Spraying device for forming metalized film screen belt

Abstract

The invention discloses a spraying device for forming a metallized film screen belt. The spraying device comprises an oil storage tank, a heating tank, a gas storage tank and a liquefaction tank, an oil pump is installed in the oil storage tank, and a discharge outlet of the oil pump is connected with an oil pipe. A semiconductor chilling plate is embedded in the heating tank; an air nozzle is formed in the upper surface of the air storage tank, a sealing plate used for sealing the air nozzle is arranged in the air storage tank in a sliding mode, and an electric push rod used for pushing the sealing plate to slide is fixed to the air storage tank; a booster pump is mounted at the communicating port; the liquefying box is fixed at the bottom of the heating tank; the independent heating tank and the gas storage tank are arranged, the pressure intensity of oil gas in the gas storage tank is conveniently controlled through the booster pump, the electric push rod is controlled to push the sealing plate to slide, opening and closing of the gas spraying opening are achieved, the problem that a coating at the bright spot position of the metallized coating starting position falls off is solved, and the coating quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of metallized film processing, and in particular relates to a spraying device for forming a metallized film screen strip. Background Art

[0002] At present, metallized film is formed by vapor-depositing aluminum and zinc on the surface of BOPP film or BOPET film to form a metal coating. According to the width of the metal coating required by the user, a blank margin with a certain width is reserved on one side of the metal coating, which is called a screen strip. The blank margin area must be clear and without coating, and the connection between the blank margin area and the metal coating is clear, and there must be no unclear buffer zone. In production, oil shielding is usually adopted, that is, before the film is evaporated, a layer of oil film is sprayed on the corresponding blank margin area in advance to prevent metal adhesion during evaporation.

[0003] This type of spraying equipment for spraying shielding oil vapor onto the film surface is usually a horizontal cylindrical oil tank with a built-in electric heater. A notch is opened in the spraying area on the top of the oil tank. A sealing baffle is fixed on the upper end of the notch. The baffle is provided with nozzles for spraying oil vapor onto the film surface along the length direction. Each nozzle corresponds to a screen strip with a blank margin on the film. The oil in the oil tank is heated to form oil vapor, which is sprayed to the corresponding area on the film surface through the nozzle on the baffle;

[0004] The above-mentioned prior art solutions have the following defects: since the oil in the oil tank must be heated in the early stage of the preparation work for evaporating the metallized film, the volatilized oil vapor after heating will inevitably overflow from the nozzle of the baffle, polluting the surface of the film, resulting in oil contamination points at the beginning of the metallized film, and during the spraying process, dust in the air will be adsorbed and attached to the surface of the metallized film, causing the coating to fall off easily, affecting the product quality; and the airflow sprayed from the nozzle is affected by the electric heater, and the oil vapor generated fluctuates, resulting in unstable air pressure, affecting the coating effect. Summary of the invention

[0005] The present invention aims to solve the problems of unstable spraying in the prior art, which leads to easy shedding of the coating and poor coating quality, and proposes the following technical solutions:

[0006] A spraying device for forming a metallized film screen strip, comprising: an oil storage tank, a heating tank, a gas storage tank and a liquefied tank;

[0007] An oil pump is installed in the oil storage tank, and an oil pipe is connected to the discharge port of the oil pump; a semiconductor refrigeration sheet is embedded in the heating tank, and the heating surface of the semiconductor refrigeration sheet is arranged in the heating tank, and one end of the oil pipe extends into the heating tank;

[0008] The upper surface of the air storage box is provided with an air jet port, a sealing plate for sealing the air jet port is slidably arranged in the air storage box, and an electric push rod for pushing the sealing plate to slide is fixed to the air storage box; the heating tank is fixed to the bottom of the air storage box, and a connecting port is arranged at the top of the heating tank and the bottom of the air storage box, and a booster pump is installed at the connecting port;

[0009] The liquefaction box is fixed at the bottom of the heating tank, the cooling surface of the semiconductor refrigeration plate is arranged in the liquefaction box, the liquefaction box is connected with an air inlet pipe and an air outlet pipe, a cover body is arranged on the top of the air storage box, the air jet is arranged in the cover body, and inlet and outlet channels are respectively opened on both sides of the cover body. A circulating pump is installed on one side of the air storage box, the air suction end of the circulating pump is connected to the cover body, the exhaust end of the circulating pump is connected to the air inlet pipe, and one end of the air outlet pipe is connected to the cover body.

