A continuous paint spraying device for the production of plastic housings for household appliances

Abstract

This invention discloses a continuous spray painting device for producing plastic casings of household appliances, comprising two mounting plates, each with a support plate on one side. Through the coordinated operation of a rotating placement assembly and fixed spray nozzles on both sides, efficient and uniform spraying of the plastic casings of household appliances is achieved. When the plastic casing enters the spraying chamber, a servo motor drives the drive wheel to rotate via a reducer, which in turn drives the driven wheel and placement disc to rotate at a uniform speed via a transmission belt, causing the casing to continuously rotate as it moves forward. At the same time, the spray nozzles on both sides of the spraying chamber simultaneously atomize and spray paint onto the surface of the casing, significantly reducing the equipment manufacturing cost and debugging difficulty. Furthermore, since the casing rotation speed and the conveyor belt forward speed can be controlled independently, only the servo motor speed needs to be adjusted to adapt to different sizes and shapes of household appliance casings.

Description

Technical Field

[0001] This invention mainly relates to the technical field of surface treatment and automated coating of plastic products, specifically a continuous spray painting equipment for the production of plastic shells for household appliances. Background Technology

[0002] Plastic casings for home appliances refer to plastic structural components used to encapsulate, protect, or support the internal functional parts of household appliances. They are typically made from thermoplastic plastics such as ABS, polypropylene, and polycarbonate through injection molding. These casings not only protect internal components from external impacts, dust intrusion, and moisture penetration, but also constitute the exterior surface of the appliance, directly affecting its aesthetics and market acceptance. Typical products include air conditioner panels, television bezels, vacuum cleaner housings, air purifier housings, washing machine lids, and rice cooker covers.

[0003] In existing household appliance plastic casing painting equipment, the dust removal process typically relies on simple air blowing or suction. However, due to the accumulation of static charge on the surface of the plastic casing during injection molding, dust adheres firmly to the surface under electrostatic adsorption, making simple air blowing ineffective. This results in defects such as particles and pinholes in the painted film, severely impacting product appearance and yield. The painting process often uses manual handheld spray guns or simple fixed spray guns. Manual painting is inefficient and produces inconsistent quality. Fixed spray guns can only spray from a single direction, making it difficult to cover multiple sides of the casing, leading to uneven film thickness or painting dead spots. Using multi-axis painting robots is prohibitively expensive for small and medium-sized enterprises. The drying process often uses direct-exhaust hot air drying, where hot air is directly discharged after heat exchange with the casing, resulting in significant heat waste. Uneven temperature distribution within the drying chamber can cause localized overheating leading to plastic casing deformation or localized insufficient temperature resulting in incomplete paint curing, affecting product quality and production efficiency. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a continuous spray painting equipment for the production of plastic casings for household appliances, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A continuous spray painting equipment for producing plastic casings for household appliances includes two mounting plates, each mounting plate having a support plate on one side, a conveyor belt between the two mounting plates, and a rotating placement assembly on the top of the conveyor belt. A dust collection assembly is provided between the tops of the two support plates above the conveyor belt on one side, and a spraying assembly is provided between the tops of the two support plates on one side of the dust collection assembly, and a drying assembly is provided between the tops of the two support plates on one side of the spraying assembly.

[0006] Preferably, the rotating placement assembly includes a placement box, a placement disc, a support column, a driven wheel, a servo motor, a reducer, a drive wheel, and a transmission belt. The placement box is fixedly installed on the top of the conveyor belt, and the placement disc is fixedly installed on the top of the placement box. A support column is fixed at the center of the bottom wall of the placement box, and a driven wheel is connected to the top of the support column through a rotating shaft. The top of the driven wheel is connected to the bottom of the placement disc through a rotating shaft. A servo motor is fixedly installed on one side of the support column on the bottom wall of the placement box, and a reducer is connected to the output shaft end of the servo motor. A drive wheel is fixedly installed on the top of the reducer, and the drive wheel is connected to the driven wheel through a transmission belt.

