CN210501922U

CN210501922U - Digital printing system for plates

Info

Publication number: CN210501922U
Application number: CN201920460811.8U
Authority: CN
Inventors: 胡御霜
Original assignee: Shanghai Teckwin Technology Development Co ltd
Current assignee: Shanghai Teckwin Technology Development Co ltd
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-05-12
Anticipated expiration: 2029-04-08

Abstract

The utility model relates to a digital printing system of panel, which is characterized in that the system comprises a scanning type flat printer controlled by a control unit and a duct type high-speed printing production line, wherein the duct type high-speed printing production line comprises a printing module, a guide belt transports the panel to be printed at a feed port to a discharge port through the printing module, and the printing module prints patterns on the panel; the feeding hole is provided with a plate printing centering material blocking and clamping device, the printing module is provided with a device for cleaning the printing nozzle, and the discharging hole is provided with an automatic gluing and cleaning device. The utility model discloses combine the equipment characteristics of scanning formula and duct formula, make a large-scale printing manufacture factory can be in high yield, guarantee the flexibility of production.

Description

Digital printing system for plates

Technical Field

The utility model relates to a system for carry out digital printing at panel is applied to panel industry digital printing field.

Background

In the field of plate industrial digital printing, the digital printing technology is used for decorating the surfaces of calcium silicate plates, cement pressure plates and the like (hereinafter collectively referred to as plates) to form vivid and rich patterns. The existing few production lines mainly have two types of equipment, namely scanning type equipment and duct type equipment, and the scanning type equipment has the advantages that: the cost is relatively low, the production flexibility is high, but the defect is that the production efficiency is low. The ducted equipment has the advantages that: high production efficiency and relatively fixed patterns, but has the defect of large investment.

Meanwhile, no matter scanning equipment or duct equipment is adopted, corresponding patterns can be printed on the plates according to patterns and figures of different raw material plates in order to achieve the best product effect. Different patterns are printed on different decorative patterns and figures, so that the printed patterns not only have vivid visual effects, but also have vivid tactile effects. Therefore, before the printing is carried out on the plate, the patterns of the plate and the plane figures on the plate need to be determined, and then the corresponding patterns are selected in a computer. In the current production, the work is manually completed, for example, the material to be printed is manually determined to be A, then the corresponding pattern PICA is selected in a computer, and then the pattern PICA is printed on the material A for printing batch production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the advantages of the scanning type equipment and the ducted type equipment are combined, and meanwhile, the automatic identification of the patterns and the graphs of the plate is achieved.

In order to achieve the above object, the present invention provides a digital printing system for plates, which is characterized in that the digital printing system comprises a scanning flatbed printer controlled by a control unit and a ducted high-speed printing production line, wherein the ducted high-speed printing production line comprises a printing module, a plate to be printed at a feeding port is transported to a discharging port by a guide belt through the printing module, and a pattern is printed on the plate by the printing module; the printing module is provided with a device for cleaning a printing nozzle, and the discharge port is provided with an automatic gluing and cleaning device;

the plate printing centering material blocking and clamping device comprises side plates positioned on the left side and the right side, and a rotating shaft, a shaft and a guide rail which are sequentially arranged from front to back are arranged between the side plates on the two sides;

the scraper component is arranged on the rotating shaft along the axial direction, the left end and the right end of the rotating shaft are respectively provided with a driving component, the driving components on the two sides are respectively fixed on the side plates on the two sides, and the driving components drive the rotating shaft to rotate around the central axis thereof;

n sun wheels capable of freely rolling are arranged on the shaft in a penetrating manner; adjusting nuts capable of being adjusted up and down are respectively arranged on the side plates on the left side and the right side, the bottoms of the adjusting nuts on the left side and the right side are respectively connected with the left end and the right end of the shaft, the shaft is fixed between the side plates on the two sides by the adjusting nuts, and the shaft is driven to move up and down when the adjusting nuts are adjusted up and down;

