Dehumidifying box for preparing moisture-proof circuit board

Abstract

The utility model discloses a moisture removal box for preparing a moisture-proof circuit board, which belongs to the field of circuit boards and comprises a moisture removal box and a circuit board, and the moisture removal box comprises a discharge conveying belt, a heat sealing machine, a film storage disc, a box body, a moisture removal device, a moisture removal plate, a hot air pipe, a feed conveying belt, a partition plate, a drain valve, a drain tank, a fan, a heater, water filter cotton and a filter plate. The dehumidification device comprises a lower supporting plate, a lower water drainage opening, a lower pressing rod, a lower adsorption belt, a lower baffle, an upper supporting plate, an upper water drainage opening, an upper pressing rod, an upper baffle, an upper adsorption belt, an upper belt roller, a lower belt roller and a water drainage pipeline. According to the circuit board moisture-proof device, multiple times of water absorption and dehumidification can be automatically carried out on a circuit board, water absorption and removal are carried out in time after hot air dehumidification is carried out on the circuit board every time, film covering and moisture prevention can be carried out on the circuit board after moisture removal is carried out on the circuit board, inconvenience caused by high humidity after circuit board production is prevented, and moisture-proof storage is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of circuit board, in particular, a kind of dehumidification box for damp-proof circuit board preparation. BACKGROUND

[0002] Circuit board is divided into single-sided board, double-sided board and multilayer board according to layer, single-sided board is PCB board with wire appearing in one side, double-sided board is double-sided copper-clad with wire, and can be connected by via to make the circuit between two layers, multilayer board is printed board with three or more conductive pattern layers and insulating material, and its conductive pattern is interconnected, circuit board is divided into soft board, hard board and rigid-flex board according to characteristics, but in prior art, substrate needs to be cleaned during manufacturing, which leads to moisture state during subsequent storage, thereby affecting subsequent use, traditional dehumidification device only performs simple surface dehumidification, and dehumidification effect and efficiency are low. SUMMARY

[0003] (I) technical problem to be solved

[0004] In order to overcome the shortcomings of prior art, a dehumidification box for damp-proof circuit board preparation is provided to solve the problem that, in prior art, substrate needs to be cleaned during manufacturing, which leads to moisture state during subsequent storage, thereby affecting subsequent use, traditional dehumidification device only performs simple surface dehumidification, and dehumidification effect and efficiency are low.

[0005] (II) technical scheme

[0006] The utility model discloses a kind of dehumidification boxes for damp-proof circuit board preparation, its structure includes dehumidification box and circuit board, the dehumidification box is used for the dehumidification and cladding of circuit board;

[0007] The moisture removal box comprises a discharge conveyor belt, a heat sealing machine, a film storage disc, a box body, a moisture removal device, a moisture removal plate, a hot air pipe, a feeding conveyor belt, a partition plate, a drain valve, a drain groove, a fan, a heater, water filtering cotton and a filter plate, grooves through which the circuit board passes are formed in the two sides of the box body, the discharge conveyor belt and the feeding conveyor belt are respectively arranged on the two sides of the box body, the discharge conveyor belt and the feeding conveyor belt are located below the grooves of the box body, two film storage discs are arranged on the upper and lower sides of the discharge conveyor belt, the heat sealing machine is arranged on the discharge conveyor belt, the two film storage discs are used for film covering of the circuit board at the discharge conveyor belt, the heat sealing machine is used for edge sealing and film cutting, the moisture removal plate is fixed to the top of the inner side of the box body and is used for guiding the moisture gas, a plurality of moisture removal devices are arranged in the box body, the partition plate and the filter plate are fixed to the lower side of the inner side of the box body, the filter plate is located below the partition plate, the water filtering cotton is arranged between the partition plate and the filter plate, the filter plate and the bottom of the box body form the drain groove, one end of the drain groove is communicated with the drain valve through a drain port, the fan is fixed to the top of the partition plate, the air inlet of the fan is communicated with the water filtering cotton through the partition plate, the air outlet of the fan is provided with the heater, the air outlet of the heater is connected with the hot air pipe, and the air outlet of the hot air pipe is arranged between the two moisture removal devices.

