Spraying device and pattern spraying process for paper cup production

Abstract

The present invention relates to the technical field of spraying equipment, and discloses a spraying device and a pattern spraying process for paper cup production. The present invention presses the substrate to be sprayed onto the upper surface of the spraying support platform through a spraying fixed frame to fix the position of the spraying substrate and ensure that the spraying position in the later stage is consistent, and then the spraying support arm slides horizontally within the range limited by two extended suspension rods, and sprays during the movement through the first spraying structure. After the first layer of spraying is completed, the spraying plate changing mechanism rewinds and replaces the plate within the lateral movement range of the spraying support arm to the next plate, and the plate cleaning mechanism cleans the first plate after spraying while rewinding and replacing; the next spraying structure sprays the next spray liquid in the direction of the spraying plate changing mechanism, so that the spraying process of the spraying substrate can be continuously carried out, avoiding the influence of spraying position offset caused by repositioning, and improving the production efficiency of the spraying process.

Description

Technical Field

[0001] The invention relates to the technical field of spraying equipment, in particular to a spraying device and a pattern spraying process for producing paper cups. Background Art

[0002] Paper cups are a convenient drinking tool, and their production process includes several key steps. The basic structure of paper cups mainly includes the cup body and the cup bottom, and is usually made of single-sided or double-sided PE coated paper. The production process involves major processes such as PE coating, slitting, printing, die-cutting and molding. Traditional paper cup pattern production mainly relies on screen printing and offset printing technology. Although these methods can achieve basic pattern printing, they have obvious limitations in accuracy and complexity. In particular, for application scenarios that require fine gradients or high-resolution images, traditional processes are often difficult to meet the needs. In addition, traditional printing also faces problems of environmental pollution and resource consumption. With the improvement of environmental awareness, its sustainability has been questioned. These problems have prompted the industry to continuously explore more advanced and environmentally friendly pattern production technologies to meet the market demand for high-quality, personalized paper cups.

[0003] In the development of paper cup pattern spraying technology, choosing the right spraying material is crucial. With the continuous improvement of environmental awareness, traditional polyethylene (PE) coated paper cups are facing severe challenges. In the paper cup pattern spraying process, pattern design and transfer is a crucial link. With the development of technology, paper cup patterns tend to be complex and colorful, while the spraying process in the existing technology is slow for direct multi-color or multi-layer printing, while the whole plate spraying method is faster, but the plate changing process is complicated or multiple spraying equipment are required for continuous spraying according to the number of plates, resulting in high investment costs and requiring additional positioning to prevent spraying errors, affecting the rate of paper cup spraying production. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a spraying device and a pattern spraying process for paper cup production.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A spraying device comprises: a whole-plate feeding mechanism, a spraying support platform, a spraying driving mechanism, a spraying fixed frame, a spraying plate changing mechanism, a spraying support arm and a stacking and collecting mechanism, wherein the whole-plate feeding mechanism and the stacking and collecting mechanism are respectively arranged on both sides of the spraying support platform, and the whole-plate feeding mechanism can provide a whole plate of spraying substrate to the upper surface of the spraying support platform one by one, and the whole plate of spraying substrate after spraying can be transported one by one to the inside of the stacking and collecting mechanism for collection; a spraying limit platform and two whole-plate driving units are arranged on the top of the spraying support platform, and the two whole-plate driving units are respectively arranged on both sides of the spraying limit platform, and the two whole-plate driving units can drive the whole plate of spraying substrate to move from one end close to the whole-plate feeding mechanism to one end close to the stacking and collecting mechanism; the spraying driving mechanism comprises A lifting drive bracket and a transverse drive arm, the lifting drive bracket is arranged at the top of the spray support platform and at the outside of the whole plate drive unit, the transverse drive arm can be lifted and lowered under the drive of the lifting drive bracket, and extension suspension rods are fixedly arranged at both ends of the transverse drive arm, the spray support arm is slidably connected with the transverse drive arm, and the spray support arm can slide laterally within the range restricted by the two extension suspension rods; the spray fixed frame is hoisted at the bottom ends of the two extension suspension rods, the spray plate changing mechanism is installed inside the spray fixed frame, and plate cleaning mechanisms are respectively arranged at both ends of the spray plate changing mechanism, the spray plate changing mechanism can reel and replace the plate within the transverse moving range of the spray support arm, and the plate cleaning mechanism can clean the plate before the plate is reeled.

[0007] Preferably, the spraying fixed frame includes a mounting frame and two pressing rods, the two pressing rods can move along the moving direction of the entire spraying substrate under the limitation of the mounting frame, the mounting frame is suspended at the bottom ends of the two extending suspension rods, and the distance between the mounting frame and the two extending suspension rods can be adjusted by a fixed driving cylinder; the plate changing mechanism includes two plate retracting and releasing units and a spraying plate symmetrically arranged at the top of the mounting frame; of the two plate retracting and releasing units, while one plate retracting and releasing unit is reeling, the other plate retracting and releasing unit is unreeling, so as to keep the spraying plate straight between the two plate retracting and releasing units.

