Advantages of IR welding · contactless (no adhesion)
· well controllable
· high melting depth can be achieved
· may be integrated in existing hot plate and vibration machines
· the use of masks gives a good focus on the welding joint
· 3D contours can be realised in the medium- and short-wave range, but not any contour can be realised
· all thermoplastics can be melted; depending on the radiator type the pigmentation has an influence on the melting characteristics

For welding by means of infrared technology short-wave (0,78-2 μm) as well as medium-wave (2-4 μm) infrared radiation of the spectrum can be used. This depends particularly on the absorption capacity of radiation of the respective plastic material.

The more precisely the radiator is adapted to the absorption capacity of the plastic material, the higher is the degree of efficiency, that means the conversion into warmth. Short waves are absorbed in deeper layers of the material, whereas medium waves heat it up more at the surface. The nearer the radiation source is positioned at the spot to be heated up and the better the ray is focussed, the faster the material will be heated up.

On request, all standard machines of the Toolmaster series can be retrofitted with infrared technology.

· High acceleration of the slide for the parts fixture and optionally also for the hot plate
  slide
· Precise speed regulation, depending on the travel
· Regulated braking of all travel motions
· Precise speed regulation, depending on the travel, in various steps of the melting and
  welding powers. The required parameters can be set at the TP.
· Exchangeable hot plates (standard size 350 x 200 mm) or exchangeable hot plate
  caps which are heated directly
· PLC control Siemens S7 with Siemens TP

Short-wave and medium-wave IR elements can be formed in 3D.

KLN offers the possibility to integrate infrared technology in all machines or tools to minimise abrasion during the solid matter friction phase, by pre-heating with short or medium waves.

· Vibration tool with infrared metal foil radiator in LVW2032.
· Radiator unit with two each metal radiators (individual control) approx. 300 mm
· Quick change over time < 3 sec. in order to avoid cooling of the welding joint

· short-wave radiation (2200 °C at the metal filament)
· 3D contours can be realised, but the production is expensive (graphite mould)
· high energy efficiency as surface transmitter
· also narrow areas can be focussed with respective masks (expensive in 3D contours)
· quick reaction time (1-2 s), thus control is possible in the heating-up phase
· for pre-heating in vibration welding (reduction of lint formation)
· for melting of the welding surfaces (analogous to hot plate welding)
· performance curve is adapted to each material

· short- and medium-wave radiators (900-2400 °C at the metal filament)
· suitable for large surfaces
· by special masks it can be adapted to the respective welding contour
· high energy consumption
· only flat parts can be welded
· can be used as standard radiator
· for pre-heating in vibration welding (reduction of lint formation)
· for melting of the welding surfaces (analogous to hot plate welding)
· surface transmitter can be used for all parts together

· medium-wave radiator (approx. 800°C at the metal filament) ceramic welding nest
  needed
· 3D contours can be illustrated (ceramic nest)
· cheap radiator due to in-house production short heating-up time
· required distance to the welding surface: approx. 3mm
    → exact contour needed
· for pre-heating in vibration welding (reduction of lint formation)
· for melting of the welding surfaces (analogous to hot plate welding)
· energy introduction independent from color or pigmentation of the material