Powder spraying device and powder spraying process for cup and kettle products

Abstract

The application provides a powder spraying device and a powder spraying process for cup and pot products. The powder spraying device comprises a conveying line, a plurality of powder spraying chambers, a plurality of sealing members of different sizes, and a plurality of identical product jigs. The conveying line is provided with a plurality of first positioning jigs. The powder spraying chambers are provided with powder spraying machines, which comprise mechanical arms and second positioning jigs. The plurality of sealing members of different sizes are used for sealing the mouths of cup and pot products of different sizes, and the plurality of sealing members of different sizes all have identical connecting portions so as to be connected with the identical product jigs. The first positioning jigs and the second positioning jigs have identical positioning portions so as to be connected with the identical product jigs. The powder spraying machines in each powder spraying chamber are used for spraying powder coatings of different colors. According to the application, a single powder spraying device can be flexibly and simply switched to spray cup and pot products of different sizes and different colors.

Description

Technical Field

[0001] This application relates to the field of cup and kettle manufacturing technology, and in particular to a powder coating equipment and powder coating process for cup and kettle products. Background Technology

[0002] Most cups and kettles on the market use powder coating technology in their production. Powder coating involves spraying powder coating onto the product's surface. Under electrostatic attraction, the powder coating adheres evenly to the surface, forming a powdery coating. This powdery coating is then baked at high temperature to level and solidify on the product surface. The equipment used to perform this powder coating process is called powder coating equipment.

[0003] Currently, switching between powder coating equipment for different sizes of cups and bottles requires replanning the robot's trajectory, a cumbersome process that impacts production efficiency. Furthermore, changing coating colors necessitates thorough cleaning of the powder coating machine, another tedious process that reduces efficiency. Therefore, typically, a single powder coating machine is used for only one size of cup or bottle and only one color, but this results in high equipment investment and production costs.

[0004] In view of this, how to improve the powder coating equipment to avoid some or all of the above-mentioned drawbacks of the existing powder coating equipment is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a powder coating device for cups and kettles. The powder coating device includes a conveyor line, a powder coating chamber, multiple sealing elements of different sizes, and multiple identical product fixtures. Multiple first positioning fixtures are installed on the conveyor line. A powder coating machine is arranged inside the powder coating chamber, and the powder coating machine includes a robotic arm and a second positioning fixture. The multiple sealing elements of different sizes are used to seal the mouths of cups and kettles of different sizes, and all of the multiple sealing elements of different sizes have the same connecting portion so that they can be connected to the same product fixture. The first positioning fixture and the second positioning fixture have the same positioning portion so that they can be connected to the same product fixture.

[0006] In one embodiment of a powder coating device for cups and kettles, the top of the product fixture is inserted into the connecting portion of the seal, and the bottom of the product fixture is inserted into the positioning portion of the positioning fixture. The product fixture is provided with a limiting structure to limit the insertion distance between the product fixture and the seal and the positioning fixture.

[0007] In one embodiment of a powder coating equipment for cups and kettles, the product fixture is provided with a shielding structure. When the bottom of the product fixture is inserted into the positioning part of the positioning fixture, the shielding structure blocks the top opening of the positioning fixture.

[0008] One embodiment of a powder spraying device for cups and kettles includes a product fixture with a guide structure that guides the bottom of the product fixture to quickly insert into the positioning part of a positioning fixture.

[0009] One embodiment of a powder coating equipment for cups and kettles includes a plurality of powder coating chambers, wherein the powder coating machine in each powder coating chamber is used to spray powder coatings of different colors.

[0010] One embodiment of a powder coating equipment for cups and kettles includes an operating room for operators to load and unload cups and kettles from the production line, a hot air baking room for baking cups and kettles coated with powder coating, and a cooling room for cooling the baked cups and kettles.

[0011] In one embodiment of a powder coating equipment for cups and kettles, the hot air baking chamber and the operating chamber are located on the same side of the powder coating chamber, the cooling chamber is located between the powder coating chamber, the hot air baking chamber, and the operating chamber, and the conveyor line runs from the operating chamber through the powder coating chamber, bends back to the hot air baking chamber, bends back to the cooling chamber, and then bends back to the operating chamber.

