Screen printing plate steel wire mesh exposure process
Through systematic cleaning steps, using tools such as electrostatic brushes, calipers, and dust sticks, the problem of pollutant residues in the screen wire mesh exposure process is solved, significantly improving the clarity and consistency of the prints and improving production efficiency and exposure effects.
Patent Information
- Application Number
- CN202411315679.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-27
AI Technical Summary
The cleaning steps in the existing screen steel wire mesh exposure process are not systematic, resulting in pollutant residues affecting the exposure effect and causing pattern distortion.
Systematic cleaning steps include the use of tools and materials such as electrostatic brushes, calipers, dust sticks, unhydrated alcohol, dust rolls, and shade cloth to conduct multiple inspections and removals to ensure that the screen and equipment surfaces are free of foreign objects and Contamination, ensuring the accuracy and consistency of the exposure process.
It significantly improves the clarity and consistency of the print, reduces the rework rate, improves production efficiency, ensures the accuracy and error-free operation of each step, reduces fault conditions, and improves the accuracy of exposure and pattern.
Smart Images
Figure CN119200342A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of screen printing, in particular to a screen steel mesh exposure process. Background Art
[0002] With the continuous development of science and technology, screen printing technology has become one of the mainstreams in the printing industry. This printing method is widely used in packaging, labels, shirts and other fields with its fast printing speed and strong adaptability. However, the exposure process of the screen steel mesh plays a vital role in improving the clarity and consistency of the printed products.
[0003] The screen steel mesh exposure process is a technology specifically used for printed circuit boards (PCBs), screen printing and other fine graphics processing. The process uses steel mesh as a medium for pattern transfer, and transfers the design pattern from the screen to the base material through light. The main steps include: preparing the screen, coating the screen surface with light-sensitive materials (such as photoresist), light exposure, development, cleaning and drying, and finally printing or coating.
[0004] Although the existing screen steel mesh exposure process has achieved certain results, the unsystematic cleaning steps often lead to residual contaminants, which directly affect the exposure effect and cause pattern distortion. In order to further improve the printing quality, it is necessary to optimize and improve the cleaning process. Summary of the invention
[0005] The present application provides a screen steel mesh exposure process with a systematic cleaning step for improving the exposure effect.
[0006] The present application provides a screen steel mesh exposure process, which adopts the following technical solution: A screen steel mesh exposure process, wherein the exposure steps include: Step S1: Select a light diffuser plate that matches the required product, clean the surface of the screen with an anti-static brush, and check whether there is dirt or foreign matter on the light diffuser plate; Step S2: Draw a center positioning line on the film with the help of a caliper to ensure subsequent accurate alignment; Step S3: Place the designated single-exposure film on the photosensitive surface of the screen. After the attachment is completed, place it on the plate inspection table to check whether there is any foreign matter between the screen and the film; if any foreign matter is found, use a dust stick to remove it; Step S4: Before exposing the screen, use anhydrous alcohol to clean the exposure machine to ensure that there are no pollutants that affect the exposure effect; Step S5: Place the screen with the exposure film attached to it in the center of the exposure machine, and check whether there is any foreign matter on the back of the screen. If any foreign matter is found, use a sticky stick to remove it. Step S6: Clean the exposure cover plate with a dust-sticking roller, and after confirming that the cleaning is correct, place the exposure cover plate in the center on the back of the screen; Step S7: operate the reset handle to reset the lower pressure shaft of the exposure machine, and place appropriate weights at the position of the pattern positioning hole to maintain stability; Step S8: Cover the machine table with a shading cloth, set appropriate exposure parameters, and press the start button to start the exposure process; Step S9: Before using the vacuum exposure machine for exposure, wipe the glass surface of the machine with anhydrous alcohol, and check the back of the screen again to ensure that there is no foreign matter; if foreign matter is found, use a dust stick to deal with it; Step S10: Clean the exposure cover or the rubber tower to ensure that its surface is clean and dust-free; Step S11: placing the cleaned exposure cover plate and rubber tower in appropriate positions, and placing air guide strips in the left and right frames of the screen to ensure uniform discharge of airflow under vacuum; Step S12: After setting the exposure parameters, pull down the hand switch to start the exposure, and make sure to record the air pressure of the pressure-bonding exposure machine and the vacuum pressure of the vacuum exposure machine to verify the working air pressure range of the machine.
