Solar printing screen electroforming equipment
Printed screens are manufactured through electroforming technology, and the electroforming liquid flow of spiral channels is used to achieve precision molding of patterned wire grooves, solving the problems of graphic dislocation, silver paste transfer obstacles and hidden cracks in the printing process of existing screen printing screens, and achieving higher precision and higher efficiency photovoltaic cell printing.
Patent Information
- Application Number
- CN202311748922.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2025-06-20
AI Technical Summary
During the printing process, the existing high-precision screen printing plates have problems such as graphic dislocation, silver paste transfer obstacles and hidden cracks in the printed fine grid lines, which affects the power generation efficiency of the battery cells.
The printed screen is manufactured using electroforming technology, and a helical channel is formed through the anode spiral plate and the cathode spiral plate. The spiral flow of the electroforming liquid is used to achieve precision molding of the patterned thread grooves, avoiding the weft knits of warp and weft lines and improving the efficiency of silver paste passage.
The extreme accuracy and high aspect ratio of the printed graphic wire trough are achieved, which far exceeds the precision of the existing high-precision screen printing plate, improves the power generation efficiency of photovoltaic cells, and ensures the additive production of fine precision battery grid lines.
Smart Images
Figure CN120174433A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a production device for manufacturing a printing screen for solar cells, and more particularly to a production device for electroforming a printing screen for solar photovoltaic cells. Background Art
[0002] The electric energy generated by a solar photovoltaic cell is led out through the conductive grid lines on the cell surface. The setting and manufacturing quality of the conductive grid lines have a great influence on the power generation efficiency of the photovoltaic cell. Currently, the conductive grid lines of photovoltaic cells are printed by transferring silver conductive paste through a screen onto the surface of the photovoltaic cell by screen printing technology. Without changing the cell structure, the printing process has a significant impact on the cell efficiency. Among them, the optimization of the front grid line pattern can significantly improve the cell efficiency. Therefore, in recent years, the designed line width of the front grid screen has become thinner and thinner, which requires the screen used for grid line printing to be more and more refined and precise. Currently, the wire diameter of the wire mesh in the printing screen has been thinned to 10 microns and below, and the mesh count has reached or even exceeded 600 meshes. The design and production of the wire mesh have basically reached the limit. The further refinement of the screen printing plate has become a bottleneck for further improving the power generation efficiency of photovoltaic cells.
[0003] Currently, this kind of high-precision screen printing screen mainly has several deficiencies: First, the current almost extreme wire diameter and tension of the wire mesh are very difficult to process and produce by conventional production processes. Therefore, the wire mesh for high-precision printing screens of solar photovoltaic cells almost depends on imports, and the price is very high, and the supply is limited. Second, since the printing wire mesh is woven from extremely thin metal wires, the wire mesh of the screen is prone to wire misalignment during printing, affecting the precision printing accuracy of the pattern. Third, and most importantly, since the wire mesh of screen printing is composed of warp and weft that intersect perpendicularly to each other, countless cross nodes are naturally formed at the intersection of the warp and weft. When these nodes happen to be located in the printing grooves of the screen, the existence of these nodes will cause a certain obstruction to the transfer of silver paste during the printing process. Even if the printing groove happens to fall between two adjacent parallel wires so that there are no mesh knots in the printing groove, there are still warp or weft in the printing groove. These nodes or warp and weft will still cause obstruction to the transfer of silver paste, and this kind of obstruction is particularly obvious when printing fine grid lines, resulting in hidden cracks in the printed grid lines, affecting current transmission, and even causing broken grids. Therefore, due to the influence of its own structural characteristics, the screen printing screen has some inherent defects that cannot be overcome. Summary of the Invention
[0004] Aiming at the above deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a solar printing screen electroforming device that can manufacture a printing pattern groove with higher precision, no printing pattern misalignment, and higher silver paste passing efficiency.
[0005] To solve the above technical problems, the electroforming device for a solar printing screen plate of the present invention includes an electroforming tank. An anode spiral plate and a cathode spiral plate are arranged at intervals in the electroforming tank. A spiral channel is formed between the anode spiral plate and the cathode spiral plate. A reflux central pipe is located at the outlet end of the spiral channel, and a flow injection pipe is located at the inlet end of the spiral channel. The cathode spiral plate includes a cathode spiral support plate, and an electroforming template is movably installed on the cathode spiral support plate. The anode spiral plate includes an anode spiral support plate, an anode plate is installed on the anode spiral support plate, and swing blades are swingably arranged on the anode spiral support plate.
