THE EFFECTS OF MOLD CLOSING SPEEDS AND POSITIONS ON THE PINCH-OFF STRENGTH OF AN EXTRUSION BLOW MOLDED BOTTLE

摘要

This study will show the effects of mold closing speed and position on the pinch-off strength of an extrusion blow molded bottle. It is important to have an optimal mold closing speed and position so the pinch-off strength is most advantageous to the part integrity. Today, the industry uses past knowledge to process the pinch-off strength. The study will add more scientific knowledge to the industry and improve overall pinch-off strengths. This is needed because simply relying on past experience may not help in new and more difficult situations. Data acquired from the study will give the necessary results to optimize the mold closing speed, position, and pinch-off strength on an extrusion blow molded bottle. It was found that the slower mold closing speed and larger mold closing position created the greatest pinch-off strength and thickness.