Vertical spraying system for aluminum profiles

Abstract

The utility model relates to the technical field of aluminum profile spraying equipment, in particular to an aluminum profile vertical spraying system which comprises a pretreatment part, a drying part, a powder spraying part and a curing part which are sequentially arranged, an installation frame is arranged on the outer side of the drying part, and a first heating device used for heating the drying part is installed on the installation frame. The curing part is connected with a second heating device, the first heating device comprises a burner body, a control cabinet and an output pipeline connected to the burner body, and the output pipeline extends into the drying part. The first heating device is connected in the drying part, and the curing part is connected with the second heating device, so that the drying part can be separated from the curing part for independent heating, air is prevented from being induced from the curing part, and the problem that dust enters the drying part along with hot air in the air inducing process is solved; therefore, the problems that the product quality is reduced and the defective rate is increased due to the fact that dust is adsorbed on the surface of the aluminum profile are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum profile spraying equipment, specifically a vertical aluminum profile spraying system. Background Technology

[0002] Electrostatic powder coating of aluminum alloy profiles can give them excellent corrosion resistance and extend their service life. It can also provide different colors and textures, improve the surface uniformity and gloss, and meet the decoration requirements of different industries.

[0003] Before aluminum alloy profiles are coated, they need to be pretreated, including degreasing, passivation, cleaning, and drying, before powder coating and curing. However, in the current coating system, the drying oven and curing oven share the same burner. Hot air from the curing oven is introduced into the drying oven for drying. During the air intake process, dust from the curing oven is also introduced into the drying oven and adsorbed onto the profile surface. This results in many powder spots on the profile surface after curing. Especially when the weather gets colder, the moisture evaporation rate on the profile surface slows down, leaving more residual moisture. Dust is more easily adsorbed onto the profile surface, leading to an increase in the defect rate and requiring rework or scrapping. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a vertical spraying system for aluminum profiles, so as to solve the problem that the drying process of aluminum alloy spraying is easily contaminated by dust, which affects the product quality.

[0005] The technical solution adopted by this utility model is: a vertical spraying system for aluminum profiles, including a pretreatment section, a drying section, a powder spraying section, and a curing section arranged in sequence. A mounting frame is provided on the outside of the drying section, and a first heating device for heating the drying section is installed on the mounting frame. The curing section is connected to a second heating device. The first heating device includes a burner body, a control cabinet, and an output pipe connected to the burner body. The output pipe extends into the interior of the drying section.

[0006] The above structure has the following beneficial effects:

[0007] 1. By connecting a first heating device to the drying section and a second heating device to the curing section, the drying section can be heated independently of the curing section, avoiding the need for air to be drawn from the curing section. This solves the problem of dust entering the drying section along with the hot air during the air-drawing process, thus preventing dust from adhering to the surface of the aluminum profile, which would lead to a decrease in product quality and an increase in the defect rate.

[0008] 2. The burner body and control cabinet in the first heating device are both mounted on the mounting bracket outside the drying section, so that the solenoid valves and electronic components such as the control cabinet on the burner body are far away from the drying section, avoiding damage to the electronic components due to excessive temperature and improving their service life. At the same time, connecting the burner body to the drying section through the output pipe also ensures that the drying section can be heated stably.

[0009] Preferably, the burner body is also connected to an air intake pipe, which is a telescopic pipe, and a filter screen is installed at the end of the air intake pipe.

[0010] The intake pipe uses a telescopic tube, which allows for flexible adjustment of the intake port position. While ensuring a stable intake volume, the intake port is positioned in a less dusty direction, thereby reducing the amount of dust entering the burner body and preventing dust from affecting combustion efficiency. At the same time, the filter screen can further block dust and reduce the amount of dust entering the intake port.

[0011] Preferably, the end of the air intake pipe is also provided with a connector for connecting a filter screen. The connector is provided with a first connecting groove. The filter screen is provided with a rotating rod for connecting with the first connecting groove. The end of the connector away from the first connecting groove is also provided with a second fixing groove. The filter screen is provided with a fixing rod connected with the second fixing groove. The second fixing groove is provided with a buckle for limiting the fixing rod.

