公开(公告)号：US4302411A

公开(公告)日：1981-11-24

申请号：US112137

申请日：1980-01-14

申请人： Tokihalu Nakagawa ,  Shoji Ohmiya

发明人： Tokihalu Nakagawa ,  Shoji Ohmiya

IPC分类号： B29C33/00 ,  B29C35/16 ,  B29C43/00 ,  B29C43/02 ,  B29C43/14 ,  B29C43/32 ,  B29C43/52 ,  B29C43/58 ,  B29C61/00 ,  B29D17/00 ,  G11B3/70 ,  G11B7/26 ,  G11B9/06

CPC分类号： G11B7/263 ,  B29C43/02 ,  B29C43/14 ,  B29C43/52 ,  G11B3/702 ,  B29C35/16 ,  B29L2017/003 ,  Y10S425/81

摘要： A method of producing a plate-shaped body, particularly a video disc in which circumferential warp in the thicknesswise direction, thickness fluctuation and deflection of the signal track are minimized comprisingThe steps of pressing by a mold a thermoplastic resin which has been heated to a temperature above the softening point thereof, and cooling the thermoplastic resin to solidify the same. During the cooling, the pressure of the mold is decreased to a low level when the thermoplastic resin has been cooled down to a temperature around the softening point. The thermoplastic resin is allowed to be solidified without any substantial and local residual stress to ensure minimal circumferential warp, thickness fluctuation and deflection signal track.

摘要翻译： 一种制造板状体，特别是其中在厚度方向上的周向经向，信号轨道的厚度波动和偏转最小化的视盘的方法包括以下步骤：将模具加热至 温度高于其软化点，并冷却热塑性树脂使其固化。 在冷却过程中，当热塑性树脂冷却至围绕软化点的温度时，模具的压力降低至低水平。 允许热塑性树脂固化而没有任何实质和局部残余应力，以确保最小的周向翘曲，厚度波动和偏转信号轨迹。

公开(公告)号：US4427353A

公开(公告)日：1984-01-24

申请号：US333621

申请日：1981-12-22

申请人： Shoji Omiya ,  Masaaki Sunohara ,  Tokihalu Nakagawa ,  Seiji Inagaki ,  Junnosuke Yamawaki ,  Nobuyuki Nakamura ,  Kaoru Yanagisawa

发明人： Shoji Omiya ,  Masaaki Sunohara ,  Tokihalu Nakagawa ,  Seiji Inagaki ,  Junnosuke Yamawaki ,  Nobuyuki Nakamura ,  Kaoru Yanagisawa

IPC分类号： G11B3/70 ,  B29C45/00 ,  B29C45/03 ,  B29C45/07 ,  B29C45/17 ,  B29C45/50 ,  B29C45/56 ,  B29L17/00 ,  B29F1/03

CPC分类号： B29C45/17 ,  B29C45/07 ,  B29C45/50 ,  B29C45/561 ,  Y10S425/81

摘要： An upright injection-compression pressing machine for the manufacture of information carrier discs, such as photograph records and video discs, has a mold clamper assembly including a pair of stamper bearing molds movable relative to each other in a vertical direction towards and away from each other, and an injector assembly mounted on the clamper assembly in alignment with the direction of the relative movement of the molds.

摘要翻译： 用于制造诸如照片记录和视频盘的信息载体盘的立式注射压缩压机具有模具夹持器组件，其包括一对压模承载模具，所述模具夹持器模具能够在垂直方向上彼此相对移动并且彼此远离彼此 以及安装在夹持器组件上的注射器组件，其与模具的相对运动的方向对准。