 between the two lancet groups 14a "and 14b" ensure the two guide plates 143, 144, with separate Fachbildeelemten, z , B. traction means 1410 and 1420 (see Fig. 3), can be spent forming the required positions.

The existing weft insertion planes 15, 16, 161, 17 ensure that in each tour there is available a dorsal weft 221a "and 221a '" for tying pile loops 226 "and / or pile loops 225a", 225b. "It is possible to have high symmetric bonds Pold density in the pile area and also in the Polschlingenbereich to make.

Another way of patterning is in this production variant in the formation of patterns on the ground. Here, the colored pile loops 227a ", 227b" are guided inwards over the respective inner shots 222a ", 222b", so that on In a deeper area of the pattern a firm patterned goods structure can be ensured.

In the areas of this pattern at the bottom, it is of course necessary, just as in the areas where pile handles are formed, to guide reliably the upper base 22a "associated auxiliary shots 231a above the knife 41 and thus to prevent these auxiliary shots 231a from being destroyed; before being pulled out sideways.

In the four-armed variant of the weaving machine, it is also possible between the auxiliary shots 231b of the lower fabric 22b "and the auxiliary shots 231a of the upper fabric 22a" an additional, elongated warp thread 228 - see. Fig. 10 - bring, which is pulled away in the range of movement of the knife 41 together with the upper pile fabric 2a or better with additional means 33, 33a, 331 separately upwards. This additional warp thread 228 is fed alternately into the middle level planes Ma "and Mb" and thereby performs a Fachvertritt 2281.

In all variants of Figures 2, 4, 6 and 10, the auxiliary shots 231a, 231b on either side laterally outside the double pile fabric 2, 2 ', 2 "by means of ledge warps 232a, 232b (see Fig. 8) in two mutually independent strips 23a These strip warp threads 232 ensure within the double-pile fabric 2, 2 ', 2 "the necessary tension of the auxiliary weft threads 231a, 231b.

After the upper 22a has been separated from the lower base fabric 22b, a strip 23a 'or 23b' is first severed at both pile fabrics 2a and 2b which continue after the separation process (see FIG. The respective other strip 23a, 23b is laterally pulled out of the respective pile fabric together with the auxiliary weft threads 231a, 231b.

The manner of this process will be described below with reference to FIG. 8 for the lower pile fabric 2b. The produced double pile fabric 2, 2 ', 2 "- hereinafter referred to as double pile fabric 2 - is first led horizontally to the needled filling rollers 31 and 32. For the leadership of the associated strips 23b, 23b' is on the lower take-off roll 32 on both sides ever A collar 320, 320 'is provided, and pressure rollers 321, 321' can frictionally guide the strips 23b, 23b 'on the collar 320. One of these pressure rollers 321' can be connected to a separating knife 5 which separates the auxiliary weft threads 231 from the strip 23b ' ,

The knife carriage 4 is - as usual in double-pile looms - in a specific arrangement to the two take-off rollers 31, 32 and moves at high speed in changing directions parallel to these draw-off rollers 31, 32. This conventional unit requires no special description.

The removal of the strips 23b, 23b 'and the auxiliary shots 321 by means of strip trigger 6 - right - and by means of last-auxiliary shot trigger 7 - left. The strips 23b 'clamped by the pressure rollers 321, 321' on the respective collar 320, 320 'are separated on one side (here on the right) of the base fabric 22 by the auxiliary shots 231 by means of knives 5 and the strip 23b' via the corresponding strip trigger 6 a Waste container supplied.

The strip 23b (left), on which the auxiliary weft threads 231b remain, is pulled laterally away from the pile fabric 2b by means of strip removal rollers 71. The auxiliary weft yarns 231b follow them to the same extent. To reduce the width of the weaving machine, however, it is expedient, after a certain take-off length, to pull the auxiliary weft yarns 231b laterally out of the pile fabric 2b with the aid of special auxiliary weft take-off rolls 72 and to feed them to a waste container.

