Circuit board etching and tin stripping device

Abstract

The invention relates to the technical field of circuit boards, in particular to a circuit board etching and tin stripping device which comprises a treatment pond, pier heads, a cross beam, vertical beams, sliding rails and a cross frame, the two vertical beams are arranged on the upper surfaces of the two side ends of the treatment pond respectively, the pier heads are installed at the top ends of the vertical beams, the cross beam is located between the two pier heads, and the sliding rails are arranged on the side surfaces of the vertical beams. The transverse frame is installed at the lower end of the beam. The area, not covered with copper foil, of the circuit board is wrapped and protected through the protective clamp, the copper foil area is completely exposed in the reaction liquid, and the transverse frame controls the soaking depth and time of the circuit board in the reaction liquid through sliding control of the sliding rail; the treatment tank is divided into an upper area and a lower area through the separation filter part, precipitated reactants are intercepted in the lower area of the separation filter part, reaction liquid is supplemented again in the upper area for mixing, and the stability of the quality and the concentration of the reaction liquid is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of circuit boards, and in particular to a circuit board etching and tin stripping device. Background Art

[0002] Circuit boards are an indispensable component in electronic devices. They are made of conductive materials (mainly copper foil) and insulating materials (such as epoxy resin and other substrates). Through precise wiring design, they connect various electronic components together to achieve the signal transmission and control functions of the circuit. They are key basic components in electronic products that carry and support electronic components and realize circuit connections and functions.

[0003] The etching and detinning process of circuit boards is a delicate and critical manufacturing step that is directly related to the quality and performance of the circuit board. This process begins in the pretreatment stage of the circuit board, in which the surface of the circuit board will first undergo a series of treatments such as cleaning and oxidation to ensure good adhesion between the copper foil and the subsequent protective layer (usually a tin layer). Next, a protective pattern is formed on the copper foil of the circuit board through photolithography or masking technology, which defines the final circuit layout of the circuit board. The unprotected part, that is, the part that needs to be etched away, will be exposed. Then, it enters the etching stage. In this stage, the circuit board is immersed in a special etching solution that can react chemically with the copper foil and gradually dissolve it. As the etching proceeds, the unprotected copper foil part will be gradually etched away, while the protected part will be retained to form the circuit board's circuit. After the etching is completed, a protective tin layer remains on the circuit board. In order to remove this tin layer, the circuit board will enter the detinning stage. The detinning process usually uses a specific chemical solution that can react with tin and dissolve it from the circuit board. During the detinning process, the concentration, temperature and time of the solution need to be strictly controlled to ensure that the tin layer is completely removed without causing damage to the circuits on the circuit board.

[0004] For single-sided circuit boards with a copper foil thickness of more than 70 microns, an immersion treatment is used. The etching treatment pool is adjacent to the tin stripping treatment pool. During the etching process, in order to ensure the complete removal of the unnecessary copper foil, the reaction time must be extended. However, long-term immersion will aggravate the side corrosion phenomenon, that is, the etching solution not only corrodes the copper foil vertically downward, but also expands to the sides and holes, causing the circuit board lines to become rough. As the copper foil continues to dissolve, the copper ion concentration in the etching solution will continue to rise, and the etching solution needs to be replenished in time. After the rehydration, tiny bubbles are generated by the high-frequency vibration of ultrasound to efficiently mix the etching solution. As the etching reaction continues, copper precipitates will be produced in the solution. The long-term reaction causes the precipitate particles to gradually increase. During the ultrasonic stirring process, these enlarged precipitates will be surged and redispersed in the etching solution. If large particles of precipitates adhere to the circuit board, an uneven etching surface will be formed. After entering the tin stripping process, the tin stripping effect will also be affected due to problems such as precipitate attachment in the early etching process.

[0005] To this end, a circuit board etching and tin stripping device is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a circuit board etching and tin stripping device. In order to solve the problem that long-term immersion will aggravate the side corrosion phenomenon and large particles of precipitates adhere to the circuit board, the area of ​​the circuit board not covered by the copper foil is protected by clamping the protective clip, the non-etching area of ​​the circuit board is protected, and the partition filter completes the sealing, and the precipitated reactant particles are separated at the lower end of the partition filter.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A circuit board etching and tin stripping device comprises a processing pool, a pier head, a cross beam, a vertical beam, a slide rail and a cross frame, wherein two vertical beams are respectively arranged on the upper surfaces of the two side ends of the processing pool, the pier head is installed at the top end of the vertical beam, the cross beam is located between the two pier heads, the slide rail is arranged on the side surface of the vertical beam, and the cross frame is installed at the lower end of the cross beam. It also comprises a protective clamp, a guide member and a partition filter member, the guide member is installed at both ends of the cross frame, three protective clamps are arranged at the lower end of the cross frame, and the three protective clamps are located between the two guide members, and the partition filter member is installed at the inner bottom end of the processing pool, the protective clamp is used for loading and unloading the circuit board to be processed, and the four side edge surfaces, the back side and the inner groove surface of the hole of the circuit board are covered by the clamping of the protective clamp, and the closing of the partition filter member is controlled, the closed partition filter member divides the chamber of the processing pool into upper and lower areas, the opening of the partition filter member is controlled by unloading the circuit board, and the opened partition filter member connects the upper and lower areas of the processing pool.

