Method for removing drawing oil from structural part

Abstract

The invention aims to provide the method for removing the drawing oil from the structural part, which is low in cost, safe, reliable and environment-friendly, can thoroughly clean the surface of the cleaned part and does not damage the structural part. The method comprises the following steps: a, spraying the structural part with high-temperature water at 40-50 DEG C for 30 seconds; b, completely soaking the structural part showered in the step a in fine bubble water for 3-5 minutes; c, continuously spraying the structural part soaked in the step b with the fine bubble water for 40-80 seconds; d, the structural part treated in the step c is completely placed in pure water provided with an ultrasonic device to be subjected to ultrasonic cleaning for 20-40 s; and e, the structural part treated in the step d is dried, and after water on the surface of the structural part is dried, the cleaned structural part is obtained. The invention can be applied to the technical field of cleaning.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning, and in particular to a method for removing tensile oil from a structural part. Background Art

[0002] Stretching oil is a lubricating oil added to structural parts such as various 3C product shells during the processing process. The addition of stretching oil can prevent the structural parts from being scratched or injured during the processing process, such as stretching, stamping, calendering, drawing, tapping, rolling and other processes. After the processing is completed, the stretching oil attached to the structural parts needs to be removed before the structural parts can be packaged and shipped. At present, the stretching oil is generally removed by cleaning, and the mainstream cleaning agent used is hydrocarbon cleaning agent. Although hydrocarbon cleaning agents have the characteristics of good mineral cleaning effect, no residue after drying, and easy use, they also have the following shortcomings: hydrocarbon cleaning agents have high boiling points and low flash points, and are flammable items. When operating, operators need to strictly follow safety and management rules. In case of improper use, it is very easy to cause serious accident consequences. In addition, although hydrocarbon cleaning agents can be recovered by vacuum distillation, the energy consumption of drying is high, resulting in high costs. In addition, the sewage generated after the use of hydrocarbon cleaning agents needs to be treated and qualified before it can be discharged, which further increases its use cost.

[0003] In view of this, it is urgent to design a new cleaning method to circumvent the existing technical defects. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for removing tensile oil from structural parts which is low in cost, safe, reliable, environmentally friendly, can thoroughly clean the surface of the cleaned parts and does not damage the structural parts.

[0005] The technical solution adopted by the present invention is a method for removing tensile oil from a structural part, the method comprising the following steps: Step a. Rinse the structural parts with high-temperature water at 40-50°C for 30 seconds; Step b. completely immerse the structural member rinsed in step a into the fine bubble water for 3 to 5 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 40 to 80 seconds; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 20 to 40 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0006] More specifically, Step a. Rinse the structural parts with 40°C hot water for 30 seconds; Step b. completely immerse the structural member after the shower in step a into the fine bubble water for 5 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 80s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 40 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0007] Alternatively, step a. rinse the structural parts with 45°C high temperature water for 30 seconds; Step b. completely immerse the structural member rinsed in step a into the fine bubble water for 4.5 min; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 70s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 35 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0008] Or, Step a. Rinse the structural parts with 50°C hot water for 30 seconds; Step b. completely immerse the structural member after the shower in step a into the fine bubble water for 4 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 60s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 30 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0009] Further, The high temperature water in step a is pure high temperature water.

[0010] The micro-bubble water is oxygen micro-bubble water, ozone micro-bubble water or oxygen-ozone mixed micro-bubble water, and the micro-bubble water is obtained by mixing oxygen, ozone or a mixture of oxygen and ozone with pure water.

[0011] The concentration of oxygen, ozone or a mixture of the two mixed with pure water is 150mg / L to 220mg / L.

[0012] In the step e, the structural component is dried in a nitrogen low-temperature atmosphere or a vacuum low-temperature environment.

[0013] The structural member is a metal structural member.

[0014] Metal structural parts include aluminum structural parts, aluminum alloy structural parts, copper structural parts, and stainless steel structural parts.

