Abstract: An injection molding machine includes a cylinder that feeds a molding material, a screw that is rotatably and advanceably/retractably provided in the cylinder, a plasticizing motor that rotates the screw, a rotation transmission part that is provided in a rear side of the screw in an axial direction of the screw and configured to transmit rotation of the plasticizing motor to the screw. The rotation transmission part includes first and second transmission members provided in a passage where the rotation of the plasticizing motor is transmitted to the screw. The first transmission member is provided toward the plasticizing motor. The second transmission member is provided toward the screw. The first and second transmission members are connected to move relative to each other.

Abstract: An injection molding machine includes first and second friction members, an expandable/retractable member provided in a periphery of the first and second friction members and including first and second end parts, a first attachment member attached to the first end part, and a second attachment member attached to the second end part. A lubricating oil is fed to an area between first and second friction members. A position of the second attachment member relative to the first attachment member is displaced in cooperation with a position of the second friction member relative to the first friction member. The expandable/retractable member is configured to form a reservoir space that stores the lubricating oil in the periphery of the first and second friction members. The expandable/retractable member is configured to expand/retract in correspondence with an interval between the first attachment member and the second attachment member.

Abstract: An injection molding machine includes a cylinder that feeds a molding material, a screw that is rotatably and advanceably/retractably provided in the cylinder, a plasticizing motor that rotates the screw, a rotation transmission part that is provided in a rear side of the screw in an axial direction of the screw and configured to transmit rotation of the plasticizing motor to the screw. The rotation transmission part includes first and second transmission members provided in a passage where the rotation of the plasticizing motor is transmitted to the screw. The first transmission member is provided toward the plasticizing motor. The second transmission member is provided toward the screw. The first and second transmission members are connected to move relative to each other.

Abstract: An injection molding machine includes first and second friction members, an expandable/retractable member provided in a periphery of the first and second friction members and including first and second end parts, a first attachment member attached to the first end part, and a second attachment member attached to the second end part. A lubricating oil is fed to an area between first and second friction members. A position of the second attachment member relative to the first attachment member is displaced in cooperation with a position of the second friction member relative to the first friction member. The expandable/retractable member is configured to form a reservoir space that stores the lubricating oil in the periphery of the first and second friction members. The expandable/retractable member is configured to expand/retract in correspondence with an interval between the first attachment member and the second attachment member.