Patent ID: 7393196

Claim:
A vertical injection molding machine comprising: a retention plate having a lower portion to which an upper mold is mounted; a turntable having an upper portion to which a lower mold forming a cavity with the upper mold is mounted, the turntable or the retention plate being moved up and down to clamp and release the upper and lower molds; and a control that during operation of the vertical injection molding machine having one or more lower molds mounted on the turntable and the upper mold mounted on the retention plate, controls lubricant fed from a lubricant feeding device to a sliding portion of the revolving turntable to maintain a substantially constant slide resistance of the sliding portion, so as to enable the repeatedly revolved turntable to stop at predetermined positions, and to enable each of the one or more lower molds being revolved with the turntable to stop at positions capable of being clamped with the upper mold.