DE4012235A1 - Double pile woven carpeting - has varied dead pile arrangement to give fine patterning - Google Patents

Abstract

In fg. double pile woven materials, partic. carpetings, the arrangement of dead piles joining the upper and lower fabric levels can be opt. altered during prodn., so even and uneven pile leg numbers in the warp line form patterning. ADVANTAGE - Method allows fine patterning to be executed.

Description

The invention relates to a method for producing double pile fabrics, especially double carpets, with mech choir arranged pile threads and in the top and bottom pile fabric ver divides integrated dead pole threads while avoiding mixed contours on a double pile weaving machine with electronically controlled Three-position jacquard machine with one-turn pattern selection.

All previously known processes for the production of Mehrchori against double pile fabrics with integrated dead poles is common, that each pile thread forms an even number of pile legs, since the pile threads are invariable to the top and bottom pile fabrics assigned. The upper pole is always the top pile fabric and the lower pole is always assigned to the lower pile fabric. This too Order is when using special jacquard machines with two Departments and mechanically controlled sample selection necessary, because the pattern selection of the upper and lower pole is often not in one Level and a single-turn pattern selection for the sake of a high working speed is avoided if possible. Fixed assignment is also used for jacquard card production the pile threads are necessary, otherwise the card manufacturer complicated design and a special card patron ne would have to be created.

Because of this technical and economic constraint to a permanent contract order of the dead poles the problems of Mixed contour formation in two-speed weaving in the double compartment principle manufactured double pile fabric with in top and bottom pile fabric  firmly integrated dead poles, causing losses in aesthetics effect of the double pile fabrics occurred. A mixed contour is present when two different at one pole changing point colored pole pieces are not clearly separated, so they mix and create unclear contours. Only through that Solutions of the patents DE-PS 15 35 796 and DE-PS 15 35 805 succeeded it to prevent the mixed contours, but by the single-speed Pattern selection doubles the card length compared to the their two-speed bindings. In addition, the one-turn me Chinese-looking pattern selection for speed reductions, because between the weft entries additional movements of some stroke elements in the selection position and an additional rest in this position are necessary.

The disadvantage of the bindings, which is an exact assignment of the pole need threads to the top and bottom carpets is that the smallest sample point on two pole legs of a pole knob remains limited and the resolution to one pole leg per Sample point is not possible. This limitation limits the possibilities of the design engineers for finer patterns now and then the use of coarser poles with the same pattern resolution threads and the reduction in the number of poles per unit length.

Another disadvantage of the fixed pile thread assignment is there rin that when changing the design, the swap of the choir color positions is based, a complex repositioning of the pole coils on Edge frame is necessary, which makes the web more effective machine sinks or for each other color setting separately beaten jacquard card is required.  

These disadvantages mentioned affect all types of bindings, too those whose carpets place high demands on durability behave and do justice to the aesthetic effect.

This affects the classic three and two-shot binding, three woven through at speed, according to DR-PS 5 74 920, so at three tours, one Polnoppe each in the upper and lower carpets det, the dead pole ver evenly in both carpets is integrated and no mixed contours arise. The also affects the above-mentioned bindings for two-speed interwoven double carpets with integrated dead pole and without mixed contours.

The bindings for the single-speed, symmetrically woven weft Double carpets are for example in EP-PS 01 19 184 and DD-PS 2 56 239 described. The double carpets of these ties have scattered dead poles and opposite the asymmetrical ones tric woven carpets have high pimples, because in every Warp course must have one upper pole and one lower pole thread at the same time star. This single-speed binding technique for symmetrical ge woven double rugs is the most productive manufacturing process for woven carpets. The downtimes for design and color Changing the choir on the canter frame is therefore particularly effective detrimental to the benefit. The large number of knobs per Area unit favors the design of fine-contour patterns, the disadvantage is that the smallest pattern point on four Pole leg is limited.

The invention has for its object in the manufacture of multi-choir double pile fabrics, especially double tapes to integrate the dead pole formed by the pile threads in such a way  that the disadvantageously acting limitation of the smallest pattern point on two pole legs of a Polnoppe and the choir Repositioning the pole coils on the edge frame when swapping the Color combinations and mixed contours for two-speed woven Ties are avoided.

