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1. 发明授权

US5975882A Molded optical component with gate stubs removed from peripheral rim portions 失效
标题翻译：具有从外围边缘部分移除的浇口短柱的模制光学部件
公开(公告)号：US5975882A
公开(公告)日：1999-11-02
申请号：US921341
申请日：1997-08-29
申请人： Yoshimitsu Nomura , Youhei Shinozawa , Masaaki Fukuda
发明人： Yoshimitsu Nomura , Youhei Shinozawa , Masaaki Fukuda
IPC分类号： B23C3/12 , B29C37/02 , B29C45/38 , B29D11/00
CPC分类号： B29D11/00413 , B29D11/00932 , B29C2793/009 , B29C37/02 , B29C45/382 , Y10S425/808
摘要： A molded optical component which is comprised of a lens portion, an annular outer rim integrally formed around the circumference of the lens portion, an annular reference surface formed on the circumference of the outer rim in a predetermined width along one end thereof, and an obliquely cut surface formed across the circumference of the outer rim by stripping a gate stub therefrom. The obliquely cut surface is extended from the other end of the outer rim up to a position falling short of near boundaries of the reference surface. A gate stub is removed from the molded optical component by bringing cutting edges of a rotary cutting tool into engagement with a circumferential portion of the outer rim at a predetermined angle of inclination with center axis of the latter thereby to remove circumferential portions of the outer rim including the gate sub and to form an obliquely cut surface crosswise of the circumference of the outer rim from the other end thereof up to a position falling short of the reference surface.
摘要翻译：一种模制的光学部件，包括透镜部分，围绕透镜部分的圆周一体地形成的环形外边缘，沿着其一端以预定宽度形成在外边缘的圆周上的环形基准表面，通过从其外缘剥离一个浇口短管而形成在外边缘的圆周上。斜切面从外缘的另一端延伸到距基准面近边界的位置。通过使旋转切削工具的切削刃与外边缘的圆周部分以预定的倾斜角度与后者的中心轴线接合，从模制的光学部件移除浇口短棒，从而去除外边缘的圆周部分包括栅极辅助部分，并且从其另一端形成从外边缘的周边横向到斜下方的倾斜切割面，直到不参考基准面的位置。

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