JPH06223370A - Method and device for manufacturing magnetic disk member for fd - Google Patents

Abstract

PURPOSE:To inhibit the shake of a surface during the manufacture of a center core. CONSTITUTION:A magnetic disk member for FD is manufactured in such a manner that the draw fabrication, punching and burring of a center core are conducted in a single row or multi-rows by using a continuous metallic band plate, a continuous press workpiece, in which the flange peripheral section of the center core is held to a carrier frame, is obtained, the continuous press workpiece is passed successively through degreasing 7, washing 8 and drying processes 10 while being made to travel as it is, and the center core separated from a carrier frame is acquired or the center core in standard length or with the continuous carrier frame is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a magnetic disk member for FD (floppy disk), especially a center core, and a magnetic disk for FD using the center core obtained by the manufacturing method. A method for obtaining a member.

[0002]

2. Description of the Related Art Generally, a floppy disk is used.
y Disk) is a magnetic disk coated on the surface of a thin disk of Mylar, which is housed in a plastic package called a jacket. Magnetic data is magnetically placed on the concentric circles on the surface of this disk. Because of the flexible characteristics of recording and flexible disk (Flexible Disk)
Also called k). A metal center core is attached to the center of the toroidal magnetic disk.

In a conventional method for manufacturing a center core, a metal plate is drawn by a pressing machine, and at the same time, a peripheral edge of a flange end of the center core is cut, and individual center plates are punched out. -The core was separated, and the separated center core was collected to obtain the desired center core through a barrel process. This barrel process is mainly performed to remove the burrs from the peripheral edge of the flange of the center core and to remove the oil and fat deposits during molding. In the barreling process, individual center cores are collected and stored in a barrel container, and while rotating the barrel container, deburring of the center core, washing with water, removing dirt such as oil and fat, sorting / washing with water, washing with hot water, primary drying, Sorting, secondary drying, primary sorting and secondary sorting were performed sequentially to obtain individual center cores. Then, an adhesive was applied to the flange of the obtained center core, and the inner peripheral edge of the magnetic disk main body was fixed to this applied surface.

[0004]

However, in recent years, the FD has been remarkably increased in density and capacity, and one of the basic characteristics of the FD with increased density and capacity is the surface runout accuracy of the rotating magnetic disk. Sophistication is required. The surface wobbling accuracy during rotation of the magnetic disk is directly affected by the surface wobbling accuracy of the center-core flange mounted on the inner peripheral edge of the magnetic disk body. In addition, as a factor that affects the surface runout accuracy of the flange of the center core, the synergistic residual internal stress of the residual internal stress during manufacturing and rolling of the metal material and the residual internal stress generated by the drawing process of the center core is , The center core freely displaces as the flange peripheral edge is cut and opened, which inevitably occurs. Further, secondly, in the manufacturing process including the subsequent assembling process, the individual center cores rub against each other between the center cores and between the center core and the barrel container or the jig,
The residual internal stress is released due to impact, vibration, etc., which promotes deformation and displacement.

The present invention has been made in view of the above points, and a first object of the present invention is to draw a continuous carrier frame in a center core manufacturing process, and to perform a center core drawing process and a hole punching process. Formed during processing and barring,
By using the continuous center core included in the carrier frame, the inevitable surface run-out that occurs in the flange of the center-core is not generated until the final stage of the manufacturing process of the center-core. In addition, it is possible to minimize the surface run-out that occurs during processing and cleaning. A second purpose is to perform a cleaning and drying process in order to obtain a clean metal surface of the flange of the center core while continuously running the continuous center core in the cleaning and drying process. The second purpose is to prevent the surface run-out of the flange of the center core from occurring and to finish the cleaned surface cleanly. Further, a third object is to prevent the surface wobbling of the magnetic disk having the center core mounted thereon by using a continuous center core having an accurate positioning and a clean metal surface, and to increase the speed of the magnetic disk. The purpose is to stabilize the adhesive strength of the center core during rotation.

