CN113805440B - Printing lithographic plate making process - Google Patents
Printing lithographic plate making process Download PDFInfo
- Publication number
- CN113805440B CN113805440B CN202110888514.5A CN202110888514A CN113805440B CN 113805440 B CN113805440 B CN 113805440B CN 202110888514 A CN202110888514 A CN 202110888514A CN 113805440 B CN113805440 B CN 113805440B
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- printing plate
- roller
- developing
- printing
- belt
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 33
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000003292 glue Substances 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 238000004140 cleaning Methods 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 22
- 238000005507 spraying Methods 0.000 claims description 17
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 11
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 11
- 241001330002 Bambuseae Species 0.000 claims description 11
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 11
- 239000011425 bamboo Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 238000004513 sizing Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 20
- 239000003504 photosensitizing agent Substances 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 244000215068 Acacia senegal Species 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/3042—Imagewise removal using liquid means from printing plates transported horizontally through the processing stations
- G03F7/3057—Imagewise removal using liquid means from printing plates transported horizontally through the processing stations characterised by the processing units other than the developing unit, e.g. washing units
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/3042—Imagewise removal using liquid means from printing plates transported horizontally through the processing stations
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
The application relates to a printing lithographic plate making process, which specifically comprises the following steps of exposing, and decomposing a sensitizer in a blank part of a printing plate by using a plate copying machine; developing, using a developing device to dissolve the photosensitive agent in the blank part of the printing plate by the developing solution; coating a layer of protective glue on the surface of the printing plate uniformly, and placing the printing plate in a darkroom for natural drying; inking, if the printing plate is not used, coating a layer of ink on the surface of the image-text part of the printing plate by an ink roller inking method, and if the printing plate is immediately printed, not inking; removing dirt, namely removing dirt or unnecessary parts on the surface of the printing plate by using fountain solution; baking, namely uniformly coating a layer of baking solution on the surface of the printing plate, baking for 6 minutes at 230 ℃, so that the development efficiency is improved to a certain extent, and meanwhile, coating protective glue on the surface of the printing plate, so that the blank part of the printing plate has better hydrophilicity, the blank part of the printing plate is better moistened in the printing process, and the printed pattern is not easy to deviate.
Description
Technical Field
The present application relates to the field of platemaking, and in particular to a lithographic platemaking process.
Background
Printing modes are various, wherein lithographic printing is widely applied because of low cost and convenient plate making, and in order to perform high-quality printing, high-quality plate making is performed first to obtain a good printing plate, so that the printing quality can be improved. Among various methods of lithographic plate making, a precoated photosensitive plate making method, i.e., a PS plate making method, is gradually replacing the conventional plate-printing method due to its simple operation, good quality, and long service life. The PS plate is divided into a positive PS plate and a negative PS plate according to a use principle, and in printing, a large number of positive PS plates are used, and the positive PS plate is generally prepared by exposing a plate surface to partial light so as to decompose a sensitizer at the plate surface, then dissolving the decomposed sensitizer with a dilute alkali solution (developing solution), namely developing, so that an aluminum plate base is exposed to form a blank part of the printing plate, and a part of the surface of the aluminum plate base, which is not exposed and developed, remains with the sensitizer with good lipophilicity, namely an image-text part.
In the existing development step, an automatic developing machine is often used to improve the development efficiency, the exposed printing plate is placed in the automatic developing machine, then the printing plate moves forward and is sprayed with a developing solution, then water spraying cleaning is carried out, and the printing plate is dried and then output.
In the above-described related art, the inventors considered that the development solution was sprayed only to the surface of the printing plate, and the decomposed photosensitive layer of the blank portion of the printing plate was easily deposited on the surface of the printing plate, so that the development solution was difficult to penetrate into the photosensitive layer inside the blank portion of the printing plate, and therefore, the printing plate was required to be sprayed with the development solution for a long period of time, and the development efficiency was low.
Disclosure of Invention
In order to improve the development efficiency, the present application provides a lithographic printing process.
The printing lithographic plate making process provided by the application adopts the following technical scheme:
a lithographic printing plate making process specifically comprises the following steps.
