Vacuum Casting begins by producing a master model, typically using Stereolithography or Laser Sintering, with a high-quality surface finish. A silicone mold is then created by casting silicone around the master copy, partially under vacuum to avoid air bubbles. After curing, the silicone mold is cut according to predefined parting planes, and the master is removed, leaving a cavity to make copies.
Type of Casting Technology:
Vacuum Casting
Materials
Vacuum Casting materials can simulate various production materials and properties:
- Rubber: High flexibility
- ABS : High rigidity and strength
- Polypropylene and HDPE: High elasticity
- Polyamide and glass-filled nylon: High rigidity
- Polycarbonate and PMMA : Shock resistance, translucence, high-temperature resistance
- Filled ABS : Fire resistance and retardant
Dimensional Accuracy
±0.3% (with a lower limit of ±0.3 mm on dimensions smaller than 100 mm)
Minimum Wall Thickness
At least 0.75 mm for proper mold filling, with 1.5 mm recommended for best results
Surface Structure
High-quality surface finish comparable to injection molding
Applications of CFD:
Functional parts
Complex ducting
Low-run part production
Up to 20 copies per mold (depending on the mold’s complexity and the casting materials)
Strengths
1. Functional parts with good mechanical properties
2. Capable of producing complex geometries
Pre-launch product testing
Small series of housings
Concept models
Complex prototypes
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