A method for making a screen printing plate and a screen printing plate

Abstract

The application relates to a screen plate making method and a screen plate and belongs to the technical field of screen printing, which comprises the following steps: selecting a screen frame according to the size of screen gauze and fixing the screen gauze on the screen frame; performing screen stretching on the screen gauze to make the screen gauze tight and reach a required tension to form a screen plate; cleaning and drying the screen plate; coating a photosensitive glue on the screen plate and drying the coated screen plate; performing printing surface exposure on the screen plate to make the photosensitive glue of the printing surface solidify; performing one-time ink surface exposure on the screen plate; performing developing and washing on the one-time exposed screen plate to form a required pattern; performing two-time ink surface exposure on the screen plate to make the photosensitive glue of the screen plate solidify comprehensively, and completing the screen plate making. The screen plate prepared through the above method has a neat and clear pattern edge, reduces the accumulation of ink on the printing surface of the screen plate in the transfer process, makes the pattern edge transferred to the printing material more neat and clear, and has the beneficial effect of facilitating the cleaning of the screen plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screen printing, in particular to a screen plate making method and a screen plate. BACKGROUND

[0002] Screen printing refers to using a screen as a plate base and making a screen plate with graphics by a photosensitive plate making method. Screen printing is composed of five elements, i.e. a screen plate, a squeegee, ink, a printing table and a printing object. It is printed by using the basic principle that the mesh holes of the graphic part of the screen plate can pass ink and the mesh holes of the non-graphic part cannot pass ink. During printing, ink is poured into one end of the screen plate, a certain pressure is applied to the ink part of the screen plate by the squeegee, and the squeegee is moved at a constant speed towards the other end of the screen plate. The ink is squeezed from the mesh holes of the graphic part to the printing object by the squeegee during the movement.

[0003] In the related art, a screen plate is composed of a screen frame and screen mesh, and the screen plate includes a printing surface and an ink surface. During preparation of the screen plate, the screen plate is coated with photosensitive glue, dried, exposed, developed, dried, and checked and corrected. The photosensitive glue is coated on the surfaces of the screen mesh in multiple layers and dried, a film is then attached to the printing surface of the screen plate (the film is composed of a black opaque pattern and a transparent base), and the printing surface of the screen plate is placed on the exposure table of an exposure machine with the printing surface facing down. The printing surface is irradiated by ultraviolet rays of the exposure machine, the photosensitive glue irradiated by the ultraviolet rays is cured, and the remaining photosensitive glue is dissolved in water. The screen plate is then placed in a developing tank, the uncured photosensitive glue is dissolved in water, and the screen plate is washed to form a pattern on the screen plate. After preparation, the screen plate is placed on the surface of a printing object, and the pattern is printed on the surface of the printing object by squeegeeing ink.

[0004] According to the related art described above, the inventors believe that the following defects exist. During preparation of the screen plate, the printing surface is exposed. During exposure, the ultraviolet rays need to pass through the exposure machine glass, the film and the screen mesh, resulting in refraction and scattering of the ultraviolet rays. The edges of the cured photosensitive glue are uneven, the edges of the pattern on the developed screen plate are uneven, and the edges of the printed pattern have shadows or burrs, thereby reducing the quality of screen printing. SUMMARY

[0005] To improve the above problems, the present application provides a screen plate making method and a screen plate.

[0006] The screen plate making method provided by the present application adopts the following technical scheme:

[0007] A screen plate making method, the method comprising:

[0008] selecting a screen frame according to the size of the screen mesh and fixing the screen mesh on the screen frame;

[0009] stretching the screen cloth to make the screen cloth tight and reach the required tension, forming a screen plate;

[0010] cleaning and drying the screen plate;

[0011] coating the screen plate with a photosensitive glue and drying the coated screen plate;

[0012] attaching a film to the printing surface of the screen plate, exposing the printing surface of the screen plate to light to make the photosensitive glue of the printing surface solidify;

[0013] firstly exposing the ink surface of the screen plate;

[0014] developing and washing the screen plate after the first exposure to form a required pattern;

[0015] secondly exposing the ink surface of the screen plate to make the photosensitive glue of the screen plate solidify completely, completing the preparation of the screen plate.

[0016] By adopting the technical scheme, the screen plate prepared has clear and neat pattern edges, and when the screen plate is used for pattern transfer, the accumulation of ink at the pattern edges of the screen plate can be reduced, the pattern edges transferred to the printing material are more neat and clear, and the printing quality is improved.

[0017] Preferably, the first exposure of the ink surface of the screen plate comprises: exposing the ink surface of the screen plate by an exposure device to make the surface layer of the photosensitive glue of the ink surface of the screen plate solidify.

