VALVE GATE TYPE MOLDING DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the properties of a resin from being lowered by preventing the local occurrence of a part excessively high in temperature by reducing the difference in resin temperature in the material passage of a valve device. SOLUTION: A valve pin 36 opening/closing a gate 6 is inserted into the material passage 8 in a valve main body 1. A first heater 9 is installed in the intermediate part in the axial direction of the valve main body 1, and a second heater 42 is embedded in a fixed mold to be close to an engagement surface 24 engaging with a fixed ring 7. The intermediate part in the axial direction of the valve main body 1 is heated by the first heater 9, and the tip part in the axial direction is heated indirectly by the second heater 41. COPYRIGHT: (C)2003,JPO