Printing and coating assembly and printing and coating device

Abstract

The printing and coating assembly comprises a guiding and positioning device and a printing and coating part, and a containing space used for limiting a welding lug is formed in the guiding and positioning device in a sunken mode; a glue circulating path is arranged in the printing and coating part, a glue inlet and a glue outlet are formed in the printing and coating part by the glue circulating path, and a soft felt is connected to the glue outlet; the soft felt and the containing space are correspondingly arranged, and the guiding and positioning device and the printing and coating part can move in the face-to-face or back-to-back mode. By means of the guiding and positioning device, the containing space in the guiding and positioning device can accurately guide the position of the welding lug, and the soft felt and the containing space are correspondingly arranged, so that the soft felt can be accurately aligned with the position of a crator. The soft felt connected to the glue outlet can evenly coat the welding scars on the inner wall of the tank body with glue, the soft felt can adapt to tiny unevenness of the surface of the tank body due to the softness and elasticity of the soft felt, the glue can fully permeate the welding scars, and therefore the anti-rust effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing and coating devices, in particular to a printing and coating assembly and a printing and coating device. BACKGROUND

[0002] In the manufacturing process of metal packaging containers, the welding of the can body lug is a crucial link. However, due to high temperature during the welding process, the original protective film on the inner wall of the can body is often damaged, and welding scars are formed in the welding area. These welding scars not only damage the integrity of the inner wall of the can body, but also may become a hidden trouble for rusting in the future. In order to prolong the service life of the product and maintain good appearance quality, manufacturers usually add a process of printing and coating protective glue after welding. The main purpose of this process is to form a protective film on the inner wall of the can body to isolate air and moisture and prevent rusting of metal materials such as tinplate.

[0003] However, in the actual production process, due to the handling work of the production line and the running characteristics of the equipment, the can body after welding may be rotated or deviated by a small angle before entering the printing and coating station. Although the deviation is not large, it is enough to affect the accuracy of the printing and coating position. In the traditional production process, although color mark sensors are used to sense the position of the can body and adjust it to the correct position through the rotation of the tray assembly, small angle deviations may still occur during subsequent handling and tray assembly lifting. This deviation will cause inaccurate printing and coating position, so that the protective glue cannot completely cover the welding scars, thereby reducing the rust prevention effect.

[0004] In order to solve this problem, the prior art needs a device that can ensure the accurate position of the can body before printing and coating. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a printing and coating assembly and a printing and coating device which can ensure the accuracy of the printing and coating position, so that the protective glue can completely cover the welding scars, thereby improving the rust prevention performance and overall quality of the product.

[0006] The above-mentioned purpose of the present application is achieved by the following technical solutions:

[0007] A printing and coating assembly comprises a guide positioning device and a printing and coating part, wherein the guide positioning device is provided with a recess forming a containing space for limiting the lug; the printing and coating part is provided with a glue flow path, the glue flow path forms a glue inlet and a glue outlet on the printing and coating part, and the glue outlet is connected with a soft fur; the soft fur and the containing space are correspondingly arranged, and the guide positioning device and the printing and coating part can move towards or away from each other.

[0008] The application is further provided that the guiding and positioning device comprises a positioning working cylinder and a positioning guide head, the accommodating space is arranged on the positioning guide head, and the positioning guide head is connected with the positioning working cylinder.

[0009] The application is further provided that the printing and coating part comprises a printing and coating cylinder and a printing and coating head, the glue flow path is arranged on the printing and coating head, the soft fur is arranged on the printing and coating head, and the printing and coating head is connected with the printing and coating cylinder.

[0010] The application is further provided that an elastic member is arranged between the printing and coating head and the printing and coating cylinder.

[0011] The application is further provided that the soft fur is arranged on one end of the printing and coating head, and the one end of the printing and coating head is in a circular arc shape.

[0012] The application is further provided that the size of the soft fur is greater than the size of the welding lug.

[0013] The printing and coating device comprises the printing and coating assembly, the number of the printing and coating assembly is two, and the two printing and coating assemblies are arranged corresponding to the two welding lugs on the can body.

