CNC 4-head welding machine

Extremely fast CNC 4-head 7-axis welding machine that ensures the windows manufacturer with constant operating quality over time and an increase in production of up to 50%.

Designed for horizontal and simultaneous welding of the 4 corners of a Pvc frame, it automatically performs all the necessary operations, positioning at the welding positions, cyclical fusion, compression and cooling and, at the end of the process, it releases the frame on conveyor belts towards the cleaning area.

5 Reasons to choose the SL4-FS

High speed welding cycle: Production increase up to 50% thanks to the controlled axes.

Automatic change system of welding beam (0.2÷2 mm).

Quick change system of the countershims.

Parallel welding with correction of deviations on all 4 corners.

Electronic temperature control combined with the profile code.


  • Length (A)

    5.250 mm
  • Width (B)

    2.200 mm
  • Height (C)

    1.650 mm
  • Weight

    2.300 Kg


  • Installed power

    12 Kw
  • Supply

    400 V
  • Air consumption per cycle

    140 Nl/min
  • Minimum Operating Pressure

    7 bar
  • Operators



  • Machined frames/8h*

    Up to 480

* Dependent on the types of profiles and gaskets to be processed.

Weldable Profile Dimensions

  • Height

    40 ÷ 180 mm
  • Width

    40 ÷ 130 mm

Weldable Frame Dimensions

  • Maximum

    3.200 x 2.800 mm
  • Minimum

    370 x 400 mm


4 Heads Quad


  • Horizontal and contemporary welding of the 4 corners.
  • C-welding.

Upon request the machine can be equipped with:

  • Welding on 3 sides.
  • Welding on 3 sides with supports for threshold assembly.
  • Cooling table.
  • Energy Saver option.
  • Axis brushless motors.
  • Heated blades.
  • Possibility of connection in line with Graf Synergy corner cleaning machines.