A circular lens screen printing surface coating device and method

Abstract

The present invention provides a device and method for coating the screen printing surface of a circular lens, which belongs to the field of vacuum coating technology. The device for coating the screen printing surface of a circular lens specifically includes a fixture kit, a shielding steel sheet, and a magnetic suction component. The magnetic suction component is detachably mounted on the fixture kit, and the circular lens to be coated is fixed on the fixture kit. The magnetic suction component is located on the back side of the circular lens to be coated, and the shielding steel sheet is placed on the front side of the circular lens to be coated, and is fixed to the front side of the circular lens to be coated under the action of the magnetic suction component. The processing scheme of the present application improves the coating quality, and has obvious economic and practical value for mass production of coating.

Description

Technical Field

[0001] The present invention relates to the technical field of optical coating, and in particular to a device and method for coating a silk-screen surface of a circular lens. Background Art

[0002] Vacuum coating is a common method in the production process of round glass lenses. In order to achieve local coating, the lens needs to be shielded. In the existing shielding scheme, local coating is achieved by using a shielding protective film that is cut to the required shape. The coating process is carried out at high temperature (140°C) and in a vacuum environment. During the coating process, the shielding protective film releases air on the surface of the lens, and the protective film warps, resulting in uneven coating film thickness and low coating yield.

[0003] like Figure 1 As shown, the shielding protective film 2 has a silk-screen pattern on the surface of the glass to be plated, and the dyne value of the silk-screen surface is about 36, and the adhesion to the glass is poor. When the coating is in a vacuum and high temperature environment, the protective film will warp.

[0004] like Figure 2 As shown, during the coating process, the coating fixture rotates around the axis in the vacuum chamber, yt = (h / a)*β*rt, where the movement speed of the coating material is a, the axial movement angular velocity of the coating umbrella is β, the warping height of the protective film is h, y is the circumferential offset of the coating material from the glass surface to the top of the shielding, t is the coating shielding reserve, and when y>t, the product is unqualified and cannot form a film layer of qualified thickness in the effective area, that is, the warping height h seriously affects the coating quality.

[0005] Therefore, there is an urgent need in the art for a shielding method with simple structure and high efficiency. Summary of the invention

[0006] Therefore, in order to overcome the shortcomings of the above-mentioned prior art, namely, during the process of ultra-low reflection coating on a local position of the circular protective lens, the circular lens will rotate in the jig and it is impossible to perform local shielding through the jig structure, the present invention discloses a structural design that can solve the shielding problem at a low cost and with high efficiency.

[0007] In the first aspect, the present application provides a device for coating the screen printing surface of a circular lens, the device comprising: a fixture kit, a shielding steel sheet and a magnetic suction component, the magnetic suction component is detachably mounted on the fixture kit, the circular lens to be coated is fixed on the fixture kit, the magnetic suction component is located on the back side of the circular lens to be coated, the shielding steel sheet is placed on the front side of the circular lens to be coated, and is fixed to the front side of the circular lens to be coated under the action of the magnetic suction component. The present invention uses a steel sheet as a shielding object, so there are no problems such as warping, deformation, and degassing during the coating process, and the uniform thickness of the film layer during the coating process can be ensured, and the vacuum system will not be polluted, and the life of the vacuum system can be extended. Because the steel sheet can be reused, it has obvious economic value and practical value for mass production of coating. In addition, because the shielding steel sheet can generate suction with the magnetic suction component, there is friction between the shielding steel sheet and the circular lens to be coated, and the two will not rotate relative to each other.

[0008] In one implementation of the first aspect, the magnetic attraction assembly includes a magnet and a magnet seat, the magnet seat is fixed to the clamp kit, and the magnet is installed in the magnet seat.

[0009] In one embodiment of the first aspect, the magnet is interference-mounted in the magnet seat. Since the fixture kit is in a high-speed rotating state during the coating process, this arrangement can ensure that the magnet will not fall off from the magnet seat during the coating process, thereby causing the disappearance of magnetic force and affecting the quality of the coating.

[0010] In one implementation of the first aspect, the magnet seat is a polytetrafluoroethylene magnet seat.

[0011] In an implementation manner of the first aspect, the shielding steel sheet is provided with a plurality of through holes, and the positions of the through holes match the positions of the silk-screen inner holes in the circular lens to be film-attached.

[0012] In one implementation of the first aspect, the shielding steel sheet is made of 1Cr13, which is not easy to rust, has good stability, and can be reused.

[0013] In a second aspect, the present application also provides a method for coating a silk-screen surface of a circular lens, the coating method comprising the following steps:

[0014] (1) fixing the circular lens to be film-coated on the fixture kit, and cleaning the surface of the circular lens to be film-coated;

[0015] (2) placing a shielding steel sheet in front of the circular lens to be coated, and making the through hole on the shielding steel sheet coincide with the axis of the silk-screen inner hole in the circular lens to be coated;

[0016] (3) Install the magnetic suction assembly so that the shielding steel sheet and the circular lens to be filmed remain fixed;

[0017] (4) Place the fixture kit in the coating fixture and start coating.