[0009] From the above scheme, it can be seen that: the protection of the non-etching area of ​​the circuit board by the protective clips, the effective separation and precipitation of the reactant particles by the separation filter, and the precise immersion operation achieved by the cooperation of the slide rail and the cross frame not only improve the accuracy and efficiency of etching and tin stripping, but also enhance the environmental protection and resource utilization of the processing process, and significantly improve the overall quality and cost-effectiveness of circuit board processing.

[0010] Preferably, the separation filter element includes a contour ring frame, a triangular fixed strip, a movable triangular strip, a triangular area, a connecting rod and a U-shaped tube. The contour ring frame is installed on the side wall of the bottom end of the treatment pool, the triangular fixed strips are evenly arranged on the inner side of the contour ring frame, the movable triangular strip is centered between the triangular fixed strips, the triangular area is arranged between two triangular fixed strips, the connecting rod is installed at the middle end of the upper surface of the movable triangular strip, the U-shaped tube is arranged at the upper end of the movable triangular strip, and the top end of the connecting rod is connected to the lower surface of the U-shaped tube.

[0011] It can be seen from the above scheme that: through the ingenious combination of the contour ring frame, the triangular fixed strips and the movable triangular strips, not only the effective filtration and separation of the reactant particles are achieved, but also the flexibility and adjustability of the filter element are enhanced through the innovative connection of the connecting rod and the U-shaped tube, so that the separation filter element can more efficiently adapt to the requirements of different particle sizes and precipitation speeds, thereby improving the reaction liquid purification efficiency and resource utilization in the circuit board etching and detinning process.

[0012] Preferably, both ends of the cross frame are provided with matching sleeve grooves, which match the guide members, and three L-shaped connecting rods are installed on the lower surface of the cross frame, and one end of the L-shaped connecting rod is connected to the side surface of the protective clamp.

[0013] It can be seen from the above scheme that: through the precise matching of the matching sleeve groove and the guide member, the stable sliding and precise positioning of the cross frame on the slide rail are ensured. At the same time, the innovative application of the L-shaped connecting rod not only enhances the connection strength between the cross frame and the protective clamp, but also enables the protective clamp to clamp the circuit board more flexibly and more firmly, thereby improving the operation convenience and processing accuracy during the etching and de-tinning process of the circuit board.

[0014] Preferably, the protective clip includes a front plate, a back plate, an extrusion plate, a rear plate, a positioning area and a bottom strip, the side surface of the rear plate is connected to one end of the L-shaped connecting rod, the front plate is installed on one side of the rear plate, the bottom strip is arranged at the bottom ends of the front plate and the rear plate, the front plate, the rear plate and the bottom strip are an integrated structure, the back plate is arranged between the front plate and the rear plate, the extrusion plate is installed between the back plate and the rear plate, the bottom end of the extrusion plate is connected to the surface limit of the bottom strip, and the positioning area is arranged between the front plate and the back plate.

[0015] It can be seen from the above scheme that: through the integrated structure of the front plate, rear plate, back plate, extruded plate and bottom strip, not only the overall stability and durability of the protective clip are enhanced, but also through the limited connection between the extruded plate and the bottom strip, as well as the precise setting of the positioning area, the circuit board is tightly clamped and effectively protected in the area not covered by the copper foil, thereby improving the protection effect and processing quality of the circuit board during the etching and tin stripping process.

[0016] Preferably, a connecting rod is installed at the top end of the three extrusion plates, and the side surfaces of both ends of the connecting rod are provided with an extrusion rod, and one end of the extrusion rod is connected to the guide member.

[0017] It can be seen from the above scheme that: by connecting the top ends of the three extrusion plates through the connecting rod and utilizing the docking of the extrusion rod and the guide piece, not only the flexible adjustment of the clamping force of the protective clip is achieved, but also the synchronization and stability of the cross frame and the protective clip during movement are enhanced, thereby further improving the processing accuracy and safety of the circuit board during the etching and de-tinning process.

[0018] Preferably, a matching groove is provided on the surface of the front plate, the matching groove matches the size of the circuit board workpiece, blocks are installed at the four corners of the matching groove, a bottom side groove is provided on the side surface of the bottom end of the front plate, and matching corner grooves are provided at the two corners of the lower end of the matching groove.

