JP4515998B2 - Film peeling device - Google Patents

Description

The present invention relates to a film peeling apparatus for removing a film formed on a resin substrate such as an optical disk such as a CD-ROM or a DVD-ROM.

  At present, optical disks such as CD-ROMs and DVD-ROMs are widely used as storage media for various data such as music / video and game machines / computers. These optical disks are provided with a metal film on one or both surfaces of a substrate made of a disc-shaped polycarbonate resin, and a protective coating is applied on the metal film and necessary printing is performed.

  By the way, conventionally, most of the defective products and stock disposal products generated in the manufacturing process of these optical discs are crushed as they are and incinerated or disposed of in landfills. Recently, however, interest in conservation of the global environment has increased, and in order to save resources, recycling is being carried out to collect polycarbonate resin used in large quantities in optical discs and to reuse the collected polycarbonate resin.

  As a recovery method for recovering the polycarbonate resin from the optical disc, for example, a method has been proposed in which the optical disc is pulverized and the pulverized optical disc is solvent-treated, and then the polycarbonate resin is recovered from the processed optical disc. However, since this recovery method recovers the polycarbonate resin from the crushed optical disk, there is a problem that the separation between the polycarbonate resin and the metal film is complicated.

  In order to solve this problem, Patent Document 1 discloses that a low-pressure high-speed air stream is mixed with a scouring material, and a low-pressure blasting process in which the scouring material is sprayed onto the metal film of the optical disk to peel off and remove the metal film from the optical disk. Techniques to do this are disclosed.

  However, the peeling method that performs the low-pressure blasting process disclosed in Patent Document 1 requires the management of the blast polishing material, and thus has a problem that the management is complicated. Moreover, the peeling method using a blasting material tends to be avoided from the environmental aspect. This problem also occurs in the case of automobile parts and other parts obtained by electroless plating on the surface of a synthetic resin member other than the optical disk.

  In order to solve the problem related to the optical disk among the above problems, Patent Document 2 discloses that the optical disk placed on the turntable is rotated, and the optical disk radial direction is injected while high-pressure water is jetted from the nozzle onto the metal film of the optical disk. A technique is disclosed in which the nozzle is moved to peel off the metal film of the optical disk.

However, the peeling method using high-pressure water disclosed in Patent Document 2 requires that the optical disk be placed on the turntable for each treatment, and the optical disk is rotated along with the rotation of the optical disk placed on the turntable. Batch processing is required to move the nozzle in the radial direction. For this reason, for example, when a plurality of optical discs are peeled off, batch processing is required for each optical disc to be processed.
JP 11-277535 A JP-A-10-83578

The present invention has been made in view of the above problems, and an object of the present invention is to provide a film peeling apparatus capable of increasing the efficiency of peeling and removing a metal film from the surface of an optical disk.

Moreover, this invention provides the film peeling apparatus which can peel and remove a metal film efficiently from the surface of the resin material of the said article about the article by which the metal film is provided in the surface of the resin material. Objective.

The present invention provides a film peeling apparatus that peels off a metal film from an optical disk having a metal film formed on a surface of a resin material, and includes a conveying unit that conveys the optical disk, and a metal film of the optical disk that is conveyed by the conveying unit. A nozzle head in which a plurality of nozzles for injecting high-pressure water are arranged substantially linearly in a width direction orthogonal to a transport direction in which the transport means transports an optical disk, and at both ends of the plurality of nozzles in the width direction. A nozzle head in which the distance between the nozzles is substantially the same as the diameter of the optical disk, and the other nozzles of the plurality of nozzles are arranged at a predetermined interval between the nozzles on both ends, and the nozzle head is provided. Oscillating means for oscillating the nozzle head so as to oscillate more than a maximum distance among two adjacent nozzles of the plurality of nozzles. Prior to the step of the plurality of nozzles in the middle conveying the optical disk to be conveyed by the conveying means to inject high pressure water to the metal coating of the optical disk, one or more nozzles for injecting high pressure water to the metal coating of the optical disc It is a film peeling apparatus characterized by having a high-pressure water jetting apparatus .

