A digital printing machine with alternating dual-carriage printing

Abstract

This invention relates to the field of textile printing and dyeing, and discloses a digital printing machine with alternating dual-carriage printing. The machine includes a body with a printing chamber inside. A discharge trough is provided on the front of the printing chamber. An alternating printing mechanism is installed within the printing chamber, comprising two horizontally arranged worktable assemblies, a first worktable and a second worktable. Two Y-axis moving modules are installed on the bottom wall of the printing chamber, driving the two worktable assemblies to move along the Y-axis. Two spray carriages are located within the printing chamber, including a treatment liquid spray carriage and an ink spray carriage. The treatment liquid spray carriage is located on the side of the ink spray carriage closest to the discharge trough. This invention achieves a cyclical and one-time printing process by using two spray carriages to directly spray the treatment liquid and ink, respectively, enabling alternating dual-carriage printing on four worktables. This significantly improves printing efficiency, reduces energy consumption, and eliminates contamination from excess ink.

Description

Technical Field

[0001] This invention belongs to the field of textile printing and dyeing, specifically a digital printing machine with alternating dual-carriage printing. Background Technology

[0002] Textile printing is a core step in the deep processing of textile fabrics, directly determining the fabric's aesthetics, added value, and market competitiveness. As the global textile industry transforms towards personalization, fast fashion, and green practices, traditional printing processes can no longer meet the diversified market demands. Digital printing technology has emerged and is gradually becoming the mainstream in the industry. To address the shortcomings of traditional printing processes, digital printing machines for textiles are being increasingly widely adopted. Based on the inkjet printing principle, these machines use computer-controlled printheads to directly spray specialized ink onto the surface of the textile fabric, eliminating the need for plate-making and enabling rapid pattern printing. This effectively shortens the cycle from design to production, while using less than 10% of the water compared to traditional processes, offering significant environmental advantages and aligning with the industry's green transformation trend. However, before inkjet printing, pretreatment of the textile fabric with a treatment solution is required, but the following drawbacks still exist: The spraying of treatment liquid and ink on textiles need to be carried out separately on two separate machines, which results in a long textile transfer time, low work efficiency, and the generation of excess color paste, which causes pollution. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the present invention provides a digital printing machine with alternating dual-carriage printing, which effectively solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a digital printing machine with alternating dual-carriage printing, comprising a machine body, wherein a printing cavity is provided inside the machine body, a material discharge groove is provided on the front of the printing cavity, and an alternating printing mechanism is provided inside the printing cavity; The alternating printing mechanism includes two worktable assemblies arranged horizontally side by side. The two worktable assemblies include a first worktable and a second worktable. Two Y-axis moving modules are installed on the bottom wall of the printing cavity. The two Y-axis moving modules are used to drive the two worktable assemblies to move along the Y-axis, respectively. The printing chamber is equipped with two spray carriages, one for spraying treatment liquid and the other for spraying ink. The treatment liquid spray carriage is located on the side of the ink spray carriage closer to the discharge trough. The treatment liquid spray carriage is used to spray treatment liquid, and the ink spray carriage is used to spray ink. The printing chamber is equipped with two X-axis moving modules, which are used to drive the two spray carriages to move along the X-axis.

[0005] Preferably, the workbench assembly includes a moving platform, with two symmetrically mounted support plates installed at the top of the moving platform. Negative pressure holes are evenly distributed on the upper surface of the support plates. Two connecting blocks are installed at the bottom of the moving platform, and the connecting blocks are connected to the Y-axis moving module. A positioning and stabilizing component is provided in the printing cavity and the moving platform. The positioning and stabilizing component is used to position the workbench assembly when it moves to the printing position.

[0006] Preferably, the positioning stabilization component includes a movable positioning element installed at the bottom of the mobile platform, the movable positioning element being located between two connecting blocks; Two fixed positioning components are provided on the moving path of the moving module along the Y-axis of the mobile platform. The two fixed positioning components are located below the two moving modules of the X-axis respectively. When the mobile platform moves to the locking position of the moving positioning component and the two fixed positioning components respectively, the support plate can move to the bottom of the liquid spraying car and the ink spraying car respectively.