[0006] Preferably, a semiconductor refrigeration plate is installed on the outer side of the tank wall of the electroforming tank; a heater is installed in the electroforming tank, and a temperature sensor is also installed in the electroforming tank.
[0007] Preferably, the electroforming tank is provided with a vertical stirrer and / or a horizontal stirrer.
[0008] Preferably, the tank cavity of the electroforming tank and the reflux central pipe are connected in parallel and then lead to the flow injection pipe through a circulation pipeline, a filter and a circulation pump; the reflux central pipe includes a reflux pipe body, and a number of reflux pipe holes are vertically arranged in a staggered manner on the reflux pipe body; the flow injection pipe includes a flow injection pipe body, and the flow injection pipe cavity surrounded by the flow injection pipe body is communicated with the circulation pipeline; flow injection pipe holes are arranged on the flow injection pipe body, and the flow injection pipe holes face the inlet end of the spiral channel.
[0009] Preferably, the electroforming template is detachably inserted into the guide mold groove of the cathode spiral support plate; a pattern insulating layer is fixedly arranged on the deposition surface of the electroforming template, and an insulating coating layer is coated on the non-deposition surface of the electroforming template.
[0010] Preferably, the pattern insulating layer and the insulating coating layer are photosensitive latex cured layers or polymer material layers, and the polymer material is PET, PE, PI, PU, PVC, PP, PA, ABS, PMMA or POM.
[0011] Preferably, the cross section of the pattern insulating layer is rectangular or trapezoidal.
[0012] Preferably, the pattern insulating layer includes a pattern insulating bottom layer arranged on the deposition surface of the electroforming template, a conductive film is arranged on the pattern insulating bottom layer, and a pattern insulating surface layer is arranged on the conductive film; the width of the pattern insulating bottom layer is greater than the width of the pattern insulating surface layer.
[0013] Preferably, a number of swingable swing blades are installed on the plate surface of the anode spiral plate facing the cathode spiral plate.
[0014] Preferably, the swing blade is swingably mounted on the blade swing shaft through a swing bushing, and the blade swing shaft is fixedly mounted on the anode spiral support plate; the weight or length of the blade on one side of the swing axis of the swing blade is greater than that on the other side of the swing axis.
[0015] In the above structure, since the printing screen plate is fabricated by electroforming, the manufacturing process of the solar printing screen plate is fundamentally changed. Its uniqueness lies in that the pattern wire grooves on the printing plate can be grown atom by atom, enabling extreme precision and high aspect ratio. It can not only far exceed the precision of the existing high-precision silk screen printing plates, but also achieve higher-precision printing of photovoltaic cell wafers, thereby ensuring further improvement of the power generation efficiency of the cell wafers and truly realizing the additive manufacturing of fine and precise cell grid lines. The electroformed non-woven wire mesh forms a flat metal screen, that is, the surface of the screen plate is flat-shaped without any weft and warp knitting nodes, the silver paste can pass smoothly, and the opening rate of the pattern wire grooves can reach 100%. Also, because a spiral electroforming solution passage formed by the anode spiral plate and the cathode spiral plate is adopted in the present invention, the contact probability between the electroforming solution and the electroforming mold is greatly increased, the concentration polarization of the electroforming solution is reduced, it is convenient to increase and stabilize the current density between the cathode and anode plates, improve the deposition uniformity of the anode ions on the surface, and is beneficial to improving the electroforming quality and electroforming efficiency. Further, since a swing blade is swingably arranged on the anode spiral plate, the swing blade can stir the electroforming solution in the electroforming channel by means of the flow impact force of the electroforming solution to balance the component distribution in the electroforming solution, improve the uniformity of the deposition of metal ions on the electroforming mold, ensure the dimensional accuracy and surface finish of the electroformed screen plate, and is more conducive to manufacturing a printing screen plate with a precise and fine printing pattern. The electroforming template is movably arranged on the cathode spiral support plate, which is beneficial to the rapid installation and removal of the electroforming template and can improve the efficiency of the electroforming mold in electroforming production. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The electroforming equipment for the solar printing screen plate of the present invention will be further described below in conjunction with the drawings and specific embodiments.