[0008] Preferably, the layout retracting and unreeling units include a winding roller and a guide roller, a winding drive motor is provided on one side of the winding roller, and the guide roller is provided below the side of the winding roller close to the pressing rod; the two ends of the spray layout are respectively passed around the corresponding guide rollers and fixed between the winding rollers, and under the guidance of the guide rollers, the spray layout is coplanar with the lower surface of the pressing rod.

[0009] Preferably, a spray box is provided at the bottom end of the spray arm, and the spray box is open toward one side of the spray limit platform. A plurality of spray heads are movably provided inside the spray box, and each of the spray heads can spray a spray liquid; a pressurized air pump is provided on the top of the spray box, and the pressurized air pump can supply gas to the spray box, thereby increasing the air pressure inside the spray box to drive the spray liquid sprayed by the spray head to pass through the spray plate surface and move toward the entire spray substrate.

[0010] Preferably, the two plate cleaning mechanisms are respectively arranged between the two pressing rods and the adjacent plate retracting units. When the sprayed plate is retracted by the two plate retracting units to replace the plate pattern located between the two pressing rods, the sprayed plate is cleaned by the adjacent plate cleaning mechanism before being retracted by the plate retracting units.

[0011] Preferably, the plate surface cleaning mechanism includes an upper cleaning roller, an upper collecting roller and a lower collecting roller; the upper cleaning roller can output cleaning liquid and generate friction with the moving sprayed plate surface to clean the sprayed plate surface; the upper collecting roller and the lower collecting roller are both hollow structures, and negative pressure can be generated inside the hollow structures of the upper collecting roller and the lower collecting roller to collect the liquid on the upper surface of the sprayed plate surface and the liquid that passes through the sprayed plate surface and enters the lower surface of the sprayed plate surface, respectively.

[0012] Preferably, the whole-page driving unit includes a driving belt, a belt driving pulley, several belt tensioning pulleys and a belt driving motor, the driving belt is tensioned on the outside of the belt driving pulley and the several belt tensioning pulleys, and the belt driving motor is powered and connected to the belt driving pulley for transmission; the spraying support platform also includes a lifting limit baffle and a baffle driving cylinder, the lifting limit baffle is arranged at one end of the spraying limit platform close to the stacking and collecting mechanism, and the lifting limit baffle is raised under the baffle driving cylinder to limit the movement of the entire page of sprayed substrate.

[0013] Preferably, the whole-plate loading mechanism includes a feed rack, a storage table is arranged inside the feed rack, and feed drive rails are arranged on both sides of the storage table, and the feed drive rails can drive the storage table to rise and fall inside the feed rack; the storage table is used to place a whole stack of sprayed substrates, and a feed transfer mechanism is arranged on the top of the feed rack, and the feed transfer mechanism includes a plurality of feed rollers, a fixed hanger and an installation hanger, and the fixed hanger and the installation hanger are elastically connected by a plurality of lifting telescopic rods, and a plurality of feed shafts are arranged at the bottom end of the installation hanger, and each of the feed rollers is respectively sleeved on the outside of each of the feed shafts, and the synchronous rotation of each of the feed shafts can drive each of the feed rollers to rotate synchronously.

[0014] Preferably, the stacking and collecting mechanism includes a collecting frame, a collecting driving rail, and a collecting table, wherein the collecting driving rail can drive the collecting table to rise and fall inside the collecting frame; a plurality of blocking bars are arranged on the side of the top of the collecting table away from the spraying support platform, and the entire plate of sprayed substrate that has been sprayed can be stacked and collected on the top of the collecting table under the blocking of each of the blocking bars.

[0015] A pattern spraying process for paper cup production, using the above-mentioned spraying device, comprises the following steps:

[0016] A whole stack of paper cup plates to be sprayed is placed inside the whole-plate feeding mechanism, and the whole-plate feeding mechanism provides a whole-plate paper cup plate to be sprayed to the upper surface of the spraying support platform;

[0017] The whole paper cup plate to be sprayed is transported by the whole-plate driving unit to the bottom of the spray fixed frame of the spray limit table;

[0018] The spraying fixed frame moves downward under the drive of the lifting driving bracket to press the entire paper cup plate to be sprayed onto the upper surface of the spraying support platform;

[0019] The lateral driving arm drives the spraying support arm to slide horizontally within the range limited by the two extension suspension rods, and sprays the first spraying liquid in the direction of the spraying plate changing mechanism;

[0020] The spray plate changing mechanism rewinds the plate within the lateral moving range of the spray arm and changes it to the next plate. During the rewinding and changing, the plate cleaning mechanism cleans the first plate after spraying.

[0021] The lateral driving arm drives the spraying support arm to slide horizontally within the range limited by the two extension booms, and sprays the next spraying liquid in the direction of the spraying plate changing mechanism;

[0022] The spray plate changing mechanism rewinds the plate within the lateral moving range of the spray arm and changes it to the next plate until all types of spray liquids are sprayed;

[0023] The whole-page paper cup plates that have been sprayed are transported one by one to the inside of the stacking and collecting mechanism for collection, and the whole-page feeding mechanism provides the next whole-page paper cup plate to be sprayed to the upper surface of the spraying support platform.

