Label printing machine capable of adjusting curvature and using method thereof
The combined structure of telescopic cylinder, connecting frame, elastic plate and arc-shaped printing bending plate solves the problem that traditional label printing machines are difficult to adapt to different curved surfaces, realizes efficient and accurate label printing, and improves printing quality and production efficiency.
Patent Information
- Application Number
- CN202511218876.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2025-10-10
AI Technical Summary
Traditional label printers have difficulty adapting to labels with different curved surfaces. They are cumbersome to operate and have unstable printing quality. In particular, uneven ink distribution and damage are prone to occur on labels made of thin materials or sensitive surfaces such as film or thermal paper. In addition, the existing adjustment mechanism has low adjustment accuracy and slow response speed.
The combined structure of telescopic cylinder, connecting frame, elastic plate and arc-shaped printing bending plate is adopted. Through the cooperation of electric telescopic rod and elastic plate, precise adjustment and uniform fitting of arc-shaped printing bending plate can be achieved. Combined with the pre-compression of spring and the guiding effect of guide shaft, the stability and accuracy of printing process are ensured.
It achieves efficient and precise printing on complex curved surfaces, reduces printing defects, improves production efficiency and consistency of printing quality, and adapts to diverse labeling needs.
Smart Images
Figure CN120756196A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of label printing machines, and in particular to a label printing machine with adjustable curvature and a method of using the same. Background Art
[0002] In the field of label printing, with the increasing demand of the consumer market for personalized product appearance, the application of curved labels such as curved bottles and special-shaped packaging is becoming increasingly widespread. Traditional label printing machines usually use a printing roller with a fixed curvature, which can only adapt to the printing of flat or single-curvature labels. When faced with labels with different curvatures, manual replacement of printing components or re-debugging of equipment is required, which is cumbersome and inefficient, and cannot meet the production needs of small batches and multiple specifications. In addition, when traditional rigid printing structures contact curved labels, uneven pressure can easily lead to uneven ink distribution and damage to the label surface. In particular, for labels with thin materials or sensitive surfaces (such as films and thermal paper), the printing quality stability is poor. Some devices in the existing technology attempt to change the curvature of the printing component through mechanical linkages or manual adjustment mechanisms, but there are defects such as low adjustment accuracy and slow response speed. It is necessary to design a label printing machine with adjustable curvature and its use method to solve the above-mentioned problems. Summary of the Invention
[0003] To achieve the above object, the present invention is implemented through the following technical solution: a label printing machine with adjustable curvature, comprising a mounting plate, a telescopic cylinder fixedly connected to the middle of the bottom end of the mounting plate, a connecting frame fixedly connected to the telescopic end of the telescopic cylinder, an elastic plate fixedly connected to the bottom of the connecting frame, and an arc-shaped printing bent plate fixedly connected to the bottom of the elastic plate; The front and rear parts of the connecting frame are fixedly connected to the mounting shaft, the left and right ends of the mounting shaft are provided with electric telescopic rods, and the bottom of the electric telescopic rod is fixedly connected to the push rod; The four corners of the bottom of the connecting frame are each provided with a first mounting hole, the four corners of the upper portion of the elastic plate are each provided with a second mounting hole, and springs are fixedly connected between the upper and lower portions corresponding to the first mounting holes and the second mounting holes; The electric telescopic rods are located at the four corners of the upper portion of the elastic plate, and the pushing rods are located at the left and right end portions of the upper portion of the elastic plate.
[0004] Preferably, the fixed ends of the electric telescopic rods are fixedly connected to connecting sleeves, and the inner wall of the connecting sleeves is provided with an annular groove matching the mounting shaft, which can be slid along the left and right sides of the mounting shaft to adjust the position; A threaded column is fixedly provided on the upper part of each connecting sleeve, and a locking bolt is threadedly connected to the upper part of each threaded column. An anti-slip rubber pad is provided on the end of each locking bolt to increase the friction force with the mounting shaft during locking; The left and right sides of the bottom of the mounting plate are fixedly connected with guide shafts, the left and right sides of the upper part of the elastic plate are fixedly connected with sliding sleeves, and the inner sides of the sliding sleeves are respectively slidably connected to the outer sides of the guide shafts.
