A mobile phone cover plate silk printing device

Abstract

This invention relates to the field of screen printing equipment technology, and particularly to a screen printing device for mobile phone cover plates, comprising a base, a worktable, a clamping mechanism, a printing assembly, and a control assembly; a vertically arranged guide rail module is mounted on the base; the worktable includes a base plate, a base, and an alignment mechanism, with the base plate fixedly mounted on the base, and the base equipped with an X / Y fine-tuning mechanism; the printing assembly includes a squeegee module, an ink return module, and a transverse guide rail module, with the squeegee module and the ink return module slidably mounted on the transverse guide rail module. This invention achieves high-precision automatic compensation through a CCD alignment camera and an X / Y fine-tuning mechanism, significantly improving alignment accuracy; the clamping mechanism and vacuum suction holes can flexibly adapt to different sizes of screen frames and various thicknesses of mobile phone cover plates, enhancing equipment versatility and line change efficiency; the squeegee module has a built-in pressure sensor and angle adjustment mechanism to ensure uniform and stable ink layer; the ink return module has anti-drip blocks at both ends to effectively prevent ink contamination and improve yield.

Description

Technical Field

[0001] This invention relates to the field of screen printing equipment technology, and in particular to a screen printing device for mobile phone cover plates. Background Technology

[0002] In the manufacturing process of mobile phone cover plates, screen printing is a crucial step for printing logos, decorative patterns, or functional coatings. Traditional screen printing equipment typically includes a base, worktable, clamping mechanism, and printing components. However, existing technologies generally suffer from the following problems: Insufficient alignment accuracy: Traditional devices rely on manual alignment or mechanical positioning, which is difficult to meet the needs of high-precision printing and is prone to problems such as printing misalignment and misregistration. Poor adaptability: Existing clamping mechanisms are mostly fixed structures, which cannot flexibly adapt to different sizes of wire frames or different thicknesses of mobile phone cover plates, resulting in low line changing efficiency and poor equipment versatility; Unstable printing quality: Key parameters such as squeegee pressure and angle rely heavily on manual experience for adjustment, lacking digital control, which can easily lead to quality problems such as uneven ink layer and scratched products.

[0003] Ink contamination risk: During the ink return process, ink is prone to dripping, contaminating the surface of the cover plate and affecting the yield rate.

[0004] Low level of automation: The overall equipment has a low degree of automation integration in loading and unloading, alignment compensation, pressure regulation, etc., making it difficult to meet the needs of efficient and intelligent production.

[0005] Therefore, it is particularly urgent and necessary to develop a screen printing device for mobile phone cover plates with a reasonable structure and strong adaptability. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a screen printing device for mobile phone cover plates, which has good practicality and solves the above-mentioned problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a screen printing device for mobile phone cover plates, comprising a base, a worktable, a clamping mechanism, a printing component, and a control component; a vertically arranged guide rail module is mounted on the base; the worktable includes a base plate, a base, and an alignment mechanism, the base plate being fixedly mounted on the base, and the base being provided with an X / Y fine-tuning mechanism; the printing component includes a squeegee module, an ink return module, and a transverse guide rail module, the squeegee module and the ink return module being slidably mounted on the transverse guide rail module respectively.

[0008] Preferably, the clamping mechanism includes a clamping beam, a locking mechanism, and a lifting assembly. The clamping beam is slidably connected to the guide rail module through the lifting assembly, and the locking mechanism includes multiple sets of locking blocks disposed on the clamping beam.

[0009] Preferably, each set of locking blocks is provided with a locking element and an elastic pressure block. The locking block can slide vertically along the clamping beam and be locked by the locking element to adapt to different sizes of wire mesh frames.

[0010] Preferably, the lifting assembly is a lead screw module driven by a servo motor, the output end of which is fixedly connected to the mesh arm and used to drive the clamping beam to rise and fall along the guide rail module.

[0011] Preferably, the alignment mechanism includes a CCD alignment camera, which is fixedly installed on the side of the base plate and signal-connected to the control component, for acquiring positional images of the workpiece and the screen to achieve automatic alignment compensation.

[0012] Preferably, the X / Y fine-tuning mechanism is driven by adjusting the handwheel to adjust the planar position of the base plate relative to the screen.

[0013] Preferably, the scraper module is equipped with a pressure sensor and a scraper angle adjustment mechanism, which are electrically connected to the control component to digitally adjust the scraper pressure and scraper angle.

