JPH03272121A - Manufacture of transformer - Google Patents

Abstract

PURPOSE:To make it possible to secure the winding position of all widths and heights in a highly precise manner, various types of spacers are abbreviated, to cut down the cost and to obtain high efficiency for the title transformer. CONSTITUTION:A number of holes are perforated through the flange 12 of a coil bobbin 11 so that insulating resin 19 will be passed through easily, and a plurality of winding position controlling jigs 14 are provided circumferentially on the winding position to be controlled against the bobbin 11. Then, after a self-welding conductor has been wound as a winding 15, it is heated up by applying a current or hot air using a jig 14, a solvent is applied thereon and hardened, and after an interlayer insulating sheet 16 has been wound, the above-mentioned process is repeated, and all winding operations are finished. Subsequently, the magnetic core 17 is incorporated into the above-mentioned material, they are inserted into a case 18, and after resin 19 has been poured into a mold, a bottom plate 20 is fitted, and a transformer is completed. As a result, various types of expensive spacers and the control of those material can be omitted, and as the standerdization of material can be achieved, works can be automated easily, a fixing tape can be omitted, and the title transformer, having high insulating property, high precision and high efficiency, can be obtained at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing a transformer used in various electronic devices.

Conventional technology In recent years, transformers have become lighter, thinner, shorter, and smaller.
The specific emphasis has shifted from low-frequency to high-frequency types, and high precision winding position between each winding is required.

There is a growing demand for more reliable insulation methods and, conversely, for lower costs.

In response to such requirements, conventional transformers have been manufactured as shown in FIG.

That is, in FIG. 2B, various types of Nupaca 4 are inserted into the terminal 3 and the coil bobbin 2 having the collar 1 at both ends, as shown in FIG.
After wrapping the interlayer insulating sheet 6 and repeating the steps shown in FIG. 2 b to c a predetermined number of times, a magnetic core 7 made of ferrite such as EE type is attached to the coil bobbin 2 as shown in FIG. 2 d. It was assembled and inserted into a case 8 as shown in FIG. 2e, and then an insulating resin 9 was cast and a bottom plate 10 was fitted.

Furthermore, as shown in Figure 2e, there were some cases in which case insertion and insulating resin casting were not performed.

Problems to be Solved by the Invention However, in the above-mentioned conventional manufacturing method, various spacers 4 must be inserted in the third base 72, resulting in high material costs and high material costs due to the use of a large number of spacers 4.
There have been problems in that it is difficult to manage a huge variety of spacers 4 to accommodate various heights and widths, and it is difficult to automate the insertion of spacers 4.

The present invention solves the above-mentioned conventional problems.

After ensuring highly accurate winding positions of all widths and heights,
The purpose is to provide a low-cost, high-performance transformer that can omit various spacers.

Means for Solving the Problems In order to solve the above problems, the present invention uses a self-bonding conductive wire for the winding whose winding position should be regulated with respect to the coil bobbin, and also provides a jig for regulating the winding position of the coil bobbin. After winding the wire using a self-welding conductor, the winding is integrated by fusing the self-fusing conducting wire. After all the winding is completed, insulating resin is cast into the coil bobbin to form the coil part, and the magnetic core is attached to this coil part. Should I incorporate it?

After all the windings have been completed, the coil bobbin Ka core is assembled, a case is placed over the coil bobbin, and an insulating resin is cast.

Function: This method eliminates the need for various spacers for the winding that should regulate the winding position, and at the same time eliminates the need to manage a huge amount of parts.It also facilitates high-speed automation, and provides low cost, safe and high performance. can be taken as a thing.

EXAMPLE 1 An example of the method for manufacturing a transformer according to the present invention will be described below with reference to the accompanying drawings, FIG.

In the first same color, 11 is a coil bobbin having a terminal 13 and a collar 12 at both ends, and the collar 12 is provided with several holes so that the insulating resin 19 can easily pass through.

In FIG. 1, a plurality of regulating jigs 14 are set in a circumferential manner at the positions of the windings to be regulated with respect to the coil bobbin 11, and the coils 15 are self-fused as shown in FIG. 1C. After winding the conductor wire, conductive heating or hot air heating 1. Heating with a winding position regulating jig 14 5. Applying and curing beneno or solvent, and then interlayer insulation sheet 1
6 and repeat the process in Figure 1 c a predetermined number of times (-
After all the windings are completed, the magnetic core 1 is
7 is assembled into the case 71 as shown in Fig. 1e.
8, and after casting an insulating resin 19, a bottom plate 20 is fitted to complete the transformer.

By using the manufacturing method as described above, the width of each winding position of the winding wire 14 is completely defined, and an expensive spacer can be omitted.

In the winding 14, if the winding position is roughly determined, it is not necessary to use a self-bonding conductor.
It may be used to improve the precision of all windings.

Effects of the Invention As described above, according to the transformer manufacturing method of the present invention, various expensive spacers for windings that regulate the winding position can be omitted, and at the same time, standardization can be achieved by eliminating the need for a huge amount of component management. Therefore, high-speed automation is easy, the fixing tape can be removed, and all six pages can be configured at low cost.Since it is fixed to the insulating resin, it has excellent insulation properties, and the winding position can be adjusted with high accuracy. The ability to improve performance is of great industrial value.

[Brief explanation of drawings]

1A-0 are half-sectional views of each step in an embodiment of the transformer manufacturing method of the present invention, and FIGS. 2A-2E are half-sectional views of each step of the conventional transformer manufacturing method. 11... Coil bobbin, 12... Tsuba,
13...Terminal, 14...Winding position regulation jig, 15...Winding. 16... (interlayer) insulation sheet, 17...
・Magnetic core, 18... Case, 19... Insulating resin, 2o... Bottom plate.

Claims (1)

[Claims] When winding multiple types of conductor wires onto a coil bobbin, self-fusing conductor wire is used for the winding wire whose winding position should be regulated relative to the coil bobbin, and a jig is used to regulate the winding position on the coil bobbin. After that, the self-fusing conducting wire is fused to integrate the windings, and after all the windings are completed, insulating resin is cast into the coil bobbin to form the coil part, and the magnetic core is incorporated into this coil part, or Alternatively, after all winding is completed, a magnetic core is assembled into the coil bobbin, a case is placed over the coil bobbin, and an insulating resin is poured.