the middle part of the guide rail is provided with a clamping cylinder assembly with a left output shaft and a right output shaft, the left side and the right side of the clamping cylinder assembly are respectively provided with a clamping wheel assembly penetrating through the guide rail, and the two clamping wheel assemblies are respectively fixedly connected with the two output shafts of the clamping cylinder assembly;

the device of shower nozzle is printed in washing is including the motor that has the speed reducer, the motor passes through speed reducer drive transmission shaft and rotates, the speed reducer is located the middle part of transmission shaft, the left side of transmission shaft, the right side both ends are equipped with a synchronizing wheel respectively, be equipped with two interval certain distances in the below of each side synchronizing wheel from the driving wheel, a hold-in range is around the synchronizing wheel of homonymy and from the driving wheel, make the synchronizing wheel of homonymy and drive the hold-in range rotation of homonymy from the driving wheel, be equipped with an at least set of belt cleaning device between the hold-in range of the left and right sides, every cleaning equipment:

each group of cleaning equipment comprises an air suction box positioned below the spray head, the air suction box is communicated with the negative pressure generating equipment, the left end and the right end of the air suction box are fixedly connected with the synchronous belt at the same side, the top surface of the air suction box is provided with a hole and a suction nozzle, the negative pressure generating equipment generates suction air through the suction nozzle, and the edge of the top surface of the air suction box is provided with a scraping blade;

printing conduction band automatic gluing belt cleaning device is including arranging rubberizing device and the frictioning device in the conduction band end that curls, and rubberizing device is located the top of conduction band, and the frictioning device is located the below of conduction band, and rubberizing device and frictioning device all cross whole conduction band on width direction, wherein:

the gluing device comprises a supporting pipe fixed above the guide belts, the supporting pipe transversely spans the whole guide belts in the width direction, a rack and a guide rail are arranged on the supporting pipe, a sliding block capable of moving along the guide rail is arranged on the guide rail, a servo motor and a glue spraying barrel are fixed on the sliding block, a gear is arranged on an output shaft of the servo motor, and the gear is meshed with the rack;

the frictioning device is including the funnel that is located the conduction band below, and the whole conduction band is gone up to cross by the funnel in width direction, and the funnel top is equipped with washing water pipe and doctor-bar angle adjusting part, and it has the pore to open on the washing water pipe, and the washing water pipe links to each other with outside washing liquid feeding device, and the washing liquid that washing liquid feeding device supplied with sprays on the surface of conduction band through the pore of washing water pipe, hangs down to the funnel in with the glue on conduction band surface by doctor-bar angle adjusting part.

Preferably, the driving assembly comprises a material blocking cylinder arranged on the side plate, an output arm of the material blocking cylinder is hinged to one end of a connecting piece, and the other end of the connecting piece is sleeved on the left end portion or the right end portion of the rotating shaft.

Preferably, the side plate is provided with a scale, the adjusting nut is provided with an indicating plate which moves up and down along with the adjusting nut, and the indicating plate is matched with the scale.

Preferably, the doctor-bar angle adjusting assembly comprises adjusting nuts located on the left side and the right side, each adjusting nut penetrates through one threaded block, the adjusting nuts are in threaded fit with the threaded blocks, the front end of each adjusting nut is hinged to one end of one connecting piece, the other ends of the two connecting pieces on the left side and the right side are fixed to the left side and the right side of the doctor-bar fixing frame respectively, and the doctor-bars are arranged on the doctor-bar fixing frame.

Preferably, the left side and the right side of the funnel and the scraping blade angle adjusting assembly are respectively provided with a side plate, each side plate is provided with a conduction band pinch roller capable of freely rolling, and the conduction band pinch rollers are tightly attached to the conduction bands.

The utility model has the advantages of as follows:

(1) the utility model discloses combine the equipment characteristics of scanning formula and duct formula, make a large-scale printing manufacture factory can be in high yield, guarantee the flexibility of production.

(2) The utility model provides a multi-disc board needs to get into simultaneously and prints the region, and the material successively reachs when printing the entrance again, can fix a position fast accurately to through one set of simple "sun gear pinch roller" subassembly, guarantee that multi-disc panel does not arch up.

