Vibrating Powder Screening Machine

In industrial production, controlling powder particle size directly impacts downstream molding quality and mixing uniformity. The Vibrating Powder Screening Machine is used to complete powder material grading, impurity filtration, and large particle screening. This equipment adapts to dry fine powders, electrostatic lightweight powders, easily agglomerated dry powders, and material particles containing slight moisture. The screening mesh size covers 2 mesh to 500 mesh (aperture from 8 mm to 25 microns), with a single machine processing capacity ranging between 50 kg and 5 tons per hour, depending on material specific gravity, moisture content, and target mesh size.

How Does the Vibrating Powder Screening Machine Work?

Equipment operation relies on a vertical vibration motor as its power source. Eccentric heavy hammers installed at both upper and lower ends of the motor convert the motor's rotary motion into a three-dimensional continuous motion (horizontal, vertical, and inclined). This 3D motion is transmitted to the screen mesh surface, prompting the powder on the mesh to perform an outward spiral dispersion motion. Coarse particles remain on the mesh surface and are discharged from the upper discharge port, while fine powders meeting the aperture requirements fall through the mesh holes into the next layer or bottom outlet. Adjusting the phase angle (0° to 90°) of the upper and lower eccentric blocks can change the running track and retention time of the material on the mesh surface to adapt to the separation requirements of materials with different fluidities.

Technical Specifications & Selection Guide

The table below lists the technical parameters of standard Dahan models for equipment selection reference:

Selection Guide

1. Select diameter based on processing capacity: Choose DH-600 or DH-800 for capacities below 500 kg/h; choose DH-1200 or DH-1500 for capacities exceeding 2 t/h.

2. Select system based on material characteristics: If the material is finer than 200 mesh (75 microns) or prone to static electricity and clogging, an ultrasonic anti-blocking system must be added to the standard model.

3. Select model based on contact material: Choose full 316L stainless steel for acid/alkali corrosive materials; choose 304 stainless steel for parts in contact with standard materials.

Materials Processed by Dahan Powder Sifters

Dahan screening equipment is applied in fields such as metal powder metallurgy, battery cathode/anode materials, coatings/pigments, resin powders, bakery flour, and starch processing.

Real Material Testing Cases

• Case 1: 3D Printing Titanium Alloy Powder (Fine Powder Grading)

  • Material Characteristics: High sphericity, 300 mesh (48 microns) particle size, easily electrostatic.
  • Testing Scheme: Utilized a DH-800 single-layer ultrasonic vibrating screen with a 28kHz high-frequency ultrasonic vibration superimposed on the mesh.
  • Test Results: Throughput rate increased from 42% on a standard screen to 95%, with a stable hourly output of 180 kg and zero mesh clogging.

• Case 2: Epoxy Resin Powder (De-agglomeration and Impurity Removal)

  • Material Characteristics: 80 mesh particle size, prone to generating 2-5 mm small agglomerates when damp.
  • Testing Scheme: Utilized a DH-1000 single-layer dual-outlet screening machine equipped with silicone bouncing ball mesh-striking devices.
  • Test Results: Reached a processing capacity of 1.5 tons per hour, with oversized agglomerates and foreign matter continuously discharged from the top outlet, leaving no oversized particles in the bottom material.

Why Choose Dahan Machine?

Industrial powder screening frequently encounters problems like mesh blinding, powder leakage, and time-consuming screen mesh replacements. Dahan Machine has implemented structural and manufacturing detail improvements:

• Resolving fine powder blinding: In addition to conventional rubber bouncing balls, Dahan offers ultrasonic transducer systems that convert electrical energy into high-frequency mechanical waves transmitted to the mesh surface, breaking powder adsorption force and solving mesh clogging for powders above 200 mesh.
• Resolving powder leakage: Clamping band structures are used at cylinder connections for flat compression, paired with foamed silicone sealing rings to prevent fine powder from overflowing under positive pressure and maintain workshop cleanliness.
• Shortening maintenance downtime: Incorporates quick-assembly screen frame structures. Loosening V-clamp bolts on four sides allows screen frame removal, enabling a single operator to complete mesh replacement and cleaning within 5 minutes.
• Extending component service life: Material-contact parts are crafted from 304 or 316L sheets with crevice-polished welds. The lower base is reinforced, and vibration motors feature copper wire windings and dual bearings to lower shutdown maintenance frequency.

Frequently Asked Questions

What is the main purpose of a powder sieving machine?

The equipment serves three purposes: impurity removal (eliminating oversized particles, foreign matter, or agglomerates in fine powders); grading (utilizing multi-layer meshes to separate the same powder into multiple size specifications); and liquid-solid separation (filtering out insoluble suspended particles in slurry).

How to choose between standard vibrating sieve and ultrasonic powder sifter?

For coarse powders below 200 mesh (75 microns) or free-flowing granules, a standard 3D vibrating screen with bouncing balls suffices. If the material fineness ranges between 200 mesh and 500 mesh, or if the material exhibits hygroscopic, strong electrostatic, highly sticky, or lightweight properties, an ultrasonic vibrating screen is necessary.

What is the difference between screening and sifting?

Screening generally refers to coarse separation processes with larger particles and capacities, often used for ores, construction materials, or coarse bulk materials. Sifting generally refers to impurity removal and homogenization grading of micro-powders and fine powders, common in food ingredients and fine chemical powders. In equipment contexts, these terms are often used interchangeably.

How much does a vibrating powder screening machine cost?

Equipment cost is determined by four factors:

1. Equipment Dimensions: Significant cost differences exist between a compact DH-400 and a large DH-1500.
2. Material Selection: Prices vary between full carbon steel, material-contact parts in 304 stainless steel, and full 316L stainless steel.
3. Layer Configuration: Manufacturing hours differ for single-layer discharge versus multi-layer grading structures.
4. Additional Systems: Whether an ultrasonic system (ultrasonic power supply and transducer) is added will increase configuration fees.

Submit your material name, required mesh size, and throughput capacity, and technical personnel will provide a detailed quotation list.

Request Your Custom Powder Screening Solution Today

Finding the right screening equipment for your factory conditions requires combining material specific gravity and fluidity testing.

Please provide the following parameters to the Dahan technical team:

1. Material name and bulk density (g/cm³)
2. Target screening mesh size (Mesh) or aperture (mm)
3. Required hourly processing capacity (kg/h)

Dahan engineers will issue selection drawings, material test reports, and solution quotes within 12 hours. Send an email to our customer service inbox or submit your selection requirements directly below!