An air suction platform and an inkjet printing device using the same

Abstract

The present invention discloses a suction platform, which relates to the technical field of printing equipment. The suction platform includes a fixed platform and a plurality of conveyor belts arranged at intervals. The bottom surface of each conveyor belt is slidably matched with the top surface of the fixed platform. The outer wall of each conveyor belt is evenly provided with axial teeth. A first negative pressure chamber is arranged in the fixed platform. A plurality of suction openings are arranged on the first negative pressure chamber corresponding to each conveyor belt. The axis of the suction opening is horizontal and located at the side of the first negative pressure chamber, and the suction opening is attached to one side of the corresponding conveyor belt. The gap between any two adjacent teeth on the conveyor belt can communicate with any one of the suction openings corresponding to the conveyor belt. The inkjet printing equipment using the above suction platform further includes a driving mechanism, a feeding module, a paging module and a material flattening module. The suction platform of the present invention and the inkjet printing equipment using the same solve the problems of nozzle damage caused by warping of materials due to insufficient and uneven suction, and avoid the adverse printing phenomena such as ink flying and ink leakage caused by direct suction nozzles.

Description

Technical Field

[0001] The present invention relates to the technical field of printing devices, and particularly to an air suction platform and an inkjet printing device using the same. Background Art

[0002] Under the premise of economic globalization, the circulation of goods is becoming more and more convenient, and the requirements for personalized commodity packaging are getting higher and higher. As a printing method with low cost and good convenience, inkjet printing is becoming more and more popular in the personalized printing and packaging market. The nozzle installation height of the inkjet printing method is only 1 mm - 3 mm from the printing material. If a single piece of material is deformed or the suction force of the air suction platform is insufficient, the material will warp, which is likely to scratch the nozzle.

[0003] At present, traditional air suction platforms on the market all adopt a design scheme of punching holes in the belt and designing a negative pressure chamber below the belt. When there is no printing material on the belt, the holes on the belt suck air in vain. The nozzle of the inkjet printing device is located above the belt with suction holes, and after the nozzle holes are directly sucked by the suction holes, ink leakage is likely to occur. Secondly, when the edge of the printing material is below the nozzle, the air suction affects the ink droplets at the edge part, which is likely to cause poor conditions such as flying ink and rough edges, affecting the printing quality.

[0004] In addition, according to the positions of the holes punched in the belt, corresponding holes need to be designed on the negative pressure chamber. If the position of the belt shifts, the holes on the negative pressure chamber will be blocked, resulting in no negative pressure at the blocked hole position, causing the material to deform. When the deformed material passes through the nozzle of the inkjet printing device, due to uneven suction force, there is a risk of scratching the nozzle. At the same time, the traditional air suction platform turns on and off the air suction at the same speed, which will affect the running speed of the belt and easily lead to unstable printing conditions. Summary of the Invention

[0005] The purpose of the present invention is to provide an air suction platform and an inkjet printing device using the same to solve the problems existing in the above-mentioned prior art and improve the stability of air suction of the air suction platform.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] The present invention provides an air suction platform, including a fixed platform and a plurality of conveyor belts arranged at intervals. The bottom surface of each conveyor belt is slidably matched with the top surface of the fixed platform. Axial teeth are uniformly arranged on the outer wall of each conveyor belt. A first negative pressure chamber is arranged in the fixed platform. A plurality of air suction ports are arranged on the first negative pressure chamber corresponding to each conveyor belt. The axis of the air suction port is horizontal and the air suction port is located at the side of the first negative pressure chamber, and the air suction port is attached to one side of the corresponding conveyor belt. The gap between any two adjacent teeth on the conveyor belt can communicate with any one of the air suction ports corresponding to the conveyor belt.

[0008] Preferably, the first negative pressure chamber includes a plurality of sub-negative pressure chambers, and the sub-negative pressure chambers correspond to the conveyor belts one by one.

[0009] Preferably, each sub-negative pressure chamber includes a cavity and a cover. The top of the cavity is open, and the cover is sealingly arranged at the top of the cavity. The cover is located on the top surface of the fixed platform. Any one of the sub-negative pressure chambers includes a plurality of air suction openings spaced apart and disposed below the cover, and the air suction openings are located on the side wall of the sub-negative pressure chamber.