[0007] Preferably, the dust collection assembly includes a dust collection chamber, an ion wind electrostatic eliminator, a flat air knife, and a negative pressure suction hood. The dust collection chamber is fixedly installed between the tops of the two support plates above one side of the conveyor belt. An ion wind electrostatic eliminator is fixedly installed on one side of the top wall of the dust collection chamber. A flat air knife is provided inside the dust collection chamber on one side of the ion wind electrostatic eliminator. The negative pressure suction hood is bolted to the top of the dust collection chamber. The top of the negative pressure suction hood is connected to an external dust collection device through a duct.

[0008] Preferably, the spraying assembly includes a spraying chamber, a spraying box, a spray nozzle, a first spraying pipe, a filter, a diaphragm pump, a second spraying pipe, and a paint bucket. The spraying chamber is fixedly installed between the tops of the two support plates on one side of the dust collection assembly, and spraying boxes are fixedly installed on both sides of the spraying chamber. Spray nozzles are fixedly installed on the opposite sides of the two spraying boxes. Each of the two spray boxes has a first spray pipe fixedly connected to its opposite side, and each of the two first spray pipes has a filter fixedly connected to one end through both sides of the spray chamber. Each of the two filters has a diaphragm pump fixedly connected to one end, and each of the two diaphragm pumps has a second spray pipe fixedly connected to one end. At the same time, each of the two second spray pipes has a paint bucket fixedly connected to one end.

[0009] Preferably, the drying assembly includes a drying chamber, a diffuser, an air outlet, an air inlet pipe, a heating pipe, a circulating fan, a recovery hood, a return air outlet, and an air outlet pipe. A drying chamber is provided between the tops of the two support plates on one side of the spraying assembly, and a diffuser is provided on one side of the drying chamber. Multiple air outlets are fixedly installed on one side of the diffuser, and an air inlet pipe is fixedly connected to the other side of the diffuser. One end of the air inlet pipe passes through one side of the drying chamber and is fixedly connected to a heating pipe, while one end of the heating pipe is fixedly connected to a circulating fan. The other side of the drying chamber is provided with a recovery hood, and multiple return air nozzles are fixedly installed on one side of the recovery hood. The other side of the recovery hood is provided with an air outlet pipe, and one end of the air outlet pipe is fixedly connected to the top of the circulating fan.

[0010] Preferably, a connecting box is fixedly connected between the spraying chamber outlet and the drying chamber inlet.

[0011] Preferably, curtains are fixedly installed on both sides of the dust removal chamber, at the inlet of the spraying chamber, and at the outlet of the drying chamber.

[0012] Preferably, both the top of the spraying chamber and the top of the drying chamber are bolted together with cover plates.

[0013] Preferably, the top surface of the placement disc is provided with anti-slip texture to increase the friction between the plastic casing of the appliance and the placement disc.

[0014] In summary, the present invention has the following main beneficial effects: By coordinating the rotating placement component with the fixed spray nozzles on both sides, efficient and uniform spraying of plastic shells for home appliances is achieved. When the plastic shell enters the spraying chamber, the servo motor drives the drive wheel to rotate through the reducer, which in turn drives the driven wheel and placement disc to rotate at a constant speed via the transmission belt. This allows the shell to rotate continuously as it moves forward. At the same time, the spray nozzles on both sides of the spraying chamber simultaneously atomize and spray paint onto the surface of the shell. This significantly reduces the equipment manufacturing cost and debugging difficulty. Furthermore, since the shell's rotation speed and the conveyor belt's forward speed can be controlled independently, it is only necessary to adjust the servo motor speed to adapt to different sizes and shapes of home appliance shells. This makes production changeover convenient and quick, and it is particularly suitable for the continuous automated production of various plastic parts for home appliances such as air conditioner panels, vacuum cleaner shells, and air purifier shells.

[0015] By employing the sequential coordination of the ion wind electrostatic eliminator, flat air knife, and negative pressure suction hood in the dust collection assembly, highly efficient cleaning of the plastic shell surface of home appliances is achieved. The ion wind electrostatic eliminator first blows alternating positive and negative ion winds onto the shell surface, completely neutralizing the static charge accumulated during the injection molding process due to friction. This causes the dust that was originally tightly adhered to the shell surface due to electrostatic adsorption to lose its adhesion. Subsequently, the flat air knife sprays a high-speed thin layer of airflow onto the shell surface at a certain angle, blowing away the loosened dust. At the same time, the negative pressure suction hood generates negative pressure to immediately suck in the blown dust and send it to the external dust collection equipment. This three-stage series structure of neutralization, blowing, and suction fundamentally solves the problem of dust being difficult to remove from the plastic shell of home appliances due to electrostatic effects, avoiding the shortcomings of traditional single blowing or single suction methods that result in incomplete dust removal.

