专利名称：Method of injection molding plastic lens发明人：Kiyohiro Saito,Hiroshi Asami申请号：US09985910申请日：20011106公开号：USRE038617E1公开日：20041012
专利附图：
摘要：A cavity in an injection molding assembly includes a lower mold insert forshaping a lens convex surface and an upper mold insert for shaping a lens concavesurface. When the heated injection molding assembly is cooled and a lens is ejected aftera molten resin is pressurized by the upper mold insert , the temperature of the lower
mold insert is lowered below the temperature of the upper mold insert , which preventsthe molded lens from bending at a central portion and enable high transfer precision ofinsert shapes.
申请人：HOYA CORP
代理机构：Oliff & Berridge, PLC
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