[0010] As a preferred embodiment of the above technical solution, the oil storage tank is provided with an oil filling port, a plug is threadedly connected to the oil filling port, a pressure balance port is installed on the top of the oil storage tank, and a liquid level gauge is installed on the side wall of the oil storage tank. The oil filling port is provided for adding oil to the oil storage tank to ensure that there is enough oil, and the oil storage tank and the heating tank are independently arranged so that the efficiency of heating and generating oil and gas in the heating tank will not be affected during the refueling process.

[0011] As a preferred embodiment of the above technical solution, the heating tank is provided with heat dissipation fins, the heat dissipation fins are immersed in the oil, and the bottom of the heat dissipation fins is attached to the heating surface of the semiconductor refrigeration plate. The heat dissipation fins are provided to quickly diffuse the heat generated by the heating surface of the semiconductor refrigeration plate into the oil, so as to achieve a rapid heating effect, and the oil is evenly heated as a whole through diffusion.

[0012] As a preferred embodiment of the above technical solution, air pressure sensors are installed in the heating tank and the air storage box respectively, and an electric control valve is installed at the connecting port between the bottom of the air storage box and the heating tank. The pressure sensors are arranged to monitor the air pressure in the heating tank and the air storage box respectively to ensure that the oil and gas output is stable within the specified range.

[0013] As a preferred embodiment of the above technical solution, a refueling port is provided on one side of the heating tank, a one-way valve is installed on the refueling port, and the upper end of the oil pipe is connected to the one-way valve. The one-way valve is provided to ensure that the oil in the oil storage tank can smoothly enter the heating tank through the oil pipe, and the internal pressure of the heating tank increases during the heating process, and the oil gas will not diffuse into the oil storage tank.

[0014] As a preferred embodiment of the above technical solution, a plurality of the jet ports are provided, and the plurality of the jet ports are arranged at equal intervals. The jet ports are round holes or square holes, and a transparent cover plate is sealed on the top of the cover body; the number of the jet ports is set according to actual needs to meet processing requirements. The jet ports are round holes, which are convenient for opening internal threads and installing nozzles of different shapes; the jet ports are square holes, which are convenient for controlling the air output by sliding the sealing plate without affecting the spraying width.

[0015] The bottom of the liquefied tank is provided with a drain port, and the drain port is provided with a valve. The drain port is provided at the bottom of the liquefied tank for draining the oil accumulated inside, and the oil recovery operation is conveniently performed by setting the opening and closing of the valve.

[0016] As a preferred embodiment of the above technical solution, a detachable baffle is fixedly connected to the top of the gas storage box by threads, the air jet is opened on the surface of the detachable baffle, and a sealing gasket is arranged between the upper end of the gas storage box and the detachable baffle. The baffle is detachably fixed to the top of the gas storage box, which is convenient for disassembly and replacement, meets the needs of cleaning and maintenance, and reduces maintenance costs.

[0017] As a preferred embodiment of the above technical solution, a sliding rod is fixed in the air storage box, a sliding sleeve is slidably connected to the surface of the sliding rod, the sliding sleeve is fixedly connected to the sealing plate, the electric push rod is fixed to the outside of the air storage box, the movable end of the electric push rod slides through the air storage box and is connected to the sealing plate, and a guiding effect is played on the sealing plate by adding a sliding rod and cooperating with the sliding sleeve, and a cover structure is provided to reduce the friction force of the sliding of the sealing plate, reduce wear, and extend the service life.

[0018] As a preferred embodiment of the above technical solution, the cover body is rectangular, and an air inlet and an air outlet are respectively opened diagonally on the cover body. The inlet and outlet channels are arranged between the inlet and the outlet, and the horizontal height of the inlet and outlet channels is lower than the height of the inlet and the outlet; the air suction end of the circulation pump is connected to the outlet, and one end of the outlet pipe is connected to the inlet. The inlet pipe and the outlet pipe are arranged at the upper end of the metallized film, and only the space gathered at the top of the cover body is circulated with air flow, which will not affect the spraying process between the bottom of the metallized film and the air jet. The inlet pipe and the outlet pipe are arranged diagonally to increase the overall circulation effect of the airflow in the cover body.

