Sand Casting
Sand casting forms a mould from bonded sand around a pattern, so the mould is destroyed with each pour and there is no size ceiling. It is the process for large, heavy or one-off castings, and it accepts shapes that neither forging nor fabrication can produce economically.
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Ce que nous faisons
Part weight from 1 kg to 500 kg
Part weight from 1 kg to 500 kg
Aluminium, iron, bronze, brass and steel
Aluminium, iron, bronze, brass and steel
Wood, resin or 3D-printed patterns
Wood, resin or 3D-printed patterns
Green sand and resin-bonded sand moulds
Green sand and resin-bonded sand moulds
Low tooling cost suitable
Low tooling cost suitable for one-off parts
Machining of critical features after casting
Machining of critical features after casting
Matériaux
| Aluminium and aluminium alloys |
| Grey and ductile iron |
| Bronze and brass |
| Carbon and low-alloy steel |
| Stainless steel |
| Magnesium on request |
Spécifications clés
| Spécification | Détails |
|---|---|
| Part weight | 1–500 kg |
| Pattern lead time | 10–20 days |
| Tolerance | ISO 8062 CT8–CT12 |
| Min wall | 4 mm typical, more for iron |
| Surface | Ra 12.5–25 µm as-cast |
| Quantity | 1 piece to hundreds |
Finitions de surface & post-traitement
Shot blasting and shot peening
Shot blasting and shot peening
Machining of mating faces
Machining of mating faces
Painting and coating
Painting and coating
Heat treatment and stress relief
Heat treatment and stress relief
Questions fréquentes
When should I use sand casting?
When the part is large, heavy or needed in very low quantity. Above about 1 kg and below a few hundred units per year it is usually cheaper than die casting because pattern cost is low.
Can you machine the casting afterwards?
Yes, and it is normally essential for datums, bores and sealing faces. We plan machining stock into the pattern so features come out on size first time.
How do you handle porosity in sand castings?
By designing generous feeders and risers, controlling pour temperature and where necessary impregnating or weld repairing. X-ray and dye penetrant checks confirm acceptability for critical parts.
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