Background Introduction

More than 2 million tons of scrapped car bumper plastic are generated globally each year, and traditional chemical soaking or manual polishing face three major challenges: low efficiency, high pollution, and significant material loss. The ‘Crushing Friction Washing Dehydration Integrated System’ innovatively developed by WANROOE Machinery achieves a 99% paint removal rate through physical peeling technology, helping to upgrade the recycled plastic industry.

Detailed explanation of core technology process

The entire system adopts a physical recycling process of “crushing friction peeling deep cleaning”, which does not require chemical reagents throughout the process. Firstly, the pre processed bumper fragments are automatically fed through an anti winding intelligent conveyor belt. The surface of the conveyor belt is designed with a wavy baffle to prevent plastic sheets from getting stuck, and is equipped with an infrared sensing device to automatically adjust the feeding amount according to the processing speed of the rear equipment, ensuring the continuous and stable operation of the production line.

Bumper conveyor belt

The material enters the next stage of the crusher to complete fine crushing. Special alloy cutting tools use cross cutting to crush large bumper blocks into uniform fragments. The crushing bin is equipped with a screen to control the particle size of the discharged material in real time, avoiding excessive fragments from affecting the subsequent cleaning effect.

Bumper crusher

The broken plastic sheets are transported by a conveyor belt to the core module – a multi-stage friction cleaning system. In the high-speed rotating spiral friction chamber, fragments collide violently with ceramic friction media in turbulent water flow, and the surface paint is peeled off layer by layer by mechanical force. The variable frequency motor can accurately adjust the friction strength, ensuring cleaning efficiency and avoiding damage to the plastic substrate.

The fragments that have completed paint peeling immediately enter the stepped rinsing dehydration linkage unit. The rinsing tank adopts a three-stage reverse flow design, and the fragments roll forward step by step on the inclined sieve plate, continuously flushing and removing residual paint residue; The centrifugal dehydrator at the end quickly removes surface moisture with a centrifugal force of over 2000G. The humidity of the processed fragments is lower than industry standards and can directly enter the drying process, greatly reducing the time required for traditional drying.

Cleaning and dehydration of bumper debris

In the end, clean and dry plastic fragments are stored in a centralized silo and connected to a fully automatic ton bag packaging machine at the bottom, achieving a fully enclosed process from recycling to finished product packaging, ensuring that recycled plastics meet high-end application grade purity requirements.

Processing videos