(3) The device that the shower nozzle was printed in washing will induced draft and the doctor-bar combines together, has not only increased the coverage area, can hang the printing ink that can't be blown off on the shower nozzle through the doctor-bar in addition and fall, has increased the cleaning performance, can realize printing the comprehensive, thoroughly washing of the nozzle of shower nozzle, ensures to print the effect, is showing the life-span that improves the printer.

(4) Can paint the washing according to the maintenance time of setting for to the conduction band is automatic to the UV of solidifying is glued and is scraped off on the conduction band automatically, when improving the cleaning efficiency, has ensured the cleaning performance.

Drawings

Fig. 1 is a schematic diagram of the general structure of the printing system of the present invention;

FIG. 2 is an assembly view of the plate printing centering material blocking and clamping device;

FIG. 3 is an exploded view of a plate printing centering material blocking and clamping device;

FIG. 4 is a schematic view of an application of the apparatus for cleaning the print head;

FIG. 5 is an exploded view of an apparatus for cleaning a print head;

FIG. 6 is a schematic view of the overall structure of the automatic sizing and cleaning device for the printing tape guide;

FIG. 7 is a side view of the printing tape guide automatic size cleaning apparatus;

FIG. 8 is a schematic view of the structure of the glue applicator;

fig. 9 is a schematic structural view of the glue scraping device.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the utility model provides a digital printing system of panel includes the high-speed printing production line of scanning formula flatbed printer and duct formula of being controlled by a control unit PC. Scanning flatbed printers and ducted high-speed printing production lines use the same ink, nozzles and color management software.

The control unit PC controls the scanning flat-panel printer to print the pattern recognized by the intelligent plate multi-pattern change printing recognition system on the plate to be printed to form a printed plate sample, the printed plate sample is compared with the printed plate with the expected design, the color difference and the equipment data parameters causing the color difference are judged, and the equipment data parameters are completely copied to the ducted high-speed printing production line by the control unit. The ducted high-speed printing production line prints patterns identified by the intelligent identification system for multi-pattern change printing of the plates in batches on the plates to be printed according to the equipment parameters confirmed by the scanning flat-panel printer.

The scanning flatbed printer comprises a printing platform 4 and a printing trolley 3, and the arrow 1 and the arrow 2 respectively indicate the printing direction and the stepping direction.

The high-speed printing production line of duct formula includes print module 7, and guide band 8 will be located the panel of waiting to print of feed inlet 5 and transport to discharge gate 6 via print module 7, is printed the pattern on panel by print module 7. The direction of feed is indicated by arrow 45. The feeding hole 5 is provided with a plate printing centering material blocking and clamping device, the printing module 7 is provided with a device for cleaning the printing nozzle, and the discharging hole 6 is provided with an automatic gluing and cleaning device.

Referring to fig. 2 and 3, the plate printing centering material blocking and clamping device includes side plates 10 located on the left and right sides, and a rotating shaft 21, a shaft 22, a section 26 and a guide rail 23 are arranged between the side plates 10 on the two sides in sequence from front to back.

The scraper component 9 is arranged on the rotating shaft 21 along the axial direction. The left and right ends of the rotating shaft 21 are respectively sleeved with a connecting piece 24. The connecting piece 24 on each side is hinged with the output arm of one material blocking cylinder 14. The material blocking cylinder 14 is fixed on the side plate 10 on the same side, and the rotating shaft 21 is driven by the material blocking cylinder 14 to rotate around the central axis of the rotating shaft.

N sun gears 17 capable of freely rolling are arranged on the shaft 22 in a penetrating mode, the sun gears 17 are installed on deep groove ball bearings 16, and the deep groove ball bearings 16 are fixed on the shaft 22 through locking blocks 15.