[0014] Preferably, the ink return module is provided with anti-drip blocks at both ends, and the anti-drip blocks are provided with a guide slope on the side facing the phone cover to receive and prevent ink drips from contaminating the phone cover during ink return.

[0015] Preferably, the transverse guide rail module is driven by a linear motor, and its mover is fixedly connected to the doctor blade module and the ink return module respectively, so as to drive the doctor blade and the ink return blade to reciprocate along the printing direction.

[0016] Preferably, the upper surface of the base plate is arrayed with multiple vacuum adsorption holes, which are connected to an external vacuum source through pipelines, and the pipelines are equipped with adjustable valves to adjust the vacuum level to adapt to mobile phone cover plates of different thicknesses.

[0017] Compared with existing technologies, this invention achieves high-precision automatic compensation through a CCD alignment camera and X / Y-axis fine-tuning mechanism, significantly improving alignment accuracy. The clamping mechanism and vacuum suction holes can flexibly adapt to different sizes of screen frames and various thicknesses of mobile phone cover plates, enhancing equipment versatility and line change efficiency. The doctor blade module incorporates a pressure sensor and angle adjustment mechanism, enabling digital closed-loop control of printing parameters to ensure uniform and stable ink layer. The ink return module has anti-drip blocks at both ends to effectively prevent ink contamination and improve yield. The linear motor-driven transverse guide rail module operates smoothly and responds quickly. Combined with the unified scheduling of the control components, the overall structure has a high degree of integration, facilitating automated and intelligent production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the screen printing device for mobile phone cover plates according to the present invention; Figure 2 This is a front view of the screen printing device for mobile phone cover plates according to the present invention; Figure 3 for Figure 1 Enlarged view of point A in the middle; Figure 4 for Figure 1 Enlarged view of point B in the middle; Figure 5 for Figure 2 Enlarged view of point C in the middle; Figure 6 for Figure 2 Enlarged view at point D; Figure 7 This is a schematic diagram of the workbench structure in this invention.

[0019] In the diagram: 1. Base; 101. Guide rail module; 2. Worktable; 201. Base plate; 2011. Vacuum adsorption hole; 202. Base; 2021. X / Y fine adjustment mechanism; 203. Alignment mechanism; 2031. CCD alignment camera; 3. Clamping mechanism; 301. Clamping beam; 302. Locking mechanism; 3021. Locking block; 3022. Locking block; 3023. Locking component; 303. Lifting assembly; 304. Screen arm; 4. Printing assembly; 401. Squeegee module; 402. Ink return module; 4021. Anti-drip block; 403. Horizontal guide rail module. Detailed Implementation

[0020] 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.

[0021] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0022] Please see Figures 1 to 7 This application provides a screen printing device for a mobile phone cover plate, including a base 1, a worktable 2, a clamping mechanism 3, a printing component 4, and a control component; a vertically arranged guide rail module 101 is installed on the base 1; the worktable 2 includes a base plate 201, a base 202, and an alignment mechanism 203, the base plate 201 is fixedly installed on the base 202, and the base 202 is provided with an X / Y fine adjustment mechanism 2021; the printing component 4 includes a squeegee module 401, an ink return module 402, and a horizontal guide rail module 403, the squeegee module 401 and the ink return module 402 are respectively slidably arranged on the horizontal guide rail module 403.

