Vacuum extraction valve used on die-casting die

• Main Author: LU HONGLIN
• Format: Patent
• Language: English
• Published: 12.08.2015
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention discloses a vacuum extraction valve used on a die-casting die. The vacuum extraction valve comprises a moving valve body, a stationary valve body and a backboard, the stationary valve body is located between the moving valve body and the backboard, and an L-shaped exhaust duct is arranged on the upper portion of the moving valve body; a cavity provided with a feeding port is formed in the end face of the stationary valve body, a linkage mechanism used for controlling gas to enter and exit is arranged inside the stationary valve body, the linkage mechanism is matched with a pressure hole and an exhaust hole formed inside the cavity, and the exhaust duct corresponds to the upper end of the cavity; an ejection mechanism is arranged on the backboard, the front end of the ejection mechanism penetrates into the stationary valve body, and the linkage mechanism is located in the ejection mechanism. The vacuum extraction valve has the advantages of being ingenious in structural design and low in cost, the vacuum extraction valve enables the die-casting die to extract air smoothly in the production process, the fabrication process of the vacuum extraction valve is simple, and the maintenance cost is low.