SU1228966A1 - Injection mould for die-casting - Google Patents

Description

The invention relates to foundry, in particular, to injection molding of non-ferrous metals and. alloys on machines with a horizontal extrusion chamber.

The aim of the invention is to simplify the structure.

FIG. 1 shows schematically a mold at the time of filling with metal; in fig. 2 is the same at the time the gating system is separated from the casting; in fig. 3 is the same at the time of removal of the casting and gating system from the mold.

The mold contains a movable half-mold -1 with an ejector system 2, an intermediate plate 3 in which the shaping cavity 4 is made, and a fixed half-mold 5 in which the pressing chamber 6, the press-piston 7 and the channels of the internal gating system are placed residue 8, sprue 9 and feeder 10. The latter is made on the lateral surface of the rod 11, which is 25 rolling system 2. During the closing process is installed in the fixed mold 5 of the mold, the rod 11 returns

to the starting position.

The invention allows to simplify

: with the possibility of axial movement on the value of h,. The intermediate plate 3 is connected to the fixed half-form 5 by the stop 12 stroke.

the design of the mold, to provide 30 reliable separation from the casting and the removal of the sprues from the mold, which reduces the cost of machining the castings.

The mold works as follows.

After pressing and crystallization, the alloy mold is opened along the T-t plane. When the mold is opened, the press piston 7 pushes the press residue 8 to the left and moves the intermediate plate 3. Together with it, the rod 11 moves to the left and moves to the free stroke value h 5 and then stops. The optimal value, where h is the thickness of the sprue 9. In this case, the sprue 9 completely leaves the gating channel of the fixed half-form 5..

Upon further movement of the press piston 7 and plate 3, the rod 11 separates the feeder 10 from the casting.

In the process of further movement of the press piston 7, the feeder 10 is released from the rod channel and the entire gating system is removed from the mold zone.

The mold is opened along the 11-P plane (Fig. 3), removing the casting from the half-mold ejecting the mold, ensuring reliable separation from the casting and removing the sprues from the mold, which reduces the cost of machining the castings.

physical

Claims (1)

PRESS-FORM FOR PRESSURE CASTING, having two connector planes and containing a fixed half-mold with a pressing chamber, a press piston and a gate system, an intermediate plate connected to the fixed half-mold, in which a casting cavity is made, a moving half-mold and a device for separating the gate system from the casting , characterized in that, · in order to simplify the design, the device for separating the gating system is made in the form of a rod mounted in a fixed half-mold with the possibility of axial movement, at On the lateral surface of the rod, a channel is formed that forms the gating system feeder.