Printing device for colored card

Abstract

The invention relates to the technical field of colored card printing, in particular to a colored card printing device which comprises a printing machine, a guide rail is fixedly connected to the left side of the interior of the printing machine, a sliding sleeve is magnetically connected to the surface of the guide rail, a printing box is fixedly connected to the right side of the sliding sleeve, and a first L-shaped supporting plate is fixedly connected to the interior of the printing box. An ink injection component is arranged in the first L-shaped supporting plate. The ink inlet pipe is in sealed connection with the external ink box, volatilization pollution is prevented, the ink inlet pipe is flexibly connected with the external ink box through the connecting hole, the built-in one-way valve prevents backflow, ink flows into the ink inlet box under the action of gravity, and the dovetail groove is matched with the sliding block to ensure transverse adjustment stability of the external connecting pipe; and when the outer connecting pipe slides along the dovetail groove, the sliding block limits radial deviation, the second rotating rod rotates bidirectionally to drive the symmetrical scraping plates to synchronously clean the inner wall of the inner pipe, residual ink stains are scraped off, and drying and blocking are avoided.

Description

Technical Field

[0001] This invention relates to the field of color card printing technology, specifically to a color card printing apparatus. Background Technology

[0002] In the field of color card printing, existing technologies generally face technical bottlenecks such as poor adjustment flexibility of printing mechanism, complex maintenance of ink system, insufficient ink injection accuracy, and low compatibility of multi-specification ink cartridges. Traditional printing devices mostly use mechanical buckles or bolt fixing structures, which makes the disassembly and assembly of printing cartridges time-consuming and laborious. Moreover, the sliding parts of the guide rail are prone to gaps due to long-term friction, affecting the color registration accuracy. Existing ink injection systems mostly rely on gravity flow or pneumatic diaphragm pumps for ink supply, which have problems such as large fluctuations in ink volume and difficulty in quantitative control. Especially in high-speed printing scenarios, ink color breaks or smudging are prone to occur. The ink dries inside the ink tube, resulting in a decrease in ink tube flow and insufficient ink injection accuracy. To address the aforementioned issues, industry-wide improvement solutions primarily focus on optimizing individual modules. Some solutions employ linear motors to drive guide rail sliders to improve positioning accuracy, but these solutions fail to resolve the challenges of dynamic sealing and self-cleaning in the ink path system. Summary of the Invention

[0003] Therefore, the present invention provides a printing apparatus for color cards to solve the above-mentioned problems.

[0004] The present invention provides the following technical solution: a printing device for color cards, including a printing machine, a guide rail fixedly connected to the left side inside the printing machine, a sliding sleeve magnetically connected to the surface of the guide rail, a printing box fixedly connected to the right side of the sliding sleeve, a first L-shaped support plate fixedly connected inside the printing box, and an ink injection component provided inside the first L-shaped support plate. The ink-filling component includes an ink inlet box, and the bottom of the first L-shaped support plate is fixedly connected to the top of the ink inlet box. The ink-filling component is used for ink-filling operations on the printing box.

[0005] In a preferred embodiment of the present invention, a sealing plate is fixedly connected to the right side of the ink cartridge, a reciprocating screw is rotatably connected to the inner wall of the sealing plate, a piston is threadedly connected to the surface of the reciprocating screw, the surface of the piston is slidably connected to the inner wall of the ink cartridge, the surface of the reciprocating screw is rotatably connected to the inner wall of the first L-shaped support plate, a first gear is fixedly connected to the left end of the reciprocating screw, a first rotating rod is rotatably connected to the inner wall of the first L-shaped support plate, a second gear is fixedly connected to the left end of the first rotating rod, the first gear and the second gear mesh, and a cylindrical cam is fixedly connected to the right end of the first rotating rod, the surface of the cylindrical cam having a reciprocating motion that connects end to end. The inner wall of the ink cartridge is fixedly connected to a first limiting plate. The top of the first limiting plate is slidably connected to the surface of the piston. A limiting groove is formed at the bottom of the first limiting plate. A second limiting plate is slidably connected to the groove wall of the limiting groove. A toothed plate is fixedly connected to the front surface of the second limiting plate. A support plate is fixedly connected to the left side of the front surface of the second limiting plate. A driven rod is fixedly connected to the bottom of the support plate. The surface of the driven rod is slidably connected to the groove wall of the cylindrical cam. A second L-shaped support plate is fixedly connected to the bottom of the ink cartridge. An inner connecting tube is fixedly connected to the inner wall of the second L-shaped support plate. An external ink cartridge is provided at the top of the first L-shaped support plate.

