DE2641417A1 - DEVICE FOR THE PRODUCTION OF PATTERNED CHAINWARE - Google Patents

Abstract

In order to generate large pattern repeats with high guide-bar offsets, along with a relatively high working speed, there are arranged between a pattern warp (1) and a guide bar (6) force-transmission elements (4), by which a pneumatic digitally controllable piston system is formed. The control of the piston system takes place by means of a reader (7) sensing holes in a punched tape. So that the offset achieved by the pattern warp can be compensated, supplemented or replaced, the force-transmission elements are selectively designed to be rigid or of variable length. The working speed can be varied, during the functioning of the pneumatics, by means of a variable-speed motor. The extreme thread demand suddenly occurring in the event of high offsets is supplied to a store (9) likewise controlled via the reader. The apparatus can be selectively mounted on warp-knitting machines and makes it possible to product warp knits with large and versatile patterns. <IMAGE>

Description

Device for the production of patterned warp knitted goods

The invention relates to an apparatus for making patterned ones Warp knitted fabric, which enables highly productive textile fabrics with large pattern repeats.

Patterns in warp knitted fabrics are created through combinations of layers and colors achieved. The guide rail offsets required for the laying are made up of chain links controlled, with part of the stroke generated by the chain links by means of lever or thrust cam ratio is increased. There are also additional gearboxes a is known, with the help of which the offset can be increased by the action of the cam can.

For creping devices on PL-Raschel machines, the offset can be 3 inches amount, where it is divided into more than one row of stitches.

There are also storage bars - position changing devices are known, with whose help the position of the guide rail around a needle division regardless of the influence the pattern chain can be changed chin.

On older crochet galloon machines, weft patterns can be created with the help of pin jacquard devices getting produced.

The maximum offset is limited here by the length of the pins. Through the use of readers for data processing with simultaneous use of digital Actuators can control the offset movement. The offset of the guide rails takes place either directly through a pneumatic adjusting piston system or mechanically, whereby the reader is used to preselect the mechanical offset.

The entry is made by pattern devices based on the bullet-hole principle of parallel shots possible over a constant width.

For securing the extreme thread required for the pattern lightning bolting devices and overtaking gears are known.

The generation of patterns with staggered spacing Sampling parts require additional guide rails and thus also sample chains.

The known devices for patterning warp knitted fabrics have the disadvantage that either the offset of the guide rails by the height of the chain links or length of the pins and the possible leverage are limited, the offset path when using mechanical penetration devices or

Additional shim gear is constant or when using direct the working speed of the digital actuating piston systems acting on the sample rails is relatively low.

By changing positions in directions, the guide rails can be adjusted can only be changed to a limited extent. There is an additional sample chain for the control or control disk required.

When using readers to preselect the size of the mechanical offset, e.g. by means of a pneumatic adjusting piston system or an electromagnetically acting one Due to the interposition of mechanical actuators, the system requires a lot of construction present or the working speed is greatly reduced.

When using the direct pneumatic guide rail control, Although the construction is simplified, the operating speed are also here Limits are set, because the pneumatic drive even with the smallest displacement movement necessary is.

The known flashing devices and overtaking gears have the Night 1, “That they are unable to do that for large, different offsets to cover the necessary thread demand in such a way that excessive thread tension forces are avoided will.

A disadvantage of known devices Lu incorporation of offset arranged pattern parts is that for this purpose additional guide rails and pattern chains are required, whereby the working speed is reduced and the necessary effort increases.

The purpose of the invention is to eliminate the deficiencies indicated and to provide a buildable sample device that enables it to be highly productive to realize very variable patterns.

The invention is based on the object of a new device create that, despite its simple construction, is able to produce large pattern repeats offset with large guide rails at a relatively high working speed to produce. In addition to large offsets, offsets by one needle division should also be immediate be possible one after the other, which means, for example, with little additional guide rail and sample chain effort staggered sample parts can be incorporated.

In this context, it should also be possible to use a ge @ ignored Device to cover the strongly fluctuating thread requirement s @ that no overstretching of the material.

According to the invention, the production of patterned warp knitted fabrics is thereby achieved enables the existing on the knitting machines power transmission elements for the offset movement of the guide rails optionally as a rigid or controllable mechanism, e.g. designed as a digital pneumatic or hydraulic actuating piston system can be and alone or together with the sample chain the guide rail offset carry out. @Each of these controllable power transmission elements is a preferred one cantilevered piston system between the scanning roller of the sample chain or the versatm lever and guide rail is arranged.