The present invention provides a film peeling apparatus that peels off a metal film from an optical disk having a metal film formed on a surface of a resin material, and includes a conveying unit that conveys the optical disk, and a metal film of the optical disk that is conveyed by the conveying unit. A nozzle head in which a plurality of nozzles for injecting high-pressure water are arranged substantially linearly in a width direction orthogonal to a transport direction in which the transport means transports an optical disk, and at both ends of the plurality of nozzles in the width direction. A nozzle head in which the distance between the nozzles is substantially the same as the diameter of the optical disk, and the other nozzles of the plurality of nozzles are arranged at a predetermined interval between the nozzles on both ends, and the nozzle head is provided. Oscillating means for oscillating the nozzle head so as to oscillate more than a maximum distance among two adjacent nozzles of the plurality of nozzles. In the course of transporting the optical disk transported by the transport means, the plurality of nozzles has a scratch forming means for scratching the metal film of the optical disk before the step of spraying high-pressure water onto the metal film of the optical disk. It is a film peeling apparatus .

  According to the present invention, it is possible to increase the efficiency of peeling and removing the metal film from the surface of the optical disk. Moreover, according to this invention, there exists an effect that a metal film can be efficiently peeled and removed from the surface of the resin material of the said article | item about the article | item in which the metal film is provided on the surface of the resin material.

A film peeling apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In this specification and the like, an optical disk indicates an optical information recording medium such as a CD-ROM or a DVD-ROM.

[First Embodiment]
FIG. 1 is a perspective view showing an optical disc film peeling apparatus according to an embodiment of the present invention.
FIG. 1A is a perspective view showing an optical disc film peeling apparatus 100 according to the first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the nozzle swinging device 10 constituting the coating film peeling device 100 for the optical disk.

  The film peeling apparatus 100 includes a nozzle swing device 10, an optical disk transport unit 110, an operation unit (not shown), and a control unit (not shown). The nozzle oscillating device 10 has a pipe 50 connected to the upper end thereof, and is connected to the high-pressure water generator 200 via the pipe 50.

  The high-pressure water generator 200 is a high-pressure water generator that outputs high-pressure water to the pipe 50.

  The nozzle oscillating device 10 includes eight nozzles 11a to 11h, a nozzle holding portion 12, a tube shaft 13, a case 14, a rotating member 15, a first gear 16, a frame 17, a hose 18, and piping. It has the connection part 19, the motor 20, the 2nd gearwheel 21, bearing 30a-30d, and bearing 31a-31d.

  The nozzles 11 a to 11 h are nozzles that are provided in the nozzle holding unit 12 and inject (discharge) the high-pressure water output from the high-pressure water generator 200. For example, the pressure of the high-pressure water ejected from the nozzles 11a to 11h is 30 MPa to 150 MPa, and the nozzle diameter of the nozzles 11a to 11h is φ0.1 to φ0.4. The injection angle of the high-pressure water injected from the nozzles 11a to 11h is 0 ° with respect to the axial direction of the tube shaft 13 as shown in FIG. In any case, the injection angle of the high-pressure water is not limited to this.

  The nozzle holding unit 12 is a holding unit that holds the nozzles 11 a to 11 h in a straight line, and is provided on the tube shaft 13. Specifically, the nozzles 11a to 11h are arranged substantially linearly in the width direction orthogonal to the transport direction of the optical disk, and the distance between the nozzles 11a and 11h at both ends in the width direction of the nozzles 11a to 11h The other nozzles 11b to 11g of the nozzles 11a to 11h are arranged at a predetermined interval between the nozzles 11a and 11h at both ends. In the first embodiment, the eight nozzles 11a to 11h will be described. However, the first embodiment is also applied to the case where the nozzle holding unit 12 includes seven or less or nine or more nozzles. Can do. Further, the nozzles 11a to 11h are linearly provided on the nozzle holding unit 12 as shown in FIG. 1, but may be provided in a staggered manner, and the optical disk transport unit 110 transports the optical disk. Alternatively, the nozzles 11a to 11h may be disposed on the nozzle holding portion 12 while being shifted from each other in the width direction orthogonal thereto.

