Melet Plastics Inc.

Unscrewing Molds

• Client: Water Heater Manufacturers
• Project: Valve Body
• Services: Unscrewing Mold Technology

This application required a cost effective plastic drain valve assembly which would replace traditional brass valves used in the water heater industry. The valve body required several thread features, both internal and external.

Melet designed and built a high production four cavity mold capable of producing the valve body component. The internal threads are released from the tooling using hydraulic motors to unscrew the cores. Since the valve has a Y-shape design the mold also required mechanical slides to release the non-threaded cores. The tooling includes interchangeable inserts which allow multiple shank lengths to be produced from a single mold.