MEGA GOSSAU AG is a leading Swiss manufacturer in metal die casting and architectural hardware, headquartered in Gossau, Canton of St. Gallen. Founded in 1933 as Metallgarnitur GmbH, the enterprise operates with approximately 120 employees across modern facilities in Gossau.
The company combines technical engineering, in-house mold and toolmaking, high-precision zinc and aluminum die casting, and comprehensive surface finishing operations under one roof, utilizing lean manufacturing principles.
Alongside custom industrial castings for automotive, pneumatics, machinery, and medical devices, MEGA GOSSAU AG develops and produces door, window, and security hardware systems, incorporating recycled Swiss zinc from urban mining initiatives.
MEGA GOSSAU AG provides full-cycle engineering, die casting, and surface finishing services:
- Zinc Die Casting: High-speed hot-chamber die casting of complex, thin-walled zinc components (Zamak alloys) achieving tight dimensional tolerances and superior surface finishes for technical and aesthetic parts.
- Aluminum Die Casting: Cold-chamber die casting (e.g. EN AC-46000 / GD-AlSi9Cu3) engineered for lightweight components requiring high rigidity, thermal conductivity, and structural performance.
- Engineering & Simulation: Part optimization for casting, finite element method (FEM) structural analysis, and mold-filling simulation using MAGMASOFT.
- In-House Toolmaking: Manufacturing, maintenance, and modification of casting molds, trimming dies, and inspection gauges via CNC milling, turning, sinker EDM, and impulse welding.
- Mechanical Processing: CNC milling, drilling, tapping, and automated multi-axis machining from individual components to high-volume runs.
- Surface Finishing & Electroplating: Comprehensive in-house electroplating (galvanic nickel, chrome, velour, and brass plating), vibratory grinding, brush finishing, bead blasting, and automated polishing.
- Assembly: Assembly of submodules and complete mechanical assemblies.