TWI730121B - Warp-knitting machine and method for manufacturing a warp-knitted fabric - Google Patents

Abstract

A warp-knitting machine having knitting needles (3), guide needles (1), and sinker assemblies having knock-over edges (15) and downholders (5) is specified, wherein the knitting needles (3), the guide needles (1), and the sinker assemblies are in each case disposed beside one another in a width direction. The intention is to obtain a large multiplicity of production possibilities. To this end, it is provided that the sinker assembly has knock-over sinkers (4) and downholders (5) that are separate from the knock-over sinkers (4), wherein the knock-over sinkers (4) and the downholders (5) on at least part of the respective motion paths thereof are drivable by way of dissimilar movements.

Description

Warp knitting machine and method for manufacturing warp knitting fabric

The present invention relates to a warp knitting machine with knitting needles, guide needles, and a sinker assembly with a knock-off edge and a lower holding member, wherein the knitting needles, guide needles, and sinker assemblies are in each case The width direction is arranged side by side with each other.

The present invention also relates to a method for manufacturing a warp knitted fabric, in which the yarns of a yarn group are guided by the guide needles relative to the knitting needles, wherein when the loop has been unlooped, the lower holder will Pierce the yarn group.

Different types of warp knitting machines have different fabric take-out directions and other aspects. When the fabric, that is, the warp knitted fabric that is made, is taken out in an almost straight manner, or at a large oblique angle with respect to the fed yarn, the warp knitted fabric that is being taken out when the knitting needle is A new loop forming process will maintain the loops on the knitting needles when ascending, so as to be able to receive the warp yarns on the heads of the knitting needles. If this kind of fabric is taken out, which is especially used in a raschel warp knitting machine, a rougher warp knitted fabric will be caused, and the skin will feel uncomfortable when worn.

When the warp knitted fabric is taken out at a small angle relative to the fed warp yarns, such as in the case of an automatic warp knitting machine, the loops must be buckled so that the knitting needles Able to ascend without leading the loops. In this case, a so-called locking knock-off sinker will be used, which has a knock-off edge, a locking mold, and a lower holder. When the knitting needles ascend, the lower holding parts cause the loops on the shafts of the knitting needles to be buckled on the bottom layer.

The invention is based on the purpose of disclosing yet another possibility for manufacturing a warp knitted fabric.

This objective will be achieved in the case of the aforementioned warp knitting machine, in which the sinker assembly has a knock-off sinker and the lower holding member is separated from the knock-off sinker, wherein the sinker is separated from the The ring sinker and the lower holding member can be driven by different motions in at least a part of their respective motion paths.

Using such a design embodiment, warp knitted fabrics can now be manufactured with lower tensions, which would otherwise only be made on so-called Raschel knitting machines. That is, for example, a lace fabric can only be made on a Raschel warp knitting machine so far, so it has a high tension which will cause a rough touch, and it will be used on a newer warp knitting machine. production. It can make the knock-off sinker and the lower holding piece move at least temporarily in a mutually separated manner. In the other zone of the movement path, the knock-off sinkers and the lower holder can also be moved together, as will be described in a later stage.

The lower holder driver preferably acts on the lower holders in a width direction, whereby the lower holders can be repositioned relative to the knock-off sinkers in the width direction by the lower holder driver. Repositioning in this width direction is also called "lateral shift". When the lower holders are offset laterally, that is, they are repositioned in the width direction, the lower holders move the yarns together in a corresponding manner. Therefore, the lower holding parts have a temporary bottoming effect.

The lower holder driver preferably has a drive stroke in the width direction, which will shift the position of the lower holder in the collision-free zone between the two knitting needles to another one between the two knitting needles. Collision zone. The pitches of the knock-off sinkers and the lower holders correspond to the pitches of the knitting needles. The knock-off sinker and the lower holding piece are arranged in the needle groove between the knitting needles in an initial position. These knitting needles can also be referred to as "operation needles". When the lower holders are repositioned laterally, and the lateral repositioning corresponds to the pitch of the knock-off sinkers, or an integer multiple of the pitch of the knock-off sinkers, they are The yarn impacted by the lower holder will similarly shift laterally by a pitch of the knock-off sinkers, or an integral multiple of the pitch of the knock-off sinkers. Therefore, an artificial underlay between two adjacent loops will be achieved, as described. The driving stroke can also deviate from the correct pitch, as long as the knitting needles can move between the lower holders in a collision-free manner.

