JP2571565B2 - Liner processing equipment for magnetic disk cleaning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for processing a magnetic disk cleaning liner to be adhered to the inner surface of a jacket. A non-dusting liner in which the cut end is sealed with a fixed width can be continuously manufactured at high speed.

[Conventional technology and its problems]

As is well known, a liner for a floppy disk plays an important role in cleaning the disk. However, currently used liners usually have a dust-generating aspect because their main material is a nonwoven fabric. That is, as a nonwoven fabric for a liner, a nonwoven fabric in which short fibers are entangled (water jet method), a nonwoven fabric obtained by blending heat-fusible fibers with a nonwoven fabric and heat-fused (heat bond method), and the like are currently used. However, all of these are coarser in density than woven fabrics, are only partially entangled or fused, and the fibers are inevitably dropped from the cut portions. Therefore, how to suppress the dust generation of a liner mainly composed of a nonwoven fabric has been studied as the biggest problem of the liner processing technology.

The present inventors have found that sealing the punched end of the liner has a great effect on reducing the amount of dust generation as the above-mentioned dust generation prevention measure, that is, the vicinity of this cut portion is particularly strongly pressure-bonded and heat-sealed to reduce the amount of fibers. It has been found that it is effective to prevent dust generation when the fused portion extends over substantially the entire end rather than a part thereof, and based on this finding, a liner having a punched end sealed therein was invented earlier.

In such a liner we invented earlier,
Since the seal width is within 3 mm from the punched end and the variation in the width is preferably within 1 mm, and the core circularity at the time of punching the liner is preferably within 0.3 mm, the device for obtaining such a liner is It is necessary to have a performance that can achieve such accuracy.

The conventional magnetic disk cleaning liner processing apparatus mainly includes a punching unit, and does not include a seal unit device for applying a seal to a punched end portion, and is therefore shown in FIGS. 5 and 6. As shown in FIG. 4, a liner B having an unsealed punched end cannot be manufactured. However, assuming that a seal unit is added to a conventional punching unit, as shown in FIG. Even if a device for transferring the nonwoven fabric A by arranging a pair of male and female shear die cutters) 60 in series and transferring the nonwoven fabric A is considered, the phase matching (punching at a position in accordance with the seal pattern) by this device will be a tensile strength of the nonwoven fabric. It is very difficult in terms of precision due to the low accuracy, and it is not possible to obtain a liner with the punched end sealed as described above due to transfer deviation. Can not. In addition, the liner punched by such a device is used for a jacket (shell) in a subsequent process.
It is also difficult to perform alignment during the step of attaching the substrate.

In FIG. 4, reference numeral 1 denotes an unwinding unit of a nonwoven fabric roll for unwinding a nonwoven fabric (raw material) A, a discharge unit of the punched liner B, and 9 a discharge unit of the discharged liner B to the next step. Unloading device, 70 is a non-woven fabric unwinding roll, 10
Is a winding unit (unnecessary part winding unit) for the punched waste C separated from the liner B.

[Means for solving the problem]

The present inventors have conducted intensive studies to develop a processing technique with a small phase shift as described above, and as a result, by performing sealing and punching in the same unit, that is, at a place where the nonwoven fabric is held, the phase shift can be reduced. It has been found that it can be reduced.

The present invention has been made based on such findings, and a single anvil roll is disposed between a unwinding unit of a nonwoven fabric for forming a liner and a winding unit of the nonwoven fabric after punching the liner, and the anvil roll is provided. The heat seal roll and the die cutter roll for punching are arranged in this order in the rotation direction of the anvil roll, and the nonwoven fabric unwound from the unwinding unit is annealed with the anvil roll and the heat After passing between a seal roll and the punching die cutter roll to sequentially perform sealing and liner punching, the non-woven fabric after punching the liner is wound by the winding unit. The present invention provides a disk cleaning liner processing apparatus, and a magnetic disk cleaning apparatus according to the present invention. According to the liner processing unit, because a seal and stamped on the anvil roll having a retaining function by a vacuum, it is possible to prevent the easy transfer deviation and meandering occurs in elongation without low tension transfer. In high tension transfer and processing, it is difficult to obtain a liner having a desired size because the nonwoven fabric shrinks after punching.