[0019] It can be seen from the above scheme that: through the precise matching of the matching slot and the circuit board workpiece size, as well as the setting of the stop block and the matching bend slot, not only the stable placement and precise positioning of the circuit board in the protective clamp are ensured, but also through the opening of the bottom side slot, it provides convenience for the rapid installation and disassembly of the circuit board, thereby improving the operating efficiency and processing accuracy of the circuit board etching and detinning process.

[0020] Preferably, both side ends of the back panel are provided with contour side strips, the spacing between the two contour side strips matches the outer dimensions of the front panel, the bottom end of the contour side strip is provided with a turn strip, the height of the inner bottom surface of the turn strip is flush with the inner bottom surface of the matching groove, and the inner corner of the turn strip is on the same horizontal line as the inner corner of the bottom end of the matching groove, and the four corner ends of the back panel are provided with sliding hole grooves, which match the hole positions of the circuit board workpiece.

[0021] It can be seen from the above scheme that: through the precise matching of the contour side strips with the outer dimensions of the front plate, as well as the high consistency of the corner strips with the inner bottom surface of the matching groove and the horizontal alignment of the inner corners, not only the clamping stability of the protective clip on the circuit board is enhanced, but also through the matching of the sliding hole groove with the hole position of the circuit board workpiece, the precise positioning and auxiliary support of the circuit board during the etching and de-tinning process are achieved, thereby further improving the quality and efficiency of circuit board processing.

[0022] Preferably, an L-shaped strip is installed at the bottom end of the extrusion plate, the L-shaped strip is located at the lower end of the back plate, and the side end of the L-shaped strip matches the bottom side groove, and a connecting spring 1 is evenly installed at the side edge of the extrusion plate, one end of the connecting spring 1 is connected to the side surface of the back plate, and matching columns are provided at the four corners of the extrusion plate, and the matching columns match the sliding hole grooves.

[0023] It can be seen from the above scheme that: through the matching of the L-shaped strip and the bottom side groove, as well as the flexible adjustment of the distance between the pair of extrusion plates and the back plate of the connecting spring, not only the stable clamping of the circuit board in the protective clamp is ensured, but also through the precise docking of the matching post and the sliding hole groove, the positioning accuracy and stability of the circuit board in the etching and de-tinning process are further enhanced, thereby improving the overall quality and efficiency of circuit board processing.

[0024] Preferably, a hydraulic telescopic rod is installed at the bottom end of the inner side of the rear plate, and one end of the hydraulic telescopic rod is connected to the inner end surface of the L-shaped strip.

[0025] It can be seen from the above scheme that: through the connection between the hydraulic telescopic rod at the bottom end of the inner side of the rear plate and the inner end face of the L-shaped strip, precise control and dynamic adjustment of the clamping force of the extrusion plate are achieved. This design not only improves the flexibility and adaptability of the protective clamp to the circuit board, but also ensures that the circuit board always maintains a stable clamping state during the etching and detinning process, thereby further improving the quality and precision of circuit board processing.

[0026] Preferably, the guide member includes a fixed sleeve fixedly installed on the inner wall of the treatment pool and a sliding rod arranged on the inner side of the fixed sleeve, the fixed sleeve matches the matching sleeve groove, the bottom surface of the sliding rod is connected to the top end of the U-shaped tube, one side surface of the sliding rod is provided with a groove, and the bottom surface of the groove is provided with a lower inclined surface, a side vertical bar is installed on one side of the fixed sleeve, one end of the extrusion rod is in contact with the side surface of the side vertical bar, and connecting springs 2 are installed at both ends of the side vertical surface of the side vertical bar, one end of the connecting spring 2 is connected to the side surface of the fixed sleeve, and an extrusion column is provided between the two connecting springs 2, and the extrusion column is connected to the lower inclined surface limit.

[0027] It can be seen from the above scheme that: through the cooperation of the fixed sleeve and the sliding rod, as well as the setting of the slot, the lower inclined surface, the side upright bar, the connecting spring 2 and the extrusion column, not only the stable guidance and precise positioning of the cross frame on the slide rail are achieved, but also through the fit of the extrusion rod and the side upright bar and the limiting connection of the extrusion column to the lower inclined surface, the dynamic adjustment and buffering of the movement process of the cross frame are achieved, thereby improving the operational stability and processing accuracy during the etching and detinning process of the circuit board.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. A circuit board etching and tin stripping device, through the cooperation between the movable triangular strip plate and the triangular fixed strip plate, not only facilitates the natural sliding of sediments to avoid jamming, but can also completely block the filter tank when needed, and divide the treatment pool into two upper and lower areas to prevent large particles of sediment from adhering to the circuit board. The precipitated reactant particles are effectively separated at the lower end of the separation filter element, while the upper area of ​​the separation filter element can be refilled with reaction liquid for mixing, ensuring the quality and concentration of the reaction liquid to be stable, thereby improving the treatment efficiency and effect.

