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公开(公告)号：JPH09169036A
公开(公告)日：1997-06-30
申请号：JP34913495
申请日：1995-12-20
Applicant: BRIDGESTONE CORP
Inventor： TABATA KEIICHIRO , NABESHIMA YOICHI , FUJITA YASUHISA
Abstract: PROBLEM TO BE SOLVED: To efficiently produce a molded product by reducing the pressure in a cavity housing a specific foamable raw material to foam and react the same and molding a hard polyurethane foam molded product of which the core part has a packing ratio of a specific value. SOLUTION: A recessed part 4 is formed to the lower mold 3 forming a mold 1 and the upper mold 2 of the mold 1 becomes the lid member of the recessed part 4 to form a cavity 5 and a hollow chamber 7 is formed outside the closure part 6 of the recessed part 4 and a pressure adjusting valve 9 is provided to connect the chamber 7 and an air suction device 11 by an air pipe 10. A predetermined amt. of a hard polyurethane foam foamable raw material based on a polyhydroxy compd. and a polylsocyanate compd. is introduced into the cavity 5 and the air in the cavity 5 is sucked by the air suction device 11 to reduce the pressure in the cavity 5 to predetermined pressure to foam and react the foamable raw material to obtain an impact absorbing hard polyurethane foam molded product of which the core part has a packing ratio of 0.5-below 1.2. Therefore, production can be efficiently performed.
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Patent Agency Ranking
公开(公告)号：JP2002179752A
公开(公告)日：2002-06-26
申请号：JP2000382351
申请日：2000-12-15
Applicant: BRIDGESTONE CORP
Inventor： FUJITA YASUHISA
Abstract: PROBLEM TO BE SOLVED: To obtain an energy absorber of a hard polyurethane foam having high performances and productivity, with no inner fracture at a cast-molding with shortened cure time. SOLUTION: This energy absorber is obtained by cast-molding a liquid raw material of a hard polyurethane foam having 130 to 180 isocyanate index.
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公开(公告)号：JPH09234748A
公开(公告)日：1997-09-09
申请号：JP16235396
申请日：1996-06-03
Applicant: BRIDGESTONE CORP
Inventor： TABATA KEIICHIRO , NABESHIMA YOICHI , FUJITA YASUHISA
IPC: B29C39/32 , B29C39/36 , B29K75/00 , B29K105/04 , B29L31/58
Abstract: PROBLEM TO BE SOLVED: To facilitate the removal of a molding from a mold, to vacuum-form a film in advance, to return to an initial form easily, to save labor, to shorten mold using time, and to improve productivity. SOLUTION: A polypropylene film 6 which does not have adhesion to a molding 16 is vacuum-formed in advance in a form analogous to the cavity 5 form of a lower mold 3 and/or an upper mold 2. Next, an expandable raw material is cast on the film 6 in the cavity 5 and expanded. When the expansion of polyurethane foam is finished, the molding 16 is lifted with the film 6, only the molding 16 is peeled off from the film 6 and removed from a mold 1 without removing the whole film 16 from the mold 1, and the lifted film 6 is returned to an initial vacuum-formed form to be rearranged in the cavity 5.
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公开(公告)号：JPH07156162A
公开(公告)日：1995-06-20
申请号：JP34042693
申请日：1993-12-07
Applicant: BRIDGESTONE CORP
Inventor： NABESHIMA YOICHI , FUJITA YASUHISA , YOKOYAMA KAZUFUMI , HASHIMOTO TORAO
Abstract: PURPOSE:To produce an impact absorbing molded product by setting the pack ratio of the core part of a molded product to a specific range at the time of the production of a hard polyrethane foam molded product to perform foaming and reaction. CONSTITUTION:A polyurethane foamable raw material based on a polyhydroxy compd. and a polyisocyanate compd. is foamed and reacted in a mold consisting of an upper mold B and a lower mold A to produce a hard polyurethane foam molded product. At that time, a spacer C with a thickness of 2mm or more is arranged between the upper and lower molds B, A and the pack ratio of the core part of the molded product is set to 1.0-1.20 to perform foaming and reaction. By this constitution, the aspect ratio of a cell shape constituting foam becomes a range pref. as an impact absorbing material, that is, 1.20 or more to produce an impact absorbing molded product.
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5.发明专利
公开(公告)号：JP2011218573A
公开(公告)日：2011-11-04
申请号：JP2010086750
申请日：2010-04-05
Applicant: Bridgestone Corp , 株式会社ブリヂストン
Inventor： FUJITA YASUHISA
Abstract: PROBLEM TO BE SOLVED: To provide a molding die preventing the deterioration of molding die quality by venting a proper amount of gas while maintaining the sealability of a cavity, and a method of manufacturing a foamed molding using the molding die.SOLUTION: The molding die 10 includes a packing 16 surrounding a cavity C at least on either one of split surfaces 18 of two split molding dies 12, 14 that are configured to openably/closably form the cavity C inside. The packing 16 is provided in a manner that at least a part of the packing protrudes from the split surface 18. Packing grooves 22 are formed on a protruded surface of the packing 16 as gas discharge passages for discharging gas in the cavity C. Each of the packing grooves 22 is formed in such a way that its bottom 22a is at a depth exceeding the split surface 18. This makes the discharge amount of gas to be a proper amount while preventing the large amount of foam material P from entering between the split surfaces 18, 20 by maintaining a proper discharge amount of gas.
Abstract translation: 要解决的问题：提供一种通过在保持空腔的密封性的同时排出适量的气体来防止成型模具质量劣化的成型模具，以及使用该成型模具制造发泡成型体的方法。 解决方案：成型模具10包括至少在两个分开的模具12,14的分离表面18中的任何一个上围绕空腔C的填料16，其被构造成在内部可开启/闭合地形成空腔C. 填料16以至少一部分填料从分割面18突出的方式设置。填料槽22形成在填料16的突出表面上，作为用于排出空腔C中的气体的气体排出通道。 填充槽22以使其底部22a处于超过分割面18的深度的方式形成。这使得气体的排出量为适当的量，同时防止大量泡沫材料P进入分离 通过维持适当的气体排出量来使表面18,20。 版权所有（C）2012，JPO＆INPIT
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公开(公告)号：JPH07164452A
公开(公告)日：1995-06-27
申请号：JP34278493
申请日：1993-12-16
Applicant: BRIDGESTONE CORP
Inventor： FUJITA YASUHISA , NABESHIMA YOICHI , HASHIMOTO TORAO , YOKOYAMA KAZUFUMI
IPC: B60R13/02 , B29C39/10 , B29C39/36 , B29C45/14 , B29K105/04 , B29K105/20
Abstract: PURPOSE:To facilitate removal of a product and to improve productivity by pouring hard polyurethane foam raw material in a plastic film in molds, taking it out at a stage of finishing its expansion, and separating the film. CONSTITUTION:Plastic films 2A, 2B of a shape similar to those of separable lower mold 1A and upper mold 2B having a product shape are installed in the molds 1A and 2B, a hard polyurethane foam raw material 3A is poured in a plastic film 2A in the molds, the molds 1A and 2B are closed and clamped. The molds are opened at a stage of finishing expansion of the material 3A due to foaming, and polyurethane foam 3B is taken out from the molds together with the films 2A, 2B. Then, when the films 2A and 2B are separated, a hard polyurethane foam molded form 3B can be obtained.
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