The tip release agent required for cold chamber die casting is also applied to the casting piston/sleeve system before each shot.
There are two fundamentally different application types to lubricate the shot tips:
Applying an oil or lubricant-containing liquid to the shot tip
HAI’s high-performance oil can be used universally for many piston / casting chamber pairings and casting alloys. Due to its composition, the product does not interfere with the post-treatment of castings.
Application of wax based pellets in the casting chamber in front of the tip head
The surface temperature of the casting chamber (min. 180°C/356°F) makes the pellets melt and the liquid-state lubricant drawn into the gap between piston and casting chamber via capillary action. The main advantage of this lubrication method is a much cleaner environment around the casting chamber.
HAI offers different pellet types for specific challenges, all of which are free of graphite, which sooner or later would otherwise end up coating everything with a dark grey, greasy layer. As an alternative to graphite, the HAI pellet type with the highest lubricating performance uses an extremely effective alternative raw material, which allows it to be used for piston diameters of up to 160mm.
In order to ensure optimal use, HAI also offers its customers the Pellet Feeder and Mobile Pellet Feeder dosing units. These dose the specified amount of pellets into the casting chamber without allowing any pellets to bounce back out. As a result, casters benefit from a much cleaner environment and an efficient, loss-free pellet dosing process.