EP0677606A1 - Method for making a warp knitted pile fabric - Google Patents

Abstract

The invention relates to a method for producing a warp knitted pile fabric using a warp knitting machine with a longitudinally displaceable pole board bar (P) and at least five laying bars (L1-L5), one of which is a laying bar (L1) as a basic bar for forming a fabric base, e.g. Jersey, serves and lay the other laying bars (L2-L5) as sample laying bars at selected points in their working width, especially colored sample threads. In all pattern bars, only every second perforated needle leads a thread and pairs are optionally formed from the pattern bars and within each pair the pattern bars are positioned so that the threads of the other pattern bar of the pair replace the threads left on a pattern bar and that the pattern bars work together that the pattern bars of one pair are shifted according to a pattern and the threads forming the poles are placed over only one pole plate to form pile loops, the pattern appearing through the pattern threads and the two pattern bars of a remaining pair being shifted in this way, that they lay the same goods base as the basic bar. <IMAGE>

Description

The invention relates to a method for producing a warp knitted pile fabric using a warp knitting machine with a longitudinally displaceable pole board bar and at least five laying bars, one of which is a basic bar for forming a fabric base, e.g. Jersey, serves and lay the other bars as pattern bars at selected points in their working width, especially colored sample threads. The displaceable pole board bar is described in DE-PS 24 35 312.

Such a pile is published in a so-called "sample part" in the magazine "warp knitting practice" 3/93 on page 85. From the data given on this page for one of the five bars, namely the L1 bar, it is clear that this bar is the basic bar that is used as a merchandise jersey. Of the other laying bars, the pattern bars L2 - L5, two pattern bars act with all of their piercing needles, ie they are fully drawn in, while the other two pattern bars only carry specially colored pattern threads at the selected points in their working width. In addition to these areas which guide the pattern threads, the perforated needles of the pattern bar concerned remain empty over a considerable length of the working width. When working the fully retracted two pattern bars, they alternately take effect to form pole loops, with each pattern bar that does not lay pole loops, lays the foundation (jersey). The two not fully retracted pattern bars also lay pile loops with their pattern threads. The result of working a warp knitting machine operated in this way is that the pile loops are doubled in the island-like places with the specially dyed pattern threads, so that the goods lose their uniformity at these places.

The invention has for its object to provide a method for producing a warp knitted pile fabric in which no pile of pile loops occurs. According to the invention, this is done in that in all pattern bars only every second perforated needle leads a thread and pairs are optionally formed from the pattern bars and within each pair the pattern bars are positioned in such a way that the threads of the other pattern bar of the pair occur instead of the threads omitted on a pattern bar , and that the pattern bars work together in such a way that the pattern bars of the one pair are offset according to a pattern and the threads forming the poles are placed over only one pile plate in each case to form pile loops, the pattern appearing through the pattern threads and the two pattern bars of a remaining pair are moved so that they lay the same goods base as the basic bar.

Due to the measure that only every second perforated needle has a thread in all pattern bars, it is possible to operate two pairs of pattern bars in a five-bar machine in such a way that the two pattern bars are positioned in relation to one another within each pair so that they extend The threads of the two pattern bars complement each other via the font of the warp knitting machine, in the sense that the threads follow each other without gaps. Within the scope of such a pair, a uniform pile fabric can then appear, in which, due to the sample threads lying at selected points, which may be differently colored, these can simultaneously migrate across the fabric in opposite directions, ie appear accordingly as pile threads. The two remaining pattern bars of the other pair act the same reason as the basic bar, so that the pattern threads of these pattern bars practically do not appear. Pairing is now possible in many ways in the case of a warp knitting machine with four further pattern laying bars in addition to the basic laying bar, namely based on a designation of these four pattern laying bars with L2, L3, L4 and L5 in the following way: Couple 1 Pair 2 2 + 3 4 + 5 2 + 4 3 + 5 2 + 5 3 + 4 3 + 4 2 + 5 3 + 5 2 + 4 4 + 5 2 + 3

This results in six different combinations and accordingly a large variety of pattern formation, since each of them can be used to form pairs because of the uniformity of the thread assignment of the pattern laying bars. In order that pole positions are not disturbed by a basic foundation, the offset of the pattern bars, which are offset according to the pattern, is selected such that the pile-forming threads are placed over only one pile plate.