[0014] The application is further provided that the printing and coating device further comprises a fixing frame, and the two printing and coating assemblies are connected with the fixing frame.

[0015] The application is further provided that the printing and coating device further comprises a tray assembly and a color mark sensor, the color mark sensor is arranged at the front end of the printing and coating assembly, the tray assembly moves between the color mark sensor and the printing and coating assembly, the tray assembly can rotate around its own axis, and the tray assembly and the color mark sensor are electrically connected.

[0016] In summary, the application has the following beneficial technical effects:

[0017] 1. The guiding and positioning device is arranged, the accommodating space in the guiding and positioning device can accurately guide the position of the welding lug, the soft fur and the accommodating space are arranged corresponding to each other, the soft fur can accurately align the welding scar position, and the accuracy and consistency of printing and coating are improved.

[0018] 2. The soft fur connected with the glue outlet can uniformly coat the glue on the welding scar on the inner wall of the can body, the softness and elasticity of the soft fur can adapt to the slight unevenness of the surface of the can body, the glue can fully penetrate the welding scar, and the rust prevention effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a first perspective view of the printing and coating device before printing and coating.

[0020] Figure 2 is a first view cross-sectional schematic diagram of the printing and coating device during printing and coating.

[0021] Figure 3 is a second view cross-sectional schematic diagram of the printing and coating device before printing and coating.

[0022] Figure 4 is a second view cross-sectional schematic diagram of the printing and coating device during printing and coating.

[0023] Figure 5 is a schematic diagram of a can body cross-section.

[0024] Figure 6 is a schematic diagram of a glue printing misalignment state one.

[0025] Figure 7 is a schematic diagram of a glue printing misalignment state two.

[0026] Figure 8 is a schematic diagram of the printing and coating device.

[0027] Figure 9 is a schematic diagram of the tray assembly.

[0028] BRIEF DESCRIPTION OF DRAWINGS 1, a guide positioning device; 11, a containing space; 12, a positioning working cylinder; 13, a positioning guide head; 2, a printing and coating part; 21, a glue flow path; 211, a glue inlet; 212, a glue outlet; 22, a soft felt; 23, a printing and coating cylinder; 24, a printing and coating head; 25, an elastic member; 3, a fixing frame; 4, a color mark sensor; 5, a tray assembly; A, a can body; A1, a lug; A2, a welding scar; A3, a glue printing. DETAILED DESCRIPTION

[0029] The application will be further described in detail below with reference to the accompanying drawings.

[0030] A printing and coating assembly includes a guide positioning device 1 and a printing and coating part 2. The guide positioning device 1 is provided with a recess forming a containing space 11 for defining a lug A1. The printing and coating part 2 is provided with a glue flow path 21 forming a glue inlet 211 and a glue outlet 212 on the printing and coating part 2, and the glue outlet 212 is connected with a soft felt 22. The soft felt 22 and the containing space 11 are correspondingly arranged, and the guide positioning device 1 and the printing and coating part 2 can move towards or away from each other.

[0031] The accommodation space 11 in the guiding positioning device 1 of each printing assembly can accurately define the position of the lug A1. During the printing process, the guiding positioning device 1 works first to ensure that the lug A1 is accurately positioned in the accommodation space 11. Subsequently, the printing part 2 delivers glue to the glue outlet 212 through the glue flow path 21 and uniformly coats the lug A1 via the soft felt 22. This design not only improves the accuracy of coating, but also significantly improves work efficiency.

[0032] In a preferred embodiment, as shown in Figures 1-4 A printing device is provided for cans with two lugs A1. The printing device has two printing assemblies, each located on the side of the can body A. Each guiding positioning device 1 is equipped with a concave accommodation space 11 for accurately defining and guiding the lug A1 on the can body A. When the can body A is transported to the printing position, the two guiding positioning devices 1 approach from both sides of the can body A and gently clamp the lugs A1. Since the lugs A1 protrude from the surface of the can body A, the accommodation space 11 of the guiding positioning device 1 can closely match the shape of the lug A1, thereby achieving accurate guiding positioning. Once the lug A1 is correctly guided, the printing part 2 starts working. The glue flow path 21 in the printing part 2 delivers glue to the glue outlet 212 and uniformly coats the lug A1 via the connected soft felt 22. Since the guiding positioning device 1 has ensured the accurate position of the lug A1, the printing part 2 can accurately complete the glue coating work. This design not only improves the accuracy and efficiency of glue coating, but also ensures the stability of the can body A during the printing process. In addition, since the guiding positioning device 1 and the printing part 2 work independently, the printing device can also adapt to different sizes and shapes of can bodies A, improving its versatility and flexibility.