  The tube shaft 13 is a flexible tube having one end supporting the nozzle holding portion 12 and the other end connected to the hose 18. When the ultra-high pressure water from the high-pressure water generator 200 is fed into the nozzle holder 12 through the hose 18 and the tube shaft 13, the ultra-high pressure water branches into eight in the middle of the nozzle holder 12, and the eight nozzles It is divided into 11a-h. The separated super high pressure water is jetted from the eight nozzles 11a to 11h.

  The rotating member 15 has a hole for rotatably locking the tube shaft 13 with bearings 30a to 30d, and is rotatably locked to the case 14 by bearings 31a to 31d provided on the case 14. In addition, the hole of the rotation member 15 is provided in the rotation center of the rotation member 15 on the hose 18 side, and is provided so as to move away from the rotation center as it proceeds to the nozzle holding unit 12 side. For example, the distance between the opening of the hole of the rotating member 15 on the nozzle holding unit 12 side and the rotation center of the rotating member 15 is i.

  The first gear 16 is a gear that is provided on the rotating member 15 and engages with a gear 21 provided on the output shaft of the motor 20.

  The hose 18 is an ultra-high pressure resistant hose having one end connected to the tube shaft 13 and the other end connected to the pipe connection portion 19. The pipe connection part 19 is connected to the pipe 50.

  The motor 20 is a variable speed motor that is fixed to the case 14 and rotates the gear 21 provided on the output shaft based on control from the control unit. When the motor 20 rotates the gear 21, the rotating member 15 rotates together with the gear 16 engaged with the gear 21. Further, when the rotating member 15 rotates in the case 14, the hole provided in the rotating member 15 moves on the circumference around the rotation center of the rotating member 15. In this case, since the distance between the opening of the hole of the rotating member 15 and the rotation center of the rotating member 15 on the nozzle holding part 12 side is i, the opening of the hole performs a circumferential motion with a radius i. .

  Similar to the circumferential movement of the hole, the tube shaft 13 that is rotatably locked to the hole performs a circumferential movement around the rotation center of the rotating member 15. Thus, when the tube shaft 13 makes a circumferential motion, the nozzle holding portion 12 provided at one end of the tube shaft 13 and the nozzles 11a to 11h held by the nozzle holding portion 12 make a circumferential motion. For this reason, the water ejected from the nozzles 11a to 11h draws a circular ejection trajectory. In addition, the nozzles 11a to 11h and the nozzle holding portion 12 are swung so that the vibration is greater than the maximum distance among the two adjacent nozzles of the nozzles 11a to 11h. In other words, when the nozzles 11a to 11h are arranged at equal intervals, the nozzles 11a to 11h and the nozzle holding unit 12 perform circumferential motion so that j ≦ 2i, where j is the distance between the intervals. Alternatively, when the maximum distance among two adjacent nozzles among the nozzles 11a to 11h is j, the movement trajectory of the nozzles 11a to 11h is a circle having a radius of j / 2 or more. Inject the high-pressure water. Note that the swing generally means a combined rotational motion combining two motions of the rotational motion of the shaft body and the circumferential motion of the shaft body. This means that the shaft does not rotate itself but only moves in a circumferential direction.

FIG. 3 (1) is a diagram schematically showing the trajectory of water ejected from six nozzles arranged in series as an example of the trajectory of water ejected from the nozzle. Thus, the injection pattern of the high-pressure water injected from each nozzle 11a-h becomes a kind of surface.
FIG. 3 (2) shows an example of the trajectory of water sprayed from the nozzles, in which only two nozzles are provided in the nozzle holding part, and the interval between the two nozzles is made larger than the diameter of the CD 300a. It is a figure which shows roughly the locus | trajectory of water at the time of rotating. In this case, as shown in FIG. 3 (2), the injection trajectory concentrates at both end portions in the width direction orthogonal to the conveyance direction of the optical disk, and unevenness occurs in the high-pressure water injection pattern.

  The operation unit inputs various information for operating the film peeling apparatus 100 and outputs the input information to the control unit.

  The control unit includes a CPU and a memory (not shown). The CPU controls the entire film peeling apparatus 100 and the high-pressure water generator 200 based on various control programs stored in the memory. The memory is a memory that stores various information input from the operation unit and stores various control programs.