[0010] Preferably, the bottom end of the air suction opening is flush with the bottom end of the tooth on the conveyor belt directly above the fixed platform, and the top surface of the cover is lower than the top end of the part of the conveyor belt directly above the fixed platform.

[0011] Preferably, the top surface of the cover is 0.22 mm lower than the top end of the part of the conveyor belt directly above the fixed platform.

[0012] Preferably, the air suction platform of the present invention further includes a total negative pressure chamber. The total negative pressure chamber is communicated with a negative pressure device. Each sub-negative pressure chamber is connected with a ventilation pipe. The end of the ventilation pipe far away from the sub-negative pressure chamber is communicated with the total negative pressure chamber, and a valve is arranged on each ventilation pipe.

[0013] Preferably, a cylinder is arranged on the total negative pressure chamber corresponding to each valve, and the cylinder can open and close the corresponding valve.

[0014] The present invention also provides an inkjet printing device using the above air suction platform, which further includes a driving mechanism, a feeding module, a page separation module and a material flattening module;

[0015] The driving mechanism is used to drive all the conveyor belts to rotate synchronously;

[0016] The feeding module is used to place and fix the stacked materials for printing; the feeding module includes a paper placing table and an adjusting baffle. The adjusting baffle is slidably matched with the paper placing table in the front and back directions. A conveying wheel for conveying the stacked materials is arranged on the paper placing table.

[0017] The page separation module includes two page separation baffles, two page separation limiting baffles, two guide rods and two lead screws. Each page separation baffle is fixedly connected with each guide rod. Each page separation limiting baffle is slidably matched with each guide rod. One page separation limiting baffle is threadedly connected with one lead screw, and the other page separation limiting baffle is threadedly connected with the other lead screw;

[0018] The material flattening module includes a flattening roller shaft arranged above the feeding end of the air suction platform.

[0019] Preferably, the driving mechanism includes a driving motor, a first tension roller shaft, a second tension roller shaft, a traction roller shaft, an adjusting roller shaft, and a transition roller shaft that are respectively rotatably engaged with the frame of the printing device. Any one of the conveyor belts is wound around the first tension roller shaft, the second tension roller shaft, the traction roller shaft, the adjusting roller shaft, and the transition roller shaft; a driving gear is provided on the traction roller shaft corresponding to each conveyor belt, and the driving gear meshes with some of the teeth on the corresponding conveyor belt; a limiting wheel is provided on the adjusting roller shaft corresponding to each conveyor belt, a limiting groove is provided on the limiting wheel, the conveyor belt is wound in the limiting groove on the corresponding limiting wheel, and the width of the limiting groove is equal to the width of the corresponding conveyor belt.

[0020] Preferably, it further includes an air suction controller, and each cylinder is connected to a solenoid valve. All the solenoid valves are in signal connection with the air suction controller, and the opening and closing of the corresponding cylinder can be controlled through the solenoid valve.

[0021] The present invention has achieved the following technical effects compared with the prior art:

[0022] The air suction platform of the present invention and the inkjet printing device using the same improve the stability of air suction of the air suction platform; the air suction platform of the present invention effectively ensures the suction force and flatness of the material. The side air suction structure disperses the suction force when there is no material, solves the influence of excessive air suction on the stability of the ink path of the inkjet device, solves the problem that the material cannot be sucked flat due to too small air suction, prevents the flat belt from running off and the uneven suction force with or without material; effectively solves the influence of air suction on the inkjet quality during the inkjet printing process, solves the problem of ink flying and scattering around the inkjet printing effect, and ensures the consistency of the inkjet printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic of the air suction platform of the present invention Figure 1 ;

[0025] Figure 2 Structural schematic of the air suction platform of the present invention Figure 2 ;

[0026] Figure 3 is Figure 2 partial enlarged view of;

[0027] Figure 4 Schematic structural diagram of the inkjet printing device of the present invention;

[0028] Wherein: 100, air suction platform; 200, inkjet printing device; 1, fixed platform; 2, conveyor belt; 3, cover body; 4, sub-negative pressure chamber; 5, first tension roller shaft; 6, second tension roller shaft; 7, traction roller shaft; 8, transition roller shaft; 9, adjustment roller shaft; 10, limit wheel; 11, cylinder; 12, air suction port; 13, total negative pressure chamber; 14, paper placing table; 15, fixed beam; 16, rack; 17, adjustment baffle; 18, paging baffle; 19, paging limit baffle; 20, lead screw; 21, guide rod. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] The purpose of the present invention is to provide an air suction platform and an inkjet printing device using the same to solve the problems existing in the above-mentioned prior art and improve the stability of air suction of the air suction platform.

