A degreasing pretreatment cleaning line for electrostatic painting
By designing a degreasing pretreatment cleaning line before electrostatic coating, and using high-pressure water guns and air guns for 360° cleaning and drying, the problem of high cost of removing dust and oil stains from workpiece surfaces is solved, achieving low-cost and high-efficiency cleaning results.
Patent Information
- Application Number
- CN202521804794.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-25
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-25
AI Technical Summary
Before electrostatic coating, removing dust and oil from the workpiece surface is costly. Directly immersing the workpiece in the degreasing tank can contaminate the degreasing agent, leading to increased costs and frequent replacements.
Design a degreasing pretreatment cleaning line for electrostatic coating, including a cleaning tank, a pre-degreasing tank, a main degreasing tank, a neutralization tank, a surface cleaning tank, a phosphating tank, and a water washing tank on the production line. High-pressure water guns and high-pressure air guns are used for 360° cleaning and air drying, and an integrated stabilizer is used to keep the workpiece stable.
It effectively removes dust and oil stains from the surface of workpieces, reduces the amount of degreasing agent used, lowers costs, improves cleaning efficiency, keeps workpieces dry, and prevents skewing.
Smart Images
Figure CN224673305U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrostatic spraying production line technology, and in particular to a degreasing pretreatment cleaning line for electrostatic coating. Background Technology
[0002] Electrostatic coating is a highly efficient coating process that uses a high-voltage electrostatic field to charge the coating material and allow it to adhere to the surface of a workpiece. It is widely used in electronics, automobiles, and home appliances. Before electrostatic spraying, the workpiece needs to undergo a pre-treatment process of immersion degreasing and rust removal. This involves placing the entire workpiece in a cleaning tank via a workpiece basket to ensure the surface is free of oil and dust, thus improving adhesion during electrostatic coating. Immersion degreasing requires various degreasing agents, which is costly. Directly placing dusty workpieces into the degreasing tank can contaminate the degreasing agent, increasing its usage cost and the frequency of replacement. Therefore, a pre-treatment cleaning tank is necessary before degreasing. Utility Model Content
[0003] Therefore, it is necessary to provide a degreasing pretreatment cleaning line for electrostatic coating to address the above problems.
[0004] A degreasing pretreatment cleaning line for electrostatic coating includes a production line in a straight line. From left to right, the production line is equipped with a cleaning tank, a pre-degreasing tank, a main degreasing tank, a neutralization tank, a surface cleaning tank, a phosphating tank, and a washing tank. The cleaning tank is rectangular in shape. High-pressure water guns are installed on the left and right inner walls of the cleaning tank, and high-pressure air guns are installed on the front and rear inner walls of the cleaning tank. A turntable is installed at the bottom of the cleaning tank. The outlets of the high-pressure water guns and high-pressure air guns are inclined towards the turntable. A stabilizer for supporting the workpiece basket is installed at the corner of the cleaning tank.
[0005] Preferably, the stabilizer includes a fixed base, a connecting rod, and a pulley. The fixed base is installed at the corner of the cleaning tank. The rear end of the connecting rod is hinged to the fixed base, allowing the connecting rod to swing up and down around the fixed base. The front end of the connecting rod is movably connected to the pulley via a pin.
[0006] Preferably, a tension spring is also provided between the lower end of the fixed seat and the connecting rod, and the tension spring, the fixed seat, and the connecting rod form a triangle.
[0007] Preferably, a filter screen is also provided at the bottom of the cleaning tank.
[0008] The advantages of this utility model are: the cleaning tank is used to rinse and clean the workpiece to remove surface dust, and a high-pressure air gun is integrated for air drying to prevent water from being carried away. The straightener is used to maintain the state of the workpiece and prevent it from tilting. Attached Figure Description
[0009] Figure 1 One embodiment is a degreasing pretreatment cleaning line for electrostatic coating;
[0010] Figure 2 This is a schematic diagram of the centralizer structure. Detailed Implementation
[0011] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0012] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0014] like Figure 1As shown, a degreasing pretreatment cleaning line for electrostatic coating includes a production line 100, which is straight. From left to right, the production line 100 is equipped with a cleaning tank 1, a pre-degreasing tank 2, a main degreasing tank 3, a neutralization tank 4, a surface cleaning tank 5, a phosphating tank 6, and a water washing tank 7. The cleaning tank 1 is rectangular. High-pressure water guns 11 are installed on the left and right inner walls of the cleaning tank 1, and high-pressure air guns 12 are installed on the front and rear inner walls of the cleaning tank 1. A turntable 13 is installed at the bottom of the cleaning tank 1. The outlets of the high-pressure water guns 11 and the high-pressure air guns 12 are inclined towards the turntable 13. A stabilizer 14 for supporting the workpiece basket is provided at the corner of the cleaning tank 1. Specifically, in this embodiment, during cleaning, a rail (not shown in the figure) suspended on the production line 100 is used in conjunction with a robotic arm to sequentially place the workpiece