NOZZLE STRUCTURE FOR INJECTION MOLDING AND INJECTION MOLDING MACHINE HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To prevent flow-out of a molten material or molding fault or the like by stabilizing a forming state of a cold plug in an injection nozzle and to shorten a cycle time of injection molding and to improve productivity by accelerating a forming speed of a solidified region in the injection nozzle. SOLUTION: In the injection nozzle 30, a distance A from a distal end opening 32a to a tapered part 32b becomes twice as long as a distance B from the opening 32a to a throttle 32e at a nozzle tip 32. The distance B is 1.5 times as long as a length C of the distal end outer surface 32c.