SU994272A1 - Mould for polymeric articles - Google Patents

Description

The invention relates to the field of processing of polymeric materials and can be used for the manufacture of products with protrusions by the method of injection molding.

A casting form is known which contains a composite matrix, ejector plates with wedge-shaped columns / interactions trapped in them with shaped signs 11.

The closest in technical essence and the achieved effect to the invention is a mold for polymeric products containing sliding semi-matrices with a spruing runner channel in their plane. connector, interoperability with columns, punch and shank located at the base 2.

However, in known forms, the magnitude of their movement during opening to remove products must exceed the double length of the latter.

In the manufacture of long products, this leads to irrational use of processing equipment - the need to use high-capacity thermoplastic /

The aim of the invention is to reduce the size of the mold due to coKpai Ei ejection stroke.

This goal is achieved by the fact that a Lykh'ev mold for polymeric products containing sliding semi-matrices with a diverging gate in the plane of their connectors, interacting with columns, a punch and a tailing 10 placed in the base, sliding semi-matrices equipped with inserts spring-loaded with spherical heads. for which are made symmetric with respect to the diverter

15 gating channel and the holes connected to it. The columns are rigidly connected with the shank and installed with the possibility of interaction with the spherical heads of the inserts under which recesses are made in the areas of interaction of the columns.

FIG. 1 shows the shape of the cross section in FIG. 2 is a view along the plane of the connector along arrow A; in Fig.25, the form node # d d sliding semi-matrix at the time of removal of the product.

Claims (1)

The casting form contains a fixed half-form including gating pad 1, ferrule 2, punch 3 and locking 30 wedges 4. The movable half-form contains sliding semi-matrices, 5, b with the spacing gating channel 7 in the plane of their connector, interacting with columns 8, rigidly connected with the shank 9 and installed with the possibility of interacting with the spherical heads 10 of the inserts 11. In the movable semi-matrices 5, b there are symmetrically arranged relative to the distributing gate 7 and connected with it the holes 12, in which The spring-loaded inserts are installed 11.. In the areas of interaction of columns 8 with spherical heads 10 of insert 11, grooves 13 are made. To interact with koloirk 8 with moving semi-matrices, bevels 14 are pre-drained, with respect to the base 15, the caudatevic 9 is spring-loaded with power elements 16. Casting form works as follows. After polymer injection and processing time, the mold is opened, and the punches 3 are completely removed from the products. Further, due to the interaction of the shank 9 with the stop of the injection molding machine with the icings 14 of the columns 8, the semi-matrix 5 opens, b, thus freeing the product, the product is held by the spreading sprue, which is fixed by inserts 11, by sliding spherical heads 10 along the section of interaction with the columns 8. At the end of the disclosure, the shapes of the head 10 are aligned with the depressions 13 and the fixed inserts 11 retraction 5 zags from the spacing sprue, forming with the latter a gap of 0.001-0.0015 m, and the 1st one is removed under the influence of gravity we are in the connector between the jaws 5,6. When the column 8 is closed, the force elements 16 are moved to the initial position, the spherical heads 10 of the inserts 11 are led out of the recess; Research institutes, sliding semi-matrices 5,6 are closed and locked by locking wedges 4. The use of this invention will allow more efficient use of processing equipment. Invention Casting mold for polymeric products containing sliding semi-matrices with a diverging gate in the plane of their connector, interacting with columns, punch and shank, placed at the base, characterized by the fact that, to reduce the size of the mold due to reduction of the ejection stroke, the sliding semi-matrices are fitted with inserts spring-loaded with spherical heads, for which symmetrical with respect to the spruing runner channel and the openings connected to it are made, and the columns are gesture are connected with a shank and installed with the possibility of interaction with spherical heads of inserts, under which recesses are made in the areas of interaction of columns. Sources of information taken into account during the examination 1. USSR author's certificate 470362, cl. In 22 D 17/22, 1973, 2.vidhof NB Fundamentals for the design of thermoplastic injection molding molds. M., Mechanical Engineering, 1979, p. 19, fig. b (prototype).