Plastic hand bag processing and forming system

Abstract

The invention relates to the technical field of plastic hand bag processing, in particular to a plastic hand bag processing and forming system which comprises a rack, a limiting device, a control table, a printing roller and an ink pool, the limiting device, the control table, the printing roller and the ink pool are installed on the rack, and one fourth of the printing roller is immersed in the ink pool; a mounting plate is fixedly mounted on the side, close to the printing roller, of the control table, a clamp is fixedly mounted on the mounting plate, a doctor blade is mounted in the clamp, and the control table is used for controlling radial movement and angle control of the mounting plate. The splitter plate is an arc-shaped plate, and the thickness of the splitter plate is gradually reduced in the direction close to the printing roller. The ink is shunted through the shunting plate, so that the quality and the speed when the ink impacts the doctor blade are reduced, the impact force on the doctor blade is reduced, and the problem that the doctor blade is excessively impacted by the ink is solved.

Description

Technical Field

[0001] This invention relates to the field of plastic tote bag processing technology, specifically to a plastic tote bag processing and molding system. Background Technology

[0002] Plastic shopping bags are very common in daily life. During the molding process, most plastic shopping bags need to have a pattern printed on the surface for aesthetic or promotional purposes. Compared to the load-bearing capacity of the plastic bag, many manufacturers pay more attention to the quality of the printing.

[0003] Gravure printing is commonly used for printing on plastic tote bags. A printing roller is used to print the desired pattern onto the surface of the bag. During printing, one-quarter of the printing roller is immersed in an ink bath with a certain viscosity. The roller surface is divided into recessed pattern areas and blank areas. As the roller rotates, some ink is carried away from its surface. A doctor blade is then used to scrape away the ink from the blank areas. Because the doctor blades are relatively thin (0.2mm), and the angle and pressure applied to the roller surface are strictly regulated, the initial angle of the doctor blade is generally between 55° and 65°, and the force applied by the cylinder is around 10KN to 25KN. However, when the roller rotates at a high speed, the ink continuously impacts the doctor blade at high speed, causing changes in the doctor blade's angle and consequently, changes in the pressure exerted by the doctor blade on the roller.

[0004] Because different types of ink have different viscosities, the impact force on the doctor blade varies at different printing speeds. Therefore, to prevent ink from impacting the doctor blade and causing changes in its angle, manufacturers typically increase the pressure exerted by the doctor blade on the printing roller during printing. However, excessively increasing the pressure can cause the doctor blade to deform due to excessive pressure on the printing roller, reducing its lifespan and easily damaging the printing roller.

[0005] To address this, a plastic tote bag processing and molding system is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a plastic tote bag processing and forming system that reduces the impact of ink carried by the printing roller on the doctor blade. The ink is diverted by a diverter plate, thereby reducing the mass and speed of the ink impacting the doctor blade, and thus reducing the impact force on the doctor blade.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A plastic tote bag processing and forming system includes a frame, within which an printing roller is rotatably mounted, and an ink pool is fixedly mounted below the printing roller, with one-quarter of the printing roller immersed in the ink pool; it also includes a control console, with a control console located on the left side of the ink pool, and a mounting plate fixedly mounted on the control console near the printing roller, with clamps fixedly mounted on the mounting plate, and a doctor blade installed within the clamps; the control console is used to control the radial movement and angle control of the mounting plate; and it also includes limiting devices, with limiting devices fixedly mounted on both sides of the control console, and the frame... The side wall is provided with a sliding groove, and the limiting device cooperates with the sliding groove. The limiting device is used to fix the control console. It also includes a flow divider plate and a return plate. The flow divider plate is installed on the mounting plate. The flow divider plate is an arc-shaped plate and its thickness gradually decreases along the direction close to the printing roller. The strength of the flow divider plate is greater than the strength of the doctor blade. In order to prevent the flow divider plate from deforming due to the impact of ink, a return groove is provided at the end of the flow divider plate close to the printing roller. A return plate is fixedly installed at the end of the flow divider plate away from the printing roller, and the inner wall of the return plate is smoothly connected to the flow divider plate.

