CN113815298B - Screen printing plate for screen printing - Google Patents
Screen printing plate for screen printing Download PDFInfo
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- CN113815298B CN113815298B CN202111235673.1A CN202111235673A CN113815298B CN 113815298 B CN113815298 B CN 113815298B CN 202111235673 A CN202111235673 A CN 202111235673A CN 113815298 B CN113815298 B CN 113815298B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
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- Manufacture Or Reproduction Of Printing Formes (AREA)
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Abstract
A screen printing plate for screen printing, comprising the steps of: s1, manufacturing a net yarn; s2, tightening and fixing the screen gauze with the size required by the screen plate to be manufactured on the screen frame; s3, spraying a liquid substance which is not dissolved by an organic solvent after solidification onto a printing surface of the omentum gauze opposite to the omentum in a liquid point mode by using a digital precise spraying device to form a dot matrix type solidified film; s4, after the solidified film is solidified by adopting an illumination, heating or natural drying device, heating the omentum corresponding to the area where the pattern is positioned or heating the whole omentum by adopting a heating mode, and removing the omentum which is heated, contracted and melted. The liquid substance is AB glue or UV ink, which solves the problem that a plastic film is easy to damage, does not need to wash a screen plate to develop, saves water resources, has no toxicity to human bodies, does not pollute the environment, and has the advantages of high strength, good adhesive force, scrubbing resistance and high gloss, and the liquid substance is organic solvent resistance.
Description
Technical Field
The application relates to screen plate making, in particular to a screen printing plate required by screen printing.
Background
Currently, there are two types of conventional screen plate making and digital plate making which are commonly used in the market:
1. the traditional plate making process includes fixing silk screen onto screen frame, coating photosensitive slurry or photoresist, designing printed pattern with design software, making film, adhering film onto the printed surface of the silk screen, exposing in exposure machine, developing with water, and drying.
There are three plate making methods, direct plate making method: coating photosensitive paste with a certain thickness on the stretched screen plate, drying after coating, then using plate-making negative film to attach with the plate-making negative film, placing the plate-making negative film into a plate-copying machine for exposure, developing and drying so as to obtain the screen printing screen plate. Indirect plate making method: the indirect plate making method comprises exposing indirect film with 1.2% H 2 0 2 Developing with warm water after hardening, drying to obtain strippable film, sticking film surface of film to stretched silk screen, sticking film to wet silk screen by extrusion, removing film base, and air drying to obtain screen printing plate. Direct-to-indirect hybrid plate making method: firstly, the photoresist layer is dried by water, alcohol or photoresist on a screen frame of a silk screen, then the film base of the photoresist film is uncovered, and then the silk screen is manufactured after the printing down and developing treatment.
The disadvantages of the three plate making methods are: after exposure, a large amount of water is needed to wash away the photosensitive paste or photoresist at the unexposed part of the screen plate to display the pattern, a large amount of water resources are needed to be wasted, and the photosensitive paste or photoresist adopts chromate and diazonium salt as photosensitizers.
2. The digital platemaking process includes heating silk screen selectively with heat head to form hole and laser to perforate the silk screen directly, fixing resin film silk screen onto the screen frame, designing printed pattern with design software and transmitting the printed pattern to screen making equipment, and the screen making equipment has heat head to heat the film on the silk screen selectively to form screen printing plate with controllable mesh size. The laser plate making process includes fixing plastic resin sheet or stainless steel sheet onto screen frame, designing printed pattern with design software, transmitting the printed pattern to screen making equipment for making screen, and laser partial melting and perforating to form the printed screen.
The defects of the two digital platemaking manufacturing processes are as follows: the plastic and resin film of the resin film silk screen are not resistant to organic solvents, the screen printing plate cannot be cleaned after the printing with oily ink, the plastic film is very easy to be physically damaged, the screen printing plate is damaged [ the ink on the screen printing plate can be scrubbed cleanly after the printing with the oily ink, the screen printing plate is required to be scrubbed cleanly with organic solvents (toluene, xylene, butyl acetate, cyclohexanone, isopropanol and the like), but the resin film layer in the screen printing plate is not resistant to the organic solvents, and the resin film layer on the screen printing plate is easy to be physically damaged, so that the screen printing plate is damaged ]. The laser plate-making perforated plate has uneven residues, is not easy to clear, is easy to block meshes in the clearing process, and has high price.
Disclosure of Invention
The application aims to solve the technical problem of providing a screen printing plate which is low in cost, resistant to acid and alkali and organic solvent corrosion and long in service life and is required for screen printing.
In order to solve the technical problems, the following technical scheme is adopted:
the screen printing plate for screen printing includes screen gauze and screen frame for tightening and fixing the screen gauze, and features that one layer of cured film is set on the screen gauze to eliminate the area of the pattern to be printed on the screen gauze, and the cured film is produced with liquid matter resisting organic solvent solution and through spraying with digital precise spraying device, irradiation, heating or natural drying.
The frame of the net frame is rectangular and is formed by enclosing four side strips, each side strip is provided with a brace and a pressing strip, the top of each side strip is provided with a strip-shaped panel strip groove, each panel strip groove is internally provided with a rod-shaped brace in an adaptive manner, each brace is provided with a strip-shaped pressing strip groove, and the pressing strip is arranged in the pressing strip groove and tightens the net yarn on the net frame.
