Single-sided panel hot set ink printing jig

Abstract

The utility model relates to the field of flexible circuit board manufacturing discloses a single -sided board thermosetting ink printing fixture, including the board body, a plurality of air suction mouths are opened in the board body top, the board body all around is opened and is equipped with the positioning hole, the board body rear side all around is fixedly connected with first adhesive tape, five second adhesive tapes are fixedly connected between the first adhesive tape, the second adhesive tape includes base material layer, adhesive layer, release layer, primer layer, the adhesive layer fixedly connected in base material layer inner wall, release layer fixedly connected in adhesive layer inner wall, release layer fixedly connected in adhesive layer inner wall. In the utility model, the air suction mouth is designed as small diameter 0.3mm and is evenly distributed, and the pitch is 2.5mm, and the cooperation adhesive tape makes the fixture and the mesa keep the distance, lets the mesa air suction even effect be applied to the air suction hole, and the problem of uneven ink accumulation in the air suction hole in traditional printing is solved fundamentally.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board manufacturing, and in particular to a single-sided thermosetting ink printing fixture. Background Technology

[0002] Flexible printed circuit boards (FPCs) are widely used in electronic products such as smartphones, tablets, and wearable devices due to their advantages of being thin, light, and flexible. In these devices, the circuitry is densely packed, requiring effective protection measures to ensure performance and reliability. Screen printing is one of the commonly used methods for applying solder resist ink to FPCs; it is simple to operate, low in cost, and adaptable to circuit boards of different shapes and sizes. Although the precision of screen printing is relatively limited, it is sufficient for some single-sided FPCs. With continuous advancements in printing technology, screen printing precision is constantly improving, making the application of thermosetting solder resist technology on single-sided FPCs even more widespread. Because these products are thin, and the suction holes on the printing equipment table are typically 0.8mm to 1.0mm in diameter and spaced 10mm x 10mm apart, with the positioning pins fixed to the table at a height of 1.0mm to 2.0mm, uneven ink accumulation occurs at the suction holes during actual production. This is because the single-sided board consists of only one layer of copper and PI, the product thickness is between 35-100μm, the overall product size is <250mm x 300mm, the suction hole diameter is 1.0mm, the hole spacing is 10mm x 10mm, the suction holes are relatively large and widely distributed, and there are relatively few suction holes under the product. The suction force at the suction holes is relatively strong, causing indentations in the product at the holes, which are then filled with printing ink, resulting in uneven ink accumulation. Therefore, a single-sided thermosetting ink printing fixture is proposed to solve the above problems. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a single-sided thermosetting ink printing fixture, which aims to improve the problems of uneven ink accumulation at the air suction hole and holes in the wire mesh at the positioning pin.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: it includes a plate body, the top of the plate body is provided with multiple air intakes, the plate body is provided with positioning holes around its perimeter, a first adhesive tape is fixedly connected to the rear perimeter of the plate body, and five second adhesive tapes are fixedly connected between the first adhesive tapes.

[0005] As a further description of the above technical solution: the second tape includes a substrate layer, an adhesive layer, a release layer, and a primer layer, wherein the adhesive layer is fixedly connected to the inner wall of the substrate layer, and the release layer is fixedly connected to the inner wall of the adhesive layer.

[0006] As a further description of the above technical solution: multiple air intakes are located between four positioning holes.

[0007] As a further description of the above technical solution: four of the second tapes are located on top of multiple air intakes.

[0008] As a further description of the above technical solution: the plurality of air intakes are located between the first tapes.

[0009] As a further description of the above technical solution: the release layer is located between the adhesive layer and the primer layer.

[0010] As a further description of the above technical solution: the adhesive layer is located between the substrate layer and the release layer.

[0011] This utility model has the following beneficial effects: 1. In this utility model, the air intake is designed with a small diameter of 0.3mm and is evenly distributed with a spacing of 2mm. With the help of tape, the fixture is kept at a distance from the table surface, so that the air intake on the table surface is evenly applied to the air intake holes, which fundamentally solves the problem of uneven ink accumulation at the air intake holes in traditional printing.

