A preheating tank for preparing mixed materials for photosensitive wet film of printed circuit board

Abstract

The present invention relates to the technical field of preheating tanks, and discloses a preheating tank for preparing mixed materials of photosensitive wet film for printed circuit boards, comprising a shell, a cover plate fixedly mounted on the top of the shell, a feeding port opened on the top outer wall of the cover plate, a stirring assembly fixedly mounted on the top of the cover plate, a driving assembly fixedly mounted on the top of the stirring assembly, a discharging assembly fixedly mounted on the outer wall of the shell, and a humidifying assembly fixedly mounted on the inner edge of the cover plate. The motor drives the driving wheel to rotate through a connector, so that the film-covering plate located on the top of the rubber water bag moves, thereby squeezing the rubber water bag, so that the water in the inner cavity of the rubber water bag flows to the inner cavity of the stirring frame through a connecting pipe, and the water in the inner cavity of the stirring frame flows to the inner cavity of another rubber water bag through an outlet slot to achieve cooling of the stirring frame.

Description

Technical Field

[0001] The invention relates to the technical field of preheating tanks, in particular to a preheating tank for preparing a mixed material for a photosensitive wet film used for a printed circuit board. Background Art

[0002] In the process of producing photosensitive wet film for PCB (printed circuit board), the stirring kettle used for the production of photosensitive wet film for PCB needs to stir and mix the filler containing epoxy resin, photosensitizer and solvent;

[0003] At present, the stirring kettle used in the production of photosensitive wet film for PCB includes a kettle body, a rotating shaft, stirring blades and a motor. The rotating shaft is arranged in the kettle body, and the upper end of the rotating shaft extends out of the kettle body and is connected to the motor. The stirring blades are installed in the kettle body at the middle and lower ends of the rotating shaft. During the stirring process, the heat generated by the electric rotation is easily transferred to the material in the kettle body through the rotating shaft, so that the temperature of the material in the kettle body continues to rise. When the temperature of the material is too high, the epoxy resin will produce a cross-linking reaction, and the photosensitizer will fail, thereby affecting the product quality. Summary of the invention

[0004] The invention provides a mixing preheating tank for preparing a photosensitive wet film for a printed circuit board, which solves the problems raised by the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a mixing preheating tank for preparing a photosensitive wet film for a printed circuit board, comprising an outer shell, a cover plate fixedly mounted on the top of the outer shell, a feeding port opened on the top outer wall of the cover plate, a stirring assembly fixedly mounted on the top of the cover plate, a driving assembly fixedly mounted on the top of the stirring assembly, a discharging assembly fixedly mounted on the outer wall of the outer shell, and a humidifying assembly fixedly mounted on the inner edge of the cover plate.

[0006] As a preferred technical solution of the present invention: the stirring assembly includes a fixed plate, a mounting groove is provided on the top of the fixed plate, a bearing gear and a gear body are fixedly installed on the outer wall of the center bottom of the fixed plate, a rotating plate is rotatably sleeved on the outer wall at the top center of the fixed plate, a supporting bin is fixedly installed on the bottom of the rotating plate, two groups of rubber water bags are fixedly installed on the top of the rotating plate, the inner wall of the supporting bin is rotatably connected to a stirring frame, the rubber water bag is fixedly installed with a connecting pipe at the bottom of the stirring frame, and a circulation groove is provided on the outer wall of the rotating plate near the stirring frame.

[0007] As a preferred technical solution of the present invention: the inner ring of the bearing gear is fixedly assembled with the fixed plate, the outer ring gear of the bearing gear is rotatably connected with the inner ring, and the outer ring gear of the bearing gear is fixedly assembled with the rotating plate;

[0008] There are two groups of stirring racks, and the two groups of stirring racks are symmetrically arranged.

[0009] As a preferred technical solution of the present invention: the stirring frame includes a connecting shaft, the outer wall of the connecting shaft is fixedly equipped with a bearing 1, the bottom outer ring of the bearing 1 is fixedly equipped with a support plate, the top of the connecting shaft is provided with a driven wheel, the bottom of the connecting shaft is fixedly equipped with a tripod, and the three outer ends of the tripod are fixedly equipped with stirring blades.

