Every trash can leaving our factory must survive a gauntlet of destructive and non-destructive tests to ensure it can withstand real-world abuse. Dent resistance is not just a checkbox; it’s a promise of long-term durability. Here is our systematic approach to testing each can before it ever reaches your doorstep.
1. Material Incoming Inspection
Before any can is formed, coil steel or heavy-duty plastic resin is pre-screened. For metal cans, we measure Rockwell hardness (HRE scale) on raw steel sheets. If hardness falls below 85 HRE, the batch is rejected—softer material cracks under impact. For plastic cans, we test impact resistance using a Charpy pendulum at -20°C to simulate cold-weather brittleness.
2. Drop Impact Simulation
Each production batch randomly selects 2% of finished cans for a two-stage drop test:
- Stage A: The can is loaded with 30kg of sand (representing typical household waste weight) and dropped from 1.5 meters onto concrete. Only cans with zero visible dents pass.
- Stage B: The same can is dropped from 2 meters onto a steel plate. Acceptable threshold: dent depth ≤ 1mm on side walls, ≤ 0.5mm on rim edges. Any deeper dent triggers a full batch retest.
3. Pendulum Impact Load Test
We mimic accidental kicks or collisions with a custom swing-arm device. A 10kg steel weight, shaped like a boot heel, swings into the can’s side at 3m/s. We measure residual deformation with a laser profiler. To pass, the can must retain at least 95% of its original cross-sectional shape. This test is repeated at four positions: middle, upper rim, lower base, and handle attachment area.
4. Vibratory Fatigue Simulation
Cans that survive static impact must also endure vibration frequencies from 5 to 100 Hz (typical of truck transport). Each corner of the can is clamped to a shake table, and the can is filled with 20kg of metal bearings. After 2 hours of vibration, we inspect for stress whitening on plastic cans or micro-dents on metal ones. Any sign of fatigue means design modifications before manufacturing.
5. Real-World Edge Case Destruction
Our most aggressive test: a hydraulic press applies 500N of force directly to the can’s lid rim (the weakest area). The can is placed on an angled surface to simulate hitting a curb. If the lid seal fails or the rim buckles more than 2mm, we enforce a stronger double-rolled rim design for future production.
Once production models pass these tests, every unit gets a final visual inspection with a gauge for surface flatness. Only cans with zero visible dents and flawless powder coating are packaged. The factory’s rejection rate stays below 0.5%—every dent stopped at the source means one less headache for our customers.