[0019] As a preferred embodiment of the above technical solution, a support frame is further included, the upper end of the support frame is connected to the air storage box, the oil storage tank is fixed on one side of the support frame, and the oil pipe is a telescopic hose.

[0020] As a preferred embodiment of the above technical solution, the support frame includes a support rod and a rod sleeve, the support rod is slidably inserted into the lower end of the rod sleeve, and the support rod is fixed with an electric push rod for pushing the rod sleeve to slide. The overall height of the air storage box can be adjusted by controlling the electric push rod, which is convenient for application according to site requirements during actual operation.

[0021] As a preferred embodiment of the above technical solution, a base is fixed to the lower end of the support rod, a mounting hole is opened on the surface of the base, the fixed end of the electric push rod is fixed to the support rod, the movable end of the electric push rod is fixed to the rod sleeve, and the rod sleeve is arranged parallel to the support rod.

[0022] As a preferred embodiment of the above technical solution, the upper end of the support frame is hinged to the bottom of the gas storage box through a hinge seat, the oil storage tank is arranged obliquely below the heating tank, and a corner of the oil storage tank and a corner of the heating tank are respectively provided with chamfers that fit each other. Since the gas storage box is long and occupies a large space, the upper end of the support frame is connected to the gas storage box in a hinged manner, which is convenient for rotation and folding, so that the overall equipment occupies a small space and is easy to transport. At the same time, during maintenance, it is folded and erected to expose most of the structure, which is convenient for maintenance operations.

[0023] As a preferred embodiment of the above technical solution, the outer wall of the oil storage tank is provided with a first clip, the side wall of the heating tank is provided with a first slot, and the first clip is engaged with the first slot; the bottom of the gas storage box is provided with a second clip, the outer wall of the rod sleeve is provided with a second slot, and the second clip is engaged with the second slot. By setting the first clip to engage with the first slot, the gas storage box is kept in a horizontal state, which is convenient for processing and operation; by rotating the gas storage box around the hinge seat, the second clip is engaged with the second slot, and the vertical state is locked, which is convenient for transportation and maintenance.

[0024] The beneficial effects of the present invention are:

[0025] 1. The cover is set to effectively isolate the impurities in the external air from adhering to the surface of the metallized film, keep the spraying surface clean, and improve the spraying effect. Through the operation of the circulating pump, the gas inside the cover and the liquefied tank form a cycle, reducing the interaction between the airflow inside the cover and the outside, and further reducing the external dust from entering the cover through the inlet and outlet channels. The circulating airflow not only takes away the excess oil and gas floating in the cover, but also cools the metallized film in the cover, so that the oil attached to the surface dries faster. The oil and gas are liquefied by the low temperature environment through the liquefied tank and accumulate at the bottom, which is convenient for recycling;

[0026] 2. By setting up independent heating tanks and gas storage tanks, heating and oil and gas are separated. The booster pump is used to control the oil and gas pressure in the gas storage tank. By controlling the electric push rod to push the sealing plate to slide, the air jet is opened and closed. The time for spraying oil vapor onto the film surface can be accurately controlled, thereby eliminating the problem of coating shedding at the bright spot at the beginning of the metallized coating and improving the coating quality.

[0027] 3. The booster pump draws the vaporized oil and gas in the heating tank into the air storage box, so that the air pressure in the air storage box is maintained at a constant level, ensuring that the jet nozzle sprays stable oil and gas, so that the oil film sprayed on the surface of the metallized film is uniform; the device uses semiconductor refrigeration sheets to fully utilize both cooling and heating, thereby improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 What is shown is a schematic diagram of the three-dimensional structure of a spraying device for forming a metallized thin film screen strip in an embodiment;

[0029] Figure 2 Shown is an exploded view of an embodiment;

[0030] Figure 3 What is shown is a side view of the structure of the embodiment;

[0031] Figure 4 What is shown is a schematic diagram of the three-dimensional structure of the gas storage box in a horizontal state in the embodiment;

[0032] Figure 5 The figure shows a three-dimensional structure schematic diagram of the gas storage box in an upright state in the embodiment;