Another variant of the tension of the auxiliary weft threads 231a and 231b is shown in FIG. Here, the auxiliary weft threads 231a and 231b tie together with strip warp threads 232 a strip. This procedure can be realized if the auxiliary weft threads 231a, 231b are already removed from the double pile fabric 2 before reaching the movement path of the knife 41.

This process is u. a. shown schematically in FIG. This figure shows a plan view of the weaving arrangement. In the central area, all the warp threads necessary for the production of the double pile fabric, namely the binding warp threads 224, the Füllkettfäden 224, the dead poles TPa of the upper backing fabric 22a, the Totpole TPb of the lower backing fabric 22b and also the warp threads 228 are supplied. These warp threads are subjected in a conventional manner in groups by means of shafts SM or individually by means of strands of a jacquard JM a controlled shedding, which leads to the production of the double pile fabric 2. In this central region, the lancet groups 14a, 14b are arranged.

In the area of the auxiliary warp threads 232, 232a, 232, or 232 ', 232a', 232b ', separate shed forming means are arranged, which can move these auxiliary warp threads in the required manner. This can be special "Leistenautomaten", special Leistenschäfte LS, LS 'or LSa, LSb or LSa' LSB 'or individually by the jacquard JM moving strands.

After completion of the double pile fabric (2) at the fabric edge A, the right strip 23 'is separated by means of knife 5 and conveyed by means of strip trigger 6' in the waste container. At the same time, the left-hand strip 23 is laterally pulled away by means of a last-aid snapshot 7 '. The operation corresponds to the description of FIG. 7. The removal of the auxiliary shots 231 is completed before the double pile fabric 2 reaches the path of the knife 41.

LIST OF REFERENCE NUMBERS

1

Webzone

11

Weft insertion means

12

Weft insertion means

13

batten

14

Lancet unit

14a, 14b

Lancets / lancet groups (three-pronged)

14a ', 14b'

Lancets / lancet groups (two-armed)

14a ", 14b"

Lancets / lancet groups (four-armed)

140

alley

141, 142

routing boards

1410, 1420

traction means

1411, 1421

Fachvertritt

14a ", 14b"

Lancets, lancet groups

143, 144

routing boards

1431, 1441

Fachvertritt

145

guide sections

15

Weft insertion means

16

Weft insertion means

161

Weft insertion means

17

Weft insertion means

2, 2 ', 2 "

double-pile

2a, 2a ', 2a "

Pile fabric (upper fabric)

2b, 2b ', 2b "

Pile fabric (lower fabric)

22a, 22a ', 22a "

base fabric

22b, 22b ', 22b "

base fabric

221a, 221a ', 221a "

Back shots, basic shot

221b, 221b ', 221b "

Back shots, basic shot

222a, 222a ', 222a "

Inside shots, ground shot

222b, 222b ', 222b "

Inside shots, ground shot

223a, 223a ', 223a "

Binding warp threads (upper fabric)

223b, 223b ', 223b "

Binding warp threads (lower fabric)

224a, 224a ', 224a "

Filling chain (upper product)

224b, 224b ', 224b "

Filling chain (lower fabric)

225a, 225a ', 225a "

Pile loops (upper fabric)

225b, 225b ', 225b "

Polschlingen (Unterware)

225c

Auxiliary income-retaining loop

226, 226 ', 226 "

Florhenkel

2261, 2261a, 2261b

Florschenkel

227a ", 227b"

Sample pole at the bottom

228

warp

229

warp

23, 23 '

Groin, groin tissue

23a, 23a '

Groin, groin tissue

23b, 23b '

Groin, groin tissue

231a, 231b

auxiliary income

232, 232a, 232b (')

Leistenkettfäden

2321, 2321 '

Fachvertritt

3

tissue deduction

31

off roll

32

off roll

320, 320 '

