阅读说明：本技术 一种带金属层的遮光片结构及成型工艺 (Anti-dazzling screen structure with metal layer and forming process ) 是由 陈志刚 于 2021-03-02 设计创作，主要内容包括：本发明公开了一种带金属层的遮光片结构,具有圆形的片本体,片本体的中心设置有透光孔,所述片本体包括依次设置的第一遮光层、第一PET层、铜合金层、第二PET层和第二遮光层,所述透光孔的内壁设置为内凹形。本发明提供的一种带金属层的遮光片结构,该遮光片采用五层结构,再分别对铜合金层和第一PET层、第二PET层形成不同的内凹直径,这样,可以防止多余光线反射进入取景器内,提高成像质量,本发明提供的带金属层的遮光片成型工艺,该成型工艺通过三次成型,从而形成至少三个不同的内径的内壁,进而使成型的遮光片防止多余光线反射进入取景器内,提高成像质量,成型质量好,易于控制。(The invention discloses a light shading sheet structure with a metal layer, which is provided with a circular sheet body, wherein a light transmitting hole is formed in the center of the sheet body, the sheet body comprises a first light shading layer, a first PET layer, a copper alloy layer, a second PET layer and a second light shading layer which are sequentially arranged, and the inner wall of the light transmitting hole is inwards concave. The invention provides a light-shading sheet structure with a metal layer, which adopts a five-layer structure, and then forms different concave diameters on a copper alloy layer, a first PET layer and a second PET layer respectively, thus preventing redundant light from reflecting into a viewfinder and improving the imaging quality.)

1. The utility model provides a take anti-dazzling screen structure of metal level has the circular shape piece body, and the center of piece body is provided with light trap, its characterized in that: the piece body is including the first light shield layer, first PET layer, copper alloy layer, second PET layer and the second light shield layer that set gradually, the inner wall of light trap sets up to interior concavity.

2. The structure of claim 1, wherein: the inner diameters of the first light shielding layer and the second light shielding layer are D1, the inner diameters of the first PET layer and the second PET layer are D2, the inner diameter of the copper alloy layer is D3, and D1< D2< D3.

3. The structure of claim 1, wherein: the first shading layer and the second shading layer are ink layers.

4. A forming process of a light shielding sheet with a metal layer is characterized by comprising the following forming steps:

s1, coating a first PET layer on the upper surface of the copper alloy layer, and coating a second PET layer on the lower surface of the copper alloy layer;

s2, coating a first shading layer on the surface of the first PET layer, and coating a second shading layer on the surface of the second PET layer to form a shading belt;

s3, punching the shading tape to form a single shading sheet body;

s4, pre-punching the shading sheet body to form a fabrication hole;

s5, placing the shading sheet body in the solution to perform surface dissolving molding on the PET layer in the fabrication hole;

and S6, placing the light shielding sheet body in the electrolyte for electrolytic forming.

5. The forming process of the light shield with the metal layer as claimed in claim 4, wherein: in step S5, the solution is potassium hydroxide, sodium hydroxide, lithium hydroxide.

6. The forming process of the light shield with the metal layer as claimed in claim 4, wherein: the dissolving and forming comprises first forming, second forming and cleaning, wherein the concentration of a potassium hydroxide solution of the first forming is 50%, and the temperature is 40 ℃; and the concentration of the potassium hydroxide solution for the second forming is 40%, the temperature is 35 ℃, and the shading sheet body is subjected to residual cleaning after the second forming.

7. The forming process of the light shield with the metal layer as claimed in claim 4, wherein: the dissolving and forming comprises primary forming, secondary forming and cleaning, wherein the concentration of a sodium hydroxide solution for the primary forming is 35%, and the temperature is 40 ℃; and the concentration of the sodium hydroxide solution for the second forming is 30%, the temperature is 35 ℃, and the shading sheet body is subjected to residual cleaning after the second forming.