[0033] 1. The oil tank is provided with a plurality of air intake ports, a plurality of air intake ports and a plurality of air intake ports. The plurality of air intake ports are provided with a plurality of air intake ports, a plurality of air intake ports and a plurality of air intake ports. The plurality of air intake ports are provided with a plurality of air intake ports, a plurality of air intake ports and a plurality of air intake ports. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0035] Example

[0036] Figure 1-Figure 5 As a specific embodiment of the present invention, a spraying device for forming a metallized thin film screen strip is shown, comprising: an oil storage tank 100, a heating tank 200, an air storage tank 300 and a liquefaction tank 400;

[0037] An oil pump 110 is installed in the oil storage tank 100, and an oil pipe 120 is connected to the discharge port of the oil pump 110; a semiconductor cooling sheet 210 is embedded in the heating tank 200, and the heating surface of the semiconductor cooling sheet 210 is arranged in the heating tank 200, and one end of the oil pipe 120 extends into the heating tank 200;

[0038] An air jet 301 is provided on the upper surface of the air storage box 300, a sealing plate 310 for sealing the air jet 301 is slidably provided inside the air storage box 300, and an electric push rod 320 for pushing the sealing plate 310 to slide is fixed to the air storage box 300; the heating tank 200 is fixed to the bottom of the air storage box 300, a connecting port is provided between the top of the heating tank 200 and the bottom of the air storage box 300, and a booster pump 330 is installed at the connecting port;

[0039] The liquefaction tank 400 is fixed at the bottom of the heating tank 200, the cooling surface of the semiconductor refrigeration plate 210 is arranged in the liquefaction tank 400, the liquefaction tank 400 is connected with an air inlet pipe 410 and an air outlet pipe 420, a cover body 340 is arranged on the top of the air storage box 300, the jet port 301 is arranged in the cover body 340, and inlet and outlet channels 341 are respectively opened on both sides of the cover body 340, and a circulation pump 350 is installed on one side of the air storage box 300, the air suction end of the circulation pump 350 is connected to the cover body 340, the exhaust end of the circulation pump 350 is connected to the air inlet pipe 410, and one end of the air outlet pipe 420 is connected to the cover body 340.

[0040] A contact switch is provided in 300. When the sealing plate 310 slides to close the air jet port 301, the normally closed contact of the contact switch is pushed to open, so that the booster pump 330 is powered off and stops working, thereby improving the linkage performance of the equipment operation.

[0041] Figure 2 As a specific embodiment of the present invention, the oil storage tank 100 is provided with an oil filling port 101, a plug is threadedly connected to the oil filling port 101, a pressure balance port 103 is installed on the top of the oil storage tank 100, and a liquid level gauge 105 is installed on the side wall of the oil storage tank 100. The oil filling port 101 is provided for adding oil to the oil storage tank 100 to ensure sufficient oil, and the oil storage tank 100 and the heating tank 200 are independently arranged, so that the efficiency of heating and generating oil and gas in the heating tank 200 will not be affected during the refueling process.

[0042] As a specific embodiment of the present invention, a heat sink is provided in the heating tank 200, the heat sink is immersed in the oil, and the bottom of the heat sink is attached to the heating surface of the semiconductor refrigeration plate 210. The heat sink is used to quickly diffuse the heat generated by the heating surface of the semiconductor refrigeration plate 210 into the oil, so as to achieve a rapid heating effect, and the oil is evenly heated as a whole through diffusion.

[0043] As a specific embodiment of the present invention, air pressure sensors are installed in the heating tank 200 and the air storage tank 300, respectively, and an electric control valve is installed at the bottom of the air storage tank 300 and the connecting port of the heating tank 200. The pressure sensors are provided to monitor the air pressure in the heating tank 200 and the air storage tank 300, respectively, to ensure that the oil and gas output is stable within the specified range.

[0044] As a specific embodiment of the present invention, a refueling port is provided on one side of the heating tank 200, a one-way valve 220 is installed on the refueling port, and the upper end of the oil pipe 120 is connected to the one-way valve 220. The one-way valve 220 is provided to ensure that the oil in the oil storage tank 100 smoothly enters the heating tank 200 through the oil pipe 120, and the internal pressure of the heating tank 200 increases during the heating process, and the oil gas will not diffuse into the oil storage tank 100.

