Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Vacuum casting with silicone typically refers to using silicone molds in a vacuum casting process to produce high-quality, precise parts, often from materials like polyurethane resins, plastics, or sometimes low-melting-point metals. Since your previous question mentioned aluminum, I’ll clarify that silicone molds are rarely used for casting aluminum due to the high melting point of aluminum (~660°C), which exceeds the thermal limits of most silicone materials (usually <300°C). Instead, silicone molds are ideal for prototyping and low-volume production of plastic or resin parts. Below is a concise overview of vacuum casting with silicone molds, tailored to your context:

Process:

Master Pattern Creation: A high-precision master model is made (e.g., via 3D printing or CNC machining).

Silicone Mold Making: Liquid silicone is poured around the master pattern in a vacuum chamber to remove air bubbles, then cured to form a flexible mold.

Vacuum Casting: The silicone mold is placed in a vacuum casting machine. Resin (or occasionally low-melt alloys) is mixed, degassed, and poured into the mold under vacuum to eliminate air pockets.

Curing and Demolding: The material cures (resin typically takes 30-60 minutes), and the part is removed from the flexible silicone mold.

Vacuum casting is very advantageous for small batch production.