8. The forming process of the light shield with the metal layer as claimed in claim 4, wherein: the copper alloy layer is a copper-tin alloy, wherein the copper accounts for 80% and the tin accounts for 20%.

9. The forming process of the light shield with the metal layer as claimed in claim 8, wherein: the electrolytic forming is to place the shading sheet body as an anode into electrolyte, and the current density is controlled to be 180-200A/square meter.

10. The forming process of the light shield with the metal layer as claimed in claim 9, wherein: the electrolyte comprises water, sulfuric acid and copper sulfate, wherein the content of copper ions is 40-50 g/L, and the content of sulfuric acid is 180-200 g/L.

Technical Field

The invention relates to the technical field of optical device processing, in particular to a light shading sheet structure with a metal layer and a forming process.

Background

The light blocking sheet, also called as light blocking sheet, is used as a necessary light blocking element in the fields of cameras, mobile phone cameras and the like, aims to prevent stray light from entering a viewfinder to influence the imaging quality, is used for the light blocking sheet in the cameras, also called as a diaphragm, a light blocking ring, a mylar sheet and the like, and has the thickness of 0.025-0.012 mm generally, and a central hole of the light blocking sheet is a light through hole. In fact, the light rays are not always irradiated in parallel, and the light rays are crossed due to different intensities in the light rays, so that the side wall of the central hole always reflects the light and part of the light enters the imager further.

At present, in the field of anti-dazzling screens, a main core process is how to reduce the side wall reflection of a central hole, usually the central hole is punched, and then light absorption paint is sprayed in the central hole to absorb light and emit less light.

Disclosure of Invention

The invention aims to provide a light shading sheet structure with a metal layer and a molding process, the light shading sheet structure can greatly reduce light reflection to a viewfinder, and the molding process adopted by the light shading sheet with the metal layer is not only easy for batch molding, but also cannot influence the molding of an image head after long-time use.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a take anti-dazzling screen structure of metal level has the circular shape piece body, and the center of piece body is provided with the light trap, the piece body is including the first light shield layer, first PET layer, copper alloy layer, second PET layer and the second light shield layer that set gradually, the inner wall of light trap sets up to interior concavity.

Further, the inner diameters of the first light-shielding layer and the second light-shielding layer are D1, the inner diameters of the first PET layer, the second PET layer and the copper alloy layer are D2, the inner diameter of the copper alloy layer is D3, and D1< D2< D3.

Furthermore, the first shading layer and the second shading layer are ink layers.

The invention also provides a forming process of the light shielding sheet with the metal layer, which comprises the following forming steps:

s1, coating a first PET layer on the upper surface of the copper alloy layer, and coating a second PET layer on the lower surface of the copper alloy layer;

s2, coating a first shading layer on the surface of the first PET layer, and coating a second shading layer on the surface of the second PET layer to form a shading belt;

s3, punching the shading tape to form a single shading sheet body;

s4, pre-punching the shading sheet body to form a fabrication hole;

s5, placing the shading sheet body in the solution to perform surface dissolving molding on the PET layer in the fabrication hole;

and S6, placing the light shielding sheet body in the electrolyte for electrolytic forming.

In step S5, the solution is potassium hydroxide, sodium hydroxide, lithium hydroxide.

Preferably, the dissolving and forming comprises first forming, second forming and cleaning, wherein the concentration of the potassium hydroxide solution of the first forming is 50%, and the temperature is 40 ℃; and the concentration of the potassium hydroxide solution for the second forming is 40%, the temperature is 35 ℃, and the shading sheet body is subjected to residual cleaning after the second forming.

Preferably, the dissolving and forming comprises primary forming, secondary forming and cleaning, wherein the concentration of the sodium hydroxide solution of the primary forming is 35%, and the temperature is 40 ℃; and the concentration of the sodium hydroxide solution for the second forming is 30%, the temperature is 35 ℃, and the shading sheet body is subjected to residual cleaning after the second forming.

