| 摘要 |
PURPOSE:To prevent entanglement of fibrous fillers to unify the dispersement thereof and obtain a molded form without scattering in the strength thereof, by a method wherein a molding material is mixed with specified fibrous fillers and is heated and conveyed by employing a screw having a specified L/D and taper of a shaft. CONSTITUTION:Molding material 2 is mixed with fibrous filler of the length of 5-50 mm under a condition that a plurality of the fibers are bundled while interposing synthetic resin powder 7 between the fillers 1, and the bundle is covered by a synthetic resin film 6 of the same quality as the powder 7, further as a heat conveying mechanism 3, a screw is used wherein L/D is at least 25 and a taper of a shaft 10 is at most 0.02, and the molding of the material is effected by an injection-compression- development method. The length of the fibrous filler is 5-50 mm, therefore, a molded form may be imparted with a sufficient strength and, further, as a heat conveying mechanism the screw having L/D of 25 or more and the shaft taper of 0.02 or less is employed, therefore, such a molded form can be obtained in which the entanglement of the fibrous filler, accompanied by the pressure kneading of the molding material, is eliminated, the dispersion of the fibrouas filler is uniform and scattering in the strength thereof is eliminated. |
