LOADING DEVICE FOR INJECTION CYLINDER

摘要

PROBLEM TO BE SOLVED: To provide the loading device for an injection cylinder constituted so that the back pressure (load), which is almost equal to the back pressure based on the throttle resistance caused when an actual molten material passes through the gate arranged to the passage communicating with a cavity from the injection sleeve, is applied to the piston rod of the injection cylinder. SOLUTION: The plunger 21 connected to the piston rod 51 of the injection cylinder of an injection molding machine is fitted and inserted in the insertion hole (inner hole 12b) of a main body 11 so as to be capable of sliding a main body 11 in an axial direction to demarcate and form an operation chamber R1 in the main body 11. A liquid replaced with a molten material of injection molding is provided in the operation chamber R1 so as to seal the operation chamber R1 and the acting chamber R3, which communicates with the operation chamber R1 through a communication passage Po to house the liquid, is provided to the main body 11 and a throttle member (orifice plate 23) having a throttle hole 23a is provided to the communication passage Po. COPYRIGHT: (C)2006,JPO&NCIPI