[0012] One embodiment of a powder coating equipment for cups and kettles includes a powder coating chamber, a fluidizing tank, a spray gun, a spray gun drive module, and a vacuum cleaner. A second positioning fixture is located inside the powder coating chamber. The fluidizing tank is used to fluidize the powder coating. The spray gun is connected to the fluidizing tank and is used to spray the powder coating into the powder coating chamber. The spray gun drive module is connected to the spray gun to drive the spray gun to move up and down. One side of the powder coating chamber has a first opening for the product and product fixture to pass through, and the other side of the powder coating chamber has a second opening connected to the vacuum cleaner to collect excess powder coating in the powder coating chamber.

[0013] One embodiment of the powder coating equipment for cups and kettles includes a discharge valve and a discharge motor at the bottom of the vacuum cleaner, a dust collection box connected to the outlet of the discharge valve, a discharge port in the dust collection box, and a circulation pipe connected to the fluidizing tank or the spray gun to achieve closed-loop circulation of the powder coating.

[0014] In addition, this application also provides a powder coating process for cups and kettles, implemented using the powder coating equipment described in any of the above claims, the powder coating process including the following steps.

[0015] S1. The operator in the control room performs the online operation of the cup and kettle products: connect the cup and kettle products to be sprayed with powder to the product fixture through the corresponding sealing parts, connect the product fixture to the first positioning fixture on the conveyor line, so that the cup and kettle products are positioned on the first positioning fixture with the help of the product fixture.

[0016] S2. The conveyor line transports the cups and kettles to be powdered to the target powder spraying chamber. After the cups and kettles are transported to the target powder spraying chamber, the robotic arm of the powder spraying machine in the powder spraying chamber grabs the product fixture and connects the product fixture to the second positioning fixture of the powder spraying machine, so that the cups and kettles are positioned on the second positioning fixture with the help of the product fixture.

[0017] S3. The powder spraying machine sprays powder onto the positioned cup and kettle products. After the powder spraying is completed, the robot arm of the powder spraying machine grabs the product fixture and connects the product fixture to the first positioning fixture on the conveyor line, so that the cup and kettle products are positioned on the first positioning fixture with the help of the product fixture.

[0018] S4. The conveyor line transports the powder-coated cups and kettles to the hot air baking chamber and the cooling chamber in sequence for baking and cooling, respectively.

[0019] S5. The conveyor line transports the cooled cups and kettles to the control room, where operators perform the unloading operation.

[0020] The powder coating equipment provided in this application allows for the connection of cups and kettles of different sizes to the same product fixture via corresponding seals. The robotic arm transfers the cups and kettles by gripping the product fixture. Therefore, regardless of changes in the size of the cups and kettles, the robotic arm's gripping position remains constant within the same product fixture. Consequently, when powder coating different sizes of cups and kettles, there is no need to adjust the robotic arm's gripping position, thus eliminating the need to replan its travel trajectory. Therefore, if the powder coating equipment provided in this application needs to switch between coating different sizes of cups and kettles, it is only necessary to connect the different sized cups and kettles to the product fixture connected to the first positioning fixture at a predetermined position on the conveyor line via corresponding seals. This switching is flexible, simple, and efficient.

[0021] Furthermore, the powder coating equipment provided in this application, by setting up multiple spraying chambers, eliminates the need to clean the powder coating machine when switching between spraying different colors of powder coating. Instead, it only requires adding the corresponding color of powder coating to the fluidization tank of the corresponding powder coating machine, making the switching flexible, convenient, and efficient. Attached Figure Description

[0022] Figure 1 A top view of an embodiment of the powder spraying equipment for cup and kettle products provided in this application;

[0023] Figure 2 for Figure 1A perspective view of one embodiment of a powder spraying machine inside the powder spraying chamber;

[0024] Figure 3 A three-dimensional view showing the product fixture connected to the first positioning fixture;

[0025] Figure 4 for Figure 3 The main view;

[0026] Figure 5 for Figure 4 AA view.

[0027] The annotations in the attached figures are explained as follows:

[0028] 10 conveyor lines;

[0029] 20 powder spraying chambers;

[0030] 30 Product fixture, 301 First boss, 302 Second boss, 303 Retaining ring, 304 Conical end;

[0031] 40 first positioning fixture;

[0032] 50 Powder spraying machine, 501 Robotic arm, 502 Second positioning fixture, 503 Powder spraying chamber, 504 Spray gun, 505 Spray gun drive module, 506 Vacuum cleaner, 507 Unloading valve, 508 Unloading motor, 509 Dust collection box.

[0033] 60. Control room; 70. Hot air baking room; 80. Cooling room; 90. Electrical cabinet; 100. Inspection door. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Before introducing this application, let me briefly explain why existing powder coating equipment needs to re-plan the travel trajectory of the robot arm when switching to spray different sized cups and pots, and why existing powder coating equipment needs to thoroughly clean the powder coating machine when switching to spray different colors of powder coating.