[0045] Figure 1-Figure 2 As shown in a specific embodiment of the present invention, a plurality of air jets 301 are provided, and the plurality of air jets 301 are arranged at equal intervals. The air jets 301 are round holes or square holes, and a transparent cover plate is provided for sealing at the top of the cover body 340. The number of air jets 301 is set according to actual needs to meet processing requirements. The air jets 301 are round holes, which are convenient for opening internal threads and installing nozzles of different shapes. The air jets 301 are square holes, which are convenient for sliding and controlling the gas output through the sealing plate 310 without affecting the spraying width.

[0046] A drain port is provided at the bottom of the liquefied tank 400, and a valve 430 is installed at the drain port. The drain port is provided at the bottom of the liquefied tank 400 to guide the oil accumulated inside, and the oil recovery operation is conveniently performed by setting the opening and closing of the valve 430.

[0047] Figure 2 As a specific embodiment of the present invention, a removable baffle 303 is fixedly connected to the top of the air storage box 300 by screw threads, an air jet 301 is provided on the surface of the removable baffle 303, and a sealing gasket is provided between the upper end of the air storage box 300 and the removable baffle 303. The baffle 303 is fixed to the top of the air storage box 300 in a removable manner, which is convenient for disassembly and replacement, meets the needs of cleaning and maintenance, and reduces maintenance costs.

[0048] Figure 2What is shown is a specific embodiment of the present invention, in which a sliding rod 360 is fixed in the air storage box 300, and a sliding sleeve 361 is slidably connected to the surface of the sliding rod 360, and the sliding sleeve 361 is fixedly connected to the sealing plate 310. The electric push rod 320 is fixed to the outside of the air storage box 300, and the movable end of the electric push rod 320 slides through the air storage box 300 and is connected to the sealing plate 310. By adding the sliding rod 360 and cooperating with the sliding sleeve 361, the sealing plate 310 is guided, and a cover structure is provided to reduce the friction of the sliding of the sealing plate 310, reduce wear, and extend the service life.

[0049] As a specific embodiment of the present invention, the cover body 340 is rectangular, and the cover body 340 is provided with an air inlet and an air outlet at the diagonals, respectively. The inlet and outlet channels 341 are arranged between the air inlet and the air outlet, and the horizontal height of the inlet and outlet channels 341 is lower than the height of the air inlet and the air outlet; the air extraction end of the circulation pump 350 is connected to the air outlet, and one end of the air outlet pipe 420 is connected to the air inlet. The air inlet and outlet of the air inlet pipe 410 and the air outlet pipe 420 are arranged at the upper end of the metallized film, and only the airflow gathered in the top space of the cover body 340 is circulated, which will not affect the spraying process between the bottom of the metallized film and the air jet 301. The air inlet pipe 410 and the air outlet pipe 420 are arranged diagonally to increase the overall circulation effect of the airflow in the cover body 340.

[0050] Figure 3-Figure 5 As a specific embodiment of the present invention, it also includes a support frame 500, the upper end of the support frame 500 is connected to the air storage box 300, the oil storage tank 100 is fixed on one side of the support frame 500, and the oil pipe 120 is a telescopic hose.

[0051] Figure 3 As a specific embodiment of the present invention, the support frame 500 includes a support rod 510 and a rod sleeve 530. The support rod 510 is slidably inserted at the lower end of the rod sleeve 530. The support rod 510 is fixed with an electric push rod 540 for pushing the rod sleeve 530 to slide. The overall height of the air storage box 300 is adjusted by controlling the electric push rod 540, which is convenient for application according to the needs of the site during actual operation.

[0052] As a specific embodiment of the present invention, a base 520 is fixed at the lower end of the support rod 510, a mounting hole is opened on the surface of the base 520, the fixed end of the electric push rod 540 is fixed to the support rod 510, the movable end of the electric push rod 540 is fixed to the rod sleeve 530, and the rod sleeve 530 is arranged parallel to the support rod 510.

