SU954167A1 - Injection mould for liquid metal forming - Google Patents

Description

(5) PRESS FORM FOR PUNCHING FROM LIQUID METAL

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FIELD OF THE INVENTION The invention relates to foundry, in particular, to iH3 stamping of a liquid metal.

Closest to the proposed -. is a liquid stamping mold containing a movable matrix puller, punch and pillars. The puller is supported in the upper initial position by elastic elements - springs, mounted on racks, which serve as guides when the scientific research institute of the puller moves vertically. The matrix is also installed on the springs. The punch is rigidly attached to the top plate and, when it moves down, it passes through the hole in the puller and moves with it as a unit along the guide posts. After the stripper is in contact with the die, a cavity is formed, into which, upon further movement of the die, the die and the stripper, the metal moves, producing a molding of the casting. After sealing the casting punch

rises, the matrix returns to its original position. The castings are removed from the die together with the punch and removed from it at the approach of the puller to the stops on the guide pillars 13.

A disadvantage of the known construction is that when high castings are produced, the elastic elements supporting the puller in the upper position increase to the size at which they work at the limit of permissible compressive loads (thus, quickly deteriorate) or do not have enough of them at all. move about

. The purpose of the invention is to increase the reliability of the mold

This goal is achieved by the fact that, in a known device, the matrix, punch, puller with elastic elements and racks mounted on the base are made of elastic elements in the form of spring-loaded rods with rollers placed horizontally in the puller on the inner surfaces of the racks. grooves at an obtuse angle to the base, while the rollers of the rods are placed in the guide grooves of the racks.

FIG. 1 shows a schematic representation of a mold in its initial position, general view, section, FIG. 2 - the same in the working position; in FIG. 3 the same, at the time of the casting extraction; in fig. k - section aa in fig. K

The mold contains the base 1, on which the matrix 2 is rigidly fixed, inside which the ejector 3 is mounted, screwed onto the rod 4 of the lower cylinder of the hydraulic press. The matrix is equipped with figured racks 5 with grooves & , the working internal surface of which forms an obtuse angle with the base. The grooves move the rollers 6 with the rods 7, which move in the cavity 8 of the puller 9. Each pair of rods is preloaded by a spring 10. A punch 11 fixed from the mandrel 12 of the main working cylinder of the hydraulic press enters the puller opening from above.

The mold works as follows

In the previously opened, lubricated and heated matrix 2 pour a measured portion of the liquid metal (Fig, 1). After that, the upper cylinder of the hydraulic press is turned on, the mandrel 12 with the punch 11 pushed on it and entering the hole of the puller 3, and the puller itself move as a single unit Rollers 6, moving in the inclined grooves of the struts 5, move the rods 7 into cavity 8, compressing the spring 10. When moving downward, the puller and the punch overlap the matrix 2. The liquid metal in the matrix is displaced upwards,

filling out the form, after which crystallization and compaction of the metal occurs (Fig. 2). After being pressurized until the casting is completely solid, the upper cylinder of the hydraulic press removes the punch 11, the puller 9 and the casting 13 from the die 2, all of the above-mentioned parts of the mold move to the stop, after which the puller 9 stops and the punch 11 is removed from the casting 13 which is removed from the press zone. The rods 7 rollers 6, pursed

spring 10, hold the puller E in the upper position. After inspection and lubrication, the mold is reassembled and ready to go.

The invention makes it possible to increase the durability of the elastic elements and thereby the reliability of the operation of the mold.

Claims (1)

Invention Formula A punching mold made of molten metal, containing a matrix punch, a puller with elastic elements and racks installed on the base, in order to increase the reliability of the work, the elastic elements are made in the form of spring-loaded rods with rollers horizontally placed in the puller, on the inner surfaces of the uprights, the guide grooves are made at an obtuse angle to the base, while the rollers of the rods are placed in the guide grooves; racks Sources of information taken into account during the examination 1. A. Batyshev. Stamping liquid metal. M., Mechanical Engineering, 1975, p. 80, fig. five. 1 FIG. 2 FIG. A- / I Fy