A production line for surface treatment before spraying automotive filter housings

Abstract

This invention provides a surface treatment production line for automotive filter housings before spraying, comprising: a pre-degreasing treatment tank, a main degreasing treatment tank, a first water washing tank, a silane treatment tank, a surface conditioning treatment tank, a phosphating treatment tank, a second water washing tank, a pure water rinsing tank, a drying oven, and a chain conveyor, installed sequentially from front to back. The conveyor chain on the chain conveyor runs longitudinally through the pre-degreasing treatment tank, main degreasing treatment tank, first water washing tank, silane treatment tank, surface conditioning treatment tank, phosphating treatment tank, second water washing tank, pure water rinsing tank, and drying oven. This invention can continuously perform pre-degreasing, main degreasing, first water washing, silane washing, surface conditioning liquid rinsing, phosphating treatment, second water washing, pure water rinsing, and drying on the surface of the automotive filter housing, completely removing all residual contaminants from the filter housing surface and improving the subsequent spraying quality of the automotive filter housing.

Description

Technical Field

[0001] This utility model relates to the technical field of filter production equipment, specifically to a production line for surface treatment before spraying automotive filter housings. Background Technology

[0002] Automotive filters are crucial components of automobiles, primarily functioning to filter and remove impurities and contaminants generated during vehicle operation to ensure the proper functioning of all automotive systems. The filter housing is a vital part of the automotive filter. During the actual production process, the filter housing requires surface coating. However, because the filter housing comes into contact with various contaminants such as grease, metal shavings, and dust during manufacturing, any residue remaining inside or on the surface of the filter housing will severely affect the coating quality. Therefore, after the filter housing is manufactured, it must undergo thorough surface treatment to remove all residual contaminants.

[0003] Existing technologies mostly involve placing the filter housing in a cleaning tank and using running water for cleaning. However, the cleaning power is limited, and it is difficult to completely remove all residual contaminants from the surface of the filter housing. This is not conducive to the subsequent painting process of the automotive filter housing, so improvements are needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a pre-coating surface treatment production line for automotive filter housings. This line can continuously perform pre-degreasing, primary degreasing, first water washing, silane washing, surface conditioning liquid rinsing, phosphating, second water washing, pure water rinsing, and drying on the surface of automotive filter housings. This process can completely remove all residual contaminants from the surface of the filter housing, thereby improving the subsequent coating quality of the automotive filter housings.

[0005] To achieve the above technical solution, this utility model provides a surface treatment production line for automotive filter housings before spraying, comprising: a pre-degreasing treatment tank for spraying pre-degreasing liquid to pre-degrease the automotive filter housing; a main degreasing treatment tank installed behind the pre-degreasing treatment tank for spraying main degreasing liquid to degrease the automotive filter housing; a first water washing tank installed behind the main degreasing treatment tank for spraying clean water to wash the degreased automotive filter housing; a silane treatment tank installed behind the first water washing tank for spraying silane liquid to treat the surface of the automotive filter housing; a surface conditioning treatment tank installed behind the silane treatment tank for spraying surface conditioning liquid to treat the surface of the automotive filter housing; and a phosphating treatment tank installed behind the surface conditioning treatment tank. The system includes: a treatment tank for spraying phosphating solution to phosphate the surface-conditioning treated automotive filter housing; a second water washing tank installed behind the phosphating treatment tank for spraying clean water to clean the phosphated automotive filter housing; a pure water rinsing tank installed behind the second water washing tank for spraying pure water to rinse the automotive filter housing; and an oven installed behind the pure water rinsing tank for hot air drying the cleaned automotive filter housing. A chain conveyor is used to transport the automotive filter housing, with the conveyor chain running longitudinally from front to back through the pre-degreasing treatment tank, main degreasing treatment tank, first water washing tank, silane treatment tank, surface-conditioning treatment tank, phosphating treatment tank, second water washing tank, pure water rinsing tank, and oven.

[0006] Preferably, the pre-degreasing treatment box includes a pre-degreasing box body, in which a pre-degreasing upper spray pipe with downward-facing nozzles is installed, and a pre-degreasing lower spray pipe with upward-facing nozzles is installed below the pre-degreasing upper spray pipe. A conveyor chain on a chain conveyor passes through the area between the pre-degreasing upper spray pipe and the pre-degreasing lower spray pipe. A pre-degreasing return water tank is installed in the pre-degreasing box body below the pre-degreasing lower spray pipe. A circulation pump is installed on one side of the pre-degreasing return water tank. The inlet of the circulation pump is connected to the pre-degreasing return water tank through a pipe, and the outlet of the circulation pump is connected to the pre-degreasing upper spray pipe and the pre-degreasing lower spray pipe through pipes respectively. A first heating temperature control plate is also installed in the pre-degreasing box body.