The solidified film is formed by connecting a plurality of liquid points, the diameter of each liquid point is not more than 0.2mm, and the distance between the centers of adjacent liquid points is not more than 0.2mm.
The cured film is prepared by the following method:
1) Spreading and unfolding the gauze by using winding and unwinding equipment, coating an adhesive layer on the non-printing surface of the gauze, and then spraying thermoplastic resin onto the adhesive layer by using a film spraying equipment to form a gauze consisting of the gauze and the gauze, or directly spraying a waxy material onto the non-printing surface by using the film spraying equipment to form the gauze consisting of the gauze and the gauze;
2) Tightening and fixing the screen gauze with the required size of the screen plate to be manufactured on a screen frame;
3) Spraying the liquid substance onto a printing surface of the omentum yarn opposite to the omentum in a form of liquid dots by using a digital precise spraying device to form a dot matrix type solidified film;
4) And (3) after the solidified film is solidified by adopting an illumination, heating or natural drying device, heating the omentum corresponding to the area where the pattern is positioned in a heating mode, and removing the omentum which is heated to shrink and melt, or heating the whole omentum, and removing the omentum which is heated to shrink and melt.
The omentum yarn is manufactured by the following method:
1) The gauze passes through the roller in a tangential mode with the roller attached with the adhesive, and the thickness of the adhesive layer on the roller is adjusted through a gap between an adjusting scraper arranged beside the roller and the roller;
2) Heating the gauze coated with the adhesive layer by a heating device to coagulate the adhesive layer;
3) Spraying thermoplastic resin on the coagulated adhesive layer to form a layer of net film;
or alternatively, the process may be performed,
1) The gauze passes through the roller in a tangential manner to the roller;
2) And directly spraying the wax material in a molten state onto the non-printing surface to form a layer of net film.
The cured film is prepared by the following method:
1) Installing the screen frame stretched with the screen gauze on a positioning bracket of the digital precise spraying device in a mode that the printing surface faces upwards;
2) Starting a digital precise spraying device to enable a spray head on the digital precise spraying device to be arranged in the screen frame;
3) The spray head moves according to a set program under the control of a main control circuit of the digital precise spraying device, the liquid substance is sprayed on the printing surface according to the residual area graph after the printing pattern is removed to form a solidified film, and the spray head can rotate and/or incline according to the received instruction;
4) And (3) placing the net film yarn sprayed with the curing film in heating equipment, illumination equipment or natural environment, and curing the curing film.
The method for removing the web film which is heated to shrink and melt is as follows:
1) Placing the net film yarn after the curing of the curing film in a heating device with the temperature not less than 64 ℃;
2) And a heating component in the heating device is arranged at one side of the omentum, a heating body in the heating component moves along the transverse direction or the longitudinal direction of the omentum yarn in a scanning mode, and the heating body is directly or indirectly contacted with the omentum.
The adhesive layer is made of polyurethane; the thickness of the adhesive layer is 0.002mm-0.02mm; the thickness of the net film is 0.001mm-0.01mm.
The method for absorbing the melted omentum is as follows:
1) The heating component consists of a heating body and a fiber sheet, one surface of the fiber sheet is contacted with the net film, the other surface of the fiber sheet is connected with the heating body, and the heating body moves transversely or longitudinally along the surface contacted with the fiber sheet;
2) After the fiber sheet is heated, heat energy is conducted to the net film, and the melted net film is absorbed by the fiber sheet;
3) The fibrous sheet has a thickness of no more than 0.2mm.
In the process of manufacturing the screen printing plate, the liquid substance used can be AB glue or UV ink, and the liquid substance is sprayed on the printing surface of the screen printing plate. The hardness of the cured film is more than or equal to 90HA, so that the cured film HAs the properties of high mechanical strength, high gloss and scratch resistance, and the service life of the screen plate can be greatly prolonged. Because the liquid substance has good adhesive force, the liquid substance can be tightly adhered with the resin net film into a whole after solidification, the strength of the residual area after removing the printed pattern is further enhanced, the occurrence probability of ink leakage is reduced, the development of the screen printing plate is not required to be washed, water resources are saved, the liquid substance does not contain dichromate, the liquid substance has no toxicity to human bodies, the pollution to the environment is avoided, and the thickness of the film is not more than 0.02mm, so that the penetrability of the net yarn is not influenced when the liquid substance is heated and contracted to the edge.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a digital precision spraying apparatus;
FIG. 2 is a diagram showing the translational direction of the digital precision spraying device;
FIG. 3 shows the spray direction of the digital precision spray device;
FIG. 4 is an enlarged view of a print head;
FIG. 5 is a schematic diagram of a frame membrane plate structure;
FIG. 6 is an exploded view of a layering plate making;
FIG. 7 is a schematic diagram of a layering plate-making spin chuck;
FIG. 8 is an enlarged view of the riblet of FIG. 6;
FIG. 9 is an enlarged view of the molding of FIG. 6;
FIG. 10 is a schematic view of another embodiment of a layering plate;
FIG. 11 is an exploded view of another embodiment of a layering plate;
FIG. 12 is a schematic view of the bead prior to locking;
fig. 13 is a schematic view of the bead after locking.