[0007] Preferably, the movable positioning component includes a connecting frame fixedly installed at the bottom of the movable platform. Semi-annular shells are symmetrically installed on the side of the connecting frame away from the discharge chute. Side plates are installed on the upper ends of the two semi-annular shells on the side closest to each other. A first pressure sensor is installed on the side of the side plate away from the discharge chute.

[0008] Preferably, the semi-annular shell has an arc-shaped groove inside, and arc-shaped guide grooves are symmetrically formed on both sides of the arc-shaped groove. A semi-annular limiting sleeve is movably installed inside the arc-shaped groove. Guide blocks are symmetrically installed on both sides of the semi-annular limiting sleeve. The two guide blocks are slidably connected to the two arc-shaped guide grooves respectively. The semi-annular limiting sleeve has toothed grooves at equal angles along the outer wall of the arc. A drive motor is installed at the top of the semi-annular shell. A gear is installed on the output shaft of the drive motor. The gear meshes with the toothed grooves.

[0009] Preferably, the fixing and positioning component includes two limiting rods. A first limiting arc plate and a second limiting arc plate are symmetrically installed on the outer wall of each of the two limiting rods. The two second limiting arc plates are located between the two first limiting arc plates. The first limiting arc plates are located on the side of the limiting rod closer to the discharge chute, and the second limiting arc plates are located on the side of the limiting rod away from the discharge chute. A protrusion is installed on the side of the two second limiting arc plates that are far from each other. A relative movement module is provided below the two limiting rods.

[0010] Preferably, a pressure block and a second pressure sensor are respectively installed at the ends of the two limiting rods that are close to each other.

[0011] Preferably, the relative movement module includes a fixed box disposed below the two limiting rods. The fixed box is installed on the bottom wall of the printing cavity. A sliding groove is provided on the inner wall of the fixed box. Two sliding seats are symmetrically slidably installed inside the sliding groove. The two sliding seats are fixedly connected to the ends of the two limiting rods that are far apart from each other. A spring is installed on the side of the two sliding seats that are far apart from each other. The ends of the two springs are fixedly connected to the inner walls of the two ends of the sliding groove.

