KR20010104034A - making of adhesion method used centrifugal forece for D.V.D disc - Google Patents

Abstract

The present invention relates to a method for producing a centrifugal adhesive bonding of a DVD DISC, the injector is injected into the lower half disk 30 of the ejected DVD disk a certain amount of the injection of the adhesive material 11 from the external hydraulic pressure, the upper half disk ( 10) by lowering and contacting the lower half disk 30 to rotate at a predetermined number of revolutions so that the adhesive material 11 can be evenly distributed on the upper surface of the disk by the centrifugal force, the upper and lower half disk 30 bonded by the centrifugal force ) Is hardened by UV (ULTRA VIOLET) light in a state where it is maintained closely, thereby preventing gap formation by air layer in the combined two disks, thereby improving product quality.

Description

Making of adhesion method used centrifugal forece for D.V.D disc}

The present invention relates to a method for producing adhesive using centrifugal force of a DVD disc, and bonds the adhesive to the entire disc instantaneously by centrifugal force by rotating it at a constant speed without bonding after bonding the adhesive to two discs during DVD production. The present invention relates to a centrifugal force-adhesive manufacturing method of a DVD disk, which improves the quality of a product by preventing gap formation by an air layer in the two disks joined.

In general, the competition for technology of optical discs capable of recording and using various and vast data such as audio and video is intensifying.

Optical discs include CDs and DVDs that can be read-only, write once, and rewritable.

In the case of a compact disc (CD), the read-only type records signals for reproducing audio, video, etc. on the surface of the transparent substrate at 0.11 mu m, 0.4 mu m in width, and 0.83 to 3.56 mu m in length. In the case of a capable disc, grooves for signal recording or a pit indicating address information and disc characteristics are generally formed on the surface of a substrate, but video support discs (DVDs) can be provided according to a user's request for high quality and high sound quality. digital versatile disc).

DVD can store large capacity of 4GB or more, supports 720 ~ 480 resolution to realize high quality, and adopts DOLBY AC-3 to provide high quality sound and create a grand and realistic sound effect.

In addition, the DVD has a multi-language function that allows the user to create an audio environment in which up to 8 languages can be dubbed and 32 languages as subtitles. In addition to the multi-story feature that allows the story to be unfolded, it has semi-permanent storage, multi aspect, and multi angle that can change the angle of camera angle in real time.

Such a DVD is composed of two discs with a thickness of 0.6 mm using the same PC (POLYCARBONATE) as the CD, and can record data from 4.7GB to 9.4GB. The length is 0.4 mu m to 0.44 mu m, and at the same time, the track pitch is reduced to 0.74 mu m to record a substitute.

In addition, the DVD can maintain a processing speed of 3.49 m / s to 3.84 m / s. As a result, the amount of data that can be read per unit time increases.

On the other hand, the DVD reads the data engraved on the two disks by bonding the adhesive material on one disk and putting one disk on the disk so that two disks of 0.6 mm are combined to record a large amount of data. By processing the audio and video data read through the) to the desired video is played.

However, such a DVD bonds an adhesive to a lower disk to bond two disks, and then compresses and bonds another disk thereon. However, in this case, the adhesive bonded in the disk is not evenly distributed on the disk and is only partially distributed. Therefore, the gap is generated by the formation of an air layer on the portion where the adhesive is not bonded, which has a problem in that the quality of the product is degraded due to defective products.

The present invention is intended to solve such problems in the related art. The purpose of the present invention is to bond adhesives to two discs during DVD production, and then rotate them at a constant speed without compressing them so that the adhesives are bonded to the entire disc instantaneously by centrifugal force. This is to improve the quality of the product by preventing the gap formation by the air layer in the two disks combined.

1 is a partial perspective view of a centrifugal force using apparatus of a DVD disk according to an embodiment of the present invention.

Figure 2a, b, c is a block diagram of a method for manufacturing a DVD disk using a centrifugal force according to an embodiment of the present invention.

Code descriptions for the main parts of the drawings

10; upper half disk 11; adhesive material

12; injector 13; print layer

20; holder 30; lower half disk

S1 ~ S9; step

Hereinafter, the technical configuration of the present invention with reference to the accompanying drawings in detail.

The present invention relates to a process method for manufacturing a DVD disc, as shown in Figure 1 or 2a to 2c injection injection molding two half discs (half disc) for manufacturing to a predetermined thickness, respectively The process step (S1), and the cooling step (S2) for cooling the DVD disc ejected from the injection process step (S1) to a predetermined temperature and at the same time to remove foreign substances formed on the disc during the injection, and from the cooling step (S2) A holding step S3 for fixing the upper half disk 10 and the lower half disk 30 through the holding machine 20 so that each DVD disk can be combined; and a lower half from the holding step S3. Injecting step (S4) and the upper half disk 10 is lowered from the injection step (S4) and the injection step (S4) injecting the fixed liquid 11 from the external hydraulic pressure to the disk 30, the lower half disk 30 To come in contact with In the contact step (S5), and the lower disk and the upper half disk 10 from the contact step (S5) in contact with the rotating material at a predetermined rotational speed while filling the inside of the disk 11 by the centrifugal force Centrifugal force bonding step (S6) to be evenly distributed, and through the centrifugal force bonding step (S6) hardening to be cured by UV (ULTRA VIOLET) light in the state in which the upper and lower half disk 30 is closely maintained Step (S7), the surface inspection step (S8) for checking the data loss and the occurrence of surface abnormality of each disk closely adhered from the curing step (S7), and the disk inspected from the surface inspection step (S8) It has a configuration consisting of a marking step (S9) to complete the complete product by applying a printing layer 13, such as the label surface title is printed on the upper surface of the upper half of the disk (10).