For example, through a known reader, the power transmission element can be extended or shortened as required for the offset movement of the guide rail, whereby the zero position of the guide rail can be changed or controlled as required, and with a small number of guide rails there is a large number of patterns available, which in a simple way also enables the incorporation of staggered pattern parts enables.

When switching on the controllable unit in the form of extending or retracting the digital actuators over longer distances will increase the working speed reduced.

When switching the controllable unit to rigid mechanics, the normal chain link control effective. The working speed of the knitting machine is increased again by a known controllable drive.

When the digital actuators take effect, the known Wise extreme guide rail misalignments take place, the arf ind according to the Cetrag the offset generated by the chain links can be increased or reduced.

To the different thread requirements caused by the extreme silts to cover without significant overstretching of the pattern threads, according to the invention from Reader influences a known thread store according to the intended offsets, whereby the thread reserve is released before the actual extreme offset and the thread can be inserted with little tension.

The invention is explained below using an exemplary embodiment will.

The accompanying drawings show: FIG. 1 the operating principle of the device Fig. 2 the transfer of motion to the guide rail the elements of the device according to the invention are shown in the block diagram in FIG. 1 emerged.

Pattern chain 1 and reader 7 can be produced according to the Pattern repeat influence each other, so that z.D-. at the beginning of necessary big Offset sequences through the pattern chain 1 of the reader 7 is switched on and at the end control is taken over again by the pattern chain 1.

In addition, the reader 7 according to the desired offset sequence the thread store 9 is controlled.

The pattern chain 1 transmits by means of a follower roller 2 and an offset lever 3 the lifting movement over that required for the lateral offset movement of the guide rail 6 controllable power transmission element 4j e.g. a ram on the guide rail 6 (Fig. 2).

The controllable power transmission element 4 is known as a digital one Pneumatic or hydraulic actuator piston system consisting of cylinders 5 exists.

The cylinders 5 in the controllable power transmission element 4 are influenced by the reader 7 via the amplifier 8.

The reader 7 acts either directly or via the amplifier 8 on the Thread store 9, which releases the required amount of thread shortly before the offset, whereby the thread tension when offset (especially with large offset) is kept low becomes, resulting in a low thread stress and a low power requirement leads to the misalignment of the guide rails.

The required amount of thread is in the thread store 9 according to the Offset controlled by a digital setting piston system, which is also known.

The optional operation of the controllable power transmission element 4 as rigid mechanics (offset corresponds to chain link height) or as digital Stellltolbensystem enables-especially the production of large pattern repeats with low number of guide bars, low chain link requirement and high working speed.

The cylinders 5 ', 5' ', 5' '', 5 '' '' are e.g. unsupported with possible stroke lengths of 8 inches, 4 inches, 2 inches, 1 inches connected in series, where the tappet of each cylinder with the cylinder bottom of the next cylinder is rigidly connected.

The offset lever 3 is pivotable via a movable link 10 twisted with the bottom of the cylinder 5 ', while the piston rod is the Cylinder 5 '' '' with the guide rail C via a movable link 11 possible communicates.

When all cylinders are fully loaded, e.g. that of the chain links generated offset around; Inches + 4 inches + 2 inches + 1 inch = 15 inches.

If, for example, a pattern set on pattern chain 1 is to be converted into the knitted fabric 15 inches, the switch to control is done by the reader 7 required, with the need to temporarily reduce the effective speed if necessary is. After this large offset, control is back on through the pattern chain switched (maintaining the same signals on the reader) and thus with continued working at the original working speed.

By controlling the cylinders 5 as required via the reader 7 the most diverse even without the pattern chain becoming effective or in combination with it Pattern can be produced.

Claims (4)

Claims 1. Device for the production of patterned warp knitted goods, characterized in that for the offset bowing of laying rails (@) of a warp knitting machine instead of rigid elements built-in externally controllable power transmission elements (4) by a presumably self-supporting pneumatic, digitally controllable piston system are formed and via a reader (7) either in a rigid plunger or in a variable-length actuator are convertible and that of the pattern chain (1) Achievable Vereatz can be compensated, supplemented and replaced in many ways is. 2. Apparatus according to claim 1, characterized in that the corresponding to cover the changing offset required thread requirement via a memory (9) is, which together m @ t the changeable in its longitudinal extension and from the outside controllable power transmission elements (4) via the reader (7) is controllable. 3. Apparatus according to claim 1 and 2, characterized in that the working speed of the knitting machine as a function of extreme guide rail offsets is controllable. 4. Apparatus according to claim 1-3, characterized in that the digitally controllable piston system is designed hydraulically instead of pneumatically.