The reference numerals are as follows:
base 1, base 2, frame membrane plate 3, shower nozzle subassembly 4, degree of freedom motion platform 5, heating device 6, slide rail 7, screen frame 31, gauze 32, omentum 33, brace 34, layering 35, screw 36, pressure head 37, spanner 38, fillet groove 39, layering groove 40, clamping edge 401, shower nozzle 41, X-axis rotating subassembly 42, Y-axis rotating subassembly 43, Y-axis translation subassembly 51, Z-axis translation subassembly 52, X-axis translation subassembly 53.
Detailed Description
As shown in fig. 1 to 13, the screen printing plate required for screen printing of the present application is produced by the steps of:
step 1, firstly, manufacturing a omentum yarn, which comprises the following two methods:
1) Spreading and unwinding the gauze by using a winding and unwinding device, coating an adhesive layer on the non-printing surface of the gauze 32, and then spraying a thermoplastic resin onto the adhesive layer by using a film spraying device to form a layer of film, wherein the layer of film is called a net film 33, the net film 33 completely seals the non-printing surface, and a semi-finished product consisting of the gauze 32 and the net film 33 is called a net film gauze hereinafter.
2) The waxy material is directly coated on the non-printing surface of the gauze 32 by a coating device to form a layer of film, the layer of film is called a gauze 33, the non-printing surface is completely sealed by the gauze 33, and a semi-finished product formed by the gauze 32 and the gauze 33 is called a gauze hereinafter.
Step 2, selecting the size of the screen yarn according to the screen plate to be manufactured
The finished omentum yarn (in which the omentum 33 is condensed into a layer of non-flowable film) is mounted on a screen stretching machine in a way that the non-printing surface faces upwards, the periphery of the omentum frame 31 is coated with adhesive, the omentum yarn is stretched and fixed on the selected omentum frame 31 or directly cut, the size of the cut omentum yarn is slightly larger than the outer edge size of the omentum frame 31, and then the omentum yarn is clamped into the omentum frame 31 and the braces 34 are pulled to be locked into the framed membrane plate.
Step 3, spraying an acid-alkali corrosion-resistant and organic solvent corrosion-resistant cured film on the net film yarns of the frame film plate
1) Liquid materials which are curable and insensitive to organic solvents, acids and/or bases after curing, such as materials which are curable under light or heat, or materials which are curable in the natural environment, are selected.
2) And injecting the liquid substance into the digital precise spraying device.
3) Starting a digital precise spraying device to spray liquid substances onto the omentum gauze in the form of liquid dots to form a dot matrix type solidified film, wherein the solidified film is sprayed on a printing surface opposite to the omentum 33, and the area range of the solidified film is the area remained after the pattern to be printed is removed.
4) The cured film forms a closed structure on the printed surface in the non-printed pattern area that closes the mesh openings in the veil.
Step 4, formation of Screen 3
After the cured film is cured by using an illumination, heating or natural drying device, the heating mode is adopted to heat the net film 33 corresponding to the area where the pattern is located, so as to remove the heated and contracted and melted net film 33, or the whole net film 33 is heated, so as to remove the heated and contracted and melted net film 33.
The application firstly sets a layer of net film on the net yarn 32, which has the function of providing a supporting plane for liquid substances in liquid spots when spraying the solidified film, thus effectively avoiding the phenomenon that the liquid spots leak from the meshes on the net yarn, thereby obtaining a layer of flat and compact solidified film and finally preparing the required net plate.
The greatest advantage of the method of the present application over the prior art is that the curable liquid substance is sprayed onto the printed surface of the veil, heating and removing the film 33 which shrinks and melts when heated in the non-printed pattern areas. Thus, the problems that the plastic net film 33 is not resistant to organic solvents and the net film 33 is weak in mechanical strength and easy to damage can be solved, meanwhile, the plastic net film is free from toxicity to human bodies and pollution to the environment, and meanwhile, the prepared screen printing plate can be applied to water-based ink printing and oil-based ink printing.
1. The omentum yarn is manufactured by the following method:
1) Omentum gauze composed of wax material omentum
S1, loading a large parent-roll-shaped gauze on a discharging shaft of a yarn winding device, enabling a non-printing surface to face downwards, enabling the unwinding tension to be not more than 250N, flatly spreading and unfolding the gauze 32, and enabling the gauze 32 to uniformly pass under a film spraying component of the film spraying device at a speed of not more than 50m/min at a position 2m away from the discharging shaft;
s2, uniformly spraying a wax material in a molten state (the wax material is heated and melted to be liquid at the temperature of 47-130 ℃ at the position 10mm above the non-printing surface of the gauze 32) through a spray head on a film spraying component of a film spraying device, and forming a wax gauze 33 on the non-printing surface, wherein the spraying amount is not more than 15g/m 2 ；
S3, in order to achieve more flatness of the net film, two pressing wheels are arranged at the position of the 0.5m of the film spraying assembly after film spraying, the upper pressing wheel is a rubber wheel with the diameter of 200mm, the lower pressing wheel is a stainless steel roller with the diameter of 400mm, the two pressing wheels are horizontally arranged in the vertical direction, and the gap between the two pressing wheels is controlled to be 0.002-0.02mm larger than the thickness of the net yarn, so that the net film 33 is tightly attached to the net yarn 32;
s4, rewinding the non-printing surface of the net film gauze inwards by using a material receiving shaft at a position 2m away from the pinch roller, wherein the winding tension is not more than 250N, and forming a large mother roll of the film gauze, namely the net film gauze.
