SU515645A1 - Press form - Google Patents

Description

one

The invention relates to devices for the processing of polymeric materials into articles.

Molds for processing polymeric materials into products are known, including a system of movable and fixed plates and an ejection system containing a ball latch mechanism 1. However, such molds have rapid wear of the ball lock due to the small contact surfaces of the balls and high stresses at the beginning of the stroke ejector system.

The closest technical solution to the invention is a mold for the manufacture of products from polymeric materials, including a non-moving part containing a runner plate, and a movable part containing a plate of punches, an intermediate plate with a sleeve, an ejector plate with placed ejector and a spring-loaded cam interacting with the connector of the mold with the sleeve (2).

The purpose of the invention is to ensure the ejection of products having a large contact surface with the decorating parts.

For this, the mold is provided with a plate for removal with a pusher fixed in it, and in the spring-loaded cam there is a hole for the passage of the pusher.

ABOUT

FIG. 1 shows the disclosed form with the ejector device in the initial position; in fig. 2 - ejector device after this product with a punch plate

vytalivapi; in fig. 3 is the same after completion of the ejection.

The mold contains a fixed gating plate 1, movable plates including a plate of 2 puapsons with a punch 3, an intermediate plate 4 with a sleeve 5, a plate of 6 ejectors with ejectors 7 placed in the beater and a spring-loaded cam 8 installed with the possibility of displaceable movement in a directional direction

perpendicular to the movement of the pusher 9 fixed in the removal plate 10, the support plate 11 connected by pillars 12 with the intermediate plate, Uiara 13, the shank 14 fixed in the ejection plate, the counter pusher 15 and the product 16.

The mold works as follows. At the beginning of the ejection stroke, the shank 14 is pulled out to the support of the injection molding machine (not shown in the drawings), and the movable plate 6 of the extractors begins to move along with the ejectors 7, the counter-pushers 15 and the spring-loaded cam 8. At the same time, the followers 9, which work, also move in subcircuit cams 8, c

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The removal plate 10 is set in motion, which allows the removal of the product 16 from John 3. The ejectors 7 remain immobile with respect to the removal plates 10 for a certain moment and therefore do not participate in the removal of the product 16 at the initial ejection time.

Upon further movement of the movable plate 6 with the spring-loaded cams 8, the latter, with their bevels, interact with the sleeve 5 and move, squeezing the spring, in the direction perpendicular to the movement of the movable plate 6 (Fig. 2). When the axis of the hole in the cam 8 coincides with the axis of the pusher 9, the latter pass unhindered into these holes and stop together with the removal plate 10 due to the interaction of the stops 13 with the plate 2. Continuously moving, the mobile plate 6 with the ejector 7 pushes the products out plate removal (matrix) 10 (Fig. 3).

When the closures of the molds under the action of the counter pushers 15, the movable plate 6 returns to its original position and the spring-loaded cam 8 is removed from the pusher 9 and the spring returns to its original position.

The greatest effort to remove products occurs at the initial moment of movement of the removal plate 10, when mutually displaceable parts (spring-loaded cam 8 and

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pusher 9) remain fixed relative to each other, which reduces the abrasion of these parts. In addition, the simplicity of the proposed design makes it easy to adjust to compensate for wear (for example, by installing a washer at the base of the pusher 9).

Claims (2)

1.Yu. P. Manikhin, “Multi-star automated injection molds for thermonlast products, Leningrad, 1970, pp. 8-9. 2. Author's certificate N ° 295672, cl. V29s 1/00, 1971 15 3 /, J J ten eleven sixteen