[0024] Compared with the prior art, the present invention provides a spraying device and a pattern spraying process for paper cup production, which has the following beneficial effects:

[0025] 1. This spraying device, under the drive of the lifting drive bracket, the lateral driving arm drives the spraying fixed frame to move downward through the extended suspension rods at both ends, and presses the entire spray substrate to be sprayed on the upper surface of the spraying support platform to fix the position of the entire spray substrate and ensure that the subsequent spraying position remains consistent. Then, the spraying support arm slides horizontally within the range limited by the two extended suspension rods under the restriction of the lateral driving arm, and the first spray structure of the multiple spray structures of the spray support arm is sprayed during the movement, and the first spray liquid is sprayed in the direction of the spray plate changing mechanism to complete the spraying of the first layer. Then, the spray plate changing mechanism moves the lateral moving plate located at the spray support arm. The plate within the moving range is rolled up and replaced to the next plate. At the same time, the plate cleaning mechanism cleans the first plate after spraying; the lateral driving arm drives the spraying support arm to slide horizontally within the range limited by the two extension booms, and the next spraying structure sprays the next spray liquid in the direction of the spray plate changing mechanism; the spray plate changing mechanism rolls up and replaces the plate within the lateral moving range of the spraying support arm to the next plate until the spraying of all types of spray liquids is completed, so that the spraying process of the entire plate of the spray substrate can be carried out continuously, reducing the investment in equipment while avoiding the influence of spray position offset caused by repositioning, thereby improving the production efficiency of the spraying process.

[0026] 2. This spraying device, since the two ends of the spraying plate are respectively fixed between the corresponding guide rollers and the winding rollers, under the guidance of the guide rollers, the spraying plate and the lower surface of the pressing rod are coplanar, so that when the mounting frame presses the entire spraying substrate on the upper surface of the spraying support platform, the corresponding plate in the spraying plate is pressed above the entire spraying substrate, and when the plate in the spraying plate needs to be replaced, the mounting frame moves upward to release the pressing of the spraying plate, and the two winding drive motors on both sides are retracted and released one by one, and one plate retracting unit can be reeled in while the other plate retracting unit is unreeled, so that the spraying plate is kept straight between the two plate retracting units, and the entire plate of the spraying substrate can be sprayed continuously without the need for rear-end positioning, thereby improving the production efficiency of the spraying process.

[0027] 3. This spraying device, through the setting of a pressurized air pump, makes it possible for the bottom end of the spray box to be tightly attached and sealed to the spray plate surface when the spray head outputs liquid paint. The pressurized air pump can supply gas to the spray box to increase the air pressure inside the spray box. At this time, the gas inside the spray box can only pass through the spray plate surface under a higher air pressure and be output to the entire spray substrate, so that the spray liquid sprayed by the spray head moves with the movement of the gas to the entire spray substrate for spraying, so as to ensure that the sprayed spray liquid can be concentratedly sprayed on the surface of the spray substrate. While saving the spray liquid, it can reduce the pollution to the spray plate surface, reduce the difficulty of later cleaning, and avoid the occurrence of problems such as staining caused by residual spray liquid.

[0028] 4. In this type of spraying device, the sprayed plate is first input into the interior of the nearby plate cleaning mechanism before being rolled up by the plate taking-up unit, and first passes through the upper cleaning roller. The upper cleaning roller outputs the cleaning liquid and generates friction with the moving sprayed plate to clean the sprayed plate, and then passes through the middle position of the upper collecting roller and the lower collecting roller. Negative pressure can be generated inside the hollow structure of the upper collecting roller and the lower collecting roller, thereby collecting the liquid on the upper surface of the sprayed plate and the liquid that passes through the sprayed plate and enters the lower surface of the sprayed plate, so as to avoid leakage of the cleaning liquid and influence on the subsequent spraying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of a whole-plate removing feeding mechanism and a stacking and collecting mechanism of a spraying device of the present invention;

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of a spraying device of the present invention;

[0031] Figure 3 It is a three-dimensional structural schematic diagram of a whole-plate feeding mechanism of a spraying device of the present invention;

[0032] Figure 4 For the present invention Figure 3 A magnified view of part A;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of a stacking and collecting mechanism of a spraying device of the present invention;

[0034] Figure 6 It is a schematic diagram of the assembly structure of a spraying device of the present invention for removing a whole-plate feeding mechanism and a stacking and collecting mechanism;

[0035] Figure 7 This is one of the three-dimensional structural schematic diagrams of a spraying drive mechanism, a spraying fixed frame and a spraying plate changing mechanism of a spraying device of the present invention;

[0036] Figure 8 The second schematic diagram of the three-dimensional structure of the spraying drive mechanism, the spraying fixed frame and the spraying plate changing mechanism of the spraying device of the present invention;

[0037] Fig. 9 It is a three-dimensional structural schematic diagram of a spraying plate changing mechanism of a spraying device of the present invention;

[0038] Fig.10 It is a schematic diagram of the assembly of a spraying support arm of a spraying device of the present invention;

[0039] Fig.11 The present invention is a schematic diagram of the three-dimensional structure of a plate surface cleaning mechanism of a spraying device.

