Soluble mold core and preparation method thereof
A core, polyethylene glycol technology, applied in the direction of cores, casting equipment, casting molds, etc., can solve the problems of soluble cores that are not suitable for high-quality castings, low strength, and pollute the environment.
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Examples
Embodiment 1
[0019] The binder selection molecular weight is the polyethylene glycol of 3000 and 8000, and the mass ratio of the two is 50:50, stir evenly, dissolve and stir by water bath; The filler that adopts is made up of two parts, sodium bicarbonate and talcum powder ( Add 5% aluminum oxide powder), the mass ratio between the two is 60:40, the two are mixed evenly; the mass ratio of the binder to the filler is 60:40, and the filler is evenly added to the melted binder , after stirring evenly, add plasticizer, plasticizer adopts polyethylene, and polyethylene can be dissolved in paraffin, the mass ratio of paraffin and polyethylene is 10:90, and plasticizer accounts for 2% of the total mass of binding agent and filler ; After the core material is fully mixed and heated to 110°C, the soluble core is prepared by injection molding; the prepared soluble core is put into the wax mold, and the wax mold is prepared by injection molding. The mold injection temperature is 55°C-68°C. Put the pr...
Embodiment 2
[0021] The binding agent selection molecular weight is the polyethylene glycol of 2000 and 5000, and the mass ratio of the two is 60: 40, stir evenly, dissolve and stir by water bath; The filler that adopts is made up of two parts, sodium carbonate and talcum powder (adding 10% Al2O3 powder), the mass ratio between the two is 60:40, the two are mixed evenly; the mass ratio of the binder to the filler is 60:40, the filler is evenly added to the melted binder, After stirring evenly, add plasticizer, plasticizer adopts polyethylene, and polyethylene can be dissolved in paraffin, the mass ratio of paraffin and polyethylene is 20: 80, and plasticizer accounts for 3% of the gross mass of binding agent and filler; After the core material is fully mixed and heated to 115°C, the soluble core is prepared by injection molding; the prepared soluble core is put into the wax mold, and the wax mold is prepared by injection molding. The injection temperature is 55°C-65°C. Put the pressed wax ...
Embodiment 3
[0023] The binder selection molecular weight is the polyethylene glycol of 2000 and 5000, and the mass ratio of the two is 60:40, stir well, melt and stir by water bath; The filler that adopts is made up of two parts, sodium carbonate and mica powder (adding 5% Al2O3 powder), the mass ratio between the two is 60:40, the two are mixed evenly; the mass ratio of the binder to the filler is 60:40, the filler is evenly added to the melted binder, After stirring evenly, add plasticizer, plasticizer adopts polyethylene, and polyethylene can be dissolved in paraffin, the mass ratio of paraffin and polyethylene is 15: 85, and plasticizer accounts for 3% of the gross mass of binding agent and filler; After the core material is fully mixed and heated to 110°C, the soluble core is prepared by injection molding; the prepared soluble core is put into the wax mold, and the wax mold is prepared by injection molding. The injection temperature is 55°C-70°C. Put the pressed wax mold into the aqu...
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Abstract
Description
Claims
Application Information
- IPC
- B22C1/02; B22C1/20; B22C9/10
- Inventors
- 毛萍莉; 姜卫国