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] As Figures 1 to 3 shown: This embodiment provides an air suction platform 100, which includes a fixed platform 1 and a plurality of conveyor belts 2 arranged at intervals. The bottom surface of each conveyor belt 2 is slidably matched with the top surface of the fixed platform 1, and axial teeth are uniformly arranged on the outer wall of each conveyor belt 2.

[0033] In this embodiment, a plurality of sub-negative pressure chambers 4 are arranged in the fixed platform 1. The sub-negative pressure chambers 4 correspond to the conveyor belts 2 one by one, and the plurality of sub-negative pressure chambers 4 and the plurality of conveyor belts 2 are staggered.

[0034] The sub-negative pressure chamber 4 includes a cavity and a cover body 3. The top end of the cavity is open, the cover body 3 is hermetically arranged at the top end of the cavity, the cover body 3 is located on the top surface of the fixed platform 1. Any one of the sub-negative pressure chambers 4 includes a plurality of air suction ports 12 spaced apart and distributed below the cover body 3. The axis of the air suction port 12 is horizontal, and the air suction port 12 is opened on the side wall of the sub-negative pressure chamber 4. The bottom end of the air suction port 12 is flush with the bottom end of the tooth on the conveyor belt 2 directly above the fixed platform 1, and the top surface of the cover body 3 is 0.22 mm lower than the top end of the part of the conveyor belt 2 directly above the fixed platform 1.

[0035] In this embodiment, the air suction port 12 is located at the top of the fixed platform 1, and the air suction port 12 is attached to one side of the conveyor belt 2 corresponding to the sub-negative pressure chamber 4. The gap between any two adjacent teeth on the conveyor belt 2 can communicate with any one of the air suction ports 12 corresponding to the conveyor belt 2.

[0036] In this embodiment, the air suction platform 100 further includes a main negative pressure chamber 13. The main negative pressure chamber 13 is communicated with a negative pressure device. Each sub-negative pressure chamber 4 is connected with a ventilation pipe. One end of all the ventilation pipes far away from the sub-negative pressure chamber 4 is communicated with the main negative pressure chamber 13. A valve is arranged on each ventilation pipe. A cylinder 11 is arranged on the main negative pressure chamber 13 corresponding to each valve, and the cylinder 11 can open and close the corresponding valve.

[0037] The air suction platform 100 of this embodiment abandons the air suction method of arranging a negative pressure chamber under the belt in the prior art, and instead adopts the method of arranging the sub-negative pressure chambers 4 in parallel between the two conveyor belts 2. The conveyor belt 2 that does not need to be punched is used. At the same time, the method of vertical suction into the negative pressure chamber is abandoned, and the negative pressure is changed to be sucked from the side of the sub-negative pressure chamber 4, which avoids the direct suction of the nozzle of the air suction head when there is no material, and prevents printing defects caused by phenomena such as flying ink and burrs. At the same time, because the conveyor belt 2 is stuck between two sub-negative pressure chambers 4, the side of the sub-negative pressure chamber 4 communicates with the side of the conveyor belt 2, and the negative pressure is sucked from the slot on the side of the conveyor belt 2. Even if the conveyor belt 2 runs off, there will be no blockage of the holes and no negative pressure phenomenon will occur. Since the surface of the conveyor belt 2 is full of slots, the negative pressure on the surface of a single slot is dispersed and the suction force is very small. When there is material on the surface of the conveyor belt 2, due to the dense slots, the material can be evenly and effectively sucked. Since the surface of the cover 3 of the sub-negative pressure chamber 4 between the two conveyor belts 2 is designed 0.22 mm lower than the conveyor belt 2, and there is air suction on both sides of the sub-negative pressure chamber 4, an adsorption force will also be generated on the surface of the sub-negative pressure chamber 4, ensuring that the material is stably adsorbed on the platform and preventing the material from deforming and scratching the nozzle. By controlling the opening and closing of the plug of the telescopic cylinder 11 through the solenoid valve, free control of any sub-negative pressure chamber 4 can be realized. In the case of closing one and leaving one open at intervals, the material can still be evenly adsorbed, and at the same time, the number and position of the sub-negative pressure chambers 4 that need to be opened can be freely selected according to the width of the material. In addition, since the nozzle is only 1 mm away from the surface of the material during printing, and the inkjet printing form is to eject extremely small ink droplets onto the surface of the material, the edge of the material often needs to be printed. If there is air suction at the edge of the material, the edge ink dots will be sucked crooked, resulting in unstable edge printing effect. However, the air suction platform 100 of this embodiment can arbitrarily close the sub-negative pressure chamber 4, which can ensure that the air suction is always under the material. By closing the sub-negative pressure chamber 4 located at the edge, the occurrence of edge air suction phenomenon can be effectively prevented.