[0009] When the printing roller is rotating and in contact with ink, ink not adsorbed by the roller is flung out along the tangent of the intersection of the roller and the ink surface. Therefore, the flow divider is designed as an arc-shaped plate, with one end close to the printing roller and piercing into the ink carried by it. Thus, some ink flows outward along the flow divider, while some is carried away by the roller until it is removed by the doctor blade. Here, the flow divider reduces the impact of ink on the doctor blade. To improve the ink penetration effect, the end of the flow divider near the printing roller is designed as a pointed tip. The other end of the flow divider is used to block ink that is not adsorbed by the roller and splashes after being scraped away by the tip. To prevent deformation of the flow divider due to ink impact, the thickness of the end furthest from the printing roller is greater than that of the pointed tip. To improve the backflow effect after ink contacts the inner wall of the flow divider, the inner wall surface is designed as a smooth arc surface. Therefore, the thickness of the flow divider gradually decreases towards the printing roller. The ink will splash again after passing through the distributor plate. To prevent ink from splashing everywhere, a return plate is fixedly installed at one end of the distributor plate. After the splashed ink comes into contact with the return plate, it will flow back into the ink pool along the smooth inner wall of the return plate. The ink flowing back from the doctor blade meets the ink carried by the printing roller, reducing the speed of the ink on the printing roller surface. A small ink pool is formed between the distributor plate and the printing roller, which slows down the ink carried by the roller again, creating a large speed difference between the ink carried by the roller and the printing roller. This results in less ink being carried by the printing roller to the doctor blade, and the overall speed of the ink when impacting the doctor blade is also reduced, thereby reducing the inertial impact of the ink on the doctor blade. The return groove on the distributor plate discharges the ink to the ink pool below. Thus, the pressure applied by the doctor blade to the printing roller can be kept within a small range, which is the pressure required to scrape the ink clean, effectively reducing the wear of the doctor blade, while ensuring the surface quality of the printing roller.

[0010] Preferably, a mounting base is installed at the bottom of the mounting plate, and the flow divider is fixedly installed on the mounting base. An L-shaped baffle is fixedly installed on the mounting base, and the L-shaped baffle is located between the doctor blade and the flow divider. The L-shaped baffle includes a long plate and a short plate connected to each other, and the long plate is fixedly connected to the mounting base. The point where the printing roller is closest to the flow divider is point C. The extension line of the tangent at point C intersects the long plate, and the extension lines at both ends of the short plate intersect the doctor blade and the flow divider, respectively.

[0011] If the ink flowing back from the doctor blade is not guided, it will spill onto various areas of the return plate or flow outside the equipment. An L-shaped baffle collects the flowing ink and directs it into the ink carried by the printing roller, preventing the ink from spreading and solidifying on the return plate. This also maximizes the offsetting of the ink's potential energy against the kinetic energy carried by the printing roller. Ink in the small ink pool formed between the top of the distributor plate and the printing roller, if carried by the printing roller but not absorbed, will fly towards the mounting plate and clamps. To block and collect this flying ink, the extension of the tangent at point C is intersected with the long plate, ensuring complete blocking and recovery of the flying ink. The short plate guides the ink scraped from the doctor blade to the area between the distributor plate and the printing roller. To improve the backflow effect of the short plate, it needs to be tilted between the doctor blade and the distributor plate. Therefore, the extensions at both ends of the short plate intersect with the doctor blade and the distributor plate, respectively.

[0012] Furthermore, multiple return channels are provided, and adjacent return channels are not connected to each other laterally, and the angle between the return channels and the horizontal plane is 60°.

[0013] Printing ink has a high viscosity, which means that the speed at which ink is discharged by gravity alone cannot keep up with the speed at which ink flows back from the doctor blade. Taking advantage of the high viscosity of the ink, the opening angle of the return tank is set to 60°. When the ink flows down from the return tank, the ink diverted by the flow divider plate carries the ink in the return tank, which speeds up the flow of ink in the return tank and accelerates the return speed of ink on the flow divider plate. This ensures that the small ink pool formed by the ink flowing back from the doctor blade and the ink carried by it remains in a dynamically stable state.

[0014] Furthermore, the intersection of the quarter-position of the printing roller and the horizontal line is designated as D. The intersection of the tangent at point D with the flow divider plate coincides with the fixed position of the mounting base and the flow divider plate. The ink carried by the rotation of the printing roller will fly out along the tangent at point D, and the ink with greater kinetic energy will impact the intersection of the tangent at point D and the flow divider plate. To prevent the connection point between the flow divider plate and the mounting base from loosening after the impact, the intersection of the tangent at point D and the flow divider plate is set to coincide with the fixed position of the mounting base and the flow divider plate. A wear-resistant layer is provided at the intersection of the tangent at point D and the flow divider plate to prevent the splashed ink from abrading the intersection of the tangent at point D and the flow divider plate, thus preventing the inner wall of the flow divider plate from becoming rough.