[0036] When switching between spraying different sizes of cups and kettles, existing powder coating equipment requires replanning the travel trajectory of the robot arm. This is because the existing powder coating equipment's robot arm directly grabs the cups and kettles when transferring them. Therefore, if the size of the cups and kettles changes, the grabbing position needs to be adjusted, and after the grabbing position is adjusted, the travel trajectory naturally needs to be replanned.

[0037] Existing powder coating equipment requires thorough cleaning of the powder coating machine when switching to spray different colors of powder coating. The reason is that existing powder coating equipment is equipped with a powder coating chamber. Therefore, in order to prevent color mixing, when switching to spray different colors of powder coating, it is necessary to thoroughly clean all parts of the powder coating machine in this powder coating chamber, such as the spray gun and fluidizing tank, that have been contaminated with powder coating.

[0038] The following is a detailed description of the proposal in this application.

[0039] This application provides a powder spraying device and a powder spraying process for cups and kettles.

[0040] This application does not limit the type of cup or kettle product. For example, it can be an ordinary cup or kettle without heat preservation function, or an insulated cup or kettle with heat preservation function.

[0041] like Figure 1 As shown, in this embodiment, the powder spraying equipment for cups and kettles includes a conveyor line 10, a powder spraying chamber 20, seals of different sizes (not shown), and multiple identical product fixtures 30 (see [link to product details]). Figure 3 Multiple first positioning fixtures 40 installed on the first conveyor line 10 (see) Figure 3 The powder spraying machine 50, the operating room 60, the hot air baking room 70, the cooling room 80, the electrical cabinet 90, the maintenance door 100, etc., are arranged in the powder spraying room 20.

[0042] like Figure 2 As shown, in this embodiment, the powder spraying machine 50 includes a robotic arm 501, a second positioning fixture 502, a powder spraying chamber 503, a spray gun 504, a spray gun drive module 505, a vacuum cleaner 506, a discharge valve 507, a discharge motor 508, a dust collection box 509, and a circulation pipeline (not shown).

[0043] The different sized seals are used to seal the mouths of cups and pots of different sizes.

[0044] The different sizes of the seals have the same connection part so that they can be connected to the same product fixture 30, so that different sizes of cups and kettles can be connected to the same product fixture 30 through the seals that seal their mouths.

[0045] The first positioning fixture 40 and the second positioning fixture 502 have the same positioning part so that they can be connected to the same product fixture 30. The cup and kettle products can be positioned at a predetermined position on the conveyor line 10 by the product fixture 30 and the first positioning fixture 40, and can also be positioned at a predetermined position on the powder spraying machine 50 by the product fixture 30 and the second positioning fixture 502.

[0046] The product fixture 30 is equipped with a gripping part for the robot arm 501 of the powder spraying machine 50 to grasp and transfer cup and kettle products by gripping the product fixture 30.

[0047] The powder coating equipment provided in this application allows cups and kettles of different sizes to be connected to the same product fixture 30 through corresponding seals. The robot arm 501 transfers the cups and kettles by gripping the product fixture 30. Therefore, no matter how the size of the cups and kettles changes, the gripping position of the robot arm is always the same position on the same product fixture. Thus, the gripping position of the robot arm remains unchanged. Therefore, when powder coating cups and kettles of different sizes, it is not necessary to adjust the gripping position of the robot arm, and thus there is no need to replan the stroke trajectory of the robot arm.

[0048] Therefore, if the powder coating equipment provided in this application needs to switch to coating cups and kettles of different sizes, it is only necessary to connect the cups and kettles of different sizes to the product fixture connected to the first positioning fixture at the predetermined position of the conveyor line through the corresponding sealing parts. The switching is flexible, simple and efficient.

[0049] In one embodiment, the powder spraying equipment has only one powder spraying chamber 20.

[0050] In one embodiment, such as Figure 1 As shown, the powder coating equipment is equipped with multiple powder coating chambers 20. Each powder coating chamber 20 contains a powder coating machine 50, which is used to spray different colors of powder coating. Thus, by simply selecting and activating different powder coating chambers 20, the powder coating equipment can switch between spraying different colors of powder coating. Of course, multiple powder coating chambers 20 can also be activated simultaneously, allowing the powder coating equipment to spray multiple different colors of powder coating at the same time, enabling a single powder coating machine to spray different colors of cups and jugs simultaneously. Furthermore, when switching between spraying different colors of powder coating, it is not necessary to clean the powder coating machine 50; only the corresponding color of powder coating needs to be added to the fluidization tank of the corresponding powder coating machine 50. This switching is flexible, simple, and efficient.