[0040] In the figure: 1. Full-page loading mechanism; 11. Feed rack; 12. Storage table; 13. Feed drive rail; 14. Feed transfer mechanism; 141. Feed roller; 142. Fixed hanger; 143. Mounting hanger; 144. Lifting telescopic rod; 145. Feed shaft; 2. Spraying support platform; 21. Spraying limit table; 22. Full-page drive unit; 221. Drive belt; 222. Belt drive wheel; 223. Belt tensioning wheel; 224. Belt drive motor; 23. Lifting limit baffle; 24. Baffle drive cylinder; 3. Spraying drive mechanism; 31. Lifting drive bracket; 32. Horizontal Driving arm; 33, extension boom; 4, spraying fixed frame; 41, mounting frame; 42, pressing rod; 43, fixed driving cylinder; 5, spraying plate changing mechanism; 51, plate taking-up and releasing unit; 511, winding roller; 512, guide roller; 513, winding drive motor; 52, spraying plate; 6, spraying support arm; 61, spray box; 62, spray head; 63, pressurized air pump; 7, stacking and collecting mechanism; 71, collecting rack; 72, collecting drive rail; 73, collecting table; 74, blocking rod; 8, plate cleaning mechanism; 81, upper cleaning roller; 82, upper collecting roller; 83, lower collecting roller. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a spraying device and a pattern spraying process for paper cup production.

[0043] Example 1: Please refer to Figure 1-Figure 11A spraying device comprises: a whole-plate feeding mechanism 1, a spraying support platform 2, a spraying driving mechanism 3, a spraying fixed frame 4, a spraying plate changing mechanism 5, a spraying support arm 6 and a stacking and collecting mechanism 7, wherein the whole-plate feeding mechanism 1 and the stacking and collecting mechanism 7 are respectively arranged on both sides of the spraying support platform 2, and the whole-plate feeding mechanism 1 can provide a whole-plate of spraying substrates to the upper surface of the spraying support platform 2 one by one, and the whole-plate of spraying substrates after spraying can be transported one by one to the inside of the stacking and collecting mechanism 7 for collection; a spraying limit platform 21 and two whole-plate driving units 22 are arranged on the top of the spraying support platform 2, and the two whole-plate driving units 22 are respectively arranged on both sides of the spraying limit platform 21, and the two whole-plate driving units 22 can drive the whole-plate of spraying substrates to move from one end close to the whole-plate feeding mechanism 1 to one end close to the stacking and collecting mechanism 7; the spraying driving mechanism 3 It includes a lifting drive bracket 31 and a transverse drive arm 32. The lifting drive bracket 31 is arranged at the top of the spray support platform 2 and at the outside of the whole plate drive unit 22. The transverse drive arm 32 can be lifted and lowered under the drive of the lifting drive bracket 31. Extension suspension rods 33 are fixedly arranged at both ends of the transverse drive arm 32. The spray support arm 6 is slidably connected with the transverse drive arm 32, and the spray support arm 6 can slide laterally within the range restricted by the two extension suspension rods 33; the spray fixed frame 4 is suspended at the bottom of the two extension suspension rods 33, and the spray plate changing mechanism 5 is installed inside the spray fixed frame 4. Plate cleaning mechanisms 8 are respectively arranged at both ends of the spray plate changing mechanism 5. The spray plate changing mechanism 5 can reel and replace the plate within the transverse moving range of the spray support arm 6, and the plate cleaning mechanism 8 can clean the plate before the plate is reeled.

[0044] First, a whole stack of spray substrates to be sprayed (the spray substrates can be plate-shaped spray substrates of a certain specification that can be sprayed, such as cardboard, plastic board, other composite paper, steel plate, etc.) is placed inside the whole-sheet loading mechanism 1 by means of a forklift or the like. The whole-sheet loading mechanism 1 provides a whole sheet of spray substrates to be sprayed to the upper surface of the spray support platform 2 each time. The whole sheet of spray substrates to be sprayed are transported to the bottom of the spray fixed frame 4 of the spray limit platform 21 by the joint transport of the whole-sheet loading mechanism 1 and the whole-sheet driving unit 22 (in the specific implementation, there is a blocking member, which limits the staying position of the whole sheet of spray substrates to be located directly below the spray fixed frame 4, and the baffle driving air supply described later can be used for specific purposes). The cylinder 24 drives the lifting and lowering of the lifting limit baffle 23 to limit the staying position of the entire version of the spraying substrate), and then, under the drive of the lifting drive bracket 31, the lateral driving arm 32 drives the spraying fixed frame 4 to move downward through the extension suspension rods 33 at both ends, and presses the entire version of the spraying substrate to be sprayed on the upper surface of the spraying support platform 2 to fix the position of the entire version of the spraying substrate and ensure that the subsequent spraying position remains consistent, and then the spraying support arm 6 slides horizontally within the range limited by the two extension suspension rods 33 under the limitation of the lateral driving arm 32, and the first spraying structure of the multiple spraying structures (hereinafter referred to as the spraying head 62) of the spraying support arm 6 is sprayed during the movement, and the spraying plate changing mechanism 5 is moved to the spraying plate changing mechanism 5. The first spraying liquid is sprayed in the direction to complete the spraying of the first layer (specifically, when spraying for the first time, it can be a base material, such as an adsorbent or a pigment base color, etc.), and then the spray plate changing mechanism 5 reels and replaces the plate within the lateral moving range of the spray support arm 6 to the next plate, and the plate cleaning mechanism 8 cleans the first plate after spraying during the rewinding and replacement; the lateral driving arm 32 drives the spray support arm 6 to slide laterally within the range limited by the two extension suspension rods 33, and the next spraying structure sprays the next spraying liquid (other spraying materials, such as adhesive materials or adhesive colors, etc.) in the direction of the spray plate changing mechanism 5, and when used specifically, the spraying range and spraying distance from the first plate to the last plate should be followed. The material quantity and the spraying color depth are set to decrease in sequence, but in specific use, they can be adjusted according to actual conditions); the spraying plate changing mechanism 5 will reel up the plate within the lateral moving range of the spraying support arm 6 and replace it to the next plate until the spraying of all types of spraying liquid is completed; the whole plate of spraying substrates that have been sprayed are transported one by one to the inside of the stacking and collecting mechanism 7 through the whole plate driving unit 22 for collection, and the whole plate feeding mechanism 1 provides the next whole plate of spraying substrate to be sprayed to the upper surface of the spraying support platform 2, so that the spraying process of the whole plate of spraying substrate can be carried out continuously, reducing the investment in equipment while avoiding the influence of spraying position offset caused by repositioning, thereby improving the production efficiency of the spraying process.