The lower holder driver preferably repositions the lower holder in a linear yarn path between a guide needle and a knitting needle in each case. Therefore, the linear yarn diameter will be disturbed, so that the knitting needles can rise when the lower holders are repositioned sideways, and the lower holders will then buckle the yarns on the knitting needles. On the shaft. Such a relatively tension-free knitted fabric can be made.

The knock-off sinkers and/or lower holders preferably have at least a part of a locking mold. The remaining parts of the locking die can be formed by the lower holders or knock-off sinkers respectively. Therefore, a design embodiment similar to the traditional locking and knock-off sinkers will result in at least a part of a loop forming process.

The lower holder driver is preferably synchronized with a knitting needle driver, so that the lower holder driver will cause the lower holders to move in the width direction before the knitting needle driver causes one of the knitting needles to move up. Offset. Therefore, the lower holders will initially shift laterally. Then, the knitting needles will rise, and the lower holders will hold the yarns.

If it is the method mentioned in the beginning, the purpose will be achieved, wherein the lower holders separated from the knock-off sinkers will be used, and the lower holders without these knock-off sinkers will be knitted in the knitting The needle shifts laterally before ascending.

As mentioned above, a knitted fabric can be made in this way, which is low tension and can be designed in the same way in other respects, as it has been possible so far only by a Raschel warp knitting machine. For example, a decorative fringe can be made with extremely low tension.

Therefore, it becomes possible for a knitted fabric to be manufactured with finer yarns, which in many cases results in a completely new tactile and/or visual appearance.

The lower holders preferably interfere with one of the straight lines between the guide needles and the knitting needles in each case. Therefore, the yarns will move out of this straight line.

It is also more advantageous that when the lower holders are offset laterally, they move from one position in the collision-free zone between the two knitting needles to another collision-free zone between the two knitting needles. The lower holding members are repositioned from one needle groove between the knitting needles to the other needle groove, so that the lower holding members will not interfere with the knitting needles when they rise.

The lower holders preferably offset a part of the yarns laterally when they are underneath. The artificial bottoming will be achieved, as described.

When the lower holders pierce the yarn group, the knock-off sinkers preferably move together with the lower holders. This movement is perpendicular to the width direction. In this case, each yarn will create a loop of sinker by this movement of the knock-off sinkers.

When the knitting needles are lowered, the knock-off sinkers and the lower holders preferably move back. This movement can also be performed in the last part of one of the descending movements of the knitting needle. The knock-off sinkers and the lower holder are tied in their initial positions before the next loop is formed into a loop.

Figures 1a and 1b schematically show the components of a warp knitting machine, in particular a guide needle 1 is constructed here as a needle and has a hole to guide a yarn 2, a knitting needle 3 is also called One "operating needle", one knock-off sinker 4, and a lower holder 5.

Figure 1a schematically shows the loop-off, which here is assumed to occur with a 0° rotation angle of a main shaft (also not shown) of the warp knitting machine.

Fig. 1b shows an embodiment of the components of the warp knitting machine, which is slightly modified from Fig. 1a.

In the case of the design embodiment shown in FIG. 1a, a locking mold 7 is constructed as a part of the knock-off sinker 4. If it is the case of the design embodiment shown in FIG. 1 b, the locking mold 7 is constructed on the lower holder 5. The required locking when the knitting needle 3 rises can be achieved by the interaction of the knock-off sinker 4 and the lower holder 5.

In the case of a loop forming procedure, the knitting needle 3 (relative to the diagrams in Figures 1a and 1b) will move up and down. The guide pin 1 (again with respect to the diagrams in Figures 1a and 1b) will move from left to right, and then from right to left, and in between will be perpendicular to the plane of the drawing twice. The knock-off sinker 4 and the lower holding member 5 move in the direction of the double arrow 6. The lower holding member 5 forms a separate component from the knock-off sinker 4, wherein the knock-off sinker 4 is used for the functions of ring-off and locking, and the lower holding member 5, in addition to being in the In addition to moving in the direction of double arrow 6, it can also be moved perpendicular to the plane of the drawing. A lower holder driver used here is not shown in more detail. In a manner similar to the driver of a rod to which the guide pins 1 are fixed, the lower holder driver can be arranged at one end of the respective rod, and can be acted on by a cam disc or the like On a pole, it will bring the lower holding parts 5.

Fig. 2 shows a second step in a three-dimensional schematic diagram. This second step is related to the "locking", which will occur, for example, at a rotation angle of 40° of one of the spindles.

