Ceramic stained paper printing equipment

Abstract

The invention relates to the technical field of printing equipment, provides ceramic stained paper printing equipment, and solves the problem of interlayer pattern offset caused by design defects of existing equipment. The device comprises at least two printing devices which are arranged at intervals. Each printing device comprises a rack. The printing platform is used for placing a printing piece; the screen printing plate is placed on the rack; the ink scraping blade is arranged above the screen printing plate and is used for scraping ink on the screen printing plate; the printing piece image acquisition component is used for acquiring a real-time image of a printing piece before the printing piece passes through the screen printing plate; the controller is used for recording a standard image before the printing piece passes through the screen printing plate and is used for calculating an overprinting error according to the real-time image and standard image data and adjusting the position of the screen printing plate or the position of the printing piece based on the overprinting error; through bidirectional compensation adjustment (longitudinal and transverse) of the screen printing plate and the printing platform, accumulated errors easily generated in the continuous multi-time overprinting process are counteracted.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, and particularly relates to a ceramic transfer printing equipment. Background Art

[0002] Ceramic transfer paper refers to the special printing paper for ceramics that is pasted on the surface of ceramics (or ceramic blanks). It can be divided into underglaze, middle glaze and overglaze, and there are single firing and double firing. Underglaze and middle glaze will never fade, and overglaze can also remain unchanged for more than ten years. There are also some art ceramics (such as home decorations, etc.) that use ink transfer paper without baking.

[0003] ‌Multi-layer overprint ceramic transfer paper‌ refers to the use of multi-layer printing technology on the surface of ceramics to superimpose prints of different colors and patterns together to form a complex and three-dimensional decorative effect. The more complex and delicate the ceramic transfer paper is, the more overprint layers are required. Chinese Patent Publication No. CN118906630A discloses a printing equipment, including a main oil storage cavity for storing excess ink is provided in the printing head, a liquid inlet pipe is communicated with the main oil storage cavity, a main fixing plate is fixedly connected to the liquid inlet pipe, a main scraping plate is slidably connected to the main fixing plate, a negative pressure cavity is provided on the side of the main scraping plate away from the knife back, the negative pressure cavity is communicated with the liquid inlet pipe, and the negative pressure cavity is used to recycle a certain height of ink to the main oil storage cavity; through the linkage design of the main oil storage cavity and the negative pressure cavity, the dynamic recovery of excess ink is realized. However, in the operation of ceramic transfer paper that requires multi-layer overprinting, obvious limitations occur, and cumulative errors are easily generated during multiple overprinting processes, resulting in pattern offset between layers. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention provides a ceramic transfer printing equipment to solve the problem of pattern offset between layers caused by design defects in existing equipment.

[0005] To achieve the above object, the present invention is realized by the following technical solutions: A ceramic transfer printing equipment includes at least two printing devices arranged at intervals. Each of the printing devices includes a frame, and is characterized in that each of the printing devices further includes: A printing platform for placing a printing piece, and an initial mark is provided on the printing piece; A screen plate is placed on the frame, and a marking hole is provided on the screen plate. The marking hole is used to form a marking point on the printing piece. The length direction of the screen plate is defined as the longitudinal direction, and the width direction is defined as the transverse direction; A squeegee is arranged above the screen plate for scraping ink on the screen plate; A printing piece image acquisition component for acquiring a real-time image of the printing piece before passing through the screen plate; A controller that records a standard image of the printed matter before passing through the stencil, used to calculate the overprint error based on the real-time image and the standard image data, and adjust the position of the stencil or the position of the printed matter based on the overprint error; A stencil adjustment mechanism, controlled by the controller, for longitudinally compensating and adjusting the stencil according to the error calculation result; A printing platform adjustment component, controlled by the controller, for transporting the printing platform under the stencil and transversely compensating and adjusting the printing platform according to the error calculation result; A swing arm is provided on one side of the frame. A squeegee driving component is provided on the swing arm, and the squeegee is provided below the squeegee driving component; A lifting component is provided on the squeegee driving component. One side of the stencil is rotatably connected to the swing arm, and the other side of the stencil is detachably connected to the lifting component.

