JPH06236507A - Production of magnetic head core - Google Patents

Abstract

PURPOSE:To improve the productivity of the magnetic head core by superposing plural core blocks and forming magnetic gaps. CONSTITUTION:The surface formed with the gap forming material of the next core block 9 is pressed to a surface 13 on the side opposite to the surface formed with the gap forming material of the core block 9. The plural blocks are thereafter pressed successively against each other in the same manner. The I-shaped core block 15 is pressed to these blocks from the right side of the first core block 9 to respectively form the magnetic gaps. A block 18 joining the respective blocks 9 and the I-shaped core block 15 to each other is formed. The joined block 18 is cut in the direction perpendicular to these magnetic gaps to form an element block 19. The formed element block 19 is cut parallel with the magnetic gaps between the bottom 5 of the respective grooves 10 of the element block 19 and the surfaces on the opposite side of the respective grooves 10, by which the magnetic head cores are obtd. The man-hours for working are decreased and the productivity is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a magnetic head core of a magnetic head mounted on an external recording device such as a computer.

[0002]

2. Description of the Related Art In recent years, an external recording device for a computer has been developed in accordance with the demands of the market for light, thin, short and small devices, and a magnetic head and a recording medium, which are the keys of the external storage device, have been developed. Miniaturization is progressing.

A conventional method of manufacturing a magnetic head core will be described below with reference to the drawings. In FIG. 11, 1 is a C-shaped core block, 2 is a groove, and 3 is a surface which faces the gap. This groove 2 is ground with a molded grindstone,
The surface 3 serving as the gap facing surface is processed into a flat surface by lapping or the like. Reference numeral 4 is an I-shaped core block, and 5 is a surface that faces the gap. The surface 5 serving as the gap facing surface is processed into a flat surface by lapping or the like. 6 is a non-magnetic gap forming material.

The gap-forming material 6 is brought into contact with the gap-facing surface 3 of the C-shaped core block 1 and the gap-facing surface 5 of the I-shaped core block 4 via the gap-forming material 6. Dissolve C-shaped core blocks 1 and I
The letter-shaped core block 4 is joined. Next, as shown in FIG. 12, the core block 7 joined as shown in FIG. 12 is ground from above and below so that the depth A of the magnetic gap and the total height thereof become predetermined values.

With the required thickness of the core element 8 perpendicular to the magnetic gap of the core block 7, X- of the core block 7
The core block 7 is cut along the line X '. By cutting, the magnetic head core of the core element 8 shown in FIG. 13 is obtained.

[0006]

As described above, in the above-described conventional manufacturing method, the C-shaped core blocks 1 and the I-shaped core blocks 4 are machined in the same number, and the C-shaped core blocks 1 are formed in the same number. Since the I-shaped core blocks 4 are butted to form the core blocks 7, respectively,
There is a problem that man-hours are required for material management and processing, and productivity is reduced.

[0007]

In order to solve the above-mentioned problems, the present invention provides a gap forming material for a second core block on the surface opposite to the surface on which the gap forming material for the first core block is formed. The surface on which the gap forming material of the second core block is formed is in contact with the surface of the second core block opposite to the surface on which the gap forming material of the third core block is formed,
A plurality of core blocks are butted so that the surface of the fourth core block on which the gap forming material is formed is in contact with the surface of the third core block opposite to the surface on which the gap forming material is formed. A step of contacting an I-shaped core block made of the same material as the core block and having a length for a plurality of heads on the surface where the gap forming material is formed, and the I-shaped core block and the first core block. Indentation between the slope of the groove and the recess between the slope of the groove of the core block and the surface opposite to the surface where the gap forming material of each core block is formed, respectively, Arranging the plurality of core blocks and placing rod-shaped glass in the depressions, melting the glass and joining the core blocks to form a magnetic gap, and The element block is cut in the direction perpendicular to the magnetic gap to form the element block, and the element block is formed in parallel with the magnetic gap between the bottom of each groove of the element block and the opposite surface of each groove. There is a step of cutting.