In order to create a closed image of pile goods in which there are practically no omission points, i.e. locations without pile loops, the method is expediently designed such that the threading of the threads through the perforated needles of the pattern laying bars extends essentially over the entire working width. Due to the extension of the guidance of the threads in the sense of occupying only every second perforated needle in all pattern laying bars, a uniform product image results, in which pile loops appear regularly across the entire product without omissions and without accumulations.

Fig. 1

ein Legungsbild, das die durch die Grundlegebarre und die vier Musterlegebarren gelegten Fäden zeigt, und

Fig. 2

eine schematische Darstellung einer gemusterten Ware, die sich aufgrund der Legungen gemäß Fig. 1 ergibt.

An exemplary embodiment of the invention is shown in the figures on the basis of a warp knitting machine with five laying bars, namely a basic laying bar and four pattern laying bars. Show it:

Fig. 1

a laying pattern showing the threads laid by the basic laying bar and the four pattern laying bars, and

Fig. 2

is a schematic representation of a patterned product, which results from the laying according to FIG. 1.

1 shows the laying of five laying bars of a warp knitting machine, namely the basic laying bar L1 and the pattern laying bars L2, L3, L4 and L5, in a conventional, schematic representation. 1 also shows the movement of the displaceable pole board bar provided in the underlying warp knitting machine, shown on the movement of the pole plate P, which executes a reciprocating movement and is thereby offset by a needle pitch in each case. The individual points of the transverse rows of points represent the individual knitting needle operations of the warp knitting machines, which are repeated per main shaft revolution of the machine, which is indicated by the in Longitudinal rows of dots are indicated. In order not to impede the clarity of the illustration, corresponding further lines per knitting needle are indicated on the right next to the meandering line P by a thin drawing, which is intended to show the total movement of all the pole plates of the pole plate bar used.

The laying bar L1 carries out a laying forming a jersey fabric base, in which no pole is formed due to the offset of the pole board bar (see above-mentioned DE-PS 24 35 312). This arrangement is shown above the reference symbol L1. The laying is repeated over all perforated needles of the laying bar L1, i.e. 1 about the laying shown in reference numeral L1 is repeated at every point, both in the transverse direction and in the longitudinal direction, since all perforated needles of the laying bar have been drawn in in a known manner for the formation of the jersey.

Because of the clarity of the illustration, in addition to the layout shown at reference number L1, the other layouts are omitted.

This is followed by the laying of the pattern bars L2, L3, L4 and L5.

Only one in every two perforated needles carries a thread on these bars, ie when all the layers are completely represented by the L2 bar, there is only one layer in the lateral direction at the point after the next. However, similar to the illustration for the laying bar L1 in FIG. 1, these further layers are not included. The laying of the laying bar L2 leads to a course of stitches per main shaft revolution, which are individually on the right side of FIG. 1 with 1 to 9 etc. are designated. From stitch 1 to stitch 2 there is a pole due to a laying over the respective pole plate. In the same way, a pole is placed between the stitch rows 2 and 3 and so on, the thread concerned initially moving to the left and then back again to the right by a corresponding offset of the laying bar L2.

The laying bars L2 and L3 together form a pair, the laying bar 3 being positioned relative to the laying bar L2 such that, due to the fact that one perforating needle is left empty on the laying bars L2 and L3 and a corresponding positioning of these two laying bars with respect to one another, the piercing needles of the laying bar L3 are offset Place a stitch in each of the gaps left by the bar L2 and vice versa. This creates a full mesh of knitted goods. This can be seen from FIG. 1 by the fact that in the course 1 there is a distance of three courses between the drawn courses above L2 and L3. A stitch laid by the laying bar L3 in the course 1 therefore follows the stitch in question from the laying bar L2 immediately to the right and to the left, which is indicated by the dashed lines L3 ', by which threads laid by the laying bar are represented. However, for reasons of clear presentation, these are only indicated by the dashed lines and are not continued over the entire FIG. 1. The pattern bar L2 is laid out like the pattern bar L3, but with a course in the other direction.