[0008] The moisture removal device comprises a lower supporting plate, a lower drain port, a lower pressing rod, a lower adsorption belt, a lower baffle, an upper supporting plate, an upper drain port, an upper pressing rod, an upper baffle, an upper adsorption belt, an upper belt roller, a lower belt roller and a drain pipeline, the lower supporting plate, the lower pressing rod, the lower baffle, the upper pressing rod, the upper baffle and the upper supporting plate are fixed in the box body, the lower supporting plate and the upper supporting plate are both concave, the bottoms of the concave grooves of the lower supporting plate and the upper supporting plate are respectively connected with one end of the drain pipeline through the lower drain port and the upper drain port, the other end of the drain pipeline is communicated with the upper side of the drain groove, the lower belt roller is arranged in the box body and located on the two sides of the lower baffle, the lower baffle and the lower belt roller are located above the lower supporting plate, the top of the lower baffle and the lower belt roller is flush with the bottom of the groove of the box body, the lower adsorption belt is arranged outside the lower baffle and the lower belt roller, the lower pressing rod is arranged between the lower baffle and the lower supporting plate, the lower pressing rod is used for extruding the lower adsorption belt, the upper belt roller is arranged on the two sides of the upper supporting plate, the bottom of the upper supporting plate and the upper belt roller is flush with the top of the groove of the box body, the upper adsorption belt is arranged outside the upper supporting plate and the upper belt roller, the upper baffle is arranged above the concave groove of the upper supporting plate, the upper pressing rod is arranged between the upper baffle and the upper supporting plate, the upper pressing rod and the upper baffle are used for extruding the upper adsorption belt, and the upper belt roller and the lower belt roller are respectively used for rotating the upper adsorption belt and the lower adsorption belt.

[0009] Further, the surface layers of the lower adsorption belt and the upper adsorption belt are both sponge layers.

[0010] Further, the distance between the lower adsorption belt and the upper adsorption belt is less than the thickness of the circuit board.

[0011] Further, the heat sealing machine comprises a tail sealing pad plate, a side sealing pad plate, a side sealing pressing plate, a tail sealing pressing plate, a lifting cutter and a machine body, the machine body is assembled on a discharging conveyor belt, the tail sealing pad plate is fixed on the lower side of the machine body adjacent to the end of the box body, the side sealing pad plates are fixed on the lower sides of the two sides of the machine body perpendicular to the tail sealing pad plate, the machine body is further provided with a side sealing pressing plate, a tail sealing pressing plate and a lifting cutter which can be lifted, the side sealing pressing plate is located above the side sealing pad plate, the tail sealing pressing plate is located above the tail sealing pad plate, and the lifting cutter is located on the side away from the box body of the tail sealing pressing plate.

[0012] Further, the heat sealing machine comprises a tail sealing pad plate, a side sealing pad plate, a side sealing pressing plate, a tail sealing pressing plate, a lifting cutter and a machine body, the machine body is assembled on a discharging conveyor belt, the tail sealing pad plate is fixed on the lower side of the machine body adjacent to the end of the box body, the side sealing pad plates are fixed on the lower sides of the two sides of the machine body perpendicular to the tail sealing pad plate, the machine body is further provided with a side sealing pressing plate, a tail sealing pressing plate and a lifting cutter which can be lifted, the side sealing pressing plate is located above the side sealing pad plate, the tail sealing pressing plate is located above the tail sealing pad plate, and the lifting cutter is located on the side away from the box body of the tail sealing pressing plate.

[0013] Further, the heat sealing machine comprises a tail sealing pad plate, a side sealing pad plate, a side sealing pressing plate, a tail sealing pressing plate, a lifting cutter and a machine body, the machine body is assembled on a discharging conveyor belt, the tail sealing pad plate is fixed on the lower side of the machine body adjacent to the end of the box body, the side sealing pad plates are fixed on the lower sides of the two sides of the machine body perpendicular to the tail sealing pad plate, the machine body is further provided with a side sealing pressing plate, a tail sealing pressing plate and a lifting cutter which can be lifted, the side sealing pressing plate is located above the side sealing pad plate, the tail sealing pressing plate is located above the tail sealing pad plate, and the lifting cutter is located on the side away from the box body of the tail sealing pressing plate.

