JP2003238209A - Surface washing-modifying device and surface washing- modifying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for surface washing-modifying of an optical lens for achieving surface treatment with no defects in appearance by a simple and easy way. <P>SOLUTION: When an optical lens 1 is ground under rotation with a surface abrasion member 9 while discharging a liquid 12 containing a dispersed abrasive to the surface of the lens 1, on the side of the lens 1 opposite to the side to which the liquid 3 is discharged, a tubular structure 6 is disposed in such a way as to surround a rotating shaft 4 of the lens 1 as a splash preventing means to prevent spattering, sticking, splashing and sneaking of the liquid to the side of the lens 1 opposite to the side to which the liquid 3 is discharged. A gas such as air is blown into the tubular structure 6 to pressurize the air between the structure 6 and the lens 1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface cleaning / modifying apparatus and a surface cleaning / modifying method for optical lens surfaces such as spectacle lenses.

[0002]

2. Description of the Related Art In optical lenses such as lenses, a surface cleaning in which an optical lens is worn by a surface wear member while rotating the optical lens and discharging a liquid in which an abrasive is dispersed on the surface of the optical lens. The conversion / modification process is an indispensable pretreatment for surface processing.

[0003]

However, the conventional cleaning / modifying process for the surface of the optical lens has the following problems.

When the polishing liquid is discharged to the surface of the lens or the like and is worn, the coating liquid wraps around to the opposite surface, and the coating liquid, which is scattered by the rotation of the lens or the like and is atomized, adheres to the opposite surface. In addition, it is inevitable that the appearance of a poor appearance due to the adhesion and contamination of the coating liquid on the opposite surface, which should not adhere, such as the adhesion of the scattered liquid to the opposite surface due to the splashing on the inner wall of the tank. Further, there is a problem in that the polishing liquid that has flown around to the opposite surface solidifies and scatters to lower the dustproofness and cause various appearance defects.

Contamination on the opposite surface is a fatal defect especially for optical lenses.

Since the conventional technology has such a problem,
It was difficult to maintain a high yield of high-quality surface treatment without appearance defects.

Therefore, the present invention is intended to solve such a problem, and an object thereof is to provide a surface cleaning / modifying apparatus and a surface cleaning / modifying apparatus capable of performing a surface treatment without a defect in appearance by a simple method. It is in the process of providing a method.

[0008]

The surface cleaning / modifying apparatus of the present invention uses a surface wear member to rotate an optical lens while discharging a liquid in which an abrasive is dispersed on the surface of the optical lens. In a surface cleaning / modifying device that wears the optical lens, liquid splashes, adheres, rebounds, and wraps around the surface opposite to the surface on which the liquid is discharged. As a liquid splash prevention means for preventing such as the above, a cylindrical structure is provided so as to surround the rotation axis of the optical lens, and the air between the cylindrical structure and the optical lens is used for pressurization. In this way, a gas such as air is sent into the inside of the tubular structure.

Further, the surface cleaning / modifying method of the present invention uses the surface abrasion member while rotating the optical lens fixed to the rotary shaft and discharging the liquid in which the abrasive is dispersed on the surface of the optical lens. When the optical lens is worn, a cylindrical structure is provided so as to surround the rotation axis of the optical lens,
Further, by sending a gas such as air into the inside of the cylindrical structure so that the air between the cylindrical structure and the optical lens is pressurized, the surface opposite to the surface on which the liquid is ejected. It prevents the liquid from splashing, adhering, splashing, and getting around.

[0010]

According to the present invention, by forming the cylindrical structure surrounding the rotation axis of the optical lens, the air flow circling from the liquid application surface to the opposite surface generated by the rotation of the optical lens is blocked, It is possible to prevent the atomized liquid from scattering and adhering to the opposite surface by riding on the air flow. or,
By rotating an object such as a lens, the scattered liquid can be prevented from splashing on the inner wall of the tank and adhering to the opposite surface.

Further, air or the like is fed into the cylindrical structure between the cylindrical structure and the lens to pressurize the cylindrical structure,
Because the airflow is always generated from the direction of the rotation axis to the outside,
Not only does the effect of preventing liquid from splashing and adhering to the opposite surface increase, but it also prevents the liquid on the application surface from wrapping around the end surface of the lens or other parts and reaching the opposite surface. realizable.

