Forsstrom Hot-Wedge Welding Machine

Hot-Wedge Welding Technology for Industrial Thermoplastics

Manufacturers working with thermoplastics such as PVC, TPU, PU, and PE need reliable and efficient joining methods. Hot-wedge welding technology provides precise, repeatable seams for industrial production while minimizing energy use, noise, and operational costs. Forsstrom develops industrial hot-wedge welding machines for global manufacturers who require high-speed production, consistent seam quality, and efficient processes.

Hot-wedge welding is ideal for applications ranging from tarpaulins and tents to inflatable structures, truck covers, signage, and technical textiles. Our machines handle everything from thin films to multilayer reinforced foils, ensuring long-term performance and repeatable results.

What Is Hot-Wedge Welding?

Hot-wedge welding is a thermal joining process in which a heated wedge fuses overlapping thermoplastic materials under controlled pressure. Unlike hot-air welding, heat is applied directly through the wedge, providing:

  • Stable and repeatable seam quality

  • Reduced energy consumption

  • Minimal compressed air usage

  • Lower noise and cleaner working conditions

For many applications, hot-wedge welding offers an efficient alternative to high-frequency welding. In some production setups, the two technologies complement each other — high-frequency welding handles complex shapes and details, while hot-wedge welding produces long, straight seams or joins high-volume panels.

Choosing the right welding method depends on material type, seam design, and production flow.

Why Choose a Forsstrom Hot-Wedge Welding Machine?

Precision Seam Control

Servo-driven foil fusion and digital roller pressure regulation ensure uniform weld strength across long production runs. Every seam is consistent, whether short or extended.

High Production Speed

With welding speeds up to 30 m/min, Forsstrom hot-wedge machines support high-volume industrial manufacturing without compromising quality.

Energy Efficiency

Compared to conventional hot-air systems, energy use can be reduced by up to 92%, and compressed air consumption by up to 99.5%, significantly lowering total cost of ownership.

Intelligent Automation

Route Mode automatically adjusts speed and drive when welding curves or complex geometries, improving repeatability and reducing operator dependency.

Industrial Control System

Built on Siemens components with a 10.1” HMI multi-touch interface, the system allows real-time monitoring and storage of production parameters for repeatable processes.

Stationary vs. Travelling Hot-Wedge Welding Machines

Forsstrom offers two industrial configurations tailored to production needs.

HW-WS – Stationary Hot-Wedge Welding Machine

Designed for fixed production environments, the HW-WS delivers stable and controlled welding conditions, ensuring predictable seam quality across repeated industrial runs.

Typical applications:

  • Awnings and sun protection systems

  • Billboards and signage

  • Sports and leisure products

  • Inflatable structures

  • Tarpaulins and truck covers

  • Tents and lightweight constructions

The HW-WS is ideal for manufacturers with defined workflows and consistent panel sizes.

HW-WT – Travelling Hot-Wedge Welding Machine

The HW-WT features a travelling welding head and extended welding table, making it perfect for large or heavy panels requiring high accuracy.

Typical applications:

  • Large industrial covers

  • Technical textile structures

  • Tents and halls

  • Inflatable products

  • Signage and façade systems

The travelling configuration supports large-scale production while maintaining precise seam control.

Applications of Hot-Wedge Welding

Hot-wedge welding is widely used in the industrial production of:

  • PVC and TPU tarpaulins

  • Truck and trailer covers

  • Tents and membrane structures

  • Inflatable boats and air-supported products

  • Billboards and printed textiles

  • Lightweight architectural fabrics

  • Technical textile enclosures

This method is particularly effective for overlap seams, hems with pockets, reinforced edges, and long straight welds.

Configurable for Industrial Production

Forsstrom hot-wedge welding machines can be customized with:

  • Heating wedges in multiple widths (10–50 mm)

  • Standard or high-speed wedge versions

  • Silicon or stainless-steel rollers

  • Adjustable guiding tools for hems and overlap welding

Silver heating wedges provide extended service life compared to aluminum, supporting continuous production environments.

Hot-Wedge Welding and High-Frequency Welding

Hot-wedge and high-frequency welding serve distinct purposes:

  • Hot-wedge welding: optimal for long seams and high-volume panel joining.

  • High-frequency welding: ideal for detailed geometries, 3D shapes, and airtight seams.

Many production setups use both technologies together to maximize efficiency, seam quality, and manufacturing flexibility. Forsstrom supports manufacturers globally with both solutions and advises on the most effective welding strategy for each application.

Industrial Welding Solutions for Global Manufacturers

Forsstrom hot-wedge welding machines combine precision mechanics, servo technology, and energy efficiency to meet modern industrial demands. Whether you require a stationary system for controlled workflows or a travelling system for large panels, Forsstrom configures a solution tailored to your material type, seam design, and production goals.

Contact Forsstrom today to discuss your application, explore the HW-WS and HW-WT series, and request a customized solution for your production line.