Types of Laboratory Sieving Machines

Common types of laboratory sieving machines include vibrating sieves, reciprocating sieves, and ultrasonic sieves. Vibrating sieves are suitable for medium to coarse particles, reciprocating sieves for fine powders, and ultrasonic sieves for micro-powders and easily agglomerated materials.

Vibrating Sieving Machine: Suitable for processing medium-sized materials, with a sieving accuracy of approximately 0.02 mm. Sample throughput is typically 100 g to 5 kg. The sieve mesh is usually made of stainless steel or nylon, the vibration frequency is adjustable, and the sieving is uniform. Suitable for sieving and testing materials such as sand, grains, and plastic particles.

Reciprocating Sieving Machine: Suitable for sieving fine or micro-powders. The sieve mesh is primarily made of stainless steel. The vibration frequency is fixed or adjustable, ranging from 50 to 200 times per minute. The movement is gentle, the sieving speed is relatively slow, and it causes minimal damage to fragile particles. Suitable for sieving metal powders, abrasives, and some chemical crystals.

Ultrasonic Sieving Machine: Can break up powder agglomerates, improving the sieving efficiency of fine powders. The screen is made of stainless steel, with common mesh sizes ranging from 10μm to 2mm. High-frequency vibration at 20kHz ensures smooth material passage. Suitable for screening fine ceramic powders, pigments, graphene, ultrafine metal powders, and certain moist chemicals.