Method for producing an induction component and an induction component

• US 9,761,373 B2
• Filed: 03/30/2015
• Issued: 09/12/2017
• Est. Priority Date: 04/23/2014
• Status: Active Grant

• Current Assignee: Wurth elektronik eisos gmbh & co. kg
• Original Assignee: Wurth elektronik eisos gmbh & co. kg
• Inventors: Stark, Markus, Richter, Klaus, Degen, Dorian
• Primary Examiner(s): Chan, Tsz
• Application Number:
  US14/896,203
• Publication Number:
  US 20170032892A1
• Time in Patent Office: 897 Days
• Field of Search: 336 83, 336200, 336232, 296021
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 41/04 for manufacturing coils coils for transformer or inductances H01F27/28
• CPC Class Codes: H01F 41/10 Connecting leads to windings making electric connections in general H01R43/00

Abstract

The invention proposes a method of producing induction components. A plurality of coils are embedded, with predetermined orientation of the coil ends, in a block made of in particular pulverulent substrate. The block is positioned on a plate having a marking for each coil. The combination made up of block and plate is pressed. The winding ends are exposed by milling and provided with contacts. The block is then sawn up mechanically into individual elements each containing a coil.

Claims

1. A method of producing induction components (24), having the following method steps:

a multiplicity of individual coils (8) with the two ends (6, 7) of the windings projecting out of the coil body are produced;

each coil (8) of the multiplicity of coils (8) is embedded, with predetermined orientation of the winding ends (6, 7), in a block (1) made of a pulverulent substrate;

the block (1) is positioned on a plate (15) having a marking (17) for each coil (8), wherein the number of markings (17) corresponds to the number of coils (8);

the combination made up of block (1) and plate (15) is pressed,

the block (1) is then divided up into individual induction components (24).

2. The method as claimed in claim 1, characterized in that the markings (17) are arranged such that, once the block (1) has been divided up into individual induction components (24), each induction component (24) has an impression of a marking (17) on its upper side, wherein the upper side is located opposite an underside of the induction component (24) with winding ends exposed.

3. The method as claimed in claim 1, characterized in that the markings (17) are arranged such that the markings (17) end up located in each case within a surface region of the block (1) which is assigned to a respective coil, wherein the surface regions of the block (1) which are assigned to the individual coils do not overlap.

4. The method as claimed in claim 1, wherein the block (1) is pre-pressed and the pre-pressed block is positioned on the plate (15).

5. The method as claimed in claim 4, wherein the pre-pressing operation takes place in accordance with a time/pressure profile.

6. The method as claimed in claim 1, wherein the combination made up of block (1) and plate (15) is pressed isostatically.

7. The method as claimed in claim 1 having the following method steps:

following the, in particular isostatic, pressing operation, the ends (6, 7) of the coil windings are exposed,

the exposed ends (6, 7) of the coil windings are provided with connection contacts;

the block (1) is then divided up to form the individual induction components.

8. The method as claimed in claim 1, wherein the operation of exposing the winding ends (6, 7) takes place mechanically.

9. The method as claimed in claim 1, wherein the winding ends (6, 7) are bent such that they run transversely to the axis of the coil.

10. The method as claimed in claim 1, wherein the winding ends (6, 7) project beyond the outer contour of the coil body.

11. The method as claimed in claim 1, wherein a coil (8) is provided with a core prior to being embedded in the block (1).

12. The method as claimed in claim 1, wherein, use is made of a plate (15) with a low level of surface roughness, in particular R 0.1 μ

m or less.

13. The method as claimed in claim 1, wherein prior to the isostatic pressing operation, a layer made of elastic material is positioned on the side (2) of the block (1), said side being located opposite the plate (15).

14. The method as claimed in claim 1, wherein the isostatic pressing operation is carried out in a liquid-filled pressure vessel (14).

15. An induction component (24) with a coil (8), produced by a method as claimed in claim 1 wherein the induction component (24) has an impression of a marking (17) on its upper side, wherein the upper side is located opposite an underside of the induction component (24) with winding ends exposed, and wherein the impression is designed in the form of a hole (21), which is an indication of the orientation of the start of the winding.