Quick mold manufacturing method?
The entity model, combination of production with rapid prototyping precision casting, metal spraying, electroplating, electrode grinding technology can quickly produce the mould, the manufacturing cycle is commonly traditional numerical control cutting method of 1/5-1/10, and the cost is only 1/3 ~ 1/5.According to mold material, production cost, RP prototype material, production batch, mold precision requirements have developed a variety of technological methods.
(1) make the silicon rubber mold with the fast forming part as the mother mold.
When the number of parts manufactured is less (in batches of 20-50 pieces), the RP prototype is generally adopted as the mother mold, and silicone rubber mold is made by using the silicone rubber pouring at room temperature.Because of the silicone rubber good flexibility and elasticity, for complex structure, fine decorative pattern, no draft Angle (or even have poured draft Angle) as well as with deep groove parts, casting parts can be directly after the completion of take out.This method can produce various kinds of plastic parts and paraffin models in small quantities quickly, easily and cheaply. It is widely used in aerospace, sports goods, toys and decoration equipment.The production cycle is about 1 week.The cost is 1/15-1/20 of the steel die.
Yunnan optical instrument factory development telescope shell rapid mould making case: by making the RP model, adopt silicon rubber mold making ASB plastic samples, to quickly implement the new product development, including the RP prototype, production cycle is 6 days.
(2) metal spraying molding method.
When the service life of mould for below 3000, generally based on RP prototype as a master pattern, the low melting point of the molten metal (such as zinc alloy) after fully atomized spray onto the surface of the master pattern at a certain speed, the formation of mold cavity surface, filling the backing composite materials, production of zinc alloy soft mould.The method is simple, short period, and the cavity surface and fine pattern are formed at the same time.The production cycle is 1 ~ 2 weeks, and the cost is 1/3-1/5 of the CNC processing steel mould.
(3) make steel mold with fast forming part as the mother mold.
When the service life of mould for more than 3000, can be used in the RP prototype as a master pattern, double system composed of epoxy resin and silicon carbide mixture integral grinding wheel grinding wheel (3 d), on the graphite electrode forming machine grinding out the integral graphite electrode, or by using the method of electrochemical principle by electroforming copper deposit in the RP prototype surface about 2-3 mm thick, remove the RP prototype, electrode shell, filling the backing material, make whole copper electrode.Using the above monolithic graphite electrode or integral copper electrode to make steel mold through edm.The mould manufacturing process avoids CNC machining and saves CNC programming and processing time.The die production cycle is 3-4 weeks, and the cost is 1/2 to 1/3 of the steel die.
Yituo group co., LTD. Development of engine connecting rod rapid mould making case: by making connecting rod RP model, using graphite electrode integrally molding technology make connecting rod graphite electrode, by edm manufacturing connecting rod steel mold, production cycle for 3 weeks.