[0007] By adopting the above technical solution, the cleaning of steps S1 and S4 is the key in the exposure process, which can significantly improve the clarity and consistency of the printed product; by drawing the center positioning line on the film in step S2, the subsequent accurate alignment is ensured; the screen in step S5 is also accurately positioned to avoid pattern distortion due to improper alignment; and in steps S3, S9 and S10, foreign matter is inspected and removed in multiple steps to ensure that each step will not be affected by external factors; systematic foreign matter inspection reduces the possibility of later problems, improves production efficiency, and reduces rework rate; there is a systematic cleaning step to improve the exposure effect.
[0008] Preferably, in step S2, the surface roughness of the caliper is less than 0.2 μm.
[0009] By adopting the above technical solution, a caliper with a surface roughness of less than 0.2 μm can effectively prevent scratches on the light diffusion surface.
[0010] Preferably, in step S3, the film is centrally attached to the screen by a residue-free tape.
[0011] By adopting the above technical solutions, ensuring the centering of the film can avoid image deviation, ensure the accuracy and alignment of the final printed pattern, and thus improve image quality; and using residue-free tape can prevent the glue on the tape from remaining on the screen after removal, avoiding affecting the quality of the next print and reducing potential printing defects.
[0012] Preferably, in step S4, after the machine is cleaned with anhydrous alcohol, the machine is wiped by moving the dust-free cloth from right to left.
[0013] By adopting the above technical solution and wiping from right to left, it is possible to avoid re-contamination of the cleaned area due to back and forth movement, thereby ensuring a better cleaning effect.
[0014] Preferably, in step S6, before using the sticky roller to clean the exposure cover, it is necessary to check whether there are foreign objects and dirt on the sponge on the contact surface of the cover.
[0015] By adopting the above technical solution, the flatness during the exposure process can be ensured after inspection to avoid potential damage caused by foreign matter; ensuring the contact surface is clean helps to achieve uniform pressure distribution during exposure, avoiding the incomplete transfer of emulsion due to uneven pressure, which in turn affects the clarity and accuracy of the pattern.
[0016] Preferably, in step S6, the cover plate is placed to cover the entire graphics.
[0017] By adopting the above technical solution, the cover plate covering helps to avoid the formation of bubbles and ensure the tightness in the entire graphic area.
[0018] Preferably, in step S8, the shading cloth is used to completely cover the exposure machine table.
[0019] By adopting the above technical solution, the blackout cloth can block the light in the surrounding environment and ensure that only ultraviolet rays are received during the exposure process, thereby improving the exposure quality and reducing pattern blur or distortion.
[0020] Preferably, in step S11, the exposure cover is used to cover the entire halftone pattern.
[0021] By adopting the above technical solution, the cover plate can ensure uniform distribution of light during the exposure process, so that each part of the screen can be evenly illuminated, avoiding pattern deviation caused by uneven light.
[0022] Preferably, in step S12, the pressure of the pressure-bonding exposure machine is in the range of 0.4-0.6 MPa.
[0023] By adopting the above technical solution, it is possible to ensure that uniform pressure is applied to the exposure material within the air pressure range of 0.4-0.6 MPa.
[0024] Preferably, in step S12, the vacuum pressure of the vacuum exposure machine has a vacuum pressure range of 0.035-0.045 MPa.
[0025] By adopting the above technical solution, within the vacuum pressure range of 0.035-0.045 MPa, it can be ensured that the exposure plate and the substrate are well attached to avoid poor contact.
[0026] In summary, this application has the following beneficial effects: 1. Cleaning in steps S1 and S4 is key in the exposure process and can significantly improve the clarity and consistency of printed products. In step S2, the center positioning line is drawn on the film to ensure subsequent accurate alignment. Similarly, the screen is accurately positioned in step S5 to avoid pattern distortion due to improper alignment. In steps S3, S9 and S10, foreign matter is inspected and removed in multiple steps to ensure that each step will not be affected by external factors. Systematic foreign matter inspection reduces the possibility of later problems, improves production efficiency and reduces rework rate.
