Mould capable of preventing cold shrinkage for excavator shovel head tip precision casting

Abstract

The invention discloses a mould capable of preventing cold shrinkage for excavator shovel head tip precision casting. The mould comprises an upper mould body and a lower mould body; an upper mould groove is formed in the middle of the upper mould body, and a demoulding ring is sleeved with the inner side wall of the upper mould groove; a lower mould groove is formed in the middle of the lower mould body; a jacking plate is slidably connected to an inner cavity of the lower mould groove; a hydraulic oil inlet channel is formed in the front side wall of the inner cavity of the lower mould groovein a penetrating mode; and a lower wax channel and an upper wax channel are mutually buckled. Through using of the jacking plate and the hydraulic oil inlet channel, when external wax is led into thelower mould groove and the upper mould groove, the hydraulic oil inlet channel is connected with an external hydraulic pump, and thus hydraulic oil enters the bottom face of the jacking plate to prevent cold shrinkage deformation of a wax mould; and meanwhile, through using of the demoulding ring, the function of convenient mould drawing is achieved.

Description

technical field [0001] The invention relates to the technical field of casting molds, in particular to an anti-cold shrinkage mold for precise casting of excavator shovel tips. Background technique [0002] The tip of the excavator shovel is usually cast, but the old-fashioned sand casting is time-consuming and labor-intensive because of the large tolerance, so people began to use precision casting to cast the tip of the excavator shovel, and the old-fashioned precision casting mold was used because of the wax block when making the wax model. It has the property of thermal expansion and contraction, which leads to the problem of cold shrinkage grooves in the middle of the produced wax film. Therefore, the appearance of the excavator shovel tip made by using this old-fashioned mold is extremely irregular, and the old-fashioned mold is making the wax film. It is extremely difficult to draft the mold at the same time, which wastes a lot of working time of the workers. Therefore...

AI Technical Summary

Problems solved by technology

[0002] The tip of the excavator shovel is usually cast, but the old-fashioned sand casting is time-consuming and labor-intensive because of the large tolerance, so people began to use precision casting to cast the tip of the excavator shovel, and the old-fashioned precision casting mold was used because of the wax block when making the wax model. It has the property of thermal expansion and contraction, which leads to the problem of cold shrinkage grooves in the middle of the produced wax film. Therefore, the appearance of the excavator shovel tip made by using this old-fashioned mold is extremely irregular, and the old-fashioned mold is making the wax film. It is extremely difficult to draw the mold at the same time, which wastes a lot of working time of the workers. Therefore, we have proposed a mold for the precision casting of the tip of the excavator shovel to prevent cold shrinkage.

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