SU1006042A1 - Pulse head - Google Patents

Abstract

PULSE HEAD FOR the manufacture of casting molds, comprising a housing with a working cavity. in the lower part of which the valve and the electromagnetic mechanism of its movement are strengthened, characterized in that, in order to reduce dynamic loads and reliability, it is equipped with permanent magnets and seals made of magnetic elastic elastic material, and seals and permanent Magnets are installed each other in the valve under the electromagnetic movement mechanism. S (About with About About 4

Description

The invention relates to foundry production, in particular, devices for making and knocking out forms with compressed air.

Iseest pulse head, comprising a housing with a working cavity, in the lower part of which a valve is fixed and the drive of its movement flj.

The disadvantages of the design of such a pulse head are low reliability and dc1 due to the large dynamic loads from the shock wave of compressed air that are rigidly transferred by the valve to the levers, the stops, the slide rod and the drive itself, which leads to their rapid deterioration, in addition to sealing in the valve practically not fixed, therefore, after each pulse, the tightness of the valve is blocked by the working cavity, the head goes out of order and needs repair. Large dimensions in height due to the placement of the stops and the actuator on the upper surface of the body of the pulse head. In addition, in this design of the impulse head, the issue of the docking of the impulse head with the filling frame is not resolved.

Closest to the proposed technical essence and the achieved effect is a pulse head, comprising a housing with a working cavity, in the lower part of which a valve is fixed and an electromagnetic mechanism for its movement 2.

The purpose of the invention is to reduce the dynamic loads and increase the reliability.

The goal is achieved by the fact that the pulse head / housing with a working cavity in the lower part of which a valve is fixed and an electromagnetic mechanism for its movement is provided with permanent magnets and seals made of a magnetic elastic elastic material, and the seals and permanent magnets are mounted each other in the valve under the electromagnetic displacement mechanism.

FIG. 1 shows a general view of a pulse head, a section with the holes of the divider closed; on ig. 2 - placement of magnets in the diverter and valve; in fig. 3 o the same, in the valve under the seals.

The pulse head contains a corus 1 with a working cavity 2, in the lower part of which the divider 3 is fixedly fixed, which is a plate with holes 4 made of a nonmagnetic material. Electromagnets 5 connected to a direct current source are placed in the divider 3, under the divider 3 there is located a valve b with openings 7 in the form of a movable perforated ferromagnetic plate, in which permanent magnets 8 are placed, and seals 9 made of elastic elastic material, such as magnetic rubber, under which permanent magnets are placed 10. Valve 6

is elastically connected with the divider 3 by means of springs 11, each of which is freely supported at one end on the divider 3 and the second is connected with rods 12, placed

with the possibility of free vertical movement in the guide holes 13 of the splitter 3 and fixed in the valve 6.

Pulse head works as follows

The electromagnets 5 are supplied with current from the direct current source, while the electromagnets 5 interact with the permanent magnets 8 located in the valve b, which is attracted to the divider 3, sealing the working cavity 2.

In the working cavity 2 serves compressed air. To effect a pulse, the electromagnets 5 are switched off and immediately

they are connected to a power source of opposite polarity. In this case, the force of action of the magnetic valve b and the splitter 3 changes in direction, the valve b is repelled from the splitter 3 and the compressed air through the openings 4 and 7 of the splitter 3 and the valve b rushes into the tooling and compresses the molding mixture in it. With

the impulse of the spring 11 under the action of the forces of repulsion of the magnets and the action of compressed air on the valves b are compressed, elastically transferring the dynamic load of the shock wave of compressed air to the divider 3 due to. which increases the reliability and durability of the pulse head.

The electromagnets 5 are disconnected from the current source and the spring 11 returns the valve b to its original position

and the pulse head is ready for the next cycle.

The proposed design allows to reduce the size of the pulse head due to the implementation of the drive

valve in the form of interacting magnets placed in the valve and the divider, to increase its durability because the valve is connected with the divider elastically, due to which a reduction of the shock wave of compressed air to the structural elements of the pulse head is achieved.

Claims (1)

PULSE HEAD for the manufacture of foundry molds, containing a * housing with a working cavity. in the lower part of which the valve and the electromagnetic mechanism of its movement are strengthened, characterized in that, in order to reduce dynamic loads and increase reliability, it is equipped with permanent magnets and seals made of magnetic elastic material, and seals and permanent magnets are mounted under each other in valve under the electromagnetic mechanism! ” Movement.