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Laser Welding of Plastics with Modular Machines

ProByLas provides machines for laser plastic welding, which can be configured individually to the parts to weld and customer requirements.

Email Address
Technopark Lucerne Platz 4,
6039 Root,

ProByLas provides machines for laser plastic welding, which can be configured individually to the parts to weld and customer requirements.

For special machine building, machine components are also available.

Besides machines and components, ProByLas supports clients with welding tests on materials and prototypes up to small series in the sales phase, as well as after-sales maintenance and troubleshooting.

Laser plastic welding: precise & concise – clean and green

Welding plastics with lasers allows precise and clean weld seams, which is essential for many medical devices. The required energy to melt plastics is locally introduced and does not cause heat impact on nearby areas such as heat-sensitive reagents.

Basic principle of laser plastic welding: upper part is laser-transparent and lower is laser-absorbent.
Example of laser plastic welding: micro-fluidic channels for a diagnostic device. For prototyping best with contour process in large quantities with mask process.
Example of laser plastic welding: multi-part disposable filter unit. The filter membrane is hermetically locked between the welded plates and joined leak-tight to the housing.
Example of laser plastic welding: welding on the circumference of a connector on tube with radial optics or rotation process. Press fit between tube and connector instead of clamping unit.
Modular Turnkey S – left: with scanner optics, pneumatic clamping and rotary tablet for part-handling; right: with spot-optics including pyrometer, pneumatic clamping, xy-axes and drawer for work-pieces.
Modular Turnkey M: configuration with XYZ-axes for workpieces with welds up to 500mm x 400mm and drawer for part-handling. Peripherals such as a mouse or keyboard can be connected via USB.
Modular Turnkey M: configuration with scanner head for work-pieces with welds up to 350x350mm and 2-position rotary table for handling. Welding space is accessible from wide side doors.
Modula components for special machine building: laser units including system and safety control, different types of optics, clamping units and motion systems.
Modula Assembly Inline for easy integration of laser plastic welding as a process step on a large rotary table or a conveyer belt (required Modula laser unit not shown).

Other important advantages are the absence of vibrations, which may damage electronics, and the greatly reduced risk to create particles in the welding process, especially compared to ultrasonic or vibration welding.

With little energy required for welding and no solvents involved like with adhesives, the technique has reduced environmental impact.

All process types for laser plastic welding

With an extensive range of optics, we can apply and deliver all laser welding techniques to our clients:

  • contour process by spot optics with or without pyrometer for non-contact temperature sensing,
  • quasi-simultaneous process by scanner optics and sensors on clamping unit to measure the collapse during welding,
  • simultaneous process by special optics shaping the laser beam into the contour of the weld seam as eg ring optics, line optics, areal optics or diffractive optics (DOE),
  • circumferential welding by radial optics or by rotating the workpiece below spot optics,
  • ball optics welding with local temporary clamping for foils, technical textiles or thin plates
  • mask welding by line optics passing over a shadow mask above the weld seam area.

Turnkey S modular and compact benchtop machine

Turnkey S is with its flexibility unique in the market of small compact machines. Machine configuration can be chosen according to workpieces to weld, as well as to client requirements.

The machine can be delivered with diverse motion systems and laser powers. If the system comprises servo-axes for contour process a working area of 100x150mm can be served. With optional z-axis also three-dimensional contours can be welded.

In quasi-simultaneous welding with a scanner optics, a welding area of 100×100 mm can be covered.

The clamping unit can be supplied in different heights adapted to the workpieces to weld, as well as optional sensors for process and quality control. For the handing of the workpieces in and out of the machine, a drawer or a rotary indexing table can be selected.

Turnkey M workstation for bigger plastic parts

Turnkey M is based on the same modular design framework as Turnkey S. It is suited for larger workpieces, which cannot fit into a Turnkey S.

Turnkey M, equipped for contour process with servo-axes, can cover welding areas up to 500mm x 400mm. With scanner optics for the quasi-simultaneous process, workpieces up to 350mm x 350mm are available.

Modula components for special machine building

If parts are too large for Turnkey M or the ready-to-use machines cannot fulfil requirements, we provide also all necessary modules for laser plastic welding separately for specific machine building.

In this product range of Modula components, we offer a variety of laser units, optics, clamping units, and motion systems. The control logic processor and user interface are inside the laser unit, so the special machine builder is only required to build the laser safe housing and handling of workpieces in and out of the machine.

Support from lab trials to after-sales

As well as providing machines, we also support our clients along the whole lifecycle of the welding machine and the plastic parts welded on it.

Within our application laboratory, we check weldability of plastic materials and test prototype parts to proof feasibility before investing in a machine.

Furthermore, small series production can be offered if, for example, a larger quantity of parts is necessary for in-depth testing or validation of a medical device.

During after-sales, regular maintenance and troubleshooting, if necessary, aid the client in keeping a favourable uptime. Also upgrading the machines for new or additional workpieces can be provided.

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Technopark Lucerne Platz 4
6039 Root

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