[0030] 2. A circuit board etching and detinning device, which accurately loads the circuit board workpiece into it through a protective clamp, ensuring that the area of ​​the circuit board not covered by the copper foil is fully protected. At the same time, the copper foil area is completely exposed to the reaction liquid. The horizontal frame controls the sliding of the slide rail to control the immersion depth and time of the circuit board in the reaction liquid, thereby achieving efficient and uniform etching and detinning treatment, effectively removing the film layer, avoiding side corrosion problems, and improving the workpiece processing quality.

[0031] 3. A circuit board etching and tin stripping device, the circuit board workpiece can be accurately and conveniently loaded into the protective clamp, while ensuring the stability and safety of the workpiece during the immersion process, through the combination of the extrusion plate, back plate, front plate and bottom strip plate, as well as the matching paste slot, stop block and matching bend slot and other components, the calibration and positioning effect is further enhanced, in addition, the matching sleeve slot and extrusion rod of the guide member and the cross frame make the entire lifting and clamping process more flexible and controllable, simplify the operation process, and improve work efficiency, at the same time, the connecting spring 2 and the extrusion column design in the guide member ensure the flexible opening and closing of the partition filter, so that the clamping of the workpiece and the closing of the partition filter are carried out synchronously, further improving the practicality and convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the separation filter element of the present invention;

[0034] Figure 3 It is a schematic structural diagram of the protective clamp of the present invention in a sinking state;

[0035] Figure 4 It is a schematic diagram of the overall structure of the protective clip of the present invention;

[0036] Figure 5 It is a schematic diagram of the disassembly structure of the protective clip of the present invention;

[0037] Figure 6 It is a schematic diagram of the structure of the protective clip of the present invention in a clamping state;

[0038] Figure 7It is a schematic diagram of the guide structure of the present invention;

[0039] Figure 8 It is a schematic diagram of the planar structure of the protective clamp of the present invention in a non-immersed state;

[0040] Fig. 9 It is a schematic diagram of the planar structure of the protective clip of the present invention in an immersed state.

[0041] In the figure: 1, treatment tank; 2, pier head; 3, crossbeam; 4, vertical beam; 5, slide rail; 6, cross frame; 61, matching sleeve groove; 62, L-shaped connecting rod; 63, connecting bar; 64, extrusion rod; 7, protective clamp; 71, front plate; 711, matching sticking groove; 712, stop block; 713, matching turning groove; 714, bottom side groove; 715, hydraulic telescopic rod; 72, back plate; 721, contour side strip; 722, slide hole groove; 723, turning bar; 73, extrusion plate; 731. L-shaped strip; 732. Connecting spring 1; 733. Matching post; 74. Back plate; 75. Positioning area; 76. Bottom strip; 8. Guide; 81. Fixed sleeve; 82. Sliding rod; 83. Slot; 84. Lower slope; 85. Side strip; 86. Extrusion column; 87. Connecting spring 2; 9. Partition filter element; 91. Contour ring frame; 92. Triangular fixed strip; 93. Movable triangular strip; 94. Triangular area; 95. Connecting rod; 96. U-shaped tube. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 9 The present invention provides a circuit board etching and tin stripping device, and the technical solution is as follows:

[0044] A circuit board etching and tin stripping device comprises a processing pool 1, a pier head 2, a cross beam 3, a vertical beam 4, a slide rail 5 and a cross frame 6, wherein the two vertical beams 4 are respectively arranged on the upper surfaces of the two side ends of the processing pool 1, the pier head 2 is installed at the top of the vertical beam 4, the cross beam 3 is located between the two pier heads 2, the slide rail 5 is arranged on the side surface of the vertical beam 4, and the cross frame 6 is installed at the lower end of the cross beam 3. It also comprises a protective clamp 7, a guide member 8 and a partition filter 9, the guide member 8 is installed at both ends of the cross frame 6, three protective clamps 7 are arranged at the lower end of the cross frame 6, and the three protective clamps 7 are located between the two guide members 8, and the partition filter 9 is installed at the inner bottom end of the processing pool 1, the protective clamp 7 is used for loading and unloading the circuit board to be processed, and the four side edge surfaces, the back surface and the inner groove surface of the hole of the circuit board are covered by the clamping of the protective clamp 7, and the closing of the partition filter 9 is controlled, and the closed partition filter 9 divides the chamber of the processing pool 1 into an upper and lower area, and the opening of the partition filter 9 is controlled by unloading the circuit board, and the opened partition filter 9 connects the upper and lower areas of the processing pool 1.

[0045] In this embodiment, the protective clips 7 and other components are made of corrosion-resistant materials. The two ends of the cross frame 6 slide along the slide rail 5 to control the lifting and lowering of the three protective clips 7. Through the immersion treatment, the surface of the circuit board workpiece can be fully and evenly reacted to effectively remove the film layer.