[0027] 2. Through steps S6 and S11; clean and properly place the exposure cover and rubber tower to ensure uniform airflow discharge under vacuum; good structure and preparation can improve the consistency and overall effect of exposure, ensure good access to each component, and reduce failures.
[0028] 3. In steps S7, S8 and S12, a scientific operating procedure is established by resetting the handle, covering with blackout cloth and setting parameters. The rigorous operating procedure ensures that each step is carried out in accordance with the standard, which helps operators reduce errors and ensures that each step has a basis.
[0029] 4. In step S12, the air pressure and vacuum pressure are recorded to verify the working parameters of the machine; this provides data support for process quality control and can help technicians perform troubleshooting and quality assessment. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 1 is a process flow chart of screen steel mesh exposure in this embodiment. DETAILED DESCRIPTION
[0031] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content. Example
[0032] The present invention discloses a screen steel mesh exposure process, such as Figure 1 As shown, the exposure steps include: Step S1: Select a light diffusion plate that matches the required product, clean the surface of the screen with an anti-static brush, and check whether there is dirt or foreign matter on the light diffusion plate.
[0033] Step S2: Draw a center positioning line on the film with the help of a caliper to ensure subsequent precise alignment; specifically, the surface roughness of the caliper is 0.15 μm, which can reduce friction and errors during measurement, ensure more accurate readings, and is suitable for measurement requirements of tiny sizes; the smooth surface can reduce the risk of scratching the light diffuser during use.
[0034] Step S3: Place the designated single-exposure film on the photosensitive surface of the screen. After the attachment is completed, place it on the plate inspection table to check whether there is any foreign matter between the screen and the film. If any foreign matter is found, use a sticky stick to remove it. Specifically, the film is attached to the screen in the center with a residue-free tape. The deviation of the exposed film from the center of the screen cannot exceed ±1mm. Ensuring the center of the film can avoid image deviation and ensure the accuracy and alignment of the final printed pattern, thereby improving image quality. The use of residue-free tape can prevent the glue on the tape from remaining on the screen after removal, avoiding affecting the quality of the next print and reducing potential printing defects. The protective effect of the residue-free tape on the film and screen during the attachment and removal process reduces the risk of material damage and ensures that both remain in good condition.
[0035] Step S4: Before exposing the screen, use anhydrous alcohol to clean the exposure machine. After cleaning the machine with anhydrous alcohol, wipe the machine by moving the dust-free cloth from right to left. Wiping from right to left can avoid re-contamination of the cleaned area due to back and forth movement, ensuring better cleaning effect. Fixed wiping direction can make the cleaning process more efficient, reduce missed areas, and ensure that each part can be thoroughly cleaned. And consistent wiping direction can prevent scratches or damage on the machine surface due to improper friction during the cleaning process, thereby better protecting the equipment; to ensure that no pollutants affect the exposure effect.
[0036] Step S5: Place the screen with the exposure film attached to it in the center of the exposure machine, and check whether there is any foreign matter on the back of the screen. If any foreign matter is found, use a sticky stick to remove it.
[0037] Step S6: Check whether there are foreign objects and dirt on the sponge on the contact surface of the cover plate; dust, particles, etc. on the contact surface of the cover plate may cause poor contact or damage the emulsion during exposure; after inspection, the flatness during exposure can be ensured to avoid potential damage caused by foreign objects; ensuring that the contact surface is clean will help to achieve uniform pressure distribution during exposure and avoid the incomplete transfer of emulsion due to uneven pressure, thereby affecting the clarity and accuracy of the pattern; inspection before each use can timely discover and deal with problems, ensure subsequent cleaning and operating efficiency, and reduce the trouble of later repair; then use a sticky dust roller to clean the exposure cover plate, and after confirming that the cleaning is correct, place the exposure cover plate in the center on the back of the screen; it is worth noting that during the exposure process, pay attention to the light diffusion plate not being exposed to water to avoid causing the emulsion to fall off.
