SU884849A1 - Injection mould for pressure die casting - Google Patents

Description

(54) PRESS FORM FOR MOLDING UNDER PRESSURE

The invention relates to foundry production, in particular to the injection molding of metals and alloys. Closest to the proposed technical essence and the achieved result is a mold for injection molding, containing a stationary half-form and a movable one, including a fastening plate, a removal plate, ejectors and stops associated with the hydraulic ejector of the casting machine. The pushers are provided with shanks and are installed in the plate, removable with the possibility of axial movement. Restrictive projections are made on the shanks of the ejector. The movable part is provided with a bar installed in the fastening plate with the possibility of vertical movement. Holes for ejector shanks are made in the mounting plate and on the bracket. The removal plate is rigidly connected to the stops, and the latter are made with cone-shaped projections interacting with the ends of the bar I. The disadvantage of this construction lies in its complexity. The purpose of the invention is to simplify the design. This goal is achieved by the fact that the mold containing a fixed half-mold and a movable one consisting of a fastening plate, a removal plate connected to the hydraulic ejector of the casting machine, an ejector plate with pushers, is provided with spring-loaded latches hinged on the movable semi-mold with the possibility of interaction. with an ejector plate, and wedges mounted on a fixed form and interacting with spring-loaded latches. FIG. 1 shows a mold in a closed position, a general view; in fig. 2 - the same, when opened; in fig. 3 - the same, when ejecting the casting from the slab.

The mold contains movable and fixed half-molds. The movable half-form includes a fastening plate 1, an ejector plate 2, intermediate plates 3, a removal plate 4, which is rigidly connected by means of tongs 5 to the rocker 6, in which the shank 7 of the hydraulic cylinder of the casting machine is fixed. Spring-loaded latches 8 are hinged on the plate 3. To adjust the stroke of the pushers 9 and the anti-knobs 10, the adjusting screws 11 are fixed in the latches 8, fixed by a spring plate 12. The fixed molds 13 have a wedge 14. The internal cavities of the castings 15 are decorated with rods 16.

The mold works as follows.

After pressing and holding the metal, the mold opens. The ejection cylinder is then activated. When moving, the rocker 6 rests on the plates 2 of the pushers and moves them simultaneously with the plate 4, which removes the casting 15 from the rods 16. After releasing the latches 8 from the wedges 14, the push rod 2 is fixed by latches (Fig. 2).

The ejection of the ejection hydrocylinder is switched on, at that the plit 4 removal returns to its initial position. Since the clips secure the ejector plate and prevent it from returning to its original position, the casting remains on the pusher 9. The casting is removed from the pusher by a puller or falls into the drive under the action of its own weight.

When the mold is closed, the latches are pressed by the wedges 14 and the counter-push ejector plate; 10 returns to its original position.

The invention allows to simplify the design of the mold, increase the reliability of work, and extend the range of castings.

Claims (1)

1. USSR author's certificate 582049, cl. B 22 D 17/22, 1976. S 2 f 7 11 12 (rig, Z