[0046] As an embodiment of the present invention, refer to Figure 2 , Figure 8 and Fig. 9 The separation filter element 9 includes a contour ring frame 91, a triangular fixed strip 92, a movable triangular strip 93, a triangular area 94, a connecting rod 95 and a U-shaped tube 96. The contour ring frame 91 is installed on the side wall of the bottom end of the treatment pool 1, the triangular fixed strips 92 are evenly arranged on the inner side of the contour ring frame 91, the movable triangular strip 93 is centered between the triangular fixed strips 92, the triangular area 94 is arranged between the two triangular fixed strips 92, the connecting rod 95 is installed at the middle end of the upper surface of the movable triangular strip 93, the U-shaped tube 96 is arranged at the upper end of the movable triangular strip 93, and the top end of the connecting rod 95 is connected to the lower surface of the U-shaped tube 96.

[0047] In this embodiment, the tips of the triangular fixed strips 92 on the left and right sides that are attached to the inner walls of the contour ring frame 91 fit into the wall surface to form a smooth slope structure, and the sediment can naturally slide to both sides due to the tip of the middle triangular fixed strip 92. The movable triangular strips 93 are set to have sharp corners at the top and bottom and rounded corners at the left and right, so that the sediment can naturally slide down from the filter trough formed by the two, which is convenient for guiding the sediment and avoiding blockage. A water suction port is set at the side end of the bottom of the treatment tank 1, which is convenient for processing the precipitated reactants while renewing the liquid.

[0048] As an embodiment of the present invention, refer to Figure 2 and Figure 3 Matching sleeve grooves 61 are provided at both ends of the cross frame 6, and the matching sleeve grooves 61 match the guide member 8. Three L-shaped connecting rods 62 are installed on the lower surface of the cross frame 6, and one end of the L-shaped connecting rod 62 is connected to the side surface of the protective clamp 7.

[0049] In this embodiment, the matching sleeve groove 61 is provided with sufficient space, and the cross frame 6 can smoothly pass through the entire guide member 8 during the lifting process.

[0050] As an embodiment of the present invention, refer to Figure 4 The protective clip 7 includes a front plate 71, a back plate 72, an extrusion plate 73, a rear plate 74, a positioning area 75 and a bottom strip 76. The side surface of the rear plate 74 is connected to one end of the L-shaped connecting rod 62. The front plate 71 is installed on one side of the rear plate 74. The bottom strip 76 is arranged at the bottom ends of the front plate 71 and the rear plate 74. The front plate 71, the rear plate 74 and the bottom strip 76 are an integrated structure. The back plate 72 is arranged between the front plate 71 and the rear plate 74. The extrusion plate 73 is installed between the back plate 72 and the rear plate 74. The bottom end of the extrusion plate 73 is connected to the surface of the bottom strip 76 in a limited position. The positioning area 75 is arranged between the front plate 71 and the back plate 72.

[0051] In this embodiment, the bottom end of the extrusion plate 73 is limitedly connected to the bottom strip 76. As the extrusion plate 73 translates, the back plate 72 is synchronously displaced. When the front plate 71 and the back plate 72 are engaged, the extrusion plate 73 gradually approaches the back plate 72.

[0052] As an embodiment of the present invention, refer to Figure 3 A connecting rod 63 is installed at the top end of the three extrusion plates 73, and an extrusion rod 64 is provided on the side surfaces of both ends of the connecting rod 63, and one end of the extrusion rod 64 is connected to the guide member 8.

[0053] In this embodiment, the position of the extrusion plate 73 controls the positions of the connecting bar 63 and the extrusion rod 64 , and the extrusion rod 64 exerts an extrusion effect on the guide member 8 through the displacement of the extrusion plate 73 .

[0054] As an embodiment of the present invention, refer to Figure 4 and Figure 5 A matching groove 711 is provided on the surface of the front plate 71, and the matching groove 711 matches the size of the circuit board workpiece. A stop block 712 is installed at the four corners of the matching groove 711. A bottom side groove 714 is provided on the side surface of the bottom end of the front plate 71, and matching corner grooves 713 are provided at the two corners of the lower end of the matching groove 711.

[0055] In this embodiment, the front plate 71 fits and protects the edge of the circuit board workpiece to prevent side corrosion at the edge, and the matching groove 713 corresponds to the inner bottom surface of the front plate 71.

[0056] As an embodiment of the present invention, refer to Figure 4 and Figure 5 , both side ends of the back plate 72 are provided with contour side strips 721, the spacing between the two contour side strips 721 matches the outer size of the front plate 71, the bottom end of the contour side strip 721 is provided with a bend strip 723, the height of the inner bottom surface of the bend strip 723 is flush with the inner bottom surface of the matching groove 711, and the inner corner of the bend strip 723 is on the same horizontal line as the inner corner of the bottom end of the matching groove 711, and the four corner ends of the back plate 72 are provided with sliding hole grooves 722, which match the hole positions of the circuit board workpiece.

