RU2029679C1 - Press mold for making annular rubber articles - Google Patents

Abstract

FIELD: rubber article production. SUBSTANCE: press mold has mounting plates 1,2, molding plate and molding member with the annular molding seat 4 and cutting edges along its perimeter. The molding member is in the form of a set of concentrically arranged annular inserts 5-7. The cutting edges are provided on the inner 5 and on the outer 6 inserts. The molding seat 4 is arranged on the mean insert 7. The molding plate is in the form of a set of the concentrically arranged inner 11, mean 10 and outer 12 annular inserts, joined with the respective inserts of the molding member. The above mentioned mean inserts 10, 7 are fixed on the mounting plates 1 and 2; the inner inserts 11, 5 and the outer inserts 12, 6 are mounted with possibility of axial motion relative to the mounting plates 1, 2 by action of disc-type springs 13. EFFECT: enhanced quality of articles due to high accuracy of crop trimming. 1 cl, 1 dwg

Description

 The invention relates to a device for the manufacture of annular rubber technical products and is intended for the manufacture of flawless sealing rings, drive belts.

 A known mold for the manufacture of ring rubber products containing mounting plates, forming plate, plate springs and a forming element with an annular forming socket and cutting edges located along its perimeter.

 The disadvantage of the mold is the low quality of the manufactured products, since as a result of friction between the sharp cutting edges of the rotating forming element and the stationary lower forming plate, their cutting edges are quickly worn out, which does not ensure clipping of the flake after molding, and frequent replacement of forming elements is required.

 The purpose of the invention is to improve the quality of products by ensuring the frequency of trimming the flap after molding and by preventing the rapid wear of the cutting edges of the forming elements.

 The goal is achieved in that in a mold for the manufacture of ring rubber products containing mounting plates, a forming plate, plate springs and a forming element with an annular forming socket and cutting edges located along its perimeter, the forming element is made in the form of a set of concentrically arranged ring inserts, on the inner and outer of which the cutting edges are located, and on the middle - the forming nest, the forming plate is made in the form of a set of concentrically located inner, middle and outer annular inserts associated with respective inserts of the molding member, wherein the middle ear and the forming plate member fixedly mounted on the mounting plates, and their inner and outer liners are mounted for axial movement relative to the mounting plates under the action of Belleville springs.

 The drawing shows a mold in a closed position at the time of pressing rubber products, a cross section.

 The mold for the manufacture of annular rubber products contains the upper and lower mounting plates 1 and 2 with a guide column 3 of rectangular cross section to prevent the rotation of the mounting plates 1 and 2 relative to each other. On the bottom plate 2, a forming element is made with an annular forming socket 4. The forming element is made in the form of a set of concentrically arranged annular liners, on the inner 5 and outer 6, on which the cutting edges are located, and on the average 7, the forming socket 4. On the inner 5 and outer 6 liners made grooved grooves 8 and 9. The forming plate is made in the form of a set of concentrically arranged middle 10, inner 11 and outer 12 ring liners, paired with the respective liners of the forming element. The middle liners 10 and 7 of the forming plate and element are fixedly mounted on the mounting plates 1 and 2, and their inner 11 and 5 and the outer 12 and 6 liners are mounted with the possibility of axial movement relative to the mounting plates 1 and 2 under the influence of Belleville springs 13 located in the mounting the plate 1, mounted on the axis 14 and interconnected with the outer and inner annular liners 12 and 11. The mounting plates 1 and 2 are equipped with a lock 15, made in the form of a flat spring, fixedly mounted in the mounting plate 1, with a latch 10, interacting with the channel Avka 17, located in the lower mounting plate 2, in which there is a hole 18 under the column (not shown) of the disassembling device.

 The mold works as follows.

 Rubber (polymer material) is loaded into the lower mounting plate 2. The upper mounting plate 1 is lowered and the mold closes under the predetermined force of the locks 15. Then the mold is installed in the vulcanization press. The mounting plates 1 and 2 are centered on the rectangular sectional surfaces of column 3. At the same time, excess crude rubber filling the forming cavity 4 flows into the groove grooves 8 and 9, forcing air out of the forming socket 4.

 After the time required for the vulcanization of the rubber, the mold is advanced from the press and installed with holes 18 in the disassembling device. The columns of the disassembling device (not shown) pass through the holes 18 and press on the annular inserts 5 and 6 of the lower mounting plate 2, engage with the middle annular inserts 10, and the flap is trimmed, while the annular inserts 5 and 6 press on the inner and outer ring liners 11 and 12, which in turn press on the disk springs 13, ensuring the return of the ring liners to their original position after depressurization. Then, the disassembly of the mold is performed after opening the lock 15 to extract the finished product and burr.

 Then the cycle repeats.

 The proposed mold provides ring rubber products such as o-rings, used as drive belts, requiring accurate cross-section along the entire length due to high-quality cutting of the flake from the product after molding. The separation of the flash occurs by cutting according to the type of work of the scissors.

Claims (1)

 A PRESS FORM FOR PRODUCING RING RUBBER PRODUCTS, comprising mounting plates, a forming plate, disk springs and a forming element with an annular forming socket and cutting edges located along its perimeter, characterized in that the forming element is made in the form of a set of concentrically arranged annular liners, and the outer of which the cutting edges are located, and on the middle - the forming socket, the forming plate is made in the form of a set of concentrically located inner, middle and outer rings core inserts mating with respective inserts of the forming element, the middle inserts of the forming plate and the element being fixedly mounted on the mounting plates, and their inner and outer inserts are mounted with the possibility of axial movement relative to the mounting plates under the influence of Belleville springs.