When the loop is unlooped, the knock-off sinker 4 and the lower holder 5 move transversely to the width direction of the warp knitting machine. This movement is called "forward". The lower holding member pierces a yarn group, which is formed by a plurality of yarns 2. The knock-off sinker 4 pushes the loops forward by the locking mold 7. A sinker loop is formed by this shifting forward. The knock-off sinker 4 and the lower holding member 5 will move forward and backward together, that is, transverse to the width direction, in the direction of an arrow 8. A size 9 for so-called "locking" is additionally shown in FIG. 3. This size is caused by a gap between the locking mold 7 and the spikes of the needle 3, that is, the distance from the side of the needle 3 facing the locking mold 7 to the locking mold.

As can be seen in FIG. 2, a removal direction 10 is approximately the same as the movement of the knock-off sinker 4 and the lower holder 5, and the movement is indicated by an arrow 8. The take-out direction 10 extends substantially orthogonal to one of the average feeding directions of the yarns 2. The angle can also be greater than 90°. However, the angle is less than 180° in any case. Therefore, no traction force that may lead to extreme curing will be exerted on the rings by the removal.

In FIG. 2, a breast portion 11 of the knitting needle and a head 12 of the knitting needle can also be seen. The knitting needles 12 are here constructed as composite needles and have side edges 17 and the like.

Figure 4 shows a third step in the formation of the loop, that is, the displacement of the bottom layer.

When the lower holding members 5 pierce the yarn group 2, the lower holding members 5 will be laterally offset by at least one needle pitch of the knitting needles 3. Before this, that is, when in the initial position, the lower holding members 5 are similarly in a needle groove between the two knitting needles 3, that is, in the same position as the knock-off sinkers 4. The bottom layer of the burrs will be displaced by the offset movement of the lower holders 5, and a loop on the shaft of the knitting needle 3 will be opposite to the breast protrusion 11 of the rising knitting needle 3 (See Figure 2) was dropped. The offset of the lower holding members 5 and the displacement of the yarn and the temporary bottom layer caused by it can be one or more needle pitches. However, the lateral interconnection of one of the loop rows does not need to be caused under the circumstances of this procedure. The offset movement of the lower holding parts is shown by an arrow 14. However, the knock-off sinkers 4 remain in their original positions in the width direction.

Figure 5 shows a fourth step in which the overlay will be performed. During the overlapping period, the lower holding members 5 will continue to keep the bottom layer in position. Therefore, the loops 13 located around the knitting needles 3 will remain stopped on the shafts of the knitting needles 3.

Fig. 6 shows a fifth step in which the knitting needle 3 is lowered. When the knitting needle 3 descends, that is, when the knitting needle 3 moves from top to bottom, the lower holding member 5 will move backward (perpendicular to the plane of the drawing with respect to FIG. 6). The translation will be cancelled. The bottom layer will be released. The loop 13 can be unlooped. In this regard, the knock-off sinker 4 may have an additional knock-off device 15. The decoupling device 15 is advantageous, especially when the rings 13 are decoupling, they do not traverse the decoupling sinker 4 (see FIG. 6). In this regard, it can provide a channel for the knock-off device 15 to bridge between the knock-off sinkers 4.

Since the knock-off sinker 4 is set in the same direction as the running direction of the burr, the ring 13 to be knocked off can be connected laterally with respect to the newly formed ring ring, which can be used for the knock-off sinker. The knock-off device 15 on the sinker 4 is built. Figure 7 shows this step in a side view. The lower holding member 5 will move backward together with the knock-off sinker 4, that is, along the arrow 16. This movement can be done together. The knitting needle 3 shown here with the side edge 17 can be drawn through the "old" loop 13.

Because the loops do not have to be held on the shaft of the knitting needle 3 with high traction for the take-out fabric, but are held by the lower holders 5, a warp knitted fabric can be controlled with a lower tension to make. Therefore, spun yarns with a limited tensile strength can also be used for manufacturing.

The reason is that lace fabrics that can only be produced on Raschel warp knitting machines so far can also be manufactured. A lace fabric of this kind was previously made with high tension, so it has a rougher touch. Using the lower holding members 5 which can move in a lateral manner, that is to say in the width direction, a warp knitted fabric with a significantly lower tension can now be made, even a lace fabric.

As mentioned above, the offset movement of the lower holding members 5 to enable the yarn to be displaced may be one of the needle pitches of the knitting needles 3, or another of the needle pitches of the knitting needles 3 Integer multiples. This pitch corresponds to the pitch of the lower holders 5 and the pitch of the knock-off sinker 4. The pitch does not need to be accurately maintained, as long as the lower holding members 5 can move between the knitting needles 3 in a collision-free manner.