[0051] Figure 1 In the illustrated embodiment, since an operating room 60 is provided, operators can put the cup and kettle products on and off the production line within the operating room 60.

[0052] Figure 1 In the embodiment shown, since a hot air baking chamber 70 is provided, the cup and kettle products after powder coating can be conveyed to the hot air baking chamber 70 by the conveyor line 10 for baking, so that the powder coating adsorbed on the surface of the cup and kettle products can be leveled and cured on the surface of the cup and kettle products.

[0053] Figure 1In the embodiment shown, since a cooling chamber 80 is provided, the baked cups and pots can be sent to the cooling chamber 80 by the conveyor line 10 for cooling and temperature reduction to prevent burns to the operators when the products are taken off the line.

[0054] Figure 1 In the embodiment shown, the hot air baking chamber 70 and the operating chamber 60 are located on the same side of the powder spraying chamber 20 (right side in the figure), and the cooling chamber 80 is located between the powder spraying chamber 20, the hot air baking chamber 70, and the operating chamber 60. With this design, the conveyor line 10 goes from the operating chamber 60 through the powder spraying chamber 20, then bends back to the hot air baking chamber 70, then bends back to the cooling chamber 80, and then bends back to the operating chamber 60, so that the conveyor line 10 has multiple bends. In this way, the entire powder spraying equipment occupies a small area, which is conducive to saving production space.

[0055] Figure 1 In the embodiment shown, the electrical cabinet 90 is arranged between the powder spraying chamber 20 and the operating room 60, which effectively utilizes this space, making the powder spraying equipment compact and occupying a small area.

[0056] Figure 1 In the illustrated embodiment, inspection doors 100 are provided at multiple locations to facilitate maintenance operations.

[0057] Figure 2 In the illustrated embodiment, the second positioning fixture 502 is located within the powder spraying chamber 503. A spray gun 504 sprays powder coating into the powder spraying chamber 503. A spray gun drive module 505 drives the spraying chamber to move up and down, so that the powder coating sprayed by the spray gun 504 can evenly adhere to different height positions on the cup / pot product. One side of the powder spraying chamber 503 has a first opening for the product and product fixture 30 to pass through; that is, the product and product fixture 30 can enter and exit the powder spraying chamber 503 through the first opening. The other side of the powder spraying chamber 503 has a second opening communicating with a vacuum cleaner 506; that is, the second opening of the powder spraying chamber 503 is connected to the vacuum cleaner 506, so that excess powder coating in the powder spraying chamber 503 can flow into the vacuum cleaner 506 through the second opening and be collected by the vacuum cleaner 506.

[0058] The powder coating machine 50 can be equipped with a fluidizing tank, which is used to fluidize the powder coating, so that the powder coating is fully fluidized, which is more conducive to improving the uniformity of spraying.

[0059] Figure 2In the illustrated embodiment, the bottom of the vacuum cleaner 506 is equipped with a discharge valve 507 and a discharge motor 508, and a dust collection box 509 is connected to the outlet of the discharge valve 507. Thus, after the discharge motor 508 opens the discharge valve 507, the powder coating accumulated inside the vacuum cleaner 506 can enter the dust collection box 509 through the outlet of the discharge valve 507. The dust collection box 509 has a discharge port, which is connected to the fluidizing tank or spray gun 504 via a circulation pipeline. This allows the powder coating in the dust collection box 509 to flow back to the fluidizing tank or spray gun 504 through the circulation pipeline and participate in spraying again, achieving a closed-loop circulation of the powder coating. This results in a very low waste rate of powder coating, which helps save production costs.

[0060] like Figures 3-5 As shown, the connecting part of the product fixture 30 and the seal (not shown in the figure), and the positioning part of the positioning fixture, can be connected in such a way that the top of the product fixture 30 is inserted into the connecting part of the seal, and the bottom of the product fixture 30 is inserted into the positioning part of the positioning fixture. In this way, the product fixture 30 is surrounded by the seal and the positioning fixture, making it less likely for powder coating to adhere.