[0017] Figure 1 is a schematic cross-sectional structure view of a specific embodiment of the electroforming equipment for the solar printing screen plate of the present invention;
[0018] Figure 2 is Figure 1 a schematic top view structure view of
[0019] Figure 3 is Figure 1 a schematic front view structure view of the cathode spiral plate in
[0020] Figure 4 is Figure 3 a schematic top view structure view of
[0021] Figure 5 is Figure 4 a partial schematic view of the unfolded structure;
[0022] Figure 6 is Figure 5 the A - A sectional view in
[0023] Figure 7 is Figure 4 a front - view structure schematic of the electroforming template in
[0024] Figure 8 is Figure 7 a top - view sectional structure schematic of
[0025] Figure 9 is Figure 8 a magnified view of a specific structure of part Ⅰ in
[0026] Figure 10 is Figure 8 a magnified view of another specific structure of part Ⅰ in
[0027] Figure 11 is Figure 8 a magnified view of yet another specific structure of part Ⅰ in
[0028] Figure 12 is Figure 1 a front - view structure schematic of the anode spiral plate in
[0029] Figure 13 is Figure 12 a top - view direction structure schematic of
[0030] Figure 14 is Figure 12 the B - B sectional view in
[0031] Figure 15 is Figure 1 a front - view structure schematic of the reflux central pipe in
[0032] Figure 16 is Figure 1 a front - view structure schematic of the injection flow pipe in
[0033] Figure 17 is Figure 16 a top - view direction structure schematic of
[0034] Figure 18 is Figure 16 a left - top - view direction structure schematic of
[0035] In the figure, 1 is the reflux central pipe, 2 is the anode spiral plate, 201 is the anode spiral support plate, 202 is the anode plate, 3 is the cathode spiral plate, 301 is the cathode spiral support plate, 302 is the electroforming template, 303 is the guide mold groove plate, 304 is the insulating coating layer, 305 is the deposition surface, 306 is the pattern insulating layer, 307 is the pattern insulating bottom layer, 308 is the conductive film, 309 is the pattern insulating top layer, 4 is the electroforming tank, 5 is the semiconductor refrigeration plate, 6 is the vertical stirrer, 7 is the heater, 8 is the electroforming power supply, 9 is the horizontal stirrer, 10 is the temperature sensor, 11 is the circulation pipeline, 12 is the circulation pump, 13 is the filter, 14 is the injection pipe, 15 is the partition plate, 16 is the stirring liquid paddle, 161 is the swinging blade, 162 is the swinging shaft sleeve, 163 is the blade swing shaft, 164 is the swing shaft nut, and 17 is the electroforming solution. Specific implementation mode
[0036] Figure 1 、 Figure 2 As shown in the figure, the electroforming device for a solar printing stencil includes an electroforming tank 4, and the electroforming tank 4 is filled with an electroforming solution 17 during electroforming. An anode spiral plate 2 and a cathode spiral plate 3 are arranged at intervals in the electroforming tank 4. The anode spiral plate 2 is fixedly installed at the bottom of the electroforming tank 4 through the anode plate at its bottom, and the anode spiral plate 2 and the bottom anode plate form a cup-shaped anode structure. A cathode spiral plate 3 is also fixedly installed at the bottom of the electroforming tank 4. The anode spiral plate 2 and the cathode spiral plate 3 are arranged at intervals, and a spiral channel is formed between the anode spiral plate 2 and the cathode spiral plate 3. The anode spiral plate 2 and the cathode spiral plate 3 are respectively electrically connected to the "+" pole and the "-" pole of the electroforming power supply 8.
[0037] A reflux central pipe 1 is arranged at the central position of the above-mentioned spiral channel. The reflux central pipe 1 is fixedly installed at the bottom of the electroforming tank 4 and is located at the central outlet end position of the above-mentioned spiral channel. An injection pipe 14 is fixedly arranged at the inlet end of the spiral channel. After the reflux central pipe 1 and the cavity of the electroforming tank 4 of the spiral channel are connected in parallel through the circulation pipeline 11, they then lead to the injection pipe 14 through the circulation pipeline 11, the filter 13 and the circulation pump 12. The diameter D of the reflux central pipe 1 is larger than the diameter d of the circulation pipeline 11. Preferably, the diameter D of the reflux central pipe 1 should be equal to (3 - 6) times the circulation pipe diameter d, which is beneficial to the balance and reflux of the electroforming solution. The filter 13 and the circulation pump 12 both adopt general equipment for common electroforming tanks.