[0006] Further, the controller is configured to: Error calculation, for comparing the initial marking points in the real-time image with the corresponding initial marking points in the standard image, for comparing the marking points in the real-time image with the corresponding marking points in the standard image, and calculating the horizontal and vertical offsets; Compensation strategy, for longitudinally compensating and adjusting the stencil adjustment mechanism and transversely compensating and adjusting the printing platform adjustment component according to the type of offset.

[0007] Further, the stencil adjustment mechanism includes two laterally linear motors driven synchronously, configured to synchronously adjust the lateral position of the stencil.

[0008] Further, the printed matter image acquisition component includes a bracket, a camera provided on the bracket, and a light source provided below the camera.

[0009] Further, the squeegee driving component includes a fixed frame connected to the swing arm, a lead screw provided in the fixed frame, and a sleeve provided on the lead screw.

[0010] Further, a swing arm driving component is provided below the frame. The swing arm driving component includes a swing motor electrically connected to the controller, a first driving rod and a second driving rod. One end of the first driving rod is connected to the driving end of the swing motor, the other end of the first driving rod is connected to one end of the second driving rod, and the other end of the second driving rod is connected to the swing arm.

[0011] Further, the marking hole is cross-shaped or hash-shaped.

[0012] Further, the printed matter image acquisition component is provided on one side of the stencil and above the printing platform adjustment component.

[0013] Furthermore, the printing platform adjusting component includes a sliding cylinder disposed below the printing platform. A central through-hole and several dispersed through-holes are provided on the printing platform. Each of the dispersed through-holes is symmetrically disposed on the periphery of the central through-hole. The size of the central through-hole is larger than that of each of the dispersed through-holes. The central through-hole and each of the dispersed through-holes are connected to a negative pressure device through pipelines.

[0014] Furthermore, a structural net is provided on the central through-hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By arranging at least two independent printing devices at intervals, the present invention realizes a continuous overprinting process, reduces the plate-changing time, improves the efficiency, and performs two-way compensation adjustment (longitudinal + transverse) between the screen plate and the printing platform to offset the cumulative errors easily generated during multiple consecutive overprinting processes. By using the detachable connection of the lifting member to one side of the screen plate, the squeegee and the screen plate can be synchronously lifted by the swing of the swing arm, avoiding the interference of the screen plate on the conveying of the printing platform during continuous printing, and realizing the optimization of the spatial layout.

[0016] 2. The swing arm driving component provided by the present invention adopts the form of cooperation between the first driving rod and the second driving rod, so that the swing amplitude of the swing arm each time is a fixed value, ensuring the stable printing quality.

[0017] 3. The marking points formed by the cross / #-shaped marking holes of the present invention can still be accurately identified during multi-color superimposed printing.

[0018] 4. Through the layout of the central through-hole and the dispersed through-holes, the present invention makes the adsorption force distribution decrease from the center of the conveying plate to the edge. When used for large-size flower paper printing, stable adsorption can be ensured. When used for small-size flower paper printing, the central through-hole can ensure the stable adsorption of the flower paper. Since the size of the dispersed through-holes is small, the energy consumption during operation is extremely low, and there is no need to perform separate opening and closing control on the central through-hole and the dispersed through-holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the printing device according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of the squeegee driving component according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of the swing arm driving component according to an embodiment of the present invention; Figure 4 is a schematic side structural diagram of the printing device according to an embodiment of the present invention; Figure 5 is a schematic structural diagram of the initial state of the swing arm according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of the downward pressure state of the swing arm according to an embodiment of the present invention.

