瓶盖的注射模设计（Bottle cap injection mould design）.doc

瓶盖的注射模设计（Bottle cap injection mould design） Bottle cap injection mould design Abstract: this paper introduces the application of bottle type in daily life and introduces the design process of the bottle cap. Key words: everyday product mould design practical die cad 1 the introduction Commodities, without too much sometimes USES precision and strength of plastic gear, because the plastics has the plasticity strong, the density is small, higher than strength, affinity, high chemical stability, the characteristic of diversity of appearance, so popular with more and more manufacturers and the people. The plastics industry is a new industry, which is born with the development of the petroleum industry, and the plastic parts are now almost in all the industrial sectors and the daily life of the people. With mechanical industry electronics industry, aviation industry, instrument industry and supplies the development of industry, more and more demand for plastic molding parts, quality requirements also more and more high, this requires forming the development of the mould, the level of design and manufacture should be higher and higher. 2. Analysis of plastic parts 2.1 plastic ABS ABS Chinese name: acrylonitrile-butadiene - styrene copolymer Acrylinitrile - Butadiene - Styrene. Basic features: Non-toxic and tasteless, with a slightly yellow color, the molded plastic parts have a good luster, the density is 1.02 ~ 1.05 g/cm3, its shrinkage rate is 0.3 ~ 0.8%. ABS is very absorbent, it needs to be fully dry before forming, and the water content is less than 0.3 percent. In general, the gap of overflow is about 0.04 mm. ABS has excellent impact strength and does not decline rapidly at low temperature. Have good mechanical strength and certain wear resistance, cold resistance, oil resistance, water resistance, chemical stability and electrical properties. Molding features: ABS has a higher viscosity during heating, so the molding pressure is higher, and the shape of the plasti