[0006]

A method of manufacturing a magnetic disk member for an FD according to the present invention uses a continuous metal strip to draw a center core in a single row or in multiple rows, punch holes, and punch holes. Ring processing is performed to obtain a continuous pressed product in which the peripheral edge portion of the flange of the center core is held by a carrier frame, and then degreasing and cleaning while running the continuous pressed product as it is, After passing through the drying process in sequence, a center core separated from the carrier frame or a center core with a regular or continuous carrier frame is obtained.

Further, in the method of manufacturing a magnetic disk member for FD according to the present invention, the center core is drawn, punched, and barred in a single row or multiple rows using a continuous metal strip. Then, after obtaining a continuous pressed product in which the peripheral edge of the flange of the center core is held by a carrier frame, degreasing, washing and drying steps are sequentially performed while the continuous pressed product is running. After being passed, the flange of the center core separated from the carrier frame, or the flange of a center core with a fixed length or a continuous carrier frame, provided at a predetermined interval, The ring-shaped double-sided adhesive tape is attached while unwinding a roll-shaped strip-shaped sheet having a ring-shaped double-sided adhesive tape around the periphery of the hole corresponding to the core.

In the method for manufacturing a magnetic disk member for FD according to the present invention, the center core is drawn, punched and barred in a single row or multiple rows using a continuous metal strip. After obtaining a continuous pressed product in which the peripheral edge of the flange of the center core is held by a carrier frame, the continuous pressed product is allowed to pass through degreasing, washing and drying steps while running. The flange of the center core separated from the carrier frame,
Alternatively, a ring-shaped double-sided adhesive tape is attached to the peripheral edge of the hole corresponding to the center core, which is formed at a predetermined interval on the flange of the center core with a fixed length or continuous carrier frame.
After sticking the ring-shaped double-sided adhesive tape while unwinding the band-shaped sheet having a roll shape, the center core mounted on the band-shaped sheet is continuously wound. Take or
Alternatively, it is formed into a regular length.

An apparatus for manufacturing a magnetic disk member for FD according to the present invention comprises a metal strip rolled in a roll shape, and a center core drawn and punched while continuously feeding the metal strip. A press machine capable of obtaining a continuous press-formed product in which the peripheral edge of the center core flange is held by a carrier frame by performing machining and barring in sequence.
The continuous pressed product is provided with an oil and fat washing tank, a water washing and washing tank, a water preliminarily removing chamber, and a warm air drying chamber, which sequentially perform degreasing, washing, and drying while running, along the running direction.

In the apparatus for manufacturing a magnetic disk member for FD, a carrier frame after drying is placed behind the warm air drying chamber.
A pair of rolls, through which a continuous press-formed product held by a frame is passed, are installed, and a hole periphery corresponding to a center core is formed at predetermined intervals so as to pass through the pair of rolls. A roll-shaped strip-shaped sheet having a ring-shaped double-sided adhesive tape is provided on the flange of the center core when the pair of rolls pass through while unwinding the strip-shaped sheet. The center core having the ring-shaped double-sided adhesive tape adhered thereto and the center core having the ring-shaped double-sided adhesive tape adhered thereto is provided with a winding reel for winding the center core together with the belt-shaped sheet and the interlayer sheet.

Further, in the method of manufacturing a magnetic disk member for FD according to the present invention, the center core is drawn, punched and barred in a single row or multiple rows using a continuous metal strip. Then, after obtaining a continuous pressed product in which the peripheral edge of the flange of the center core is held by a carrier frame, degreasing, washing and drying steps are sequentially performed while the continuous pressed product is running. Adhesive or adhesive is applied to the flange of the center core separated from the carrier frame after passing, or to the flange of the center core with a regular or continuous carrier frame, respectively. Is. Furthermore, FD
The method for producing a magnetic disk member for use is a ring-shaped double-sided adhesive tape adhered to each flange of the center core obtained by the above-mentioned method or an adhesive applied to the flange,
The adhesive surface of the adhesive is attached to the inner peripheral edge of the FD magnetic disk body that is sequentially fed while running intermittently.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic process drawing showing a method for manufacturing a magnetic disk member for FD. Reference numeral 1 is a metal strip plate made of a magnetic material, such as a continuous roll of stainless steel (including a case of a fixed size). As shown in FIG. 2, the metal strip 1 has a center core 2 in a single row (single row fixed length or continuous single row) or multiple rows (two or more rows in multiple rows) (multi-row fixed length or multiple row continuous). In this state, any of drawing forming, punching and barring may be performed. The metal strip 1 is sequentially drawn, punched and barred by a progressive press die 4 consisting of an upper die and a lower die attached to a high-speed precision automatic press 3, and the center strip is formed. Flange 2a of core 2
A continuous pressed product 6 (including a strip-shaped product) is obtained in which the peripheral edge of the tip is held by the carrier frame 5. Figure 2
Is a plan view of strip-shaped and continuous pressed products, (a)
Is a single-row standard, (b) is a single-row continuous shape, (c) is a multi-row standard,
(D) The multi-row continuous state is shown.