As described above, the cylindrical structure may be of any shape as long as it blocks the air flow that circulates toward the surface opposite to the liquid application surface such as a lens, but in many cases it is a cylindrical shape. Is desirable.

The gas fed into the tubular structure for pressurizing is not limited to air but may be an inert gas such as N ₂ or Ar.

[0014]

Embodiments of the present invention will be described below with reference to the drawings, but the invention is not limited thereto.

FIG. 1 is a sectional view of a plastic lens surface cleaning / modifying apparatus in this embodiment.

The optical lens is fixed by the fixing / rotating member 4 at position 1. Thermal compression polyurethane foam (trade name "Maltprene SI20" manufactured by Hayashi Felt Co., Ltd.) as the surface wear member 9 has an outer diameter of 68 mm and an inner diameter of 2
It is molded into a hollow cylindrical shape having a width of 7 mm and a width of 25 mm, and is set on the rotary shaft 10 so that the outer surface of the cylinder is pressed against the surface of an object such as a lens set at the position 1. Further, the surface wear member 9 is designed to be rotatable in the B direction about the rotation shaft 10, and the surface wear member 9 together with the liquid discharge nozzle 11 is the geometric center (rotation center) of an object such as a lens.
To the outer peripheral portion in the direction A.
The liquid splash prevention member 6 has a cylindrical shape surrounding the fixed / rotating member 4, and air is sent into the liquid splash prevention member 6 by a tube 7.
In the figure, 8 indicates the flow of air sent into the liquid splash prevention member 6.

Reference numeral 12 denotes a discharge liquid discharged from the liquid discharge nozzle 11. The surface was abraded under the following conditions using the above apparatus.

1 plastic spectacle lens (CR39)
It was fixed to the suction adsorption member 4 at the position of and was rotated at 500 rpm. Next, the alumina-based polishing liquid 1 is supplied from the liquid discharge nozzle 11 to the surface wear member 9 rotating at 120 rpm while sending air into the liquid splash prevention member 6 through the tube 7.
2 (Fujimi Abrasive Industry Co., Ltd., trade name "POLIPL
A103 ") is discharged at 8 cc / min, and the surface polishing member 9 is pressed against the plastic lens surface with a load of 1.5 kg.
It was moved at m / sec. Rinse the lens under the following conditions using the device having the same structure under the following conditions,
It was dried. The lens rotation speed, the wear member rotation speed, the wear member moving speed, and the wear member pressing load were set to the same conditions as when the surface was worn. However, 1 pure water is discharged from the liquid discharge nozzle 11.
It was discharged at 1 / min to remove the abrasive on the surface of the plastic lens. Next, apply 2c of IPA to the plastic lens surface.
After the ejection of c, the number of rotations of the lens was increased to 2000 rpm, and it was held for 5 seconds to be dried. The surface of the obtained cleaned / modified lens was innumerable fine scratches, but no sneaking of an abrasive or the like to the opposite surface, scattering, adhesion and the like were observed at all.

The obtained cleaned / modified lens was hard-coated as follows.

FIG. 2 is a sectional view of the plastic lens surface treatment apparatus. An object such as a lens is set on the fixed / rotating member 4 at the position 1, and the liquid 3 is ejected from the liquid ejection port 2.

The liquid splash preventing member 6 has a cylindrical shape surrounding the fixed / rotating member 4, and air can be sent into the liquid splash preventing member 6 by a tube 7. In the figure, 8 indicates the flow of air sent into the liquid splash prevention member 6.

A plastic lens (CR39) washed with acetone is set in position 1 and fixed / rotated member 4
After fixing to, they were spun at 500 rpm. Then, the hard coat liquid 3 was discharged from the liquid discharge port 2 while sending air into the liquid splash prevention member 6 through the tube 7. After the hard coat liquid 3 was applied to the entire surface of the plastic lens at the position 1, the number of rotations of the plastic lens 1 and the fixed / rotating member 4 was increased to 2000 rpm, and after holding for 0.5 seconds, it was immediately stopped. After taking out the plastic lens from the fixed / rotating member 4, it was cured at 135 ° C. for 1.5 hours.

The coating liquid was prepared as follows.