[0038] Moreover, a cover plate is placed to cover the entire graphic; during the exposure or printing process, the cover plate helps to avoid the formation of bubbles and ensure the adhesion of the entire graphic area; good screen adhesion ensures the clarity and accuracy of the pattern during the printing process, reduces the phenomenon of missing printing, and improves the quality of the finished product.
[0039] Step S7: operate the reset handle to reset the lower pressure shaft of the exposure machine, and place appropriate weights at the position of the pattern positioning hole to maintain stability.
[0040] Step S8: Cover the machine table with a blackout cloth, which completely covers the exposure machine table; it can effectively block the light in the surrounding environment and ensure that only ultraviolet rays are received during the exposure process, thereby improving the exposure quality and reducing pattern blur or distortion; then set appropriate exposure parameters and press the start button to start the exposure process.
[0041] Step S9: Before using the vacuum exposure machine for exposure, wipe the glass surface of the machine with anhydrous alcohol, and check the back of the screen again to ensure that there is no foreign matter; if foreign matter is found, use a sticky stick to handle it.
[0042] Step S10: Clean the exposure cover or the rubber tower to ensure that its surface is clean and dust-free.
[0043] Step S11: Place the cleaned exposure cover plate and rubber tower in appropriate positions, and the exposure cover plate completely covers the entire screen pattern; the cover plate can ensure uniform distribution of light during the exposure process, so that each part of the screen can be evenly illuminated, avoiding pattern deviation caused by uneven light; the cover plate covering the entire screen pattern can effectively protect the unexposed area, prevent the influence of accidental light sources, reduce exposure errors, and ensure the integrity of the pattern; and place the air guide strips in the left and right frames of the screen to ensure uniform discharge of airflow under vacuum.
[0044] Step S12: After setting the exposure parameters, pull down the hand switch to start the exposure, and make sure to record the air pressure of the pressure-bonding exposure machine and the vacuum pressure of the vacuum exposure machine to verify the working air pressure range of the machine.
[0045] Specifically, the air pressure value of the pressure-bonding exposure machine is 0.5 MPa. Under the action of 0.5 MPa air pressure, it can ensure that uniform pressure is applied to the exposure material. This helps to keep the screen and the substrate in close contact to avoid uneven exposure due to poor contact. Moreover, under the action of 0.5 MPa air pressure, it can well balance the fitting effect and ensure effective exposure.
[0046] In step S12, the vacuum pressure of the vacuum exposure machine is 0.040 MPa. Within the vacuum pressure range of 0.040 MPa, a good fit between the exposure plate and the substrate can be ensured, thereby avoiding poor contact and ensuring the uniformity and consistency of the exposure process.
[0047] In summary, the cleaning of steps S1 and S4 is the key to the exposure process. Ensuring that there are no pollutants on the surface of the screen and equipment can prevent interference with the exposure effect and ensure the accurate transmission of the pattern. Even tiny dirt or foreign matter can affect the image quality, so thorough cleaning can significantly improve the clarity and consistency of the printed product. By drawing the center positioning line on the film in step S2, accurate alignment is ensured in the subsequent process. Similarly, the screen is accurately positioned in step S5 to avoid pattern distortion caused by improper alignment. Accurate alignment ensures accurate replication of the pattern on the screen, reducing the error rate in production.
[0048] In steps S3, S9 and S10, foreign matter is inspected and removed in multiple steps to ensure that each step will not be affected by external factors; systematic foreign matter inspection reduces the possibility of later problems, improves production efficiency and reduces rework rate.
[0049] Through steps S6 and S11; the exposure cover and rubber tower are cleaned and properly placed to ensure uniform airflow discharge under vacuum; good structure and preparation can improve the consistency and overall effect of exposure, ensure good access to each component, and reduce failures.