[0020] Explanation of the attached reference numerals: Frame 1; Swing arm drive component 11; Swing motor 111; First drive rod 112; Second drive rod 113; Printing platform 2; Central through hole 21; Dispersion through hole 22; Structure mesh 23; Screen plate 3; Marking hole 31; Doctor blade 4; Printed part image acquisition component 5; Bracket 51; Camera 52; Light source 53; Controller 6; Screen plate adjustment mechanism 7; Printing platform adjustment component 8; Swing arm 9; Doctor blade drive component 91; Fixed frame 911; Lead screw 912; Sleeve 913; Rotating motor 914; Lifting part 92. Detailed implementation manners

[0021] The following will specifically describe the implementation manners of the present invention in combination with specific embodiments, so as to fully understand how the present invention uses technical means to solve technical problems and achieve the implementation process of technical effects and implement accordingly.

[0022] Embodiment: As Figures 1 to 6 shown, a ceramic transfer printing device includes two printing devices arranged at intervals, and each of the printing devices includes a frame 1. Each of the printing devices further includes: A printing platform 2 for placing a printed part (not shown in the figure), and an initial mark is provided on the printed part; A screen plate 3 is placed on the frame 1. A marking hole 31 is provided on the screen plate 3, and the marking hole 31 is cross-shaped. The marking hole 31 is used to form a marking point on the printed part. Define the length direction of the screen plate 3 as the longitudinal direction and the width direction as the transverse direction; A doctor blade 4 is arranged above the screen plate 3 for scraping ink on the screen plate 4; A printed part image acquisition component 5 for acquiring a real-time image of the printed part before passing through the screen plate; A controller 6 records a standard image of the printed part before passing through the screen plate 3, and is used to calculate the overprint error according to the real-time image and the standard image data, and adjust the position of the screen plate 3 or the position of the printed part based on the overprint error; A screen plate adjustment mechanism 7 is controlled by the controller 6 to perform longitudinal compensation adjustment on the screen plate 3 according to the error calculation result; A printing platform adjustment component 8 is controlled by the controller 6 to convey the printing platform 2 below the screen plate 3 and perform transverse compensation adjustment on the printing platform 2 according to the error calculation result; The swing arm 9 is arranged on one side of the frame 1. A doctor blade driving component 91 is arranged on the swing arm 9, and the doctor blade 4 is arranged below the doctor blade driving component 91. A lifting member 92 is arranged on the doctor blade driving component 91. One side of the screen plate 3 is rotatably connected to the swing arm 9, and the other side of the screen plate 3 is detachably connected to the lifting member 92.

[0023] Among them, the controller 6 adopts an integrated multi-core processor, which can be Mitsubishi FX5U-64MT / ES PLC or Beckhoff CX2040, etc., and is purchased from the market, so it will not be elaborated here.

[0024] The controller 6 is configured as follows: Error calculation is used to compare the initial marking points in the real-time image with the corresponding initial marking points in the standard image, and to compare the marking points in the real-time image with the corresponding marking points in the standard image, and calculate the horizontal and vertical offsets. Compensation strategy: According to the type of offset, perform longitudinal compensation adjustment of the screen plate adjustment mechanism 7 and horizontal compensation adjustment of the printing platform adjustment component 8.

[0025] The screen plate adjustment mechanism 7 includes two laterally linear motors driven synchronously, which are configured to synchronously adjust the lateral position of the screen plate 3.

[0026] The printed part image acquisition component 5 includes a bracket 51, a camera 52 arranged on the bracket 51, and a light source 53 arranged below the camera 52. The camera 52 can be a CCD camera or a CMOS camera, etc., and is purchased from the market, so it will not be elaborated here.

[0027] The doctor blade driving component 91 includes a fixed frame 911 connected to the swing arm 9, a lead screw 912 arranged in the fixed frame 911, and a sleeve 913 arranged on the lead screw 912. Among them, the lead screw 912 is driven by a rotating motor 914.

[0028] A swing arm driving component 11 is arranged below the frame 1. The swing arm driving component 11 includes a swing motor 111 electrically connected to the controller 6, a first driving rod 112 and a second driving rod 113. One end of the first driving rod 112 is connected to the driving end of the swing motor 111, the other end of the first driving rod 112 is connected to one end of the second driving rod 113, and the other end of the second driving rod 113 is connected to the swing arm 9. Among them, the first driving rod 112 and the driving end of the swing motor 111 are fixedly connected, and the rest are rotatably connected.