Further, the copper alloy layer is a copper-tin alloy, wherein the copper accounts for 80% and the tin accounts for 20%.

Preferably, the electrolytic forming is to place the shading sheet body as an anode into an electrolyte, and the current density is controlled to be 180-200A/square meter.

Furthermore, the electrolyte comprises water, sulfuric acid and copper sulfate, wherein the content of copper ions is 40-50 g/L, and the content of sulfuric acid is 180-200 g/L.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the structure of the light-shielding sheet with the metal layer, the light-shielding sheet adopts a five-layer structure, and different concave diameters are formed on the copper alloy layer, the first PET layer and the second PET layer respectively, so that redundant light rays can be prevented from being reflected into a viewfinder, and the imaging quality is improved;

2. according to the forming process of the light shading sheet with the metal layer, provided by the invention, the inner walls with at least three different inner diameters are formed through three times of forming, so that the formed light shading sheet can prevent redundant light rays from being reflected into a viewfinder, the imaging quality is improved, the forming quality is good, and the control is easy.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a reflection diagram of the optical path of the present invention.

Fig. 3 is a partial structural schematic diagram of the present invention.

In the figure: the light-transmitting sheet comprises a sheet body-1, a first shading layer-11, a first PET layer-12, a copper alloy layer-13, a second PET layer-14, a second shading layer-15 and a light-transmitting hole-2.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the light-shielding sheet structure with a metal layer provided by the present invention includes a circular sheet body 1, a light hole 2 is formed in the center of the sheet body 1, the sheet body 1 includes a first light-shielding layer 11, a first PET layer 12, a copper alloy layer 13, a second PET layer 14, and a second light-shielding layer 15, which are sequentially disposed, and an inner wall of the light hole is recessed. The light shading sheet adopts a five-layer structure, and different concave diameters are formed on the copper alloy layer, the first PET layer and the second PET layer respectively, so that redundant light rays can be prevented from being reflected into a viewfinder, and the imaging quality is improved; in practical use, when light rays with different angles irradiate the concave-inward side wall, due to the concave-inward characteristic, part of the light rays can be reflected again and greatly reduce the light rays from entering the viewfinder.

In this embodiment, the first and second light-shielding layers have an inner diameter D1, the first and second PET layers have an inner diameter D2, the copper alloy layer has an inner diameter D3, and D1< D2< D3. The scheme forms the concave shape with convex stages, so that the anti-reflection effect is better compared with the arc-shaped concave. Preferably, the inner wall surface of the copper alloy layer is a rough surface to reduce reflection, and the forming process needs a slightly rough surface formed on the surface of the copper alloy during electrolytic forming.

In this embodiment, the first light-shielding layer 11 and the second light-shielding layer 15 are both ink layers. The printing ink layer adopts the printing ink of preventing printing ink of printing ink layer light transmission and extinction, prevents that the astigmatism that light passed PET formation from influencing the formation of image during this printing ink layer's effect. Specifically, referring to the light path reflection diagram shown in fig. 2, the first light shielding layer is a light absorbing ink, so that light is directly absorbed, visible light reflection can be substantially eliminated, and when other residual light is reflected to the PET layer and the copper alloy layer, corresponding blocking is formed.

The invention also provides a forming process of the light shield with the metal layer, and the implementation mode of the process is as follows.

Example 1, the following molding procedure was followed:

s1, coating a first PET layer on the upper surface of the copper alloy layer, and coating a second PET layer on the lower surface of the copper alloy layer;

s2, coating a first shading layer on the surface of the first PET layer, and coating a second shading layer on the surface of the second PET layer to form a shading belt; the shading belt is coiled by belt materials after being formed, the first shading layer and the second shading layer do not adopt anti-light-transmitting ink, so that light can be prevented from transmitting from the PET layer, and the ink is carbon ink which is resistant to acid corrosion and does not generate electrolytic reaction;

s3, punching the shading tape to form a single shading sheet body; the single light shading sheet body can be punched in different sizes according to actual needs.

