| 摘要 |
1533732 Moulding composite boards SUMITOMO CHEMICAL CO Ltd 8 Nov 1976 [7 Nov 1975] 46318/76 Heading B5A A laminated corrugated sheet 1 is heated by masked heaters 2 and 2<SP>1</SP>. Pressure is applied by means of plug 5 and mould 6 and the rib structure of the more locally intensely heated region is crushed. The moulding may be assisted by gas pressure difference, e.g. a vacuum or excess pressure on one side of the sheet. |