[0012] 2. In this utility model, the positioning holes need to be designed on the waste material side of both sides of the product to facilitate the operation of the hanging nails. Attached Figure Description

[0013] Figure 1 This is a top view of a single-sided thermosetting ink printing fixture proposed in this utility model; Figure 2 This is a bottom view structural schematic diagram of a single-sided thermosetting ink printing fixture proposed in this utility model. Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0014] Figure 4 This is a schematic diagram of the first tape material layer of a single-sided thermosetting ink printing fixture proposed in this utility model. Legend: 1. Panel; 2. Positioning hole; 3. Air intake; 4. First tape; 5. Second tape; 6. Substrate layer; 7. Adhesive layer; 8. Release layer; 9. Primer layer. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-2 An embodiment of this utility model includes a plate 1, with multiple air intakes 3 on the top of the plate 1, positioning holes 2 around the plate 1, and a first adhesive tape 4 fixedly connected around the rear side of the plate 1. Five second adhesive tapes 5 are fixedly connected between the first adhesive tapes 4.

[0017] The plate 1 serves as the basic load-bearing structure of the fixture, providing an installation benchmark for each functional component. The multiple air intakes 3 on the top are the core channels for achieving vacuum adsorption. In conjunction with the negative pressure system of the screen printing machine, they can generate uniform suction force, firmly fixing the single panel to the surface of the fixture and preventing ink shifting caused by board displacement during printing. The positioning holes 2 around the perimeter are used to adapt to spring-type or pneumatic positioning pins. Through the precise cooperation between the positioning pins and the positioning holes 2 on the board, the board can be quickly aligned. On a copper-free FR-4 board with a thickness of 2.0±0.05mm and dimensions of 600*500±0.1mm, air intake holes are designed in an area with a 100mm inward recess on one side. The air intake holes have a diameter of 0.3mm and a spacing of 2.5*2.5mm.

[0018] Reference Figure 4 One embodiment of this utility model is provided: the second tape 5 includes a substrate layer 6, an adhesive layer 7, a release layer 8, and a primer layer 9. The adhesive layer 7 is fixedly connected to the inner wall of the substrate layer 6, and the release layer 8 is fixedly connected to the inner wall of the adhesive layer 7.

[0019] The substrate layer 6 is made of polyester or polyimide, providing stable structural support and temperature resistance, suitable for the high-temperature environment of thermosetting ink printing; the adhesive layer 7 uses acrylic pressure-sensitive adhesive to ensure a firm bond between the tape and the board 1, preventing it from falling off due to vibration during printing; the release layer 8 uses a silicone oil coating, which can protect the adhesiveness of the adhesive layer 7 during tape processing or storage. Reference Figure 4 One embodiment provided by this utility model: A 3mm wide, 0.5mm thick red adhesive tape is attached to the back of the pad to maintain a certain distance between the fixture and the screen printing machine table, ensuring that the airflow from the table is evenly distributed across the fixture's suction holes. Spring-loaded positioning pins are installed in the positioning holes 2 required by the fixture. These spring-loaded positioning pins are 0.5-1.0mm higher than the fixture platform. During printing, the squeegee presses down, causing the positioning pins to descend; after printing, they rise, thus mitigating the problem of positioning pins tearing the wire mesh. The small and evenly distributed apertures on the fixture platform also improve the problem of uneven ink accumulation at the suction holes, significantly contributing to improved product yield and extended wire mesh lifespan. Reference Figures 1-3 In one embodiment of this utility model, multiple air intakes 3 are located between four positioning holes 2.

[0020] Positioning holes 2 are distributed around the perimeter, and the positioning pins precisely limit the edge of the board to ensure the initial position accuracy of the board. The air intake 3 is concentrated in the middle area, which can form a uniform adsorption on the effective printing area of ​​the board, so that the board is tightly attached to the surface of the board body 1, eliminating the problem of uneven ink thickness caused by local warping.

