Injection apparatus

An injection apparatus that injects molding material into a mold through an injection cylinder operated by fluid pressure of an incompressible fluid to fill the mold with the molding material, the injection cylinder having a side connected to the mold and an operation chamber located at a side opposite to the side connected to the mold, the injection apparatus comprising:

• a pressure accumulating portion, which is connected to the operation chamber to accumulate the fluid pressure;
• a rod mounted in the injection cylinder and projected from the operation chamber in a direction separating from the mold;
• and
• a control unit connected to the rod to control a movement speed of the rod,
• wherein the control unit includes
• a rotary shaft movable in the same direction as the movement direction of the rod in a manner following movement of the rod,
• a conversion mechanism for converting linear movement of the rod to rotation of the rotary shaft;
• a rotation member connected to the rotary shaft and rotated integrally with the rotary shaft;
• a resistance generating member that slides on and contacts the rotation member to generate friction resistance;
• an actuating member moved by an electric drive source;
• and
• a movement mechanism for moving the resistance generating member relative to the rotation member in a manner following movement of the actuating member.