毕业论文（设计）钢塑复合托辊主体模具结构设计2.docVIP

钢塑复合托辊主体模具结构设计 摘 要：钢塑复合托辊是将一般托辊的钢管辊体改为在钢管上包缚一层塑料的复合管材辊体，结合钢和塑料材料的优良特性，使托辊的耐磨、耐腐蚀等性能得到提高，而且减小使用时的噪音，使托辊的质量得到提升。本设计给出了尼龙轴承座和橡胶迷宫式内、外密封圈三件套结构，三者与辊体很好的配合，保证了钢塑复合托辊的质量，使我国托辊从一般的钢制托辊有一个质的提升。为了生产加工这种复合托辊辊体管材，本设计重点设计出了一种以大直径、短长度钢管为内衬的钢塑复合辊体管材的挤出模具结构，为生产出高性能的托辊辊体提供了方便。特别是模具中导向锥和口模采用锥面和正方形面的四点接触，既保证了模具和挤出的钢塑复合管材的同轴度，又能使熔融的塑料流体有四个均匀的通道，它与模具中调节螺钉双重保护和控制了挤出的钢塑复合辊体管材耐磨层厚度均匀和表面光洁。同时设计过程中还对超高分子量聚乙烯塑料的性能和挤出辊体管材所用到的的装置作了简要介绍和分析。 关键字：挤塑模具；钢塑复合托辊；超高分子量聚乙烯；辊体管材；成型设备 Gangsu composite roller main body mould structure design Abstract：Gangsu composite roller is the general steel pipe roller of roller economic restructuring for the package on steel pipe tied a layer of plastic composite pipe roller body, combined with the excellent characteristics of steel and plastic material, make the roller wear resistant and corrosion resistant performance was improved, and the noise when using, make the quality of the roller was promoted. This design gives the nylon and rubber bearing and labyrinth seal structure of three-piece, three with the roller body good, ensure the quality of the steel-plastic composite roller, roller in our country from general steel roller has a qualitative improvement. In order to production and processing the composite roller roller pipe body, this design mainly devised a with large diameter, shorter length of steel tube for lining gangsu composite roller body pipe extrusion die structure, for the idler roller body with high performance provides convenient. Especially mold guide cone and mold by using cone and square the four-point contact, not only ensure the mold and the extrusion of steel-plastic composite pipe alignment, and make molten plastic fluid has four uniform channel, it has to do with double protection and control of the mold adjustment screw extrusion of steel-plastic composite pipe roller body wear-resisting layer thickness and smooth surface. At the same time the design process of the performance of ultra-high molecular weight polyethylene plastic and extrusi