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Manufacturing method of surface mount inductor

A technology of surface mounting and manufacturing methods, which is applied in the manufacture of inductors/transformers/magnets, transformer/inductor shells, and coils. question

Active Publication Date: 2018-11-02
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in this case, it is necessary to provide a mechanism for holding the lead-out end of the coil in the molding die, and thus the price of the molding die becomes expensive.
In addition, the sealing material tends to leak from the portion of the molding die that holds the lead-out end of the coil, causing large burrs on the molded body.
In addition, when the conductive wire constituting the coil is thickened, there is a problem that the space between the molding die and the coil is narrowed, and the filling material cannot enter, resulting in deterioration of characteristics.

Method used

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  • Manufacturing method of surface mount inductor
  • Manufacturing method of surface mount inductor
  • Manufacturing method of surface mount inductor

Examples

Experimental program
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Effect test

no. 1 approach

[0038] A surface mount inductor as described above is manufactured as follows. In this embodiment, a molding die having a cavity formed by a die 4 composed of a split die 4a and a split die 4b and a lower die 5 and having a punch 6 inserted into the cavity is used. First, for the sheet member 2 that makes the lead-out end 1b of the coil 1 along the outer side of the columnar protrusion 2a, so that the lead-out end 1b of the coil 1 is sandwiched between the columnar protrusion 2a of the sheet member 2 and the inner wall of the split mold 4b The thin sheet part 2 is loaded in the state after the combined mold 4a is removed by holding the method or as in image 3 In the cavity of the state after loosening the split mold 4a as shown. At this time, the side surface of the sheet member 2 perpendicular to the side from which the lead-out end 1b of the coil 1 is pulled out and parallel to the winding shaft is formed beyond the original size of the cavity of the molding die.

[0039]...

no. 2 approach

[0044] In addition, the above-mentioned surface mount inductor can also be manufactured as follows. In this embodiment, a molding die having a cavity formed by a die 14 composed of a split die 14a and a split die 14b and a lower die (not shown) and having a punch inserted into the die cavity is used. . First, the sheet member 12 on which the coil 11 is placed and the plate-shaped sheet member 13 are loaded in a state where the split mold 14a is removed, or as Figure 10 In the cavity of the state after the split mold 14a is released as shown. At this time, the sheet member 12 on which the coil 11 is placed is loaded such that the lead-out end portion 11b of the coil 11 is sandwiched between the columnar convex portion 12a of the sheet member and the inner wall of the split mold 14b. In addition, the sheet member 12 and the sheet member 13 on which the coil 11 is placed are formed to be perpendicular to the side surface from which the lead-out end portion 11b of the coil 11 i...

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Abstract

The present invention relates to a method of manufacturing a surface mount inductor using a coil formed by winding a lead wire such that a lead-out end is located on the outer periphery of a winding portion, and a sheet member having a positioning mechanism. , and formed so that the size in one direction perpendicular to the winding axis of the coil is larger than the cavity of the molding die, the manufacturing method of the surface mount inductor includes: a first step, in which the coil is placed on the sheet Components, the coil and the sheet member are arranged in the molding die in such a way that the lead-out end of the coil is along the outer side of the sheet member and sandwiched between the outer side of the sheet member and the inner wall surface of the molding die. a temperature compressing the sheet member to the size of the cavity of the molding die by pressurizing a portion of the sheet member formed larger than the cavity of the molding die; and a second process in which the The coil and the sheet member are pressurized by a molding die at the second temperature of the first temperature to form a molded body incorporating the coil.

Description

technical field [0001] The present invention relates to a method of manufacturing a small surface mount inductor. Background technique [0002] Surface mount inductors in which a coil formed by winding a wire material is built into an iron core are widely used. Along with the miniaturization and thinning of electronic equipment such as mobile phones in recent years, miniaturization and reduction in height are also required for electronic components such as surface mount inductors. Therefore, the applicant proposed a small-sized surface mount inductor in which both ends of a flat square wire are led out to the outer periphery, and a method for manufacturing the same in Japanese Patent Laid-Open No. 2010-245473 filed earlier. The wire is wound into a spiral coil, and a preformed sheet part. [0003] In the method of manufacturing a surface mount inductor described in Japanese Patent Application Laid-Open No. 2010-245473, first, a sealing material containing a resin and a fil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/04
CPCH01F41/076H01F41/0246H01F27/02H01F27/28H01F27/29H01F41/04H01F41/06
Inventor 宗内敬太村上诚
Owner MURATA MFG CO LTD