[0023] The present invention aims to provide a screen printing device for mobile phone cover plates. Its working principle is based on the coordinated operation of automated control and precision mechanical structures. The specific workflow is as follows: The mobile phone cover plate to be printed is placed on the base plate 201 of the worktable. Before printing begins, a CCD alignment camera 2031 installed on the side of the base plate 201 acquires positional images of the workpiece and the screen above, and transmits the image signals to the control component. The control component calculates the relative positional deviation between the workpiece and the screen using an image processing algorithm, and then controls the adjustment handwheel to fine-tune the X / Y fine-tuning mechanism 2021 on the base 202, compensating for minor displacement of the base plate 201, so that the workpiece and the screen pattern are precisely aligned. The screen frame carrying the cover plate is fixed by the clamping mechanism 3. Multiple sets of locking blocks 3021 are provided on the clamping beam 301. Each set of locking blocks can slide vertically along the clamping beam 301 and is locked by locking elements 3022 to accommodate screen frames of different sizes. The elastic pressure block 3023 provides elastic cushioning during locking to prevent damage to the screen frame. The lifting assembly 303 uses a servo motor-driven lead screw module, whose output end is fixedly connected to the screen arm 304. Under the command of the control component, it drives the clamping beam 301 to precisely lift and lower along the guide rail module 101, realizing the contact and separation of the screen and the workpiece. Under the control of the control component, the linear motor drives the squeegee module 401 to move along the printing direction. The squeegee transfers the ink on the screen through the pattern area to the surface of the mobile phone cover, completing the printing. After printing, the ink return module 402 moves in the opposite direction, evenly pushing the remaining ink back to the initial position. The squeegee module 401 is equipped with a pressure sensor and a squeegee angle adjustment mechanism, both of which are electrically connected to the control component. During the printing process, the pressure sensor monitors the contact pressure between the squeegee and the screen in real time and feeds the data back to the control component. The control component dynamically adjusts the squeegee angle via a squeegee angle adjustment mechanism based on preset parameters and real-time feedback. Simultaneously, it adjusts the drive parameters of the linear motor to achieve digital closed-loop control of the squeegee pressure and angle, ensuring a uniform and consistent ink layer during printing. After one printing cycle, the lifting component 303 raises the screen frame, separating the screen from the workpiece.

[0024] like Figure 2 and Figure 5 As shown, the clamping mechanism 3 includes a clamping beam 301, a locking mechanism 302, and a lifting assembly 303. The clamping beam 301 is slidably connected to the guide rail module 101 through the lifting assembly 303, and can be precisely lifted and lowered in the vertical direction to ensure accurate fit and separation between the screen and the workpiece. The locking mechanism 302 includes multiple sets of locking blocks 3021 set on the clamping beam 301 to prevent the screen frame from shifting or deforming during the printing process, thereby improving printing stability.

[0025] Based on this, such as Figure 4As shown, each locking block 3021 is equipped with a locking element 3022 and an elastic pressure block 3023. The locking block 3021 can slide vertically along the clamping beam 301 and be locked by the locking element 3022 to adapt to different sizes of wire mesh frames.

[0026] Based on this, the lifting assembly 303 is a lead screw module driven by a servo motor. Its output end is fixedly connected to the net arm 304, which can realize high-precision and high-response speed lifting control, and drive the clamping beam 301 to rise and fall along the guide rail module 101.

[0027] like Figure 2 As shown, the alignment mechanism 203 includes a CCD alignment camera 2031, which is fixedly installed on the side of the base plate 201 and connected to the control components for signal acquisition of the position images of the workpiece and the screen to achieve automatic alignment compensation. Compared with traditional mechanical alignment or manual alignment, CCD visual alignment has higher accuracy and faster response, and can effectively eliminate printing offset caused by workpiece placement deviation or screen installation error.

[0028] In this invention, the X / Y fine-tuning mechanism 2021 is driven by adjusting the handwheel. It has a simple structure and intuitive operation, making it easy for operators to manually fine-tune during the alignment process. It is used to adjust the planar position of the base plate 201 relative to the screen.

[0029] In this invention, the doctor blade module 401 is equipped with a pressure sensor and a doctor blade angle adjustment mechanism, which are electrically connected to the control components. Compared with the traditional method of relying on manual experience for adjustment, it can monitor and automatically optimize printing parameters in real time, ensuring that the contact state between the doctor blade and the screen is always within the optimal range, thereby ensuring uniform ink layer, clear printing, reducing printing defects, and digitally adjusting the doctor blade pressure and doctor blade angle.

[0030] like Figure 6 As shown, the ink return module 402 is provided with anti-drip blocks 4021 at both ends. The anti-drip blocks 4021 have a guide slope on the side facing the mobile phone cover plate, which is used to receive and prevent ink drips from contaminating the mobile phone cover plate during ink return. During the ink return process, this structure can effectively receive the ink overflowing from both ends of the ink return blade and guide the ink back to the screen working area through the guide slope, preventing ink drips from contaminating the surface of the printed or unprinted mobile phone cover plate.

[0031] In this invention, the transverse guide rail module 403 is driven by a linear motor, and its mover is fixedly connected to the doctor blade module 401 and the ink return module 402 respectively. It is used to drive the doctor blade and the ink return blade to reciprocate along the printing direction, which can realize the high-speed reciprocating motion of the doctor blade and the ink return blade, while ensuring the stability of speed and pressure during the printing process.