This object is achieved in that the Zu order of the dead pole threads to be integrated to the upper and lower pile any fabric during the formation of the double pile fabric is changed so that even and odd pole leg numbers in Kettkurs be formed according to the pattern.

The introduction of odd pole leg numbers results in a different one Reading the pattern cartridge. A pattern point does not mean more of a pole nub, which has two pole legs, but half a pimple with a pole leg. This can be a Pattern motif can be very finely contoured.

Another feature of the invention is that the by changing the assignment of the dead pole threads to the upper and Dead pile crossings in the under pile fabric Back pocket between the choir staff and the boards braid through the introduction of a sample starting position in eliminates every phase of double pile formation and again can be adjusted.

To make it easier to pull in the pile thread when preparing Thread breakage, for observation and weaving of double pile basic fabric, a sample starting position is introduced, in which is the dead pole assignment after the height grading of Chore aligned in the canter frame and at the - based on two Warp courses - half of the pile threads in the lower fabric and the on  half of which is integrated in the upper fabric as a dead pole. These Sample starting position can be determined in that the Pole threads of the canter frame are known to be an exact assignment to the circuit board strands of an electronically controlled Jac own quard machine. As usual, the pole coils are the first choirs attached to the canter frame below and the lower The other choirs are based on pile fabric arranged. The thread run is also done by the canter as usual frame to a perforated field, in which the pile threads ge choir are staggered and merged. Passie in front of the heald frames If the pile threads are separated by choir, before they are passed through the eyelets of the board strands. The described order of the pile threads thus allows the fixed laying a defined starting position, at least two Shot entries for entering an upper and lower shot includes and is suitable for weaving the double pile base fabric. The sample starting position is supplemented by the choir positions, in which each choir can form patterns separately and those for one weave or pull in the knots after changing the design and to the con trolls of the choir entry are needed. The sample home and Choir positions can be separated and separated as needed Synchronization device between weaving and jacquard machine place a double pile woven pattern creation, in order to continue the original work after the work Adjust sample position again.

The principle of changing dead pole assignment is invented appropriately also used when swapping the color lungs in the carpet pattern the choir-like repositioning of the pole coils  on the canter frame and thus standstill significantly reduce times.

The changing dead pole distribution in each warp according to the invention course balances itself approximately over the carpet width, so that approximately the same dead for top and bottom pile fabrics pol component results. In borderline cases there are sample points in the warp course, where all dead poles are bound in a carpet and in opposite carpet there is no dead pole.

Depending on the type of binding, the number of choirs and the Carpet quality there is a requirement that at least one Dead pole should be present at every pattern point, or that the Half dead poles each - based on two warp courses - on upper and under pile fabrics are distributed. According to the invention achieved by having a correction calculation is carried out on a per-course basis. For this There is an initial state of the pile thread distribution on the top and bottom pile fabric, which is characterized by the pattern gear position is characterized.

The correction calculation comprises the following steps:

• 1. Any thread x (1) should form a pattern point.
• 2. Check whether the thread is a dead pole in the upper or under pile fabric or already in sample position.
• 3. If the thread is already in the pattern position, there is none Correction necessary.
• 4. If the thread is in the upper or lower pile fabric, is to check whether there is still a dead pole in the respective upper or lower pile tissue remains when the thread examines x (1); is this the case, there is no correction.  
• 5. If 4. does not apply, the position at which the Thread x (1) was last pattern-forming; to the subsequent one Another pattern point is set to the thread x (1) as a dead pole in the other carpet, where at this point the color of the pattern in question point is to be changed. Is the pattern point to be changed only available once, so it must be left unchanged and make the correction retrospectively at the point where min always attach two identical pattern dots of a different color are present on thread x (1).
• 6. Thereafter, to determine the location of the threads as advance setting for requesting the next sample point of the current status temporarily stored.
• 7. The two demands that at least one dead pole on each Pattern point of the double pile fabric or half of the dead poles, based on two warp courses, should be available by optionally changing the correction conditions (point 4.) realize.

