Plastic powder Screening Machine

Plastic powder Screening Machine is used in plastic processing and powder handling to classify, remove impurities, and filter plastic powders, eliminating lumps, metallic impurities, or particles of unsuitable size to ensure smooth subsequent molding and modification. Its screens range from 2 mesh to 500 mesh, with the finest capable of filtering down to 5 microns, suitable for processing coarse to ultrafine powders. Machine diameters are available from 400 to 2000 mm, with a single unit producing between 100 and 1000 kg per hour, suitable for both laboratory pilot projects and industrial mass production. Parts in contact with the material are primarily made of polypropylene to prevent oxidation or chemical reactions between metal and powder, keeping the plastic powder clean. It is easy to operate, can run continuously for 24 hours, and can be integrated with feeding, conveying, and mixing equipment to achieve streamlined processes for material feeding, grading, and impurity removal. The discharge port is also 360-degree adjustable to adapt to different production line layouts.

Plastic Powder Screening Machine Design

The Plastic Powder Screening Machine features a fully enclosed vertical structure, consisting of a feed inlet, dust cover, clamping ring, screen frame, screen mesh, screen cleaning device, vertical vibrating motor, spring damping system, and base. Two screen mesh options are available: standard PP plastic woven mesh, which is acid and alkali resistant and does not easily trap powder; for higher precision, nylon or PTFE mesh can be selected, which is wear-resistant and does not easily trap powder. The number of screen layers can be selected from 1 to 5, allowing for the separation of up to 6 particle sizes in one pass. A three-layer configuration is commonly used to balance screening speed and accuracy. The YZUL vertical vibrating motor converts rotational motion into horizontal, vertical, and inclined three-directional motion through upper and lower eccentric weights, eliminating mechanical transmission losses. After the plastic powder enters through the feed inlet, it undergoes an outward expanding involute motion on the screen surface. Small particles pass through the screen and fall, while larger particles are discharged along the screen surface. Bouncing balls below the screen continuously impact the screen, preventing fine powder from clogging the holes and maintaining stable and smooth screening.

Advantages of Plastic Powder Screening Machines

Plastic powder screening machines are designed with the characteristics of powders—lightweight, prone to dust generation, and static electricity—in mind, as well as the needs of production lines. The vertical, fully enclosed structure reduces dust dispersion and maintains a clean workshop environment. Some models are equipped with ultrasonic vibration or gas-assisted spraying devices to prevent micro-powder from clogging the screen due to static electricity. Plastic powders have poor flowability and require high purity and cleanliness; any metallic impurities or large particles can affect the quality of downstream injection molding, extrusion, or coating products. Vibrating screens can remove clumps and foreign objects from plastic powder, ensuring that the powder particles entering the processing machine are uniform. This is fundamental for producing thin-walled parts, optical components, or high-performance coatings. In plastic recycling lines, screening machines separate fibers and impurities from ground plastic powder, improving the quality of recycled materials. Therefore, it is not only a powder screening tool but also a crucial link in maintaining smooth production line operation, improving product qualification rates, and utilizing raw materials.

Application Scenarios of Plastic Powder Screening Machines

Plastic powder screening machines are used in all stages of the plastics industry chain. In raw material production, it can classify polymerized resin powder to ensure consistent specifications of raw materials leaving the factory. In the product processing stage, it is typically placed after the mixer or before the injection molding or extrusion machine to perform a final screening of the mixed formulation materials, preventing impurities from damaging the mold or screw. In masterbatch and color masterbatch production, it is used to screen the carrier resin and pigment mixture, ensuring uniform color dispersion and no particles. On plastic recycling lines, it can cleanly screen the crushed and ground powder, improving the quality of recycled materials. Furthermore, in fields with strict requirements for powder particle size, such as 3D printing powder, powder coatings, and polymer composites, vibrating screens help achieve uniform particle distribution, providing stable materials for subsequent processing.

Plastic powder screening machines are used to evenly separate powders while removing impurities and clumps, and are resistant to acid and alkali corrosion. With multiple screen aperture sizes, flexible processing capacity, and automated operation, they can be used in both large and small factories, solving the problems of plastic powder agglomeration and static electricity. The fully enclosed design and PP material ensure clean materials and low dust. Multi-layered screens with bouncing ball cleaning ensure a smooth and stable screening process. In applications such as modified plastics, powder coatings, and 3D printing materials, it ensures consistent particle size, reduces raw material waste and equipment malfunctions, makes production lines run more smoothly, and is easy to operate. It is an indispensable piece of equipment in modern plastics processing.