Jig for horizontal tin immersion of circuit board and horizontal tin immersion production line of circuit board

Abstract

The utility model discloses a circuit board horizontal tin immersion wire jig and a circuit board horizontal tin immersion production line, the circuit board horizontal tin immersion wire jig comprises a frame, the end face of the frame is provided with an accommodating groove in a penetrating manner, and the accommodating groove is suitable for accommodating a circuit board; and the bearing block is connected to the side wall of the accommodating groove, and the bearing block is used for bearing the circuit board and driving the carbon oil surface of the circuit board to be placed in the accommodating groove. By means of the design of the containing groove in the frame and the bearing block connected to the frame, stability and accuracy of the circuit board in the tin immersion process are guaranteed, the carbon oil face of the circuit board is arranged in the containing groove, direct contact between carbon oil and the idler wheels is effectively avoided, the problems that the copper face cannot be tinned and the tin face becomes black due to carbon oil pollution are obviously reduced, and the circuit board is stable in tin immersion. And the product quality and the production efficiency are improved, the shutdown maintenance frequency caused by roller cleaning is reduced, the operation process is simplified, the applicability and the flexibility of the jig are enhanced, and the jig has remarkable practical value and market application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board manufacturing, in particular to a jig for horizontal tinning lines of circuit boards, and a circuit board horizontal tinning production line having the jig for horizontal tinning lines of circuit boards. Background Art

[0002] As electronic products evolve toward miniaturization, lightweighting, and higher performance, surface treatment technologies for PCBs (printed circuit boards), fundamental components of electronic devices, are gaining increasing attention. Carbon oil + immersion tin (Immersion Tin) surface treatment, due to its excellent conductivity and corrosion resistance, has become a key technology in PCB surface treatment. Horizontal Immersion Tin production lines are widely used in mass production of PCBs. Automated equipment automatically transports the boards from the inlet to the outlet. After treatment in various chemical and water wash stages, a dense tin layer is deposited on the copper surface to meet customer requirements for tin layer thickness.

[0003] Although the horizontal immersion tin production line has played an important role in improving production efficiency and product quality, there are still some problems in the actual production process, especially the carbon oil pollution problem. The specific manifestations are:

[0004] 1. Carbon oil contamination: Carbon oil is attacked by the tinning solution during the immersion tinning process, causing the surface to soften and precipitate. Due to the contact between the roller and the product, the oil will adhere to the roller surface. During the rotation of the roller, the roller contaminated with carbon oil contacts the board surface, and the carbon oil will adhere to the product surface, especially the copper and tin surfaces. This will cause quality problems such as contamination of the copper surface and the inability to tin or contamination of the tin surface and blackening.

[0005] 2. Roller contact: Horizontal tinning lines use two rows of rollers, upper and lower, to contact both sides of the product, ensuring smooth product transport (primarily the lower roller) and preventing excessive product deviation (the upper and lower rollers act simultaneously). While this design ensures smooth product transport, it also increases the risk of carbon oil contamination.

[0006] In this regard, problems such as the copper surface not being tinned or the tin surface being blackened due to carbon oil contamination seriously affect the final quality of the product and customer satisfaction, and increase the cost of rework and scrap. Utility Model Content

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a horizontal tinning fixture for circuit boards, which effectively reduces direct contact between carbon oil and rollers, avoiding the problems of copper surface failure and blackening of the tin surface caused by carbon oil contamination. This significantly improves product quality and production efficiency, reduces rework and scrap rates, and enhances the applicability and ease of operation of the fixture.

[0008] The utility model also provides a circuit board horizontal tinning production line having the above-mentioned fixture for circuit board horizontal tinning line.

[0009] The horizontal tinning fixture for circuit boards according to the present invention includes:

[0010] A frame, wherein an end surface of the frame is provided with a receiving groove, the receiving groove being suitable for receiving a circuit board;

[0011] The supporting block is connected to the side wall of the accommodating groove, and is used to support the circuit board and drive the carbon oil surface of the circuit board to be placed in the accommodating groove.

[0012] The fixture for horizontal tinning of circuit boards according to the present invention has at least the following beneficial effects:

[0013] 1. Effectively reduce carbon oil pollution: By placing the carbon oil surface of the circuit board in the receiving tank, the probability of direct contact between the carbon oil and the tinning line roller can be significantly reduced, thereby greatly reducing the problems of copper surface not being tinned or tin surface being blackened due to carbon oil contamination, thereby improving the quality and stability of the finished product.