Only after the correction of all warp courses, d. H. after inclusion the correction pattern points into those contained in the computer Sample data is completely saved on a da tträger (floppy disk, Eprom, punched tape) to control the electronically controlled jacquard machine.

An additional correction can be added to the correction calculation Type of pole changing point at which either double jack or Wrinkles arise, are included. This correction is subordinate to that described above, i. H. in that case, if both corrections conflict, the correction has primacy for the dead pole distribution.  

The main advantages of changing the invention Dead pole assignment can be seen in particular in that the dead pole change leads to a larger pattern resolution, whereby the smallest sample point is the area of only one pole leg cross section includes. Furthermore, the existing pattern resolution approximately maintained and the pile thread cross sections enlarged will. This will result in fewer rows of poles for the same pattern per unit length, which increases productivity. When changing the design, the swapping of the colors of the Based on the chore, there is no need to change the chorus Pole coils so that downtimes are significantly reduced and the machine use effect increases.

In the case of two-turn weaves with distributed bindings Dead Pole occurs a qualitative improvement in the double pile fabric and simplification of technological requirements a, because technically and economically advantageous mixed contour free Bindings are used instead of space and cost manoeuvrable jacquard cards small, easily exchangeable data carriers ger are used.

For bindings, the cross choir edging and cards this complicated technology is required simplified that already in the double pile base fabric over the In Formation of the disk one in every second warp course kend reversal of the pile thread assignment is made.

Let through the uniform straight choir edge assembly change of ties with the same number of choirs and the same art color without changing the pole coils on the Kanterge perform.

An embodiment of the invention is in the drawing shown and is described in more detail below. It shows

Fig. 1 shows a longitudinal section through a double-turn fünfchoriges woven by two-shot double-pile with wech selnder assignment of Totpole,

Fig. 2 shows the main elements of a pattern control device in selecting position (A) and the Platinenlitzen in pattern position (B, C, D) for the weft pairs V to VII of FIG. 1,

Fig. 3 shows a longitudinal section through a fünfchoriges dreitourig by woven three-shot double-pile with wech selnder assignment of Totpole,

Fig. 4 shows a longitudinal section through a fünfchoriges dreitourig woven by two-shot double-pile with wech selnder assignment of Totpole,

Fig. 5 shows two longitudinal sections through a double-turn fünfchoriges semi-woven two-shot double-pile warp knit course wise permutation of the Totpolzuordnung,

Fig. 6 shows a longitudinal section through a double-turn fünfchoriges not woven two-shot double-pile with changing assignment of the Totpole,

Fig. 7 shows the flowchart of a kettkursweisen correction calculation of the pattern data of a Doppelflorgewebes.

Fig. 1 shows a simplified longitudinal section through a double-turn by woven double-pile consisting of a Oberflorgewebe 1 and Unterflorgewebe 2, in which the filling stretched between the upper weft yarn 3 and the lower weft thread 4 lying warp thread and the binding warp yarns that incorporate the weft threads in rips or canvas-like bond, are not shown for reasons of overview. The pile threads 6 to 10 are represented by different types of lines. They have the upper and lower pile fabric 1, 2 connecting and the weft threads around looping sections, whereby they form pattern pile and floating sections, whereby they form dead pile. The pile threads 6 to 10 connecting the double pile tissue are cut by a pile knife 11 during tissue transport.

