Feeding Equipment Selection Guide for Plastic Grinding Machines

Time:2025-07-09

Core differences of four types of feeding machines

Feeder Type	Core Advantages	Suitable Materials	Avoid (Unsuitable Scenarios)
Vacuum Feeder	Clean, long-distance conveying	Granules, dry powders, small/medium-sized fragments	Sticky materials (prone to pipe adhesion), lightweight materials (prone to drift)
Screw Feeder	Precise feed rate control, simple maintenance	Medium-hardness granules, fragments (e.g., plastic pellets, metal scraps)	Soft materials (prone to deformation/blockage), sticky materials (prone to screw adhesion)
Belt Feeder	High throughput, suitable for large/thick materials	Sheet material scraps, thick-walled pipe fragments, large-sized chunks	Powder materials (prone to belt adhesion, requires frequent cleaning)
Vibratory Feeder	Stable conveying, low material damage	Fragile fragments (e.g., glass, ceramics), small granules	Long-distance conveying (vibration衰减, limited range)

Spiral feeding machine

Conveyor belt feeding machine

Select based on material characteristics

Granular Plastics (e.g., PP, PE pellets)

Priority: Vacuum feeders (clean & efficient) or screw feeders (precise feed rate control).

Note: If particle diameter >10mm, switch to vibratory feeders to avoid crushing from compression.

Fragments/Scrap Materials

Small/medium-sized fragments (<50mm): Choose screw feeders or vacuum feeders.

Large fragments (>50mm): Use belt feeders directly.

Fragile film/sheet fragments: Vibratory feeders are preferred (gentle conveying to prevent damage).

Powdered Plastics (e.g., PVC powder, modified powders)

Recommended: Vacuum feeders (dust-proof) or scraper feeders (anti-clogging).

Special case: Lightweight foamed powders require high-negative-pressure vacuum models.

Sticky/Moist Materials (e.g., TPE, wet recycled materials)

Avoid: Screw and vibratory feeders (prone to adhesion/blockage).

Reliable options: Scraper feeders (forced conveying) or belt feeders (smooth surface, less adhesion).