Abstract: The invention relates to a device and a method for controlling the feed of polymer melt, which has been discharged from an extruder, to a plastics processing machine formed from at least two subunits (1, 2), to which the polymer melt discharged from the extruder is fed via a distributor (13) which is positioned downstream of the extruder and which serves for splitting up the polymer melt into partial streams corresponding to the number of subunits. According to the invention, the partial streams are each fed to a subunit by means of a gearwheel pump (11, 12). The volume flows fed to the subunits (1, 2), which are of substantially identical design, can be respectively separately controlled in open-loop or closed-loop fashion through control of the drive rotational speed of the respective gearwheel pump (11, 12) in a manner dependent on operating parameters and/or the configuration of the respective subunit (1, 2).

Abstract: The invention relates to a device for impregnating fiber bundles with a polymer melt, in which device fiber bundles, which are inserted in parallel with one another into a slot-like infeed of an impregnation unit (4), are guided through between two guide plates (16, 17), which have undulating surfaces and are arranged so as to be complementary to one another at a defined spacing, and are discharged from the impregnation unit (4) via an outlet (28), the fiber bundles being saturated with the polymer melt while passing through the impregnation unit (4), which polymer melt following the slot-like infeed is introduced between the guide plates (16, 17) into the passage (29). According to the invention, the impregnation unit (4) comprises at least two passages (29) for a defined number of fiber bundles in each case, the passages (29) each comprising an inlet (26) for polymer melt.

Abstract: A method of gluing a metal part to another part for use in a personal care device such as an electric toothbrush. The method includes steps of providing a metal, such as steel, part, and another, metal, part; treating a surface portion of the metal part with ultra-fast laser pulses having a pulse length in the femtosecond range, e.g., from about 1 femtosecond to about 990 femtoseconds, so that a surface layer of the metal surface is removed; applying an adhesive to the treated surface of the metal part or to a surface of the other part; and gluing the metal part and the other part together.

Abstract: The invention relates to a device for impregnating fiber bundles with a polymer melt, in which device fiber bundles, which are inserted in parallel with one another into a slot-like infeed of an impregnation unit (4), are guided through between two guide plates (16, 17), which have undulating surfaces and are arranged so as to be complementary to one another at a defined spacing, and are discharged from the impregnation unit (4) via an outlet (28), the fiber bundles being saturated with the polymer melt while passing through the impregnation unit (4), which polymer melt following the slot-like infeed is introduced between the guide plates (16, 17) into the passage (29). According to the invention, the impregnation unit (4) comprises at least two passages (29) for a defined number of fiber bundles in each case, the passages (29) each comprising an inlet (26) for polymer melt.

Abstract: A drive system includes a power converter and a motor powered from the power converter via supply leads. An electromagnetically actuatable brake is disposed on the motor. The brake is able to be supplied and is therefore controllable from an AC/DC converter, which is powered via lines from a DC/AC converter that is powered and/or controlled by signal electronics of the power converter.

Abstract: A method for closing a fillable collecting tank, in particular a fillable collecting tank of a heat exchanger for storing a fluid, having walls forming the collecting tank, wherein one of the walls is formed as a baseplate having openings for receiving pipes, wherein a filling opening for adding the fluid is provided in one of the walls, wherein the filling opening can be closed by the provision of a closure element that can be inserted into the filling opening or can be placed onto the filling opening after the fluid has been added to the collecting tank. A heat exchanger is also provided.

Abstract: A drive system includes a power converter and a motor powered from the power converter via supply leads. An electromagnetically actuatable brake is disposed on the motor. The brake is able to be supplied and is therefore controllable from an AC/DC converter, which is powered via lines from a DC/AC converter that is powered and/or controlled by signal electronics of the power converter.

Abstract: A method for closing a fillable collecting tank, in particular a fillable collecting tank of a heat exchanger for storing a fluid, having walls forming the collecting tank, wherein one of the walls is formed as a baseplate having openings for receiving pipes, wherein a filling opening for adding the fluid is provided in one of the walls, wherein the filling opening can be closed by the provision of a closure element that can be inserted into the filling opening or can be placed onto the filling opening after the fluid has been added to the collecting tank. A heat exchanger is also provided.

Abstract: A network apparatus includes an independent power supply providing a first power signal, and a data distribution device which is operably coupled to the independent power supply and a remote data distribution device, where the remote distribution data device exchanges data and provides a second power signal to the data distribution device, and further where the data distribution device selects the first power signal or the second power signal for operational power. A method includes scanning a plurality of sensors, each coupled to a plurality of power inputs, to ascertain if a power signal is present, determining whether a power signal associated with an independent power supply is present at a power input, sourcing power from the independent power supply if the power signal is associated with an independent power supply, and sourcing power from an alternative supply if the power signal is not associated with an independent power supply.

Abstract: The invention relates to a surface of an object, especially a heat exchanger, e.g. a lateral part, a wavy rib, or a tube of a heat exchanger, which is to be soldered by means of a flux layer (2). In order to improve the properties of the surface that is to be soldered, said surface is provided with at least one more layer (3; 13, 16) in addition to the flux layer (2). The at least one more layer (3; 13; 16) contains an additive which modifies the surface to be soldered, said additive being reacted in order to modify the surface when the surface that is to be soldered is soldered.

Abstract: A network apparatus includes an independent power supply providing a first power signal, and a data distribution device which is operably coupled to the independent power supply and a remote data distribution device, where the remote distribution data device exchanges data and provides a second power signal to the data distribution device, and further where the data distribution device selects the first power signal or the second power signal for operational power. A method includes scanning a plurality of sensors, each coupled to a plurality of power inputs, to ascertain if a power signal is present, determining whether a power signal associated with an independent power supply is present at a power input, sourcing power from the independent power supply if the power signal is associated with an independent power supply, and sourcing power from an alternative supply if the power signal is not associated with an independent power supply.

Abstract: The invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, having at least one surface which is impinged on by a medium, in particular exhaust gas, is made from metal, in particular aluminum or stainless steel, and is provided with a coating. In order to improve the properties of the coating, according to the invention, the coating comprises a coating material based on nanotechnology.

Abstract: The invention relates to a brushless, electronically commuted motor, more particularly one used as drive motor for a ventilator drive mechanism in an automobile, comprising a permanent magnetic outer rotor (5), in which a stator (7) with three winding wires staggered at 120° el is mounted, in addition to several winding coils for each winding wire. The pitch of the coil of the winding coils (15-37) is s smaller than the pitch of the pole and 0.5 coils are wound per pole and wire (9, 11, 13). A flat, compact, light-weight, silent and efficient EC motor (1) is obtained due to the fact that each winding wire consists of several parallel-connected windings, the outer rotor (5) has at least p=3 pole pairs and a control plate with conductor rails is provided to connect the individual winding coils.