[0005] Preferably, the elastic plate is made of a rubber material with an inverted T-shaped cross-section, the rubber material is nitrile rubber with a Shore hardness of 60A, and the thickness of the bottom of the T-shaped cross-section of the elastic plate is 5 mm; The arc-shaped printing bend plate is made of nickel-titanium alloy metal with a thickness of 1 mm. The initial arc radius of the arc-shaped printing bend plate is 80 mm, and a plurality of air holes with a diameter of 0.7 mm are evenly distributed on the plate surface of the arc-shaped printing bend plate.
[0006] Preferably, when the curvature of the curved printing bent plate needs to be increased, the electric telescopic rods on both sides are extended synchronously, and the push rods squeeze the left and right ends of the elastic plate downward, and the deformation of the elastic plate is used to drive the two sides of the curved printing bent plate to bend downward, forming curved surfaces with different curvatures.
[0007] A method for using a label printing machine with adjustable curvature is applied to the above-mentioned label printing machine with adjustable curvature, and includes the following steps: S1. Equipment installation and initial commissioning: According to the curvature requirements of the label surface, the initial extension of the electric telescopic rod is set through the control system. If the curvature needs to be increased, the electric telescopic rod is pre-extended so that the push rod touches the elastic plate. If the curvature needs to be reduced, the electric telescopic rod is kept shortened and the elastic plate is reset by the spring. S2. Curvature preset and arc printing bend plate positioning: Start the telescopic cylinder to drive the connecting frame down, so that the elastic plate and the arc printing bend plate contact the label surface. The spring is compressed during the descending process to provide uniform pre-pressure to ensure the initial fit between the arc printing bend plate and the label surface. S3. Pre-pressing the elastic plate and the printing curved plate: Start the telescopic cylinder to drive the connecting frame to continuously descend, so that the elastic plate and the curved printing curved plate gradually contact the label surface. During this process, the spring is further compressed to the preset stroke, and the elastic deformation of the spring provides a stable and uniform pre-pressing force, ensuring that the curved printing curved plate fully fits the label surface with constant pressure, providing a stable reference surface for subsequent dynamic curvature adjustment. At the same time, the sliding guidance of the guide shaft and the sliding sleeve ensures that the elastic plate has no lateral deviation during the fitting process, thereby improving the pre-pressing accuracy. S4. Dynamic curvature adjustment and printing: According to the curvature of the label surface, the extension and retraction of the electric telescopic rod is adjusted in real time through the control system. When the curvature needs to be increased, the electric telescopic rods on both sides extend synchronously, pushing the rods to squeeze the left and right ends of the elastic plate, causing the middle of the elastic plate to bend downward, driving the curved printing plate to form the target curvature. When the curvature needs to be reduced, the electric telescopic rods shorten synchronously, and the spring pushes the elastic plate back to its original position, and the curved printing plate returns to its initial curvature. S5. Printing completed and equipment reset: After printing is completed, the telescopic cylinder drives the connecting frame to rise and separate from the label surface. The electric telescopic rod returns to its initial shortened state. The elastic plate is fully reset under the action of the spring, and the arc printing bending plate returns to its initial curvature. S6. Switching between multiple specifications of labels and recording parameters: If you need to print labels with different curvatures, repeat steps S2-S5. By adjusting the position and extension of the electric telescopic rod to adapt to the new specifications, the system automatically records the parameters of the electric telescopic rod corresponding to each specification of label, which is convenient for quick call next time.
[0008] The method for using a label printer with adjustable curvature according to claim 5 is characterized in that: during the S1 equipment installation and initial debugging steps, the thickness of the gasket between the first mounting hole and the second mounting hole is adjusted according to the compression state of the spring, so that the initial pre-compression amount of the spring is maintained at 2-3 mm, ensuring that the elastic plate is evenly stressed during the printing process.
[0009] Preferably, during the S1 equipment installation and initial debugging steps, the thickness of the gasket between the first mounting hole and the second mounting hole is adjusted by adjusting the compression state of the spring so that the initial pre-compression amount of the spring is maintained at 2-3 mm, ensuring that the elastic plate is evenly stressed during the printing process.
[0010] Preferably, in the S4 dynamic curvature adjustment and printing step, if it is necessary to achieve asymmetric bending of the arc-shaped printing bend plate, the extension of the left and right electric telescopic rods can be adjusted separately through the control system, so that the push rods apply different pressures to the two sides of the elastic plate, and the T-shaped rubber structure of the elastic plate realizes the local curvature change of the arc-shaped printing bend plate.