FIG. 3 (a) shows the manner of holding the continuous pressed product 4 held by the carrier frame 5.
As shown in FIG. 5, after the peripheral edge of the tip end of the flange 2a of the center core 2 is cut from the carrier frame 5, it is pressed into the hole of the carrier frame 5 again and fitted in a deburred state. In addition to the case (pushback method), as shown in FIG. 3B, the center core 2 is not cut at the peripheral edge of the tip of the flange 2a and is not cut, and FIG. There is a case where the center core 2 is in the mid-cutting process in which the cutting process is stopped midway along the tip peripheral portion of the flange 2a as shown in FIG. Both in the case of mid-cutting and in the case of non-cutting, cutting is performed in a post-process in a state where deburring is performed using a press machine that does not use oil and fat during punching.

After obtaining a continuous pressed product 6 in which the peripheral edge of the flange 2a of the center core 2 is held by the carrier frame 5, the continuous pressed product 6 is left as it is. And run through the steps of degreasing, washing and drying. In the degreasing step, oil cleaning and other stain removal are performed in the oil cleaning tank 7. It is recommended to use the oil and fat detergent that does not contain harmful substances. The oil / fat cleaning tank 7 is provided with a plurality of alkaline oil / fat cleaning liquids such as caustic soda having different pH and concentrations as in this example, and the oil / fat is positively separated by electrolysis or high frequency to enhance the cleaning power. It may be performed. In the washing step, after washing with oil and fat in the washing tank 8 with water, washing with water is performed. The washing and washing tank 8 has a washing washing tank 8a at the front stage and a warm water washing tank 8b at the rear stage. Then, the center core 2 washed with water
In order to remove the adhering water, a water pre-removal chamber 9 for performing air spraying or suctioning for removing the water is provided. Not only can the next warm air drying chamber 10 be shortened by passing through this preliminary moisture removing chamber 9,
The center core 2 can be dried at a relatively low temperature in a short time without giving a thermal influence such as a thermal strain. The peripheral edge portion of the flange 2a of the center core 2 is a carrier frame.
What is important when running the continuous pressed product 4 held in the frame 5 and sequentially passing through the degreasing, washing, and drying steps is that the belt-shaped continuous pressed product 6 is in a horizontal state. It is important to run vertically or upright rather than running. By doing so, the oil and fat components and the water components are quickly removed by utilizing the self-weight effect, and the drying is facilitated.

After passing through a series of degreasing, washing and drying steps while running the continuous pressed product 6 as it is, the center core 2 is separated from the carrier frame 5 to obtain individual center cores. Alternatively, the center core with a carrier frame is cut to a predetermined length to obtain a standard length (strip) (see FIG. 4) or a continuous core frame with a carrier frame in a non-cut roll state. In FIG. 4, 19 is a cutting machine for strip products, and 20 is a stocker for strip products.
After the center core 2 is dried, the peripheral edge of the flange 2a of the center core 2 is cut as shown in FIG. 3 (a), and the center core 2 is pressed again into the hole of the carrier frame 5 having the same diameter. In the case of fitting in the removed state, the center core 2 held by the carrier frame 5 is immediately disengaged and separated, and then the ring shape is used at a use stage or a desired stage. The double-sided adhesive tape 11 is attached to the flange 2a of the center core 2 or an adhesive or a pressure sensitive adhesive is applied to the flange 2a of the center core 2.
The flange 2a of the center core 2 is cut with the carrier frame 5 and is not cut (see FIG. 3B) or is cut midway (FIG. 3).
In the state of (c)), it is necessary to cut and separate the deburred state without using oil and fat by the above-mentioned press machine.