[0015] Furthermore, the surfaces of both the flow divider and the return plate are coated with a fluorosilicone resin layer; the fluorosilicone resin has good anti-stick properties, which allows the ink to flow better on the flow divider and the return plate, improving the return and flow separation effects.

[0016] Furthermore, a filter plate is rotatably mounted on the inner side wall of the bottom end of the return plate, and telescopic rods are fixedly mounted on both side walls of the return plate. The two ends of the filter plate are respectively connected to the output ends of the two telescopic rods, and the vertical projection line of the intersection of the tangent at point D and the diverter plate is located on the filter plate.

[0017] During the printing process, because part of the printing roller is immersed in the ink pool, the ink on the side wall of the printing roller sometimes clumps and is thrown into the ink pool by the printing roller, or is twisted off by the ink when the printing roller passes through the ink pool. In addition, air impurities in the air may also fall into the ink pool. These impurities or clumps are often located in the middle and outer layers of the ink layer after being picked up by the printing roller. When the ink picked up passes through the diverter plate, the middle and outer layers of the ink are diverted to the filter plate, so that the impurities and clumps are left on the filter plate, avoiding the "blade streaks" caused by ink clumps or impurities impacting the doctor blade. In order to allow the ink to pass through the filter plate as much as possible after impacting the diverter plate, the vertical projection line of the intersection of the tangent of point D and the diverter plate is located on the filter plate.

[0018] Furthermore, a support plate is fixedly installed on the top wall of the long plate. The support plate is attached to the long plate, and the bottom end of the support plate is fixedly connected to the top wall of the diverter plate. The part where the bottom end of the support plate connects to the diverter plate is an arc surface, and the height from the top of the arc surface to the bottom of the diverter plate gradually decreases.

[0019] To prevent the long plate from deforming due to ink impact, a support plate is fixedly installed on the top wall of the long plate to support the back of the long plate. To prevent ink from accumulating at the connection between the long plate and the distributor plate after backflow, the part where the bottom of the support plate connects to the distributor plate is set as an arc surface, and the height from the top of the arc surface to the bottom of the distributor plate gradually decreases, so that the backflowing ink can flow back along the arc surface to the space between the distributor plate and the printing roller.

[0020] Furthermore, a slider is fixedly installed on the top of the mounting base, and a groove that cooperates with the slider is opened on the bottom of the mounting plate. Electric push rods are fixedly installed on both sides of the bottom wall of the mounting plate, and the output end of the electric push rods is connected to the mounting base. Feed switches are fixedly installed on both sides of the top wall of the mounting plate, and the line connecting the electric push rod and the mounting base is perpendicular to the tangent at point D.

[0021] The feed switch is electrically connected to the electric actuator. The electric actuator is used to adjust the flow rate of the ink being carried by the splitter plate, and to reasonably distribute the amount of ink being split and the amount of ink returning from the doctor blade. In order to prevent the impact force of the ink impacting the splitter plate and the mounting base from being transmitted to the electric actuator and damaging it, the line connecting the electric actuator and the mounting base is set to be perpendicular to the tangent at point D, so that the impact force is perpendicular to the movement direction of the electric actuator, thereby minimizing the damage to the electric actuator.

[0022] Furthermore, both ends of the mounting base are equipped with a fixing rod and a mounting rod, which are fixedly and rotatably connected to the mounting base, respectively. One end of the fixing rod is fixedly mounted with a fixing box, and one end of the mounting rod is rotatably connected to the fixing box. A mounting block is fixedly mounted on the mounting rod, and the splitter plate is fixed on the mounting block. A turbine is fixedly mounted on the end of the mounting rod located inside the fixing box. A worm gear that cooperates with the turbine is rotatably mounted inside the fixing box, and one end of the worm gear extends outside the turbine housing. A turntable is fixedly mounted on the end of the worm gear located outside the fixing box.

