SU1217573A1 - Injection mould - Google Patents

Description

The invention of powders metallurgy, in particular for the calibration of sintered billets, and can be used to obtain products of complex,

The purpose of the invention is the extension. technological capabilities of the mold.

Fig. 1 shows a mold at the time of loading the preform and the closure of the molding cavity; 2, the completion of the molding process; figure 3 - removing the finished product

The mold consists of a lower fixed punch 1 supported on the support ring 2, a lower movable punch 3 fixed in the punch holder 4 mounted on the lower plate 5, a rod 6 located in the lower movable punch 3 located in the lower semi-matrix 7, the upper half-matrix 8, into the channel of which movable punches 9 and 0 are inserted, inside which rod i1 is located, supported by a shank on an elastic element 12, is located in a rack 3 mounted into a stack-shaped support 14 fixed by flange I5 in the top It plate 16. The cup-shaped support 14 is mounted to the bottom of exposure to non-working ends verhnyus movable punches 9 and O, and the ends of the walls - with an elastic member 17 disposed in an annular cavity 18 formed in the upper jaws 8.

The mold works as follows.

During the loading of the workpiece, the upper plate 16 and the upper semi-matrix 8 with all intermediate elements move upward and occupy the uppermost position. In this case, the upper movable rod 1 and the upper half-matrix 8 are pressed down by elastic elements 12 and 17. The upper movable punches 9 and 10 are in a free state. The lower movable punch 3 rises to the level of the mirror of the lower half-matrix 7 by a command from npeccs. and a pre-sintered preform is fed to its working end (FIG.).

During the course of the lower support 14 and the upper rod 11 deformirupet elas

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tichnye elements 12 and 17, which increase the compressive force of the semi-matrix 7 and 8 and the rods 6 and 11, and also provide movement of the punches 5 and 9 relative to the upper semi-matrix 8. As the size of the pre-sintered workpiece approaches the specified dimensions and shape of the part, the compression force of the molds and the cores increases and the moldable material fills the desired shape without leaking into the slot cavity (Fig. 2).

After the process of deforming the pre-sintered billet is completed, the top plate 16 and the upper half-matrix 8 with intermediate elements go up.

The upper movable rod 11 is pressed by the elastic element 12 to the extreme lower position, not allowing the pressed part to remain in the upper half-matrix 8.

The lower movable punch 3 from the press drive rises and pushes the part from the lower half-matrix 7. The part is removed (Fig. 3). Then the cycle repeats. Loading and removal of parts can be carried out manually, if the work is performed on single strokes of the press. Or automatically using a feeding device.

The presence in the mold of an elastic element allows you to close the two molds of the matrix before starting to form the workpiece, create a closed cavity for pressing and simultaneously provide movement of the upper punches. The force transfer from the press to the plane of the connector of two semi-matrix and the upper punches through the glass also contributes to this - a figurative support, which is supported by the walls on the elastic element, and the bottom on the upper punches.

Press the semi-matrix into the force, the higher the lower the upper plates, which excludes the possibility of the sintered material of the blanks falling into the plane of the crawl / -matrices.

The proposed press-forgy design allows to obtain parts of complex shape with a significant redistribution of the mass of the material of the workpiece, for example, parts with a double-cone and spherical surface, a surface with a complex professional opening of 5 and 6 difficulty groups.

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Compiled by A.Tumanov Editor I.Kasarda Tehred t, Dubinchak Proofreader V.Sinitska

1037/16 Circulation 757 - Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

FIG.

Claims (1)

PRESS-FORM, including the upper plate, matrix, rod and forming punches installed in the punch holders, characterized in that, in order to expand the technological capabilities of the mold, it is equipped with a glass-shaped support and an elastic element, the matrix is made in the form of two mating horizontally of the half-matrix connector, the upper half-matrix is made with an annular cavity, the elastic element is placed in the specified cavity, and the cup-shaped support is installed with the possibility of interaction with the bottom with a slave with the ends of the upper punches, and with the ends of the walls - with an elastic element. th m sl m CO 1 I 21