Referring to the effects of the present invention configured as described in detail as follows.

The present invention relates to a process method for manufacturing a DVD disk, as shown in the injection molding to a thickness of about 0.6mm through a molding machine to be molded by molding two DVD stampers having a thickness to a certain thickness as shown in the figure Thus, two DVD disks are formed (S1).

At this time, the injection-molded DVD disc is placed in a cooler to cool the heat heated on the surface to a certain temperature during the injection process, and removes impurities through a HEPA (high efficiency particulate arrestance) filter so that impurities generated during injection do not stick to the surface. In addition, a reflective film is coated on the surface of the disk to prevent data errors and data from being read due to light deflection by the laser (S2).

As described above, the upper disk is attached to the upper part of the holding machine 20 coated with the reflective film, and the lower disk is fitted to the lower part. At this time, the upper part and the lower part of the holding part 20 to which the upper lower half disk 30 is attached are rotated a predetermined number of times. While rotating to support the upper lower disk (S3).

Here, the holding machine 20 is when the injector connected to the side is moved to the lower half disk 30 by the hydraulic pressure and sprinkled a predetermined amount of the adhesive material 11 and then returned to its original state, the adhesive material 11 is the lower half disk 30. The centrifugal rotational force of the expansion on the surface is to be distributed (S4).

In addition, the holding machine 20 lowers the upper half disk 10 toward the lower half disk 30 so that the upper half disk 10 can be adhered to and supported by the upper portion of the lower half disk 30 (S5).

At this time, the lower disk to which the upper half disk 10 is bonded may be gradually distributed in a predetermined number of revolutions in accordance with the rotation direction of the holding machine 20 so that the adhesive material may be distributed on the entire surface while the adhesive material is diffused by the centrifugal rotational force of the lower half disk 30. It is to be (S6).

On the other hand, the upper half disk 10 and the lower half disk 30 of the DVD are centrifugal rotation, and the adhesive material 11 distributed on the entire surface of the adhesive surface is hardened, so that the upper half disk 10 and the lower half disk 30 are external. In order to prevent the foreign substances from entering through the gap or the impact from the outside of the UV light is transmitted to the adhesive material 11 to the curing of the adhesive material (11) (S7)

The DVD disk, which has been cured by the adhesive material 11, classifies the good and defective products by determining the bonding state of the surface that may occur during the curing and centrifugal force bonding process, that is, the electronic characteristics and the birefringence or the file format state (S8).

At this time, the DVD disk determined to be a good product is disposed of and the good DVD disk is printed on the part or the front surface of the upper half disk 10 so that the type and company of the product can be printed so that the consumer can easily know what the product is. (13) by applying so that the user can know the applied picture or text (S9).

The present invention, which works as described above, bonds adhesives to two discs during DVD production, and then rotates them at a constant speed without compressing them so that the adhesive material is bonded to the entire disc instantaneously by centrifugal force so that there is a gap between the two discs. It has the effect of preventing formation beforehand and improving the quality of the product.

Claims (1)

Injection process step (S1) for molding by molding two DVD stampers (stamper) each to a predetermined thickness, and cooling the DVD disc injected from the injection process step (S1) to a predetermined temperature and at the same time Cooling step (S2) to remove the foreign matter formed, and the upper half disk 10 and the lower half disk 30 through the holding machine 20 so that each DVD disk from the cooling step (S2) can be combined, respectively. Holding step (S3) to fix the position, the injection step (S4) and the injection step (S4) in which the injector is injected into the lower half disk 30 from the holding step (S3) a predetermined liquid from the external hydraulic pressure Contact step (S5) so that the upper half disk 10 is lowered to come into contact with the lower half disk (30), and the lower disk and the upper half disk 10 in contact with the contact step (S5) Inside rotates at constant speed Centrifugal force bonding step (S6) to be evenly distributed on the upper surface of the disk by the centrifugal force and the upper and lower half disk (30) through the centrifugal force bonding step (S6) closely maintained UV ( ULTRA VIOLET) a curing step (S7) to be cured by light, and a surface inspection step (S8) to check the data loss and the occurrence of surface abnormality of each disk closely bonded from the curing step (S7) and Marking step (S9) of completing the complete product by applying a printing layer 13, such as a label title is printed on the upper surface of the upper half disk 10 of the disk inspected from the surface inspection step (S8) Centrifugal force adhesion manufacturing method of the DVD disk included.