[0016] By coordinating the hot air circulation system with the air outlets and return air nozzles in the drying assembly, efficient and energy-saving drying of the coated plastic shell is achieved. The circulating fan sends air into the heating tube and heats it to the set temperature. The hot air enters the diffuser through the air inlet pipe and is then blown evenly onto the surface of the shell by multiple air outlets, causing the paint film to dry and cure quickly. The air, which has cooled down after exchanging heat with the shell, enters the recovery hood through multiple return air nozzles and then returns to the circulating fan through the air outlet pipe, forming a complete hot air circulation loop. This allows the hot air to be repeatedly circulated in the drying chamber, avoiding the energy waste caused by the direct discharge of hot air in traditional drying equipment. At the same time, the even arrangement of multiple air outlets ensures the uniformity of the temperature field inside the drying chamber, preventing deformation of the plastic shell due to local overheating or incomplete curing of the paint film due to local insufficient temperature. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the placement box of the present invention; Figure 3 This is a schematic diagram of the dust collection component structure of the present invention; Figure 4 This is a schematic diagram of the spraying assembly structure of the present invention; Figure 5 This is a schematic diagram of the drying component structure of the present invention; Attached Figure Descriptions: 1. Mounting Plate; 2. Support Plate; 3. Conveyor Belt; 4. Placement Component; 41. Placement Box; 42. Placement Disc; 43. Support Column; 44. Driven Wheel; 45. Servo Motor; 46. Reducer; 47. Drive Wheel; 48. Transmission Belt; 5. Dust Collection Component; 51. Dust Removal Chamber; 52. Ionizing Air Static Eliminator; 53. Flat Air Knife; 54. Negative Pressure Suction Hood; 6. Spraying Component; 61. Spraying Chamber; 6 2. Spray box; 63. Spray nozzle; 64. First spray pipe; 65. Filter; 66. Diaphragm pump; 67. Second spray pipe; 68. Paint bucket; 7. Drying assembly; 71. Drying chamber; 72. Diffuser; 73. Air outlet; 74. Air inlet pipe; 75. Heating pipe; 76. Circulating fan; 77. Recovery hood; 78. Return air nozzle; 79. Air outlet pipe; 8. Connecting box; 9. Door curtain; 10. Cover plate; 11. Anti-slip texture. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] The embodiments of the present invention will now be described.

[0020] In this embodiment, as shown... Figure 1 , 2 As shown, a continuous spray painting equipment for producing plastic casings of household appliances includes two mounting plates 1, each with a support plate 2 on one side. The mounting plates 1 are used to fix the basic frame of the entire equipment, and the support plates 2 are used to provide a stable mounting platform for the components above. A conveyor belt 3 is provided between the two mounting plates 1. The conveyor belt 3 is used to continuously transport the plastic casings of household appliances through each processing station. A rotating placement component 4 is provided at the top of the conveyor belt 3. The rotating placement component 4 is used to drive the plastic casing to rotate during the spraying process to achieve uniform spraying from all directions. The rotating placement component 4 includes... The conveyor belt 3 includes a placement box 41, a placement disc 42, a support column 43, a driven wheel 44, a servo motor 45, a reducer 46, a drive wheel 47, and a transmission belt 48. The placement box 41 is fixedly installed on the top of the conveyor belt 3. The placement box 41 houses the internal transmission components and protects them from external contamination. The placement disc 42 is fixedly installed on the top of the placement box 41. The placement disc 42 directly supports the plastic casing of the appliance and provides a stable support surface. The top surface of the placement disc 42 has anti-slip textures 11, which increase friction between the plastic casing of the appliance and the placement disc 42 to prevent the casing from slipping during rotation. During rotation, a sliding offset occurs. A support column 43 is fixed at the center of the bottom wall of the placement box 41. The support column 43 supports the driven wheel 44 and the placement disk 42 and maintains their relative height with the bottom wall of the placement box 41. The top of the support column 43 is connected to the driven wheel 44 via a rotating shaft. The driven wheel 44 receives power from the driving wheel 47 and transmits it to the placement disk 42. The top of the driven wheel 44 is connected to the bottom of the placement disk 42 via a rotating shaft. This rotating shaft connection transmits the rotational motion of the driven wheel 44 to the placement disk 42. The bottom wall of the placement box 41 is located on one side of the support column 43. A servo motor 45 is fixedly installed. The servo motor 45 is used to provide power to drive the placement disk 42 to rotate. A reducer 46 is connected to the output shaft end of the servo motor 45. The reducer 46 is used to reduce the output speed of the servo motor 45 and increase the output torque to ensure that the placement disk 42 rotates smoothly. A drive wheel 47 is fixedly installed on the top of the reducer 46. The drive wheel 47 is used to transmit the power output by the reducer 46 to the transmission belt 48. The drive wheel 47 is connected to the driven wheel 44 through the transmission belt 48. The transmission belt 48 is used to transmit the rotational power of the drive wheel 47 to the driven wheel 44.