Federation

321, 321 '

pressure roller

33, 33a, 33b, 331

guide means

4

blade slide

41

knife

5

knife

6, 6 '

afford deduction

7, 7 '

Make auxiliary income deduction

71

Strips off rolls

72

Auxiliary shot-off rolls

TPa, TPa ', TPa "

Totpole, Totpolstrang

TPb, TPb ', TPb "

Totpole, Totpolstrang

M, Ma, Mb, Ma ", Mb"

Middle subject (level)

Z

Central compartment (level)

O, O ', O "

Upper part (level)

U, U ', U "

Sub-level

A

stop edge

JM

Jacquard

SM

dobby

LSa, LSb; LSa ', LSb'

Leistenschäfte

Claims (20)

1. A method for manufacturing patterned pile fabrics on a double-pile loom
   wherein upper and lower pile fabrics (2a, 2b) comprising pile loops (225a, 225b) and limbs (2261) are produced from a double-pile loom with two backing fabrics connected by nap loops by cutting the nap loops (226) using a knife (41) that can be moved in parallel to the base cloths (22a, 22b),
   wherein the pile threads that form the pile loops (225a, 225b) are tentered between a ground weft (221; 222) and an auxiliary weft (231a, 231b) guided by lancets (14a, 14b) at a distance from the respective backing fabric (22a, 22b),
   wherein the auxiliary wefts (231a, 231b) are looped by hand in a pathway (140) between the two groups of lancets (14a, 14b) associated with the two backing fabrics (22a, 22b) and removed when the double-pile fabric is completed,
   characterized
   in that the auxiliary wefts (231a, 231b) are integrated in selvages (23, 23'; 23a, 23a'; 23b, 23b') on both sides of the double-pile fabric (2) in the plane of the pathway (140) and guided in a tentered fashion therein, and
   in that the auxiliary wefts (231a, 231b) and their selvages (23, 23'; 23a, 23a'; 23b, 23b') are guided by separate guide elements (33, 33a/b, 331, 7') outside the range of motion of the knife (41) after sliding off the lancets (14a, 14b).
2. The method according to Claim 1, characterized
   in that the auxiliary wefts (231a, 231b) are exclusively interwoven with selvage warp yarns (232a, 231b) to form selvages (23, 23') on the sides of the double-pile fabric (2) and
   in that the auxiliary wefts (231a, 231b) are removed from the double-pile fabric (2) before reaching the range of motion of the knife (41).
3. The method according to Claim 1, characterized
   in that the auxiliary wefts (231a, 231b) of the upper pile fabric (2a) and lower pile fabric (2b) are separately interwoven with selvage warp yarns (232a, 232a'; 232b, 232b') to form selvages (23a, 23a'; 23b, 23b') on both sides of the double-pile fabric (2), and
   in that the auxiliary wefts (231a, 231b) of both pile fabrics (2a, 2b) are removed after passing the range of motion of the knife (41).
4. The method according to any one of Claims 1 through 3, characterized
   in that the auxiliary wefts (231a, 231b) are cut between one of the selvages (23', 23a', 23b') and the double-pile fabric (2) or one of the pile fabrics (2a, 2b) and pulled out laterally from the pile loops (225a, 225b, 225c) together with the respective other selvage (23, 23a, 23b) for the purpose of removing them from the double-pile fabric (2) or one of the pile fabrics (2a, 2b).
5. The method according to Claim 1, characterized
   in that during the production of the upper backing fabric (22a), at least in areas of the double-pile fabric (2) where there are no figuring pile loops (225a),

   - either individual warp yarns (229) tie up alternately with the auxiliary wefts only, at least from strand to strand or at a greater spacing, or

