SU1680542A1 - Casting mould for manufacturing slender hollow polymeric articles - Google Patents

Abstract

The invention relates to casting molds for the manufacture of long hollow polymer products. The purpose of the invention is to enable the manufacture of products in the form of two N-pipes connected by an H-shaped bar. For this, the means for moving the ejection plates are made in the form of twin, spring-loaded strips with symmetrical cuts installed on the fixed gating plate 1 on adjacent flange planes, which are fixed on the ejection plates, while on the movable plate of semi-matrix paired rollers for clamping one to another paired straps. When the form is unwound, the pushing bar of the lever parallelogram mechanism enters into work with a delay. During this time, the ejection plate held by the slats removes a part of the cast part with the ejector. in the semi-matrix of the product. Next, the strips come out of the engagement with the pins and the product is removed from the punches by the colliding strap. 5 il. THX

Description

The invention relates to a tooling for processing polymers, in particular to molds for the manufacture of long hollow articles by the method of injection molding.

The purpose of the invention is to enable the manufacture of products in the form of two N-pipes connected by an H-shaped bar.

FIG. 1 shows the shape, section; in fig. 2 - the same, cross section; in fig. 3 - the same at the initial moment of opening, longitudinal section; in fig. 4 is a view A of FIG. 2; in fig. 5 shows the molded product.

The casting form contains a fixed gating 1 and a movable 2 plates with semi-matrices 3 and 4 mounted on them, a punch 5 and a lever parallelogram mechanism consisting of four large levers 6 and four small levers 7, the upper bar 8, the lower fixed bar 9 and two hinges 10, which connect the semi-matrix with the arms b,. On the movable plate are mounted the ejection plates 11 with the ejectors.

The upper strap 8 of the parallelogram mechanism is connected through the rods 12 with a pushing strap 13. Means for peo

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displacement of the ejection plates 11 is made in the form of twin paired strips 14 with symmetrical notches 15 mounted on a fixed gating plate 1, and grooved rollers fixed to the ejection plates 16 on the mating surfaces of pins 16, which are fixed to the ejection plates. 17 for clamping each pair of strips to each other. The slats 14 are made with lead-in bevels 18 and 19 for the pins 16 and rollers 17. The punches 5 are fixed in the lower fixed plate 9.

The form works as follows. After injection of the polymer melt into the forming cavity and cooling of the product, the mold separates. The movable plate 2 with the half matrix 4 departs from the fixed gating plate 1. And the large 6 and small 7 levers of the lever mechanism rotate on the hinges 10, moving the upper bar 8 mounted on the lower fixed plate 9 to the punches 5.

The collision bar 13, which is connected by rods 12 with the upper bar 8, at the initial moment of the opening of the mold, chooses a free wheeling and does not remove the product from the punch. At this moment, the ejection plate 11 due to the pinning of the pins 16 with the strips 14 remains stationary and the ejector acts on the part of the molded product 19 located in the half-matrix 4, removing it.

After the strips 14 come out of the interaction with the 2 rollers 17 mounted on the moving plate, they are under the influence of

the pins 16 are consumed and the ejection plates 11 are moved together with the movable plate until the hollow parts of the product are completely removed from the punch 5. The closure of the mold is reversed by the action of the pins 16 and the the latter are inserted into the notches 15, stopping the ejection plates 11, the strips 14 by the rollers 17 are fixed against disengagement.

Thus, the form provides the possibility of casting long products with a complex profile transversely located relative to the longitudinal axis

cavities part.

Claims (1)

Formula of the Injection Molding mold for the manufacture of long hollow polymer products, containing movable and fixed plates with semi-matrices, connected by a lever parallelogram mechanism with pushing strips with punches, ejection plates with ejectors, and means for moving the ejection plates, characterized by that. that, in order to enable the manufacture of products in the form of two N-pipes connected by an H-shaped strap, the means for moving the plates the ejection is made in the form of paired, spring-loaded one to another straps with symmetrical cuts on the mating surfaces for pins mounted on a fixed gating plate, 5, which are fixed to the ejection plates, with paired rollers mounted on the movable plate to press paired planks against one another. // " Lb J5ft % FIG. five 6-6  fi