[0021] In this embodiment, as shown... Figure 1 , 3As shown, a dust collection assembly 5 is installed between the tops of the two support plates 2, above one side of the conveyor belt 3. The dust collection assembly 5 is used to remove static electricity and dust from the surface of the plastic casing of the household appliance to ensure the quality of subsequent spraying. The dust collection assembly 5 includes a dust collection chamber 51, an ion wind static eliminator 52, a flat air knife 53, and a negative pressure suction hood 54. The dust collection chamber 51 is fixedly installed between the tops of the two support plates 2, above one side of the conveyor belt 3. The dust collection chamber 51 is used to form a relatively closed dust collection space to prevent dust from spreading outward. An ion wind static eliminator 52 is fixedly installed on one side of the inner top wall of the dust collection chamber 51. The electrostatic eliminator 52 is used to blow alternating positive and negative ion winds onto the surface of the plastic shell to neutralize the static charge on the surface of the plastic shell. Inside the dust removal chamber 51, a flat air knife 53 is provided on one side of the electrostatic eliminator 52. The flat air knife 53 is used to spray a high-speed thin layer of airflow onto the surface of the plastic shell to blow away the dust that has been neutralized from the surface of the shell. The top of the dust removal chamber 51 is bolted to a negative pressure suction hood 54. The negative pressure suction hood 54 is used to suck in the suspended dust while the flat air knife 53 blows up the dust. At the same time, the top of the negative pressure suction hood 54 is connected to an external dust collection device through a duct.

[0022] In this embodiment, as shown... Figure 1 , 4 As shown, a spraying assembly 6 is provided between the tops of the two support plates 2 on one side of the dust collection assembly 5. The spraying assembly 6 is used to uniformly spray paint onto the surface of the plastic shell of the household appliance after dust removal. The spraying assembly 6 includes a spraying chamber 61, a spraying box 62, a spraying nozzle 63, a first spraying pipe 64, a filter 65, a diaphragm pump 66, a second spraying pipe 67, and a paint bucket 68. The spraying chamber 61 is fixedly installed between the tops of the two support plates 2 on one side of the dust collection assembly 5. The spraying chamber 61 is used to form a relatively closed spraying space to prevent paint mist from spreading outward and polluting the environment. Spraying boxes 62 are fixedly installed on both sides of the spraying chamber 61. The spraying boxes 62 are used to temporarily store the paint delivered from the paint bucket 68 and evenly distribute it to the spraying nozzles 63. Spraying nozzles 63 are fixedly installed on the opposite sides of the two spraying boxes 62. The spraying nozzles 63 are used to atomize the paint into fine particles. The paint is then sprayed onto the surface of the plastic casing. Two spray boxes 62 are each fixedly connected to a first spray pipe 64 on opposite sides. The first spray pipe 64 is used to transport filtered paint from the filter 65 to the spray box 62. One end of each of the two first spray pipes 64 passes through the spray chamber 61, and both sides are fixedly connected to filters 65. The filters 65 are used to filter impurities in the paint to prevent clogging of the spray nozzle 63. One end of each of the two filters 65 is fixedly connected to a diaphragm pump 66. The diaphragm pump 66 is used to pressurize the paint in the paint bucket 68 and deliver it to the filters 65 and the spray box 62. One end of each of the two diaphragm pumps 66 is fixedly connected to a second spray pipe 67. The second spray pipe 67 is used to transport paint from the paint bucket 68 to the diaphragm pump 66. Simultaneously, one end of each of the two second spray pipes 67 is fixedly connected to a paint bucket 68, which is used to store the paint required for spraying.

