Grunewald, a family-owned business with three production sites in Germany, has built an extensive reputation in low-pressure sand casting, toolmaking, and machine building. They specialize in designing, engineering, and manufacturing solutions, offering capabilities in casting, milling, assembly, and qualification.
Grunewald’s expertise lies in the low-pressure sand casting of aluminum components, such as body structures, chassis, and engines. The company is adept at melting and casting various aluminum and iron alloys, providing flexible solutions for diverse applications.
By utilizing FEM simulation modeling, Grunewald can predict and optimize casting processes, including mold filling, solidification, residual stresses, shrinkage, and distortion, ensuring precise and high-quality results.
With two advanced 3D sand printing machines (ExOne S-Max KHP), Grunewald produces sand molds and cores quickly and efficiently. They also use H2O black wash for optimal surface quality and aluminum silicate savings.
Grunewald's expertise extends to producing large, highly integrated parts with wall thicknesses as thin as 2mm, using the low-pressure casting principle. This method ensures a quiet, laminar flow for mold filling, controlling shrinkage and pressure to achieve repeatable, high-quality results.
The company offers a comprehensive, one-stop solution, including heat treatments for non-self-hardening aluminum alloys, precision straightening for perfect geometric shapes, and NC-machining for post-casting activities like measurement and qualification.
Grunewald’s state-of-the-art facility features advanced molding and regeneration technology, an energy-saving air conditioning system with recirculation and heat recovery, and a highly effective dust filtration process. The clean air emitted is often purer than the surrounding environment, supporting a sustainable manufacturing approach.
Additionally, Grunewald's thermal sand regeneration process allows for 95% reuse of mold sand, reinforcing their commitment to sustainability.
Grunewald is certified in:
- DIN EN ISO 50001
- DIN EN ISO 14001
- DIN EN ISO 9001
