A printing device having a compensation printing function

Abstract

This application relates to a printing apparatus with a compensating printing function, comprising a machine body, a slidable squeegee mounted on the machine body, a screen printing plate disposed between the machine body and the squeegee, and a rotating disk rotatably mounted on the machine body. Two mounting platforms are horizontally mounted on the rotating disk, and two screen printing plates are respectively mounted on the two mounting platforms. The rotation of the rotating disk drives one of the screen printing plates to be positioned between the machine body and the squeegee. This application has the effect of reducing the probability of printing position misalignment during reprinting.

Description

Technical Field

[0001] This application relates to the field of printing equipment, and more particularly to a printing apparatus with a compensating printing function. Background Technology

[0002] Screen printing refers to the process of creating a screen printing plate with images and text using a photosensitive method. Screen printing consists of five main elements: the screen printing plate, the squeegee, the ink, the printing table, and the substrate. It utilizes the basic principle that ink can pass through the mesh openings of the screen printing plate in the image areas, while ink cannot pass through the openings in the non-image areas. During printing, ink is poured into one end of the screen printing plate, and the squeegee applies pressure to the ink areas while moving at a constant speed towards the other end. As it moves, the ink is forced through the mesh openings in the image areas onto the substrate.

[0003] When existing screen printing requires printing patterns with increased color depth in certain areas, it is necessary to first print once using one screen printing plate, and then print again using another screen printing plate with an opening at a specific position to achieve increased color depth. However, recalibration is required when increasing color depth, otherwise it is easy to cause the color deepening position to shift. Summary of the Invention

[0004] In order to reduce the probability of printing position shift during reprinting, this application provides a printing apparatus with a printing compensation function.

[0005] The printing apparatus with compensating printing function provided in this application adopts the following technical solution:

[0006] A printing apparatus with a compensating printing function includes a machine body, a slidable scraper on the machine body, a screen printing plate between the machine body and the scraper, a rotating disk on the machine body, two horizontal mounting platforms on the rotating disk, and two screen printing plates respectively mounted on the two mounting platforms. The rotating disk drives one of the screen printing plates to be positioned between the machine body and the scraper.

[0007] By adopting the above technical solution, the two screen printing plates are interchanged by rotating the rotating disk. After the two screen printing plates are interchanged, since the paper does not move and the position of the printing plate is also specific, there is no need to reposition them, thereby reducing the probability of printing position deviation during reprinting. At the same time, the printing efficiency of reprinting is also improved in conjunction with the machine body.

[0008] Optionally, the mounting platform is rotatably mounted on the rotating disk, and the mounting platform is vertically mounted on the rotating disk by rotation.

[0009] By adopting the above technical solution, the installation platform can be rotated to be set vertically, thus saving storage space.

[0010] Optionally, a torsion spring is provided between the mounting platform and the rotating disk. The torsion spring drives the mounting platform to be horizontally mounted on the rotating disk. A push rod is provided on the machine body. The push rod abuts against the mounting platform outside the machine body and drives the mounting platform to be vertically mounted on the rotating disk.

[0011] By adopting the above technical solution, the push rod is used to drive the mounting platform to rotate on the rotating disk, so that the mounting platform can be driven to rotate to a vertical position when it rotates out of the machine body through the rotating disk, and the torsion spring can quickly reset the mounting platform when it is detached from the push rod.

[0012] Optionally, the rotating disk is provided with a rotating shaft, and the rotating disk is rotatably mounted on the machine body via the rotating shaft. The push rod is slidably mounted on the machine body, and an ejection mechanism is provided on the side of the push rod away from the mounting platform. The ejection mechanism includes a rotating disk and a protrusion. The rotating disk is coaxially mounted on the rotating shaft with the rotating disk. The protrusion is located on the side of the rotating disk facing the mounting platform, and the protrusion drives the push rod to slide towards or away from the mounting platform by rotation.

[0013] By adopting the above technical solution, the ejector mechanism is installed on the rotating shaft and can rotate synchronously when the rotating disk rotates, thereby facilitating the sliding of the ejector rod and allowing the mounting platform to rotate to a vertical state after leaving the machine body.

