Manufacturing method for silk-screen printing

Abstract

The invention discloses a silk-screen printing manufacturing method, which comprises the steps of stretching a screen, performing hot melting, jacking a frame, gluing, cutting, immersing and forming a pattern, and the pattern forming step of the traditional silk-screen printing manufacturing method comprises the following steps of: pressing a film on the surface of a steel wire mesh, and presetting a pattern through CAD (Computer Aided Design) drawing. And finally, cutting is conducted on the PI surface through laser according to a preset pattern, the method is slow in cutting and low in production efficiency, the pattern is directly formed on the PI surface through the LDI technology, and in the pattern forming process, the PI solution on the surface of the steel wire mesh soaked in the PI solution can be subjected to UV curing, and a PI film is formed. The method has the advantages that the time for forming the pattern through laser cutting is greatly shortened, the manufacturing process is simplified and improved, deviation generated by multiple procedures is avoided, the product precision is greatly improved, digitization and intellectualization of production and manufacturing are achieved, the pattern forming efficiency is improved, and large-scale production of electronic elements is facilitated.

Description

Technical Field

[0001] The invention relates to the field of screen printing, and in particular to a method for making screen printing. Background Art

[0002] Screen printing refers to using a silk screen as a base and making a screen printing plate with images through a photosensitive platemaking method. Screen printing consists of five major elements: screen printing plate, scraper, ink, printing table and substrate. Printing is based on the basic principle that the mesh holes of the image part of the screen printing plate can pass the ink, while the mesh holes of the non-image part cannot pass the ink. When printing, pour ink on one end of the screen printing plate, use a scraper to apply a certain pressure to the ink part on the screen printing plate, and move at a constant speed toward the other end of the screen printing plate. During the movement, the ink is squeezed from the mesh holes of the image part to the substrate by the scraper.

[0003] Screen printing has been used in many industries for a long time, and its main processes are: stretching the screen → coating → exposure → development → inspection → packaging and shipment. The printing of electronic paste in the production of passive electronic components has also been using this production process. The advantage is that the method is mature, but there are also many disadvantages, such as short life, low precision, and environmentally unfriendly production process. Later, the laser + PI composite screen process appeared, and the production process is: clear frame → brushing base glue → PE hot melt → top frame → gluing → lower screen cutting → film pressing PI → CAD drawing → laser cutting → inspection → packaging and shipment. This process eliminates emulsion coating and graphic transfer, replaces emulsion with hot pressing PI film, and uses laser to cut out the graphics to be printed on the PI film. This technology improves the graphics and printing accuracy and greatly increases the life, but the efficiency is very low in the face of complex graphics, affecting normal production and manufacturing, and cannot be produced and supplied on a large scale. Summary of the invention

[0004] The invention provides a screen printing manufacturing method for solving the problem that the laser cutting efficiency is low in the existing printing process of electronic paste of passive electronic components, which results in the inability to mass produce electronic components.

[0005] In order to solve the above technical problems, the present invention discloses the following technical solutions: The invention provides a method for making screen printing, comprising a screen stretching step, a hot melting step, a top frame step, a gluing step, a cutting step, an immersion step and a pattern forming step.

[0006] The mesh stretching step is to fix the stretched polyester mesh to the lower surface of the first mesh frame; the hot melting step is to place the PE adhesive ring and the steel mesh in the first mesh frame in turn, perform heat pressing on the steel mesh and the polyester mesh, and the hot-melted PE adhesive ring adheres the steel mesh to the lower surface of the polyester mesh to form a polymer layer; the top frame step is to abut the second mesh frame against the lower surface of the steel mesh of the polymer layer; the gluing step is to evenly apply the mesh glue to the surface of the steel mesh so that the steel mesh is bonded to the lower surface of the second mesh frame; the cutting step is to cut the polymer layer along the outer edge of the second mesh frame; the immersion step is to place the cut second mesh frame with the steel mesh in a transparent container filled with PI solution; the pattern forming step is to place the laser generator under the transparent container, project the preset pattern onto the steel mesh on the lower surface of the second mesh frame by laser direct writing technology, and perform UV curing on the PI solution to form a PI polymer layer with a pattern.

[0007] Furthermore, in the hot-melt step, the PE rubber ring is a square ring, which is arranged opposite to the edge of the steel wire mesh.

[0008] Furthermore, before the screen stretching step, a cleaning step is also included, and the cleaning step is to clean the first screen frame.