[0007] Preferably, the main degreasing treatment box includes a main degreasing box body. A main degreasing upper spray pipe with downward-facing nozzles is installed inside the main degreasing box body. A main degreasing lower spray pipe with upward-facing nozzles is installed below the main degreasing upper spray pipe. A conveyor chain on a chain conveyor passes through the area between the main degreasing upper spray pipe and the main degreasing lower spray pipe. A main degreasing return water tank is installed inside the main degreasing box body below the main degreasing lower spray pipe. A circulation pump is installed on one side of the main degreasing return water tank. The inlet of the circulation pump is connected to the main degreasing return water tank via a pipe, and the outlet of the circulation pump is connected to the main degreasing upper spray pipe and the main degreasing lower spray pipe via pipes respectively. A second heating temperature control plate is also installed inside the main degreasing box body.

[0008] Preferably, the first washing tank includes a first washing tank body, a first washing upper spray pipe with downward-facing nozzles installed inside the first washing tank body, a first washing lower spray pipe with upward-facing nozzles installed below the first washing upper spray pipe, a conveyor chain on a chain conveyor passing through the area between the first washing upper spray pipe and the first washing lower spray pipe, a first washing return water tank installed inside the first washing tank body below the first washing lower spray pipe, a circulation pump installed on one side of the first washing return water tank, the inlet of the circulation pump being connected to the first washing return water tank via a pipe, and the outlet of the circulation pump being connected to the first washing lower spray pipe and the first washing upper spray pipe via pipes respectively.

[0009] Preferably, the silane treatment box includes a silane treatment box body, an upper silane liquid spray pipe with downward-facing nozzles installed inside the silane treatment box body, a lower silane liquid spray pipe with upward-facing nozzles installed below the upper silane liquid spray pipe, a conveyor chain on a chain conveyor passing through the area between the upper and lower silane liquid spray pipes, a silane liquid return tank installed below the lower silane liquid spray pipe inside the silane treatment box body, a circulation pump installed on one side of the silane liquid return tank, the inlet of the circulation pump being connected to the silane liquid return tank via a pipe, and the outlet of the circulation pump being connected to the upper and lower silane liquid spray pipes via pipes respectively.

[0010] Preferably, the surface conditioning treatment box includes a surface conditioning treatment box body. An upper surface conditioning liquid spray pipe with downward-facing nozzles is installed inside the surface conditioning treatment box body. A lower surface conditioning liquid spray pipe with upward-facing nozzles is installed below the upper surface conditioning liquid spray pipe. A conveyor chain on a chain conveyor passes through the area between the upper and lower surface conditioning liquid spray pipes. A surface conditioning liquid return tank is installed below the lower surface conditioning liquid spray pipe inside the silane treatment box body. A circulation pump is installed on one side of the surface conditioning liquid return tank. The inlet of the circulation pump is connected to the surface conditioning liquid return tank through a pipe, and the outlet of the circulation pump is connected to the upper and lower surface conditioning liquid spray pipes through pipes respectively.

[0011] Preferably, the phosphating treatment box includes a phosphating treatment box body. An upper phosphating liquid spray pipe with downward-facing nozzles is installed inside the phosphating treatment box body, and a lower phosphating liquid spray pipe with upward-facing nozzles is installed below the upper phosphating liquid spray pipe. A conveyor chain on a chain conveyor passes through the area between the upper and lower phosphating liquid spray pipes. A phosphating liquid return water tank is installed inside the phosphating treatment box body below the lower phosphating liquid spray pipe. A circulation pump is installed on one side of the phosphating liquid return water tank. The inlet of the circulation pump is connected to the phosphating liquid return water tank through a pipe, and the outlet of the circulation pump is connected to the upper and lower phosphating liquid spray pipes through pipes respectively.

[0012] Preferably, the second washing tank includes a second washing tank body, a second washing upper spray pipe with downward-facing nozzles installed inside the second washing tank body, a second washing lower spray pipe with upward-facing nozzles installed below the second washing upper spray pipe, a conveyor chain on a chain conveyor passing through the area between the second washing upper spray pipe and the second washing lower spray pipe, a second washing return water tank installed inside the second washing tank body below the second washing lower spray pipe, a circulation pump installed on one side of the second washing return water tank, the inlet of the circulation pump being connected to the second washing return water tank via a pipe, and the outlet of the circulation pump being connected to the second washing lower spray pipe and the second washing upper spray pipe via pipes respectively.

[0013] Preferably, the pure water rinsing tank includes a pure water rinsing tank body, an upper pure water spray pipe with downward-facing nozzles installed inside the pure water rinsing tank body, a lower pure water spray pipe with upward-facing nozzles installed below the upper pure water spray pipe, a conveyor chain on a chain conveyor passing through the area between the upper and lower pure water spray pipes, a pure water return tank installed below the lower pure water spray pipe inside the pure water rinsing tank body, a circulation pump installed on one side of the pure water return tank, the inlet of the circulation pump being connected to the pure water return tank via a pipe, and the outlet of the circulation pump being connected to the upper and lower pure water spray pipes via pipes respectively.

