Indirect Mold Casting Method

(1) Ceramic type precision casting method

This method can be used when producing steel molds in a single piece or in small batches. The process is: RP prototype as the master mold → dipping ceramic mortar → curing the mold shell in the oven → burning the master mold → preheating the mold shell → burning the steel (iron) cavity → polishing → adding the burning cooling system → Make injection molds for production.

The advantage is that the process equipment is simple, and the obtained mold has excellent copyability and excellent surface finish as well as high dimensional accuracy. Engineering plastics can be gasified at high temperatures with no residue and are suitable for investment in mold making.

(2) Sand casting method

The RP prototype is used as a model to make a sand mold, and then steel is cast to obtain a working portion of the mold. If the performance of the cast steel is greatly improved, various molds can be manufactured by this method, and the mold life is not greatly reduced. The high strength properties of ABS materials make it suitable for making large, solid models.

(3) Paraffin casting method

This method can be used in mass production of metal molds. Firstly, using a RP prototype or a molded mold of a wax mold according to a reconstituted silicone rubber metal resin composite or polyurethane, and then using the molding mold to produce a wax mold, and then using a paraffin casting process to form a steel (iron) mold. .

In addition, when a complex mold is produced in a single piece, the RP prototype can be directly used instead of the wax mold. If the SL method is used, the prototype can be made into a loose porous honeycomb structure for rapid casting. Under sufficient oxygen conditions, the resin prototype can be decomposed into water vapor and CO2 at around 980 °C.

(4) Gypsum casting method

Using RP, the prototype is turned into a gypsum mold, and then a non-ferrous alloy mold such as aluminum or zinc is cast under vacuum, which can produce injection molded products in small batches. The low-melting alloy is cast by using the RP prototype as a low-melting alloy mold, which can be used to suppress the sand core for casting.

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