SU1447691A1 - Casting mould with stepped removal of articles - Google Patents

Abstract

This invention relates to the injection molding of polymeric materials into articles. The goal is to increase reliability and simplify the form design. For this purpose, the pushers 11 are made in the form of a spring bushing with rectangular turns. The pushers are fixed in the pushing plate 7 and placed on the counter-sliders 9. 2 Il.

Description

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The invention relates to the processing of polymeric materials into products, in particular, injection molds for the manufacture of products having a large contact surface with the decorating parts and requiring stepwise removal, and can be used in the chemical industry and mechanical engineering.

The purpose of the invention is to increase the reliability and simplify the form design.

FIG. 1 shows the injection mold in a closed state, a longitudinal section; on fng. 2 consistent position of the ejector system when opening the form.

The casting mold contains a fixed plate 1, a movable plate 2, a matrix 3, an incineration plate 4 rigidly connected to a movable plate by bars 5 and in a bar with matrix 6, a plate 7 with tubers 8, counter-pushers 9 and twigs knobs 10. The pushers 11 are made in the form of a spring bushing with rectangular turns and are placed on the countershaft 9. The rod 2 is fixed in the sub-plate 2. The plate 13 is rigidly connected to the shank.

The casting form works as follows.

After filling the mold with its polymer and the corresponding shutter speed, the form is opened. The mobile part ij) OpMb departs from the fixed. When the moving part is moved to the extreme left position, the shank 13 abuts against a fixed stop (not shown). The plate 7 with tubular, head 8, counter-pushers 9. ejector pushers 10 and pushers;: mi 1 stops, and the movable plate 2 gG flies with the rods 12. The pushers 11, which are on the counter shots 9, have sufficient longitudinal stability and elasticity, which must be greater than the sum of the frictional forces in THi ax 6 and the specific adhesion forces of the polymer with the rod 1 and 12, as a result of which they operate as; ; | th pushers. Contact

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with the die 3, together with the pushers 8 and 10, they force the matrix along with the products 14 and the sprue system 15 into reverse movement. In this case, the products 14 are removed from the rods 12 (the first stage of removal). Upon further movement, the matrix 3 stops due to the interaction of r 6 with the base plate 4.

Continuing its movement, the movable plate 2 t is not the matrix 3 and compresses the pushers And, which ensures the pushing out of the shape of the products 14 by tubular pushers 8 and the gating system 5 of the pusher 10, while separating them (second stage of removal). Then the form is closed.

At the beginning of the clamping of the mold, the pushers 11, uncoupling, hold the shanks 13 and pl 7 with the pushers 8 and 10 on the machine stop, and the movable plate 2, together with the die 3 and the base plate 4, moves to the right to remove products 14 and the gating system 15 if they are stuck on the ejector.

Upon the further closure of the injection mold, the counter pushers 9 and the die 3 abut against the fixed plate 1 and return the ejector system to the initial position, the final closure of the 4) Orma occurs. Then the cycle is repeated.

Claims (1)

Invention Formula The casting mold with stepwise removal of products, contains 1, while the fixed and movable plates, the matrix and the supporting plate, connected by means of traction, are connected to the ejector:; koitrtlkatel and pushers, made with the possibility of interaction with the matrix, which hem, that, in order to increase reliability and simplify the design of the form, the pushers are made in the form of a spring hub with rectangular turns - cats. x