[0038] A vertical stirrer 6 and a horizontal stirrer 9 are also arranged in the electroforming tank 4. The vertical stirrer 6 can form a vertical stirring liquid flow in the electroforming tank 4, while the horizontal stirrer 9 can form a circumferential stirring liquid flow in the electroforming tank 4. Both the vertical stirrer 6 and the horizontal stirrer 9 adopt paddle stirrers.
[0039] A heater 7 is also installed in the electroforming bath 4, and the heater 7 uses an electric heater; a semiconductor refrigeration plate 5 is installed on the outer side of the tank wall of the electroforming bath 4, and the semiconductor refrigeration plate 5 includes a number of semiconductor refrigeration chips; at least two temperature sensors 10 are installed in the electroforming bath 4. One temperature sensor 10 is installed on the anode spiral plate 2 or the cathode spiral plate 3, and the other temperature sensor 10 is installed on the inner wall of the tank of the electroforming bath 4. During electroforming, the temperature sensor 10 transmits the working temperature of the electroforming solution 17 in the electroforming bath 4 to the electroforming bath controller to control the heater 7 and the semiconductor refrigeration plate 5. The heater 7 in the electroforming bath 4 can directly heat the electroforming solution 17, and installing the semiconductor refrigeration plate 5 on the outer side of the tank wall of the electroforming bath 4 can not only refrigerate or heat the electroforming solution in the electroforming bath 4, but also increase the heat conduction area, which is beneficial to the precise control of the temperature of the electroforming solution.
[0040] As Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, the cathode spiral plate 3 bent in a spiral shape includes a cathode spiral support plate 301, and a guide die groove plate 303 is provided on the cathode spiral support plate 301. A number of electroforming templates 302 are movably inserted into the guide die groove formed by the cathode spiral support plate 301 and the guide die groove plate 303. The overall structure of the cathode spiral support plate 301 and the guide die groove plate 303 can be made of non-metallic materials such as nylon and plastic, or can be made of metallic materials. When the cathode spiral support plate 301 and the guide die groove plate 303 are made of non-metallic materials, each electroforming template 302 is directly electrically connected to the electroforming power supply 8, and when the cathode spiral support plate 301 and the guide die groove plate 303 are made of metallic materials, the electroforming template 302 is electrically connected to the electroforming power supply 8 through the cathode spiral support plate 301.
[0041] As Figure 7 , Figure 8 shown, the electroforming template 302 includes an electroforming template body, which is made of metallic material and is electrically connected to the electroforming power supply 8. A pattern insulating layer 306 is fixedly provided on the electroforming deposition surface 305 of the electroforming template body, and the pattern insulating layer 306 corresponds to the printing wire grooves on the printing screen plate. An insulating coating layer 304 is coated on the non-deposition surface of the electroforming template body. The pattern insulating layer 306 and the insulating coating layer 304 are made by laser etching of polymer materials, and the polymer material is a PI film. The polymer material can also be PET, PE, PU, PVC, PP, PA, ABS, PMMA or POM. The pattern insulating layer 306 and the insulating coating layer 304 can also be formed by photosensitive curing of photosensitive latex.
[0042] As Figure 9As shown, the pattern insulating layer 306 on the template body of the electroforming template 302 is in the shape of an elongated strip, and its cross-section is a rectangular structure. The pattern insulating layer 306 corresponds to the pattern wire grooves of the printing plate stencil, and the flat plate surface to be electroformed will be deposited between the two pattern insulating layers 306.
[0043] As Figure 10 shown, in order to improve the silver paste passing performance of the fine grid wire grooves of the printing plate, it is desired to form a trapezoidal notch that is larger at the top and smaller at the bottom between the two printing fine grid wire grooves. Therefore, the cross-sectional shape of the pattern insulating layer 306 on the template body is an inverted trapezoidal structure, and the inclination angle α of the waist surface of the trapezoid is 20° - 30°.