basket into the cleaning tank 1, the pre-degreasing tank 2, the main degreasing tank 3, the neutralization tank 4, the surface cleaning tank 5, the phosphating tank 6, and the water washing tank 7 to complete the degreasing and cleaning work before electrostatic spraying. The degreasing tank contains an alkaline degreasing agent to initially remove oil stains from the workpiece surface. The main degreasing tank 3 contains a stronger alkaline degreasing agent (total alkalinity 9-20 points, free alkalinity 9-12 points) and a wetting agent. The neutralization tank 4 contains a weakly alkaline solution (such as sodium bicarbonate) to neutralize residual acid on the workpiece surface. The surface conditioning tank contains colloidal titanium or an acidic surface conditioning agent (such as oxalic acid) to activate the metal surface of the workpiece. The phosphating tank 6 contains a phosphate solution (zinc-based / iron-based) and an accelerator to form a dense phosphate film on the workpiece surface, enhancing coating adhesion and corrosion resistance. The rinsing tank contains clean water or deionized water to remove residual solution from the workpiece and prevent cross-contamination. To save on degreasing agent used during degreasing, a cleaning tank 1 is installed before the pre-degreasing tank 2 for cleaning the workpiece. The cleaning method is as follows: First, the workpiece basket is placed in the cleaning tank 1, specifically on the turntable 13. The turntable 13 rotates the workpiece basket, and the high-pressure water gun 11 begins operation, rinsing the workpiece. The rotating workpiece, combined with the high-pressure water gun 11, achieves 360° cleaning without dead angles, which is especially suitable for workpieces with complex structures. Furthermore, the water flow can more efficiently remove adhering substances from the workpiece surface with the help of centrifugal force, reducing cleaning time by 70% compared to static cleaning and improving cleaning efficiency. After the high-pressure water gun 11 finishes its operation, the high-pressure cylinder 12 begins operation, using high-speed airflow to rinse the workpiece, removing water from the workpiece surface and keeping it dry, thus achieving a drying effect. During cleaning and drying, the workpiece basket is always rotated by the turntable 13. To prevent the workpiece from tilting due to the high-speed airflow and water flow, a stabilizer 14 is integrated into the cleaning tank 1 to support the workpiece basket and keep it stable, preventing it from tipping over.
[0015] like Figure 2As shown, the stabilizer 14 includes a fixed base 141, a connecting rod 142, and a pulley 143. The fixed base 141 is installed at the corner of the cleaning tank 1. The rear end of the connecting rod 142 is hinged to the fixed base 141, allowing the connecting rod 142 to swing up and down around the fixed base 141. The front end of the connecting rod 142 is movably connected to the pulley 143 via a pin. Specifically, when the workpiece basket is placed in the cleaning tank 1, the outer surface of the workpiece basket contacts the pulley 143, and the connecting rod 142 is squeezed by the workpiece basket, rotating downward around the fixed base 141. This increases the distance between the two sets of pulleys 143 symmetrical about the central axis of the turntable 13, allowing the four sets of stabilizers 14 to effectively clamp the workpiece basket and prevent it from tilting during the rotational cleaning process.
[0016] like Figure 2 As shown, a tension spring is also provided between the lower end of the fixed seat 141 and the connecting rod 142. The tension spring, the fixed seat 141 and the connecting rod 142 form a triangle. When the workpiece basket is driven away from the cleaning tank 1 by the robot, the tension spring is used to prevent the connecting rod 142 from being driven upward by the workpiece basket and can be reset under the action of the tension spring.
[0017] Specifically, the bottom of the cleaning tank 1 is also equipped with a filter screen to filter dust and impurities washed off the workpiece, so as to avoid clogging the pipeline.
[0018] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A degreasing pretreatment cleaning line for electrostatic coating, comprising an assembly line, characterized in that: The production line is linear, and from left to right, it is equipped with a cleaning tank, a pre-degreasing tank, a main degreasing tank, a neutralization tank, a surface cleaning tank, a phosphating tank, and a washing tank. The cleaning tank is rectangular, with high-pressure water guns installed on the left and right inner walls and high-pressure air guns installed on the front and rear inner walls. A turntable is installed at the bottom of the cleaning tank, and the outlets of the high-pressure water guns and high-pressure air guns are inclined towards the turntable. A stabilizer is installed at the corner of the cleaning tank to support the workpiece basket.
2. The degreasing pretreatment cleaning line for electrostatic coating as described in claim 1, characterized in that: The stabilizer includes a fixed base, a connecting rod, and a pulley. The fixed base is installed at the corner of the cleaning tank. The rear end of the connecting rod is hinged to the fixed base, allowing the connecting rod to swing up and down around the fixed base. The front end of the connecting rod is movably connected to the pulley via a pin.
3. The degreasing pretreatment cleaning line for electrostatic coating as described in claim 2, characterized in that: A tension spring is also provided between the lower end of the fixed seat and the connecting rod, and the tension spring, the fixed seat and the connecting rod form a triangle.
4. The degreasing pretreatment cleaning line for electrostatic coating as described in claim 1, characterized in that: A filter screen is also installed at the bottom of the cleaning tank.