[0023] The combination of a turntable, a worm gear, and a worm wheel allows the distributor plate to rotate within a certain angle. In conjunction with an electric push rod, the distributor plate can control the amount of ink carried by the printing roller and the angle of return flow. To prevent the installation angle of the distributor plate from changing due to ink impact, a worm gear with a self-locking function is used to control the rotation of the distributor plate.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. The plastic tote bag processing system of the present invention utilizes a diverter plate to divert a portion of the ink carried by the printing roller, reducing the mass of the ink impacting the doctor blade, thereby reducing the impact force on the doctor blade. Furthermore, the ink flowing back from the doctor blade impacts the ink carried by the roller, reducing the speed of the ink carried by the roller. Moreover, the speed difference between the ink and the printing roller further reduces the mass of the ink when it reaches the doctor blade, further reducing the impact force of the ink on the doctor blade and the pressure of the doctor blade on the printing roller. This effectively reduces the wear of the doctor blade and ensures the surface quality of the printing roller.

[0026] 2. The plastic tote bag processing system of the present invention designs the diverter plate as adjustable. By using the cooperation of turbine and worm gear, the diverter plate can rotate within a certain angle. By cooperating with the electric push rod, the diverter plate can control the amount of ink carried by the printing roller and the return angle, so as to ensure that even if the pressure of the doctor blade on the printing roller is small, the impact force it receives is always within the tolerance range.

[0027] 3. The plastic tote bag processing system of the present invention has a filter plate on the side wall of the return plate to filter out the clumps and impurities in the ink pool and leave them on the filter plate, thereby avoiding the "blade streaks" caused by ink clumps or impurities impacting the doctor blade. The filter plate can open and close at a certain angle through the telescopic rod to accommodate inks of different viscosities and printing rollers of different speeds. Attached Figure Description

[0028] Figure 1 This is an overall structural diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the overall structure after the frame has been removed.

[0030] Figure 3 for Figure 2 Enlarged view of the structure of part A in the middle;

[0031] Figure 4 This is a side view after the rack has been removed.

[0032] Figure 5 for Figure 4 Enlarged view of the structure of section B;

[0033] Figure 6 This is a schematic diagram of the worm gear section.

[0034] In the diagram: 1. Frame; 2. Limiting device; 3. Control console; 4. Printing roller; 5. Ink tank; 6. Mounting plate; 601. Mounting base; 602. Slider; 603. Slide groove; 7. Clamp; 8. Doctor blade; 9. Diverter plate; 901. Return groove; 10. Return plate; 11. L-shaped baffle; 1101. Long plate; 11011. Support plate; 1102. Short plate; 12. Filter plate; 13. Telescopic rod; 14. Electric push rod; 15. Feed switch; 16. Fixing rod; 17. Mounting rod; 18. Fixing box; 19. Mounting block; 20. Turbine; 21. Worm gear; 22. Turntable. Detailed Implementation

[0035] Please see Figures 1 to 6 This invention provides a plastic tote bag processing and molding system, the technical solution of which is as follows:

[0036] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A plastic tote bag processing and forming system includes a frame 1, with an ink roller 4 rotatably mounted inside the frame 1. An ink pool 5 is fixedly mounted below the ink roller 4, with one-quarter of the ink roller 4 immersed in the ink pool 5. It also includes a control console 3, located on the left side of the ink pool 5. A mounting plate 6 is fixedly mounted on the side of the control console 3 near the ink roller 4, and a clamp 7 is fixedly mounted on the mounting plate 6. A doctor blade 8 is installed inside the clamp 7. The control console 3 is used to control the radial movement and angle control of the mounting plate 6. It also includes limiting devices 2, fixedly mounted on both sides of the control console 3. A sliding groove is formed on the side wall of the frame 1, and the limiting devices 2 cooperate with the sliding groove to fix the control console 3. Furthermore, it includes a diverter plate 9 and a return plate 10. The diverter plate 9 is mounted on the mounting plate 6. The diverter plate 9 is an arc-shaped plate with its thickness gradually decreasing towards the ink roller 4. The strength of the diverter plate 9 is greater than the strength of the doctor blade 8. To prevent the diverter plate 9 from deforming due to the impact of ink, the ink roller 4... When in contact with ink during rotation, ink not adsorbed by the printing roller 4 will be flung out along the tangent of the intersection of the printing roller 4 and the ink surface. Therefore, the flow divider 9 is set as an arc-shaped plate, with one end close to the printing roller 4 and piercing into the ink carried by the printing roller 4. Thus, some ink flows outward along the flow divider 9, and some ink is carried away by the printing roller 4 until it is removed by the doctor blade 8. Here, the flow divider 9 reduces the mass of ink impacting the doctor blade 8. In order to improve the effect of the flow divider 9 piercing the ink, the end of the flow divider 9 close to the printing roller 4 is set as a pointed tip. The other end of the flow divider 9 is used to block the ink that is not adsorbed by the printing roller 4 and splashed after being scraped by the tip of the flow divider 9. In order to avoid the flow divider 9 deforming due to the impact of ink, the thickness of the end of the flow divider 9 away from the printing roller 4 is set to be greater than that of the pointed tip. In order to improve the effect of ink backflow after contact with the inner wall of the flow divider 9, the inner wall surface of the flow divider 9 is set as a smooth arc surface. Therefore, the thickness of the flow divider 9 gradually decreases along the direction close to the printing roller 4.