[0044] As Figure 11 shown, in order to improve the silver paste passing performance of the fine grid of the printing plate, in this embodiment, the cross-sectional shape of the pattern printing fine grid wire groove is a stepped notch that is wider at the top and narrower at the bottom. For this reason, a pattern insulating bottom layer 307 that is closely attached to the body is provided on the deposition surface 305 of the template body of the electroforming template 302. A conductive film 308 is laid on the top surface of the pattern insulating bottom layer 307, and the metal material of the conductive film 308 is the same as that of the template body. A pattern insulating surface layer 309 that is closely attached to it is also provided on the conductive film 308. Both the pattern insulating bottom layer 307 and the pattern insulating surface layer 309 are made of polymer materials or are formed by photosensitive latex photosensitive curing.
[0045] As Figure 12 、 Figure 13 shown, the anode spiral plate 2 that is spirally bent includes anode spiral support plates 201. The anode spiral support plates 301 are made of conductive metal materials. An anode plate 202 is installed on the anode spiral support plate 201, and the anode plate 202 is made of a nickel plate. Of course, it can also be plates such as iron, copper, gold, and silver. An anode bottom plate is also fixedly connected to the bottom of the spiral cylindrical anode spiral plate 2. The anode bottom plate and the anode spiral plate 2 form a cup-shaped structure with an upward opening, and this cup-shaped structure is beneficial to evenly distributing the electroforming solution components to obtain a high-quality electroformed printing plate.
[0046] A number of swing blades 161 that can swing are installed on the plate surface of the anode spiral plate 2 facing the cathode spiral plate 3. The swing blades 161 are evenly distributed in three layers on the plate surface of the cathode spiral plate 2.
[0047] As Figure 14As shown in the figure, a swing shaft sleeve 162 is embedded in the mounting hole of the swing blade 161. The swing shaft sleeve 162 is movably sleeved on the blade swing shaft 163. The blade swing shaft 163 is fixedly connected to the anode spiral support plate 201 through a threaded section at one end and a swing shaft nut 164 thereon, so that the swing blade 161 can swing or rotate around the axis of the blade swing shaft 163. The swing blade 161, the swing shaft sleeve 162 and the blade swing shaft 163 form a stirring swing blade 16, and the swing blade 161, the swing shaft sleeve 162 and the blade swing shaft 163 are all made of corresponding materials such as nylon and plastic. The length of the outer extension blade of the swing blade 161 on one side of the axis of the swing shaft is greater than the length of the outer extension blade on the other side of the axis of the swing shaft. Or the weight of the outer extension blade of the swing blade 161 on one side of the axis of the swing shaft is greater than the weight of the outer extension blade on the other side of the axis of the swing shaft. Thus, the center of gravity of the swing blade 161 deviates from the axis of the blade swing shaft 163. The swing blade 161 is lifted by the impact of the electroforming solution flowing in the spiral channel, and at the same time, the swing blade 161 droops under the action of its own gravity. Therefore, under the intermittent action of the impact of the electroforming solution and its own gravity, the swing blade 161 continuously swings around the axis of the blade swing shaft 163, thereby forming a stirring and mixing effect on the electroforming solution in the channel.
[0048] As Figure 15 shown, the return pipe body 101 of the return center pipe 1 is a circular pipe. The upper end of the circular pipe is fixedly connected with a return pipe end plate 103. A return flange 104 is fixedly connected to the lower end of the return pipe body 101. The return pipe body 101 is connected to the pipeline of the circulation pipeline 11 through the return flange 104. The inner pipe diameter D of the return pipe body 101 is greater than the pipe diameter d of the pipeline of the circulation pipeline 11, and D=(2-3)d. A number of return pipe holes 102 are vertically and staggeredly arranged on the return body 101 of the return center pipe 1.
[0049] As Figure 16 , Figure 17 and Figure 18 shown, the injection pipe 14 includes an injection pipe body 142 with a rectangular cross-section. The rectangular injection pipe cavity surrounded by the injection pipe body 142 is connected to the pipeline of the circulation pipeline 11 through three injection funnels 143. A number of injection pipe holes 141 are arranged vertically on the injection pipe body 142. The injection pipe holes 141 face the inlet end of the spiral channel formed between the anode spiral plate 2 and the cathode spiral plate 3. Under the action of the circulation pump 12, the electroforming solution 17 from the return center pipe 1 and the electroforming tank cavity flows through the circulation pipeline 11 to the injection pipe 14, and sprays from the injection pipe holes 141 on the injection pipe 14 to the inlet end of the spiral channel, thereby forming a flowing electroforming solution flow in the spiral channel.
