Drying device for silica gel production

Abstract

The utility model belongs to the technical field of silica gel production, and particularly relates to a drying device for silica gel production, which comprises a support frame, a drying box rotatably mounted in the support frame, a drying cavity formed in the drying box, a stirring rod, a filter screen and a collecting box sequentially arranged in the drying cavity from top to bottom, and a sealing cover arranged at the top of the drying box. A motor is fixedly installed at the top of the sealing cover, the output end of the motor penetrates through the sealing cover and is coaxially connected with the stirring rod, and handles are fixedly installed at the top of the sealing cover and located on the two sides of the motor; the fixing assembly is located on the drying box and used for fixing the sealing cover; the driving assembly is located in the supporting frame and used for driving the drying box to rotate; according to the silica gel drying device, a worker can conveniently discharge dried silica gel in the drying cavity, operation is easy, a large amount of working time can be saved, and the hands of the worker cannot be scalded by the dried silica gel.

Description

Technical Field

[0001] This utility model belongs to the field of silicone production technology, and in particular relates to a drying device for silicone production. Background Technology

[0002] Silica gel is a highly active adsorbent material, belonging to the amorphous substance category. It is generally a colorless, transparent, or milky-white granular or blocky solid. It has low hardness, is elastic, and feels similar to rubber. Silica gel exhibits good thermal stability, maintaining its physical and chemical properties essentially unchanged over a wide temperature range (generally from -40℃ to around 230℃), allowing it to be used in various environmental conditions.

[0003] For example, Chinese patent CN216011547U discloses a drying device for silicone production, including support legs, with an organic body fixedly connected to the top of the support legs. First partitions are fixedly connected to the left and right sides of the organic body near the bottom, and a second partition is fixedly connected to the top left side of the first partitions. A leak-proof mechanism is provided at the top of the organic body, a discharge port is fixedly connected to the right side of the organic body near the bottom, a dust collection mechanism is provided on the bottom left side of the organic body, a stirring mechanism is provided in the middle of the bottom of the organic body, and a heating mechanism is provided at the back of the organic body. When the silicone needs to be dried, this drying device uses a hot air blower. The hot air blower guides heated air through a distributor pipe into a connecting pipe, and then through an air outlet pipe into the organic body, thus heating and drying the silicone inside the organic body. The motor, when running, stirs the silicone inside the organic body, ensuring more even heating.

[0004] The aforementioned patent has the following problems:

[0005] The existing patent has some drawbacks in its use. For example, after drying the silicone, the device requires manual removal of the dried silicone bit by bit, which is cumbersome and time-consuming. Furthermore, the freshly dried silicone can easily burn workers' hands during the unloading process, posing a safety hazard. Therefore, we propose a drying device for silicone production. Summary of the Invention

[0006] The purpose of this invention is to provide a drying apparatus for silica gel production, so as to solve the problems mentioned in the background art.

[0007] In view of this, the present invention provides a drying apparatus for silica gel production, comprising:

[0008] A support frame is provided, in which a drying box is rotatably installed. The drying box has a drying chamber, and inside the drying chamber, from top to bottom, there are a stirring rod, a filter screen, and a collection box. The top of the drying box is provided with a sealing cover, and a motor is fixedly installed on the top of the sealing cover. The output end of the motor passes through the sealing cover and is coaxially connected to the stirring rod. Handles are fixedly installed on the top of the sealing cover and on both sides of the motor.

[0009] A fixing assembly, located on the drying oven, is used to secure the sealing cover;

[0010] A drive assembly, located within a support frame, is used to drive the drying oven to rotate;

[0011] An air trough is formed inside the drying chamber and located on the periphery of the drying cavity. Several nozzles are fixedly installed on the inner wall of the drying cavity. A hot air blower is fixedly installed on the periphery of the drying chamber. An air inlet pipe is fixedly installed at the air outlet of the hot air blower. One end of the air inlet pipe passes through the periphery of the drying chamber and is connected to the air trough.

[0012] In this technical solution, during use, the operator can release the sealing cover by using the fixing component. Then, the operator can hold the two handles and remove the stirring rod and sealing cover. The silica gel to be dried is then placed into the drying chamber. The sealing cover is then placed back on the top of the drying chamber and fixed by the fixing component.

