Double-sided dot printing process

Abstract

This application discloses a double-sided fixed-point printing process, relating to the field of printing machine technology. The application includes the following steps: S1, holding the garment to be printed between two heat transfer papers; S2, opening the printing machine and placing the heat transfer papers and garment together onto the transport section of the printing machine; S3, a fixing component is provided inside the printing machine. After the transport section transports the heat transfer papers and garment into the printing machine, the fixing component presses down on the periphery of the heat transfer papers. This application, by providing a fixing component and a transport section on the printing machine, uses the transport section to time the fixing component. When the transport section carries the heat transfer papers and garment back into the printing machine, the fixing component presses down on the edges of the heat transfer papers, preventing fabric shifting during printing, ensuring the integrity of the pattern during printing, and improving the quality of composite printing on the fabric.

Description

Technical Field

[0001] This application relates to the field of printing machine technology, specifically to double-sided fixed-dot printing process. Background Technology

[0002] In actual fabric processing, to achieve better aesthetics, fabrics are often printed. Printing is a process of applying patterns to textiles using dyes or pigments. Because it involves overall processing efficiency, a good textile printing device is particularly important. Currently, when printing on clothing, double-sided printing machines are used to print on both sides of the garment.

[0003] Existing double-sided printing machines sandwich the garment to be printed between two patterned heat transfer papers during printing, and then place the heat transfer papers and garment into the printing machine together for printing. During the process, the edges of the heat transfer papers are prone to warping. When the print head of the printing machine moves over them, it is easy to lift the heat transfer paper through the warped sides, which may result in incomplete printing patterns. To address this issue, this application provides a double-sided fixed-point printing process. Summary of the Invention

[0004] The purpose of this application is to address the problem that existing double-sided printing machines, when printing, sandwich the garment to be printed between two patterned heat transfer papers and place them together into the printing machine, often result in the heat transfer papers warping along their edges. When the print head moves over these warped edges, the warped paper can be easily lifted, leading to incomplete printing. This application provides a double-sided fixed-point printing process.

[0005] To achieve the above objectives, this application specifically adopts the following technical solution:

[0006] Double-sided dot-matrix printing process includes the following steps:

[0007] S1. The garment to be printed is sandwiched between two heat transfer sheets;

[0008] S2. Turn on the printing machine and place the heat transfer paper and the garment onto the printing machine for transport.

[0009] S3. After the heat transfer paper and the garment are transported into the printing machine, the periphery of the heat transfer paper is pressed inside the printing machine.

[0010] S4. Start the printing machine so that it begins printing on the garment;

[0011] The printing machine includes a housing, on which a printing cavity is formed, and a printing head is installed inside the printing cavity. It also includes:

[0012] The support plate is used to support the heat transfer paper;

[0013] The pressing members installed on both sides of the support plate are used to press the two sides of the heat transfer paper.

[0014] A transport component installed inside the printing cavity, the transport component being connected to the support plate, the transport component being used to move the support plate within the printing cavity;

[0015] A fixing member installed inside the printing cavity is connected to the transport member. When the transport member moves the carrier plate into the printing cavity, the transport member causes the fixing member to press the other two sides of the heat transfer paper.

[0016] Furthermore, the pressure-holding member includes:

[0017] A sliding groove formed on the support plate;

[0018] A pressure block is installed in the sliding groove. A sliding rod is installed on the pressure block. The sliding rod slides in conjunction with the sliding groove. The pressure block is connected to the sliding groove through the sliding rod. The pressure block is used to hold the heat transfer paper.

[0019] Furthermore, the fastener includes:

[0020] A mounting frame connected to the transport component is symmetrically mounted on both sides of the support plate. The mounting frame has a receiving cavity, the opening direction of which is perpendicular to the mounting direction of the pressure block.

[0021] Rotate the pressure roller installed in the mounting frame, the pressure roller being used to press the heat transfer paper.

[0022] Furthermore, a guide groove is provided inside the printing cavity, and the supporting plate is slidably engaged with the guide groove. The transport component includes:

[0023] An air pump installed inside the printing chamber, the air pump having two air outlet pipes;

[0024] A corrugated pipe connected to one of the air outlet pipes, the corrugated pipe being connected to the support plate;

[0025] Two connecting pipes are connected to another air outlet pipe, and sleeves are installed on the connecting pipes. A sliding rod that slides with the sleeve is installed on the mounting frame.