[0006] As a preferred embodiment of the present invention, sliders are fixedly connected to both the left and right sides of the surface of the inner connecting tube, an outer connecting tube is provided on the surface of the inner connecting tube, and sliding grooves are provided on both the left and right sides of the inner wall of the outer connecting tube. The groove wall is slidably connected to the surface of the slider, a locking block is fixedly connected to the bottom of the outer connecting tube, a spring is fixedly connected to the bottom of the second L-shaped support plate, the bottom of the spring is fixedly connected to the top of the outer connecting tube, a second rotating rod is rotatably connected to the bottom of the first limiting plate, a third gear is fixedly connected to the surface of the second rotating rod, the surface of the third gear meshes with the surface of the gear plate, scrapers are fixedly connected to both the left and right sides of the surface of the second rotating rod, and the surface of the scrapers is slidably connected to the inner wall of the inner connecting tube.

[0007] As a preferred embodiment of the present invention, the number of the card blocks is six, and the six card blocks are arranged in a circular array, with ball bearings installed at the center of adjacent circles of the card blocks.

[0008] As a preferred embodiment of the present invention, a rotating motor is fixedly connected to the right side of the sealing plate, and the output end of the rotating motor is fixedly connected to the right end of the reciprocating lead screw through a coupling.

[0009] As a preferred embodiment of the present invention, the number of the second L-shaped support plates is four, and the four second L-shaped support plates are distributed in a linear array.

[0010] As a preferred embodiment of the present invention, the front surface of the printing press is provided with a paper outlet.

[0011] As a preferred embodiment of the present invention, the top of the ink cartridge is provided with a connection hole, and an ink inlet tube is fixedly connected to the inner wall of the connection hole. The top of the ink inlet tube passes through the first L-shaped support plate and is connected to the output end of the external ink cartridge.

[0012] As a preferred embodiment of the present invention, the sliding grooves on the left and right sides of the inner wall of the outer connecting tube are dovetail grooves, and the slider on the surface of the inner connecting tube is a dovetail block adapted to it. The slider slides in conjunction with the sliding groove to limit the lateral displacement of the outer connecting tube. The two scrapers are symmetrically distributed along the axial direction of the second rotating rod, and the outer edge of the scraper is in close contact with the inner wall of the inner connecting tube. The scraper is used to scrape off the ink stains remaining in the inner connecting tube.

[0013] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the magnetic connection structure between the guide rail and the sliding sleeve enables stable sliding adjustment of the printing box along the guide rail, simplifying installation and maintenance. The integrated design of the first L-shaped support plate and the inking component improves the compactness of the equipment. After the printing press starts, the sliding sleeve moves laterally along the guide rail, positioning the printing box. The inking component controls the ink supply through the linkage mechanism inside the first L-shaped support plate, ensuring stable ink volume during printing. The magnetic connection allows for quick disassembly and assembly of the printing box. The inking structure of the reciprocating screw, gear set, and driving piston achieves precise quantitative ink supply. The cylindrical cam and toothed plate cooperate to convert rotational motion into linear motion, simplifying the transmission mechanism. The rotating motor drives the reciprocating screw to rotate, causing the piston to reciprocate within the ink inlet box. The first gear and the second gear mesh to drive the cylindrical cam to rotate. The driven rod pushes the second limit plate up and down along the cam groove. The toothed plate controls the rotation of the scraper, preventing blockage inside the inner connecting tube. The inner and outer connecting tubes and the sliding nested structure are also included. Compatible with multiple ink cartridge sizes; the dynamic sealing design of the scraper and inner connecting tube removes residual ink stains. The outer connecting tube slides with the inner connecting tube through a slider, with a spring providing preload. The second rotating rod drives the third gear to rotate, driving the toothed plate to move laterally. The scraper rotates against the inner wall of the inner tube to remove ink stains. The rotating motor directly drives the reciprocating screw to achieve fully automatic ink filling control, matching printing speed requirements. The rotating motor drives the reciprocating screw to rotate at a uniform speed through a coupling. The piston periodically draws / expels ink. The ink inlet tube is sealed to the external ink cartridge to prevent volatile pollution. The ink inlet tube is flexibly connected to the external ink cartridge through a connecting hole, with a built-in one-way valve to prevent backflow. Ink flows into the ink cartridge under gravity. The dovetail groove and slider work together to ensure the lateral adjustment stability of the outer connecting tube. The symmetrical scraper is highly efficient and self-cleaning. When the outer connecting tube slides along the dovetail groove, the slider limits radial displacement. The bidirectional rotation of the second rotating rod drives the symmetrical scraper to clean the inner wall of the inner tube simultaneously, scraping off residual ink stains and preventing drying and clogging. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of a local structure in the image; Figure 3 This is a schematic diagram of the ink-filling component structure of the present invention; Figure 4 This is a bottom view of the ink-filling component structure of the present invention; Figure 5 For the present invention Figure 3 A cross-sectional view of the ink-filling component in the middle; Figure 6 For the present invention Figure 5 Exploded view of the ink injection component structure in the image; Figure 7 For the present invention Figure 6 A cross-sectional view of the cleaning component structure.