2) Net yarn composed of thermoplastic resin net film
The thermoplastic resin may be one or a combination of several of Polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP) and Polystyrene (PS).
S1, loading a large parent-roll-shaped gauze 32 on a discharging shaft of a yarn winding device, wherein a non-printing surface faces downwards, and the unwinding tension is not more than 250N;
s2, the position which is 2m away from the discharging shaft is tangent to the rubberized roller under the non-printing surface of the gauze 32, so that the adhesive on the rubberized roller is transferred to the non-printing surface of the gauze 32. The adhesive in the adhesive groove right below the adhesive roller is brought to the adhesive roller scraper by the anticlockwise rotation of the adhesive roller, the thickness of the adhesive layer on the adhesive roller is controlled by adjusting the gap between the adhesive roller and the side scraper of the adhesive roller, which is far away from the discharging shaft, and the acrylic or epoxy or polyurethane resin adhesive with the thickness of 0.002-0.02mm is coated on the non-printing surface of the gauze 32.
S3, enabling a non-printing surface to rotate upwards through a stainless steel steering wheel with the diameter of 800mm after gluing, enabling the non-printing surface to pass through heating equipment above a material collecting and discharging shaft at the speed of 10-30m/min, enabling the length of the heating equipment to be 10-30m, enabling the temperature to be not more than 130 ℃, enabling a stainless steel carrier roller to bear the movement of a gauze 32 in a heating equipment box, enabling a position, which is 2m away from the heating equipment, of the gauze 32 and is 10mm away from the position, which is right above the non-printing surface of the gauze 32, enabling thermoplastic resin in a molten state to be evenly sprayed through a spray head on a film spraying component of a film spraying equipment, and forming a resin net film 33 on an adhesive of the non-printing surface of the gauze, wherein the spraying amount of the resin net film is not more than 15g/m 2 。
S4, in order to increase the bonding strength of the gauze 32 and the omentum, two pinch rollers are arranged at the position of 0.5m of the membrane spraying assembly after the membrane spraying, the upper pinch roller is a rubber roller with the diameter of 200mm, the lower pinch roller is a stainless steel roller with the diameter of 400mm, the two pinch rollers are horizontally arranged in the vertical direction, the gap is adjusted to be 0.002-0.02mm larger than the thickness of the gauze, the resin omentum 33 is tightly bonded with the gauze 32, the non-printing surface is rotated downwards through a stainless steel steering wheel with the diameter of 800mm at the position of 1m of the pinch roller, the non-printing surface of the omentum is rewound inwards by a material collecting shaft at the position of 2m from the stainless steel steering wheel, and the winding tension is not more than 250N, so that the large parent roll of the thin film omentum, namely the omentum, is formed.
2. Liquid material spraying method
1. The liquid material comprises the following components:
1) Liquid substance of photosensitive type
Comprises main resin, monomer, photoinitiator and additive (additive comprises defoamer, antioxidant and accelerator), pigment content (pigment can be added in the application, preferably pigment is not added), wherein the components are configured as follows by weight percent:
main resin: 30% -50%;
monomer (C): 35% -45%;
and (3) a photoinitiator: 5% -10%;
additive: 3% -15%;
the liquid materials are prepared as follows:
the light-cured liquid substance is cured by ultraviolet irradiation, such as UV ink, the main resin, the monomer, the pigment content, the additive and the photoinitiator are poured into a clean stainless steel barrel according to a fixed weight ratio (such as 40 percent: 8 percent: 5 percent: 7 percent) in a dark space as far as possible, and the mixture is continuously stirred for 1min by a stirrer with the speed of 200r/min, sealed and preserved for standby, and the effective period is 24h.
2) Thermosensitive liquid substance
The film-forming material comprises two liquid materials, wherein one is a film-forming material and the other is a hardening agent, the film-forming material is acrylic acid or epoxy or polyurethane resin (hereinafter referred to as liquid resin), when spraying, the liquid resin is sprayed onto the net film yarn, and then the hardening agent is sprayed onto a film formed by the liquid resin, so that the hardening agent is uniformly mixed with the liquid resin on the surface of the film formed by the liquid resin, and the optimal hardening reaction is achieved. The weight ratio of the liquid resin to the hardener is (1-5): 1.
The liquid materials are prepared as follows:
the liquid characteristic is solidified by high temperature or natural drying, such as AB glue, respectively placing acrylic acid or epoxy or polyurethane resin and hardener according to weight ratio (1-5): 1 into two clean stainless steel barrels respectively, sealing and preserving for standby.
2. Spray coating method
1) Method one (method for producing a photosensitive-based cured film):
s1, connecting a computer with a digital spraying device, and introducing the designed patterns (the patterns can be single words, idioms, poems, animals, mountains, figures, animation, art drawing, ancient images or printed circuits and the like) into the digital spraying device;
s2, two plate making methods
S2.1, a traditional plate making method can be adopted:
the non-printing side of the screen yarn is fixed to the screen 31 in an upward direction: the non-printing surface of the omentum screen of the application is stretched upwards by a screen stretching machine, the required tension is controlled (the tension is controlled to be 8-20N), a proper amount of adhesive is coated on the periphery of the upper part of the omentum screen 31, the omentum screen 31 coated with the adhesive is adhered on the printing surface of the stretched omentum screen and fixed by a bracket, the omentum screen is cut along the edge of the omentum screen 31 after the adhesive is solidified, and the omentum screen is adhered and reinforced on the edge of the omentum screen by a self-adhesive tape to form the omentum screen 3.
