Vertical multi-station arc surface printing device

Abstract

The invention relates to the technical field of UV printing, in particular to a vertical multi-station arc surface printing device which comprises a longitudinally-arranged circular rotating disc, supporting seats capable of rotating are arranged on the outer surface of the rotating disc at equal intervals, and the rotating disc is connected with a driving mechanism to achieve precise intermittent rotation. A discharging position, a feeding position, a plasma corona position, a printing position, a light shielding position and a UV lamp curing position are sequentially arranged outside the rotary disc according to a specific sequence, the discharging position and the feeding position are each provided with an operation table matched with manual or automatic feeding and discharging, all the function positions are provided with corresponding operation parts, the light shielding position is a light isolation vacancy or is provided with a light shielding plate, and the UV lamp curing position is provided with a UV lamp. And the supporting seat can be adaptive to sleeving and positioning of various arc-surface workpieces. The device realizes full-process continuous operation, effectively avoids ink splashing and nozzle blockage, improves the printing quality, adapts to various workpieces and production scenes, and is simplified in structure and high in practicability. The problems that ink is prone to splashing, patterns are distorted, a spray head is prone to being blocked, production efficiency is low, and adaptability and universality are poor in the existing arc surface workpiece printing process can be solved.

Description

Technical Field

[0001] This invention relates to the field of UV printing technology, and more particularly to a vertical multi-station arc surface printing device. It is mainly used for inkjet printing of various workpieces with arc surfaces (such as cups, barrels, cylindrical shells, and arc-shaped covers), achieving high-precision, continuous printing of arc surfaces without blind spots. It is suitable for various production scenarios, including manual and automated loading and unloading, and is applicable to the processing of workpieces made of various materials such as plastic, stainless steel, ceramics, and glass. Background Technology

[0002] Printing equipment for curved surface workpieces is one of the core pieces of equipment in the industry. Currently, existing printing / printing equipment for curved surface workpieces mainly falls into two categories: contact printing devices for specific products such as plastic cups, and UV printing devices for curved surface products. However, both types of equipment have significant technical shortcomings in actual production applications, making it difficult to simultaneously meet the multiple demands of print quality, production efficiency, and equipment practicality. Specific shortcomings are as follows: Firstly, traditional rotary printing equipment mostly adopts a horizontal layout with a single printing station structure. The workpiece is fixed only by slots and limiting rings and has no rotation capability. It can only complete local printing by having the printing plate adhere to the workpiece surface, and cannot achieve comprehensive processing of curved surfaces without dead angles. At the same time, this type of equipment lacks a professional surface pretreatment structure and a dedicated curing structure, relying solely on natural air drying by a fan. This results in poor ink adhesion to the workpiece surface, low curing efficiency, and the printed pattern is prone to peeling and smudging. Furthermore, the contact printing method can easily scratch the workpiece surface, causing product loss and further reducing the production qualification rate. In addition, this type of equipment is mostly a single-station intermittent operation with poor ability to process multiple workpieces in parallel, resulting in low production efficiency. It is only suitable for manual loading and unloading and cannot meet the needs of mass production. Moreover, it can only be adapted to specific types of curved workpieces, resulting in poor versatility.

[0003] Secondly, while existing UV printing devices for curved surfaces improve printing accuracy and solve some printing blind spot problems by using product rotation in conjunction with printing, these devices are mostly modular in design, relying on complex clamping and rotating mechanisms to position and drive the workpiece. The overall structure is cumbersome, manufacturing costs are high, and they are only suitable for fully automated loading and unloading production scenarios, failing to meet the manual operation needs of small and medium-sized enterprises, resulting in poor adaptability. Furthermore, since the printhead remains stationary relative to the frame, printing blind spots still easily exist in the workpiece height direction. Moreover, the lack of pre-curing design during printing, with only a single-sided curing structure after printing, means that the centrifugal force generated by workpiece rotation can easily cause uncured ink to splatter, resulting in blurred and distorted printed patterns. In addition, these devices only use light-blocking plates for partial light shielding, leaving the UV light to scatter and irradiate the printhead, easily causing the ink inside the printhead to dry and clog, reducing the equipment's operational stability and lifespan. They also lack adaptability to different types of curved surface workpieces, making it difficult to meet diverse processing needs.

