Aluminum die casting manufacturers need refractory solutions that help produce consistent, high-quality, cast products for a wide variety of industries including automotive, consumer electronics, and healthcare.
Die Casting Refractory Solutions
Refractory choices are critical to product consistency in die casting. HarbisonWalker International provides tailored solutions for refractory linings to ensure that furnaces operate at the specified temperature to produce a quality part with tight tolerances and good surface finishing.
HWI services both types of die casting: hot-chamber and cold-chamber die casting. While similar die assemblies are used, refractory choices may differ due to alloys melted and process complications associated with each type.
Hot-chamber die casting uses high pressures to inject molten aluminum into a mold. Metal is transported from a separate furnace, so alloys with lower melting temperatures can be used (zinc, magnesium, and copper). These alloys are less aggressive to the injection equipment.
Cold-chamber die casting uses a refractory lined ladle to transport the molten aluminum from a melting furnace directly into a shot chamber or injection cylinder. Contact time between the hot metal and the injector components requires the refractory lining to withstand constant thermal cycling.
We provide several products to meet your die casting manufacturing needs, including our popular castable EXPRESS® ARMORKAST 80 AL MAX, which was designed to produce a smooth, hot face surface.
Benefits of HWI Firebricks and Castables for Die Casting
- Thermal shock resistance
- Consistent thermal reliability
- High temperature stability and structural integrity
- Reduced energy consumption
- Increased production efficiency and service life time
- High abrasion resistance
- Resistance to corundum formation
- Minimal shrinkage at operating temperatures
Featured Die Casting Products
WM-7774 (ARMORTECH MW 65 AL): Unusually high strengths for an insulating, non-wetting product makes this an excellent choice for die cast holders and crucibles, where additional thermal efficiencies are required. The 65% alumina low cement castable combines the advanced aluminum resistance of ARMORTECH with HWI’s unique lightweight GREENLITE® aggregate to offer a semi insulating, aluminum resistant product.
EXPRESS ARMORKAST 80 AL MAX: A low cement, 80% alumina castable designed with enhanced flow and self-leveling characteristics. This product offers great strength and aluminum resistance, as well as a superior surface finish when cast into intricate forms.
PLASTECH® 85P STD : A 3100°F bauxite based refractory plastic offering excellent abrasion resistance, alkali resistance and extended shelf life. PLASTECH reliably offers consistent pliability for 9 months, or 2x longer than conventional plastics.
GREENKLEEN®-60 PLUS: A 60% alumina, andalusite containing castable that has excellent resistance to molten aluminum, thermal shock resistance and alkali resistance. This product has been a maintenance favorite and problem solver due to its rare combination of properties and versatility.