[0026] When one of the air outlet pipes is in the air outlet state, the other air outlet pipe is in the air inlet state.

[0027] Furthermore, an extension plate is installed on the outer shell, which is used to support the carrier plate outside the printing cavity. Sliding sleeves are installed on both sides of the extension plate, and side plates are slidably installed inside the sliding sleeves. A rotating roller is rotatably installed between the side plates. An inclined surface is provided on the carrier plate to guide the rotating roller, and the lowest point of the rotating roller is in contact with the heat transfer paper.

[0028] Furthermore, a rod is installed on the upper surface of the support plate, and an insertion hole is provided on the side of the pressure block that contacts the upper surface of the support plate. When the rod is inserted into the insertion hole, the rotation of the pressure block is restricted.

[0029] Furthermore, a limiting plate is installed inside the printing cavity, and a sliding cavity is formed on the limiting plate. The sliding rod slides in conjunction with the sliding cavity, and a guide block is installed inside the sliding cavity. An inner groove for accommodating the guide block is formed on the side wall of the sliding rod.

[0030] Furthermore, a slider is installed at the bottom of the support plate, and the support plate is slidably installed in the guide groove via the slider. A pulley is rotatably installed in the guide groove, and the pulley is in rolling cooperation with the slider.

[0031] Furthermore, a groove is provided inside the printing cavity, the support plate is installed in the groove, and the guide groove is provided inside the groove, so that the upper surface of the support plate is flush with the bottom surface inside the printing cavity.

[0032] The beneficial effects of this application are as follows:

[0033] 1. This application provides a fixing component and a transport component on the printing machine. The transport component drives the fixing component at a time. When the transport component carries the heat transfer paper and the garment back into the printing machine, the fixing component presses the edge of the heat transfer paper, reducing the possibility of warping along the edge of the heat transfer paper. This reduces the possibility of the heat transfer paper separating from the garment during printing and reduces the possibility of affecting the printed pattern.

[0034] 2. This application uses a transport component to drive the fixing component and the carrier plate together. During use, when the carrier plate returns to the printing cavity, the fixing component can fix the edge of the heat transfer paper in time, reducing the possibility of the heat transfer paper separating from the clothing during printing.

[0035] 3. The pressing plate of this application is movably mounted on the carrier plate through a sliding rod and a sliding groove, which can conveniently press the two edges of the heat transfer paper, thus improving the convenience of pressing the heat transfer paper. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of this application;

[0037] Figure 2 This is an exploded view of part of the structure of this application;

[0038] Figure 3 This is a schematic diagram of the load-bearing plate structure of this application;

[0039] Figure 4 This is a schematic diagram of the fastener structure of this application;

[0040] Figure 5 This application Figure 1 Medium solid sectional view;

[0041] Figure 6 This application Figure 2 Enlarged view of point A in the middle;

[0042] Figure 7 This is a schematic diagram of the steps in this application;

[0043] Reference numerals: 1. Outer shell; 2. Printing cavity; 3. Printing head; 4. Support plate; 5. Transport component; 501. Air pump; 502. Air outlet pipe; 503. Corrugated pipe; 504. Connecting pipe; 505. Sleeve; 6. Holding component; 601. Sliding groove; 602. Pressing block; 603. Sliding rod; 7. Fixing component; 701. Mounting frame; 702. Receiving cavity; 703. Pressure roller; 704. Sliding rod; 8. Guide groove; 9. Extension plate; 10. Sliding sleeve; 11. Side plate; 12. Rotating roller; 13. Inclined surface; 14. Insert rod; 15. Insertion hole; 16. Limiting plate; 17. Sliding cavity; 18. Guide block; 19. Inner groove; 20. Sliding block; 21. Pulley; 22. Groove; 23. Arc groove. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0045] like Figure 1 and Figure 7 As shown, one embodiment of this application proposes a double-sided dot-matrix printing process, which includes the following steps:

[0046] S1. Hold the garment to be printed between two heat transfer papers and pre-print the pattern onto the heat transfer paper to prepare for printing.

[0047] S2. Turn on the printing machine and place the heat transfer paper and the garment on the printing machine for transport. The printing machine itself transports the heat transfer paper and garment into the printing machine, reducing the impact of other forces on the two and reducing the possibility of them scattering during the process of placing them into the printing machine.