[0013] Then, personnel can start the hot air blower, which draws in outside air, heats it, and delivers it into the air inlet pipe. The hot air from the air inlet pipe then enters the air tank, and the hot air from the air tank is blown into the drying chamber through several nozzles to dry the silica gel inside. At the same time, the motor can be started, and the motor's output shaft will drive the stirring rod to rotate. The rotation of the stirring rod can stir the silica gel in the drying chamber, thereby ensuring that the silica gel dries more thoroughly. During the stirring process, smaller silica gel particles will pass through the filter screen and enter the collection box, making it easier for personnel to classify and collect the fine silica gel, thus improving the quality of the silica gel.

[0014] After the silica gel is dried, the sealing cap and stirring rod can be removed by the above operation. Then, the drying chamber can be rotated by the drive component, so that all the dried silica gel in the drying chamber can be poured out at once. This ensures that the dried silica gel in the drying chamber can be easily discharged by the personnel. The operation is simple, saves a lot of working time, and the dried silica gel will not burn the personnel's hands.

[0015] In the above technical solution, the fixing component further includes:

[0016] Two rotating slots are provided, both of which are located on the top of the drying oven. A threaded rod is rotatably installed in each rotating slot. The top end of the threaded rod passes through the sealing cover. A threaded sleeve is threadedly installed on the threaded rod and located on top of the sealing cover. A rubber pad is fixedly installed at the bottom of the threaded sleeve.

[0017] In this technical solution, during use, the operator can first rotate the two threaded sleeves. Under the action of the threads, the threaded sleeves will move upward on the threaded rods. Then, the operator can rotate the threaded rods to remove the two threaded rods from the sealing cover. At this time, the two threaded sleeves can release the sealing cover from its restraint. Then, the operator can hold the two handles and remove the stirring rod and the sealing cover. Next, the silica gel to be dried is placed into the drying chamber. Then, the sealing cover is put back on the top of the drying chamber. The two threaded rods are rotated again, so that the two threaded rods are locked on the sealing cover. Then, the two threaded sleeves are rotated. Under the action of the threads, the threaded sleeves will move downward on the threaded rods until the rubber pad at the bottom of the threaded sleeves abuts against the top of the sealing cover. At this time, the sealing cover can be fixed.

[0018] In the above technical solution, the threaded rod is further engaged with the sealing cover, and the bottom of the rubber pad abuts against the top of the sealing cover.

[0019] In this technical solution, it is ensured that the threaded rod can be locked inside the sealing cover, and that the rubber gasket can fix the sealing cover.

[0020] In the above technical solution, the driving component further includes:

[0021] A rectangular groove is formed within a support frame and located on one side of the drying oven. A worm gear is fixedly installed on the rotating shaft of the drying oven within the rectangular groove. A worm is meshed with the bottom of the worm gear within the rectangular groove. A groove is formed within the support frame and on one side of the rectangular groove. A bevel gear one is rotatably installed within the groove. One end of the bevel gear one passes through one side of the groove and is coaxially connected to the worm. A bevel gear two is meshed with one side of the bevel gear one within the groove. One end of the bevel gear two passes through the groove, extends to the outside, and is fixedly fitted with a handle.

[0022] In this technical solution, rotating the handle causes the second bevel gear to rotate. Under the action of meshing, the rotation of the second bevel gear causes the first bevel gear to rotate. The rotation of the first bevel gear causes the worm to rotate. Under the action of meshing, the rotation of the worm causes the worm wheel to rotate. The rotation of the worm wheel causes the drying chamber to rotate, thereby allowing all the dried silica gel in the drying chamber to be poured out at once. This ensures that it is easy for personnel to discharge the dried silica gel from the drying chamber. The operation is simple, saves a lot of working time, and the dried silica gel will not burn the personnel's hands.

[0023] In the above technical solution, the worm gear is rotatably connected to the rectangular groove, the worm is rotatably connected to the rectangular groove, and the second bevel gear is rotatably connected to the groove.

[0024] In this technical solution, it is ensured that the worm gear can rotate normally in the rectangular groove, the worm can rotate normally in the rectangular groove, and the bevel gear can rotate normally in the groove.

