JPS63318255A - Magnetic disk grinding apparatus - Google Patents

Abstract

PURPOSE:To dispense with an operation for flattening previously a lapping tape to simplify the operational process and reduce working cost by disposing a grinding wheel between a tape pressing means and a supply reel to press the grinding wheel against a lapping grain surface. CONSTITUTION:A magnetic disk 1 is held by a chuck 2a and a rotary shaft 2 is rotated. And when gas (for example air) is supplied from a gas supply source to a gas jet nozzle 4, a lapping tape 3 is pressed against the magnetic disk 1 by air jetted from the nozzle 4 so that the upper surface of said disk 1 is polished along with the rotation of magnetic disk 1. During or after this polishing, a take-up reel 6 is rotated by a drive mechanism so that a portion of a new lapping tape 3 is supplied from a supply reel 5 to a grinding wheel 7 and fine projections on the grain surface 3a of the tape 3 are crushed or ground to provide a flat surface. Also, the portion of lapping tape 3 flattened by the grinding wheel 7 is supplied to the section of nozzle 4 to be taken up by the reel 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk polishing device for uniformly polishing the surface of a magnetic disk by bringing a lapping tape into pressure contact with the surface of the magnetic disk.

[Prior Art] Conventionally, as a magnetic disk polishing apparatus using a lapping tape, there have been disclosed 1, for example, JP-A-59-110546, JP-A-60-106028, and JP-A-61-13676.
The one shown in Publication No. 4 is known.

These devices include a drive mechanism that supports and rotates a magnetic disk, a tape pressure contact means that presses a wrapping tape against the surface of the magnetic disk, and a tape pressure contact means that winds the wrapping tape and applies the wrapping tape to the tape pressure contact means. It includes a supply reel for supplying the wrapping tape and a take-up reel for winding up the wrapping tape supplied to the tape pressure contacting means.

By the way, since there are minute protrusions on the abrasive grain surface of the lapping tape, the abrasive grain surface of the lapping tape must be flattened using a grindstone before being set in the above-mentioned magnetic disk polishing device. It is carried out.

[Problems to be Solved by the Invention] The above-mentioned prior art requires the work of flattening the wrapping tape in the previous step, which increases the number of work steps and increases the processing cost.

An object of the present invention is to provide a magnetic disk polishing apparatus that can simplify the working process.

[Means for Solving the Problems] The problems of the prior art described above are solved by disposing a grindstone between the tape pressure contact means and the supply reel so as to be in pressure contact with the abrasive grain surface of the lapping tape.

[Function] Before the wrapping tape is supplied to the tape pressure welding means,
The abrasive grain surface of the lapping tape is automatically flattened by a grindstone. Therefore, there is no need to flatten the wrapping tape in advance, and the number of work steps is reduced.

[Example] An example of the present invention will be described below with reference to FIGS. 1 and 2. The magnetic disk 1 is held by a chuck 2a provided at the tip of a rotating shaft 2, and the rotating shaft 2 is rotationally driven by a drive mechanism (not shown) to rotate at high speed.

- The lapping tape 3 for polishing the surface of the magnetic disk 1 is brought into pressure contact with the surface of the magnetic disk 1 by a gas such as air blown out by a nozzle 4. The wrapping tape 3 is wound around a supply reel 5, and the gas is blown through a nozzle 4 and the magnetic disk 1.
It passes through the gap ' and is wound onto the take-up reel 6.

For front gas blowing, between the nozzle 4 and the supply reel 5,
A grindstone 7 made of ceramic or the like is disposed opposite the abrasive surface 3a of the lapping tape 3, and the lapping tape 3 is pressed against the grindstone 7 by a roller 8. Note that 9 to 12 in the figure indicate guide rollers.

Next, the effect will be explained. The FIi disk 1 is held by a chuck 2a, and the rotating shaft 2 is rotated. When a gas, for example air, is supplied to the nozzle 4 from a gas supply source (not shown), the gas is blown to the nozzle 4.
The air lapping tape 3 that is blown out is brought into pressure contact with the magnetic disk 1, and as the magnetic disk 1 rotates, the upper surface of the magnetic disk 1 is polished.

Furthermore, when the take-up reel 6 is rotated by a drive mechanism (not shown) during or after polishing the magnetic disk 1 described above, a new portion of the wrapping tape 3 is supplied from the supply reel 5 to the grindstone 7, and the abrasive grains of the wrapping tape 3 are The microprotrusions on the surface 3a are crushed or scraped to make it flat. Further, the portion of the wrapping tape 3 flattened by the grindstone 7 is supplied with gas to the nozzle 4 and wound onto the take-up reel 6.

In this way, the wrapping tape 3 is flattened in advance because the fine protrusions on the abrasive surface 3a of the wrapping tape 3 are removed by the grindstone 7 and the gas is supplied to the nozzle 4. No work is required, the work process is simplified, and processing costs can be reduced.

In addition, in the above embodiment, the case was explained in which the nozzle 4 was used for gas blowing as the tape pressure welding means.
A roller head or a pressing plate biased by a spring may be pressed directly against the wrapping tape 3. The grinding wheel 7 is not limited to ceramic, but may also be made of, for example, a hard metal. The explanation has been given on the case where only one side of the magnetic disk l is wrapped, but when wrapping both sides at the same time, the wrapping tape 3, the gas blowing nozzle 4, the supply reel 5, the take-up reel 6, the grinding wheel 7, etc. are used to wrap the magnetic disk l. Just add another pair on the other side.

[Effects of the Invention] As is clear from the above description, according to the present invention, the grindstone is disposed between the tape pressure contact means and the supply reel so as to be in pressure contact with the abrasive grain surface of the lapping tape. The process can be simplified and processing costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing an embodiment of the present invention;
The figure is an explanatory diagram showing the relationship between the abrasive grain surface of the lapping tape and the grindstone. 1: Magnetic disk, 2: Rotating shaft, 2a: Chuck, 3: Wrapping tape, 3a:
Abrasive grain surface, 4: Nozzle for gas blowing, 5: Supply reel, 6: Take-up reel, 7: Grindstone. 1st S 2: Rotation axis 20: (Yashifu 3: U・Sopi>7" Tape 3a: Stone & H side 4: L body 4 sun 1 Funosuru 5: N Town T reel 6: 4-Tori reel 7: A stone figure 2

Claims (1)

[Claims] a drive mechanism that supports and rotationally drives a magnetic disk; a tape pressure contact unit that presses a wrapping tape against the surface of the magnetic disk; and a supply reel that winds the wrapping tape and supplies the wrapping tape to the tape pressure contact unit. , in a magnetic disk polishing apparatus comprising a take-up reel for winding up the wrapping tape supplied to the tape pressure contact means, the tape pressure contact means and the supply reel so as to be in pressure contact with the abrasive grain surface of the lapping tape; A magnetic disk polishing device characterized in that a grindstone is disposed in the magnetic disk polishing device.