[0032] like Figure 7As shown, the upper surface of the base plate 201 has an array of multiple vacuum adsorption holes 2011. The vacuum adsorption holes 2011 are connected to an external vacuum source through pipelines, and the pipelines are equipped with adjustable valves to adjust the vacuum level to adapt to mobile phone cover plates of different thicknesses. The vacuum level can be adjusted according to the thickness of the mobile phone cover plate to achieve reliable adsorption of workpieces of different thicknesses and prevent workpiece displacement during the printing process. The array distribution ensures uniform adsorption force and avoids deformation of thin cover plates due to uneven local force, thereby improving the stability and adaptability of workpiece fixation.

[0033] It should be noted that, in this document, the terms "left," "right," "front," "rear," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, 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 a process, method, article, or apparatus.

[0034] 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 screen printing device for a mobile phone cover plate, characterized in that, The system includes a base (1), a worktable (2), a clamping mechanism (3), a printing assembly (4), and a control assembly. A vertically arranged guide rail module (101) is installed on the base (1). The worktable (2) includes a base plate (201), a base (202), and an alignment mechanism (203). The base plate (201) is fixedly installed on the base (202), and the base (202) is provided with an X / Y fine adjustment mechanism (2021). The printing assembly (4) includes a doctor blade module (401), an ink return module (402), and a horizontal guide rail module (403). The doctor blade module (401) and the ink return module (402) are slidably arranged on the horizontal guide rail module (403).

2. The screen printing device for a mobile phone cover plate according to claim 1, characterized in that, The clamping mechanism (3) includes a clamping beam (301), a locking mechanism (302) and a lifting assembly (303). The clamping beam (301) is slidably connected to the guide rail module (101) through the lifting assembly (303). The locking mechanism (302) includes multiple sets of locking blocks (3021) disposed on the clamping beam (301).

3. The screen printing device for a mobile phone cover plate according to claim 2, characterized in that, Each locking block (3021) is provided with a locking element (3022) and an elastic pressure block (3023). The locking block (3021) can slide vertically along the clamping beam (301) and be locked by the locking element (3022) to adapt to different sizes of wire mesh frames.

4. The screen printing device for a mobile phone cover plate according to claim 2, characterized in that, The lifting assembly (303) is a servo motor driven lead screw module, whose output end is fixedly connected to the net arm (304) and is used to drive the clamping beam (301) to rise and fall along the guide rail module (101).

5. The screen printing device for a mobile phone cover plate according to claim 1, characterized in that, The alignment mechanism (203) includes a CCD alignment camera (2031), which is fixedly installed on the side of the base plate (201) and connected to the control component for signal acquisition of position images of the workpiece and the screen to achieve automatic alignment compensation.

6. The screen printing device for a mobile phone cover plate according to claim 1, characterized in that, The X / Y fine-tuning mechanism (2021) is used to adjust the planar position of the base plate (201) relative to the screen by adjusting the handwheel drive.

7. The screen printing device for a mobile phone cover plate according to claim 1, characterized in that, The scraper module (401) is equipped with a pressure sensor and a scraper angle adjustment mechanism, which are electrically connected to the control component to digitally adjust the scraper pressure and scraper angle.

8. The screen printing device for a mobile phone cover plate according to claim 1, characterized in that, The ink return module (402) is provided with anti-drip blocks (4021) at both ends. The anti-drip blocks (4021) have a guide slope on the side facing the mobile phone cover, which is used to receive and prevent ink from dripping and contaminating the mobile phone cover during ink return.

9. The screen printing device for a mobile phone cover plate according to claim 1, characterized in that, The transverse guide rail module (403) is driven by a linear motor, and its mover is fixedly connected to the doctor blade module (401) and the ink return module (402) respectively, and is used to drive the doctor blade and the ink return blade to reciprocate along the printing direction.

10. The screen printing device for a mobile phone cover plate according to claim 1, characterized in that, The upper surface of the base plate (201) is arrayed with multiple vacuum adsorption holes (2011). The vacuum adsorption holes (2011) are connected to an external vacuum source through pipelines, and the pipelines are equipped with adjustable valves to adjust the vacuum level to adapt to mobile phone cover plates of different thicknesses.

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