[0004] In view of the shortcomings of the prior art, the present invention urgently needs to solve the following technical problems: 1. How to solve the problems of ink splashing, pattern distortion and peeling during the printing of curved workpieces, and ink clogging caused by UV light exposure of the printhead, so as to improve printing quality and equipment operation stability; 2. How to optimize the layout and drive structure of the equipment to achieve continuous operation of printing various types of arc-shaped workpieces throughout the entire process, while simplifying the positioning structure and improving the equipment's operational adaptability, versatility, and production efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of the prior art and provide a vertical multi-station arc surface printing device. This device integrates core functions such as plasma corona pretreatment, simultaneous printing and pre-curing, UV final curing, and light isolation protection. It adopts a multi-station closed-loop layout design with a vertical turntable, combined with a self-rotating support base, a vertically movable print head, and a precise intermittent rotation drive structure. This enables continuous operation of the entire process of printing arc surface workpieces, from feeding, pretreatment, printing, pre-curing, light protection, final curing, to unloading. It not only solves the problems of ink splashing, pattern distortion, and print head clogging at the root, but also significantly improves printing quality and equipment stability. Furthermore, it simplifies the positioning and drive structure, improving the equipment's operational adaptability, versatility, and production efficiency. At the same time, it is adaptable to the processing needs of arc surface workpieces of different types, specifications, and materials, making it highly practical.

[0006] The above objectives are achieved through the following technical solutions: A vertical multi-station arc surface printing device includes a longitudinally arranged circular turntable. Six support seats, each capable of stably mounting an arc surface workpiece, are evenly spaced along the circumference of the turntable's outer surface. Each support seat can rotate freely relative to the turntable. The turntable's outer space along the circumference is arranged in a counter-clockwise direction with an equal spacing between an output position, an input position, a plasma corona treatment position, a printing position, a light-shielding position, and a UV lamp curing position. The included angle between adjacent support seats is 60°. The output position is equipped with an output operating table suitable for manual / automatic unloading, and the input position is equipped with an input operating table suitable for manual / automatic loading. The plasma corona treatment position is equipped with… The device includes a plasma corona nozzle facing the arc surface of the workpiece; the printing position is equipped with a printing nozzle, a nozzle translation mechanism perpendicular to the turntable surface, and a pre-curing lamp located below the support base. The printing nozzle is driven by the nozzle translation mechanism, which can drive the printing nozzle to translate along the height direction of the arc surface workpiece. The pre-curing lamp is directed towards the lower arc surface of the workpiece. The light-shielding position is either an empty space without any components or equipped with a light-shielding plate to isolate the light from the UV lamp curing position from propagating to the printing position. The UV lamp curing position is equipped with a UV curing lamp facing the arc surface of the workpiece.

[0007] Furthermore, the arc-shaped workpiece is a cup, a barrel, a cylindrical shell, or an arc-shaped cover, and the shape of the support base is adapted to the bottom inner or outer contour of the arc-shaped workpiece to achieve stable sleeve positioning.

[0008] Furthermore, the turntable is equipped with a power component that drives its rotation at the position corresponding to each of the support seats. The power component is a motor, and the support seat is fixedly connected to the rotating shaft of the corresponding motor.

[0009] Furthermore, the turntable is connected to a cam divider that can drive it to rotate intermittently counterclockwise by 60°, so that each support seat can accurately correspond to each workstation; the rotating shaft of the cam divider is fixedly connected to the center of the turntable, realizing the precise start and stop rotation of the turntable.

[0010] Furthermore, the plasma corona nozzle is connected to a plasma corona generator, which provides the plasma corona nozzle with operating power and medium.

[0011] Furthermore, the printhead translation mechanism can drive the printhead to achieve bidirectional translational movement from one end of the arc-shaped workpiece to the other.

