Abstract: An infrared welding device comprising a machine base (1) having at least two workpiece supports (2) for two workpieces, the distance of which is variable, as well as at least one infrared radiator (3) fixed at a movable tool holder (4) of the machine base (1) and introducible into the gap of the workpieces formed by the distance of the workpiece supports (2). The distance of the workpiece supports (2) from each other and the relative assignment of the tool holder (4) are adjustable by a program control, wherein the workpiece supports (2) and the tool holder (4) may be assembled to form a welding module (7) transportable as closed unit (7) and may be connected with the machine base (1) by means of quick-action couplings (6).

Abstract: An infrared welding device comprising a machine base (1) having at least two workpiece supports (2) for two workpieces, the distance of which is variable, as well as at least one infrared radiator (3) fixed at a movable tool holder (4) of the machine base (1) and introducible into the gap of the workpieces formed by the distance of the workpiece supports (2). The distance of the workpiece supports (2) from each other and the relative assignment of the tool holder (4) are adjustable by a program control, wherein the workpiece supports (2) and the tool holder (4) may be assembled to form a welding module (7) transportable as closed unit (7) and may be connected with the machine base (1) by means of quick-action couplings (6).

Abstract: A method for the heating and joining together, preferably for welding, of workpieces by use of a generator. Where, during a heating interval the generator supplies high-frequency energy to at least two electrodes disposed on the workpiece and where the energy supply is controlled by a predetermined time-related curve, with respect to a target value. Accordingly, the energy supply is controlled with reference to the target value by monitoring a first parameter, e.g., high-frequency voltage, high-frequency current or generator anode current. Also, during the heating interval at least one further parameter is monitored, and in the event of an inadmissible divergence in the control system of the first parameter, a subsequent control of the energy supply is carried out.