Plastic Color Sorter for Plastic Flake Sorting | Precise Separation of Off-Color Impurities, Supporting Plastic Resource Recycling | Machinery Industry Articles, Trends and Innovations

Plastic recycling is an important path for tackling plastic waste pollution and advancing resource circularity. After large amounts of waste plastic are collected and crushed, they can be put back into production, reducing the extraction of virgin materials and lowering the environmental burden.

However, waste plastics come in many types. Common recyclable thermoplastics on the market include PET, PC, PP, and PS. Different materials vary greatly in their physical and chemical properties. Once mixed during recycling, if purification and sorting are not carried out, the blending of multiple plastics will directly affect downstream pelletizing and injection molding, constraining the secondary utilization value of recycled materials.

Plastic Color Sorter

plastic flake sorting

The HAWIT Plastic Color Sorter is a practical machine designed specifically for sorting plastic flakes with obvious color differences. It faithfully reproduces material colors and is highly sensitive to off-color and subtly color-different impurities. Compared with high-end models such as NIR and AI deep learning sorters, this color sorter offers higher cost-effectiveness and is well suited to color-based sorting scenarios such as transparent plastic flakes.

👉 To visually demonstrate the sorting effect, we conducted the following live machine test.

Before sorting, we evenly mixed off-color and opaque flakes into qualified transparent flakes to recreate the mixed incoming material conditions typically found in the workshop.

The mixed material was fed into the color sorter and fell smoothly along the chute. The RGB color imaging system captured color differences in the material and, after identifying impurities, removed them quickly with air jets.

Finished product: Transparent clean flakes after sorting — clear and uniform, with colored and opaque impurities thoroughly removed.
Rejects: Mixed materials discharged after sorting — red, yellow, blue, milky-white, and other nonconforming plastic flakes collected together.

Unlike ordinary grayscale-recognition color sorters, RGB color sorting offers full-color recognition — not just distinguishing light from dark, but also identifying subtle color differences. Impurities with weak color differences can also be reliably recognized, consistently safeguarding finished product purity.

✅ Suitable materials: Transparent PET bottle flakes, PC crushed sprue scrap, PP and PS transparent flakes, and various other transparent recycled plastic flakes.

✅ Core advantages

RGB color visual recognition for precise sorting of off-color and milky-white opaque impurities, reducing missed selections
Flexible parameter adjustment: sorting accuracy and carryover ratio can be set as needed, balancing finished product purity and raw material yield
Uniform material distribution along the chute, automated continuous production, reduced manual input, and stable, controllable capacity
Sturdy and durable body, suitable for long-term continuous operation in recycling workshops

For plastic circularity, the purification stage cannot be overlooked. Only clean and stable recycled materials can flow smoothly into downstream manufacturing, truly turning waste plastic into value and delivering pollution reduction and resource savings. Color-sorting purification is an important link in closing the plastic recycling loop and unlocking the value of recycled resources.

We support customers in bringing their own materials for free machine testing, so they can see the sorting effect on site. If you also have transparent plastic flake sorting needs, you are welcome to contact us to schedule a sample test.