SU1585065A1 - Mechanism for moving top plate - Google Patents

Abstract

This invention relates to foundry, in particular, to low pressure casting and die casting machine designs. The aim of the invention is to increase the reliability and safety of operation. In the bottom cover 8 of the transfer mechanism, a rod 9 is installed on the floor, located in the hollow stem 7, pressure 10 and check valve 11. The valve 10 is set to pressure, which makes it impossible to spontaneously lower the movable plate 3. If the tightness of the hydraulic cylinder body or supply pipelines is impaired, the valve 10 blocks the working fluid in the hollow shaft 7, which prevents the spontaneous lowering of the plate 3. 1 sludge.

Description

This invention relates to a foundry, in particular to machine designs for floor casting in low pressure and in chill.

The purpose of the invention is to increase the reliability and safety of work.

The drawing shows the mechanism for moving the upper plate.

The mechanism includes a base 1, a hydraulic cylinder 2 attached to the base 1, a movable plate 3 with guide rods 4 and 5 fixed to it, moving in the sleeves of the base 1, traverse 6 connected to 15 rolling pins 4 and 5 and Hollow stem 7 drive cylinder 2. A cover 8 with a hollow rod 9, located in the hollow rod 7, is integrated into the case of the hydraulic cylinder 2, and the cover 20 with a hollow rod 8 is equipped with a pressure 10 and a check valve 11.

The mechanism works as follows.

The working fluid pressure is supplied to the cavity A of the drive cylinder 2 and through the check valve 11 to the cavity B of the hollow stem 7 and the hollow rod 9. After filling the cavity B with the working fluid, pressure from cavity A 30 is released and pressure valve 10 is set to cavity B, which makes it impossible to spontaneously lower the movable plate 3 together with the guides 35 rolling pins 4 and 5, the cross member 6, the hollow rod 7 and the part of the casting tool attached to the movable plate 3 from their own weight. A check valve 11 blocks the passage of the working bone from the cavity B to the cavity A.

When the pressure of the working fluid is supplied to the cavity B of the hydraulic drive cylinder 2, the pressure of the working fluid in the cavity C increases, overcomes 45

setting of the pressure valve 10, the movable plate 3 is lowered together with a part of the casting tool fixed to it;

When lifting the movable plate 3 with a part of the casting tool, the pressure of the working fluid, equal to the weight of the moving parts, is fed into the cavity L and through the check valve 11 fills the cavity B, the working fluid from cavity B is drained.

If the pressure in cavity A is lost, in case of rupture of the casing of the driving cylinder 2 or the supply pipeline, the movable plate 3 with a part of the casting tool cannot fall down, since the cavity B filled with the working fluid is blocked by the return 11 and the pressure 10 valves.

The movement of the upper plate provides increased reliability and safety of operation of the machine for a year with low pressure.

Claims (1)

Invention Formula The mechanism for moving the upper plate, predominantly under low pressure, contains a base, a yoke, connected by means of guide skalok to the upper plate, a hydraulic cylinder, the body of which is fixed to the base, and the rod - on the yoke, characterized in that safety, it is equipped with a rod with an axial channel fixed on the cylinder lid and placed in the stem, non-return and pressure valves, while in the rod there is a cavity connected to the piston cavity pa through the channel in the bar and the return and discharge valves.