SU579097A1 - Pressure casting mould - Google Patents

Description

one

The invention relates to foundry, in particular, to pressure molding of metals and alloys.

A known die casting mold in which automatic casting of the casting with sprues is ensured. The mold contains fixed and movable half-form. A fastener plate with posts, poises and ejector plates are installed in the movable half-form. The ejector plates are equipped with main and accelerator ejectors which are driven by a pivoting lever. The swivel lever informs the ejector and the accelerated movement at the end of the ejection stroke, which ensures that the casting is separated from the main ejector and a free fall (1.

The disadvantage of such a mold is that the casting with sprues may not fall out due to a number of projections from the splitter, rods, ejectors, projections at the stepped connector of the mold. In addition, precipitation may be prevented by blotting along pulled out yavstels. It is also difficult to use this ejection system for castings of small sizes due to difficulties in the location of the ejectors. The design is complicated in preparation (HH lipids have a large number of ejectors, swiveling levers. Installation of accelerating ejectors requires up to vodka during assembly.

The aim of the invention is to simplify the design, increase its reliability and expand the casting nomenclature.

The goal is achieved by the fact that, in the proposed mold, the punch plate is mounted to move axially along guide columns and is spring-loaded, while the mold is provided with latches installed in the racks, and grooves for the latches are made in the pusher plate.

FIG. 1 shows the proposed mold for injection molding, a cut; in fig. 2 - mold at the time of ejection of the casting.

The mold contains fixed and movable half-form. The fixed half-form includes a fastening plate 1, a matrix plate 2.

The movable half-form includes fastening plate 3, pillars 4, intermediate plate 5, backing plate 6, punch plate 7, liner 8, ejector plate 9, ejectors 10. Fixed gangs 11 with springs 12 are installed in grooves 13 made in

ejector plate. Plate poo ;; ss and 7 str. Mounted for axial movement along guide columns I. On the intermediate plate 5 and on the plate of the punch 7 brackets 15 are installed, in which a screw 16 is fixed to limit the stroke of the punch plate 7 and the spring 17.

The mold works as follows.

After pressing in the metal, the mold is opened. When the movable half-form moves to the left, the punch plate 7 under the action of the springs 17 moves to the right, the casting is separated from the pushers 10. At the same time, the pusher plate 9 is prevented from moving by the locking pins. casting and sprue. The castings, the exit from the design cavity of the liner 8, freely fall downward, since they are no longer held by the pushers.

Simplifying the design of the injection mold significantly reduces the manufacturing cost of the latter; Reliability in work

and the wide range of applications helps to reduce the cost of castings produced by injection molding.

Claims (1)

1. Herman h Ah Casting ejection for dropthrough shot removat. - “Die Casting Engineer, 1975., 9, ъ 3, p. 34-36.  f f and  7, G