[0012] The first groove of the connector can be used to engage the rotating rod, so that the filter screen can rotate in the first connecting groove. During the rotation of the filter screen, the fixing rod at the other end of the filter screen can be engaged in the second fixing groove, and the filter screen can be fixed by the buckle. At the same time, this setting can also facilitate the disassembly of the filter screen for cleaning or replacement.

[0013] Preferably, a sliding groove is provided on one side wall of the second fixing groove, which penetrates the side wall of the second fixing groove. The buckle is slidably connected in the sliding groove, and an elastic element is provided between the buckle and the sliding groove. The end of the buckle away from the elastic element abuts against the side wall of the second fixing groove, and the side of the buckle facing the outside of the second fixing groove is an inclined surface.

[0014] This design allows the filter screen's fixing rod to slide along the sliding groove via the inclined surface when it moves to the buckle. Simultaneously, when the fixing rod enters the second fixing groove, the buckle automatically resets under the action of the elastic element and abuts against the side wall of the second fixing groove, thus fixing the fixing rod and effectively installing the filter screen onto the connector.

[0015] Preferably, the pretreatment unit includes an oil removal tank and a passivation tank, and a third heating mechanism for heating the oil removal tank and the passivation tank is installed in the oil removal tank and the passivation tank.

[0016] The original vertical spraying system required a large amount of degreasing agent and passivating agent in the pretreatment process. Through experiments, it was found that heating the bath solution in the degreasing tank and passivation tank to about 30 degrees Celsius resulted in good degreasing effect and significantly increased etching amount. Therefore, adding a third heating mechanism to the degreasing tank and passivation tank to heat the bath solution can effectively improve the pretreatment efficiency and reduce the consumption of bath solution, thereby reducing production costs.

[0017] Preferably, the third heating mechanism includes a heating pipe, a heat dissipation pipe, and a circulation pump for connecting the heating pipe and the heat dissipation pipe. The heating pipe is coiled in the curing section, and the heat dissipation pipe is coiled at the bottom of the degreasing tank and the passivation tank.

[0018] The heating pipe coil is located in the curing section. During the curing process, the liquid in the heating pipe can be heated by the heat in the curing oven, realizing the reuse of heat in the curing oven and reducing resource waste. At the same time, the heating pipe and the heat release pipe are connected by a circulating pump, which can realize continuous heat exchange and heat the degreasing tank and passivation tank by the temperature of the curing oven.

[0019] Preferably, a water supply tank is also provided between the heat release pipe and the circulation pump.

[0020] The water supply tank ensures that the heating and heat dissipation pipes have sufficient liquid volume. At the same time, by adjusting the water supply rate, the heating efficiency and heating effect of the heating pipes can also be adjusted.

[0021] Preferably, a temperature sensor is provided in the degreasing tank and the passivation tank, and the temperature sensor is also connected to a first controller, which is electrically connected to the circulating pump.

[0022] Temperature sensors can monitor the temperature of the liquid in the degreasing tank and passivation tank. At the same time, the first controller adjusts the pressure of the circulating pump according to the liquid temperature, thereby controlling the flow rate of the liquid in the heating pipe and the heat dissipation pipe, and thus adjusting the heating effect of the heating pipe, thereby realizing the automatic adjustment of the liquid temperature.

[0023] Preferably, a drain section is provided between the pretreatment section and the drying section.

[0024] The drainage section allows liquids and water droplets from the pretreatment process of the aluminum profiles to fall off before drying. This allows water to flow fully through the aluminum profiles to clean them, and also reduces water adhesion on the aluminum profiles as they enter the drying section, thus improving the drying effect and reducing the probability of dust adhesion. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the layout structure of a vertical spraying system for aluminum profiles according to Embodiment 1 of this utility model.

[0026] Figure 2 This is a three-dimensional schematic diagram of the installation structure of the mounting frame and the first heating device in Embodiment 1 of the vertical spraying system for aluminum profiles according to this utility model.

