Lost foam casting method of engine gear chamber

Abstract

The invention discloses a lost foam casting method of an engine gear chamber, and relates to the field of casting technologies. The lost foam casting method comprises the following steps of 1, designing models for manufacture of lost foam casting sheets by three-dimensional design software and manufacturing corresponding molds, 2, pouring expandable granules for model manufacture into the molds, heating, cooling to obtain lost foam casing sheets and drying the lost foam casing sheets, 3, bonding the dried lost foam casing sheets into an integral body according to requirements and bonding a casting system on the integral body to obtain a lost foam model, 4, carrying out a dip-coating process on the surface of the lost foam model by a special-purpose coating material and then drying, 5, putting the treated lost foam model into a three-dimensional shaking sandbox, pouring dry sand into the three-dimensional shaking sandbox and covering the surface of the three-dimensional shaking sandbox with a film, and 6, pouring melt obtained by melting treatment into the casting system of the lost foam model so that the lost foam model is melted and melt occupies a space occupied originally by the lost foam model, cooling the melt to solidification, and opening the three-dimensional shaking sandbox and taking out a casting. The lost foam casting method improves production efficiency and reduces labor consumption, a labor cost and a manufacture cost.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a lost foam casting method for an engine gear chamber. Background technique [0002] The engine gear chamber is divided into two parts: the timing gear chamber and the gear chamber cover. The existing casting method is sand casting, and the steps are roughly as follows: ① Manufacture the master mold according to the product drawing and casting requirements; ② Put the master mold in the sand box Inject clay sand and compact it; ③ After mold drawing, molding, drying, and box closing, pour the treated solution into the cavity; ④ After the solution cools, take out the casting and clean it. The castings cast by this method are prone to the following problems. First, due to the poor air permeability and high water content of the clay sand, the castings are prone to pores and leaks due to lack of compact structure. Secondly, the use of manual box closing is prone to misalignment and c...

AI Technical Summary

Problems solved by technology

The castings cast by this method are prone to the following problems. First, due to the poor air permeability and high water content of the clay sand, the castings are prone to pores and leaks due to the lack of compact structure.

Secondly, the use of manual box closing is prone to misalignment and cushioning, resulting in uneven wall thickness and deformation of castings and large reserves for processing.

Furthermore, the use of manual repairs can easily lead to uneven wall thickness and deformation of the casting, and the surface quality is poor, and the box may collapse, resulting in time-consuming and labor-intensive

Therefore, there are a series of shortcomings such as high technical requirements for workers, high labor intensity, long production cycle, low yield rate, and difficulty in mass production.

Images