Understanding the Key Elements of Plastic Injection Molding Machinery

1. Injection Unit

The injection unit is the heart of the plastic injection molding machine. It consists of a cylinder, plunger, and a heating system. The cylinder is filled with molten plastic material, which is then pushed through the plunger into the mold cavity. The heating system ensures that the plastic material remains in a liquid state throughout the molding process.

2. Clamping Unit

The clamping unit holds the mold securely during the injection and cooling phases of the process. It consists of a movable platen and a stationary platen that clamp the mold together. The clamping force is adjusted according to the size and type of the mold being used.

3. Mold

The mold is the key component that determines the shape and size of the final product. It consists of two halves that are joined together by the clamping unit during the molding process. The mold has a cavity that will be filled with molten plastic, and a core that defines the inner shape of the product.