EP3460112B1 - Method for incorporating a warp knitting machine and warp knitting machine - Google Patents

Description

The present invention relates to a method for incorporating a warp knitting machine, with guide needles, knitting needles and Nadelgassen between the knitting needles, wherein the guide needles with retracted threads at clamping positions in which a hole of the guide needles with a catching space of the knitting needles, moved relative to knitting needles and stopped there and the threads are tightened there.

Furthermore, the invention relates to a warp knitting machine with guide needles, at least one knitting needle with knitting needles and Nadelgassen between the knitting needles, at least one main shaft which moves the guide bar and the knitting needle relative to each other, a main shaft driving motor and a motor controlling the machine control.

Incorporation of a warp knitting machine is a process required before the warp knitting machine makes a knitted fabric from a warp can. The incorporation is always required, for example, when a new chain is pulled into the warp knitting machine.

A warp knitting machine has at least one guide bar and at least one knitting needle bar. In the production of the knitwear, the guide needles, which are also referred to as "needles", moved after a predetermined movement relative to the knitting needles. As a result of this movement, the stitches of the knitted fabric are formed, with further knitting tools usually being involved in this process.

To incorporate the warp knitting machine, it is first necessary to collect the threads of the chain in the guide needles. The guide needles are attached to a guide bar. When pulling the threads into the guide needles, the bar is often moved to a position in which it is easier for an operator to access. After pulling the threads into the guide needles, the guide bar is then mounted at its operating position.

The operator then sets the warp knitting machine into operation at a very slow speed in the so-called "creeper", namely until the guide needles are in a position in which they are about to pass through alleys between the knitting needles. Here the warp knitting machine is stopped and the operator checks whether the guide needles can be moved through the alleyways of the knitting needles without collision. If this is not the case, the position of the guide bar must be corrected.

Then the guide needles consider, ie they drive past the knitting needles on one or more streets. Then, the guide needles are again moved forward and must be stopped in a correct position, in which the catching space of the knitting needles coincides with a thread guide portion of the guide needles, usually a hole or eyelet. This position is referred to as "center hole" for short. Then the threads are stretched by hand or tightened.

Thereafter, another stitching cycle is run, usually one revolution of the main shaft. Here, the knitting needles lower again. The guide needles carry out the underlay. The knitting needles rise again and the guide needles carry out the consideration and then have to stop again in the position "center hole". Then the threads are stretched or tightened again.

This process can be repeated for any number of stitches. It is repeated until all stitches have been formed over the entire web width. Thereafter, the drive of the tree from which the chain is withdrawn, can be turned on and later a fabric take-off can be used.

The incorporation requires a certain amount of skill from the operator. Depending on the skill, incorporation takes more or less time. Operators who have the necessary experience of working in are not always available. The longer the incorporation takes, the less time is available for the production of knitwear, which has a negative effect on the productivity of the warp knitting machine.

The invention has for its object to enable high productivity of a warp knitting machine.

This object is achieved by a method having the features of claim 1.

The operator only has to transmit a start signal to the warp knitting machine, more precisely to the machine control of the warp knitting machine. Thereafter, the machine control drives the guide needles exactly in the clamping position in which matches the hole of the guide needles with the catching space of the knitting needles. In this position, the machine controller stops the warp knitting machine so that the operator can manually perform the tightening or tightening of the threads in this position. The operator does not have to approach the clamping position. The clamping position is rather approached automatically, resulting in a considerable time savings. It is also less experienced operators to incorporate the incorporation of the warp knitting machine.

Preferably, the machine controller indicates reaching the clamp position and enters an input-wait mode. When the warp knitting machine stops, some operators do not know why the machine stops and what to do now, due to lack of experience. This problem can be avoided by the machine control displaying the reaching of the clamping position on a display. This can be done in text form or reaching the clamping position can be indicated by a symbol or a pictogram. For this purpose, the display device expediently has a display. The display device may then also indicate to the operator that an input is expected. For example, after having tightened the threads, the operator may then give a restart command so that the machine controller controls the next stitching operation, eg, continues to rotate the main shaft one turn, and then stops the guide needles in the "center-hole" position , Thereafter, the display device may indicate the reaching of the clamping position again, so that the operator can tighten or tighten the threads. This process can be repeated as many times as necessary.

In a preferred embodiment, in the input-wait mode, the machine controller allows only one predetermined type of input Users too. Thus, the operation by the operator is further simplified. The operator can only select from a limited supply of input options so that the risk of erroneous input is kept low.