However, the center core 2 is not connected to the carrier frame.
When the strip-shaped or continuous pressed product 6 is not separated from the frame 3, the strip-shaped or continuous pressed product 6 is used as it is as a strip-shaped laminated product, or is used as a continuous roll. in this case,
A ring-shaped double-sided adhesive tape 11 is attached to the flange 2a of each of the center cores 2, and thereafter, it is cut and separated in a deburred state by a press machine without using oil and fat. If the ring-shaped double-sided adhesive tape 11 is not attached to the flange 2a of the center core 2 of the strip-shaped or continuous pressed product 6, after that, it is deburred without using oils and fats by a press machine. At the stage of use after cutting and separating, an adhesive or pressure-sensitive adhesive is applied to the flange 2a of the center-core 2.

A ring-shaped double-sided adhesive tape is attached to the flange 2a of the center core 2 after degreasing, washing and drying by the above method.
If you want to attach the adhesive tape, do as follows. As shown in FIG. 5, a ring-shaped double-sided adhesive tape 11 is formed on a peripheral edge of a hole corresponding to a center core formed in a single row or multiple rows at predetermined intervals on a double-sided adhesive tape reel 12. The roll-shaped sheet 13 having the roll-shaped sheet 13 is prepared and
When the strip-shaped sheet 13 wound in the shape of a reel is unwound, the release sheet 14 such as release paper or release tape that protects the adhesive surface on one side of the ring-shaped double-sided adhesive tape 11 is peeled off. Then, a release sheet reel 15 for winding is provided. The strip-shaped sheet 13 in which the release sheet 14 is peeled off while unwinding the strip-shaped sheet 13 wound in a roll shape is a standard length (strip) or a center with a continuous carrier frame 5. -Pass the core 2 between the pair of upper and lower double-sided adhesive tape attaching rolls 16.

When the center core 2 with the carrier frame 5 passes between the pair of upper and lower double-sided adhesive tape attaching rolls 16 which are in contact with each other, the ring-shaped double-sided adhesive is attached to the flange 2a of the center core 2. Tape 9 is attached. Also,
The center core 2 after being degreased, washed and dried by the above-mentioned method is separated from the carrier frame 5 and the individual center cores 2 are separated.
When the ring-shaped double-sided adhesive tape 9 is adhered to each flange 2a of the core 2, the center core 2 is intermittently supplied.
The strip-shaped sheet 13 is placed on the flange 2a of the above, and the ring-shaped double-sided adhesive tape 11 is attached.

Center core 2 with carrier frame 5
After the ring-shaped double-sided adhesive tape 9 is attached to the flange 2a of the center core 2 with the carrier frame 5 mounted on the belt-shaped sheet 13 by the center-core continuous winding reel 17. At the same time, the roll-shaped interlayer sheet 18 is wound while being unrolled. Further, even when the ring-shaped double-sided adhesive tape 9 is attached to each flange 2a of the individual center core 2 separated from the carrier frame 5, the center-core continuous winding reel 17 forms a strip shape. The center sheet 2 mounted on the sheet 13 and the interlayer sheet 18 wound in a roll shape are wound and unwound. Finally, the seal of the ring-shaped double-sided adhesive tape 11 attached to each flange 2a of the center core 2 is peeled off, or the adhesive applied to each flange 2a and the adhesive surface by the adhesive are attached to the FD. Magnetic disk body 1
It adheres to the inner peripheral edge of 0.