[0018] By adopting the technical scheme, since the surface layer of the photosensitive glue of the ink surface has solidified, when the screen plate is washed, the photosensitive glue at the pattern edge position will not be washed away, and the photosensitive glue inside will not be washed away, reducing the probability of the generation of shadows or burrs at the pattern edge position.

[0019] Preferably, the first exposure of the ink surface of the screen plate comprises: exposing the ink surface of the screen plate by an exposure device to make the surface layer of the photosensitive glue of the ink surface of the screen plate solidify.

[0020] Preferably, the first wavelength of ultraviolet light is 380-450 nm, and the second wavelength of ultraviolet light is 360-370 nm.

[0021] By adopting the technical scheme, the first wavelength of ultraviolet light has strong penetrability, which is beneficial to the solidification of the photosensitive glue of the printing surface and the ink surface; and the second wavelength of ultraviolet light has weak penetrability, which is convenient for controlling the ultraviolet light energy, so that the surface layer of the photosensitive glue of the ink surface can be solidified.

[0022] Preferably, the exposure device comprises a frame, a main exposure device and an auxiliary exposure device, the main exposure device is arranged in the frame and is used for printing surface exposure and ink surface secondary exposure, and the auxiliary exposure device is arranged on the frame and is used for ink surface primary exposure.

[0023] Preferably, the main exposure device comprises an irradiation assembly, a pressing assembly and a driving assembly, the irradiation assembly comprises a main lamp and a placing plate, the main lamp is arranged in the frame and emits ultraviolet rays of a first wavelength, the placing plate is connected with the frame and is used for placing the screen printing plate and transmitting the ultraviolet rays of the first wavelength, the pressing assembly is used for pressing a side of the screen printing plate away from the placing plate, and the driving assembly drives the pressing assembly to move.

[0024] By using the above technical scheme, the printing surface of the screen printing plate is placed on the placing plate, the driving assembly drives the pressing assembly to press the ink surface of the screen printing plate, the main lamp is started, the ultraviolet rays of the first wavelength emitted by the main lamp pass through the placing plate and irradiate on the printing surface of the screen printing plate, the photosensitive glue coated on the printing surface is solidified, the refraction and scattering of the ultraviolet rays in the propagation process are reduced, the clarity of the solidified edge of the photosensitive glue on the printing surface is improved, and the effective utilization rate of the ultraviolet rays is improved.

[0025] Preferably, the pressing assembly comprises a pressing frame and a pressing cloth, the pressing frame comprises a cross support frame and a sliding frame, the sliding frame comprises at least two sliding rods which are connected with each other in sliding mode, the sliding directions of the at least two sliding rods are perpendicular to the length direction of the cross support frame, one of the at least two sliding rods is fixedly connected with the cross support frame, the sliding rod fixedly connected with the cross support frame is a first sliding rod, the pressing cloth is fixedly connected with the pressing frame, the pressing cloth is used for covering the placing plate, and the pressing cloth abuts against the screen printing plate.

[0026] By using the above technical scheme, when the exposure device is started, the pressing frame drives the pressing cloth to slide along the frame, the pressing cloth covers the placing plate and the screen printing plate placed on the placing plate, and the pressing cloth completely abuts against the ink surface of the screen printing plate; when the printing surface exposure is finished, the pressing frame drives the pressing cloth to slide along the frame, the pressing cloth is separated from the placing plate, and the ink surface is exposed.

[0027] Preferably, the driving assembly comprises a driving motor, a rotating shaft, a first gear, a moving rope, a transmission gear, a recovery rotating shaft, a second gear and a recovery rope, the driving motor is connected to the frame, the rotating shaft is coaxially fixed to the output shaft of the driving motor, one end of the moving rope is fixedly connected to the rotating shaft, the other end is connected to the first sliding rod, the first gear is coaxially fixed to the rotating shaft, the transmission gear is engaged with the first gear, the recovery rotating shaft is rotatable relative to the frame, the axial direction of the recovery rotating shaft is the same as that of the rotating shaft, the second gear is coaxially fixed to the recovery rotating shaft, the second gear is engaged with the transmission gear, one end of the recovery rope is fixedly connected to the recovery rotating shaft, and the other end is connected to the first sliding rod away from the moving rope.

