Soaking rust-proof treatment process and equipment for household appliance accessories

Abstract

The invention discloses a household appliance accessory soaking rust-proof treatment process and equipment, and the household appliance accessory soaking rust-proof treatment process comprises the following steps: S1, pretreatment: performing degreasing, rinsing, surface conditioning and deionized water washing on a to-be-treated household appliance metal accessory to obtain a clean and activated metal surface; s2, composite soaking is conducted, specifically, the pretreated accessory is soaked in water-based bionic composite silane sol with the temperature being 38-42 DEG C, soaking is conducted for 120-180 seconds under the composite disturbance condition, and composite disturbance comprises axial ultrasonic oscillation and radial mechanical stirring; and S3, follow-up treatment is conducted, specifically, centrifugal liquid draining, medium-temperature pre-curing and high-temperature final curing are sequentially conducted on the dipped accessories. According to the invention, the antirust performance and self-repairing capability of household appliance accessories can be greatly improved, by introducing flexible silane and hybrid resin, a film layer has excellent toughness and adhesive force while maintaining high hardness, and can tolerate subsequent processing processes such as stamping and bending without being damaged, and the whole production process is pollution-free.

Description

Technical Field

[0001] This invention belongs to the field of metal surface treatment technology, specifically relating to a process and equipment for immersion rust prevention treatment of household appliance parts. Background Technology

[0002] Metal components in home appliances, such as screws, brackets, inner cylinders, and motor housings, are highly susceptible to corrosion and rust due to humid environments during production, storage, and use, affecting the product's appearance, performance, and even safety. Currently, common rust prevention processes include coating with rust-preventive oil, phosphating, and electroplating. However, these traditional processes have the following significant drawbacks:

[0003] 1. Poor environmental performance: Phosphating process generates wastewater containing phosphorus and heavy metals, while electroplating causes cyanide and chromium pollution problems, resulting in significant environmental pressure.

[0004] 2. Limited performance: Traditional rust-preventive oils are prone to dust accumulation and lack the ability to self-repair scratches. Once the coating is damaged, corrosion will spread rapidly from the damaged area.

[0005] 3. Complex processes and high energy consumption: Electroplating, phosphating and other processes require multiple steps, involving heating and energy consumption, resulting in high costs.

[0006] 4. Poor compatibility with subsequent processes: Surfaces with anti-rust oil are not conducive to subsequent painting, bonding and other processes.

[0007] In recent years, silane treatment technology has been developed as an alternative to phosphating. However, existing silane technologies still have problems such as insufficient film toughness, limited corrosion resistance life, uneven treatment of complex workpieces, and lack of active protection after damage.

[0008] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a process and equipment for immersion rust prevention treatment of household appliance parts.

[0009] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0010] The purpose of this invention is to provide a process and equipment for immersion rust prevention treatment of household appliance parts, which can solve the problems of short rust prevention cycle, lack of self-repair function, poor environmental performance and uneven treatment in the prior art.

[0011] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0012] A process for immersion rust prevention treatment of household appliance parts includes the following steps:

[0013] S1. Pretreatment: Degreasing, rinsing, surface conditioning and deionized water washing are performed on the metal parts of the household appliances to be treated to obtain a clean and activated metal surface.

[0014] S2. Composite Immersion: Immerse the pretreated parts in an aqueous biomimetic composite silane sol at a temperature of 38-42℃ for 120-180 seconds under composite disturbance conditions, wherein the composite disturbance includes axial ultrasonic vibration and radial mechanical stirring.

[0015] S3. Subsequent processing: The impregnated parts are subjected to centrifugal drainage, medium-temperature pre-curing and high-temperature final curing in sequence to form the biomimetic self-healing anti-rust film.

[0016] In one or more embodiments of the present invention, in S2, the aqueous biomimetic composite silane sol comprises, by mass fraction, the following components: γ-glycidyl etheroxypropyltrimethoxysilane 4-6%, bis-[3-(triethoxy)silylpropyl]tetrasulfide 3-5%, aminated nano-silica sol 4-6%, sodium molybdate 0.8-1.2%, benzotriazole 0.2-0.4%, aqueous polyurethane-acrylic hybrid 3-5%, ethanolamine 0.5-1%, and the balance being deionized water, wherein the pH value of the aqueous biomimetic composite silane sol is 9.0-9.5.