[0033] In another preferred embodiment, the guiding positioning device 1 is located on the outside of the can body A, while the printing and coating part 2 is located on the inside of the can body A. When the can body A is transported to the printing and coating station, the guiding positioning device 1 approaches from the outside of the can body A, while the printing and coating part 2 moves synchronously from the inside of the can body A. The guiding positioning device 1 tightly fits the lug A1 through the accommodation space 11 formed by the recess. The printing and coating part 2 cooperates with the guiding positioning device 1 to jointly clamp the can body A, so that the lug A1 smoothly enters the accommodation space 11 and is guided. After the lug A1 is correctly guided, the printing and coating part 2 starts to work. The glue flow path 21 in the printing and coating part 2 transports glue to the glue outlet 212 and uniformly applies the glue on the lug A1 through the soft felt 22. Due to the close cooperation between the guiding positioning device 1 and the printing and coating part 2, the printing and coating device can ensure the stability and accuracy of the lug A1 during the glue coating process. The design of the inside and outside clamping also enables the printing and coating device to more closely fit the surface of the can body A, reducing glue waste and pollution during the glue coating process. At the same time, this method is suitable for single-lug A1 or multi-lug A1 glue coating.

[0034] The present application can ensure that the glue is uniformly and finely coated on the surface of the lug A1 through the direct contact between the soft felt 22 and the lug A1. At the same time, the softness and elasticity of the soft felt 22 enable it to adapt to the slight unevenness of the lug A1 surface, further improving the coating quality.

[0035] The present application can significantly improve production efficiency through an automatic or semi-automatic printing and coating process. At the same time, due to the high coating quality and easy operation, the device can also reduce production costs and waste rates, bringing greater economic benefits to enterprises.

[0036] Specifically, the guiding positioning device includes a positioning working cylinder 12 and a positioning guide head 13, and the accommodation space 11 is arranged on the positioning guide head 13, and the positioning guide head 13 is connected with the positioning working cylinder 12.

[0037] Further, the printing and coating part 2 includes a printing and coating cylinder 23 and a printing and coating head 24, the glue flow path 21 is arranged on the printing and coating head 24, the soft felt 22 is installed on the printing and coating head 24, and the printing and coating head 24 is connected with the printing and coating cylinder 23. An elastic member 25 is arranged between the printing and coating head 24 and the printing and coating cylinder 23.

[0038] Further, the soft felt 22 is wrapped on one end of the printing and coating head 24, and one end of the printing and coating head 24 is in a circular arc shape.

[0039] Further, the size of the soft felt 22 is greater than the size of the lug A1.

[0040] The guiding positioning device drives the positioning guide head 13 through the positioning working cylinder 12, tightly adheres to the lug A1 by the accommodating space 11, and realizes high-precision positioning and guiding. This design ensures the accurate position of the lug A1 before gluing, and provides a solid foundation for subsequent gluing operations.

[0041] The printing and coating part 2 is driven by the printing and coating cylinder 23 to move the printing and coating head 24. The glue uniformly flows out through the glue flow path 21 on the printing and coating head 24 and is applied to the lug A1 by the soft felt 22. The softness and elasticity of the soft felt 22 can adapt to the slight unevenness of the surface of the lug A1, ensure uniform coverage of the glue, and realize stable and reliable gluing effect.

[0042] The elastic member 25, preferably a spring, is arranged between the printing and coating head 24 and the printing and coating cylinder 23, which can provide a certain buffering effect for the printing and coating head 24 during gluing, preventing damage to the lug A1 or the printing and coating head 24 due to excessive pressure. At the same time, this design also helps to improve the uniformity and consistency of gluing.

