SU1140997A1 - Mould for manufacturing polymeric material articles - Google Patents

Abstract

FORM FOR MANUFACTURING PRODUCTS FROM POLYMERIC MATERIALS, containing semi-matrices of polymeric materials with a sprue hole for filling the cavity with raw material, characterized in that, in order to simplify the design, semi-matrices are made of polymeric material with injected magnetic filler. ABOUT

Description

The invention relates to the processing of polymeric materials into products and can be used in the manufacture of removable molds for the manufacture of products from polymeric materials that do not require high ₅ pressure when filling the mold cavity, and the mold cavity can have any complex configuration.

A known form for the manufacture of polymeric materials, the semi-matrix of which is made of polymer metal-plastic compositions [1].

The disadvantage of this form is the presence of a mechanism for fixing the form in a closed state, which complicates the design of the form and leads to its cost increase.

Closest to the invention in terms of technical nature and the achieved result is a mold for the manufacture of products from polymeric materials containing semi-matrices of polymeric materials with a sprue hole for filling the cavity with feedstock [2].

A disadvantage of the known form is the need to use special devices for fixing the forming half-matrix to prevent self-disclosure of the form when it is filled with raw materials.

The purpose of the invention is to simplify the design of the form.

This goal is achieved in that in a mold for the manufacture of products from polymeric materials containing half-matrices of polymeric materials with a sprue hole for filling the cavity with feedstock, the half-matrices are made of a polymeric material with a magnetic filler introduced.

Figure 2

In FIG. 1 shows an upper half-matrix with a sprue hole; in FIG. 2 - lower half matrix.

The mold for the manufacture of products from polymeric materials contains an upper half-matrix 1 with a sprue hole 2 enclosed in a metal cage 3, a lower plumatrix 4 enclosed in a metal casing 5. For coaxial fixation of the half-matrices 1 and 4, there are concentric protrusions 6 at their ends.

The form works as follows.

Before pouring the feedstock into the sprue hole, 2 half-matrices are closed, then the feedstock is poured, and, ⁵ depending on its type and curing conditions, the mold is subjected to appropriate heat treatment. In this case, the upper half-matrix is held on the lower half-matrix under the action of magnetic forces 20 of the magnetic filler introduced into the polymeric material from which the half-matrixes 1 and 4 are made. The metal clips 3 and 5 serve to increase the strength of the half-matrixes. After polymerization and cooling of the product from a polymeric material, it is removed from the mold cavity. Then the mold is prepared for the next fill. Next, the cycle repeats.

The proposed implementation of the mold for the manufacture of products from polymeric materials30 makes it possible to simplify the design of the mold and reduce its cost by eliminating devices to prevent its self-opening during filling and polymerization of the feedstock from the magnetic forces of the half-matrix.

Claims (2)

A FORM FOR MANUFACTURING PRODUCTS FROM POLYMERIC MATERIALS, containing half-matrices of polymeric materials with a sprue hole for filling the cavity with feedstock, characterized in that, in order to simplify the design, the half-matrices are made of polymeric material with magnetic filler introduced. Council (53) 678.057 (088.8) (56) 1. V. Zakharov. Application of metal-plastic compositions in the manufacture of molding elements of injection molds. - In: Design of plastic products and accessories for their manufacture. LDNTP, 1973, p. 17-20. 2. US Patent No. 3813201, cl. B 29 C 1/06, 1974 (prototype).