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bielomatik GmbH
Machines for laser welding of plastics

Machines for laser welding of plastics

Product catalog summary

Introduction to Laser Welding of Plastics
Laser welding is a precise and efficient method for joining plastic components, suitable for both small and large production runs. It allows for abrasion and shock-free welding of various plastic parts, from micro-components to mass-produced items.

Principle of Laser Transmission Welding
This process relies on the different absorption characteristics of the parts to be welded. Thermoplastics are generally transparent to diode lasers (λ ≈ 980 nm) and can be colored as needed. The process involves directing a focused laser beam onto the joining plane, melting the parts through high energy density.

Welding Process Flow

The laser beam penetrates the transparent joint part and is converted into heat by the absorbing part.
The joint zone of the absorbing part is plasticized.
Heat conduction also plasticizes the transparent part, creating a weld under pressure.

Quasi-simultaneous laser welding uses scanner mirrors to traverse the welding contour rapidly, allowing for simultaneous heating and plasticization.

Applications
Laser transmission welding is ideal for:

Small, sensitive parts requiring shock-free welding.
Components with fine channel structures.
Products with transparent and absorbing parts.
Low viscosity materials needing high processing temperatures.
Complex welding geometries.

Technology Specialties
Bielomatik offers advanced machine concepts for large series production, featuring:

Fibre-coupled diode lasers and diode-pumped fiber lasers.
Process control systems for path/time determination and clamping force monitoring.
Interfaces for process output and quality assurance.

Benefits

Safe process control and leak-proof joints.
Abrasion-free and shock-free welding.
High weld strengths and short cycle times.
Design flexibility and optically perfect weld seams.

Machine Modules and Systems
Bielomatik provides various laser welding modules and systems, including:

Standard and compact modules for different operational needs.
Integration modules for production lines.
Customer-specific systems for automated solutions.

Conclusion
Bielomatik offers comprehensive solutions for plastic welding, ensuring efficient and safe production with over 55 years of experience in the field. For more information, contact Bielomatik or visit their website.

Catalog excerpts

Machines for laser welding of plastics-1

Laser Welding laser welding

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Machines for laser welding of plastics-2

Laser Welding Weld – basic geometries: Tongue / groove bond with one-sided overlap (for welding with path control). Tongue / groove bond e.g. for welding on nal dimensions of the part. Pipe / socket bond (without path control). The procedure Laser transmission welding is an established procedure for the large production run. With this procedure it is possible to weld plastic parts abrasion and shockfree. Generally, small and big, soft and exible joining parts can be processed, from micro-parts used in high-tech applications to mass products. The different absorption characteristics of the parts...

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Machines for laser welding of plastics-3

Specialities of our technology for laser welding For parts, which are welded using quasi-simultaneous laser welding in large series, bielomatik offers a new machine concept that yields very short cycle time. Laser sources • Fibre-coupled diode laser • Diode pumped ber laser The type of laser source depends upon the requirements of the components and the customer-specic application. Process control systems: • Path/time determination • Online monitoring and control of clamping force during the welding process • Pyrometry • Fully automatic performance measurement • CCD camera control systems Process...

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Machines for laser welding of plastics-4

Laser Welding Machine versions Standard Module Laser K 3633 – 1700 x 1200 Pass-through operation Compact Module Laser K 3632 – 1200 x 800 Basic Turntable Pass-through operation With bre coupled diode laser or bre laser Integration Module Laser Standard K 3643 • For installation in production lines • For automated complete solutions • With bre coupled diode laser or diode pumped ber laser Integration Module Laser Compact K 3642 • For installation in production lines • For automated complete solutions • With bre coupled diode laser or diode pumped ber laser Fully automatic Pass-through operation/turntable...

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Machines for laser welding of plastics

Machines for laser welding of plastics

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