S2.2 the preferred layering plate making method of the application:
referring to fig. 6 to 13, the frame of the net frame 31 is rectangular and is formed by four side strips, and each side strip is provided with a brace 34 and a pressing strip 35.
An elongated molding groove 39 is provided at the top of the side bar, and the cross-sectional shape of the molding groove 39 is rectangular. A rod-shaped brace 34 is adaptively embedded in each molding groove 39, the length of the brace is smaller than or equal to the length of the molding groove 39, the width of the brace is smaller than the width of the molding groove 39, the brace 34 is a hollow profile, a strip-shaped hollow part of the brace 34 is arranged at the top of the brace, the hollow part is hereinafter called a layering groove 40, and the layering 35 is arranged in the layering groove 40.
The pressing bar 35 is in a rod shape, the length of the pressing bar 35 is the same as that of the pressing bar groove 40, the pressing bar is composed of a pressing head 37 and a wrench 38 which are integrally formed, the cross section of the pressing head 37 is in a major arc shape (namely, the shape of a part of a circle which is larger than a semicircle after being cut by a chord) and is used for pressing the side of the omentum yarn in the pressing bar groove 40, the inner end of the wrench 38 is integrally connected with a chord straight part on the pressing head 37, and the wrench 38 is parallel to the chord of the chord straight part, so that an operator can conveniently rotate the pressing head 37.
The top ends of the two strip side walls of the layering groove 40 are provided with inwards extending clamping edges 401, and the gap distance between the two clamping edges 401 is slightly smaller than the diameter of the pressing head 37 but larger than the thickness of the major arc bow of the pressing head 37, so that the whole pressing head 37 is conveniently placed in the layering groove 40.
The width of the interior space of the bead groove 40 (i.e., the distance between the two elongated side walls) is slightly greater than or equal to the diameter of the ram 37, and the depth of the bead groove 40 is slightly greater than the thickness of the ram 37, thus facilitating the rotation of the ram 37 within the bead groove 40.
Each of the side surfaces of the frame 31 is provided with a tension screw 36 for moving the stay 34 inside and outside the molding groove 40 in the width direction of the molding groove 39 (each side surface is provided with at least one tension screw, preferably three tension screws for each side surface, in the present application), that is, a screw hole is provided in the long side wall of the stay 34, the tension screw is screwed into the screw hole through a tension hole provided in the side wall of the frame 31, and the stay 34 is moved in the molding groove 39 by rotating the tension screw 36.
When installing the omentum yarn, firstly taking out the batten 35 from the batten groove 40, unscrewing the tensioning screw 36, enabling the brace 34 in the batten groove 39 to be close to the inner side wall of the batten groove 39 as much as possible, cutting the omentum yarn slightly larger than the outer size area of the net frame 31, spreading the omentum yarn on the net frame 31 in a non-printing surface mode (namely covering the batten groove 40 on the four-edge brace 34), afterwards, pressing the batten 35 on the four edges into the corresponding batten groove 40 in a mode perpendicular to the omentum yarn (at the moment, the edge of the omentum yarn is pressed into the batten groove 40 of the brace 34), placing the pressure head 37 on the omentum yarn, applying downward force to press the whole pressure head into the batten groove 40, and outwards rotating the wrench 38 by 90 degrees, so that the pressure head 37 rotates in the batten groove 34 and clamps the omentum yarn in the batten groove 40 on the inner sides of two clamping edges 401 of the batten groove 40 of the brace 34.
Thereafter, the tension screws 36 on the outer sides of the four sides of the screen frame 31 are tightened to move the stay 34 in the molding groove 39 in the outer side direction in the molding groove 39, thereby tightening the screen yarn on the screen frame 31, and the semi-finished product of the screen yarn and the screen frame 31 after the above operation is hereinafter referred to as a frame mask 3.
The aforementioned molding groove 39 may be provided on the bottom surface or the side surface of the side bar of the frame 31.
S3, installing the frame membrane plate 3 on a positioning bracket of the digital spraying device in a way that the printing surface of the screen gauze on the frame membrane plate is upward: unscrewing a handle for fixing on a base 2 of the device, moving the base 2 to enable the distance between the base 1 and the base 2 to be larger than that between the screen frames 31, placing the screen printing surface between the base 1 and the base 2 upwards, moving the base 2 to clamp the screen frames 31 and screwing the handle for fixing on the base 2, and fixing the frame film 3;
s4, filling the liquid material box of the digital spraying device with the first liquid material (photosensitive type) which is configured in advance, and regulating the spraying pressure on the digital spraying device to be not more than 0.3MPa and the spraying amount to be not more than 140g/m 2 Starting a digital spraying device at the moving speed of the spray head 41 of 200-500mm/min, spraying a liquid substance on a region to be sprayed through a spray nozzle of the spray head 41 above the frame membrane plate 3 according to a designed pattern to coat a cover, wherein the diameter of the spray nozzle is 0.001-0.1 mm;
s5, enabling the frame membrane plate 3 sprayed with the liquid substance to pass through a heating box at a speed of not more than 500mm/min, and arranging an ultraviolet lamp box with the internal width of 600mm and the length of 300mm above the passing position of the frame membrane plate 3, so that a membrane layer formed by the liquid substance is completely solidified, namely a solidified membrane is formed in a region where a non-printing pattern on the printing surface of the net membrane yarn is located;
s6, directly or indirectly contacting the non-printing surface (namely, the side provided with the net film 33) on the frame film plate 3 carrying the solidified film with a heating device 6 with the temperature not less than 130 ℃ arranged below the non-printing surface (indirect contact: a layer of fiber sheet can be stuck on the non-printing surface);
s7, removing the net film 33 on the non-printing surface through melting, evaporating and shrinking, and thoroughly exposing the meshes in the area to be printed with the pattern on the net film yarns;
the preferred mode adopted by the application is indirect removal: the melted web 33 is absorbed by the fibrous sheet between the heating member of the heating device 6 and the web 33, thereby producing a desired screen.
