INJECTION DEVICE OF PLASTIC RAW MATERIAL AND PLASTIC LENS

摘要

PROBLEM TO BE SOLVED: To stably and well perform the injection of a plastic raw material using a roller pump or the like while suppressing pulsation or the like. SOLUTION: A first filter is arranged to the flow channel between a raw material tank 1 and the roller pump 4 and a second filter is arranged to the flow channel between the roller pump 4 and a plastic molding cast die 8. In the first and second filters to be used, the pressure loss of the first filter is larger than that of the second filter. COPYRIGHT: (C)2007,JPO&INPIT