SU1470451A1 - Apparatus for shaping blanks from plasticized powders - Google Patents

Abstract

This invention relates to the field of powder metallurgy, in particular, to devices for forming plasticized powder blanks. The goal is to increase the productivity of the molding process. The cavity of chamber 1 is filled with plasticized powder. When moving down the perforated piston 2 with the punch - cutter 3, the forming step of the chamber 1 is filled with powder and the press mass is simultaneously mixed with the perforated piston. When the punch-cutter 3 reaches the boundary between the steps of the chamber, the process of forming the blank in the lower (smaller diameter) step of the chamber occurs. The locking element 4 is retracted and the molded workpiece is pushed out, after which the opening of the lower stage is blocked by the locking element. The molding process is repeated. The use of this device improves the performance of the molding process. 1 il.

Description

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The invention relates to metallurgy powders, in particular to devices for forming blanks from plaitified powders.

The purpose of the invention is to increase the productivity of the molding process.

The drawing shows an arrangement for forming blanks.

The device consists of a two-stage chamber 1, a mixing mechanism, made in the form of a perforated piston 2, located in the first (mixing) stage of chamber 1, punch-cutter 3, locking element 4, installed under the second (forming) chamber step.

The movement of the perforated piston 2 with the punch-cutter 3 is performed by the hydraulic cylinder 5, and the locking element 4 by the hydraulic cylinder 6 (or by any known mechanical device).

The device works as follows.

In the initial position, the perforated piston 2 with the punch-cutter 3 is in its extreme upper position, the molding step of the chamber 1 is closed by the locking element 4. The chamber cavities are known and (through KpbmiKy, connector, pipeline) are filled with a press material (plasticized powder)

When the perforated piston 2 moves with the punch-cutter 3 downwards, the forming stage of chamber 1 (estimated volume) is filled with the press mass and the press of the mass is simultaneously mixed with the perforated piston 2. When the punch-section 3 reaches the stage separation boundary

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After the pressure in the hydraulic cylinder 5 is depressed, the locking element 4 is retracted downwards and further movement of the perforated piston 2 with a punch-cutter 3 downward pushes the finished billet out of the forming stage 1 of the chamber to the pad of the locking element 4. Next, the preform is removed by any known method from the surface of the element 4 which then moves up and locks the forming step of chamber 1 again from below. The piston 2 begins to move upwards, with the flow of the press mass in the mixing chamber stage and filling of the forming chamber stage with a new portion of powder. Thus, there was a preparation of a new production cycle of the workpiece. Pressing process. Repeat until the chamber is emptied, after which the chamber is filled by known methods;

When using the proposed device, an increase in the productivity of the billet molding process occurs, since at the stage of forming the billet in the forming stage of the chamber and preparing it for loading with the next portion of powder in the mixing stage of the chamber, the plasticized powder is mixed by the perforated piston.

F o r m ula inventions

A device for forming blanks of plasticized powders, comprising a chamber, a perforated piston, a cutter and a locking element, characterized in that, in order to increase the productivity of the molding process, the chamber

the main cut-off stage is cut off, the press mass perforate from the dosed volume in the forming chamber stage and the pressing process of the workpiece begins, which ends when the specified pressing force is reached.

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The mounted piston is installed inside a chamber of a larger diameter, and the cutter is made in the form of a punch with a diameter equal to the inner smaller diameter of the chamber, and is fixed to the lower end of the piston.

The mounted piston is installed inside a chamber of a larger diameter, and the cutter is made in the form of a punch with a diameter equal to the inner smaller diameter of the chamber, and is fixed to the lower end of the piston.

Claims (1)

Claim' A device for molding preforms of plasticized powders containing a chamber, a perforated piston, a cutter and a locking element, characterized in that, in order to increase the productivity of the molding process, the chamber is made stepwise, and the perforated piston is installed inside the chamber of a larger diameter, and the cutter is made in the form of a punch with a diameter equal to the inner smaller diameter of the chamber, and mounted on the lower end of the piston. Iokiyansky Tehred A. Kravchuk Order 1416/13 Circulation 710 Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR · 113035, Moscow, Zh ~ 35, Raushskaya nab., D. 4/5 Proofreader M. Samborskaya Production and Publishing Plant Patent, Uzhgorod, st. Gagarina, 101