Vibrating screening machine for plastic pellets

Vibrating screening machine for plastic pellets is the core equipment for particle classification in the plastic processing industry chain. The screening mesh coverage of the equipment is usually between 20 mesh and 400 mesh, which can meet the classification needs from coarse particles to fine powders. The characteristics of the equipment are reflected in the modular screen configuration, fully enclosed dustproof structure and adjustable vibration parameter design. At the same time, it is compatible with dry screening with a moisture content of less than 5% and wet operation scenarios of wet materials.

Working principle of vibrating screening machine for plastic pellets

Vibrating screening machine for plastic pellets adopts a three-dimensional vibration composite motion system. Its core power source is a vertical vibration motor, and the upper and lower counterweights form an asymmetric mass distribution. When the motor runs at 1440r/min, the centrifugal force generated by the eccentric block is decomposed into composite vibrations in the horizontal, vertical and inclined directions, forming a spiral motion trajectory with a diameter of 300-500mm on the screen surface.

The screening system adopts a modular design. The standard configuration includes 3-5 layers of screens. Each layer of screens is fixed by a parent-child buckle. The screen replacement operation can be completed within 3-5 minutes. The material of the screen is selected according to the material characteristics. The polyurethane screen has excellent wear resistance and is suitable for glass fiber reinforced plastic particles; the stainless steel woven mesh has an opening rate of up to 60%, which is suitable for screening low-density polyolefin materials.

The vibration parameter adjustment is achieved by changing the angle between the upper and lower counterweights. The phase angle adjustment range is 0-90°, and three modes of linear vibration, elliptical vibration and circular vibration can be generated. For the screening of plastic particles, when the phase angle is set to 45°, the material movement trajectory can cover more than 85% of the screen surface area, which is 30% higher than the traditional vibrating screen.

Advantages and characteristics of Vibrating screening machine for plastic pellets

Screening accuracy control

The equipment can achieve classification within the range of 0.5mm to 5mm, and the screening accuracy of 2mm standard particles is 98.2%, and the misscreening rate is less than 1.8%. For microplastic particles (<0.5mm), the screening rate can be increased to 92% after configuring the ultrasonic auxiliary system. The multi-layer screening system (1-5 layers) can obtain 2-6 finished products of different specifications at the same time.

Processing capacity

The processing capacity of the equipment is proportional to the screen surface area. The processing capacity of the standard model with a diameter of 1.2m is 3t/h, and the maximum model (diameter 1.8m) can reach 5t/h. The vibration frequency can be adjusted by the frequency converter to meet different production capacity requirements. In the plastic recycling industry, the equipment can operate continuously and the output can reach 5 tons/hour, meeting the needs of large-scale production.

Operation stability

Four sets of high-strength rubber springs constitute the shock absorption system, the amplitude attenuation rate reaches 85%, and the basic dynamic load of the equipment is reduced by 60%. The bearing seat adopts double-row tapered roller bearings with a rated life of more than 20,000 hours and a maintenance cycle extended to 6 months. The equipment is also equipped with an automatic tensioning device to maintain a constant tension on the screen and extend the service life of the screen.

Application of Vibrating screening machine for plastic pellets

Plastic processing industry

Raw material purification: In the granulation production of resins such as polypropylene and polyethylene, the equipment can remove impurities, unmelted blocks and fine powder in the raw materials to ensure uniform product particle size.

Product classification: In the processes of plastic modification and color matching, products with different particle sizes are obtained through multi-layer screening to meet customer customization needs.

Quality control: Configure an online particle size detection interface to provide real-time feedback on particle size distribution to ensure product quality stability.

Food industry

Raw material processing: Used for screening food raw materials such as sugar, salt, and flour to remove impurities and ensure food safety.

Additive processing: In the production of food additives, precise particle size control is achieved to improve product stability.

Special application scenarios

Conductive plastic screening: Configure explosion-proof motors and grounding monitoring systems to ensure safe operation in combustible dust environments.

High-temperature material processing: Use high-temperature resistant screens and cooling systems to meet the needs of high-temperature granulation processes.

Microplastic processing: For microplastic particles (<0.5mm), configure an ultrasonic auxiliary system to improve screening efficiency.

The technical core of the Vibrating screening machine for plastic pellets is to achieve particle classification and impurity removal through controllable vibration. The equipment can simultaneously complete multi-level particle size separation through the combination of multiple layers of screens. The screening accuracy and processing capacity can be matched according to process requirements by adjusting the vibration frequency, screen aperture and number of layers. Its application scenarios cover key links such as plastic raw material purification, product particle size control and recycled material purification.