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Spanish When vehicles reach end-of-life, their bumper shells — often made of plastics like PP (polypropylene), TPO, etc. — are removed and then passed through a car bumper recycling shredder. The powerful shredder can cut, tear and grind these plastic parts (after metal‐reinforcement and attachments are removed) into manageable fragments that can be washed, dried, granulated and re-used as raw material for new plastic products.
Shengzhong Car Bumper Recycling Shredder
Shengzhong ‘s dual-shaft machines are designed for heavy duty usage — low-speed, high-torque operation, wear-resistant blades, and robust structural frames. Our powerful shredders can handle plastics, metal, mixed materials and challenging feeds, including car bumpers.
We provide OEM/ODM services and can tailor our shredder machines to suit the dimensions, feed requirements and output specifications of your bumper recycling line. For instance, hopper dimensions and rotor size can be adapted. This means we can configure machines to accept full bumper shells (rather than only smaller lumps), integrate conveyors, and achieve desired fragment sizes for your downstream processes.
Features:
- The hopper can accommodate large waste, such as full bumper shells.
- Dual‐shaft intermeshing cutters, low RPM (e.g., 10-20 rpm) with high torque transmission.
- We utilise hardened alloy steel blades, suitable for mixed material feeds.
- Designs accommodate metal inserts or mixed plastics; sensors or reverse mechanisms prevent overload.
- Equipped with PLC control, emergency stop, safety guarding, overload protection.
- Can be integrated with feed conveyors, discharge conveyors, separators, granulator interface.
Key Technical Specifications of Common Car Bumper Recycling Shredder
Motor Power: The power of the electric motor is a primary determinant of the shredder’s throughput and ability to handle tough materials. For this application, motor power typically ranges from 18.5 kW to 370 kW, which translates to approximately 25 hp to 500 hp . Machines at the lower end are suitable for smaller operations, while those at the higher end can handle a continuous, heavy-duty stream of bumpers.
吞吐能力: The processing capacity is directly related to motor power and the design of the cutting chamber. For single-shaft and double-shaft shredders suitable for bumpers, typical capacities range from 250 kg/hour to 2,000 kg/hour (0.25 to 2 tonnes/hour) . High-capacity dedicated lines can achieve higher rates, with some systems processing up to 9,600 tons per month when integrated into a full plant .
Output Particle Size: The final size of the shredded material is a critical parameter, as it is determined by the requirements of the downstream recycling process. This is controlled by the size of the perforations in the output screen. The typical adjustable range for the output particle size is from 5 mm to 250 mm. A common range for further processing is between 30 mm and 150 mm. Finer grinding to under 20 mm often requires a secondary machine, such as a granulator.
The Recycling Workflow: From Bumper to Pellet
Here’s a step-by-step workflow of how car bumpers are processed with shredder in a recycling line:
Step 1: Collection & Pre-Separation
The used bumpers (front or rear) are collected from vehicles or salvage yards. Before shredding, large metal parts (reinforcement bars, screws, brackets) are manually or mechanically removed to avoid damaging shredder blades and contaminating the plastic stream.
Step 2: Primary Shredding (Size Reduction)
The cleaned bumper shells are transported into a dedicated shredder (commonly a dual-shaft or twin-shaft machine). This machine cuts the plastic into manageable pieces (often around 40 mm) using slow-rotating, high-torque shafts with hydraulic pushers.
Step 3: Cleaning & Further Reduction
After shredding, the material may be washed, dried, and further processed via granulators or crushers to reach smaller sizes (e.g., 3–12 mm) suitable for melting and pelletising. Metals or other contaminants are removed using magnetic rollers or eddy-current separators.
Step 4: Pelletising / Re-Manufacturing
The cleaned, shredded plastic is melted and filtered, then pelletised into raw material for injection moulding or blow moulding. In some cases, recycled bumper plastic is used to make new bumpers (with about 7% glass fibre and PBT material added) or other plastic products like geogrids or building materials.
Step 5: End-Use
The pellets are supplied to manufacturers — including automakers or parts suppliers — ensuring a circular economy loop: waste bumper → recycled pellets → new component.
Why Recycling Car Bumpers Makes Sense?
Modern vehicles typically have plastic outer bumper covers mounted over a metal reinforcement bar. As more cars reach end-of-life, the volume of discarded bumpers continues to grow — so transforming these waste elements into useful material is both an environmental and commercial opportunity. Recycling bumpers reduces landfill or incineration of plastics, cuts demand for virgin plastic, and opens up a revenue stream by turning waste into granules or pellets usable in injection moulding, building materials, or even new automotive parts.