[0028] By adopting the above technical scheme, when the driving motor drives the rotating shaft to rotate forward, the first gear drives the transmission gear and the second gear to rotate synchronously, the second gear drives the recovery rotating shaft to rotate, the recovery rope is wound, and the first sliding rod and other sliding rods are moved away from each other, so that the sliding rods and the cross support frame drive the compression cloth to be unfolded and covered on the placement plate; when the driving motor drives the rotating shaft to rotate reversely, the first gear rotates, the moving rope is continuously wound, the first sliding rod moves towards the other sliding rods, and the compression cloth is wound, so as to leave space for the exposure of the ink surface of the screen plate, and facilitate the exposure treatment of the ink surface.

[0029] Preferably, the auxiliary exposure device comprises an auxiliary exposure assembly and an auxiliary connecting assembly, the auxiliary connecting assembly comprises an auxiliary support, the auxiliary support is arranged on the frame, the auxiliary exposure assembly comprises a fixed plate, an auxiliary lamp tube and a light-transmitting cover, the fixed plate is rotatably connected to one end of the auxiliary support away from the frame, the auxiliary lamp tube is connected to the fixed plate, the auxiliary lamp tube emits ultraviolet rays of a second wavelength, the light-transmitting cover is connected to the fixed plate, and the auxiliary lamp tube is arranged in the mounting space between the fixed plate and the light-transmitting cover.

[0030] By adopting the above technical scheme, when the fixed plate is rotated to a position parallel to the plate surface of the placement plate, the fixed plate is located above the placement plate, after the compression frame and the compression cloth are wound, the auxiliary lamp tube is turned on, the ultraviolet rays emitted by the auxiliary lamp tube irradiate the ink surface of the screen plate, the surface layer of the photosensitive adhesive on one side of the ink surface is solidified, and when the screen plate is washed subsequently, the probability that the photosensitive adhesive on the pattern edge is washed away due to not being solidified is reduced.

[0031] A screen plate is prepared by using the plate making method in any one of the above 1 to 9.

[0032] By adopting the technical scheme, the screen printing plate prepared has clear edges of a pattern, and the probability of shadow and burr is greatly reduced, thereby making the pattern edges clear when the screen printing plate is used for transfer printing, and improving the printing quality.

[0033] To sum up, the present application has at least one of the following beneficial technical effects:

[0034] 1. After the printing surface of the screen printing plate is irradiated by the ultraviolet light of the first wavelength, the photosensitive glue on the printing surface is fully cured, the ink surface is then faced to the ultraviolet light of the second wavelength, the photosensitive glue on the surface of the ink surface of the screen printing plate is cured, and then the development is performed, the uncured photosensitive glue is dissolved, the screen printing plate is washed, the dissolved photosensitive glue is washed clean, and the cured photosensitive glue is partially formed into a pattern. Since the photosensitive glue on the surface of the ink surface is cured, when the screen printing plate is washed, the photosensitive glue at the edge position of the pattern will not be washed off, and the photosensitive glue inside will not be washed off, so that the pattern edge is free of shadow; then the ink surface is secondarily exposed, the photosensitive glue on the ink surface is fully cured, the pattern is clearer, the pattern edge is more uniform, and the printing quality is improved.

[0035] 2. By arranging the auxiliary exposure assembly, the auxiliary lamp is arranged in the mounting space of the fixed plate and the light transmission cover support, when the fixed plate is rotated to the position parallel to the plate surface of the placing plate, the fixed plate is above the placing plate, after the compression frame and the compression cloth are wound up, the auxiliary lamp is turned on, the ultraviolet light of the second wavelength emitted by the auxiliary lamp is used to irradiate the ink surface of the screen printing plate, so that the photosensitive glue on the surface of one side of the ink surface is cured, and when the screen printing plate is washed subsequently, the probability that the photosensitive glue at the edge of the pattern is washed off due to uncured is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a process flow chart for embodying the screen printing plate making method in the embodiment of the present application.

[0037] Figure 2 is a whole structure schematic diagram for embodying the exposure equipment in the embodiment of the present application.

[0038] Figure 3 is a structure schematic diagram for embodying the position relationship between the driving connection frame, the sliding block and the rack in the embodiment of the present application.

[0039] Figure 4 is an internal structure schematic diagram for embodying the position relationship and connection relationship between the components in the driving assembly in the embodiment of the present application.

[0040] Figure 5 is Figure 3 is a local enlarged view of A part in

[0041] Figure 6The separation schematic diagram between the sliding block and the sliding frame in the embodiment of the present application.

[0042] Figure 7 is Figure 6 is a partial enlarged view of B part in the embodiment of the present application.

[0043] Figure 8 is a comparison schematic diagram of the screen printing plate pattern prepared by the conventional process and the screen printing plate pattern prepared by using the process.

[0044] Figure 9 is a structure schematic diagram of the screen printing plate in the embodiment of the present application.

