SU958122A2 - Apparatus for cutting polymeric web material - Google Patents

Description

(5) DEVICE FOR CUTTING STRIP POLYMER MATERIAL

The invention relates to devices for grinding strip polymeric materials, for example, rubber, and can be used in chemical and engineering industries and can be worn. According to the main author. St. If 323286 a device is known that is used for cutting a strip of polymeric mat.herial consisting of a roller with circular knives and a pressure roller with annular cuts under the blades of circular knives for slitting the material, a knife drum with spiral knives, interacting with a support bar, made with a bevel on the entrance side of the cutting edges of the drum knives, spring-mounted mounted in the guides movably, for cross-cutting material Cl 1. The disadvantage of this device is that the cutting edges of the drum knives for providing smooth entry into contact with the supporting bar are arranged at a steep angle to the support bar, so cutting gives greater lateral force component tending to push the material to be ground with the support bar to the side. This reduces the reliability of the device as a whole. The purpose of the invention is to increase the reliability of the device. The goal is achieved by the fact that the front edges of the drum knives are made with a step located on the side of the bevel of the support bar, the width of the step being not less than the bevel of the supporting bar. FIG. 1 shows the proposed device, a general view; in fig. 2 view A in FIG. one; in fig. 3 - view of the knife drum from the entrance to contact with the support bar; in fig. C - section BB in FIG. 3; in fig. S is the view of B in FIG. 3

A device for cutting a strip of polymeric material contains a roller 1 with circular knives 2, a pressure roller 3 with annular slits under the blades of circular knives 2 for longitudinal cutting of material, a knife drum 5 with screw knives 6 interacting with a support bar 7 in the process of cross-cutting material 8. Screw knives 6 are made with a junction, with stage 9 with a steep helix angle located on the side of the bevel d of the support bar and made in width 6 not less than the length of the bevel of the support bar. Step 9 of the blades 6 can be positioned obliquely (Fig. 2) or perpendicularly (Fig. 3) to the cutting edge of the support bar 7, while the support bar 7 can be without bevel, and step 9 should be of variable thickness, gradually increasing towards cutting edge 10 In addition, there must be a guaranteed gap between the support bar 7 and the drum 5 frame (b.

The support bar 7 is spring-loaded by the spring 11 and mounted in the guides 12 movably with a possibility of displacement in the horizontal plane to the cutting edges of the knives 10 of the drum 6 5. The screw 13 serves to adjust the pressing force of the support bar 7 to the cutting edges 10 of the knives 6 during the adjustment process . The support bar 7 is made with a cavity And, hermetically connected by fittings 15 and 16 with the main coolant.

The device works as follows.

The strip rubber 8 is fed by the feed conveyor 17 to the rolls 1 and 3 for the length of the slitting. The material then flows to the cutter drum 5 for cross-cutting. Cut cubes 18 of rubber 8 are taken to a storage bin (not shown). Thus, the continuous operation of the device is carried out.

The use of this design will significantly improve the reliability of operation due to the fact that with this design of the drum knives, the knives come in smooth and safe entry into contact with the support bar and almost perpendicular to the transverse cutting, eliminating the material being pushed from the support bar to the side.

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Claims (1)

1. USSR author's certificate No. 323286, cl. In 29 N 3/06, 1969 (prototype). Phi.1