REDESIGNING OF CLAMP LOCK MECHANISM FOR A STRETCH BLOW MOLDING MACHINE
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- TITLE: REDESIGNING OF CLAMP LOCK MECHANISM FOR A STRETCH BLOW MOLDING MACHINE
- ABSTRACT: Stretch blow molding process is the main method for the mass production of PET containers. In the stretch blow molding process, the motion of the mold is provided by the machine's clamp. Since the speed control of the pistons of clamp is difficult and its precision is poor, it can not be get the product quickly during the production stage. In this study, the top plate of the clamp is designed to fit the servo motor to provide the motion of the clamp. Then solid model analysis was performed and manufacturing of top plate was accomplished. The clamp plate was placed and the servo motor was mounted on the clamp. After the servo shaft had been assembled to the system, the roll bearing and the cam were assembled to the system for the motion of the base of the mold. Finally, the sensors were assembled to indicate the opening and closing points of the clamp. After this constructive change, while the production rate of the double-mold was 900 bottles per hour at the beginning, it was observed that 1042 bottles were produced by an increase of 15.8%. The problem of obstruction was solved, moreover, the air and electricity was saved.
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