[0045] Example 2: Please refer to Figure 1-Figure 2 , Figure 6-Figure 11The difference between the above embodiments is that the spraying fixed frame 4 includes a mounting frame 41 and two pressing rods 42, the two pressing rods 42 can move along the moving direction of the entire spraying substrate under the limit of the mounting frame 41, the mounting frame 41 is suspended at the bottom of the two extension suspension rods 33, and the distance between the mounting frame 41 and the two extension suspension rods 33 can be adjusted by fixing the driving cylinder 43; the plate changing mechanism 5 includes two plate retracting units 51 and a spraying plate 52 symmetrically arranged at the top of the mounting frame 41; in the two plate retracting units 51, when one plate retracting unit 51 is reeling, the other plate retracting unit 51 is unreeling, so as to keep the spraying plate 52 straight between the two plate retracting units 51.

[0046] The layout retracting and unreeling units 51 include a winding roller 511 and a guide roller 512. A winding drive motor 513 is provided on one side of the winding roller 511, and the guide roller 512 is provided below the side of the winding roller 511 close to the pressing rod 42. The two ends of the spray layout 52 are respectively passed around the corresponding guide rollers 512 and fixed between the winding roller 511. Under the guidance of the guide roller 512, the spray layout 52 is coplanar with the lower surface of the pressing rod 42.

[0047] Therefore, when in use, since the two ends of the spraying plate 52 are respectively fixed between the corresponding guide rollers 512 and the winding roller 511, under the guidance of the guide rollers 512, the spraying plate 52 and the lower surface of the pressing rod 42 are coplanar, so that when the mounting frame presses the entire spraying substrate on the upper surface of the spraying support platform 2, the corresponding layout in the spraying plate 52 is pressed above the entire spraying substrate, and when the layout in the spraying plate 52 needs to be replaced, the mounting frame 41 moves upward to release the pressing of the spraying plate 52, and the two winding drive motors 513 on both sides are retracted and released (in specific use, the winding drive motor 513 is a servo motor, and the spraying is controlled by the precise control of the winding drive motor 513 The position of each plate in the plate 52 is aligned with the bottom of the spraying fixed frame 4 each time spraying is performed, and one plate retracting unit 51 can be reeled in while the other plate retracting unit 51 can be unreeled, so as to keep the spraying plate 52 straight between the two plate retracting units 51, and to replace the next plate (in specific use, all required plates can be constructed on the spraying plate 52, or multiple multiples of all plates can be constructed. When multiple multiples of all plates are used, the entire roll of the spraying plate 52 can be reeled in to one side and then reset, saving a certain amount of reset time), and the entire plate of the spraying substrate can be sprayed continuously without the need for rear-end positioning, thereby improving the production efficiency of the spraying process.

[0048] A spray box 61 is provided at the bottom end of the spray arm 6, and the spray box 61 is open toward one side of the spray limit platform 21. A plurality of spray heads 62 are movably provided inside the spray box 61, and each spray head 62 can spray a spray liquid; a pressurized air pump 63 is provided on the top of the spray box 61, and the pressurized air pump 63 can supply gas to the spray box 61, thereby increasing the air pressure inside the spray box 61 to drive the spray liquid sprayed by the spray head 62 to pass through the spray plate surface 52 and move toward the entire spray substrate.