[0012] Furthermore, the nozzle translation mechanism is a linear actuator or a lead screw translation track.

[0013] Furthermore, the pre-curing lamp is a UV pre-curing lamp, which performs real-time pre-curing on the printed arc surface of the workpiece during the printing process of the print head.

[0014] Furthermore, the spray angle of the plasma corona nozzle is adjustable to adapt to the treatment of arc surfaces of workpieces with different curvatures.

[0015] Furthermore, the UV curing lamp is a ring-shaped UV curing lamp, which can achieve 360° curing without dead angles on the arc surface of the rotating arc workpiece.

[0016] Furthermore, both the discharge operating table and the feed operating table are horizontally arranged operating platforms, and the docking end with the external production line equipment is provided with a suitable connection structure.

[0017] The present invention provides a vertical multi-station arc surface printing device, which achieves continuous operation of the entire process for arc surface workpieces through a vertical multi-station closed-loop layout and precise intermittent rotation drive; achieves arc surface printing without dead angles through the cooperation of the support base rotation and the vertical translation of the printhead; achieves ink splash prevention and pattern fidelity through the design of printing and pre-curing simultaneously; and achieves printhead clogging prevention through the isolation of UV light by the gaps or light shields, significantly improving printing quality, production efficiency and equipment stability. Compared with the prior art, the specific beneficial effects are as follows: 1. Significantly improved printing quality and high finished product qualification rate: This invention improves ink adhesion to the surface of curved workpieces through pretreatment at the plasma corona treatment site. Combined with the vertical translation of the print head and the 360° rotation of the curved workpiece, it achieves seamless printing on the curved surface. The core design of printing and pre-curing simultaneously counteracts the centrifugal force of the rotating curved workpiece, preventing ink splashing and splashing, and avoiding blurring and distortion of the pattern. Finally, the UV lamp curing site provides 360° seamless final curing, accelerating ink drying and forming, and preventing pattern scratches during the output process. This completely solves the problems of pattern distortion, peeling, and scratches in existing technologies, effectively improving the finished product qualification rate.

[0018] 2. Significantly improved production efficiency and continuous operation: This invention adopts a multi-station closed-loop layout of a vertical turntable, combined with the precise intermittent rotation of the cam divider, to achieve continuous operation of the entire process from feeding, corona treatment, printing, curing, to discharging. Each support can perform different processes simultaneously. Compared with the existing single-station intermittent operation and the step-by-step operation of the split mechanism, it effectively improves the output per unit time. At the same time, the flexible switching design of manual / automatic loading and unloading can adapt to the needs of different production scales without changing the equipment structure, further improving production efficiency.

[0019] 3. Strong equipment stability and long service life: This invention achieves complete isolation between UV light and the print head through the gaps in the light-shielding position or the structure of the light-shielding plate, which fundamentally avoids the problem of ink drying and clogging inside the print head and reduces the probability of equipment failure.

[0020] 4. Simplified equipment structure, low manufacturing cost and low maintenance difficulty: The present invention uses a sleeve-type support base to replace the complex clamping and rotating mechanism in the prior art, eliminating cumbersome components such as lifting, clamping and positioning, greatly simplifying the overall structure of the equipment and significantly reducing manufacturing costs; at the same time, each workstation has independent functions and a simple structure, without complex precision parts, making the equipment easy to maintain and low in maintenance costs, suitable for use by small and medium-sized production enterprises.

