SU1315136A1 - Die-casting mould for moulding metal powder - Google Patents

Abstract

This invention relates to molds for forming metal powder. The purpose of the invention is to expand the technological capabilities of the mold by obtaining equally-dense products with plane-parallel ends made at an acute angle to the generators. When a force is applied on the compensating wedges 4, the latter, through the guides 5, change the direction of the pressing force and move the punches 1 and 2 into the die 3 towards each other at an acute angle to the supporting ends of the wedges. 1 il. (L with JV with O5

Description

11315136

The invention relates to powder metallurgy, in particular to press molds for forming metallic

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powder, and can be used to obtain products like solder plates of cutters for processing wooden parts of window blocks.

The purpose of the invention is to expand the technological capabilities of the mold by producing uniformly dense products with plane-parallel ends made at an acute angle to the generators.

The drawing shows a mold in a press position. The mold has a lower 1 and upper 2 punches, a die 3, compensating for wedge 4 and sending 5 rolls. The mirror of the matrix 6, the forming ends of the 7 punches 1 and 2, as well as the support planes 8 of the compensating wedges 4, are made at an acute angle p to the matrix generators.

The mold works as follows.

The lower punch 1 is introduced into the die 3, after which the powder is loaded. An upper punch 2 is introduced into the matrix 3 and a pressing force is applied to the punches through compensating wedges and rolling guides, after which the product is extruded from the cavity of the matrix 3. effort The angle d between the pressing force and the reaction force of the forming ends of the punches must be less than or equal to

Op G.Volkov 2239/9

Compiled by A.Naimushin Tehred L.Oliynyk

Cor Pod

Circulation 740 VNIIPI USSR State Committee

for inventions and discoveries 11-3035, Moscow, Zh-35, Rautlska nab, d, 4/5

. Production and polygraphic enterprise, Uzhgorod, Projecto st., 4

five

0

five

0

five

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Lt friction angle between the ends of the punches and the moldable mass.

If the angle is about more than the friction angle, then when a force is applied to the punches, there appears a slip of the formable mass relative to the ends of the paunsons. This leads to a movement of mass in the direction perpendicular to the applied force, which does not allow obtaining a uniform density over the product section, and also leads to the appearance of stratified cracks during the extrusion of the product.

Such an arrangement of the mold elements in the process of filling and pressing the powder allows to obtain a product of the proposed design with a uniform density over the cross section.

Claims (1)

Invention Formula A mold for forming a metal powder, comprising a die and upper and lower punches, is characterized in that, in order to expand the technological capabilities of the mold by obtaining equal parts with plane-parallel ends, made at an acute angle to the shapes, it is equipped with compensating wedges installed by means of rolling rollers on the supporting ends of the punches, the die and punches are installed with an inclination relative to the supporting surfaces of the wedges, while the planes of the forming faces in punches, made at an acute angle to the forming matrix. Proofreader I.Musk Subscription