After the course 9, the pattern changes. This is followed in section B by the laying bars L2 and L3, which are pure jersey laying, with the only thing to note is that these laying, as already explained above, is to a certain extent in insert the layers of the other laying bar, since in area B (from stitch row 9 to stitch row 17) every stitch omitted by one laying bar is filled by a stitch from the other laying bar.

The same considerations apply in principle with regard to the laying by the pattern laying bars L4 and L5, however, with these laying bars with the row of stitches 1, jersey laying begins, which is then pushed back into one another, followed by poling in area B, similar to those in the area A are performed by the L2 and L3 bars.

After the row of stitches 17 in area C, an exchange of the pairs of pattern bars is carried out, namely the pairs L2 / L3 and L4 / L5 which have been effective until then are changed to L2 / L5 and L3 / L4. These pairs of laying bars then again carry out jersey laying and pole laying, as have been described above for area A and B. The new pair formation can be seen more clearly from the mesh of FIG. 1.

So that a pattern can now be recognized in the finished product thus knitted, the pattern laying bars L2, L3, L4 and L5 each receive specially colored pattern threads at selected points in their working width. In the exemplary embodiments shown, the laying rail L2 places a pattern thread shown in red above the reference symbol L2. Such a common thread follows the bar L2 at the following 10th perforated needle if one wishes to obtain the pattern shown in FIG. 2, which will be discussed in more detail below. The other perforated needles of the bar L2 are covered with threads of any basic color, for example in white.

The laying bar L3 receives a gray pattern thread and places it in the manner shown in FIG. 1. To create a symmetrical pattern, further gray pattern threads follow each of the 10th needle on the L3 bar. The remaining perforated needles of the laying bar L3 are then covered with sample threads of the same basic color as is the case with the laying bar L2.

Correspondingly, the laying bars L4 and L5 receive a pattern thread in blue or green color, the remaining perforated needles being covered with pattern threads of the same basic color as in L2 and L3.

1, the appearance of a pattern according to FIG. 2 results, in which the black places the red pattern thread, the places with the dot the gray pattern thread, the places with the circle the blue pattern thread and the Represent the green pattern thread with a cross. In the areas in between, the basic color white is uniform. The entire fabric is evenly covered by pile loops, with intersecting lines in the specified colors. Corresponding color mixtures result at the intersections of the lines.

The exemplary embodiment shown is a deliberate simplification in order to facilitate the illustration. In the normal case, several pattern threads of the same color can be drawn in side by side on a pattern laying bar (but always with the omission of a piercing needle), so that crossing strips result according to the pattern according to FIG. 1.

By varying the laying of the pattern laying bars L1, L2, L3 and L4 and drawing in the desired colored pattern threads at the selected locations, any number of further patterns can be created.

Claims (2)

Method for producing a warp knitted pile fabric using a warp knitting machine with a longitudinally displaceable pole board bar (P) and at least five laying bars, one of which is used as a basic bar (L1) to form a goods base, e.g. jersey, and the other bars are used as pattern bars ( L2, L3, L4, L5) lay specially dyed pattern threads at selected points in their working width,
characterized in that
in all pattern bars (L2, L3, L4, L5) only every second perforated needle leads a thread and pairs (L2 / L3, L4 / L5; L2 / L5, L3 / L4) are optionally formed from the pattern bars and the pattern bars within each pair are positioned relative to one another so that the threads of the other pattern bars of the pair replace the threads left on a pattern bar, and that the pattern bars (L2, L3, L4, L5) work together in such a way that the pattern bars of the one pair (L2 / L3) form a pattern are shifted accordingly and the pile-forming threads are placed over only one pile plate (P) to form pile loops, the pattern appearing through the sample threads and the two pattern bars of a remaining pair (L4, L5) are shifted so that they lay the same goods base as the basic bar. Method according to claim 1, characterized in that the guiding of threads through the perforated needles of the pattern laying bars (L2, L3, L4, L5) extends essentially over the entire working width.

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