[0023] In this embodiment, as shown... Figure 1 , 5 As shown, a drying assembly 7 is provided between the tops of the two support plates 2 on one side of the spraying assembly 6. The drying assembly 7 is used to blow hot air onto the surface of the sprayed plastic shell to quickly dry and cure the paint film. The drying assembly 7 includes a drying chamber 71, a diffuser 72, an air outlet 73, an air inlet pipe 74, a heating pipe 75, a circulating fan 76, a recovery hood 77, a return air outlet 78, and an air outlet pipe 79. The drying chamber 71 is provided between the tops of the two support plates 2 on one side of the spraying assembly 6. The drying chamber 71 is used to form a relatively closed heating space to prevent heat loss and maintain a uniform internal temperature. A diffuser 72 is provided on one side of the drying chamber 71 to evenly distribute the heated air to each part of the shell. Multiple air outlets 73 are fixedly installed on one side of the diffuser 72. The air outlets 73 are used to blow hot air at a certain speed and direction onto the surface of the plastic shell to accelerate the drying of the paint film. An air inlet pipe 74 is fixedly connected to the other side of the diffuser 72. The air inlet pipe 74 is used to transport the hot air heated by the heating pipe 75 to the diffuser 72. One end of the air inlet pipe 74 passes through the drying chamber 71 and is fixedly connected to the heating pipe 75. The heating pipe 75 is used to heat the air delivered by the circulating fan 76 to the set drying temperature. At the same time, one end of the heating pipe 75 is fixedly connected to the circulating fan 76. The circulating fan 76 is used to drive the air to circulate between the drying chamber 71 and the heating pipe 75. A recovery hood 77 is provided on the other side of the drying chamber 71. The recovery hood 77 is used to collect air whose temperature has dropped after heat exchange with the plastic shell. Multiple return air nozzles 78 are fixedly installed on one side surface of the recovery hood 77. The return air nozzles 78 are used to draw the low-temperature air in the drying chamber 71 into the recovery hood 77. An air outlet duct 79 is provided on the other side of the recovery hood 77. The air outlet duct 79 is used to send the air collected by the recovery hood 77 back to the circulating fan 76. One end of the air outlet duct 79 is fixedly connected to the top of the circulating fan 76. This connection is used to form a complete hot air circulation loop to improve energy utilization efficiency. In this embodiment, as shown... Figure 1 As shown, curtains 9 are fixedly installed on both sides of the dust removal chamber 51, at the inlet of the spraying chamber 61, and at the outlet of the drying chamber 71. The curtains 9 prevent dust from escaping from both sides of the dust removal chamber 51, prevent paint mist from diffusing outwards from the inlet of the spraying chamber 61, and prevent hot air from escaping outwards from the outlet of the drying chamber 71. A connecting box 8 is fixedly connected between the outlet of the spraying chamber 61 and the inlet of the drying chamber 71. The connecting box 8 forms a transition channel between the spraying chamber 61 and the drying chamber 71, ensuring that the plastic shell, after spraying but not yet fully dried, is not contaminated by dust from the external environment before entering the drying chamber 71. Cover plates 10 are bolted to the tops of both the spraying chamber 61 and the drying chamber 71, allowing operators to easily open the tops of the spraying chamber 61 and the drying chamber 71 for internal inspection and cleaning.

