SU562383A1 - Device for pressing metal powders - Google Patents

Description

the drawing is not shown) is tightly pressed to the bottom plate /. The crackers 8 and the plungers 7 are in the initial position (shown in Fig.), The ejector 6 is in the lowest lower position. In the cavity formed by Interstop 13 and 14, as well as with breadcrumbs 8, a preform is pressed into a pressed billet of metal powder heated to a predetermined temperature. A press is turned on, the slider of which, when moving down, alternates plate 2 with punch 5. When the billet is deformed by the punch, the Material begins to flow into chambers B by pressing the crackers with plungers to the periphery of the plate. The fluid in the cavities of B and KA of B is compressed and, as soon as the pressure of this fluid exceeds the opening pressure of valve 10, the latter opens and the fluid enters the filling chamber 9. The check valve // is closed at this time.

After the extrusion process is completed, the top plate with a punch 5 is stirred up, the plate 3 is moved along with this plate. After they are moved to the uppermost position, the ejector 6 operates and removes the pressed product from the cavity of the insert 13. After removing the product plate 3 goes down {for example, by means of power hydro-cylinders, which are not shown in the drawing) and by means of clamps (for example, the above-mentioned hydrocyline (wood) is pressed to the plate). Fluid from chamber 9 through the check valve 11 enters channels B through channels B of B, moving

at the same time plungers 7 with breadcrumbs 8 to the center of the plate.

The device is ready for the next cycle.

The back pressure force in the lateral cavities B is set depending on the technological requirements of the pressure relief valve 10.

The use of the proposed device allows to obtain products of complex shape (for example, products with lateral spikes) with high physical and mechanical properties and uniform density.

Form} l and inventions

A device for pressing metal HOpomiKOB, including upper, intermediate and lower plates, guide columns, punch and ejector, characterized in that, in order to improve the quality of compressed products of complex shape, it is equipped with a chamber for the working fluid, and the bottom plate is made with cavities and channels connecting the cavities with the chamber; the cavities are provided with plugs and breadcrumbs, and the channels are provided with safety and non-return valves.

Sources of information taken into account in the examination.

1. Authors' certificate of the USSR №307847, M. Kl.2 V 22 F 3 / .02, 1968.

2. Edward M.S. Stamping in closed stamps. L., “Mashmstroenie, 1971. with. 146-147.

) 5 g 8