[0014] Optionally, the machine body is provided with a sliding frame, and a slider is slidably mounted on the sliding frame, with the scraper fixed on the slider.

[0015] By adopting the above technical solution, the sliding frame facilitates the installation of the slider, and the sliding of the slider drives the squeegee to slide for screen printing.

[0016] Optionally, the slider is provided with a discharge mechanism, which includes a rotating tube and a hollow roller. The rotating tube passes through the slider and is rotatably mounted on the slider. The hollow roller is fixed on the rotating tube. A cavity is opened inside the hollow roller. The rotating tube is connected to the cavity. A discharge port is opened on the side wall of the hollow roller. The discharge port is connected to the cavity. A valve is installed at the end of the rotating tube away from the hollow roller.

[0017] By adopting the above technical solution, since the mounting table needs to be rotated, the ink cannot be stored on the screen printing plate. The setting of the discharge mechanism can make the discharge port face downward by rotation, so that the ink can be replenished to the screen printing plate. The hollow roller has the storage capacity to store ink, and the rotating tube can be connected to the ink source to replenish the ink to the hollow roller.

[0018] Optionally, a discharge mechanism is provided on both sides of the scraper sliding direction.

[0019] By adopting the above technical solution, the discharge mechanisms on both sides can scrape ink for printing when the scraper slides in both directions, without the need for resetting, thus improving printing efficiency.

[0020] Optionally, both sets of the discharge mechanism are equipped with drive gears on their rotating tubes, and drive racks are installed on the sliding frame. The drive gears and drive racks mesh with each other, and when the slider slides, it drives the drive gears to slide along the drive racks.

[0021] By adopting the above technical solution, the drive rack and pinion, in conjunction with the drive gear, enables the feeding mechanism to automatically replenish material when the scraper slides, thereby achieving automated printing and improving printing efficiency.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By rotating the rotating disk, the two screen printing plates are interchanged. After the two screen printing plates are interchanged, since the paper does not move and the position of the printing plate is also specific, there is no need to reposition them, thereby reducing the probability of printing position deviation during reprinting. At the same time, the printing efficiency of reprinting is also improved in conjunction with the machine body.

[0024] 2. Rotating the mounting platform to make it vertical can save storage space;

[0025] 3. The push rod is used to drive the mounting platform to rotate on the turntable, so that the mounting platform can be driven to rotate to a vertical position when it rotates out of the machine body through the turntable. The torsion spring can facilitate the quick reset of the mounting platform when it is disengaged from the push rod.

[0026] 4. The ejection mechanism is mounted on the rotating shaft and can rotate synchronously when the rotating disk rotates, which facilitates the sliding of the ejector rod and allows the mounting platform to rotate to a vertical position after leaving the machine body;

[0027] 5. Because the mounting table needs to be rotated, the ink cannot be stored on the screen printing plate. The discharge mechanism is designed so that the discharge port can be turned downward by rotation, which can replenish the ink to the screen printing plate. The hollow roller has storage capacity to store ink, and the rotating tube can be connected to the ink source to replenish the ink to the hollow roller.

[0028] 6. The discharge mechanisms on both sides can scrape ink for printing when the scraper slides in both directions, eliminating the need for resetting and improving printing efficiency;

[0029] 7. The drive rack and pinion, in conjunction with the drive gear, enables the feeding mechanism to automatically replenish material as the scraper slides, thereby achieving automated printing and improving printing efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0031] Figure 2 yes Figure 1 A magnified view of section A in the middle.

[0032] Figure 3 This is a schematic diagram of the overall structure from another perspective of this embodiment.

[0033] Figure 4 yes Figure 3 A magnified view of section B in the middle.

