Abstract: A method and apparatus for bonding molded pieces including left and right molds, a sheet material setting mechanism for inserting sheet material acting as a bonding medium between the left and right molds, a sliding blade portion that has a cutting blade disposed at a front end thereof for cutting the sheet material, the cutting blade being formed so as to be along outer circumferential surfaces of the molded pieces on a left side of the right mold and the sliding blade portion being movable to left and right inside the right mold, a driving mechanism for moving the sliding blade portion to left and right, a sliding blade bearing portion formed on a right side of the left mold such that the blade bearing portion and sliding blade bearing portion are movable to the left and right inside the left mold, and a spring member for pressing the sliding blade bearing portion to the right.

Abstract: A method for bonding molded pieces, comprising the steps of: providing a mold which can be split into left and right molds, said right mold having a cutting blade formed on a left side thereof so as to be along outer circumferential surfaces of the molded pieces, and said left mold having a blade bearing portion formed on a right side thereof for bearing said cutting blade; setting a pair of molded pieces having sectional shapes coincident with each other into said left and right molds, respectively, in such a manner that end surfaces of said molded pieces to be bonded are put inside so as to face each other, wherein said pair of molded pieces each individually being an extrusion-molded piece or a die-molded piece; attaching said left and right split molds with each other while inserting a sheet material acting as a bonding medium therebetween, so that said end portions of said molded pieces to be bonded are brought into contact with each other via said sheet material, and that said sheet material is cut into