[0014] (Three) beneficial effects

[0015] One of the above technical solutions has the following advantages or beneficial effects:

[0016] To solve the problem that the substrate needs to be cleaned during the manufacturing process of the circuit board in the prior art, which causes the circuit board to be in a humid state during subsequent storage, thereby affecting subsequent use, and the traditional moisture removal device only performs simple surface moisture removal, the moisture removal effect and efficiency are low, and the situation is relatively inconvenient, the moisture removal device provided with multiple upper and lower pressing plates is used, the hot air outlet and the hot air circulation structure between adjacent moisture removal devices are used, and the film storage disc of the discharge port and the heat sealing machine are used, so that the circuit board can be automatically subjected to multiple water absorption and moisture removal during use of the equipment, the surface water of the circuit board can be removed in time after each hot air moisture removal, the circuit board can be coated with a film after moisture removal to prevent the inconvenience caused by high humidity of the circuit board after production, and the moisture-proof storage of the circuit board is more convenient, meanwhile, the equipment uses hot air circulation drying, the water absorbed and removed can be automatically removed, the heating loss required for drying is reduced, and energy is saved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, read in conjunction with the accompanying drawings:

[0018] Figure 1 FIG. 1 is a structural schematic view of a moisture-proof circuit board preparation moisture removal box according to the present application;

[0019] Figure 2 FIG. 2 is a cross-sectional structural schematic view of a front view according to the present application;

[0020] Figure 3 For the utility model Figure 2 The amplification structure schematic view of A in the middle;

[0021] Figure 4 For the utility model Figure 2 The amplification structure schematic view of B in the middle;

[0022] Figure 5 For the utility model side view cross section structure schematic view;

[0023] In the figure: dehumidification box-1, circuit board-2, discharge conveyor belt-a, heat sealing machine-b, film storage disc-c, box body-d, dehumidification device-e, moisture discharge plate-f, hot air pipe-g, feeding conveyor belt-h, partition plate-i, drain valve-j, drain tank-k, fan-l, heater-m, filter cotton-n, filter plate-o, top pressing plate-p, pump rod-q, moisture discharge pipeline-r, tail sealing gasket plate-b1, side sealing gasket plate-b2, side sealing pressing plate-b3, tail sealing pressing plate-b4, lifting cutter-b5, machine body-b6, lower supporting plate-e1, lower drain outlet-e2, lower pressing rod-e3, lower adsorption belt-e4, lower baffle-e5, upper supporting plate-e6, upper drain outlet-e7, upper pressing rod-e8, upper baffle-e9, upper adsorption belt-e10, upper belt roller-e11, lower belt roller-e12, drain pipeline-e13. Specific implementation

[0024] The utility model makes further detailed explanation in combination with examples, but the implementation of the utility model is not limited to this.

[0025] The utility model provides a kind of dehumidification box for damp-proof circuit board preparation: its structure includes dehumidification box 1 and circuit board 2, the dehumidification box 1 is used for the dehumidification and cladding of circuit board 2;

[0026] The dehumidification box 1 includes a discharge conveyor belt a, a heat sealing machine b, a film storage tray c, a box body d, a dehumidification device e, a dehumidification plate f, a hot air duct g, a feeding conveyor belt h, a partition i, a drain valve j, a drain trough k, a fan l, a heater m, filter cotton n, and a filter plate o. The box body d has slots on both sides for the circuit board 2 to pass through. The box body d is also equipped with a discharge conveyor belt a and a feeding conveyor belt h on both sides, located below the slots in the box body d. Two film storage trays c are provided, each mounted on the side of the box body d and positioned above and below the discharge conveyor belt a. The heat sealing machine b is located on the discharge conveyor belt a. The two film storage trays c are used for coating the circuit board 2 at the discharge conveyor belt a, and the heat sealing machine b is used for sealing the edges and the film. The box body d is cut off. A desiccant plate f is fixed to the top of the inner side of the box body d. The desiccant plate f is used to guide the flow of humid gas. Multiple sets of desiccant devices e are provided. Multiple sets of desiccant devices e are evenly arranged inside the box body d. The partition plate i and the filter plate o are both fixed to the lower side of the inside of the box body d. The filter plate o is located below the partition plate i. A water-filtering cotton n is installed between the partition plate i and the filter plate o. The filter plate o and the bottom of the box body d form a drainage groove k. One end of the drainage groove k is connected to the drainage valve j through the drainage port. A fan l is fixed to the top of the partition plate i. The air inlet of the fan l passes through the partition plate i and is connected to the water-filtering cotton n. A heater m is installed at the air outlet of the fan l. A hot air pipe g is connected to the air outlet of the heater m. The air outlet of the hot air pipe g is located between the two desiccant devices e.