[0012] Preferably, the fixed box has an internal groove located below the sliding groove, and a connecting groove is formed between the internal groove and the sliding groove. Longitudinal rods are symmetrically installed inside the internal groove, and a longitudinal sliding plate is movably installed inside the internal groove. The longitudinal sliding plate is slidably connected to the longitudinal rods. Connecting rods are symmetrically hinged to the top of the longitudinal sliding plate, and the tops of the two connecting rods are respectively hinged to two sliding seats. A magnetic block is installed at the bottom of the longitudinal sliding plate, and an electromagnet is installed on the inner bottom wall of the internal groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are: (1) In this invention, two spray guns are used to spray the treatment liquid and spray the ink respectively, integrating the traditionally separate pretreatment and printing processes into one, realizing the "All-in-One" process reengineering. By precisely spraying the treatment liquid and ink, the pattern is directly sprayed onto the fabric, completing the printing in one go. This not only eliminates the plate-making process, but also fundamentally eliminates the generation of excess pigment, thus reducing pollution from the source. (2) In this invention, two spray cars are used to directly spray the treatment liquid and spray the ink respectively. One spray car directly sprays the treatment liquid, and after completion, the second spray car takes over to spray the ink. The first spray car directly runs to the position of the second set of worktable components to continue the treatment liquid spraying work for the next set of patterns, thereby realizing the cycle and one-time completion of printing. It realizes the alternating printing of four worktables by two cars, which greatly improves the printing efficiency, reduces energy consumption, and eliminates the pollution of excess ink. (3) In this invention, after the worktable assembly moves to the printing position, the semi-circular shell is in close contact with the limiting rod, and the semi-circular limiting sleeve is driven to rotate outward, which generates pressure on the protrusion on the side wall of the second limiting arc plate, thereby pushing the two limiting rods closer to each other, so that the pressure block generates pressure on the second pressure sensor, indicating that the worktable assembly has moved to the accurate position, thereby improving the printing accuracy. (4) In this invention, after the semi-circular limiting sleeve rotates outward, the semi-circular shell and the semi-circular limiting sleeve form a ring around the outside of the limiting rod, and at the same time push the limiting rod to move, so that the first limiting arc plate contacts the side wall of the semi-circular shell, and the end of the protrusion contacts the other side wall of the semi-circular limiting sleeve, thereby playing a dual fixing role of X-axis limiting and Y-axis limiting on the moving platform, reducing the movement of the worktable assembly after it stops at the printing position, and improving the printing stability; (5) In this invention, the protrusion is set in a semi-circular shape and is located on the side of the limiting rod away from the semi-circular shell. When the semi-circular limiting sleeve rotates outward, it can limit the worktable assembly. When the semi-circular limiting sleeve retracts, the two limiting rods move away from each other and can be opened directly, which makes it convenient for the worktable assembly to continue to move for subsequent printing or to remove the material. This makes it convenient to use. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the digital printing machine with alternating dual-carriage printing according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the printing cavity of the present invention; Figure 3 This is a schematic diagram of the workbench assembly structure of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the mobile platform of the present invention; Figure 5 This is a schematic diagram of the moving positioning component and the fixed positioning component of the present invention; Figure 6 This is a schematic diagram of the moving positioning component structure of the present invention; Figure 7 This is a schematic diagram of the semi-annular shell and semi-annular limiting sleeve structure of the present invention; Figure 8 For the present invention Figure 5 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the relative movement module structure of the present invention; In the diagram: 1. Machine body; 2. Discharge chute; 3. Workbench assembly; 3a. First workbench; 3b. Second workbench; 301. Moving platform; 302. Support plate; 303. Negative pressure hole; 304. Connecting block; 305. Moving positioning component; 3051. Connecting frame; 3052. Semi-annular shell; 3054. Side plate; 3055. First pressure sensor; 3056. Arc groove; 3057. Semi-annular limiting sleeve; 3058. Arc guide groove; 3059. Guide block; 30510. Gear groove; 30511. Gear; 30512. Drive motor; 306. Fixed positioning component; 3061. Limiting rod; 3062, First limiting arc plate; 3063, Second limiting arc plate; 3064, Protrusion; 3065, Pressure block; 3066, Second pressure sensor; 3067, Relative movement module; 30671, Fixed box; 30672, Sliding groove; 30673, Sliding seat; 30674, Spring; 30675, Internal groove; 30676, Connecting groove; 30677, Longitudinal rod; 30678, Longitudinal transfer plate; 30679, Connecting rod; 306710, Magnetic block; 306711, Electromagnet; 4, Y-axis moving module; 5, Spraying vehicle; 5a, Processing liquid spraying vehicle; 5b, Ink spraying vehicle; 6, X-axis moving module. Detailed Implementation

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

[0017] Example 1, by Figure 1 The present invention relates to a digital printing machine with alternating dual-carriage printing, comprising a machine body 1, a printing cavity provided inside the machine body 1, a material discharge groove 2 provided on the front of the printing cavity, and an alternating printing mechanism provided inside the printing cavity. Depend on Figure 2 The alternating printing mechanism includes two horizontally arranged worktable assemblies 3, each worktable assemblies 3 including a first worktable 3a and a second worktable 3b. Two Y-axis moving modules 4 are installed on the bottom wall of the printing cavity, and the two Y-axis moving modules 4 are used to drive the two worktable assemblies 3 to move along the Y-axis respectively. The printing chamber is equipped with two spray carriages 5, including a treatment liquid spray carriage 5a and an ink spray carriage 5b. The treatment liquid spray carriage 5a is located on the side of the ink spray carriage 5b closer to the discharge trough 2. The treatment liquid spray carriage 5a is used to spray the treatment liquid, and the ink spray carriage 5b is used to spray the ink. The two spray carriages 5 are used to directly spray the treatment liquid and spray the ink, respectively. This integrates the traditionally separate pretreatment and printing processes into one, realizing an "All-in-One" process reengineering. By precisely spraying the treatment liquid and ink, the pattern is directly printed onto the fabric, completing the printing in one step. This not only eliminates the plate-making process but also fundamentally eliminates unnecessary steps. The generation of pigment paste reduces pollution at its source. Two X-axis moving modules 6 are installed inside the printing chamber. The two X-axis moving modules 6 are used to drive two spray carriages 5 to move along the X-axis. The two spray carriages 5 are used to directly spray the treatment liquid and spray ink, respectively. One spray carriage 5 directly sprays the treatment liquid. After completion, the second spray carriage 5 takes over to spray ink, while the first spray carriage 5 directly moves to the position of the second set of worktable components 3 to continue spraying the treatment liquid for the next set of patterns. This achieves a cycle and completes the printing in one go. It realizes the alternating printing of four worktables by two carriages, which greatly improves the printing efficiency, reduces energy consumption, and eliminates the pollution of excess pigment paste.

