Paint spraying and pre-drawing method for glued mirror

Abstract

The invention discloses a paint spraying pre-drawing method for a glued mirror. The method comprises the following steps: cleaning a glued gap and removing residues; a black oily marking pen is used for conducting pre-blackening treatment on the gluing gap, so that the inner wall of the gap is completely covered with the black ink layer; and paint spraying and delustering are conducted on the surface of the glued part. According to the method, the black printing ink is pre-coated on the gluing gaps before paint spraying, so that the problem of white printing residue caused by insufficient paint permeation in the traditional process is effectively solved. According to the method, the extinction effect is remarkably improved, the spraying frequency and paint consumption are reduced, and the method is suitable for efficient production of various optical gluing devices.

Description

Technical Field

[0001] The invention relates to the technical field of optical device manufacturing, in particular to a glued mirror spray paint pre-drawing method, which is particularly suitable for eliminating white print defects generated after spraying paint on a glued gap. Background Art

[0002] In the manufacture of optical devices, the bonding gaps of bonded prisms or bonded parts need to be painted to avoid interference from light reflection. The traditional process uses direct spraying: the bonding gaps are repeatedly sprayed multiple times in an attempt to achieve matting by increasing the thickness of the paint layer. However, the main defects of this conventional method are:

[0003] First, the paint cannot completely penetrate into the micron-sized gaps (the gap width is usually 50-300μm) due to the capillary effect, resulting in residual reflective white prints inside; secondly, multiple spraying can easily cause paint accumulation, forming an uneven paint surface; thirdly, subsequent polishing or rework is required, which increases production costs.

[0004] In summary, there is a need to design a simple and practical method for spraying paint on glued parts that can effectively solve the problem of white print residue caused by insufficient paint penetration in traditional processes. Summary of the invention

[0005] The technical problem to be solved by the present invention is the problem of residual bright white marks at the gaps of glued parts after painting, paint accumulation on the paint surface and low matting efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a glued mirror spray paint pre-drawing method, comprising the following steps:

[0007] Step 1: Clean the glue gap and remove the residue;

[0008] Step 2: Use a black oil-based marker to pre-coat the glued gaps with black ink so that the inner wall of the gaps is completely covered with a black ink layer;

[0009] Step 3: Spray paint to matte the surface of the glued parts.

[0010] In the above scheme, in step one, cleaning the gluing gap includes: using an organic solvent in combination with ultrasonic cleaning or manual wiping.

[0011] In the above scheme, the organic solvent includes at least one of alcohol and acetone.

[0012] In the above scheme, the manual wiping includes using a cotton swab dipped in alcohol to wipe the gluing gap.

[0013] In the above scheme, in step 2, the ink absorbance OD value of the black oil-based marker pen is ≥ 1.2.

[0014] In the above scheme, in step 2, the pre-blackening process includes at least two reciprocating strokes along the gap.

[0015] In the above scheme, in step 2, the diameter of the tip of the black oil-based marker is 0.3-0.5 mm.

[0016] In the above scheme, in step three, the total paint film thickness of the spray paint matte is 10-30 μm.

[0017] In the above scheme, in step three, the number of spraying is 1-2 times.

[0018] Beneficial effects of the present invention:

[0019] The pre-coated black layer directly absorbs the reflected light in the gap, and the white print elimination rate after painting can be greater than 99%, thereby greatly improving the matte performance; the number of spraying times is reduced by 50%-70%, the paint pile defect rate is reduced to ≤5%, and the process is greatly simplified; and there is no need for additional polishing steps, the production efficiency is increased by 30%-50%, and the cost is greatly reduced; this method is suitable for optical devices made of a variety of bonding materials such as resin glue and epoxy glue, and has strong compatibility. DETAILED DESCRIPTION

[0020] The present invention is described in detail below.

[0021] The present invention discloses a method for pre-drawing a glued mirror spray paint, and those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve it. It should be particularly pointed out that all similar substitutions and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention, and relevant personnel can obviously modify or appropriately change and combine the contents described in this article without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0022] In the present invention, unless otherwise specified, scientific and technical terms used herein have the meanings commonly understood by those skilled in the art.

[0023] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] It should be noted that in the description of the present invention, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0026] The glued mirror spray painting pre-drawing method provided by the present invention mainly performs a pre-drawing black treatment on the glued gap before spray painting, and the specific steps are as follows:

[0027] The first step is to pre-treat the gap. The specific steps are as follows:

[0028] Clean the glue gap: Use an organic solvent, such as alcohol, acetone, or at least one of them, and use ultrasonic cleaning or manual wiping to completely remove the residue on the glue surface;

[0029] Pre-blackening treatment: Use a black oily marker pen to draw along the glued gap once or multiple times, so that the inner wall of the gap is completely covered with a black ink layer. Preferably, the ink absorbance OD value of the black oily marker pen is ≥1.2, the wavelength is 400-700nm, and the tip diameter of the black oily marker pen is preferably 0.3-0.5mm.

[0030] After the gap is pretreated, conventional painting is carried out. The specific steps are as follows:

[0031] First, after the black ink is dry, the surface of the glued parts is sprayed with matte paint according to the standard process;

[0032] Secondly, the number of spraying times is reduced to 1-2 times, and the paint layer thickness is controlled at 10-30μm.