The fiber sheet has uniform thickness and no more than 0.2mm, water content no more than 9%, and tensile strength no less than 30N/25mm, and the main component of the fiber sheet can be natural fiber, artificial fiber or synthetic fiber.
Natural fiber: including plant fibers (natural cellulosic fibers), animal fibers (natural protein fibers) and mineral fibers;
artificial fiber: the natural macromolecular compound of nature, cellulose or protein is used as raw material;
synthetic fibers: organic materials are processed and refined from substances which do not contain cellulose or protein per se, such as petroleum, coal, natural gas, limestone or agricultural by-products.
2) Method II (for producing thermosensitive cured film)
S1, the content is the same as the step S1 in the method I;
s2, two plate making methods
S2.1 adopts a traditional plate making method: the same as in step S2.1 of "method one";
s2.2 the preferred layering plate making method of the application: the same as step S2.2 in "method one";
s3, the same step as the step S3 in the method I;
s4, respectively injecting the liquid resin and the liquid hardener of the second liquid substance (of the heat-sensitive type) into special boxes for containing the liquid resin and the hardener in the digital spraying device, wherein each special box is provided with a special spray head (a resin spray head for spraying the liquid resin and a hardener spray head for spraying the liquid hardener respectively) and an independent control program, and the application is preferably manufactured by the following processes:
1) The spraying pressure of the two spray heads 41 is not more than 0.2MPa, the moving speed of the spray heads 41 is 200-500mm/min, and the weight of the liquid discharged by the resin spray heads is preferably three times that of the liquid discharged by the hardening agent spray heads;
2) When spraying, the resin spray head sprays a layer of film formed by liquid resin according to a set program on the area where the non-printed pattern is located on the printing surface of the omentum gauze, then starts the hardener spray head to spray a layer of film formed by liquid hardener on the film formed by liquid resin, and sprays a plurality of periods so that the solidified film on the omentum gauze consists of a plurality of layers of liquid resin films and liquid hardener films which are alternately overlapped.
The preferred period of the present application is six.
3) The total amount of liquid resin and liquid hardener finally sprayed onto the veil is not more than 140g/m 2 ；
S5, the frame film plate 3 carrying the curing film passes through a heating box at a speed of not more than 500mm/min, the frame film plate 3 sequentially passes through the heating box at a temperature of not more than 100 ℃ and a hollow width of 600mm and a length of 300mm, and liquid substances can be heated at a high temperature (the high-temperature curing speed is faster than the normal temperature) or naturally dried at the normal temperature according to requirements, so that the curing film is formed;
s6, directly or indirectly contacting a heating device 6 with the temperature not less than 130 ℃ below the non-printing surface (namely, the side provided with the net film 33) on the frame film plate 3 carrying the solidified film (the indirect contact is that a layer of fiber sheet can be stuck on the non-printing surface);
s7, removing the net film 33 on the non-printing surface through melting, evaporating and shrinking, and thoroughly exposing the meshes in the area to be printed with the pattern on the net film yarns;
the preferred mode adopted by the application is indirect removal: that is, the melted web 33 is absorbed by the fibrous sheet between the heating member of the heating device 6 and the web 33, the fibrous sheet has a uniform thickness of not more than 0.2mm, a water content of not more than 9%, and a tensile strength of not less than 30N/25mm, and the fibrous sheet may be a natural fiber, a synthetic fiber or a synthetic fiber as a main component.
Natural fiber: including plant fibers (natural cellulosic fibers), animal fibers (natural protein fibers) and mineral fibers;
artificial fiber: the natural macromolecular compound of nature, cellulose or protein is used as raw material;
synthetic fibers: organic materials are processed and refined from substances which do not contain cellulose or protein per se, such as petroleum, coal, natural gas, limestone or agricultural by-products.
3. The application adopts the digital spraying device
As shown in fig. 1 to 7, the digital spraying device of the present application comprises a fixed base 1, a movable base 2, a frame membrane plate 3, a spray head assembly 4, a degree of freedom motion platform 5, a heating device 6 and a sliding rail 7.
As shown in fig. 1 and 2, the base 1 is fixed on the digital spraying device, the base 2 is provided with a handle for fixing, the base 2 can be moved and adjusted on the slide rail 7 towards the Y-axis direction according to the size of the screen frame 31, and the handle is locked and fixed at a proper position.
