SU1479299A1 - Injection mould for making polymeric articles - Google Patents

Abstract

The invention relates to the field of processing materials into products and is intended for pressing products, in particular, from polymer composite materials. The purpose of the invention is to improve the quality of the products by maintaining the pressure during the cooling of the mold. For this purpose, on the matrix 1, folding supports 6 are hingedly mounted with the possibility of the free ends interacting with the punch 4. In the matrix 1 there are grooves 7 in which elastic liners 8 are placed. forming element 5. On the punch 4, protrusions 9 are made to act on the elastic liners 8. When the mold is cooled, the inserts 8 and the element 5 decrease in volume, and the punch 1 by means of elastic elements 3 is lowered, which allows to maintain a constant pressure on the product 10. 1 Il.

Description

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a barrel of elasticity greater than the elastic modulus of the material of the forming element 5.

The mold works as follows., With

On the forming element 2, the product blank package 10 is assembled and it is placed in the matrix 1. Then the punch 4 is lowered to the stops 6 and clamped to the matrix with the help of bolts 2 through the elastic elements 3, and the force generated by the elastic elements 3 is perceived by the stops 6. The assembled mold is placed in a thermostat and heated to the molding temperature. During heating, the volume of the molding element 2 increases and pressure builds up in the molding cavity of the mold. At the same time, the volume of inserts 8 increases,

When a given pressure is created in the mold, the force exerted on the metal punch 4 created by the molding element 5 and the liners 8 becomes 45

50

This is due to pressure, and therefore prevents the products from warping, cracking and delaminating.

Claims (1)

Invention Formula A mold for the manufacture of products from polymeric materials, containing a metal matrix, connected with it through elastic elements, a punch and an elastic forming element, characterized in that, in order to improve the quality of products by maintaining pressure during cooling of the press mold. we, it is equipped with folding stops hinged on the matrix with the possibility of the free ends interacting with the punch, elastic inserts and protrusions made on the punch for interacting with the elastic inserts kladyshi made of a material having a large volumetric mos force .uprugih epementov 3. dulem elasticity greater than that Matheny plastic occurs under pressure, and therefore, the possibility is prevented buckling, cracking and delamination of products. 0 five 0 Invention Formula A mold for the manufacture of products from polymeric materials containing a metal matrix, connected with it through elastic elements, a punch and an elastic forming element, characterized in that, in order to improve the quality of products by maintaining pressure during the cooling of the press mold. it is equipped with folding stops hinged on the matrix with the possibility of the free ends interacting with the punch, elastic inserts and protrusions made on the punch for interacting with the elastic inserts, and kladyshi made of a material with a volumetric mo