[0029] The swing arm 9 has an initial state and a pressing-down state. When the printing platform 2 is not conveyed below the screen plate 3, the swing arm 9 is in the initial state. When the printing platform 2 is conveyed below the screen plate 3, the swing arm 9 switches from the initial state to the pressing-down state.

[0030] In the initial state, the swing arm 9 drives the screen plate 3 to turn upwards, so that an included angle of 15°-30° is formed between the screen plate 3 and the horizontal plane, preferably 15°, and the printing platform 2 is not conveyed below the screen plate 3.

[0031] In the pressing-down state, the swing arm 9 drives the screen plate 3 to turn downwards, so that the screen plate 3 is horizontal, and the printing platform 2 is conveyed below the screen plate 3.

[0032] The printed part image acquisition component 5 is arranged on one side of the screen plate 3 and above the printing platform adjusting component 8.

[0033] The printing platform adjusting component 8 includes a sliding air cylinder arranged below the printing platform 2. A central through hole 21 and four scattered through holes 22 are arranged on the printing platform 2. The scattered through holes 22 are symmetrically arranged on the periphery of the central through hole 21. The size of the central through hole 21 is larger than that of each scattered through hole 22. The central through hole 21 and each scattered through hole 22 are connected to a negative pressure device (not shown in the figure) through pipelines. Negative pressure adsorption and conveyance are conventional technical means in the art and will not be elaborated here.

[0034] The printing platform 2 is square. The diameter of the central through hole 21 is 1 / 15-1 / 8 of the side length of the printing platform 2, preferably 1 / 10. The diameter of the scattered through hole 22 is 1 / 6-1 / 3 of the diameter of the central through hole 21, preferably 1 / 4.

[0035] In this embodiment, the printing platform 2 is 40 cm×40 cm, the diameter of the central through hole 21 is 4 cm, and the diameter of the scattered through hole 22 is 1 cm.

[0036] In other preferred embodiments, the printing platform 2 is 50 cm×50 cm, the diameter of the central through hole 21 is 5 cm, and the diameter of the scattered through hole 22 is 1 cm.

[0037] In other preferred embodiments, the printing platform 2 can also be rectangular, and the diameter of the central through hole 21 is 1 / 15-1 / 8 of the long side of the printing platform 2.

[0038] A structure net 23 is arranged on the central through hole 21. The design of the structure net 23 can prevent the flower paper from being sunken due to negative pressure adsorption at the central through hole 21 with a larger aperture. When the diameter of the scattered through hole 22 exceeds 2 cm, the structure net 23 also needs to be arranged.

[0039] Taking two spaced printing devices as an example, at the beginning, the standard images of the printed piece before passing through the stencils 3 of the two printing devices are recorded. The printed piece is placed on the printing platform 2 of the first printing device, and its real-time image is collected by the printed piece image acquisition component 5. The initial mark position on the real-time image is captured and compared with the initial mark position on the standard image to calculate the horizontal and vertical offsets. The printing platform adjustment component 8 conveys the printing platform to below the stencil 3 according to the horizontal offset, and the stencil adjustment mechanism 7 adjusts the position of the stencil 3 according to the vertical offset. Then, the swing arm 9 switches from the initial state to the pressing state. After printing is completed, the swing arm 9 switches from the pressing state to the initial state, and the printed piece is transported to the printing platform 2 of the second printing device, and the operation is repeated.

[0040] The transportation of the printed piece on each printing platform 2 can be realized manually or by using a negative pressure adsorption transportation device (not shown in the figure). The negative pressure adsorption transportation device is purchased from the market and will not be elaborated here.

[0041] The marking holes 31 on the stencils 3 of different printing devices are located at different positions to avoid the unclear marking points caused by the ink bleeding after multiple overprintings.