[0050] In steps S7, S8 and S12, a scientific operating procedure is established by resetting the handle, covering with blackout cloth and setting parameters. The rigorous operating procedure ensures that each step is carried out in accordance with the standard, which helps operators reduce errors and ensures that each step has a basis to rely on.
[0051] In step S12, the air pressure and vacuum pressure are recorded to verify the working parameters of the machine; this provides data support for process quality control and can help technicians perform troubleshooting and quality assessment.
[0052] Therefore, through the above steps, the screen steel screen exposure process not only ensures the quality and effect of the final product, but also significantly improves production efficiency and reduces costs through precise operation and strict process. This standardized method provides a solid guarantee for the stability and reliability of the printing industry.
[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A screen steel mesh exposure process, characterized in that: The exposure steps include: Step S1: Select a light diffuser plate that matches the required product, clean the surface of the screen with an anti-static brush, and check whether there is dirt or foreign matter on the light diffuser plate; Step S2: Draw a center positioning line on the film with the help of a caliper to ensure subsequent accurate alignment; Step S3: Place the designated single-exposure film on the photosensitive surface of the screen. After the attachment is completed, place it on the plate inspection table to check whether there is any foreign matter between the screen and the film; if any foreign matter is found, use a dust stick to remove it; Step S4: Before exposing the screen, use anhydrous alcohol to clean the exposure machine to ensure that there are no pollutants that affect the exposure effect; Step S5: Place the screen with the exposure film attached to it in the center of the exposure machine, and check whether there is any foreign matter on the back of the screen. If any foreign matter is found, use a sticky stick to remove it. Step S6: Clean the exposure cover plate with a dust-sticking roller, and after confirming that the cleaning is correct, place the exposure cover plate in the center on the back of the screen; Step S7: operate the reset handle to reset the lower pressure shaft of the exposure machine, and place appropriate weights at the position of the pattern positioning hole to maintain stability; Step S8: Cover the machine table with a shading cloth, set appropriate exposure parameters, and press the start button to start the exposure process; Step S9: Before using the vacuum exposure machine for exposure, wipe the glass surface of the machine with anhydrous alcohol, and check the back of the screen again to ensure that there is no foreign matter; if foreign matter is found, use a dust stick to deal with it; Step S10: Clean the exposure cover or rubber tower to ensure that its surface is clean and dust-free; Step S11: placing the cleaned exposure cover plate and rubber tower in appropriate positions, and placing air guide strips in the left and right frames of the screen to ensure uniform discharge of airflow under vacuum; Step S12: After setting the exposure parameters, pull down the hand switch to start the exposure, and make sure to record the air pressure of the pressure-bonding exposure machine and the vacuum pressure of the vacuum exposure machine to verify the working air pressure range of the machine.
2. The screen steel mesh exposure process according to claim 1, characterized in that: In step S2, the surface roughness of the caliper is less than 0.2 μm.
3. The screen steel mesh exposure process according to claim 1, characterized in that: In step S3, the film is centrally attached to the screen by a residue-free tape.
4. The screen steel mesh exposure process according to claim 1, characterized in that: In step S4, after the machine is cleaned with anhydrous alcohol, the machine is wiped by moving the dust-free cloth from right to left.
5. The screen steel mesh exposure process according to claim 1, characterized in that: In step S6, before using the sticky roller to clean the exposure cover, it is necessary to check whether there are foreign objects or dirt on the sponge on the contact surface of the cover.
6. The screen steel mesh exposure process according to claim 1, characterized in that: In step S6, the cover plate is placed to cover the entire graphics.
7. The screen steel mesh exposure process according to claim 1, characterized in that: In step S8, the shading cloth is used to completely cover the exposure machine table.
8. The screen steel mesh exposure process according to claim 1, characterized in that: In step S11, the exposure cover is used to cover all the halftone patterns.
9. The screen steel mesh exposure process according to claim 1, characterized in that: In step S12, the pressure of the pressure exposure machine is in the range of 0.4-0.6 MPa.
10. The screen steel mesh exposure process according to claim 1, characterized in that: In step S12, the vacuum pressure of the vacuum exposure machine has a pressure range of 0.035-0.045 MPa.