[0009] Furthermore, after the mesh stretching step, a primer brushing step is also included, wherein the primer brushing step is to evenly brush the primer on the contact surface between the first mesh frame and the polyester mesh cloth, and let it stand for a period of time until the primer is shade-dried.

[0010] Furthermore, in the pattern forming step, the laser direct writing technology uses UV light, and when the UV light is irradiated into the PI solution, a layer of PI film is formed on the surface of the steel mesh.

[0011] Furthermore, in the pattern forming step, ultraviolet rays are used to perform UV curing on the PI solution.

[0012] Furthermore, the temperature of the PI solution is preset as a solution temperature threshold.

[0013] Furthermore, the energy of the UV light is preset as an energy threshold.

[0014] Furthermore, the wavelength of the UV light is preset as a wavelength threshold.

[0015] Furthermore, when the second screen frame is immersed in the PI solution, the lower surface of the second screen frame faces the bottom surface of the transparent container.

[0016] Furthermore, the pattern forming step includes presetting a light temperature threshold so that UV light irradiates the PI solution at the light temperature threshold; presetting a light duration threshold so that UV light irradiates the PI solution at the preset temperature for the light duration threshold; wherein the thickness of the PI film can be controlled by presetting the light temperature and the light duration.

[0017] Compared with the prior art, the present invention has at least the following technical effects: The invention provides a screen printing manufacturing method, comprising a screen stretching step, a hot melting step, a top frame step, a gluing step, a cutting step, an immersion step and a pattern forming step. The pattern forming step of the traditional screen printing manufacturing method is to first press a film on the surface of a steel screen, then draw a preset pattern through CAD, and finally cut the PI surface according to the preset pattern through a laser. This method has slow cutting and low production efficiency. The invention directly forms a pattern on the PI surface through LDI technology, and in the process of forming the pattern, the PI solution on the surface of the steel screen immersed in the PI solution will be UV cured to form a PI film, which greatly shortens the time for laser cutting to form a pattern, simplifies and transforms the manufacturing process, avoids the deviation caused by multiple processes, greatly improves the product accuracy, realizes the digitization and intelligence of production and manufacturing, improves the pattern forming efficiency, and facilitates the large-scale production of electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a flow chart of the screen printing manufacturing method according to an embodiment of the present invention; Figure 2 A schematic diagram of a hot melting step according to an embodiment of the present invention; Figure 3 A schematic diagram of a top frame step according to an embodiment of the present invention; Figure 4 A schematic diagram of the second screen frame after the cutting step according to an embodiment of the present invention; Figure 5 This is a schematic diagram of forming a pattern on a steel mesh by laser direct writing according to an embodiment of the present invention.

[0020] The components in the figure are marked as follows: 100 first mesh frame, 200 polyester mesh, 300 steel mesh, 400 PE rubber ring, 500 second mesh frame, 510 lower surface of the second mesh frame, 520 upper surface of the second mesh frame, 600 polymer layer, 610 target polymer layer, 700 PI solution, 800 transparent container. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] In conjunction with the drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0023] The present invention provides a screen printing manufacturing method to solve the problems in the existing preparation process that the laser cutting accuracy is difficult to ensure and the laser cutting speed is slow, resulting in low production efficiency of passive electronic components and inability to mass produce.

[0024] The present application provides a screen printing manufacturing method, including step S1) a cleaning step, step S2) a screen stretching step, step S3) a base glue brushing step, step S4) a hot melt step, step S5) a top frame step, step S6) a gluing step, step S7) a cutting step, step S8) an immersion step, and step S9) a pattern forming step.

[0025] Step S1) Cleaning step: cleaning the first screen frame 100 to remove residual glue, debris and dust, checking whether the first screen frame 100 is damaged or deformed, and ensuring the cleanliness and flatness of the surface of the first screen frame 100.

[0026] Step S2) is a mesh stretching step, in which the stretched polyester mesh 200 is fixed to the lower surface of the first mesh frame. Since the polyester mesh 200 is soft, the polyester mesh 200 is stretched and fixed on the first mesh frame 100 to form a polyester mesh plane with a certain supporting force, which is convenient for laminating with the steel mesh 300 and can avoid the position of the steel mesh 300 from being offset in subsequent processes to ensure processing accuracy.

[0027] Step S3) Applying primer, evenly apply the primer on the contact surface between the first screen frame 100 and the polyester mesh 200, and let it stand for a while until the primer is shade-dried. Applying the primer is to enhance the adhesion between the mesh and the screen frame and improve the printing quality.

