Industrial presses are essential for forming advanced materials like polyurethanes and composite resins into high-performance components. This article explores the key press technologies—hydraulic, compression, vacuum-assisted, and continuous lamination—and how they support precision molding, efficient production, and high material quality across industries like automotive, aerospace, and construction.
August 12, 2025
Industrial presses play a critical role in shaping materials like polyurethanes and composite resins into usable parts for many industries. These materials, known for their strength, versatility, and durability, require precise pressure and temperature control during processing — making the right choice of press essential for quality and efficiency.
We are one of the world’s leading manufacturers for industrial presses, with solutions that can exceed 10,000 tons. Our presses allow you to effectively process composite materials, mold complex components, compress powders and work with thermoplastics. Let’s take a look at some of them in more detail.
Understanding the materials
Polyurethanes are polymers used in applications like flexible and rigid foams, coatings, and much more. Processing them involves chemical reactions between polyol and isocyanate, each requiring specific conditions for pressure and temperature to control curing time and part quality. The press must guarantee even force distribution and precise thermal regulation.
Composite resins consist of a matrix (a polymer), usually reinforced with glass or carbon fibers. Thermoset composites and thermoplastics are both common and can be molded into complex shapes with high strength-to-weight ratios. Processing them often demands vacuum systems, heating and cooling systems, and tight geometric tolerances — factors heavily influenced by press design.
Main types of industrial presses
Hydraulic presses
Hydraulic presses are among the most common for processing polyurethanes and composites, using hydraulic fluid to exert force, allowing for high-pressure molding of components, including large or thick ones. They are commonly used for laminating multi-layer composite panels or forming structural composite parts. Our presses cover forces from 500 kN up to 50,000 kN.
Hydraulic press advantages
- High force capacity
- Versatile die and mold compatibility
- Excellent for both batch and continuous operations
Compression molding presses
Compression molding presses are a specialized type of hydraulic press (vertical down-stroke or short-stroke), widely used in creating composite parts. The material is pre-impregnated, either preheated or preformed then placed in a heated mold and, as the name suggests, compressed into the desired shape with forces up to 50,000 kN. They are ideal for producing automotive body panels, aerospace components, and industrial components.
Compression molding press advantages
- Precise mold shaping
- Active parallelism control between platens
- Controlled heating and cooling cycles
- Ideal for medium to high-volume production
Vacuum-assisted presses
Vacuum-assisted presses take advantage of a vacuum to remove air from the mold cavity before pressure is applied. The vacuum system can be applied to any press. This is critical for composite parts that require a high-quality surface finish and minimal voids: aerospace-grade parts, medical-grade PUR components and thin, high-fiber-volume laminate structures.
Vacuum-assisted press advantages
- Improved resin flow and surface quality
- Reduced porosity
- Enhanced fiber-resin interface
Special presses or Vertical down-stroke press
Reaction injection molding (RIM) involves pushing preheated resin into a closed mold cavity and is done using a traditional vertical down-stroke press or a specialized press with forces ranging from 500 kN to 5000 kN. This method is suitable for parts with intricate shapes and embedded components, providing a high degree of flexibility and producing parts with excellent strength-to-weight ratios.
Transfer molding press advantages
- Less material waste
- Complex shapes possible
- Efficient mold filling
Continuous lamination presses
Continuous lamination presses, or double belts, are used for flat products like PUR-based or fiber-reinforced panels. These presses operate in a continuous line where raw materials are pressed, heated, and cured in sequence, for example, when producing sandwich insulation panels, phenolic boards or polyiso boards.
Continuous lamination press advantages
- High production rates
- Consistent quality
- Less material waste & ability to recycle polyurethane
Selecting the best press for your application
When selecting a press for polyurethane or composite resin processing, several factors come into play, process control being important to each in maintaining a consistent output:
- Material type: Thermosets often require slower, heated cycles while thermoplastics may need faster cycles with higher cooling rates
- Part geometry and tolerances: Complex shapes benefit from vacuum presses
Emerging trends with industrial presses
In line with Industry 4.0 and 5.0, modern press systems are increasingly equipped with advanced controls, sensors, and IoT connectivity that allow for real-time monitoring of pressure, temperature, and cycle times. Energy efficiency is a design priority, while in the composite sector, innovations in programmable curing, in-mold sensors, and digital twins are helping manufacturers produce lighter, stronger, and more complex components.
As material technologies evolve, so too will the presses designed to process them — offering improved efficiency, automation, and product performance.
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!
