A cap compression molding machine is designed for shaping plastic caps using a thermal compression process. Instead of injecting plastic into a mold cavity, this machine compresses molten plastic directly within a heated mold.

The process involves plastic resin being heated until molten, then transferred into a rotating mold. Each mold cavity receives a measured amount of plastic, which is compressed under controlled pressure. After shaping, the cap is cooled and automatically ejected.

This method allows for efficient use of materials and supports continuous production. Cap compression molding machines are widely used in industries requiring lightweight, strong caps for containers such as water bottles, oil cans, and chemical packaging.

This machine type is adaptable for different resin types, including HDPE and PP. Cycle times can be relatively short, allowing for increased throughput without compromising quality. In addition, the reduced need for sprue and runners means less post-processing and material loss.