[0053] Figure 5As a specific embodiment of the present invention, the upper end of the support frame 500 is hinged to the bottom of the gas storage box 300 through a hinge seat 501, the oil storage tank 100 is arranged obliquely below the heating tank 200, and a corner of the oil storage tank 100 and a corner of the heating tank 200 are respectively provided with chamfers that fit each other. Since the gas storage box 300 is long and occupies a large space, the upper end of the support frame 500 is connected to the gas storage box 300 in a hinged manner, which is convenient for rotation and folding, so that the overall equipment occupies a small space and is easy to transport. At the same time, during maintenance, it is folded and erected to expose most of the structure, which is convenient for maintenance operations.

[0054] As a specific embodiment of the present invention, the outer wall of the oil storage tank 100 is provided with a first clip 190, the side wall of the heating tank 200 is provided with a first clip groove, and the first clip 190 is engaged with the first clip groove; the bottom of the gas storage box 300 is provided with a second clip groove, and the outer wall of the rod sleeve 530 is provided with a second clip groove, and the second clip 390 is engaged with the second clip groove. By setting the first clip 190 to engage with the first clip groove, the gas storage box 300 is kept in a horizontal state, which is convenient for processing and operation; by rotating the gas storage box 300 around the hinge seat 501, the second clip 390 is engaged with the second clip groove, and the vertical state is locked, which is convenient for transportation and maintenance.

[0055] Working principle:

[0056] By setting up an independent heating tank 200 and an air storage box 300, heating and oil and gas are separated. The oil and gas pressure in the air storage box 300 can be easily controlled by the booster pump 330. The sealing plate 310 is pushed to slide by controlling the electric push rod 320 to realize the opening and closing of the air jet 301. The time of spraying oil vapor onto the surface of the film can be accurately controlled, thereby eliminating the problem of coating shedding at the bright spot at the beginning of the metallized coating and improving the coating quality; the booster pump 330 draws the vaporized oil and gas in the heating tank 200 into the air storage box 300, so that a constant air pressure is maintained in the air storage box 300 to ensure that the air jet 301 sprays stable oil and gas, so that the oil film sprayed on the surface of the metallized film is uniform; the device adopts a semiconductor refrigeration sheet 210 to fully utilize both refrigeration and heating, thereby improving energy utilization.

[0057] The cover body 340 is provided to effectively isolate impurities in the external air from adhering to the surface of the metallized film, so as to keep the spraying surface clean and improve the spraying effect. The circulating pump 350 works so that the gas inside the cover body 340 and the liquefied tank 400 circulate back and forth, thereby reducing the interaction between the airflow inside the cover body 340 and the external airflow, and further reducing the external dust from entering the cover body 340 through the inlet and outlet channel 341. The circulating airflow not only takes away the excess oil and gas floating in the cover body 340, but also cools down the metallized film in the cover body 340, so that the oil attached to the surface dries faster, and the oil and gas are liquefied by the low temperature environment through the liquefied tank 400 and accumulate at the bottom for easy recycling.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. A spraying device for forming a metallized thin film screen strip, characterized in that: include: An oil storage tank (100), wherein an oil pump (110) is installed in the oil storage tank (100), and an oil pipe (120) is connected to the discharge port of the oil pump (110); A heating tank (200), wherein the heating tank (200) is embedded with a semiconductor refrigeration sheet (210), a heating surface of the semiconductor refrigeration sheet (210) is arranged in the heating tank (200), and one end of the oil pipe (120) extends into the heating tank (200); An air storage box (300), wherein an air jet (301) is provided on an upper surface of the air storage box (300), a sealing plate (310) for sealing the air jet (301) is slidably arranged inside the air storage box (300), and an electric push rod (320) for pushing the sealing plate (310) to slide is fixed to the air storage box (300); the heating tank (200) is fixed to the bottom of the air storage box (300), a communication port is provided between the top of the heating tank (200) and the bottom of the air storage box (300), and a booster pump (330) is installed at the communication port; A liquefaction box (400), the liquefaction box (400) is fixed to the bottom of the heating tank (200), the cooling surface of the semiconductor refrigeration plate (210) is arranged in the liquefaction box (400), the liquefaction box (400) is connected to an air inlet pipe (410) and an air outlet pipe (420), a cover body (340) is arranged on the top of the air storage box (300), the air injection port (301) is arranged in the cover body (340), and inlet and outlet channels (341) are respectively opened on both sides of the cover body (340), a circulation pump (350) is installed on one side of the air storage box (300), the air suction end of the circulation pump (350) is connected to the cover body (340), the exhaust end of the circulation pump (350) is connected to the air inlet pipe (410), and one end of the air outlet pipe (420) is connected to the cover body (340).

