Vacuum Casting (also named Polyurethane Casting) is a high efficient manufacturing process for low volume parts and rubber parts that could not be CNC milled. Firstly, place a master model made by CNC or SLA/SLS into a box, then pour the debubbled liquid silicone rubber into the box to fully cover the master model, after that cure the liquid silicone rubber by heating in oven, finally remove the box and split the cured silicone rubber to take out the master model and form the silicone rubber mold for vacuum casting.
Vacuum Casting sends a variety of benefits including: economical and rapid tooling, wide material options, desired surface finishings (color, texture, gloss) or hardness in mold cavity without the further finishing work. One silicone rubber mold usually casts 10-25 parts that depends on the part material and geometry, the casting tolerance is ± 0.15/100 mm. At Honkia, we use the vacuum casting materials from Hei-Cast (Japan) and Axson (France) for their material properties of well-controlled shrinkage and debubbling.
The Hei-Cast and Axson Vacuum Casting Resins We Have Used:
Hei-Cast 8150: ABS, white/black/beige, fast solidified;
Hei-Cast 8263: ABS, milky white, flame retardant;
Hei-Cast 8400: Rubber, black/withe, hardness shore A 20-90;
Hei-Cast T0387: Rubber, transparent, hardness shore A 30-80;
Hei-Cast 8570: PP, black/white, tunable elasticity;
Hei-Cast 8015: ABS, transparent;
Hei-Cast 8752: PC, transparent;
Hei-Cast 8743: PMMA, transparent.
Axson PX5212: PMMA, high transparent, UV aging resistant;
Axson PX5210: PMMA, transparent, UV aging resistant, high-temperature resistant;
Axson PX527: PC, transparent, high shock resistant;
Axson PX223: ABS, black, high-temperature resistant, erosion resistant;
Axson UP6160: ABS, translucent, high-temperature resistance, high casting tolerance;
Axson UP5690: PP, black/white, high strength and extensibility;
Axson 4280: ABS, black/white/of white, high-temperature resistance, easy coloration.