From compression molding to RTM and HP-RTM, modern presses must deliver precise force control, platen parallelism, integrated heating and cooling, and seamless automation integration.
March 4, 2026
Power, precision, and selecting the right system
Selecting the right press technology is a foundational decision in composite manufacturing. Whether producing structural automotive components or industrial panels, press performance directly impacts part quality, throughput, and process stability.
The importance of having the right press
Compression molding presses are widely used for both thermoset and thermoplastic
composites, offering high force, precise platen parallelism, and controlled heating. For RTM and HP-RTM, presses must integrate seamlessly with mold clamping, resin injection, and automation systems to ensure repeatable fiber wet-out (the process by which a liquid resin fully penetrates, surrounds, and adheres to the fibers of a composite material) and dimensional accuracy. The press is not just a clamping device: it is an active process-control tool that determines whether fibers are fully impregnated or left partially dry, directly influencing the final part’s quality.
What to consider
When evaluating press technology for composite manufacturing, performance must be assessed at the system level, not in isolation.
The most effective solutions align press design with resin handling, tooling, and automation.
Force, performance and parallelism matching the part and process
Clamping force needs to account for part geometry, injection pressure, and fiber compaction,
particularly in HP-RTM and structural compression molding. Rigid press frames, precise platen parallelism, and controlled deflection are essential to maintain cavity thickness and consistent fiber wet-out. To ensure the desired production capacity, hydraulic units for mass production must keep in mind the importance of cycle time and takt time for maximum repeatability.
Factory layout, installation and ergonomic constraints
Floor space, pit depth, and foundation requirements should be considered early. Compact layouts and well-engineered installation concepts help optimize space while supporting high-tonnage, high-precision operation. In cases with restricted space in the foundation pit, piping can be built inside the machine instead of running outside. Shuttle, tilting tables to enhance ergonomics for mold changes and for manual operations.
Integrated heating and cooling
Thermal control directly affects resin viscosity, flow, and cure. Presses should support integrated, uniform heating and cooling to enable stable processing windows, reduced cycle times, and repeatable part quality for both thermoset and thermoplastic applications.
Future-forward thinking with scalability and production readiness
Modern presses are process-control platforms, synchronizing motion, force, and pressure with resin injection and curing. High-resolution controls and data acquisition enable repeatability, traceability, and seamless integration with dosing, mixing, and automation systems, a core requirement for high-volume and structural applications.
Precision control and process integration
Press systems should be designed for future expansion, whether through higher automation, faster cycles, or new processes such as hybrid molding or insert integration. Modular architectures support evolving material systems and production demands.
Ultimately, the right press is not defined by tonnage alone, but by how well it integrates into the complete composite process. This is where Cannon stands out: all composite processing equipment we offer is tailored 100% to your project and followed by a dedicated project manager who will work with your team from concept planning through integration, and beyond.
Are you looking for a tailored solution?
Contact us today to discuss your specific needs and find out how our custom solutions can enhance your production process. Don’t wait — let’s create excellence together!