[0011] Preferably, in the S6 multi-specification label switching and parameter recording step, the scale lines on the surface of the mounting shaft are used to record the position parameters of the connecting sleeve on the mounting shaft, which form a corresponding relationship with the elongation parameters of the electric telescopic rod and are stored in the control system. The next time the same specification label is switched, the preset parameters can be directly called to automatically adjust the connecting sleeve and the electric telescopic rod to the target position.
[0012] In summary, the present invention provides a label printing machine with adjustable curvature and a method of using the same, which have the following beneficial effects: 1. Through the telescopic cylinder, connecting frame, elastic plate and curved printing plate, the telescopic cylinder accurately controls the lifting and lowering of the connecting frame, driving the elastic plate and curved printing plate to contact labels at different heights. Combined with the buffering effect of the elastic plate, it not only avoids label damage, but also ensures that the curved printing plate fits the curved surface, improving printing accuracy and quality.
[0013] 2. Through the installation shaft, the electric telescopic rod, the push rod and the elastic plate, the installation shaft flexibly adjusts the position of the electric telescopic rod, the electric telescopic rod drives the push rod to extrude the end of the elastic plate, the high-efficiency and accurate adjustment of the curvature of the arc-shaped printing bending plate is realized by using the principle of lever and multi-directional stress, and the printing demand of complex curved surface labels is adapted.
[0014] 3. Through the S1 device installation and initial debugging and the S2 curvature presetting step, in the S1, the spring pre-compression amount adjustment and the initial position setting of the electric telescopic rod are combined, the descending of the connecting frame driven by the telescopic cylinder and the pre-pressure provided by the spring are combined, the uniform stress of the elastic plate is ensured, the arc-shaped printing bending plate is preliminarily attached to the label, a stable foundation is laid for subsequent dynamic shaping, and the printing defects are reduced.
[0015] 4. Through the S4 dynamic curvature adjustment and the S6 multi-specification label switching step, in the S4, the real-time adjustment of the electric telescopic rod is realized to realize the symmetric or asymmetric curvature change of the arc-shaped printing bending plate, in the S6, the installation shaft scale and the electric telescopic rod parameters are recorded, and the preset value is called to quickly switch the specifications, diversified label demand is met, production efficiency and parameter adjustment accuracy are improved, and the consistency of the printing quality is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a three-dimensional structure schematic view of the label printing machine with adjustable curvature and the use method thereof; Figure 2 It is a three-dimensional structure schematic view of the elastic plate and the arc-shaped printing bending plate of the label printing machine with adjustable curvature and the use method thereof; Figure 3 It is a three-dimensional structure schematic view of the connecting frame and the elastic plate of the label printing machine with adjustable curvature and the use method thereof; Figure 4 It is an enlarged schematic view of the structure at A of the label printing machine with adjustable curvature and the use method thereof.
[0017] MARKING OF THE DRAWINGS: 1, mounting plate; 2, telescopic cylinder; 3, connecting frame; 4, elastic plate; 5, arc-shaped printing bending plate; 6, installation shaft; 7, electric telescopic rod; 8, connecting sleeve; 9, threaded column; 10, locking bolt; 11, first mounting hole; 12, second mounting hole; 13, spring; 14, guide shaft; 15, sliding sleeve; 16, push rod. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings Figure 1 - the drawings Figure 4 , the present application is further described in detail.