Step 1, exposing, namely decomposing a sensitizer in a blank part of a printing plate by using a plate copying machine;
step 2, developing, namely using developing equipment to dissolve the photosensitive agent in the blank part of the printing plate by using developing solution;
step 3, sizing, uniformly coating a layer of protective glue on the surface of the printing plate, and placing the printing plate in a darkroom for natural drying;
step 4, inking, if the printing plate is not used, enabling the surface of the image-text part of the printing plate to be coated with a layer of ink by an ink roller inking method, and if printing is immediately carried out, not needing to be inked;
step 5, removing dirt, namely removing dirt or unnecessary parts on the surface of the printing plate by using fountain solution;
step 6, baking, namely uniformly coating a layer of baking solution on the surface of the printing plate, and baking for 6 minutes at 230 ℃;
the development equipment comprises a development box body for feeding and outputting printing plates, a transmission device arranged in the development box body and driving the printing plates to move forward, a spraying frame arranged in the development box body, a plurality of exhaust nozzles arranged in the spraying frame, a plurality of developing liquid spray heads which are in one-to-one correspondence with each air nozzle and spray developing liquid towards the printing plates, an air blower arranged outside the development box body and enabling the air nozzles to spray air flow towards the surfaces of the printing plates, a cleaning device arranged in the development box body and used for cleaning the printing plates, a drying device arranged in the development box body and used for drying the printing plates, and air flow directions sent by the air nozzles are perpendicular to the surfaces of the printing plates, and the air nozzles intermittently blow air towards the printing plates.
Through adopting above-mentioned technical scheme for when developer solution shower nozzle sprays the printing plate surface with developer solution, the photosensitizer that the printing plate top layer dissolved in developer solution can be blown away by air cock spun air current, make the developer solution can be faster dissolve all the photosensitizer that is exposed on the printing plate, promote development rate, also make the residue reduce on the printing plate top layer, reduce follow-up belt cleaning device and to the cleaning pressure of printing plate surface, and the air current direction forward is in the printing plate surface, make the developer solution on printing plate surface evenly spread by the air current drive, further make the developer solution distribution on printing plate surface even, can make the printing plate develop more fully.
Optionally, the transmission device comprises a row of several driving rollers which are rotationally connected inside the developing box and are attached to the upper surface of the printing plate, a conveyor belt which is arranged inside the developing box and is attached to the lower surface of the printing plate, several roller grooved wheels which are coaxially arranged at the end part of each driving roller in a one-to-one correspondence manner, a driving motor which is arranged outside the developing box, a motor grooved wheel which is coaxially arranged on the output shaft of the driving motor, and a driving belt which is in transmission connection with all the roller grooved wheels and the motor grooved wheels.
Through adopting above-mentioned technical scheme, driving roller and conveyer belt pressfitting make printing plate stable antedisplacement in the printing plate, and simultaneously driving belt can electronic complete roller sheave synchronous rotation for all driving rollers can carry out synchronous rotation.
Optionally, the conveyer belt includes two conveyer belt boards, rotate the conveyer belt roller of connecting in two conveyer belt boards, the transmission is connected in the conveyer rubber belt of all conveyer belt rollers in two conveyer belt boards, and the transmission motor is coaxial to be equipped with motor gear, and a conveyer belt roller is coaxial to be equipped with the roller gear in meshing in motor gear, and the roller gear is located between motor gear and the roller sheave.
Through adopting above-mentioned technical scheme for the transmission rubber belt can be synchronous when the conveying motor rotates and carry out the transmission, so that not only drive the printing plate forward by the driving roller, make the printing plate more stable forward.
Optionally, the inside reciprocating cylinder that drives spraying frame along conveyer belt width direction reciprocating motion that is equipped with of developing box, every exhaust nozzle evenly arranges the several along conveyer belt width direction, and the interval that the spraying frame removed is greater than the interval between two adjacent air nozzles in same row.
Through adopting above-mentioned technical scheme, reciprocating cylinder intercommunication in external power source for the spraying frame can be along with the continuous extension and the withdrawal of reciprocating cylinder's power pole and constantly remove, so that developer shower nozzle and air cock remove in step, make at the slow in-process of advancing of printing plate, the photosensitizer of printing plate blank part can be by comparatively abundant solution.
Optionally, belt cleaning device is including locating the wash rack in the developing box, locating the wash rack and can send the several water supply block of clear water towards the printing plate, rotate connect in the wash rack and the several brush roller of every water supply block of one-to-one, locate the wash rack and make every brush roller around self axis pivoted brush roller motor.
