EJECTOR MECHANISM OF RESIN MOLDING MOLD

摘要

PROBLEM TO BE SOLVED: To prevent a failure in operation of an ejector pin by the thermal expansion of a cavity insert mold. SOLUTION: The ejector pin 23 is divided into a tip side ejector pin 25 and a base end side ejector pin 27. With regard to the tip side ejector pin 25, the flange part 39 of the rear end can move in the radial direction in relation to the base end side ejector pin 27 through a friction material 41. A block side through hole 35 into which the tip side ejector pin 25 is inserted is formed in a block 31 set in a part opposite to the cavity insert mold 7 of a lower mold 1 to communicate with a cavity insert side through hole 33 formed in the cavity insert mold 7. The block side through hole 35 forms a clearance S which allows the movement in the radial direction of the tip side ejector pin 25 associated with the thermal deformation of the cavity insert mold 7 heated by a temperature conditioning means between the hole and the tip side ejector pin 25. COPYRIGHT: (C)2005,JPO&NCIPI