Compression Molding of Composites

Compression molding is a widely employed technique in composite manufacturing, involving the use of heat and pressure to shape composite materials. In this process, a pre-measured amount of composite material, often in the form of sheets or pellets, is placed into a mold cavity. The mold is then closed and subjected to high pressure and temperature, allowing the material to conform to the shape of the mold. As the material compresses and solidifies, it forms the desired product. Compression molding is favored for its ability to produce complex shapes with high fiber volume fractions, ensuring strong and consistent composite parts.

Sentherm conductive polymers match aluminum thermal performance, cut weight
Injection/Overmolding

Sentherm conductive polymers match aluminum thermal performance, cut weight

Tailored filler networks, anisotropic material design and manufacturing process control achieve hybrid  polymers for EVs, batteries and other automotive-related electronics with 95% of aluminum’s thermal performance and 25-45% reduced component weight.

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Industrial CNC Routers
ELFOAM rigid foam products

Latest Compression Molding Articles

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JEC

IPCO end-to-end turnkey systems ensure efficient composite materials handling

JEC World 2026: Advanced double belt presses, scattering systems, film casting tech and web converting solutions for automotive, aerospace and energy sectors are highlighted by IPCO.

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Automation

Wickert thermoforming press for aircraft structural components increases output up to 80%

JEC World 2026: Attendees can learn more about Wickert’s semi-automated press concept that is faster, more efficient, flexible and ergonomic than its previous offerings.

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Carbon Fibers

Mejzlik Propellers develops degradation-resistant hub for foldable CFRP propeller

SNAPSHOT: Hub stays stable under long-term crossflow loads, remains predictable in extended forward-flight thanks to CFRP design and manufacturing expertise.

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Work In Progress

Cutting engine weight via thermoplastic composite guide vanes

Greene Tweed replaces metal stator vanes with its DLF material co-molded with a metal leading edge that meets performance, cost and high-rate production targets while cutting 4 kg per engine.  

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ATL/AFP

Thermoplastic composite materials and processing interactions

Selection of product material formats and their interactions with various process methods heavily influence a final TPC part’s properties and fabrication options. 

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One-shot compression molding enables main rotor blades that achieve 20,000 hours between overhauls

Hill Helicopters engineered composite main rotor blades using a novel single-cure manufacturing process for stiffness and mass distribution optimization.

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Greenerd Compression Molding
Toray Advanced Composites hi-temperature materials
Turn-Key Pultrusion Systems
Hydraulic & Pneumatic Presses
precision-engineered heating solutions

Latest Compression Molding News And Updates

KraussMaffei presents automotive-focused BrightStar electric press

Fully electric press offers precise temperature control and fast mold change for press lamination, edge folding applications and even ultrasonic welding of TPC.

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Carbon Fibers

LIFT to lead new "Critical Materials Processing" program on ceramics, CMC

Multifaceted project aims to accelerate development and scale-up of ultra-high temperature material technologies including ceramic matrix composites (CMC) and carbon fiber as a precursor in CMC preforms.

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SABIC composite hybrid battery cover enhances EV safety, efficiency

SABIC collaborated with Engel, Siebenwurst, Forward Engineering, Ensinger and Envalior to develop a thermoplastic composite EV battery cover, combining strong structural performance, flame retardancy and design efficiency.

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Wabash introduces larger custom presses up to 2,500 tons

Larger presses with platen sizes up to 10 × 10 feet and 1800°F operating temps service increasing component size, complexity and material diversity in composites manufacturing.

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Trends

Greene Tweed to deliver advanced TPC components for jet engines

More than 50 custom-designed parts made from Greene Tweed’s Xycomp DLF thermoplastic composite material will be delivered over the course of this 10-year strategic agreement.

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Defense

CRG Defense secures $2 million contract to build hybrid military vehicle electric motors/generators

The effort also supports a broader initiative to accelerate hybrid-electric propulsion technologies to ground and air platforms, leveraging FRP structures and composite-based magnetic retention systems.

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precision-engineered heating solutions
JEC World 2026
Airtech
Composites One - distributor
AFP, Slitting, Filament Winding, Automation

Featured Posts

Improving hail impact resistance of discontinuous thermoplastic composite parts

Greene Tweed examines failure behavior, identifying key factors for improvement and demonstrating sufficient design for complex-shaped aeroengine components.

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RTM

CFRP boosts power, drops weight for next-gen fire truck pumps

Carbon fiber enables KASE Pumping Systems to eliminate corrosion and increase durability, including a high-capacity 6,500-gpm, ultra-compact 200-pound pump that aids emergency services.  

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Post Cure: NFPA-rated carbon fiber composite fire truck pump for firefighting, energy industries

Direct engine-driven systems or firetruck applications benefit from the lightweight, compact, high-volume centrifugal pump by KASE Pumping Systems.

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Thermoplastics

Troubleshooting thermoplastic composite stamp forming

Understand the basic science of TPC stamp forming, a manufacturing process steadily gaining momentum in aerospace and mobility applications thanks to its rapid forming, short cycle times and automated methods.

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Carbon Fibers

Prepreg compression molding supports higher-rate propeller manufacturing

To meet increasing UAV market demands, Mejzlik Propellers has added a higher-rate compression molding line to its custom CFRP propeller capabilities.  

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Focus on Design

Composite bipolar plates provide 81% improvement to hydrogen fuel cell power density

Ultra-thin CFRTP plates developed by Hycco achieve a 7.5 kilowatt/kilogram power density, high durability for fuel cells in long-flight drone and heavy-mobility applications.

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Alpha Technologies' ESR polymer testing instrument
composite cutting machines and systems
ACMA's Thermoplastic Composites Conference
Thermwood LSAM Elevate Precision Beyond Scale
CAMX 2026