Here, it is preferable that the engine controller in the input wait mode allows a stitching instruction and an axle-on command. In the stitching instruction, another stitching operation is performed until the guide needles have returned to the clamping position. There, the operator can then tighten the threads again and at the same time check that all stitches have been formed. At the beginning of the incorporation, it is not uncommon that not all threads form stitches. After a few stitch forming operations, however, all stitches should have been formed across the width of the warp knitting machine. If so, then the operator may give an axle-on command. The "axes" are a short name for further units on the warp knitting machine. For example, the tree drive, the fabric take-off and the reel each have an axis. In the broader sense, one can also designate a monitoring device, for example a camera, as an axis. However, the instruction set is limited to a few choices in addition to the stitching instruction. For example, if the operator gives a tree-on command, it causes a tree drive to rotate the tree and the tree can recharge threads of the chain. The axis-on command may concurrently include a stitch-forming command, or the stitch-forming command may be given in temporal relation to the axis-on command.

In a preferred embodiment, the guide needles are moved before movement into the clamping position by the machine control in a control position and stopped there. The control position is the Position of the guide needles just before they pass through alleys between the knitting needles. In the control position, the operator can check whether the guide needles can be moved between the knitting needles without collision. If this is not the case, the position of the guide bar must be corrected. Even the start of the control position requires a certain skill or experience of the operator. If the start of the control position is done automatically by the machine control, the incorporation of the warp knitting machine can also be done by less experienced operators.

Preferably, one corrects the clamping position by hand and the machine control stores the corrected clamping position. The machine control is thus self-learning. If the operator recognizes that the clamping position, which has been hit by the machine control, is not optimal for some reason, then it can correct this clamping position and, if necessary, transmit a memory command to the machine control. During the next incorporation process, the machine control can then automatically approach the corrected clamping position. The same applies in principle to the control position.

The object is achieved by a warp knitting machine having the features of claim 7.
The main shaft is in this case provided with a rotary encoder or other device which determines information about the angular position of the main shaft. The machine control is then able to stop the main shaft exactly in the angular position at which the guide needles are in the clamping position, ie the position "center hole". The operator can then tighten or tighten the threads by hand and initiate the next stitching operation.

Preferably, the machine control is connected to a tree drive. If all the stitches have been formed over the working width of the machine, then one can begin to supply strings from the tree.

Einzige Figur:

ein Flussdiagramm zur Erläuterung des Verfahrens.

The invention will be described below with reference to a preferred embodiment in conjunction with the drawings. Herein shows the

Only figure:

a flowchart for explaining the method.

The figure shows a flow chart with individual process steps.

In a first step 1, the warp knitting machine is prepared so far that the threads of a chain have been included in guide needles of a guide bar. For example, the guide needles have a hole through which a thread has been guided. The guide bar is mounted in the position in which it is later arranged during operation of the warp knitting machine. If further guide bars are used, these are fed in at the same time or later, assembled and incorporated.

The tree that delivers the chain is shut down. Preparatory work, such as entering the measured perimeter of the tree into the machine control, has been completed.

In a step 2, an operator via a non-illustrated operating device, a start signal to the Machine control. This start signal may be, for example, that the operator presses a button or touches a surface on a touch-sensitive screen, which is for example marked by a "start" symbol.

The machine control moves the guide needles into a control position in a step 3. For this purpose, the machine control system controls a motor which drives a main shaft of the warp knitting machine. The main shaft in turn affects the guide bar and on a needle bar.

The control position is a position in which the guide needles are just before swinging through Nadelgassen the knitting needles. The operator can check in this position whether the guide needles can be moved through the needle gaps without collision. If this is not the case, the position of the guide bar must be corrected accordingly.

The control position may be, for example, at an angular position of 110 ° of the main shaft. For this purpose, the main shaft on an angle position sensor. The machine control has a memory in which the angular position of the control position is stored and stops the shaft at this position.

In a step 4, the operator is notified that the warp knitting machine has been stopped in the control position. Optionally, an instruction to the operator may be issued here that they must now check the position of the guide needles relative to the knitting needles. The operator can turn in this step 4 after checking again give a start signal. In a step 5, the main shaft is rotated under the control of the machine control so far that it is in a clamping position. Drive to this the guide needles a consideration, ie they drive past the knitting needles at one or more streets between the knitting needles. Then the guide needle moves back into the needle lane between the knitting needles and must stop in the middle. More precisely, the catching space of the knitting needle must match the hole of the laying needle. This designation is called "center hole".

