Patent ID: 11548200

Abstract:
A blow molding assembly includes a die, a mandrel, and a die holder. The die defines an inner wall. The mandrel is disposed at least partially inside the inner wall of the die and defines, with the inner wall of the die, an annular gap that shapes a molten resin passed therethrough, forming a parison. The die holder includes a body and three or more spring-loaded fasteners positioned around an inner perimeter of the body. The spring-loaded fasteners apply pressure to respective positions on an outer surface of the die while permitting movement of the die within a plane that is substantially orthogonal to a longitudinal axis of the mandrel in response to pressure variations of the molten resin, keeping a thickness of the parison substantially even. Each of the spring-loaded fasteners includes a spring-loaded plunger engaging the respective position on the outer surface of the die.