RTM Technology (Resin Transfer Moulding)

The RTM process allows high reproducibility and a short cycle time. It is particularly suitable for geometrically complex components with good surface quality on all sides and for large quantities.

The strengths of the RTM process:

• Precisely definable fibre placement
• High fibre content
• High surface quality
• All-round shaping, exact geometry
• High temperature resistance
• Short cycle times

In the RTM process, the dry reinforcement material is placed in the mould. After the mould is closed, the matrix (resin, hardener) is injected or sucked in (impregnation). For complicated components, it makes sense to use pre-moulded reinforcement materials (preforms). Mainly thermoplastically bonded mats, braids and fabrics are used, which are preformed using heat. Depending on the material and product, the mould only takes 15-90 minutes to harden. The component is then demoulded and further processed.

Connova Group has the expertise and resources for the RTM process:

• High-quality, temperature and pressure-resistant moulds (usually made of aluminium or steel)
• Mould carrier or press or clamping system
• Clean and controlled laminating rooms to prevent external contamination
• Precise mixing and dosing system
• separate preform stations

The RTM process is used:

• in aviation: control levers, rudders, panelling parts
• in automotive engineering: tailgates, spoilers, decorative covers
• in mechanical engineering: robot arms, high-speed machine parts, fittings
• in medical technology: prostheses (aids, outside the body)
• in sports equipment: bicycles, paddles