Production of a coil, permanent mold for a coil, and coil

Abstract

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 the permanent mold for carrying out the method and to a coil which has been produced using the method or using the permanent mold.

Description

technical field [0001] The invention relates to a method for producing a screw. The invention further relates to a permanent mold for producing a screw and to a screw produced by the method or by the permanent mold. Background technique [0002] For example, spirals used as electrical coils are often wound according to the prior art. During this process, winding is sometimes performed manually in order to improve fill levels compared to batch processes. Significant improvements in performance have recently been achieved by casting coils. [0003] Document DE 10 2012 212 637 A1 describes the casting production of coils. This type of production allows the unfavorable fill factor for spoolable round wires to be significantly exceeded by using other wire geometries (which may not normally be spoolable), thereby improving performance. [0004] For coils produced by casting techniques, for complex geometries, existing techniques involve inserting cores or using slides in addit...

AI Technical Summary

Problems solved by technology

[0004] For coils produced by casting techniques, for complex geometries, existing techniques involve inserting cores or using slides in addition to molds, which can make production expensive or inefficient

[0005] In addition, due to the high casting temperature, the mold is subjected to high stress, which may lead to erosion and cracks of the mold

This damage results in the formation of raised burrs on the coil surface

Burrs can negatively affect the quality of the manufactured coils and require extensive finishing

As a result, the production process is complicated and the molds used have a very short service life, so the production of cast coils has hitherto generally not been very economical

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