[0018] Compared with the prior art, the advantages of the present invention are: the present application uses stainless steel sheets as shielding objects, and there are no problems such as warping, deformation, and degassing. It can ensure the uniform thickness of the film layer during the coating process, and will not pollute the vacuum system, thereby extending the life of the vacuum system. Because the shielding steel sheets can be reused, it has obvious economic and practical value for mass production of coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the traditional coating shielding solution;

[0021] Figure 2 It is a schematic diagram of the effect of masking film warping on the coating process;

[0022] Figure 3 is a schematic structural diagram of a film coating device in an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of assembling a shielding steel sheet and a circular lens to be film-coated in an embodiment of the present invention.

[0024] In the above drawings, 1 is a clamp kit, 2 is a shielding protective film, 3 is a circular lens to be coated, 4 is a coating surface; 5 is a shielding steel sheet; 6 is a magnet, 7 is a magnet seat, and 8 is a through hole.

[0025] Beneficial Effects

[0026] The magnetic stainless steel sheet of this structure can be reused, and there is no warping, deformation, degassing and other problems in the coating process of the metal magnetic stainless steel sheet. It can ensure the uniform thickness of the film layer in the coating process, and will not pollute the vacuum system, thereby extending the life of the vacuum system. Because the steel sheet can be reused, it has obvious economic and practical value for mass production of coating. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] The following describes the implementation methods of the present application through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0029] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0030] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0031] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0032] The present application embodiment provides a novel structure of a circular lens coating shielding solution, such as Figure 3 As shown: it includes a fixture kit 1, a circular lens to be filmed 3, a magnet 6, a magnet seat 7, and a shielding steel sheet 5. The magnet seat 7 is made of polytetrafluoroethylene, and the shielding steel sheet 5 is made of 1Cr13 stainless steel.

[0033] Among them, the magnet 6 and the magnet seat 7 are assembled into a magnet assembly through interference fit. After the appearance of the circular lens 3 to be filmed is cleaned, the shielding steel sheet 5 and the circular lens 3 to be filmed are manually positioned by the hole distance, such as Figure 4As shown, the through hole 8 of the shielding steel sheet 5 and the center of the screen-printed inner hole of the circular lens 3 to be coated are overlapped. Then, a magnet 6 is placed in the magnet seat 7, and the magnet seat 7 is set on the other side of the circular lens 3 to be coated. At this time, the shielding steel sheet 5 and the magnet 6 generate suction, so that there is friction between the circular lens 3 to be coated and the shielding steel sheet 5, and they will not rotate relative to each other. Finally, the fixture kit is placed in a coating jig for coating operation.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A circular lens screen printing surface coating device, characterized in that: The device includes: a clamp kit, a shielding steel sheet and a magnetic component. The magnetic component is detachably mounted on the clamp kit. The circular lens to be filmed is fixed on the clamp kit. The magnetic component is located on the back side of the circular lens to be filmed. The shielding steel sheet is placed on the front side of the circular lens to be filmed and is kept fixed to the front side of the circular lens to be filmed under the action of the magnetic component.

2. The circular lens screen printing surface coating device according to claim 1, characterized in that: The magnetic attraction assembly includes a magnet and a magnet seat, the magnet seat is fixed to the clamp kit, and the magnet is installed in the magnet seat.

3. The circular lens screen printing surface coating device according to claim 2, characterized in that: The magnet is interference-fitted in the magnet seat.

4. The circular lens screen printing surface coating device according to claim 2, characterized in that: The magnet seat is a polytetrafluoroethylene magnet seat.

5. The circular lens screen printing surface coating device according to claim 1, characterized in that: The shielding steel sheet is provided with a plurality of through holes, and the positions of the through holes match the positions of the silk-screen inner holes in the circular lens to be film-attached.

6. The circular lens screen printing surface coating device according to claim 1, characterized in that: The material of the shielding steel sheet is 1Cr13.

7. A method for coating a silk-screen surface of a circular lens using the coating device as claimed in any one of claims 1 to 6, characterized in that: The coating method comprises the following steps: (1) fixing the circular lens to be film-coated on the fixture kit, and cleaning the surface of the circular lens to be film-coated; (2) placing a shielding steel sheet in front of the circular lens to be coated, and making the through hole on the shielding steel sheet coincide with the axis of the silk-screen inner hole in the circular lens to be coated; (3) Install the magnetic suction assembly so that the shielding steel sheet and the circular lens to be filmed remain fixed; (4) Place the fixture kit in the coating fixture and start coating.

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