公开(公告)号：EP1370408B1

公开(公告)日：2009-12-02

申请号：EP02706523.4

申请日：2002-03-22

申请人： Carl Zeiss Vision Australia Holdings Ltd.

发明人： MCCAFFREY, Nicholas, John ,  WALLACE, Mark, A. ,  HENDERSON, David, Scott

IPC分类号： B29D11/00 ,  B29C45/56

CPC分类号： B29C43/58 ,  B29C45/2669 ,  B29C45/561 ,  B29C2043/5808 ,  B29C2043/5833 ,  B29C2045/562 ,  B29C2045/565 ,  B29D11/00413 ,  B29L2011/0016

摘要： An apparatus for molding an optical lens from a molten thermoplastic resin material using an injection molding machine, and including means for forming a mold cavity defined by a pair of opposed, spaced apart inserts shaped and configured to define opposite faces of said optical lens and having a plurality of overflow wells surrounding the mold cavity means for injecting a predetermined optimum volume of resin material into said mold cavity; means for controllably moving at least one insert relative to the other insert, wherein such relative insert motion is driven by a power cylinder capable of providing a variable compression stroke during molding and is initiated prior to completion of said injection; means for controlling the velocity and/or compressive force of the compression stroke of said power cylinder such that said compression is conducted at a first selected relatively high velocity, thus urging excess resin from said cavity into said overflow wells after which the compression force is varied to a secondary selected level; means for maintaining the secondary selected compressive force on said mold cavity ; and means for ejecting the lens.