[0014] Preferably, the top of the pre-degreasing treatment box and the main degreasing treatment box are equipped with a first water mist exhaust device, and the top of the silane treatment box, the surface conditioning treatment box, the phosphating treatment box, the second water washing box and the pure water rinsing box are equipped with a second water mist exhaust device.

[0015] The beneficial effects of the automotive filter housing pre-coating surface treatment production line provided by this utility model are as follows: This automotive filter housing pre-coating surface treatment production line has a high degree of automation and can continuously perform pre-degreasing, main degreasing, first water washing, silane washing, surface conditioning liquid rinsing, phosphating treatment, second water washing, pure water rinsing, and drying on the surface of the automotive filter housing. It can not only thoroughly remove various greases, metal debris, dust and other contaminants adhering to the surface of the automotive filter housing, but also increase the adhesion of the coating on the surface of the automotive filter housing through surface conditioning liquid rinsing and phosphating treatment, thereby improving the subsequent coating quality of the automotive filter housing. Attached Figure Description

[0016] Figure 1 This is a side view of the present invention.

[0017] Figure 2 This is a top view of the present invention.

[0018] Figure 3 This is a schematic diagram of the pre-degreasing treatment box and the main degreasing treatment box in this utility model.

[0019] Figure 4 for Figure 3 A cross-sectional view of plane AA.

[0020] Figure 5 This is a schematic diagram of the structure of the first water washing tank, silane treatment tank, surface conditioning treatment tank, phosphating treatment tank, second water washing tank, and pure water rinsing tank in this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the oven and the rear section of the chain conveyor in this utility model.

[0022] In the diagram: 1. Chain conveyor; 2. Pre-degreasing treatment box; 21. Pre-degreasing box body; 22. Pre-degreasing upper spray pipe; 23. Pre-degreasing lower spray pipe; 24. Pre-degreasing return water tank; 25. First heating temperature control plate; 26. Circulation pump; 3. Main degreasing treatment box; 31. Main degreasing box body; 32. Main degreasing upper spray pipe; 33. Main degreasing lower spray pipe; 34. Main degreasing return water tank; 35. Second heating temperature control plate; 4. First washing box; 41. First washing box body; 42. First washing upper spray pipe; 43. First washing lower spray pipe; 44. First washing return water tank; 5. Silane treatment box; 51. Silane treatment box body; 52. Upper silane liquid spray pipe; 53. Lower silane liquid spray pipe; 54. Silane liquid return water tank; 6. Surface conditioning treatment box; 61. Surface conditioning treatment chamber; 62. Upper surface conditioning solution spray pipe; 63. Lower surface conditioning solution spray pipe; 64. Surface conditioning solution return water tank; 7. Phosphating treatment chamber; 71. Phosphating treatment chamber; 72. Upper phosphating solution spray pipe; 73. Lower phosphating solution spray pipe; 74. Phosphating solution return water tank; 8. Second water washing chamber; 81. Second water washing chamber; 82. Second water washing upper spray pipe; 83. Second water washing lower spray pipe; 84. Second water washing return water tank; 9. Pure water rinsing chamber; 91. Pure water rinsing chamber; 92. Upper pure water spray pipe; 93. Lower pure water spray pipe; 94. Pure water return water tank; 10. Drying oven; 101. Drying oven body; 102. Fan; 103. Air duct; 11. First water mist exhaust device; 12. Second water mist exhaust device; 13. Water cut-off pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Example: A production line for surface treatment before spraying automotive filter housings.

[0025] Reference Figures 1 to 6 As shown, a surface treatment production line for automotive filter housings before spraying includes:

[0026] A pre-degreasing treatment box 2 is used to spray pre-degreasing liquid onto the outer shell of an automotive filter to pre-degrease it. The pre-degreasing treatment box 2 includes a pre-degreasing box body 21, inside which is installed an upper pre-degreasing spray pipe 22 with downward-facing nozzles. Below the upper pre-degreasing spray pipe 22 is a lower pre-degreasing spray pipe 23 with upward-facing nozzles. A conveyor chain on the chain conveyor 1 passes through the area between the upper and lower pre-degreasing spray pipes 22 and 23. The pre-degreasing chamber 21 contains a pre-degreasing return water tank 24 located below the pre-degreasing lower spray pipe 23. A circulation pump 26 is installed on one side of the pre-degreasing return water tank 24. The inlet of the circulation pump 26 is connected to the pre-degreasing return water tank 24 through a pipe, and the outlet of the circulation pump 26 is connected to the pre-degreasing upper spray pipe 22 and the pre-degreasing lower spray pipe 23 through pipes respectively. A first heating temperature control plate 25 is also installed inside the pre-degreasing chamber 21. In actual operation, a large number of car filter housings are placed on the conveyor chain of the chain conveyor 1. When the car filter housings placed on the conveyor chain pass through the area between the pre-degreasing upper spray pipe 22 and the pre-degreasing lower spray pipe 23, the pre-degreasing upper spray pipe 22 and the pre-degreasing lower spray pipe 23 simultaneously spray pre-degreasing liquid onto the car filter housings (in this embodiment, the pre-degreasing liquid is formed by mixing and stirring a 4% alkaline degreasing powder solution and a 16% alkaline degreasing agent). The pre-degreasing liquid is sprayed to pre-treat the oil stains adhering to the surface of the car filter housings. The sprayed pre-degreasing liquid is collected through the pre-degreasing return water tank 24, filtered and adjusted, and then pumped back to the pre-degreasing upper spray pipe 22 and the pre-degreasing lower spray pipe 23 for recycling. The temperature inside the pre-degreasing treatment tank 2 can be controlled by the first heating temperature control plate 25 installed in the pre-degreasing tank 21.

[0027] A main degreasing treatment box 3 is installed behind the pre-degreasing treatment box 2. The main degreasing treatment box 3 is used to spray the main degreasing liquid to degrease the outer shell of the automotive filter. The main degreasing treatment box 3 includes a main degreasing box body 31. A main degreasing upper spray pipe 32 with downward-facing nozzles is installed inside the main degreasing box body 31. A main degreasing lower spray pipe 33 with upward-facing nozzles is installed below the main degreasing upper spray pipe 32. The conveyor chain on the chain conveyor 1 connects the main degreasing upper spray pipe 32 and the main degreasing lower spray pipe 33. The area between the lower grease spray pipes 33 is through which the main degreasing tank 31 is located below the main lower grease spray pipe 33. A main degreasing return water tank 34 is installed inside the main degreasing tank 31. An independent circulation pump is installed on one side of the main degreasing return water tank 34. The inlet of the circulation pump is connected to the main degreasing return water tank 34 through a pipe. The outlet of the circulation pump is connected to the main upper grease spray pipe 32 and the main lower grease spray pipe 33 through pipes respectively. A second heating temperature control plate 35 is also installed inside the main degreasing tank 31. In actual operation, when the pre-degreasing car filter housing is moved by the conveyor chain to the area between the main degreasing upper spray pipe 32 and the main degreasing lower spray pipe 33, the main degreasing upper spray pipe 32 and the main degreasing lower spray pipe 33 simultaneously spray the main degreasing liquid onto the car filter housing (in this embodiment, the main degreasing liquid is formed by mixing and stirring a 10% alkaline degreasing powder solution and a 5% alkaline degreasing agent). The spraying of the main degreasing liquid removes the oil stains adhering to the surface of the car filter housing. The sprayed main degreasing liquid is collected through the main degreasing return water tank 34, filtered and adjusted, and then pumped back to the main degreasing upper spray pipe 32 and the main degreasing lower spray pipe 33 for recycling. The temperature inside the main degreasing treatment tank 3 can be controlled by the second heating temperature control plate 35 installed in the main degreasing tank 31.

[0028] A first water wash tank 4 is installed behind the main degreasing treatment tank 3. The first water wash tank 4 is used to spray clean water to clean the outer shell of the degreased car filter. The first water wash tank 4 includes a first water wash tank body 41. A first water wash upper spray pipe 42 with the nozzle facing downward is installed in the first water wash tank body 41. A first water wash lower spray pipe 43 with the nozzle facing upward is installed below the first water wash upper spray pipe 42. The conveyor chain on the chain conveyor 1 passes through the area between the first water wash upper spray pipe 42 and the first water wash lower spray pipe 43. A first water wash return water tank 44 is installed in the first water wash tank body 41 below the first water wash lower spray pipe 43. A circulation pump is installed on one side of the first water wash return water tank 44. The inlet of the circulation pump is connected to the first water wash return water tank 44 through a pipe. The outlet of the circulation pump is connected to the first water wash lower spray pipe 42 and the first water wash upper spray pipe 43 through pipes respectively. In actual operation, when the car filter housing, after undergoing primary degreasing, moves via a conveyor chain to the area between the first water wash upper spray pipe 42 and the first water wash lower spray pipe 43, the first water wash upper spray pipe 42 and the first water wash lower spray pipe 43 simultaneously spray clean water onto the car filter housing. The clean water performs high-pressure rinsing on the surface of the car filter housing, removing impurities such as oil, metal shavings, and dust adhering to the surface of the car filter housing. The rinsing water is collected in the first water wash return tank 44, filtered, and then pumped back to the first water wash upper spray pipe 42 and the first water wash lower spray pipe 43 for recycling, thus saving water.