[0021] 5. Strong adaptability and versatility, with a wide range of applications: The support base of this invention can be adapted to the contours of different types of arc-shaped workpieces, and can stably mount various workpieces with arc surfaces such as cups, barrels, cylindrical shells, and arc-shaped covers. This solves the problem that existing equipment can only adapt to specific workpieces, and has strong versatility. The feeding / discharging operation table is compatible with both manual and automatic loading and unloading, and can be flexibly switched without modifying the equipment to meet the needs of different production scales. The rotation speed of the support base and the translation speed of the printing nozzle can be adjusted independently. The spray angle of the plasma corona nozzle and the irradiation angle of the pre-curing lamp can also be adjusted, which can adapt to the printing of arc-shaped workpieces with different materials, curvatures, and heights. It can be applied to the printing and processing of workpieces made of various materials such as plastics, stainless steel, ceramics, and glass, and has wide application value in many fields such as catering packaging, industrial parts, advertising displays, and daily necessities. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of each station of the vertical multi-station arc surface printing device described in this invention; Figure 2 This is a schematic diagram of the structure of a vertical multi-station arc surface printing device for printing workpieces without an arc surface covering, as described in this invention. Figure 3 This is a schematic diagram of the first-view structure of the vertical multi-station arc surface printing device of the present invention after the arc surface workpiece is fitted. Figure 4 This is a second-view structural diagram of the vertical multi-station arc surface printing device of the present invention after the arc surface workpiece is fitted.

[0023] Illustration markings: 1-Turntable, 2-Discharge position, 3-Infeed position, 4-Plasma corona treatment position, 5-Printing position, 6-Light-shielding position, 7-UV curing position, 8-Arc-shaped workpiece, 9-Support base, 10-Discharge operating table, 11-Infeed operating table, 12-Plasma corona nozzle, 13-Printing nozzle, 14-UV curing lamp, 15-Nozzle translation mechanism, 16-Pre-curing lamp. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-4 As shown, this solution provides a vertical multi-station arc surface printing device, including a vertically arranged circular turntable 1. The turntable 1 is the core load-bearing component of the entire device. It is vertically arranged, which can effectively save the horizontal space occupied by the equipment and facilitate the installation and loading / unloading of arc surface workpieces 8. Six support seats 9 are evenly spaced along the circumferential direction on the outer surface of the turntable 1, which can stably support the arc-shaped workpiece 8. The arc-shaped workpiece 8 is a component with an arc surface, such as a cup, a barrel, a cylindrical shell, or an arc-shaped cover. The shape of the support seat 9 is adapted to the inner or outer contour of the bottom of the arc-shaped workpiece 8, which can prevent the arc-shaped workpiece 8 from tilting or falling off during rotation and printing. Each support seat 9 can rotate freely relative to the turntable 1. The turntable 1 is equipped with a power component to drive the rotation of each support seat 9. After the arc-shaped workpiece 8 is placed, it can drive the arc-shaped workpiece 8 to rotate 360° synchronously. When the arc-shaped workpiece 8 reaches the plasma corona position 4, the printing position 5, and the UV lamp curing position 7, it can rotate under the drive of the corresponding position, so that the arc surface can face the working part of the corresponding position, and complete the full plasma corona, dead-angle printing, and full curing of printing ink.

[0026] like Figure 1As shown, the turntable 1 has six workstations arranged at equal intervals in a counterclockwise direction along its outer circumferential direction: discharge station 2, feed station 3, plasma corona treatment station 4, printing station 5, light-shielding station 6, and UV lamp curing station 7. Each of the six workstations corresponds to one of the six support seats 9. The included angle between adjacent support seats 9 is 60°. The turntable 1 is connected to a cam divider that can drive it to rotate 60° counterclockwise intermittently, so that each support seat 9 can accurately correspond to each workstation. This ensures that the arc-shaped workpiece 8 fitted on the support seat 9 can complete the closed-loop operation of feeding, plasma corona treatment, printing, light-shielding, UV lamp curing, and discharge in sequence through the counterclockwise intermittent rotation of the turntable 1, realizing continuous operation of the entire process and greatly improving production efficiency.