[0025] In the above technical solution, the stirring rod is rotatably connected to the drying chamber, the filter screen is fixedly connected to the inner wall of the drying chamber, the collection box is inserted into the drying chamber, and the output shaft of the motor is rotatably connected to the sealing cover.

[0026] In this technical solution, it is ensured that the stirring rod can rotate normally in the drying chamber, the filter screen structure is stable, the collection box can be pulled out, and the motor output shaft can rotate normally in the sealed cover.

[0027] In the above technical solution, the nozzle is further connected to the air tank, and one end of the air inlet pipe is tightly welded to the drying box.

[0028] In this technical solution, it is ensured that the hot air in the air tank can be ejected through the nozzle, thus ensuring the structural stability of the air inlet pipe.

[0029] The beneficial effects of this utility model are:

[0030] This drying device for silicone production, through the coordinated operation of the fixed components, drive components, sealing cover, and drying chamber, ensures that personnel can easily discharge the dried silicone from the drying chamber. It is simple to operate, saves a lot of working time, and the dried silicone will not burn the personnel's hands. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a detailed internal structural diagram of the drying oven in this utility model;

[0033] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0034] Figure 4 This is a cross-sectional structural diagram of the support frame in this utility model;

[0035] Figure 5 This utility model Figure 4 Enlarged structural diagram at point B;

[0036] Figure 6This is a cross-sectional structural diagram of the drying oven in this utility model.

[0037] The markings in the diagram are as follows:

[0038] 1. Support frame; 2. Drying chamber; 3. Filter screen; 4. Stirring rod; 5. Sealing cover; 6. Motor; 7. Collection box; 8. Handle; 9. Rotating groove; 10. Threaded rod; 11. Threaded sleeve; 12. Rubber pad; 13. Rectangular groove; 14. Worm gear; 15. Worm; 16. Groove; 17. Bevel gear one; 18. Bevel gear two; 19. Rotating handle; 20. Nozzle; 21. Air trough; 22. Hot air blower; 23. Air inlet pipe; 24. Drying box. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0040] Example 1:

[0041] Please see Figure 1 - Figure 6 As shown, this embodiment provides a drying apparatus for silica gel production, comprising:

[0042] A support frame 1 is provided, and a drying box 24 is rotatably installed inside the support frame 1. A drying chamber 2 is opened inside the drying box 24. A stirring rod 4, a filter screen 3, and a collection box 7 are arranged in sequence from top to bottom inside the drying chamber 2. A sealing cover 5 is provided on the top of the drying box 24. A motor 6 is fixedly installed on the top of the sealing cover 5. The output end of the motor 6 passes through the sealing cover 5 and is coaxially connected to the stirring rod 4. Handles 8 are fixedly installed on the top of the sealing cover 5 and on both sides of the motor 6.

[0043] A fixing component is located on the drying oven 24 and is used to fix the sealing cover 5.

[0044] The drive assembly is located inside the support frame 1 and is used to drive the drying oven 24 to rotate;

[0045] Air trough 21 is located inside the drying chamber 24 and on the periphery of the drying cavity 2. Several nozzles 20 are fixedly installed on the inner wall of the drying cavity 2. A hot air blower 22 is fixedly installed on the periphery of the drying chamber 24. An air inlet pipe 23 is fixedly installed at the air outlet of the hot air blower 22. One end of the air inlet pipe 23 passes through the periphery of the drying chamber 24 and is connected to the air trough 21.

[0046] In use, the operator can release the sealing cover 5 by using the fixing component. Then, the operator can hold the two handles 8 and take out the stirring rod 4 and the sealing cover 5. Then, put the silica gel to be dried into the drying chamber 2, and then put the sealing cover 5 back on the top of the drying box 24. Finally, the operator can fix the sealing cover 5 by using the fixing component.