[0019] EMBODIMENT: Please refer to Figures 1-4As shown, the present invention provides a technical solution: a label printing machine with adjustable curvature, comprising a mounting plate 1, a telescopic cylinder 2 is fixedly connected to the middle of the bottom end of the mounting plate 1, the telescopic end of the telescopic cylinder 2 is fixedly connected to a connecting frame 3, an elastic plate 4 is fixedly connected to the bottom of the connecting frame 3, and an arc-shaped printing bent plate 5 is fixedly connected to the bottom of the elastic plate 4. The telescopic cylinder 2 can accurately control the lifting height of the connecting frame 3 and the components below, ensuring that the arc-shaped printing bent plate 5 can accurately contact labels at different heights, adapt to various printing scenarios, and improve the accuracy and versatility of printing; at the same time, the elastic plate 4 can buffer the impact force of the arc-shaped printing bent plate 5 when contacting the label, avoiding damage to the label surface, and helping the arc-shaped printing bent plate 5 to better fit the label surface, thereby improving printing quality; The front and rear parts of the connecting frame 3 are fixedly connected with the mounting shaft 6, and the left and right ends of the mounting shaft 6 are provided with an electric telescopic rod 7. The bottom of the electric telescopic rod 7 is fixedly connected with a push rod 16. Through the mounting shaft 6, the position of the electric telescopic rod 7 can be flexibly adjusted to meet the requirements of the curvature adjustment range of labels of different sizes. The electric telescopic rod 7 can accurately control the extension and contraction amount of the push rod 16, and then accurately adjust the curvature of the arc-shaped printing bending plate 5 to meet the printing requirements of various complex label curved surfaces, greatly improving the adaptability of the equipment to different labels and broadening the application range of the equipment. The four corners of the bottom of the connecting frame 3 are each provided with a first mounting hole 11, and the four corners of the upper portion of the elastic plate 4 are each provided with a second mounting hole 12. Springs 13 are fixedly connected between the corresponding first mounting holes 11 and the second mounting holes 12 at the upper and lower parts. The springs 13 play a buffering and force-balancing role between the connecting frame 3 and the elastic plate 4. During the printing process, it can ensure that the elastic plate 4 is subjected to a uniform force, so that the arc-shaped printing bent plate 5 is in full and uniform contact with the label surface, thereby achieving a clearer and more consistent printing effect, avoiding printing defects caused by local uneven force, and improving the stability of printing quality; The electric telescopic rods 7 are located at the four upper corners of the elastic plate 4, and the pushing rods 16 are located at the left and right ends of the upper part of the elastic plate 4. The electric telescopic rods 7 at the four corners can apply force to the elastic plate 4 from multiple directions, thereby achieving precise control of the deformation of the elastic plate 4, and thus more accurately adjusting the curvature of the arc-shaped printing bent plate 5. The pushing rods 16 are located at the left and right ends of the upper part of the elastic plate 4, and can effectively utilize the lever principle to generate a larger force with a smaller telescopic amount, efficiently change the curvature of the elastic plate 4 and the arc-shaped printing bent plate 5, and improve the efficiency and accuracy of the curvature adjustment.
[0020] The fixed ends of the electric telescopic rods 7 are fixedly connected to the connecting sleeves 8. The inner wall of the connecting sleeves 8 is provided with an annular groove matching the mounting shaft 6. The position can be adjusted by sliding along the left and right sides of the mounting shaft 6. The connecting sleeves 8 can slide along the mounting shaft, which is convenient for flexibly changing the position of the electric telescopic rods 7 according to the label size and printing requirements, so that the equipment can better adapt to the printing of labels of different specifications, thereby enhancing the versatility and flexibility of the equipment and reducing the workload of re-debugging the equipment due to changes in label specifications. The upper part of the connecting sleeve 8 is fixedly provided with a threaded column 9, and the upper part of the threaded column 9 is threadedly connected with a locking bolt 10. The end of the locking bolt 10 is provided with an anti-skid rubber pad, which is used to increase the friction with the installation shaft 6 when locking. When the connecting sleeve 8 is adjusted to a suitable position, by tightening the locking bolt 10, the increased friction between the anti-skid rubber pad and the installation shaft 6 can be used to firmly fix the position of the connecting sleeve 8, preventing the connecting sleeve from being displaced due to vibration or other external forces during the printing process, ensuring the stability of the position of the electric telescopic rod 7, thereby ensuring the accuracy and stability of the curvature adjustment of the arc printing bending plate 5, and improving the reliability of printing quality; The left and right sides of the bottom of the mounting plate 1 are fixedly connected with guide shafts 14, and the left and right sides of the upper part of the elastic plate 4 are fixedly connected with sliding sleeves 15. The inner sides of the sliding sleeves 15 are slidably connected to the outer sides of the guide shafts 14 respectively. The guide shafts 14 provide precise guiding for the lifting and lowering of the elastic plate 4, ensuring the stability of the elastic plate 4 during the up and down movement, avoiding shaking or deviation, and thus ensuring that the arc-shaped printing bent plate 5 always maintains the correct posture when contacting the label, thereby improving the accuracy and stability of printing and reducing printing deviations caused by unstable movement of the elastic plate 4.
