Complaint
Reasons of Rubber Bellows' major defects:
1. Flashing is too big: to solve this problem, we need to pay attention to 3 points when production; the first one is mold-design, second one is workers' skill about removing flash, and the production technology is also very important, if molding pressure is not enough, will also make the flash hard to be removed.
2. Mold misalignment & uneven wall: this problem mainly caused by mold tool, like mold-making precision, misalignment of upper mold and down mold, datum angle & the 4 located pins are not accurate enough.
3. Lip cracking: the situation is relative to raw materials hardness & durometer, products' structure, and die-cutting tool.
| RUBBER COUMPOUNDS TYPES AND REFERENCES | ||||||||
| Material | Abbreviation | Temperature Range (dry heat) | Aging Weathering Ozone | Oil& Grease Resistance | Water Swell Resistance | Flex-Fatigue | Economy of Material | Material Notes |
| (Neoprene) | CR | -40F to 250F | Good | Good | Average | Very ood | Good | exposure to refrigerants, can be compounded for FDA applications |
| Nitrile | NBR | -22F to 212F | Poor | Very Good | Good | Good | Very Good | Automotive Applications, Good Oil Proof |
| Ethylence-Propylene | EPDM,EPM | -60F to 300F | Very Good | Poor | Very Good | Good | Very Good | Outside Applications, Good Weather Proof |
| Silicone | VMQ | -75F to 450F | Very Good | Average | Very Good | Very Good | Average | Medical Applications |
| Fluorocarbon | FKM | 5F to 390F | Very Good | Very Good | Good | Average | Poor | Rubber King, Widely Applications |
