JPH11339333A - Thin disk pasting device and manufacture of thin disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability of a thin disk processing device, to prevent variations from occurring in thin disk cementing operation, and further, to improve an adhesive property of a thin disk as a product, by heating pressure air in an autoclave when thin disks for a optical disk are pasted by pressurizing them. SOLUTION: One of two thin disks 9 is automatically placed on a table 3 for the thin disk at a position of a thin disk feeding device 2 fixed on a turntable 1, and automatic feeding of a thin disk 9 is repeated by turning the turntable 1. This table 3 is warmed by pressure air heated in the autoclave 7, and so the thin disk 9 placed thereon is also to be warmed up. An adhesive applied on a seat is transferred to the thin disk 9 by rotating the turntable 1, pressing in the outer circumferential direction from the center part, and preventing the softened adhesive from involving the air in the part to be pasted. After that, the thin disk feeding device 5 places one of other thin disks 9 onto the adhesive applying plane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus for bonding two thin disks and a method for manufacturing a thin disk using the same. More specifically, the present invention relates to a manufacturing apparatus which is applied to a method for bonding molded articles of a high-density optical disk and has improved bonding properties of a thin-walled disk with an adhesive, and a method for manufacturing a thin-walled disk for a high-density optical disk used therein. It is.

[0002]

2. Description of the Related Art At present, generally, a method of bonding two thin disks to a high-density optical disk molded product is used.

[0003] As one of such thin disk manufacturing apparatuses for high density optical disks, an adhesive is applied or stuck to one of two thin disks on a turntable for molding a desired high density optical disk. There is a device that puts another one on top of it and presses it to bond high-density optical disks together.

Normally, in such a bonding apparatus, one of the two thin disks is set on a turntable, and the turntable is rotated, and the adhesive is applied at a fixed position. This is an apparatus for producing a bonded product of a high-density optical disk by performing coating and pasting, further laminating another sheet thereon, pressing, and pressurizing with an autoclave.

FIG. 3 shows an example of an apparatus for bonding a thin disk of a high-density optical disk. The laminating apparatus is first automatically supplied from a thin-walled disk supply device 2 fixed on the turntable 1 to a table 3 on the turntable, and the automatic supply is repeated by rotating the turntable 1.

Next, the turntable 1 is rotated, and the table 3 of the thin-walled disk is moved to the adhesive bonding device 4.
The adhesive is applied to the thin disk with the device. As a method for applying the adhesive, there is a method of applying the adhesive directly on the disk, a method of transferring the adhesive applied on the sheet to the thin disk with a hemispherical rubber, and the like.

Next, the turntable 1 is rotated, and at the next station, another thin disk 9 ′ is placed on the adhesive applied surface from the thin disk supply device 5, and the turntable 1 is further rotated. The two thin disks 9, 9 'which are superimposed in the above are pressed with a hemispherical rubber by an air cylinder pressure, and the thin disks are bonded together so that air is pushed out from the inner peripheral portion to the outer peripheral portion. The turntable 1 is rotated to transfer the thin disks 9 and 9 ′ thus bonded to the autoclave 7.

Then, compressed air is supplied into the autoclave 7, and a pressure of about 1 ton is applied to the autoclave 7 so that the thin disks 9, 9 'are evenly distributed.
Is pressed to make the bonding state of both of them more uniform, and the turntable 1 is further rotated to take out the product 11.

[0009]

Conventionally, the present manufacturing apparatus is installed in order to soften the adhesive when applying or affixing an adhesive on a thin disk and to improve the state of bonding between the thin disks. Means are set to set a higher room temperature. As another means, a method of blowing hot air or the like to an installation site of the turntable has been adopted.

However, raising the room temperature deteriorates the working environment in the room and is not preferable in terms of energy saving. Also, the method of sending hot air has a problem in maintenance work to be carried out for each trouble, and furthermore, malfunctions of detectors and the like installed in the apparatus frequently occur, and there is a problem in durability. Therefore, in such a method, it is difficult to perform continuous operation of the device.

In order to solve this problem, improvements in adhesives and bonding methods have been made. However, although there are partial improvements, the dispersion is large and not perfect, and the adhesiveness and air quality are poor. Problems such as entanglement cannot be improved.

[0012]

Means for Solving the Problems The inventors of the present invention have made intensive studies and have found that by heating pressurized air in an autoclave, the adhesiveness of a thin-walled disc is greatly improved. .

That is, the present invention is an apparatus for continuously bonding two thin disks for an optical disk by applying pressure to the autoclave by an autoclave, comprising means for supplying heated pressurized air to the autoclave. The present invention is to provide a thin-walled disc laminating apparatus to be used.

Further, the present invention is characterized in that the temperature of the pressurized air is 30 to 80 ° C., and further comprises a means for heating the autoclave. Another object of the present invention is to provide a thin-walled disc bonding apparatus in which five or more discs are installed on a conveyor and the table is automatically moved to the autoclave to continuously bond thin-walled discs.