[0014] 2. Improve production efficiency: Due to the reduction of carbon oil pollution, the cleaning workload on the production line is greatly reduced, which not only reduces production costs but also improves production efficiency. In addition, it reduces rework and scrap rates caused by pollution, further improving overall production efficiency.

[0015] 3. Optimize product surface quality: This technical solution effectively protects the carbon oil surface of the circuit board from the influence of the external environment through physical isolation, making the tinning process more uniform and stable, thereby improving the surface quality of the final product and enhancing the market competitiveness of the product.

[0016] 4. Enhanced equipment adaptability: The fixture is flexibly designed and can be adjusted according to circuit boards of different sizes and shapes. It is suitable for the production of various types of PCBs, which enhances the versatility and adaptability of the equipment and helps companies quickly respond to changes in market demand.

[0017] 5. Simplified operation process: The design of the support block enables the circuit board to be placed firmly in the fixture, and the circuit board can be accurately positioned and fixed without additional operation steps, which simplifies the operation process and reduces the difficulty of operation, and plays a positive role in improving the overall automation level of the production line.

[0018] According to the jig for horizontal tinning lines for circuit boards described in some embodiments of the present invention, the supporting block is provided with a supporting groove to support the circuit board.

[0019] According to the jig for horizontal tinning lines on circuit boards described in some embodiments of the present invention, there are multiple supporting blocks, and the multiple supporting blocks are respectively arranged on the opposite groove walls of the accommodating groove.

[0020] According to the jig for horizontal tinning of circuit boards described in some embodiments of the present invention, the depth of the supporting groove is greater than or equal to the thickness of the circuit board.

[0021] According to the jig for horizontal tinning lines on circuit boards described in some embodiments of the present invention, the supporting block is integrally connected to the frame.

[0022] According to the jig for horizontal tinning lines on circuit boards described in some embodiments of the present invention, the accommodating groove is a closed structure.

[0023] According to the jig for horizontal tinning lines on circuit boards described in some embodiments of the present invention, there are multiple accommodating grooves, and the multiple accommodating grooves are arranged at intervals.

[0024] According to the jig for horizontal tinning of circuit boards described in some embodiments of the present invention, the groove wall of the accommodating groove is provided with a pick-up and placement groove for picking up and placing the circuit board.

[0025] According to the jig for horizontal tinning lines on circuit boards described in some embodiments of the present invention, there are two pick-up and placement grooves, and the two pick-up and placement grooves are respectively arranged on opposite groove walls of the accommodating groove.

[0026] The horizontal tinning production line for circuit boards according to the utility model includes the horizontal tinning line fixture for circuit boards according to the utility model.

[0027] The horizontal tinning production line for circuit boards according to the utility model has at least the following beneficial effects: the design of the accommodating groove and the supporting block in the jig can place the carbon oil surface of the circuit board in the groove, reducing the chance of direct contact between the carbon oil and the tinning line roller, which not only significantly reduces the risk of carbon oil pollution, but also avoids problems such as the copper surface not being tinned or the tin surface being blackened due to carbon oil pollution, thereby greatly improving the final quality of the product; secondly, by reducing carbon oil pollution, the cleaning workload on the production line is greatly reduced, and the production cost is reduced. Compared with traditional production lines that require frequent cleaning to remove carbon oil pollution, which is not only time-consuming and labor-intensive, but also increases production costs, after using this jig, the cleaning frequency is significantly reduced, reducing maintenance time and labor costs, thereby improving production efficiency. At the same time, it reduces rework and scrap rates caused by pollution, further saves material and time costs, and improves overall production efficiency; in addition, the precise design of the supporting block and the supporting groove ensures the stability and positioning accuracy of the circuit board in the jig, making the tinning process more uniform and stable, which not only improves the appearance of the final product, but also improves the electrical performance and reliability of the product.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 This is a schematic structural diagram of a horizontal tinning fixture for circuit boards according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 An enlarged view of A is shown.