[0017] In one or more embodiments of the present invention, step S3 specifically includes the following steps:

[0018] S301. First, centrifuge at 80-120 r / min for 20-30 seconds, then increase the speed to 280-320 r / min and centrifuge for 30-40 seconds.

[0019] S302, cure in a hot air environment of 80-90℃ for 5-8 minutes, and then cure in a hot air environment of 120-130℃ for 8-12 minutes.

[0020] A device for immersion rust prevention treatment of household appliance parts includes an immersion tank. The immersion tank is used in the aforementioned immersion rust prevention treatment process for household appliance parts. The immersion tank includes a tank body, an ultrasonic transducer array, a stirring mechanism, a heating coil, and a lifting mechanism. The top of the tank body has an opening. The ultrasonic transducer array is installed on the bottom wall of the tank body. The stirring mechanism is installed in the tank body for mechanically stirring an aqueous biomimetic composite silane sol. The heating coil is installed on the inner side wall of the tank body for heating the aqueous biomimetic composite silane sol. The lifting mechanism includes a support, a lifting cylinder, a basket, and an auxiliary stirring mechanism. The support is fixedly connected to the tank body, the lifting cylinder is installed on the support, the basket is connected to the free end of the lifting cylinder and can pass through the opening into the tank body, and the auxiliary stirring mechanism is installed on the basket to assist in the immersion of the household appliance parts.

[0021] In one or more embodiments of the present invention, an observation plate is provided on the side wall of the tank, a liquid exchange pipe is connected to the tank, and a control valve is installed on the liquid exchange pipe.

[0022] In one or more embodiments of the present invention, the stirring mechanism includes a pair of stirring shafts, a plurality of stirring plates, a pair of pulleys, a belt, and a motor. The pair of stirring shafts are rotatably connected to the tank body. The plurality of stirring plates are respectively connected to one end of the pair of stirring shafts located inside the tank body. The pair of pulleys are respectively connected to one end of the pair of stirring shafts located outside the tank body. The belt is connected between the pair of pulleys. The motor is mounted on the outer wall of the tank body and connected to one of the stirring shafts.

[0023] In one or more embodiments of the present invention, the frequency of the ultrasonic transducer array is 45kHz, and the speed of the motor is 50-70rpm.

[0024] In one or more embodiments of the present invention, the auxiliary stirring mechanism includes a fixing member, a support plate, a piston portion, a sliding plate, a linkage rod, a telescopic hose, and a spring. The fixing member is fixedly connected to the lower bottom wall of the suspended basket. The support plate is connected to the fixing member and disposed within the suspended basket; the support plate is hollow internally, and its upper bottom wall has multiple through holes. The piston portion is connected to the fixing member and disposed outside the suspended basket. The sliding plate is slidably disposed within the piston portion. The linkage rod is fixedly connected to the sliding plate, and one end passes through the piston portion; the fixing member and the linkage rod have interconnected channels. The telescopic hose is disposed within the piston portion and connected to the sliding plate; the telescopic hose communicates with the channels. The spring is disposed within the piston portion and surrounds the telescopic hose.

[0025] In one or more embodiments of the present invention, a stirring impeller is rotatably connected to the side wall of the linkage rod, and an extension is connected to the end of the linkage rod.

[0026] In one or more embodiments of the present invention, a cover plate is connected to the free end of the lifting cylinder, and the cover plate can cover the opening.

[0027] Compared with the prior art, the immersion rust prevention treatment process and equipment for household appliance parts of the present invention can significantly improve the rust prevention performance and self-repair capability of household appliance parts. By introducing flexible silane and hybrid resin, the film layer maintains high hardness while possessing excellent toughness and adhesion, and can withstand subsequent stamping, bending and other processing processes without damage, and the entire production process is pollution-free. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a flowchart of an immersion rust prevention treatment process for household appliance parts according to one embodiment of the present invention;

[0030] Figure 2 This is a perspective view of an impregnation tank according to an embodiment of the present invention;

[0031] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle;

[0032] Figure 4 This is a cross-sectional view of the impregnation tank in one embodiment of the present invention;

[0033] Figure 5 for Figure 4 Schematic diagram of the structure at point B;

[0034] Figure 6 This is a schematic diagram of the structure of the impregnation tank in one embodiment of the present invention;

[0035] Figure 7 for Figure 6 Schematic diagram of the structure at point C.