[0029] A silane treatment tank 5 is installed behind the first water washing tank 4. The silane treatment tank 5 is used to spray silane liquid to treat the surface of the car filter housing. The silane treatment tank 5 includes a silane treatment tank body 51. An upper silane liquid spray pipe 52 with a downward-facing nozzle is installed inside the silane treatment tank body 51. A lower silane liquid spray pipe 53 with an upward-facing nozzle is installed below the upper silane liquid spray pipe 52. The conveyor chain on the chain conveyor 1 passes through the area between the upper silane liquid spray pipe 52 and the lower silane liquid spray pipe 53. A silane liquid return water tank 54 is installed inside the silane treatment tank body 51 below the lower silane liquid spray pipe 53. A circulation pump is installed on one side of the silane liquid return water tank 54. The inlet of the circulation pump is connected to the silane liquid return water tank 54 through a pipe. The outlet of the circulation pump is connected to the upper silane liquid spray pipe 52 and the lower silane liquid spray pipe 53 through pipes respectively. In actual operation, after the first rinse, the car filter housing moves via a conveyor chain to the area between the upper silane liquid spray pipe 52 and the lower silane liquid spray pipe 53. At the same time, the upper silane liquid spray pipe 52 and the lower silane liquid spray pipe 53 spray 8% silane liquid onto the car filter housing. Spraying silane liquid can greatly enhance the adhesion between the car filter housing and the coating, and at the same time provide excellent anti-corrosion (anti-rust) protection. The sprayed silane liquid will be collected through the silane liquid return tank 54, filtered and adjusted, and then transported back to the upper silane liquid spray pipe 52 and the lower silane liquid spray pipe 53 for recycling.

[0030] A surface conditioning treatment box 6 is installed behind the silane treatment box 5. The surface conditioning treatment box 6 is used to spray surface conditioning liquid to treat the surface of the car filter housing. The surface conditioning treatment box 6 includes a surface conditioning treatment box body 61. An upper surface conditioning liquid spray pipe 62 with a downward-facing nozzle is installed inside the surface conditioning treatment box body 61. A lower surface conditioning liquid spray pipe 63 with an upward-facing nozzle is installed below the upper surface conditioning liquid spray pipe 62. The conveyor chain on the chain conveyor 1 passes through the area between the upper surface conditioning liquid spray pipe 62 and the lower surface conditioning liquid spray pipe 63. A surface conditioning liquid return water tank 64 is installed inside the silane treatment box body 61 below the lower surface conditioning liquid spray pipe 63. A circulation pump is installed on one side of the surface conditioning liquid return water tank 64. The inlet of the circulation pump is connected to the surface conditioning liquid return water tank 64 through a pipe. The outlet of the circulation pump is connected to the upper surface conditioning liquid spray pipe 62 and the lower surface conditioning liquid spray pipe 63 through pipes respectively. In actual operation, when the car filter housing after silane treatment moves to the area between the upper surface conditioning spray pipe 62 and the lower surface conditioning spray pipe 63 via a conveyor chain, the upper surface conditioning spray pipe 62 and the lower surface conditioning spray pipe 63 simultaneously spray a surface conditioning solution with a mass concentration of 0.3% (in this embodiment, the surface conditioning solution is diluted from surface conditioning powder) onto the car filter housing. Spraying the surface conditioning solution can "prepare" for the subsequent phosphating treatment, ensuring the formation of a uniform, dense, and fine phosphating film. The sprayed surface conditioning solution will be collected through the surface conditioning solution return tank 64, filtered and adjusted, and then transported back to the upper surface conditioning spray pipe 62 and the lower surface conditioning spray pipe 63 for recycling via a circulation pump.

[0031] A phosphating treatment box 7 is installed behind the surface conditioning treatment box 6. The phosphating treatment box 7 is used to spray phosphating solution to phosphate the outer shell of the automotive filter after surface conditioning treatment. The phosphating treatment box 7 includes a phosphating treatment box body 71. An upper phosphating solution spray pipe 72 with the nozzle facing downward is installed inside the phosphating treatment box body 71. A lower phosphating solution spray pipe 73 with the nozzle facing upward is installed below the upper phosphating solution spray pipe 72. The conveyor chain on the chain conveyor 1 passes through the area between the upper phosphating solution spray pipe 72 and the lower phosphating solution spray pipe 73. A phosphating solution return water tank 74 is installed inside the phosphating treatment box body 71 below the lower phosphating solution spray pipe 73. A circulation pump is installed on one side of the phosphating solution return water tank 74. The inlet of the circulation pump is connected to the phosphating solution return water tank 74 through a pipe. The outlet of the circulation pump is connected to the upper phosphating solution spray pipe 72 and the lower phosphating solution spray pipe 73 through pipes respectively. In actual operation, when the car filter housing, after surface conditioning, moves to the area between the upper phosphating spray pipe 72 and the lower phosphating spray pipe 73 via a conveyor chain, the upper phosphating spray pipe 72 and the lower phosphating spray pipe 73 simultaneously spray a phosphating solution with a mass concentration of 10% onto the car filter housing. Through the spraying of the phosphating solution, a stable and porous phosphate conversion film is generated on the surface of the car filter housing through a chemical reaction, which greatly improves the coating adhesion and corrosion resistance. The sprayed phosphating solution is collected in the phosphating solution return tank 74, filtered and adjusted, and then pumped back to the upper phosphating spray pipe 72 and the lower phosphating spray pipe 73 for recycling.

