| 发明名称 |
Method of press-molding thermoplastic resin |
| 摘要 |
A thermoplastic resin is molded by a press-molding method wherein a thermoplastic resin in a molten state is compressed to flow between a pair of female and male molds (11, 12) so as to be formed into a predetermined shape. A compression rate of the mold is controlled so that the following expression (1) is satisfied: <MATH> wherein A (mm/s<2>) is an acceleration which is realized at a time when the compression rate is 75% of a maximum rate in a compression-acceleration region , which region is defined as a period of time from a moment when the compression of the molten thermoplastic resin is started to a moment when the compression rate reaches the maximum rate; and B (mm/s<2>) is a deceleration which is realized at a time when the compression rate is 75% of the maximum rate in a compression-deceleration region, which region is defined as a period of time from a moment when the compression rate reaches the maximum rate to a moment when the closing of the molds is completed. By this method, a molded article having excellent surface appearance free from unevenness of gloss and surface irregularity can be obtained. <IMAGE> |
| 申请公布号 |
EP0768159(A3) |
申请公布日期 |
1999.06.30 |
| 申请号 |
EP19960116241 |
申请日期 |
1996.10.10 |
| 申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
MATSUMOTO, MASAHITO;TSUTSUBUCHI, MASAAKI;KITAYAMA, TAKEO;NAKAMURA, YUKITO;TOGAWA, YOSHIAKI |
| 分类号 |
B29C43/36;B29C43/58 |
主分类号 |
B29C43/36 |
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