[0034] Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Scraper; 3. Screen printing plate; 4. Rotary disc; 5. Mounting platform; 6. Torsion spring; 7. Push rod; 8. Rotary shaft; 9. Ejection mechanism; 91. Turntable; 92. Protrusion; 10. Sliding frame; 11. Slider; 12. Discharge mechanism; 121. Rotating tube; 122. Hollow roller; 13. Cavity; 14. Discharge port; 15. Valve; 16. Drive gear; 17. Drive rack; 18. Rotating roller; 19. Conveyor belt; 20. Connecting rod; 21. Power source. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] This application discloses a printing apparatus with a compensating printing function, referring to... Figure 1 and Figure 2 The system includes a rectangular body 1 with rotating rollers 18 rotatably mounted at both ends along its length. A conveyor belt 19 is fitted between the two rotating rollers 18 and is driven along the length of the body 1. A scraper 2 slides on the body 1 and slides along the length of the body 1. A screen printing plate 3 is positioned between the body 1 and the scraper 2. The scraper 2 abuts against the screen printing plate 3 on the side facing the body 1, while the screen printing plate 3 abuts against the body 1 at the side facing away from the scraper 2 and is spaced between it and the conveyor belt 19. The height of the conveyor belt 19 is adjustable, and the distance between the conveyor belt 19 and the screen printing plate 3 is adjusted to be the same as the thickness of the product to be printed. A rotating disk 4 is rotatably mounted on the body 1 along its width. Two mounting platforms 5 are horizontally mounted on the rotating disk 4. The rotating disk 4 is located in the middle of one side of the mounting platform 5. When the rotating disk 4 rotates, the positions of the two mounting platforms are interchanged. There are two screen printing plates 3, which are respectively mounted on the two mounting platforms 5. The screen printing plates 3 are detachably mounted on the mounting platforms 5 by bolts. Different patterns are set on the two screen printing plates 3. The rotation of the rotating disk 4 drives one of the screen printing plates 3 to be positioned between the machine body 1 and the squeegee 2. The rotation of the rotating disk 4 interchanges the two screen printing plates 3. After the two screen printing plates 3 are interchanged, since the paper does not move, the position of the printing plate is also specific, so there is no need to reposition it, thereby reducing the probability of printing position deviation during reprinting. At the same time, it also improves the printing efficiency of reprinting in conjunction with the machine body 1.

[0037] Reference Figure 1 and Figure 2The mounting platform 5 is rotatably mounted on the rotating disk 4 via a shaft. The mounting platform 5 is vertically mounted on the rotating disk 4 by rotation, which saves storage space. A torsion spring 6 is installed between the mounting platform 5 and the rotating disk 4. The torsion spring 6 drives the mounting platform 5 to be horizontally mounted on the rotating disk 4. A push rod 7 is installed on the machine body 1. The push rod 7 abuts against the mounting platform 5 outside the machine body 1. Multiple push rods 7 are arranged along the length of the mounting platform 5. The multiple push rods 7 are connected by a connecting rod 20. The arrangement of multiple push rods 7 can drive the mounting platform 5 from multiple points, making the rotation of the mounting platform 5 smoother. The push rod 7 drives the mounting platform 5 to be vertically mounted on the rotating disk 4. The push rod 7 is used to drive the rotation of the mounting platform 5 on the rotating disk 4, which is convenient for the mounting platform 5 to rotate to vertical position when it rotates out of the machine body 1 via the rotating disk 4. The torsion spring 6 can facilitate the quick reset of the mounting platform 5 when it is disengaged from the push rod 7.