[0048] S3. When the heat transfer paper and the garment are transported into the printing machine, the periphery of the heat transfer paper is pressed inside the printing machine. At the same time as the heat transfer paper and the garment are transported into the printing machine, the edges of the heat transfer paper are pressed and fixed inside the printing machine (the area of ​​the heat transfer paper is larger than the area of ​​the garment during printing), thereby fixing the heat transfer paper and the garment.

[0049] S4. Start the printing machine to begin printing on the garment. During printing, the heat transfer paper is pressed and fixed to the garment, reducing the possibility of the heat transfer paper separating from the garment during printing and minimizing the impact on the printed pattern.

[0050] The printing machine includes a housing 1, a printing cavity 2 constructed on the housing 1, and a printing head 3 installed inside the printing cavity 2. It is a conventional heat transfer printing machine. Heat transfer paper and clothing are placed into the printing cavity 2, and the pattern on the heat transfer paper is printed onto the clothing by heating the printing head 3. The machine also includes:

[0051] The carrier plate 4 is used to support the heat transfer paper. The carrier plate 4 is U-shaped. The middle part is used to support the heat transfer paper and the clothing. The parallel sides are used to block the heat transfer paper and the clothing on both sides. The part of the carrier plate 4 with the edge opening is used for the printing head 3 to move and print on the clothing.

[0052] The pressing members 6 installed on both sides of the carrier plate 4 are used to press the sides of the heat transfer paper. When the carrier plate 4 is located outside the outer shell 1, the heat transfer paper and clothing are placed on the carrier plate 4. The pressing members 6 are used to press the sides of the heat transfer paper and clothing.

[0053] The transport component 5 is installed inside the printing cavity 2 and is connected to the carrier plate 4. The transport component 5 is used to move the carrier plate 4 inside the printing cavity 2. With the cooperation of the transport component 5, the carrier plate 4 can slide inside the printing cavity 2. When printing is required, the carrier plate 4 moves to the outside of the printing cavity 2 with the cooperation of the transport component 5. After the heat transfer paper and the garment are placed on it, they are initially fixed with the cooperation of the holding component 6. Then, with the cooperation of the transport component 5, the carrier plate 4 returns to the printing cavity 2 for printing.

[0054] The fixing member 7 is installed in the printing cavity 2 and is connected to the transport member 5. When the transport member 5 moves the carrier plate 4 into the printing cavity 2, the transport member 5 causes the fixing member 7 to press the other two sides of the heat transfer paper. When the transport member 5 moves the carrier plate 4 back into the printing cavity 2, it also drives the fixing member 7 to move, so that the fixing member 7 also moves closer to the carrier plate 4. By pressing the other two sides of the heat transfer paper through the fixing member 7, the fixing effect of the heat transfer paper and the clothing is increased, thereby reducing the possibility of the heat transfer paper separating from the clothing during printing, increasing the accuracy of the printed pattern, improving the printing effect, and reducing the waste of ink on the heat transfer paper, thereby reducing the generation of waste ink.

[0055] Compared with existing technologies, during use, the heat transfer paper is pressed and fixed to the clothing by the fixing member 7 and the pressing member 6 during printing, which reduces the possibility of the heat transfer paper separating from the clothing during printing, and thus reduces the possibility of errors in the printed pattern.

[0056] like Figure 2 , Figure 3 and Figure 6 As shown, in some embodiments, the pressure-holding member 6 includes:

[0057] The sliding groove 601 formed on the bearing plate 4, so as to Figure 1 From the main perspective, the sliding groove 601 is opened along the vertical direction;

[0058] A pressure block 602 is installed in the sliding groove 601. A sliding rod 603 is installed on the pressure block 602. The sliding rod 603 slides in conjunction with the sliding groove 601. The pressure block 602 is connected to the sliding groove 601 through the sliding rod 603. The pressure block 602 is used to hold the heat transfer paper. The sliding rod 603 can rotate and slide within the sliding groove 601. Normally, the pressure block 602 is mounted on the parallel side of the support plate 4. When it is necessary to hold the heat transfer paper and clothing, the pressure block 602 is pulled upward to separate it from the side wall of the support plate 4. Then, the pressure block 602 is rotated so that one side of it is parallel to the upper surface of the support plate 4. Then, the pressure block 602 is slid to hold the heat transfer paper and clothing. When it is necessary to initially fix the heat transfer paper and clothing, the rotation and sliding of the pressure block 602 can fix the heat transfer paper and clothing, which is quite convenient.