[0018] Depend on Figures 3-5 As shown, the worktable assembly 3 includes a moving platform 301, with two symmetrically mounted support plates 302 installed on the top of the moving platform 301. Negative pressure holes 303 are evenly distributed on the upper surface of the support plates 302. Two connecting blocks 304 are installed at the bottom of the moving platform 301. The connecting blocks 304 are connected to the Y-axis moving module 4. A positioning and stabilizing component is provided inside the printing cavity of the moving platform 301. The positioning and stabilizing component is used to position the worktable assembly 3 when it moves to the printing position. The positioning stabilization component includes a movable positioning component 305 installed at the bottom of the movable platform 301. The movable positioning component 305 is located between two connecting blocks 304. Two fixed positioning components 306 are provided on the moving path of the movable platform 301 along the Y-axis moving module 4. The two fixed positioning components 306 are respectively located below the two X-axis moving modules 6. When the movable platform 301 moves to the locking position of the movable positioning component 305 and the two fixed positioning components 306, the support plate 302 can move to the bottom of the processing liquid spraying carriage 5a and the ink spraying carriage 5b respectively. Depend on Figures 6-7The movable positioning component 305 includes a connecting frame 3051 fixedly installed at the bottom of the movable platform 301. Semi-annular housings 3052 are symmetrically mounted on the side of the connecting frame 3051 away from the discharge chute 2. Side plates 3054 are mounted on the upper ends of the two semi-annular housings 3052, close to each other. A first pressure sensor 3055 is mounted on the side of the side plate 3054 away from the discharge chute 2. An arc-shaped groove 3056 is formed inside the semi-annular housing 3052. Arc-shaped guide grooves 3058 are symmetrically formed on both sides of the arc-shaped groove 3056. A semi-annular limiting sleeve 3057 is movably installed inside the arc-shaped groove 3056. Guide blocks 3059 are symmetrically installed on both sides of the semi-annular limiting sleeve 3057. The two guide blocks 3059 are slidably connected to two arc-shaped guide grooves 3058 respectively. The semi-annular limiting sleeve 3057 has toothed grooves 30510 at equal angles along the outer wall of the arc. The top of the semi-annular shell 3052 is equipped with a drive motor 30512. A gear 30511 is installed on the output shaft of the drive motor 30512. The gear 30511 meshes with the toothed groove 30510. After the semi-annular limiting sleeve 3057 rotates outward, the semi-annular shell 3052 and the semi-annular limiting sleeve 3057 form a ring, and then the limiting is achieved. Depend on Figure 8The fixed positioning component 306 includes two limiting rods 3061. A first limiting arc plate 3062 and a second limiting arc plate 3063 are symmetrically installed on the outer walls of both limiting rods 3061. The two second limiting arc plates 3063 are located between the two first limiting arc plates 3062. The first limiting arc plates 3062 are located on the side of the limiting rod 3061 closer to the discharge chute 2, and the second limiting arc plates 3063 are located on the side of the limiting rod 3061 away from the discharge chute 2. A protrusion 3064 is installed on the side of each of the two second limiting arc plates 3063 that is away from each other. After the semi-annular limiting sleeve 3057 rotates outward, the semi-annular shell 3052 and the semi-annular limiting sleeve 3057 form a ring around the outside of the limiting rod 3061, simultaneously pushing the limiting rod 3061 to move. This causes the first limiting arc plate 3062 to contact the side wall of the semi-annular shell 3052, while the end point of the protrusion 3064 contacts the semi-annular shell 3052. The other side wall of the limiting sleeve 3057 contacts the moving platform 301, thus providing dual fixation for the X-axis and Y-axis, reducing the movement of the worktable assembly 3 after it stops at the printing position, and improving printing stability. A relative movement module 3067 is provided below the two limiting rods 3061. A pressure block 3065 and a second pressure sensor 3066 are respectively installed at the ends of the two limiting rods 3061 that are close to each other. After the worktable assembly 3 moves to the printing position, the semi-annular housing 3052 is in close contact with the limiting rods 3061 and drives the semi-annular limiting sleeve 3057 to rotate outward, which puts pressure on the protrusion 3064 on the side wall of the second limiting arc plate 3063, thereby pushing the two limiting rods 3061 closer to each other, so that the pressure block 3065 puts pressure on the second pressure sensor 3066, indicating that the worktable assembly 3 has moved to the accurate position, thereby improving printing accuracy. Depend on Figure 9The relative movement module 3067 includes a fixed box 30671 disposed below two limiting rods 3061. The fixed box 30671 is installed on the bottom wall of the printing cavity. A sliding groove 30672 is formed on the inner wall of the fixed box 30671. Two sliding seats 30673 are symmetrically slidably installed inside the sliding groove 30672. The two sliding seats 30673 are respectively fixedly connected to the ends of the two limiting rods 3061 that are far apart from each other. A spring 30674 is installed on the side of each sliding seat 30673 that is far apart from each other. The ends of the two springs 30674 are respectively fixedly connected to the inner walls of both ends of the sliding groove 30672. An internal groove 30675 is formed inside the fixed box 30671. The internal groove 30675 is located below the sliding groove 30672. A connecting groove 30676 is formed between the internal groove 30675 and the sliding groove 30672. Symmetrically installed inside the internal groove 30675 are... A longitudinal moving plate 30678 is movably installed inside the longitudinal rod 30677 and the internal groove 30675. The longitudinal moving plate 30678 is slidably connected to the longitudinal rod 30677. Connecting rods 30679 are symmetrically hinged to the top of the longitudinal moving plate 30678. The tops of the two connecting rods 30679 are respectively hinged to two sliding seats 30673. A magnetic block 306710 is installed at the bottom of the longitudinal moving plate 30678. An electromagnet 306711 is installed on the inner bottom wall of the internal groove 30675. The protrusion 3064 is set in a semi-circular shape and is located on the side of the limiting rod 3061 away from the semi-circular housing 3052. When the semi-circular limiting sleeve 3057 rotates outward, it can limit the worktable assembly 3. When the semi-circular limiting sleeve 3057 retracts, the two limiting rods 3061 move away from each other and can be opened directly, which facilitates the continued movement of the worktable assembly 3 for subsequent printing or material removal and discharge, making it convenient to use.