[0027] Figure 3 This is a front view schematic diagram of the mounting structure of the mounting bracket and the first heating device in Embodiment 1 of the vertical spraying system for aluminum profiles of this utility model.

[0028] Figure 4 for Figure 3 A magnified schematic diagram of the structure of region "A" in the middle.

[0029] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of "BB".

[0030] Figure 6 for Figure 4 A magnified schematic diagram of the structure of the "C" region in the middle.

[0031] Figure 7 This is a schematic diagram of the layout structure of a vertical spraying system for aluminum profiles according to Embodiment 2 of this utility model.

[0032] Figure 8 This is a schematic diagram of the layout of the degreasing tank, passivation tank and third heating mechanism in Example 2 of the vertical spraying system for aluminum profiles of this utility model.

[0033] Figure 9 This is a schematic diagram of the layout structure of a vertical spraying system for aluminum profiles according to embodiment 3 of this utility model.

[0034] The components include: a pretreatment section 10, an oil removal tank 11, a passivation tank 12, a drying section 20, a mounting frame 21, a powder spraying section 30, a curing section 40, a second heating device 41, a first heating device 50, a burner body 51, an output pipe 52, a control cabinet 53, an air intake pipe 54, a filter screen 55, a rotating rod 551, a fixing rod 552, a connector 56, a first connecting groove 561, a second fixing groove 562, a sliding groove 563, a buckle 57, an elastic element 58, a heating pipe 61, a heat release pipe 62, a circulating pump 63, a water replenishment tank 64, a draining section 70, and a conveying section 80. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] According to the instruction manual Figure 1-9 As shown, this utility model provides a vertical spraying system for aluminum profiles, including a feeding section, a discharging section, a pretreatment section 10, a drying section 20, a powder spraying section 30, and a curing section 40, as well as a conveying section 80 for driving the aluminum profiles to move. The conveying section 80 consists of a guide rail installed on the top of the workshop and a chain that moves along the guide rail. A second heating device 41 for heating the curing section 40 is installed in the curing section 40. A mounting bracket 21 is also fixedly connected to the outer wall of the drying section 20. A first heating device 50 is installed on the mounting bracket 21. The first heating device 50 includes a burner body 51 and a control cabinet 53. The burner body 51 and the control cabinet 53 are fixedly installed on one side of the side wall of the drying section 20 from the mounting bracket 21. An air inlet pipe 54 and an output pipe 52 are connected to the burner body 51. The output pipe 52 extends to the side wall of the drying section 20 and communicates with the inside of the drying section 20. In this embodiment, the air inlet pipe 54 is a telescopic pipe, which can flexibly adjust the position of the air inlet, thereby reducing the probability of dust entering the burner body 51.

[0038] The end of the intake pipe 54 is also provided with a connector 56, and a filter screen 55 is detachably connected to the connector 56. A waist-shaped first connecting groove 561 is opened on one side of the connector 56. A rotating rod 551 for engaging with the first connecting groove 561 is provided on the filter screen 55. At the same time, a second fixing groove 562 is also opened at the end of the connector 56 away from the first connecting groove 561. A fixing rod 552 for connecting to the second fixing groove 562 is also provided at the end of the filter screen 55 away from the rotating rod 551. A fixing rod 552 for locking the fixing rod 552 in the second fixing groove 562 is also installed. In this embodiment, the first connecting groove 561 is opened upwards, while the second fixing groove 562 is opened downwards, so that the rotating rod 551 can be rotatably connected in the first groove, and the fixing rod 552 is embedded in the second fixing groove 562 by rotation. This setting unlocks the buckle 57 when the filter screen 55 is replaced, so that the filter screen 55 will not fall off the connector 56, avoiding the dust accumulated on the filter screen 55 from falling into the workshop at will. At the same time, the filter screen 55 can also be limited by the first connecting groove 561, making the installation of the filter screen 55 more convenient.

