Keyboard circuit printing line
By integrating multiple processes into a single keyboard circuit printing line, and employing a fully automated process and a specially designed screen printing stencil, the problems of high cost, low efficiency, and unstable quality of existing single-process printing technology have been solved, achieving efficient and low-cost keyboard circuit production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU SIPULANDI ELECTRONICS CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-05-19
AI Technical Summary
Existing single-process printing technology results in high screen printing costs, limited equipment resources, long production cycles, low equipment utilization, high labor costs, and unstable product quality.
Design a keyboard circuit printing line that integrates multiple processes into one production line. The line adopts a fully automated process, using a special screen printing stencil to print both jump silver dots and secondary silver dots simultaneously, and then uses ultraviolet light and a snail dryer for drying.
It has achieved fully automated production, improved production efficiency, reduced screen printing and labor costs, increased equipment utilization and product quality, and shortened the production cycle.
Smart Images
Figure CN224256283U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of keyboard circuit printing equipment, and in particular to a keyboard circuit printing line. Background Technology
[0002] In the field of circuit printing, single-process printing technology is currently widely used. Its process flow is: silver wire - carbon - UV1 - UV2 - skip silver - secondary silver dots - color frame - waterproof adhesive 1st coat - waterproof adhesive 2nd coat. This technology, by breaking down the printing process into multiple independent steps, enables precise control over printing details and, to a certain extent, meets the printing requirements of products.
[0003] However, this single-process printing technology has many drawbacks. First, because each process requires a separate screen printing plate, the cost of the screen printing plate increases significantly, greatly increasing the initial capital investment in production. Second, each process requires independent printing equipment, leading to a shortage of equipment resources, occupying a large amount of production space, and resulting in low equipment utilization. Third, each additional independent process introduces new quality-influencing factors, significantly increasing the overall risk of printing defects and making it difficult to guarantee product qualification rates. Fourth, the sequential execution of multiple single processes results in a lengthy production cycle, extremely low production efficiency, and difficulty in improving overall output. Finally, maintaining the normal operation of each process requires a large number of operators, resulting in high labor costs. In summary, the existing single-process printing technology has significant deficiencies in cost control, equipment utilization, production efficiency, and product quality assurance, and urgently needs improvement and optimization. Utility Model Content
[0004] The technical problem solved by this utility model is to provide a keyboard circuit printing line that enables fully automatic printing and reduces manual intervention.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a keyboard circuit printing line, comprising a feeding machine, a first printing machine for printing silver lines, a first snail dryer for drying, a second printing machine for carbon layer printing, a second snail dryer for drying, a third printing machine for printing a first layer of UV adhesive, a first UV dryer for drying the UV adhesive, a fourth printing machine for printing a second layer of UV adhesive, a second UV dryer for drying the UV adhesive, a fifth printing machine for printing silver jumps and secondary silver dots, a third snail dryer for drying, a sixth printing machine for printing color frames, and a fourth snail dryer for drying.
[0006] It also includes screen printing stencils for use with the fifth printing press.
[0007] Furthermore, the screen printing stencil includes a frame, within which a mesh fabric layer is disposed. The mesh fabric layer includes a silver dot printing area and a secondary silver dot printing area. The silver dot printing area and the secondary silver dot printing area are respectively provided with a first printing hole structure and a second printing hole structure corresponding to the positions of the silver dots and secondary silver dots of the product to be printed. An emulsion layer is coated on the mesh fabric layer, and the thickness of the emulsion layer at the silver dot printing area and the secondary silver dot printing area is different.
[0008] Furthermore, the mesh layer is a 200-mesh mesh.
[0009] Furthermore, the printing of both the initial silver dots and the secondary silver dots is performed simultaneously using a screen printing stencil, resulting in different thicknesses for the printed initial silver dots and secondary silver dots.
[0010] Furthermore, both the first and second UV dryers are ultraviolet dryers.
[0011] The beneficial effects of this utility model are:
[0012] 1. This structure integrates multiple processes onto a single printing line, achieving a fully automated production process from silver thread printing to waterproof adhesive coating, significantly improving production efficiency.
[0013] 2. The design of the screen printing stencil results in different emulsion layer thicknesses in the skip silver dot printing area and the secondary silver dot printing area, thus achieving a difference in thickness between the skip silver dots and the secondary silver dots after printing. This reduces printing steps, saving both a screen and silver paste consumption. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the printed lines of the keyboard circuit according to an embodiment of this application.