[0043] The soft felt 22 is wrapped around one end of the printing and coating head 24, and one end of the printing and coating head 24 is arc-shaped. This design makes the soft felt 22 adhere to the inner wall of the can body and has a larger contact area with the lug A1, which can more comprehensively apply glue and improve gluing efficiency. At the same time, the arc-shaped printing and coating head 24 is also easier to adapt to the shape of the lug A1, ensuring the accuracy and uniformity of gluing.

[0044] The size of the soft felt 22 is larger than the size of the lug A1, which ensures that the lug A1 can be completely covered during gluing, avoiding the problem of missed gluing. This design helps to improve the integrity and quality of gluing.

[0045] Since the weld scar A2 is generated by the lug A1 on the can body A, the guiding positioning device is used to accurately coat the lug A1 to achieve accurate coating of the weld scar A2. At this time, the glue printing A3 completely covers the weld scar A2, and the accurate coating effect is as shown in Figure 5 , Figure 5 is a view of the can body A along the axis after being cut,

[0046] In the traditional production process, the can body A may have a small angle deviation during handling and lifting by the tray assembly 5. This deviation will cause inaccurate printing and coating position, as shown in Figures 6-7 , Figure 6 and Figure 7 are partial schematic views of the misaligned state of the glue printing A3 and the weld scar A2 of the can body A. At this time, the glue printing A3 cannot completely cover the weld scar A2, thereby reducing the rust prevention effect.

[0047] Further, the printing and coating device further comprises a fixed frame 3, and the two printing and coating assemblies are connected to the fixed frame 3.

[0048] The fixed frame 3 provides a stable support platform for the printing assembly, making the entire printing device more stable during operation. This helps to reduce uneven glue application or inaccurate positioning caused by vibration or shaking, improving the accuracy and reliability of the glue application process.

[0049] As Figures 8-9 , the printing device also includes a tray assembly 5 and a color mark sensor 4, which is located at the front end of the printing assembly. The tray assembly 5 moves between the color mark sensor 4 and the printing assembly, and can rotate around its own axis. The tray assembly 5 and the color mark sensor 4 are electrically connected.

[0050] The color mark sensor 4 can identify the position of the lug A1, and the tray assembly 5 can support the can body A and rotate around its own axis. They are connected by electricity. The tray assembly 5 supports the can body A and rotates, and when the color mark sensor 4 identifies the lug A1, the tray assembly 5 stops rotating. Then the tray assembly 5 transports the can body A to the glue application station, and the printing assembly performs the glue application process. The color mark sensor 4 and the tray assembly 5 provide pre-positioning for the subsequent glue application process, so that the approximate orientation of the guide positioning device and the lug A1 is aligned, facilitating its alignment and improving the accuracy and consistency of the glue application process.

[0051] As Figure 9 shown, the tray is designed with a rotating structure, with a rotating shaft installed at the center of the bottom. The rotating shaft is connected to a driving device, such as a motor or air cylinder. When the tray needs to be rotated, the driving device is started, and the tray is rotated around its own axis through the rotating shaft. This design allows the tray to adjust the angle flexibly to adapt to different sizes and shapes of the can body A, ensuring that the lug A1 can be accurately aligned to the glue application position of the printing assembly.

[0052] The bottom of the tray assembly 5 is equipped with a moving device, such as a roller or guide rail, allowing the tray to move freely in the horizontal direction.

[0053] The design of the tray assembly 5 fully considers the diversity of the shape and size of the can body A. The bottom is equipped with a rotating mechanism, allowing the tray to rotate freely around its own axis. When the can body A is placed on the tray, the tray adjusts the angle of the can body A through rotation, ensuring that the lug A1 can be accurately faced towards the color mark sensor 4.

[0054] The color mark sensor 4 is the core component of the pre-positioning process, and its responsibility is to accurately identify the lug A1 position of the can body A on the tray. When the tray assembly 5 supports the can body A and rotates to the position below the color mark sensor 4, the sensor will immediately start and accurately identify the lug A1. Once the identification is successful, the sensor will immediately send a signal to the control system, indicating that the tray assembly 5 should stop rotating.