[0047] Subsequently, personnel can start the hot air blower 22, which draws in outside air, heats it, and delivers it to the air inlet pipe 23. The hot air in the air inlet pipe 23 then enters the air tank 21, and the hot air in the air tank 21 is blown into the drying chamber 2 through several nozzles 20 to dry the silica gel in the drying chamber 2. At the same time, the motor 6 can be started, and the output shaft of the motor 6 will drive the stirring rod 4 to rotate. The rotation of the stirring rod 4 can stir the silica gel in the drying chamber 2, so that the silica gel in the drying chamber 2 can be dried more thoroughly. During the stirring process, smaller silica gel particles will pass through the filter screen 3 and enter the collection box 7, which makes it easier for personnel to classify and collect the fine silica gel, thereby improving the quality of the silica gel.

[0048] After the silica gel is dried, the personnel can remove the sealing cover 5 and the stirring rod 4 through the above operation. Then, the drying chamber 24 is rotated by the drive component, so that all the dried silica gel in the drying chamber 2 can be poured out at once. This ensures that the personnel can easily discharge the dried silica gel in the drying chamber 2. The operation is simple and can save a lot of working time. The dried silica gel will not burn the personnel's hands.

[0049] Example 2:

[0050] This embodiment provides a drying apparatus for silica gel production. In addition to the technical solutions described in the above embodiments, it also has the following technical features, including a fixing component:

[0051] Two rotating slots 9 are located on the top of the drying oven 24. A threaded rod 10 is rotatably installed in the rotating slot 9. The top end of the threaded rod 10 passes through the sealing cover 5. A threaded sleeve 11 is threadedly installed on the threaded rod 10 and located on the top of the sealing cover 5. A rubber pad 12 is fixedly installed at the bottom of the threaded sleeve 11.

[0052] In operation, the operator can first rotate the two threaded sleeves 11. Under the action of the threads, the threaded sleeves 11 will move upward on the threaded rod 10. Then, the operator can rotate the threaded rod 10 to remove the two threaded rods 10 from the sealing cover 5. At this time, the two threaded sleeves 11 can release the sealing cover 5 from its restraint. Then, the operator can hold the two handles 8 and remove the stirring rod 4 and the sealing cover 5. Then, put the silica gel to be dried into the drying chamber 2. Then, put the sealing cover 5 back on the top of the drying box 24. Then rotate the two threaded rods 10 so that the two threaded rods 10 are locked on the sealing cover 5. Then rotate the two threaded sleeves 11. Under the action of the threads, the threaded sleeves 11 will move downward on the threaded rod 10 until the rubber pad 12 at the bottom of the threaded sleeve 11 abuts against the top of the sealing cover 5. At this time, the sealing cover 5 can be fixed.

[0053] Example 3:

[0054] This embodiment provides a drying device for silica gel production. In addition to the technical solutions of the above embodiments, it also has the following technical features: the threaded rod 10 is engaged with the sealing cover 5, and the bottom of the rubber pad 12 abuts against the top of the sealing cover 5.

[0055] Specifically, this ensures that the threaded rod 10 can be locked inside the sealing cover 5, and that the rubber gasket 12 can fix the sealing cover 5.

[0056] Example 4:

[0057] This embodiment provides a drying apparatus for silica gel production. In addition to the technical solutions described in the above embodiments, it also has the following technical features, including a driving component comprising:

[0058] A rectangular groove 13 is formed inside the support frame 1 and located on one side of the drying oven 24. A worm gear 14 is fixedly installed on the rotating shaft of the drying oven 24 and inside the rectangular groove 13. A worm 15 is meshed at the bottom of the worm gear 14 and inside the rectangular groove 13. A groove 16 is formed inside the support frame 1 and on one side of the rectangular groove 13. A bevel gear 17 is rotatably installed in the groove 16. One end of the bevel gear 17 passes through one side of the groove 16 and is coaxially connected to the worm 15. A bevel gear 18 is meshed on one side of the bevel gear 17 and inside the groove 16. One end of the bevel gear 18 passes through the groove 16 and extends to the outside and is fixedly installed with a handle 19.

[0059] Rotating the handle 19 causes the second bevel gear 18 to rotate. Under meshing action, the second bevel gear 18 rotates, which in turn drives the first bevel gear 17 to rotate. The first bevel gear 17 rotates, which in turn drives the worm gear 15 to rotate. Under meshing action, the worm gear 15 rotates, which in turn drives the worm wheel 14 to rotate. The worm wheel 14 rotates, which in turn drives the drying chamber 24 to rotate. This allows all the dried silica gel in the drying chamber 2 to be poured out at once, ensuring that it is easy for personnel to discharge the dried silica gel from the drying chamber 2. The operation is simple, saves a lot of working time, and the dried silica gel will not burn the personnel's hands.