[0021] The elastic plate 4 is made of rubber with an inverted T-shaped cross-section. The rubber material is nitrile rubber with a Shore hardness of 60A. The thickness of the bottom of the T-shaped cross-section of the elastic plate 4 is 5mm. Nitrile rubber has good elasticity, wear resistance and oil resistance, which can ensure that the elastic plate 4 maintains stable elastic properties during long-term use and is not easy to age and damage. The inverted T-shaped cross-section design increases the contact area between the elastic plate 4 and the connecting frame 3 and the curved printing plate 5, improves the force transmission efficiency, and enables the elastic plate 4 to deform more evenly when subjected to force, better driving the curved printing plate 5 to conform to the label surface. At the same time, the 5mm thick bottom of the T-shaped cross-section provides sufficient strength and elasticity to ensure normal operation under various printing pressures, extend the service life of the elastic plate 4, and reduce equipment maintenance costs; The arc-shaped printing bend plate 5 is made of nickel-titanium alloy metal with a thickness of 1mm. The initial arc radius of the arc-shaped printing bend plate 5 is 80mm, and there are several air holes with a diameter of 0.7mm evenly distributed on the surface of the arc-shaped printing bend plate 5. Nickel-titanium alloy has shape memory function and good elasticity. It can accurately change the curvature under the drive of the elastic plate 4 and restore to its initial state after printing is completed, ensuring the accuracy and repeatability of the curvature adjustment of the arc-shaped printing bend plate 5; the 1mm thickness has good flexibility while ensuring a certain strength, which is convenient for curvature adjustment; the air holes evenly distributed on the plate surface can effectively discharge air during the printing process, preventing bubbles or unclear patterns in the printed pattern due to air residue, improving the clarity and quality of the printed pattern, and at the same time reducing the weight of the arc-shaped printing bend plate 5 and reducing the energy consumption of the equipment operation.
[0022] When it is necessary to increase the curvature of the curved printing curved plate 5, the electric telescopic rods 7 on both sides are extended synchronously, and the push rod 16 squeezes the left and right end portions of the elastic plate 4 downward, and uses the deformation of the elastic plate 4 to drive the two sides of the curved printing curved plate 5 to bend downward to form curved surfaces with different curvatures. Through the synchronous extension of the electric telescopic rods 7, the squeezing force and position of the push rods on the elastic plate can be accurately controlled, thereby achieving precise adjustment of the curvature of the curved printing curved plate 5; using the deformation of the elastic plate 4 to drive the curved printing curved plate 5 to bend, the curvature change of the curved printing curved plate 5 can be made more natural and uniform, which can better adapt to the complex shapes of various label surfaces, improve the adaptability and quality of printing, and the operation process is simple, which can be easily achieved through the control system, thereby improving production efficiency.
[0023] See also Figures 1-4 As shown, a method for using a label printing machine with adjustable curvature is applied to the above-mentioned label printing machine with adjustable curvature, and includes the following steps: S1. Equipment installation and initial commissioning: According to the curvature requirements of the label surface, the initial extension of the electric telescopic rod 7 is set through the control system. If the curvature needs to be increased, the electric telescopic rod 7 is pre-extended so that the push rod 16 lightly touches the elastic plate 4. If the curvature needs to be reduced, the electric telescopic rod 7 is kept in a shortened state, and the elastic plate 4 is reset by the spring 13. By setting the initial extension of the electric telescopic rod 7 through the control system, preparations can be made for printing different labels quickly and accurately, greatly improving the commissioning efficiency of the equipment. The state of the elastic plate 4 is adjusted by the reset function of the spring 13, which is simple and reliable to operate, reducing manual intervention and operating difficulty. At the same time, it can ensure that the equipment can quickly enter the working state under different curvature adjustment requirements, thereby improving production continuity. S2. Curvature presetting and arc printing bent plate positioning: Start the telescopic cylinder 2 to drive the connecting frame 3 to descend, so that the elastic plate 4 and the arc printing bent plate 5 contact the label surface. The spring 13 is compressed during the descent process, providing uniform pre-pressure to ensure that the arc printing bent plate 5 is initially fitted with the label surface. The telescopic cylinder 2 accurately controls the descending height of the connecting frame to ensure that the arc printing bent plate 5 accurately contacts the label surface. The uniform pre-pressure provided by the spring 13 enables the arc printing bent plate 5 to fit well with the label surface when it initially contacts the label, laying the foundation for subsequent precise curvature adjustment and high-quality printing, improving the success rate of printing, and reducing printing defects caused by poor initial