[0019] Working principle: During use, the two worktable components 3 are located on the front of the machine body 1. Two support plates 302 are installed above the moving platform 301. The textiles to be printed are placed on the support plates 302, and negative pressure is generated through the negative pressure holes 303 to fix the textiles. After the textile is installed on the top of the two support plates 302 on the first workbench 3a, the moving platform 301 is moved by the corresponding Y-axis moving module 4, which moves the moving platform 301 to the area below the X-axis moving module 6 on the treatment liquid spraying vehicle 5a. At this time, the Y-axis moving module 4 drives the treatment liquid spraying vehicle 5a to move sequentially above the two support plates 302 on the first workbench 3a, and sprays the treatment liquid onto the textile above the two support plates 302 in sequence, while simultaneously feeding the textile onto the two support plates 302 on the second workbench 3b. Then, driven by the Y-axis moving module 4, the first worktable 3a continues to move to the underside of the X-axis moving module 6 connected to the ink spraying carriage 5b. Driven by the X-axis moving module 6, the ink spraying carriage 5b passes sequentially over the two support plates 302 above the first worktable 3a to spray ink onto the textile. Simultaneously, another Y-axis moving module 4 drives the second worktable 3b to move to the underside of the X-axis moving module 6 where the treatment liquid spraying carriage 5a is installed. Then, driven by the X-axis moving module 6, the treatment liquid spraying carriage 5a passes sequentially over the two support plates 302 above the second worktable 3b to spray treatment liquid onto the textile above the two support plates 302 on the second worktable 3b. After the textile printing on the first worktable 3a is completed, it moves from the discharge chute 2 to the outside of the machine body 1 under the drive of the Y-axis moving module 4 for unloading. Meanwhile, the second worktable 3b continues to move under the drive of the Y-axis moving module 4 to the X-axis moving module 6 connected to the ink spraying carriage 5b, spraying the textile above the two support plates 302 on the second worktable 3b with treatment liquid. Then the second worktable 3b moves outward. At this time, the textile on the first worktable 3a is unloaded and the next batch is loaded. The above operation is repeated to continuously print on the textile. When the mobile platform 301 moves along the Y-axis moving module 4 to the spraying station, the two semi-annular shells 3052 on the connecting frame 3051 at its bottom are tightly attached to the outer walls of the two limiting rods 3061 respectively. When aligned, the first pressure sensor 3055 presses against the end of the second limiting arc plate 3063, generating an electrical signal. Through the electrical signal, the controller controls the drive motor 30512 to start, driving the gear 30511 to rotate. The gear 30511 meshes with the tooth groove 30510, thereby driving the semi-annular limiting sleeve 3057 to rotate outward along the arc guide groove 3058, so that the semi-annular shell 3052 and the semi-annular limiting sleeve 3057 clamp the limiting rod 3061. After the semi-circular limiting sleeve 3057 rotates outward, when it passes the protrusion 3064, it exerts a squeezing force on the protrusion 3064, thereby pushing the two limiting rods 3061 closer together. When it moves to the limit position, the first limiting arc plate 3062 contacts the side wall of the semi-circular shell 3052, while the end point of the protrusion 3064 contacts the other side wall of the semi-circular limiting sleeve 3057, thus achieving limiting, reducing the movement after stopping at the printing position, and improving printing stability. The two limiting rods 3061 can also move relative to each other under the action of the two connecting rods 30679. When the moving platform 301 moves and stops, there is some movement. Since the two sets of ring sleeves composed of the semi-annular shell 3052 and the semi-annular limiting sleeve 3057 are respectively limited outside the two limiting rods 3061, the synchronous and unidirectional movement of the two sets of ring sleeves and the relative movement of the two limiting rods 3061 are mutually restrictive, thereby achieving the fixation of the moving platform 301. When the two limit rods 3061 approach each other, the pressure block 3065 exerts pressure on the second pressure sensor 3066. After the second pressure sensor 3066 generates an electrical signal, it indicates that the moving platform 301 has been limited and fixed, and then printing is carried out. After printing is completed, the semi-circular limiting sleeve 3057 is driven to retract, and the corresponding electromagnet 306711 is energized to generate a repulsive force on the magnetic block 306710. Under the action of the repulsive force, the longitudinal plate 30678 is pushed to move upward, and then the two limiting rods 30679 are pushed to move away from each other through the two connecting rods 30679. After the two limiting rods 3061 are opened, the moving platform 301 needs to be moved back to the loading position before it can be moved back to the original state.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] 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 alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A digital printing machine with alternating dual-carriage printing, comprising a machine body (1), characterized in that: The machine body (1) is provided with a printing cavity inside, and a material outlet groove (2) is provided on the front of the printing cavity. An alternating printing mechanism is provided inside the printing cavity. The alternating printing mechanism includes two worktable assemblies (3) arranged horizontally side by side. The two worktable assemblies (3) include a first worktable (3a) and a second worktable (3b). Two Y-axis moving modules (4) are installed on the bottom wall of the printing cavity. The two Y-axis moving modules (4) are used to drive the two worktable assemblies (3) to move along the Y-axis respectively. The printing chamber is equipped with two spray carriages (5), which include a treatment liquid spray carriage (5a) and an ink spray carriage (5b). The treatment liquid spray carriage (5a) is located on the side of the ink spray carriage (5b) near the discharge trough (2). The treatment liquid spray carriage (5a) is used to spray treatment liquid, and the ink spray carriage (5b) is used to spray ink. The printing chamber is equipped with two X-axis moving modules (6), which are used to drive the two spray carriages (5) to move along the X-axis.