[0010] As a preferred technical solution of the present invention: a retractor is fixedly mounted on the top of the driven wheel, a circular groove 1 is formed on the outer wall of the driven wheel close to the connecting shaft, a circular groove 2 is formed at a position corresponding to the connecting shaft and the circular groove 1, and a clamping ring is fixedly mounted on the outer wall of the connecting shaft;

[0011] The connecting shaft is rotatably connected with the driven wheel through a retaining ring, the telescopic end of the telescope corresponds to the position of circular groove 1, the support plate and the bottom outer wall of the support bin are fixedly assembled, the stirring frame is rotatably connected with the support bin through bearing 1, and the driven wheel is meshed with the gear body.

[0012] As a preferred technical solution of the present invention: an inlet groove is provided on the top of the connecting shaft, an outlet groove is provided in the inner cavity of the connecting shaft, a one-way valve is embedded in the inner cavity of the inlet groove, the tripod is connected to the inner cavity of the stirring blade, the tripod is connected to the inlet groove and the outlet groove respectively, the outlet grooves at the first group of the connecting shafts are connected to the second group of rubber water bags through the circulation grooves, and the outlet grooves at the second group of the connecting shafts are connected to the first group of rubber water bags through the circulation grooves;

[0013] The inlet groove is communicated with the rubber water bag through a connecting pipe.

[0014] As a preferred technical solution of the present invention: the driving assembly includes a motor, a connector is fixedly mounted on the bottom power output shaft of the motor, a driving wheel is fixedly mounted on the power output shaft of the connector, and a film-covered board is fixedly mounted on the bottom of the driving wheel;

[0015] The film-covering plate is located on the top of the rubber water bag.

[0016] As a preferred technical solution of the present invention: the discharging assembly includes a fixing frame, the inner wall of one end of the fixing frame away from the shell is rotatably connected with a telescopic rod, the telescopic end of the telescopic rod is rotated to one end of the push plate, the other end of the push plate is fixedly equipped with a connecting shaft, the bottom outer wall of the connecting shaft is rotatably connected with a sleeve, the outer wall of the sleeve close to the shell is fixedly equipped with a connecting plate, and the bottom of the connecting shaft is fixedly equipped with a sealing plate;

[0017] The bottom of the shell is provided with a flow outlet matched with the shape of the sealing plate, and the connecting plate and the fixing frame are both fixedly assembled with the outer wall of the shell.

[0018] As a preferred technical solution of the present invention: the humidifying assembly includes a connecting water pipe, the bottom of the connecting water pipe is fixedly equipped with an annular pipe, and the outer wall of the annular pipe close to the axis of the shell is annularly fixedly equipped with a plurality of atomizing nozzles;

[0019] The connecting water pipe is communicated with the atomizing nozzle through an annular pipe, and the annular pipe is fixedly assembled with the top outer wall of the shell.

[0020] The present invention has the following beneficial effects:

[0021] 1. The photosensitive wet film for printed circuit boards is used to prepare a mixing preheating tank. The rotating plate is driven to rotate by a driving component, and is fixed by a gear body and a fixed plate. The stirring frame is driven to rotate by the rotating plate and a supporting bin. The driven wheel and the gear body are meshed, and the operation is performed through a telescope. The telescopic end of the telescope is located on the inner wall of the circular groove 1 and the circular groove 2, and the driven wheel and the connecting shaft are connected by the telescope. Then, the stirring frame is rotated through the gear body, and two groups of stirring frames are used to rotate around the gear body, so that the two groups of stirring frames rotate in the same direction, so that the photosensitive wet films located at adjacent positions of the two groups of stirring frames can achieve a high shear force stirring effect, thereby increasing the bonding toughness of the photosensitive wet films, and completing the mixing process in a shorter time.

[0022] When the driven wheel and the connecting shaft are not connected by the telescopic device, the rotating plate and the supporting bin can drive the two sets of stirring racks to rotate, while the stirring rack body does not rotate, so that the stirring rack can stir the photosensitive wet film in one direction, thereby reducing the generation of shear force.

[0023] By changing the connection state of the driven wheel and the connecting shaft, the device can realize different stirring methods, thereby enabling the device to realize selective stirring according to the stirring state of the photosensitive wet film.

[0024] 2. The photosensitive wet film for the printed circuit board is used to prepare the mixing preheating tank. The motor drives the driving wheel to rotate through the connector, so that the film-covered plate is located on the top of the rubber water bag and moves, thereby squeezing the rubber water bag, so that the water in the inner cavity of the rubber water bag flows to the inner cavity of the stirring frame through the connecting pipe, and the water in the inner cavity of the stirring frame flows to the inner cavity of another rubber water bag through the outlet groove, thereby realizing the cooling of the stirring frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the humidification component of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the discharging assembly of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the stirring assembly of the present invention;

[0029] Figure 5 This is a schematic diagram of the main structure of the gear of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the stirring frame of the present invention;

[0031] Figure 7 For the present invention Figure 6 A schematic diagram of the structure enlargement in the middle;

[0032] Figure 8 This is a schematic diagram of the support warehouse structure of the present invention;

[0033] Fig. 9 This is a schematic diagram of the cross-sectional structure of the connecting shaft of the present invention;

[0034] Fig.10 For the present invention Figure 8 Enlarged schematic diagram of the structure at point B in the middle.