By adopting the technical scheme, the water supply block sprays water towards the printing plate and is matched with the brush roller to sufficiently clean the surface of the printing plate, so that more developing solution or dissolved photosensitive agent residue is not easy to exist on the surface of the printing plate.
Optionally, all the water supply blocks are uniformly arranged along the conveying direction of the conveying belt, each brush roller is positioned behind a corresponding water supply block according to the conveying direction of the conveying belt, and the rotating direction of the brush roller attached to one side of the surface of the printing plate is opposite to the conveying direction of the conveying belt.
By adopting the technical scheme, the residues of the developing solution and the dissolved photosensitive agent on the surface of the printing plate are further reduced, the surface of the printing plate is cleaned as much as possible, and the residues on the surface of the printing plate are not easy to flow towards the part which is cleaned by the steering of the brush roller.
Optionally, the surface of the conveying rubber belt is uniformly penetrated and provided with a plurality of rubber belt holes.
Through adopting above-mentioned technical scheme for at the printing plate convey and carry out abluent in-process at the conveying rubber belt surface, the washing water can in time follow the rubber belt hole and flow down, be difficult for piling up on the conveying belt surface, also be difficult for appearing washing water or developer along the conveying rubber belt and flow at will.
Optionally, one of the conveyor belt rollers is coaxially sleeved with a sponge cylinder, and the sponge cylinder is positioned behind the cleaning frame in compliance with the conveying direction of the conveyor belt.
Through adopting above-mentioned technical scheme for when the printing plate after the washing is accomplished when passing through the sponge section of thick bamboo, the remaining water of printing plate surface can be absorbed by the sponge section of thick bamboo, makes follow-up drying to the printing plate easier.
Optionally, the inside rotation of developing box is connected with the wringing roller that supports tightly in the sponge section of thick bamboo, and wringing roller is located between sponge section of thick bamboo and the wash rack, is equipped with the drainage sloping block under the wringing roller, and the drainage chute that supplies the inside moisture of sponge section of thick bamboo to extrude through wringing roller to fall into and discharge to the developing box outside has been seted up to drainage sloping block upper surface.
Through adopting above-mentioned technical scheme for the wringing roller can in time discharge and drip the interior outflow of drainage chute to the developing box outside with the interior absorptive water of sponge section of thick bamboo, makes the sponge section of thick bamboo keep better hydroscopicity all the time, makes the water of printing plate surface most all can be absorbed by the sponge section of thick bamboo.
Optionally, drying device is including locating the stoving stock in the developing box, communicate in the stoving stock and make the stoving stock blow out the electric fan heater of hot air flow in the printing plate, communicate in the filter box of stoving stock and air heater, locate inside the filter box and can carry out filterable coarse filtration stratum reticulare and the fine filtration stratum reticulare to the particulate matter in the air.
Through adopting above-mentioned technical scheme for when the stoving stock blows off hot air towards the printing plate in order to dry the printing plate, coarse filter screen layer and thin filter screen layer can filter impurity in the hot air, make the printing plate surface be difficult for adhering to some other debris, make the printing plate can keep a comparatively clean state when exporting.
In summary, the present application includes at least one of the following beneficial effects:
1. the development rate is improved, residues on the surface layer of the printing plate are reduced, the cleaning pressure of a subsequent cleaning device on the surface of the printing plate is reduced, and the airflow direction is forward to the surface of the printing plate, so that the development liquid on the surface of the printing plate is uniformly diffused by the airflow, the development liquid on the surface of the printing plate is uniformly distributed, and the printing plate can be developed more fully;
2. further reducing the residue of the developing solution and the dissolved photosensitive agent on the surface of the printing plate, so that the surface of the printing plate is cleaned as much as possible.
Drawings
Fig. 1 is a cross-sectional view of one side of a developing casing of the developing apparatus of the present application in a longitudinal direction to show a schematic view of the inside of the developing casing;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a bottom view of the interior of the developer housing with the cartridge in cross-section;
FIG. 4 is an enlarged view at B in FIG. 3;
FIG. 5 is an enlarged view of FIG. 3 at C;
fig. 6 is an enlarged view of fig. 3 at D.