[0038] Reference Figure 1 and Figure 2 A rotating shaft 8 is fixed on the rotating disk 4. The rotating disk 4 is rotatably mounted on the machine body 1 via the rotating shaft 8. A power source 21 is installed at the end of the rotating shaft 8 away from the rotating disk 4. In this application, the power source 21 is a motor. The push rod 7 is slidably mounted on the machine body 1. An ejection mechanism 9 is provided on the side of the push rod 7 away from the mounting platform 5. The ejection mechanism 9 includes a rotating disk 91 coaxially mounted on the rotating shaft 8 and a protrusion 92 corresponding to the mounting platform 5, which is located on the side of the rotating disk 91 facing the mounting platform 5. The protrusion 92 drives the push rod 7 to slide closer to or away from the mounting platform 5 by rotation. The protrusion 92 is an arc block. The arc surface of the arc protrusion 92 can gradually drive the push rod 7 to slide, lowering the protrusion 92. The probability of the side wall abutting the top rod 7 being stuck is reduced. When the screen printing plate 3 leaves the machine body 1, the protrusion 92 corresponding to the screen printing plate 3 will abut the top rod 7, causing the top rod 7 to move closer to the mounting table 5, thereby rotating the mounting table 5 to a vertical position, thus saving space. When the corresponding screen printing plate 3 wants to enter the machine body 1, when the rotating disk 4 rotates, the protrusion 92 disengages from the top rod 7, causing the top rod 7 to slide away from the mounting table 5 under the action of gravity. After the mounting table 5 rotates to a horizontal position, it enters the machine body 1. The ejection mechanism 9 is installed on the rotating shaft 8 and can rotate synchronously when the rotating disk 4 rotates, thereby facilitating the sliding of the top rod 7, so that the mounting table 5 rotates to a vertical position after leaving the machine body 1.

[0039] Reference Figure 3 and Figure 4A sliding frame 10 is fixedly installed on the machine body 1. The sliding frame 10 is an inverted U-shaped frame. One end of the sliding frame 10 is fixed to one side of the machine body 1 in the width direction. Sliding blocks 11 are slidably installed on both sides of the sliding frame 10. The sliding blocks 11 on both sides are slid synchronously by rodless cylinders. The two ends of the scraper 2 in the length direction are respectively fixed on the two sliding blocks 11. A discharge mechanism 12 is provided on both sides of the sliding block 11 in the sliding direction of the scraper 2. The discharge mechanism 12 includes a rotating tube 121 that passes through the sliding block 11 and is rotatably installed on the sliding block 11, and a hollow roller 122 fixed on the rotating tube 121. A cavity 13 is opened in the hollow roller 122. The rotating tube 121 is connected to the cavity 13. A discharge port 14 is opened on the side wall of the hollow roller 122. The discharge port 14 is connected to the cavity 13. When the discharge port 14 is facing the screen printing plate 3, the ink in the cavity 13 flows out from the cavity 13. The ink from the discharge port 14 falls onto the screen printing plate 3, and then the ink is printed onto the product surface through the sliding of the squeegee 2. A valve 15 is installed at the end of the rotating tube 121 opposite to the hollow roller 122. The valve 15 is a detachable one-way valve. Since the mounting table 5 needs to be rotated, the ink cannot be stored on the screen printing plate 3. The discharge mechanism 12 is designed so that the discharge port 14 can be rotated downwards, which can replenish the ink to the screen printing plate 3. The hollow roller 122 has a storage capacity to store ink. The rotating tube 121 can be connected to the ink source to replenish the ink to the hollow roller 122. The discharge mechanisms 12 on both sides can scrape the ink for printing when the squeegee 2 slides in both directions. No reset is required, which improves the printing efficiency. Different colors of ink can also be placed in the two sets of discharge mechanisms 12 for printing two-color patterns.

[0040] Reference Figure 3 and Figure 4 Both sets of discharge mechanisms 12 are equipped with drive gears 16 on their rotating tubes 121, and drive racks 17 are installed on the sliding frame 10. The drive gears 16 and drive racks 17 mesh with each other. When the slider 11 slides, it drives the drive gears 16 to slide along the drive racks 17. The drive racks 17 cooperate with the drive gears 16 to enable the discharge mechanism 12 to automatically replenish material when the scraper 2 slides, thereby realizing automated printing and improving printing efficiency.

