JPH0467766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing an inductor in which a magnetic core is passed through and fixed to a substantially U-shaped lead wire.

[Conventional technology]

FIG. 3 is a schematic diagram showing an example of an inductor. The inductor 2 in A is an example in which a magnetic core (for example, ferrite beads) 5 is passed through both legs of a substantially U-shaped lead wire 4 and fixed, and the inductor 3 in B is almost the same as above. This is an example in which a magnetic core 5 is passed through one of the legs of the lead wire 4 and fixed, and both are called radial types.

In manufacturing the inductors 2 and 3 as described above, the magnetic core 5 has conventionally been fixed to the lead wire 4 by applying a thermosetting adhesive in a so-called batch type dipping method.

This will be explained using the inductor 2 as an example with reference to FIG. 4. First, in the first step, the magnetic core 5 is passed through the lead wire 4 to prepare a plurality of parts 2a before being fixed. Then, a plurality of magnetic cores 5 are inserted into the jig 8, and in the third step, using such a jig 8, a portion of each magnetic core 5 is immersed in a thermosetting adhesive 10 to apply the adhesive ( (FIG. 4 shows this state), in the fourth step, the applied adhesive was cured by heating in an electric furnace or the like to obtain a plurality of inductors 2 as described above.

[Problem that the invention seeks to solve]

However, in such a conventional method, it is necessary to pool a certain number of parts 2a as described above before the process such as applying the adhesive described above, which causes waiting time and lowers productivity. There was a problem.

Therefore, the main object of the present invention is to improve productivity by making it possible to continuously fix the magnetic core to the lead wire as described above.

[Means for solving problems]

The manufacturing method of the present invention involves sequentially feeding a plurality of parts in which a magnetic core is passed through a substantially U-shaped lead wire up to just before the predetermined position of the magnetic core. Apply UV-curing and anaerobic-curing adhesive to nearby lead wires, then push the magnetic cores of each component into the lead wires in sequence, and then sequentially irradiate the adhesive on each component with UV rays. It is characterized by curing it.

[Effect]

While sending a plurality of parts, the application of the adhesive, the positioning of the magnetic core, and the curing of the adhesive are performed in sequence, thereby continuously fixing the magnetic core to the lead wire.

〔Example〕

FIG. 1 is a plan view showing an example of an apparatus for carrying out the manufacturing method according to the present invention, and FIG. 2 is an enlarged side view showing the roller and its surroundings in FIG. 1.

In this embodiment, parts 2 as described above are used.
a, in which a plurality of magnetic cores 5 are passed through the lead wire 4 up to the predetermined position and are attached to the tape 12 in succession (i.e., a taping-like workpiece), and this is shown, for example, as shown by the arrow. Send continuously like A.

On the way, a roller 18 is arranged so as to touch the end surface of the lead wire 4 near a predetermined position of the magnetic core 5. This roller 18 rotates, for example, in the direction of arrow B, and is filled with an ultraviolet curable and anaerobic curable adhesive 16 placed in the container 14.
A layer of adhesive 16 is applied to the end surface of the substrate. Therefore, by passing each component 2a over such a roller 18, the adhesive 16 as described above is sequentially applied to the lead wire 4 near a predetermined position of the magnetic core 5.

In a step after applying the adhesive 16, the magnetic core 5 of each component 2a is sequentially pushed into a predetermined position of the lead wire 4 in the direction of an arrow C using, for example, a pin or wire (not shown). As a result, the adhesive 16 exists between the magnetic core 5 and the lead wire 4 inside the magnetic core 5, and a portion of the adhesive 16 protrudes from the end of the magnetic core 5.

In the next step, the adhesive 16 protruding from the component 2a is sequentially irradiated with two types of ultraviolet rays.
Since the adhesive 16 is UV curable, it hardens instantly. With this, the lead wire 4 of the magnetic core 5
Fixing, or at least temporary fixing, is performed to sequentially obtain the inductor 2 as described above.

In that case, the adhesive 16 inside the magnetic core 5
Since it is anaerobic hardening and hardly comes into contact with air, it hardens naturally without any special treatment, thereby fully fixing the magnetic core 5 to the lead wire 4. Therefore, after irradiation with the ultraviolet rays 20, it is possible to proceed directly to the next step.

In FIG. 1, for convenience of illustration, the process of applying the adhesive 16, the process of pushing in the magnetic core 5, and the process of irradiating the ultraviolet rays 20 are shown adjacent to each other, but it is of course possible to separate them from each other. It is.

Therefore, according to the method described above, the magnetic core 5 can be fixed to the lead wire 4 continuously and, if necessary, on an integrated production line, which improves productivity and reduces product costs. reduction is also possible.

Further, by adjusting the circumferential speed of the roller 18 and the feeding speed of the tape 12, the amount of adhesive 16 attached to the lead wire 4 can be easily controlled.

Furthermore, by setting the width of the roller 18 as described above, it is possible to apply the adhesive 16 spot-wise only to the necessary locations, thereby reducing the amount of adhesive 16 consumed.

Although the inductor 2 shown in FIG. 3A has been described above as an example, the present invention can of course also be applied to manufacturing the inductor 3 shown in FIG. 3B.

〔Effect of the invention〕

As described above, according to the present invention, the magnetic core can be fixed to the lead wire continuously and, if necessary, on an integrated production line, which improves productivity and reduces product costs. becomes.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of an apparatus for carrying out the manufacturing method according to the present invention. Figure 2 shows the first
FIG. 2 is an enlarged side view showing the area around the roller in the figure. FIG. 3 is a schematic diagram showing an example of an inductor. Fourth
The figure is a schematic diagram for explaining a conventional manufacturing method. 2, 3...Inductor, 2a...Parts, 4...
Lead wire, 5...Magnetic core, 16...Adhesive,
20...Ultraviolet light.

Claims (1)

[Claims] 1 While sequentially feeding multiple parts with a magnetic core passed through a roughly U-shaped lead wire up to just before the predetermined position, UV rays are applied to the lead wire at least near the predetermined position of the magnetic core for each part. Applying a hardening and anaerobic hardening adhesive in sequence, then pushing the magnetic core of each part into a predetermined position on the lead wire, and then sequentially irradiating the adhesive on each part with ultraviolet rays to cure it. A method for manufacturing an inductor characterized by: