A Surface Treatment Process of Silica Sol Wax Model for Valve Castings

Abstract

The invention relates to a surface treatment process for a silica sol wax mold of a valve casting. According to the surface treatment process for the silica sol wax mold of the valve casting, the following surface treatment device for a silica sol wax mold is adopted, and the surface treatment device for the silica sol wax mold comprises a bottom plate, a sol liquid box, a support table, a guide slide column, a slide column support plate, a movable frame and a locking mechanism; the locking mechanism comprises a support sleeve, a rotary shaft, a rotary motor, a rotary support plate, a lockingsleeve, a bonding plate and a bonding spring. The surface treatment process for the silica sol wax mold of the valve casting comprises the following steps: S1, production for the wax mold; S2, preparation for a silica sol coating; S3, locking for the wax mold; S4, slurry soaking for the wax mold; S5, sand scattering for the wax mold; and S6, forming for the wax mold. The surface treatment processfor the silica sol wax mold of the valve casting is capable of solving the problem of large deviation of the thickness of the wax mold, which is caused by a poor slurry soaking effect for the wax mold, due to that the corners of the wax mold are soaked with less slurry during slurry soaking, and the slurry soaking for the wax mold is non-uniform, in existing slurry soaking and sand scattering operation for the wax mold.

Description

Technical field[0001]The present invention relates to the field of casting and processing, and in particular, to a surface treatment process for a valve casting silica sol.Background technique[0002]Wax mold casting is also known as a downg casting or molten casting, and wax mold is cast, and there are many advantages: can produce complex castings, can make small hole thin-walled parts; suitable for various metals and alloys; high manufacturing precision. Wax mold casting is used in a variety of valves, hydraulic connectors and other precision components for production casting.[0003]Wax mold casting needs to make a model with wax material, and weld the model to the casting port of the flank, in the model surface, refractory coating (mixture of silica sol with fine sand), then sprinkle fire Sand, slurry, sprinkle to repeat, so that the sand layer is sufficiently thick), after drying, the module is heated, and the wax material is taken out from the casting mouth, forming an empty shell...

AI Technical Summary

Problems solved by technology

[0004] 1. When the wax pattern is dipped, the corners are less stained with paste, and the wax pattern is not uniformly stained, resulting in poor staining effect of the wax pattern, resulting in a large deviation in the thickness of the wax pattern;

[0005] 2. The dipping and sanding operations of the wax model cannot be carried out coherently, which makes the production efficiency of the wax model low, and the wax model cannot be rotated uniformly when sanding the wax model, resulting in poor sanding effect of the wax model

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