[0049] During use, through the setting of the pressurized air pump 63, when the spray head 62 outputs liquid pigment (the amount of spray liquid output is slightly larger than the amount of spray liquid actually required for spraying the substrate), the bottom end of the spray box 61 is tightly attached to and sealed against the spray plate 52, and the pressurized air pump 63 can supply gas to the spray box 61 to increase the air pressure inside the spray box 61. At this time, the gas inside the spray box 61 can only pass through the spray plate 52 under a higher air pressure and be output to the entire spray substrate, so that the spray liquid sprayed by the spray head 62 moves toward the entire spray substrate with the movement of the gas to ensure that the spray liquid can be concentrated on the surface of the spray substrate. While saving the spray liquid, it can reduce the pollution to the spray plate 52, reduce the difficulty of later cleaning, and avoid the occurrence of problems such as staining caused by residual spray liquid.

[0050] The two plate cleaning mechanisms 8 are respectively arranged between the two pressing rods 42 and the nearby plate retracting units 51. When the spray plate 52 is retracted by the two plate retracting units 51 to change the plate pattern located between the two pressing rods 42, the spray plate 52 is cleaned by the nearby plate cleaning mechanism 8 before being rolled up by the plate retracting unit 51.

[0051] The plate surface cleaning mechanism 8 includes an upper cleaning roller 81, an upper collecting roller 82 and a lower collecting roller 83; the upper cleaning roller 81 can output cleaning liquid and generate friction with the moving spray plate surface 52 to clean the spray plate surface 52; the upper collecting roller 82 and the lower collecting roller 83 are both hollow structures, and negative pressure can be generated inside the hollow structures of the upper collecting roller 82 and the lower collecting roller 83 to collect the liquid on the upper surface of the spray plate surface 52 and the liquid that passes through the spray plate surface 52 and enters the lower surface of the spray plate surface 52 respectively.

[0052] Therefore, when in use, the spray plate 52 is first input into the interior of the nearby plate cleaning mechanism 8 before being rolled up by the plate retracting unit 51, and first passes through the upper cleaning roller 81. The upper cleaning roller 81 outputs cleaning liquid (the cleaning liquid can be output by the setting of a liquid pump) and generates friction with the moving spray plate 52, thereby cleaning the spray plate 52, and then passes through the middle position of the upper collecting roller 82 and the lower collecting roller 83. Negative pressure can be generated inside the hollow structure of the upper collecting roller 82 and the lower collecting roller 83 (negative pressure can be generated by the setting of a liquid pump), thereby collecting the liquid on the upper surface of the spray plate 52 and the liquid that passes through the spray plate 52 and enters the lower surface of the spray plate 52, thereby avoiding leakage of the cleaning liquid and affecting the subsequent spraying process.

[0053] Example 3: Please refer to Figure 1-Figure 8 , which is different from the above-mentioned embodiment, is that the whole-plate driving unit 22 includes a driving belt 221, a belt driving wheel 222, a plurality of belt tensioning wheels 223 and a belt driving motor 224, the driving belt 221 is tensioned on the outside of the belt driving wheel 222 and the plurality of belt tensioning wheels 223, and the belt driving motor 224 is connected to the belt driving wheel 222 for transmission; the spraying support platform 2 also includes a lifting limit baffle 23 and a baffle driving cylinder 24, and the lifting limit baffle 23 is arranged on the spraying limit platform 21 near the stacking collection At one end of the mechanism 7, the lifting and limiting baffle 23 is lifted under the baffle driving cylinder 24 to limit the movement of the entire spray substrate, so that the movement of the spray substrate can be driven by the friction between the driving belt 221 of the entire drive unit 22 and the spray substrate, and the lifting and limiting baffle 23 is lifted under the baffle driving cylinder 24 to limit the movement of the entire spray substrate, so that the spray substrate is transported and limited to the bottom of the spray fixed frame 4 of the spray limiting platform 21, effectively positioning the spray substrate to ensure the alignment of the spray pattern of the multi-layer spraying.

[0054] The whole-page loading mechanism 1 includes a feed frame 11, a storage table 12 is arranged inside the feed frame 11, and feed drive rails 13 are arranged on both sides of the storage table 12. The feed drive rails 13 can drive the storage table 12 to rise and fall inside the feed frame 11; the storage table 12 is used to place a whole stack of sprayed substrates, and a feed transfer mechanism 14 is arranged on the top of the feed frame 11. The feed transfer mechanism 14 includes a plurality of feed rollers 141, a fixed hanger 142 and an installation hanger 143. The fixed hanger 142 and the installation hanger 143 are elastically connected by a plurality of lifting telescopic rods 144. A plurality of feed shafts 145 are arranged at the bottom end of the installation hanger 143. Each feed roller 141 is respectively sleeved on the outside of each feed shaft 145, and the synchronous rotation of each feed shaft 145 can drive each feed roller 141 to rotate synchronously.

[0055] Therefore, when in use, through the action of the hoisting telescopic rod 144, each feed roller 141 is brought into contact with the entire plate of sprayed substrate at the top of the storage table 12, and the synchronous rotation of each feed shaft 145 can drive each feed roller 141 to rotate synchronously, so as to convey the entire plate of sprayed substrate at the top to the upper surface of the coating support platform 2, and after conveying one sprayed substrate, the feed drive guide rail 13 can drive the storage table 12 to rise inside the feed frame 11, and the auxiliary hoisting telescopic rod 144 brings each feed roller 141 into contact with the entire plate of sprayed substrate at the top of the next storage table 12, thereby conveying the entire plate of sprayed substrate one by one.

