发明名称 |
Sound absorbing body and manufacturing method thereof |
摘要 |
Sound-absorbing material is provided which is more effective for the same volume. A sound-absorbing body is formed characteristically by hot-compression molding of a raw material (C) comprises a flexible polyurethane foam to a volume ratio ranging from 1/1.5 to 1/12. In the molding, metal molds (A·B) are heated in an electric furnace up to a set temperature of 180° C.; the flexible polyurethane foam of the cell number of 50 is held between the metal molds (A·B), and compressed and heated in the electric furnace in this state at 180° C. for 60 minutes; the fixing clamp is removed; and the hot-compressed urethane foam is taken out to obtain the intended sound-absorbing body. |
申请公布号 |
US9230533(B2) |
申请公布日期 |
2016.01.05 |
申请号 |
US201013378398 |
申请日期 |
2010.06.09 |
申请人 |
|
发明人 |
Nishikawa Yukihiro;Nishikawa Yoshiko |
分类号 |
B29C67/20;G10K11/162;B29C44/56 |
主分类号 |
B29C67/20 |
代理机构 |
McDermott Will & Emery LLP |
代理人 |
McDermott Will & Emery LLP |
主权项 |
1. A method of manufacturing a sound absorbing body, comprising the steps of:
manufacturing the sound absorbing body through hot compression molding of a raw material of soft polyurethane foam to a volume ratio of between 1/1.5 and 1/8, wherein the raw material is compressed and heated during the hot compression molding in order to improve a sound absorbing effect, providing a plurality of holes in a molding die where the soft polyurethane foam contacts, and providing hot air to the holes at a time of hot compression of the soft polyurethane foam, wherein the raw material is compressed and heated by air during the hot compression molding. |
地址 |
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