Quality improvement of molding machine through statistical process control in plastic industry

Enhancing the process capability is a must in quality improvement of process manufacturing in the industry. Usually, Statistical Process Control (SPC) is applied to measure the activity of quality improvement. In this case, the statistical process control is used to measure the process capability of molding machine in regard to force the result of inner contact rubber button in the plastic industry. The forces of inner contact rubber button which are produced by molding machine already become the critical point as a judgment of malfunctions or not. Meanwhile, the forces problem still is found in molding machine that affects to the inner contact rubber button as defect product. Furthermore, as the show of SPC, the process capability of molding machine is 0.63. This means the process capability is needed for improvement. Seeing that the result of quality improvement is made by applying Poka-Yoke, the process capability of molding machine is improved to 1.65