Rubber injection molding process by heating the rubber and placing it under significantly more pressure per square inch of cavity surface in molding. This is different from the plastic injection molding process where the materials are cooled under less pressure. Through various innovations, injection molding has become one of the most efficient ways to create molded rubber products in many cases.
The process of injection and injection-transfer molding starts with efficient material preparation. To begin, the material is mixed in bulk and then stripped immediately into continuous approx. 1.25” wide & 3.75” strips. These strips are then fed into a screw which, in turn, fills a barrel with the appropriate predetermined amount of rubber material.
Advantages of injection molding:
- The complete elimination of re-forms.
- Elimination of operator placement of pre-forms.
- Injection screw pre-heats material before forcing it into cavities
- Reduced cycle time
- Economical process for high volumes of medium to high precision components
- Capable of producing over-molded components
- Minimal material waste