  The optical disk transport unit 110 includes a transport conveyor 111, a conveyor drive motor (not shown), a filter (not shown), and a drain tank (not shown).

  The conveyor 111 is a conveyor that is made of a mesh belt and conveys the optical disc 300, and is driven by a conveyor driving motor. Further, as shown in FIG. 1 (1), a nozzle swinging device 10 is disposed above the conveyor 111, and a nozzle height adjusting device (not shown) for adjusting the height of the nozzles 11a to 11h is provided. The film peeling apparatus 100 is provided. Moreover, the high pressure water sprayed by the nozzles 11a to h is filtered by the filter, and the water filtered by the filter is drained by the drain tank.

  FIG. 4 is a cross-sectional view showing a general structure of a CD (CD-ROM) 300a which is an example of an optical disk.

  The CD 300 a is provided with a hole 310 at the center, and is composed of a resin material 301, a metal coating 302, and a coating layer 303. As the resin material 301, polycarbonate, acrylic resin, or the like is used. Specifically, a metal film 302 formed by vapor-depositing aluminum or an aluminum alloy is provided on one surface of the resin material 301, and the surface (deposition surface) of the metal film 303 is a coating layer 303 made of a transparent hard resin. Covered by. Further, unevenness (not shown) is formed on one surface of the resin material 301 on the side where the metal coating 302 is deposited, and pits for writing data are formed. The metal coating 302 is for reflecting the reading laser beam irradiated to the pits with a high reflectance. The thickness of the metal coating 302 is about 0.1 μm, and the total thickness of the CD 300a is 1.2 mm.

Next, operation | movement of the film peeling apparatus 100 is demonstrated.
As shown in FIG. 1 (1), the CD 300 a with the vapor deposition surface on the upper side is placed on the transport conveyor 111 at a predetermined interval, and the transport conveyor 111 is driven. In this case, the CD 300a is placed so that the CD 300a passes through the region of high-pressure water ejected by the nozzles 11a to 11h of the coating film peeling apparatus 100. Subsequently, the transport conveyor 111 transports the CD 300a to below the nozzles 11a to 11h. Subsequently, when the CD 300a placed on the conveyor 111 passes under the nozzles 11a to 11h, each of the nozzles 11a to 11h injects high-pressure water onto the CD 300a and peels off the metal coating 302 formed on the CD 300a. To do. In this case, since each nozzle 11a-h injects high pressure water so that the locus | trajectory shown in FIG. 3 (1) may be drawn, the injection pattern of the high pressure water injected from each nozzle 11a-h becomes a kind of surface. . For this reason, the high-pressure water can be sprayed uniformly on the CD 300a, thereby preventing the occurrence of peeling unevenness. Subsequently, the transport conveyor 111 transports the CD 300a that has passed under the nozzles 11a to 11h and has finished the peeling operation. The above operations are sequentially executed.

  In this way, while the CD 300a placed on the transport conveyor 111 is being transported, each nozzle 11a-h sprays high-pressure water onto the CD 300a, and the sprayed water has a circular ejection trajectory on the CD 300a. Therefore, water easily enters between the resin material 301 and the metal coating 302. For this reason, when jet jet is injected in a state filled with fluid, the jet that has entered the cracked part is a phenomenon that causes the reaction to push the fracture surface of the workpiece in the direction perpendicular to the jet axis. The wedge effect is generated on the CD 300a, and the peeling effect is great.

  Therefore, according to the first embodiment, the efficiency of peeling and removing the metal film from the surface of the CD 300a can be increased.

[Second Embodiment]
FIG. 1 (2) is a perspective view showing an optical disc film peeling apparatus 101 according to a second embodiment of the present invention.

  The configuration of the coating film peeling apparatus 101 is substantially the same as the configuration of the coating film peeling apparatus 100 except for the optical disk transport unit 110a including the rotary table (rotary work table) 111a.

  As shown in FIG. 1 (2), the CD 300a with the deposition surface facing upward is transported onto the rotary table 111a by the transport mechanism (not shown) that transports the CD 300a in the direction of the arrow 120, and the CD 300a is placed on the rotary table 111a. Place at predetermined intervals. Further, the rotary table 111a transports the CD 300a that has passed under the nozzles 11a to 11h and has undergone the peeling process, and the CD 300a is transported outside the rotary table 111a by a transport mechanism (not shown) that transports the CD 300a in the direction of the arrow 121. Transport. The above operations are sequentially executed.