[0045] Mark explanation: 1, frame; 11, driving connection frame; 12, sliding block; 121, sliding groove; 122, moving groove; 123, pulley; 13, sealing washer; 2, main exposure device; 21, irradiation assembly; 211, placing plate; 22, driving assembly; 221, driving motor; 222, rotating shaft; 2221, winding wheel; 2222, first gear; 2223, moving rope; 223, transmission shaft; 2231, transmission gear; 224, recovery rotating shaft; 2241, recovery wheel; 2242, second gear; 2243, recovery rope; 23, compression assembly; 231, sealing frame; 232, cross support frame; 233, sliding frame; 2331, first sliding rod; 2332, second sliding rod; 2333, third sliding rod; 234, sliding pulley; 235, moving pulley; 236, first lock ring; 2361, buckle; 237, lock plate; 238, compression cloth; 3, auxiliary exposure device; 31, auxiliary exposure assembly; 311, fixed plate; 312, auxiliary lamp tube; 313, light transmission cover; 32, auxiliary connection assembly; 321, auxiliary support; 322, limiting block; 4, screen printing plate. DETAILED DESCRIPTION

[0046] The following will be described in detail in combination with the Figures 1-9 The present application will be further described in detail.

[0047] As Figure 1 shown, the embodiment of the present application discloses a screen printing plate making method, which comprises the following steps:

[0048] S1: selecting a screen frame, selecting a screen frame with a proper size according to the size of the screen gauze, and fixing the screen gauze on the screen frame;

[0049] S2: stretching the screen, cleaning the screen frame, uniformly applying glue on the rough surface, and placing it on the screen stretcher after the glue is dry. The chuck of the screen stretcher clamps the screen gauze around, and the chuck of the screen stretcher pulls the screen gauze outward, so that the screen gauze is stretched tightly and reaches the required tension. The stretched screen printing plate 4 is detached from the screen stretcher, and after 24 hours of static state, the tension is stabilized;

[0050] S3: cleaning and drying, with the help of brush dipped in degreasing agent, the grease and other dust on the screen gauze are cleaned, the adhesion of the photosensitive adhesive to the screen gauze is improved, and the screen printing plate 4 is dried;

[0051] S4: coating photosensitive adhesive and drying, after the screen printing plate 4 is dried, an appropriate amount of photosensitive adhesive is poured into the coating table, the screen printing plate 4 is placed on the coating table, and coating is performed by using the coating table. When coating for the first time, the coating method is 2+2, that is, the printing surface is coated with 2 knives (equivalent to 2 layers), and the ink surface is coated with 2 knives. After coating, it is placed in a 45-degree drying oven for drying, and after about 20 minutes, it is taken out and continues to be coated. At this time, according to the different mesh numbers of the screen gauze, the ink surface is coated with 2-4 knives, and the printing surface is coated with different knives according to different pattern requirements, and drying is performed again. After drying, the printing surface is coated to increase the thickness of the photosensitive adhesive according to the requirements of the photosensitive adhesive film thickness, and the screen printing plate 4 is dried after coating is completed;

[0052] S5: exposure of the printing surface, the film is attached to the printing surface of the screen printing plate 4 (the film is composed of a black opaque pattern and a transparent base), then the printing surface is placed downward on the exposure device so that the film is tightly attached to the glass of the exposure device, the exposure device is started, the lamp tube of the exposure device emits ultraviolet rays, which successively passes through the glass of the exposure device, the film, the photosensitive adhesive and the screen gauze, and the ultraviolet rays that pass through the transparent base and irradiate the photosensitive adhesive react and solidify. The part of the ultraviolet rays blocked by the black opaque pattern does not irradiate the photosensitive adhesive. The solidified photosensitive adhesive is insoluble in water, and the un-solidified photosensitive adhesive is soluble in water;

[0053] S6: one-time exposure of the ink surface, the screen printing plate 4 is placed on the exposure device, and the ultraviolet rays irradiate the ink surface of the screen printing plate 4, so that the photosensitive adhesive coated on the surface of the ink surface is solidified;

[0054] S7: development, the exposed screen printing plate 4 is placed in the developing tank, the screen printing plate 4 is wetted on both sides, and the un-solidified photosensitive adhesive is dissolved. Then, a high-pressure water gun is used, the gun head of the high-pressure water gun is aimed at the screen printing plate 4, and the screen printing plate 4 is uniformly washed. The washed part is the hollow part, and the remaining solidified photosensitive adhesive forms a pattern and is completely developed;