[0008]

With this structure, since a plurality of core blocks are overlapped to form magnetic gaps, respectively, the number of processing steps can be reduced and the productivity can be improved.

[0009]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 9 is a core block made of ferrite having a length of a plurality of heads,
Reference numeral 10 is a groove that serves as a winding window, 11 is a surface that is a gap facing surface, and 12 is a side surface of the groove 10 that is a surface facing the gap 1
It is the slope between 1 and 1. The processing of the core block 9 will be described. The groove 10 and the slope 12 are processed and formed by a grindstone formed on a ground ferrite core block element, and the surface 11 to be the gap facing surface is processed into a flat surface by using a wet lapping machine or the like. The surface 13 on the opposite side of the surface 11 serving as the gap facing surface of the core block element is also processed into a flat surface similarly to the surface 11 serving as the gap facing surface. In this way, the plurality of core blocks 9 are formed.

Next, as shown in FIG. 2, a nonmagnetic gap forming material 14 is formed to a predetermined thickness on the surface 11 of each core block 9 which faces the gap by sputtering or the like. Next, in FIG. 3, 15 is an I-shaped core block made of ferrite having a length corresponding to a plurality of heads,
Reference numeral 16 is a surface that faces the gap. The surface 16 serving as the gap facing surface is processed into a flat surface like the surface 11 serving as the gap facing surface.

Next, as shown in FIG. 4, the gap forming material 1
4, the slopes 12 of the plurality of core blocks 9 are located on the lower side, and the gap of the second core block 9 is formed on the surface 13 of the first core block 9 opposite to the surface on which the gap forming material 14 is formed. A surface 11 serving as a gap facing surface on which the forming material 14 is formed contacts, and a gap of the third core block 9 is further formed on the surface 13 of the second core block 9 opposite to the surface on which the gap forming material 14 is formed. The surface 11 serving as the gap facing surface on which the material 14 is formed is in contact, and the gap forming material 14 of the fourth core block 9 is formed on the surface 13 of the third core block 9 opposite to the surface on which the gap forming material 14 is formed. The plurality of core blocks 9 are butted so that the surface 11 that is the gap-opposing surface in which is formed abuts. The surface 16 serving as the gap facing surface of the I-shaped core block 15 is brought into contact with the surface 11 serving as the gap facing surface on which the gap forming material 14 of the first core block 9 is formed.

A depression between the abutting I-shaped core block 15 and the slope 12 of the groove 10 of the core block 9 and the slope 12 of the groove 10 of the core block 9 with which the core blocks 9 are in contact with the core. Bar-shaped glass 17 is placed in the recesses between the blocks 9 and the opposite sides of the grooves 12. Each glass 17 is melt | dissolved and the some core block 9 and the I-shaped core block 15 are each joined. By joining, a plurality of core blocks 9 and I-shaped core blocks 1
Blocks 18 each having a magnetic gap between
Is formed.

Next, as shown in FIG. 5, the block 18 is ground from above and below so that the depth B of the magnetic gap and the entire height thereof become predetermined values. Further, each of the blocks 18 is cut along the line XX ′ shown in FIG. 5 in the direction perpendicular to the magnetic gap of the block 18 so as to have a required thickness. By cutting the block 18, the element block 19 is formed as shown in FIG. 7 is obtained by cutting the element block 19 along the line YY ′ shown in FIG. 6 parallel to the magnetic gap between the bottom of each groove 10 of the formed element block 19 and the surface on the opposite side of the groove 10. The magnetic head core 20 shown in is formed.