   - a stretched warp yarn (228) is guided between the auxiliary wefts (231a) of the upper pile fabric (2a) and the auxiliary wefts (231b) of the lower pile fabric (2b), and

   in that that the warp yarns (229, 228) are guided together with the auxiliary wefts (231a) over the range of motion of the knife (41).
6. The method according to Claim 1, characterized
   in that during the production of the upper backing fabric (22a), holding loops (225c) for auxiliary wefts are formed like figuring pile loops from threads of neutral color and/or thin threads, at least in areas where there are no figuring pile loops (225a, 225b).
7. The method according to Claims 1, 3 and 5, characterized
   in that at least the selvages (23a, 23b) of the upper pile fabric (2a) and/or the warp yarns (228, 229) are guided at a distance from the track of travel of the knife (41) while their tension is maintained by guide elements (33, 33a, 331).
8. The method according to Claim 1, characterized
   in that the binding warp yarns (223a, 223b) of both backing fabrics (22a, 22b) are assigned for shed forming in a middle shed (M; Ma; Mb; Ma"; Mb"; Z) and positioned so that they are tangent to the lane of a weft insertion means of weft insertion planes (11, 12; 15, 16, 161, 17).
9. The method according to Claim 1, characterized
   in that the double-pile loom is equipped with a three-position Jacquard loom and has two weft insertion means that can be activated at the same time and are arranged one on top of the other in two weft insertion planes (15, 16, 17), and
   in that

   - a back or inner weft (221a'; 222a'; 221b', 221a') for one of the backing fabrics (22a', 22b') and

   - an auxiliary weft (231b; 231a) of the respective other backing fabric (22b'; 22a')

   are inserted in the two weft insertion planes (11, 12) of each course.
10. The method according to Claim 1, characterized
    in that the double-pile loom is equipped with a three-position Jacquard loom and has in two weft insertion planes (11, 12) arranged one on top of the other that can be activated at the same time, and
    in that

    - a back or inner weft (221a'; 222a'; 221b', 221a') for one of the backing fabrics (22a', 22b') and

    - an auxiliary weft (231b; 231a) of the respective other backing fabric (22b'; 22a')

    are inserted in the two weft insertion planes (11, 12) of each course, and
    in that the inserted auxiliary wefts (231a, 231b) are guided into a pathway (140) between the groups of lancets (14a', 14b') using guiding lifters (141, 142) that are flexibly linked to the lancets (14a', 14b').
11. The method according to Claims 9 or 10, characterized
    in that the nap loops (226') and pile loops (225a', 225b') per backing fabric (22a'; 22b') are first bound to a back weft (221a, 221b) and then to an inner weft (222a'; 222b'), a sequence that alternates from course to course.
12. The method according to Claim 1, characterized
    in that the double-pile loom is equipped with a four-position Jacquard loom and has three weft insertion planes (15, 16, 17) arranged one on top of the other that can be activated at the same time,
    in that

    - a back or inner weft (221a; 222a; 221b, 221a) for each of the backing fabrics (22a, 22b) is inserted in each of the outer weft insertion planes (15, 17), and

    - an auxiliary weft (231a, 231b) is always inserted in the central weft insertion plane (16) in each course,

