Plastic Shredder
Plastic Shredder
Multiple domestic factories for bidding. Free promotion. Price to be negotiated between winning bidder and buyer.
Please provide below information for posting:
- Machine model or rotor diameter; 2. Shredding requirement: heavy‑duty, low‑noise, low‑speed, sheet‑material, film‑material; 3. Purchase quantity
表格
| Type | Working Principle | Core Advantages | Main Limitations | Typical Application |
|---|---|---|---|---|
| Single‑Shaft Shredder | Shearing occurs between one rotating rotor and fixed counter‑blades; bottom screen controls output particle size. | Simple structure, cost‑effective, convenient screen replacement; around 60 % market share, wide application range. | Fast wear when processing high‑hardness or impurity‑laden materials. | Injection sprues, PE film, PP woven bags, PET bottles, ABS housings and other medium‑low hardness clean plastics. |
| Dual‑Shaft Shredder | Two parallel counter‑rotating rotors break materials through tearing and shearing. | High impact resistance; handles high‑moisture, fiber‑containing or slightly metal‑contaminated materials; low jamming risk. | Relatively coarse output size (10‑100 mm); secondary fine shredding by single‑shaft granulator is required for fine particles. | Thick‑wall PVC pipes, automotive bumpers, e‑waste plastics (minor metal content), medical plastic scrap and other demanding working conditions. |
| Multi‑Shaft Fine Granulator | Three‑shaft or four‑shaft design integrating coarse‑shredding, intermediate‑shredding and fine‑shredding with multi‑stage screening. | Extremely high particle uniformity (≥98 %); multi‑stage shredding completed in one unit, ideal for high‑quality regrind production. | High capital investment; energy consumption 10‑15 % higher than single‑shaft machines. | Food‑grade PET flakes, medical‑grade PP pellets and other fields requiring high pellet purity and uniformity. |
| Claw‑Blade Granulator | Claw‑shaped blades distribute stress and increase shearing force for each cutting edge. | Suitable for thick‑wall and hard lumps & sprues; low tool wear, powerful cutting performance. | Less suitable for soft film‑type materials. | Sprues, shoe‑last materials and various rigid plastics. |
| Flat‑Blade / Sheet‑Blade Granulator | Sheet‑form blades or wide flat‑blade configuration between claw‑blade and flat‑blade styles. | Ideal for large‑volume thin‑wall parts such as boxes, pipes, sheets, bottles and housings. | Inferior shredding performance for ultra‑hard materials compared with claw‑blade type. | Common sheets, pipes, profiles, packaging containers, boxes and blow‑molded parts. |
Supplementary note for blade selection: Claw‑blades for hard materials; flat/sheet‑blades for thin‑wall parts and general‑purpose plastics. This matching relationship shall be emphasized during model selection.
Core Specifications: Hard Indicators for Selection
After confirming machine type, select proper specifications with following key parameters:
Throughput / Output (kg/h): Hourly shredded plastic weight, core indicator of production capacity. ‑ Small‑size unit: 50‑300 kg/h ‑ Medium‑size unit: 500‑1500 kg/h (PC‑800B: 800‑1200 kg/h; FB‑600: 400‑1000 kg/h) ‑ Large‑size unit: 2000‑5000 kg/h or higher (dual‑shaft models up to 5 tons/hour)
Selection tips: Calculate according to daily processing demand (e.g. 8‑hour shift); reserve 20 % safety margin to avoid efficiency drop under full‑load operation.
Motor Power (kW): Determines driving power and energy consumption. Range: 2.2 kW (small unit) up to 160 kW (large dual‑shaft unit). Common configurations: 30‑55 kW for medium general‑purpose machines; 75‑90 kW for large‑size units.
Energy reference: Soft plastics (PE/PP): approx. 1‑1.5 kWh per ton; hard plastics (PVC/ABS): 2‑3 kWh per ton; dual‑shaft machines consume 20‑30 % more power than single‑shaft units.
Shredded Particle Size (mm): Output pellet dimension, determines direct reusability or further processing requirement. ‑ Coarse shredding (dual‑shaft): 10‑100 mm, for volume reduction or pre‑processing ‑ Intermediate shredding: 5‑20 mm, preparation before granulation ‑ Fine shredding (single‑shaft fine granulator): 2‑5 mm, directly reusable for injection molding ‑ Ultra‑fine grinding: up to 200‑mesh (approx. 0.074 mm), requires special water‑cooled pulverizer
Application reference: 2‑5 mm fine particles for injection re‑use (single‑shaft fine granulator with 3 mm screen); 5‑15 mm acceptable for extrusion granulation (dual‑shaft with 10 mm screen).
