JPS644321A - Stamping molding material and its manufacture - Google Patents

Abstract

PURPOSE:To improve strength at a rib/boss part by facilitating intrusion of a fiber into the rib/boss part, by a method wherein a reinforced layer is formed of a plurality of mats composed of fibrous substance, laminated and a sheetlike matter composed of the same and thermoplastic resin is impregnated under heating and pressurization for integration. CONSTITUTION:Thermoplastic resin 2 is extruded through a die 10 of an extruding machine and heated between supporting belts 11 by a heating unit 13 along with a mat composed of fibrous substance. Then after the same has been sent for integration while pressurizing by a pressurizing roll 12, the same is cut off appropriately by a cutting blade 14 and a stamping molding material 7 is formed. It is preferable to make use of a glass fiber or a carbon fiber especially solely or through mixing, in fibrous substance 3. Then it is preferable that the surface of the fiber is treated with such a treatment agent that gives suitable adhesion for thermoplastic resin to be used, for example, a silane coupling agent. As ends of the fiber are oriented at an inlet of a rib part under a state where the same possesses an angle easy to flow in, in the case of the stamping molding material like this, the fiber flows easily into the rib part along with the resin under pressurization and a molding superior in mechanical physical properties can be given.