PLASTIC-MATERIAL INJECTION NOZZLE TO MOLD

摘要

PURPOSE: To always automatically hold airtightness even if an injection nozzle is adapted to casting molds having various thicknesses by providing a movable sleeve having a specific structure in the injection nozzle. CONSTITUTION: A fixed part 3 functioning as a fixed sleeve is attached on a mold 2 through a flange 1. The chamber 6 is attached to the variable sleeve 4 sliding through the chamber 6 and having a truncated cone-shaped lower end 5 in a movable manner. The leading end 5 of the variable sleeve 4 is automatically pressed to the truncated cone-shaped wall 8 to hold airtightness. The perfect airtightness capable of corresponding to various thicknesses of the mold 2 can be automatically ensured without performing calculation.