1. High Impact Force, Strong Ability to Remove Stubborn Contaminants

   · Mechanical Scrubbing Action: High-pressure jets (pressures typically ranging from tens to hundreds of Bar, or even thousands of Bar) possess extremely high kinetic energy, effectively scrubbing, cutting, and stripping heavily attached, stubborn soil from the workpiece surface, such as molding sand from castings, oxide scale after heat treatment, heavy oil sludge, paint coatings, and concrete clumps. This is its most significant advantage.

2. High Cleaning Efficiency, Suitable for High-Volume Continuous Operation

   · Continuous Action: Spraying is a continuous process; the cleaning action is uninterrupted and covers a large area.

   · High Compatibility with Production Lines: Very easy to design fully automated lines combined with conveyors, rotary tables, etc. Workpieces are cleaned by multi-angle nozzles while in motion, resulting in extremely high production efficiency, suitable for high-volume, relatively regular-shaped workpieces (e.g., leaf springs, bearings, car wheels, hardware parts).

3. Uniform Coverage, Good Cleaning Consistency

   · Through the rational design of nozzle layout, angle, and workpiece movement, it can ensure that every workpiece or every external surface of the workpiece receives fundamentally consistent spray cleaning, avoiding variations due to manual operation.

4. Primarily Cleans External Surfaces, Excellent for Open Surfaces

   · For workpieces with open, regular external surfaces such as plates, discs, and shafts, high-pressure spraying can achieve fast and thorough cleaning.

5. Can Achieve Multi-Process Integration (Pre-wash, Main Wash, Rinse, Blow Dry)

   · On one spray cleaning line, multiple chambers can be set up sequentially to perform spray degreasing, spray rinsing, spray anti-rust treatment, and hot air drying, achieving full automation of the cleaning and drying process.

Limitations (Points Requiring Attention)

1. "Straight-Line" Propagation, Ineffective for Complex Internal Cavities and Blind Holes

   · Biggest Limitation: High-pressure jets travel in a straight line and are blocked by obstacles. For deep holes, fine holes, complex internal cavities, threaded crevices, and other areas, the jet cannot directly impact, leading to a severe **"shadow effect,"** where the cleaning effect is very poor or non-existent. This contrasts sharply with the "penetrative" nature of ultrasonic cleaning.

2. May Cause Damage or Deformation to Workpieces

   · Surface Damage: Excessive pressure or unsuitable spray distance may damage precision surfaces, soft materials (like aluminum, copper), or finished smooth surfaces.

   · Workpiece Deformation: For thin-walled parts and sheet metal parts, the high-pressure impact force may cause physical deformation.

3. High Water and Electricity Consumption

   · To maintain high pressure and continuous spraying, water pump power is usually high, leading to high energy consumption. Additionally, the spraying process typically requires a large volume of circulating cleaning fluid, and while filterable, the overall consumption is still greater than that of ultrasonic tank cleaning.

4. Prone to Splashing and Mist Issues

   · High-pressure impact generates significant splashing droplets and mist, necessitating well-sealed chambers, tanks, and exhaust treatment devices (like oil mist collectors). High demands are placed on working environment control.

5. Cleaning Effectiveness Relies on Nozzle Design and Layout

   · The uniformity and thoroughness of cleaning are highly dependent on the nozzle type (fan, cone, straight jet), pressure, flow rate, angle, and the relative movement between the workpiece and the nozzle. Improper design easily leads to dead spots.

Main Application Fields

High-pressure spray cleaning is highly suitable for industries requiring high-intensity, high-efficiency processing of large volumes of regular workpieces:

· Automotive Manufacturing: Cleaning engine blocks, crankshafts, transmission casings, wheels, leaf springs, etc.

· Post Metal Processing and Heat Treatment: Removing oxide scale, molding sand, quenching oil, etc., from the surfaces of forgings and castings.

· Aerospace: Cleaning aircraft landing gear and large structural components.

· Rail Transit: Cleaning train carriage exteriors and bogies.

· Building Materials and Engineering Machinery: Cleaning concrete mixer truck drums, construction templates.

· Hardware and Standard Parts: High-volume cleaning of bolts, nuts, and chains.

Summary

The core characteristic of high-pressure spray cleaning is the use of directional, high-pressure fluid kinetic energy to achieve efficient, continuous, and automated scrubbing of stubborn external contaminants. It is not a simple substitute for ultrasonic cleaning but a complementary process. In practical industrial applications, the two are often combined: Spray first, then ultrasonic: Spraying is used first to remove most of the heavy soil, followed by ultrasonic for precision deep cleaning.

Combined cleaning line: Setting up both spray and ultrasonic stations in one production line, utilizing their respective advantages. The choice of technology hinges on the geometric complexity of the workpiece and the nature of contaminant adhesion. Choose spraying for "heavy external soil"; choose ultrasonics for "fine internal soil."