SU1366415A1 - Mould with two-stage ejecting system - Google Patents

Abstract

This invention relates to the field of polymer injection molding. The goal is to reduce the size and intensity of the form. For this, the advance mechanism is installed in the shank of the rod ejector of the final ejection 9. The advance mechanism is made in the form of a wedge 10, movable in the direction perpendicular to the ejection, and provided with guides 11 and 12. The guides are installed in the tubular ejector 6 and interact with the bevels made in the plate punches 3. 3 Il.

Description

SL

with a

 U1

Phil

one

The invention relates to the processing of polymers into products,

The purpose of the invention is to reduce the size and metal intensity of the mold.

Figure 1 shows the inventive casting mold at the beginning of the ejection cycle, a longitudinal section; in fig 2136

the same at the end of the ejection cycle; on fig.Z - section aa on fig ,.

The casting mold with a two-stage system (buoyancy) contains a fixed gating plate 1 and a movable system including a plate

2 matrices, a plate of 3 punches, a base 4, a plate of 5 pushers with tubular pushers 6 fixed at its pre-extrusion, a pusher 7, counter-pushers 8, In addition, the movable systems include pusher pushers of the final extrusion and the advance mechanism performed in a wedge 10, provided with guides P and 12, interacting with bevels 13 and 14, made in the plate

3 punch.

The proposed casting mold works in the following way.

When disclosing the shape of the pusher; 7 rests on the support of the injection molding machine. At this time, the plate 5 of the pushers with the tubular pushers 6 fixed in it and the counter pushers 8 stop, and the base 4 is connected with the plates of the dies 2 and the punches 3 ,. continues to move. As a consequence, the product is pushed out of the cavity shape by tubular pushers 6 and rod pushers 9. After the guide 11 rests in the bevel 13, the wedge 10 moves to. direction perpendicular to the direction of ejection, with the rod ejector 9 receiving an additional 3664152

this speed and pushes the product from the tubular ejector 6 (FIG. 2). When the mold is closed, the anti-pushers 8 abut against the fixed runner plate 1 and return the ejector plate 5 to the initial position. In this case, the guide 12 rests on the bevel 14, which causes the wedge 10 to move in directions perpendicular to the ejection direction, to its original position, as a result of which the rod ejector 9 also returns to its original position.

ten

The use of the invention allows to significantly reduce the size and metal intensity of the mold with a two-stage ejector system.

Claims (1)

Invention Formula Casting form with two-stage an ejector system for polymeric materials containing an immobile casting plate, a movable system including a base, matrix and punch plates, an ejector plate with tubular pre-ejector pushers, as well as final ejection rod ejectors, pushers, counter pushers and an advance mechanism, different the fact that, in order to reduce the dimensions and reduce the metal consumption of the injection mold, the advance mechanism is made in the form of a wedge with directions the tail part of the final ejector rod ejector is movable in a direction perpendicular to the ejection direction, and the guides are arranged in a tubular pre-ejector ejector and interact with bevels made in the plate punches. ;four (rig 2 12 Editor M.Ietrova Compiled by S.Shorin Tehred M. Dadyk Proofreader M. Maksimishinets fie.Z