2. A spraying device for forming a metallized thin film screen strip according to claim 1, characterized in that: The oil storage tank (100) is provided with an oil filling port (101), a plug is threadedly connected to the oil filling port (101), a gas pressure balance port (103) is installed on the top of the oil storage tank (100), and a liquid level meter (105) is installed on the side wall of the oil storage tank (100).

3. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: The heating tank (200) is provided with a heat dissipation fin, the heat dissipation fin is immersed in the oil, and the bottom of the heat dissipation fin is attached to the heating surface of the semiconductor refrigeration sheet (210).

4. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: Air pressure sensors are installed in the heating tank (200) and the air storage box (300), respectively, and an electric control valve is installed at the communication port between the bottom of the air storage box (300) and the heating tank (200).

5. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: A refueling port is provided on one side of the heating tank (200), a one-way valve (220) is installed on the refueling port, and the upper end of the oil pipe (120) is butt-jointed with the one-way valve (220).

6. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: A plurality of the air jets (301) are provided, and the plurality of the air jets (301) are arranged at equal intervals. The air jets (301) are round holes or square holes. A transparent cover plate is sealed on the top of the cover body (340); The bottom of the liquefaction tank (400) is provided with a liquid discharge port, and a valve (430) is installed at the liquid discharge port.

7. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: The top of the air storage box (300) is fixedly connected with a removable baffle (303) by means of threads, the air injection port (301) is provided on the surface of the removable baffle (303), and a sealing gasket is provided between the upper end of the air storage box (300) and the removable baffle (303).

8. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: A sliding rod (360) is fixed inside the air storage box (300), a sliding sleeve (361) is slidably connected to the surface of the sliding rod (360), and the sliding sleeve (361) is fixedly connected to the sealing plate (310). The electric push rod (320) is fixed outside the air storage box (300), and the movable end of the electric push rod (320) slides through the air storage box (300) and is connected to the sealing plate (310).

9. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: The cover body (340) is rectangular, and an air inlet and an air outlet are respectively opened at opposite corners of the cover body (340). The inlet and outlet channel (341) is arranged between the air inlet and the air outlet, and the horizontal height of the inlet and outlet channel (341) is lower than the height of the air inlet and the air outlet; the air suction end of the circulation pump (350) is connected to the air outlet, and one end of the air outlet pipe (420) is connected to the air inlet.

10. A spraying device for forming a metallized thin film screen strip according to claim 2, characterized in that: It also includes a support frame (500), the upper end of the support frame (500) is connected to the air storage box (300), the oil storage tank (100) is fixed on one side of the support frame (500), and the oil pipe (120) is a telescopic hose; The support frame (500) comprises a support rod (510) and a rod sleeve (530); the support rod (510) is slidably inserted into the lower end of the rod sleeve (530); and an electric push rod (540) is fixed to the support rod (510) for pushing the rod sleeve (530) to slide; A base (520) is fixed to the lower end of the support rod (510), a mounting hole is provided on the surface of the base (520), a fixed end of the electric push rod (540) is fixed to the support rod (510), a movable end of the electric push rod (540) is fixed to the rod sleeve (530), and the rod sleeve (530) is arranged parallel to the support rod (510); The upper end of the support frame (500) is hinged to the bottom of the gas storage box (300) through a hinge seat (501); the oil storage tank (100) is arranged obliquely below the heating tank (200); and a corner of the oil storage tank (100) and a corner of the heating tank (200) are respectively provided with chamfers that fit each other at the joints; The outer wall of the oil storage tank (100) is provided with a first clip (190), the side wall of the heating tank (200) is provided with a first clip groove, and the first clip (190) is engaged with the first clip groove; the bottom of the gas storage box (300) is provided with a second clip groove, the outer wall of the rod sleeve (530) is provided with a second clip groove, and the second clip (390) is engaged with the second clip groove.

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