Mold shell cooling device after wax mold dewaxing

Abstract

The mold shell cooling device comprises a box body, a plurality of cooling bins used for cooling a mold shell are arranged on the box body at intervals, a cross beam is arranged on the upper portion of the box body, and a plurality of sealing covers matched with openings of the cooling bins in a one-to-one correspondence mode are arranged on the lower portion of the cross beam; the two opposite sides of each cooling bin are correspondingly provided with an air inlet channel and an air outlet channel, the sealing cover is provided with a communicating channel correspondingly communicating with the air inlet channel and the air outlet channel, the two opposite side faces, corresponding to the two ends of the communicating channel, of the sealing cover are each provided with a first wedge-shaped face, and the two opposite sides of an opening of each cooling bin are each provided with a second wedge-shaped face. The first wedge-shaped face and the second wedge-shaped face are matched to achieve sealed communication of the air inlet channel, the communication channel and the air outlet channel. The purpose of finally and uniformly cooling and shrinking the wax mold is achieved, the dimensional precision of the wax mold after cooling is guaranteed, the problem of mold shell deformation caused by chilling by direct contact between cooling water and the mold shell is avoided, and the cooling efficiency of the mold shell after high-temperature dewaxing of the wax mold is improved.

Description

technical field [0001] The invention relates to the technical field of investment casting, in particular to a mold shell cooling device after the wax mold is dewaxed. Background technique [0002] In the production process of investment castings, it is first necessary to prepare corresponding wax patterns according to the shape and size of casting products. With the continuous development of casting technology, the shape and structure of wax patterns are becoming more and more complex. The dimensional accuracy of the corresponding shapes and structures on wax patterns It has a great influence on the corresponding shape and structure size of the final casting. Since the material for preparing the wax mold is mostly wax material, after the wax mold is dewaxed, the wax mold is easy to shrink due to heat exchange with the external environment. Different materials The shrinkage rate of the wax mold is different, and due to the different shape and structure of the wax mold, the co...

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Problems solved by technology

[0002] In the production process of investment castings, it is first necessary to prepare corresponding wax patterns according to the shape and size of casting products. With the continuous development of casting technology, the shape and structure of wax patterns are becoming more and more complex. The dimensional accuracy of the corresponding shapes and structures on wax patterns It has a great influence on the corresponding shape and structure size of the final casting. Since the material for preparing the wax mold is mostly wax material, after the wax mold is dewaxed, the wax mold is easy to shrink due to heat exchange with the external environment. Different materials The shrinkage rate of the wax mold is different, and due to the different shape and structure of the wax mold, the cooling shrinkage process and cooling shrinkage speed of the corresponding parts on the wax mold are also different, resulting in deformation of the wax mold, which affects the corresponding parts of the final casting. Dimensional accuracy

After the existing wax mold is dewaxed at high temperature, the mold shell is put into water for cooling, and the cooling water directly contacts the mold shell. Due to the difference in the temperature of the cooling water, and the local thickness of the mold shell is inconsistent, due to the local cooling of the mold shell and the shrinkage rate The difference caused the wax mold to deform after cooling, which in turn affected the dimensional accuracy of the casting. In addition, after being cooled by cooling water, it needs to be dried after being taken out. When soaking in cooling water, the wax mold will also have the problem of slag falling, which will affect the follow-up operation and work efficiency. Low

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