Application of the hottest ultrasonic cleaning tec

2022-08-26
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Shenzhen Ketai ultrasonic automation equipment Co., Ltd. is a large high-tech enterprise specializing in the production of surface treatment equipment integrating R & D, design, manufacturing, sales and service

the company is mainly engaged in ultrasonic cleaning equipment, pure water equipment, refrigeration equipment, electroplating equipment, ultrasonic welding equipment, automatic environmental protection equipment, etc. the products are widely used in electronics, machinery, automobile, aviation, clocks, glass, chemical fiber, optics, jewelry, bearings and other industries. The products sell well at home and abroad and are highly praised by users

the company has won the honorary titles of "member of China Cleaning Engineering Technology Association", Shenzhen "contract abiding and trustworthy enterprise", Shenzhen "excellent enterprise", etc. The company implements the ISO9001:2000 international quality management system certification, and responds to the call of the United Nations Development Programme to "eliminate ODS substances", and develops environmental protection products synchronized with international advanced technology. At present, the company has professional technical talents, mature market channels and good corporate reputation. In the future, the company will wholeheartedly provide excellent products and services to customers from all walks of life

Ketai always adheres to the enterprise philosophy of "integrity, professionalism and enthusiasm" and the business philosophy of "scientific and technological innovation, quality innovation and honest service", develops larger marketing channels, expands market share, excavates potential business opportunities, and develops and grows together with partners

the advantages of ultrasonic cleaning technology are well known by more and more surface treatment engineers in machinery, automobile, electronics, hardware and other industries. Its high-definition cleaning effect and fast production beat make the application of this technology expand rapidly. In the 1990s, the performance and application of ultrasonic cleaning technology have made breakthroughs; Large and continuous ultrasonic cleaning equipment has completely changed the image of traditional small equipment; The development of chemical products has greatly enriched the cleaning process, and new applications continue to expand in the field

ultrasonic brings more cleaning schemes that are beneficial to reducing environmental pollution... Ultrasonic cleaning technology needs to be re recognized by people

1 principle of ultrasonic cleaning

1.1 ultrasonic generator "other excited" ultrasonic wave generator (power supply), whose function is to convert 50Hz alternating current into high-frequency power output of more than 2000Hz through inverter circuit. The so-called "other excitation" means that the ultrasonic generator has a complete circuit control and protection system, which is suitable for continuous work; Its corresponding is the "self-excited" power supply, which has relatively simple circuit, low cost and poor reliability

1.2 piezoelectric crystals (piezoelectric ceramics) are sandwiched between the upper end of the ultrasonic transducer and the lower end of the transmitter. The commonly used piezoelectric ceramics are lead titanate zirconate. When a voltage is applied between the two poles of the piezoelectric ceramic, the geometric size of the ceramic will change. When a high-frequency AC voltage is applied, the ceramic will drive the whole transducer to do high-frequency reciprocating vibration, so as to send out high-power ultrasonic waves. Bonding a group of transducers to an emitting surface becomes an ultrasonic matrix (transducer box). Clean the container (waste), and the cleaned parts need to be immersed in the cleaning solution in the tank for cleaning. This constitutes a basic ultrasonic cleaning system

1.3 "cavitation" effect of ultrasonic wave the ultrasonic cleaning force mainly comes from "cavitation" effect. Intuitively speaking, when the transducer group vibrates at the same phase with high frequency, it is like a huge piston. When the vibration power is large enough (exceeding the threshold), the piston pulls countless tiny bubbles (cavitation bubbles) out of the liquid, and the reverse vibration makes them burst rapidly. The speed at which this cavity produces each fracture is so fast that it has extremely high motion acceleration (>200g) and blasting impact, Moreover, this "cavitation" effect is most likely to occur at the solid-liquid interface, which can quickly and thoroughly peel off the dirt attached to the surface of parts

2 process conditions of ultrasonic equipment

2.1 equipment: ultrasonic output must reach a certain intensity to produce cavitation. This intensity is measured by power density. The lowest density of this part of consumer demand shows that the rigidity should be greater than 0.35w/cm2, and the practical application mostly adopts 0.4 ~ 0.8w/cm2. Frequency: the frequency of industrial ultrasonic cleaning equipment is usually between 16 ~ 80kHz, and the commonly used frequencies include 20, 25, 28, 33, and 40KHz

2.2 process:

temperature: medium temperature (40 ~ 60 ℃) cleaning solution is generally used for ultrasonic cleaning: different cleaning solutions should be selected according to the cleaning object. Cleaning fluids include water-based cleaning fluids and solvent based cleaning fluids. At present, water-based cleaning fluid is more and more widely used: alkaline, neutral or acidic degreasing fluid can be used for oil removal; Weak acids such as phosphoric acid can be used to clean rust and oxide skin. Freon, trichloroethylene, gasoline, etc. are all good cleaning solvents. With the economic tension of the people in aerospace, national defense, kerosene chemical industry, transportation and other household property mediation, elimination and upgrading, but these substances either pollute the environment, poison human body, or are flammable and explosive, and their use is strictly limited. Altene D6, produced by Atochem in France, has passed the environmental certification of Europe and the United States, with excellent performance and great application value

3 why should ultrasonic cleaning be used?

compared with conventional cleaning methods, ultrasonic cleaning has incomparable advantages:

I fast speed: ultrasonic cleaning time can usually be completed within dozens of seconds to a few minutes

