The Japan Steel Works, Ltd.

Yusuke Yonehara

Yutaka Nakagawa

Toshio Toyoshima

An injection apparatus of one embodiment includes a cylinder, a screw, and a drive mechanism configured to drive the screw. The drive mechanism includes a piston having a hollow piston rod, a connection rod having one end side inserted into the piston rod, the connection rod being rotatable with respect to the piston and movable integrally with the piston in a direction of a central axis of the piston rod, and a rotating body which is arranged around the connection rod and is driven to rotate around a central axis of the connection rod as a rotation axis. A plurality of external teeth are provided on the connection rod, and a plurality of internal teeth meshing with the external teeth are provided on the rotating body. Also, the screw is non-rotatably connected to the other end side of the connection rod protruding from the piston rod.

Drive mechanism, injection apparatus, and injection molding machine

A configuration of oil hydraulic power unit is simplified. In the oil hydraulic power unit, a port B and a port C are communicated to each other. By this, the hydraulic oil supplied to the port B can also be supplied to the port C even in exclusion of the solenoid valve and the flow-rate control valve, and, as a result, the hydraulic oil supplied to the port C contacts a side surface of the piston, and therefore, a backward pressure can be applied to the side surface of the piston. Thus, according to the oil hydraulic power unit, the backward movement of the piston can be achieved even in the exclusion of the solenoid valve and the flow-rate control valve.

Injection molding machine and injection apparatus

A twin injection molding machine includes: a mold clamping device configured to clamp a mold; and first and second injection devices each including: a heating cylinder; a screw disposed in the heating cylinder; and a screw driving device including driving system components and configured to drive the screw. The first and second injection devices are disposed symmetrically with respect to a machine center line of the mold clamping device. The driving system components provided in the screw driving device of the first injection device and the driving system components provided in the screw driving device of the second injection device are each disposed on a side away from the machine center line in the respective screw driving devices.

Twin injection molding machine including two injection devices

An injection device includes: a heating cylinder; a screw disposed in the heating cylinder; and a pair of piston cylinder components disposed on two sides of the heating cylinder. The pair of piston cylinder components are installed so that one end portion of each of the pair of piston cylinder components is connected to a mold clamping device, and the heating cylinder and the screw are integrally driven in a direction close to or away from the mold clamping device by expansion and contraction of the pair of piston cylinder components. One of the pair of piston cylinder components is provided with a stop mechanism configured to stop expansion and contraction of the piston cylinder component.

Growing community of inventors

Tokyo, Japan

Yusuke Yonehara