Vacuum stop valve of die cavity vacuum-pumping system

• Main Authors: YANG NAIGEN, YANG YONG, QI HUANXING
• Format: Patent
• Language: English
• Published: 07.01.2015
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The utility model relates to a vacuum stop valve of a die cavity vacuum-pumping system. The vacuum stop valve solves the technical problem that a vacuum pipe of an existing die cavity cannot be closed timely. The vacuum stop valve comprises a die-casting die with a die cavity. The die-casting die is provided with a feeding channel and a vacuumizing channel. The two sides of the die-casting die are provided with a first sliding channel and a second sliding channel respectively. The first sliding channel is arranged below the vacuumizing channel. A driven valve core capable of sliding vertically is arranged in the first sliding channel. A sliding plug is arranged at the upper end of the driven valve core. The second sliding channel is arranged below the feeding channel and connected with the feeding channel. A drive valve core capable of sliding vertically is arranged in the second sliding channel. An oscillating control mechanism is arranged between the drive valve core and the driven valve core. The vacuum stop valve of the die cavity vacuum-pumping system has the advantages that the vacuumizing channel can be closed automatically after die-casting is started, the vacuum stop valve is good in airtightness, convenient to operate and good in stability, and leakage of die-casting liquid and gas is not prone to occurrence.