[0015] In the diagram: 1. Printing press; 2. Paper outlet; 3. Printing box; 4. Guide rail; 5. Sliding sleeve; 6. First L-shaped support plate; 7. Ink filling component; 701. Ink cartridge; 702. Rotary motor; 703. First gear; 704. Second gear; 705. Cylindrical cam; 706. First rotating rod; 707. Second limiting plate; 708. Connecting hole; 709. Ink inlet tube; 710. Reciprocating lead screw; 7 11. Piston; 712. Sealing plate; 713. Support plate; 714. Driven rod; 715. First limiting plate; 716. Limiting groove; 717. Second L-shaped support plate; 718. Toothed plate; 719. Third gear; 720. Second rotating rod; 721. Scraper; 722. External connecting pipe; 723. Spring; 724. Slide groove; 725. Slider; 726. Internal connecting pipe; 727. Locking block. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-6 The technical solution provided by the present invention specifically includes the following embodiments: Example: A printing device for color cards includes a printing machine 1. A guide rail 4 is fixedly connected to the left side inside the printing machine 1. A sliding sleeve 5 is magnetically connected to the surface of the guide rail 4. A printing box 3 is fixedly connected to the right side of the sliding sleeve 5. A first L-shaped support plate 6 is fixedly connected inside the printing box 3. An ink injection component 7 is provided inside the first L-shaped support plate 6. The ink filling component 7 includes an ink inlet box 701, and the bottom of the first L-shaped support plate 6 is fixedly connected to the top of the ink inlet box 701. The ink filling component 7 is used for the ink filling operation of the printing box 3. The magnetic connection structure between the guide rail 4 and the sliding sleeve 5 enables the printing box 3 to slide stably along the guide rail 4, simplifying installation and maintenance. The integrated design of the first L-shaped support plate 6 and the ink injection component 7 improves the compactness of the equipment. After the printing machine 1 is started, the sliding sleeve 5 moves laterally along the guide rail 4, which drives the printing box 3 to be positioned. The ink injection component 7 controls the ink supply through the linkage mechanism inside the first L-shaped support plate 6, ensuring stable ink volume during the printing process. The magnetic connection allows for quick disassembly and assembly of the printing box 3.

[0018] A sealing plate 712 is fixedly connected to the right side of the ink cartridge 701. A reciprocating screw 710 is rotatably connected to the inner wall of the sealing plate 712. A piston 711 is threadedly connected to the surface of the reciprocating screw 710. The surface of the piston 711 is slidably connected to the inner wall of the ink cartridge 701. The surface of the reciprocating screw 710 is rotatably connected to the inner wall of the first L-shaped support plate 6. A first gear 703 is fixedly connected to the left end of the reciprocating screw 710. A first rotating rod 706 is rotatably connected to the inner wall of the first L-shaped support plate 6. A second gear 704 is fixedly connected to the left end of the first rotating rod 706. The first gear 703 and the second gear 704 mesh. A cylindrical cam 705 is fixedly connected to the right end of the first rotating rod 706. The surface of the cylindrical cam 705 has a reciprocating groove that connects the beginning and end. A first limiting plate 715 is fixedly connected to the inner wall of 1. The top of the first limiting plate 715 is slidably connected to the surface of the piston 711. A limiting groove 716 is opened at the bottom of the first limiting plate 715. A second limiting plate 707 is slidably connected to the groove wall of the limiting groove 716. A toothed plate 718 is fixedly connected to the front surface of the second limiting plate 707. A support plate 713 is fixedly connected to the left side of the front surface of the second limiting plate 707. A driven rod 714 is fixedly connected to the bottom of the support plate 713. The surface of the driven rod 714 is slidably connected to the groove wall of the cylindrical cam 705. A second L-shaped support plate 717 is fixedly connected to the bottom of the ink cartridge 701. An inner connecting pipe 726 is fixedly connected to the inner wall of the second L-shaped support plate 717. An external ink cartridge is provided at the top of the first L-shaped support plate 6. The reciprocating screw 710 and gear sets 703 and 704 drive the piston 711 in an ink-filling structure to achieve precise quantitative ink supply. The cylindrical cam 705 and the gear plate 718 cooperate to convert the rotary motion into linear motion, simplifying the transmission mechanism. The rotating motor 702 drives the reciprocating screw 710 to rotate, which in turn drives the piston 711 to reciprocate within the ink cartridge 701. The first gear 703 and the second gear 704 mesh to drive the cylindrical cam 705 to rotate. The driven rod 714 pushes the second limiting plate 707 up and down along the cam groove. The tooth plate 718 controls the rotation of the scraper 721 to prevent blockage inside the inner connecting pipe 726.