[0038] Such as Figures 1 to 4As shown, this embodiment also provides an inkjet printing device 200 using the above-mentioned suction platform 100, which also includes a driving mechanism, a feeding module, a paging module and a material flattening module.

[0039] The driving mechanism is used to drive all the conveyor belts 2 to rotate synchronously; in this embodiment, the driving mechanism includes a driving motor and a first tensioning roller 5, a second tensioning roller 6, a traction roller 7, an adjustment roller 9, and a transition roller 8 that are respectively coordinated with the frame of the printing device for rotation. Any conveyor belt 2 is wound around the first tensioning roller 5, the second tensioning roller 6, the traction roller 7, the adjustment roller 9, and the transition roller 8; a driving gear is provided on the traction roller 7 corresponding to each conveyor belt 2, and the driving gear is meshed with part of the teeth on the corresponding conveyor belt 2. The motor drives the traction roller 7 to rotate through the synchronous belt transmission mechanism, and the traction roller 7 drives all the conveyor belts 2 to rotate through the driving gear; a limiting wheel 10 is provided on the adjustment roller 9 corresponding to each conveyor belt 2, and a limiting groove is provided on the limiting wheel 10. The conveyor belt 2 is wound in the limiting groove on the corresponding limiting wheel 10, and the width of the limiting groove is equal to the width of the corresponding conveyor belt 2. The limiting wheel 10 prevents the corresponding conveyor belt 2 from running off; the transition roller 8 prevents the conveyor belt 2 from rubbing against the fixed platform 1.

[0040] The loading module is used to place and fix the printed stacking materials; the loading module includes a paper placing platform 14 and an adjusting baffle 17, the adjusting baffle 17 and the paper placing platform 14 slide forward and backward, and a conveying wheel for conveying the stacking materials is arranged on the paper placing platform 14; a motor is fixedly arranged under the adjusting baffle 17, and a gear is connected to the output shaft of the motor for transmission, and a rack 16 is fixedly arranged on the inner side of the two fixed beams 15 of the paper placing platform 14, and the gear is meshed with the rack 16. When the motor drives the gear to rotate, the gear will move on the rack 16, thereby driving the adjusting baffle 17 to slide relative to the paper placing platform 14, so that the paper placing platform 14 can adapt to the length of the stacking materials.

[0041] The pagination module includes two pagination baffles 18, two pagination limit baffles 19, two guide rods 21 and two lead screws 20. Each pagination baffle 18 is fixedly connected to each guide rod 21. One lead screw 20 passes through one pagination baffle 18, and the other lead screw 20 passes through the other pagination baffle 18, and the lead screw 20 can rotate relative to the pagination baffle 18. Each pagination limit baffle 19 is slidably engaged with each guide rod 21. One pagination limit baffle 19 is threadedly connected to one lead screw 20, and the other pagination limit baffle 19 is threadedly connected to the other lead screw 20. The two lead screws 20 can rotate independently, so as to realize the individual adjustment of different pagination limit baffles 19. The material flattening module includes a flattening roller shaft arranged above the feeding end of the air suction platform 100, and the material entering the air suction platform 100 is flattened by the flattening roller shaft. It should be noted that the height of the flattening roller shaft is adjustable to adapt to different material thicknesses. Specifically, the flattening roller shaft is connected to the frame of the inkjet printing device 200 through a connecting block and an adjusting bolt, and the installation height of the flattening roller shaft can be adjusted by rotating the adjusting bolt.

[0042] The inkjet printing device 200 of this embodiment further includes an air suction controller, and each cylinder 11 is connected with a solenoid valve, and all solenoid valves are signal-connected to the air suction controller, and the opening and closing of the corresponding cylinder 11 can be controlled through the solenoid valve.

