超高分子量聚乙烯注射成型技术的研制及应用

Development of Injection Molding Technique of Ultra High Molecular Weight Polyethylene and Its Application fields

分析了超高分子量聚乙烯 (UHMW PE)的口模流动特性 ,论述了UHMW PE专用注射机及注射成型工艺的特点 ,并探讨了UHMW PE注射制品的应用领域。研制的UZ30 0型注射机的参数为 :螺杆直径 4 5 ,注射量 30 0g。结果表明 ,在低温、低压、低速条件下成功地实现了注射成型 ,典型制品每小时可成型 2 7模 (一模两腔 ) ,制品形状、尺寸稳定 。

The die flow characteristics of Ultra High Molecular Weight Polyethylene (UHMW PE)is analyzed,the features of UHMW PE injection molding machine for special use and the technology and formulation are discussed,the application fields of UHMW PE products are also probed.The parameters of developed UZ300 type of injection molding machine are:diameter of screw is 45,injection capacity is 300g.The result showed that,under low temperature,low injection pressure and low injection rate,the successful injection was realized,the productivity is 27 moldings(two cavities) per hour for typical article,the shape and dimension was stable,so the technique reached industrialization level.