[0060] Example 5:

[0061] This embodiment provides a drying device for silica gel production. In addition to the technical solutions of the above embodiments, it also has the following technical features: the worm gear 14 is rotatably connected to the rectangular groove 13, the worm 15 is rotatably connected to the rectangular groove 13, and the bevel gear 18 is rotatably connected to the groove 16.

[0062] Specifically, it ensures that the worm gear 14 can rotate normally within the rectangular groove 13, that the worm 15 can rotate normally within the rectangular groove 13, and that the bevel gear 18 can rotate normally within the groove 16.

[0063] Example 6:

[0064] This embodiment provides a drying device for silica gel production. In addition to the technical solutions of the above embodiments, it also has the following technical features: the stirring rod 4 is rotatably connected to the drying chamber 2, the filter screen 3 is fixedly connected to the inner wall of the drying chamber 2, the collection box 7 is inserted into the drying chamber 2, and the output shaft of the motor 6 is rotatably connected to the sealing cover 5.

[0065] Among these measures, it is ensured that the stirring rod 4 can rotate normally in the drying chamber 2, the filter screen 3 is structurally stable, the collection box 7 can be pulled out, and the output shaft of the motor 6 can rotate normally in the sealing cover 5.

[0066] Example 7:

[0067] This embodiment provides a drying device for silicone production. In addition to the technical solutions of the above embodiments, it also has the following technical features: the nozzle 20 is connected to the air tank 21, and one end of the air inlet pipe 23 is tightly welded to the drying box 24.

[0068] This ensures that the hot air in the air tank 21 can be ejected through the nozzle 20, thus ensuring the structural stability of the air inlet pipe 23.

[0069] It is worth noting that, since the rotation of the worm gear 15 drives the rotation of the worm wheel 14, which has a self-locking property, and the silica gel is relatively light, it ensures that the drying oven 24 will not rotate under the influence of gravity when it is rotating.

[0070] Working principle: When in use, the operator can first rotate the two threaded sleeves 11. Under the action of the threads, the threaded sleeves 11 will move upward on the threaded rod 10. Then, the operator can rotate the threaded rod 10 to turn the two threaded rods 10 out of the sealing cover 5. At this time, the two threaded sleeves 11 can release the sealing cover 5 from its limit. Then, the operator can hold the two handles 8 and take out the stirring rod 4 and the sealing cover 5. Then, put the silica gel to be dried into the drying chamber 2. Then, put the sealing cover 5 back on the top of the drying box 24. Then rotate the two threaded rods 10 so that the two threaded rods 10 are locked on the sealing cover 5. Then rotate the two threaded sleeves 11. Under the action of the threads, the threaded sleeves 11 will move downward on the threaded rod 10 until the rubber pad 12 at the bottom of the threaded sleeve 11 abuts against the top of the sealing cover 5. At this time, the sealing cover 5 can be fixed.

[0071] Subsequently, personnel can start the hot air blower 22, which draws in outside air, heats it, and delivers it to the air inlet pipe 23. The hot air in the air inlet pipe 23 then enters the air tank 21, and the hot air in the air tank 21 is blown into the drying chamber 2 through several nozzles 20 to dry the silica gel in the drying chamber 2. At the same time, the motor 6 can be started, and the output shaft of the motor 6 will drive the stirring rod 4 to rotate. The rotation of the stirring rod 4 can stir the silica gel in the drying chamber 2, so that the silica gel in the drying chamber 2 can be dried more thoroughly. During the stirring process, smaller silica gel particles will pass through the filter screen 3 and enter the collection box 7, which makes it easier for personnel to classify and collect the fine silica gel, thereby improving the quality of the silica gel.