[0033] The beneficial effects of the present invention are as follows:

[0034] The pre-coated black layer directly absorbs the reflected light in the gap, and the white print elimination rate after painting can be greater than 99%, thereby greatly improving the matte performance;

[0035] The number of spraying times is reduced by 50%-70%, the paint defect rate is reduced to ≤5%, and the process is greatly simplified;

[0036] No additional polishing process is required, production efficiency is increased by 30%-50%, and costs are greatly reduced;

[0037] This method is applicable to optical devices made of various bonding materials such as resin glue and epoxy glue, and has strong compatibility.

[0038] Embodiment 1 of the present invention: Double-cemented prism processing

[0039] 1. Use a cotton swab dipped in alcohol to wipe the glue gap to remove residual glue and contaminants;

[0040] 2. Use an oil-based marker with a tip diameter of 0.5 mm (black absorbance OD ≥ 1.5) to draw along the gap twice;

[0041] 3. Let the ink stand for 5 minutes to solidify;

[0042] 4. Spray epoxy matte paint (film thickness 15μm), detection shows no white marks at the gaps, and the paint surface flatness Ra≤0.5μm.

[0043] Embodiment 2 of the present invention: Double-cemented prism processing

[0044] 1. Use a cotton swab dipped in alcohol to wipe the glue gap to remove residual glue and contaminants;

[0045] 2. Use an oil-based marker with a tip diameter of 0.4 mm (black absorbance OD ≥ 1.5) to draw along the gap three times;

[0046] 3. Let the ink stand for 5 minutes to solidify;

[0047] 4. Spray epoxy matte paint (film thickness 10μm), detection shows no white marks in the gaps, and the paint surface flatness Ra≤0.5μm.

[0048] Embodiment 3 of the present invention: Double-cemented prism processing

[0049] 1. Use a cotton swab dipped in alcohol to wipe the glue gap to remove residual glue and contaminants;

[0050] 2. Use an oil-based marker with a tip diameter of 0.3 mm (black absorbance OD ≥ 1.5) to draw along the gap three times;

[0051] 3. Let the ink stand for 5 minutes to solidify;

[0052] 4. Spray epoxy matte paint (film thickness 30μm), test shows no white marks at the gap, paint surface flatness Ra ≤ 0.5μm

[0053] Embodiment 4 of the present invention: Processing of multiple cemented lens groups

[0054] 1. Place the glued parts in an ultrasonic cleaner at a frequency of 40kHz and clean them with acetone for 10 minutes;

[0055] 2. Use a 0.3mm ultra-fine marker pen to accurately outline the gap;

[0056] 3. Spray polyurethane matte paint twice, with a total thickness of 20μm, and the yield rate increased from 72% to 98%.

[0057] Embodiment 5 of the present invention: Processing of multiple cemented lens groups

[0058] 1. Place the glued parts in an ultrasonic cleaner at a frequency of 50kHz and clean them with alcohol for 10 minutes;

[0059] 2. Use a 0.5mm ultra-fine marker pen to accurately outline the gap;

[0060] 3. Spray polyurethane matte paint twice, with a total thickness of 25μm.

[0061] In the present invention, the pre-coated black layer directly absorbs the reflected light in the gap, and the white print elimination rate after painting can be greater than 99%, thereby greatly improving the matte performance; the number of spraying times is reduced by 50%-70%, the paint accumulation defect rate is reduced to ≤5%, and the process is greatly simplified; and no additional polishing process is required, the production efficiency is increased by 30%-50%, and the cost is greatly reduced; the method is suitable for optical devices made of various bonding materials such as resin glue and epoxy glue, and has strong compatibility.

[0062] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention.

Claims

1. The method of spray painting pre-drawing on a glued mirror is characterized in that: The following steps are involved: Step 1: Clean the glue gap and remove the residue; Step 2: Use a black oil-based marker to pre-coat the glued gaps with black ink so that the inner wall of the gaps is completely covered with a black ink layer; Step 3: Spray paint to matte the surface of the glued parts.

2. The method for pre-painting a glued mirror as claimed in claim 1, characterized in that: In step one, cleaning the bonding gap includes: using an organic solvent in combination with ultrasonic cleaning or manual wiping.

3. The method for pre-painting a glued mirror as claimed in claim 2, characterized in that: The organic solvent includes at least one of alcohol and acetone.

4. The method for pre-painting a glued mirror as claimed in claim 2, characterized in that: The manual wiping includes using a cotton swab dipped in alcohol to wipe the glued gap.

5. The method for pre-painting a glued mirror as claimed in claim 1, characterized in that: In step 2, the ink absorbance OD value of the black oil-based marker pen is ≥ 1.

2.

6. The method for spray painting pre-drawing of a glued mirror as claimed in claim 1, characterized in that: In step 2, the pre-blackening process includes at least two reciprocating strokes along the gap.

7. The method for pre-painting a glued mirror as claimed in claim 1, characterized in that: In step 2, the diameter of the tip of the black oil-based marker is 0.3-0.5 mm.

8. The method for pre-painting a glued mirror as claimed in claim 1, characterized in that: In step three, the total film thickness of the spray paint matte is 10-30 μm.

9. The method for pre-painting a glued mirror as claimed in claim 1, characterized in that: In step three, spray 1-2 times.