[0036] Explanation of key figure labels:

[0037] 1-Tank body, 101-Observation plate, 102-Liquid changing pipe, 2-Ultrasonic vibrating plate array, 3-Stirring mechanism, 301-Stirring shaft, 302-Stirring plate, 303-Pulley, 304-Belt, 305-Motor, 4-Heating coil, 5-Lifting mechanism, 501-Bracket, 502-Lifting cylinder, 503-Basket, 504-Auxiliary stirring mechanism, 5041-Fixed component, 5042-Support plate, 5043-Piston part, 5044-Slide plate, 5045-Linkage rod, 5046-Telescopic hose, 5047-Spring, 5048-Stirring impeller, 5049-Extension part, 505-Cover plate. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a process for immersion rust prevention treatment of household appliance parts, which includes the following steps:

[0040] S1. Pretreatment: Degreasing, rinsing, surface conditioning and deionized water washing are performed on the metal parts of the household appliances to be treated to obtain a clean and activated metal surface.

[0041] S2. Composite Immersion: Immerse the pretreated parts in an aqueous biomimetic composite silane sol at a temperature of 38-42℃ for 120-180 seconds under composite disturbance conditions, which include axial ultrasonic vibration and radial mechanical stirring.

[0042] S3. Post-treatment: The impregnated parts are subjected to centrifugal drainage, medium-temperature pre-curing and high-temperature final curing in sequence to form a biomimetic self-healing anti-rust film.

[0043] The entire process of this application is short, mainly carried out at room temperature or medium and low temperature, and the energy consumption is significantly lower than that of electroplating and high-temperature phosphating. Continuous mass production can be achieved through automated equipment.

[0044] In S2, the aqueous biomimetic composite silane sol comprises the following components by mass fraction: 4-6% γ-glycidyl etheroxypropyltrimethoxysilane, 3-5% bis-[3-triethoxysilylpropyl]tetrasulfide, 4-6% aminated nano-silica sol, 0.8-1.2% sodium molybdate, 0.2-0.4% benzotriazole, 3-5% aqueous polyurethane-acrylic hybrid, 0.5-1% ethanolamine, with the balance being deionized water. The pH value of the aqueous biomimetic composite silane sol is 9.0-9.5. This application uses an aqueous silane system, completely replacing the traditional phosphating and passivation processes, fundamentally eliminating heavy metal pollution such as phosphorus and chromium. Wastewater treatment is simple and meets the requirements of green manufacturing. The silane membrane forms a strong Si-O-Me covalent bond with the metal substrate, while the nano-silica particles fill the micropores of the membrane layer, forming a dense physical barrier. Neutral salt spray testing can achieve more than 720 hours without white rust. When the film layer is scratched due to mechanical damage, the molybdate and benzotriazole in the formula will preferentially adsorb and complex at the damaged area to form a new protective film, effectively inhibiting the spread of corrosion. The formed silane film has an organic-inorganic hybrid structure, which has excellent adhesion to subsequent paints and powder coatings, solving the problem of reduced coating adhesion caused by traditional rust-preventive oils.

[0045] In this embodiment, S3 specifically includes the following steps:

[0046] S301. First, centrifuge at 80-120 r / min for 20-30 seconds, then increase the speed to 280-320 r / min and centrifuge for 30-40 seconds.

[0047] S302, cure in a hot air environment of 80-90℃ for 5-8 minutes, and then cure in a hot air environment of 120-130℃ for 8-12 minutes.