[0020]

As can be seen from the above description, the present invention uses a continuous metal strip to perform center core drawing, punching and barring in a single row or multiple rows.
After obtaining a continuous pressed product in which the peripheral edge of the flange of the center core is held by a carrier frame, the continuous pressed product is allowed to pass through degreasing, washing and drying steps while running. After that, a center core separated from the carrier frame is obtained, or a center core with a regular or continuous carrier frame is obtained, so that the flange of the center core is unavoidable in the past. The surface run-out that has occurred in the center core does not occur until the final stage of the manufacturing process of the center core, and the surface run-out that occurs during processing and cleaning can be suppressed to a minimum.
A magnetic disk member for D can be obtained, and the center
Immediately after the core drawing process, punching process and barring process, the degreasing, washing and drying steps can be performed continuously, the work efficiency is good, mass production is possible and the cost can be reduced.

Further, the center core is drawn, punched and barred in a single row or multiple rows using a continuous metal strip, and the peripheral edge of the flange of the center core is a carrier frame. After the continuous press-formed product held in the frame is obtained, the continuous press-processed product is allowed to pass through the degreasing, washing, and drying steps while running, and then the center separated from the carrier frame. -A ring-shaped double-sided adhesive tape is formed on the peripheral edge of the hole corresponding to the center core, which is formed at a predetermined interval on the flange of the core or on the flange of the center core with a fixed or continuous carrier frame. Since the ring-shaped double-sided pressure-sensitive adhesive tape was applied while unwinding the roll-shaped belt-shaped sheet having the ring-shaped double-sided pressure-sensitive adhesive tape, immediately after degreasing, washing and drying the center core, the ring-shaped double-sided pressure-sensitive adhesive tape was attached. To Center - can stuck to the core of the flange can be affixed to a flange surface that is washed clean, ring-shaped double-sided adhesive tape - can be firmly attached without peeling from Puga該 flange.

Further, the center core is drawn, punched and barred in a single row or multiple rows using a continuous metal strip, and the peripheral edge of the flange of the center core is a carrier frame. After the continuous press-formed product held in the frame is obtained, the continuous press-processed product is allowed to pass through the degreasing, washing, and drying steps while running, and then the center separated from the carrier frame. -A ring-shaped double-sided adhesive tape is formed on the peripheral edge of the hole corresponding to the center core, which is formed at a predetermined interval on the flange of the core or on the flange of the center core with a fixed or continuous carrier frame. After sticking the ring-shaped double-sided adhesive tape while unwinding the band-shaped sheet wound in a roll shape,
Since the center core mounted on the belt-shaped sheet is continuously wound or formed into a regular length, the ring-shaped double-sided adhesive tape is immediately attached after degreasing, washing and drying of the center core. Can be attached to the flange of the center core, can be attached to a cleanly cleaned flange surface, the ring-shaped double-sided adhesive tape can be firmly attached without peeling from the flange, and is continuously efficient. Since the center core is continuously wound by a belt-shaped sheet or formed into a regular length, the center core can be attached to the magnetic disk body for FD. The protection before being done is perfect and a high quality center core can be obtained.

Further, a metal strip plate wound in a roll shape,
While continuously feeding the metal strip, the center core is drawn, punched, and barred in order, and the center core flange peripheral portion is held by a carrier frame. A press machine that can obtain products, and an oil and fat cleaning tank that sequentially degreases, cleans, and dry while running the continuous pressed product as it is, a water washing cleaning tank, a water preliminary removal chamber, and a warm air drying chamber. Since it is provided along the running direction, it is possible to sequentially pass through the oil and fat washing tank, the water washing washing tank, the water preliminary removal chamber and the hot air drying chamber surface while continuously running the continuous pressed product.
It is possible to obtain an apparatus for obtaining a highly accurate magnetic disk member for FD in which degreasing, cleaning, and drying operations can be performed efficiently and easily, and surface wobbling that occurs during processing and cleaning is suppressed to a minimum.