[0055] S8: two-time exposure of the ink surface, the screen printing plate 4 is placed on the exposure device, and the ultraviolet rays irradiate the ink surface of the screen printing plate 4, so that the photosensitive adhesive on the ink surface of the screen printing plate 4 is fully solidified;

[0056] As Figure 1As shown, it comprises a rack 1, a main exposure device 2 and an auxiliary exposure device 3, the main exposure device 2 and the auxiliary exposure device 3 are arranged on the rack 1, the auxiliary exposure device 3 is used for one-time exposure of the ink surface of the screen plate 4, the main exposure device 2 is used for exposure of the printing surface of the screen plate 4 and secondary exposure of the ink surface, so that the photosensitive adhesive coated on the screen plate 4 is fully cured, which is convenient for forming a pattern and improving the neatness and clarity of the pattern edge line.

[0057] As shown in the drawings, Figure 2 The main exposure device 2 comprises an irradiation assembly 21, the irradiation assembly 21 comprises a main lamp tube (not shown in the drawings) and a placing plate 211, a cavity is formed in the rack 1, and a plurality of main lamp tubes are fixedly connected to the rack 1 and located in the cavity. The main lamp tube emits ultraviolet rays of a first wavelength, and the wavelength range of the ultraviolet rays of the first wavelength is between 380-450 nm. The ultraviolet rays of this wavelength range are used to irradiate the printing surface of the screen plate 4, and the ultraviolet rays of this wavelength range have strong penetrability, which is beneficial to the curing of the photosensitive adhesive coated on the printing surface. The placing plate 211 is fixedly connected to the rack 1 and seals the cavity in the rack 1. The placing plate 211 is ordinary transparent glass, which is convenient for the ultraviolet rays emitted by the main lamp tube to penetrate the placing plate 211.

[0058] As shown in the drawings, Figure 3 and 4 The rack 1 is fixedly connected with a driving connecting frame 11, and the main exposure device 2 further comprises a driving assembly 22. The driving assembly 22 comprises a driving motor 221, a rotating shaft 222, a transmission shaft 223 and a recovery rotating shaft 224. The driving motor 221 is fixedly connected to the driving connecting frame 11. The rotating shaft 222 is coaxially fixedly connected with the output shaft of the driving motor 221, and the rotating shaft 222 rotates relative to the driving connecting frame 11. The rotating shaft 222 is coaxially fixedly connected with a winding wheel 2221 and a first gear 2222. The transmission shaft 223 is rotationally connected to the driving connecting frame 11, and the length direction of the transmission shaft 223 is consistent with that of the rotating shaft 222. The transmission shaft 223 is coaxially fixedly connected with a transmission gear 2231, and the transmission gear 2231 is engaged with the first gear 2222. The recovery rotating shaft 224 is rotationally connected to the driving connecting frame 11, and the length direction of the recovery rotating shaft 224 is consistent with that of the transmission shaft 223. The recovery rotating shaft 224 is coaxially fixedly connected with a recovery wheel 2241 and a second gear 2242, and the second gear 2242 is engaged with the transmission gear 2231.

[0059] As shown in the drawings, Figure 3As shown, the sealing gasket 13 is fixedly connected around the placement plate 211 on the frame 1. The main exposure device 2 further comprises a pressing assembly 23. The pressing assembly 23 comprises a pressing frame and a pressing cloth 238. The pressing frame comprises a sealing frame 231, a cross support frame 232 and a sliding frame 233. The sealing frame 231 is fixedly connected to the driving connection frame 11 and abuts against the sealing gasket 13. The sliding frame 233 is provided with two sliding frames 233, which are respectively arranged on opposite sides of the placement plate 211 and abut against the sealing gasket 13. The sliding frame 233 comprises a first sliding rod 2331, a second sliding rod 2332 and a third sliding rod 2333. One end of the third sliding rod 2333 is fixedly connected to the sealing frame 231, and the other end is slidingly connected to the second sliding rod 2332. The end of the second sliding rod 2332 away from the third sliding rod 2333 is slidingly connected to the first sliding rod 2331. The length direction of the cross support frame 232 is in the same direction as the length direction of the sealing frame 231, and the opposite ends of the cross support frame 232 are fixedly connected to the first sliding rod 2331. The pressing cloth 238 is fixedly connected to the sliding frame 233 on the opposite sides of the placement plate 211 and is unfolded and folded with the movement of the sliding frame 233. In order to facilitate the accommodation of the connection of the pressing cloth 238 when the sliding frame 233 is folded, a receiving groove is formed in the sliding frame 233, and the edge of the pressing cloth 238 is fixedly connected to the groove wall of the receiving groove. The pressing cloth 238 is black rubber soft cloth and is in a folded and stacked state when it is folded. When the pressing cloth 238 is unfolded with the sliding frame 233, the placement plate 211 can be covered.