[0015] The beneficial effect of the present invention is that, in the present invention, the structural parts are rinsed with high-temperature water to pre-clean the structural parts and enhance the molecular activity of the stretching oil on the surface of the structural parts; then the structural parts are immersed in micro-bubble water. After testing, it is found that the micro bubbles in the micro-bubble water can exist in the water for more than 7 days. Each bubble surface in the micro-bubble water carries an electric charge. The volume of the micro-bubbles in the water continues to decrease due to the water pressure. The surface charge of the micro-bubbles continues to concentrate as the bubbles shrink. When the micro-bubbles cannot withstand the water pressure, they burst. At this time, a large number of carboxyl free radicals are generated, and the potential of the charge of the free radicals is released. The voltage difference is used to adsorb the stretching oil on the surface of the structural parts, thereby completely adsorbing and taking away the stretching oil on the surface of the structural parts. At the same time, the micro-bubbles adsorb fatty acids according to the hydrophilic interaction force and adhere to the solid surface, thereby forming an oxide layer on the surface of the structural parts, thereby preventing secondary pollution, so that the surface of the cleaned parts is thoroughly cleaned without damaging the structural parts; in addition, in the present invention, the micro-bubble water can be prepared by using a set of micro-bubble water generating devices, and the cost is low enough; in addition, compared with the prior art, the micro-bubble water in the present invention is pollution-free, non-flammable, safe and reliable, and does not require the addition of chemicals. The process is environmentally friendly and clean, and the stretching oil is oxidized into other oxides after being separated from the structural parts. The relevant oxides can be removed by filtering and the like, and there is no need to set up a subsequent sewage treatment process, which further reduces the cost.

[0016] Furthermore, the concentration of oxygen, ozone or a mixture of the two mixed with pure water is 150mg / L to 220mg / L. Here, the concentration and volume of the mixed gas are changed according to the process requirements, so as to meet the cleaning requirements of structural parts under different conditions, thereby improving the application scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a simple flow chart of the method of the present invention; Figure 2 It is a simplified structural schematic diagram of a micro-bubble water generating device for preparing micro-bubble water; Figure 3 It is a simplified structural schematic diagram of the sprinkler head. DETAILED DESCRIPTION

[0018] like Figure 1 and Figure 2 As shown, the method of the present invention comprises the following steps: Step a. Rinse the structural parts with high-temperature water at 40-50°C for 30 seconds; Step b. completely immerse the structural member rinsed in step a into the fine bubble water for 3 to 5 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 40 to 80 seconds; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 20 to 40 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0019] The high-temperature water in step a is pure water and high-temperature water. The micro-bubble water is oxygen micro-bubble water, ozone micro-bubble water or oxygen-ozone mixed micro-bubble water, and the micro-bubble water is obtained by mixing oxygen, ozone or a mixture of oxygen and ozone with pure water. The concentration of oxygen, ozone or a mixture of the two mixed with pure water is 150mg / L~220mg / L. In the present invention, oxygen is mixed in, and finally oxygen micro-bubble water is formed. The micro-bubble water generating device must control the ratio and number of micron bubbles and nano bubbles, and synchronously needs to complete the control and adjustment of the output pressure to ensure the cleaning effect. In this embodiment, the ratio of micron bubbles to nano bubbles is limited to 1:40~1:80, the number of micron bubbles is about 2200~3800 / ml, and the number of nano bubbles is about 300,000~1 million / ml. In the method of the present invention, when showering or soaking, the pressure of the shower head is controlled to be about 0.37~0.45 MPa. When showering, showering can be done manually or through automatic settings.

[0020] In the step e, the structural parts are dried in a nitrogen low-temperature atmosphere or a vacuum low-temperature environment. In the specific implementation, the temperature is controlled at 40-80°C, and whether to use a nitrogen atmosphere or a vacuum environment is determined according to the specific material requirements of the structural parts. In addition, the temperature is adjusted according to the beat requirements. When it is necessary to shorten the drying time, the drying speed can be increased by increasing the drying temperature; in addition, according to different materials, a temperature suitable for the material is set to carry out the drying operation to ensure that the drying process will not cause adverse effects or damage to the structural parts themselves.