Reference numerals illustrate: 1. a developing box; 11. a plate inlet; 12. a plate outlet; 13. a connecting plate; 14. a roller plate; 15. a guide rod; 16. a guide cylinder; 17. a water supply long groove; 18. brushing a roller block; 19. drying the long groove; 2. a spraying frame; 21. a wringing roller; 22. a drain inclined block; 23. a drainage chute; 24. drying the long rod; 26. a warm-air drier; 27. a filter box; 28. a coarse filter screen layer; 29. a fine filter screen layer; 3. an air tap; 31. a motor gear; 32. a roller gear; 33. a developer nozzle; 34. a reciprocating cylinder; 35. a cleaning frame; 36. a water supply block; 37. a brush roller; 38. a rubber belt hole; 39. a sponge cylinder; 4. a blower; 41. a driving roller; 42. a brush roller motor; 43. a roller sheave; 44. a drive motor; 45. a motor sheave; 46. a drive belt; 47. a conveyor belt plate; 48. a conveyor belt roller; 49. and conveying the rubber belt.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses a printing lithographic plate making process, which specifically comprises the following steps:
step 1, exposing, namely decomposing a sensitizer in a blank part of a printing plate by using a plate copying machine;
step 2, developing, namely using developing equipment to dissolve the photosensitive agent in the blank part of the printing plate by using developing solution;
step 3, sizing, namely uniformly coating a layer of protective glue on the surface of the printing plate, wherein the protective glue can be selected from gum arabic, and naturally drying the printing plate in a darkroom;
step 4, inking, if the printing plate is not used, enabling the surface of the image-text part of the printing plate to be coated with a layer of ink by an ink roller inking method, and if printing is immediately carried out, not needing to be inked;
step 5, removing dirt, namely removing dirt or unnecessary parts on the surface of the printing plate by using fountain solution;
and 6, baking, namely uniformly coating a layer of baking solution on the surface of the printing plate, and baking for 6 minutes at 230 ℃.
Referring to fig. 1, the developing apparatus in step 2 includes a developing box 1 placed on the ground, a printing plate inlet 11 and a printing plate outlet 12 are respectively provided on both sides of the developing box 1 in the length direction, two horizontal connection plates 13 are fixedly connected to both sides of the developing box 1 in the length direction, and upper surfaces of the two connection plates 13 are flush with inner horizontal lower surfaces of the printing plate inlet 11 and the printing plate outlet 12, respectively. The horizontal printing plate enters from the printing plate inlet 11 and finally is output from the printing plate outlet 12. The developing casing 1 is provided with an observation window capable of observing the transfer of the printing plate inside the developing casing 1.
Referring to fig. 1 and 2, a transfer device for driving a printing plate to move forward is mounted in the developing box 1, the transfer device comprises a conveyor belt mounted on the inner lower surface of the developing box 1, the conveyor belt comprises two conveyor belt plates 47 fixedly connected to the inner lower surface of the developing box 1 and being vertical, the length direction of the conveyor belt plates 47 is parallel to the length direction of the developing box 1, four conveyor belt rollers 48 are rotatably connected between the two conveyor belt plates 47, the axis direction of each conveyor belt roller 48 is perpendicular to the vertical side surface where the length direction of the corresponding conveyor belt plate 47 is located, the four conveyor belt rollers 48 are in transmission connection with the same conveyor rubber belt 49, and a plurality of rubber belt holes 38 are evenly formed in the surface of the conveyor rubber belt 49 in a penetrating mode. The upper surface of the inside of the developing box body 1 is integrally formed with four groups of two roller plates 14, each group of two roller plates 14 are rotatably connected with a driving roller 41, the axial direction of the driving roller 41 is parallel to the axial direction of the conveyor belt roller 48, and the four driving rollers 41 are respectively positioned right above the four conveyor belt rollers 48 in a one-to-one correspondence. The printing plate is attached to the upper surface of the conveying rubber belt 49 and the lower surface of the circumferential outer wall of the driving roller 41 for slow transmission, and the distance between the two similar driving rollers 41 is smaller than the length of the side edge of the printing plate parallel to the length direction of the conveying rubber belt 49, so that one driving roller 41 is always abutted against the upper surface of the printing plate in the process that the printing plate moves along the length direction of the conveying rubber belt 49.
