SU1338970A1 - Injection mould for stamping molten metal - Google Patents

Abstract

The invention relates to foundry, in particular to the production of castings by stamping from a liquid metal. The aim of the invention is to improve the quality of castings by eliminating melt ingress on the walls of the mold at the moment of filling the bladder. The mold contains a spring-loaded matrix 2, on the upper end of which the lever is mounted 51 and g /. (/ F. (P 00 with 00 with vl

Description

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diaphragm 4, punches 6 and 7, actuator 5 of the diaphragm connector. At the time of pouring the metal into the metal receiver of the matrix 2, the diaphragm 4 is revealed. This eliminates the ingress of metal on the walls of the diaphragm. During the course of the punch on pressing the actuator 5 moves the halves

one

The invention extends from 1s to a foundry, in particular to the production of castings by stamping from a liquid metal.

The purpose of the invention is to improve the quality of castings by eliminating the melt falling on the walls of the mold at the time of the filling of the metal reservoir.

FIG. 1 shows the mold in the initial position; in fig. 2 shows section A-A in FIG. ; in fig. 3 - press form after filling the cavities with metal castings at the time of pressing.

The mold contains a lower support plate 1, a spring-loaded matrix 2 consisting of two plates and a working insert 3, a detachable diaphragm 4 with a drive 5, an upper punch consisting of plate 6 and a punch 7 fixed on the plate of the punch 8, a lower punch 9 connected to a pusher 10 of a hydraulic press. The lower punch has a water-cooling system, and the matrix 2 is connected with the upper punch plate 6 by guide columns (not shown), on the outer surface of the diaphragm is conical in juice 11, and in the upper punch - conical cavity 12.

The mold works as follows.

An α-melt is poured into the metal receiver of the matrix 2, after which the pressing is turned on and the plate of the punch holder 8 together with the upper punch consisting of the plate 6 and the punch 7 is lowered. In this case, the actuator 5 shifts the diaphragm 4 until it is fully closed, and its position is rigidly fixed by the upper punch plate 6 along the conical plane 11. After the upper punch is closed 6.7 with a diaphragm

diaphragm in the horizontal direction, the diaphragm closes and locks along the conical axis 11. The matrix goes down and the metal is squeezed out through the holes in the diaphragm in the cavity of the casting in the diaphragm and punch. 3 il.

0

4, by continuing downward movement of the matrix 2 relative to the fixed lower punch 9, the melt through the apertures of the diaphragm 4 fills the cavities of the upper punch.

At the end of the shaping and the creation of a predetermined pressure, a loss is carried out for the crystallization process under pressure.

Then, the upward movement is switched on, the upper punch 6.7c with the plate of the hollow holder 8 rises upwards, and the press residue with the castings located on it is held by the diaphragm and remains in the die. Upon further upward movement of the upper punch, the actuator 5 pushes the diaphragm 4 apart, and at the end of the mold opening, the press residue with the castings is pushed out by the lower punch 9.

Performing zapirayush x conical surfaces on the punch and the diaphragm helps to create a force when pressing, opposite in sign to the force of opening the diaphragm. This force, which depends on the angle of inclination of the conical surface along the outer surface of the diaphragm, is proportional to the pressure: the greater the pressing force, the greater the force that prevents opening of the diaphragms. Such interaction of the upper punch with the diaphragm leads to tight locking of the form during its long work.

5 and, thus, makes it possible to obtain a casting without blocking along the lateral surface, removal of operations for its removal, the possibility of eliminating the allowance on the lateral surface for machining, as well as safe and reliable operation of the die.

five

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The mold ensures that the metal reservoir is filled at the opening of the diaphragm, which prevents metal from entering the walls of the diaphragm and, therefore, the formation of junctions in the casting. Moreover, the time between the start of the melt pouring and the pressing moment is significantly reduced. Press form

may be single and multiply,

is universal, can be used to obtain a wide range of castings.

Claims (1)

The invention of the mold for stamping a liquid metal containing-spring-loaded a die with a metal reservoir, upper and lower punches, a detachable diaphragm with a conical suction on the outer surface mounted on the upper end of the die, and an aperture connector actuator that is different in order to improve the quality of castings by eliminating melt ingress on the walls of the mold at the time of filling the metal reservoir, the diaphragm is installed with the possibility of horizontal movement along the end of the matrix, while in the upper punch of the exudate, there is a cavity with a conical surface interacting with a conical n skom diaphragm.  Z /////////////