[0032] A second water wash tank 8 is installed behind the phosphating treatment tank 7. The second water wash tank 8 is used to spray clean water to clean the outer shell of the phosphating car filter. The second water wash tank 8 includes a second water wash tank body 81. A second water wash upper spray pipe 82 with downward-facing nozzles is installed inside the second water wash tank body 81. A second water wash lower spray pipe 83 with upward-facing nozzles is installed below the second water wash upper spray pipe 82. The conveyor chain on the chain conveyor 1 passes through the area between the second water wash upper spray pipe 82 and the second water wash lower spray pipe 83. A second water wash return water tank 84 is installed inside the second water wash tank body 8 below the second water wash lower spray pipe 83. A circulation pump is installed on one side of the second water wash return water tank 84. The inlet of the circulation pump is connected to the second water wash return water tank 84 through a pipe. The outlet of the circulation pump is connected to the second water wash lower spray pipe 82 and the second water wash upper spray pipe 83 through pipes respectively. In actual operation, when the phosphated car filter housing is moved by the conveyor chain to the area between the second water wash upper spray pipe 82 and the second water wash lower spray pipe 83, the second water wash upper spray pipe 82 and the second water wash lower spray pipe 83 simultaneously spray clean water onto the car filter housing. The clean water performs high-pressure rinsing on the surface of the car filter housing. The cleaning water is collected through the second water wash return tank 84, filtered, and then pumped back to the second water wash upper spray pipe 82 and the second water wash lower spray pipe 83 for recycling, so as to save water.

[0033] A pure water rinsing tank 9 is installed behind the second water washing tank 8. The pure water rinsing tank 9 is used to spray pure water to rinse the outer shell of the car filter. The pure water rinsing tank 9 includes a pure water rinsing tank body 91. An upper pure water spray pipe 92 with a downward-facing nozzle is installed inside the pure water rinsing tank body 91. A lower pure water spray pipe 93 with an upward-facing nozzle is installed below the upper pure water spray pipe 92. The conveyor chain on the chain conveyor 1 passes through the area between the upper pure water spray pipe 92 and the lower pure water spray pipe 93. A pure water return tank 94 is installed inside the pure water rinsing tank body 91 below the lower pure water spray pipe 93. A circulation pump is installed on one side of the pure water return tank 94. The inlet of the circulation pump is connected to the pure water return tank 94 through a pipe. The outlet of the circulation pump is connected to the upper pure water spray pipe 92 and the lower pure water spray pipe 93 through pipes respectively. In actual operation, after being rinsed with clean water, the car filter housing moves via a conveyor chain to the area between the upper pure water spray pipe 92 and the lower pure water spray pipe 93. At the same time, the upper pure water spray pipe 92 and the lower pure water spray pipe 93 spray pure water (deionized water) onto the car filter housing. The pure water performs high-pressure rinsing on the surface of the car filter housing, thoroughly removing residual chemical agents. The pure water is collected through the pure water return tank 94, treated, and then pumped back to the upper pure water spray pipe 92 and the lower pure water spray pipe 93 for recycling, thereby saving costs.

[0034] An oven 10 is installed behind the pure water rinsing tank 9. The oven 10 is used to dry the cleaned automotive filter housing with hot air. The oven 10 includes an oven body 101, with a conveyor chain on the chain conveyor 1 running from front to back through the oven body 10. A fan 102 is installed on top of the oven body 101 and connected to the oven body 101 via an air duct 103. In actual operation, the automotive filter housing, after being rinsed with pure water, moves into the oven body 101 via the conveyor chain. Hot air is continuously supplied to the oven body 101 by the fan 102, thus drying the automotive filter housing.

[0035] Chain conveyor 1 is used to transport the housing of automotive filter. The conveying chain on the chain conveyor 1 passes through the pre-degreasing treatment box 2, the main degreasing treatment box 3, the first water washing box 4, the silane treatment box 5, the surface conditioning treatment box 6, the phosphating treatment box 7, the second water washing box 8, the pure water rinsing box 9, and the drying oven 10 in a longitudinal direction from front to back.