[0059] like Figure 4 As shown, in some embodiments, the fastener 7 includes:

[0060] The mounting frame 701 is connected to the transport component 5. The mounting frame 701 is symmetrically installed on both sides of the support plate 4. The mounting frame 701 has a receiving cavity 702. The opening direction of the receiving cavity 702 is perpendicular to the installation direction of the pressure block 602. The mounting frame 701 is U-shaped, and the cavity in the middle is the receiving cavity 702. The installation position of the middle section of the mounting frame 701 in the printing cavity 2 is perpendicular to the installation position of the pressure block 602.

[0061] The pressure roller 703, which is installed in the mounting frame 701, is rotated and used to hold the heat transfer paper. The two ends of the pressure roller 703 are rotatably connected to the two sides parallel to the mounting frame 701. In use, when the mounting frame 701 is close to the support plate 4, the pressure roller 703 rolls on the surface of the bottom of the inner wall of the printing cavity 2 until it presses the heat transfer paper and the clothing, thus holding and fixing them. In cooperation with the holding part 6, the heat transfer paper is held on all four sides, further reducing the possibility of the heat transfer paper separating from the clothing during printing.

[0062] like Figure 2 As shown, in some embodiments, a guide groove 8 is provided inside the printing cavity 2, the bearing plate 4 slides in conjunction with the guide groove 8, and the transport component 5 includes:

[0063] An air pump 501 is installed inside the printing chamber 2, and the air pump 501 has two air outlet pipes 502.

[0064] A corrugated tube 503 is connected to one of the air outlets 502. The corrugated tube 503 is connected to the support plate 4. The support plate 4 is guided by the guide groove 8. When the air pump 501 blows air into the corrugated tube 503, the length of the corrugated tube 503 increases, pushing the support plate 4 away from the printing cavity 2 and moving it to the outside of the printing cavity 2. When the air pump 501 sucks in air, the corrugated tube 503 contracts, pulling the support plate 4 back into the printing cavity 2. The guide groove 8 guides the support plate 4, limiting its movement direction and making it move in and out of the printing cavity 2 in a straight line, increasing the stability of the support plate 4 during movement.

[0065] Two connecting pipes 504 are connected to another air outlet pipe 502. A sleeve 505 is installed on the connecting pipe 504. A sliding rod 704 that slides with the sleeve 505 is installed on the mounting frame 701. When the air pump 501 blows air, the airflow pushes the sliding rod 704 located in the sleeve 505, thereby making the mounting frame 701 closer to the support plate 4. However, when the air pump 501 sucks air, it pulls the sliding rod 704 away from the support plate 4, thereby making the mounting frame 701 away from the support plate 4 and relieving the pressure on the heat transfer paper and clothing.

[0066] When one of its air outlet pipes 502 is in the air-discharging state, the other air outlet pipe 502 is in the air-inhaling state. The two air outlet pipes 502 are respectively installed at the two outlets of the air pump 501. One blows air while the other inhales, and vice versa. That is, when the corrugated pipe 503 extends and pushes the support plate 4 out of the printing cavity 2, the other air outlet pipe 502 inhales, causing the fixing member 7 to move away from the support plate 4. When the support plate 4 is pulled back into the printing cavity 2 by the corrugated pipe 503, the air outlet pipe 502 is in the air-inhaling state and the other is in the air-discharging state, thereby pushing the slide rod 704 to make the fixing member 7 approach the support plate 4, completing the pressing and fixing, which improves the practicality of the device. The air pump 501 and multiple pipes are used as transport components 5. The flexibility and deformation of the pipes facilitate the installation of the air pump 501, which increases the number of installation positions of the air pump 501.