Referring to fig. 1 and 2, the end of each driving roller 41 is coaxially and fixedly connected with a roller sheave 43, the roller sheaves 43 are rotatably connected to the roller plate 14, the vertical outer wall of the developing box 1 in the length direction is fixedly connected with a driving motor 44, the output shaft of the driving motor 44 penetrates through and is rotatably connected to the vertical outer wall of the developing box 1 in the length direction, the output shaft of the driving motor 44 is coaxially and fixedly connected with a motor sheave 45, and the same driving belt 46 is in driving connection between the motor sheave 45 and all the roller sheaves 43. The end of the output shaft of the transmission motor 44 is coaxially and fixedly connected with a motor gear 31, a roller gear 32 is meshed right above the motor gear 31, and the roller gear 32 is coaxially and fixedly connected with a conveyor belt roller 48. When the transmission motor 44 is connected to an external power source, the motor sheave 45 rotates to drive the transmission belt 46, then all the roller sheaves 43 drive, so that the four transmission rollers 41 rotate synchronously, and the transmission motor 44 drives the motor gear 31 to rotate simultaneously, so that the roller gear 32 rotates synchronously, so that the conveyor belt roller 48 rotates to drive the conveyor belt 49, so that the transmission rollers 41 and 48 rotate in opposite directions, the conveyor belt 49 and the transmission rollers 41 can move forward with the belt printing plates in cooperation, and the linear speed of the transmission rollers 41 is the same as the transmission speed of the conveyor belt 49. The surface of the plate that needs to be developed is the upper surface.
Referring to fig. 3 and 4, a horizontal spray frame 2 is installed between two driving rollers 41 closest to the printing plate inlet 11, a plurality of rows of developing solution spray heads 33 are uniformly and fixedly connected to the lower surface of the spray frame 2, all rows of developing solution spray heads 33 are uniformly arranged along the length direction of the conveying rubber belt 49, each row of developing solution spray heads 33 is uniformly provided with a plurality of developing solution spray heads 33 along the width direction of the conveying rubber belt 49, the developing solution spray heads 33 are communicated with a water pump positioned outside the developing box body 1, and the water pump pumps the developing solution into the developing solution spray heads 33, so that the developing solution spray heads 33 can spray developing solution towards the printing plate. The spraying frame 2 lower surface fixedly connected with a plurality of air cock 3 of every developer shower nozzle 33 of one-to-one, all air cock 3 intercommunication have be located the air-blower 4 of the outside upper surface of developing box 1, and air-blower 4 makes air cock 3 can be towards printing plate upper surface blowout air current, and air cock 3 spun air current direction perpendicular to printing plate upper surface, and air cock 3 blowout air current is in order to blow away the photosensitizer that the printing plate blank part surface was dissolved for the developer can better contact in printing plate blank part undissolved photosensitizer, makes the printing plate develop fully. The lower surface inside the developing box body 1 is fully and fixedly connected with a box capable of receiving developing solution, so that the developing solution is recovered, filtered and reused. In other embodiments, the blower 4 may be turned off or on by manual control by an operator, so that the blower 4 intermittently operates to intermittently blow the air tap 3 toward the printing plate, so that the developing solution can be fully applied to the whole printing plate.
Referring to fig. 3 and 4, a reciprocating cylinder 34 is fixedly connected to the inner vertical side surface of the developing box 1 in the length direction, the reciprocating cylinder 34 may be a double-acting cylinder, the length direction of a power rod of the reciprocating cylinder 34 is perpendicular to the vertical side surface of the conveying belt plate 47 in the length direction, and the power rod of the reciprocating cylinder 34 is fixedly connected to the spraying frame 2, so that the spraying frame 2 can reciprocate along the width direction of the conveying rubber belt 49. The developing box body 1 is provided with a guide rod 15 fixedly connected with the vertical side surface of the reciprocating cylinder 34, the length direction of the guide rod 15 is parallel to the length direction of the power rod of the reciprocating cylinder 34, the guide rod 15 is coaxially and tightly inserted with a guide cylinder 16, and the circumferential outer wall of the guide cylinder 16 is fixedly connected with the upper surface of the spraying frame 2. The stroke of the reciprocating cylinder 34, that is, the length of the reciprocating movement of the spray frame 2 is equal to the interval between two adjacent developing solution spray heads 33 in the same row, so that the surface of the printing plate can be fully sprayed with the developing solution by the developing solution spray heads 33 in the process of the reciprocating movement of the spray frame 2.
