JPS63251911A - Manufacture of floppy head - Google Patents

Abstract

PURPOSE:To sharply reduce the man-hour required for manufacturing a floppy head, by forming the front magnetic core as a laminated body, in which front magnetic cores are arranged at intervals from the leg section of the body, and sliders as another laminated bodies, in which sliders are arranged through the leg sections having a T-shaped cross section of the bodies, and joining the front magnetic core with the sliders. CONSTITUTION:The front magnetic core of this floppy disk is formed in the form of a laminated body 112, in which front magnetic cores are arranged at intervals from the leg section of the body, and sliders are formed in forms of another laminated bodies 113 and 114, in which sliders are arranged at intervals from the leg sections of the bodies having a T-shaped cross section. After the front magnetic core laminated body 112 is joined with the slider laminated bodies 113 and 114, the joined body is cut into pieces and individual front head bodies 115 are obtained. Since numerous pieces of front head bodies are obtained by one time of jointing process in such way, the man-hour required for manufacturing the floppy head can be reduced sharply.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for manufacturing a magnetic head (hereinafter referred to as a floppy head) used in a floppy disk drive device, and in particular, it significantly reduces the number of manufacturing steps for bulk type floppy heads. Regarding the manufacturing method that can reduce the

[Conventional technology]

It has been known that a floppy head has a structure having a plurality of operating gaps, which complicates the manufacturing process and requires a large number of manufacturing steps.

For example, in the conventional method of manufacturing a floppy head, as shown in the schematic diagram of a manufacturing process example of a conventional bulk type floppy head in FIG.
Grooving of the track width regulating groove and coil mounting leg groove and polishing of the gap forming surface (not shown) are performed as shown in FIG. 2 (fat).

Next, the grooves of the ferrite pars 201 and 202 are aligned as shown in FIG. 2 (bl), and then glass bonded.

The two sets of glass-bonded bodies 203 and 204 are joined via a spacer 205 as shown in Fig. 2 fcl, cut and polished to a predetermined track width, and the lower part is cut to form the final product as shown in Fig. 2 + dl. Obtain the front magnetic core 208 as shown in FIG.

Next, a slider 212.2 has a substantially L-shaped cross section on both sides of the front magnetic core 208 and has an air groove 214 on one side.
13 is joined to form the front head body 21 as shown in Fig. 2.
Get 8.

After applying processing such as predetermined polishing to the front head body, the winding coil 209 is attached, and then the rear magnetic core 2 is attached.
Floppy head 2 like the one shown in Figure 2)
20 is obtained.

[Problem that the invention seeks to solve]

Conventional floppy head manufacturing methods have the following problems.

First, the lower part is discarded due to the foot cutting process that is done in the steps shown from [cl to fdl in Figure 2].This not only reduces the yield of ferrite material, but also requires the same processing as the upper part. There is also a problem that the man-hour yield of the machining process performed with high precision is reduced.

Second, because the front magnetic core 208 shown in FIG. 2 (dl) is handled in the next process with only the upper part of the core joined, damage such as broken legs of the core occurs frequently, resulting in lower yield. There are problems that are causing a decline in

Thirdly, as shown in FIG. 2 (di), the method of individually joining the sliders 212 and 213 to the front magnetic core 208 requires a significant increase in man-hours, and furthermore, it is difficult to determine the joining position when joining. There is a problem in that the variation increases the number of man-hours in the process of setting the gap depth.

An object of the present invention is to provide a manufacturing method using a new slider structure that can solve the above problems and significantly reduce the number of man-hours.

[Means for solving problems]

The present invention provides a front magnetic core 208 and a slider 21 formed by predetermined processing such as joining, cutting, and polishing two pairs of ferrite bars that have been subjected to groove forming processing and polishing processing.
2, 216 to obtain a front magnetic head body 218, the front magnetic core 208 is formed into a front magnetic core laminate 112 arranged in multiple layers through its legs, and The sliders 212 and 216 are formed into slider laminates 113 and 114 arranged in multiple layers through legs having a substantially T-shaped cross section, and the front magnetic core laminate 112 and the slider laminates 113 and 114 are joined. This method of manufacturing a floppy head is characterized in that the front head body 115 is obtained by individually cutting the front head body 115 later.

[Effect]

The slider having a new structure according to the present invention enables a manufacturing method in which a large number of front head bodies can be obtained in one joining process due to its laminated structure.

〔Example〕

Embodiments of the present invention will be described below with reference to FIG. 1, which is a schematic diagram of an example of the manufacturing process of a floppy head according to the present invention.

Flat ferrite par 101 and track width regulation groove 10
6 and a ferrite par 102 provided with a large number of grooves 104 for accommodating winding coils are bonded by glass bonding on polished butt surfaces to form a bonded body as shown in FIG. 1 fat and FIG. 105 is obtained.Similarly, ferrite pars 106 and 107 are joined to form the joined body 1 of Fig. 2 Fbl.
Get 08.

Next, the above-mentioned joined bodies 105 and 108 are joined together to form a composite joined body 109 in which a winding coil is attached to a groove 110 on the circumference of the body.
After providing the magnetic core 111, it is cut to a predetermined track width and polished to obtain a front magnetic core laminate 112 as shown in FIG. 1(C).

Grooves are formed on both sides of the front magnetic core laminate 112 to form approximately T.
Slider laminates 113 and 114, which have a letter-shaped cross section and are arranged in multiple layers with the same interlayer distance as the front magnetic core laminate 112 through the lower ends of their legs, are arranged so that the surfaces that contact the medium are one surface of each other. and are joined so that the central leg 120 of the front magnetic core laminate and the leg 121 of the slider laminate are aligned, and the lower end of the leg of both laminates is in contact with the medium. Each layer is individually cut at the cutting plane 160 to obtain the front head body 115. [(C) and (d)] This front magnetic core body 115 is subjected to predetermined processing, that is, polishing that also serves to set the gap depth with respect to the medium contact surface, and air groove processing to improve the contact state of the medium. After adding polishing and crown polishing, the legs 117.
Attach the coil 118 to the rear magnetic core 122
A floppy head is obtained by fitting and joining.

A sectional view of the floppy head thus obtained is shown in Fig. 1).

In this embodiment, in the examples shown in FIG. 1, the number of layers in the laminate is three, but in the present invention, the number of layers is generally 20 to 30. This is an embodiment.

〔Effect of the invention〕

The manufacturing method using the laminate according to the present invention is a manufacturing method that allows a large number of front head bodies to be obtained in one joining process, so the number of man-hours is significantly reduced compared to that of the conventional joining process. It is also effective in reducing the yield of ferrite materials and preventing damage due to handling, which have been problems in the past, and is highly effective in improving productivity and reducing costs of floppy heads.

FIG. 2 is a schematic diagram showing an example of the manufacturing process of a floppy head.

101.102.201.202... Ferrite bar, 112... Front magnetic core laminate, 116.11
4...Slider laminate, 117.119.12
0...Front magnetic core leg, 121...Slider leg, 115...Front head body.

Figure 1 121 legs Figure 1 (e) (f) Figure 2

Claims (1)

[Claims] A method for manufacturing a floppy head in which a front head body is obtained by joining a slider to a front magnetic core formed by joining, cutting, and polishing two pairs of ferrite bars that have been subjected to a groove forming process and a polishing process. A front magnetic core laminate in which front magnetic cores are arranged in multiple layers via their leg portions, and a slider laminate in which the slider is arranged in multiple layers via leg portions having an approximately T-shaped cross section. . A method of manufacturing a floppy head, characterized in that the front magnetic core laminate and the slider laminate are joined together and then cut and polished to obtain individual front head bodies.