Patent ID: 7790085
Filing Date: 2010-09-07
Classification: B29C,B29K,B29L

Abstract:
1. A method for manufacturing a long resin molding having an axial bend, comprising: supplying a resin molding material in heated and molten state extruded from an extrusion die to a sizing flow channel of a sizing equipment; solidifying the resin molding material by cooling from outside within the sizing flow channel to calibrate the resin molding into a predetermined cross sectional shape; extruding the resin molding of the predetermined cross sectional shape from an exhaust port of the sizing flow channel at a constant extrusion direction and a constant angle carriage and in a state capable of plastic deformation; supplying continuously the resin molding to a molding gripping portion of a bender disposed on a downstream side of an exhaust port of the sizing equipment along the constant extrusion direction, the gripping portion slidably gripping the resin molding; and controlling a degree of a radius of curvature of a bend in the resin molding in an axial bending process for the resin molding when the resin molding passes through the gripping portion by changing a position of the gripping portion to a position not along the constant extrusion direction; and applying a force on the resin molding in the same direction as the extrusion direction on the downstream side of the exhaust port of the sizing equipment and the upstream side of the gripping portion to cause the force to act as a pulling force of the resin molding from the sizing flow channel and a pushing force of the resin molding to the gripping portion.