SU1284690A1 - Apparatus for centrifugal shaping of powders - Google Patents

Abstract

The invention relates to institute devices for centrifugally molding articles from powder. When the housing 1 rotates, the inertia force flows from the loading cavity 2 along elastic radial feeders 3 into the matrices 4. The roller on the double-arm lever 7 rolls along the profile of the cam 6 and, under the action of the spring 9, the striker 8 periodically imparts a shock pulse to the matrices 4. Spring 5 provides the return matrix in the extreme peripheral position. As a result, the matrix with the powder makes polyharmonic vibrations, which causes the destruction of the arch structures and an increase in the density and uniformity of its distribution in the compact. 1 tab., 2 Il. sg

Description

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The invention relates to powder metallurgy, in particular, to devices for centrifugally molding articles from powder.

The purpose of the invention is to improve the quality of products.

Figure 1 shows the device, General view; figure 2 is the same, top view.

The device consists of a housing 1 with a loading cavity 2 installed on it, which by means of elastic radial feeders 3 is connected to the dies 4 for compacting the powder, provided with springs 5 for holding the dies in an extreme position at the periphery of the housing. The frame of the housing 1 is equipped with a hammering cocking mechanism, including a cam 6 and a two-arm lever 7, one shoulder of which with a roller interacts with the cam 6, and the other 8 is fixed to the hammerhead 8, pressed by the spring 9.

The device works as follows.

When the housing 1 rotates, the powder nod by the action of inertial forces comes from the loading cavity 2 through the radial feeders 3 into the matrices 4 for compaction. At the same time, the roller on the lever 7 rolls along the profile of the cam 6, the striker 8 and the spring 9 are brought to their initial position, and after the roller falls off the cam ledge, then under the action of the spring 9, the hammer 8 strikes the end of the form 4 body and reports her shock momentum. The spring 5 provides for the return of the matrices 4 to the extreme peripheral position. By selecting the mass of the striker 8 and the rigidity of the spring 9, the frequency of rotation of the matrices and the frequency of collisions are controlled. As a result of the periodic impact of the impactors on the dies with the powder, the latter make polyharmonic oscillations, which causes the destruction of the arch structures and an increase in the density and uniformity of its distribution in the compact.

The results of comparative tests of the known and proposed devices are shown in the table.

Claims (1)

Invention Formula A device for centrifugal molding of powders, including a body with a loading cavity, radial feeders, dies and spring-loaded impactors, characterized in that, in order to improve the quality of the products, it is equipped with a hammer charging mechanism, the dies are spring-loaded and mounted with radial movement, and the feeders are made elastic.