| 摘要 |
PURPOSE:To mass-produce at low cost a foamed body having good heat insulation and heat resistance, foamed at a suitable foaming magnification by providing a heat insulation device on the expansion part of a foam body through an extruder discharging port. CONSTITUTION:A heat insulation device 6 is provided on a foam body expansion part through an extruder discharging port, and a foaming agent or foaming gas is application-kneaded onto the thermoplastic resin plasticized through heating in an extruding machine, and then molded by extruding it into heated air. In this manner, cooling velocity according to the thermal characteristics of respective resin is given thereto, whereby even resin to be employed as a material has a thermal deformable temperature, a foamed body sheet that is foamed at suitable foaming magnification can be manufactured readily by appropriately keeping the expansion of a foaming body 3 during the period of pulling the foamed body sheet. |