[0060] As shown in Figure 5 , the cross support frame 232 is rotatably connected with a first locking ring 236 and a buckle 2361. When the first locking ring 236 is inserted into the buckle 2361, the buckle 2361 temporarily fixes the first locking ring 236. The frame 1 is fixedly connected with a lock plate 237 on the side away from the driving connection frame 11. The first sliding rod 2331 moves away from the second sliding rod 2332 and the third sliding rod 2333, and the cross support frame 232 moves to the side of the frame 1 away from the driving connection frame 11, and the first locking ring 236 is removed from the buckle 2361, rotated and clamped into the lock plate 237. The sliding frame 233, the cross support frame 232 and the sealing frame 231 are more closely abutted against the sealing gasket 13 on the frame 1 by external force.

[0061] As shown in Figure 4 , 6As shown in FIGS. 7, the rack 1 is fixedly connected with a sliding block 12, the length direction of the sliding block 12 is consistent with the sliding frame 233. The sliding block 12 is provided with a sliding groove 121 and a moving groove 122 along the length direction of the sliding block 12, the groove depth direction of the sliding groove 121 is perpendicular to the groove depth direction of the moving groove 122. The first sliding rod 2331 is rotatably connected with a sliding wheel 234 and a moving wheel 235, the sliding wheel 234 is located in the sliding groove 121 and moves along the sliding groove 121, and the moving wheel 235 is located in the moving groove 122 and moves along the moving groove 122.

[0062] The first sliding rod 2331, the second sliding rod 2332 and the third sliding rod 2333 are hollow, the winding wheel 2221 is fixedly connected with a moving rope 2223, one end of the moving rope 2223 away from the winding wheel 2221 passes through the cavities of the second sliding rod 2332 and the third sliding rod 2333 and extends into the cavity of the first sliding rod 2331 and is fixedly connected with the first sliding rod 2331; the recovery wheel 2241 is fixedly connected with a recovery rope 2243, the sliding block 12 is rotatably connected with a pulley 123, one end of the recovery rope 2243 away from the recovery wheel 2241 is fixedly connected with the side of the first sliding rod 2331 away from the moving rope 2223 through the pulley 123, the pulley 123 changes the moving path of the recovery rope 2243 and makes the recovery rope 2243 more smooth.

[0063] As shown in FIGS. 7, the rack 1 is fixedly connected with a sliding block 12, the length direction of the sliding block 12 is consistent with the sliding frame 233. The sliding block 12 is provided with a sliding groove 121 and a moving groove 122 along the length direction of the sliding block 12, the groove depth direction of the sliding groove 121 is perpendicular to the groove depth direction of the moving groove 122. The first sliding rod 2331 is rotatably connected with a sliding wheel 234 and a moving wheel 235, the sliding wheel 234 is located in the sliding groove 121 and moves along the sliding groove 121, and the moving wheel 235 is located in the moving groove 122 and moves along the moving groove 122. Figure 2 As shown in FIGS. 7, the rack 1 is fixedly connected with a sliding block 12, the length direction of the sliding block 12 is consistent with the sliding frame 233. The sliding block 12 is provided with a sliding groove 121 and a moving groove 122 along the length direction of the sliding block 12, the groove depth direction of the sliding groove 121 is perpendicular to the groove depth direction of the moving groove 122. The first sliding rod 2331 is rotatably connected with a sliding wheel 234 and a moving wheel 235, the sliding wheel 234 is located in the sliding groove 121 and moves along the sliding groove 121, and the moving wheel 235 is located in the moving groove 122 and moves along the moving groove 122.

[0064] After the printing surface is exposed, the drive motor 221 drives the rotating shaft 222 to rotate in the opposite direction. The first gear 2222 rotates in the opposite direction and drives the transmission gear 2231 and the second gear 2242 to rotate synchronously. The moving rope 2223 is continuously wound onto the take-up wheel 2221, and the take-up rope 2243 is continuously released, causing the first sliding rod 2331 to move closer to the second sliding rod 2332 and the third sliding rod 2333, and driving the pressing cloth 238 to be wound into a folded shape, making room for the ink surface of the screen printing plate 4 to be exposed.