fitting. S3. Pre-pressing the elastic plate and the printing curved plate: Start the telescopic cylinder 2 to drive the connecting frame 3 to continue to descend, so that the elastic plate 4 and the arc-shaped printing curved plate 5 gradually contact the label surface. During this process, the spring 13 is further compressed to the preset stroke, and the elastic deformation of the spring 13 provides a stable and uniform pre-pressure, ensuring that the arc-shaped printing curved plate 5 is fully fitted with the label surface with constant pressure, providing a stable reference surface for subsequent dynamic curvature adjustment. At the same time, the sliding guide of the guide shaft 14 and the sliding sleeve 15 ensures that the elastic plate 4 has no lateral deviation during the fitting process, thereby improving the pre-pressing accuracy. The connecting frame 3 is driven by the telescopic cylinder 2. The spring 13 is compressed to a preset stroke by descending, and the elastic deformation of the spring 13 is used to provide a stable and uniform pre-pressure, ensuring that the arc-shaped printing bending plate 5 fully fits the label surface with a constant pressure, laying a stable foundation for subsequent dynamic curvature adjustment; at the same time, the sliding guiding effect of the guide shaft 14 and the sliding sleeve 15 effectively prevents the elastic plate 4 from lateral deviation during the lamination process, improves the pre-pressure accuracy, ensures the uniformity and stability of label printing, and reduces printing defects caused by uneven lamination; S4. Dynamic curvature adjustment and printing: According to the curvature of the label surface, the extension and contraction amount of the electric telescopic rod 7 is adjusted in real time through the control system. When the curvature needs to be increased, the electric telescopic rods 7 on both sides are extended synchronously, and the push rod 16 squeezes the left and right ends of the elastic plate 4. The middle part of the elastic plate 4 bends downward, driving the curved printing plate 5 to form a target curvature. When the curvature needs to be reduced, the electric telescopic rod 7 is shortened synchronously, and the spring 13 pushes the elastic plate 4 to reset, and the curved printing plate 5 restores its initial curvature. The extension and contraction amount of the electric telescopic rod 7 is adjusted in real time. The curvature of the curved printing plate can be adjusted quickly and accurately according to the actual curvature of the label surface, thereby realizing dynamic and accurate printing. If asymmetric bending of the curved printing plate 5 is required, the extension amount of the left and right electric telescopic rods 7 can be adjusted separately through the control system, so that the push rod 16 applies different pressures to the two sides of the elastic plate 4, and the T-shaped rubber structure of the elastic plate 4 realizes the local curvature change of the curved printing plate 5. S5. Printing completion and equipment reset: After printing is completed, the telescopic cylinder 2 drives the connecting frame 3 to rise and separate from the label surface. The electric telescopic rod 7 returns to its initial shortened state. The elastic plate 4 is completely reset under the action of the spring 13. The arc-shaped printing bending plate 5 returns to its initial curvature, realizing automatic reset of the equipment. The operation is simple and efficient. The equipment quickly returns to its initial state and is ready for the next printing, thereby improving production efficiency. At the same time, it reduces the errors and time waste that may be caused by manual reset operations, ensuring the continuity and stability of equipment operation. S6. Switching between multiple specifications of labels and recording parameters: If you need to print labels with different curvatures, repeat steps S2-S5. By adjusting the position and extension of the electric telescopic rod 7 to adapt to the new specifications, the system automatically records the parameters of the electric telescopic rod 7 corresponding to each specification of labels, which is convenient for quick call next time. During the switching process of multiple specifications of labels, the system automatically records and calls parameters, which greatly improves the switching efficiency of the equipment for labels of different specifications. The operator does not need to manually readjust the equipment parameters every time, which reduces the possibility of operational errors, improves production efficiency, and reduces labor intensity.
[0024] In the S1 equipment installation and initial debugging steps, the thickness of the gasket between the first mounting hole 11 and the second mounting hole 12 is adjusted by the compression state of the spring 13, so that the initial pre-compression amount of the spring 13 is maintained at 2-3mm, ensuring that the elastic plate 4 is evenly stressed during the printing process. The thickness of the gasket between the first mounting hole 11 and the second mounting hole 12 is adjusted by the compression state of the spring 13, so that the initial pre-compression amount of the spring 13 is maintained at 2-3mm, ensuring that the elastic plate 4 is evenly stressed during the printing process. This can further ensure that the arc-shaped printing bent plate 5 is in uniform contact with the label surface, improve the stability of the printing quality, and avoid problems such as uneven depth of the printed pattern due to uneven force on the elastic plate 4.
