Preform
Woven, stitched, unidirectional or 3D reinforcement stabilized to shape.
Resin transfer molding (RTM) places a dry fiber preform inside a rigid two-sided mold, closes and clamps the tool, then injects low-viscosity resin before curing. It is used for repeatable complex parts requiring controlled thickness and finished surfaces on both sides.
The mold cavity fixes geometry while the matched permeability of the preform, vent layout and injection strategy determines whether resin reaches every region before gel.
Cut, shape and stabilize reinforcement, core and local inserts.
Position the preform in the prepared cavity and close the matched tool.
Meter, mix and condition the injection resin system.
Drive resin through the preform while displaced air exits the planned vents.
Hold the validated cure, open the tool and finish the molded part.
Woven, stitched, unidirectional or 3D reinforcement stabilized to shape.
Low-viscosity thermoset formulated for injection and the selected cure window.
Compatible closed-cell core and positively located hardware where designed.
Rigid matched mold, seals, ports, vents, heating and clamping.
A supplier claim is useful only when the process window is tied to the offered material, tooling, drawing revision and production batch.
| Stage | What must be controlled | Evidence to request |
|---|---|---|
| Preform | Material, architecture, compaction and permeability. | Kit traceability, preform traveler and weight/thickness checks. |
| Injection setup | Resin ratio and state, tool temperature, ports, vents and vacuum. | Approved recipe and pre-injection checklist. |
| Fill | Pressure-time trace, vent behavior and complete resin arrival. | Injection log and alarm/deviation record. |
| Release | Cure, dimensions, surface and internal discontinuities. | Cure record, inspection report and qualified NDT where required. |
Likely cause: Race tracking, low permeability, closed vent or resin gel before complete fill.
Detection: Visual/thermographic process monitoring, ultrasound or sectioning.
Likely cause: Air entrapment, leaking mix, inadequate degassing or volatile release.
Detection: Ultrasound, microscopy or density/section checks as specified.
Likely cause: Injection force moves fibers or inserts.
Detection: Witness features, imaging, thickness and fiber-orientation review.
This guide uses the JEC process taxonomy, CAMX/ACMA/SAMPE review framework and process-specific material from industry associations, national research centers or government laboratories. Sources explain the process; they do not endorse listed suppliers.
Industry-level process taxonomy covering RTM, infusion, pultrusion, winding, fibre placement and additive manufacturing.
Peer-reviewed conference framework for manufacturing, processing, NDE and testing topics.
Dry preform loading, closed-tool injection, vacuum assist and cure sequence.
Reviewed 16 August 2026. Verify current standards editions, material datasheets and project-specific acceptance requirements before award.
Only approved supplier submissions appear here. Pending, rejected and demo rows are excluded from public queries and sitemap output.
Browse the reviewed supplier profiles above or submit an RFQ. GetFRP does not fill empty categories with synthetic products.
RTM normally injects resin into a rigid matched mold, while vacuum infusion uses a flexible bag over dry reinforcement and vacuum-driven flow. RTM offers two tool-controlled surfaces; infusion favors larger parts and lower tooling cost.
At minimum, record preform and resin lots, tool and recipe identity, resin mix state, tool temperature, injection pressure/time, vent events, cure cycle and final inspection results.
Not automatically. Fiber format, binder, architecture, compaction and splices affect both structural performance and resin flow, so material or preform changes need controlled engineering review.
Send one controlled specification. GetFRP checks the matching public network without inventing supply records.
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