[0065] like Figure 2 As shown, the auxiliary exposure device 3 includes an auxiliary exposure assembly 31 and an auxiliary connection assembly 32. The auxiliary connection assembly 32 includes an auxiliary bracket 321 and a limiting block 322. The auxiliary exposure assembly 31 includes a fixing plate 311, auxiliary lamps 312, and a light-transmitting cover 313. The auxiliary bracket 321 is fixedly connected to the frame 1, and the fixing plate 311 is rotatably connected to the auxiliary bracket 321. The auxiliary bracket 321 has a storage space for placing the fixing plate 311. The limiting block 322 is fixedly connected to the auxiliary bracket 321 and abuts against the fixing plate 311. The light-transmitting cover 313 is detachably connected to the fixing plate 311, and an installation space is formed between the light-transmitting cover 313 and the fixing plate 311. Multiple auxiliary lamps 312 are provided and all are fixedly connected to the fixing plate 311. The multiple auxiliary lamps 312 are all located in the installation space and are evenly arranged. The auxiliary lamp 312 emits ultraviolet light of a second wavelength, which is in the range of 360-370nm. This wavelength of ultraviolet light is selected to expose the ink surface of the screen printing plate 4. This wavelength has weak penetration, which is beneficial to the curing of the photosensitive emulsion layer on the surface of the ink surface of the screen printing plate 4.

[0066] like Figure 8 As shown, after the printed surface is exposed, the fixing plate 311 is rotated from the storage space until it abuts against the limiting block 322. At this time, the surface of the fixing plate 311 is parallel to the surface of the placement plate 211 and is located above the placement plate 211. The auxiliary lamp tube 312 is turned on, and the second wavelength ultraviolet light emitted by the auxiliary lamp tube 312 exposes the ink surface of the screen printing plate 4 once, so that the photosensitive emulsion on one side of the ink surface is cured. After the exposure, the screen printing plate 4 is rinsed with a high-pressure water gun. Since the photosensitive emulsion on the surface of the ink surface has been cured, the photosensitive emulsion sandwiched between the printed surface and the ink surface, although not cured, can still remain on the screen printing plate 4. After rinsing and drying, the ink surface is exposed a second time using the first wavelength ultraviolet light, so that the photosensitive emulsion coated on the ink surface that has not been rinsed off is fully cured, making the edges of the pattern formed on the screen printing plate 4 neater.

[0067] like Figure 9As shown, when printing, the printing surface of the screen 4 is placed on the printing material, and the ink is transferred to the printing material through the hollow part on the screen 4. Since the edges of the pattern on the screen 4 are neat, the accumulation of ink at the edges of the pattern can be reduced when the ink is transferred, the screen can be cleaned easily, and the edges of the transferred pattern are clearer.

[0068] The embodiment of the present application also discloses a screen printing plate, as shown in the drawings. Figure 8 The printing surface and the ink surface are prepared by the above method.

[0069] The principle of the method for manufacturing the screen printing plate is as follows.

[0070] The printing surface of the screen 4 is placed on the placing plate 211, and then the driving motor 221 is started to drive the rotating shaft 222 to rotate in the forward direction, so that the moving rope 2223 is continuously released, the recovery rope 2243 is continuously wound, the horizontal support frame 232 and the sliding frame 233 are moved, the horizontal support frame 232 is moved to be close to the lock plate 237, the pressing cloth 238 covers the placing plate 211, the first lock ring 236 is taken out of the buckle 2361 and is rotated, and then the first lock ring 236 is buckled with the lock plate 237, so that the connection between the pressing frame and the sealing gasket 13 is more closely.

[0071] The main lamp tube and the vacuum chamber are started to irradiate the photosensitive glue coated on the printing surface of the screen 4, so that the photosensitive glue is cured; the driving motor 221 drives the rotating shaft 222 to rotate in the reverse direction, so that the moving rope 2223 is continuously wound, the recovery rope 2243 is continuously released, the sliding frame 233 and the horizontal support frame 232 are moved towards the sealing frame 231, and the pressing cloth 238 is wound, so that the ink surface of the screen 4 is exposed.

[0072] The auxiliary lamp tube 312 is started to preliminarily irradiate the ink surface of the screen 4, so that the surface layer of the photosensitive glue on the ink surface is cured. Then, the screen 4 after exposure is placed in the developing water tank to dissolve the uncured photosensitive glue.

[0073] After washing and drying, the main lamp tube is used to irradiate the ink surface of the screen 4, so that the photosensitive glue on the ink surface is fully cured.

