Silicone Bellows, also known as Silicone Dust Cover and Rubber Expansion Joint & Boots, are designed as a cover or expansion bellows which have versatile functions as silicone “dust boots” or seals, elastomeric expansion joint, used to seal out dust and other light-duty environmental factors while allowing a specific stroke or predetermined range of motion. They are quite common in industrial and automotive applications.
Silicone Bellows are usually produced by silicone rubber compression molding, extrusion moulding or rubber injection moulding.
As for the Bellows Suction Cup, we have some types can be sold to you directly like our attached file shows, please check for details:
Silicone Bellows' major defects made by others
Reasons of Silicone 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 Bellows Main Material
|Material ||Abbreviation ||Temperature Range ||Aging Weathering, Ozone ||Anti-Oil & Grease ||Anti Water Swell ||Flex-Fatigue ||Economy of Material ||Material Notes |
Chloroprene & Neoprene
|CR || |
-40F to 250F
|Good ||Good ||Average ||Excellent||Good||Exprosure to refrigerants, can be compounded for FDA applications |
|Nitrile ||NBR ||-22F to 212F||Poor ||Excellent||Good ||Good||Excellent||Excellent resistance to petroleum based oils and hydrocarbon fuels |
|Ethylene-Propylene || |
|-60F to 300F||Excellent ||Poor ||Excellent||Good||Excellent||/ |
|Silicone ||VMQ ||-75F to 450F||Excellent||Average ||Excellent||Excellent||Average||Medical and aerospace applications |
|Fluorocarbon ||FKM ||5F to 390F||Excellent||Excellent||Good||Average||Poor||/ |
Silicone Bellows Shape
Miniature Rubber Bellows Tapered Rubber Bellows
Rubber Flange Bellows Square Rubber Bellows
Silicone Bellows Advantages:
1. Anti-ozone and weather resistance
2. Aging & corrosion resistance
3. Waterproof and steam resistance: bathroom equipment, auto radiator && brake system.
Our company advantages for silicone bellows manufacturing process:
1. Precision Own Mold-making Technology since 1998:
2. In-depth knowledge of different elastomer rubber materials molded for expansion joint & boots
3. Mature experience of flexible silicone rubber bellows quality controls:
a. Silicone Rubber bellows wall thickness sizes telorance: less 0.05mm
b. mini or less expansion joint flashing
c. mold maintenance in aim to up and down mold plate with horizontal stripe in exact position
d. good ejected molding to improve silicone bellows production efficiency
4. Rapid prototyping with full sizes production equipment and production materials.
5. In-depth knowledge of overmolded metal + silicone rubber bellows production