Further, behind the warm air drying chamber, a pair of rolls for passing the continuous pressed product held by the dried carrier frame is installed, and the pair of rolls is provided. A band-shaped sheet wound in a roll shape having a ring-shaped double-sided adhesive tape is provided on the periphery of the hole corresponding to the center core formed at a predetermined interval so as to pass therethrough, and the band-shaped sheet is attached. While unwinding, a ring-shaped double-sided adhesive tape is attached to the flange of the center core while passing through the pair of rolls, and the center-core attached with the ring-shaped double-sided adhesive tape is attached to the belt-shaped sheet and Since a winding reel for winding together with the interlayer sheet is provided, the ring-shaped double-sided adhesive tape only needs to be attached to form the adhesive surface on the flange of the center core, and the flange that has been washed clean immediately Can be adhered, making strong adhesion possible , It is continuously efficiently bonding operation.

Further, after obtaining a continuous pressed product in which the peripheral edge portion of the flange of the center core is held by the carrier frame, degreasing, washing and drying steps are carried out while the continuous pressed product is run as it is. , And then apply the adhesive or adhesive to the flange of the center core separated from the carrier frame or to the flange of the center core with a fixed length or continuous carrier frame, respectively. Even if it is done, it is possible to obtain a highly accurate magnetic disk member for FD that suppresses the surface wobbling that occurs during processing and cleaning, and it is also possible to immediately bond it to a cleanly cleaned flange, making a strong bond. This enables continuous and efficient bonding work.

Further, the ring-shaped double-sided adhesive tape adhered to each flange of the center core obtained by the above method, the adhesive applied to the flange, and the adhesive surface formed by the adhesive are sequentially run intermittently. Since it is attached to the inner peripheral edge of the FD magnetic disk body to be sent, it is possible to continuously manufacture high-precision FD magnetic disk members that suppress surface fluctuations that occur during processing and cleaning, enabling mass production. Therefore, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic process diagram showing a method for manufacturing an FD magnetic disk member.

FIG. 2 is a plan view of strip-shaped and continuous pressed products,
(A) shows a single-row standard, (b) shows a single-row continuous, (c) shows a multi-row regular, and (d) shows a multi-row continuous.

FIG. 3A is a state in which a tip peripheral portion of the center core flange is cut, FIG. 3B is a state in which cutting is not performed, and FIG. 3C is a carrier frame in which the center core flange is cut.
It is sectional drawing which respectively shows the state of a cutting | disconnection and a cutting midway processing.

FIG. 4 is a schematic process diagram showing a method for manufacturing an FD magnetic disk member.

FIG. 5 is a schematic process diagram showing a method of manufacturing a magnetic disk member for FD.

FIG. 6 is an explanatory view in which a ring-shaped double-sided adhesive tape is attached to the center core, (a) is a cross-sectional view in which the ring-shaped double-sided adhesive tape is attached to the flange of the center core, and (b). Is a plan view in the case where the center core is independent, (c) is a plan view in the case where the center core is a single row standard length, (d) is a plan view in the case where the center core is in a single row continuous state, (e) FIG. 8A is a plan view when the center core is a multi-row regular size, and FIG. 6F is a plan view when the center core is a multi-row continuous shape.

FIG. 7 is an explanatory view in which a center core having a ring-shaped double-sided adhesive tape attached is attached to a belt-shaped sheet, and (a) shows the center.
Cross-sectional view of the core attached to the belt-shaped sheet, (b) is the center
Plan view of a single core, (c) is a plan view of a single-row center core, (d) is a plan view of a single continuous center core, (e) is a center -A plan view in the case where the core has a multi-row fixed size, and (f) is a plan view in the case where the center core has a multi-row continuous shape.

[Explanation of symbols]

1 Metallic Plate 2 Center-Core 2a Flange 3 High-speed Precision Automatic Press Machine 4 Progressive Press Mold 5 Carrier Frame 6 Pressed Product 7 Oil / Fat Cleaning Tank 8 Rinsing / Cleaning Tank 9 Water Preliminary Removal Room 10 Warm Air Drying Room 11 Ring-shaped double-sided adhesive tape 12 Double-sided adhesive tape reel 13 Band-shaped sheet 16 Double-sided adhesive tape sticking roll 17 Center-core continuous winding roll 19 Cutting machine for strip products 20 Strip product stocker

Claims (7)

