| 摘要 |
PROBLEM TO BE SOLVED: To prevent a fracture along an extruding direction and to improve yield by recessing a plurality of lateral flutes perpendicularly to the extruding direction by hot pressing. SOLUTION: A resin foamed material A is drawn from a containing roller 1, preheated by a preheater 2, and then sent to lateral flute forming rollers 3. When an apparatus is operated, blades 3b of the rollers 3 are rotated while biting the material A, and the material A is processed, and conveyed to a rear stage. Heating temperatures of the blades 3b are different according to a melting temperature of the material A. For example, in the case of a polypropylene resin, a melting point of the polypropyene is 164 to 170 deg.C, and the heating temperature of the blades 3b is set to a range of 150 to 200 deg.C in response to a pressurizing force of the blades 3b. Then, after a 'sag' is provided so that the processing complete sheet may not be torn, the sheet is recovered to a winding roller 5. Here, conveying speeds of the rollers 3 and 5 are regulated substantially the same. Thus, a fracture along the extruding direction can be prevented, and its yield can be improved.
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