Injection-transfer molding

Rubber injection transfer molding is a manufacturing process used to produce complex rubber parts with high precision and high quality. This method combines the advantages of traditional injection molding and compression molding to create rubber end products with the advantages of both processes.

The rubber injection transfer molding process consists of several steps. First, an injection molding machine equipped with two separate chambers is prepared. A chamber to melt and inject the rubber and a chamber to keep the rubber at the right temperature.

Rubber is then fed into the chamber and melted into a viscous form. When the rubber has reached the right temperature, it is transferred to another chamber to maintain the temperature until it is to be injected into the mold. This approach makes it possible to maintain the rubber in an optimal condition before it is injected. When the rubber is ready to be injected, it is pushed into the mold chambers through the tool's injection channels. After the rubber has solidified, the tool is opened and the rubber products are taken out and checked.

Advantages of injection-transfer molding:
1. Ability to manufacture complex geometries
2. High precision in manufacturing rubber products
3. More efficient use of the rubber in the form of less spillage
4. High production speed

1. More complex process that requires special equipment and knowledge
2. More expensive machines and tools
3. Longer cycle times compared to injection molding
4. It can be more difficult to eliminate air pockets that can form during the injection phase