SU1248827A1 - Apparatus for punching-out elastic material - Google Patents

Description

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 The invention is intended for and; prepared shaped blanks of elastic material, namely for cutting blanks from sheet rubber, leather and fabric, and can be used in factories of rubber products, footwear and sewing factories.

The purpose of the invention is to ensure durability and reliability in the operation of the device.

FIG. 1 shows a diagram of a device for cutting out an elastic material; FIG. 2 shows a backing rubber plate, a general view; in fig. 3 is a sectional view in FIG. 2; Fig, 4 - metal reinforcement element.

The device for cutting out an elastic material contains a cutting press 1 with a pressure table 2, a punching knife 3 with cutting edges corresponding in configuration to a cut blanks of sheet material 5, an inlay rubber plate 4, made of electrically conductive rubber, a work table 5 on which the backing plate 4 with the sheet material to be cut and the means b for stopping the pressure table at the moment of cutting completion due to the closing of the electric circuit (only the contacts on the table 2 and the plate are shown in Fig. 1).

The rubber rubber base 4 (Fig. 2) consists of one gosh of two layers 7 and 8 of electrically conductive rubber, in which a metal strip 9 of a wavy spiral-shaped profile of a soft, electrically conductive metal with good adhesion to rubber, for example, is pressed made of brass, connected by conductors 10 to electrode 11, which is part of the electrical circuit of means 6 for stopping pressure table 2, on the strip 9 (figs. 3 and 4) along its upper edge. grooves 12 are made to leak rubber of the upper layer 7 and to form bridges holding her in Loe re248827 - I

grabs at a given level, in which the upper edge of the strip is aligned with the upper surface of the plate. Device for cutting elastic material works as follows.

The material to be cut 13 (Fig. 1) is placed on a rubber backing plate 4 placed on the working stand 10 le 5 of the punching press. In this case, the electrical circuit of the device for stopping the pressure table 2 is open. Then, under the action of a force from a hydraulic cylinder or other force mechanism (not shown) of the cutting press 1, the table below is lowered, interacting with the dance knife 3, transferring to it the force. The knife 3 with its cutter 1 cuts the edges with its edges.

The rolled material 13 before contact with the surface of the plate 4 and with the upper edge of the metal strip 9 embedded in the rubber layers 7 and 8 of the plate 4 is flush with its working surface 25. Due to the contact of the edges of the knife 3 and the metal strip 9, an electrical circuit is closed and a pulse is given for the command to stop and return the movable table with the knife to its original position.

3Q position. The blank is removed and a new sheet is laid in its place. Thanks to the fact that the metal strip 9 is made of a soft material, contact with the blade of the knife 3 does not occur, it is blunt. The wave-shaped shape of the metal strip and its laying in a spiral provide a strong bond with the rubber mass of the plate 4 and ensure contact with the knife during the material cutting.

Tuning the casing of an electrically conductive rubber backing plate increases the effectiveness and reliability of the means for stopping the pressure table at the time of cutting, as this ensures the electrical contact of the knife over the entire surface of the backing plate.

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FIG.

Editor A. Kozoriz

Order A175 / 15

Circulation 640 Subscription

VNISHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Compiled by E. Fetisov.

Tehred V. KadarKorrektor L.Pilipenko

Claims (2)

- 1. DEVICE FOR CUTTING ELASTIC MATERIAL, containing a pressure table with a die cutter <? M fixed in it, a rubber backing plate with a working surface and metal reinforcement, characterized in that, in order to ensure its durability and reliability, the metal reinforcement is made in the form of a plate of a spiral shape and fixed in the body of a lining rubber plate flush with it. work surface. 2. The device according to claim 1, characterized in that the rubber for the backing plate is $ 'electrically conductive.