[0035] In the figure: 1. Shell; 2. Cover plate; 3. Feeding port; 4. Stirring component; 5. Driving component; 6. Discharging component; 7. Humidifying component;

[0036] 401, fixed plate; 402, mounting groove; 403, bearing gear; 404, gear body; 405, rotating plate; 406, supporting bin; 407, rubber water bag; 408, stirring frame; 409, connecting pipe; 410, circulation tank;

[0037] 4081, connecting shaft; 4082, bearing; 4083, support plate; 4084, driven wheel; 4085, tripod; 4086, stirring blade; 4087, telescopic device; 4088, circular groove 1; 4089, snap ring; 40810, circular groove 2; 40811, inlet groove; 40812, outlet groove;

[0038] 501, motor; 502, connector; 503, driving wheel; 504, laminated board;

[0039] 601, fixed frame; 602, telescopic rod; 603, push plate; 604, sleeve; 605, connecting plate; 606, sealing plate; 607, connecting shaft;

[0040] 701, water connecting pipe; 702, annular pipe; 703, atomizing nozzle. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figure 1-Figure 10 A mixing preheating tank for preparing photosensitive wet film for printed circuit boards comprises a shell 1, a cover plate 2 is fixedly mounted on the top of the shell 1, a feeding port 3 is opened on the top outer wall of the cover plate 2, a stirring component 4 is fixedly mounted on the top of the cover plate 2, a driving component 5 is fixedly mounted on the top of the stirring component 4, a discharging component 6 is fixedly mounted on the outer wall of the shell 1, and a humidifying component 7 is fixedly mounted on the inner edge of the cover plate 2.

[0043] In a preferred embodiment: the stirring assembly 4 includes a fixed plate 401, a mounting groove 402 is provided on the top of the fixed plate 401, a bearing gear 403 and a gear body 404 are fixedly installed on the outer wall at the center of the top of the fixed plate 401, a rotating plate 405 is rotatably sleeved on the outer wall, a supporting bin 406 is fixedly installed on the bottom of the rotating plate 405, two groups of rubber water bags 407 are fixedly installed on the top of the rotating plate 405, a stirring frame 408 is rotatably connected to the inner wall of the supporting bin 406, the rubber water bag 407 is located at the bottom of the stirring frame 408 and is fixedly installed with a connecting pipe 409, and a circulation groove 410 is provided on the outer wall of the rotating plate 405 near the stirring frame 408.

[0044] In a preferred embodiment: the inner ring of the bearing gear 403 is fixedly assembled with the fixed plate 401, the outer ring gear of the bearing gear 403 is rotatably connected with the inner ring, and the outer ring gear of the bearing gear 403 is fixedly assembled with the rotating plate 405;

[0045] There are two groups of stirring racks 408, and the two groups of stirring racks 408 are symmetrically arranged.

[0046] In the above structure, the drive component 5 is fixed by opening a mounting groove 402, and the drive component 5 and the bearing gear 403 are meshed, and the inner ring of the bearing gear 403 and the fixed plate 401 are fixedly assembled, the outer ring gear ring and the inner ring of the bearing gear 403 are rotatably connected, and the outer ring gear ring of the bearing gear 403 and the rotating plate 405 are fixedly assembled, so that the drive component 5 drives the rotating plate 405 to rotate.

[0047] In a preferred embodiment: the stirring frame 408 includes a connecting shaft 4081, the outer wall of the connecting shaft 4081 is fixedly equipped with a bearing 4082, the bottom outer ring of the bearing 4082 is fixedly equipped with a support plate 4083, the top of the connecting shaft 4081 is provided with a driven wheel 4084, the bottom of the connecting shaft 4081 is fixedly equipped with a tripod 4085, and the three outer ends of the tripod 4085 are all fixedly equipped with stirring blades 4086.

