EM-FIBERGLAS A/S
Resin Transfer molding for composite parts with precise quality
Vacuum infusion for series where strength and finish must be stable
Are you faced with choosing a process with stable quality in your composite parts? Resin infusion molding – also called vacuum infusion – provides a uniform structure, short cycle time and high finish. Vacuum infusion process precisely controls the resin flow so that each fiber is impregnated evenly throughout the laminate.
The process is particularly used for fiberglass and fiberglass-based composites, where a dense and uniform structure is crucial for strength and finish.
RIM is a dual-mold process where dry fibers are placed in a mold and the resin is pressed in under controlled pressure. The heating reduces cycle time and creates a stable laminate with minimal variation. The method is used when infusion molding composites need to achieve low weight, high strength and a uniform material structure with controlled tolerances.
The vacuum removes air inclusions and ensures even wetting. We work with fixed parameters for vacuum, resin flow and curing times, so that quality and tolerances can be documented precisely. The long life and short cycle of the molds make the process efficient in large series, especially in the automotive industry.
6 benefits when you choose us for resin infusion molding
When you choose resin infusion molding from us, you get a process with documentable quality and stable results, where both material structure and production are optimized for technical requirements.
- Good strength properties
- High surface quality on both sides
- Uniform quality and thickness
- Long life of molds
- Short processing time in large series
- Possibility of sandwich constructions
Over 50 years of experience
We have many years of experience and deep knowledge within composite materials, so you get the best solution for your needs.
Flexible production
We adapt materials and processes so you get exactly the combination of strength and weight you need.
Quality and safety
For us, quality and safety are paramount, and we always ensure durable and reliable solutions.
Vacuum infusion in productions with high quality requirements
Vacuum infusion is a controlled process where pressure, temperature and resin flow are precisely controlled to ensure a uniform and reliable material structure. The method produces a strong and stable laminate, suitable for components with repeated loads, high visual requirements or the need for low weight without compromising strength. The vacuum draws the resin through the fibers and minimizes air pockets, resulting in a homogeneous structure and high finish.
Compared to Resin Transfer Molding ( RTM molding ), vacuum infusion provides greater flexibility in large and complex fiberglass structures, while RTM is typically used when a similar finish is desired on both sides of the part.
We document all relevant process parameters throughout the entire process, giving you full insight into the quality and structure of the material. This transparency makes it possible to validate both design and production technically, which is crucial in industries where traceability and documentable results are part of the requirements.
FAQ
– answers to the most frequently asked questions about resin infusion molding
How do you create a vacuum?
Vacuum is created by removing air from the closed mold, reducing the pressure. This allows the resin to move into the fibers and create a uniform structure.
How does vacuum in infusion work?
Vacuum acts as a driving force and pulls the resin through the laminate. This reduces air inclusions and ensures stable and documentable quality.
How does resin infusion molding differ from RTM?
Infusion uses foil and vacuum for impregnation, while RTM uses a fixed back mold and controlled injection. Infusion is suitable for large and complex components, while RTM provides the same finish on both sides.
What types of materials are best suited for infusion?
Infusion is typically used with glass fibers, carbon fibers, and lightweight core materials. Combined, they provide a laminate with low weight and high strength.
Resin infusion molding with a focus on finish – contact us today
Resin infusion molding provides uniform and documentable quality, where strength, finish and cycle time are combined in one efficient process. With more than 40 years of experience, we can help you safely from design to finished composite part.
Call +45 75 68 73 11 or write to emfiber@em-fiberglas.dk.
Get in touch today – and experience the difference.
Write to EM Fiberglass
Inquiries will be answered within two business days.