[0032] Description of Figure Numbers:

[0033] Frame 100; accommodating groove 101; taking and placing groove 102; supporting block 110; supporting groove 1101. DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0039] As electronic products evolve toward miniaturization, lightweighting, and higher performance, surface treatment technologies for PCBs (printed circuit boards), fundamental components of electronic devices, are gaining increasing attention. Carbon oil + immersion tin (Immersion Tin) surface treatment, due to its excellent conductivity and corrosion resistance, has become a key technology in PCB surface treatment. Horizontal Immersion Tin production lines are widely used in mass production of PCBs. Automated equipment automatically transports the boards from the inlet to the outlet. After treatment in various chemical and water wash stages, a dense tin layer is deposited on the copper surface to meet customer requirements for tin layer thickness.

[0040] Although the horizontal immersion tin production line has played an important role in improving production efficiency and product quality, there are still some problems in the actual production process, especially the carbon oil pollution problem. The specific manifestations are:

[0041] 1. Carbon oil contamination: Carbon oil is attacked by the tinning solution during the immersion tinning process, causing the surface to soften and precipitate. Due to the contact between the roller and the product, the oil will adhere to the roller surface. During the rotation of the roller, the roller contaminated with carbon oil contacts the board surface, and the carbon oil will adhere to the product surface, especially the copper and tin surfaces. This will cause quality problems such as contamination of the copper surface and the inability to tin or contamination of the tin surface and blackening.

[0042] 2. Roller contact: Horizontal tinning lines use two rows of rollers, upper and lower, to contact both sides of the product, ensuring smooth product transport (primarily the lower roller) and preventing excessive product deviation (the upper and lower rollers act simultaneously). While this design ensures smooth product transport, it also increases the risk of carbon oil contamination.

[0043] In this regard, problems such as the copper surface not being tinned or the tin surface being blackened due to carbon oil contamination seriously affect the final quality of the product and customer satisfaction, and increase the cost of rework and scrap.

[0044] For this reason, Figure 1 and Figure 2As shown, the jig for horizontal tinning of circuit boards proposed by the present invention includes a frame 100 and a supporting block 110. The end surface of the frame 100 is provided with a receiving groove 101, which is suitable for receiving the circuit board. Furthermore, the supporting block 110 is connected to the side wall of the receiving groove 101. The supporting block 110 is used to support the circuit board and drive the carbon oil surface of the circuit board into the receiving groove 101. For example, if the circuit board is a single-sided carbon oil tinning board, the carbon oil surface is placed downward to avoid or reduce contact between the carbon oil on the board surface and the equipment roller, preventing the carbon oil from contaminating the roller and causing it to stick to the board surface. It should be noted that the design of the accommodating groove 101 on the frame 100 and the supporting block 110 connected to the frame 100 ensures the stability and accuracy of the circuit board during the tinning process, wherein the carbon oil surface of the circuit board is placed in the accommodating groove 101, which effectively avoids direct contact between the carbon oil and the roller, and significantly reduces problems such as the copper surface not being tinned and the tin surface being blackened due to carbon oil pollution. It not only improves the quality and production efficiency of the product, but also reduces the number of maintenance shutdowns due to roller cleaning, simplifies the operating process, enhances the applicability and flexibility of the jig, and is suitable for various types of circuit boards, with significant practical value and market application prospects.

[0045] In some embodiments, the circuit board is directly placed on the end surface of the supporting block 110. In some embodiments of the present invention, such as Figure 1 and Figure 2As shown, support block 110 is provided with a support groove 1101 to support the circuit board, enabling more precise positioning and securing of the circuit board, ensuring a stable position within the jig. This design not only helps prevent the circuit board from shifting during transport, but also reduces processing errors caused by unstable position, improving the consistency and reliability of the tinning process. Furthermore, the design of support groove 1101 also better protects the edges of the circuit board from mechanical damage during transport, further improving product yield. Specifically, the provision of support groove 1101 allows the circuit board to be more securely placed within the jig, ensuring its accurate position throughout each processing stage. This not only helps reduce uneven tinning caused by positional deviation, but also improves the automation level of the production line, reducing the need for manual intervention, thereby improving production efficiency. Furthermore, the design of support groove 1101 effectively prevents minor displacement of the circuit board caused by vibration or impact during transport, ensuring the stability and consistency of the tinning process. Furthermore, the design of support groove 1101 helps protect the edges of the circuit board from wear and scratches during transport. This not only improves the surface quality of the circuit board, but also extends the service life of the circuit board. In actual production, damage to the edge of the circuit board often leads to an increase in defective products in subsequent processes, and the design of the support groove 1101 can effectively avoid this situation, thereby reducing production costs. Furthermore, there are multiple support blocks 110, and the multiple support blocks 110 are respectively arranged on the relative groove walls of the accommodating groove 101, which can support the circuit board more evenly and ensure that the circuit board is well supported in the entire length direction. It not only effectively prevents the circuit board from bending or deforming during transportation, but also is particularly important when handling thinner or larger circuit boards. In addition, multi-point support also helps to disperse the weight of the circuit board, reduces deformation and processing errors caused by local stress concentration, and improves the adaptability and versatility of the jig, significantly improving the quality of the product.