[Claims] 1. A center-core drawing process, a hole-punching process, and a bar process using a continuous metal strip in a single row or multiple rows.
After performing ring processing to obtain a continuous pressed product in which the peripheral edge of the center core flange is held by a carrier frame, degreasing, washing, and drying while running the continuous pressed product as it is. A magnetic disk member for FD, which is characterized by obtaining a center core separated from a carrier frame after sequentially passing through the steps, or obtaining a center core with a regular or continuous carrier frame. Manufacturing method. 2. A center-core drawing process, a hole-punching process, and a bar process using a continuous metal strip in a single row or multiple rows.
After performing ring processing to obtain a continuous pressed product in which the peripheral edge of the center core flange is held by a carrier frame, degreasing, washing, and drying while running the continuous pressed product as it is. After passing through the process sequentially, the flange of the center core separated from the carrier frame or the flange of the center core with a fixed length or continuous carrier frame is drilled at a predetermined interval. Characterized in that the ring-shaped double-sided adhesive tape is adhered while unwinding a roll-shaped strip-shaped sheet having a ring-shaped double-sided adhesive tape around the hole corresponding to the center core. And a method of manufacturing a magnetic disk member for FD. 3. A center-core drawing forming process, a punching process and a bar forming process using a continuous metal strip in a single row or multiple rows.
After performing ring processing to obtain a continuous pressed product in which the peripheral edge of the center core flange is held by a carrier frame, degreasing, washing, and drying while running the continuous pressed product as it is. After passing through the process sequentially, the flange of the center core separated from the carrier frame or the flange of the center core with a fixed length or continuous carrier frame is drilled at a predetermined interval. After adhering the ring-shaped double-sided adhesive tape while unwinding the roll-shaped strip-shaped sheet having the ring-shaped double-sided adhesive tape around the hole corresponding to the center core, An FD characterized in that a center core mounted on a belt-shaped sheet is continuously wound or formed into a regular length.
Of manufacturing magnetic disk member for automobile. 4. A center strip, which comprises a metal strip wound in a roll shape and a center core which is successively drawn, punched and barred while continuously feeding the strip. A press machine capable of obtaining a continuous press-formed product whose flange peripheral portion is held by a carrier frame, and an oil and fat that sequentially performs degreasing, washing, and drying while the continuous press-formed product is running. An apparatus for manufacturing a magnetic disk member for FD, comprising: a cleaning tank, a washing tank, a preliminary water removing chamber, and a warm air drying chamber along the running direction. 5. A pair of rolls, through which a continuous pressed product held by a carrier frame after drying passes, are installed behind the warm air drying chamber according to claim 4, and the pair of rolls are provided. A roll-shaped strip-shaped sheet having a ring-shaped double-sided adhesive tape is provided on the peripheral edge of a hole corresponding to a center core formed at a predetermined interval so as to pass through the roll. While unwinding the belt-shaped sheet, the center is set when passing through the pair of rolls.
A ring-shaped double-sided adhesive tape is attached to the flange of the core, and a winding reel is provided for winding up the center core with the ring-shaped double-sided adhesive tape attached thereto together with the belt-shaped sheet and the interlayer sheet. An apparatus for manufacturing a magnetic disk member for FD, which is characterized in that 6. A center-core drawing process, a hole-punching process, and a bar process using a continuous metal strip in a single row or multiple rows.
After performing ring processing to obtain a continuous pressed product in which the peripheral edge of the center core flange is held by a carrier frame, degreasing, washing, and drying while running the continuous pressed product as it is. After sequentially passing through the process, an adhesive or an adhesive is applied to the flange of the center core separated from the carrier frame or the flange of the center core with a fixed length or continuous carrier frame, respectively. A method for manufacturing a magnetic disk member for FD, which is characterized by being applied. 7. A ring-shaped double-sided adhesive tape adhered to each flange of the center core obtained by the method of claim 1, an adhesive applied to the flange, or an adhesive surface adhered by the adhesive is intermittently run. A method of manufacturing a magnetic disk member for FD, characterized in that the magnetic disk member for FD is attached to the inner peripheral edge of the main body of the magnetic disk for FD that is sequentially sent.