[0057] In this embodiment, when the circuit board workpiece is loaded into the positioning area 75, the two bend bars 723 support the bottom end of the circuit board workpiece, and when the bend bar 723 is engaged with the matching bend groove 713, the inner bottom surface of the bend bar 723 is flush with the inner bottom surface of the matching groove 711, so as to facilitate the alignment of the longitudinal position of the circuit board workpiece; the inner corner of the bend bar 723 is greater than 90 degrees. On the one hand, there is enough space between the two contour side bars 721 to facilitate the loading of the circuit board workpiece. On the other hand, the inclined structure of the inner side surface of the bend bar 723 is used to position the bottom end of the circuit board, so as to facilitate the alignment of the lateral position of the circuit board workpiece.

[0058] As an embodiment of the present invention, refer to Figure 4 and Figure 5 An L-shaped strip 731 is installed at the bottom end of the extrusion plate 73, and the L-shaped strip 731 is located at the lower end of the back plate 72, and the side end of the L-shaped strip 731 matches the bottom side groove 714. A connecting spring 732 is evenly installed at the side edge of the extrusion plate 73, and one end of the connecting spring 732 is connected to the side surface of the back plate 72. Matching columns 733 are set at the four corners of the extrusion plate 73, and the matching columns 733 match the sliding hole groove 722.

[0059] In this embodiment, the end of the matching post 733 is set to a rounded surface to reduce friction when the matching post 733 is initially inserted into the hole of the circuit board workpiece. When the matching post 733 completely enters the hole of the circuit board workpiece, further calibration and positioning of the workpiece is achieved, so that the circuit board workpiece fits in and corresponds to the matching groove 711, avoiding squeezing and collision during clamping.

[0060] As an embodiment of the present invention, refer to Figure 5 and Figure 6 A hydraulic telescopic rod 715 is installed at the bottom end of the inner side of the rear plate 74 , and one end of the hydraulic telescopic rod 715 is connected to the inner end surface of the L-shaped strip plate 731 .

[0061] In this embodiment, the hydraulic telescopic rod 715 is installed on the inner side of the L-shaped strip 731 . The L-shaped strip 731 can support the back plate 72 and provide space for the installation of the hydraulic telescopic rod 715 .

[0062] As an embodiment of the present invention, refer to Figure 7 The guide member 8 includes a fixed sleeve 81 fixedly installed on the inner wall of the treatment pool 1 and a sliding rod 82 arranged on the inner side of the fixed sleeve 81. The fixed sleeve 81 matches the matching sleeve groove 61. The bottom surface of the sliding rod 82 is connected to the top of the U-shaped tube 96. A groove 83 is provided on one side surface of the sliding rod 82. A lower inclined surface 84 is provided on the bottom surface of the groove 83. A side vertical bar 85 is installed on one side of the fixed sleeve 81. One end of the extrusion rod 64 is in contact with the side surface of the side vertical bar 85. Connecting springs 87 are installed at both ends of the side vertical surface of the side vertical bar 85. One end of the connecting spring 87 is connected to the side surface of the fixed sleeve 81. An extrusion column 86 is provided between the two connecting springs 87. The extrusion column 86 is limitedly connected to the lower inclined surface 84.

[0063] In this embodiment, a bare groove is formed on the surface of the fixed sleeve 81 at the position of the groove 83 , and the size of the groove allows the groove 83 to be raised and lowered.

[0064] Working principle: The circuit board workpiece to be processed is loaded into the protective clamp 7. After it is matched and clamped, the protective clamp 7 wraps and protects the area of ​​the circuit board that is not covered by the copper foil. At the same time, the filter slot of the partition filter 9 is closed, and the partition filter 9 divides the processing pool 1 into two upper and lower areas. The precipitated reactants are intercepted in the lower area of ​​the partition filter 9, and the upper area of ​​the partition filter 9 is replenished with solution for mixing, and a new round of workpiece immersion treatment begins. After the treatment is completed, the workpiece is taken out of the protective clamp 7, the filter slot of the partition filter 9 is opened, and the new precipitate produced by the reaction will sink along the filter slot.

