| 摘要 |
In a foam extrusion apparatus air supplying pipes (6) are mounted on and under semicircle forming rolls (1,2,3,4,5). The air supplying pipes, opening a great number of fine holes (7) on the surfaces, are connected to a constant temperature room, and has a flow rate control valve at its inlet. The temperature adjusting system consists of temperature sensors on the semicircle forming rolls and a display and a microprocessor on the outside.
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