The utility model discloses in, sun gear 17's position is adjustable from top to bottom, and concrete implementation is:

a screw block 25 is fixed on each side plate 10, an adjusting nut 11 is arranged in each screw block 25 in a penetrating way, and the adjusting nut 11 is in threaded fit with the screw block 25, so that the adjusting nut 11 can be adjusted up and down. The bottoms of the adjusting nuts 11 on the left side and the right side are respectively connected with the left end and the right end of the shaft 22, the shaft 22 is fixed between the side plates 10 on the two sides by the adjusting nuts 11, and the shaft 22 is driven to move up and down when the adjusting nuts 11 are adjusted up and down. In order to accurately observe the up-and-down adjustment range of the position of the sun gear 17, a scale 12 is arranged on the side plate 10, an indicating plate 13 which moves up and down along with the adjusting nut 11 is arranged on the adjusting nut 11, and the indicating plate 13 is matched with the scale 12, so that the up-and-down movement distance of the nut 11 can be confirmed according to the position of the indicating plate 13 on the scale 12.

A feed eye assembly 18 is provided on profile 26.

The guide rail 23 comprises two cylindrical guide rails arranged in front and back, and a clamping cylinder assembly 19 with a left output shaft and a right output shaft is arranged in the middle of the guide rail 23. The two output shafts of the clamping cylinder assembly 19 are located between the two cylindrical guide rails, respectively. Two clamping wheel assemblies 20 are arranged on the guide rail 23 in a penetrating mode, the two clamping wheel assemblies 20 are located on the left side and the right side of the clamping cylinder assembly 19, and the two clamping wheel assemblies 20 are fixedly connected with two output shafts of the clamping cylinder assembly 19 respectively.

The working process of the plate printing centering material blocking and clamping device is as follows: when the printing medium enters the lower part of the feeding optical eye assembly 18, the feeding optical eye assembly 18 receives the signal, the signal is accurately calculated through time delay, the signal is sent to the control component, the control component controls the retraction of the material blocking cylinder 14, the scraper blade assembly 9 is rotated, the scraper blade rotates downwards, and the printing medium is blocked. The adjusting nut 11 is adjusted according to the thickness of the printing medium, and the sun wheel 17 is adjusted to a proper height according to the reading of the indicating plate 13 on the ruler 12 so as to adapt to the printing media with different thicknesses. The arc surface of the sun wheel 17 is in soft contact with the upper surface of the printing medium, so that the printing medium is compacted, and the phenomenon of unevenness of the clamping wheel assembly 20 in the process of clamping the printing medium is avoided. After the action is finished, the control component controls the clamping cylinder assembly 19 to contract again, the two clamping wheel assemblies 20 move towards the middle, and the two sides of the printing medium are clamped, so that the printing medium is ensured to be printed in the middle. The control component controls the clamping cylinder assembly 19 to extend, the clamping wheel assembly 20 moves towards two sides, and the printing medium is released. The control component controls the extension of the material blocking cylinder 14 to lift the scraper component 9, and the printing medium enters a printing area along with the conduction band.

With reference to fig. 4 and 5, the device for cleaning the printing head of the present invention includes a motor 30 having a speed reducer 29, wherein the motor 30 drives a transmission shaft 28 to rotate through the speed reducer 29. The speed reducer 29 is located in the middle of the transmission shaft 28, and the left and right ends of the transmission shaft 28 are respectively provided with a synchronizing wheel 27. Two driven wheels 37 are arranged below the synchronous wheel 27 at each side at a certain interval, and a synchronous belt 31 is wound around the synchronous wheel 27 and the driven wheels 37 at the same side, so that the synchronous belt 31 at the same side forms a vertical section at one end and a horizontal section at the other end. The timing belt 31 is rotated by the timing pulley 27 and the driven pulley 37 on the same side.

Two groups of cleaning devices are arranged between the synchronous belts 31 on the left side and the right side, and the left end and the right end of each group of cleaning device are fixedly connected with the horizontal sections of the synchronous belts 31 on the same side. When the synchronous belt 31 rotates, the cleaning device is driven to move. Each set of cleaning devices comprises a suction box 33 located below the spray head. The suction box 33 communicates with an external negative pressure generating device 38. The left and right ends of the air suction box 33 are fixedly connected with the synchronous belt 31 on the same side, so that the synchronous belt 31 can drive the air suction box 33 to move. The suction box 33 is opened at its top surface with a hole and provided with a suction nozzle 34, and at the same time, a blade 35 is provided at the edge of the top surface of the suction box 33 to extend across the entire suction box 33 in the longitudinal direction. The bellows 32 is also fixed to the suction box 33.