[0048] like Figures 2 to 7As shown, a device for immersion rust prevention treatment of household appliance parts includes an immersion tank, which comprises a tank body 1, an ultrasonic transducer array 2, a stirring mechanism 3, a heating coil 4, and a lifting mechanism 5. The top of the tank body 1 has an opening. The ultrasonic transducer array 2 is installed on the inner bottom wall of the tank body 1. The stirring mechanism 3 is installed inside the tank body 1 for mechanically stirring an aqueous biomimetic composite silane sol. The heating coil 4 is installed on the inner side wall of the tank body 1 for heating the aqueous biomimetic composite silane sol. The lifting mechanism 5 includes a support 501, a lifting cylinder 502, a basket 503, and an auxiliary stirring mechanism 504. The support 501 is fixedly connected to the tank body 1, the lifting cylinder 502 is installed on the support 501, the basket 503 is connected to the free end of the lifting cylinder 502 and can pass through the opening into the tank body 1, and the auxiliary stirring mechanism 504 is installed on the basket 503 for assisting in the immersion of household appliance parts. The ultrasonic transducer array 2 generates an axial sound field perpendicular to the surface of the appliance components, utilizing cavitation to clean the surface and promote molecular transport. The stirring mechanism 3 generates a radial flow field in the horizontal direction, which couples with the sound field to form a three-dimensional composite disturbance. The heating coil 4 precisely maintains the temperature of the water-based biomimetic composite silane sol. The lifting mechanism 5 is program-controlled to achieve precise and slow lifting of the basket 503 during the immersion process, facilitating the removal of air bubbles and the renewal of liquid within the appliance component cavity.

[0049] The appliance parts are placed inside the basket 503. The basket 503 can be precisely raised and lowered, and the appliance parts can be soaked, by extending and retracting the lifting cylinder 502. Combined with the ultrasonic transducer array 2, the stirring mechanism 3, and the raising and lowering of the basket 503, the treatment solution can fully penetrate every crevice and blind hole of the appliance parts, ensuring uniform treatment.

[0050] In this example, tank 1 is made of stainless steel and covered with an insulation layer.

[0051] The tank 1 has an observation plate 101 on its side wall, and a liquid replacement pipe 102 connected to the tank 1, with a control valve installed on the liquid replacement pipe 102. The observation plate 101 is used to observe the immersion status of household appliance parts in the tank 1. The liquid replacement pipe 102 is used to replace the water-based biomimetic composite silane sol in the tank 1.

[0052] like Figures 2 to 7 As shown, the stirring mechanism 3 includes a pair of stirring shafts 301, multiple stirring plates 302, a pair of pulleys 303, a belt 304, and a motor 305. The pair of stirring shafts 301 are rotatably connected to the tank 1. The multiple stirring plates 302 are respectively connected to one end of the pair of stirring shafts 301 located inside the tank 1. The pair of pulleys 303 are respectively connected to one end of the pair of stirring shafts 301 located outside the tank 1. The belt 304 connects the pair of pulleys 303. The motor 305 is mounted on the outer wall of the tank 1 and connected to one of the stirring shafts 301.

[0053] When the motor 305 is running, it drives one of the stirring shafts 301 to rotate. Through the pulley 303 and belt 304, a pair of stirring shafts 301 can rotate synchronously, causing the stirring plate 302 to rotate within the tank 1. This mechanically stirs the water-based biomimetic composite silane sol, ensuring the soaking effect of the appliance parts. Combined with the ultrasonic transducer array 2, the soaking effect of the appliance parts can be significantly improved.

[0054] Preferably, the ultrasonic transducer array 2 has a frequency of 45kHz, and the motor 305 has a speed of 50-70rpm.

[0055] like Figures 2 to 7 As shown, the auxiliary stirring mechanism 504 includes a fixing member 5041, a support plate 5042, a piston part 5043, a sliding plate 5044, a linkage rod 5045, a telescopic hose 5046, and a spring 5047. The fixing member 5041 is fixedly connected to the lower bottom wall of the basket 503. The support plate 5042 is connected to the fixing member 5041 and is located inside the basket 503. The support plate 5042 is hollow inside, and its upper bottom wall has multiple through holes. The piston part 5043 is connected to the fixing member 5041 and is located outside the basket 503. The sliding plate 5044 is slidably disposed inside the piston part 5043. The linkage rod 5045 is fixedly connected to the sliding plate 5044, and one end passes through the piston part 5043. The fixing member 5041 and the linkage rod 5045 have interconnected channels. The telescopic hose 5046 is located inside the piston portion 5043 and is connected to the slide plate 5044. The telescopic hose 5046 is connected to the channel. The spring 5047 is located inside the piston portion 5043 and surrounds the telescopic hose 5046.