[0025] In the S4 dynamic curvature adjustment and printing step, if it is necessary to achieve asymmetric bending of the arc-shaped printing bending plate 5, the extension of the electric telescopic rods 7 on the left and right sides can be adjusted separately through the control system, so that the push rod 16 applies different pressures on the two sides of the elastic plate 4. The T-shaped rubber structure of the elastic plate 4 realizes the local curvature change of the arc-shaped printing bending plate 5. The asymmetric bending adjustment function further expands the application range of the equipment and can meet the printing needs of some special labels, such as irregular-shaped labels or labels with special design requirements. It greatly improves the flexibility and applicability of the equipment and provides the possibility for printing diversified products.
[0026] In the S6 multi-specification label switching and parameter recording step, the scale lines on the surface of the installation shaft 6 are recorded, and the position parameters of the connecting sleeve 8 on the installation shaft 6 are corresponding to the elongation parameters of the electric telescopic rod 7. The corresponding relationship is stored in the control system. The next time the same specification label is switched, the preset parameters can be directly called, and the connecting sleeve 8 and the electric telescopic rod 7 can be automatically adjusted to the target position. The correspondence between the scale lines on the surface of the installation shaft 6 and the parameters makes the adjustment of the equipment parameters more intuitive and accurate, further ensuring the stability and accuracy of the equipment when printing labels of different specifications, and improving the consistency of product quality.
[0027] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.
Claims
1. A label printing machine with adjustable curvature, comprising a mounting plate (1), characterized in that: The middle of the bottom end of the mounting plate (1) is fixedly connected to a telescopic cylinder (2), the telescopic end of the telescopic cylinder (2) is fixedly connected to a connecting frame (3), the bottom of the connecting frame (3) is fixedly connected to an elastic plate (4), and the bottom of the elastic plate (4) is fixedly connected to an arc-shaped printing bent plate (5); The front and rear parts of the connecting frame (3) are fixedly connected to a mounting shaft (6), the left and right ends of the mounting shaft (6) are provided with an electric telescopic rod (7), and the bottom of the electric telescopic rod (7) is fixedly connected to a push rod (16); The four corners of the bottom of the connecting frame (3) are each provided with a first mounting hole (11), the four corners of the upper portion of the elastic plate (4) are each provided with a second mounting hole (12), and springs (13) are fixedly connected between the upper and lower portions corresponding to the first mounting holes (11) and the second mounting holes (12); The electric telescopic rod (7) is located at the four upper corners of the elastic plate (4), and the push rod (16) is located at the upper left and right end portions of the elastic plate (4).
2. The label printing machine with adjustable curvature according to claim 1, characterized in that: The fixed ends of the electric telescopic rods (7) are fixedly connected to connecting sleeves (8), and the inner wall of the connecting sleeves (8) is provided with an annular sliding groove matching the mounting shaft (6), and can be slid along the left and right sides of the mounting shaft (6) to adjust the position; The upper part of the connecting sleeve (8) is fixedly provided with a threaded column (9), the upper part of the threaded column (9) is threadedly connected with a locking bolt (10), and the end of the locking bolt (10) is provided with an anti-slip rubber pad for increasing the friction force with the installation shaft (6) when locking; The left and right sides of the bottom of the mounting plate (1) are fixedly connected to guide shafts (14), the left and right sides of the upper portion of the elastic plate (4) are fixedly connected to sliding sleeves (15), and the inner sides of the sliding sleeves (15) are respectively slidably connected to the outer sides of the guide shafts (14).
3. The label printing machine with adjustable curvature according to claim 1, characterized in that: The elastic plate (4) is made of a rubber material with an inverted T-shaped cross-section design, and the rubber material is nitrile rubber with a Shore hardness of 60A. The thickness of the bottom of the T-shaped cross-section of the elastic plate (4) is 5 mm. The arc-shaped printing bend plate (5) is made of a nickel-titanium alloy metal material with a thickness of 1 mm, the initial arc radius of the arc-shaped printing bend plate (5) is 80 mm, and a plurality of air holes with a diameter of 0.7 mm are evenly distributed on the plate surface of the arc-shaped printing bend plate (5).
4. The label printing machine with adjustable curvature according to claim 1, characterized in that: When the curvature of the curved printing curved plate (5) needs to be increased, the electric telescopic rods (7) on both sides are extended synchronously, and the push rods (16) press the left and right end portions of the elastic plate (4) downward, utilizing the deformation of the elastic plate (4) to drive the two sides of the curved printing curved plate (5) to bend downward, thereby forming curved surfaces with different curvatures.
