NOZZLE STRUCTURE OF BLOW MOLDING MACHINE

摘要

PROBLEM TO BE SOLVED: To suitably form a cylindrical parison non-uniform in wall thickness by providing a pour guide surface to a pour port non-uniform in opening width in opposed relation to the wide region of the pour port and achieving the proper vertical flow-down of a resin. SOLUTION: In a die purge type pour nozzle 10, a pour guide member 20 to which a pour guide surface is formed is mounted on the lower region of a core 13 and the pour guide surface 23 is opposed to the wide region of a pour port 15 non-uniform in opening width. By this constitution, the resin U poured from the wide region of the pour port 15 is suitably prevented from being biased in a radial direction to vertically flow down toward the area just under the inner peripheral edge of an opening part 12.