SU1636118A1 - Mould for die casting - Google Patents

Abstract

The invention relates to foundry, in particular to injection molding. The goal is to increase productivity. The mold contains a movable half-form 1 and a fixed half-form 5. The gutter sleeve is located in the movable half-form and is made in the form of ratcheting movable inserts 3 entering the hole of the fixed half-form 5. , since it is in the closed volume of the inserts 3. The mold can be opened immediately after the casting solidifies, while the press residue is moved together with the sprue bushing and the movable half-form. After it solidifies, the liners 3 are moved apart by hydraulic actuators. 3 il.

Description

1

The invention relates to foundry, in particular to injection molding.

The purpose of the invention is to increase productivity.

FIG. 1 shows the mold after the metaplé press; in fig. 2 - the same, at the stage of release of the casting with the sprue and press residue; in fig. 3 - the same, with open liners, view of the movable half-form.

The mold contains a movable half-mold 1 with pushrods 2 located in it, detachable movable liners 3 connected to hydraulic actuators 4, and a fixed half-mold 5 with a chamber 6 of the press assembly and a press-piston 7. The cavity between the crank 1 and the fixed 5 half-molds and detachable plates 3 forms a casting 8 and lignin. 9. Detachable movable liners are fitted with a LITNICORI Bushing and a press bushing 10 is formed in it.

In the movable half-form, T-shaped rmu guides are made, along which the liners 3 move. The detachable liners 3 are L-shaped. The supporting parts and inserts are located in T-shaped grooves, and the parts b, when closed, the entrance r in the stationary half-form and tightly fit to the pressing chamber 6.

The mold works as follows.

Before pouring the mold is in the assembled position (figure 1). Detachable movable liners 3 with its protruding part b are D fixed half-form and play the role of gating sleeve.

Under the action of the press piston 7, the metal poured into the pressing chamber 6, through the lithium :: 9, fills the cavity of the mold, which forms the casting 8. Surplus of metal that has not entered the cavity of the mold, forms the press residue 10, which is located in detachable movable liners 3. After crystallization of the casting 8 (the mold residue is not yet in a fully crystallized state), the mold is opened. The movable half-form 1 moves away from the fixed one, while the otlika 8 together with the sprue 9 and the press residue 10 is located in the mobile half-form 1.

After exiting the fixed half-form 5 parts b of detachable movable liners 3, the latter, under the action of hydraulic actuators A, move in T-shaped grooves and release the sprue 9 with the pressure switch 10 (Fig. 3). The movement of the detachable movable liners 3 can be carried out in the course of opening the mold immediately after it leaves the fixed half of the mold or after it has completely opened, depending on the thickness of the mold residue 10. At the time of full opening of the mold, the casting 8 and the sprue 9 and the press residue 10 under the action of the pushers 2 is extracted from the forming matrix

movable half-form 1.

Further removal of the casting 8 occurs in the usual way. Since the press residue is in the closed volume of the liners, there is no need for

complete crystallization of the press residue and the pressure of the press piston can be transferred to the press residue when the mold is opened. This is particularly significant in thin-walled castings. When eum is excluded

breakthrough of the press stop and the chamber and back of the liquid metal on the mold plug. Crystallization of the press residue is more intense and by the time the mold is fully opened, the press residue is in a crystallized state.

Reducing the time of casting with prosss-tip in the mold leads to an increase in productivity and equipment utilization.

Claims (1)

Claims of the Injection Mold for Injection Molding, containing movable and fixed molds with shaping dies and sprue bushing, characterized with a hem, which, in order to increase productivity, the sprue bushing is installed in the movable mold and made in the form of detachable movable liners.