Referring to fig. 3 and 5, a cleaning device for cleaning a printing plate is installed in the developing box 1, the cleaning device comprises a cleaning frame 35 installed between two adjacent driving rollers 41, two driving rollers 41 which are close to the cleaning frame 35 are two driving rollers 41 which are positioned in the middle position in four driving rollers 41, the cleaning frame 35 is fixedly connected to the upper surface inside the developing box 1, a plurality of horizontal water supply blocks 36 are fixedly connected to the lower surface of the cleaning frame 35, the length direction of each water supply block 36 is parallel to the axis direction of the driving roller 41, a water supply long groove 17 is formed in the lower surface of each water supply block 36, the length direction of each water supply long groove 17 is parallel to the length direction of each water supply block 36, and the water supply blocks 36 are communicated with corresponding water pumps, so that the water supply long grooves 17 are used for supplying clean water to the printing plate for cleaning.
Referring to fig. 3 and 5, a group of brush roller blocks 18 are uniformly formed on the lower surface of the cleaning frame 35 corresponding to each water supply block 36, each group of brush roller blocks 18 is positioned behind the corresponding water supply block 36 according to the printing plate conveying direction, a brush roller 37 is rotatably connected between each group of two brush roller blocks 18, a plurality of groups of thin and short bristles are uniformly and fixedly connected to the peripheral outer wall of the brush roller 37, the bristles of the brush roller 37 are contacted with the surface of the printing plate, a brush roller motor 42 is fixedly connected to each group of brush roller blocks 18, and the output shaft of each brush roller motor 42 is coaxially and fixedly connected to a similar brush roller 37. The rotation direction of the brush roller 37 on the side contacting the printing plate is deviated from the printing plate conveying direction. The bottom surface of the developing box 1 is provided with a corresponding box body for receiving the cleaning water and can be pumped out of the developing box 1 by a water pump.
Referring to fig. 3 and 6, a sponge cylinder 39 is coaxially stuck on the outer wall of the circumference of a driving roller 41, which is close to the printing plate outlet 12, of the four driving rollers 41, the sponge cylinder 39 is tightly attached to the upper surface of the printing plate, a wringing roller 21 is rotatably connected between two roller plates 14 of the same group, which are close to the sponge cylinder 39, the wringing roller 21 is tightly pressed on the sponge cylinder 39, and the wringing roller 21 is positioned on one side, which faces the cleaning frame 35, of the similar driving roller 41. The vertical inner wall of the length direction of the developing box body 1 is fixedly connected with a inclined drain inclined block 22, one end of the drain inclined block 22 connected with the developing box body 1 is a high-point end, a drain chute 23 is formed in the upper surface of the drain inclined block 22, the drain chute 23 is located right below the wringing roller 21 and right above the conveying rubber belt 49, the drain chute 23 penetrates through the end face of one end of the low point of the drain inclined block 22, and cleaning water extruded by the sponge cylinder 39 flows into the box body located right below the cleaning frame 35 after entering the drain chute 23.
Referring to fig. 1 and 3, a drying device for drying a printing plate is installed in a developing box 1, the drying device comprises two drying long rods 24 fixedly connected to the vertical inner wall where the length direction of the developing box 1 is located, the two drying long rods 24 are located between two driving rollers 41 close to a printing plate outlet 12, a conveying rubber belt 49 is located between the two drying long rods 24, the drying long rods 24 with low positions penetrate through a conveying belt plate 47, a row of drying long grooves 19 are formed in the surfaces, facing the conveying rubber belt 49, of the two drying long rods 24, the length direction of the drying long grooves 19 is parallel to the axis direction of the driving rollers 41, the length of the drying long grooves 19 is greater than the length of a side edge, parallel to the axis direction of the driving rollers 41, of the printing plate, and a plurality of drying long grooves 19 are uniformly arranged along the length direction of the conveying rubber belt 49. The two drying long rods 24 are communicated with the same fan heater 26 positioned outside the developing box body 1, and the fan heater 26 enables the two drying long grooves 19 to blow hot air towards the printing plate and the conveying rubber belt 49.