[0037] Reference Figure 5 The flow divider plate 9 has a return groove 901 at one end near the printing roller 4. There are multiple return grooves 901, and the two adjacent return grooves 901 are not connected to each other laterally. The angle between the return groove 901 and the horizontal plane is 60°. The printing ink has a high viscosity, which means that the speed of ink discharge by gravity alone cannot keep up with the speed of ink returning from the doctor blade 8. Taking advantage of the high viscosity of the ink, the opening angle of the return groove 901 is set to 60°. When the ink flows down from the return groove 901, the ink diverted by the flow divider plate 9 drives the ink in the return groove 901, which speeds up the flow of ink in the return groove 901 and accelerates the return speed of the ink on the flow divider plate 9. This ensures that the small ink pool 5 formed by the ink returning from the doctor blade 8 and the ink carried by it remains in a dynamic and stable state.

[0038] Reference Figure 4 A return plate 10 is fixedly installed at the end of the flow divider 9 away from the printing roller 4, and the inner wall of the return plate 10 is smoothly connected to the flow divider 9. After the ink impacts the flow divider 9, it will splash again. To avoid ink splashing everywhere, a return plate 10 is fixedly installed at one end of the flow divider 9. After the splashed ink comes into contact with the return plate 10, it will flow back along the smooth inner wall of the return plate 10 into the ink pool 5. The ink flowing back from the doctor blade 8 meets the ink carried by the printing roller 4, reducing the speed of the ink on the surface of the printing roller 4, and forming a small ink pool 5 between the flow divider 9 and the printing roller 4. The deceleration of the ink creates a significant speed difference between the ink and the printing roller 4, resulting in less ink being carried to the doctor blade 8. Furthermore, the overall speed of the ink impacting the doctor blade 8 is reduced, thus minimizing the inertial impact. The ink is then discharged to the ink pool 5 below via the return channel 901 on the diverter plate 9. This ensures that the pressure applied by the doctor blade 8 to the printing roller 4 remains within a small range—the pressure required to completely remove the ink—effectively reducing wear on the doctor blade 8 while maintaining the surface quality of the printing roller 4.

[0039] Both the flow divider plate 9 and the recirculation plate 10 are made of corrosion-resistant and high-strength stainless steel, and their surfaces are coated with a fluorosilicone resin layer. The fluorosilicone resin has good anti-stick properties, which allows the ink to flow better on the flow divider plate 9 and the recirculation plate 10, thereby improving the recirculation and flow distribution effects.

[0040] Reference Figure 4A mounting base 601 is installed at the bottom of the mounting plate 6, and a flow divider 9 is fixedly installed on the mounting base 601. An L-shaped baffle 11 is fixedly installed on the mounting base 601, and the L-shaped baffle 11 is located between the doctor blade 8 and the flow divider 9. The L-shaped baffle 11 includes a long plate 1101 and a short plate 1102 connected to each other. The long plate 1101 is fixedly connected to the mounting base 601. The point where the printing roller 4 is closest to the flow divider 9 is point C. The extension of the tangent at point C intersects the long plate 1101, and the extensions at both ends of the short plate 1102 intersect the doctor blade 8 and the flow divider 9, respectively. If the ink flowing back from the doctor blade 8 is not guided, it will spill onto various areas of the return plate 10 or flow to the outside of the equipment. The L-shaped baffle 11 collects the flowing ink and guides it into the ink carried by the printing roller 4, preventing the ink from getting stuck on the return plate 10. The ink disperses and solidifies on the surface, and can maximize the offsetting of the potential energy of the ink carried by the printing roller 4. The ink in the small ink pool 5 formed between the top of the diverter plate 9 and the printing roller 4 is carried by the printing roller 4 and will fly towards the mounting plate 6 and the clamp 7 after it is not absorbed by the printing roller 4. In order to block and collect the flying ink, the extension line of the tangent at point C is set to intersect with the long plate 1101, so that the flying ink can be completely blocked and recovered by the long plate 1101. The short plate 1102 is used to guide the ink scraped from the doctor blade 8 to the space between the diverter plate 9 and the printing roller 4. In order to improve the backflow effect of the short plate 1102, the short plate 1102 needs to be set at an angle between the doctor blade 8 and the diverter plate 9. Therefore, the extension lines at both ends of the short plate 1102 are set to intersect with the doctor blade 8 and the diverter plate 9 respectively.