And each group of cleaning equipment is provided with an optical eye reflecting plate 36, and the extreme position of the movement of each group of cleaning equipment is provided with an optical eye matched with the optical eye reflecting plate 36. The photo eye is connected to a controller which is connected to the motor 30.

When the device for cleaning the printing nozzle works, the motor 30 drives the transmission shaft 28 to rotate through the speed reducer 29, and the transmission shaft 28 drives the synchronous belt 31 to rotate through the synchronous wheel 27 and the driven wheel 37 while rotating, so that the air suction box 33 moves below the nozzle. During the movement of the air suction box 33, the negative pressure generating device 38 generates suction air through the suction nozzle 34 to suck ink dots below the nozzles into the air suction box 33, and simultaneously, a layer of oil film is formed below the nozzles. The scraper 35 on the air suction box 33 scrapes the oil film below the nozzle to the top surface of the air suction box 33 and then flows into the air suction box 33 through the hole on the top surface of the air suction box 33. When the cleaning device moves to the optical eye reflecting plate 36 to trigger the optical eye, the optical eye feeds back a signal to the controller, the controller feeds back a signal to the motor 30, the motor 30 stops rotating, and the air suction box 33 stops advancing. Subsequently, the motor 30 is reversely rotated, the timing belt 31 is reversely rotated, and the suction box 33 is reversely moved to the initial position.

As shown in fig. 6, the utility model provides a print conduction band automatic gluing belt cleaning device is including arranging rubberizing device 39 and the frictioning device 40 that the conduction band 8 curls the end, and rubberizing device 39 is located the top of conduction band 8, and frictioning device 40 is located the below of conduction band 8, and rubberizing device 39 and frictioning device 40 all cross whole conduction band 8 on width direction.

Referring to fig. 7 and 8, the glue applicator 39 includes a support tube 39-1 fixed above the tape 8, and the support tube 39-1 extends across the entire tape 8 in the width direction. The left end and the right end of the supporting tube 39-1 are respectively provided with an installation seat 39-2, and the two installation seats 39-2 are respectively fixed on the left side and the right side of the guide belt 8. The support tube 39-1 is provided with a rack 39-3 and a guide rail 39-4. The guide rail 39-4 is provided with a slide block 39-5 which can move along the guide rail 39-4, the slide block 39-5 is provided with an L-shaped mounting plate 39-8, the servo motor 39-6 is arranged on the horizontal part of the L-shaped mounting plate 39-8, and the glue spraying barrel 39-7 is fixed on the vertical part of the L-shaped mounting plate 39-8 through a U-shaped mounting plate 39-11 which surrounds the outside of the glue spraying barrel. The gear 39-9 is fixed on the output shaft of the servo motor 39-6 through the expansion sleeve 39-10, and the gear 39-9 is meshed with the rack 39-3.

Referring to fig. 7 and 9, the squeegee 40 is integrally fixed to the printer by side plates 40-9 on both left and right sides. The doctor apparatus 40 includes a hopper 40-1 positioned below the belt 8, the hopper 40-1 spanning the entire belt 8 in the width direction. A cleaning water pipe 40-2 and a scraping blade angle adjusting component are arranged above the funnel 40-1. The cleaning water pipe 40-2 is provided with a pore, the cleaning water pipe 40-2 is connected with an external cleaning liquid supply device through a water valve 40-3, the cleaning liquid supplied by the cleaning liquid supply device is sprayed on the surface of the guide belt 8 through the pore of the cleaning water pipe 40-2, and the scraping blade angle adjusting assembly hangs the glue on the surface of the guide belt into the funnel 40-1. Each side plate 40-9 is provided with a guide belt pinch roller 40-10 which can freely roll, and the guide belt pinch rollers 40-10 are tightly attached to the guide belt 8.