[0015] Figure 2 This is a schematic diagram of the structure of a screen printing stencil according to an embodiment of this application.
[0016] The diagram is labeled as follows: 1. Feeder; 2. First printing machine; 3. First snail dryer; 4. Second printing machine; 5. Second snail dryer; 6. Third printing machine; 7. First UV dryer; 8. Fourth printing machine; 9. Second UV dryer; 10. Fifth printing machine; 11. Third snail dryer; 12. Sixth printing machine; 13. Fourth snail dryer; 14. Silver dot printing area; 15. Secondary silver dot printing area; 16. First printing hole structure; 17. Second printing hole structure. Detailed Implementation
[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0018] like Figure 1 As shown, an embodiment of this application discloses a keyboard circuit printing line, including a feeding machine 1, a first printing machine 2 for printing silver lines, a first snail dryer 3 for drying, a second printing machine 4 for carbon layer printing, a second snail dryer 5 for drying, a third printing machine 6 for printing a first layer of UV adhesive, a first UV dryer 7 for drying the UV adhesive, a fourth printing machine 8 for printing a second layer of UV adhesive, a second UV dryer 9 for drying the UV adhesive, a fifth printing machine 10 for printing silver skipping and secondary silver dot printing, a third snail dryer 11 for drying, a sixth printing machine 12 for printing color frames, and a fourth snail dryer 13 for drying.
[0019] It also includes a screen printing stencil for use with the fifth printing press 10.
[0020] In the specific operation, firstly, the keyboard circuit material to be printed is fed into the production line via the feeder 1. Next, on the first printing machine 2, silver wires are precisely printed onto the material to form conductive lines. Subsequently, the first snail dryer 3 dries the printed silver wires to ensure they adhere firmly to the material.
[0021] Next, the material enters the second printing press 4 for carbon layer printing to enhance the conductivity and stability of the circuit. Following this, the second snail dryer 5 dries the carbon layer. Next, the third printing press 6 prints UV adhesive onto the material in the first UV adhesive printing area to protect the circuit and increase its durability. The first UV dryer 7 then dries the printed UV adhesive.
[0022] Then, the fourth printing press 8 prints UV adhesive again in the second UV adhesive printing area to further reinforce the circuit's protective layer. The second UV dryer 9 dries this layer of UV adhesive. Afterward, the material enters the fifth printing press 10, a crucial part of the entire printing line. Here, a specially designed screen printing stencil is used to simultaneously print jump silver dots and secondary silver dots. The different printing hole structures on the stencil ensure that the jump silver dots and secondary silver dots are precisely printed in the required positions, with varying thicknesses to meet the complex requirements of the circuit design.
[0023] After printing, the third snail dryer 11 dries the skipped silver dots and secondary silver dots. Then, the sixth printing press 12 prints color frames on the material, adding visual identification to the keyboard circuitry. Finally, the fourth snail dryer 13 dries the color frames to ensure all printed layers adhere firmly to the material.
[0024] In this structure, the entire printing line achieves a fully automated printing process from material feeding to final product output, greatly reducing manual intervention and improving production efficiency and product quality. Simultaneously, by integrating multiple printing processes, it reduces screen printing costs and equipment occupancy, improves equipment utilization, shortens the production cycle, lowers labor costs, and achieves significant optimization of keyboard circuit printing technology.
[0025] In this embodiment, the screen printing stencil includes a frame, and a mesh fabric layer is disposed within the frame. The mesh fabric layer includes a silver dot printing area 14 and a secondary silver dot printing area 15. The silver dot printing area 14 and the secondary silver dot printing area 15 are respectively provided with a first printing hole structure 16 and a second printing hole structure 17 corresponding to the positions of the silver dots and secondary silver dots of the product to be printed. An emulsion layer is coated on the mesh fabric layer, and the thickness of the emulsion layer at the silver dot printing area 14 and the secondary silver dot printing area 15 is different.
