SU1730295A1 - Device for cutting tube-like textile material - Google Patents

Abstract

SUMMARY OF THE INVENTION: The device comprises a guide cylinder, a drive shaft connected to a drive, a knife, a friction shaft and a shaft for winding the cut material. The feed, friction shafts and the shaft for winding the cut material are parallel, and the guide cylinder is at an angle to these shafts. The surfaces of the friction, feed shafts and cylinder contain friction material. The friction shaft is installed with the possibility of free rotation, with the lower part of the friction shaft protruding beyond the cut material and pressed due to the force connection with the support to the uncut material located on the feed shaft. After the feed and friction shafts, fork clamps protruding beyond the limits of the feed shaft and the guide cylinder are installed along the material. 1 hp f-ly, 4 ill.

Description

The invention relates to devices for cutting a tubular textile material, and more specifically to devices for spiral cutting of a tubular knitted fabric into a stripe.

A device for cutting a tubular textile material is known, which comprises a drive, one feed and two guide cylinders mounted at an angle to each other, the honor of the feed cylinder being made of a hard material to which the disk knives are pressed, and following them along the material being cut, installed shaft for winding the cut material.

In the known device, the winding up of the cut material occurs due to friction between the surface of the roll of the cut material and the surface of the feed cylinder, made of solid

the material, as well as this surface is polished, the friction is small, as a result, the roll may slip on the surface of the feed cylinder, which leads to a change in the width of the bake being cut, and a deterioration in the quality of the cut material.

The purpose of the invention is to improve the quality of the product.

FIG. 1 shows the proposed device; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a kinematic diagram of the device.

A device for cutting a tubular textile material comprises a portal frame on which drive 1 is mounted, a drive shaft 2 connected to the drive, an assembly of disk knives 3 adjacent to the shaft 2, a friction shaft 4 mounted for free rotation on the lever

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5, which is connected to the frame by a spring 6, a shaft 7 for winding the cut material, mounted for free rotation on the lever 8, which is connected to the frame by a spring 9. The guide cylinder 10 is mounted for free rotation on the axis 11, which, in the turn is mounted on the rotary axis 12. The axle 12 is mounted on the bracket 13 mounted on the driving screw 14 equipped with a handwheel 15. The axis 11 of the cylinder 10 is connected to the bracket 13 by a screw 16 equipped with the handwheel 17, on the axis 12 on the bracket 18 mounted fork 19, en A similar spreader 20 is installed in the direction of movement of the material after the feeding shaft 2. At the bottom of the frame there is a rotary table 21 connected to the drive 22. The feeding shaft 2 consists of two parts - the upper part, which adjoins the disk knives 3 made of solid material (for example, hardened steel ), and the bottom covered with friction material. The same friction material covers the guide cylinder 10 and the friction shaft 4.

The lower part of the friction shaft 4 projects beyond the limits of the material being cut, i.e. is below the lower circular knife in block 3.

The device works as follows.

The tubular knitted fabric folded by the book is placed on the turntable 21, its upper end is put on the feed shaft 2, the friction shaft 4 and tucked in zigzag fashion into fork spreads 19 and 20. Rotation of the handwheel 15 and, accordingly, the screw 14 moves the bracket 13 from The cylinder 10, which leads to the tension of the processed tubular web on the supply shaft 2 and the guide cylinder 10. Thereafter, the pipe angle of the guide cylinder 10 is established, and the size a (Fig. 2) is equal to Vertical, said web in the cutting zone. For this, by turning the handwheel 17, the screw 16 is turned, causing the axes 11 of the cylinder 10 to skew. Drives 1 and 22 turn on at the same time, as a result of which rotation of the supply shaft 2, the block of knives 3 adjacent to it, friction shaft 4, the shaft 7 for winding pressed against the friction shaft 4, the guide cylinder 10 and the turntable 21.

Due to the skewing of the cylinder 10, the tubular web begins to move along

helix up with step a. This is facilitated by the friction coating of the shaft 2 and the cylinder 10. The rotating table 21 prevents the tubular web from twisting. The lifting web passes between the feed shaft 2 and the friction shaft 4 and rises further into the cutting zone to the disk knives block 3. After a stripe of a small length is cut, about 0.5 m (3 bays with 3 knives) the device stops, the ends of the taps envelope around the friction shaft 4 and are threaded onto the shaft 7 to wind the material being cut. The device is turned on again and the cutting process begins until the coils of the required diameter are formed.

At the lower section of the feed shaft 2, the sheet, when it descends, forms a fold, which is fixed on the friction surface of the guide cylinder 10 and creeps further up into the cutting zone, causing rejects (misalignment of the gauge). The same thing happens when the blade descends from the lower slice of the guide cylinder 10.

To prevent this effect, forked spreaders 19 and 20, mounted behind the shaft 2 and the cylinder 10, are used along the web, the length of which exceeds the length of the shaft 2 and the cylinder 10, i.e. the lower ends of the straighteners 19 and 20 are below the lower sections of the shaft 2 and the cylinder 10.

Due to the fact that the friction shaft 4 is pressed against the web moved by the feed shaft 2, it receives rotation from the uncut web, and regardless of not only the manufacturing accuracy, but even its diameter, its circumferential linear velocity is equal to the circumferential linear velocity of the feed shaft 2, as a result, the possibility of changing the tension of the cut-off bake is eliminated. The roll of bake pressed against the friction surface of the shaft 4. is wound without slipping.

The proposed device allows to increase the reliability of work when cutting textile material and to improve the quality of the final product by eliminating slack when winding textile material.

Claims (2)

Claim 1. A device for cutting a tubular textile material, comprising a guide cylinder, a drive shaft, a disk cutter and a shaft for winding the cut material connected to a drive, characterized in that, in order to improve the quality of the product obtained, it additionally contains a friction a shaft mounted for free rotation and contact with the shaft for winding the cut material and the feed shaft. 2. Device pop. 1, characterized in that it contains fork spreads of the material. /five