[0041] The implementation principle of this application embodiment is as follows: Adjust the height of the conveyor belt 19 according to the required product thickness, select two screen printing plates 3 with the required printing pattern, and install the screen printing plates 3 on the mounting platform 5 respectively. Then, according to the printing sequence, rotate one of the screen printing plates 3 into the machine body 1. The product to be printed is conveyed to the bottom of the screen printing plate 3 by the conveyor belt 19. Then stop the conveying and drive the squeegee 2 to slide. During this period, the squeegee 2 slides in the direction of the discharge port 14 of the discharge mechanism 12 to discharge the ink. The squeegee 2 scrapes the ink on the screen printing plate 3 and prints it on the product surface through the screen printing plate 3. Then drive the rotating disk 4 to rotate. When the screen printing plate 3 is replaced, the squeegee 2 slides in the opposite direction, so that the ink is discharged from the discharge port 14 of the discharge mechanism 12 on the other side. The squeegee 2 scrapes the ink on the replaced screen printing plate 3 and prints it on the product surface again through the replaced screen printing plate 3, completing two printings on the same product.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A printing apparatus with a compensating printing function, comprising a body (1), a scraper (2) slidably disposed on the body (1), and a screen printing plate (3) disposed between the body (1) and the scraper (2), characterized in that: A rotating disk (4) is mounted on the machine body (1). Two mounting platforms (5) are horizontally mounted on the rotating disk (4). There are two screen printing plates (3) and they are mounted on the two mounting platforms (5) respectively. The rotating disk (4) drives one of the screen printing plates (3) to be placed between the machine body (1) and the scraper (2). A sliding frame (10) is provided on the body (1), and a slider (11) is slidably provided on the sliding frame (10). The scraper (2) is fixed on the slider (11). A discharge mechanism (12) is provided on the slider (11). The discharge mechanism (12) includes a rotating tube (121) and a hollow roller (122). The rotating tube (121) passes through the slider (11) and is rotatably mounted on the slider (11). The hollow roller (122) is fixed on the rotating tube (121). A cavity (13) is opened inside the hollow roller (122). The rotating tube (121) is connected to the cavity (13). A discharge port (14) is opened on the side wall of the hollow roller (122). The discharge port (14) is connected to the cavity (13). A valve (15) is installed at the end of the rotating tube (121) away from the hollow roller (122). The scraper (2) is equipped with a discharge mechanism (12) on both sides of the sliding direction; Both sets of discharge mechanisms (12) are equipped with drive gears (16) on the rotating tubes (121) and drive racks (17) are installed on the sliding frame (10). The drive gears (16) and drive racks (17) mesh with each other. When the slider (11) slides, it drives the drive gears (16) to slide along the drive racks (17). The mounting platform (5) is rotatably mounted on the rotating disk (4); A torsion spring (6) is provided between the mounting platform (5) and the rotating disk (4). The torsion spring (6) drives the mounting platform (5) to be horizontally mounted on the rotating disk (4). A push rod (7) is provided on the machine body (1). The push rod (7) abuts against the mounting platform (5) outside the machine body (1). The push rod (7) drives the mounting platform (5) to be vertically mounted on the rotating disk (4). A rotating shaft (8) is provided on the rotating disk (4). The rotating disk (4) is rotatably mounted on the machine body (1) via the rotating shaft (8). The push rod (7) is slidably mounted on the machine body (1). An ejection mechanism (9) is provided on the side of the push rod (7) away from the mounting table (5). The ejection mechanism (9) includes a rotating disk (91) and a protrusion (92). The rotating disk (91) is coaxially mounted on the rotating shaft (8) with the rotating disk (4). The protrusion (92) is located on the side of the rotating disk (91) facing the mounting table (5). The protrusion (92) drives the push rod (7) to slide towards or away from the mounting table (5) by rotation. When the screen printing plate (3) leaves the machine body (1), the protrusion (92) corresponding to the screen printing plate (3) will abut against the top rod (7), causing the top rod (7) to approach the mounting table (5), thereby causing the mounting table (5) to rotate to a vertical state. When the corresponding screen printing plate (3) is about to enter the machine body (1), the protrusion (92) will disengage from the top rod (7) when the rotating disk (4) rotates, causing the top rod (7) to slide away from the mounting table (5) under the action of gravity. After the mounting table (5) rotates to a horizontal state, it enters the machine body (1).

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