[0065] Specifically, the workpiece is loaded into the positioning area 75, and the two corners of the bottom end of the workpiece are aligned with the inner corners of the bend bar 723 by guiding the inclined side end of the bend bar 723. At this time, the contour edge of the workpiece corresponds to the inner contour of the matching groove 711, and the extrusion plate 73 is pushed to translate as a whole by the hydraulic telescopic rod 715. In the process of the workpiece being pushed into the inner side of the matching groove 711, the back plate 72 and the extrusion plate 73 are gradually approached by the elastic structure of the connecting spring 732, and the matching post 733 passes through the sliding hole groove 722, and its end corresponds to the hole position of the workpiece. With the displacement of the extrusion plate 73, the matching post 733 completely enters the four ends of the workpiece In the hole position of the corner, the matching post 733 blocks the hole position to further locate and calibrate the position of the workpiece. At this time, the workpiece is pushed into the inner side of the matching groove 711, the back plate 72 is fitted with the front plate 71, the contour side strip 721 is fitted to the two side ends of the front plate 71, the bend strip 723 is engaged with the matching bend groove 713, the L-shaped strip plate 731 is engaged with the bottom side groove 714, and the workpiece is limited by the stop block 712, so that the back of the workpiece is covered by the back plate 72, the four sides of the workpiece are buckled by the matching groove 711, and the hole position of the workpiece is engaged by the matching post 733, thereby completing the wrapping protection of the area of ​​the workpiece not covered by the copper foil;

[0066] When the workpiece is not placed in the immersion liquid, the liquid surface is static and the sediment in the liquid sinks along the filter tank;

[0067] During the process of the extrusion plate 73 being pushed by the hydraulic telescopic rod 715, i.e., the process of the back plate 72 and the front plate 71 being pressed against each other, one end of the extrusion rod 64 squeezes the surface of the side vertical bar 85 through the connection effect of the connection bar 63, and the side vertical bar 85 gradually approaches the fixed sleeve 81, and the extrusion column 86 slides from the lowest end of the lower inclined surface 84 to the highest end of the lower inclined surface 84. By utilizing the inclined surface structure of the lower inclined surface 84, the sliding rod 82 moves downward along the inside of the fixed sleeve 81, and through the connection effect of the U-shaped tube 96 and the connecting rod 95 on the several groups of movable triangular strips 93, the several groups of movable triangular strips 93 move downward at the same time and engage with the triangular area 94, so that the filter tank of the separation filter element 9 is completely blocked, and the sediment in the solution is separated at the bottom of the treatment tank 1;

[0068] The three workpieces are immersed in the immersion liquid through the horizontal frame 6 and the slide rail 5. As the reaction progresses, new liquid is continuously added and the solution is stirred and mixed to keep the solution concentration stable.

[0069] After the reaction is completed, the three protective clamps 7 are separated from the soaking liquid, and the back plate 72 and the extrusion plate 73 are quickly returned to their positions by the hydraulic telescopic rod 715. The elastic structure of the connecting spring 1 732 is used to match the post 733 to separate from the hole position of the circuit board, and the circuit board is taken out;

[0070] When the extrusion plate 73 returns to its original position, the side upright bar 85 loses the extrusion effect of the extrusion rod 64, and the side upright bar 85 quickly returns to its original position by utilizing the elastic structure of the connecting spring 2 87. The extrusion column 86 slides from the highest end of the lower slope 84 to the lowest end of the lower slope 84, and several groups of movable triangular strips 93 are raised, and the triangular area 94 returns to an empty slot state, and the new sediment produced by the reaction naturally sinks to the bottom of the filter tank.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit board etching and tin stripping device, comprising a processing pool (1), a pier (2), a crossbeam (3), a vertical beam (4), a slide rail (5) and a cross frame (6), wherein the two vertical beams (4) are respectively arranged on the upper surface of the two side ends of the processing pool (1), the pier (2) is installed at the top of the vertical beam (4), the cross beam (3) is located between the two piers (2), the slide rail (5) is arranged on the side surface of the vertical beam (4), and the cross frame (6) is installed at the lower end of the cross beam (3), characterized in that: The invention also comprises a protective clamp (7), a guide member (8) and a partition filter (9), wherein the guide member (8) is mounted at both ends of the horizontal frame (6), three of the protective clamps (7) are arranged at the lower end of the horizontal frame (6), and the three protective clamps (7) are located between two guide members (8), and the partition filter (9) is mounted at the inner bottom end of the processing tank (1), and the protective clamp (7) is used for loading and unloading circuit boards to be processed, and the four side edge surfaces, the back surface and the inner groove surface of the hole of the circuit board are covered by the clamping of the protective clamp (7), and the closing of the partition filter (9) is controlled, and the closed partition filter (9) divides the chamber of the processing tank (1) into upper and lower areas, and the opening of the partition filter (9) is controlled by unloading the circuit board, and the opened partition filter (9) connects the upper and lower areas of the processing tank (1).

2. A circuit board etching and tin stripping device according to claim 1, characterized in that: The separation filter element (9) comprises a contour ring frame (91), a triangular fixed strip (92), a movable triangular strip (93), a triangular area (94), a connecting rod (95) and a U-shaped tube (96); the contour ring frame (91) is mounted on the side wall of the bottom end of the treatment tank (1); the triangular fixed strips (92) are evenly arranged and distributed on the inner side of the contour ring frame (91); the movable triangular strip (93) is centrally located between the triangular fixed strips (92); the triangular area (94) is arranged between the two triangular fixed strips (92); the connecting rod (95) is mounted on the middle end of the upper surface of the movable triangular strip (93); the U-shaped tube (96) is arranged on the upper end of the movable triangular strip (93); and the top end of the connecting rod (95) is connected to the lower surface of the U-shaped tube (96).

