C-RTM Process

C-RTM Process: Large Composite Parts with a Cycle Time of Two Minutes

C-RTM (compression resin transfer molding) is a process that enables the production of structural parts in high-performance composites with a cycle time of two minutes.

In 2017, the C-RTM process won the JEC Group Innovation Award.

Process

Rapid press closing at a precise interval, vacuum is created in the tool cavity
Precisely measured resin is rapidly injected into the gap above the preform
The press closes completely, compacting and impregnating the preform to its final dimensions.

Features

Process performance :

Repeatability
On-line control
Flexible: supports multiple manufacturing processes
Fully automated process
Net shape
Compatible with thermoplastic and thermosetting resins
30 pieces/h
Two-minute cycle time for large parts
Use of 100% of raw materials
Compatible with high-pressure (HP) injection

Product performance :

Fiber volume: up to 60%.
Porosity < 2%
No fiber deformation during the process
Ensures stable part geometry

CAPEX / Production volume, part size curve

	C-RTM	HP-RTM
Average cycle time	2 minutes	4 to 10 minutes
Fixed cycle time
Net shape
100% use of raw materials		Carrot
Compatible with thermoplastic resin	Under certain conditions	Under certain conditions
Thermoset resin compatible
High-pressure(HP) injection compatible

Technical specifications (can be activated open by default: content setting --> active as default)

Eco Compact Sustainable Press (ECS PRESS)

Press tonnage: 1,500 tonnes
Opening and closing speed: 800 mm/s
Platens size: 2 m x 1.5 m with parallelism control

RTM equipment and tools

Innovative modular tool (net-shape, thermally optimized)
Optimized temperature control system
High-pressure injection molding machines for thermoplastic and thermoset resins (30-250 cm3/min)

Automation