[0041] A support plate 11011 is fixedly installed on the top wall of the long plate 1101. The support plate 11011 is in contact with the long plate 1101, and the bottom end of the support plate 11011 is fixedly connected to the top wall of the flow divider plate 9. The part where the bottom end of the support plate 11011 connects to the flow divider plate 9 is an arc surface, and the height from the top of the arc surface to the bottom of the flow divider plate 9 gradually decreases. In order to prevent the long plate 1101 from deforming after the ink impacts the long plate 1101, the support plate 11011 is fixedly installed on the top wall of the long plate 1101 to support the back of the long plate 1101. In order to prevent the ink from accumulating at the connection between the long plate 1101 and the flow divider plate 9 after backflow, the part where the bottom end of the support plate 11011 connects to the flow divider plate 9 is set to be an arc surface, and the height from the top of the arc surface to the bottom of the flow divider plate 9 gradually decreases, so that the backflowing ink can flow back along the arc surface to the space between the flow divider plate 9 and the printing roller 4.

[0042] The intersection of the quarter position of the printing roller 4 and the horizontal line is point D. The intersection of the tangent of point D and the flow divider plate 9 coincides with the fixed position of the mounting base 601 and the flow divider plate 9. The ink carried by the rotation of the printing roller 4 will fly out along the tangent of point D, and the ink with greater kinetic energy will hit the intersection of the tangent of point D and the flow divider plate 9. In order to prevent the connection point between the flow divider plate 9 and the mounting base 601 from loosening after the impact, the intersection of the tangent of point D and the flow divider plate 9 is set to coincide with the fixed position of the mounting base 601 and the flow divider plate 9. A wear-resistant layer is provided at the intersection of the tangent of point D and the flow divider plate 9 to prevent the splashed ink from abrading the intersection of the tangent of point D and the flow divider plate 9, thus preventing the inner wall of the flow divider plate 9 from becoming rough.

[0043] Reference Figure 4 and Figure 6 A slider 602 is fixedly mounted on the top of the mounting base 601. A groove 603, which mates with the slider 602, is provided on the bottom of the mounting plate 6. Electric push rods 14 are fixedly mounted on both sides of the bottom wall of the mounting plate 6, and the output ends of the electric push rods 14 are connected to the mounting base 601. Feed switches 15 are fixedly mounted on both sides of the top wall of the mounting plate 6. The line connecting the electric push rods 14 and the mounting base 601 is perpendicular to the tangent at point D. A fixing rod 16 and a mounting rod 17 are mounted at both ends of the mounting base 601. Rods 17 are fixedly and rotatably connected to mounting bases 601. One end of the fixed rod 16 is fixedly mounted to a mounting box 18, and one end of the mounting rod 17 is rotatably connected to the mounting box 18. A mounting block 19 is fixedly mounted on the mounting rod 17, and the splitter plate 9 is fixed to the mounting block 19. A turbine 20 is fixedly mounted on one end of the mounting rod 17 inside the mounting box 18. A worm gear 21 that cooperates with the turbine 20 is rotatably mounted inside the mounting box 18, and one end of the worm gear 21 extends outside the turbine 20 housing. A turntable 22 is fixedly installed at one end outside the fixed box 18; the feed switch 15 is electrically connected to the electric push rod 14, and the electric push rod 14 is used to adjust the flow rate of the ink carried by the diverter plate 9, so as to reasonably distribute the amount of ink diverted and the amount of ink returning from the doctor blade 8; in order to prevent the impact force of the ink from impacting the diverter plate 9 and the mounting base 601 and transmitting the impact force to the electric push rod 14 and damaging the electric push rod 14, the line connecting the electric push rod 14 and the mounting base 601 is set to be perpendicular to the tangent at point D, so that the impact force is perpendicular to the tangent at point D. The electric push rod 14 moves vertically to minimize damage to it. The turntable 22, turbine 20, and worm gear 21 work together to allow the flow divider 9 to rotate within a certain angle. Combined with the electric push rod 14, the flow divider 9 can control the amount of ink carried by the printing roller 4 and the return angle. To prevent the installation angle of the flow divider 9 from changing after the ink impacts it, the turbine 20 and worm gear 21 with self-locking function are used to control the rotation of the flow divider 9.

