| 摘要 |
PROBLEM TO BE SOLVED: To efficiently produce a siding board lined and filled with a high quality plastic foam material like hard urethane foam. SOLUTION: The extrusion of a plastic sheet 11 by an extruder 10, the embossing processing due to an embossing roll 12, the molding and cooling of a surface material by a former 20, nail hole processing by a nail hole punching machine 40, corona treatment by a corona treatment machine 42, the injection of a urethane raw soln. from an urethane injector 43, the covering of a backing material by a backing material delivery machine, the foaming of urethane in a heating oven 45, cutting by a cutter 46 and accumulation by an accumulation device 47 are performed continuously.
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