[0019] Slider 725 is fixedly connected to both the left and right sides of the surface of the inner connecting tube 726. An outer connecting tube 722 is provided on the surface of the inner connecting tube 726. Sliding grooves 724 are opened on both the left and right sides of the inner wall of the outer connecting tube 722. The groove wall of the sliding groove 724 is slidably connected to the surface of the slider 725. A locking block 727 is fixedly connected to the bottom of the outer connecting tube 722. A spring 723 is fixedly connected to the bottom of the second L-shaped support plate 717. The bottom of the spring 723 is fixedly connected to the top of the outer connecting tube 722. A second rotating rod 720 is rotatably connected to the bottom of the first limiting plate 715. A third gear 719 is fixedly connected to the surface of the second rotating rod 720. The surface of the third gear 719 meshes with the surface of the toothed plate 718. Scrapers 721 are fixedly connected to both the left and right sides of the surface of the second rotating rod 720. The surface of the scraper 721 is slidably connected to the inner wall of the inner connecting tube 726. The sliding nested structure of the inner and outer connecting tubes 726 and 722 is compatible with various ink cartridge sizes; the dynamic sealing design of the scraper 721 and the inner connecting tube 726 removes residual ink stains; the outer connecting tube 722 slides with the inner connecting tube 726 through the slider 725 and the groove 724 of the inner connecting tube 726; the spring 723 provides preload; the second rotating rod 720 drives the third gear 719 to rotate, driving the toothed plate 718 to move laterally; the scraper 721 rotates against the inner wall of the inner tube to remove ink stains.

[0020] There are six card blocks 727, which are arranged in a circular array. Ball bearings are installed at the center of adjacent circles of card blocks 727. A rotary motor 702 is fixedly connected to the right side of the sealing plate 712. The output end of the rotary motor 702 is fixedly connected to the right end of the reciprocating screw 710 through a coupling. The rotating motor 702 directly drives the reciprocating lead screw 710 to achieve fully automatic ink injection control and match the printing speed requirements. The rotating motor 702 drives the reciprocating lead screw 710 to rotate at a constant speed through the coupling, and the piston 711 periodically draws in / expels ink.

[0021] There are four second L-shaped support plates 717, which are arranged in a linear array. The front surface of the printing press 1 has a paper outlet 2. The top of the ink cartridge 701 has a connection hole 708, and the inner wall of the connection hole 708 is fixedly connected to an ink inlet pipe 709. The top of the ink inlet pipe 709 passes through the first L-shaped support plate 6 and is connected to the output end of the external ink cartridge. The ink inlet tube 709 is sealed to the external ink cartridge to prevent volatile pollution. The ink inlet tube 709 is flexibly connected to the external ink cartridge through the connection hole 708. A built-in one-way valve prevents backflow. The ink flows into the ink inlet cartridge 701 under the action of gravity.