[0072] After the silica gel is dried, the sealing cap 5 and stirring rod 4 can be removed using the above-described operation. Then, the handle 19 is rotated. The rotation of the handle 19 will drive the second bevel gear 18 to rotate. Under the action of meshing, the rotation of the second bevel gear 18 will drive the first bevel gear 17 to rotate. The rotation of the first bevel gear 17 will drive the worm gear 15 to rotate. Under the action of meshing, the rotation of the worm gear 15 will drive the worm wheel 14 to rotate. The rotation of the worm wheel 14 will drive the drying chamber 24 to rotate, thereby allowing all the dried silica gel in the drying chamber 2 to be poured out at once. This ensures that it is easy for personnel to discharge the dried silica gel in the drying chamber 2. The operation is simple, saves a lot of working time, and the dried silica gel will not burn the personnel's hands.

[0073] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A drying apparatus for silica gel production, characterized in that, include: A support frame (1) is provided, in which a drying box (24) is rotatably installed. A drying chamber (2) is provided inside the drying box (2). A stirring rod (4), a filter screen (3), and a collection box (7) are arranged in the drying chamber (2) from top to bottom. A sealing cover (5) is provided on the top of the drying box (24). A motor (6) is fixedly installed on the top of the sealing cover (5). The output end of the motor (6) passes through the sealing cover (5) and is coaxially connected with the stirring rod (4). A handle (8) is fixedly installed on the top of the sealing cover (5) and on both sides of the motor (6). A fixing assembly is located on the drying oven (24) and is used to fix the sealing cover (5); A drive assembly located within the support frame (1) and used to drive the drying oven (24) to rotate; An air trough (21) is provided inside the drying chamber (24) and located on the periphery of the drying cavity (2). Several nozzles (20) are fixedly installed on the inner wall of the drying cavity (2). A hot air blower (22) is fixedly installed on the periphery of the drying chamber (24). An air inlet pipe (23) is fixedly installed at the air outlet of the hot air blower (22). One end of the air inlet pipe (23) passes through the periphery of the drying chamber (24) and is connected to the air trough (21).

2. The drying apparatus for silica gel production according to claim 1, characterized in that, The fixing component includes: Two rotating slots (9) are provided on the top of the drying oven (24). A threaded rod (10) is rotatably installed in the rotating slot (9). The top end of the threaded rod (10) passes through the sealing cover (5). A threaded sleeve (11) is threadedly installed on the threaded rod (10) and located on the top of the sealing cover (5). A rubber pad (12) is fixedly installed at the bottom of the threaded sleeve (11).

3. A drying apparatus for silica gel production according to claim 2, characterized in that, The threaded rod (10) engages with the sealing cap (5), and the bottom of the rubber pad (12) rests against the top of the sealing cap (5).

4. A drying apparatus for silica gel production according to claim 1, characterized in that, The driving component includes: A rectangular groove (13) is formed inside the support frame (1) and located on one side of the drying chamber (24). A worm gear (14) is fixedly installed on the rotating shaft of the drying chamber (24) and inside the rectangular groove (13). A worm (15) is meshed at the bottom of the worm gear (14) and inside the rectangular groove (13). A groove (16) is formed inside the support frame (1) and on one side of the rectangular groove (13). A bevel gear one (17) is rotatably installed in the groove (16). One end of the bevel gear one (17) passes through one side of the groove (16) and is coaxially connected with the worm (15). A bevel gear two (18) is meshed on one side of the bevel gear one (17) and inside the groove (16). One end of the bevel gear two (18) passes through the groove (16) and extends to the outside and is fixedly installed with a handle (19).

5. A drying apparatus for silica gel production according to claim 4, characterized in that, The worm gear (14) is rotatably connected to the rectangular groove (13), the worm (15) is rotatably connected to the rectangular groove (13), and the bevel gear (18) is rotatably connected to the groove (16).

6. A drying apparatus for silica gel production according to claim 1, characterized in that, The stirring rod (4) is rotatably connected to the drying chamber (2), the filter screen (3) is fixedly connected to the inner wall of the drying chamber (2), the collection box (7) is inserted into the drying chamber (2), and the output shaft of the motor (6) is rotatably connected to the sealing cover (5).

7. A drying apparatus for silica gel production according to claim 1, characterized in that, The nozzle (20) is connected to the air tank (21), and one end of the air inlet pipe (23) is tightly welded to the drying box (24).

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