公开(公告)号：EP1370408A4

公开(公告)日：2006-05-17

申请号：EP02706523

申请日：2002-03-22

申请人： SOLA INT HOLDINGS

发明人： MCCAFFREY NICHOLAS JOHN ,  WALLACE MARK A ,  HENDERSON DAVID SCOTT

IPC分类号： B29C43/58 ,  B29C45/26 ,  B29C45/56 ,  B29D11/00

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.

摘要翻译： 一种使用注射成型机从熔融热塑性树脂材料模制光学透镜的装置，并且包括用于形成由一对相对的间隔开的插入物限定的模具腔的装置，其形状和构造成限定所述光学透镜的相对面并具有 围绕模腔的多个溢流井装置，用于将预定的最佳体积的树脂材料注入所述模腔中; 用于相对于另一个插入件可控地移动至少一个插入件的装置，其中所述相对插入运动由能够在模制期间提供可变压缩冲程的动力缸驱动并且在所述注射完成之前启动; 用于控制所述动力缸的压缩冲程的速度和/或压缩力的装置，使得所述压缩以第一选择的相对较高的速度进行，从而将多余的树脂从所述空腔推动到所述溢流井中，在此之后压缩力变化 达到二级选定水平; 用于在所述模腔上保持次级选定的压缩力的装置; 以及用于弹出透镜的装置。