[0055] After the color sensor 4 successfully identifies the lug A1, the tray assembly 5 will transport the can body A smoothly to the gluing station according to the instructions of the control system. At this time, the printing and coating assembly is ready for gluing operation. Due to the accuracy of the pre-positioning process, the guide positioning device can easily align the approximate orientation of the lug A1, further guide the can body A, and ensure the smooth progress of the gluing operation.

[0056] The device realizes the accurate pre-positioning of the lug A1 by introducing the tray assembly 5 and the color sensor 4. Not only improves the accuracy and consistency of the gluing operation, but also significantly improves the automation level of the production line. At the same time, due to the flexibility of the tray assembly 5 and the high-precision recognition ability of the color sensor 4, the printing and coating device can easily cope with different sizes and shapes of can bodies A, showing strong adaptability and flexibility.

[0057] The electrical connection between the tray assembly 5 and the color sensor 4 is to ensure that they can work together to realize the pre-positioning of the lug A1. This electrical connection can adopt the connection mode of signal lines, which are mainly used to transmit the signals generated after the color sensor 4 identifies the position of the lug A1. When the color sensor 4 successfully identifies the lug A1, it will send an electrical signal to the control system through the signal line, indicating that the tray stops rotating and transports the can body A to the gluing station. One end of the signal line is connected to the signal output port of the color sensor 4, and the other end is connected to the signal receiving device on the tray assembly 5, such as a signal processor or a controller. It is realized through a plug-in connector, which is convenient for disassembly and maintenance.

[0058] The output signal of the color sensor 4 is usually a digital signal, which can adopt NPN or PNP type.

[0059] The embodiments of the specific embodiment are the preferred embodiments of the utility model, which do not limit the protection scope of the utility model, so: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. An inking assembly characterized by, The utility model relates to a kind of printing and coating assembly, including: guide positioning device (1), recess is formed in the guide positioning device (1) and is used to define the accommodation space (11) of lug (A1);Printing and coating part (2), glue flow path (21) is equipped in the printing and coating part (2), glue inlet (211) and glue outlet (212) are formed on the printing and coating part (2) by glue flow path (21), glue outlet (212) is connected with soft fur (22);Wherein, the soft fur (22) and the accommodation space (11) are correspondingly arranged, and the guide positioning device (1) and the printing and coating part (2) can move towards or away from each other. The guide positioning device includes a positioning working cylinder (12) and a positioning guide head (13), the accommodation space (11) is provided on the positioning guide head (13), and the positioning guide head (13) is connected with the positioning working cylinder (12). The printing and coating part (2) includes a printing and coating cylinder (23) and a printing and coating head (24), the glue flow path (21) is opened on the printing and coating head (24), the soft fur (22) is installed on the printing and coating head (24), and the printing and coating head (24) is connected with the printing and coating cylinder (23). An elastic member (25) is arranged between the printing and coating head (24) and the printing and coating cylinder (23).

2. The print assembly of claim 1, wherein, The soft fur (22) is wrapped on one end of the printing and coating head (24), and one end of the printing and coating head (24) is in the shape of a circular arc.

3. The print assembly of claim 1, wherein, The size of the soft fur (22) is greater than the size of the lug (A1).

4. The print assembly of claim 3, wherein, The printing and coating assembly includes any one of claims 1-6, and the number of the printing and coating assembly is two, and the two printing and coating assemblies are arranged corresponding to the two lugs (A1) on the can body (A).

5. The print assembly of claim 3, wherein, A fixing frame (3) is further included, and the two printing and coating assemblies are connected with the fixing frame (3).

6. The print assembly of claim 5, wherein, A tray assembly (5) and a color mark sensor (4) are further included, the color mark sensor (4) is arranged at the front end of the printing and coating assembly, the tray assembly (5) moves between the color mark sensor (4) and the printing and coating assembly, the tray assembly can rotate around its axis, and the tray assembly and the color mark sensor (4) are electrically connected.

7. An inking device characterized by comprising: ​ 8. The pad printing apparatus according to claim 7, characterized in that ​ 9. The pad printing apparatus according to claim 7, wherein ​

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