Patent ID: 7690915
Filing Date: 2010-04-06
Classification: B29C

Abstract:
1. A mold clamping mechanism used in an injection molding machine having a first metal mold and a second metal mold that selectively contacts and separates from the first metal mold, wherein, in molding of resin, the mold clamping mechanism presses the second metal mold contacting the first metal mold against the first metal mold, wherein the second metal mold has a through hole that extends in a movement direction of the second metal mold, wherein the first metal mold has an internal threaded portion that extends on a common line with the through hole and has an opening at a side surface facing the second metal mold, the mechanism comprising: a bolt having a shaft and a head; and a drive mechanism that passes the shaft through the through hole in such a manner that the head of the bolt is arranged at the opposite side to the first metal mold with respect to the second metal mold and that a distal end of the shaft of the bolt is located at the same side as the first metal mold with respect to the second metal mold, wherein, with the second metal mold held in contact with the first metal mold, the drive mechanism rotates the bolt through the head in such a manner that the shaft is threaded to the internal threaded portion, thereby pressing the second metal mold against the first metal mold.