[0074] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A method for making a screen printing plate, characterized in that... The method includes: selecting a screen frame according to the size of the mesh and fixing the mesh to the frame; stretching the mesh to make it taut and reach the required tension to form a screen printing plate (4); cleaning and drying the screen printing plate (4); coating the screen printing plate (4) with photosensitive emulsion and drying the coated screen printing plate (4); attaching a film to the printing surface of the screen printing plate (4) and exposing the printing surface of the screen printing plate (4) to cure the photosensitive emulsion on the printing surface; exposing the screen printing plate (4) to the ink surface once; and exposing the screen printing plate (4) to the ink surface once. The screen printing plate (4) is developed and washed to form the desired pattern; the screen printing plate (4) is subjected to a second exposure on the ink surface to fully cure the photosensitive emulsion on the screen printing plate (4) and complete the plate making; the first exposure on the ink surface of the screen printing plate (4) includes: exposing the screen printing plate (4) to the ink surface using an exposure device to cure a layer of photosensitive emulsion on the ink surface of the screen printing plate (4); the first wavelength ultraviolet light is used for the exposure of the printing surface and the second exposure on the ink surface, and the second wavelength ultraviolet light is used for the first exposure on the ink surface. Ultraviolet light, the first wavelength being greater than the second wavelength; the ultraviolet wavelength of the first wavelength is 380-450nm, and the ultraviolet wavelength of the second wavelength is 360-370nm; the exposure equipment includes a frame (1), a main exposure device (2), and an auxiliary exposure device (3), the main exposure device (2) being located inside the frame (1) for exposure of the printed surface and secondary exposure of the ink surface, and the auxiliary exposure device (3) being located on the frame (1) for primary exposure of the ink surface; the main exposure device (2) includes an irradiation component (21), a pressure... The assembly includes a clamping component (23) and a driving component (22). The irradiation component (21) includes a main lamp tube and a placement plate (211). The main lamp tube is located inside the frame (1) and emits ultraviolet light of a first wavelength. The placement plate (211) is connected to the frame (1) and is used to place the screen printing plate (4) and transmit ultraviolet light of the first wavelength. The clamping component (23) is used to clamp the screen printing plate (4) on the side away from the placement plate (211). The driving component (22) drives the clamping component (23) to move.

2. The method for making a screen printing plate according to claim 1, characterized in that: The pressing assembly (23) includes a pressing frame and a pressing cloth (238). The pressing frame includes a cross brace (232) and a sliding frame (233). The sliding frame (233) includes at least two sliding rods that are slidably connected to each other. The sliding direction of the at least two sliding rods is perpendicular to the length direction of the cross brace (232). One of the at least two sliding rods is fixedly connected to the cross brace (232). The sliding rod fixedly connected to the cross brace (232) is the first sliding rod (2331). The pressing cloth (238) is fixedly connected to the pressing frame. The pressing cloth (238) is used to cover the placement plate (211). The pressing cloth (238) abuts against the screen printing plate (4).

3. The method for making a screen printing plate according to claim 2, characterized in that: The drive assembly (22) includes a drive motor (221), a rotating shaft (222), a first gear (2222), a moving rope (2223), a transmission gear (2231), a recovery rotating shaft (224), a second gear (2242), and a recovery rope (2243). The drive motor (221) is connected to the frame (1). The rotating shaft (222) is coaxially fixed with the output shaft of the drive motor (221). One end of the moving rope (2223) is fixedly connected to the rotating shaft (222), and the other end is connected to the first sliding rod (2331). The first gear (2222) is coaxial. Fixed on the rotating shaft (222), the transmission gear (2231) meshes with the first gear (2222), the recovery rotating shaft (224) rotates relative to the frame (1), the axial direction of the recovery rotating shaft (224) is the same as the axial direction of the rotating shaft (222), the second gear (2242) is coaxially fixed on the recovery rotating shaft (224), the second gear (2242) meshes with the transmission gear (2231), one end of the recovery rope (2243) is fixedly connected to the recovery rotating shaft (224), and the other end is connected to the side of the first sliding rod (2331) away from the moving rope (2223).

4. The method for making a screen printing plate according to claim 3, characterized in that: The auxiliary exposure device (3) includes an auxiliary exposure assembly (31) and an auxiliary connection assembly (32). The auxiliary connection assembly (32) includes an auxiliary support (321) which is mounted on the frame (1). The auxiliary exposure assembly (31) includes a fixed plate (311), an auxiliary lamp (312), and a light-transmitting cover (313). The fixed plate (311) is rotatably connected to the end of the auxiliary support (321) away from the frame (1). The auxiliary lamp (312) is connected to the fixed plate (311) and emits ultraviolet light of a second wavelength. The light-transmitting cover (313) is connected to the fixed plate (311) and is located in the installation space formed between the fixed plate (311) and the light-transmitting cover (313).

5. A screen printing plate, characterized in that: The plate-making method according to any one of claims 1 to 4 is used for plate making.

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