SU1401081A1 - Device for stapling chemical fibre tow - Google Patents

Description

1

This invention relates to a textile industry and relates to a device for stapling a tow of chemical threads on a tape breaking machine.

The object of the invention is to improve the quality of the stapled tape by reducing its unevenness in structure and linear density. Q

FIG. 1 shows a general scheme of the device, top view; in fig. 2 - the same, front view; Figs. 3 and 4 show embodiments of the staple shaft; in fig. 5 and 6 - options for the implementation of the shaft teeth; in fig. 7 shows an embodiment of the device.

The device contains a feed 1 and exhaust 2 pairs of rollers, between which the staple shaft 3j is placed parallel to them 3j having radially spaced teeth 4 on the cylindrical surface with cutting edges 5 on the sides. Shaft 3 is mounted above or under the trajectory of movement of the tow 25 of 6 chemical filaments with the possibility of inserting the shaft teeth into the tow.

The tooth 4 is placed on the staple shaft with annular rows and with the latter positioning along the shaft at a distance of 30 ° A from one another (Fig. 3). The tooth may be arranged in a circular pattern (Fig. 4).

The shaft 3 has a drive of rotational motion and a drive of axial reciprocating, - translational movement.

Each tooth 4 may have a triangular shape (Fig. 5) or only a triangular top (Fig. 6). The height h of the tooth is 5-8 mm. 40

Alternatively, the device may additionally have a staple cutting shaft 7 with teeth similar to shaft 3. (FIG. 7). Both shafts are mounted dz one above the other on opposite sides of the trajectory of movement of the tow and with the possibility of counter-reciprocating movement and placement of the teeth of one shaft between the teeth of the second shaft.

The device operates as follows.

Harness 6 is fed to the stapling zone of the feed pair 1. The harness threads go at the speed of the feed pair of cylinders until their front ends reach the clamp of the exhaust pair 2, after which the threads begin to stretch between pairs 1 and 2.

When rotating the staple shaft 3, its teeth 4 enter the inside of the bundle and divide it into threads 8 (groups) of filaments located in the spaces between the rows of teeth (Fig. 3). Since the staple shaft has a reciprocating motion along its axis, the extreme threads of the threads are subjected to transverse action from the teeth, and at that moment, KO, these threads will be stretched quite strongly between pairs 1 and 2, they are successively cut by the sharp cutting edges of the teeth . The threads of the central layers of the flow, which are not in contact with the teeth, are broken up into fibers of different lengths as a result of stretching between pairs 1 and 2. The torn and cut fibers form, at the outlet of the clamp, a pair of stapled tape.

The presence of two staple rolls in the embodiment of the device of FIG. 7), having a counter-reciprocating movement, increases the transverse action of the teeth on the threads being stretched and thereby increases the likelihood of cutting the threads with beats and the fraction of the cut threads.

Placing a series of teeth on each shaft at a distance from one another allows, during its axial reciprocating movement, to eliminate compression of the thread of threads on its both sides and to cut the threads by cutting edges of the teeth successively as they are stretched by pairs of rollers, as a result, group cutting of threads is eliminated, which, in turn, allows reducing the unevenness of the stapled tape obtained from the fibers according to linear density and eliminating the periodic structure change and linear th density of the tape along its length.

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Claims (2)

1. DEVICE FOR STAPLING A CHEMICAL THREAD HARNESS; a set of shaft teeth, characterized in that, in order to improve the quality of the staple tape by reducing its unevenness in structure and linear density, the teeth are placed us to staple ruyuschem shaft annular rows and the last races position along the shaft at a distance from one another, with a cutting drive shaft has axial reciprocating remescheniya ne. . 2. The device according to p. ^ Characterized in that it additionally has a staple shaft with teeth, while the shafts are mounted one above the other on opposite sides of the trajectory of the bundle of chemical threads and with the possibility of oncoming reciprocating movement and placement of the teeth of one shaft between the teeth of another shaft.