S4, pre-punching the shading sheet body to form a fabrication hole; the inner wall of the smooth mirror surface is formed after punching, so that the punching precision is ensured.

S5, placing the shading sheet body in the solution to perform surface dissolving molding on the PET layer in the fabrication hole;

and S6, placing the light shielding sheet body in the electrolyte for electrolytic forming.

The forming process in the embodiment forms the inner wall with at least three different inner diameters through three times of forming, so that the formed shading sheet prevents redundant light from reflecting to enter the viewfinder, the imaging quality is improved, the formed product has good quality, the different inner diameters of each section are easily controlled accurately, and the stepped inner concave wall surface is realized.

Example 2, the following molding procedure was followed:

s1, coating a first PET layer on the upper surface of the copper alloy layer, and coating a second PET layer on the lower surface of the copper alloy layer;

s2, coating a first shading layer on the surface of the first PET layer, and coating a second shading layer on the surface of the second PET layer to form a shading belt; the shading belt is wound by belt materials after being formed, and the first shading layer and the second shading layer do not adopt anti-light-transmitting ink, so that light can be prevented from transmitting through the PET layer;

s3, punching the shading tape to form a single shading sheet body; the single light shading sheet body can be punched in different sizes according to actual needs.

S4, pre-punching the shading sheet body to form a fabrication hole; the inner wall of the smooth mirror surface is formed after punching, so that the punching precision is ensured.

S5, placing the batched (which can be determined according to the size of the solution pool and can be corroded by hundreds of thousands of pieces at a time) light-shielding sheet bodies in strong alkali solution potassium hydroxide, sodium hydroxide and lithium hydroxide for dissolving and forming; the dissolving and forming process comprises first forming, second forming and cleaning, wherein the concentration of a potassium hydroxide solution of the first forming is 50%, the temperature is 40 ℃, the corrosion time is 180 minutes, the concentration of an acetic acid solution of the second forming is 40%, the temperature is 35 ℃, the corrosion time is 60-80 minutes, the shading sheet body is cleaned by residues after the second forming, and in the step, the inner diameter of a PET layer reaches a required numerical value D2.

S6, the copper alloy layer is a copper-tin alloy, the copper accounts for 80%, and the tin accounts for 20%. And placing the shading sheet body in the electrolyte for electrolytic forming. The electrolytic forming is to place the shading sheet body as an anode into electrolyte, and control the current density to be 180A/square meter. The electrolyte comprises water, sulfuric acid and copper sulfate, wherein the content of copper ions is 40g/L, and the content of sulfuric acid is 180 g/L. In this step, the inner diameter of the copper alloy layer was brought to the desired value D3, and the total electrolytic forming time was about 60 minutes.

The forming process in the embodiment forms the inner wall with at least three different inner diameters through three times of forming, so that the formed shading sheet prevents redundant light from reflecting to enter the viewfinder, the imaging quality is improved, the formed product has good quality, the different inner diameters of each section are easily controlled accurately, and the stepped inner concave wall surface is realized.

Example 3, the following molding procedure was followed:

s1, coating a first PET layer on the upper surface of the copper alloy layer, and coating a second PET layer on the lower surface of the copper alloy layer;

s2, coating a first shading layer on the surface of the first PET layer, and coating a second shading layer on the surface of the second PET layer to form a shading belt; the shading belt is wound by belt materials after being formed, and the first shading layer and the second shading layer do not adopt anti-light-transmitting ink, so that light can be prevented from transmitting through the PET layer;

s3, punching the shading tape to form a single shading sheet body; the single light shading sheet body can be punched in different sizes according to actual needs.

S4, pre-punching the shading sheet body to form a fabrication hole; the inner wall of the smooth mirror surface is formed after punching, so that the punching precision is ensured.

