Patent ID: 8609015
Filing Date: 2013-12-17
Classification: B29C,B29K

Abstract:
1. A method for forming a resin molded article, characterized by comprising the steps of: melting and kneading a thermoplastic resin; storing a predetermined amount of the melted and kneaded thermoplastic resin; extruding the stored thermoplastic resin intermittently in a predetermined extrusion amount per unit time from an extrusion slit provided in a T-die and having a predetermined gap, such that the resin droops downward in a shape of a molten sheet, whereby the molten sheet-shaped resin having a predetermined thickness is extruded downwardly from the extrusion slit at a predetermined extrusion speed; sandwiching the sheet-shaped resin between a pair of rollers arranged below the extrusion slit in such a manner that the pair of rollers is relatively moved toward each other after a lowermost part of the sheet-shaped molten resin extruded downward passes through between the pair of rollers whose gap is widened to be larger than the predetermined thickness of the sheet-shaped resin; feeding the resin downward at a feeding speed higher than, or equal to the predetermined extrusion speed by rotary driving of the rollers, so as to make the thickness of the molten sheet-shaped resin uniform in the extruding direction; disposing the sheet-shaped molten resin, fed by the rollers, near a side of a mold arranged below the pair of rollers; and forming the sheet-shaped resin in a shape conforming to a shape of the mold at least by depressurizing a sealed space formed between the sheet-shaped resin and the mold.