[0027] The discharge position 2 is equipped with a discharge operating table 10 adapted for manual / automatic loading and unloading, and the feeding position 3 is equipped with a feeding operating table 11 adapted for manual / automatic loading and unloading. This allows for flexible switching between manual and automatic loading and unloading without changing the equipment structure, adapting to different production scales. The plasma corona treatment position 4 is equipped with a plasma corona nozzle 12 facing the arc surface of the workpiece 8, enabling plasma corona pretreatment of the arc surface of the workpiece 8, improving ink adhesion and preventing pattern detachment and smudging. The printing position 5 is equipped with a printing nozzle 13, a nozzle translation mechanism 15 perpendicular to the surface of the turntable 1, and a pre-curing lamp 16 located below the support base 9. The printing nozzle 13 is connected to the nozzle translation mechanism 15, which drives the printing nozzle 13 to translate along the height direction of the arc surface workpiece 8, achieving seamless printing with the 360° rotation of the arc surface workpiece 8. The pre-curing lamp 16 is directed towards the arc surface workpiece 8. The lower arc surface of the arc-shaped workpiece 8 can be pre-cured in real time during the printing process, offsetting the centrifugal force generated by the rotation of the arc-shaped workpiece 8, preventing ink splashing and splashing, and avoiding blurring and distortion of the pattern; the light-shielding position 6 is an empty space without any parts or equipped with a light-shielding plate. When the empty space is used, light isolation is achieved through physical space interval. When a light-shielding plate is set, the light-shielding plate can be made of opaque material, and its installation position is adapted to the spacing of the turntable 1, ensuring that the arc-shaped workpiece 8 can flow smoothly while completely blocking the light from the UV lamp curing position 7 from propagating to the printing position 5, fundamentally avoiding the ink drying and clogging problem caused by UV light irradiating the print head 13, and improving the stability of equipment operation; the UV lamp curing position 7 is equipped with a UV curing lamp 14 facing the arc surface of the arc-shaped workpiece 8, which can perform comprehensive UV curing treatment on the arc surface of the printed arc-shaped workpiece 8, accelerate ink drying and forming, and prevent the pattern from being scratched or damaged during the output process.

[0028] As a preferred embodiment of the present invention, the power component driving the rotation of the support base 9 is a motor. The support base 9 is fixedly connected to the rotating shaft of the corresponding motor, enabling independent control of the rotation speed and rotation angle of the support base 9. This adapts to the processing requirements of workpieces 8 with different curvatures and heights, improving printing accuracy. The rotating shaft of the cam divider is fixedly connected to the center of the turntable 1, enabling precise start and stop rotation of the turntable 1. This ensures the alignment accuracy of the support base 9 with each workstation, avoiding processing errors caused by alignment deviations.

[0029] The plasma corona nozzle 12 is connected to the plasma corona machine, which provides the working power and medium for the plasma corona nozzle 12 to ensure the effect of plasma corona pretreatment. The spray angle of the plasma corona nozzle 12 is adjustable to adapt to the treatment of arc-shaped workpieces with different curvatures, thereby improving the versatility of the equipment.

[0030] like Figure 3 and Figure 4 As shown, the printhead translation mechanism 15 can drive the printhead 13 to achieve bidirectional translational movement from one end of the arc-shaped workpiece 8 to the other end. Combined with the 360° rotation of the arc-shaped workpiece 8, it completely eliminates the printing blind spot and achieves dead-angle-free printing on the arc surface of the arc-shaped workpiece 8. The printhead translation mechanism 15 is a linear actuator or a lead screw translation track. The linear actuator has the advantages of fast response speed and high transmission efficiency, while the lead screw translation track has the advantages of high positioning accuracy and stable operation. It can be flexibly selected according to actual production needs.

[0031] The pre-curing lamp 16 is a UV pre-curing lamp, whose irradiation power and irradiation angle are adjustable. It can adjust the pre-curing effect according to the ink type and the rotation speed of the arc-shaped workpiece 8, ensuring that pre-curing does not affect subsequent printing operations. The UV curing lamp 14 is a ring-shaped UV curing lamp, which can achieve 360° irradiation and curing of the rotating arc-shaped workpiece 8 without dead angles, ensuring the uniformity of ink curing and improving the adhesion of the pattern.

