PREVENTIVE MAINTENANCE METHOD FOR USING PARTS OF INJECTION MOLDING MACHINE

• Main Author: KUMAZAKI HIROSHI
• Format: Patent
• Language: English
• Published: 28.05.1993
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PURPOSE:To enable systematic production, by a method wherein replacing of using parts is performed at the time in consideration of a necessary procurement time for the using parts through a machine working lapse time when a process quantity which is a limit value where whether a good product can be produced or not and that of a cycle time in terms of production efficiency is attained. CONSTITUTION:When a process quantity and a machine working lapse time are made respectively Q and t, a machine working lapse time t1 is calculated by a relative formula Q=f(t) obtained by an experimental value or a production of Q/ t at a certain time T and a process quantity Q1 which is a limit value where whether or not a good product can be produced and that of a cycle time in terms of production efficiency and replacing of using parts is performed at a warning value Q2 of the process quantity which is (t1-t2) from a machine operation working starting time obtained by going back by a necessary procurement time t2 for using parts of repairing object part.