[0021] The structural parts are metal structural parts, such as aluminum structural parts, aluminum alloy structural parts, copper structural parts, and stainless steel structural parts.

[0022] When the above method is implemented, the steps are as follows: Step a. Rinse the structural parts with 40°C hot water for 30 seconds; Step b. completely immerse the structural member after the shower in step a into the fine bubble water for 5 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 80s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 40 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0023] Alternatively, the specific steps are as follows: Step a. Rinse the structural parts with 45°C hot water for 30 seconds; Step b. completely immerse the structural member rinsed in step a into the fine bubble water for 4.5 min; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 70s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 35 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0024] Alternatively, the specific steps are as follows: Step a. Rinse the structural parts with 50°C hot water for 30 seconds; Step b. completely immerse the structural member after the shower in step a into the fine bubble water for 4 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 60s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 30 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

[0025] In the present invention, microbubble water cleaning utilizes microbubble technology and uses a microbubble generating device to generate microbubbles as the main cleaning medium to complete the relevant process implementation.

[0026] The micro-bubble water involved in the above method steps is produced by a micro-bubble water generating device. The micro-bubble water generating device includes a pure water tank 11, a gas source 12 (including oxygen, ozone or a mixture of the two), a transfer pump 13 and a spray head 15 arranged in a cleaning container 14. The pure water tank 11 and the gas source 12 respectively send out pure water and gas, which pass through the transfer pump 13 and then enter the spray head 15 located in the cleaning container 14. The spray head 15 sprays the water-gas mixture into the cleaning container 14. The micro-bubble water generating device generates micro-bubble water by passing gas into ultrapure water. The bubble diameter range of the micro-bubble water is 100nm to 50μm. Specifically, the transfer pump 13 is a diaphragm pump, which is a volumetric pump. Here, the diaphragm of the diaphragm pump is formed of fluororesin, thereby effectively preventing the micro-bubble water from being contaminated by metal. Figure 3 As shown, the shower head 15 includes a hollow and cylindrical shell 151, an input tube cavity 152 coaxially arranged with the shell 151 and fixedly adapted at the end, and a first through hole 153 is arranged on the side wall of one end of the shell 151 to connect the inside and outside of the input tube cavity 152, and a first pressure release chamber 154 is formed in the input tube cavity 152 and in the area close to the first through hole 153, and a plurality of second through holes 155 are arranged on the wall surface of the shell 151 to connect the inside and outside of the shell 151, and a second pressure release chamber 156 is formed in the area close to the second through hole 155 in the shell 151. The water-gas mixture is sequentially separated into liquid through the first pressure chamber 154 and the second pressure chamber 156, generating more fine bubbles and improving the cleaning ability.

[0027] Specifically, the present invention performs a stretching oil removal operation on a mobile phone battery shell using the above-mentioned scheme.

[0028] The battery shell is rinsed with 50°C high-temperature water for 30 seconds; the battery shell is completely immersed in micro-bubble water for 4 minutes; the soaked battery shell is sprayed with micro-bubble water for 60 seconds; the battery shell is completely immersed in pure water equipped with an ultrasonic device for ultrasonic cleaning for 30 seconds; finally, the battery shell is dried to dry the moisture on the surface of the battery shell to obtain a cleaned battery shell.

[0029] The battery shell was tested after cleaning, and the results showed that the mobile phone battery shell can be basically cleaned. After the dynby test, 28 / 32 / 36 met the standards, and the foggy residue remaining on the visual surface disappeared.

[0030] Analysis of this embodiment shows that: 1. The cleaning effect of micro-bubble water lies in the total area of ​​micro-bubbles. Micro-bubbles absorb fatty acids and guard the solid surface through hydrophilic interaction; 2. The interfacial tension of double distilled water and fine bubble water is 57.9 degrees and 49.5 degrees respectively. Fine bubble water has stronger lubricity and lower interfacial tension; 3. The sludge load of fine bubble water can be increased by 2 times. The smaller the viscosity and roughness of the oil, the more obvious the cleaning effect. 4. The sludge load of fine bubble water on oil pollution under the acidity and neutralization standards is twice that of pure water; 5. In the process of using fine bubble water to remove the tensile oil on the surface of metal structural parts, it is found that a large number of bubbles merge and expand in the white edge filling liquid, and absorb the tensile oil to the surface of the bubbles and then separate upward, thereby achieving the cleaning effect.