Before the double pile fabric is woven, a double pile base fabric is formed in which the dead pile threads are in the initial position. It is shown between the shot pairs I to III. In the case of an odd number of pile threads per warp course, as in FIG. 1, the pile threads of the divided third choir 8 change their assignment from lower to upper pole and vice versa in every second warp course, so that the number of upper and lower pile threads in the pattern starting position is balanced over the carpet width Chen is. The double pile fabric is patterned between the IV. And XVI. Shown pair of shots. According to the dead pole changes its assignment in that the pile thread as a pattern pile not only forms an even, but also an odd number of pole legs. In Fig. 1, the pile thread 7 between weft pairs VI to VII, the pile thread 10 between weft pair VII to VIII, the pile thread 9 between weft pair IX to X and XII to XIII form only one pile leg. The odd number of pole pieces is mixed with the even number of pole pieces. The latter occurs between the firing pairs IV to VI, X to XII and XIV to XVI. Due to the one-leg pattern and the associated change of the dead pole, short floats can occur in this area under two weft threads 4 of a pile thread coming from the pattern pole and going back into the pattern pole, as between the weft pairs VIII to X and X to XII on the under pile fabric 2 of the FIG. 1 is visible.

The design engineer can limit the number of these short floats if they affect the rear view.

Mixed contours at the pole change points are avoided, inter alia, by the fact that the pattern pole in the fabric changes to the dead pole from which the other dead pole comes, which changes to the pattern pole. Both threads bind together around the weft 4 and form a double lifter there, which is only visible on the back of the carpet. In Fig. 1 double jacks are visible on the weft threads 4 of the weft pairs VI, VII, X and XII. Another type of pole change point arises from the fact that the dead pole, which merges into the master pole, comes from the opposite tissue than the pattern pole, which merges into the dead pole. This creates a missing leg, which is visible in Fig. 1 as a missing connection of the pile threads between the weft pairs VIII / IX and XIII / XIV.

As in Fig. 1, the double pile weaves are shown in Fig. 3 to 6 simplified without the known filling and binding warp threads.

Fig. 3 shows the three-speed woven three-shot weave and Fig. 4 shows the three-speed woven two-shot weave, in which the center weft 5 is missing. Although both bindings show the same structure with respect to the arrangement of the upper weft threads 3 and lower weft threads 4 , in principle two different pole bindings are possible. Fig. 3 shows the classic method of pole binding, in which the lower pile threads 6, 7, 8 from the dead pole of the lower fabric 2 around its upper weft threads 3 in the pattern pile and the upper pile threads 9, 10 from the pattern pile in the dead pole of the upper fabric 1 also around whose weft threads 3 change. This creates pole legs after cutting that are not woven through. Since the exact position of the pole leg is essential in the patterning with only one pole leg, this can be improved by the integration according to FIG. 4. Since each pole leg is woven through, whereby at the pole change, as described in FIG. 1, double jacks can arise. In FIGS. 3 and 4 is illustrated by the weft insertion I to VII Musteraus gear position in which the exact assignment of the dead pole for Oberflorgewebe 1 and Unterflorgewebe 2 is present, which is left during pattern formation due to the changing assignment of Totpole.

For three-ply woven double pile fabrics, it is characteristic that the upper pattern pile 9, 10 binds in the upper fabric 1 via two weft threads and in the lower fabric 2 under one weft thread, while the lower pattern pile 6, 7, 8 in the lower fabric 2 under two weft threads and in the upper fabric 1 over one Weft binds. This rule can remain valid due to the exact dead pole assignment in the sample starting position, whereby the formation of mixed contours in two-shot binding is excluded.

Fig. 5 shows a two-speed, half-woven two-shot weave. The depiction of a changing dead pole assignment in the pattern area was dispensed with, since it should above all be shown that in the case of bindings in which the dead pole assignment between upper and lower pile fabric is generally exchanged in every second warp course, the choir-like exchange is not carried out according to the invention on the canter frame must become.

Fig. E of Fig. 5 shows the normal course of the pile threads in the area of the pattern starting position between the weft pairs I and VII, double-pile base fabric being formed. Fig. E also shows the pattern area in which the upper pile threads 9, 10 in the lower fabric 2 and the lower pile threads 6, 7, 8 in the upper fabric 1 are woven through. If this pole binding was maintained over the double pile fabric width, this would result in larger sample areas which are woven through and not woven through. The sample surfaces with non-woven pole knobs have a very low wear behavior. In practice, therefore, the assignment of the pile threads to the top and bottom pile fabrics 1, 2 has been interchanged in every second warp course and thus alternately woven and non-woven pile nubs of the same choir have been produced over the double pile weave width, whereby the double pile surface has uniform and sufficient wear properties . The exchange of the upper and lower pole threads in every second warp course led to a chessboard-like arrangement on the canter frame, in which the pole coils of two choirs were mixed or crossed. This corresponded to the cross-chorus card beat, where the swapping of the pile threads or chorus had to be taken into account. This complicated technology for weaving semi-woven double pile fabrics can be simplified with the method of changing dead pole assignment. It is necessary that the data carrier in the area of the double-pile base fabric contains information for swapping the dead pole assignment in every second warp course.

