Invention Grant
US5667741A Method of manufacturing a molding for energy absorbent pads and mold
used in the method
失效
在该方法中使用的能量吸收垫和模具的模制品的制造方法
- Patent Title: Method of manufacturing a molding for energy absorbent pads and mold used in the method
- Patent Title (中): 在该方法中使用的能量吸收垫和模具的模制品的制造方法
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Application No.: US628233Application Date: 1996-04-04
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Publication No.: US5667741APublication Date: 1997-09-16
- Inventor: Keiichiro Tabata , Yoichi Nabeshima , Taikyu Fujita , Kazufumi Yokoyama , Torao Hashimoto
- Applicant: Keiichiro Tabata , Yoichi Nabeshima , Taikyu Fujita , Kazufumi Yokoyama , Torao Hashimoto
- Applicant Address: JPX Tokyo
- Assignee: Bridgestone Corporation
- Current Assignee: Bridgestone Corporation
- Current Assignee Address: JPX Tokyo
- Priority: JPX7-349134 19951220
- Main IPC: B29C39/04
- IPC: B29C39/04 ; B29C39/42 ; B29C44/34 ; B29K75/00 ; B29L31/24 ; C08G18/40 ; C08G101/00 ; B29C44/10
Abstract:
Disclosed herein is a method of manufacturing a rigid polyurethane foam molding for energy absorption, including the steps of introducing a rigid polyurethane foam raw material composed primarily of a polyhydroxy compound and a polyisocyanate compound into a cavity in a mold, and blowing and reacting the rigid polyurethane foam raw material in the cavity, wherein a pack ratio of a core portion of the molding ranges from 0.5 to less than 1.2. Accordingly, the rigid polyurethane foam molding can obtain a plateau value comparable to that of a rigid polyurethane foam slab stock foam suitable for an energy absorbent pad.
Public/Granted literature
- US4629308A Lens and shutter positioning mechanism for variable-magnification copier Public/Granted day:1986-12-16
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