SU1475767A1 - Injection mould - Google Patents

Abstract

This invention relates to the field of injection molding. The aim of the invention is to obtain loose castings. At the end of the working part of the forming rod 13 there is a cut element 18, the cutting edge of which corresponds to the shape of the casting hole being machined. When removing the casting from the rod 13, the trimming element 18, with its cutting edge, cleans the burr in the hole of the casting. The use of the trimming element 18 allows to obtain a layer-free casting in the mold operation cycle, which reduces the technological cycle of casting production and eliminates the need to use special equipment to remove the casting in the casting holes. 2 Il.

Description

This invention relates to injection molding.

The aim of the invention is to obtain loose castings.

FIG. 1 shows a mold, a general view, a section; in fig. 2 — node I in FIG. one.

The mold consists of a fixed half-form, including a holder 1, a fastening plate 2, guide columns 3, a die 4, a sprue bush 5, and a movable half-mold including a holder 6, a backing plate 7, a base plate 8 ejecting the plate 9 , pressure plate 10, ejector 11, floating ejector 12, forming metal rod 13, die 14, insert 15, guide sleeves 16, reverse rammers 17. At the end of the working part of the forming metal sterne 13 there is a cut element 18, the cutting edge of which corresponding to tvuet processed form openings casting (working portion profile rod). In the fixed mold 1, a cavity is provided for accommodating a trimming punch.

The mold works as follows.

During the casting process, after the liquid metal is pressed in and the casting solidifies, the mold is opened and the casting is removed. When opening, the movable half-form departs from the fixed half-form along the line of the connector; as it moves, the pressing plate 10, hitting the stops of the casting machine, leads

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The plate 9 with the pushers 11 and 12 was in motion by initially pushing the casting away from the sprues. In this case, the casting is removed from the rod. 13, the cutting element 18 cleans the blade in the casting hole with a cutting edge. Then, when the ejectors 11 are exposed to the end of the casting, it is separated from the sprues. Upon further movement of the plate 9, the floating ejectors 12, abutting against the pressing plate 10, remove the remaining sprue with the press residue. The mold is then cleaned, lubricated, closed and the casting cycle is repeated.

The described mold design allows to obtain a layer-free casting in the technological cycle of the operation of the mold, which shortens the technological cycle of the production of castings and eliminates the need to use special equipment to remove the casting in the holes of the casting.

Claims (1)

Invention Formula Die casting mold containing a stationary half-form and a movable half-form with a mold installed in it core, different with By the fact that, in order to obtain a layer-free castings, a cutting element is made at the end of the working part of the rod, the cutting edge of which corresponds to the profile of the working part of the rod, and a cavity under the cutting element is made in the fixed half-form. :