Fig. F of Fig. 5 shows that between the pair of wefts III and IV, the reversal of the pile thread assignment takes place, which can also be distributed over several tours. Compared to Fig. E, this creates the same chorus in the opposite fabric through woven pimples. A cross choir canter arrangement was avoided. This also makes it easier to switch to the related single-speed binding technique for symmetrical double pile fabrics according to EP 01 19 184 and DD-PS 2 56 239.

The use of the changing dead pole distribution in the pattern area also applies analogously to non-woven weaves, as was shown in the example of a two-speed weave in FIG. 6. This binding had mixed contours by double knobs before application of the invention. These were created when the upper and lower pole threads changed at the same time. Due to the fiction poles in the pattern area changing according to the invention, double knobs are avoided, as a result of which the binding has become free of mixing contours and an improvement in quality has been achieved.

The binding novelty of changing the dead pole assignment is realized by the use of an electronically controlled jacquard machine. In Fig. 2 of Fig. A, the main elements of the pattern control device of this jacquard machine known according to DD-PS 2 40 223, D 03 C, 3/10 are shown schematically in the pattern selection position in which the pile threads are in the central compartment. Sample control devices of other electronically controlled jacquard machines can also be used if they have a single-speed mode of operation in which any board from any of the three specialist positions can reach any other specialist position. In Fig. 2, the strands 12 are drawn with the eyelets for the pile threads in the line type of the pile threads to be controlled. The board strands 12 are selected in accordance with the pattern information of the data carrier by applying a voltage or no voltage to the electromagnets 13 . Is voltage present, the corresponding Platinenlit zen 12 are attracted to the electromagnet 13 . After the selection, he follows an opposite movement of the walking beam 14 with the Ma gneten 13 and the adhering plate strands 12 in the weft entry or sample position B, C, D, which is followed by the return movement in the selection position A.

Fig. B, C, D of Fig. 2 show in simplified form the pattern positions of the board strands 12 in the weft pairs V, VI, VII of Fig. 1. The electromagnets 13 are in their upper and lower end positions. The board strands 12 occupy three positions to form the upper, middle and lower compartment. Thanks to the pattern control device with no harness and few lifting elements and in connection with the data carrier, all technical and economically effective requirements for changing the dead pole assignment are met, especially since the single-speed pattern selection does not limit the number of tours in the plush and carpet sector and instead of a long and complicated jacquard card a relatively small data carrier can be created in a short time with the help of computing technology.

Due to the changing assignment of the dead poles, the borderline case can occur that in some warp courses the entire dead pole is present either in the upper or lower pile fabric 1, 2 , with a compensation of the number of dead poles in the upper and lower pile fabric 1, 2 being expected over the double pile fabric width is. The entry of the borderline case has the result that a lower Polnoppenhaftkraft occurs in the pile fabric at the places where there is no dead pole, which can not be compensated for in some bonds by the back coating. With symmetric's ties, it is necessary that at least one dead pole is present at each pattern point, since one pile thread each from top and bottom pile fabrics 1, 2 patterns at the same time.

In the half-woven weave of FIG. 5, for reasons of uniform wear resistance, it is necessary that the woven and non-woven pole knobs are formed in half in alternating courses. This requires an even dead pole distribution over two warp courses. When bonds to Fig. 1 to 4 any Totpolvertei lung leads to no disadvantages in the wear resistance, since all pole legs woven through the back and solidification are accessible. Depending on the technological requirements, the unequal dead pole distribution must be restricted. Therefore, according to the invention, a correction calculation in terms of a chain rate is introduced, which is carried out in the computer before the sample data is stored. In principle, there are two requirements for the correction that at least one dead pole or - based on two warp courses - half of the dead poles is available at each pattern point. This correction is to be subordinated to the correction of the defect, whether a double lifter or a missing leg should occur when changing poles. The sequence of steps of the correction calculation is shown schematically in the flow chart of FIG. 7.