    in that the auxiliary wefts (231a, 231b) are guided into a pathway (140) between the groups of lancets (14a, 14b) using guide sections (145) that are attached to the lancets (14a, 14b) and encompass the periphery of the central weft insertion plane (16).
13. The method according to Claim 12, characterized
    in that the nap loops (226) and pile loops (225a; 225b) in each backing fabric (22a, 22b) bind via a back weft (221a, 221b) in each course.
14. The method according to Claim 1, characterized
    in that the double-pile loom is equipped with a five-position Jacquard loom and has four weft insertion planes (15, 16, 17) arranged one on top of the other that can be activated at the same time,
    in that a back weft (221a, 221b) is inserted in the two outer weft insertion planes (15, 17) and in each of the backing fabrics (22a", 22b") in each course,
    in that an inner weft (222a, 222b) is inserted alternately in the two central weft insertion planes (16, 161) for one of the backing fabrics (22a", 22b") and an auxiliary weft (231a, 231b) is inserted for that same backing fabric, and
    in that the inserted auxiliary wefts (231a, 231b) of the two central weft insertion planes are guided into the pathway (140) between the groups of lancets (14a", 14b") using guiding lifters (143, 144) that are flexibly linked to the lancets (14a", 14b").
15. A double-pile loom
    for manufacturing double-pile fabrics (2) with nap loop (226) sections arranged according to the pattern and sections of pile loops,
    with at least two weft insertion planes (11, 12; 15, 16, 17) that can be activated at the same time and assigned to a weaving zone (1),
    with a knife or knives (41) for cutting the nap loops (226) between the two backing fabrics (22a, 22b) of the double-pile fabric (2) and
    with at least one jacquard machine (JM) for shed forming control of strands of figuring pile threads per warp course according to the pattern,
    characterized
    in that groups of lancets (14a, 14b) are placed in the weaving zone (1), and their outside guiding surfaces slide along the looped weft yarns (222a; 222b) of the adjacent backing fabrics (22a, 22b) and delimit a pathway (140) between each other that is open in working direction,
    in that guide elements (guiding lifters 141, 142; 143, 144; guiding sections 145) into the pathways (140) are associated with the groups of lancets (14a, 14b) for guiding auxiliary wefts to be looped with the batten (13),
    in that shed forming elements (such as selvage shafts LSa, LSa'; LSb, LSb') for selvage warp yarns (232, 232a, 232b) that can alternately be positioned above or below auxiliary wefts (231; 231a, 231b) are placed to both sides of the shed forming zone for the double-pile fabric (2), and
    in that means (selvage pulloff 6, selvage auxiliary weft pulloff 7) are provided for removing the selvages and the auxiliary wefts (231; 231a, 231b) connected with the selvage warp yarns (232; 232a, 232b) from the double-pile fabric (2) or from separate pile fabrics (2a, 2b).
16. The double-pile loom according to Claim 15, characterized
    in that it has two weft insertion planes (11, 12) and
    in that the groups of lancets (14a', 14b') have guiding lifters (141, 142) linked to them that can be moved in a shed-forming manner at least across one weft insertion plane (11;12).
17. The double-pile loom according to Claim 15, characterized
    in that it has three weft insertion planes (15, 16, 17) and
    in that the groups of lancets (14a, 14b) have guiding sections (145) with which they can be positioned like a frame on both sides of the weft insertion plane (16) in the area of the shed.
18. The double-pile loom according to Claim 15, characterized
    in that it has four weft insertion planes (15, 16, 161, 17) and
    in that the groups of lancets (14a', 14b') have guiding lifters (143, 144) linked, to them that can be moved in a shed-forming manner at least across one weft insertion plane (16;161) each.
19. The double-pile loom according to Claim 15, characterized
    in that a shed forming device (such as a pair of selvage shafts LS) is placed on both sides of the shed-forming zone for the double-pile fabric (2) for selvage warp yarns (232) of both pile fabrics (2a, 2b), and
    in that the means (selvage pulloff 6, auxiliary selvage weft pulloff 7) for removing the selvages (23, 23') and the auxiliary wefts (231; 231a, 231b) from the double-pile fabric (2) are arranged between the fabric stop (A) and the trajectory of the knife (41).
20. The double-pile loom according to Claim 15, characterized
    in that shed forming devices (such as two pairs of selvage shafts LSa, LSa', LSb, LSb') for selvage warp yarns (232a) of the pile fabric (2a) and for selvage warp yarns (232b) of the pile fabric (2b) are placed laterally on both sides of the double-pile fabric (2)
    and
    in that the means (selvage pulloff 6, auxiliary selvage weft pulloff 7) for removing the selvages (23, 23') and the auxiliary wefts (231; 231a, 231b) from the pile fabric (2a) as well as from the pile fabric (2b) are arranged in working direction after the track of motion of the knife (41).

Images