[0028] Step S4) hot-melt step, placing the PE rubber ring 400 and the steel mesh 300 in the first mesh frame 100 in sequence, the PE rubber ring 400 is a square ring, arranged opposite to the edge of the steel mesh 300, and the steel mesh 300 and the polyester mesh cloth 200 are subjected to hot-pressing treatment, and the hot-melted PE rubber ring 400 adheres the steel mesh 300 to the lower surface of the polyester mesh cloth 200 to form a polymer layer 600, the thickness of the PE rubber ring 400 is 150μm~170μm, and the thickness of the polymer layer 600 is determined according to the material requirements.

[0029] Step S5) is a top frame step, in which the second mesh frame 500 is abutted against the lower surface of the wire mesh 300 of the polymer layer 600, and the polymer layer 600 attached to the lower bottom surface of the second mesh frame 500 is defined as the target polymer layer 610. Specifically, the through hole area enclosed by the second mesh frame 500 is smaller than the through hole area enclosed by the first mesh frame 100, that is, the second mesh frame 500 can be accommodated in the frame of the first mesh frame 100. At this time, the second mesh frame 500 is used to support the wire mesh 300 of the polymer layer 600, so that the target polymer layer 610 forms a flat plane on the lower surface 510 of the second mesh frame, ensuring the flatness of the surface of the wire mesh 300, so that the height of the subsequent laser direct writing pattern relative to the wire mesh 300 is consistent, thereby improving the effect of the laser direct writing pattern of the wire mesh 300.

[0030] Step S6) Gluing step, evenly brushing the mesh glue onto the surface of the wire mesh 300, so that the wire mesh 300 is bonded to the lower surface 510 of the second mesh frame, and the target polymer layer 610 is firmly bonded to the lower surface 510 of the second mesh frame.

[0031] Step S7) a cutting step, cutting the polymer layer 600 along the outer edge of the second mesh frame 500, cutting the target polymer layer 610 from the polymer layer 600, and at this time, the target polymer layer 610 is adhered to the lower surface 510 of the second mesh frame.

[0032] Step S8) is an immersion step, in which the cut second mesh frame 500 with the steel mesh 300 is placed in a transparent container 800 filled with a PI solution 700. In the present embodiment, the transparent container 800 is a quartz glass vessel, and the steel mesh 300 of the target polymer layer 610 faces downward, that is, the lower surface 510 of the second mesh frame faces the bottom surface of the transparent container 800, and the upper surface 520 of the second mesh frame faces the outside of the transparent container 800. In this way, the target polymer layer 610 and the second mesh frame 500 are immersed in the PI solution 700 to avoid the buoyancy of the PI solution 700, which causes the target polymer layer 610 of the second mesh frame 500 to be unable to be completely immersed in the PI solution, thereby affecting the formation of a complete PI film with the required thickness on the surface of the steel mesh 300 of the target polymer layer 610.

[0033] Step S9) Pattern forming step, placing a laser generator under the transparent container 800, projecting a preset pattern onto the steel mesh 300 on the lower surface of the second mesh frame 500 by laser direct writing technology, and performing UV curing treatment on the PI solution 700 to form a PI polymer layer with a pattern. Specifically, the pattern is only formed on the steel mesh 300 by laser direct writing technology, and the integrity of the polyester mesh 200 will not be damaged.

[0034] Furthermore, in step S9), in the pattern forming step, the laser direct writing technology uses UV light. When the UV light is irradiated into the PI solution 700, a layer of PI film is formed on the surface of the steel mesh. The thickness of the PI film is determined by the duration of the UV light irradiation and the temperature of the UV light irradiation.

[0035] In this embodiment, a light temperature threshold is preset so that UV light irradiates the PI solution 700 at the light temperature threshold; a light duration threshold is preset so that UV light irradiates the PI solution 700 at the preset temperature for the light duration threshold; wherein, by presetting the light temperature and the light duration, the thickness of the PI film can be controlled to ensure that the thickness of the PI film is between 2μm and 25μm, which is up to standard. Different light temperature thresholds and light duration thresholds can be preset according to needs to form PI films with different thicknesses.

[0036] Furthermore, in step S9), in the pattern forming step, ultraviolet light is used to UV-cure the PI solution 700. Specifically, the UV light includes an ultraviolet band. When the preset pattern is engraved on the wire mesh 300 by LDI technology, since the wire mesh 300 is immersed in the PI solution 700, even when the pattern is formed on the wire mesh 300, the PI film is also formed simultaneously, saving the time of the process flow.

