The QLSP18-65 airflow vibrating sieve is a specialized screening machine designed for efficient separation and classification of fine powders, granules, and other materials. It combines the principles of airflow separation and mechanical vibration to achieve high precision and productivity. This article delves into the working principle of the QLSP18-65 airflow vibrating sieve, explaining how it operates and why it is an effective solution for various industrial applications.

Overview of the QLSP18-65 Airflow Vibrating Sieve
The QLSP18-65 airflow vibrating sieve is a versatile screening machine that integrates two key mechanisms: airflow separation and mechanical vibration. This unique combination allows the machine to handle materials that are difficult to screen using traditional methods, such as fine powders, lightweight particles, and materials with high moisture content. The machine is widely used in industries such as food, pharmaceuticals, chemicals, and metallurgy.
Working Principle
The QLSP18-65 airflow vibrating sieve operates through a combination of airflow and vibration, which work together to achieve efficient and precise screening. Here’s a step-by-step breakdown of its working principle:
- Material Feeding
- The material to be screened is fed into the machine through an inlet at the top of the sieve.
- The feeding process is controlled to ensure a consistent and even flow of material onto the screen surface.
- Mechanical Vibration
- The sieve is equipped with a vibrating motor that generates mechanical vibrations. These vibrations create a three-dimensional motion (horizontal, vertical, and inclined) that moves the material across the screen surface.
- The vibration helps to disperse the material evenly, ensuring that all particles come into contact with the screen mesh.
- The vibrating motion also aids in breaking up agglomerates and preventing clogging of the screen mesh.
- Airflow Separation
- The QLSP18-65 airflow vibrating sieve incorporates an airflow system that uses controlled air currents to assist in the screening process.
- A fan or blower generates airflow that passes through the screen mesh from below. This airflow helps to lift and separate fine particles from the material bed.
- The airflow also helps to dry and cool the material, making it particularly useful for screening moist or sticky materials.
- Particle Separation
- As the material moves across the screen surface, particles smaller than the mesh size pass through the openings, while larger particles are retained on the screen.
- The combination of mechanical vibration and airflow ensures that even fine and lightweight particles are effectively separated, improving screening efficiency and accuracy.
- Material Discharge
- The screened material is discharged through separate outlets for the oversize and undersize fractions.
- The oversize particles (larger than the mesh size) are collected at one outlet, while the undersize particles (smaller than the mesh size) are collected at another outlet.
- The airflow system helps to transport the undersize particles to the collection point, ensuring a clean and efficient separation process.
Key Features of the QLSP18-65 Airflow Vibrating Sieve
- Dual Screening Mechanism
The combination of mechanical vibration and airflow separation ensures high screening efficiency and accuracy, even for challenging materials.
2. Adjustable Vibration and Airflow
The vibration frequency and airflow intensity can be adjusted to suit different materials and screening requirements, providing flexibility and control.
3. Self-Cleaning Screen Mesh
The airflow system helps to prevent clogging of the screen mesh, reducing the need for frequent cleaning and maintenance.
4. Hygienic Design
The machine is constructed from high-quality stainless steel, making it easy to clean and suitable for use in industries with strict hygiene requirements, such as food and pharmaceuticals.
5. Energy Efficiency
The QLSP18-65 airflow vibrating sieve is designed to be energy-efficient, with low power consumption and minimal heat generation.
Applications of the QLSP18-65 Airflow Vibrating Sieve
The QLSP18-65 airflow vibrating sieve is widely used in industries that require precise and efficient screening of fine powders, granules, and other materials. Some common applications include:
- Food Industry: Screening flour, sugar, starch, and other food additives.
- Pharmaceuticals: Separating active pharmaceutical ingredients (APIs) and excipients.
- Chemicals: Screening pigments, resins, and other fine or sticky materials.
- Metallurgy: Separating metal powders and other fine particles.
- Cosmetics: Screening talc, mica, and other cosmetic powders.
- Ceramics: Separating ceramic powders and glazes.
Advantages of the QLSP18-65 Airflow Vibrating Sieve
1. High Screening Efficiency
The dual screening mechanism ensures efficient separation of particles, even for fine and lightweight materials.
2. Precision Screening
The adjustable vibration and airflow settings allow for precise control over the screening process, ensuring accurate particle separation.
3. Versatility
The machine can handle a wide range of materials, including fine powders, granules, and moist or sticky substances.
4. Low Maintenance
The self-cleaning screen mesh and durable construction reduce the need for frequent maintenance and repairs.
5. Hygienic and Easy to Clean
The stainless steel construction and smooth surfaces make the machine easy to clean and suitable for use in hygienic industries.