〔Example〕

Hereinafter, an embodiment of a liner processing apparatus for cleaning a magnetic disk according to the present invention shown in the drawings will be described.

In FIG. 1, 1 is a unit for unwinding a nonwoven fabric roll for unwinding a nonwoven fabric (raw material) A, 2 is a low tension feeding unit also serving as a slack amount control for releasing the nonwoven fabric winding stress, and 3 is a nip roll. 4 is an anvil roll 4 provided with a large number of vacuum holes (not shown) on the surface.
These are arranged in this order along the transport direction of the nonwoven fabric A.

The low tension feeding unit 2 takes in the non-woven fabric A from the unwinding unit 1 in a state where the nonwoven fabric A is hung down,
The non-woven fabric A is supplied to the nip roll 3 in a state where tension is not applied. The low tension feeding unit 2 is controlled so that the hanging state of the nonwoven fabric A is detected by the detectors 2a, 2a,. The reason why the non-woven fabric A is taken from the unwinding unit 1 in the state where the non-woven fabric A is hung down in the low tension feeding unit 2 is that the raw fabric roll supplied to the unwinding unit 1 has a stress due to the winding tension remaining. Since the nonwoven fabric A contracts immediately after unwinding due to this stress, the stress is temporarily released to allow time for the nonwoven fabric A to contract. When the non-woven fabric A is punched without passing through the low tension feeding unit 2,
The product (liner) after punching becomes elliptical and one does not fit into the jacket (shell), or one becomes small, and there is a concern that the entire magnetic disk (media) cannot be cleaned.

Further, the anvil roll 4 is provided with the nip roll 3.
The non-woven fabric A supplied from is transported in a state where the non-woven fabric A is vacuum-held on the surface by the vacuum holes. The anvil roll 4 may be provided with a cooling water inlet / outlet pipe 4a and a vacuum hose 4b as required, as shown in the drawing.

Thus, on the surface of the anvil roll 4, the heat seal roll 5 and the die cutting roll 6 for punching are arranged in this order in the rotation direction of the anvil roll 4. The heat seal roll 5 is for applying a pattern seal to the intended shape of the intended liner for a floppy disk on the nonwoven fabric A vacuum-held on the surface of the anvil roll 4, and the nonwoven fabric A is punched by the die cutter roll 6 for punching. When the liner is formed, heat sealing can be performed over the entire punched end of the liner. Also, die cutter roll 6 for punching
Is designed to punch the nonwoven fabric A provided with the pattern seal along the pattern seal.

As described above, the heat seal roll 5 and the die cutting roll 6 for punching are sequentially arranged in the rotation direction of the anvil roll 4, and the punching is not performed after the formation of the pattern seal, and conversely, prior to the formation of the pattern seal. If the heat seal roll 5 and the die cutter roll 6 for punching are arranged so that punching can be performed, the sharpness of the die cutter roll 6 for punching cannot be improved.

In FIG. 1, reference numeral 7 denotes a separation nip roll (unnecessary part separation roll) for separating a product (liner) and punching waste from the punched nonwoven fabric A, 8 denotes a discharge portion of the separated liner B, and 9 denotes a discharge portion of the separated liner B. An unloading device 10 for unloading the discharged liner B to the next process, and a winding unit (unnecessary part winding unit) 10 for the separated punched waste C.

Next, the manufacturing mode of the liner by the magnetic disk cleaning liner processing apparatus of the present invention having the above-described configuration will be described.