[0024] The working principle of this invention is as follows: First, the plastic casing of the appliance to be coated is placed on top of the placement disc 42 of the rotating placement assembly 4. The anti-slip texture 11 on the top of the placement disc 42 is used to increase friction with the casing and prevent slippage. After the conveyor belt 3 is started, the conveyor belt 3 drives the placement box 41 and the casing on the placement disc 42 to move forward in sequence. When the casing enters the dust removal chamber 51 of the dust collection assembly 5 along with the conveyor belt 3, the ion wind static eliminator 52 first blows alternating positive and negative ion winds onto the surface of the casing to neutralize the static charge on the surface of the plastic casing, so that dust no longer adheres to the surface due to static electricity. Then, the flat air knife 53 sprays a high-speed thin layer of airflow onto the surface of the casing to blow the dust away from the surface of the casing. Simultaneously, the negative pressure suction hood 54 generates negative pressure through the external dust collection equipment connected by the air duct, sucking the blown dust into the negative pressure suction hood 54 and discharging it to the external dust collection equipment, thus completing the dust removal treatment of the outer shell surface. After dust removal, the outer shell continues to move forward with the conveyor belt 3 into the spraying chamber 61 of the spraying component 6. At this time, the rotating placement component 4 starts working. The servo motor 45 starts and drives the drive wheel 47 to rotate after being reduced in speed by the reducer 46. The drive wheel 47 drives the driven wheel 44 to rotate through the transmission belt 48. The driven wheel 44 drives the placement disc 42 and the plastic outer shell of the household appliance on the placement disc 42 to rotate at a uniform speed through the rotating shaft. At the same time, the paint in the two paint buckets 68 respectively... The paint enters the diaphragm pump 66 through the second spray pipe 67. The diaphragm pump 66 pressurizes the paint and sends it to the filter 65 for filtration to remove impurities. The filtered paint then enters the spray box 62 through the first spray pipe 64, and is finally atomized and sprayed out by the spray nozzles 63. The spray nozzles 63 on both sides simultaneously spray paint onto the two sides of the uniformly rotating outer shell, so that the outer shell surface is evenly covered. After spraying, the outer shell leaves the spray chamber 61 with the conveyor belt 3 and enters the drying chamber 71 of the drying assembly 7 through the connecting box 8. At this time, the circulating fan 76 starts to send air into the heating pipe 75 for heating. The heated air enters the diffuser 72 through the air inlet pipe 74, and then exits from one side of the diffuser 72. Multiple air nozzles 73 blow air evenly onto the surface of the outer casing, causing the paint film on the outer casing to dry and solidify quickly. After the hot air exchanges heat with the outer casing, its temperature decreases and it is collected into the recovery hood 77 through multiple return air nozzles 78 on one side of the recovery hood 77. Then, it returns to the circulating fan 76 through the air outlet 79 to form circulating hot air. During the operation of the whole machine, the curtains 9 installed on both sides of the dust removal chamber 51, the inlet of the spraying chamber 61, and the outlet of the drying chamber 71 are used to prevent dust, paint mist, and hot air from escaping. The cover plates 10 on the top of the spraying chamber 61 and the top of the drying chamber 71 facilitate internal maintenance. The connecting box 8 is used to ensure that the paint film that is not completely dried after spraying is not disturbed by the external environment before entering the drying chamber 71.

[0025] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A continuous spray painting equipment for producing plastic casings for household appliances, comprising two mounting plates (1), characterized in that: Each of the two mounting plates (1) is provided with a support plate (2) on one side, and a conveyor belt (3) is provided between the two mounting plates (1), and a rotating placement assembly (4) is provided on the top of the conveyor belt (3). A dust collection assembly (5) is provided between the tops of the two support plates (2) above the conveyor belt (3) on one side, and a spraying assembly (6) is provided between the tops of the two support plates (2) on one side of the dust collection assembly (5), and a drying assembly (7) is provided between the tops of the two support plates (2) on one side of the spraying assembly (6).

2. The continuous spray painting equipment for producing plastic casings for household appliances according to claim 1, characterized in that, The rotating placement assembly (4) includes a placement box (41), a placement disc (42), a support column (43), a driven wheel (44), a servo motor (45), a reducer (46), a drive wheel (47), and a transmission belt (48). The placement box (41) is fixedly installed on the top of the conveyor belt (3), and the placement disc (42) is fixedly installed on the top of the placement box (41). A support column (43) is fixed at the center of the bottom wall of the placement box (41), and a driven wheel (44) is connected to the top of the support column (43) through a rotating shaft, and the top of the driven wheel (44) is connected to the bottom of the placement disc (42) through a rotating shaft; A servo motor (45) is fixedly installed on the bottom wall of the inner wall of the placement box (41) on one side of the support column (43), and a reducer (46) is connected to the output shaft end of the servo motor (45). A drive wheel (47) is fixedly installed on the top of the reducer (46), and the drive wheel (47) is connected to the driven wheel (44) through a transmission belt (48).

