Device for clamping mould

Application Number: 00109324
Application Date: 2000.05.30
Publication Number: 1277914
Publication Date: 2000.12.27
Priority Information: 1999/5/31 JP 152888/99
International: B29C45/67
Applicant(s) Name: A. K. Technical Laboratory, Inc.
Inventor(s) Name: Ohayashi Izumitaro
Patent Agency Code: 72002
Patent Agent: wu jingbei
Abstract A fixed mold, a movable mold for closing a mold with the fixed mold and a core mold being freely gone in and out and positioned in the fixed mold through the movable mold are provided. A hydraulic circuit for a mold clamping device performing to go in and out by means of a differential mold clamping cylinder mounted in a booster ram being independent from an opening/closing cylinder of the movable mold is provided. A hydraulic path on the opening side of the opening/closing cylinder and a hydraulic path of the differential mold clamping cylinder are connected with a communicating path provided with a pressure and flow rate control valve. Required amt. of hydraulic oils flowing out into their hydraulic paths accompanied with opening/closing of the movable mold and going in and out of the core mold are alternately fed into the oil room on the opening side or the differential mold clamping cylinder.