[0046] In some embodiments of the present invention, the depth of the support groove 1101 is greater than or equal to the thickness of the circuit board, ensuring that the circuit board is fully embedded in the support groove 1101, thereby better fixing the position of the circuit board. This not only helps prevent the circuit board from moving during transportation, but also effectively protects the edges of the circuit board from wear and scratches during transportation. In addition, a support groove 1101 of sufficient depth can also reduce the contact area between the carbon oil surface and the external environment. For example, when the depth of the support groove 1101 is greater than the thickness of the circuit board, both end faces of the circuit board are within the receiving groove 101, so that the upper and lower rollers of the circuit board do not contact each other during the tinning process. It should be noted that during the tinning process, if the carbon oil surface is exposed to the outside, it is easily attacked by the solution and precipitated, thereby contaminating the rollers and other surfaces of the circuit board. By placing the carbon oil surface in a support groove 1101 of sufficient depth, the carbon oil surface can be effectively isolated, reducing its contact with external rollers, and further reducing the risk of carbon oil contamination.

[0047] Optionally, the support block 110 is integrally connected to the frame 100, significantly improving the structural strength and stability of the entire jig. As will be readily understood, this integrated design reduces the number of connections, avoids failures caused by loose or damaged connectors, and makes the overall jig structure more robust and reliable, extending its service life. In actual production, circuit board jigs must withstand a certain amount of weight and mechanical stress, especially during long periods of continuous operation. In traditional designs, the support block is typically secured to the frame using bolts or other connectors (not shown). These connections are susceptible to loosening due to vibration, wear, or fatigue, resulting in reduced jig stability and reliability. The integrated design eliminates these potential weaknesses, ensuring the jig's stability and durability over long periods of use. Alternatively, the integrated design can be achieved through a single-step molding process or welding, reducing assembly steps, improving manufacturing precision and efficiency, and reducing production costs while shortening the manufacturing cycle, enabling the jig to be put into production more quickly.

[0048] In some embodiments, the accommodating groove is an open structure, that is, it has an opening for the circuit board to be inserted laterally (not shown in the figure). Figure 1As shown, the receiving groove 101 is a closed structure, which further improves the fixing firmness of the circuit board. In some embodiments, the length of the receiving groove 101 corresponds to the length of the circuit board; in some embodiments, the width of the receiving groove 101 corresponds to the width of the circuit board; and thus, at least a single circuit board can be placed therein. In some embodiments, the length and width of the receiving groove 101 correspond to the length and width of the circuit board, respectively, to accommodate the placement of a single circuit board. In some applications, the circuit board is placed into the closed receiving groove 101 with the end face downward of the frame 100, so that the circuit board will not fall laterally, and the carbon oil surface of the circuit board is completely in a controlled environment, which can be stably transported during the tinning process, preventing it from shifting or vibrating during transportation, thereby reducing processing errors caused by unstable position. This stable fixing method not only improves the consistency and reliability of the tinning process, but also improves the product yield. Optionally, there are multiple accommodating slots 101, and the multiple accommodating slots 101 are arranged at intervals, which can process multiple circuit boards at the same time, significantly improving the production capacity of the production line. As a result, the frame 100 is not only suitable for processing a single circuit board, but also suitable for batch production, thereby improving production efficiency. The spaced arrangement of the multiple accommodating slots 101 ensures that there is enough space between each circuit board, avoids mutual influence, ensures that each circuit board can be processed evenly, and improves the overall processing quality. In addition, this design also enhances the versatility and adaptability of the jig, can quickly respond to the needs of circuit boards of different sizes and shapes, and improves the flexibility and market competitiveness of the production line. For example, there are two accommodating slots 101, and the two accommodating slots 101 are arranged at intervals along the length direction of the frame 100.