[0044] Reference Figure 3 and Figure 4A filter plate 12 is rotatably mounted on the inner side wall of the bottom end of the return plate 10. Telescopic rods 13 are fixedly mounted on both side walls of the return plate 10, and the two ends of the filter plate 12 are respectively connected to the output ends of the two telescopic rods 13. The vertical projection line of the intersection of the tangent at point D and the diverter plate 9 is located on the filter plate 12. During the printing process, since part of the printing roller 4 is immersed in the ink pool 5, the ink on the side wall of the printing roller 4 sometimes clumps up and is thrown into the ink pool 5 by the printing roller 4, or is twisted off by the ink when the printing roller 4 rotates through the ink pool 5. Moreover, the air... Impurities may also fall into the ink pool 5. These impurities or clumps are often located on the middle and outer edges of the ink layer after being carried up by the printing roller 4. When the ink is carried up by the diverter plate 9, the middle and outer layers of the ink are diverted to the filter plate 12, so that the impurities and clumps are left on the filter plate 12, avoiding the "blade filaments" caused by ink clumps or impurities impacting the doctor blade 8. In order to allow the ink to pass through the filter plate 12 as much as possible after impacting the diverter plate 9, the vertical projection line of the intersection of the tangent of point D and the diverter plate 9 is set on the filter plate 12, so as to fully filter the ink.

[0045] Before production, the electric push rod 14 is retracted to the initial position, the printing roller 4 is started, and the control console 3 presses the doctor blade 8 on the printing roller 4, so that the pressure of the doctor blade 8 on the printing roller 4 is maintained between 200 kPa and 300 kPa, and the angle between the doctor blade 8 and the horizontal line is maintained at 60°. The control console 3 is fixed by the limiting device 2.

[0046] During production, one hand controls the feed switch 15 to adjust the feed amount of the electric push rod 14, while the other hand rotates the turntable 22 to adjust the angle of the diverter plate 9. The diverter plate 9 is then inserted into the ink carried by the printing roller 4. Under normal production conditions, the ink thickness carried by the printing roller 4 after rotation is 10mm. The tip of the diverter plate 9 is inserted 5mm into the ink, at which point half of the ink carried by the printing roller 4 is diverted and flows along the return plate 10 into the ink pool 5. The other half of the ink is impacted by the doctor blade 8, forming a backflow. The flowing ink falls onto the L-shaped baffle 11 and is guided into the diverted ink. The rising ink meets the falling ink, reducing the speed of the ink on the surface of the printing roller 4 and forming a small ink pool 5 between the diverting plate 9 and the printing roller 4. Here, the speed of the diverted ink is slowed down again, creating a large speed difference between the ink being carried up and the printing roller 4. This further reduces the quality of the ink carried by the printing roller 4 to the doctor blade 8, while the impurities and ink clumps in the ink pool 5 are left on the filter plate 12 after diversion.

[0047] All other things being equal, setting the diverter plate 9 can divert at least 50% of the ink that is carried up. Under the impact of the returning ink, the quality and speed of the ink reaching the doctor blade 8 will be reduced by more than 50%. If the tip of the diverter plate 9 is inserted into the ink-carrying part by 8mm, 80% of the ink will be diverted. The 20% return flow is not enough to effectively slow down the ink that continues to rise, nor can it form a small ink pool 5 between the diverter plate 9 and the printing roller 4 to further reduce the rising ink speed. Moreover, when there is less ink layer on the surface of the printing roller 4, it will carry some of the returning ink to the doctor blade 8. Therefore, the diverter plate 9 should ideally control the ink diversion flow of the printing roller 4 to 50% to 60%.