S5, placing the batched (which can be determined according to the size of the solution pool and can corrode hundreds of thousands of pieces at a time) light-shielding sheet bodies in the solution for dissolving and forming; the dissolving and forming process comprises first forming, second forming and cleaning, wherein the concentration of a sodium hydroxide solution of the first forming is 35%, the temperature is 40 ℃, the corrosion time is 240 minutes, the concentration of a sodium hydroxide solution of the second forming is 30%, the temperature is 35 ℃, the corrosion time is 100 minutes, the sodium hydroxide solution is dissolved twice respectively, the inner diameter can be better controlled, the light shielding sheet body is cleaned by residues after the second forming, and in the step, the inner diameter of a PET layer reaches a required numerical value D2.

S6, the copper alloy layer is a copper-tin alloy, the copper accounts for 80%, and the tin accounts for 20%. And placing the shading sheet body in the electrolyte for electrolytic forming. The electrolytic forming is to place the light shading sheet body as an anode into electrolyte, and the current density is controlled to be 190A/square meter. The electrolyte comprises water, sulfuric acid and copper sulfate, wherein the content of copper ions is 45g/L, and the content of sulfuric acid is 190 g/L. In this step, the inner diameter of the copper alloy layer was brought to the desired value D3, and the total electroforming time was about 50 minutes.

The forming process in the embodiment forms the inner wall with at least three different inner diameters through three times of forming, so that the formed shading sheet prevents redundant light from reflecting to enter the viewfinder, the imaging quality is improved, the formed product has good quality, the different inner diameters of each section are easily controlled accurately, and the stepped inner concave wall surface is realized.

Example 4, the following molding procedure was followed:

s1, coating a first PET layer on the upper surface of the copper alloy layer, and coating a second PET layer on the lower surface of the copper alloy layer;

s2, coating a first shading layer on the surface of the first PET layer, and coating a second shading layer on the surface of the second PET layer to form a shading belt; the shading belt is wound by belt materials after being formed, and the first shading layer and the second shading layer do not adopt anti-light-transmitting ink, so that light can be prevented from transmitting through the PET layer;

s3, punching the shading tape to form a single shading sheet body; the single light shading sheet body can be punched in different sizes according to actual needs.

S4, pre-punching the shading sheet body to form a fabrication hole; the inner wall of the smooth mirror surface is formed after punching, so that the punching precision is ensured.

S5, placing the batched (which can be determined according to the size of the solution pool and can be corroded by hundreds of thousands of films at a time) light-shielding sheet bodies in a lithium hydroxide solution for dissolving and forming; the dissolution molding comprises first molding, second molding and cleaning, wherein the concentration of a lithium hydroxide solution of the first molding is 40%, the temperature is 40 ℃, the corrosion time is 240 minutes, the concentration of an acetic acid solution of the second molding is 30%, the temperature is 35 ℃, the corrosion time is 80-100 minutes, the shading sheet body is cleaned by residues after the second molding, and in the step, the inner diameter of the PET layer reaches a required numerical value D2.

S6, the copper alloy layer is a copper-tin alloy, the copper accounts for 80%, and the tin accounts for 20%. And placing the shading sheet body in the electrolyte for electrolytic forming. The electrolytic forming is to place the shading sheet body as an anode into electrolyte, and control the current density to be 200A/square meter. The electrolyte comprises water, sulfuric acid and copper sulfate, wherein the content of copper ions is 50g/L, and the content of sulfuric acid is 200 g/L. In this step, the inner diameter of the copper alloy layer was brought to the desired value D3, and the total electrolytic forming time was about 45 minutes.

The forming process in the embodiment forms the inner wall with at least three different inner diameters through three times of forming, so that the formed shading sheet prevents redundant light from reflecting to enter the viewfinder, the imaging quality is improved, the formed product has good quality, the different inner diameters of each section are easily controlled accurately, and the stepped inner concave wall surface is realized.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.