Abstract: A mold includes a position adjustment mechanism that receives a shaft portion extending from a cavity mold, which accommodates a preform, and adjusts a position where the cavity mold is held on a plane intersecting an extending direction of the shaft portion. The position adjustment mechanism includes a first member in which a linear cam hole that receives the shaft portion is formed, and a second member that is disposed to overlap the first member in the extending direction of the shaft portion and rotates with respect to the first member along a plane. The second member has an elongated hole that intersects the cam hole in a direction of the plane and positions the shaft portion together with the cam hole. Further, a position where the cam hole and the elongated hole intersect each other moves along a longitudinal direction of the cam hole by rotation of the second member.

Abstract: A method for manufacturing a resin container includes: injection-molding a first layer of a bottomed cylindrical preform from a first resin material as a first injection-molding; accommodating the first layer manufactured in the first injection-molding in a temperature adjustment mold, adjusting a temperature of the first layer, and forming an opening portion in a bottom portion of the first layer; injecting a second resin material from the opening portion to an inner peripheral side of the first layer to laminate a second layer on the inner peripheral side of the first layer, as a second injection-molding; and blow-molding a multilayer preform obtained in the second injection-molding-step in a state where the multilayer preform includes residual heat from the injection molding to manufacture the resin container.