[0032] like Figure 2 and Figure 3 As shown, both the discharge operating table 10 and the feed operating table 11 are horizontally set operating platforms. The docking end with the external production line equipment is equipped with a matching connection structure, which facilitates precise docking with the external production line equipment and realizes fully automatic continuous production. The edge of the operating table is equipped with a limiting guard to prevent the arc-shaped workpiece 8 from slipping and being damaged during manual loading and unloading, thereby improving the safety of operation.

[0033] The specific working process of the vertical multi-station arc surface printing device of the present invention is as follows: S1. Feeding process: The cam divider drives the turntable 1 to stand still. One of the support seats 9 is precisely aligned with the feeding position 3. The operator or the production line equipment stably places the workpiece 8 to be printed on the support seat 9 on the feeding operation table 11 to complete the feeding. S2. Workstation Flow: The cam divider drives the turntable 1 to rotate 60° counterclockwise. The arc-shaped workpiece 8 that has been fed is transferred to the plasma corona station 4 along with the support seat 9. At the same time, the next empty support seat 9 is transferred to the feeding station 3 to feed the next arc-shaped workpiece 8, realizing the parallel operation of multiple workpieces. S3. Plasma corona process: After the arc-shaped workpiece 8 moves to the plasma corona position 4, the turntable 1 stops. The motor drive support 9 at this position drives the arc-shaped workpiece 8 to rotate. The plasma corona nozzle 12 sprays plasma onto the arc surface of the rotating arc-shaped workpiece 8 to complete the comprehensive corona pretreatment and improve ink adhesion. S4. Printing process: After the corona treatment is completed, the turntable 1 rotates counterclockwise by 60° again, and the arc-shaped workpiece 8 flows to the printing position 5. The turntable 1 stops, and the motor-driven support base 9 at this position drives the arc-shaped workpiece 8 to rotate. At the same time, the nozzle translation mechanism 15 drives the printing nozzle 13 to translate along the height direction of the arc-shaped workpiece 8 to achieve inkjet printing without dead angles. During the printing process, the pre-curing lamp 16 continuously irradiates to complete the printing and pre-curing at the same time to prevent ink splashing. S5. Light-shielding flow: After printing, turntable 1 rotates counterclockwise by 60°, and the arc-shaped workpiece 8 flows to the light-shielding position 6. Turntable 1 stops, and the arc-shaped workpiece 8 stays here briefly. The light is isolated from the UV curing lamp 14 by the gap or the light shield, so as to prevent the UV light from scattering to the printing position 5. S6. UV curing process: After the light-proof stop, the turntable 1 rotates counterclockwise by 60°, and the arc-shaped workpiece 8 flows to the UV lamp curing position 7. The turntable 1 stops, and the motor-driven support base 9 at this position drives the arc-shaped workpiece 8 to rotate. The UV curing lamp 14 irradiates the rotating arc-shaped workpiece 8 with 360° no dead angle, completing the final curing of the ink. S7. Unloading process: After curing, turntable 1 rotates counterclockwise 60° for the last time, and the arc-shaped workpiece 8 flows to the unloading position 2. Turntable 1 stops, and the operator or production line equipment removes the printed and cured arc-shaped workpiece 8 from the unloading operation table 10 to complete the unloading. S8. Cyclic Operation: The above processes are carried out simultaneously. The 6 support seats 9 correspond to 6 workstations respectively, realizing the parallel processing of multiple workpieces. While one workpiece is being discharged, a new arc-shaped workpiece 8 is being fed, forming a closed-loop continuous operation process, which greatly improves production efficiency.

[0034] Example 1 This embodiment provides a vertical multi-station arc surface printing device, including a vertically arranged circular turntable 1. Six support seats 9 are evenly spaced along the circumference on the outer surface of the turntable 1. Each support seat 9 is equipped with a stepper motor at a corresponding position. The support seat 9 is fixedly connected to the stepper motor shaft. The stepper motor drives the support seat 9 to rotate freely relative to the turntable 1. The turntable 1 is fixedly connected to the shaft of a cam divider. The cam divider can drive the turntable 1 to rotate 60° counterclockwise intermittently, so that each support seat 9 is precisely aligned with each station.

