Apparatus for injection compression molding

An injection compression molding apparatus comprising:

• a mold unit having a stationary die plate, a mounting plate fixed to said stationary die plate and a mold plate on said mounting plate, a movable die plate movable toward and away from said stationary die plate and having a movable mold plate thereon and defining a mold cavity with said mold plate on said stationary die plate;
• an injection nozzle directed into said mold cavity for injecting a resin to be molded into said cavity;
• a fixed supporting plate;
• main drive means having a main cylinder supported on said supporting plate and a main cylinder ram having the outer end connected to said movable die plate for moving said movable die plate between a position in which said mold plates are fully closed and a position in which said mold plates are open to permit discharge of a molded product;
• and
• compression stroke setting means for blocking movement of said movable die plate in the direction toward said supporting plate at a position spaced a distance away from the fully closed position corresponding to a desired compression stroke of said mold plate, and comprising adjustment means positioned between said movable die plate and said supporting plate, at least part of said adjustment means which has a dimension in the direction of movement of said movable die plate greater than the stroke for moving said movable die plate to the position in which said mold plates are open being movable laterally of the said direction of movement of said movable die plate for permitting said movable die plate to move to the open mold position, and drive means connected to said adjusting means for moving at least said part of said adjusting means in the lateral direction.

An injection compression molding apparatus comprising:

• a mold unit having a stationary die plate, a mounting plate fixed to said stationary die plate and a mold plate on said mounting plate, a movable die plate movable toward and away from said stationary die plate and having a movable mold plate thereon and defining a mold cavity with said mold plate on said stationary die plate;
• an injection nozzle directed into said mold cavity for injecting a resin to be molded into said cavity;
• a movable supporting plate;
• movable die plate drive means having a main cylinder supported on said supporting plate and a main cylinder ram having the outer end connected to said movable die plate for moving said movable die plate between an injection position in which said movable die plate is spaced from the fully closed position by a distance corresponding to a desired compression stroke of said mold plate and a position in which said mold plates are open to permit discharge of a molded product;
• and
• compression drive means operably connected to said supporting plate for moving said supporting plate, said movable die plate drive means thereon and said movable die plate between said injection position of said movable die plate and said fully closed position;
• and
• compression stroke setting means for blocking movement of said movable die plate in the direction toward said supporting plate at said injection position, and comprising adjustment means positioned between said movable die plate and said supporting plate, at least part of said adjustment means which has a dimension in the direction of movement of said movable die plate greater than the stroke for moving said movable die plate to the position in which said mold plates are open being movable laterally of the said direction of movement of said movable die plate for permitting said movable die plate to move to the open position, and drive means connected to said adjusting means for moving at least said part of said adjusting means in the lateral direction.