Screen Aperture (mm): Critical component controlling output particle size; adjust particle size by replacing screens of different apertures. Common apertures: Φ2‑20 mm; precision screening down to 1 mm.
Cutter Material & Service Life: Directly affects operating cost and maintenance frequency. Common grades: ‑ SKD11 (general‑purpose, HRC58‑62, good cost‑performance) ‑ Cr12MoV (high‑hardness, for fiber‑containing or impurity‑laden materials, HRC60‑63) ‑ D2 high‑alloy steel (high wear‑resistance) ‑ Imported tool steel (durable, multiple re‑grinding cycles available)
Replacement cycle: Under normal conditions with re‑grinding allowed: single‑shaft cutter service life approx. 1000 hours; dual‑shaft approx. 800 hours.
Feed Opening Size (mm): Defines maximum dimension of feedable materials. ‑ Small unit: 180×160 mm (NPCP‑30) ‑ Medium unit: 400×250 mm (NPCP‑100) ~ 600×800 mm (PC‑800B) ‑ Large unit: 1000×1520 mm (PC‑1500B), 1200×1050 mm (GC series)
Special design: Sheet granulators adopt rectangular feed opening; pipe granulators adopt round‑tube feed opening.
Main‑Shaft Rotation Speed (rpm): Influences shredding efficiency and shearing effect. Range: 150‑650 rpm; some single‑shaft high‑speed models reach 520 rpm; ultra‑fine pulverizer up to 5000 r/min (water‑cooling required).
Machine Weight & Overall Dimension (kg, mm): Affect installation site and foundation requirements. ‑ Small unit: 200‑400 kg, footprint approx. 1.5×1×1.8 m ‑ Medium unit: 1000‑2600 kg ‑ Large unit: 3200‑14850 kg, footprint above 4×2×3 m; reserve 1‑2 m maintenance clearance; concrete foundation bearing capacity ≥ twice machine weight.
Selection Guidelines
Follow clear logic for plastic shredder / granulator selection:
‑ Determine machine type by feed material: Soft materials (PE film, PP woven bags), injection sprues, PET bottles: single‑shaft fine granulator is preferred. Hard materials (thick‑wall PVC pipes, automotive bumpers), e‑waste plastics with minor metal content: choose dual‑shaft shredder for high impact resistance and low jamming risk. Large‑volume thin‑wall parts (boxes, sheets, housings): flat‑blade / sheet‑blade granulator recommended. Hard lumps and thick‑wall stock: claw‑blade granulator delivers better performance. High‑quality regrind (food‑grade, medical‑grade): multi‑shaft fine granulator guarantees particle uniformity and purity.
‑ Determine specification by throughput: Define required hourly throughput (kg/h) according to daily processing demand with 20 % safety margin; match corresponding motor power and feed‑opening dimension.
‑ Determine particle size by re‑use requirement: Direct injection re‑use: 2‑5 mm fine particles; select single‑shaft fine granulator fitted with 3 mm screen. Extrusion granulation: 5‑15 mm acceptable; dual‑shaft shredder with 10 mm screen. Volume‑reduction only: 20‑50 mm coarse shredding is sufficient.
‑ Determine cutter configuration by operating cost: Select cutter material according to material abrasiveness and budget (SKD11 for general use / Cr12MoV for high‑hardness / imported tool steel for long service life). Confirm cutters support re‑grinding for extended service life.
‑ Consider environmental & safety configurations Noise reduction: standard sound‑insulation cover (10‑15 dB reduction); double‑layer sound‑insulation for large‑size units (noise ＜80 dB). Dust removal: cyclone or cartridge dust collector for compliant emission. Safety: emergency‑stop button, power‑off protection upon cover opening, overload protection and other mandatory devices.
Participation Process
Manufacturers: Contact supplier service for supply registration.
Buyers: Click group‑purchase or contact procurement service to submit requirements. The platform filters suppliers from database or releases bidding based on aggregated demands. Buyers select competitive suppliers and sign sales contracts.