[0056] When the suspended basket 503 is raised and lowered in the tank 1, the water-based biomimetic composite silane sol in the tank 1 enters the channel and enters the support plate 5042 through the telescopic hose 5046. Then, it is sprayed into the home appliance parts in the suspended basket 503 through the through hole to soak the side of the home appliance parts that is in contact with the support plate 5042, which greatly improves the soaking uniformity of the home appliance parts.

[0057] The linkage rod 5045 is rotatably connected to a stirring impeller 5048 on its side wall, and an extension part 5049 is connected to the end of the linkage rod 5045. When the basket 503 rises, the stirring impeller 5048 is resisted by the water-based biomimetic composite silane sol, and the sliding plate 5044 moves within the piston part 5043, thereby causing the extension part 5049 to move away from the basket 503. At this time, the stirring impeller 5048 can rotate within the tank 1 to stir and mix the water-based biomimetic composite silane sol in the tank 1, ensuring the temperature uniformity of the water-based biomimetic composite silane sol. When the basket 503 descends, the extension part 5049 approaches the basket 503, and at the same time, the stirring impeller 5048 also rotates to mix the water-based biomimetic composite silane sol, and sprays the water-based biomimetic composite silane sol through the through hole into the appliance parts inside the basket 503 to soak the side of the appliance parts that contacts the support plate 5042.

[0058] In addition, a cover plate 505 is connected to the free end of the lifting cylinder 502. The cover plate 505 can cover the opening to prevent the water-based biomimetic composite silane sol in the tank 1 from overflowing during stirring.

[0059] Application examples

[0060] Ten washing machine drum supports made of 304 stainless steel. A 500L water-based biomimetic composite silane sol was prepared, with the pH adjusted to 9.2.

[0061] Pretreatment: The inner cylinder is treated in a degreasing solution at 55℃ for 8 minutes. Then, it is rinsed in two separate water tanks for 3 minutes each. Next, it is soaked in a 2% citric acid solution at room temperature for 2 minutes. Finally, it is high-pressure sprayed for 40 seconds, and the surface is visually inspected to show a continuous and complete water film.

[0062] Composite immersion: The appliance parts are placed in the basket 503, which enters the tank 1 under the action of the lifting cylinder 502. The temperature of the treatment solution is maintained at 40±1℃. The 45kHz ultrasonic wave is turned on, the stirring mechanism 3 is started and set to 60rpm, and the lifting cylinder 502 simultaneously raises and lowers the basket 503 at a frequency of 10 times / minute. The immersion time is set to 150 seconds.

[0063] Subsequent processing: First, rotate at 100 rpm for 25 seconds, then rotate at 300 rpm for 35 seconds. Cure at 85℃ for 7 minutes, then cure at 125℃ for 10 minutes.

[0064] Samples of the treated brackets were taken and subjected to a neutral salt spray test according to the national standard GB / T10125. The results showed that after 720 hours of salt spray testing, no red rust or white corrosion products appeared on the sample surface, and there was no significant corrosion at the scratches. The adhesion test using the cross-cut adhesion test showed a grade of 0. After being assembled into washing machines, these brackets maintained a good appearance and showed no rust even under long-term user monitoring in humid environments.

[0065] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A process for immersion rust prevention treatment of household appliance parts, characterized in that, Includes the following steps: S1. Pretreatment: Degreasing, rinsing, surface conditioning and deionized water washing are performed on the metal parts of the household appliances to be treated to obtain a clean and activated metal surface. S2. Composite Immersion: Immerse the pretreated parts in an aqueous biomimetic composite silane sol at a temperature of 38-42℃ for 120-180 seconds under composite disturbance conditions, wherein the composite disturbance includes axial ultrasonic vibration and radial mechanical stirring. S3. Subsequent processing: The impregnated parts are subjected to centrifugal drainage, medium-temperature pre-curing and high-temperature final curing in sequence to form the biomimetic self-healing anti-rust film.

