Gravity Die Casting
Gravity die casting fills a reusable steel or cast-iron mould under gravity rather than at high pressure. Tooling is simpler and cheaper than a high-pressure die, gas porosity is lower than sand casting, and the process suits medium volumes of parts with thicker walls or where heat treatment is needed.
対応内容
Permanent steel and cast-iron moulds with long life
Permanent steel and cast-iron moulds with long life
Lower tooling cost than high-pressure die casting
Lower tooling cost than high-pressure die casting
Lower porosity than sand casting
Lower porosity than sand casting
Heat-treatable castings without blistering
Heat-treatable castings without blistering
Inserts and cores placed before pouring
Inserts and cores placed before pouring
Economical from about 1,000 pieces per year
Economical from about 1,000 pieces per year
材料
| Aluminium LM6, LM25, A356 |
| AlSi10Mg and AlSi12 |
| ADC12 for general parts |
| Zinc Zamak 3 and 5 |
| Gunmetal and bronze |
| Brass for decorative parts |
主要仕様
| 項目 | 詳細 |
|---|---|
| Materials | Aluminium and zinc alloys |
| Tool lead time | 20–35 days |
| Wall thickness | 3–20 mm |
| Tolerance | ISO 8062 CT6–CT8, machined ±0.05 mm |
| Quantity | 1,000+ pcs per year |
| Porosity | Lower than sand casting, verified by X-ray on request |
表面処理・後加工
Machining of sealing and bearing faces
Machining of sealing and bearing faces
Anodizing and hard anodizing
Anodizing and hard anodizing
Powder coating and painting
Powder coating and painting
Impregnation for pressure tightness
Impregnation for pressure tightness
よくあるご質問
Gravity or high-pressure die casting?
Gravity suits thicker walls, heat-treated parts and lower volumes because tooling is cheaper. High-pressure wins for thin walls, tight tolerance and high volumes where cycle time dominates.
Can gravity castings be welded?
Yes, with matching filler and appropriate preheat. Porosity level is low enough that TIG repair and joining both work on gravity castings, unlike many high-pressure parts.
What wall thickness is realistic?
Between 3 and 20 mm. Thinner walls run the risk of cold shuts because the metal fills under gravity alone, which is the main reason high-pressure casting exists.