SU1380984A1 - Mould with two-stage ejection of articles - Google Patents

Abstract

This invention relates to the processing of plastics by casting under pressure. The goal is to simplify the design, increase reliability in operation, reduce the size and shape of the metal. For this, the slider 10 is mounted in the rod 8, made with a through groove 9, with one end of the slider being designed as a bracket 1 1, which interacts with the pre-ejection plate 4 and the other end as a wedge 12, which interacts with the bevels 13 and 14 made in the base plate 3, wherein the pre-ejection plate 4 is provided with a groove 15 parallel to the direction of ejection. 3 il. -; S (L from 00 to from 00 4 S Pu2.1

Description

The invention relates to the processing of plastics by injection molding.

The object of the invention is to simplify the design, increase the reliability of operation, reduce the size and metal intensity of the mold.

Fig, 1 shows a casting form, a closed position, a longitudinal section; in fig. 2 and 3 are consecutive positions of the ejector system when the mold is opened

The casting mold comprises a fixed half-mold 1 and a movable half-mold 2 comprising a base plate 3, a pre-ejection plate 4 with ejectors 5 placed in it and a final ejection plate 6 with ejectors 7 placed in it, as well as a rod 8 connected with a final ejection plate 6 and provided with a groove 9 in which a slider 10 is installed, one end of which is made in the form of a bracket 11 and the other end is in the form of a wedge 12. In the base plate 3, bevels 13 and 14 are made, and in the plate 4 pre popping out az 15. Furthermore, the movable half-mold comprises limiter 16 for limiting the movement sluzhschy plate 4 preliminary ejection.

Casting form works as follows.

After the mold cavity has been filled with a polymeric material (Fig. 1) and the necessary exposure, the movable mold 2 is moved away from the fixed mold 1 and the brush 8 moves the final plate 6 and the preliminary ejection plate 4 connected between each other by a slider 10 abutting the bracket 11 into the plate 4 pre-popping. The wedge 12, interacting with the bevel 13 made in the base plate 3, moves the slider 10 in the groove 9 to the left position, and after the bracket 1 1 is disengaged from the pre-push plate 4 (Fig. 2), the plates are released. The pre-ejection plate 4} 1 and with the ejector 5 located therein abuts against the stop 16 and stops, and the plate 6 of the final ejection with

Yu

15 20 25 30 35

40 5

0

five

placed in it ejector 7 continues to move. At the same time, the slider Yu freely passes into the groove 15. The products are ejected by the ejector 7 from the ejector 5 (FIG. 3). When reversing the plate 6 of the final ejection, the wedge 12, interacting with the bevel 14, causes the slide 10 to move in the groove 9 to the right position. When this occurs, the final plate 6 and the pre-ejection plate 4 are bonded and they are returned to their original position together.

The proposed form, in comparison with the known form, is distinguished by a simpler design, increased reliability in operation, reduced dimensions and metal intensity of the form.

In addition, the proposed casting form has greater maintainability, since it is possible to quickly replace the most loaded element (ram) without disassembling the casting mold. I

Claims (1)

Invention Formula A mold with a two-stage ejection of products, comprising a fixed half-form and a movable one, including a base plate, preliminary and final ejection plates with ejectors placed in them, a rod connected with a final ejection plate and a mechanism for forcibly co-moving the preliminary and final ejection plates, including a slider movable in a direction perpendicular to the direction of ejection, characterized in that, in order to simplify the construction, work, reduce the size and metal form, the slider is installed in the rod, made with a through groove, with one end of the slider made in the form of a bracket, with an emphasis on the pre-ejection plate, and the other in the form of a wedge, and in the base plate made bevels contact with the wedge, and the pre-ejection plate is provided with a groove parallel to the ejection direction. t 12 / 3 (fi / e.i Mf 6 L. Povhan 13 FigZ Compiled by V. Kazakov Tehred M. Khodanych Proofreader A. Obruchar