Abstract: A method for forming a hydrophilic surface on a graphite-containing material. The surface to be rendered hydrophilic is irradiated with a pulsed laser having a power density of at least 0.5 MW/mm2. A bipolar plate, for example, may be rendered hydrophilic in part-regions of its surface in a simple manner and with a low outlay in terms of apparatus.

Abstract: A process for producing a molded part from a highly filled thermosetting starting material including: introducing the starting material into a prepressing tool; producing a preform from the starting material, the starting material being brought to a prepressing temperature by the prepressing tool and being compressed with a prepressing force to form the preform; removing the preform from the prepressing tool and introducing the preform into a finish pressing tool; and producing a finished part from the preform, the preform being brought to a finish pressing temperature by the finish pressing tool and being compressed with a finish pressing force to form the finished part. Here, the prepressing temperature is lower than the finish pressing temperature and the finish pressing temperature is at least as high as an onset temperature of a curing reaction of the starting material.

Abstract: The invention relates to a device (10) for producing a compression moulded body (11), having at least one first moulded layer, wherein the device has an upper ram arrangement (12) and a lower ram arrangement (13), with in each case at least one ram unit (15, 16), and a mould (14), wherein the ram unit has at least one ram tool (17), wherein the ram tools are configured such that they can be displaced axially with respect to one another in a die (19) of the mould, in such a way that moulding segments can be configured in the mould by means of the ram tools, wherein the device has a filling device (27), wherein the die can be filled with moulding material by means of the filling device, wherein the upper ram arrangement and the lower ram arrangement in each case have a multiplicity of circularly annually arranged ram units, wherein the mould is configured as a die plate (18) and, together with the ram units, configured as a rotor which is configured such that it can be rotated about an axis, wherein the device

Abstract: The invention relates to a method for producing a latent heat accumulator of expanded graphite by expanding a graphitic starting material. The invention is characterized in that the graphitic starting material is introduced into a mold which corresponds at least in sections to the negative mold of the latent heat accumulator, and that the graphitic starting material is subsequently expanded in the closed mold.

Abstract: The invention relates to a method for producing a rotor unit (10) of an electric motor, in particular a canned motor or the like, for driving a pump wheel of a pump and to a pump, the rotor unit being composed of a rotor (11), a shaft (12), a thrust washer (13) and sliding bearings (14, 15), the rotor being formed by a permanent magnet (22) or a shading coil, the rotor and the thrust washer being attached to the shaft, the shaft being rotatably mounted at one end (16) of the shaft and at the thrust washer by means of respective sliding bearings, the thrust washer being in contact with an axial lateral surface (21) of one of the sliding bearings (14), wherein the shaft is made from a fiber-reinforced polymer material.

Abstract: The invention relates to a method for producing a latent heat accumulator of expanded graphite by expanding a graphitic starting material. The invention is characterized in that the graphitic starting material is introduced into a mold which corresponds at least in sections to the negative mold of the latent heat accumulator, and that the graphitic starting material is subsequently expanded in the closed mold.

Abstract: There is provided a method of manufacturing a combustible heat source having a barrier, the method including providing a mold defining a cavity; placing a particulate component in the mold cavity; placing a laminar component, adjacent the mold, to cover the cavity opening; and compressing the particulate component to form the combustible heat source, wherein, during the compression step, the barrier is formed by punching the laminar component using a punch and the mold, the punch acting on the barrier to compress the particulate component and affix the barrier to the combustible heat source.

Abstract: There is provided a method of manufacturing a combustible heat source having a barrier, the method including providing a mould defining a cavity; placing a particulate component in the mould cavity; placing a laminar component, adjacent the mould, to cover the cavity opening; and compressing the particulate component to form the combustible heat source, wherein, during the compression step, the barrier is formed by punching the laminar component using a punch and the mould, the punch acting on the barrier to compress the particulate component and affix the barrier to the combustible heat source.