Abstract:
Die Erfindung betrifft eine elektronische Vorrichtung, insbesondere ein Steuergerät für ein Kraftfahrzeug, Elektrofahrzeug oder Hybridfahrzeug. Die Vorrichtung weist ein Gehäuse auf, wobei das Gehäuse einen Hohlraum umschließt. Die Vorrichtung weist auch einen in dem Hohlraum angeordneten Schaltungsträger auf, wobei der Schaltungsträger wenigstens einen Halbleiterbaustein aufweist. Die Vorrichtung weist eine Wärmesenke auf, welche mit dem Halbleiterbaustein wärmeleitend verbunden ist, wobei das Gehäuse ein Kunststoffgehäuse ist und eine Gehäusewand aufweist. In der Gehäusewand sind wenigstens zwei zueinander benachbarte Wandbereiche ausgebildet, wobei die Wärmesenke als ein wärmeleitfähiger Wandbereich der Wandbereiche des Gehäuses ausgebildet ist, wobei wenigstens ein weiterer Wandbereich der Wandbereiche eine zu dem wärmeleitfähigen Wandbereich kleinere Wärmeleitfähigkeit aufweist. Erfindungsgemäß ist der wärmeleitfähige Wandbereich durch einen Duroplast gebildet, welcher mittels Ultraviolett-Strahlen auspolymerisiert ist.
Abstract:
Molding optical components with fine (e.g., micron-scale) features from optical adhesive or polymer can be difficult because the optical components often stick to the mold. If the component sticks to the mold, then either the component or the mold may be damaged or destroyed as the component is removed from the mold. This damage can be reduced or avoided altogether by illuminating the interface between the component and the mold with ultraviolet (UV) light before releasing the component from the mold. The UV light reduces the adhesive forces that cause the component and the mold to stick together, making it easier to remove the component from mold without damaging either the mold or the component.
Abstract:
Disclosed is a photocurable resin composition for additive fabrication comprising a polymerizable component that is polymerizable by free-radical polymerization, cat ionic polymerization, or both free-radical polymerization and cationic polymerization, and a photoinitiating system capable of initiating the free-radical polymerization, cationic polymerization, or both free-radical polymerization and cationic polymerization. The photocurable resin composition is a liquid at about 25 °C, and is capable of curing to provide a solid upon irradiation with light emitted from a light emitting diode (LED), wherein the light has a wavelength of from about 100 nm to about 900 nm. Also disclosed is a three-dimensional article prepared from the photocurable resin composition for additive fabrication, and a process for preparing three-dimensional articles by additive fabrication.
Abstract:
Die Erfindung betrifft eine kühlbare Bestrahlungs- und Formeinheit zum Härten lichthärtender Polymerzusammensetzungen, ein Verfahren zur Herstellung von gehärteten Polymerformkörpern oder mit gehärteten Polymeren beschichteten Körpern unter Verwendung der kühlbaren Bestrahlungs- und Formeinheit sowie die Verwendung dieser Bestrahlungseinheit zur Herstellung von Polymerformkörpern oder mit Polymeren beschichteten Körpern.
Abstract:
The invention relates to a substrate-based method for forming a three-dimensional object by additive fabrication by coating a liquid radiation curable resin comprising from 30 to 80 wt% of cationically curable compounds on a substrate, contacting the liquid radiation curable resin with a previously cured layer, selectively exposing the layer of liquid radiation curable layer to actinic radiation thereby forming a cured layer, separating the cured layer at the substrate, and repeating the steps a sufficient number of time in order to build up a three-dimensional object.
Abstract:
Presently described is a microstructured mold prepared from a photocured polymeric material that comprises at least one (i.e. first) photoinitiator having certain absorption characteristics. The mold is suitable for use in methods of molding a (e.g. barrier rib) microstructure precursor composition that comprises at least one (i.e. second) photoinitiator. The second photoinitiator of the microstructure precursor preferably has similar absorptions characteristics as the first photoinitiator. Thus, the polymeric material of the mold the microstructure precursor can be cured with the same wavelength range of light.
Abstract:
An adaptable mold assembly (10) consists of two mold bases (100, 102). One or both of the mold bases has at least one interchangeable portion (104, 105) removably mounted on the mold base, whose function is to actuate in a direction different from the draw direction. The interchangeable portion is typically used to facilitate the removal of the molded part from the mold, and often functions as a mold slide or pull. The ability to interchange and reconfigure the mold base reduces tooling costs and adds design flexibility to the tool. In another embodiment of the invention, the function of the interchangeable portion (106) is to provide process monitoring, process control or process optimization.
Abstract:
A method of forming a three-dimensional object, comprises providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; filling the build region with a polymerizable liquid; irradiating the build region through the optically transparent member to form a solid polymer from the polymerizable liquid while concurrently advancing the carrier away from the build surface to form the three-dimensional object from the solid polymer, while also concurrently: (i) continuously maintaining a dead zone of polymerizable liquid in contact with the build surface, and (ii) continuously maintaining a gradient of polymerization zone between the dead zone and the solid polymer and in contact with each thereof, the gradient of polymerization zone comprising the polymerizable liquid in partially cured form. Apparatus for carrying out the method is also described.