A sand box for gate valve casting

Abstract

The invention discloses a sand box for gate valve casting, and relates to the field of sand mould casting. The sand box for gate valve casting comprises an upper sand box, a lower sand box, an insertion plate I and an insertion plate II, wherein an upper cavity is formed in the upper sand box; an upper core is arranged in the upper cavity; a lower cavity is formed in the lower sand box; a lower core is arranged in the lower cavity; an upper location block is arranged at the left side of the upper sand box; an upper location plate is arranged at the right side of the upper sand box; a lower location plate is arranged at the left side of the lower sand box; a lower location block is arranged at the right side of the lower sand box; a groove is formed in the left side of the lower location plate; a plurality of circular holes are formed in the groove; a plurality of cylindrical bulges are arranged at the lower end of the insertion plate I; the lower end surface of the insertion plate I isclamped with the lower location plate; an opening is formed in the right side of the upper location plate; a limit plate is arranged at the upper end of the insertion plate II; and the insertion plate II slides in the opening. The sand box for gate valve casting ensures the integrity in the case that the cores are taken out, so that the cavities are protected, and the production efficiency is increased.

Description

technical field [0001] The invention relates to the field of sand casting, in particular to a sand box for gate valve casting. Background technique [0002] The gate valve is a gate of the opening and closing part. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate, and usually the sealing surface will be surfacing with metal materials to increase wear resistance. There are rigid gate valves and elastic gate valves. According to the different gate valves, gate valves are divided into rigid gate valves and elastic gate valves. [0003] For large-scale gate valves, manufacturers usually use sand casting to cast them. In the selection of the parting surface of the gate valve sand box, a horizontal parting surface is used, that is, the shape of the circular nozzle is not dest...

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Problems solved by technology

[0003] For large-scale gate valves, manufacturers usually use sand casting to cast them. In the selection of the parting surface of the gate valve sand box, a horizontal parting surface is used, that is, the shape of the circular nozzle is not destroyed. The advantage of this method is that the parting is simple and the casting is easy. However, when the sand core needs to be taken out in this casting method, it needs to be taken out from the top so that the left and right deviations cannot occur, so that the mold cavity and the sand core will not be damaged, ensuring The sand core can be used many times, but due to various reasons, it is difficult to ensure that there will be no left-right deviation between the upper and lower sand boxes when unpacking the sand mold.

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