As described above, according to the first embodiment, the gap forming material 14 of the next core block 9 is formed on the surface 13 of the core block 9 opposite to the surface on which the gap forming material 14 is formed.
The surfaces on which the gap forming material 14 is formed are brought into contact with each other, and a plurality of core blocks 9 are abutted one after another in the same manner. A block 18 is formed by abutting against each other to form a magnetic gap and joining the core block 9 and the I-shaped core block 15 together.
The element block 19 is formed by cutting the joined block 18 in the direction perpendicular to the magnetic gap, and the bottom of each groove 10 of the formed element block 19 and the opposite surface of each groove 10 are formed. The element block 19 is cut in parallel with the magnetic gap to obtain the magnetic head core 20.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. The present embodiment is an example in which the core of the winding portion is thickened and the core of the magnetic gap portion is thinned in order to have strength of the winding portion of the magnetic head core. The element block 19 formed by cutting the block 18 in the processing step shown in FIG.
Since the same processing as that of the first embodiment is performed up to the step in which is formed, the description thereof will be omitted, and the subsequent steps will be described below.

As shown in FIG. 8, the prepared jig 21 is coated with the adhesive 22, and the coated jig 21 is covered with the element block 1
The side surface is attached with the magnetic gap side of 9 facing upward. Next, the gap side surface 23 of the magnetic gap portion of the element block 19
Is ground to thin the core of the magnetic gap. The element block is indicated by a line YY 'shown in FIG. 8 which is parallel to the magnetic gap between the bottom of each groove 10 of the element block 19 in which the core of the magnetic gap portion is formed thin and the surface on the opposite side of the groove 10. The magnetic head core 24 shown in FIG.
To form.

As described above, according to the second embodiment, since the core of the winding portion of the magnetic head core 24 is formed thick, the core strength is increased as a whole, and the strength of the thinned portion of the magnetic gap portion is high. It is possible to manufacture the magnetic head core 24 which is set to be thin so that the magnetic head core 24 is not destroyed.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings. In this embodiment, when the winding core of the magnetic head core is thickened and the core of the magnetic gap is thinned, the core of the magnetic head is stuck to a jig in the state of a block, and the state is processed until completion. Here is an example.
In the processing steps shown in FIG. 5 of Example 1 described above, the steps up to the step of grinding from the top and bottom so that the depth B of the magnetic gap of the block 18 and the overall height thereof have predetermined values are the same as those of the example. Since the same processing as that of No. 1 is performed, the description thereof will be omitted, and subsequent steps will be described below.

As shown in FIG. 10, the prepared jig 25 is coated with the adhesive 26, and the coated jig 25 is covered with the block 18.
Stick the underside of the other side of the magnetic gap. Next, a plurality of grooves 27 are formed in a direction perpendicular to the magnetic gap of the block 18 with a diamond blade having a plurality of blades. Next, the block 18 is cut along the dotted lines 28 of the plurality of grooves 27 of the block 18. When the element block 29 is cut along the dotted line 30 parallel to the magnetic gap between the bottom of each groove 10 of the cut element block 29 and the surface on the opposite side of the groove 10, the winding portion of the magnetic head core 24 described above is cut. It is possible to obtain a shape in which the core is thick and the core of the magnetic gap portion is thin.

As described above, according to the third embodiment, the magnetic head core 2 with the block 18 attached to the jig 25 is used.
Since it is processed until the completion of 4, the sticking process can be reduced and the productivity can be improved.

[0021]

As described above, according to the present invention, the surface of the next core block on which the gap forming material is formed is brought into contact with the surface of the core block opposite to the surface on which the gap forming material is formed. And a plurality of core blocks are abutted against each other, and the surface of the first core block on which the gap forming material is formed is brought into contact with the surface of the I-shaped core block that faces the gap to form a magnetic gap, and A block joined to the V-shaped core block is formed, and the joined block is cut in a direction perpendicular to the magnetic gap to form an element block. The bottom of each groove of the formed element block and the opposite of each groove The magnetic head core is obtained by cutting the element block parallel to the magnetic gap between the side surface and the side surface. Can, there is provided a method of manufacturing a magnetic head core with improved productivity.

