Introduction to Vacuum Infusion Process

Vacuum Infusion (also known as VARTM, SCRIMP, VIP or various other abbreviations) is a lamination process for producing fiber reinforced plastic (FRP) parts.

Dry materials (felt, fabric, stitched felt and foam core) are stacked on a male or female mold surface and sealed around the perimeter of the part using a thin plastic vacuum bag or semi-rigid counter mold.

A vacuum pump is used to evacuate the material and apply atmospheric pressure to compact the dry materials and create a “vacuum gap”. Resin is then injected into the gap through strategically placed resin injection pipes.

The pressure difference between the vacuum gap and the external atmospheric pressure forces the resin in, injecting it into the porous material until it is completely infiltrated. The vacuum is maintained until the part cures to ensure density.

Particularly suitable for the production of stable, high-quality, large, complex products, such as large luxury yachts, high-speed boats, racing boats and wind turbine blades, and can also combine sandwich materials or embedded parts.

Advantages of Resin Infusion Process

Increased reinforcing fiber content and better mechanical properties

Uniform pressure on the system and more uniform product performance

Improve production repeatability and reduce the number of defective products

Effectively control product glue content and product thickness

Eliminate defects such as dry plates and pores in products

Stronger bonding between core materials and panels

Low volatile release and improved working environment

Reduce labor costs for making large parts and achieve more reasonable cost manufacturing

Vacuum Assisted Molding Materials

Vacuum Bag Film

 Isolation Film

Breathable Felt

Release Cloth

Diversion Network

Sealing Tape

Flow Tube

Spiral Tube

Tee Pipe

Resin Collector