[0048] In a preferred embodiment: a retractor 4087 is fixedly mounted on the top of the driven wheel 4084, a circular groove 1 4088 is opened on the outer wall of the driven wheel 4084 near the connecting shaft 4081, a circular groove 2 40810 is opened at the connecting shaft 4081 corresponding to the circular groove 1 4088, and a snap ring 4089 is fixedly mounted on the outer wall of the connecting shaft 4081;

[0049] The connecting shaft 4081 is rotatably connected to the driven wheel 4084 through the retaining ring 4089, the telescopic end of the telescope 4087 corresponds to the position of the circular groove 4088, the support plate 4083 and the bottom outer wall of the support bin 406 are fixedly assembled, the stirring frame 408 is rotatably connected to the support bin 406 through the bearing 4082, and the driven wheel 4084 is meshed with the gear body 404.

[0050] In the above structure, the driving assembly 5 drives the rotating plate 405 to rotate, and the gear body 404 and the fixed plate 401 are used to fix it. The rotating plate 405 and the supporting bin 406 drive the stirring frame 408 to rotate, and the driven wheel 4084 and the gear body 404 are meshed, and the telescopic device 4087 is operated, so that the telescopic end of the telescopic device 4087 is located on the inner wall of the circular groove 1 4088 and the circular groove 2 40810, so that the driven wheel 4084 and the connecting shaft 4081 are clamped through the telescopic device 4087, so that the stirring frame 408 is rotated through the gear body 404, and the two groups of stirring frames 408 are used to rotate around the gear body 404, so that the two groups of stirring frames 408 are rotated in the same direction, so that the photosensitive wet film located at the adjacent position of the two groups of stirring frames 408 can achieve a high shear force stirring effect, so that the bonding toughness of the photosensitive wet film is increased, and the mixing process is completed in a shorter time;

[0051] When the driven wheel 4084 and the connecting shaft 4081 are not connected by the telescopic device 4087, the rotating plate 405 and the supporting bin 406 can drive the two sets of stirring frames 408 to rotate, while the main body of the stirring frame 408 does not rotate, thereby enabling the stirring frame 408 to stir the photosensitive wet film in one direction and reduce the generation of shear force.

[0052] In a preferred embodiment: an inlet groove 40811 is provided on the top of the connecting shaft 4081, an outlet groove 40812 is provided in the inner cavity of the connecting shaft 4081, a one-way valve is embedded in the inner cavity of the inlet groove 40811, the tripod 4085 is connected to the inner cavity of the stirring blade 4086, the tripod 4085 is connected to the inlet groove 40811 and the outlet groove 40812 respectively, the outlet groove 40812 at the first group of connecting shafts 4081 is connected to the second group of rubber water bags 407 through the circulation groove 410, and the outlet groove 40812 at the second group of connecting shafts 4081 is connected to the first group of rubber water bags 407 through the circulation groove 410;

[0053] The inlet groove 40811 is connected to the rubber water bag 407 through the connecting pipe 409 .

[0054] In the above structure, a one-way valve is embedded in the inner cavity of the inlet groove 40811, so that the liquid in the inner cavity of the inlet groove 40811 can only flow in one direction, and is connected through the inner cavity of the tripod 4085 and the stirring blade 4086. The tripod 4085 is connected to the inlet groove 40811 and the outlet groove 40812 respectively, and the outlet groove 40812 at the first group of connecting shafts 4081 is connected to the second group of rubber water bags 407, and the outlet groove 40812 at the second group of connecting shafts 4081 is connected to the first group of rubber water bags 407, so that the water in the inner cavities of the two groups of stirring frames 408 can circulate with the water in the inner cavity of the rubber water bags 407, thereby realizing the cooling of the stirring frame 408.

[0055] In a preferred embodiment: the driving assembly 5 includes a motor 501, a connector 502 is fixedly mounted on the bottom power output shaft of the motor 501, a driving wheel 503 is fixedly mounted on the power output shaft of the connector 502, and a film-covered plate 504 is fixedly mounted on the bottom of the driving wheel 503;

[0056] The film covering plate 504 is located on the top of the rubber water bag 407 .

[0057] In the above structure, the motor 501 drives the driving wheel 503 to rotate through the connector 502, and the driving wheel 503 is engaged with the bearing gear 403 to rotate the rotating plate 405, thereby moving the rubber water bag 407 located under the film-covering plate 504, and then moving the film-covering plate 504 located on the top of the rubber water bag 407, thereby squeezing the rubber water bag 407, so that the water in the inner cavity of the rubber water bag 407 flows to the inner cavity of the stirring frame 408 through the connecting pipe 409, and the water in the inner cavity of the stirring frame 408 flows to the inner cavity of another rubber water bag 407 through the outlet groove 40812.

