| 摘要 |
PURPOSE:To make it possible to give excellent weatherability and dimensional stability as well as tough rigidity, by specifying the thickness of a contour extrusion molding of a synthetic resin which is extremely softened at a temp. above the second order transition point. CONSTITUTION:A contour extrusion molding whose thickness is 0.5-3.0mm is prepared by using a synthetic resin which is extremely softened at a temp. above the second order transition point. Pellets or powder of the resin is melted and extruded from a contour extrusion mold 2 of a required shape. A sizing apparatus 3 is placed to be close to the contour extrusion mold 2, and a plurality of sizing zones 31... consisting of unit molds for sizing prepared in about the same shape as the mols 2 is set in a line in the extrusion direction and warm water or water at room temp. is circulated in each sizing zone 31... and the temperature is lowered stepwise. An extruded material extruded from the contour extrusion mold 2 is immediately introduced into this sizing apparatus 3 and sized while being slowly cooled. The extruded material taken out is immersed in a water bath 4 and thereby completely cooled to remove deformation of the extruded material, which is then received by means of a take-up machine 5. Then, marking and cutting 6 is carried out on it and it is piled up and stored on a standing vehicle 7. |