[0056] The stacking and collecting mechanism 7 includes a collecting frame 71, a collecting driving guide rail 72, and a collecting table 73. The collecting driving guide rail 72 can drive the collecting table 73 to rise and fall inside the collecting frame 71. A plurality of blocking rods 74 are arranged on the side of the top of the collecting table 73 away from the spraying support platform 2. The whole plate of sprayed substrates after spraying can be stacked and collected on the top of the collecting table 73 under the obstruction of each blocking rod 74, so that the whole plate of sprayed substrates after spraying can be collected as a whole to facilitate the subsequent processing of the sprayed substrates.

[0057] Embodiment 4: A pattern spraying process for paper cup production, using a spraying device as described in any one of Embodiments 1 to 3, comprising the following steps:

[0058] The whole stack of paper cup plates to be sprayed is placed inside the whole-sheet feeding mechanism 1, and the whole-sheet feeding mechanism 1 provides a whole-sheet paper cup plate to be sprayed to the upper surface of the spraying support platform 2;

[0059] The whole paper cup plate to be sprayed is transported by the whole paper driving unit 22 to the bottom of the spray fixing frame 4 of the spray limiting platform 21;

[0060] The spraying fixed frame 4 is driven by the lifting driving bracket 31 to move downward to press the entire paper cup plate to be sprayed onto the upper surface of the spraying support platform 2;

[0061] The lateral driving arm 32 drives the spraying support arm 6 to slide horizontally within the range limited by the two extension suspension rods 33, and sprays the first spraying liquid in the direction of the spraying plate changing mechanism 5;

[0062] The spray plate changing mechanism 5 rewinds the plate within the lateral moving range of the spray support arm 6 and changes it to the next plate. During the rewinding and changing, the plate cleaning mechanism 8 cleans the first plate after spraying.

[0063] The lateral driving arm 32 drives the spraying support arm 6 to slide horizontally within the range limited by the two extension suspension rods 33, and sprays the next spraying liquid in the direction of the spraying plate changing mechanism 5;

[0064] The spray plate changing mechanism 5 reels the plate within the lateral moving range of the spray arm 6 and changes it to the next plate until the spraying of all types of spray liquid is completed;

[0065] The whole-page paper cup plates that have been sprayed are transported one by one to the inside of the stacking and collecting mechanism 7 for collection, and the whole-page feeding mechanism 1 provides the next whole-page paper cup plate to be sprayed to the upper surface of the spraying support platform 2.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spraying device, characterized in that: include: A whole-plate feeding mechanism, a spraying support platform, a spraying driving mechanism, a spraying fixed frame, a spraying plate changing mechanism, a spraying support arm and a stacking and collecting mechanism. The whole-plate feeding mechanism and the stacking and collecting mechanism are respectively arranged on both sides of the spraying support platform. The whole-plate feeding mechanism can provide a whole plate of spraying substrates to the upper surface of the spraying support platform one by one. The whole plate of spraying substrates that have been sprayed can be transported one by one to the inside of the stacking and collecting mechanism for collection; A spraying limit platform and two full-page driving units are arranged at the top of the spraying support platform. The two full-page driving units are respectively arranged on both sides of the spraying limit platform. The two full-page driving units can drive the full-page spraying substrate to move from one end close to the full-page feeding mechanism to one end close to the stacking and collecting mechanism. The spraying drive mechanism includes a lifting drive bracket and a transverse drive arm, wherein the lifting drive bracket is arranged at the top of the spraying support platform and arranged on the outside of the full-plate drive unit, and the transverse drive arm can be lifted and lowered under the drive of the lifting drive bracket, and extension suspension rods are fixedly arranged at both ends of the transverse drive arm, and the spraying support arm is slidably connected to the transverse drive arm, and the spraying support arm can slide transversely within the range limited by the two extension suspension rods; The spraying fixed frame is hoisted at the bottom ends of the two extending suspension rods, the spraying plate changing mechanism is installed inside the spraying fixed frame, and plate surface cleaning mechanisms are respectively provided at both ends of the spraying plate changing mechanism. The spraying plate changing mechanism can reel in and replace the plate surface within the lateral moving range of the spraying support arm, and the plate surface cleaning mechanism can clean the plate surface before reeling it in. The spraying fixed frame includes a mounting frame and two pressing rods, the two pressing rods can move along the moving direction of the entire spraying substrate under the limit of the mounting frame, the mounting frame is hoisted at the bottom ends of the two extension suspension rods, and the distance between the mounting frame and the two extension suspension rods can be adjusted by a fixed driving cylinder; The plate changing mechanism comprises two plate receiving and releasing units and a spray plate symmetrically arranged at the top of the mounting frame; Among the two plate taking-up and unwinding units, one plate taking-up and unwinding unit is rewinding while the other plate taking-up and unwinding unit is unwinding, so as to keep the spraying plate straight between the two plate taking-up and unwinding units.