[0026] In practice, because the required printing thicknesses for the jump silver dots and secondary silver dots are different, the emulsion layer thicknesses in the jump silver dot printing area 14 and the secondary silver dot printing area 15 are different. This allows the ink to form jump silver dots and secondary silver dots of varying thicknesses based on the emulsion layer thickness differences in different areas during the printing process. For example, in the jump silver dot printing area 14, the emulsion layer is relatively thin, perhaps 7µm, allowing the ink to penetrate more easily through the first printing hole structure 16, thus forming thicker jump silver dots on the material. In the secondary silver dot printing area 15, the emulsion layer is relatively thicker, perhaps 18µm, hindering ink penetration to some extent, resulting in relatively thinner secondary silver dots formed through the second printing hole structure 17. This design of varying emulsion layer thickness ensures that the jump silver dots and secondary silver dots precisely achieve the required thickness according to the circuit design requirements, thereby improving the conductivity and stability of the keyboard circuit.
[0027] In this embodiment, the mesh layer is a 200-mesh mesh.
[0028] Specifically, the original structure requires two printing processes: printing the initial silver dots and the secondary silver dots. Therefore, two screen printing stencils are needed, with 200-mesh and 300-mesh screens respectively. Since 200-mesh screens are sufficient for the printing accuracy requirements of both initial and secondary silver dots, and to reduce production costs and improve printing efficiency, this embodiment uses 200-mesh screens uniformly. In practical applications, by adjusting parameters such as printing pressure and ink viscosity, accurate printing of initial and secondary silver dots on a 200-mesh screen can be ensured, while achieving the required thickness difference.
[0029] In this embodiment, the first UV dryer 7 and the second UV dryer 9 are ultraviolet dryers.
[0030] Specifically, UV dryers are characterized by high efficiency, environmental friendliness, and energy saving, enabling rapid curing of UV adhesives and improving production efficiency. In practical applications, the light source intensity and irradiation time of the UV dryer can be adjusted according to the type and thickness of the UV adhesive to ensure complete curing while avoiding excessive irradiation that could lead to material aging or deformation. This flexibility and controllability make UV dryers an ideal choice for keyboard circuit printing lines.
[0031] Furthermore, the first snail dryer 3, the second snail dryer 5, the third snail dryer 11, and the fourth snail dryer 13 all employ snail-type thermal drying technology, featuring uniform heating and energy efficiency. The heating elements of the snail dryer are evenly distributed within the drying chamber, ensuring uniform heating of the material during the drying process and avoiding localized overheating or insufficient drying. Simultaneously, the snail dryer boasts high thermal efficiency, rapidly evaporating moisture or solvents from the material, shortening drying time, and improving production efficiency. In practical applications, the heating temperature and drying time of the snail dryer can be adjusted according to the type of material and drying requirements to achieve the optimal drying effect.
[0032] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A keyboard circuit printed line, characterized in that: The system includes, in sequence, a feeding machine (1), a first printing machine for printing silver lines (2), a first snail dryer for drying (3), a second printing machine for carbon layer printing (4), a second snail dryer for drying (5), a third printing machine for printing the first layer of UV adhesive (6), a first UV dryer for drying the UV adhesive (7), a fourth printing machine for printing the second layer of UV adhesive (8), a second UV dryer for drying the UV adhesive (9), a fifth printing machine for printing silver skipping and secondary silver dot printing (10), a third snail dryer for drying (11), a sixth printing machine for printing color frames (12), and a fourth snail dryer for drying (13). It also includes a screen printing stencil for use with the fifth printing press (10).
2. The keyboard circuit printed line as described in claim 1, characterized in that: The screen printing stencil includes a frame, and a mesh layer is provided inside the frame. The mesh layer includes a silver dot printing area (14) and a secondary silver dot printing area (15). The silver dot printing area (14) and the secondary silver dot printing area (15) are respectively provided with a first printing hole structure (16) and a second printing hole structure (17) corresponding to the positions of the silver dots and secondary silver dots of the product to be printed. An emulsion layer is coated on the mesh layer, and the thickness of the emulsion layer at the silver dot printing area (14) and the secondary silver dot printing area (15) is different.
3. The keyboard circuit printed line as described in claim 2, characterized in that: The mesh layer is a 200-mesh mesh.
4. The keyboard circuit printed line as described in claim 2, characterized in that: The printing of silver dots and secondary silver dots is carried out simultaneously by screen printing stencils, and the thickness of the printed silver dots and secondary silver dots is different.
5. The keyboard circuit printed line as described in claim 1, characterized in that: The first UV dryer (7) and the second UV dryer (9) are ultraviolet dryers.