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Working principle of waste plastic cans optical sorting machine:

The operation of the optical sorting machine is based on the closed-loop process of "optical signal acquisition-image analysis-intelligent execution". The specific principles are as follows:

1. Material pretreatment and transportation
After pretreatment such as crushing, cleaning, and drying, the materials to be sorted (such as plastic bottles and cans) enter the detection area in an orderly manner through a conveyor belt or vibrating feeder to ensure that the materials pass through the optical detection point in a single flow state.
2. Optical signal acquisition
Light source irradiation: The equipment is equipped with a dedicated light source (such as LED white light, infrared light, ultraviolet light), and the wavelength is selected according to the characteristics of different materials. For example:
Infrared light is used to distinguish plastic materials (PET, PE, PP, etc., different materials have different absorption and reflection characteristics of infrared light);
Visible light is used to identify color differences (such as transparent plastic bottles, brown bottles, silver cans).
Image capture: High-speed CCD/CMOS image sensors collect optical images of materials in real time, and simultaneously record color, brightness, reflectivity, surface texture and other characteristics (such as the difference between the metallic luster of cans and the transparent characteristics of plastic bottles).

The core advantages of waste plastic color optical sorting machine:

1. High-precision sorting to improve the purity of raw materials
Using high-resolution image sensors and advanced algorithms, it can identify micron-level color differences and material characteristics, and the removal rate of mixed color particles is ≥99%. The purity of the material after sorting is significantly improved, meeting the production needs of high-end recycled plastics (such as food-grade PET recycled particles).

2. Efficient automation, reducing labor costs
The processing capacity can reach more than 30kg/h (depending on the model), which is far higher than the efficiency of manual sorting, and can run continuously for 24 hours, reducing manual participation, labor intensity and labor costs, especially suitable for large-scale recycling scenarios.

3. Intelligent operation and strong adaptability
Equipped with an intelligent touch screen and remote monitoring system, it can customize sorting parameters (such as color threshold, material type), adapt to waste plastic materials from different sources (such as PET, PE, PP, PVC, etc.), support simultaneous sorting of multiple categories, and high flexibility.

1. Plastic materials
Complete plastic bottles: mineral water bottles (PET), beverage bottles (PET/PE), cooking oil barrels (HDPE), shampoo bottles (PP), etc., sorted by material, color, and transparency.
Broken plastic flakes: Flake materials after plastic bottles are broken, remove label paper, metal cap residues, and glass fragments, and classify them by material (PET flakes, PE flakes).
Recycled plastic particles: particles after plastic bottles are recycled and granulated, detect color uniformity and impurities (black particles, foreign matter), and improve particle quality.
2. Metal packaging
Complete cans: aluminum cans (such as cola cans), iron cans (some beer cans), sorted by metal material, rusty and deformed cans are removed.
Broken metal pieces: metal fragments after the cans are broken, distinguishing aluminum and iron (can be combined with magnetic separation), and removing non-metallic impurities such as plastic labels and dust.
3. Mixed recycled materials
Plastic-metal mixed waste: such as a mixture of beverage bottles and metal caps, the plastic bottle body and the metal cap are separated by optical differences.
Recyclable household waste: In garbage sorting, plastic bottles and cans are identified and sorted out to improve resource recovery rate and reduce landfill.