SU551114A1 - Die casting mold - Google Patents

Description

one

The invention relates to the beverage industry, in particular to the injection molding of non-ferrous and ferrous alloys.

A known mold for die casting, in which the sprue section is produced simultaneously with the opening of the mold. The mold is provided with a cutting plate located between the half-molds and made by the tractor along the guide columns connected to the fixed half-mold. A through hole is made in the slab, the edges of which perform the role of an annular knife l.

However, the known mold is designed mainly for otoivka with annular nftiv nickname system. The plate is moved by clamping its gating system to the movable half-form, which does not always ensure the separation of the sprues.

The purpose of the invention is to expand the range of castings and increase the reliability of the molds .vibt.

This is achieved by the fact that the movable half-form is equipped with a drive for moving the cutting plate, stepped pushers of the goo, mounted into the ejector plate of the casting and interacting with the cutting plate, as well as with an additional ejector plate for the ejector / runner .

FIG. 1 shows a mold, in FIG. 2, a fixed form in c. the moment of ejection of the casting and gating system,

The mold for casting under pressure has a movable 1 and a fixed 2 half-form, interconnected by columns 3.

Under the castings 4 in the plate 5 of the movable half-form 1 and in the insert 6 of the non-double half-form 2, shape-forming posts are made.

In the plane of the insert connector 6 Have a configuration that repeats the outer contour of the casting 4 in the plane of the connector.

On the movable half-mold 1, the slab plate is installed, in which a through hole a is made, the configuration of which corresponds to the outer contour of the casting, eject

Valya plate 8 with ejectors 9 casting 4 and stepped pushers 10, as well as an additional ejection plate 11c ejector pusher 12 gating system 13. Both plates are interconnected t hams 14. In plate 5 there are holes b, and in the detachable plate 7 holes in the under-step pushers 10. Cut-off plate 7 is connected by rods 15 with a drive for its movement, which consists of a hydraulic cylinder 16j of a movable plate 17 5 connected to the rod of the hydraulic cylinder 16 and with rods 15.

The mold works as follows.

After the metal is pressed in, the mold is opened, and the limit switch 18 connected to the control electric hammer (not shown) ensures that the working fluid is supplied to the pressure in the hydraulic cavity 16 of the hydraulic cylinder 16 through the hole 19. The piston cavity of the hydrodil. with a sink. At this moment, the plate 7 is cut off; pressed to the plate 5 using t g 15, connected to the movable plate 17 of the hydrosynder 16.

As the movable mold 1 moves to the left extreme position of the insert 6, the mold half 2 leaves the holes a made in the cutting plate 7, while the gate system 13 in the slurry position along the plane of the connector is pressed by the cutting plate 7 to the plate 5.

At the moment when the ejector plate 8 is in contact. with machine pusher pins (not shown), ejectors 9 pushed out castings 4, and since the gate system 13 at this moment is clamped between the cutting plate 7 and plate 5, the sprues are cut to the flow along the outer contour of the casting, and the castings 4 themselves move in the holes a of the cutting plate 7. The step pushers 1O at the same time, move freely in the holes b and in the plates 5 and 7.

After the castings 4 are separated from the sprues and flowed down, as the ejector plate 8 continues to move, the end switch 18 is activated, and the electric hammer connects the hole 19 to the drain.

After the castings 4 leave the limits of the holes a, the stepped pushers 10 uprill the shoulders 21 into the cutting plate 7 and begin to move it, freeing the gating system 13.

Together with the cutting plate 7, the movable plate 17 of the hydrocylinide 16 is also moved by the tg 15.

After moving the cutting plate 7 to a distance sufficient to eject the press residue 22, the ejector plate 8 contacts the headstock 23 tons and 14, and the pushing ejecting lines 8 and 11, as well as the cutting plate 7, begin to move, and the ejectors 12 are removed from press forms gating system 13 with gfess - residue, 22.

After removal of the gating system, the mold is closed. Upon contact of the stepped pushers 10 with the fixed half-form 2, the pusher plates 8 and 11 begin to retract, the limit switch 18 is triggered, which gives the command to switch the electrostock, moving the pressure plate of the hydraulic cylinder 16 to the left and Td, din, and 15 sub, still cut off plate 7. When the ejectors 8 and 11 touch each other, their joint movement to the initial position begins. Press -4 | Orme closed.

The invention makes it possible to increase the reliability of the operation of the mold and to ensure high-quality separation of the sprues and gates.

Claims (1)

1. USSR Author's Certificate No. 499963, 22 D 17/22, 1973.