Abstract: The present application creates a roller molding method for producing a spiral structure or a coil, in particular a spiral structure for use in electric machines, wherein material is supplied between a first roller and a second roller running opposite thereto, wherein the first roller has first teeth, and the second roller has second teeth, said first and/or second teeth having tooth flanks with cavities for receiving the supplied material, wherein the teeth are designed and aligned such that the cavity of at least one tooth is at least temporarily delimited by the surface of a tooth of the other roller when the rollers are rotating such that the supplied material is molded between the teeth into a portion of the spiral structure or the coil.

Abstract: The invention relates to a method for producing a helical metal body (1, 1?), in particular made of aluminum or an aluminum alloy. A blank is first produced in a primary shaping process, a metal forming process, or in a removal process, in particular a machining process, and one or more recesses (100, 101, 201, 202, 203) are then introduced into the blank using a removal process, said recesses defining a circumferential coil, the adjacent windings thereof being mutually spaced, in particular electrically insulated from one another.

Abstract: A roller casting method produces a spiral structure, in particular a spiral structure for use in electric machines. Molten metal is supplied between a first roller and a second roller miming opposite thereto, wherein the first roller has first teeth, and the second roller has second teeth, said first and/or second teeth having tooth flanks with cavities for receiving the supplied molten metal. The teeth are designed and aligned such that the cavity of at least one tooth is at least temporarily delimited by the surface of a tooth of the other roller when the rollers are rotating such that the supplied molten metal is molded between the teeth while cooling and is molded into a section of the spiral structure.

Abstract: The present invention relates to an arrangement for low-pressure casting of refractory metals, with a furnace chamber with one or a plurality of gas supply openings (6) and gas outlet openings (7), and a riser pipe (8) through a cover (5) of the furnace chamber, a melting container (3, 12) for the refractory metals arranged in the furnace chamber, and a heating device for heating the refractory metals in the melting container (3, 12). In the proposed arrangement, the melting container (3, 12) is formed as an exchangeable insert for a receiving mould (2) supporting the melting container (3, 12), which is arranged in the furnace chamber, wherein a thermally insulating layer (4, 17) is formed between the receiving mould (2) and the melting container (3, 12), or is integrated into the melting container (3, 12). With the proposed arrangement, a quick and easy exchange of the melting container for different alloys can also be carried out in the low-pressure casting of refractory metals.

Abstract: A casting core for casting moulds can include a central core and a core shroud arranged around the central core. The core shroud containing contains or consists of ceramic particles bound to a binder. The central core contains ceramic particles bound to a binder, wherein the ceramic particles of the central core contain at least one component, which exhibits, at a temperature in a range from 100° C. to 1500° C., a thermally induced phase transformation, and/ or at least two components, the thermal expansion coefficients of which at 20° C. differ by at least 5·10?6K?1.

Abstract: The present invention relates to a casting core for casting molds, wherein the casting core contains or consists of ceramic particles bound with a silica sol. The casting core has a pore structure, in which the average pore size of the pores increases at least in sections from the outside to the inside in the casting core. The present invention also relates to a method for producing the casting core according to the invention and to the use of the casting core according to the invention.

Abstract: The invention relates to the use of a carbonaceous coating for protection of a passive electrical component from attack by ammonia, wherein the carbonaceous coating is a sol-gel coating or a plasma-polymeric coating. This coating comprises a particular carbon content.

Abstract: The invention relates to a passive electrical component, especially a coil, having an interlayer, wherein the interlayer has a lower coefficient of thermal expansion than the surface of the passive electrical component covered with the interlayer, and disposed atop that a plasma-polymeric carbon-containing coating having a carbon content measured at a depth of 80 nm away from the side of the plasma-polymeric coating remote from the interlayer, wherein the plasma-polymeric coating comprises a carbon content of 50 to 100 atom %, preferably 50 to 90 atom %, or is configured as an organometallic coating a carbon content of 2 to 50 atom %, in each case measured by means of XPS.

Abstract: Disclosed herein are systems and methods for production and use of a casting mold for casting components. The casting mold comprises at least one casting mold frame made of metal and/or of an alloy, and also one or more ceramic casting mold inserts introduced into the at least one casting mold frame. The casting mold insert(s) have the negative contour or part of the negative contour of a component to be produced or of the combination of a component to be produced with one or more casting cores.

Abstract: Disclosed herein is a casting core for casting molds, the casting core comprising an inner core and an outer core arranged around the inner core. The outer core contains or consists of ceramic particles bound with a binder. The inner core contains ceramic particles bound with a binder and additionally one or more placeholder elements. The placeholder element(s) is/are at least partially thermally decomposable. Also disclosed is a method for producing the casting core and use of the casting core.