[0039] In this embodiment, a sliding groove 563 is also provided on the outer side wall of the second fixing groove 562. The buckle 57 is slidably connected inside the sliding groove 563. A limiting rod is also connected to one end of the buckle 57 facing the outside of the connector 56. A limiting platform is also provided at one end of the second fixing groove 562 facing the outside of the connector 56. A limiting hole for the limiting rod to pass through is provided on the limiting platform. An elastic element 58 is also sleeved on the limiting rod. The elastic element 58 is a compression spring. One end of the elastic element 58 abuts against the limiting platform, and the other end of the elastic element 58 abuts against the side wall of the buckle 57. The setting of the elastic element 58 enables the buckle 57 to remain in abutting against the other side wall of the second fixing groove 562, ensuring that the filter screen 55 is locked to the end of the air inlet duct during use. At the same time, the end of the limiting rod away from the buckle 57 extends to the outside of the connector 56 and is connected to a handle, which makes it easy to lock or unlock the buckle 57.

[0040] In this embodiment, one side of the buckle 57 is a slope. The slope allows the buckle 57 to move toward the sliding groove 563 when the filter screen 55 is installed, so that it can enter the second fixing groove 562. At the same time, under the action of the elastic member 58, the buckle 57 can automatically pop out after the filter screen 55 is installed in place, so as to realize the function of automatically locking the filter screen 55.

[0041] Its working principle is as follows: In the aluminum profile spraying process, the conveyor 80 carries the aluminum profile into the pretreatment section 10. After a series of processes such as cleaning, degreasing, and passivation, it enters the drying section 20. In the drying section 20, it is dried by the heat from the first heating device 50. Then it enters the powder coating section 30 and the curing section 40. Under the heating of the second heating device 41 on the side of the curing section 40, the coating achieves self-leveling and curing. This allows the drying section 20 to be heated independently of the curing section 40, avoiding the problem of dust entering the drying section 20 with the hot air during the air extraction process. This prevents dust from adhering to the surface of the aluminum profile, which would lead to a decrease in product quality and an increase in the defect rate.

[0042] Meanwhile, in this embodiment, the first heating device 50 is installed on the mounting bracket 21, and the control cabinet 53 and the burner body 51 are separated from the drying section 20 by a certain distance to avoid the high temperature in the drying section 20 from affecting the components on the control cabinet 53 and the burner, thereby improving the service life of the first heating device 50.

[0043] After the first heating device 50 has been used for a long time, pulling the handle at the end of the limiting rod will unlock the buckle 57, causing the fixing rod 552 in the second fixing groove 562 to disengage and the filter screen 55 to rotate along the first connecting groove 561, after which it can be easily removed and replaced.

[0044] Example 2

[0045] According to the instruction manual Figure 7-8 As shown, the difference between this embodiment and embodiment 1 is that the pretreatment unit 10 includes an oil removal tank 11 and a passivation tank 12, and is provided with a third heating mechanism for heating the oil removal tank 11 and the passivation tank 12. The third heating mechanism includes a heating pipe 61 and a heat release pipe 62 that are connected to each other, and a circulation pump 63 located between the heating pipe 61 and the heat release pipe 62.

[0046] In this embodiment, the serpentine portion of the heating pipe 61 is located on the inner side wall of the curing section 40, and the liquid in the heating pipe 61 is heated by the temperature in the curing section 40. The coiled portion of the heat dissipation pipe 62 is located at the bottom of the degreasing tank 11 and the passivation tank 12, and heats the tank liquid. In this embodiment, two sets of third heating mechanisms are provided, which heat the degreasing tank 11 and the passivation tank 12 respectively.

[0047] A water supply tank 64 is installed between the heat release pipe 62 and the circulation pump 63. Temperature sensors are installed in the degreasing tank 11 and the passivation tank 12. The temperature sensors are connected to a first controller, which is electrically connected to the circulation pump 63. In this embodiment, the first controller is a PLC controller, which can adjust the pressure of the circulation pump 63 according to the temperature signal from the temperature sensor, thereby adjusting the water supply and changing the flow rate in the heat release pipe 62 and the heating pipe 61, thereby adjusting the heating effect and thus adjusting the temperature of the tank liquid in the degreasing tank 11 and the passivation tank 12, so that the tank liquid is kept at the temperature with the optimal reaction effect.