As can be seen in particular in FIGS. 4 to 6, the interference of one of the straight lines between the guide needles 1 and the knitting needles 3 will be caused by the lateral deviation of the lower holding parts 5. As can be seen in particular in Fig. 4, an intermediate distance 18 of the yarns 2 forming an artificial underlayer can be caused by this interference.

The loop-off device 15 is especially used to enable loop-off of a lace.

The lock size 9 is one of the standards of tension used in the warp knit. It is possible that a loose sinker loop can be made, which has a good effect on the tactile feel of the warp knitted fabric.

The artificial bottom layer is caused by the lateral deviation of the yarns 2, which is caused by the lower holders 5, so the looser burrs can also be made by the warp knitting machine.

1‧‧‧Guide pin 2‧‧‧Yarn 3‧‧‧Knitting needle 4‧‧‧Drop off sinker 5‧‧‧Next Holder 6, 8, 14, 16‧‧‧Movement direction 7‧‧‧Locking mode 9‧‧‧Lock size 10‧‧‧Removal direction 11‧‧‧Chest protrusion 12‧‧‧Head 13‧‧‧Circle 15‧‧‧Looping device 17‧‧‧side 18‧‧‧Intermediate distance

The present invention will be described later with a preferred embodiment in conjunction with the drawings, in which: Figures 1a and 1b show schematic diagrams of the components of a warp knitting machine; Figure 2 shows a part of a loop forming process for these components Fig. 3 shows a view of the elements of Fig. 2 with the yarn omitted; Fig. 4 shows a third step in the loop formation procedure; Fig. 5 shows the formation of the loop A fourth step in the procedure; Fig. 6 shows a fifth step in the loop forming procedure; Fig. 7 shows a schematic diagram similar to Fig. 1.

1‧‧‧Guide pin

2‧‧‧Yarn

3‧‧‧Knitting needle

4‧‧‧Drop off sinker

5‧‧‧Next Holder

6‧‧‧Movement direction

7‧‧‧Locking mode

10‧‧‧Removal direction

15‧‧‧Looping device

Claims (13)

A warp knitting machine, which has a knitting needle, a guide needle and a sinker assembly, the sinker assembly has a knock-off edge and a lower holding member, wherein the knitting needle, guide needle and sinker assembly are in each case The lower parts are arranged side by side in a width direction; the sinker assembly is characterized in that the sinker assembly has a knock-off sinker and a lower holding piece, and the lower holding parts are separated from the knock-off sinker, and the sinker assembly The ring sinker and the lower holders can be driven by different motions at least on a part of their respective movement paths; wherein the lower holder driver acts on the lower holders in the width direction, by Driven by the lower holder, the lower holders can be repositioned relative to the knock-off sinkers in the width direction. Such as the warp knitting machine of claim 1, wherein the lower holder driver has a driving stroke in the width direction, and the driving stroke shifts the position of the lower holder in the collision-free area between the two knitting needles To another collision-free zone between the two knitting needles. Such as the warp knitting machine of claim 1 or 2, wherein the lower holders and the knock-off sinkers can be jointly repositioned transversely to the width direction. Such as the warp knitting machine of claim 1, wherein the lower holder driver repositions the lower holder in a linear yarn path between a guide needle and a knitting needle in each case. Such as the warp knitting machine of claim 1, wherein the knock-off sinkers have at least a part of a locking die. Such as the warp knitting machine of claim 1, wherein these The lower holding member has at least a part of the locking mold. For example, the warp knitting machine of claim 1, wherein the lower holder driver is synchronized with a knitting needle driver, so that before the knitting needle driver causes one of the knitting needles to move upward, the lower holder driver will This causes the lower holding parts to shift in the width direction. A method for manufacturing a warp knitted fabric, in which the yarns of a yarn group are guided by guide needles relative to the knitting needles, wherein once the loop is released, the lower holder will pierce the yarn group; It is characterized in that the lower holding parts separated from the knock-off sinker are used, and the lower holding parts, without the knock-off sinker, are offset laterally before the knitting needles are raised. Such as the method of claim 8, wherein the lower holders interfere with the straight line between the guide needles and the knitting needles in each case. Such as the method of claim 8 or 9, wherein the lower holders cause a part of the yarns to shift laterally during the padding. Such as the method of claim 8, wherein the lower holding members are laterally offset from one position in the collision-free zone between the two knitting needles to another collision-free zone between the two knitting needles. Such as the method of claim 8, wherein, when the lower holders pierce the yarn group, the knock-off sinkers move together with the lower holders. Such as the method of claim 8, wherein, when the knitting needles descend, the knock-off sinkers and the lower holders move back.

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