[0061] like Figure 5 As shown, the product fixture 30 can be equipped with a limiting structure to restrict the insertion distance between the product fixture 30 and the seal and positioning fixture. This prevents misalignment during insertion. Specifically, Figure 5 In this design, the limiting structure includes a first boss 301 and a second boss 302. The first boss 301 limits the insertion distance between the product fixture 30 and the seal; when both are in place, the bottom surface of the seal abuts against the top surface of the first boss 301. The second boss 302 limits the insertion distance between the product fixture 30 and the first positioning fixture 40 and the second positioning fixture 502; when in place, the top surface of the positioning fixture abuts against the bottom surface of the second boss 302. Of course, the limiting structure is not limited to this; any structure that can achieve the above-mentioned effect of limiting the insertion distance is acceptable.

[0062] like Figure 5 As shown, the product fixture 30 can also be provided with a shielding structure. When the bottom of the product fixture 30 is inserted into the positioning part of the positioning fixture, the top opening of the positioning fixture is blocked by the shielding structure. This prevents powder coating from splashing onto the surface of the product fixture 30 through the top opening of the second positioning fixture 502. Specifically, Figure 5 In this structure, a retaining ring 303 is connected to the outer side of the second protrusion 302, and the retaining ring 303 and the second protrusion 302 together constitute a shielding structure. Of course, the shielding structure is not limited to this; any structure that can achieve the above-mentioned shielding effect is acceptable.

[0063] like Figure 5As shown, the product fixture 30 can also be equipped with a guide structure, which guides the bottom of the product fixture 30 to quickly insert into the positioning part of the positioning fixture. Specifically, Figure 5 In this product fixture 30, the bottom end is chamfered to form a tapered end 304, which constitutes a guide structure. Of course, the guide structure is not limited to this; any structure that can achieve the above-mentioned guiding effect is acceptable.

[0064] The powder coating process for the cups and kettles provided in this application includes the following steps.

[0065] S1. The operator in the control room 60 performs the cup and kettle product online operation: the cup and kettle product to be sprayed with powder is connected to the product fixture 30 through the corresponding sealing parts, and the product fixture 30 is connected to the first positioning fixture 40 on the conveyor line 10, so that the cup and kettle product is positioned on the first positioning fixture 40 by means of the product fixture 30.

[0066] S2. Conveyor line 10 transports the cup and kettle products to be powdered to the target powder spraying chamber 20. After the cup and kettle products are transported to the target powder spraying chamber 20, the robot arm 501 of the powder spraying machine 50 in the powder spraying chamber 20 grabs the product fixture 30 and connects the product fixture 30 to the second positioning fixture 502 of the powder spraying machine 50, so that the cup and kettle products are positioned on the second positioning fixture 502 by means of the product fixture 30.

[0067] S3. The powder spraying machine 50 sprays powder onto the positioned cup and kettle products. After the powder spraying is completed, the robot arm 501 of the powder spraying machine 50 grabs the product fixture 30 and connects the product fixture 30 to the first positioning fixture 40 on the conveyor line 10, so that the cup and kettle products are positioned on the first positioning fixture 40 with the help of the product fixture 30.

[0068] S4, conveyor line 10 transports the powder-coated cups and jugs to the hot air baking chamber 70 and the cooling chamber 80 in sequence for baking and cooling, respectively.

[0069] S5, conveyor line 10 transports the cooled cups and kettles to the control room 60, where operators perform the unloading operation.

[0070] The above examples illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A powder coating device for cups and kettles, characterized in that, The powder spraying equipment includes a conveyor line (10), a powder spraying chamber (20), multiple seals of different sizes, and multiple identical product fixtures (30); multiple first positioning fixtures (40) are installed on the conveyor line (10); a powder spraying machine (50) is arranged in the powder spraying chamber (20), and the powder spraying machine (50) includes a robot (501) and a second positioning fixture (502); the multiple seals of different sizes are used to seal the mouths of cups and kettles of different sizes, and the multiple seals of different sizes all have the same connecting part so that they can be connected to the same product fixture (30); the first positioning fixture (40) and the second positioning fixture (502) have the same positioning part so that they can be connected to the same product fixture (30), and the robot (501) grasps the product fixture (30) to realize the switching of cups and kettles between the first positioning fixture (40) and the second positioning fixture (502).

2. The powder spraying equipment for cups and kettles according to claim 1, characterized in that, The top of the product fixture (30) is inserted into the connecting part of the seal, and the bottom of the product fixture (30) is inserted into the positioning part of the positioning fixture. The product fixture (30) is provided with a limiting structure to limit the insertion distance between the product fixture (30) and the seal and the positioning fixture.

