Patent ID: 7241133
Filing Date: 2007-07-10
Classification: B29C

Abstract:
1. An adjustment device for a movable wall of an injection molding machine, comprising a sliding base; the sliding base being formed with a plurality of cavities on an upper side thereof; the sliding base being formed with an oil passage communicating with the cavities; the sliding base having oil seals secured around respective ones of the cavities thereof; the sliding base being supported on and movable along a guide rail secured on a bed of an injection molding machine; a plurality of supporting posts; each of the supporting posts having a holding room on a lower end thereof; the supporting posts being inserted in respective ones of the cavities of the sliding base such that the holding rooms communicate with the cavities; the supporting posts touching a bottom of a movable wall of the injection molding machine at upper ends thereof so as to prop the movable wall; the movable wall being supported by and movable along plural guide rods of the injection molding machine; the movable wall having bushings, which are around respective ones of the guide rods; and hydraulic oil; the hydraulic oil being injected into the sliding base and the holding rooms of the supporting posts through the oil passage until axes of each bushing and a corresponding guide rod are aligned with each other, with upper end portions of the holding rooms of the supporting posts becoming air-containing rooms full of air; whereby alignment of the axes of each bushing and the corresponding guide rod will be maintained when the movable wall is moving as well as when the movable wall is still.