DE1760839B1 - Method for closing the tips of socks on a circular knitting machine and circular knitting machine for carrying out the process - Google Patents

Description

can be pulled, arranged, controllable retaining 25 rotatable needle cylinder and a plate washer

Device with goods grippers, characterized in that the retaining device (10) is stationary and the needle cylinder (1) is rotatably arranged or reversed and that the retaining device (10) heating parts (28, 29) are assigned.

3. Circular knitting machine according to claim 2, characterized in that the heating parts have an electrically heatable heating element (28) arranged in the middle of the needle cylinder (1), against which the rotated part
the goods come into contact.

(33)

The invention relates to a method for refining. In the drawings shows

F i g. 1 shows a vertical partial section of the needle cylinder of the circular knitting machine with associated knitting elements as well as the parts for gripping the twisted tip part of the hosiery and for closing it the stocking point,

F i g. 2 a part in plan view of a goods gripper,

F i g. 3 shows a part in plan view of a goods gripper with a built-in heating element,

F i g. 4 a device for actuating the goods gripper and

F i g. 5 in a broken representation, the tip part of a stocking after it has been closed Top.

According to FIG. 1, the circular knitting machine shown comprises a rotatable needle cylinder 1 with latch needles 2, a lock system 3, inclusion plates 4, a tee plate lock system 5, a part

ßen the tip of stockings on a circular knitting disk 6 and a fixed fabric take-off pipe 7 machine by twisting a tubular as part of a conventional pneumatic or suction

Hosiery in the lace part, which contains thermoplastic threads, and a circular knitting machine for Perform this procedure.

Such a known method (US Pat. No. 3,327,500) already solves that of the invention underlying task of closing the tip part of a stocking on the circular knitting machine self; Here, however, the stocking tip is closed by twisting a kind of double edge.

In contrast, the same object is now achieved according to the invention in that the first the tip part which is still open is twisted in that a relative rotation between the still on the needles located goods and the goods themselves by holding them is generated, whereupon this rotated Part of the goods by contact with a generally coaxially arranged to the tubular hosiery Heating element is brought to such a temperature that the thermoplastic threads to close the top of the goods are fused together in a manner known per se.

This method according to the invention results in the train by which the goods are removed from the needles 2 is peeled off while knitting. In Fig. 1 are different procedural stages for training of the tip closure shown, in which once the goods by dash-dotted lines 8 and on the other hand is indicated by dashed lines 9.

In the case of the in FIG. The arrangement shown in FIG. 1 is a holding device with a number of grippers 10 shown, which on a concentric to the needle cylinder 1 arranged cylindrical support in the form a sleeve 11 are pivotably mounted. There can be two grippers 10 diametrically opposite one another be provided on the carrier 11 or more than two at equal angular intervals around this carrier 11 hereabouts. From Fig. 1 only one gripper 10 can be seen. In the illustrated embodiment, the cylindrical Carrier 11 is guided for sliding up and down movement on the goods take-off pipe 7. It is each gripper 10 vertically inside the needle cylinder 1 on a pivot pin 12 at the lower end of the gripper 10 so arranged that the grippers 10

can perform a pivoting movement in which the gripper jaws 13 in and out of the goods take-off pipe 7, which is provided with corresponding openings 14 for this purpose. On the inside wall of the needle cylinder 1, a cam ring 15 is arranged. The carrier 11 is conventional Connected control device, which according to F i g. 4 an angle lever 16 pivotably mounted at 17, one Connecting rod 18, an angle lever 19, which at

20 is pivotably mounted, and a control drum

21 which can be the main control drum of the machine. The carrier 11 is with a collar

