Quadruple valve body casting and mold thereof

Abstract

The invention discloses a quadruple valve body casting. The quadruple valve body casting comprises a valve body, a transverse runner, longitudinal runners and a runner port. The valve body is in a cuboid shape. The longitudinal runners comprise the first longitudinal runners and the second longitudinal runners which are all of pipe-shaped structures. Cavity bodies are perpendicularly arranged on the second longitudinal runners, and the lower end of each cavity body is an opening. The invention further discloses a mold of the quadruple valve body casting. The mold comprises a shell mold body and a sand core. The sand core is assembled and formed by a main sand core body and a plurality of small sand core bodies. The main sand core body is formed by assembling a plurality of sand core bodies. Graphite arbors are placed in the main sand core body. Exhaust holes are formed in the two ends of the main sand core body and communicate with small sand core holes and main sand core holes. According to the quadruple valve body casting, the interiors of the runners are smooth, the runners in the casting are free of fash, and the sand core bodies are free of cracks; and the poured casting is smooth in appearance and free of pore defects, and the qualified rate of the casting reaches 95% or above.

Description

technical field [0001] The invention relates to the field of valve body castings, in particular to a valve body casting of a quadruple valve and a mold thereof. Background technique [0002] Multi-way valve products are mainly used for supporting various hydraulic pumps, and are widely used in various mechanical hydraulic systems. At present, the level of development at home and abroad is comparable, and the advantages of foreign products are reflected in their long service life. At present, similar domestic castings have poor precision and low technical content, and domestic high-end hydraulic components have long relied on imports. [0003] At present, the multi-way valve body castings have always been difficult to cast. The internal flow channel design of the valve body must meet the design requirements, and it must be able to be successfully cast. The main hole is broken during casting, the main hole is bent, and the straightness is greater than 0.6mm. Problems such as...

AI Technical Summary

Problems solved by technology

The four-way valve body and the five-way valve body of the imported high-pressure multi-way valve products are made of countless curved surfaces, and the walls are relatively thin, so it is difficult to manufacture. The reason is that the cavity of the casting is complicated and the sand mold processing is difficult. No substantial breakthrough has been made in the manufacturing technology of such thin-walled products.

The development of the domestic valve industry should move forward in the direction of high-end modernization. At present, in the casting process of valve body castings, the sand core is easy to crack, and the temperature is low during the pouring process, which easily leads to pore defects in the castings, and the finished valve castings have uneven density. , and prone to cracks, the scope of application is limited

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