[0048] The instruction manual includes Figure 8 The arrows shown indicate the direction of water flow.

[0049] Its working principle is that when the curing section 40 is working, it can heat the heating pipe 61. Under the action of the circulating pump 63, the heating pipe 61 transports the high temperature liquid to the heat release pipe 62, and heats the tank liquid in the degreasing tank 11 and the passivation tank 12, so that the tank liquid in the degreasing tank 11 and the passivation tank 12 is kept at about 30 degrees, thereby improving the degreasing efficiency and the passivation efficiency.

[0050] Example 3

[0051] According to the instruction manual Figure 9 As shown, the difference between this embodiment and embodiment 2 is that a draining section 70 is provided between the pretreatment section 10 and the drying section 20. The draining section 70 is a serpentine reciprocating guide rail, which allows the chain and aluminum profile to move along the guide rail, increasing the time the aluminum profile moves between the pretreatment section 10 and the drying section 20, thereby causing the liquid on the aluminum profile to drip off, reducing the amount of liquid residue on the aluminum profile, and improving the subsequent drying effect.

[0052] The directional terms mentioned in this utility model, such as "up", "down", "left", and "right", are only for better and clearer explanation and understanding of this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] The preferred embodiments of this utility model have been described above, but should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are within the scope of protection of this utility model.

Claims

1. A vertical spraying system for aluminum profiles, comprising a pretreatment section, a drying section, a powder spraying section, and a curing section arranged sequentially, characterized in that, An installation frame is provided on the outside of the drying section, and a first heating device for heating the drying section is installed on the installation frame. A second heating device is connected to the curing section. The first heating device includes a burner body, a control cabinet, and an output pipe connected to the burner body. The output pipe extends into the interior of the drying section.

2. The vertical spraying system for aluminum profiles according to claim 1, characterized in that, The burner body is also connected to an air intake pipe, which is a telescopic pipe, and a filter screen is installed at the end of the air intake pipe.

3. The vertical spraying system for aluminum profiles according to claim 2, characterized in that, The end of the air intake pipe is also provided with a connector for connecting a filter screen. The connector is provided with a first connecting groove. The filter screen is provided with a rotating rod for connecting to the first connecting groove. The end of the connector away from the first connecting groove is also provided with a second fixing groove. The filter screen is provided with a fixing rod connected to the second fixing groove. The second fixing groove is provided with a buckle for limiting the fixing rod.

4. The vertical spraying system for aluminum profiles according to claim 3, characterized in that, A sliding groove is provided on one side wall of the second fixing groove, which penetrates the side wall of the second fixing groove. The buckle is slidably connected in the sliding groove, and an elastic element is provided between the buckle and the sliding groove. The end of the buckle away from the elastic element abuts against the side wall of the second fixing groove, and the side of the buckle facing the outside of the second fixing groove is an inclined surface.

5. The vertical spraying system for aluminum profiles according to claim 1, characterized in that, The pretreatment unit includes an oil removal tank and a passivation tank, and a third heating mechanism for heating the oil removal tank and the passivation tank is installed in the oil removal tank and the passivation tank.

6. The vertical spraying system for aluminum profiles according to claim 5, characterized in that, The third heating mechanism includes a heating pipe, a heat release pipe, and a circulation pump for connecting the heating pipe and the heat release pipe. The heating pipe is coiled in the curing section, and the heat release pipe is coiled at the bottom of the degreasing tank and the passivation tank.

7. The vertical spraying system for aluminum profiles according to claim 6, characterized in that, A water supply tank is also provided between the heat release pipe and the circulation pump.

8. The vertical spraying system for aluminum profiles according to claim 7, characterized in that, Temperature sensors are installed in the degreasing tank and the passivation tank. The temperature sensors are also connected to a first controller, which is electrically connected to the circulating pump.

9. The vertical spraying system for aluminum profiles according to claim 8, characterized in that, A drain section is also provided between the pretreatment section and the drying section.

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