JPH01103255A - Surface polishing for flexible disc - Google Patents

Abstract

PURPOSE:To make the surface of a disc uniform easily by polishing the surface of the disc by a laminar block laid along the revolution direction of a flexible disc and by a polishing head having a shape which is obtained by connecting a plurality of blocks by the surface perpendicular to the revolution direction. CONSTITUTION:The both surfaces of a flexible disc 2 in revolution in a revolution drive system 3 are polishing-worked by a polishing head 1. In this case, the surface of the flexible disc 2 which is roughly polished is made smooth by the ridge of a laminar block laid along the revolution direction of the disc 2 and further by the edge surface connected by the surface perpendicular to the revolution of direction. Therefore, the surface of the disc 2 can be made uniform easily by using the polishing head 1.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a surface polishing method for uniformizing the surface roughness of a flexible disk in order to improve the quality of the flexible disk.

<Prior Art> A variable factor in the track signal quality of a flexible disk is the uneven roughness of the coated surface of the flexible disk, and in order to adjust this, a surface polishing method using a polishing tape or the like is employed. However, variations in the surface roughness of abrasive tapes occur on the inner and outer peripheries due to manufacturing process issues and problems with the form of the product wound into a reel, and uniformity is required. However, no effective solution has been found.

<Problems to be Solved by the Invention> Conventionally, uneven roughness on the surface of this type of flexible disk has been an unavoidable problem with coated flexible disks, and the solution to this problem has been to improve the dispersibility of magnetic paint. Measures have been taken to improve the particle size of the applied paint, and some effectiveness has been confirmed.

However, in recent years.

Efforts are being made to increase the capacity of flexible disks,
In addition, as high durability is required, reducing the uneven roughness of the flexible disk surface has become an increasingly important item, and it is necessary to further improve the surface quality achieved by the conventional tape polishing method. sex arose.

<Means for Solving the Problem> According to the present invention, the surface of a flexible disk that has been polished one or more times by other means such as a tape polishing method is bonded together along the rotational direction of the disk using a layered block. In addition, a method for polishing the surface of flexible disks using a polishing head with a shape in which multiple blocks are connected by a surface perpendicular to the direction of rotation was obtained.

Effect> The surface of a flexible disk polished by other means such as tape polishing is smoothed by ridges of material glued together along the direction in which the head runs, and by end faces connected at right angles to the direction of rotation. By doing so, a better surface can be obtained than before.

<Example> An example of the present invention will be described below with reference to the drawings.

An embodiment of the present invention is a polishing head 1 having a shape in which a plurality of blocks are connected along a plane perpendicular to the rotation direction, and is a layered block laminated along the rotation direction of a flexible disk as shown in FIG. It was carried out using

FIG. 2 shows a side view of a polishing apparatus for polishing a flexible disk 2 having a metal center core 4 using the polishing head 1 shown in FIG. The flexible disk 2 to be polished is supported at its center by a dedicated metal core or other means, and is rotated by a two-rotation drive system 3. The polishing head 1 was applied to the surface of the flexible disk 2 from both sides or one side. When the surface roughness change and output when applied to the surface from both sides were measured using a non-contact surface roughness meter and a digital output measuring device, the surface roughness Ra and output as shown in Table 1 were obtained. .

Table 1 Ra Variation in Ra Standardized output Before polishing 0.015 μm ±0.00.2 After 100 polishing 0.014 μm ±0.001 or less 1
10%0.013μm ±0.001 or less 116
For comparison purposes, a similar study was conducted on polishing with a polishing tape, and the surface roughness Ra was as shown in Table 2.

I got the output.

Table 2 Ra Variation in Ra Normalized output before polishing
0.015μm ±0.002 After 100% polishing 0.014μm :l:o, 002 106%
0.013μm ±0.002 Section 118 From the above results, it can be seen that when polishing with a polishing tape, variations in surface roughness are observed due to the original surface properties of the coated material, but with a polishing head, variations in surface roughness can be improved. I can ask questions. Furthermore, in terms of standardized output, the performance was comparable to that of polishing tape, and the product quality of the polishing head was recognized to be superior in terms of productivity.

<Effects of the Invention> As described above, according to the present invention, a polishing head is used for polishing the surface of a flexible disk.

The surface can be easily homogenized with good productivity.

Margin below

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a polishing head used in the present invention, with the surface in contact with the flexible disk surface facing upward, and FIG. 2 is a side view of a polishing apparatus to which the polishing head is attached. 1: Head for polishing, 1a: Herad core for polishing. 1 al, 1 a#: Head core section - 2: Flexible disk, 3: Rotary drive system, 4: Two metal center cores. 1i1 Figure 2 Figure 4...Metal center core

Claims (1)

[Claims] 1. A layered block made by laminating the surface of a flexible disk that has been polished by other means at least once along the rotational direction of the disk, and has a shape in which multiple blocks are connected by a plane perpendicular to the rotational direction. A flexible disk surface polishing method in which the surface is polished using a polishing head.