CORE AND METHOD AND APPARATUS FOR MANUFACTURING THE SAME, EXTRUSION MOLDED PRODUCT, AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To prevent any trouble attributable to burrs formed on an edge of a core piece part when a space part is formed in a core embedded in a weather strip. SOLUTION: A plurality of space parts 24 are formed by the punching at predetermined intervals in the longitudinal direction of a core material, and a core 16 having the shape with a core piece part 22 and a space part 24 being alternately provided in the longitudinal direction is fed to straightening rollers 38. The straightening rollers 38 are rotated and the core 16 is held between the straightening rollers 38 and continuously moved in the longitudinal direction while being pressed. Straightening for executing the plastic deformation of burrs 26 projected in the thickness direction along an edge of the core piece part 22 to the inward of the space part 24 when forming the space part 24 is achieved to prevent the burrs 26 from being projected from the surface of the core 16. In this condition, the core 16 is held between the straightening rollers 38 while the core is curved in the longitudinal direction so that the burrs 26 are on the outer circumferential side, and the burrs 26 are effectively deformed to the inward of the space part 24. COPYRIGHT: (C)2010,JPO&INPIT