Mold article ejecting device used for an injection molding apparatus

A molded article ejecting device adapted for use in an injection molding apparatus, and adapted to be operated by means of an actuator, the injection molding apparatus including a stationary plate with a first mold portion, and a movable plate with a second mold portion which mates with the first mold portion, the movable plate being disposed to be movable along an axis between an injecting position where the movable plate abuts against the stationary plate such that the first and second mold portions confine a mold cavity for molding of a molded article therein, and a removal position where the movable plate is remote from the stationary plate so as to permit the molded article to be knocked out from the mold cavity, said molded article ejecting device comprising:

• a proximate ejector plate adapted to be disposed distal from the movable plate, and movable along the axis between a knock-out position, where said proximate ejector plate is closer to the stationary plate, and a retracted position, where said proximate ejector plate is distant from the stationary plate, said proximate ejector plate having a receiving bore which extends therethrough in an axial direction parallel to the axis;
• an ejector pin including an inner segment which is received and fitted in said receiving bore and which terminates at a butt end, and an outer segment which is distal from said butt end and which extends from said inner segment in the axial direction, said outer segment being disposed outwardly of said receiving bore, and being adapted to slidably pass through the stationary plate so as to be moved into or away from the mold cavity when said proximate ejector plate is moved to the knock-out position or the retracted position;
• a distal ejector plate adapted to be disposed distal from the stationary plate, and including proximate and distal major ejector surfaces that are opposite to each other in the axial direction, said proximate major ejector surface confronting said proximate ejector plate and being disposed to abut against said butt end, thereby securing said inner segment in said receiving bore;
• an ejector rod including an actuated end which is disposed distal from said distal ejector plate and which is adapted to be actuated by means of the actuator so as to enable said ejector rod to perform a to-and-fro movement along the axis, and a head portion which is disposed opposite to said actuated end in the axial direction;
• and
• a coupler mechanism disposed to detachably couple said head portion to said distal ejector plate in a frictional engagement such that said engagement is maintained when said ejector rod is set in the to-and-fro movement.