[0022] The grooves 724 on the left and right sides of the inner wall of the outer connecting tube 722 are dovetail grooves, and the slider 725 on the surface of the inner connecting tube 726 is a matching dovetail block. The slider 725 slides with the groove 724 to limit the lateral displacement of the outer connecting tube 722. The two scrapers 721 are symmetrically distributed along the axis of the second rotating rod 720, and the outer edge of the scraper 721 is in close contact with the inner wall of the inner connecting tube 726. The scraper 721 is used to scrape off the ink stains remaining in the inner connecting tube 726. The dovetail groove 724 and the slider 725 work together to ensure the lateral adjustment stability of the outer connecting tube 722; the symmetrical scraper 721 is highly efficient and self-cleaning. When the outer connecting tube 722 slides along the dovetail groove 724, the slider 725 restricts radial displacement. The second rotating rod 720 rotates in both directions to drive the symmetrical scraper 721 to clean the inner wall of the inner tube simultaneously. Residual ink stains are scraped off to prevent drying and clogging.

[0023] This invention utilizes the magnetic connection structure between the guide rail 4 and the sliding sleeve 5 to achieve stable sliding adjustment of the printing box 3 along the guide rail 4, simplifying installation and maintenance. The integrated design of the first L-shaped support plate 6 and the inking component 7 improves the compactness of the equipment. After the printing press 1 starts, the sliding sleeve 5 moves laterally along the guide rail 4, positioning the printing box 3. The inking component 7 controls the ink supply through the linkage mechanism inside the first L-shaped support plate 6, ensuring stable ink volume during printing. The magnetic connection allows for quick assembly and disassembly of the printing box 3. The reciprocating lead screw 710 and gear sets 703 and 704 drive the piston 711 in an inking structure, achieving precise inking. Quantitative ink supply; the cylindrical cam 705, in conjunction with the gear plate 718, converts rotary motion into linear motion, simplifying the transmission mechanism. The rotating motor 702 drives the reciprocating screw 710 to rotate, causing the piston 711 to reciprocate within the ink cartridge 701. The first gear 703 and the second gear 704 mesh to drive the cylindrical cam 705 to rotate. The driven rod 714 pushes the second limiting plate 707 up and down along the cam groove. The gear plate 718 controls the rotation of the scraper 721 to prevent blockage inside the inner connecting tube 726. The sliding nested structure of the inner and outer connecting tubes 726 and 722 is compatible with various ink cartridge sizes. The dynamic sealing design of the scraper 721 and the inner connecting tube 726 removes residual ink stains. The outer connecting tube 722 slides with the inner connecting tube 726 through the slider 725 and the groove 724. The spring 723 provides preload. The second rotating rod 720 drives the third gear 719 to rotate, driving the toothed plate 718 to move laterally. The scraper 721 rotates against the inner wall of the inner tube to remove ink stains. The rotating motor 702 directly drives the reciprocating screw 710 to achieve fully automatic ink injection control, matching the printing speed requirements. The rotating motor 702 drives the reciprocating screw 710 to rotate at a uniform speed through the coupling. The piston 711 periodically draws ink. The ink inlet tube 709 is sealed to the external ink cartridge to prevent volatile pollution. The ink inlet tube 709 is flexibly connected to the external ink cartridge through the connection hole 708. A built-in one-way valve prevents backflow. The ink flows into the ink cartridge 701 under the action of gravity. The dovetail groove 724 and the slider 725 cooperate to ensure the lateral adjustment stability of the external connecting tube 722. The symmetrical scraper 721 is highly efficient and self-cleaning. When the external connecting tube 722 slides along the dovetail groove 724, the slider 725 limits the radial displacement. The second rotating rod 720 rotates in both directions to drive the symmetrical scraper 721 to clean the inner wall of the inner tube simultaneously. Residual ink stains are scraped off to prevent drying and clogging.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A printing apparatus for color cards, characterized in that: The printing press (1) includes a guide rail (4) fixedly connected to the left side inside the printing press (1), a sliding sleeve (5) magnetically connected to the surface of the guide rail (4), a printing box (3) fixedly connected to the right side of the sliding sleeve (5), a first L-shaped support plate (6) fixedly connected inside the printing box (3), and an ink injection component (7) provided inside the first L-shaped support plate (6). The ink injection component (7) includes an ink inlet box (701), the bottom of the first L-shaped support plate (6) is fixedly connected to the top of the ink inlet box (701), and the ink injection component (7) is used for ink injection operation of the printing box (3).