First, when the nonwoven fabric A is unwound from the unwinding unit 1, the unwound nonwoven fabric A is supplied to the low tension feeding unit 2 in a hanging state. From the low tension feeding unit 2, the nonwoven fabric A is supplied to the surface of the anvil roll 4 having a vacuum hole through the nip roll 3 in a state where tension is not applied.
The nonwoven fabric A is conveyed by the anvil roll 4 while being held in a vacuum on the surface of the nonwoven fabric.

Next, as described above, the nonwoven fabric A vacuum-held and conveyed by the anvil roll 4 is subjected to the pattern seal of the intended shape of the intended floppy disk liner by the heat seal press roll 5, and then the pattern seal is applied. The dried nonwoven fabric A is made of an anvil roll 4
Is transported to a position below the die cutter roll 6 for punching while maintaining the vacuum. At this time, since the nonwoven fabric A is vacuum-held by the anvil roll 4, there is no relative movement between the nonwoven fabric A and the anvil roll 4, and there is no phase shift.

Next, when the nonwoven fabric A is transferred to a position below the die cutting roll 6 by the anvil roll 4 in a state where there is no phase shift as described above, the nonwoven fabric A is punched by the die cutting roll 6 along the pattern seal. You.

Thereafter, the punched nonwoven fabric A is anvil roll 4
While holding the vacuum, the liner B reaches the separation nip roll 7, where the liner B and the cutting waste are separated, and the separated liner B is discharged to the next step by the discharge device 9 through the discharge unit 8. At this time, since the liner is kept at a fixed position, there is also an advantage that continuous automation of sticking to the jacket (shell) in the next step is extremely easy. On the other hand, the separated cutting waste C is taken up by the take-up unit 10.

As shown in FIGS. 2 and 3, the liner B manufactured as described above is provided with a seal of a fixed width over the entire punched end b and has no dust generation. .

Further, according to the rotary die method using the die cutter roll 6 for punching as described above, it is possible to speed up the punching of the nonwoven fabric A, and hence the production of the liner, as compared with the conventional punching method. That is, while the conventional punching method can produce a liner only at a speed of about 20 sheets / min, the rotary die method has
The liner can be manufactured at a speed of about 400 sheets / min. Unless the consistency with the speed of attaching the liner to the jacket (shell) in the subsequent process is considered, the liner can be manufactured at a rate of about 400 to 500 sheets / min. it can.

〔The invention's effect〕

According to the magnetic disk cleaning liner processing apparatus of the present invention, since it is possible to heat seal and cut in a state where the nonwoven fabric is always vacuum-held on the anvil roll,
A phase shift between the seal pattern and the punching pattern is small, and a highly accurate jacket liner can be obtained. Further, since the nonwoven fabric is punched by the die cutter roll for punching after sealing the end portion in advance, an effect that the liner can be continuously manufactured at high speed without generating dust can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of one embodiment of the present invention together with its usage, FIG. 2 is a plan view of a liner obtained by one embodiment of the present invention, and FIG. 3 is an enlarged view of a punched end portion. FIG. 4 is a perspective view showing an outline of a conventional liner punching apparatus in which a seal unit is further added together with the usage thereof, FIG. 5 is a plan view of a liner obtained by the conventional apparatus, and FIG. Is an enlarged sectional view of the punched end portion. 4 Anvil roll 5 Heat seal roll 6 Die cutter roll for punching

Claims (1)

(57) [Claims] 1. An anvil roll is disposed between a unit for unwinding a liner-forming nonwoven fabric and a unit for winding the nonwoven fabric after punching the liner, and a heat-seal roll and a punch are provided on the surface of the anvil roll. The die cutter roll for the, arranged in this order toward the rotation direction of the anvil roll, the nonwoven fabric unwound from the unwind unit, the anvil roll, the heat seal roll and the punch die cutter roll A liner processing apparatus for cleaning a magnetic disk, wherein a sealer and a liner are sequentially punched by passing through the gap, and then the liner is punched and the nonwoven fabric is wound by the winding unit.