2. The immersion rust prevention treatment process for household appliance parts according to claim 1, characterized in that, In S2, the aqueous biomimetic composite silane sol comprises, by mass fraction, the following components: γ-glycidyl etheroxypropyltrimethoxysilane 4-6%, bis-[3-silylpropyl]tetrasulfide 3-5%, aminated nano-silica sol 4-6%, sodium molybdate 0.8-1.2%, benzotriazole 0.2-0.4%, aqueous polyurethane-acrylic hybrid 3-5%, ethanolamine 0.5-1%, with the balance being deionized water. The pH value of the aqueous biomimetic composite silane sol is 9.0-9.

5.

3. The immersion rust prevention treatment process for household appliance parts according to claim 1, characterized in that, S3 specifically includes the following steps: S301. First, centrifuge at 80-120 r / min for 20-30 seconds, then increase the speed to 280-320 r / min and centrifuge for 30-40 seconds. S302, cure in a hot air environment of 80-90℃ for 5-8 minutes, and then cure in a hot air environment of 120-130℃ for 8-12 minutes.

4. A device for immersion rust prevention treatment of household appliance parts, comprising an immersion tank, wherein the immersion tank is used in the immersion rust prevention treatment process for household appliance parts as described in any one of claims 1-3, characterized in that, The impregnation tank includes: The tank body has an opening at its top; An ultrasonic transducer array is installed on the bottom wall of the tank. A stirring mechanism is installed in the tank for mechanically stirring the aqueous biomimetic composite silane sol. A heating coil is installed on the inner side wall of the tank for heating water-based biomimetic composite silane sol; The lifting mechanism includes a support, a lifting cylinder, a basket, and an auxiliary stirring mechanism. The support is fixedly connected to the tank body, the lifting cylinder is mounted on the support, the basket is connected to the free end of the lifting cylinder and can pass through the opening into the tank body, and the auxiliary stirring mechanism is mounted on the basket for assisting in the impregnation of household appliance parts.

5. The immersion rust prevention treatment equipment for household appliance parts according to claim 4, characterized in that, The tank is equipped with an observation plate on its side wall, and a liquid exchange pipe is connected to the tank, with a control valve installed on the liquid exchange pipe.

6. The immersion rust prevention treatment equipment for household appliance parts according to claim 4, characterized in that, The stirring mechanism includes: A pair of stirring shafts are rotatably connected to the tank body; Multiple stirring plates are respectively connected to one end of the pair of stirring shafts located inside the tank; A pair of pulleys are respectively connected to one end of the pair of stirring shafts located outside the tank; A belt, connecting the pair of said pulleys; An electric motor is mounted on the outer wall of the tank and connected to one of the stirring shafts.

7. The immersion rust prevention treatment equipment for household appliance parts according to claim 6, characterized in that, The ultrasonic transducer array has a frequency of 45kHz, and the motor speed is 50-70rpm.

8. The immersion rust prevention treatment equipment for household appliance parts according to claim 4, characterized in that, The auxiliary stirring mechanism includes: The fastener is fixedly connected to the bottom wall of the suspended basket; A support plate is connected to the fixing member and is located inside the basket. The support plate is hollow inside and has multiple through holes on its upper bottom wall. The piston part is connected to the fixing member and is located outside the basket; A sliding plate is slidably disposed within the piston section; A linkage rod is fixedly connected to the slide plate, and one end passes through the piston part. The fixing member and the linkage rod are provided with interconnected channels. A telescopic hose is disposed inside the piston section and connected to the slide plate; the telescopic hose is connected to the channel. A spring is disposed within the piston portion and surrounds the telescopic hose.

9. The immersion rust prevention treatment equipment for household appliance parts according to claim 8, characterized in that, The linkage rod is rotatably connected to a stirring impeller on its side wall, and an extension is connected to the end of the linkage rod.

10. The immersion rust prevention treatment equipment for household appliance parts according to claim 4, characterized in that, The free end of the lifting cylinder is connected to a cover plate, which can cover the opening.

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