Patent ID: 6217817
Filing Date: 2001-04-17
Classification: B29C

Abstract:
A method of blow-molding tube containers, which comprises introducing blow air from an inlet port thereof into a parison having been extruded by an extruder thereby shaping a tube container and forming a discharge port in a portion of a wall of an unnecessary portion of the tube container located at an opposite side to the inlet port and successively applying blow air into the tube container, wherein the discharge port is formed in a concave section formed on an inner wall of a metal mold having a discharge port communicating to the outside of the metal mold by bursting the wall of the tube container in softened state by inner pressure of the blow air and wherein a cross-sectional area of an opening of the discharge port is 50% to 65% of a cross-sectional area of an opening of a blow air sucking section.