5. A method for using a label printing machine with adjustable curvature, applied to a label printing machine with adjustable curvature according to any one of claims 1 to 4, characterized in that: The following steps are included: S1. Equipment installation and initial debugging: According to the curvature requirement of the label surface, the initial extension of the electric telescopic rod (7) is set through the control system. If the curvature needs to be increased, the electric telescopic rod (7) is pre-extended so that the push rod (16) touches the elastic plate (4). If the curvature needs to be reduced, the electric telescopic rod (7) is kept in a shortened state and the elastic plate (4) is reset by the spring (13); S2, curvature presetting and arc printing bent plate positioning: start the telescopic cylinder (2), drive the connecting frame (3) to descend, so that the elastic plate (4) and the arc printing bent plate (5) contact the label surface, and the spring (13) is compressed during the descending process to provide uniform pre-pressure to ensure that the arc printing bent plate (5) and the label surface are initially attached; S3, pre-pressing the elastic plate and the printing curved plate: start the telescopic cylinder (2) to drive the connecting frame (3) to continuously descend, so that the elastic plate (4) and the arc-shaped printing curved plate (5) gradually contact the label surface. During this process, the spring (13) is further compressed to a preset stroke, and a stable and uniform pre-pressing force is provided by the elastic deformation of the spring (13), ensuring that the arc-shaped printing curved plate (5) is fully fitted with the label surface at a constant pressure, providing a stable reference surface for subsequent dynamic curvature adjustment, and at the same time, through the sliding guide of the guide shaft (14) and the sliding sleeve (15), it is ensured that the elastic plate (4) has no lateral deviation during the fitting process, thereby improving the pre-pressing accuracy; S4, dynamic curvature adjustment and printing: according to the curvature of the label surface, the extension and contraction amount of the electric telescopic rod (7) is adjusted in real time through the control system. When the curvature needs to be increased, the electric telescopic rods (7) on both sides are extended synchronously, and the push rod (16) squeezes the left and right ends of the elastic plate (4), and the middle part of the elastic plate (4) bends downward, driving the arc-shaped printing bending plate (5) to form the target curvature. When the curvature needs to be reduced, the electric telescopic rod (7) is shortened synchronously, and the spring (13) pushes the elastic plate (4) to reset, and the arc-shaped printing bending plate (5) restores the initial curvature; S5, printing completion and equipment reset: After printing is completed, the telescopic cylinder (2) drives the connecting frame (3) to rise and separate from the label surface, the electric telescopic rod (7) returns to its initial shortened state, the elastic plate (4) is completely reset under the action of the spring (13), and the arc printing bending plate (5) returns to its initial curvature; S6. Switching between multiple specifications of labels and recording parameters: If labels with different curvatures need to be printed, repeat steps S2-S5. By adjusting the position and extension of the electric telescopic rod (7) to adapt to the new specifications, the system automatically records the parameters of the electric telescopic rod (7) corresponding to each specification of label, so as to facilitate quick call-up next time.
6. The method for using a label printing machine with adjustable curvature according to claim 5, characterized in that: During the S1 equipment installation and initial debugging step, the thickness of the gasket between the first mounting hole (11) and the second mounting hole (12) is adjusted by adjusting the compression state of the spring (13) so that the initial pre-compression amount of the spring (13) is maintained at 2-3 mm, thereby ensuring that the elastic plate (4) is evenly stressed during the printing process.
7. The method for using a label printing machine with adjustable curvature according to claim 5, characterized in that: In the S4 dynamic curvature adjustment and printing step, if it is necessary to achieve asymmetric curvature of the arc-shaped printing bending plate (5), the extension of the electric telescopic rods (7) on the left and right sides can be adjusted separately through the control system, so that the push rod (16) applies different pressures to the two sides of the elastic plate (4), and the T-shaped rubber structure of the elastic plate (4) realizes the local curvature change of the arc-shaped printing bending plate (5).
8. The method for using a label printing machine with adjustable curvature according to claim 5, characterized in that: In the S6 multi-specification label switching and parameter recording step, the scale lines on the surface of the mounting shaft (6) are recorded to record the position parameters of the connecting sleeve (8) on the mounting shaft (6), which form a corresponding relationship with the elongation parameters of the electric telescopic rod (7) and are stored in the control system. The preset parameters can be directly called when switching to the same specification label next time, and the connecting sleeve (8) and the electric telescopic rod (7) can be automatically adjusted to the target position.