SU1764777A1 - Pulsating head - Google Patents

Abstract

Usage: in the foundry industry, in particular in devices for compacting sandy-clay mixtures. SUMMARY OF THE INVENTION: The piston actuator stem, on which the valve is fixed, is made of two parts mounted telescopically, with the lower part of the stem located with a gap relative to the walls of the upper part and having a T-shaped head, and windows in the side walls of the upper part. 1 il.

Description

The invention relates to foundry, in particular, to the compaction of disposable molds from sandy-clay mixtures.

The purpose of the invention is to increase the efficiency of the pulsed effect on the mixture by increasing the valve opening speed.

This goal is achieved by the fact that the rod is made of two parts mounted telescopically, with the lower part of the stem located with a gap relative to the walls of the upper part and having a T-shaped head, and windows are made in the side walls of the upper part

Increasing the valve opening speed is done without increasing the mass of the moving parts

The drawing shows a cross section of a pulse head.

The impulse head contains a receiver 1 with an exhaust port 2, an overlapping air valve 3 with a piston drive 4 and a piston drive 4 with a piston 5. Valve stem 6 of valve 3 is made of two

parts mounted telescopically, and provided with windows 7 for the free discharge of air from the cavity of the rod. The rod end of the piston actuator communicates with the receiver.

Pulse head works as follows.

The air valve 3 blocks the exhaust port 2, the piston 5 is in the lower position. Vessel 1 is filled with compressed air until the operating pressure is reached. The pressure above the piston 5 is released. Under the action of the working pressure in the receiver 1, the piston 5 goes up, gradually accelerating. Valve 3 at the same time continues to block the exhaust port 2 under the influence of working pressure in receiver 1. To reduce air resistance to the movement of rod 6 and prevent air cushion in the rod, windows 7 are provided. Piston 5 passes the acceleration path and, acquiring sufficient speed, opens the valve 5 s high initial speed, reduces opening time, increases effects

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Claims (1)

Claim A pulse head comprising a receiver with an exhaust outlet ^ a piston 5 actuator mounted on the receiver and a valve fixed to the piston actuator rod, characterized in that, in order to increase the pulse effect on the mixture by increasing the valve opening speed, the rod is made of two parts mounted telescopically, with the lower part of the stem located with a gap relative to the walls of the upper part and has a T-shaped holo15 taste, and windows are made in the side walls of the upper part.