Exhaust block for vacuum die casting

● In pressure die casting, since filling a cavity with an alloy is extremely rapid, vacuum technology is recognized as being the most efficient solution to evacuate air and gas. With this technology, superior quality parts can be produced. Today, vacuum technology plays a key role in the production of complex and high quality parts such as structural parts.
● In its innovative vacuum technology, Greatech uses two methods of guaranteeing optimum evacuation until the end of the filling phase: patented Auto-close chill-vent design to closed the vent synchronous with the end of the filling with an ingenious aerodynamic design.
● The Greatech vacuum system is suitable for all production cells and molds. It is the technology peripheral device for pressure die casting providing additional injection process control and patented True Cyclonic Unit to improve run time between cycles and facilitate maintenance, the True Cyclonic Unit are critical to preventing loss of vacuum during run cycles and preventing impurities from reaching the vacuum pump.

Vacuum Casting Process

Vacuum Control Module

True Cyclonic Unit

● Summary
The Auto-close chill-vent is designed and manufactured by Greatech, is equipped with mechanism that permits variation of the air venting section, during the approaching phase and part of the cavity filling, the venting section can be 3 or 4 time larger than in a standard chill-vent, making all evacuation easier, once the metal approaches the chillvent, it automatically close up and freeze the aluminum, preventing splashes outside the die.