The present invention discloses a heat radiator, especially an infrared radiator, having at least one radiation source by means of which supplied electrical energy is convertible into heat radiation, as well as a control. This control comprises at least one frequency converter having a first, a second and a third output so that between the first and the third output a first alternating current is providable and between the second and the third output a second alternating current is providable by means of which the at least one radiation source is operable.

Devices and methods for producing sandwich composite materials having at least one layer of plastic disposed between at least two outer metallic covering layers may comprise providing at least two semifinished products coated with plastic on one side, activating at least one of the plastic-coated sides of the metallic covering layers directly from the side of the covering layer having the plastic-coating, and connecting the plastic-coated sides of the metallic covering layers to form the sandwich composite material. The activation of the plastic may be performed by way of a heat source that utilizes an activation medium, radiation, or plasma, for example.

In order to provide a method for heating an object (102) that is simple to perform and makes it possible to heat an object (102) efficiently and reliably, it is proposed that the method should include the following: providing an object (102) to be heated; applying at least one energy beam (108, 109) to the object (102) to be heated, wherein at least one energy beam (108) is guided over the object (102) to be heated multiple times, along a predetermined intended heating path (114), and this heats the object (102) along the intended heating path (114); determining a temperature distribution over the intended heating path (114), for identifying one or more deviation points (120) at which an actual local temperature differs from an expected and/or calculated temperature; changing and/or supplementing the application of at least one energy beam (108, 109) in order to compensate for the temperature difference at one or more deviation points (120).

Heating element for generating IR heat beams for contactlessly heating plastic profile ends, preferably for end-face welding of pipes or fittings clamped in a device, comprising a heating plate made at least partially of a conductive material and having two heatable faces, a heating wire for generating the heat beams, wherein the heating wire is arranged on the faces of the heating plate, wherein the heating plate has a plurality of heating zones spaced apart radially from one another.

A rotary hot plate welding system joins portions of two parts made of thermoplastic material by inserting the two parts into a clamping mechanism with the two parts spaced from each other. The clamping mechanism is mounted on a turntable that is rotatable around an axis that is parallel to the direction of movement of the parts when they are moved to clamp them together. By indexing the turntable, the two parts are moved into alignment with at least one stationary heated plate extending between the two parts to be joined, to melt the opposed surfaces of the two parts. The turntable is then indexed to a station where the melted surfaces of the two parts are clamped together to press the melted surfaces into direct contact with each other. The two parts are cooled while they remain clamped together, in direct contact with each other.

Disclosed is a method of forming an article from a unidirectional (UD) tape comprising a continuous unidirectional fiber impregnated with polymer resin. The method includes winding a continuous section of cold UD tape to form a closed loop preform (38) comprising a plurality of stacked layers while discretely welding and consolidating the wound preform by heating and applying pressure.

A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a single sealing zone, and a weakening zone disposed within the single sealing zone. The single sealing zone may be a heated perforator, includes a heating wire. The heating wire may be an NiCr wire stitched into the heater, and be disposed on a cap or on the seal bar. The weakening zone may create a line of weakness that is uniform or varies in intensity. The sealing zone may include temperature zones, cartridge heaters, cooling air, or heated air, or a source of ultrasonic, microwave or radiative energy.

A method for producing a bonded plate-shaped assembly includes retaining a pair of plate-shaped members facing each other by a pair of retaining base members; charging a photo-curable liquid material between the pair of plate-shaped members facing each other; causing movement of the pair of retaining base members by a retaining base member movement unit to cause the pair of plate-shaped members to draw close to each other to cause wetting spreading of the liquid material between the pair of plate-shaped members; detecting a wetting spreading state of the liquid material by a sensor; and illuminating curing light, in response to the result of detection, to the liquid material wettingly spread to the entire surfaces of the pair of plate-shaped members, to form the bonded plate-shaped assembly made up of the pair of plate-shaped members bonded together.

The present invention discloses a heat radiator, especially an infrared radiator, having at least one radiation source by means of which supplied electrical energy is convertible into heat radiation, as well as a control. This control comprises at least one frequency converter having a first, a second and a third output so that between the first and the third output a first alternating current is providable and between the second and the third output a second alternating current is providable by means of which the at least one radiation source is operable.

A method of fusing without contact the ends of thermoplastic filaments grouped together to form at least two tufts. The method steps include providing at least two tufts of thermoplastic filaments arranged at a distance to each other, providing a heating plate at least partly made from a conductive material and structured to have at least two heating sectors separated from one another by at least one separation sector arranged for emitting at least less thermal radiation then the heating sectors, each of the heating sectors having conductive material and a heating surface corresponding in shape and position to the shape and position of the ends of the tufts, exposing the ends of the tufts to the heating plate such that the tuft ends and the heating sectors are aligned with each other, and generating an electric-current flow through the heating sectors so that the heating surfaces of the heating sectors emit thermal radiation that is absorbed by the ends of the filaments, whereby the ends of the filaments melt and the filaments of each tuft are fused together.