[0050] Some preferred embodiments of the present invention are given above, but the present invention is not limited thereto. Without departing from the basic idea of the present invention, there are many improvements and transformations, and as long as the improvements and transformations do not violate the basic principles of the present invention, they fall within the protection scope of the present invention.
Claims
1. A solar printing screen electroforming device, including an electroforming tank (4), characterized in that: In the electroforming tank (4), an anode spiral plate (2) and a cathode spiral plate (3) are arranged at intervals. A spiral channel is formed between the anode spiral plate (2) and the cathode spiral plate (3). The reflux central pipe (1) is located at the outlet end of the spiral channel, and the injection pipe (14) is located at the inlet end of the spiral channel; the cathode spiral plate (3) includes a cathode spiral support plate (301), and an electroforming template (302) is movably installed on the cathode spiral support plate (301); the anode spiral plate (2) includes an anode spiral support plate (201), an anode plate (202) is installed on the anode spiral support plate (201), and a swing paddle (161) is swingably arranged on the anode spiral support plate (201).
2. The solar printing screen electroforming device according to claim 1, characterized in that: A semiconductor refrigeration plate (5) is installed on the outer side of the tank wall of the electroforming tank (4); a heater (7) is installed in the electroforming tank (4), and a temperature sensor (10) is also installed in the electroforming tank (4).
3. The solar printing screen electroforming device according to claim 1, characterized in that: The electroforming tank (4) is provided with a vertical stirrer (6) and / or a horizontal stirrer (9).
4. The solar printing screen electroforming device according to claim 1, characterized in that: The tank cavity of the electroforming tank (4) and the reflux central pipe (1) are connected in parallel and then lead to the injection pipe (14) through a circulation pipeline (11), a filter (13) and a circulation pump (12); the reflux central pipe (1) includes a reflux pipe body (101), and a number of reflux pipe holes (102) are arranged vertically and staggeredly on the reflux pipe body (101); the injection pipe (14) includes an injection pipe body (142), and the injection pipe cavity surrounded by the injection pipe body (142) is communicated with the circulation pipeline (11); injection pipe holes (141) are arranged on the injection pipe body (142), and the injection pipe holes (141) face the inlet end of the spiral channel.
5. The solar printing screen electroforming device according to claim 1, characterized in that: The electroforming template (302) is detachably inserted into the guide die groove of the cathode spiral support plate (301); a pattern insulating layer (306) is fixedly arranged on the deposition surface (305) of the electroforming template (302), and an insulating coating layer (304) is coated on the non-deposition surface of the electroforming template (302).
6. The solar printing screen electroforming device according to claim 5, characterized in that: The pattern insulating layer (306) and the insulating coating layer (304) are photosensitive latex cured layers or polymer material layers, and the polymer material is PET, PE, PI, PU, PVC, PP, PA, ABS, PMMA or POM.
7. The solar printing screen electroforming device according to claim 5 or 6, characterized in that: The cross section of the pattern insulating layer (306) is rectangular or trapezoidal.
8. The solar printing screen electroforming device according to claim 5 or 6, characterized in that: The pattern insulating layer (306) includes a pattern insulating bottom layer (307) arranged on the deposition surface (305) of the electroforming template (302), a conductive film (308) is arranged on the pattern insulating bottom layer (307), and a pattern insulating surface layer (309) is arranged on the conductive film (308); the width of the pattern insulating bottom layer (307) is greater than the width of the pattern insulating surface layer (309).
9. The solar printing screen electroforming device according to claim 1, characterized in that: A number of swing paddles (161) are installed on the plate surface of the anode spiral plate (2) facing the cathode spiral plate (3).
10. The solar printing screen electroforming device according to claim 9, characterized in that: The swing blade (161) is swingably mounted on the blade swing shaft (163) through a swing bushing (162), and the blade swing shaft (163) is fixedly mounted on the anode spiral support plate (201); the weight or length of the blade on one side of the swing axis of the swing blade (161) is greater than the weight or length of the blade on the other side of the swing axis.