Shell moulding
Shell moulding is a metal casting process that uses a mixture of resin-coated sand, known as shell sand, to create moulds. The process involves pre-heating the pattern, placing it in a metal flask, and then filling the flask with the shell sand mixture. The heated pattern quickly cures the sand, forming a rigid shell around it. After the pattern is removed, the shell mould is ready to be filled with molten metal, resulting in more precise and dimensionally accurate products compared to sand casting products.
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Benefits of shell moulding
- High Precision: Compared to sand casting, shell moulding offers precise dimensional accuracy, often eliminating the need for extensive post-casting machining.
- Smooth Surface Finish: Compared to sand casting, this process results in components with a refined surface, reducing the need for additional finishing steps.
- Consistent Quality: Shell moulding provides uniform and repeatable results, crucial for maintaining product specifications.
- Quick Production: Shell moulding allows for rapid production, making it suitable for both small and large quantities.
TECHNICAL SPECIFICATIONS
| Material: | Steel, stainless steel, cast iron, non-ferrometals |
|---|---|
| Tolerance / standard: | CT10 according to ISO 8062 (wall thickness CT11) |
| Surface roughness: | Ra 25 µm – Ra 50 µm |
| Minimum wall thickness: | 4 mm |
| Weight: | 0.2 – 75 kg |
| Maximum dimensions: | 800 x 800 x 300 mm |
| Shape complexity | Medium to high |