Injection unit of injection molding machine

An injection unit of an injection molding machine, comprising:

• a barrel having a nozzle at a forward end and connected to a back surface of a mold through the nozzle;
• a screw incorporated in the barrel and configured to inject a molten resin into the mold by being forwardly moved in the barrel;
• a front plate configured to support a rear end portion of the barrel;
• a rear plate arranged on a backward side of the front plate and connected through tie bars to the front plate;
• an intermediate plate arranged between the front plate and the rear plate, said intermediate plate having through holes through which corresponding tie bars extend and guided by the tie bars to be moved in a forward/backward direction and configured to support the rear end portion of the screw through a bearing;
• a motor mounted to the intermediate plate and configured to rotationally drive the screw in the barrel;
• a linear drive device mounted to the rear plate and configured to drive the intermediate plate in the forward/backward direction;
• a fixed base;
• and
• a slide table set on the fixed base and configured to support the front plate, rear plate and intermediate plate and movable in the forward/backward direction, wherein said intermediate plate is supported by a linear slide guide on said slide table to be movable in the forward/backward direction over said slide table.