SU561608A1 - Built-in press mechanism to the molding machine - Google Patents

Description

one

The invention relates to the field of foundry, in particular to a shaking-pressing mechanism.

A shaking-pressing mechanism is known, which contains shaking and pressing piston drives mounted coaxially over each other, and a spring-loaded drummer, which serves simultaneously as a cylinder of shaking piston drive 1.

However, the known mechanism does not provide a smooth transition when changing its mode of operation.

The purpose of the invention is to increase the smoothness of the transition when the mode of operation of the mechanism. For this, the latter is provided with an abutment fixed on the lower end of the shaking head and a shock absorber mounted on the end of the press of the press piston drive for interacting with the abutment.

The drawing shows a shaking-stress mechanism in section.

The injection-pressing mechanism contains a base 1, on which a press 2 and shaking 3 piston drives and a spring-loaded drummer 4 are installed.

Built-in press mechanism works as follows.

Compressed air from the air distributor 5 through the channel 6 enters the cavity 7. When

Thereby, the piston 8 with the working table 9 rises and the hammer 4 lowers, compressing the spring 10. After the table 9 and the drummer 4 have traveled the path determined by the setting of the air distributor 5, the latter turns off the compressed air supply and connects the cavity 7 to the atmosphere. As a result, the pistol 8 with the table 9 is lowered under the action of a force, and the hammer 4 under the action of the compressed

Springs 10 are mean towards table 9. When they meet, the impact occurs, while the shaking-pressing mechanism operates in the mode of pure shaking without harsh blows of the pin 8 on I.

The pressing with simultaneous pressing is carried out as follows.

Compressed air is fed under the pressure plate (not shown) of the press drive actuator 2.

The rod 11 lifts the plate 12, lying freely on the flange 13, the spring-loaded drummer 4 and the work table 9 with the model-mold tooling filled with the molding sand until the latter is in contact with the press

a block. The shaking process takes place as described above. After contact of the molding mixture with a press block, the movement of the working table 9 is limited, and with further movement of the rod 11

between the stop 15 and the shock absorber 16 is selected, and the shock load from the piston 8 to the rod I. is softened.

Since the supply of compressed air to the cavity 7 does not stop, the shaking process continues. However, unlike the clean shaking process, the worktable 9 with the piston 8 does not move, only the hammer 4 is mixed.

In order to maintain the force, acting from the side of the springs 10 on the hammer 4, during pressing, part of the springs is brought out of contact with the hammer 4 by lowering the plungers 17, which are lowered due to the gradual flow of oil through the throttle (not shown). The oil outflow time is determined by the setting of the throttles and must be matched to the pressing time. Turning on the oil drain comes from an electromagnet (not shown), at the initial moment of pressing.

Claims (1)

1. Japanese patent number 492656, cl. In 22C 15/30, 1974.