公开(公告)号：US20150158237A1

公开(公告)日：2015-06-11

申请号：US14412477

申请日：2013-06-20

Applicant: EVONIK INDUSTRIES AG

Inventor： Torsten Frank ,  Manfred Rimpl ,  Vitali Klein

IPC: B29C51/10 ,  C08L27/16 ,  C08L33/12 ,  C08L69/00 ,  C08F120/14 ,  C08G64/00

CPC classification number: B29C51/10 ,  B29C37/0028 ,  B29C51/002 ,  B29C51/06 ,  B29C51/14 ,  B29C51/421 ,  B29C2791/006 ,  B29C2791/007 ,  B29C2793/009 ,  B29K2033/12 ,  B29K2069/00 ,  B29K2995/0018 ,  B29K2995/0026 ,  B29L2031/3052 ,  B29L2031/778 ,  C08F120/14 ,  C08G64/00 ,  C08L27/16 ,  C08L33/12 ,  C08L69/00 ,  C08L2201/10

Abstract: A vacuum thermoforming process for producing a transparent molding free from optical defects, whereby the prior temperature of the mold and preform is controlled, the preform is premolded, the mold is shaped under sub-atmospheric pressure, the mold shape is cooled, and the transparent molding is removed. The transparent plastic molding is produced from polymethyl methacrylate (PMMA) or polycarbonate (PC) with particularly good optical quality and with relatively low cycle times. Upon removal, these moldings are dimensionally stable, free from distortion, and exhibit no surface defects such as pimples.

Abstract translation: 一种用于制造无光学缺陷的透明模制品的真空热成型方法，由此控制模具和预制件的先前温度，将预成型坯预成型，模具在低于大气压的压力下成型，模具形状被冷却，透明 成型被去除。 透明塑料模塑由具有特别好的光学质量和相对低的循环时间的聚甲基丙烯酸甲酯（PMMA）或聚碳酸酯（PC）生产。 去除时，这些模制件尺寸稳定，没有变形，并且没有表现出缺陷，例如粉刺。