What are the differences between vacuum infusion and resin transfer molding for pots?

When it comes to potting techniques in composite manufacturing, vacuum infusion (VI) and resin transfer molding (RTM) are two prominent methods. While both involve injecting resin into a mold, they differ significantly in process and application.

Vacuum Infusion (VI):

- Uses a vacuum to draw resin into a dry fiber preform.

- Ideal for large, complex parts with low to medium production volumes.

- Lower tooling costs but requires precise control of resin flow.

Resin Transfer Molding (RTM):

- Involves injecting resin under pressure into a closed mold.

- Better suited for high-volume production with consistent part quality.

- Higher tooling costs but offers faster cycle times.

Key Differences:

1. Pressure: VI relies on vacuum pressure, while RTM uses mechanical pressure.

2. Cost: VI is cheaper for prototyping; RTM is cost-effective for mass production.

3. Precision: RTM provides tighter tolerances and better surface finish.

Choosing between VI and RTM depends on project scale, budget, and desired part quality. For pots, VI may be preferred for custom designs, while RTM excels in standardized production.