First, an initial state (1) is determined in which the pile threads 1 to n in the pile fabric, (n + 1) to i in Under pile fabric and no pile threads in the pattern position Find. This pile thread distribution corresponds to the be written sample starting position. From there starts the correction course by chain course.

Any thread x (1) should be in pattern position B (k) be transferred (2). It is checked whether this thread in the pile fabric A (k) at point k (3) if not whether it is in the under pile fabric C (k) at position k located (4). If this is also not the case, then located he is already in pattern position B (k) at point k (5). So no correction is necessary and the next one can Sample point to be considered (6) when considering whether already all sample points have been processed (14), negative. For example, the following describes how the Correction process in progress. It is assumed that the thread can be found in the pile fabric. This process works analogously, if the thread is in the under pile fabric, why on this part of the description is omitted.

After finding that the sample is too leading thread x (1) in the pile fabric (3), is from a thread is subtracted from the pile thread count in the pile fabric (7), which results in the number of dead pole threads in the upper pile webe remains. Then it is checked whether this number is approximately corresponds to half of the total number of poles (8). Is this the Case, the next sample point (6) is considered. Is the Be  Condition (8) is not met, as is the position retrospectively where x (1) was the last to form a pattern.

To do this, step backwards in the warp course (9) to the corresponding position k has been found (10). After that is on the position k + 1 an additional pattern point of the thread x (1) set (11), whereby a change of the next Po sition in dead pole passing thread x (1) in the opposite set pile fabric takes place. The following is the current one Condition determined (12). Then the question is asked whether be all sample points have already been processed. If not Case, the next sample point is considered (6). Others if the correction calculation is ended.  

List of the reference numerals used

Fig. 1 to 6:
1 pile fabric
2 under pile fabrics
3 weft threads
4 weft threads
5 center weft
6, 7, 8, 9, 10 pile thread (top and bottom pole thread)
11 pole knives
12 wire strands
13 electromagnet
14 walking beams
I to XVI weft pairs or single weft threads
Fig. 7:
A pile thread in the top carpet
B pile thread in pattern position
C pile thread in the bottom carpet
E input value
i, k, K, l, m, n run variable
y yes
n no (outside the program step)

Claims (5)

1. Process for the production of double pile fabrics, in particular of double carpets, with multi-choir arranged pile threads and distributed in the top and bottom pile fabrics, integrated dead pile threads while avoiding mixed contours with an electronically controlled three-position jacquard machine and single-turn pattern selection, characterized in that the assignment of Dead pile threads ( 6 ... 10 ) to the top and bottom pile fabrics ( 1, 2 ) can be changed as desired during the formation of the double pile fabric, so that even and odd pile legs are patterned in the warp course. 2. The method according to claim 1, characterized in that the dead pole threads created by any assignment crossovers in the back compartment in each phase of the double pile tissue formation through the introduction of a sample output position can be eliminated and reset. 3. The method according to claim 1 and 2, characterized in that starting from the sample starting position by a corrective calculation of individual sample data as per chain course be changed that at each pattern point of the double pile tissue at least one dead pole or half the dead poles, related to two warp courses. 4. The method according to claim 1 and 2, characterized in that after an exchange considered in the data carrier from choirs of the upper and lower pile tissue to change the color of the design the choir-like order of the pole reel on the canter frame and the sample starting position stay changed.   5. The method according to claim 1 and 2, characterized in that an exchange of the dead poles of the top and bottom pile fabric ( 1, 2 ) in every second warp course of the double pile base fabric to avoid cross or mixed choir patchwork and sinker distribution is carried out, the choir order of the pole coils on the edge frame remains unchanged.