Referring to fig. 1 and 3, a filter box 27 is connected and communicated between a fan heater 26 and a drying long rod 24 in a flange manner, a coarse filter screen layer 28 and a fine filter screen layer 29 are fixedly connected inside the filter box 27, a medium-efficiency filter screen is selected for the coarse filter screen layer 28, a HEPA efficient filter screen is selected for the fine filter screen layer 29, and hot air sent into the filter box 27 by the fan heater 26 passes through the coarse filter screen layer 28 and then passes through the fine filter screen layer 29.
The implementation principle of the printing lithographic plate making process of the embodiment of the application is as follows: the printing plate is driven to advance from the printing plate inlet 11 to the position between the driving roller 41 and the conveying rubber belt 49, and sequentially passes through the position right below the spraying frame 2, the position right below the cleaning frame 35, the sponge cylinder 39 and the drying long rod 24, so that the printing plate is sequentially developed, cleaned, absorbed in water and dried, and finally is sent out from the printing plate outlet 12.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. A lithographic printing process characterized by: the method specifically comprises the following steps:
step 1, exposing, namely decomposing a sensitizer in a blank part of a printing plate by using a plate copying machine;
step 2, developing, namely using developing equipment to dissolve the photosensitive agent in the blank part of the printing plate by using developing solution;
step 3, sizing, uniformly coating a layer of protective glue on the surface of the printing plate, and placing the printing plate in a darkroom for natural drying;
step 4, inking, if the printing plate is not used, enabling the surface of the image-text part of the printing plate to be coated with a layer of ink by an ink roller inking method, and if printing is immediately carried out, not needing to be inked;
step 5, removing dirt, namely removing dirt or unnecessary parts on the surface of the printing plate by using fountain solution;
step 6, baking, namely uniformly coating a layer of baking solution on the surface of the printing plate, and baking for 6 minutes at 230 ℃;
the development equipment comprises a development box body (1) for feeding printing plates and outputting, a transmission device arranged in the development box body (1) and driving the printing plates to move forward, a spraying frame (2) arranged in the development box body (1), a plurality of exhaust nozzles (3) arranged in the spraying frame (2), a plurality of development liquid spray heads (33) which are in one-to-one correspondence with each air nozzle (3) and are arranged in the spraying frame (2) and spray development liquid towards the printing plates, an air blower (4) arranged outside the development box body (1) and used for enabling the air nozzles (3) to spray air flow towards the surfaces of the printing plates, a cleaning device arranged in the development box body (1) and used for cleaning the printing plates, and a drying device arranged in the development box body (1) and used for drying the printing plates, wherein the air flow direction sent out by the air nozzles (3) is perpendicular to the surfaces of the printing plates, and the air nozzles (3) are used for intermittently blowing air towards the printing plates.
2. A lithographic printing process according to claim 1, wherein: the transmission device comprises a row of transmission rollers (41) which are rotationally connected inside a developing box body (1) and are attached to the upper surface of a printing plate, a conveyor belt which is arranged inside the developing box body (1) and attached to the lower surface of the printing plate, a plurality of roller grooved wheels (43) which are coaxially arranged at the end parts of each transmission roller (41) in a one-to-one correspondence manner, a transmission motor (44) which is arranged outside the developing box body (1), a motor grooved wheel (45) which is coaxially arranged on the output shaft of the transmission motor (44), and a transmission belt (46) which is connected with all the roller grooved wheels (43) and the motor grooved wheels (45) in a transmission manner.
3. A lithographic printing process according to claim 2, wherein: the conveyer belt is including locating two conveyer belt boards (47) in developing box (1), rotate several conveyer belt roller (48) of connecting in two conveyer belt boards (47), transmission is connected in conveyer rubber belt (49) of whole conveyer belt roller (48), and driving motor (44) coaxial be equipped with motor gear (31), and a conveyer belt roller (48) coaxial be equipped with mesh in roller gear (32) of motor gear (31), roller gear (32) are located between motor gear (31) and roller sheave (43).
4. A lithographic printing process according to claim 1, wherein: the development box (1) is internally provided with a reciprocating cylinder (34) for driving the spraying frame (2) to reciprocate along the width direction of the conveyor belt, a plurality of exhaust nozzles (3) are uniformly arranged along the width direction of the conveyor belt, and the moving interval of the spraying frame (2) is larger than the interval between two adjacent air nozzles (3) in the same row.