[0043] It should be noted that the inkjet printing device 200 of this embodiment obviously also needs to include necessary parts such as an inkjet module and a moisture preservation module. However, since the above-mentioned parts are conventional prior arts in this field, they will not be elaborated in this embodiment.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the term "first" is only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] Specific examples are used in this specification to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. An air suction platform, characterized in that: It includes a fixed platform and multiple conveyor belts arranged at intervals. The bottom surface of each conveyor belt is slidably engaged with the top surface of the fixed platform. The outer wall of each conveyor belt is evenly provided with axial teeth. A first negative pressure chamber is arranged inside the fixed platform. A plurality of air suction openings are arranged on the first negative pressure chamber corresponding to each conveyor belt. The axis of the air suction opening is horizontal and the air suction opening is located at the side of the first negative pressure chamber, and the air suction opening is attached to one side of the corresponding conveyor belt. The gap between any two adjacent teeth on the conveyor belt can communicate with any one of the air suction openings corresponding to the conveyor belt; the first negative pressure chamber includes a plurality of sub-negative pressure chambers, and the sub-negative pressure chambers correspond to the conveyor belts one by one; each sub-negative pressure chamber includes a cavity and a cover body. The top end of the cavity is open, and the cover body is sealed at the top end of the cavity. The cover body is located on the top surface of the fixed platform. Any one of the sub-negative pressure chambers includes a plurality of air suction openings spaced apart and arranged below the cover body, and the air suction openings are located on the side wall of the sub-negative pressure chamber; the bottom end of the air suction opening is flush with the bottom end of the tooth on the conveyor belt located directly above the fixed platform, and the top surface of the cover body is lower than the top end of the part of the conveyor belt located directly above the fixed platform; It further includes a total negative pressure chamber. The total negative pressure chamber is connected to a negative pressure device. Each sub-negative pressure chamber is connected to a ventilation pipe. The end of the ventilation pipe far from the sub-negative pressure chamber is connected to the total negative pressure chamber. A valve is arranged on each ventilation pipe.

2. The air suction platform according to claim 1, characterized in that: The top surface of the cover body is 0.22 mm lower than the top end of the part of the conveyor belt located directly above the fixed platform.

3. The air suction platform according to claim 1, characterized in that: A cylinder is arranged on the total negative pressure chamber corresponding to each valve. The cylinder can open and close the corresponding valve.

4. An inkjet printing device using the air suction platform according to any one of claims 1-3, characterized in that: It further includes a driving mechanism, a feeding module, a paging module and a material flattening module; The driving mechanism is used to drive all the conveyor belts to rotate synchronously; The feeding module is used to place and fix the stacked printing materials; the feeding module includes a paper placing table and an adjusting baffle. The adjusting baffle is slidably engaged with the paper placing table in the front-back direction. A conveying wheel for conveying the stacked materials is arranged on the paper placing table; The paging module includes two paging baffles, two paging limit baffles, two guide rods and two lead screws. Each paging baffle is fixedly connected to each guide rod. Each paging limit baffle is slidably engaged with each guide rod. One paging limit baffle is threadedly connected to one lead screw, and the other paging limit baffle is threadedly connected to the other lead screw; The material flattening module includes a flattening roller shaft arranged above the feeding end of the air suction platform.

5. The inkjet printing device according to claim 4, characterized in that: The driving mechanism includes a driving motor, a first tensioning roller shaft, a second tensioning roller shaft, a traction roller shaft, an adjusting roller shaft, and a transition roller shaft that are respectively rotatably engaged with the frame of the printing device. Any one of the conveyor belts is wound around the first tensioning roller shaft, the second tensioning roller shaft, the traction roller shaft, the adjusting roller shaft, and the transition roller shaft. Active gears are provided on the traction roller shaft corresponding to each conveyor belt, and the active gears are engaged with some of the teeth on the corresponding conveyor belt. Limit wheels are provided on the adjusting roller shaft corresponding to each conveyor belt, limit grooves are provided on the limit wheels, the conveyor belt is wound in the limit grooves on the corresponding limit wheels, and the width of the limit grooves is equal to the width of the corresponding conveyor belt.

6. The inkjet printing device according to claim 4, characterized in that: It further includes an air suction controller, and each cylinder is connected to a solenoid valve. All the solenoid valves are signal-connected to the air suction controller, and the opening and closing of the corresponding cylinders can be controlled through the solenoid valves.

Images