| 摘要 |
PROBLEM TO BE SOLVED: To enable driving under low pressure by configuring a bulb operating member of a needle bar included in a hot runner mold to mechanically move vertically by adoption of a cam mechanism. SOLUTION: A nozzle opening/closing device comprising a cam mechanism and a driving cylinder is set forth at both end parts of a bulb operating member in an under side of a runner block with which a hot runner mold is equipped, the cam mechanism is structured by a cam plate for a nozzle opening/closing equipped horizontally in a moving base and a dependent roller installed with an axis which is installed in a cam channel in a plate surface of the cam plate by setting forth in an edge part of a bulb operating member. Both edge parts of the bulb operating member are supported vertically freely in the cam plate through the dependent roller. COPYRIGHT: (C)2011,JPO&INPIT |
