BAOYI is experienced in the design and analysis of wiper blade structures for optimum distribution of wiping pressure on the windshield surface. BAOYI uses state-of-the-art experimental and computational mechanics tools to generate the best designs for our distroibutors and OEM customers. Computerized product design and development are used to aid in decision making prior to manufacturing.
COEFFICIENT OF FRICTION
The frictional coefficients obtained are used to predict wear, chatter, squeal and energy consumption, as well as to compare various surface treatments.
DURABILITY TESTING
Durability testing to 1,500,000 cycles helps define the life prediction of your wiper blade, your wiper blade's wipe quality and your super structure.
To test the initial wipe grade, wiper blades are cycled on a specially constructed wiper test buck. A new glass windshield is used and is painted black on the inside to help enhance the viewing of any surface defects caused by a poor performing wiper blade. The wiper blades are graded on a scale of 1-10:
Wiping Performance Grade | ||
Grade | Cleanliness situation in the wiping area | |
9 | No water marks, no noise, no shake | |
8 | 1 or 2 small stripes (less than 3mm), do not stay more than three seconds, no noise, no shaking. | |
7 | 3 or more small stripes (less than 3mm), do not stay more than 3 seconds, wiping will evaporate within 1 second, no shaking. | |
6 | Spot to stay within 1-3 seconds, but there is a small fringe (less than 3mm) to stay more than 3 seconds. | |
5 | 6mm width or less slight jitter, or 3-6mm stripes, spots to stay at least 3 seconds. | |
4 | 25mm wide or less rod-like stripes, or 25mm small stripes, spots to stay more than 3 seconds or more. | |
3 | Above 25mm rod-like stripes, or more than 25mm small stripes, spots to stay more than 3 seconds or more | |
2 | Some area no wiping, big spot drops and stripes. | |
1 | Most parts of area no wiping. | |
Wiping Performance Requirement | ||
No. | Item | Grade |
1 | Early wiping | ≥ 8 |
2 | After 50*10000 times | ≥ 6 |
3 | After 100*1000 times | ≥ 5 |
4 | After 150*10000 times | ≥ 6 |
OZONE TESTING
Ozone testing is done not only to prove a product passes ozone standards but to provide a time line of rubber deterioration and determine if premature rubber cracking will occur.
PERMANENT SET TESTING
Permanent set is the first test a manufactured wiper blade must pass and is the most critical. When sitting on a windshield for an extended period of time, wiper blades can form a permanent set. Wiper blades must have a low permanent set to guarantee proper blade flipping over the life of the blade.
SALT SPRAY TESTING
Salt spray testing is an advanced corrosion test that evaluates the durability of coatings on super structures, fastener/clip integrity, paint and rubber integrity.
SUPER STRUCTURE TESTING
Complete wiper blade super structures can be tested at temperatures from -30°F to 120°F. BAOYI's super structure testing can include simulated snow and ice slap testing, specular gloss measuring on surfaces and continuous pressure pattern testing.
Our BAOYI WIPER BLADE TESTING REPORTS
INSPECTION REPORT No.: 20160908-A
No. | Item | Regulation | Result | |
16" | 26" | |||
1 | Appearance | Appearance no uneven, abrasion and other damage, no sharp corners. | OK | OK |
2 | Metal parts must be protected against corrosion, made of a material which having corrosion resistance. | OK | OK | |
3 | Electroplated coating uniformity, not to expose the interior, no obvious cracks and other harmful defects. | OK | OK | |
4 | Metal painting, plastic coating should be uniform, no bubbles, stacked, sagging. | OK | OK | |
5 | The exposed surface should be no dazzling phenomenon. | OK | OK | |
6 | Rubber strip and the surface of the spoiler should be smooth, flat, no scratches, cracks, scraping blade no gap. | OK | OK | |
7 | Structure | Wiper and wiper arm is connected with the spring steel, rubber strip should fit tightly, reliable, replacement easily, no loose and obvious deformation when wiping. | OK | OK |
8 | Each component should be easy to dismantle, the same type of component should be capable of being fitted to each other, after the parts are interchangeable, under normal operating conditions, there is no shaking. | OK | OK | |
9 | Spring steel pressure exerted by the corresponding center of the curve, after flattening, the gap should be less than 0.3mm. | OK (0.20mm) | OK (0.24mm) | |
10 | Wiper arm on the wipers should be consistent with the average pressure: aftermarket replacement installation, the average pressure can not less than 0.09N / cm. | OK (0.12N/cm) | OK (0.11N/cm) | |
11 | Wipers various components rivets and other fasteners should be tightened and reliable. | OK | OK | |
12 | Wiping Performance | Early wiping: Wiper performance should be more than 8 grade. | 9 grade | 9 grade |
13 | Durablity | Wiping 50*10000 times, wiping performance should be above 6 grade. | 7 grade | 7 grade |