22, which serves to receive a roller 23. The angle lever 19 carries a thumb 24 on which a cam element 25 of the main control drum 21 can act. Therefore, when the angle lever 19 is pivoted by a control cam 25, the carrier 11 is pulled down, so that the cam ring 15 acts on the gripper 10, whereby the gripper jaws 13 are closed against the goods 26 within the goods take-off pipe 7, ^ao like it is shown with dash-dotted lines. On the shaft of each gripper 10, an angled part 27 adapted to the inclination of the cam ring 15 is provided. During the reverse movement of the control device, the carrier 11 is raised so that the grippers 10 are released from the cam ring 15, whereupon the grippers 10 open either automatically or under the action of springs or additional weights. The control device on the carrier 11 can also be loaded in a similar manner in order to support the reverse movement. The holding device described above is separate from the heating device to be described below, the latter consisting of an electrically heatable heating element 28 which is arranged in an insulated housing in the cup washer 6 so that it extends into the needle cylinder 1. Furthermore, a switch 29 is provided, through which the heatable heating element 28 is connected to a low-voltage circuit 30, which is supplied with power from a suitable power source, as well as an auxiliary control drum 31 with a control cam 32 for acting on the switch 29 in a timed relation to the control the gripper 10. If desired, the auxiliary control drum 31 can also be omitted and the control cam 32 can be provided on the main control drum 21.

With this arrangement of the components, when the grippers 10 are closed on the goods 26, rotates the goods 26 at 33 as a result of the normal rotation of the goods 26 held by the grippers 10, until it comes into contact with the heatable heating element 28, as indicated by the dash-dotted line Lines 8 is shown. By closing the switch 29 under control of the control cam 32, the heatable heating element 28 is immediately heated to the required degree of heat, so that the thermoplastic threads in the twisted goods 33 at 34 for closing the tip 37 of the goods 26 or whose open tip part is melted.

In a further embodiment, the holding device and the heatable heating element also be united with each other, with z. B. a protected filament 35 useful in each Gripper jaw 13 is embedded (F i g. 3), after detecting the rotating goods 26 their rotated To grasp part 33 from the outside and, as mentioned above, to close at the tip 37.

In any case, after the tip has been closed, the pull-off device pulls the finished stocking down out of the needle cylinder 1. The goods 26 remaining on the needles 2 is in the blasted off in the usual way.

F i g. Fig. 5 shows the tip portion 36 of the fabric 26 with the fused tip 37 and that for fusing provided courses 38 with thermoplastic threads. If desired, can be used to reduce the mass of the goods at their tip part the arrangement can also be made so that the The number of wales is reduced, e.g. by a needle selection device, to move from one another to put spaced needles out of action while knitting the point.

1 sheet of drawings

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Claims (2)

Claims: Advantage not only of a much simpler and faster operation than before, but also of a much smaller accumulation of material at the closed tip, since only one layer of the knitted goods needs to be used for the closing process. To carry out this process, a circular knitting machine is used with one inside the needle cylinder through which the tubular fabric 1. Method of closing the top of stockings on a circular knitting machine Twisting of a tubular hosiery in the tip part, which thermoplastic threads contains, characterized in that the initially still open tip part (36) thereby is rotated that a relative rotation between io can be deducted during the knitting process, angeordder Goods still on the needles and neten, controllable retaining device with goods tender Goods themselves generated by holding them used grippers, which is characterized by whereupon this rotated part (33) of the goods that the retaining device is stationary and the needle through Contact with a generally equidistant cylinder is arranged to be rotatable or vice versa and sig to the tubular hosiery arranged heating element (28) on such Temperature is brought that the thermoplastic threads to close the tip (37) of the Goods are fused together in a manner known per se. 20th 2. Circular knitting machine for performing the method according to claim 1 with an inside of the needle cylinder through which the tubular fabric drained during the knitting process the retaining device are assigned heating parts. Advantageously show according to another The feature of the invention is that these heating parts are electrically located in the middle of the needle cylinder heatable element against which the rotated part of the goods comes into contact. The invention is illustrated below with reference to schematic drawings for, for example, embodiments applied to a circular knitting machine for making seamless hosiery with a