3. A circuit board etching and tin stripping device according to claim 1, characterized in that: Both ends of the cross frame (6) are provided with matching sleeve grooves (61), which match the guide member (8). Three L-shaped connecting rods (62) are installed on the lower surface of the cross frame (6), and one end of the L-shaped connecting rod (62) is connected to the side surface of the protective clamp (7).

4. A circuit board etching and tin stripping device according to claim 3, characterized in that: The protective clamp (7) comprises a front plate (71), a back plate (72), an extrusion plate (73), a rear plate (74), a positioning area (75) and a bottom strip (76); the side surface of the rear plate (74) is connected to one end of the L-shaped connecting rod (62); the front plate (71) is installed on one side of the rear plate (74); the bottom strip (76) is arranged at the bottom ends of the front plate (71) and the rear plate (74); the front plate (71), the rear plate (74) and the bottom strip (76) are an integrated structure; the back plate (72) is arranged between the front plate (71) and the rear plate (74); the extrusion plate (73) is installed between the back plate (72) and the rear plate (74); the bottom end of the extrusion plate (73) is connected to the surface of the bottom strip (76) in a limiting manner; and the positioning area (75) is arranged between the front plate (71) and the back plate (72).

5. A circuit board etching and tin stripping device according to claim 4, characterized in that: The top ends of the three extrusion plates (73) are provided with connecting rods (63), and the side surfaces of both ends of the connecting rod (63) are provided with extrusion rods (64), and one end of the extrusion rod (64) is connected to the guide member (8).

6. A circuit board etching and tin stripping device according to claim 4, characterized in that: The surface of the front plate (71) is provided with a matching groove (711), the matching groove (711) matches the size of the circuit board workpiece, the four corners of the matching groove (711) are each equipped with a stop block (712), the side surface of the bottom end of the front plate (71) is provided with a bottom side groove (714), and the two corners of the lower end of the matching groove (711) are each provided with a matching turning groove (713).

7. A circuit board etching and tin stripping device according to claim 6, characterized in that: The two side ends of the back plate (72) are provided with contour side strips (721), the spacing between the two contour side strips (721) matches the outer dimensions of the front plate (71), the bottom end of the contour side strip (721) is provided with a bend strip (723), the height of the inner bottom surface of the bend strip (723) is flush with the inner bottom surface of the matching groove (711), and the inner corner of the bend strip (723) is on the same horizontal line as the inner corner of the bottom end of the matching groove (711), and the four corner ends of the back plate (72) are provided with sliding hole grooves (722), and the sliding hole grooves (722) match the hole positions of the circuit board workpiece.

8. A circuit board etching and tin stripping device according to claim 7, characterized in that: An L-shaped strip plate (731) is installed at the bottom end of the extrusion plate (73), and the L-shaped strip plate (731) is located at the lower end of the back plate (72), and the side end of the L-shaped strip plate (731) matches the bottom side groove (714). Connecting springs (732) are evenly installed at the side edge of the extrusion plate (73), and one end of the connecting spring (732) is connected to the side surface of the back plate (72). Matching posts (733) are arranged at the four corners of the extrusion plate (73), and the matching posts (733) match the sliding hole groove (722).

9. A circuit board etching and tin stripping device according to claim 8, characterized in that: A hydraulic telescopic rod (715) is installed at the bottom end of the inner side of the rear plate (74), and one end of the hydraulic telescopic rod (715) is connected to the inner end surface of the L-shaped strip plate (731).

10. A circuit board etching and tin stripping device according to claim 2, characterized in that: The guide member (8) comprises a fixed sleeve (81) fixedly mounted on the inner wall of the treatment tank (1) and a sliding rod (82) arranged inside the fixed sleeve (81), the fixed sleeve (81) matches the matching sleeve groove (61), the bottom surface of the sliding rod (82) is in contact with the top end of the U-shaped tube (96), a groove (83) is provided on one side surface of the sliding rod (82), and a lower inclined surface (84) is provided on the bottom surface of the groove (83). A side vertical bar (85) is installed on one side of the fixed sleeve (81), one end of the extrusion rod (64) is in contact with the side surface of the side vertical bar (85), and two connecting springs (87) are installed on both ends of the side vertical surface of the side vertical bar (85), one end of the connecting spring (87) is connected to the side surface of the fixed sleeve (81), and an extrusion column (86) is arranged between the two connecting springs (87), and the extrusion column (86) is limitedly connected to the lower inclined surface (84).

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