Abstract: The invention relates to a wheel, especially a light-metal wheel for motor vehicles, consisting of a star of spokes (12) and a wheel rim (10) provided with an inner base (16) and an outer base (14) that respectively merge into an inner rim end (20) on the inner side of the wheel and into an outer rim end (18) on the outer side of the wheel. A hollow chamber (26, 27, 29) extending at least partially continuously in the peripheral direction is formed in the region of the inner side of the wheel and/or the outer side of the wheel, and can be defined by a profiled wall (28) in the region of the inner base (16) of the rim or the outer base (14) of the rim. In order to create an especially cost-effective structure that can be subjected to mechanical stresses, the profiled wall (28) is embodied as a single component.

Abstract: A wheel, particularly a light metal wheel, for motor vehicles, essentially consists of a spoke wheel center (20) and a rim (10). In order to reduce weight and increase the bending strength, which is of great significance in regard to contact with curbstones and potholes, profile segment (31) in the form of half-shell units, which forms a continuous hollow chamber (41) in the direction of the circumference, at least in sections, are provided in the area of an external base of the rim (14).

Abstract: A temperature control unit for dies and molds, particularly for pressure die-casting or injection-molding of aluminum and alloys thereof, plastic materials and the like, comprising a die or mold cooling circuit through which pressurized water flows. A water feed pump is connected to the circuit and is adjustable to a pressure which is higher than the evaporation pressure of water at a preheating temperature of the water, which can be detected by a first sensor for detecting the temperature of the water. The circuit includes a circulation pump, a water overflow valve which can be set to a lower pressure than the feed pump, and a heating unit which is controlled by the first temperature sensor. A die or mold temperature sensor is further provided which controls the feed pump.