[0042] The standard image recorded by the printed piece image acquisition component 5 is used not only for comparison with the real-time image, but also for generating the standard distance for conveying the printing platform 2 to below the stencil 3 and the standard position of the stencil 3 on the stencil adjustment mechanism 7.

[0043] Although the present invention is specifically shown and described in combination with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. A ceramic decal printing device, comprising at least two printing devices arranged at intervals, each of the printing devices including a frame, characterized in that, Each of the printing devices further includes: A printing platform for placing a printing piece, with an initial mark provided on the printing piece; A screen plate placed on the frame, with a marking hole provided on the screen plate, and the marking hole is used to form a marking point on the printing piece. Define the length direction of the screen plate as the longitudinal direction and the width direction as the transverse direction; A squeegee disposed above the screen plate for scraping ink on the screen plate; A printing piece image acquisition component for acquiring a real-time image of the printing piece before passing through the screen plate; A controller that records a standard image of the printing piece before passing through the screen plate, and is used to calculate the overprint error based on the real-time image and the standard image data, and adjust the position of the screen plate or the position of the printing piece based on the overprint error; A screen plate adjustment mechanism controlled by the controller to perform longitudinal compensation adjustment on the screen plate according to the error calculation result; A printing platform adjustment component controlled by the controller to convey the printing platform below the screen plate and perform transverse compensation adjustment on the printing platform according to the error calculation result; A swing arm swingably disposed on one side of the frame, with a squeegee driving component provided on the swing arm, and the squeegee is disposed below the squeegee driving component. When the printing platform is conveyed below the screen plate, the swing arm controls the squeegee to swing downward; A lifting member provided on the squeegee driving component, one side of the screen plate is rotatably connected to the swing arm, and the other side of the screen plate is detachably connected to the lifting member.

2. The ceramic transfer printing device according to claim 1, characterized in that, The controller is configured to: Error calculation, for comparing the initial marking points in the real-time image with the corresponding initial marking points in the standard image, for comparing the marking points in the real-time image with the corresponding marking points in the standard image, and calculating the transverse and longitudinal offset amounts; Compensation strategy, performing longitudinal compensation adjustment of the screen plate adjustment mechanism and transverse compensation adjustment of the printing platform adjustment component according to the type of offset amount.

3. The ceramic transfer printing device according to claim 1, characterized in that, The screen plate adjustment mechanism includes two laterally linear motors driven synchronously, configured to synchronously adjust the lateral position of the screen plate.

4. A ceramic transfer printing device according to claim 1, characterized in that, The printing piece image acquisition component includes a bracket, a camera provided on the bracket, and a light source provided below the camera.

5. A ceramic flower paper printing device according to claim 1, characterized in that: The squeegee driving component includes a fixed frame connected to the swing arm, a lead screw provided in the fixed frame, and a sleeve provided on the lead screw.

6. The ceramic flower paper printing equipment according to claim 1, characterized in that: A swing arm driving component is provided below the frame, and the swing arm driving component includes a swing motor electrically connected to the controller, a first driving rod and a second driving rod. One end of the first driving rod is connected to the driving end of the swing motor, the other end of the first driving rod is connected to one end of the second driving rod, and the other end of the second driving rod is connected to the swing arm.

7. A ceramic transfer printing device according to claim 1, characterized in that: The marking hole is in a cross shape or a hash shape.

8. A ceramic transfer printing device according to claim 1, characterized in that: The printing piece image acquisition component is disposed on one side of the screen plate and above the printing platform adjustment component.

9. The ceramic transfer printing device according to claim 1, wherein: The printing platform adjustment component includes a sliding cylinder provided below the printing platform. A central through hole and a plurality of dispersed through holes are provided on the printing platform. Each of the dispersed through holes is symmetrically disposed on the periphery of the central through hole. The size of the central through hole is larger than that of each of the dispersed through holes. The central through hole and each of the dispersed through holes are connected to a negative pressure device through a pipeline.

10. A ceramic flower paper printing device according to claim 9, characterized in that: A structural net is provided on the central through hole.

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