CN103861991A - Gypsum mold formula for impeller casting and mixing manufacturing technology - Google Patents

Abstract

The invention discloses a gypsum mold formula for impeller casting and a mixing manufacturing technology. The gypsum mold consists of the components in percentage by weight: 1-5 percent of bauxite, 0-3 percent of zircon power, 1-3 percent of cement, 0-5 percent of talcum powder and the balance being gypsum powder. The technology comprises the following technical process of putting power materials according to a ratio into a material mixing barrel, uniformly stirring the powder materials through a tool, then adding water with the weight being 50-100 percent of the powder materials, stirring and mixing in a stirring machine, and controlling the speed of the stirring machine to be 600-1,200r/min and the stirring time to be 1-3 minutes. A pressurizer impeller manufactured by adopting the gypsum mold formula and the mixing manufacturing technology which are disclosed by the invention is high in size precision and high in surface quality.

Description

A kind of impeller is gypsum mould formula and mixing technique for casting

Technical field

The invention belongs to materials processing moulding manufacturing technology, particularly supercharger impeller aluminium alloy gypsum mould hot investment casting field.

Background technology

At present, domestic in supercharger impeller aluminium alloy gypsum mould hot investment casting field, due to features such as impeller casting dimensional accuracy are high, vane thickness is thinner, complex-shaped, generally all adopt gypsum mould casting impeller, and the formula of gypsum mould and mixing technique are larger to gypsum mould quality influence, to obtaining any surface finish, dimensional accuracy is high, defect is few supercharger impeller is significant.

Summary of the invention

The supercharger impeller that object of the present invention is acquisition any surface finish, dimensional accuracy is high, defect is few, and provide a kind of impeller to cast with gypsum mould formula and mixing technique, the auxiliary material adding in this formula contributes to surface quality and the dimensional accuracy of impeller casting, and the mixing technique adopting is more conducive to the raising of gypsum mould homogeneity.

The technical scheme adopting is:

Gypsum mould formula is used in a kind of impeller casting, it is characterized in that its compositions in weight percentage is bauxite 1-5%, zirconium English powder 0-3%, cement 1-3%, talcum powder 0-5%, and surplus is land plaster.

Gypsum mould mixing technique is used in a kind of impeller casting, it is characterized in that comprising following technical process:

To after the various powder material weighings in proportioning, put into mixing tank, stir with instrument, then add powder to weigh 50%～100% water, stir mixed system on mixer, mixer revolution is controlled at 600～1200 revs/min, and mixing time is controlled at 1～3 minute.

The present invention have formula rationally, the advantage such as technique is simple, not only dimensional accuracy is high to adopt the supercharger impeller of gypsum mould formula of the present invention and mixing technique processing, and surface quality is good.

Detailed description of the invention

Embodiment mono-

It is bauxite 2%, zirconium English powder 1%, cement 1.5%, talcum powder 1%, land plaster 94.5% that gypsum mould formula, its compositions in weight percentage are used in a kind of impeller casting.

Gypsum mould mixing technique is used in a kind of impeller casting, comprises following technical process:

By above-mentioned formula, the various powders of weighing in formula, put into mixing tank, stir with suitable instrument (needing dry) for subsequent use, then add powder to weigh 60% water, on mixer, stir mixed system, mixer revolution is controlled at 800 revs/min, and mixing time is controlled at 2 minutes.

Embodiment bis-

It is bauxite 4%, zirconium English powder 2.5%, cement 2.5%, talcum powder 4%, land plaster 87% that gypsum mould formula, its compositions in weight percentage are used in a kind of impeller casting.

Gypsum mould mixing technique is used in a kind of impeller casting, comprises following technical process:

By above-mentioned formula, the various powders of weighing in formula, put into mixing tank, stir with suitable instrument (needing dry) for subsequent use, then add powder to weigh 100% water, on mixer, stir mixed system, mixer revolution is controlled at 1000 revs/min, and mixing time is controlled at 2.5 minutes.

Claims (3)

1. a gypsum mould formula is used in impeller casting, it is characterized in that its formula is by weight percentage: bauxite 1-5%, zirconium English powder 0-3%, cement 1-3%, talcum powder 0-5%, surplus is land plaster.

2. gypsum mould formula is used in a kind of impeller casting according to claim 1, it is characterized in that its formula is by weight percentage: bauxite 2%, zirconium English powder 1%, cement 1.5%, talcum powder 1%, land plaster 94.5%.

3. a gypsum mould mixing technique is used in impeller casting, it is characterized in that comprising following technical process:

To after the various powder material weighings in proportioning, put into mixing tank, stir with instrument, then add powder to weigh 50%～100% water, stir mixed system on mixer, mixer revolution is controlled at 600～1200 revs/min, and mixing time is controlled at 1～3 minute.