[0037] Furthermore, the temperature of the PI solution 700 is preset as a solution temperature threshold, and the solution temperature threshold range is 280° C. to 300° C.

[0038] Furthermore, the energy of the UV light is preset to an energy threshold, and the energy threshold is 100 mJ. The thickness of the PI film can also be controlled by controlling the energy of the UV light.

[0039] Furthermore, the wavelength of the UV light is preset as a wavelength threshold, and the wavelength threshold is 405 nanometers.

[0040] The advantage of the present application is that it provides a screen printing production method, including a screen stretching step, a hot melt step, a top frame step, a gluing step, a cutting step, an immersion step and a pattern forming step. The pattern forming step of the traditional screen printing production method is to first press a film on the surface of the steel screen, then use CAD to draw a preset pattern, and finally use a laser to cut the PI surface according to the preset pattern. This method has slow cutting and low production efficiency. The present invention directly forms a pattern on the PI surface through LDI technology, and in the process of forming the pattern, the PI solution on the surface of the steel screen immersed in the PI solution will be UV cured to form a PI film, which greatly shortens the time for laser cutting to form a pattern, simplifies and transforms the manufacturing process and avoids the deviation caused by multiple processes, greatly improves product accuracy, realizes the digitization and intelligence of production and manufacturing, improves pattern formation efficiency, and facilitates large-scale production of electronic components.

[0041] The above is a detailed introduction to a screen printing production method provided by an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A screen printing method, characterized in that: include: A mesh stretching step, in which the stretched polyester mesh is fixed to the lower surface of the first mesh frame; Hot-melt step, placing the PE rubber ring and the steel wire mesh in the first mesh frame in sequence, performing heat-pressing treatment on the steel wire mesh and the polyester mesh cloth, and the hot-melted PE rubber ring adheres the steel wire mesh to the lower surface of the polyester mesh cloth to form a polymer layer; A top frame step, wherein a second mesh frame is abutted against the lower surface of the steel mesh of the polymer layer; A gluing step, in which the gluing glue is evenly applied to the surface of the steel mesh so that the steel mesh is bonded to the lower surface of the second mesh frame; a cutting step of cutting the polymer layer along the outer edge of the second screen frame; Immersing step: placing the cut second mesh frame with the steel mesh in a transparent container filled with PI solution; as well as In the pattern forming step, a laser generator is placed under the transparent container, a preset pattern is projected onto the steel wire mesh on the lower surface of the second mesh frame by laser direct writing technology, and the PI solution is UV cured to form a PI polymer layer with a pattern.

2. The screen printing method according to claim 1, characterized in that: In the hot melting step, The PE rubber ring is a square ring and is arranged opposite to the edge of the steel wire mesh.

3. The screen printing method according to claim 1, characterized in that: Before the mesh stretching step, the method further comprises: A cleaning step of cleaning the first screen frame; After the mesh stretching step, the method further comprises: The primer-brushing step is to evenly brush the primer on the contact surface between the first screen frame and the polyester mesh cloth, and let it stand for a period of time until the primer is shade-dried.

4. The screen printing method according to claim 1, characterized in that: In the pattern forming step, The laser direct writing technology uses UV light. When the UV light is irradiated into the PI solution, a layer of PI film is formed on the surface of the steel mesh.

5. The screen printing method according to claim 1, characterized in that: In the pattern forming step, The PI solution is UV-cured by ultraviolet light.

6. The screen printing method according to claim 1, characterized in that: The temperature of the PI solution is preset as a solution temperature threshold.

7. The screen printing method according to claim 4, characterized in that: The energy of the UV light is preset as an energy threshold.

8. The screen printing method according to claim 4, characterized in that: The wavelength of the UV light is preset as a wavelength threshold.

9. The screen printing method according to claim 1, characterized in that: When the second screen frame is immersed in the PI solution, the upper surface of the second screen frame faces the bottom surface of the transparent container.

10. The screen printing method according to claim 1, characterized in that: The pattern forming step includes: Preset a light temperature threshold so that the UV light irradiates the PI solution at the light temperature threshold; Preset a light exposure time threshold, so that the UV light irradiates the PI solution at the preset temperature for the light exposure time threshold; The thickness of the PI film can be controlled by presetting the illumination temperature and the illumination duration.

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