3. The continuous spray painting equipment for producing plastic casings for household appliances according to claim 1, characterized in that, The dust collection assembly (5) includes a dust collection chamber (51), an ion wind static eliminator (52), a flat air knife (53), and a negative pressure suction hood (54). The dust collection chamber (51) is fixedly installed between the tops of the two support plates (2) above one side of the conveyor belt (3). The ion wind static eliminator (52) is fixedly installed on one side of the inner top wall of the dust collection chamber (51). The flat air knife (53) is provided inside the dust collection chamber (51) on one side of the ion wind static eliminator (52). The negative pressure suction hood (54) is installed on the top of the dust collection chamber (51) by bolts. The top of the negative pressure suction hood (54) is connected to an external dust collection device through a duct.

4. The continuous spray painting equipment for producing plastic casings for household appliances according to claim 1, characterized in that, The spraying assembly (6) includes a spraying chamber (61), a spraying box (62), a spray nozzle (63), a first spraying pipe (64), a filter (65), a diaphragm pump (66), a second spraying pipe (67), and a paint bucket (68). The spraying chamber (61) is fixedly installed between the tops of the two support plates (2) on one side of the dust collection assembly (5), and the spraying box (62) is fixedly installed on both sides of the spraying chamber (61). The spray nozzle (63) is fixedly installed on the opposite side of the two spraying boxes (62). Each of the two spray boxes (62) has a first spray pipe (64) fixedly connected to its opposite side. Each of the two first spray pipes (64) has a filter (65) fixedly connected to both sides of the spray chamber (61) at one end. Each of the two filters (65) has a diaphragm pump (66) fixedly connected to one end. Each of the two diaphragm pumps (66) has a second spray pipe (67) fixedly connected to one end. Each of the two second spray pipes (67) has a paint bucket (68) fixedly connected to one end.

5. The continuous spray painting equipment for producing plastic casings for household appliances according to claim 1, characterized in that, The drying assembly (7) includes a drying chamber (71), a diffuser (72), an air outlet (73), an air inlet pipe (74), a heating pipe (75), a circulating fan (76), a recovery hood (77), a return air nozzle (78), and an air outlet pipe (79). The drying chamber (71) is located between the tops of the two support plates (2) on one side of the spraying assembly (6). The diffuser (72) is located on one side inside the drying chamber (71). Multiple air outlets (73) are fixedly installed on one side of the diffuser (72). The air inlet pipe (74) is fixedly connected to the other side of the diffuser (72). One end of the air inlet pipe (74) passes through the drying chamber (71) and is fixedly connected to the heating pipe (75). At the same time, one end of the heating pipe (75) is fixedly connected to the circulating fan (76). The drying chamber (71) has a recovery hood (77) on the other side, and a plurality of return air nozzles (78) are fixedly installed on one side surface of the recovery hood (77), and an air outlet pipe (79) is provided on the other side of the recovery hood (77), and one end of the air outlet pipe (79) is fixedly connected to the top of the circulating fan (76).

6. The continuous spray painting equipment for producing plastic casings for household appliances according to claim 4, characterized in that, A connecting box (8) is fixedly connected between the outlet of the spraying chamber (61) and the inlet of the drying chamber (71).

7. A continuous spray painting equipment for producing plastic casings for household appliances according to claim 3, characterized in that, Curtains (9) are fixedly installed on both sides of the dust removal chamber (51), at the inlet of the spraying chamber (61), and at the outlet of the drying chamber (71).

8. A continuous spray painting equipment for producing plastic casings for household appliances according to claim 4, characterized in that, The top of the spraying chamber (61) and the top of the drying chamber (71) are both connected by bolts to cover plates (10).

9. A continuous spray painting equipment for producing plastic casings for household appliances according to claim 2, characterized in that, The top surface of the placement disc (42) is provided with anti-slip texture (11) to increase the friction between the plastic shell of the large appliance and the placement disc (42).

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