[0021] Reference Figures 1-2 One embodiment of this utility model is provided: four second adhesive tapes 5 are located on top of multiple air intakes 3.

[0022] This layout allows the second tape 5 to be applied precisely to the corresponding area of ​​the air intake 3. Its elevation effect can guide the airflow to pass evenly upward from the bottom of the plate 1 through the air intake 3, avoiding uneven suction caused by local airflow obstruction in the air intake 3.

[0023] Reference Figures 1-2 One embodiment of this utility model is provided: multiple air intakes 3 are located between the first tapes 4.

[0024] The first tape 4 is distributed around the rear side of the plate 1 to form a ring-shaped raised frame, which encloses the air intake 3 in the middle area. This design allows the airflow to form a stable negative pressure field inside the frame, preventing the air from leaking from the edge of the plate 1 and ensuring that the suction force is concentrated on the air intake 3.

[0025] Reference Figure 4 In one embodiment of this utility model, the release layer 8 is located between the adhesive layer 7 and the primer layer 9.

[0026] This multi-layered composite structure makes the tape less prone to delamination and cracking during long-term use, making it suitable for the high-frequency operation requirements of thermosetting ink printing.

[0027] Reference Figure 3 In one embodiment of this utility model, the adhesive layer 7 is located between the substrate layer 6 and the release layer 8.

[0028] This sequence ensures that the tape can be quickly bonded and fixed during installation, maintain structural stability during use, and retain its performance during storage, solving the problems of weak adhesion and easy aging of traditional single-material tapes.

[0029] Working principle: The plate 1 serves as the basic structure, and the multiple air intakes 3 on its top are used to achieve uniform air distribution on the printing table during the printing process, avoiding uneven ink accumulation. The positioning holes 2 around the plate 1 are used to install spring-loaded positioning pins. The positioning pins descend during printing and rise after printing, which can improve the problem of positioning pins scratching the wire mesh.

[0030] The first adhesive tape 4 and the second adhesive tape 5 around the rear perimeter of the plate 1 serve to maintain the distance between the fixture and the screen printing machine table, ensuring that the suction from the table can be evenly applied to the suction port 3. The second adhesive tape 5 consists of a substrate layer 6, an adhesive layer 7, a release layer 8, and a primer layer 9. The structures of each layer work together to ensure the performance of the adhesive tape, thereby assisting the fixture in controlling the distance between itself and the table and optimizing the suction effect.

[0031] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-sided thermosetting ink printing fixture, comprising a plate (1), characterized in that: The top of the plate (1) is provided with multiple air inlets (3), the plate (1) is provided with positioning holes (2) around its perimeter, and the rear perimeter of the plate (1) is fixedly connected with a first tape (4), and five second tapes (5) are fixedly connected between the first tapes (4).

2. The single-sided thermosetting ink printing fixture according to claim 1, characterized in that: The second tape (5) includes a substrate layer (6), an adhesive layer (7), a release layer (8), and a primer layer (9). The adhesive layer (7) is fixedly connected to the inner wall of the substrate layer (6), and the release layer (8) is fixedly connected to the inner wall of the adhesive layer (7).

3. A single-sided thermosetting ink printing fixture according to claim 2, characterized in that: The release layer (8) is located between the adhesive layer (7) and the primer layer (9).

4. A single-sided thermosetting ink printing fixture according to claim 2, characterized in that: The adhesive layer (7) is located between the substrate layer (6) and the release layer (8).

5. A single-sided thermosetting ink printing fixture according to claim 1, characterized in that: Multiple air intakes (3) are located between four positioning holes (2).

6. A single-sided thermosetting ink printing fixture according to claim 1, characterized in that: Four of the second tapes (5) are located on top of multiple air inlets (3).

7. A single-sided thermosetting ink printing fixture according to claim 1, characterized in that: The plurality of air intakes (3) are located between the first tape (4).

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