Abstract: A subject of the invention is a fluidized-bed reactor for producing granular polycrystalline silicon. The fluidized-bed reactor comprises a segmented reactor tube, which is disposed between a reactor top and a reactor bottom, a heating facility, at least one nozzle for supplying fluidizing gas, at least one nozzle for supplying reaction gas, a facility for supplying silicon seed particles, a product removal line, and an offgas removal line. The segmented reactor tube comprises a base segment and at least one spacer segment, there being disposed, between base segment and spacer segment, a flat seal made from a carbon-containing material, the spacer segment consisting of a material which, within a temperature range from 100 to 950° C., has a thermal conductivity of <2 W/mK.

Abstract: A molding tool and method for producing an interior trim part. A cavity is embodied between a first element and a second element, and a slide is displaceably connected to the first element. A decorative layer is arranged on the first element and a backing is arranged on the second element. A foamable mixture is added to the hollow area between the backing and a reverse side of the decorative layer, such that a foam layer fills the hollow area. A distance between the first element and the second element is increased to enlarge the hollow area. During this process, the slide is pressed against a side facing away from the reverse side of the decorative layer, such that the hollow area is sealed with the reverse side of the decorative layer pressed against a lateral surface of the backing and/or against a lateral surface of the second element.

Abstract: A subject of the invention is a fluidized-bed reactor for producing granular polycrystalline silicon. The fluidized-bed reactor comprises a segmented reactor tube, which is disposed between a reactor top and a reactor bottom, a heating facility, at least one nozzle for supplying fluidizing gas, at least one nozzle for supplying reaction gas, a facility for supplying silicon seed particles, a product removal line, and an offgas removal line. The segmented reactor tube comprises a base segment and at least one spacer segment, there being disposed, between base segment and spacer segment, a flat seal made from a carbon-containing material, the spacer segment consisting of a material which, within a temperature range from 100 to 950° C., has a thermal conductivity of <2 W/mK.

Abstract: Plastic material-comprising surfaces of a substrate are coated with elemental silicon by cold gas spraying by injecting a powder containing silicon into a gas and powder with a high velocity onto the substrate surface, such that the silicon forms a firmly adherent coat on the substrate surface comprising the plastics material. Apparatuses having such silicon-coated surfaces are useful in minimizing contamination of polycrystalline silicon production, processing, packaging, and transport.

Abstract: Control of the flow of granular polysilicon granules is effected by employing an elastomeric pinch sleeve valve. The flow control by this method is especially useful for controlling the flow of silicon seed particles and granular polysilicon product in the fluidized bed method for producing polysilicon. The flow may be stopped without gas leakage, and is suitable for use over long operating campaigns.

Abstract: A device for manufacturing inner trim elements which are formed by a rigid carrier and a cover layer, between which elements a polymer foam layer is arranged. The carrier is fixable on a first molding tool element, and the cover layer is fixable between the outer edge of the first molding tool element and the outer edge of a second molding tool element. In the molding tool, a cavity is formed between the carrier and the cover layer, wherein a foamable polymer is introducible into the cavity via at least one through-hole which is formed in the carrier and the first molding tool element. The distance between the first and the second molding tool element is enlargeable during the foaming process. At least one through-hole for an escape of air and reactively formed gases out of the cavity is formed in the carrier and in the first molding tool element.

Abstract: Control of the flow of granular polysilicon granules is effected by employing an elastomeric pinch sleeve valve. The flow control by this method is especially useful for controlling the flow of silicon seed particles and granular polysilicon product in the fluidized bed method for producing polysilicon. The flow may be stopped without gas leakage, and is suitable for use over long operating campaigns.

Abstract: Campaigns for the production of polycrystalline silicon granules in a fluidized bed process are lengthened by employing an inner reaction tube within the fluidized bed reactor which has a low ash content, preferably a coefficient of thermal expansion similar to that of silicon carbide, and has a silicon carbide coating layer consisting of at least 99.995 wt. % of silicon carbide with a thickness of from 5 ?m to 700 ?m.

Abstract: An inner trim part for a motor vehicle, with a first layer which faces an interior of the motor vehicle after the installation of the inner trim part, and a second layer which is away from the interior of the motor vehicle after the installation of the inner trim part. The first layer comprises at least one material or a material composite which absorbs at least 50 percent of an incident electromagnetic radiation in the visible wavelength region and reflects at least 50 percent of an incident electromagnetic radiation in the infrared region. The second layer comprises at least a material or a material composite which reflects at least 50 percent of an incident electromagnetic radiation in the visible wavelength region as well as an electromagnetic radiation in the infrared wavelength region.

