SU885261A1 - Device for stretching straightening leather tissue of hide - Google Patents

Description

The invention relates to fur peroxidation, namely, a device with tvas for stretching the leather of the skins. A known passing marking machine for hides and skins, containing a base in the form of a table for laying skins or skins, a stretching mechanism (tambourine) in the form of two rotors with cutter heads for processing the two halves of SKU1YL and one knife head for processing the spinal part 1. A disadvantage of the known machine is a small stretching effect, since the narrow strip of the spinal portion of the skin is additionally processed with a separate knife head at the bend site, and the rest is processed with an intensity limited by the strength of the skin. The periphery of the skin. It is also known a device for stretching leathers, fur skins and similar products, comprising a table, a frame with a mesh on which the skin is placed, means / for stretching clamps fastened with cables, some of which are acting on one side. the skins are fixedly connected to the frame, and the part of the cables acting on the other side of the skins is thrown over the blocks and secured by tension on the tapered shaft driven by the handle 2. A disadvantage of the known device is that it does not provide high-quality stretching due to the fact that ITO grips are attached to the edges of the skins and the stretching efficiency is limited by the strength of the peripheral sections of the skins. In this connection, this device has no practical application in industry. It is also known to have a device for stretching leather to a drying unit, comprising a base in the form of a trolley, stand, means for placing the skin in a perforated drum, means for fixing the skin in the form of clamps , fastened on the drum, means for stretching the skin in the form of pivotally connected below with the possibility of extending two semi-drums, constituting a perforated drum, equipped with a spring, a ratchet mechanism with an eccentric, drive the stretching unit in the form of an electric motor with a gearbox and a belt drive, and means for controlling the stretching in the form of a handle / connecting shaft of the drum to the drive shaft, and also containing a device for controlling stretching in the form of a gauge, ruler and pointer fixed on the slats half drums f3j A disadvantage of the known device is that it does not provide good quality stretching of the lateral and spinal sections and the achievement of a larger increase in the processed material in the area due to the fact that Stretches act on the skin in one direction and because of this stretching is performed unevenly, and also due to the fact that the clamps are attached to the edges of the leather fabric and the stretching forces will depend on the strength of the peripheral areas.

The purpose of the invention is to improve the uniformity of multi-axial stretching of the spinal and lateral sections.

This goal is achieved due to the fact that the base is made in the form of a table mounted on racks, the stretching means consists of an elastic rubber web attached to the table, and a compressed air supply system under the rubber web, the means for fixing the skin has a hollow cylinder of oval cross section; and a hydraulic actuator. Mounted on racks, and a device for controlling stretching contains a sensor, made in the form of a spring-loaded limiter disk, installed in the center of the pressing above the rubber sheet, and kinematically connected with the compressed air supply system. The means for controlling the stretching is made in the form of a time relay electrically connected with the compressed air delivery system.

Fig, 1 pok-azano device, front view; figure 2 is a section of the LA in figure 1; FIG. 3 shows a clamping assembly; Fig. 4 is a schematic of the device in a stretched-skin position.

The device comprises racks 1, table 2, covered with rubber cloth 3 attached to the table on two opposite sides by bolts 4. On top bracket 5 of racks 1, a clamp 6 is connected in the form of two hydraulic cylinders 7 connected to a high-pressure main, which is powered by a hydraulic station mounted on the bracket 8 and consists of an electric motor 9, a pump 10, an oil tank 1, a safety valve and an electrohydraulic distributor (not shown}.

The clamp 6 is made in the form of a hollow cylinder oval cross-section.

Through the bearings 12 and 13, mounted on the bracket 5 and the clamp b, passes the rod 14, on the upper end of which a cam 15 is fixed, acting on the lever of the pneumatic valve 16, also mounted on the bracket 5. The limiting disk 17, with the sleeve 18, having internal thread mounted on the thread of the lower end of the rod 14, secured with a locknut 19.

Spring 20, covering the bar. 14, rests on the ends of the bearing to 13 and the sleeve 18..

In the threaded hole in the center of the table 2 screw fitting 21, connected to the air line through pneumatic valve 16.

5 The means for controlling the device contains two start-up push buttons 22 attached to table 2 and electrical control and protection devices of the device placed in cabinet 23, 0 where an adjustable time relay (not shown) is also installed, counting down the pressure hardened skin 24.

In the bars x25 (fig.Z attached to the upper part of the clamp 16, the sockets 26 are made, in which the hemispherical heads 27 of the rods 28 of the hydraulic cylinders are placed, fixed with the help of bolts by plates 29 having cutouts in the form of semicircles covering the cylindrical necks of the rods 28.

The device works as follows. .

A button located on the cabinet 23, 5 starts the electric motor of the hydraulic station.

The skin 24 is placed on the table 2. When the palm buttons 22 are turned on, the electro-hydraulic distribution is turned on, pressure is applied to the hydraulic cylinders 7, the presser 6 is lowered, pressing the skin to the table 2 through the rubber sheet 3, together with the presser 6 the bar 14 and the cam 15 are lowered. e is pneumatic 16, Compressed air enters through the nozzle 21 under the rubber sheet 3, raising it together with the skin 24. In this case, the limiter disk 17 is raised with the skin along with the rod 14, compressing the spring 20, the cam 15 releases the pneumatic lever, the valve 16, the air supply under the web ceases.

The stretched skin remains under pressure for a time determined by a shutter speed, a time delay set, which, after holding, gives a command to lift the presser 6, which is set to its original position, the compressed air instantly goes out from the loose sides of the web. The treated hide is removed, the next hide is laid on the table and the cycle is repeated.

Claims (3)

The npk processing of batches of skins of various sizes is set to the appropriate size. In order to change the clamp 7, the plates 29 of the plates 29 are disconnected, releasing the rod 27 of the rods 28. The press is installed in the reverse order. When processing batches of skins that have different density and thickness of the leather: ::: yew cloth, the installation height of the disc 17 is adjusted, for which it and the sleeve 18 are moved along the thread on the rod 14, secured in the desired position by a lock nut 19, and also change the shutter speed on the time relay. The use of the proposed device improves the uniformity of the multifaceted stretching of the spinal and lateral sections of the skins, and allows for an increase in the area of the skins. The skins treated with the proposed device become more uniform in both leather and hair. Claim 1. Device for stretching - skins of leather fabric of skins, containing base, racks, means for stretching the skin, means for fixed skins, means for controlling the stretch, device for controlling the stretch, different     lA / m S i g 2 / in order to increase the uniformity of the multi-axial stretching of the spinal and lateral sections, the base is made in the form of a table mounted on racks, the stretching means consists of an elastic rubber cloth attached to the table, and a compressed air supply system under rubber the cloth, the means for fixing the skin has a clamp made in the form of a hollow cylinder of oval cross section, and a hydraulic actuator mounted on racks, and the device for controlling the stretch contains a sensor made in the form of a spring This disk is mounted on the center of the clamp above the rubber sheet and kinematically connected with the compressed air supply system. 2. A device according to Claim 1, characterized in that the means for controlling the stretching is made in the form of a time relay electrically connected with the compressed air supply system. Sources of information taken into account during the examination 1. USSR author's certificate No. 74207, cl. From 14 to 1/26, 1947.. 2. USSR author's certificate No. 282590, cl. From 14 to 1/40, 1970. 3. Authors certificate of the USSR. 152935, cl. C 14 1/26, 1963 (prototype).