JPH01220104A - Manufacture of magnetic head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a method for manufacturing a magnetic head in which a magnetic head main body is housed in a shield case, with the purpose of increasing the productivity of the magnetic head by facilitating the injection of filling resin. To magnetic with surface finishing allowance.

A magnetic head main body portion and a shield case having a trapezoidal protrusion in which the finishing allowance portion is accommodated are made, and the shield case is attached to the magnetic head main body portion so that the finishing allowance portion is accommodated in the protrusion. After injecting and solidifying a resin between the magnetic head main body and the shield case, the protrusion of the shield case, the finishing allowance of the magnetic head main body, and the resin filled in between are injected and solidified. The structure is such that a part of it is removed.

[Industrial application field]

The present invention relates to a method for manufacturing a magnetic head, particularly in a magnetic head having a structure in which the main body of the magnetic head is housed in a shield case, which facilitates the filling of resin between the shield case and the main body of the magnetic head, thereby increasing the productivity of the magnetic head. Concerning improving improvements.

[Conventional technology]

FIG. 2 is a cross-sectional view showing an example of the configuration of a conventional magnetic head. The magnetic head 1 has a read/write surface 2 formed into a cylindrical surface. 5, and a resin 6 is injected between the magnetic head main body 3, the mold body 4, and the shield case 5, and a sealing resin 7 for injecting the resin 6;
The resin 8 is required to prevent the resin 7 from forming a recess on the read/write surface 2.

3 is a sectional view of the shield case shown in FIG. 2, and FIG. 4 is a side view of the magnetic head main body shown in FIG. 2.

In FIG. 3, a through hole 9 where the read/write surface 2 is exposed.
The shield case 5, which is generally made of metal, is formed by pressing a metal plate to form the overall shape, drilling a through hole 9, and then punching it.

In FIG. 4, each magnetic head main body 3 includes a plurality of magnetic cores 10.11 and a plurality of coils 12.13, and a bobbin 14.15 around which the coil 12.13 is wound has a coil 1.
Terminals 16 and 17 for connecting the windings 2 and 13 to the outside protrude.

FIG. 5(a)l(0)l(II) is an explanatory diagram of the main process of filling resin into the magnetic head shown in FIG.
After mounting the magnetic head main body part 3 on the molded body 4 and covering it with the shield case 5, the sealing resin 7 that prevents the resin 6 from flowing out from the through hole 9 is formed using a resin with relatively high viscosity. do.

Next, a resin 8 is injected and solidified to fill the gap between the magnetic head main body 3 and the through hole 9, and then resin 6 is injected and solidified so that the through hole 9 faces downward. 3 and the unnecessary portions of the resin 8 are removed by mechanical processing means to expose the read/write surface 2 shown by the two-dot chain line in FIG. 5(c), thereby completing the magnetic head 1.

[Problem to be solved by the invention]

As explained above, the conventional magnetic head 1 requires the sealing resin 7 to be filled with the resin 6, and the resin 8 is required to prevent the sealing resin 7 from forming a recess on the read/write surface 2. is required, and resin 6. 7. 8 will be formed by repeating injection and solidification for each. Therefore, there was a problem in that the productivity of the magnetic head was impaired.

The present invention is to improve the productivity of magnetic heads by facilitating the injection of filler resin.

[Means to solve the problem]

According to FIG. 1, the method of the present invention for the above purpose includes accommodating the magnetic head main body 3 in a shield case 21, filling the space between the magnetic head main body 3 and the shield case 21 with resin 6, and 3's read/write surface 2 is metal case 2
1, a magnetic head main body 3 having a finishing allowance for the read/write surface 2 and a shield case 21 having a trapezoidal protrusion 22 in which the finishing allowance is accommodated are prepared; The shield case 21 is placed over the magnetic head main body 3 so that the finishing allowance is accommodated in the protrusion 22, and the resin 6 is injected between the magnetic head main body 3 and the shield case 21 and solidified, and then the shield case is removed. This method of manufacturing a magnetic head is characterized in that the protrusions 22 of 21, the finishing margin of the magnetic head main body 3, and a portion of the resin 6 filled in between are removed.