ⅱ high cleanliness

ⅲ is suitable for complex parts: the characteristics of sound waves make the holes, slits, inner walls, etc. of parts well handled

Ⅳ it is easy to adopt environmental friendly cleaning methods

4 practical application of ultrasonic cleaning equipment reliability can meet the requirements of mass production and the continuous improvement of the requirements for the surface cleanliness of parts. The role of these two aspects has always pursued a defensive national defense policy, which makes ultrasonic wave cleaning an ideal method for degreasing before electroplating, cleaning polishing paste after polishing, and removing oil and rust before coating. Moreover, the volume of parts of hardware products is generally small, and the equipment investment of ultrasonic cleaning is also relatively low

1: electronic and electrical appliances mainly clean the solder, oil stain, rosin, preservative, paraffin, oxide, rust, etc. on switches, integrated circuits, electronic circuit boards, semiconductor components, silicon wafers, quartz crystals, magnetic heads, magnetic tapes, optical discs, optical fibers, relays, capacitors, alarms, memories, liquid crystal displays, hard disk components

2: precious metals and jewelry are mainly used for cleaning jewelry, necklaces, jade, watches, glasses and other coatings, painting, composites, etc

3: the automotive industry mainly cleans the grease, preservatives, plastic residues, grinding abrasives, graphite, etc. on valves, ignition plugs, fuel pumps, fuel tanks, battery electrodes, piston rings, machine control panel parts

4: the aviation industry mainly cleans oxides, dust, chips, rust, carbon, scale, etc. on fuel filters, flow control equipment, gyroscopes, artificial satellites, and aviation hydraulic systems

5: the electroplating industry mainly cleans oil dirt, rust removal, phosphates, etc. of metal structural parts such as vernier calipers, tooling fixtures, spectacle frames, surgical instruments, dental tools, hardware, clock parts, fishing gear accessories, etc. before plating

6: the printing and textile industries mainly clean the microporous decontamination, ink stains, fingerprints, oils, dyes, etc. of rotary machines, spinnerets, and polyester filter elements

7: power mainly cleans ink, oil, dust, rust, etc. on street lamps, ammeters, bulbs, telex machines, insulators, etc

8: vacuum ion plating is mainly used to clean lenses, resin sheets, glass, lighting, arts and crafts and other pre coating cleaning and oil stains, fingerprints, dust, oxides, etc

9: medical devices are mainly used to clean the blood, gel, fingerprints, cooking residue, protein, etc. on syringes, pipettes, glass containers, cardiac pacemakers, esophagoscopes, rectoscopes, directional mirrors, artificial organs, etc

10: precision machinery mainly cleans the abrasives, iron filings, rust inhibitors, compounds, cooling oil, polishing, oxides, etc. on lead screws, nozzles, gears, springs, bearings, lead frames, manufacturing and maintenance machinery, fully enclosed compressors, heat exchangers, precision valves

1. The chemical industry

is mainly used for the cooling of chemical reaction kettles (it is a common way for chemical industry to carry out fatigue experiments on them, heat exchangers), so as to take away the huge heat generated by chemical reactions in time, so as to achieve the purpose of cooling (cooling) and improve product quality

2. The manufacturing industry of plastic products, plastic containers, food packaging films, medical packaging films, etc.

● whether the injection molding process of plastic products (televisions, computers, washing machines, refrigerators, air conditioners, plastic toys, automotive plastic accessories, etc.) can be cooled (cooled) in time and effectively will directly affect the appearance smoothness and appearance qualification rate of products, thus affecting production efficiency, production costs and corporate profits

● the production of plastic containers (bottle blowing) and packaging films cannot be separated from water chillers (ice water chillers). If plastic containers cannot be cooled and shaped in time during the production process, the produced containers will not be full, the wall thickness will be uneven, the color will not be bright, and even cannot be formed, resulting in low product quality. If there is no cooling and molding of cold water (air) in the production of packaging film, qualified products cannot be produced. If the cold water (air) provided by the water chiller (ice water machine) is used for cooling, it can not only greatly improve the product quality, but also improve the production efficiency

3. Cooling of electroplating solution, hydraulic oil and machine tool cutting tool coolant

● in electroplating production, the electroplating solution generates heat from time to time in the electroplating reaction, which gradually increases the temperature of the electroplating solution. When the temperature of the electroplating solution is higher than the requirements of the process, it has a great impact on the firmness, uniformity, flatness and surface finish of the surface coating of the produced electroplating products. However, the performance parameters of electronic components can be controlled in the designed state only when the components are kept or cooled at a specific temperature during the production process of electronic components provided by water chillers (ice water chillers). Cooling with water and keeping the constant temperature of the electroplating solution will greatly improve the electroplating production process and production efficiency

● the cooling of machine tool cutting tool coolant and the control of tool edge temperature will directly affect the service life of tools and product quality

4. Pharmaceutical industry

the pharmaceutical industry is mainly used for the control of temperature and humidity in the production workshop and the removal of reaction heat during the production of API

5 The electronic industry

in the production process of electronic components, the components need to be maintained or cooled at a specific temperature, so that the performance parameters of electronic components can be controlled in the designed state. (screw chiller, water-cooled chiller, air-cooled chiller, semi enclosed screw chiller, open industrial chiller, electroplating chiller, PCB chiller, chiller, refrigeration equipment, air-cooled box chiller, plastic industrial chiller/die-casting dedicated chiller)

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