Abstract: The present invention relates to an arrangement for low-pressure casting of refractory metals, with a furnace chamber with one or a plurality of gas supply openings (6) and gas outlet openings (7), and a riser pipe (8) through a cover (5) of the furnace chamber, a melting container (3, 12) for the refractory metals arranged in the furnace chamber, and a heating device for heating the refractory metals in the melting container (3, 12). In the proposed arrangement, the melting container (3, 12) is formed as an exchangeable insert for a receiving mould (2) supporting the melting container (3, 12), which is arranged in the furnace chamber, wherein a thermally insulating layer (4, 17) is formed between the receiving mould (2) and the melting container (3, 12), or is integrated into the melting container (3, 12). With the proposed arrangement, a quick and easy exchange of the melting container for different alloys can also be carried out in the low-pressure casting of refractory metals.

Abstract: A motor housing for an electric motor may have an inner part having a hollow-cylindrical base body and at least one rib arranged on the outside of the base body and a casing slipped over the inner part and contacting the at least one rib. A cooling channel may be formed between the inner part and the casing.

Abstract: The invention relates to a method for producing a helical metal body (1, 1?), in particular made of aluminum or an aluminum alloy. A blank is first produced in a primary shaping process, a metal forming process, or in a removal process, in particular a machining process, and one or more recesses (100, 101, 201, 202, 203) are then introduced into the blank using a removal process, said recesses defining a circumferential coil, the adjacent windings thereof being mutually spaced, in particular electrically insulated from one another.

Abstract: The invention relates to a casting core for casting moulds, wherein the casting core comprises a central core and a core shroud arranged around the central core. The core shroud contains or consists of ceramic particles bound to a binder. The central core contains or consists of ceramic particles bound to a binder, wherein the ceramic particles of the central core contain or consist of at least one component, which exhibits, at a temperature in a range from 100° C. to 1500° C., a thermally induced phase transformation, and/or at least two components, the thermal expansion coefficients of which at 20° C. differ by at least 5·10?6 K?1. The invention further relates to a method for producing the casting core according to the invention and the use of the casting core according to the invention.

Abstract: The invention relates to a method for producing a helix (2). A permanent mold with mold halves which can be joined together on a mold separation plane is provided. The mold halves of the permanent mold are joined together such that the permanent mold has a cavity, which defines the shape of the helix (2) or the shape of a bent-up helix, when the permanent mold is joined together. The specified helix (2) or the bent-up helix has a flattened profiled winding cross-section which has two opposite flat faces (2.1, 2.1?), an outer face and an inner face (2.3) opposite the outer face. The mold separation plane runs at least partly along the flat faces (2.1, 2.1?) from the inner face to the outer face (2.3), wherein the permanent mold has a bulge (2.5) which extends along the mold separation plane and protrudes into the cavity at least in a region in which the mold separation plane runs along one of the flat faces (2.1, 2.1?) such that the cast body is provided with recesses (2.5) on the flat faces (2.1, 2.1?).

Abstract: A method for producing a spiral-shaped body, in particular an electric coil, made of an electrically conductive material. First, the material is wound about a mandrel in a casting mold in order to form a coil with a plurality of windings, and pressure is then exerted onto the coil in the axial direction of the coil. The pressure leads to a deformation and compression of the cross-section of the individual windings in the axial direction of the coil. By compressing the coil, an optimal use of space is achieved with an electric coil, for example for an electric machine.

Abstract: A method for producing a helical, electrically conducting body. The method including: producing a helical pattern as a lost mold made of a pattern material that can be at least one of liquefied and evaporated under the action of heat; covering the helical pattern with an insulating layer; embedding the helical pattern in foundry sand; pouring a metallic casting material into the lost mold, displacing the pattern material, and bonding with the insulating layer to form a cast body; and removing the cast body, together with the insulating layer adhering thereto, from the foundry sand.

Abstract: The invention relates to a roller casting method for producing a spiral structure, in particular a spiral structure for use in electric machines. Molten metal is supplied between a first roller and a second roller miming opposite thereto, wherein the first roller has first teeth, and the second roller has second teeth, said first and/or second teeth having tooth flanks with cavities for receiving the supplied molten metal. The teeth are designed and aligned such that the cavity of at least one tooth is at least temporarily delimited by the surface of a tooth of the other roller when the rollers are rotating such that the supplied molten metal is molded between the teeth while cooling and is molded into a section of the spiral structure.

Abstract: The invention relates to a casting mould for producing helical cast bodies (1), in particular coils, springs or spirals, having a mould (10) in the form of a permanent mould which determines the outer contour of the helical body and consists of a ceramic material or is coated by a ceramic material; a supporting tool (8), which supports the mould (10) from outside; and a mould core (12), which defines the continuous opening within the helical body (1) and consists of a ceramic material or is coated by a ceramic material, the mould core being formed in particular as a core puller.

Abstract: The present application creates a roller molding method for producing a spiral structure or a coil, in particular a spiral structure for use in electric machines, wherein material is supplied between a first roller and a second roller running opposite thereto, wherein the first roller has first teeth, and the second roller has second teeth, said first and/or second teeth having tooth flanks with cavities for receiving the supplied material, wherein the teeth are designed and aligned such that the cavity of at least one tooth is at least temporarily delimited by the surface of a tooth of the other roller when the rollers are rotating such that the supplied material is molded between the teeth into a portion of the spiral structure or the coil.