[0035] The turntable 1 is arranged in a counterclockwise direction along its circumferential external space as follows: discharge position 2, feed position 3, plasma corona position 4, printing position 5, light-shielding position 6, and UV curing position 7. The discharge position 2 is equipped with a discharge operating table 10, and the feed position 3 is equipped with a feed operating table 11, which adopts a manual loading and unloading operation mode. The edge of the operating table is equipped with a limiting stop. The plasma corona position 4 is equipped with a plasma corona nozzle 12, which is connected to the plasma corona machine and the spray angle is adjustable. The printing position 5 is equipped with a printing nozzle 13, a screw-track type nozzle translation mechanism 15, and a UV pre-curing lamp. The printing nozzle 13 is connected to the screw-track transmission. The UV pre-curing lamp is located below the support base 9 and the irradiation direction is towards the lower arc surface of the arc-shaped workpiece 8. The light-shielding position 6 is an empty space without any parts. The UV curing position 7 is equipped with a ring UV curing lamp 14, which can achieve 360° irradiation of the arc surface of the arc-shaped workpiece 8 without dead angles.

[0036] The device in this embodiment is applied to the printing and processing of plastic cups (a type of arc-shaped workpiece 8). The shape of the support base 9 is adapted to the inner contour of the bottom of the plastic cup to achieve stable mounting. The workflow is as follows: the operator places the plastic cup onto the support base 9 on the feeding table 11. The cam divider drives the turntable 1 to rotate 60°. The plastic cup flows sequentially to the plasma corona station 4 to complete the corona pretreatment, the printing station 5 to complete the printing and pre-curing without dead angles, the light-shielding station 6 to complete the light isolation through spatial intervals, and the UV lamp curing station 7 to complete the final curing of the ink. Finally, it flows to the discharge station 2, where the operator removes the finished plastic cup from the discharge table 10, realizing continuous operation.

[0037] Example 2 The difference between this embodiment and Embodiment 1 is as follows: the nozzle translation mechanism 15 adopts a linear actuator; the operating tables of the feeding position 3 and the discharging position 2 are connected to the external assembly line equipment, and an automatic loading and unloading operation mode is adopted; the docking end of the operating table and the assembly line equipment is provided with a snap-fit ​​connection structure; the power component driving the support base 9 to rotate is a servo motor, and the rotation speed can be infinitely adjusted; the spray angle of the plasma corona nozzle 12 and the irradiation angle of the pre-curing lamp 16 are both electrically adjustable and can be precisely controlled through the control panel; the light-shielding position 6 is provided with a light-shielding plate, which is made of opaque metal material, and its installation height is adapted to the spacing of the turntable 1 to ensure that the plastic cup can flow smoothly and completely block UV light; the shape of the support base 9 is adapted to the bottom outer contour of the stainless steel barrel (a type of arc-shaped workpiece 8), and the rest of the structure is the same as that of Embodiment 1.

[0038] This embodiment is applied to the batch printing and processing of stainless steel barrels, which can realize fully automated continuous operation without manual intervention, effectively improve printing accuracy, and the equipment can achieve long-term continuous trouble-free operation, greatly reducing labor costs and improving production efficiency.

[0039] Example 3 The difference between this embodiment and embodiment 1 is that: the shape of the support base 9 is adapted to the inner contour of the bottom of the arc-shaped plastic cover (a type of arc-shaped workpiece 8); the spray angle of the plasma corona nozzle 12 is adjusted to the appropriate angle according to the curvature of the arc-shaped plastic cover; the irradiation power of the pre-curing lamp 16 is adjusted according to the ink type; the light-shielding position 6 is provided with a light-shielding plate made of transparent material; the surface of the light-shielding plate is coated with an opaque coating; and the rest of the structure is the same as that of embodiment 1.

[0040] This embodiment is applied to the printing and processing of curved plastic covers, which can achieve precise printing of curved surfaces without dead angles, with firm pattern adhesion and no distortion or scratches, and is suitable for the processing needs of curved workpieces.