As shown in fig. 5, the frame mask 3 includes a screen 31, a gauze 32, and a screen 33.
As shown in fig. 4, the head assembly 4 includes a head 41, an X-axis rotation assembly 42, and a Y-axis rotation assembly 43.
As shown in fig. 3, the degree of freedom motion stage 5 includes a Y-axis translation assembly 51, a Z-axis translation assembly 52, and an X-axis translation assembly 53.
The spraying process is as follows:
as shown in fig. 1, 3, 4 and 5, the digital spraying device is translated along the Y axis and is lifted and reset towards the Z axis, and the spray head 41 of the spray head assembly 4 of the digital spraying device is higher than the screen frame 31 of the frame membrane plate 3, so that collision with the screen frame 31 is prevented;
and then installing the manufactured frame membrane plate 3 on a positioning bracket of the digital spraying device in a mode that the printing surface is upward, unscrewing a handle used for fixing on the base 2, moving the base 2 along the sliding rail 7 towards the Y-axis direction, enabling the distance between the base 1 and the base 2 to be larger than that between the screen frames 31, placing the printing surface of the screen frames 31 between the base 1 and the base 2, moving the base 2 to clamp the screen frames 31, and screwing the handle used for fixing on the base 2, thereby completing the fixing requirement of the frame membrane plate 3.
The digital spraying device is started, the digital spraying device moves along the X axis and the Y axis to move the spray head assembly 4 into the frame membrane plate 3, the spray head 41 of the spray head assembly 4 is placed in the net frame 31, and the Z axis translation assembly drives the digital spraying device to descend along the Z axis direction. The liquid substance is sprayed onto the printing surface of the screen 32 in the form of liquid dots, with a height between the spray head 41 and the screen of the frame plate 3 of not more than 8 mm.
The digital spraying device transversely translates and sprays, the X-axis translation component 53 drives the spray head component 4 to translate along the X-axis direction, so that the spray head 41 translates along the X-axis direction and sprays to the edge of the frame membrane plate 3, the Y-axis translation component 51 drives the spray head 41 to translate along the Y-axis direction and spray along the X-axis direction, and the spray head is sprayed back and forth.
In addition, because some of the frames 31 are higher in height and cannot be sprayed to the edges of the frames 31, the spray heads 41 can spray on the whole screen yarns in a rotary motion along with the X-axis rotary assemblies 42 and the Y-axis rotary assemblies 43 according to requirements.
As shown in fig. 2, after the liquid material is cured by illumination, high temperature or natural drying, the heating device 6 can translate along the Y-axis direction, the heating component in the heating device 6 is placed on one side of the web, the heating body in the heating component moves along the transverse direction or the longitudinal direction of the web yarn in a scanning manner, the web 33 corresponding to the area where the printed pattern is located can be heated in a selective heating manner, and then the web 33 which is shrunk and melted by heating is removed, so that plate making is completed.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.
Claims (8)
1. The screen printing plate for screen printing comprises screen gauze and a screen frame for tightening and fixing the screen gauze, and is characterized in that a layer of cured film is arranged on the screen gauze of which the area occupied by a pattern to be printed is removed on the printing surface of the screen gauze, a layer of screen film made of thermoplastic resin or waxy material is arranged on the non-printing surface of the screen gauze corresponding to the cured film, and the cured film is prepared by spraying liquid substances through a digital precise spraying device and curing through illumination, heating or natural drying modes;
the cured film is prepared by the following method:
1) Spreading and unfolding the gauze by using winding and unwinding equipment, coating an adhesive layer on the non-printing surface of the gauze, and then spraying the thermoplastic resin onto the adhesive layer by using a film spraying equipment to form a gauze consisting of the gauze and the gauze, or directly spraying a waxy material onto the non-printing surface by using the film spraying equipment to form a gauze consisting of the gauze and the gauze, wherein the non-printing surface is completely sealed by the gauze;
2) Tightening and fixing the screen gauze with the required size of the screen plate to be manufactured on a screen frame;
3) Spraying the liquid substance onto a printing surface of the omentum gauze opposite to the omentum in a liquid point mode by using a digital precise spraying device to form a dot matrix type solidified film;
4) And (3) after the solidified film is solidified by adopting an illumination, heating or natural drying device, heating the omentum corresponding to the area where the pattern is positioned in a heating mode, and removing the omentum which is heated to shrink and melt, or heating the whole omentum, and removing the omentum which is heated to shrink and melt.
2. The screen printing plate according to claim 1, wherein the frame of the screen frame is rectangular and is formed by enclosing four side strips, each side strip is provided with a brace and a batten, the top of each side strip is provided with a strip-shaped filler strip groove, each filler strip groove is internally provided with a rod-shaped brace in an adapting manner, the brace is provided with a strip-shaped batten groove, and the batten is arranged in the batten groove and tightens the screen on the screen frame.
3. Screen printing plate according to claim 2, wherein the solidified film is formed by a plurality of liquid dots connected, each liquid dot having a diameter of not more than 0.2mm, and the distance between the centers of adjacent liquid dots being not more than 0.2mm.
