SU1237450A1 - Device for cutting polymeric materials - Google Patents

Description

The invention relates to the processing of materials by cutting with circular knives and can be used in the coal, chemical and other industries of the industry that use conveyor belts with rubber ropes for their cross-cutting.

The aim of the invention is to improve the reliability and efficiency of the device when cutting rubber cables.

Figure 1 shows the proposed device, a General view; figure 2 - section aa in figure 1; on fig.Z - view B in figure 2.

The device includes a housing 1, a drive mechanism and a cutting part. The cutting part is made in the form of two tools: the upper 2 and lower 3. The upper knife 2 is a disk, along the external contour of which there are a row of teeth 4, divided by an annular groove. The lower tool 3, loosely mounted on the support, consists of two truncated cones made of disks, which are bolted together. With such a connection, a U-shaped 5 is formed around the perimeter of the knife (FIG. 2), in which the cutting part of the upper disk knife 2, which is the leading part, is placed.

In order to push the cut-out tape out of the groove, the device is provided with a scraper 6, one end of which is fixed to the body 1, and the other (its top) enters the knife notch 3.

0

The drive mechanism consists of a screw 7, a worm gear 8 and a handle (not shown) for rotating the screw.

The radius of the teeth of the upper knife is equal to or less than the radius of the cable being cut, and the front sides of this knife are made with a bevel of the tooth head equal to 10-15 ° for smooth entry of the knife 2 into the groove of the lower tool.

The device works as follows.

When the drive mechanism rotates, the tooth 4 of the upper knife 2 cuts into the tape 9. Moving, the tooth moves the cable with which the tape is reinforced into the cavity between the teeth and simultaneously feeds to the cutting zone 5. As the cutting edges of the lower circular knives 3 and the cutting edges of the depressions of the teeth of the upper knife 2 move, the cable is cut. Since the cutting process is carried out in two parallel planes, a strip is cut, equal to the width of the groove between the lower circular blades, which is removed by means of a scraper 6 mounted on the housing 1.

The invention provides increased reliability and efficiency of the device when cutting rubber cable ribbons due to the presence of two parallel cutting edges on the upper and lower blades, providing a wide cut that eliminates the clamping of scissors between the cut parts of the tape, without overheating and brushing the tools.

0

five

vidd

fig.Z

Claims (1)

DEVICE FOR CUTTING POLYMERIC MATERIALS, comprising an upper circular knife mounted in a housing with a cutting part on the periphery and a lower cutting tool mounted in the form of two circular knives, wherein the cutting part of the upper circular knife is located between the latter, characterized in that, in order to increase reliability and efficiency of the device when cutting rubber bands, the upper circular knife is made with an annular groove located in the middle of its cutting part, made of gear. FIG. 1 1237 450 A1