The present invention also relates to a method of manufacturing a thin disk for an optical disk, wherein two thin disks are continuously bonded by pressurized air on a turntable or a conveyor.
It is an object of the present invention to provide a method for producing a thin disk, wherein the temperature of the pressurized air is 30 to 80 ° C., and the mounting table of the thin disk is heated by the pressurized air. In particular, the outer diameter is 30 to 300 mm, and the thickness is 0.2 mm to 1.
An object of the present invention is to provide a method for producing a thin disk having a thickness of 5 mm, particularly a thin disk made of acrylic, polycarbonate, epoxy, amorphous olefin resin, a copolymer thereof, or inorganic glass.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The thin disk laminating apparatus according to the present invention comprises the steps of placing one of two thin disks on a table of thin disks continuously heated on a turntable and applying an adhesive. Is applied or affixed, and then the other one is placed on an adhesive, and further pressed to form a high-density optical disk.

By heating the air at the time of pressurizing, the adhesive is softened, and at the same time, the mounting table of the thin disk is heated, so that the adhesive at the time of bonding is further softened. As a result, the entrainment of air and the bonding property of the adhesive in the form of streaks are greatly improved, and a high-density optical disk having excellent mechanical properties can be manufactured.

For example, FIG. 1 relating to the thin disk laminating apparatus of the present invention is based on a turntable system, and two thin disks 9 are placed at the position of the fixed thin disk supply device 2 on the turntable 1. One of the turntable 1
The automatic supply of the thin disk 9 is repeated by automatically installing the thin disk 9 on the table 3 and rotating the turntable 1. The mounting table 3 is heated by pressurized air heated in the autoclave 7,
The temperature of the thin disk 9 placed thereon is also raised.

Such an autoclave may be further provided with a separate heating device in addition to the heated pressurized air.

Further, the turntable 1 is rotated, and the adhesive 10 applied on the sheet is softened by pressing the adhesive 10 applied on the sheet from the center of the thin disk to the outer periphery from the center of the thin disk using a hemispherical rubber. The adhesive 10 is transferred to the thin-walled disc 9 while preventing the adhesive 10 from entraining air into the sticking portion.

Thereafter, the turntable 1 is further rotated, and one of the other thin disks 9 'is placed on the adhesive-coated surface by the thin disk supply device 5, and then the tar table 1 is moved. The thin disks 9 are bonded together by pressing the two thin disks 9 overlaid with hemispherical rubber so that air is pushed out from the inner periphery to the outer periphery.

The thin disks 9 and 9 'thus bonded are rotated to a turntable and transferred to the next autoclave 7,
The outer wall of the autoclave 7 is lowered by the cylinder 8,
Thereafter, the thin disk 9 is evenly pressurized with the pressure of the heated air of about 1 ton, and at the same time, the adhesive 10 is further softened by the heated air to make the state of the bonded portion more uniform.

Finally, the turntable 1 is moved, and the bonded product 11 is supplied and removed from the thin disk 9 by the thin disk supply device 2.

The temperature of the air to be injected into the autoclave 7 to improve the bonding state when the two thin disks 9 are bonded to each other will be described in more detail.
The detector 14 is controlled by a controller 13 which can freely change the temperature between 2 and 30 to 80 ° C. The adhesive for sandwiching the two thin disks 9 by this heated air 10 can be softened and uniformly bonded, and at the same time, the thin disk table 3 can be continuously heated at that temperature. Thereafter, the thin disk 9 installed on the thin disk 9 is heated, and the adhesive 10 is heated. Softening is promoted, air entrapment or streaking during bonding can be greatly reduced, and a high-density optical disk having excellent mechanical properties can be provided.

The heated high-density optical disc taken out after bonding is cooled in the product take-out section, and the temperature change causes the adhesive to harden and the bonding state becomes good.

The mechanism shown in FIG. 2 is a conveyor-type thin disk laminating apparatus. That is, the mounting table of the thin disk installed on the conveyor corresponds to the mounting table installed on the turntable shown in FIG. 1, and hereinafter, supply of the thin disk, application and sticking of the adhesive, and further other A single thin-walled disc is stacked, and the process from pressurization to removal as a product is straightened from circular to straight, and the operation of each device is exactly the same.

When the apparatus shown in FIGS. 1 and 2 is operated, it takes time to make the temperature of the table of the thin disk constant, so that the temperature is raised in advance without any product at the time of startup or trouble. You need to keep it.

The high-density optical disk molded by the above two types of apparatus is excellent in bonding property and provides a suitable manufacturing apparatus.