2. The digital printing machine with alternating dual-carriage printing according to claim 1, characterized in that: The workbench assembly (3) includes a moving platform (301). Two support plates (302) are symmetrically installed on the top of the moving platform (301). Negative pressure holes (303) are uniformly arranged on the upper surface of the support plates (302). Two connecting blocks (304) are installed at the bottom of the moving platform (301). The connecting blocks (304) are connected to the Y-axis moving module (4). A positioning and stabilizing component is provided in the printing cavity of the moving platform (301). The positioning and stabilizing component is used to position the workbench assembly (3) when it moves to the printing position.

3. The digital printing machine with alternating dual-carriage printing according to claim 1, characterized in that: The positioning stabilization component includes a mobile positioning element (305) installed at the bottom of the mobile platform (301), and the mobile positioning element (305) is located between two connecting blocks (304); Two fixed positioning components (306) are provided on the moving path of the moving module (4) along the Y-axis of the moving platform (301). The two fixed positioning components (306) are located below the two moving modules (6) along the X-axis respectively. When the moving platform (301) moves to the locking position of the moving positioning component (305) and the two fixed positioning components (306) respectively, the support plate (302) can move to the bottom of the liquid spraying vehicle (5a) and the ink spraying vehicle (5b) respectively.

4. A digital printing machine with alternating dual-carriage printing according to claim 3, characterized in that: The moving positioning component (305) includes a connecting frame (3051) fixedly installed at the bottom of the moving platform (301). A semi-annular shell (3052) is symmetrically installed on the side of the connecting frame (3051) away from the discharge chute (2). A side plate (3054) is installed on the upper end of the two semi-annular shells (3052) on the side close to each other. A first pressure sensor (3055) is installed on the side of the side plate (3054) away from the discharge chute (2).

5. A digital printing machine with alternating dual-carriage printing according to claim 4, characterized in that: The semi-annular shell (3052) has an arc-shaped groove (3056) inside. Arc-shaped guide grooves (3058) are symmetrically provided on both sides of the arc-shaped groove (3056). A semi-annular limiting sleeve (3057) is movably installed inside the arc-shaped groove (3056). Guide blocks (3059) are symmetrically installed on both sides of the semi-annular limiting sleeve (3057). The two guide blocks (3059) are slidably connected to the two arc-shaped guide grooves (3058) respectively. The semi-annular limiting sleeve (3057) has toothed grooves (30510) at equal angles along the outer wall of the arc. A drive motor (30512) is installed at the top of the semi-annular shell (3052). A gear (30511) is installed on the output shaft of the drive motor (30512). The gear (30511) meshes with the toothed groove (30510).

6. A digital printing machine with alternating dual-carriage printing according to claim 3, characterized in that: The fixed positioning component (306) includes two limiting rods (3061). A first limiting arc plate (3062) and a second limiting arc plate (3063) are symmetrically installed on the outer walls of the two limiting rods (3061). The two second limiting arc plates (3063) are located between the two first limiting arc plates (3062). The first limiting arc plate (3062) is located on the side of the limiting rod (3061) closer to the discharge trough (2), and the second limiting arc plate (3063) is located on the side of the limiting rod (3061) away from the discharge trough (2). A protrusion (3064) is installed on the side of the two second limiting arc plates (3063) that are far away from each other. A relative moving module (3067) is provided below the two limiting rods (3061).

7. A digital printing machine with alternating dual-carriage printing according to claim 6, characterized in that: A pressure block (3065) and a second pressure sensor (3066) are respectively installed at the ends of the two limiting rods (3061) that are close to each other.

8. A digital printing machine with alternating dual-carriage printing according to claim 6, characterized in that: The relative movement module (3067) includes a fixed box (30671) disposed below the two limiting rods (3061). The fixed box (30671) is installed on the bottom wall of the printing cavity. The inner wall of the fixed box (30671) is provided with a sliding groove (30672). Two sliding seats (30673) are symmetrically slidably installed inside the sliding groove (30672). The two sliding seats (30673) are respectively fixedly connected to the ends of the two limiting rods (3061) that are far apart from each other. A spring (30674) is installed on the side of the two sliding seats (30673) that are far apart from each other. The ends of the two springs (30674) are respectively fixedly connected to the inner walls of the two ends of the sliding groove (30672).

9. A digital printing machine with alternating dual-carriage printing according to claim 8, characterized in that: The fixed box (30671) has an internal groove (30675) inside, which is located below the sliding groove (30672). A connecting groove (30676) is provided between the internal groove (30675) and the sliding groove (30672). A longitudinal rod (30677) is symmetrically installed inside the internal groove (30675). A longitudinal sliding plate (30678) is movably installed inside the internal groove (30675). The longitudinal sliding plate (30678) is slidably connected to the longitudinal rod (30677). A connecting rod (30679) is symmetrically hinged to the top of the longitudinal sliding plate (30678). The tops of the two connecting rods (30679) are respectively hinged to two sliding seats (30673). A magnetic block (306710) is installed at the bottom of the longitudinal sliding plate (30678). An electromagnet (306711) is installed on the inner bottom wall of the internal groove (30675).

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