2. A spraying device according to claim 1, characterized in that: The layout retracting and unreeling units each include a reeling roller and a guide roller, a reeling drive motor is disposed on one side of the reeling roller, and the guide roller is disposed below a side of the reeling roller close to the pressing rod; The two ends of the spraying plate are respectively passed around the corresponding guide roller and fixed between the winding roller. Under the guidance of the guide roller, the spraying plate is coplanar with the lower surface of the pressing rod.

3. A spraying device according to claim 2, characterized in that: A spray box is arranged at the bottom end of the spray support arm, the spray box is open toward one side of the spray limit platform, and a plurality of spray heads are movably arranged inside the spray box, each of which can spray a spray liquid; A pressurized air pump is arranged on the top of the spray box, and the pressurized air pump can supply gas to the spray box, thereby increasing the air pressure inside the spray box to drive the spray liquid sprayed by the spray head to pass through the spray plate surface and move toward the entire spray substrate.

4. A spraying device according to claim 3, characterized in that: The two plate cleaning mechanisms are respectively arranged between the two pressing rods and the adjacent plate retracting units. When the sprayed plate is retracted by the two plate retracting units to replace the plate pattern located between the two pressing rods, the sprayed plate is cleaned by the adjacent plate cleaning mechanism before being retracted by the plate retracting units.

5. A spraying device according to claim 4, characterized in that: The plate surface cleaning mechanism comprises an upper cleaning roller, an upper collecting roller and a lower collecting roller; The upper cleaning roller can output cleaning liquid and generate friction with the moving spraying plate surface to clean the spraying plate surface; The upper collecting roller and the lower collecting roller are both hollow structures, and negative pressure can be generated inside the hollow structures of the upper collecting roller and the lower collecting roller to collect the liquid on the upper surface of the spraying surface and the liquid passing through the spraying surface and entering the lower surface of the spraying surface, respectively.

6. A spraying device according to claim 1, characterized in that: The full-page driving unit comprises a driving belt, a belt driving wheel, a plurality of belt tensioning wheels and a belt driving motor, the driving belt is tensioned outside the belt driving wheel and the plurality of belt tensioning wheels, and the belt driving motor is connected to the belt driving wheel for transmission and drive; The spraying support platform also includes a lifting limit baffle and a baffle driving cylinder. The lifting limit baffle is arranged at one end of the spraying limit platform close to the stacking and collecting mechanism. Under the baffle driving cylinder, the lifting limit baffle rises to limit the movement of the entire spray substrate.

7. A spraying device according to claim 1, characterized in that: The whole-page feeding mechanism comprises a feeding frame, a storage platform is arranged inside the feeding frame, and feeding drive rails are arranged on both sides of the storage platform, and the feeding drive rails can drive the storage platform to rise and fall inside the feeding frame; The storage table is used to place whole stacks of spray-coated substrates. A feed transfer mechanism is arranged on the top of the feed rack. The feed transfer mechanism includes a plurality of feed rollers, a fixed hanger and an installation hanger. The fixed hanger and the installation hanger are elastically connected by a plurality of lifting telescopic rods. A plurality of feed shafts are arranged on the bottom end of the installation hanger. Each of the feed rollers is respectively sleeved on the outside of each of the feed shafts. The synchronous rotation of each of the feed shafts can drive each of the feed rollers to rotate synchronously.

8. A spraying device according to claim 1, characterized in that: The stacking and collecting mechanism comprises a collecting frame, a collecting driving guide rail, and a collecting table, wherein the collecting driving guide rail can drive the collecting table to rise and fall inside the collecting frame; A plurality of blocking bars are arranged on one side of the top of the collecting platform away from the spraying support platform, and the entire spraying substrate after spraying can be stacked and collected on the top of the collecting platform under the blocking of each of the blocking bars.

9. A pattern spraying process for paper cup production, characterized in that: A spraying device as described in any one of claims 1 to 8 is used, comprising the following steps: A whole stack of paper cup plates to be sprayed is placed inside the whole-plate feeding mechanism, and the whole-plate feeding mechanism provides a whole-plate paper cup plate to be sprayed to the upper surface of the spraying support platform; The whole paper cup plate to be sprayed is transported by the whole-plate driving unit to the bottom of the spray fixed frame of the spray limit table; The spraying fixed frame moves downward under the drive of the lifting driving bracket to press the entire paper cup plate to be sprayed onto the upper surface of the spraying support platform; The lateral driving arm drives the spraying support arm to slide horizontally within the range limited by the two extension suspension rods, and sprays the first spraying liquid in the direction of the spraying plate changing mechanism; The spray plate changing mechanism rewinds the plate within the lateral moving range of the spray support arm and changes it to the next plate. During the rewinding and changing, the plate cleaning mechanism cleans the first plate after spraying. The lateral driving arm drives the spraying support arm to slide horizontally within the range limited by the two extension booms, and sprays the next spraying liquid in the direction of the spraying plate changing mechanism; The spray plate changing mechanism rewinds the plate within the lateral moving range of the spray arm and changes it to the next plate until all types of spray liquids are sprayed; The whole-page paper cup plates that have been sprayed are transported one by one to the inside of the stacking and collecting mechanism for collection, and the whole-page feeding mechanism provides the next whole-page paper cup plate to be sprayed to the upper surface of the spraying support platform.

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