At Astromal, the vacuum infusion process is our primary technology for manufacturing high-performance, large-scale composite structures. This advanced liquid molding technique, also known as VIP or Light RTM, uses vacuum pressure to drive resin into a complex laminate stack. By precisely controlling the environment, we ensure perfect fiber wetting and superior mechanical properties that outperform traditional hand lay-up methods.
Advanced Vacuum Infusion Process (VIP) for Industrial Composites
Why Engineers Specify Vacuum Infusion Process (VIP)
Why Engineers Specify Vacuum Infusion Process (VIP)
For technical projects requiring high structural integrity, the vacuum infusion process offers unmatched advantages:
Optimal Fiber-to-Resin Ratio: Achieve maximum strength with minimum weight – a critical requirement for the railway, marine, and transport sectors.
Superior Consolidation: Continuous vacuum pressure ensures a compact laminate with significantly higher mechanical strength.
Zero Porosity: Our VIP expertise eliminates air voids, ensuring long-term durability and resistance to fatigue in harsh industrial environments.
Large-Scale Capability: We specialize in infusing complex, oversized components with integrated stiffeners and core materials (sandwich structures).
Seamless Integration from Mold to Finished Part
Our vacuum infusion process is a key stage of our integrated production cycle. It follows our precision CNC Tooling and Mold Making phase, ensuring that the final composite part matches the digital CAD model with extreme accuracy. By utilizing closed-mold VIP technology, we also significantly reduce styrene emissions, providing a cleaner and more controlled manufacturing environment.
When Should You Use Vacuum Infusion (VARTM)?
Vacuum infusion (VARTM) is best suited for manufacturing large composite structures with high fiber content and reduced weight. It is commonly used when lower tooling costs are required compared to RTM, while still maintaining good mechanical performance and surface quality.
Vacuum Infusion vs Hand Lay-Up
Vacuum infusion offers better control over resin distribution and higher fiber content compared to hand lay-up. While hand lay-up is more flexible and suitable for very large or custom structures, vacuum infusion provides improved consistency and mechanical performance.
| Property | Vacuum Infusion (VARTM) | Hand Lay-Up |
|---|---|---|
| Resin Control | High | Manual / variable |
| Fiber Content | Higher | Lower |
| Consistency | Good | Dependent on operator |
| Tooling Cost | Moderate | Low |
| Best Use Case | Large, repeatable structures | Custom, low-volume parts |
Technical Resources:
For more information on the latest industry standards, you can explore professional insights on liquid resin infusion technologies and their impact on modern composite manufacturing.
For more information on the latest industry standards, you can explore professional insights on liquid resin infusion technologies and their impact on modern composite manufacturing.
Resin Infusion
Once the vacuum is generated, the mould is filled with the appropriate resin through dedicated channels or openings. The vacuum created inside the mould draws the resin through the reinforcement layers, ensuring proper impregnation of the laminate structure.
Advantages of the VARTM Method
- relatively low production start-up cost compared to RTM technology (but higher than starting hand lay-up production),
- the method is cost-effective for medium-volume production,
- the products can be fitted with additional inserts and reinforcements (metal inserts, PU foams, spacers, etc.),
- good air removal in the laminate structure,
- possibility of producing parts with variable wall thickness,
- low emissions of volatile substances into the environment.
Compared to the hand lay-up method:
- superior product quality and more uniform laminate structure,
- higher density and improved mechanical properties,
- higher glass content and improved product durability,
- smooth surface finish on both sides,
- improved process efficiency.
Looking for Vacuum Infusion (VARTM) Manufacturing?
If you are considering vacuum infusion for your composite project, Astromal provides full support from design and tooling to production. We help determine the most efficient manufacturing method based on your technical and production requirements.ty.
Contact Astromal to discuss your composite project.