Automotive Interior Shredder

Automotive Interior Shredder: A Key Equipment for Automotive Solid Waste Treatment in RDF/SRF Production

In the field of automotive dismantling and solid waste resource utilization, the automotive interior shredder is a core piece of equipment bridging automotive interior waste treatment with RDF (Recycled Distillate Fuel) and SRF (Solid Recycled Fuel) production. Automotive interiors contain a variety of mixed materials, including plastics (PP, PE, PVC), polyurethane foam, synthetic fabrics, leather, and wood panels, often interspersed with metal connectors. This equipment can specifically shred these complex wastes into uniform particles of 10-50mm, providing pre-treated materials that meet RDF/SRF production standards for subsequent sorting, drying, and molding processes, significantly improving the energy utilization rate of automotive interior solid waste.

The core structure of the equipment is designed around "adapting to multi-material shredding + meeting fuel production requirements," including a multi-functional feeding system, a composite shredding system, an intelligent sorting auxiliary system, and a temperature-controlled discharge system. The feeding system employs a stepped feeding hopper, coupled with an adjustable hydraulic pusher, capable of stably conveying large interior trim pieces (such as seats and dashboards) while controlling the pushing force to prevent metal impurities from impacting the blades. The composite shredding system adopts a two-stage structure of "dual-axis coarse shredding + single-axis fine shredding." In the coarse shredding stage, high-torque alloy blade rollers shear large pieces of interior trim, breaking down the connecting structures between mixed materials. In the fine shredding stage, fine-toothed blades refine the material into uniform particles. The blade surface is treated with a wear-resistant coating, which can simultaneously handle the toughness of plastics, the bulkiness of foam, and the fibrousness of leather. The intelligent sorting auxiliary system is equipped with a magnetic sorting device at the bottom of the shredding chamber to initially separate metal connectors in the interior trim, reducing subsequent sorting pressure. The temperature-controlled discharge system uses an air-cooling device to control the material temperature during the shredding process, preventing plastics and foams from melting and sticking together due to frictional heat, ensuring that the moisture content and bulk of the discharged material meet the requirements for RDF/SRF preparation. During operation, automotive interior waste enters the coarse tearing chamber through the feed hopper. Dual-shaft cutter rollers crush it into blocks smaller than 100mm, which are then conveyed to the fine tearing chamber for further refining to the target particle size. During this process, a magnetic device separates metallic impurities. Finally, after air cooling and temperature control, the material is discharged from the outlet, completing the pre-treatment process.

Compared to ordinary solid waste shredders, this equipment boasts three core advantages in RDF/SRF production scenarios: First, it offers strong material compatibility. Its two-stage shredding structure and wear-resistant blade design allow for the simultaneous processing of more than six types of automotive interior materials, achieving a shredding qualification rate of over 95%, eliminating the need for batch processing. Second, it offers high fuel adaptability. Through precise particle size control and temperature control, the output material particle size deviation is ≤5mm, and the moisture content is controlled below 15%, directly meeting the material standards before RDF/SRF forming and reducing subsequent processing steps. Third, it offers excellent energy efficiency. Utilizing a variable frequency dual-motor drive, it automatically adjusts the speed according to material hardness, achieving a processing capacity of 800-1500kg per hour. Unit energy consumption is 20% lower than that of general-purpose shredders, and the magnetic sorting function reduces metal wear on subsequent equipment, extending the overall production line lifespan.

Operation and maintenance must be strictly controlled in accordance with RDF/SRF preparation standards: Before starting the machine, the gap of the fine shredding blades must be adjusted according to the target fuel particle size, and the adsorption strength of the magnetic sorting device must be checked; when processing interior parts containing a large amount of foam (such as seat fillings), the feeding speed must be reduced to avoid the foam from becoming fluffy and causing the cavity to become blocked; in daily maintenance, the residual fibers and foam debris in the shredding chamber must be cleaned weekly to prevent accumulation from affecting heat dissipation; the blade wear must be checked monthly, and when the blade wear exceeds 2mm, it must be ground and repaired in time; the hydraulic feeding system and sorting device must be calibrated quarterly to ensure that the equipment stably outputs pre-treated materials that meet the requirements. Currently, this equipment has been widely used in automobile dismantling plants and solid waste energy treatment centers, becoming a key pre-treatment equipment for converting automotive interior solid waste into clean fuel, helping to achieve the dual goals of "reduction and energy conversion of automotive solid waste".