[0067] like Figure 2 and Figure 5 As shown, in some embodiments, an extension plate 9 is installed on the outer shell 1. The extension plate 9 is used to support the carrier plate 4 outside the printing cavity 2. Sliding sleeves 10 are installed on both sides of the extension plate 9. Side plates 11 are slidably installed inside the sliding sleeves 10. A rotating roller 12 is rotatably installed between the side plates 11. An inclined surface 13 is provided on the carrier plate 4 to guide the rotating roller 12. The lowest point of the rotating roller 12 is in contact with the heat transfer paper. When the carrier plate 4 moves onto the extension plate 9, the inclined surface 13 is opened on the side of the carrier plate 4 closer to the outside. The included angle between the inclined surfaces 13 is an acute angle, and the tip of the angle is in a vertically upward direction. Through the contact between the inclined surface 13 and the rotating roller 12, the rotating roller 12 moves onto the upper surface of the carrier plate 4, transferring the heat transfer paper to the clothing. Before placing it on the carrier plate 4, lift the rotating roller 12. After pressing the pressure block 602, the rotating roller 12 also presses on the heat transfer paper and the clothing. As the carrier plate 4 returns to the printing cavity 2, the rotating roller 12 rolls on the heat transfer paper and clothing, smoothing them out and further reducing the possibility of warping of the heat transfer paper. As the carrier plate 4 moves into the printing cavity 2, the rotating roller 12 is guided by the inclined surface 13 again, while the side plate 11 slides in the sliding sleeve 10, so that the height of the rotating roller 12 is higher than the height of the side of the carrier plate 4, and it leaves the carrier plate 4. During this process, the rotating roller 12 flattens the heat transfer paper and clothing, further reducing the possibility of subsequent separation of the heat transfer paper and clothing and improving the printing effect.

[0068] like Figure 6As shown, in some embodiments, a rod 14 is installed on the upper surface of the support plate 4, and an insertion hole 15 is provided on the side of the pressure block 602 that contacts the upper surface of the support plate 4 (here, the heat transfer paper and clothing are not on the support plate 4; when in use, the pressure block 602 presses on the heat transfer paper and clothing). When the rod 14 is inserted into the insertion hole 15, the rotation of the pressure block 602 is restricted. The length of the rod 14 is less than the length of the sliding groove 601. When in use, when the heat transfer paper and clothing are on the support plate 4 and the pressure block 602 presses them, the rod 14 is inserted into the insertion hole 15, so that the pressure block 602 can only slide in the sliding groove 601. However, the sliding of the pressure block 602 is restricted by gravity, thereby restricting the movement of the pressure block 602 and increasing its stability when pressing the heat transfer paper and clothing.

[0069] like Figure 4 As shown, in some embodiments, a limiting plate 16 is installed inside the printing cavity 2, and a sliding cavity 17 is provided on the limiting plate 16. The sliding rod 704 is slidably engaged with the sliding cavity 17. A guide block 18 is installed inside the sliding cavity 17. An inner groove 19 for accommodating the guide block 18 is provided on the side wall of the sliding rod 704. The sliding rod 704 is slidably installed in the printing cavity 2 through the limiting plate 16. The inner wall of the sliding cavity 17 restricts the sliding direction of the sliding rod 704, so that it can only move closer to or away from the bearing plate 4 in a straight line. The guide block 18 is inserted into the inner groove 19. The obstruction of the inner groove 19 by the side wall of the guide block 18 makes the sliding rod 704 only slide and not rotate in the sliding cavity 17, which improves the stability of the sliding rod 704 during movement.

[0070] like Figure 3 As shown, in some embodiments, a slider 20 is installed at the bottom of the support plate 4. The support plate 4 is slidably installed in the guide groove 8 via the slider 20. A pulley 21 is rotatably installed in the guide groove 8. The pulley 21 and the slider 20 are in rolling cooperation. An arc groove 23 is opened on the side of the slider 20 near the pulley 21. The pulley 21 and the arc groove 23 are in rolling cooperation. When the support plate 4 slides, the friction between the support plate 4 and the guide groove 8 is reduced through the rolling cooperation between the pulley 21 and the arc groove 23, thereby facilitating the sliding of the support plate 4.

