The cavity pressure technology is to install a pressure sensor in the mold cavity and the pressure curve can be used to detect the change of the cavity pressure during the injection molding process, reflecting the injection molding process and monitoring the product quality.

The cavity pressure technology can match quickly curve templates of the cavity pressure,which can improve the product quality.

Through the comprehensive analysis of the peak pressure and curve of the cavity, the quality of the product is discriminated, and the servo manipulator is used to realize the automatic separation of the molded defective product.