Similar to closed-mold injection, the RTM machine drives mixed, air-free resin at low to relatively high injection pressures into closed molds containing high fiber content layups. The RTM machine’s on-ratio mixed material pressure forces the air ahead of the mixed material, wetting the composite preform fibers, while running the air-free resin through thin mold cross-sections to small air vent holes at far side of the mold. LRTM or Light RTM utilizes low-pressure resin injection and light-weight tools. RTM and LRTM typically allow a 30% fiber to resin ratio. Vacuum can be applied to RTM molds to assist in resin transfer.

Products Manufactured — with this application:
  • Wind Turbine Blades
  • Composite Parts
  • Missile and Missile-Launcher
  • Components
  • Radomes
  • Golf Club Shafts
  • Telephone Poles
  • Composite Panels
  • Airfoils
  • Bicycle Frames & Parts
  • Boat Hulls, Tubs, Canoes
  • Helmets
  • Car Bodies
  • Low Void Content Parts
Reactive Thermoset Resins Processed - (Epoxies, Polyurethanes, Polyesters, Vinyl Esters, Silicones and Polyimids):
  • Unfilled, Reactive Thermoset Resins
  • Heated or Room-Temperature
  • 2 to 8 – Metered Components
Industries Using These Resin Dispensing Machine Processes:
  • Wind Energy
  • Marine
  • Medical
  • Industrial
  • Recreational
  • Automotive
Each of these DeSantis Mechatronics Dispensing Systems optionally include:
  • Programmed PLC or PC-Controllers with Touchscreen Interface
  • Digital User-Presets for Ratio, Shot-Size, Output-Rate, Temperatures, Vacuum Levels and Mixer Speed.
  • Batch Material Preparation Tanks – apply heat, agitation and vacuum to the materials in batches
  • or Continuous Thin Film Degassers – heat, agitate and degas materials on-the-fly.
  • Rotary Gear Metering Pumps or Piston Metering Pumps
  • Digital, Servomotor Drives for the Metering Pumps or Wedge-Driven Piston Metering Pumps
  • Mass Flowmeters or Mechanical Flow Meters
  • Static or Dynamic Mixers
  • Purge Systems
  • Data Loggers
  • Vacuum Pumps
  • Vacuum Control System – for precise vacuum level control in the degassing tanks and in the RTM mold.
  • Transducers – monitor and digitally control mixed resin pressure in the mold.

Learn how any of these systems can work for your RTM application.