JPH0157407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a magnetic head, and more particularly to a method of manufacturing a magnetic head that can improve productivity.

The structure of a conventional magnetic head and its manufacturing method will be explained with reference to FIG. 1 has gap 1 in 2 places
A is a processed front core, and 2 is a rear core formed in an E-shape into which a coil hobbin 5 having a coil 3 wound therein and provided with a terminal 4 can be inserted. 6 is a front plate which is a magnetic tape sliding part. Reference numeral 7 denotes a hold case with one side open, which houses the front core 1, the rear core 2 to which the coil hobbin 5 is attached, and the front plate 6.

The conventional method for manufacturing a magnetic head involves forming a joint surface 1b of the front core 1 with the rear core 2 (or a joint surface of the rear core 2 with the front core 1) and a joint surface of the front plate 6 with the lower surface of the front core 1. After applying an adhesive made of, for example, synthetic resin by hand with a brush to the joint surface 6a (or the joint surface of the front core 1 with the front plate 6), the front core 1 is
The rear core 2, the front core 1, and the front plate 6 are joined together using an adhesive applied to each joint surface, and the front core 1, the rear core 2, and the front plate 6 are integrated into a hold case 7. be.

However, in the conventional magnetic head manufacturing method described above, the joint surface of the front core 1 and the rear core 2 and the front core 1
Since the adhesive is applied by hand to the joining surfaces of the front panel 6 and the front panel 6, unevenness may occur in the application of the adhesive, the adhesive may overflow from the joining surfaces, and there may be insufficient adhesive on the joining surfaces, resulting in poor adhesive strength. This results in variations in the manufacturing accuracy of the magnetic head, that is, in quality. Furthermore, applying adhesive to each joint surface by hand significantly reduces the number of steps required to assemble the magnetic head, which hinders improvements in the productivity of the magnetic head.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a magnetic head that eliminates the drawbacks of the prior art described above, makes the quality of the magnetic head uniform, and improves productivity.

To achieve this object, the present invention provides a method for manufacturing a magnetic head in which a front core and a rear core are bonded together using an adhesive, in which adhesive is applied to at least one of the joint surfaces of the front core and the rear core. The front core and the rear core are bonded by pressing and heating at the bonding surfaces.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. In the figure, the same reference numerals as in FIG. 1 indicate the same or equivalent parts.

First, as shown in FIGS. 2 and 3, the joint surface 1b of the front core 1 with the rear core 2 and the joint surface 6a of the front plate 6 with the front core 1 face upward, and are aligned and cured. After arranging them in the tools 8 and 9, they are set in a printing machine 10 shown in FIG. 4, and the adhesive is printed. (FIG. 4 shows the alignment jig 9 for the front plate 6 set in the printing machine 10). and,
In order to maintain the viscosity of the printed adhesive, the front core 1 and the front plate 6 are low-temperature dried at room temperature (20° C.) for about 3 hours, for example. Next, the front core 1,
The rear core 2 and front plate 6 are connected using a joining jig (not shown)
1 to 1.5 on each joint surface.
150℃~200℃ while crimping with a pressure of about Kg/ ^cm2
Perform high temperature drying (heating) for 1 to 1.5 hours at
This hardens the adhesive and fixes the front core 1 to the rear core 2 and front plate 6. Through the above steps, the front core 1, rear core 2, and front plate 6 are integrated, and this is assembled into the hold case 7 to assemble the magnetic head.

Therefore, the magnetic head manufactured as described above is
When joining the front core 1 and the rear core 2 and the front core 1 and the front plate 6, adhesive was printed on each joint surface using a printing machine, so the amount of adhesive applied on each joint surface was uniform, and the magnetic The manufacturing precision of the head is improved and there is no variation in quality. Further, since a large number of adhesives can be printed on the front core 1 and the front plate 6 at one time, the number of steps required to assemble the magnetic head is significantly reduced, and the productivity of the magnetic head can be improved.

5 shows another embodiment of the present invention, in which the front core 1 of the rear core 2 is replaced with the front core 1.
The state shown is that they are aligned on the alignment jig 11 with the joint surface 2a facing upward. Then, this is set in the printing machine 10 shown in FIG. 4, adhesive is printed on the joining surface 2a of the rear core 2, and the front core 1 and the rear core 2 are joined by low temperature drying and pressure drying at high temperature. It's okay. Similarly, instead of the front plate 6, adhesive may be printed on the joint surface of the front core 1 with the front plate 6, or even if adhesive is printed on both sides of each joint surface, the present invention will still be the same. be effective.

Furthermore, the present invention requires adhesive printing and pressure-bonding high-temperature drying (heating) only for joining the front core 1 and the rear core 2.
Even if this is done, the above-mentioned effects can be sufficiently achieved.

As explained above, according to the present invention, in the method for manufacturing a magnetic head in which a front core and a rear core are bonded together with an adhesive, an adhesive is applied to at least one of the bonding surfaces of the front core and the rear core. Since the front core and the rear core are printed and bonded by pressing and heating on the joint surface, the amount of adhesive applied on the joint surface is uniform, the quality of the magnetic head is stabilized, and the number of man-hours for assembling the magnetic head is significantly reduced. This has the effect of reducing the amount of water and improving productivity.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a magnetic head, FIG. 2 is a perspective view showing an embodiment of a front core alignment jig according to the present invention, and FIG. 3 is a front plate alignment jig according to the present invention. FIG. 4 is a perspective view showing an embodiment of a printing machine according to the present invention; FIG. 5 is a perspective view showing a rear core alignment jig according to another embodiment of the present invention. It is. 1... Front core, 1b... Joint surface of front core, 2...
Rear core, 6...front plate, 6a...joint surface of front plate,
10...Printing machine.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a magnetic head in which a front core and a rear core are bonded with an adhesive, including printing an adhesive on at least one of the joint surfaces of the front core and the rear core. . A method of manufacturing a magnetic head, characterized in that the front core and the rear core are bonded by pressing and heating at the joining surfaces. 2. Claims characterized in that an adhesive is printed on at least one of the joining surfaces of the front core and the front plate, and the front core and the front plate are joined by pressing and heating at the joining surfaces. 2. A method for manufacturing a magnetic head according to item 1.