[Third Embodiment]
In the third embodiment of the present invention, two nozzle oscillating devices (nozzle oscillating device 10 and second nozzle oscillating device) are provided on the conveyor 111 of the optical disk conveying unit 110 shown in FIG. It is provided. Specifically, the second nozzle oscillating device and the nozzle oscillating device 10 are arranged in this order along the traveling direction of the conveyor 111. Further, when performing the peeling process, each nozzle of the second nozzle swinging device sprays high pressure water onto the CD 300a while the CD 300a placed on the transport conveyor 111 is being transported, and the surface of the CD 300a is scanned. Each nozzle 11a-h injects high pressure water to CD300a after making it exfoliate and exfoliating processing of the 2nd nozzle rocking device. In this way, after the surface of the CD 300a is peeled off by the second nozzle swinging device, the high pressure water is further sprayed onto the CD 300a. Water easily enters between the layer with the coating 302. Therefore, the water wedge effect can be enhanced and the peeling effect can be further enhanced.

  It should be noted that the number of nozzles of the second nozzle oscillating device may be made smaller than the number of nozzles (8) of the nozzle oscillating device 10, and the installation interval of each nozzle of the second nozzle oscillating device. May be made larger than the nozzle installation interval of the nozzle swinging device 10.

  That is, each nozzle of the second nozzle swinging device sprays high-pressure water onto the surface of the CD 300a at an appropriate interval in the width direction during the transport of the CD 300a placed on the transport conveyor 111, and the surface of the CD 300a in the width direction. Make sure to peel at appropriate intervals. Subsequently, after the peeling process by the second nozzle rocking device, the nozzles 11a to 11h of the nozzle rocking device 10 inject the high-pressure water onto the CD 300a on the portion that has not been peeled off by the second nozzle rocking device. High pressure water is sprayed on all surfaces.

  By doing so, it is possible to prevent the metal film from remaining on the CD 300a and further enhance the peeling effect. Instead of providing the second nozzle oscillating device, a high pressure water injection device including one or a plurality of nozzles for injecting high pressure water to the surface of the CD 300a is provided in order to peel a part of the surface of the CD 300a. Alternatively, the blade shown in the fourth embodiment may be provided.

[Fourth Embodiment] (Installation of scratch forming means)
The fourth embodiment of the present invention is an embodiment in which a scratch forming means for forming a scratch on the surface of the CD 300a is provided on the transport conveyor 111 of the optical disk transport section 110 shown in FIG. Specifically, the flaw forming means and the nozzle swinging device 10 are arranged in this order along the traveling direction of the conveyor 111. The scratch forming means is, for example, a cutting tool that scratches the surface of the CD 300a or a cutting device that cuts the CD 300a. When performing the peeling process, the flaw forming means forms a flaw on the surface of the CD 300a in the middle of conveying the CD 300a placed on the conveyer 111, and after each flaw is formed, each nozzle 11a˜ h injects high pressure water into the CD 300a. Thus, after forming a scratch on the surface of the CD 300a, high-pressure water is jetted onto the CD 300a, so that water easily enters between the layers of the resin material 301 and the metal coating 302 through the formed scratch. Therefore, the water wedge effect can be enhanced and the peeling effect can be further enhanced.

[Fifth Embodiment]
In the fifth embodiment of the present invention, nozzles (nozzles 11a and h) at both ends of the nozzles 11a to 11h held by the nozzle holding unit 12 shown in FIG. In this embodiment, the high-pressure water from the CD 300a is inclined toward the center of the CD 300a placed on the conveyor 111 so that the high-pressure water is sprayed onto the side surface of the CD 300a.

  By doing so, it is possible to prevent the metal film from remaining on the CD 300a and further enhance the peeling effect.

  The above embodiments may be combined.

  When an optical disc with a metal coating on both sides of a resin material such as DVD is peeled off, it is separated into two in the middle of the side surface of the optical disc, and the peeling treatment is performed on the surface on which the metal coating is provided. To do. Alternatively, the peeling treatment can be sequentially performed on each surface.