Claims

1. A plastic tote bag processing and forming system, comprising a frame (1), a limiting device (2), a control console (3), an ink roller (4), and an ink pool (5), wherein the limiting device (2), the control console (3), the ink roller (4), and the ink pool (5) are mounted on the frame (1), and one-quarter of the ink roller (4) is immersed in the ink pool (5); a mounting plate (6) is fixedly mounted on the side of the control console (3) near the ink roller (4); a clamp (7) is fixedly mounted on the mounting plate (6), and a doctor blade (8) is installed in the clamp (7); the control console (3) is used to control the radial movement and angle control of the mounting plate (6), characterized in that, It also includes a flow divider plate (9) and a return plate (10). The flow divider plate (9) is installed on the mounting plate (6). The flow divider plate (9) is an arc-shaped plate, and its thickness gradually decreases along the direction close to the printing roller (4). The strength of the flow divider plate (9) is greater than the strength of the doctor blade (8). The end of the flow divider plate (9) close to the printing roller (4) is provided with a return groove (901). The end of the flow divider plate (9) away from the printing roller (4) is fixedly installed with a return plate (10), and the inner wall of the return plate (10) is smoothly connected to the flow divider plate (9).

2. The plastic tote bag processing and molding system according to claim 1, characterized in that: The mounting plate (6) has a mounting base (601) at its bottom, and the flow divider (9) is fixedly mounted on the mounting base (601). An L-shaped baffle (11) is fixedly mounted on the mounting base (601), and the L-shaped baffle (11) is located between the doctor blade (8) and the flow divider (9). The L-shaped baffle (11) includes a long plate (1101) and a short plate (1102) that are connected to each other. The long plate (1101) is fixedly connected to the mounting base (601). The point where the printing roller (4) is closest to the flow divider (9) is point C. The extension of the tangent at point C intersects the long plate (1101), and the extensions at both ends of the short plate (1102) intersect the doctor blade (8) and the flow divider (9) respectively.

3. The plastic tote bag processing and molding system according to claim 2, characterized in that: The reflux trough (901) is provided in multiple ways. The two adjacent reflux troughs (901) are not connected to each other in the lateral direction, and the angle between the reflux trough (901) and the horizontal plane is 60°.

4. The plastic tote bag processing and molding system according to claim 2, characterized in that: The intersection of the quarter position of the printing roller (4) and the horizontal line is D. The intersection of the tangent of point D and the flow divider (9) coincides with the fixed position of the mounting base (601) and the flow divider (9). A wear-resistant layer is provided at the intersection of the tangent of point D and the flow divider (9).

5. The plastic tote bag processing and molding system according to claim 4, characterized in that: A filter plate (12) is rotatably installed on the inner side wall of the bottom end of the return plate (10). Telescopic rods (13) are fixedly installed on both sides of the return plate (10), and the two ends of the filter plate (12) are respectively connected to the output ends of the two telescopic rods (13). The vertical projection line of the intersection of the tangent at point D and the diverter plate (9) is located on the filter plate (12).

6. The plastic tote bag processing and molding system according to claim 2, characterized in that: A support plate (11011) is fixedly installed on the top wall of the long plate (1101). The support plate (11011) is in contact with the long plate (1101), and the bottom end of the support plate (11011) is fixedly connected to the top wall of the diverter plate (9). The part where the bottom end of the support plate (11011) is connected to the diverter plate (9) is an arc surface, and the height from the top of the arc surface to the bottom of the diverter plate (9) gradually decreases.

7. A plastic tote bag processing and molding system according to claim 4, characterized in that: A slider (602) is fixedly installed on the top of the mounting base (601). A groove (603) that cooperates with the slider (602) is opened on the bottom of the mounting plate (6). An electric push rod (14) is fixedly installed on both sides of the bottom wall of the mounting plate (6), and the output end of the electric push rod (14) is connected to the mounting base (601). A feed switch (15) is fixedly installed on both sides of the top wall of the mounting plate (6). The line connecting the electric push rod (14) and the mounting base (601) is perpendicular to the tangent at point D.

8. A plastic tote bag processing and molding system according to claim 7, characterized in that: The mounting base (601) has a fixing rod (16) and a mounting rod (17) installed at both ends. The fixing rod (16) and the mounting rod (17) are fixedly and rotatably connected to the mounting base (601), respectively. A fixing box (18) is fixedly installed at one end of the fixing rod (16), and a rotatably connected to the fixing box (18) at one end of the mounting rod (17). A mounting block (19) is fixedly installed on the mounting rod (17), and a flow divider (9) is fixed on the mounting block (19). A turbine (20) is fixedly installed at one end of the mounting rod (17) inside the fixing box (18). A worm gear (21) that cooperates with the turbine (20) is rotatably installed inside the fixing box (18), and one end of the worm gear (21) extends to the outside of the turbine (20) box. A turntable (22) is fixedly installed at the other end of the worm gear (21) outside the fixing box (18).

Images