[0049] Further, refer to Figure 1 In some embodiments of the present invention, the wall of the accommodating groove 101 is provided with a pick-up and placement groove 102 for picking up and placing the circuit board, which simplifies the pick-up and placement operation of the circuit board and improves the convenience and efficiency of the operation. It is easy to understand that the design of the pick-up and placement groove 102 allows the operator to easily and quickly put the circuit board in and out of the jig, reducing the operation time and difficulty. Optionally, there are two pick-up and placement grooves 102, and the two pick-up and placement grooves 102 are respectively arranged on the opposite groove walls of the accommodating groove 101, providing more operating space for the operator, making it convenient for the operator to pick up and place the circuit board from both sides at the same time, which not only improves the flexibility and convenience of the operation, but also reduces the operation time and further improves production efficiency. It is easy to understand that the design of the two pick-up and placement grooves 102 ensures the balance and stability of the circuit board during the pick-up and placement process, avoids tilting or sliding caused by unilateral operation, improves the safety and reliability of the operation, and further improves the yield rate and overall quality of the product.

[0050] The horizontal immersion tinning production line for circuit boards according to the embodiment of the present utility model includes a horizontal immersion tinning line fixture for circuit boards according to the embodiment of the present utility model.

[0051] According to the circuit board horizontal tinning production line of the embodiment of the present invention, by adopting the circuit board horizontal tinning line fixture of the embodiment of the present invention, the accommodating groove 101 and the supporting block 110 in the fixture are designed to place the carbon oil surface of the circuit board in the groove, reducing the direct contact opportunity between the carbon oil and the tinning line solution and the roller, which not only significantly reduces the risk of carbon oil contamination, but also avoids the problems of copper surface not being tinned or tin surface being blackened due to carbon oil contamination, thereby greatly improving the final quality of the product; secondly, by reducing carbon oil contamination, the cleaning workload on the production line is greatly reduced, and the production cost is reduced. Compared with traditional production The wire needs to be cleaned frequently to remove carbon oil pollution, which is not only time-consuming and labor-intensive, but also increases production costs. After using this jig, the cleaning frequency is significantly reduced, reducing maintenance time and labor costs, thereby improving production efficiency. At the same time, it reduces rework and scrap rates caused by pollution, further saves material and time costs, and improves overall production efficiency. In addition, the precise design of the support block 110 and the support groove 1101 ensures the stability and positioning accuracy of the circuit board in the jig, making the tinning process more uniform and stable, which not only improves the appearance of the final product, but also improves the electrical performance and reliability of the product.

[0052] Other structures and operations of the horizontal immersion tin production line for circuit boards according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fixture for horizontal tinning lines on circuit boards, characterized by: include: A frame, wherein an end surface of the frame is provided with a receiving groove, the receiving groove being suitable for receiving a circuit board; The supporting block is connected to the side wall of the accommodating groove, and is used to support the circuit board and drive the carbon oil surface of the circuit board to be placed in the accommodating groove.

2. The fixture for horizontal tinning of circuit boards according to claim 1, characterized in that: The supporting block is provided with a supporting groove to support the circuit board.

3. The fixture for horizontal tinning of circuit boards according to claim 2, characterized in that: There are a plurality of supporting blocks, and the plurality of supporting blocks are respectively arranged on opposite groove walls of the accommodating groove.

4. The fixture for horizontal tinning of circuit boards according to claim 2 or 3, characterized in that: The depth of the supporting groove is greater than or equal to the thickness of the circuit board.

5. The fixture for horizontal tinning of circuit boards according to claim 1, characterized in that: The supporting block is integrally connected to the frame.

6. The fixture for horizontal tinning of circuit boards according to claim 1, characterized in that: The accommodating groove is a closed structure.

7. The fixture for horizontal tinning of circuit boards according to claim 1 or 6, characterized in that: There are a plurality of accommodating grooves, and the plurality of accommodating grooves are arranged at intervals.

8. The fixture for horizontal tinning of circuit boards according to claim 1, characterized in that: The groove wall of the accommodating groove is provided with a taking-and-placing groove for taking and placing the circuit board.

9. The fixture for horizontal tinning of circuit boards according to claim 8, characterized in that: There are two taking and placing grooves, and the two taking and placing grooves are respectively arranged on opposite groove walls of the accommodating groove.

10. Horizontal tinning production line for circuit boards, characterized by: It comprises a horizontal tinning line fixture for a circuit board as described in any one of claims 1 to 9.

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