[0041] The above description is merely illustrative of the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical multi-station arc-surface printing device, characterized by, The application relates to a circular arc surface workpiece processing device, which comprises a longitudinally arranged circular rotating disc (1), a plurality of support seats (9) capable of stably sleeving the circular arc surface workpiece (8) are arranged on the outer surface of the rotating disc (1) in the circumferential direction, each support seat (9) can freely rotate relative to the rotating disc (1); the outer space of the rotating disc (1) in the circumferential direction is sequentially provided with an ejection position (2), an inlet position (3), a plasma corona position (4), a printing position (5), a light shielding position (6) and a UV lamp curing position (7) in the counterclockwise direction. The plasma corona position (4) is provided with a plasma corona nozzle (12) facing the circular arc surface of the circular arc surface workpiece (8); the printing position (5) is provided with a printing nozzle (13), a nozzle translation mechanism (15) vertically arranged relative to the surface of the rotating disc (1) and a pre-curing lamp (16) arranged below the support seat (9), the printing nozzle (13) is in transmission connection with the nozzle translation mechanism (15), the nozzle translation mechanism (15) can drive the printing nozzle (13) to translate in the height direction of the circular arc surface workpiece (8), the irradiation direction of the pre-curing lamp (16) is towards the lower circular arc surface of the circular arc surface workpiece (8); the light shielding position (6) is used for isolating the light of the UV lamp curing position (7) from propagating to the printing position (5); the UV lamp curing position (7) is provided with a UV curing lamp (14) facing the circular arc surface of the circular arc surface workpiece (8).

2. The vertical multi-station cambered surface printing device according to claim 1, wherein, The circular arc surface workpiece (8) is a cup body, a barrel body, a cylindrical shell or an arc cover body, the outer shape of the support seat (9) is matched with the inner contour or the outer contour of the bottom of the circular arc surface workpiece (8), so that the stable sleeving positioning is realized.

3. The vertical multi-station cambered surface printing apparatus according to claim 1, wherein The rotating disc (1) is provided with a power member corresponding to each support seat (9) and driving the rotation of the support seat (9), the power member is a motor, the support seat (9) is fixedly connected with the rotating shaft of the corresponding motor.

4. The vertical multi-station cambered surface printing apparatus according to claim 1, wherein The rotating disc (1) is connected with a cam divider capable of driving the counterclockwise intermittent rotation of the rotating disc (1), so that each support seat (9) can be accurately matched with each position; the rotating shaft of the cam divider is fixedly connected with the center of the rotating disc (1), so that the accurate start-stop rotation of the rotating disc (1) is realized.

5. The vertical multi-station cambered surface printing apparatus according to claim 1, wherein The plasma corona nozzle (12) is connected with a plasma corona machine, the plasma corona machine provides the working power and medium for the plasma corona nozzle (12).

6. The vertical multi-station cambered surface printing apparatus according to claim 1, wherein The nozzle translation mechanism (15) can drive the printing nozzle (13) to realize the bidirectional translation movement from one end to the other end of the circular arc surface workpiece (8).

7. The vertical multi-station cambered surface printing apparatus according to claim 6, wherein The nozzle translation mechanism (15) is a linear actuator or a screw translation track.

8. The vertical multi-station cambered surface printing apparatus according to claim 1, wherein, The pre-curing lamp (16) is a UV pre-curing lamp, which can realize the real-time pre-curing of the printed circular arc surface of the circular arc surface workpiece (8) during the printing of the printing nozzle (13).

9. The vertical multi-station cambered surface printing apparatus according to claim 1, wherein, The spraying angle of the plasma corona nozzle (12) can be adjusted, so as to adapt to the processing of the circular arc surface of the circular arc surface workpiece (8) with different curvatures.

10. The vertical multi-station cambered surface printing apparatus according to claim 1, wherein, The UV curing lamp (14) is a ring-shaped UV curing lamp, which can realize the 360-degree dead angle-free irradiation curing of the circular arc surface of the rotating circular arc surface workpiece (8).

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