塑料回收机械供应商

A complete plastic recycling line processes waste plastic through four main stages. Stage 1 — Size reduction: shredders, granulators, and crushers reduce incoming baled or loose plastic waste to chips or flakes of a consistent size (typically 10–30mm) suitable for washing. Heavy-duty single-shaft shredders handle mixed, baled, or large-format plastic; granulators are used for rigid plastic and pre-cut film. Stage 2 — Washing: the crushed flakes are cleaned to remove dirt, labels, adhesives, and contaminants. The washing section typically includes a friction washer (high-speed scrubbing to remove surface dirt), a sink-float separation tank (separates materials by density — PE and PP float; PET, PVC, and contaminants sink), a hot wash tank (for removal of adhesive labels and greasy contamination), and rinsing tanks. Stage 3 — Drying and dewatering: centrifugal dryers and thermal dryers remove water from the washed flakes to below the moisture level required for extrusion (typically below 1%). Stage 4 — Pelletising (optional): a single-screw or twin-screw extruder melts the clean dry flakes and extrudes pellets or strands that are water-cooled and cut — producing recycled plastic pellets ready for reuse in manufacturing. Complete turnkey lines and individual machines for each stage are available.

Plastic recycling machinery is highly material-specific — the same general stages apply, but machine design, temperature settings, and washing chemistry differ significantly by material. Film washing lines (LDPE, LLDPE, PP film, agricultural mulch film) require different handling than rigid plastic washing lines (HDPE bottles, PP containers). Woven bag (PP raffia) washing lines need different agitation than post-consumer mixed rigid lines. Understanding your input waste stream before specifying machinery is essential. Key questions: What is the input material type and form (film, rigid, woven, mixed)? What is the contamination type and level (soil, sand, labels, grease, food residue)? What is the target output specification (flake quality, moisture content, contamination level for the pelletising line)? What is the target throughput in kg/hour? What is the available water supply and wastewater treatment capacity? A line designed for clean post-industrial PP film waste will be inadequate for processing heavily contaminated agricultural mulch film — confirm the waste stream specification with the machinery supplier before purchasing.

Buyers can source individual recycling machines (crusher, washer, dryer) from specialist manufacturers, or purchase a complete turnkey washing line from a plant integrator who designs, supplies, and commissions the full system. For buyers without recycling plant engineering expertise, a turnkey package from an experienced integrator reduces the risk of machine incompatibilities and process imbalances — but at a higher package cost. For buyers with engineering capability or who need to match new equipment to an existing line, sourcing individual machines from specialist manufacturers gives more flexibility. China is the dominant global source for plastic recycling machinery across the price-to-quality spectrum — manufacturers in Zhangjiagang, Changzhou, and Qingdao specialise in washing lines, extruders, and pelletising systems. European manufacturers (EREMA, Starlinger, NGR, Herbold, BRT) produce premium recycling systems with higher throughput, better energy efficiency, and more automation — at a significant price premium.