[0071] like Figure 2 As shown, in some embodiments, a groove 22 is provided in the printing cavity 2, the support plate 4 is installed in the groove 22, and the guide groove 8 is provided in the groove 22. The groove 22 makes the upper surface of the support plate 4 flush with the bottom surface of the inner wall of the printing cavity 2. Since the surfaces of the two are flush, when the pressure roller 703 presses the heat transfer paper and the clothing, the possibility of the heat transfer paper being bent along the edge by the pressure roller 703 is reduced, thereby reducing the impact on the printed pattern and improving the practicality of the device.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-sided fixed-dot printing process, characterized in that, Includes the following steps: S1. The garment to be printed is sandwiched between two heat transfer sheets; S2. Turn on the printing machine and place the heat transfer paper and the garment onto the printing machine for transport. S3. After the heat transfer paper and the garment are transported into the printing machine, the periphery of the heat transfer paper is pressed inside the printing machine. S4. Start the printing machine so that it begins printing on the garment; The printing machine includes a housing (1), on which a printing cavity (2) is constructed, and a printing head (3) is installed inside the printing cavity (2), and further includes: The carrier plate (4) is used to support the heat transfer paper; The pressing members (6) installed on both sides of the support plate (4) are used to press the two sides of the heat transfer paper. The pressing members (6) include a sliding groove (601) opened on the support plate (4). A pressing block (602) is movably installed in the sliding groove (601). A sliding rod (603) is installed on the pressing block (602). The sliding rod (603) is slidably engaged with the sliding groove (601). The pressing block (602) is connected to the sliding groove (601) through the sliding rod (603). The pressing block (602) is used to press the heat transfer paper. A transport component (5) is installed inside the printing cavity (2), the transport component (5) is connected to the support plate (4), and the transport component (5) is used to move the support plate (4) inside the printing cavity (2); A fixing member (7) is installed in the printing cavity (2). The fixing member (7) is connected to the transport member (5). When the transport member (5) moves the support plate (4) into the printing cavity (2), the transport member (5) causes the fixing member (7) to press the other two sides of the heat transfer paper. The fixing member (7) includes a mounting frame (701) connected to the transport member (5). The mounting frame (701) is symmetrically installed on both sides of the support plate 4. The mounting frame (701) has a receiving cavity (702). The opening direction of the receiving cavity (702) is perpendicular to the installation direction of the pressure block (602). A pressure roller (703) is rotatably installed in the mounting frame (701). The pressure roller (703) is used to press the heat transfer paper. A guide is provided in the printing cavity (2). The guide groove (8) is slidably fitted with the bearing plate (4). The transport component (5) includes an air pump (501) installed in the printing cavity (2). The air pump (501) has two air outlet pipes (502). One of the air outlet pipes (502) is connected to a corrugated pipe (503). The corrugated pipe (503) is connected to the bearing plate (4). The other air outlet pipe (502) is connected to a connecting pipe (504). There are two connecting pipes (504). A sleeve (505) is installed on the connecting pipe (504). A slide rod (704) that slidably fits with the sleeve (505) is installed on the mounting frame (701). When one of the air outlet pipes (502) is in the air outlet state, the other air outlet pipe (502) is in the air intake state.

2. The double-sided fixed-dot printing process according to claim 1, characterized in that, An extension plate (9) is installed on the outer shell (1). The extension plate (9) is used to support the bearing plate (4) outside the printing cavity (2). Sliding sleeves (10) are installed on both sides of the extension plate (9). Side plates (11) are slidably installed inside the sliding sleeves (10). A rotating roller (12) is rotatably installed between the side plates (11). An inclined surface (13) is provided on the bearing plate (4) to guide the rotating roller (12). The lowest point of the rotating roller (12) is in contact with the heat transfer paper.

3. The double-sided fixed-dot printing process according to claim 2, characterized in that, A rod (14) is installed on the upper surface of the support plate (4). A hole (15) is opened on the side of the pressure block (602) that contacts the upper surface of the support plate (4). When the rod (14) is inserted into the hole (15), the rotation of the pressure block (602) is restricted.

4. The double-sided fixed-dot printing process according to claim 3, characterized in that, A limiting plate (16) is installed inside the printing cavity (2). A sliding cavity (17) is provided on the limiting plate (16). The sliding rod (704) slides in cooperation with the sliding cavity (17). A guide block (18) is installed inside the sliding cavity (17). An inner groove (19) for accommodating the guide block (18) is provided on the side wall of the sliding rod (704).

5. The double-sided fixed-dot printing process according to claim 4, characterized in that, The bottom of the support plate (4) is equipped with a slider (20), and the support plate (4) is slidably installed in the guide groove (8) via the slider (20). A pulley (21) is rotatably installed in the guide groove (8), and the pulley (21) and the slider (20) are in rolling cooperation.

6. The double-sided fixed-dot printing process according to claim 5, characterized in that, The printing cavity (2) has a groove (22) inside, the support plate (4) is installed in the groove (22), the guide groove (8) is opened in the groove (22), and the groove (22) makes the upper surface of the support plate (4) flush with the bottom surface inside the printing cavity (2).

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