  As described above, according to each embodiment, when the optical disk is peeled off, no solvent or blast is used, so that the working environment can be improved and management can be facilitated. Further, since it is easy to separately collect the metal film peeled from the optical disk, complicated separation and collection are not required. Furthermore, the amount of processing can be greatly improved by moving the optical disk in the direction of high-pressure water jet so as to cross relatively. That is, the efficiency of peeling and removing the metal film from the surface of the optical disk can be increased.

  In the case of an article other than an optical disc in which a metal coating such as aluminum or aluminum alloy is provided on the surface of a resin material such as polycarbonate or acrylic resin, when the metal coating is peeled from the surface of the resin material of the article, Each of the above embodiments can be applied.

  The present invention is applied to an article such as an optical disc in which a metal coating such as aluminum or an aluminum alloy is provided on the surface of a resin material such as polycarbonate or acrylic resin, when the metal coating is peeled off from the surface of the resin material of the article. Can be used.

The perspective view which shows the film peeling apparatus of the optical disk which is embodiment of this invention. FIG. 3 is a cross-sectional view showing the nozzle swing device 10. The figure which shows roughly the locus | trajectory of the water sprayed from the nozzle. Sectional drawing which shows the general structure of CD300a which is an example of an optical disk.

Explanation of symbols

10: Nozzle swinging device,
11a-h …… Nozzle,
12 ... Nozzle holding part,
13 …… Tube axis,
14 …… Case,
15 …… Rotating member,
16 …… First gear,
17 …… Frame,
18 …… Hose,
19 …… Piping connection,
20 …… Motor,
21 …… Second gear,
30a-30d, 31a-31d …… Bearings,
50 …… Piping,
100 …… Optical film peeling device,
110 …… Optical disc transport unit,
200: High-pressure water generator.

Claims (3)

In the film peeling apparatus for peeling the metal film from the optical disk in which the metal film is formed on the surface of the resin material,
Conveying means for conveying the optical disc;
A nozzle head in which a plurality of nozzles for injecting high-pressure water onto a metal film of an optical disk transported by the transport means are arranged substantially linearly in a width direction orthogonal to a transport direction in which the transport means transports an optical disk, The distance between the nozzles at both ends in the width direction among the plurality of nozzles is substantially the same as the diameter of the optical disc, and the other nozzles of the plurality of nozzles are disposed at a predetermined interval between the nozzles at the both ends. Nozzle head,
As the maximum distance or more oscillating among distances between two adjacent nozzles among the plurality of nozzles are arranged in the nozzle head, and swinging means for swinging the nozzle head, wherein One or a plurality of nozzles for injecting high-pressure water onto the metal film of the optical disk before the step of injecting the high-pressure water onto the metal film of the optical disk during the conveyance of the optical disk conveyed by the conveying means A film peeling apparatus comprising a high-pressure water jetting apparatus. In the film peeling apparatus for peeling the metal film from the optical disk in which the metal film is formed on the surface of the resin material,
Conveying means for conveying the optical disc;
A nozzle head in which a plurality of nozzles for injecting high-pressure water onto a metal film of an optical disk transported by the transport means are arranged substantially linearly in a width direction orthogonal to a transport direction in which the transport means transports an optical disk, The distance between the nozzles at both ends in the width direction among the plurality of nozzles is substantially the same as the diameter of the optical disc, and the other nozzles of the plurality of nozzles are disposed at a predetermined interval between the nozzles at the both ends. Nozzle head,
As the maximum distance or more oscillating among distances between two adjacent nozzles among the plurality of nozzles are arranged in the nozzle head, and swinging means for swinging the nozzle head, wherein In the course of transporting the optical disk transported by the transport means, the plurality of nozzles has a scratch forming means for scratching the metal film of the optical disk before the step of spraying high-pressure water onto the metal film of the optical disk. A film peeling device. Disposing the nozzles at both ends in the width direction among the plurality of nozzles disposed in the nozzle head so that the nozzles are ejected obliquely from above toward the side surface of the optical disk being transported by the transport means. The film peeling apparatus according to claim 1 or 2, characterized in that:

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