SU1212827A1 - Casting mould for manufacturing hollow polymeric articles - Google Patents

Description

The invention relates to the processing of polymers and can be used to make hollow articles.

The aim of the invention is to increase the reliability of the form at work and reduce its metal consumption.

FIG. 1 shows a casting form, a view of the mobile. semi Matrix; in fig. 2 shows section A-A in FIG. 1 (in the closed state of the injection mold); in fig. 3 - the same, in the open state; in fig. 4 shows a section BB in FIG. one; in fig. 5 shows a section in FIG. 2; in fig. 6 - section G-Y in FIG. 2 ..

The casting form contains a fixed semi-matrix 1 with a locking protrusion 2, a movable semi-matrix 3 with a slider 4 installed in it, in which the forming sign 5, the base 6, an ejection system including the side 6 of the base 6 with a bevel 7 on the end of the shank 8 mounted parallel to the connector plane The insert 9 mounted at the base is movable parallel to the plane of the connector and formed with a protrusion 10 at one end and with a bevel 11 at the other for interacting with the bevel 7 at the end of the shank 8.

The slider 4 is made with guides. pins 12 and protrusion 13 for engagement with protrusion 10 of liner 9, and in the movable semi-matrix 3 there are copied grooves 14 for guide pins 12. Shank 8, which is installed in the base 6 with the possibility of axial movement, is fixed from rotation by the tongue 15.

In the movable semi-matrix 3, a groove 16 is made under the protrusions 13 and 10, respectively, of the slider 4 and the insert 9.

The ejector 17 of the central sprue is spring-loaded.

Such a constructive solution makes it possible to eliminate the spring-loaded clamp of a slider delay, which, due to the weakening of the spring, can be displaced by its own weight, and the ejection plate, which generally improves the reliability of the mold and reduces its metal consumption.

The form works as follows. 0 After injection of the polymer and technological exposure, the mold is opened, the shank 8 rests against the support of the injection molding machine, and the movable semi-matrix 3 with the base

6 continue movement. With this bevel

7 of the shank, interacting with the bevel 11 of the liner, the latter is moved and due to the interaction of the protrusion 10 with the protrusion 13 of the slider moves it upwards. The movement continues until the base 6 stops against the travel stop made on

0 by the shank 8. Thanks to the guide pins 12 and the coping grooves 14 (having vertical and inclined to the vertical plane sections), a plane-parallel (separating plane) movement of the slide 4, during which the product is partially removed from it, and further (due to the inclined sections of the copier grooves) the product is removed from the movable semi-matrix and falls under its own weight.

The central sprue is removed by the ejector 17.

When the mold closes, the locking protrusion 2 sets the slider 4 to the initial position, which, by interacting with the insertion 9, returns it to the initial position, moving, in turn, the shank.

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Claims (1)

Injection mold for the manufacture of hollow polymer products, comprising a fixed semi-matrix with a locking protrusion, a movable semi-matrix with a slide installed in it, in which a forming sign, a base, an ejection system having a shank and an insert, which is characterized by that, in order to increase the reliability of the form in work and reduce metal consumption, the shank is made on the side of the base with a bevel at the end, and the liner is installed in the base with the ability to move pa Allelic parting plane and formed with a projection at one end and with a chamfer at the other for engagement with a bevel on the end of the shank, the slide is configured with guide pins and a projection for cooperation with a projection of the insert, and the movable jaws carried Die sinking grooves for guide pins. Figure 1