Invention Grant
- Patent Title: Injection compression molding method of lens
- Patent Title (中): 镜头的注射压缩成型方法
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Application No.: US11987792Application Date: 2007-12-04
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Publication No.: US08506857B2Publication Date: 2013-08-13
- Inventor: Tatsuo Nishimoto , Kiyohiro Saito , Kenji Tanagawa , Tetsuya Uchida
- Applicant: Tatsuo Nishimoto , Kiyohiro Saito , Kenji Tanagawa , Tetsuya Uchida
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2001-333245 20011030; JP2001-371976 20011205; JP2001-385158 20011218
- Main IPC: B29D11/00
- IPC: B29D11/00

Abstract:
An injection compression molding method of a lens is provided, where a toggle link mechanism (65) is actuated to close a molding die (50) and a movable die plate (64) is moved to a position establishing a cavity thickness of greater than a thickness of an article to be molded while the die is closed. After injecting a molten resin into the cavity, the molten resin is sealed in the cavity and the toggle link mechanism (65) is actuated to advance the movable die plate (64) toward a fixed die plate (61), the relative position of a rear die plate (62) and the movable die plate (64) is made constant at a position where extension of a tie bar (63) becomes a predetermined value, and the molten resin is cooled for a predetermined time after completion of pressurizing the resin.
Public/Granted literature
- US20080093756A1 Injection compression molding method and injection compression machine of lens Public/Granted day:2008-04-24
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