[Brief description of drawings]

FIG. 1 is a perspective view showing processing of a method of manufacturing a magnetic head core according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the processing of the method of manufacturing the magnetic head core according to the first embodiment of the invention.

FIG. 3 is a perspective view showing the processing of the method of manufacturing the magnetic head core according to the first embodiment of the invention.

FIG. 4 is a perspective view showing the processing of the method of manufacturing the magnetic head core according to the first embodiment of the invention.

FIG. 5 is a perspective view showing processing of the method of manufacturing the magnetic head core according to the first embodiment of the invention.

FIG. 6 is a perspective view showing processing of the method of manufacturing the magnetic head core according to the first embodiment of the invention.

FIG. 7 is a perspective view showing processing of the method of manufacturing the magnetic head core according to the first embodiment of the invention.

FIG. 8 is a perspective view showing processing of a method of manufacturing a magnetic head core according to a second embodiment of the present invention.

FIG. 9 is a perspective view showing the processing of the method of manufacturing the magnetic head core in the second embodiment of the invention.

FIG. 10 is a perspective view showing processing of a method of manufacturing a magnetic head core according to a third embodiment of the present invention.

FIG. 11 is a perspective view showing processing in a method of manufacturing a magnetic head core of a conventional example.

FIG. 12 is a perspective view showing a process of a conventional method of manufacturing a magnetic head core.

FIG. 13 is a perspective view showing processing in a method of manufacturing a magnetic head core of a conventional example.

[Explanation of symbols]

 9 core block 10 groove 11 surface which becomes a gap facing surface 12 slope 13 surface 14 gap forming material 15 I-shaped core block 16 surface which becomes a gap facing surface 17 glass 18 block 19 element block 20 magnetic head core 21 jig 22 adhesive 23 gap Side surface 24 Magnetic head core 25 Jig 26 Adhesive 27 Groove 28 Dotted line 29 Element block 30 Dotted line

Claims (3)

[Claims] 1. A core block body made of ferrite and having a length corresponding to a plurality of heads is provided with a groove serving as a winding window on a surface serving as a gap facing surface, and a side surface portion of the groove and a gap facing surface. Forming a plurality of core blocks having slopes between the core blocks, and forming a gap forming material on the gap facing surfaces of the core blocks. The surface of the second core block on which the gap forming material is formed contacts the surface on the side opposite to the surface on which the forming material is formed, and the surface of the second core block on the opposite side of the surface on which the gap forming material is formed. , The surface of the third core block on which the gap forming material is formed is abutted,
A plurality of core blocks are butted so that the surface of the fourth core block on which the gap forming material is formed is in contact with the surface of the third core block opposite to the surface on which the gap forming material is formed. A step of abutting an I-shaped core block made of the same material as the core block and having a length corresponding to a plurality of heads on the surface of the core block on which the gap forming material is formed; The depression between the slope of the groove of the core block and the depression between the slope of the groove of the core block and the surface of the core block opposite to the surface on which the gap forming material is formed are on the lower side. In this way, the plurality of core blocks are arranged, rod-shaped glasses are placed in the depressions, the glasses are melted, and the core blocks are joined to form a magnetic gap. And a step of cutting the bonded block in a direction perpendicular to the magnetic gap to form an element block, and a magnetic gap between the bottom of each groove of the element block and the opposite surface of each groove. A method of manufacturing a magnetic head core, comprising the step of cutting the element block in parallel with. 2. A thin element core cut in a direction perpendicular to the magnetic gap is attached to a jig, and the core surface of the magnetic gap portion of the element block is ground to reduce the thickness of the core of the magnetic gap portion. The method of manufacturing a magnetic head core according to claim 1, further comprising a forming step. 3. A step of forming a plurality of grooves in a direction perpendicular to the magnetic gap after melting the glass to bond the core blocks to each other to form a magnetic gap, and along the plurality of grooves. 2. The method of manufacturing a magnetic head core according to claim 1, further comprising the step of cutting each block.