5. A lithographic printing process according to claim 3, characterized in that: the cleaning device comprises a cleaning frame (35) arranged in the developing box body (1), a plurality of water supply blocks (36) which are arranged on the cleaning frame (35) and can supply clear water towards the printing plate, a plurality of brush rollers (37) which are rotatably connected to the cleaning frame (35) and correspond to each water supply block (36) one by one, and a brush roller motor (42) which is arranged on the cleaning frame (35) and enables each brush roller (37) to rotate around the axis of the brush roller motor.
6. A lithographic printing process according to claim 5, wherein: all the water supply blocks (36) are uniformly arranged along the conveying direction of the conveying belt, each brush roller (37) is positioned behind one corresponding water supply block (36) according to the conveying direction of the conveying belt, and the rotating direction of the brush roller (37) attached to one side of the surface of the printing plate is opposite to the conveying direction of the conveying belt.
7. A lithographic printing process according to claim 5, wherein: the surface of the conveying rubber belt (49) is uniformly provided with a plurality of rubber belt holes (38) in a penetrating mode.
8. A lithographic printing process according to claim 5, wherein: a sponge cylinder (39) is coaxially sleeved on one conveyor belt roller (48), and the sponge cylinder (39) is positioned behind the cleaning frame (35) according to the conveying direction of the conveyor belt.
9. A lithographic printing process according to claim 8, wherein: the inside rotation of developing box (1) is connected with wringing roller (21) that supports tightly in sponge section of thick bamboo (39), and wringing roller (21) are located between sponge section of thick bamboo (39) and wash rack (35), are equipped with drainage sloping block (22) under wringing roller (21), and drainage chute (23) that supply sponge section of thick bamboo (39) inside moisture falls into and discharge outside developing box (1) are offered to drainage sloping block (22) upper surface through wringing roller (21) extrusion.
10. A lithographic printing process according to claim 1, wherein: the drying device comprises a drying long rod (24) arranged in a developing box body (1), a warm air blower (26) which is communicated with the drying long rod (24) and enables the drying long rod (24) to blow hot air towards a printing plate, a filter box (27) which is communicated with the drying long rod (24) and the warm air blower (26), a rough filter screen layer (28) and a fine filter screen layer (29) which are arranged in the filter box (27) and can filter particles in air.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110888514.5A CN113805440B (en) | 2021-08-04 | 2021-08-04 | Printing lithographic plate making process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110888514.5A CN113805440B (en) | 2021-08-04 | 2021-08-04 | Printing lithographic plate making process |
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| CN113805440A CN113805440A (en) | 2021-12-17 |
| CN113805440B true CN113805440B (en) | 2024-04-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189411A (en) * | 1997-01-31 | 1998-08-05 | 印刷技术合作协会 | Device for removing ink applied to non-printing parts on waterless planographic printing plate and planographic printing machine and method using the same |
| JP2006276290A (en) * | 2005-03-28 | 2006-10-12 | Fuji Photo Film Co Ltd | Developing device for printing plate |
| CN109109482A (en) * | 2017-06-26 | 2019-01-01 | 广州市佳盛印刷有限公司 | A kind of method of cold wave printing |
| CN212749523U (en) * | 2020-09-19 | 2021-03-19 | 南京迅驰彩色印刷有限公司 | Developing device of plate-making machine |
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2021
- 2021-08-04 CN CN202110888514.5A patent/CN113805440B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189411A (en) * | 1997-01-31 | 1998-08-05 | 印刷技术合作协会 | Device for removing ink applied to non-printing parts on waterless planographic printing plate and planographic printing machine and method using the same |
| JP2006276290A (en) * | 2005-03-28 | 2006-10-12 | Fuji Photo Film Co Ltd | Developing device for printing plate |
| CN109109482A (en) * | 2017-06-26 | 2019-01-01 | 广州市佳盛印刷有限公司 | A kind of method of cold wave printing |
| CN212749523U (en) * | 2020-09-19 | 2021-03-19 | 南京迅驰彩色印刷有限公司 | Developing device of plate-making machine |
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| 紫激光CTP版材印刷上脏原因分析;郭伟锋;刘晓蕾;;广东印刷;20131020(第05期);全文 * |
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| CN113805440A (en) | 2021-12-17 |
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