Abstract: A molding tool and method for producing an interior trim part. A cavity is embodied between a first element and a second element, and a slide is displaceably connected to the first element. A decorative layer is arranged on the first element and a backing is arranged on the second element. A foamable mixture is added to the hollow area between the backing and a reverse side of the decorative layer, such that a foam layer fills the hollow area. A distance between the first element and the second element is increased to enlarge the hollow area. During this process, the slide is pressed against a side facing away from the reverse side of the decorative layer, such that the hollow area is sealed with the reverse side of the decorative layer pressed against a lateral surface of the backing and/or against a lateral surface of the second element.

Abstract: A device for manufacturing inner trim elements which are formed by a rigid carrier and a cover layer, between which elements a polymer foam layer is arranged. The carrier is fixable on a first moulding tool element, and the cover layer is fixable between the outer edge of the first moulding tool element and the outer edge of a second moulding tool element. In the moulding tool, a cavity is formed between the carrier and the cover layer, wherein a foamable polymer is introducible into the cavity via at least one through-hole which is formed in the carrier and the first moulding tool element. The distance between the first and the second moulding tool element is enlargeable during the foaming process. At least one through-hole for an escape of air and reactively formed gases out of the cavity is formed in the carrier and in the first moulding tool element.

Abstract: Plastic material-comprising surfaces of a substrate are coated with elemental silicon by cold gas spraying by injecting a powder containing silicon into a gas and powder with a high velocity onto the substrate surface, such that the silicon forms a firmly adherent coat on the substrate surface comprising the plastics material. Apparatuses having such silicon-coated surfaces are useful in minimizing contamination of polycrystalline silicon production, processing, packaging, and transport.

Abstract: A fluidized-bed reactor for preparing granular polycrystalline silicon has a reactor vessel, a reactor tube and a reactor bottom within the reactor vessel, and an intermediate jacket located between the reactor tube and the reactor vessel, a heating device, at least one bottom gas nozzle for introducing of fluidizing gas and at least one secondary gas nozzle for introducing reaction gas, a silicon seed particle feed, an offtake line for granular polycrystalline silicon and reactor offgas discharge, wherein a main element of the reactor tube comprises at least 60% by weight of silicon carbide with a CVD coating having a layer thickness of at least 5 ?m and is at least 99.995% by weight of SiC, or a main element of the reactor tube is a sapphire glass comprising at least 99.99% by weight of ?-Al2O3.

Abstract: An inner trim part for a motor vehicle, with a first layer which faces an interior of the motor vehicle after the installation of the inner trim part, and a second layer which is away from the interior of the motor vehicle after the installation of the inner trim part. The first layer comprises at least one material or a material composite which absorbs at least 50 percent of an incident electromagnetic radiation in the visible wavelength region and reflects at least 50 percent of an incident electromagnetic radiation in the infrared region. The second layer comprises at least a material or a material composite which reflects at least 50 percent of an incident electromagnetic radiation in the visible wavelength region as well as an electromagnetic radiation in the infrared wavelength region.

Abstract: The invention pertains to a method for manufacturing an interior trim component that features a special injection molding process and a selective back-foaming process.

Abstract: The invention relates to a process for the production of a composite part with a multi-part outer layer and with a foam layer bonded on the reverse side to the outer layer, in particular internal cladding of a vehicle, and also to a composite part. The inventive process comprises the following steps: a) arrangement of a first skin and of a second skin with angled-off end regions on the surface of a mold in such a way that the angled-off end regions of the first and second skin have firstly been oriented away from the surface of the mold and secondly are adjacent to one another; b) application of a reduced pressure in the region of the position of the angled-off end regions, in such a way that the angled-off end regions are pressed two-dimensionally against one another; c) reverse-side foaming of the first and second skin with a foam composition. The inventive process permits the simple production of visually attractive composite parts with multi-part outer layer.

Abstract: Silicon granules are conveyed in an encapsulated conveying channel by swaying movement of the channel produced by a permanent magnet excited by an external alternating electromagnetic field.

Abstract: The invention relates to a method for producing a composite part, in particular an internal paneling part for vehicles, having a multipart cover layer, and a composite part.

Abstract: A component is produced according to the following steps: a) insertion at least of two skins into the second tool half of a tool having a cavity-forming first tool half and second tool half such that the skins overlap in their end regions; b) rear-foaming or rear-spraying of the skins with a foam material or spraying material, c) by exerting low pressure in the region of the overlap, the internally situated end region of the one skin being pressed against the externally situated end region of the other skin in a foam-tight or injection molding-tight manner.

Abstract: The invention pertains to a method for manufacturing an interior trim component that features a special injection molding process and a selective back-foaming process.