3. The powder spraying equipment for cups and kettles according to claim 2, characterized in that, The product fixture (30) is provided with a shielding structure. When the bottom of the product fixture (30) is inserted into the positioning part of the positioning fixture, the shielding structure blocks the top opening of the positioning fixture.

4. The powder spraying equipment for cups and kettles according to claim 2, characterized in that, The product fixture (30) is provided with a guide structure, which is responsible for guiding the bottom of the product fixture (30) to be quickly inserted into the positioning part of the positioning fixture.

5. The powder coating equipment for cups and kettles according to any one of claims 1-4, characterized in that, The powder spraying equipment includes a plurality of powder spraying chambers (20), and the powder spraying machine (50) in each powder spraying chamber (20) is used to spray powder coatings of different colors.

6. The powder spraying equipment for cups and kettles according to claim 5, characterized in that, The powder coating equipment includes an operating room (60) for operators to perform online and offline operations on cup and kettle products in the operating room (60), a hot air baking room (70) for baking cup and kettle products with powder coating in the hot air baking room (70), and a cooling room (80) for cooling down the baked cup and kettle products in the cooling room (80).

7. The powder spraying equipment for cups and kettles according to claim 6, characterized in that, The hot air baking chamber (70) and the operating chamber (60) are located on the same side of the powder spraying chamber (20). The cooling chamber (80) is located between the powder spraying chamber (20), the hot air baking chamber (70), and the operating chamber (60). The conveyor line (10) goes from the operating chamber (60), passes through the powder spraying chamber (20), bends back to the hot air baking chamber (70), bends back to the cooling chamber (80), and bends back to the operating chamber (60).

8. The powder coating equipment for cups and kettles according to any one of claims 1-4, characterized in that, The powder coating machine (50) includes a powder coating chamber (503), a fluidizing tank, a spray gun (504), a spray gun drive module (505), and a vacuum cleaner (506). The second positioning fixture (502) is located inside the powder coating chamber (503). The fluidizing tank is used to fluidize the powder coating. The spray gun (504) is connected to the fluidizing tank and is used to spray the powder coating into the powder coating chamber (503). The spray gun drive module (505) is connected to the spray gun (504) to drive the spray gun (504) to move up and down. One side of the powder coating chamber (503) is provided with a first cavity for the product and product fixture (30) to pass through. The other side of the powder coating chamber (503) is provided with a second cavity connected to the vacuum cleaner (506) so that the vacuum cleaner (506) can collect excess powder coating in the powder coating chamber (503).

9. The powder spraying equipment for cups and kettles according to claim 8, characterized in that, The bottom of the vacuum cleaner (506) is provided with a discharge valve (507) and a discharge motor (508). The powder spraying machine (50) includes a dust collection box (509), which is connected to the outlet of the discharge valve (507). The dust collection box (509) is provided with a discharge port, which is connected to the fluidizing tank or the spray gun (504) through a circulation pipeline to realize the closed-loop circulation of powder coating.

10. A powder coating process for cups and kettles, implemented using the powder coating equipment described in any one of claims 1-9, characterized in that, Includes the following steps, S1. The operator in the control room (60) performs the online operation of the cup and pot products: the cup and pot products to be sprayed with powder are connected to the product fixture (30) through the corresponding sealing parts, and the product fixture (30) is connected to the first positioning fixture (40) on the conveyor line (10) so that the cup and pot products are positioned on the first positioning fixture (40) by means of the product fixture (30). S2. The conveyor line (10) transports the cup and pot products to be sprayed with powder to the target powder spraying chamber (20). When the cup and pot products are transported to the target powder spraying chamber (20), the robot arm (501) of the powder spraying machine (50) in the powder spraying chamber (20) grabs the product fixture (30) and connects the product fixture (30) to the second positioning fixture (502) of the powder spraying machine (50), so that the cup and pot products are positioned on the second positioning fixture (502) with the help of the product fixture (30). S3. The powder spraying machine (50) sprays powder onto the positioned cup and kettle products. After the powder spraying is completed, the robot arm (501) of the powder spraying machine (50) grabs the product fixture (30) and connects the product fixture (30) to the first positioning fixture (40) on the conveyor line (10), so that the cup and kettle products are positioned on the first positioning fixture (40) with the help of the product fixture (30). S4. The conveyor line (10) transports the powder-sprayed cups and pots to the hot air baking chamber (70) and the cooling chamber (80) in sequence for baking and cooling, respectively. S5. The conveyor line (10) transports the cooled cup and kettle products to the control room (60), where the operators perform the unloading operation of the cup and kettle products.

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