[0027] The dehumidification device e includes a lower support plate e1, a lower drain outlet e2, a lower pressure rod e3, a lower adsorption belt e4, a lower baffle e5, an upper support plate e6, an upper drain outlet e7, an upper pressure rod e8, an upper baffle e9, an upper adsorption belt e10, an upper roller e11, a lower roller e12, and a drainage pipe e13. The lower support plate e1, lower pressure rod e3, lower baffle e5, upper pressure rod e8, upper baffle e9, and upper support plate e6 are all fixed inside the housing d. Both the lower support plate e1 and the upper support plate e6 are U-shaped. The bottom of the grooves of the lower support plate e1 and the upper support plate e6 are connected to one end of the drainage pipe e13 through the lower drain port e2 and the upper drain port e7, respectively. The other end of the drainage pipe e13 is connected to the upper side of the drainage trough k. The lower belt roller e12 is assembled inside the housing d and is located on both sides of the lower baffle e5. Both the lower baffle e5 and the lower belt roller e12 are located above the lower support plate e1. The tops of the lower roller e12 and the lower baffle e5 are flush with the bottom of the groove of the housing d. The lower adsorption belt e4 is arranged around the outside of the lower roller e12 and the lower baffle e5. The lower pressure rod e3 is located between the lower baffle e5 and the lower support plate e1. The lower pressure rod e3 is used to squeeze the lower adsorption belt e4. The upper roller e11 is located on both sides of the upper support plate e6. The bottoms of the upper support plate e6 and the upper roller e11 are flush with the top of the groove of the housing d. The upper adsorption belt e10 is arranged around the outside of the upper support plate e6 and the upper roller e11. The upper baffle e9 is located above the groove of the upper support plate e6. The upper pressure rod e8 is located between the upper baffle e9 and the upper support plate e6. The upper pressure rod e8 and the upper baffle e9 are used to squeeze the upper adsorption belt e10. The upper roller e11 and the lower roller e12 are respectively used to drive the upper adsorption belt e10 and the lower adsorption belt e4 to rotate.

[0028] The surface layers of both the lower adsorption zone e4 and the upper adsorption zone e10 are sponge layers.

[0029] The distance between the lower adsorption band e4 and the upper adsorption band e10 is less than the thickness of the circuit board 2.

[0030] The heat sealing machine b includes a tail sealing pad b1, a side sealing pad b2, a side sealing pressure plate b3, a tail sealing pressure plate b4, a lifting cutter b5, and a machine body b6. The machine body b6 is mounted on the discharge conveyor belt a. The tail sealing pad b1 is fixed to the lower side of the machine body b6 near the end of the housing d. The side sealing pad b2 is fixed to the lower sides of the machine body b6 perpendicular to the tail sealing pad b1. The machine body b6 also has a liftable side sealing pressure plate b3, a tail sealing pressure plate b4, and a lifting cutter b5. The side sealing pressure plate b3 is located above the side sealing pad b2, the tail sealing pressure plate b4 is located above the tail sealing pad b1, and the lifting cutter b5 is located on the side of the tail sealing pressure plate b4 away from the housing d.

[0031] It also includes a top pressure plate p and a pump rod q. The top pressure plate p is located between the partition i and the filter cotton n. The pump rod q is assembled on the top of the partition i. The telescopic rod of the pump rod q passes through the partition i and is connected to the top pressure plate p.

[0032] It also includes a moisture drainage pipe r, one end of which is connected to the moisture drainage plate f, and the other end of which is connected to the bottom of the filter cotton n.