[Operation] According to the above means, a trapezoidal protrusion is formed in the shield case in place of the conventional through hole exposed on the read/write surface, and after filling resin is injected, the glue/write surface of the magnetic head body is finished. By removing the replacement part and the trapezoidal protrusion in the same process and making the read/write surface exposed from the shield case, the conventional sealing resin forming process and the resin filling the recess of the sealing resin can be formed. This eliminates the need for a manufacturing process, simplifies the manufacturing process of the magnetic head, and improves productivity.

〔Example〕

Examples of the method of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram for explaining one embodiment of the method of the present invention. However, the same reference numerals are used for parts common to those in the previous figure.

FIG. 1(A)l(II) is a plan view of the shield case and its A-A sectional view. The shield case 21, which is formed by stamping a metal plate and then punching, has an open bottom surface and a top surface. A trapezoidal protrusion 22 is provided to accommodate the finishing allowance for the read/write surface of the magnetic head main body.

As shown in FIG. 1(C), the magnetic head main body 3, which has a finishing allowance for the read/write surfaces, is mounted on a molded body 4 and covered with a shield case 21.

Next, as shown in FIG. 1 (=), the shield case 21
When the resin 6 is injected into the trapezoidal protrusion 22 of the shield case 21 and the outside of the magnetic head body 3, a portion of the resin 6 fills and solidifies to cover the mold body 4. be done. Therefore, the finishing allowance for the read/write surface of the magnetic head main body 3 and the shield case 21 are
When the trapezoidal protrusion 22 and a part of the resin 6 filled between them are removed, a read/write surface 2 shown by a two-dot chain line in the figure is exposed, and the magnetic head has the same configuration as the conventional magnetic head 1. The head is completed.

〔Effect of the invention〕

The conventional method required the process of injecting and solidifying the resin three times, but the method of the present invention requires only one process of injecting and solidifying the resin, simplifying the manufacturing process of the magnetic head and improving productivity. In addition, the molding process of the shield case using a press machine is reduced from the conventional three steps to two steps, which has the effect of simplifying the process.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining an embodiment of the method of the present invention, FIG. 2 is a cross-sectional view showing an example of the configuration of a conventional magnetic head, and FIG. 3 is a cross-sectional view of the shield case shown in FIG. 4 is a side view of the magnetic head main body shown in FIG. 2, and FIG. 5 is an explanatory diagram of the main steps of filling a conventional magnetic head with resin. In the figure, 2 is a read/write surface, 3 is a magnetic head main body, 6 is a resin, 21 is a shield case, and 22 is a trapezoidal protrusion. 42,
Kim Zen Akira method n-prize threat/h to explain the cup ~ concave conventional /) Tsuchiki hetsuto /) structure 2 show town face concave 2nd flash case /) l! 97 side view Body egg/) Side view Figure 3 Figure 4 (a) (mouth 2
Figure 4: R) Field for removing BF during the support rod process where 8 logs of I are filled into the defrosting N11 air head.

Claims (1)

[Claims] The magnetic head main body (3) is housed in a shield case (21), and the magnetic head main body (3) and the shield case (21) are housed in a shield case (21).
A resin (6) is filled between the metal case (21) and the read/write surface (2) of the magnetic head main body (3).
), the magnetic head has a magnetic head main body (3) having a finishing allowance for the read/write surface (2), and a shield case (22) formed with a trapezoidal protrusion (22) in which the finishing allowance is accommodated. 21), and placing the shield case (21) over the magnetic head main body (3) so that the finishing allowance is accommodated in the protrusion (22); and the shield case (21)
After injecting and solidifying the resin (6) between the shield case (21) and the finishing allowance of the magnetic head main body (3), the resin ( 6) A method for manufacturing a magnetic head, characterized in that a portion of the magnetic head is removed.