Injection-Molding - EMA 4161C 2 PHYSICAL PROPERTIES OF...

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2 EMA 4161C PHYSICAL PROPERTIES OF POLYMERS INJECTION MOLDING PROCESS LABORATORY PURPOSE: To learn the operation of an injection molding and the relationship between mold design and mechanical properties. MATERIALS: Polypropylene EQUIPMENT: Simplomatic Injection Molder Instron Tensile Tester Impact Tester Long Tweezers Safety Glasses Thermocouple Heat resistant gloves PROCEDURE: 1. Turn the machine on and set the temperature controller to 400 ° F. While the machine is heating up, fill the hopper with the polypropylene pellets. Turn the hopper control on (clockwise) and fill the heating chamber. Turn the hopper off when the heating chamber is full. The set temperature is reached once the light on the thermal couple switches from RED to GREEN . Measure and record the temperature of the pellets in the heating chamber. 2. Turn the MOTOR on when the operating temperature is reached. Close the safety shields in front and in the rear of the mold, as well as the shield on the heating chamber.
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