[0033] During equipment operation, the circuit board 2, after entering the housing d via the feeding conveyor belt h, is dehumidified by the lower adsorption belt e4 and upper adsorption belt e10 of the dehumidification device e, which is equipped with multiple sets of upper and lower pressure plates for adsorption. During this process, the lower roller e12 and upper roller e11 drive the lower adsorption belt e4 and upper adsorption belt e10 to rotate, causing the circuit board 2 to move forward automatically. When passing between the two sets of dehumidification devices e, it is dehumidified and dried by the hot air from the hot air pipe g. The circuit board 2 is dried and then enters the next dehumidification device e for further dehumidification. This process is repeated until it reaches the discharge conveyor belt a. The film storage tray c at the discharge conveyor belt a can store the film rolls. Combined with the heat sealing machine b, the film is sealed at the edges, so that the circuit board 2 traveling to the discharge conveyor belt a can be covered by the film. At the same time as the film is covered, the edges are sealed by the side sealing plate b3 and the tail sealing plate b4. Then, the lifting cutter b5 separates the films of different circuit boards 2, realizing the automatic dehumidification and covering of the circuit board 2. The membrane facilitates the subsequent storage of circuit board 2, preventing inconvenience caused by high humidity after circuit board 2 production. Simultaneously, when the lower adsorption belt e4 and upper adsorption belt e10 rotate to the side away from circuit board 2, they are squeezed and dehydrated by the lower pressure rod e3, lower baffle e5, upper pressure rod e, and upper baffle e9. The dehydrated water enters the grooves of the lower support plate e1 and upper support plate e6, and is discharged from the lower drain outlet e2 and upper drain outlet e7 to the drainage trough k for centralized discharge, facilitating continuous adsorption and dehumidification. Meanwhile, the humid air generated by hot air drying enters the dehumidification plate f, which is then discharged through the dehumidification pipe r to the filter cotton n. This allows the humid, high-heat gas to be filtered and transformed into low-humidity, high-heat gas, which then enters the fan l for circulation. The water adsorbed by the filter cotton n can be periodically controlled by the pump rod q to be pressed by the top pressure plate p and discharged into the drainage trough k. The equipment has a compact structure, achieving automated dehumidification, preventing high humidity during prolonged use of the dehumidification structure, and reducing heating losses required for drying, thus saving energy.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dehumidification box for preparing a moisture-proof circuit board, the structure of which includes a dehumidification box (1) and a circuit board (2), wherein the dehumidification box (1) is used for dehumidification and covering of the circuit board (2); Its features are: The dehumidification box (1) includes a discharge conveyor belt (a), a heat sealer (b), a film storage tray (c), a box body (d), a dehumidification device (e), a dehumidification plate (f), a hot air duct (g), a feed conveyor belt (h), a partition (i), a drain valve (j), a drain trough (k), a fan (l), a heater (m), filter cotton (n), and a filter plate (o). The box body (d) has slots through which the circuit board (2) passes on both sides. The box body (d) is also equipped with... The discharge conveyor belt (a) and the feed conveyor belt (h) are located below the slot of the housing (d). Two film storage trays (c) are provided, each mounted on the side of the housing (d) and positioned above and below the discharge conveyor belt (a). A heat sealing machine (b) is located on the discharge conveyor belt (a). The two film storage trays (c) are used for coating the circuit board (2) at the discharge conveyor belt (a). The heat sealing machine (b) is used for coating... The sealing and film cutting are performed. A desiccant plate (f) is fixed to the top of the inner side of the box (d). The desiccant plate (f) is used to guide the flow of humid gas. Multiple sets of desiccant devices (e) are provided, and the multiple sets of desiccant devices (e) are evenly arranged inside the box (d). The partition (i) and filter plate (o) are both fixed to the lower side of the inside of the box (d). The filter plate (o) is located below the partition (i). Filter cotton (n) is assembled between the partition (i) and the filter plate (o). A drainage trough (k) is formed at the bottom of the box (d). One end of the drainage trough (k) is connected to the drainage valve (j) through the drainage outlet. A fan (l) is fixed on the top of the partition (i). The air inlet of the fan (l) passes through the partition (i) and is connected to the filter cotton (n). A heater (m) is installed at the air outlet of the fan (l). A hot air pipe (g) is connected to the air outlet of the heater (m). The air outlet of the hot air pipe (g) is located between the two dehumidification devices (e). The dehumidification device (e) includes a lower support plate (e1), a lower drain outlet (e2), a lower pressure rod (e3), a lower adsorption belt (e4), a lower baffle (e5), an upper support plate (e6), an upper drain outlet (e7), an upper pressure rod (e8), an upper baffle (e9), an upper adsorption belt (e10), an upper belt roller (e11), a lower belt roller (e12), and a drain pipe (e13). The lower support plate (e1), lower pressure rod (e3), lower baffle (e5), upper pressure rod (e8), upper baffle (e9), and upper support plate (e6) are all... Fixed inside the housing (d), the lower support plate (e1) and upper support plate (e6) are both U-shaped. The bottom of the grooves of the lower support plate (e1) and upper support plate (e6) are connected to one end of the drainage pipe (e13) through the lower drain port (e2) and upper drain port (e7) respectively. The other end of the drainage pipe (e13) is connected to the upper side of the drainage trough (k). The lower belt roller (e12) is assembled inside the housing (d) and located on both sides of the lower baffle (e5). The lower baffle (e5) and the lower belt roller (e12) are both located on the lower support plate (e13). Above e1), the tops of the lower belt roller (e12) and the lower baffle (e5) are flush with the bottom of the slot in the housing (d). The lower adsorption belt (e4) is arranged around the outside of the lower belt roller (e12) and the lower baffle (e5). The lower pressure rod (e3) is located between the lower baffle (e5) and the lower support plate (e1), and the lower pressure rod (e3) is used to squeeze the lower adsorption belt (e4). The upper belt roller (e11) is located on both sides of the upper support plate (e6). The bottoms of the upper support plate (e6) and the upper belt roller (e11) are flush with the bottom of the housing (d). The top of the groove of the upper suction belt (e10) is flush with the upper support plate (e6) and the upper roller (e11). The upper baffle (e9) is located above the groove of the upper support plate (e6). The upper pressure rod (e8) is located between the upper baffle (e9) and the upper support plate (e6). The upper pressure rod (e8) and the upper baffle (e9) are used to squeeze the upper suction belt (e10). The upper roller (e11) and the lower roller (e12) are used to drive the upper suction belt (e10) and the lower suction belt (e4) to rotate, respectively.

