Precision Casting
The casting method of choice for complex components.
The Exacast® ceramic precision casting process is an interesting alternative to casting methods like investment casting and shell moulding. The Exacast Process was developed by Wolfensberger and registered under the Exacast® brand name. As the name suggests our precision casting process allows for the accurate casting of complex components. Reusable patterns made of plastic, metal, wood or silicone rubber are coated with a quick-hardening ceramic and then fired. The alloy that is then cast into the preheated moulds is able to flow into extremely thin walled sections. A wide choice of steel and cast iron alloys can be cast as per customer requirements.
Our Strengths – Your Benefit
The Process For Complex Castings.
- First-class surface roughness: N8/N9 (Ra 3.2 - 6.3 µm)
- Tolerances in accordance with VDG instruction sheet P 690 for investment casting
- Radii > R 0.2
- Large wall thickness differences possible
- Weight of parts 2 to 400 kg
- Size of parts up to 1000 x 1000 x 400 mm
- Up to 100 cast iron and steel materials
Tolerances In The Exacast® Precision Casting Process.
The tolerances for Exacast® precision casting are based on VDG instruction sheet P 690 for investment casting. The tolerances specified in the sheet can be largely complied with. The only non-compliance that occurs relates to the non form-bound dimensions, for example over the mould partition or from the core mould to the outer mould, and even these do not exceed D1 in VDG standard P 690. If the precision casting tolerance is not adequate, a machining allowance must be added .