In a step 6, the engine controller indicates that the cocking position has been reached and, if necessary, issues an instruction to the operator to pull the yarns taut. In addition, the machine controller now changes to an input-mode, i. It waits for an input, which takes place in a step 7.

In step 7, the operator has the choice between a few inputs. In the simplest case, it can choose between two inputs. A first input is to repeat step 5. This input is simply called "stitching command". Another input is to turn on a tree drive.

The type of input is queried in a query 8. If a stitching command has been input, steps 5-7 are repeated. When a tree start command has been entered, the tree drive is now turned on. In general, you will repeat steps 5-7. Each time the warp knitting machine stops in the cocking position, the threads are tightened by hand.

Steps 5-7 are repeated until all stitches have been formed over the working width of the warp knitting machine. This can be visually controlled by the operator. If necessary, correction work is required, for example, the retraction of individual threads or the ordering of individual threads.

When the tree start command has been input, in a step 9, the tree drive is turned on. Here you can enter thread run-in values that have been previously estimated or calculated or are available from product specifications. The knitted fabric is worked on with short machine starts and, if necessary, the thread inlets are corrected.

In this case, the stitches can be worked "on block", i. the stitches are close together. This is possible if at this stage of incorporation a fabric removal is not yet done.

In a step 10, the warp knitting machine is stopped. The threads or knitted fabric already created is brought into engagement with the fabric take-off and the fabric take-off is switched on. In a step 11, the production can now be started and the resulting knitted fabric checked, so that in a step 12, the incorporation process is completed.

As mentioned above, the machine controller has a memory device in which angular positions of the main shaft associated with the above-described correction position and the above-described clamping position are stored. Thus, the machine control is able to stop the main shaft at relatively well-defined positions, without requiring the experience of an operator.

These positions can be specified by the manufacturer of the warp knitting machine. Incidentally, the positions can differ from knitwear to knitwear, which can already be taken into account when entering the corresponding angular positions.

In addition, it is possible to change the values of the angular positions in the memory.

For example, if the operator determines that the guide needles are not optimally positioned in the cocking position, then he may turn the main shaft back or forth, for example in small increments, until the guide needles are optimally positioned with respect to the knitting needles. It can then trigger a save operation. At the next incorporation, the machine control will then use the changed or corrected angular positions.

Claims (9)

1. Method for training a warp knitting machine having guide needles, knitting needles and needle spaces between the knitting needles in which guide needles with drawn-in threads are moved relative to knitting needles to tensioning positions in which a hole of the guide needles coincides with a tuck space of the knitting needles and stopped there and the threads are tautened there, characterized in that the movement of the guide needles into the tensioning position, which movement includes travelling of the guide needles through the needles spaces and an overlap, is controlled by a machine controller of the warp knitting machine.
2. Method according to Claim 1, characterized in that the machine controller displays the attainment of the tensioning position and changes into an input wait mode.
3. Method according to Claim 2, characterized in that the machine controller in the input wait mode only allows a predetermined type of inputs by a user.
4. Method according to Claim 3, characterized in that the machine controller in the input wait mode allows a stitch forming command and an axis switch-on command.
5. Method according to one of claims 1 to 4, characterized in that before movement into the tensioning position by the machine controller the guide needles are moved into a monitoring position and held there, wherein the monitoring position is a position of the guide needles shortly before they travel through needle spaces between the knitting needles.
6. Method according to one of claims 1 to 5, characterized in that the tensioning position is corrected manually and the machine controller stores the corrected tensioning position.
7. Warp knitting machine having at least one guide bar having needles, at least one knitting needle bar having knitting needles and needle spaces between the knitting needles, at least one main shaft which moves the guide bar and the knitting needle bar relative to one another, a motor which drives the main shaft and a machine controller which controls the motor, characterized in that the machine controller has a storage device in which an angular position of the main shaft is stored which is assigned to a tensioning position in which a hole of the guide needles coincides with a tuck space of the knitting needles and the machine controller holds the main shaft in the angular position during training of the warp knitting machine after travelling of the guide needles through the needle space and an overlap.
8. Warp knitting machine according to Claim 7, characterized in that the machine controller is connected to a display device and an input device, wherein the machine controller with the display device displays the attainment of the tensioning position.
9. Warp knitting machine according to Claim 8, characterized in that the machine controller is connected to a beam drive.

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