| 摘要 |
<p>PURPOSE:To improve thermal expansion and contraction or rigidity by applying a thermoplastic resin B to both surfaces of a composite core material formed by laminating a core material wherein a thermoplastic resin A is held to or infiltrated in a reinforcing fiber material and a metal sheet or a metal reticulated body and applying bending processing to the coated core material within the temp. range from the softening temps. of the resins A, B to below the melting temps. thereof to form an eaves gutter shape. CONSTITUTION:A thermoplastic resin A is caught in, bonded to or infiltrated in a reinforcing fiber to form a core material 12 and a metal sheet or a metal reticulated body 13 is laminated to the core material 12 to constitute a composite core material 14 which is, in turn, introduced into the crosshead mold 60 of an extruder 61 in a flat state through pinch rolls 50 and a thermoplastic resin B is extruded herein to be applied to both surfaces of the core material 14 in a molten state to form a resin coated composite core material 10. Continuously, the resin coated composite core material 10 is introduced into a bending processing machine 80 through pinch rolls 70 and heated to temp. equal to or higher than the softening points of the resins A, B but below the melting temps. thereof to be formed into an eaves gutter shape by bending processing.</p> |
