Herstellung einer Wendel, Dauerform für eine Wendel sowie Wendel

The invention relates to a method for producing a coil (2), having a step of providing a permanent mold (1) with mold halves (1.1, 1.2) which can be joined together on a mold separation plane (1.5). The method additionally has a step of joining together the mold halves (1.1, 1.2) of the permanent mold (1) such that the permanent mold (1) has a cavity (1.3), which defines the shape of the coil (2) or the shape of a bent open coil (2'), when the permanent mold is joined together, wherein the specified coil (2) or the bent open coil (2') has a flattened profiled winding cross-section which has two opposite flat faces (2.1, 2.1'), an outer face (2.2) and an inner face (2.3) opposite the outer face (2.2), and the mold separation plane (1.5) runs at least partly along the outer face (2.2) and/or the inner face (2.1) and/or edges of the profiled winding cross-section. The method additionally has a step of removing burrs (3) extending on the outer face (2.2) and/or the inner face (2.3) and/or the edges of the cast body on the mold separation plane (1.5). The invention further relates to a permanent mold for carrying out the method and to a coil which has been produced using the method or using the permanent mold

Herstellung einer Wendel, Dauerform für eine Wendel sowie Wendel

The invention relates to a method for producing a coil (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 coil (2) or the shape of a bent open coil, when the permanent mold is joined together. The specified coil (2) or the bent open coil 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'). The invention further relates to a permanent mold for carrying out the method and to a coil which has been produced using the method or using the permanent mold

Development of a high pressure die casting tool for partial integration of glass fiber structures

Due to the growing demand for lightweight solutions in a wide range of industries, the selection and combination of various materials is becoming more and more important. As a result, the need for suitable joining technologies is increasing along with it. Within the DFG research group "Schwarz-Silber" ("black-silver"), Fraunhofer IFAM is investigating so-called transitional structures in cooperation with the University of Bremen. In this process, glass fiber structures are integrated into aluminum by a high pressure die casting process. These structures are used for the electrochemical insulation between aluminum and carbon fiber textiles, which are connected by textile processes in a subsequent production step. A solid hybrid structure is finally achieved through a resin-impregnation process. The key challenges are the positioning, pre-tensioning and infiltration of the glass fiber structures within the high pressure die casting process. In order to meet these challenges, a customized die casting tool was developed within the project. With the aid of mold-filling simulations, the die system of the die casting tool was optimized to achieve better infiltration of the fiber bundles and to additionally support the position of the glass fibers in the casting process. After the design of the molding tool, the implementation was carried out in collaboration with a toolmaker. In subsequent, up-to-date investigations, the positioning and infiltration of different variants of glass fiber structures is evaluated. The results are compared with previous attempts to position and infiltrate the glass fiber structures to assess the effect of the optimized newly designed tool

Gießkern für Gießformen sowie Verfahren zu dessen Herstellung

The present invention relates to a casting core for casting moulds, 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. 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

Verfahren zur Herstellung eines Bauteilsmit einer Verbundsstruktur sowie mit dem Verfahren herstellbares Bauteil

Producing a component with a composite structure, comprises introducing at least one molded part (1) made of fiber composite material into a casting mold, providing a section of the molded part with a covering, and casting at least one section of the molded part with the metallic material in a casting process, or connecting at least one section of the molded part with the metallic material, providing the covering for the section of the molded part, introducing the covering in the casting mold, casting with the metallic material, and connecting the molded part with the covering. Producing a component with a composite structure made of a fiber composite material and a metallic material, comprises introducing at least one molded part (1) made of fiber composite material into a casting mold, providing a section of the molded part with an electrically insulating covering, prior to the casting process for preventing a contact of the fiber composite material with the metal material and connecting with the molded part and the metallic material in a positive- and/or force-fitting manner, and casting at least one section of the molded part with the metallic material in a casting process, or connecting at least one section of the molded part made of the fiber composite material with the metallic material, providing the electrically insulating covering at least for the section of the molded part, introducing the electrically insulating covering in the casting mold and casting with the metallic material in the casting process, and connecting the molded part with the electrically insulating covering, after the casting process. An independent claim is also included for the component comprising the composite structure made of the fiber composite material and the metallic material, where at least one section of the molded part is embedded in a matrix made of the metallic material and is separated by the electrically insulating covering from the metallic material

Gießform zum Gießen von Bauteilen sowie Verfahren zu deren Herstellung

The present invention relates to 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 one or more ceramic casting mold inserts introduced into the at least one casting mold frame. The casting mold insert or casting mold inserts have the negative contour or a part of the negative contour of a component to be produced or the combination of a component to be produced with one or more casting cores. The present invention further relates to a method for producing the casting mold according to the invention and to the use of the casting mold according to the invention

Gießkern für Gießformen sowie Verfahren zu dessen Herstellung

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

Gießkern für Gießformen sowie Verfahren zu dessen Herstellung

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 &bullopr; 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

Verfahren zum Gießen eines Bauteils komplexer Geometrie mit einer Gießform in Segmentbauweise

Die vorliegende Erfindung betrifft ein Verfahren zum Gießen eines Bauteils komplexer Geometrie, bei dem eine Gießform eingesetzt wird, von der wenigstens ein Formteil als verlorene Form ausgebildet ist. Das wenigstens eine als verlorene Form ausgebildete Formteil wird dabei aus einem Salz oder einer Salzmischung hergestellt. Wenigstens ein äußerer oder innerer Teil der Gießform, durch den die äußere bzw. innere Geometrie des Bauteils festgelegt wird, wird bei dem Verfahren aus mehr als zwei Formsegmenten zusammengesetzt, die vorzugsweise übereinander gestapelt werden. Das Verfahren ermöglicht das Gießen von Bauteilen komplexer Geometrie mit hoher Oberflächenqualität in kostengünstiger Weise