[0058] In a preferred embodiment: the discharging assembly 6 includes a fixing frame 601, the inner wall of one end of the fixing frame 601 away from the housing 1 is rotatably connected to a telescopic rod 602, the telescopic end of the telescopic rod 602 is rotated to one end of a push plate 603, the other end of the push plate 603 is fixedly equipped with a connecting shaft 607, the bottom outer wall of the connecting shaft 607 is rotatably connected to a sleeve 604, the outer wall of the sleeve 604 on one side close to the housing 1 is fixedly equipped with a connecting plate 605, and the bottom of the connecting shaft 607 is fixedly equipped with a sealing plate 606;

[0059] The bottom of the housing 1 is provided with a flow outlet that matches the shape of the sealing plate 606 , and the connecting plate 605 and the fixing frame 601 are both fixedly assembled with the outer wall of the housing 1 .

[0060] In the above structure, the push plate 603 is moved by the telescopic end of the telescopic rod 602, so that the push plate 603 rotates around the connecting shaft 607, thereby driving the sealing plate 606 to rotate, so as to achieve sealing or opening of the housing 1.

[0061] In a preferred embodiment: the humidifying assembly 7 includes a connecting water pipe 701, a ring-shaped pipe 702 is fixedly installed at the bottom of the connecting water pipe 701, and a plurality of atomizing nozzles 703 are fixedly installed in a ring shape on the outer wall of the ring-shaped pipe 702 close to the axis of the housing 1;

[0062] The connecting water pipe 701 is connected to the atomizing nozzle 703 through the annular pipe 702 , and the annular pipe 702 is fixedly assembled with the top outer wall of the housing 1 .

[0063] In the above structure, the humidifying component 7 is used to add liquid to the inner cavity of the housing 1 .

[0064] Working principle: the driving assembly 5 drives the rotating plate 405 to rotate, which is fixed by the gear body 404 and the fixed plate 401, and the rotating plate 405 and the supporting bin 406 drive the stirring frame 408 to rotate, and the telescopic device 4087 is operated to make the driven wheel 4084 and the connecting shaft 4081 realize the clamping connection through the telescopic device 4087, so that the stirring frame 408 can realize the rotation through the gear body 404, so that the photosensitive wet film located at the adjacent position of the two groups of stirring frames 408 can realize the stirring effect of high shear force;

[0065] When the driven wheel 4084 and the connecting shaft 4081 are not connected by the telescopic device 4087, the rotating plate 405 and the supporting chamber 406 can drive the two sets of stirring racks 408 to rotate, while the stirring rack 408 body does not rotate, so that the stirring rack 408 can stir the photosensitive wet film in one direction, thereby reducing the generation of shear force;