[0031] The present invention can be used to remove the stretching oil on the surface of the structural parts of 3C products such as automobiles, computers, and mobile phones. Such as new energy vehicle battery shells, mobile phone battery shells, computer battery shells, etc. Or other cleaning operations after various metal structural parts are processed by stamping, cutting, and stretching. After cleaning by the method of the present invention, a purification film can be formed on the surface of the structural parts to prevent the structural parts from being contaminated again.

[0032] The core of the present invention is to use the special function and ability of micro-bubbles to complete the relevant process. The technical ability of using oxygen / ozone micro-bubbles to remove oil is mainly constrained by the number / concentration / ratio of micro-bubbles / nano-bubbles. The synchronous cleaning water temperature / cleaning time / ultrasonic intensity can be adjusted and changed with the change of micro-bubbles. The present invention is also applicable to the equipment modification of cleaning and stretching oil of various structural parts.

[0033] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for removing tensile oil from a structural part, characterized in that: The method comprises the following steps: Step a. Rinse the structural parts with high-temperature water at 40-50°C for 30 seconds; Step b. completely immerse the structural member rinsed in step a into the fine bubble water for 3 to 5 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 40 to 80 seconds; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 20 to 40 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

2. A method for removing tensile oil from a structural part according to claim 1, characterized in that: The method comprises the following steps: Step a. Rinse the structural parts with 40°C hot water for 30 seconds; Step b. completely immerse the structural member after the shower in step a into the fine bubble water for 5 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 80s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 40 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

3. A method for removing tensile oil from a structural part according to claim 1, characterized in that: The method comprises the following steps: Step a. Rinse the structural parts with 45°C hot water for 30 seconds; Step b. completely immerse the structural member rinsed in step a into the fine bubble water for 4.5 min; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 70s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 35 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

4. A method for removing tensile oil from a structural part according to claim 1, characterized in that: The method comprises the following steps: Step a. Rinse the structural parts with 50°C hot water for 30 seconds; Step b. completely immerse the structural member after the shower in step a into the fine bubble water for 4 minutes; Step c. Continue to spray the structural parts soaked in step b with fine bubble water for 60s; Step d. completely placing the structural member treated in step c into pure water provided with an ultrasonic device for ultrasonic cleaning for 30 seconds; Step e. Drying the structural part treated in step d to dry the moisture on the surface of the structural part to obtain a cleaned structural part.

5. A method for removing tensile oil from a structural part according to any one of claims 1 to 4, characterized in that: The high-temperature water in step a is purified high-temperature water.

6. A method for removing tensile oil from a structural part according to any one of claims 1 to 4, characterized in that: The micro-bubble water is oxygen micro-bubble water, ozone micro-bubble water or oxygen-ozone mixed micro-bubble water, and the micro-bubble water is obtained by mixing oxygen, ozone or a mixture of oxygen and ozone with pure water.

7. A method for removing tensile oil from a structural part according to claim 6, characterized in that: The concentration of oxygen, ozone or a mixture of the two mixed with pure water is 150 mg / L to 220 mg / L.

8. A method for removing tensile oil from a structural part according to any one of claims 1 to 4, characterized in that: In the step e, the structural component is dried in a nitrogen low-temperature atmosphere or a vacuum low-temperature environment.

9. A method for removing tensile oil from a structural part according to any one of claims 1 to 4, characterized in that: The structural member is a metal structural member.

10. A method for removing tensile oil from a structural part according to claim 9, characterized in that: Metal structural parts include aluminum structural parts, aluminum alloy structural parts, copper structural parts, and stainless steel structural parts.

Images