2. The dehumidification box for manufacturing moisture-proof circuit boards according to claim 1, characterized in that: The surface layer of both the lower adsorption zone (e4) and the upper adsorption zone (e10) is a sponge layer.

3. The dehumidification box for manufacturing moisture-proof circuit boards according to claim 1, characterized in that: The distance between the lower adsorption band (e4) and the upper adsorption band (e10) is less than the thickness of the circuit board (2).

4. The dehumidification box for preparing moisture-proof circuit boards according to claim 1, characterized in that: The heat sealing machine (b) includes a tail sealing pad (b1), a side sealing pad (b2), a side sealing pressure plate (b3), a tail sealing pressure plate (b4), a lifting cutter (b5), and a machine body (b6). The machine body (b6) is mounted on the discharge conveyor belt (a). The tail sealing pad (b1) is fixed to the lower side of the machine body (b6) near the end of the box (d). The side sealing pads (b2) are fixed to the lower sides of the machine body (b6) perpendicular to the tail sealing pad (b1). The machine body (b6) is also provided with a liftable side sealing pressure plate (b3), a tail sealing pressure plate (b4), and a lifting cutter (b5). The side sealing pressure plate (b3) is located above the side sealing pad (b2), the tail sealing pressure plate (b4) is located above the tail sealing pad (b1), and the lifting cutter (b5) is located on the side of the tail sealing pressure plate (b4) away from the box (d).

5. A dehumidifying box for manufacturing moisture-proof circuit boards according to claim 1, characterized in that: It also includes a top pressure plate (p) and a pump rod (q). The top pressure plate (p) is located between the partition (i) and the filter cotton (n). The pump rod (q) is assembled on the top of the partition (i). The telescopic rod of the pump rod (q) passes through the partition (i) and connects to the top pressure plate (p).

6. A dehumidifying box for manufacturing moisture-proof circuit boards according to claim 1, characterized in that: It also includes a moisture drainage pipe (r), one end of which is connected to a moisture drainage plate (f), and the other end of which is connected to the bottom of a filter cotton (n).

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