[0036] In this embodiment, a first water mist exhaust device 11 is installed on the top of the pre-degreasing treatment box 2 and the main degreasing treatment box 3, and a second water mist exhaust device 12 is installed on the top of the silane treatment box 5, the surface conditioning treatment box 6, the phosphating treatment box 7, the second water washing box 8, and the pure water rinsing box 9. The installation of the first water mist exhaust device 11 and the second water mist exhaust device 12 prevents water mist from accumulating in the pre-degreasing treatment box 2, the main degreasing treatment box 3, the silane treatment box 5, the surface conditioning treatment box 6, the phosphating treatment box 7, the second water washing box 8, and the pure water rinsing box 9. A water-cutting pipe 13 is installed in both the silane treatment box 5 and the pure water rinsing box 9. This pipe allows high-pressure air to be blown onto the rinsed car filter housing to quickly remove moisture from the surface of the car filter housing, preventing water stains and reducing drying energy consumption.

[0037] This automotive filter housing pre-coating surface treatment production line is highly automated and can continuously perform pre-degreasing, main degreasing, first water washing, silane washing, surface conditioning solution rinsing, phosphating, second water washing, pure water rinsing, and drying on the surface of the automotive filter housing. It can not only thoroughly remove various greases, metal shavings, dust and other contaminants adhering to the surface of the automotive filter housing, but also increase the adhesion of the coating on the surface of the automotive filter housing through surface conditioning solution rinsing and phosphating, thereby improving the subsequent coating quality of the automotive filter housing.

[0038] The above description is only a preferred embodiment of the present utility model. However, the present utility model should not be limited to the content disclosed in the embodiment and the accompanying drawings. Therefore, any equivalent or modified embodiments made without departing from the spirit disclosed in the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A surface treatment production line for automotive filter housings before spraying, characterized in that... include: The pre-degreasing treatment box is used to spray pre-degreasing liquid onto the car filter housing for pre-degreasing. The main degreasing treatment box, installed behind the pre-degreasing treatment box, is used to spray the main degreasing liquid to degrease the car filter housing; The first water wash tank, installed behind the main degreasing treatment tank, is used to spray clean water to clean the car filter housing after degreasing. The silane treatment tank, installed behind the first water washing tank, is used to spray silane liquid to treat the surface of the car filter housing. The surface conditioning treatment box, installed behind the silane treatment box, is used to spray surface conditioning fluid to treat the surface of the automotive filter housing. The phosphating treatment box, installed behind the surface conditioning treatment box, is used to spray phosphating solution to phosphate the car filter housing after surface conditioning treatment. The second water washing tank, installed behind the phosphating treatment tank, is used to spray clean water to clean the car filter housing after phosphating. The pure water rinsing tank, installed behind the second water washing tank, is used to spray pure water to rinse the car filter housing. The drying oven installed behind the pure water rinsing tank is used to dry the car filter housing with hot air after cleaning. A chain conveyor is used to transport automotive filter housings. The conveyor chain on the chain conveyor runs longitudinally from front to back through the pre-degreasing treatment box, the main degreasing treatment box, the first water washing box, the silane treatment box, the surface conditioning treatment box, the phosphating treatment box, the second water washing box, the pure water rinsing box, and the drying oven.

2. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The pre-degreasing treatment box includes a pre-degreasing box body. An upper pre-degreasing spray pipe with downward-facing nozzles is installed inside the pre-degreasing box body. A lower pre-degreasing spray pipe with upward-facing nozzles is installed below the upper pre-degreasing spray pipe. A conveyor chain on a chain conveyor passes through the area between the upper and lower pre-degreasing spray pipes. A pre-degreasing return water tank is installed inside the pre-degreasing box body below the lower pre-degreasing spray pipe. A circulation pump is installed on one side of the pre-degreasing return water tank. The inlet of the circulation pump is connected to the pre-degreasing return water tank via a pipe, and the outlet of the circulation pump is connected to both the upper and lower pre-degreasing spray pipes via pipes. A first heating temperature control plate is also installed inside the pre-degreasing box body.

3. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The main degreasing treatment box includes a main degreasing box body. A main degreasing upper spray pipe with downward-facing nozzles is installed inside the main degreasing box body. A main degreasing lower spray pipe with upward-facing nozzles is installed below the main degreasing upper spray pipe. A conveyor chain on a chain conveyor passes through the area between the main degreasing upper spray pipe and the main degreasing lower spray pipe. A main degreasing return water tank is installed inside the main degreasing box body below the main degreasing lower spray pipe. A circulation pump is installed on one side of the main degreasing return water tank. The inlet of the circulation pump is connected to the main degreasing return water tank via a pipe, and the outlet of the circulation pump is connected to both the main degreasing upper spray pipe and the main degreasing lower spray pipe via pipes. A second heating temperature control plate is also installed inside the main degreasing box body.

4. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The first washing tank includes a first washing tank body. A first washing upper spray pipe with downward-facing nozzles is installed inside the first washing tank body. A first washing lower spray pipe with upward-facing nozzles is installed below the first washing upper spray pipe. A conveyor chain on a chain conveyor passes through the area between the first washing upper spray pipe and the first washing lower spray pipe. A first washing return water tank is installed inside the first washing tank body below the first washing lower spray pipe. A circulation pump is installed on one side of the first washing return water tank. The inlet of the circulation pump is connected to the first washing return water tank through a pipe. The outlet of the circulation pump is connected to the first washing lower spray pipe and the first washing upper spray pipe through pipes respectively.

5. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The silane treatment box includes a silane treatment box body. An upper silane liquid spray pipe with downward-facing nozzles is installed inside the silane treatment box body. A lower silane liquid spray pipe with upward-facing nozzles is installed below the upper silane liquid spray pipe. A conveyor chain on a chain conveyor passes through the area between the upper and lower silane liquid spray pipes. A silane liquid return tank is installed inside the silane treatment box body below the lower silane liquid spray pipe. A circulation pump is installed on one side of the silane liquid return tank. The inlet of the circulation pump is connected to the silane liquid return tank through a pipe, and the outlet of the circulation pump is connected to the upper and lower silane liquid spray pipes through pipes respectively.

6. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The surface conditioning treatment box includes a surface conditioning treatment box body. An upper surface conditioning liquid spray pipe with downward-facing nozzles is installed inside the surface conditioning treatment box body. A lower surface conditioning liquid spray pipe with upward-facing nozzles is installed below the upper surface conditioning liquid spray pipe. A conveyor chain on a chain conveyor passes through the area between the upper and lower surface conditioning liquid spray pipes. A surface conditioning liquid return tank is installed below the lower surface conditioning liquid spray pipe inside the silane treatment box body. A circulation pump is installed on one side of the surface conditioning liquid return tank. The inlet of the circulation pump is connected to the surface conditioning liquid return tank through a pipe, and the outlet of the circulation pump is connected to the upper and lower surface conditioning liquid spray pipes through pipes respectively.

7. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The phosphating treatment box includes a phosphating treatment box body. An upper phosphating liquid spray pipe with downward-facing nozzles is installed inside the phosphating treatment box body. A lower phosphating liquid spray pipe with upward-facing nozzles is installed below the upper phosphating liquid spray pipe. A conveyor chain on a chain conveyor passes through the area between the upper and lower phosphating liquid spray pipes. A phosphating liquid return water tank is installed inside the phosphating treatment box body below the lower phosphating liquid spray pipe. A circulation pump is installed on one side of the phosphating liquid return water tank. The inlet of the circulation pump is connected to the phosphating liquid return water tank through a pipe, and the outlet of the circulation pump is connected to the upper and lower phosphating liquid spray pipes through pipes respectively.

8. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The second washing tank includes a second washing tank body. A second washing upper spray pipe with downward-facing nozzles is installed inside the second washing tank body. A second washing lower spray pipe with upward-facing nozzles is installed below the second washing upper spray pipe. A conveyor chain on a chain conveyor passes through the area between the second washing upper spray pipe and the second washing lower spray pipe. A second washing return water tank is installed inside the second washing tank body below the second washing lower spray pipe. A circulation pump is installed on one side of the second washing return water tank. The inlet of the circulation pump is connected to the second washing return water tank through a pipe, and the outlet of the circulation pump is connected to the second washing lower spray pipe and the second washing upper spray pipe through pipes respectively.

9. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The pure water rinsing tank includes a pure water rinsing tank body. An upper pure water spray pipe with downward-facing nozzles is installed inside the pure water rinsing tank body. A lower pure water spray pipe with upward-facing nozzles is installed below the upper pure water spray pipe. A conveyor chain on a chain conveyor passes through the area between the upper and lower pure water spray pipes. A pure water return tank is installed inside the pure water rinsing tank body below the lower pure water spray pipe. A circulation pump is installed on one side of the pure water return tank. The inlet of the circulation pump is connected to the pure water return tank through a pipe, and the outlet of the circulation pump is connected to the upper and lower pure water spray pipes through pipes respectively.

10. The automotive filter housing pre-coating surface treatment production line as described in claim 1, characterized in that: The top of the pre-degreasing treatment box and the main degreasing treatment box are equipped with a first water mist exhaust device, and the top of the silane treatment box, surface conditioning treatment box, phosphating treatment box, second water washing box and pure water rinsing box are equipped with a second water mist exhaust device.

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