4. Screen printing plate according to claim 1, characterized in that the screen yarns are produced by:
1) The gauze passes through the roller in a tangential mode with the roller attached with the adhesive, and the thickness of the adhesive layer on the roller is adjusted through a gap between an adjusting scraper arranged beside the roller and the roller;
2) Heating the gauze coated with the adhesive layer by a heating device to coagulate the adhesive layer;
3) Spraying thermoplastic resin on the coagulated adhesive layer to form a layer of net film;
or alternatively, the process may be performed,
1) The gauze passes through the roller in a tangential manner to the roller;
2) And directly spraying the wax material in a molten state onto the non-printing surface to form a layer of net film.
5. Screen printing plate according to claim 4, wherein the cured film is produced by:
1) Installing the screen frame stretched with the screen gauze on a positioning bracket of the digital precise spraying device in a mode that the printing surface faces upwards;
2) Starting a digital precise spraying device to enable a spray head on the digital precise spraying device to be arranged in the screen frame;
3) The spray head moves according to a set program under the control of a main control circuit of the digital precise spraying device, the liquid substance is sprayed on the printing surface according to the residual area graph after the printing pattern is removed to form a solidified film, and the spray head can rotate and/or incline according to the received instruction;
4) And (3) placing the net film yarn sprayed with the curing film in heating equipment, illumination equipment or natural environment, and curing the curing film.
6. Screen printing plate according to claim 5, wherein the method for removing the heated, shrunk and melted screen film is as follows:
1) Placing the net film yarn after the curing of the curing film in a heating device with the temperature not less than 64 ℃;
2) And a heating component in the heating device is arranged at one side of the omentum, a heating body in the heating component moves along the transverse direction or the longitudinal direction of the omentum yarn in a scanning mode, and the heating body is directly or indirectly contacted with the omentum.
7. The screen printing plate according to claim 6, wherein the adhesive layer is made of polyurethane; the thickness of the adhesive layer is 0.002mm-0.02mm; the thickness of the net film is 0.001mm-0.01mm.
8. Screen printing plate according to claim 7, characterized in that the melted screen film is absorbed as follows:
1) The heating component consists of a heating body and a fiber sheet, one surface of the fiber sheet is contacted with the net film, the other surface of the fiber sheet is connected with the heating body, and the heating body moves transversely or longitudinally along the surface contacted with the fiber sheet;
2) After the fiber sheet is heated, heat energy is conducted to the net film, and the melted net film is absorbed by the fiber sheet;
3) The fibrous sheet has a thickness of no more than 0.2mm.
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| CN202111235673.1A CN113815298B (en) | 2021-10-22 | 2021-10-22 | Screen printing plate for screen printing |
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| CN202111235673.1A CN113815298B (en) | 2021-10-22 | 2021-10-22 | Screen printing plate for screen printing |
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| CN114474963B (en) * | 2022-04-15 | 2022-07-12 | 深圳市先地图像科技有限公司 | Multi-screen frame platemaking data processing method, system and related equipment |
| CN114940017A (en) * | 2022-06-08 | 2022-08-26 | 深圳市君派伟业有限公司 | Digital spraying machine for manufacturing screen printing plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07214746A (en) * | 1994-02-04 | 1995-08-15 | Toyoaki Nishida | Screen printing plate making apparatus and production of screen printing plate |
| CN1119426A (en) * | 1993-03-17 | 1996-03-27 | 株式会社台山 | Form plate making apparatus for screen printing |
| JP2003307833A (en) * | 2002-02-13 | 2003-10-31 | Dainippon Printing Co Ltd | Photosensitive resin composition and screen printing plate |
| JP2011194830A (en) * | 2010-03-23 | 2011-10-06 | Riso Kagaku Corp | The reinforcement method of screen printing plate, and screen printing plate |
| CN204845106U (en) * | 2015-06-18 | 2015-12-09 | 哈尔滨工程大学 | Modular from twine seal screen frame that stretches tight |
| CN208993260U (en) * | 2018-09-12 | 2019-06-18 | 湖南飞优特电子科技有限公司 | A kind of halftone reducing silk-screen material leakage |
-
2021
- 2021-10-22 CN CN202111235673.1A patent/CN113815298B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119426A (en) * | 1993-03-17 | 1996-03-27 | 株式会社台山 | Form plate making apparatus for screen printing |
| JPH07214746A (en) * | 1994-02-04 | 1995-08-15 | Toyoaki Nishida | Screen printing plate making apparatus and production of screen printing plate |
| JP2003307833A (en) * | 2002-02-13 | 2003-10-31 | Dainippon Printing Co Ltd | Photosensitive resin composition and screen printing plate |
| JP2011194830A (en) * | 2010-03-23 | 2011-10-06 | Riso Kagaku Corp | The reinforcement method of screen printing plate, and screen printing plate |
| CN204845106U (en) * | 2015-06-18 | 2015-12-09 | 哈尔滨工程大学 | Modular from twine seal screen frame that stretches tight |
| CN208993260U (en) * | 2018-09-12 | 2019-06-18 | 湖南飞优特电子科技有限公司 | A kind of halftone reducing silk-screen material leakage |
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Address after: Building 703, Building 2 # A, Chuangwei Innovation Valley, Tangtou No.1 Road, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province, 518000 Applicant after: SHENZHEN KINGPEK Co.,Ltd. Address before: 518000 SKYWORTH New Valley 5, D 602, 602 Tong Tou Road, Shiyan street, Baoan District, Shenzhen, Guangdong. Applicant before: SHENZHEN KINGPEK Co.,Ltd. |
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