| 摘要 |
PURPOSE:To improve the efficiency of works by making the temperature of either one of belts be of a such level that granular materials becomes of a molten state and also making the temperature of the other belt such a level that the granular material become of a semi- molten state, then heating and compressing the granular materials filled in the cavity and after that, cooling them rapidly. CONSTITUTION:In a cavity 3 defined by a pair of endless belts 1, 2, granular materials S consisting mainly of thermoplastic resin are compressed and charged. The temperature of either one of belts is made to be of such a level that the granular materials become a molten state and the temperature of the other belt is also made to be of such a level that the granular materials become a semi-molten state and as they are heated and compressed, at the side of highly temperatured belt, the granular materials consisting mainly of the charged thermoplastic resin become a molten state and at the side of lowly temperatured belt, the granular materials become semi-molten state. And at the part defined by a highly temperatured belt, a non-air permeable layer 42 is formed and an air permeable layer 43 having openings therein is also formed, furthermore, at the inside thereof, a large number of air holes 44 are formed which communicates to these openings. Next, it is cooled rapidly while held and supported by means of paired cooling belts 8, 9, thereby obtaining a molding T. |
