Plastic buckets are core containers for industrial liquid storage, agricultural irrigation, and household water storage. Their safety is directly related to the user experience and property safety. Taking an 18L plastic bucket as an example, each bucket must pass 9 rigorous tests before leaving the factory, covering core indicators such as appearance, sealing, and impact resistance, to ensure the reliability of the entire process from the factory to the user.
Ⅰ. Appearance inspection: the first line of quality defense
Purpose: To eliminate defective products and ensure the beauty of the product and the integrity of the basic structure.
Inspection standards:
The bucket has no cracks, color differences, impurities, or bubbles (as shown in Figure 1: Surface defect comparison under a magnifying glass).
The surface cleanliness complies with ISO 9001 industry standards, and the finish must pass the reflection test.
Method:
Manual visual inspection combined with high-intensity lighting assists in ensuring 360° inspection without blind spots.
Ⅱ. Sealing performance test: static and dynamic dual verification
Purpose: To verify the reliability of the sealing design of the bucket and the bucket cover in extreme scenarios.
Test process:
Static sealing: After filling with water, place it horizontally/inverted for 12 hours to simulate the storage and stacking scene.
Dynamic sealing: Fill with water and roll for 10 minutes to reproduce the bumpy transportation state (as shown in Figure 2: Roller test equipment diagram).
Qualification standard:
No signs of leakage, no deformation at the joint between the pail cover and the pail mouth.
Ⅲ. Drop test: “violent experiment” simulating accidental impact
Purpose: To test the bucket’s ability to resist rupture under falling impact.
Test method:
Vertical drop: Drop the bucket vertically from the bottom of the bucket at a height of 1.5 meters to test the bottom structural strength.
Horizontal drop: The bucket hits the ground from the side of the bucket at a height of 1.2 meters to verify the toughness of the bucket wall (as shown in Figure 3: A snapshot of the bucket falling at the moment).
Qualification standard:
No cracks in the bucket, no collapse of the bucket cover, and internal water loss ≤0.5%.
Ⅳ. Stacking strength test: the ultimate challenge of bearing pressure
Purpose: To evaluate the impact of long-term stacking on the stability of the container structure.
Test process:
6 fully loaded water buckets are stacked vertically and continuously pressurized for 7 days at room temperature.
The pail deformation is monitored by a laser rangefinder (accuracy ±0.1mm).
Qualification standard:
no tilt, no bucket dent, and the bottom bucket load-bearing deformation rate is ≤3%.
Ⅴ. Bucket cover strength test: details determine success or failure
Purpose: To ensure the durability of the bucket cover under violent operation.
Test scenario:
Impact test: Stack two buckets, and the upper bucket hits the lower bucket cover from a free fall of 40cm.
Toughness test: Manually fold the pail cover to 90° and observe the cracks.
Qualification standard:
The pail cover has no cracks, and the opening and closing functions remain normal.
Ⅵ. Simulated transport test: 12-hour “bumpy journey”
Purpose: To reproduce the high-frequency vibration and extrusion in truck transportation.
Test method:
5 fully loaded buckets are stacked in five layers and placed on a vibration table to run continuously at a frequency of 5Hz for 12 hours (equivalent to 500 kilometers of road transportation).
Qualification standard:
No collapse of the stacking structure, no leakage or permanent deformation of the bucket.
Ⅶ. Handle hanging test: the ultimate endurance test of the handle
Purpose: To verify the reliability of the connection between the handle and the bucket ear.
Test method:
The fully loaded bucket is hung for 24 hours, and the handle is subjected to a continuous pulling force of about 20kg.
Qualification standard:
The handle does not fall off, and there is no crack or deformation at the connection of the bucket ear.
Ⅷ. Packaging specification inspection: the last guard before leaving the factory
Purpose: to prevent product damage caused by improper packaging during transportation.
Inspection content:
Bucket: 30 pieces/pallet (standard warehouse) or 20 pieces/pallet (small warehouse), PE bag sealing + moisture-proof cable tie.
Bucket cover: 50 pieces/pallet, bubble film-lined carton, secondary protection of PE bag outside.
Random inspection rate: 5% of the packaging integrity of each batch is randomly inspected.
In summary
The production of each plastic bucket has gone through 9 rigorous tests. From millimeter-level appearance defect screening to 12-hour high-intensity transportation simulation, we have redefined the benchmark of durability with a breakage rate of 0.03% (the industry average is 0.15%). This almost harsh persistence is not only the ultimate pursuit of production technology, but also a solemn commitment to user safety.
We are well aware that the confidence of quality comes from openness and honesty. We sincerely invite you to visit the factory, observe the watertightness of the sealing test at close range, witness the “violent aesthetics” of the drop test, and even participate in the toughness test of the bucket cover. If verification is required, we can provide free sample testing – use your own way to test our standards.