2. The printing apparatus for color cards according to claim 1, characterized in that: A sealing plate (712) is fixedly connected to the right side of the ink cartridge (701). A reciprocating screw (710) is rotatably connected to the inner wall of the sealing plate (712). A piston (711) is threadedly connected to the surface of the reciprocating screw (710). The surface of the piston (711) is slidably connected to the inner wall of the ink cartridge (701). The surface of the reciprocating screw (710) is rotatably connected to the inner wall of the first L-shaped support plate (6). A first gear (703) is fixedly connected to the left end of the reciprocating screw (710). A first rotating rod (706) is rotatably connected to the inner wall of the first L-shaped support plate (6). A second gear (704) is fixedly connected to the left end of the first rotating rod (706). The first gear (703) and the second gear (704) mesh. A cylindrical cam (705) is fixedly connected to the right end of the first rotating rod (706). A reciprocating groove with the ends connected is opened on the surface of the cylindrical cam (705). A first limiting plate (715) is fixedly connected to the inner wall of (701). The top of the first limiting plate (715) is slidably connected to the surface of the piston (711). A limiting groove (716) is opened at the bottom of the first limiting plate (715). A second limiting plate (707) is slidably connected to the groove wall of the limiting groove (716). A toothed plate (718) is fixedly connected to the front surface of the second limiting plate (707). A support plate (713) is fixedly connected to the left side of the front surface of the second limiting plate (707). A driven rod (714) is fixedly connected to the bottom of the support plate (713). The surface of the driven rod (714) is slidably connected to the groove wall of the cylindrical cam (705). A second L-shaped support plate (717) is fixedly connected to the bottom of the ink cartridge (701). An inner connecting pipe (726) is fixedly connected to the inner wall of the second L-shaped support plate (717). An external ink cartridge is provided at the top of the first L-shaped support plate (6).

3. The printing apparatus for color cards according to claim 2, characterized in that: Slider blocks (725) are fixedly connected to both the left and right sides of the surface of the inner connecting tube (726). An outer connecting tube (722) is provided on the surface of the inner connecting tube (726). Sliding grooves (724) are provided on both the left and right sides of the inner wall of the outer connecting tube (722). The groove wall of the sliding groove (724) is slidably connected to the surface of the slider (725). A locking block (727) is fixedly connected to the bottom of the outer connecting tube (722). A spring (723) is fixedly connected to the bottom of the second L-shaped support plate (717). The bottom of the spring (723) is fixedly connected to the top of the outer connecting tube (722). The bottom of the first limiting plate (715) is rotatably connected to the second rotating rod (720). The surface of the second rotating rod (720) is fixedly connected to the third gear (719). The surface of the third gear (719) meshes with the surface of the toothed plate (718). Scrapers (721) are fixedly connected to both the left and right sides of the surface of the second rotating rod (720). The surface of the scraper (721) is slidably connected to the inner wall of the inner connecting tube (726).

4. The printing apparatus for color cards according to claim 3, characterized in that: The number of the card blocks (727) is six, and the six card blocks (727) are arranged in a circular array. A ball bearing is installed at the center of an adjacent circle of the card blocks (727).

5. A printing apparatus for color cards according to claim 2, characterized in that: A rotary motor (702) is fixedly connected to the right side of the sealing plate (712), and the output end of the rotary motor (702) is fixedly connected to the right end of the reciprocating screw (710) through a coupling.

6. The printing apparatus for color cards according to claim 2, characterized in that: The number of the second L-shaped support plates (717) is four, and the four second L-shaped support plates (717) are distributed in a linear array.

7. The printing apparatus for color cards according to claim 1, characterized in that: The printing press (1) has a paper outlet (2) on its front surface.

8. A printing apparatus for color cards according to claim 2, characterized in that: The top of the ink cartridge (701) is provided with a connection hole (708), and an ink inlet tube (709) is fixedly connected to the inner wall of the connection hole (708). The top of the ink inlet tube (709) passes through the first L-shaped support plate (6) and is connected to the output end of the external ink cartridge.

9. A printing apparatus for color cards according to claim 3, characterized in that: The grooves (724) on the left and right sides of the inner wall of the outer connecting tube (722) are dovetail grooves. The slider (725) on the surface of the inner connecting tube (726) is a dovetail block that is adapted to it. The slider (725) slides with the groove (724) to limit the lateral displacement of the outer connecting tube (722). The two scrapers (721) are symmetrically distributed along the axis of the second rotating rod (720), and the outer edge of the scraper (721) is in close contact with the inner wall of the inner connecting tube (726). The scraper (721) is used to scrape off the ink stains remaining in the inner connecting tube (726).

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