Composite Industry Equipment · Code: GJ-RTM-250
Compact Low-Pressure RTM Injection Machine
A two-component RTM injection machine that meters and mixes resin and hardener dynamically, then injects them under vacuum into a closed mold to produce composite parts for aerospace, automotive and wind energy applications.
- Dynamic two-component metering, mix ratio deviation ≤1.5%
- Vacuum-assisted injection for void-free closed-mold parts
- Siemens PLC + servo drives for stable process parameters
- IoT cloud platform for remote production monitoring
- Modular design, capacity scaled to your needs
- Automatic line cleaning for fast material changes
Overview
The Compact Low-Pressure RTM Injection Machine is a two-component automated dosing system built for closed-mold Resin Transfer Molding. It meters resin (Part A) and hardener (Part B) dynamically, mixes them precisely, and injects the blend at low speed under vacuum into a closed mold, where it fully wets out the fiber preform and cures. Compared with hand lay-up and open pouring, RTM delivers low porosity, stable dimensions and smooth surfaces on both faces — ideal for aerospace, automotive and wind energy parts that demand consistent quality.
Advantages
- Accurate metering: dynamic two-component dosing holds mix ratio deviation to ≤1.5% for batch-to-batch consistency;
- Vacuum assisted: the mold and material are degassed before injection, and closed-mold molding eliminates voids and dry spots;
- Low-pressure injection: up to 0.25 MPa, gentle on mold seals and fibers — well suited to large thin-wall parts;
- Smart control: Siemens PLC with Schneider servo drives; process curves can be stored and traced;
- Cloud connectivity: links to an IoT cloud platform that uploads temperature, pressure, flow and output in real time for remote service;
- Modular expansion: tanks, pump sets and mixing unit are modular, so capacity can be scaled up or down as needed.
Process
- Preparation: Part A and Part B are stored in separate 30 L SUS304 tanks with stirring and temperature-controlled conditioning;
- Metering: high-pressure dual-cylinder reciprocating piston pumps deliver each component at the set ratio with ≤±0.01 error;
- Mixing: the components pass through a static mixer and enter the injection unit;
- Vacuum: after the mold closes, a 40 m³/h vacuum pump evacuates the cavity and the material to remove air;
- Injection: the mixed material is injected at low pressure under vacuum to fully wet out the fiber preform;
- Curing and cleaning: after pressure-hold curing, the mold opens and the part is removed; an 8 L automatic cleaning tank flushes the lines for the next run.
Specifications
| Dimensions | Approx. L1100 × W1500 × H1500 mm |
| Weight | Approx. 400 kg |
| Power | 380 V / 50 Hz, approx. 7 kW |
| Control system | Siemens PLC + touchscreen |
| Tank capacity | 30 L × 2 (SUS304) |
| Metering pump | High-pressure dual-cylinder reciprocating piston pump (Schneider servo, error ≤±0.01) |
| Mixing method | Static mixer |
| Mix ratio | 100:5 – 100:100 |
| Injection flow | 0 – 2 kg/min |
| Injection pressure | Up to 0.25 MPa |
| Temperature range | Ambient – 120 ℃ (±2 ℃, Omron) |
| Pneumatic components | SMC |
| Vacuum pump | 40 m³/h (vacuum degassing + assisted injection) |
| Cleaning tank | 8 L automatic cleaning |
Applications
Designed for closed-mold RTM, the machine suits composite parts that demand light weight, high strength and excellent surface quality:
- Aerospace: wing ribs, interior panels, UAV frames, satellite structures;
- Automotive: battery housings, body structure parts, exterior panels;
- Wind energy: blade roots, nacelle covers, insulating components;
- Sports and leisure: skis, helmet shells, cycling gear.
Customization & Service
Free process trials are available, along with one-stop support from fiber matching and mold evaluation to equipment customization, installation and commissioning. A dedicated service team responds quickly to keep production running continuously and reliably.
| Category | Specifications |
|---|---|
| Dimensions | Approx. L1100*W1500*H1500mm (main unit) |
| Weight | Approx. 400Kg |
| Power supply | 380V 50Hz (customer supplied) |
| Power consumption | Approx. 7Kw |
| Air supply | 0.5-0.8MPa (customer supplied) |
| Frame and finish | Painted steel frame with movable casters and brakes |
| Control system | Siemens PLC controller and HMI |
| Feed system | 30L*2, SUS304 stainless steel |
| Metering system | Schneider servo motors and precision gear metering pumps, metering error ≤±0.01 |
| Mixing system | Custom extended metal static mixer with circulation, for 100% uniform mixing |
| Mix ratio | 100:5-100:100, set and adjusted directly on the PLC touchscreen (customizable) |
| Flow rate | 0-2Kg/min, set and adjusted directly on the PLC touchscreen (customizable) |
| Temperature control | Omron precision temperature control with PDI intelligent regulation, adjustable from ambient to 120℃, error ≤±2℃; Part A and B tanks and feed lines are heated and insulated. Tanks use heat-transfer oil circulation heating; feed lines use wrapped electric |
| Pneumatic system | SMC pneumatic components for long-term reliable operation |
| Level display | Transparent Teflon level tube shows the material level in the tank |
| Level monitoring | High and low level sensors monitor material in the tank in real time; low level triggers an alarm to refill, high level alarms and stops filling automatically. |
| Stirring (Part A) | Electric variable-speed paddle stirrer prevents settling and keeps tank temperature uniform |
| Auto circulation | Both Part A and B feature auto circulation: when the machine stops, material circulates back through the lines to keep temperature uniform and line pressure stable |
| Pressure monitoring | Pressure sensors on the Part A and B metering systems and the mixing head monitor and display injection pressure in real time |
| Vacuum | Busch rotary vane vacuum pump with 40m³/h pumping speed for vacuum degassing and vacuum-assisted injection |
| Auto cleaning | 8L stainless steel cleaning agent tank, three-stage one-touch high-pressure automatic cleaning |
| Auto alarm | Automatic alarm on fault, with the cause shown in real time on the PLC touchscreen |
Specifications may change according to order configuration. Please confirm in the official quotation.
Suitable materials
- Epoxy resin: matrix for composite parts such as aerospace structures and wind blades
- Vinyl ester / unsaturated polyester: automotive panels, UAV frames
- Polyurethane: lightweight sandwich structures
Typical applications
Built for closed-mold Resin Transfer Molding (RTM), the machine is widely used for high-volume, high-quality composite parts in aerospace (wing ribs, interior panels, UAV frames), automotive (battery housings, structural parts), wind energy (blade roots, nacelle covers) and sports and leisure (skis, helmet shells).
Operating video for this machine is being updated. See more real machine-running videos in our video library.
View all videosRequest a detailed quote for this machine
Fill in complete information so we can propose the right configuration. We typically respond within 12 hours with a price list and estimated delivery time.
