MP3后盖注射模设计与模具制造工艺编制-毕业论文外文翻译.docVIP

______届学生毕业论文（设计） 存档编号：__________ 毕业论文外文翻译 题目： MP3后盖注射模设计与模具制造 工艺编制 系 部： 机电与建筑工程 专 业： 材料成型及控制工程 姓 名： 学 号： 指 导 老 师： 2015 年 2 月 15日 Basic knowledge of?mold (1)?product mould?refers to the use of?its own?specific shape to the shape of a?certain shape and size of the?tool. Plastic products?plastic mold?refers to the use of?its own?specific shape to the shape of acertain shape and size of the?tool. (2)?classification?of plastic molding?die 1,?injection molding?(injection mold,?injection molding) 2,?extrusion?die?(extrusion die,?die) 3,?the pressing mold?(mold,?film) 4,?die casting?mold?(die) 5,?hollow mold?(hollow die) 6,?vacuum?and?compressing air molding?mould (3)?what are the factors that influence the?dimension precision of plastic parts? The error?caused by fluctuations?of 1?mould manufacturing?precision?error?caused by the?2wear degree?caused by the?plastic shrinkage rate?of?3 Error?error caused by?installation error?of 4?mold?5 mold?gap caused by the?moving parts (4)?if the?plastic parts?wall thickness difference?is too large,?use what method to?decrease the wall?thickness difference The?plastic parts?can be taken?too thick?part?hollowed?or?plastic parts?into multiple?pieces of plastic?and?combined method to?decrease the wall?thickness difference. (5)?draft?design?points of?how to label? 1?high precision plastic parts,?the use of smaller?draft Plastic parts 2?dimensions?is high,?the use of smaller?draft 3?plastic parts shape?is complex and not easy to?demould,?selection of large?inclination 4?reinforced plastics?using release?a greater angle of 5?large shrinkage,?slope?increase Lubricant containing?plastic?with a smaller?draft Annotation:?shape?as big?as the benchmark,?slope?direction?obtained?by narrow In?a shape with the?small end?benchmark,?slope from?expanding?direction?made (6)?plastic product?characteristics? Unifo