In a reaction vessel equipped with a stirrer, 480 g of 2-butoxyethanol, 252 g of colloidal silica dispersed with 2-methoxyethanol (Catalyst Chemical Co., Ltd., trade name "Oscar 1832"), γ-glycidoxypropyl. Methoxysilane 108 g, flow control agent 0.
After adding 3 g and 30 g of 0.05N hydrochloric acid aqueous solution and stirring, 24
Left for hours. After that, 118 g of Denacol EX313 (manufactured by Nagase Kasei Co., Ltd.) and 5.67 of magnesium perchlorate
g and 1.35 g of a UV absorber were added and stirred for 2 hours. After that, the pH adjustment liquid prepared by mixing with Waoh / ethanol = 1/100 (ml) had a pH of 6 to 7
17.5 times, and stirred to obtain a coating liquid.

The quality of the hard coat coated surface was evaluated by the following method.

Abrasion resistance: The surface of the hard coat lens was rubbed 1000 times with a cloth (cotton) under a load of 1 kg. The evaluation was performed by classifying it into the following three stages according to the condition of scratches. A: There is no scratch. B: 1 to 10 thin scratches. C: Countless fine scratches.

Adhesion: After being immersed in pure water at 37 ° C. for 1 week, the adhesion of the coat film was examined. JIS / D-020
According to 2, the cross-cut tape test was performed. That is, using a knife, cuts are made on the surface of the substrate at intervals of 1 mm to form a grid of 1 mm ² . Then, a cellophane adhesive tape (manufactured by Nitto Kagaku Co., Ltd.) was strongly pressed on it, and after pulling and peeling abruptly in the direction of 90 degrees from the surface, the squares on which the coat film remained was used as an index of adhesion.

The wear resistance of the obtained lens was A rank, and the adhesion was 100.

[0029]

As described above, according to the method of the present invention, by forming the cylindrical structure surrounding the rotation axis of the optical lens, the liquid application surface generated by the rotation of the optical lens is formed. It is possible to block the air flow that wraps around to the opposite surface, and to prevent the atomized liquid from scattering and adhering to the opposite surface by riding on the air flow. Further, it is possible to prevent the splashed liquid from splashing on the inner wall of the tank and adhering to the opposite surface by rotating the optical lens.

Furthermore, by injecting air or the like between the cylindrical structure and the optical lens to apply pressure, an air flow is always generated from the direction of the rotation axis toward the outside, so that the liquid is scattered and adheres to the opposite surface. Not only can the prevention effect be enhanced, but the liquid on the coating surface can be prevented from wrapping around the end surface of the lens or the like and reaching the opposite surface, and high-quality surface treatment can be realized with high yield.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a surface cleaning / modifying device for a plastic lens according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a plastic lens surface treatment apparatus according to an embodiment of the present invention.

[Explanation of symbols]

1: set position such as lens, 2: liquid ejection port, 3: liquid,
4: rotating member, 6: liquid splash preventing member, 7: tube,
8: Air flow, 9: Surface wear member, 10: Rotating shaft, 1
1: liquid discharge nozzle, 12: discharge liquid, A: moving direction of surface wear member, B: rotating direction of surface wear member

Claims (3)

[Claims] 1. A surface cleaning / modifying apparatus for abrading an optical lens with a surface abrasion member while ejecting a liquid in which an abrasive is dispersed on the surface of the optical lens while rotating the optical lens. On the surface opposite to the surface on which the liquid is ejected, as a liquid splash preventing means for preventing the liquid from splashing, adhering, splashing or wrapping around the surface opposite to the surface on which the liquid is ejected, A cylindrical structure is provided so as to surround the rotation axis of the optical lens, and a gas such as air is introduced into the cylindrical structure so that the air between the cylindrical structure and the optical lens is pressurized. A surface cleaning and reforming device characterized by being sent in. 2. The surface cleaning / reforming apparatus according to claim 1, wherein the cylindrical structure is cylindrical. 3. When the optical lens fixed to the rotating shaft is rotated and the liquid in which the abrasive is dispersed is discharged onto the surface of the optical lens while the optical lens is worn by the surface wear member, A cylindrical structure is provided so as to surround the rotation axis of the optical lens, and a gas such as air is supplied to the inside of the cylindrical structure so that air between the cylindrical structure and the optical lens is pressurized. The surface cleaning / reforming method is characterized in that the liquid is prevented from splashing, adhering, splashing, and wrapping around the surface opposite to the surface on which the liquid is discharged.