The present invention is particularly applied to a high-density optical disk, and has an outer diameter of 30 to 300 mm and a thickness of 0.3 mm.
It is suitably used for the thin disk of 2 mm to 1.5 mm.
As the material, especially acrylic, polycarbonate,
Epoxy, amorphous olefin resin, or a copolymer thereof, or a thin disk of inorganic glass is suitably used for bonding.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, description will be made with reference to each embodiment of the present invention. First, a method for manufacturing a high-density optical disk thin-walled disk formed by the bonding apparatus according to the present invention will be described in detail.

[Example 1] Outer diameter 120 mm, thickness 0.6
A high-density optical disc of a lamination type was produced using a polycarbonate disc having a thickness of 1 mm and a turntable type apparatus shown in FIG. The bonding was performed by transferring the adhesive adhered to the polyester film in a circular shape to the disk by such a device.

The temperature of the pressurizing air to be injected into the autoclave installed on the turntable moving each station every 30 seconds is determined by the detector inside the heater.
The temperature is controlled by a controller so that the temperature becomes 0 ° C. The temperature of the two thin disks bonded to each other is raised by this air temperature and the adhesive is softened, so that the bonding state of the outer peripheral portion is better than before. Became.

The thin disk continuously supplied to the heated thin disk pedestal is rotated by the rotation of the turntable.
The temperature reached about 35 ° C. before the adhesive was applied, and when the adhesive was pressed from the sheet onto the thin disk and transferred to the thin disk, the adhesive softened and stuck uniformly on the thin disk.

As a result, the entire state after bonding is free of air entrainment, and a high-density optical disk having excellent mechanical properties can be formed, and a suitable bonding method has been realized.

Example 2 In the same apparatus as in Example 1, lamination was performed by applying an adhesive by setting the temperature of the pressurizing air of an autoclave set on a turntable to 70 ° C. As a result, the temperature of the mounting table of the thin disk when the adhesive is applied to the thin disk reaches 40 ° C.,
As in Example 1, a suitable high-density optical disk could be formed without the streak-like pattern of the adhesive and without air entanglement during bonding.

[0036]

As described above, according to the present invention, in a device using a turntable or a conveyor system, when two thin disks are bonded on a turntable or a conveyor by an apparatus for bonding two thin disks. By heating the pressurized air to 30 to 80 ° C, the adhesive to be bonded is softened, the sticking property is improved, and the curability after cooling is further promoted, and at the same time, the temperature of the mounting table of the thin disk is increased, By softening the adhesive at the time of application or pasting, the adhesiveness is improved, air entrainment or streaking is greatly reduced, and it is suitable for molding high density optical discs with excellent mechanical properties A manufacturing device was realized.

[Brief description of the drawings]

FIG. 1 is a plan view of a turntable type optical disc bonding / manufacturing apparatus of the present invention and a heating method thereof.

FIG. 2 is a plan view of a conveyor-type optical disc bonding / manufacturing apparatus of the present invention and a heating method thereof.

FIG. 3 is a plan view of a conventional turntable type optical disc bonding and manufacturing apparatus.

FIG. 4 is a cross-sectional view of a conventional autoclave.

[Explanation of symbols]

 1. Turntable 2. 2. Thin-walled disk feeder Table of thin disk ４． 4. Adhesive sticking device Thin disk supply device 6. 6. Thin disk pressing device Autoclave 8. Pressing cylinder 9. Thin disk 10. Adhesive 11. Products 12. Heater 13. Temperature controller 14. Detector

Claims (8)

[Claims] An apparatus for continuously bonding two thin disks for an optical disk by applying pressure by an autoclave, comprising means for supplying heated pressurized air to the autoclave. Laminating device. 2. The thin disk laminating apparatus according to claim 1, wherein the temperature of the pressurized air is 30 to 80 ° C. 3. The thin disk laminating apparatus according to claim 1, further comprising means for heating the autoclave. 4. The apparatus according to claim 1, wherein five or more thin disks are placed on a turntable or a conveyor, and the thin disks are continuously bonded to each other by automatically moving the mounting table to the autoclave. The thin disk laminating apparatus according to claim 1, wherein 5. A method for manufacturing a thin disk for an optical disk, wherein two thin disks are continuously bonded by a pressurized air on a turntable or a conveyor, wherein the temperature of the pressurized air is 30 to 80 ° C. And a step of heating the table of the thin disk by the pressurized air. 6. The thin-walled disk mounting table is installed on a turntable or a conveyor at least five times, and the mounting table is continuously heated by the pressurized air.
A method for producing the thin disk as described above. 7. An outer diameter of 30 to 300 mm and a thickness of 0.2
7. The method for producing a thin disk according to claim 6, wherein said thin disk having a thickness of 1.5 mm to 1.5 mm is bonded. 8. The method for producing a thin disk according to claim 5, wherein the thin disk is an acrylic, polycarbonate, epoxy, amorphous olefin resin, a copolymer thereof, or an inorganic glass. .