purge lumps, gate agglomerates and color change materials often have irregular shapes and thick sections, and the weight of a single piece may vary several times. Whether direct feeding is appropriate should be judged by the largest block rather than the average block, and confirm whether there are metal or highly filled components in the material.
Material characteristics
- Incoming plastic materials often have differences in size, wall thickness, toughness and packing density. The difficulty of processing cannot be judged just by the name of the resin.
- Labels, sediment, metal accessories, oil and moisture content can affect tool wear, cleaning load and finished product quality.
- Volume reduction, external sales, cleaning and granulation, and reuse production have different requirements for discharge size, cleanliness, and fine powder ratio.
Key processing challenges
- When a thick block contacts the tool, the load is concentrated, and oversized pieces may not form effective bite.
- Highly filled, fiberglass or mineral formulations can significantly change hardness and wear.
- Blocks that appear to be similar on the surface may have metal or unmelted material trapped inside.
Equipment-selection criteria
- First determine the maximum single piece size, shape and feeding method, and then check the hopper, feed port, pressing structure and conveying rhythm.
- Select the tool structure, driving mode and whether to configure the screen according to the goal of primary volume reduction or subsequent fine crushing, and do not blindly pursue the production of fine materials at one time.
- Use normal incoming materials and extreme incoming materials to test the materials together, record the bite, current, discharging and winding conditions, and then confirm the continuous operation configuration.
Typical process flow
Block materials that exceed the allowable boundaries of the equipment are first hydraulically cut or specially pre-broken, and then shredded at low speed. Subsequent steps include fine crushing, screening, iron removal and granulation according to reuse requirements, focusing on controlling oversized particles and metal pollution.
Information required before project evaluation
Complete information helps us define equipment limits, test plans and the full line accurately:
- Plastic types, sources and respective proportions
- Maximum and common dimensions, wall thickness, unit weight
- Metal, sediment, labels and residues
- Hourly throughput, shifts and incoming material fluctuations
- Target discharging, cleaning or granulation requirements
- Feeding method, site, electricity and environmental protection conditions