The scraping blade angle adjusting component comprises adjusting nuts 40-4 positioned on the left side and the right side, each adjusting nut 40-4 penetrates through a thread block 40-5, the adjusting nuts 40-4 are in thread fit with the thread blocks 40-5, the front end of each adjusting nut 40-4 is hinged with one end of a connecting piece 40-6, the other ends of the two connecting pieces 40-6 on the left side and the right side are respectively fixed on the left side and the right side of a scraping blade fixing frame 40-7, and the scraping blades 40-8 are arranged on the scraping blade fixing frame 40-7.

When the automatic gluing and cleaning device for the printing guide belt works, the water valve 40-3 is opened, the cleaning liquid is sprayed on the outer surface of the guide belt through the pores in the cleaning water pipe 40-2, the contact angle and force between the scraping piece 40-8 and the guide belt are adjusted through the scraping piece angle adjusting assembly, glue on the outer surface of the guide belt is scraped off by the scraping piece 40-8 through high-speed rotation of the guide belt, the glue flows into the funnel 40-1, the funnel 40-1 is connected with the waste barrel through the corrugated pipe, and after the cleaning work on the outer surface of the guide belt is finished, the glue in the waste barrel can be subjected to environment-. The funnel 40-1 is connected with the side plate 40-9 through 4 bolts, so that the funnel is convenient to disassemble and clean.

Claims

1. The utility model provides a digital printing system of panel which characterized in that, includes the high-speed printing production line of scanning formula flatbed printer and duct formula that is controlled by a control unit, and scanning formula flatbed printer and duct formula are high-speed to be printed the production line and are used identical printing ink, shower nozzle and color management software, wherein:

the ducted high-speed printing production line comprises a printing module (7), wherein a plate to be printed at a feeding hole (5) is conveyed to a discharging hole (6) through the printing module (7) by a guide belt (8), and a pattern is printed on the plate by the printing module (7); a plate printing centering material blocking and clamping device is arranged at the feeding hole (5), a device for cleaning a printing nozzle is arranged on the printing module (7), and an automatic gluing and cleaning device is arranged at the discharging hole (6);

the plate printing centering material blocking and clamping device comprises side plates (40-9) positioned on the left side and the right side, and a rotating shaft (21), a shaft (22) and a guide rail (39-4) which are sequentially arranged from front to back are arranged between the side plates (40-9) on the two sides;

the scraper component (9) is arranged on the rotating shaft (21) along the axial direction, the left end and the right end of the rotating shaft (21) are respectively provided with a driving component, the driving components on the two sides are respectively fixed on the side plates (40-9) on the two sides, and the rotating shaft (21) is driven by the driving components to rotate around the central axis thereof;

n sun wheels (17) capable of freely rolling are arranged on the shaft (22) in a penetrating way; adjusting nuts (40-4) which can be adjusted up and down are respectively arranged on the side plates (40-9) on the left side and the right side, the bottoms of the adjusting nuts (40-4) on the left side and the right side are respectively connected with the left end and the right end of the shaft (22), the shaft (22) is fixed between the side plates (40-9) on the two sides by the adjusting nuts (40-4), and the shaft (22) is driven to move up and down when the adjusting nuts (40-4) are adjusted up and down;

a clamping cylinder assembly (19) with a left output shaft and a right output shaft is arranged in the middle of the guide rail (39-4), a clamping wheel assembly (20) penetrating through the guide rail (39-4) is respectively arranged on the left side and the right side of the clamping cylinder assembly (19), and the two clamping wheel assemblies (20) are respectively fixedly connected with the two output shafts of the clamping cylinder assembly (19);

the device of shower nozzle is printed in washing is including motor (30) that has speed reducer (29), motor (30) are rotated through speed reducer (29) drive transmission shaft (28), speed reducer (29) are located the middle part of transmission shaft (28), the left side of transmission shaft (28), the right side both ends are equipped with a synchronizing wheel (27) respectively, be equipped with two interval certain distance in the below of each side synchronizing wheel (27) from driving wheel (37), synchronizing wheel (27) and from driving wheel (37) of a hold-in range (31) around the homonymy, make synchronizing wheel (27) and from driving wheel (37) of homonymy drive hold-in range (31) and rotate, be equipped with at least a set of belt cleaning device between hold-in range (31) of the left and right sides, every cleaning equipment's of group left side, the right side both ends are connected fixedly with hold-in:

each group of cleaning equipment comprises an air suction box (33) positioned below the spray head, the air suction box (33) is communicated with negative pressure generating equipment (38), the left end and the right end of the air suction box (33) are fixedly connected with a synchronous belt (31) on the same side, a hole is formed in the top surface of the air suction box (33) and is provided with a suction nozzle (34), the negative pressure generating equipment (38) generates suction air through the suction nozzle (34), and the edge of the top surface of the air suction box (33) is provided with a scraping blade (40-8);

printing conduction band automatic gluing belt cleaning device is including arranging rubberizing device (39) and frictioning device (40) in conduction band (8) curling end, and rubberizing device (39) are located the top of conduction band (8), and frictioning device (40) are located the below of conduction band (8), and whole conduction band (8) are all striden on width direction in rubberizing device (39) and frictioning device (40), wherein:

the gluing device (39) comprises a supporting pipe (39-1) fixed above the guide belt (8), the supporting pipe (39-1) transversely spans the whole guide belt (8) in the width direction, a rack (39-3) and a guide rail (39-4) are arranged on the supporting pipe (39-1), a sliding block (39-5) capable of moving along the guide rail (39-4) is arranged on the guide rail (39-4), a servo motor (39-6) and a glue spraying barrel (39-7) are fixed on the sliding block (39-5), a gear (39-9) is arranged on an output shaft of the servo motor (39-6), and the gear (39-9) is meshed with the rack (39-3);

the glue scraping device (40) comprises a funnel (40-1) located below the guide belt (8), the funnel (40-1) transversely crosses the whole guide belt (8) in the width direction, a cleaning water pipe (40-2) and a scraping blade angle adjusting assembly are arranged above the funnel (40-1), a fine hole is formed in the cleaning water pipe (40-2), the cleaning water pipe (40-2) is connected with an external cleaning liquid supply device, cleaning liquid supplied by the cleaning liquid supply device is sprayed on the surface of the guide belt (8) through the fine hole of the cleaning water pipe (40-2), and glue on the surface of the guide belt is hung in the funnel (40-1) through the scraping blade angle adjusting assembly.

2. The digital printing system for plates according to claim 1, wherein the driving assembly includes a material blocking cylinder (14) disposed on the side plate (40-9), an output arm of the material blocking cylinder (14) is hinged to one end of a connecting member (40-6), and the other end of the connecting member (40-6) is sleeved on the left end or the right end of the rotating shaft (21).

3. The digital printing system for plates according to claim 2, wherein a scale (12) is provided on the side plate (40-9), an indicating plate (13) moving up and down along with the adjusting nut (40-4) is provided on the adjusting nut, and the indicating plate (13) is engaged with the scale (12).

4. The digital printing system for plates according to claim 1, wherein the doctor blade angle adjustment assembly comprises adjustment nuts (40-4) located on the left and right sides, each adjustment nut (40-4) is inserted into one threaded block (40-5), the adjustment nuts (40-4) are in threaded fit with the threaded blocks (40-5), the front end of each adjustment nut (40-4) is hinged to one end of one connecting piece (40-6), the other ends of the two connecting pieces (40-6) on the left and right sides are respectively fixed on the left and right sides of the doctor blade fixing frame (40-7), and the doctor blade (40-8) is arranged on the doctor blade fixing frame (40-7).

5. The digital printing system for plates according to claim 4, wherein a side plate (40-9) is respectively provided on the left and right sides of the hopper (40-1) and the doctor blade angle adjustment assembly, each side plate (40-9) is provided with a guide belt pinch roller (40-10) capable of freely rolling, and the guide belt pinch rollers (40-10) are tightly attached to the guide belt (8).