[0066] The motor 501 drives the driving wheel 503 to rotate through the connector 502, so that the film-covering plate 504 is moved on the top of the rubber water bag 407, thereby squeezing the rubber water bag 407, so that the water in the inner cavity of the rubber water bag 407 flows to the inner cavity of the stirring frame 408 through the connecting pipe 409, and the water in the inner cavity of the stirring frame 408 flows to the inner cavity of another rubber water bag 407 through the outlet groove 40812, thereby cooling the stirring frame 408.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0068] 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 preheating tank for preparing a photosensitive wet film for a printed circuit board, comprising a housing (1), Features: A cover plate (2) is fixedly mounted on the top of the housing (1); a feeding port (3) is provided on the top outer wall of the cover plate (2); a stirring assembly (4) is fixedly mounted on the top of the cover plate (2); a driving assembly (5) is fixedly mounted on the top of the stirring assembly (4); a discharging assembly (6) is fixedly mounted on the outer wall of the housing (1); and a humidifying assembly (7) is fixedly mounted on the inner edge of the cover plate (2); The stirring assembly (4) comprises a fixed plate (401), a mounting groove (402) is provided at the top of the fixed plate (401), a bearing gear (403) and a gear body (404) are fixedly mounted on the outer wall at the center bottom of the fixed plate (401), a rotating plate (405) is rotatably sleeved on the outer wall at the center of the top of the fixed plate (401), a supporting bin (406) is fixedly mounted at the bottom of the rotating plate (405), two groups of rubber water bags (407) are fixedly mounted on the top of the rotating plate (405), a stirring frame (408) is rotatably connected to the inner wall of the supporting bin (406), a connecting pipe (409) is fixedly mounted at the bottom of the rubber water bag (407) located at the stirring frame (408), and a circulation groove (410) is provided on the outer wall of the rotating plate (405) near the stirring frame (408); The driving assembly (5) comprises a motor (501), a connector (502) is fixedly mounted on the bottom power output shaft of the motor (501), a driving wheel (503) is fixedly mounted on the power output shaft of the connector (502), and a film-covered plate (504) is fixedly mounted on the bottom of the driving wheel (503); The film-covering plate (504) is located on the top of the rubber water bag (407); the inner ring of the bearing gear (403) and the fixed plate (401) are fixedly assembled, the outer ring gear of the bearing gear (403) and the inner ring are rotatably connected, and the outer ring gear of the bearing gear (403) and the rotating plate (405) are fixedly assembled; The stirring racks (408) are provided in two groups, and the two groups of stirring racks (408) are symmetrically arranged; the driving wheel (503) is meshed with the bearing gear (403); The stirring frame (408) comprises a connecting shaft (4081), the outer wall of the connecting shaft (4081) is fixedly equipped with a bearing 1 (4082), the bottom outer ring of the bearing 1 (4082) is fixedly equipped with a support plate (4083), the top of the connecting shaft (4081) is provided with a driven wheel (4084), the bottom of the connecting shaft (4081) is fixedly equipped with a tripod (4085), and the three outer ends of the tripod (4085) are all fixedly equipped with stirring blades (4086); A retractor (4087) is fixedly mounted on the top of the driven wheel (4084); a circular groove 1 (4088) is provided on the outer wall of the driven wheel (4084) on the side close to the connecting shaft (4081); a circular groove 2 (40810) is provided at a position corresponding to the connecting shaft (4081) and the circular groove 1 (4088); and a snap ring (4089) is fixedly mounted on the outer wall of the connecting shaft (4081); The connecting shaft (4081) is rotatably sleeved with the driven wheel (4084) via a snap ring (4089), the telescopic end of the telescope (4087) corresponds to the position of the circular groove 1 (4088), the support plate (4083) is fixedly assembled with the bottom outer wall of the support bin (406), the stirring frame (408) is rotatably connected with the support bin (406) via a bearing 1 (4082), and the driven wheel (4084) is meshed with the gear body (404); An inlet groove (40811) is provided at the top of the connecting shaft (4081), an outlet groove (40812) is provided in the inner cavity of the connecting shaft (4081), a one-way valve is embedded in the inner cavity of the inlet groove (40811), the inner cavity of the tripod (4085) and the inner cavity of the stirring blade (4086) are connected, the tripod (4085) is connected to the inlet groove (40811) and the outlet groove (40812) respectively, the outlet groove (40812) at the first group of the connecting shafts (4081) is connected to the second group of rubber water bags (407) through the circulation groove (410), and the outlet groove (40812) at the second group of the connecting shafts (4081) is connected to the first group of rubber water bags (407) through the circulation groove (410); The inlet groove (40811) is connected to the rubber water bag (407) via a connecting pipe (409).

2. A preheating tank for preparing a photosensitive wet film for a printed circuit board according to claim 1, Features: The discharging assembly (6) comprises a fixing frame (601), the inner wall of one end of the fixing frame (601) away from the outer shell (1) is rotatably connected to a telescopic rod (602), the telescopic end of the telescopic rod (602) is rotatably connected to one end of a push plate (603), the other end of the push plate (603) is fixedly equipped with a connecting shaft (607), the bottom outer wall of the connecting shaft (607) is rotatably connected to a sleeve (604), the outer wall of the sleeve (604) on one side close to the outer shell (1) is fixedly equipped with a connecting plate (605), and the bottom of the connecting shaft (607) is fixedly equipped with a sealing plate (606); The bottom of the housing (1) is provided with a flow outlet that matches the shape of the sealing plate (606), and the connecting plate (605) and the fixing frame (601) are both fixedly assembled with the outer wall of the housing (1).

3. A preheating tank for preparing a photosensitive wet film for a printed circuit board according to claim 1, Features: The humidifying assembly (7) comprises a connecting water pipe (701), a ring-shaped pipe (702) is fixedly mounted on the bottom of the connecting water pipe (701), and a plurality of atomizing nozzles (703) are fixedly mounted in a ring-shaped manner on the outer wall of the ring-shaped pipe (702) close to the axis of the housing (1); The connecting water pipe (701) is connected to the atomizing nozzle (703) via the annular pipe (702), and the annular pipe (702) is fixedly assembled to the top outer wall of the housing (1).

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