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Xiamen Juguangli Import & Export Co., Ltd
Home > products > Silicone Rubber Sleeving > High Performance Customized NBR Flexible Rubber Bellows

High Performance Customized NBR Flexible Rubber Bellows

Product Details

Place of Origin: CHINA

Brand Name: OEM

Certification: SGS,ROHS,ISO

Model Number: OEM

Payment & Shipping Terms

Minimum Order Quantity: 2,000PCS

Price: USD, Negotiation

Packaging Details: PE+Carton

Delivery Time: 7~15 work days

Payment Terms: T/T, L/C, , Western Union,Paypal

Supply Ability: 300,000pcs

Get Best Price

Customized Flexible Rubber Bellows


NBR Flexible Rubber Bellows


Neoprene Moulded Rubber Bellows

High Performance Customized NBR Flexible Rubber Bellows
Neoprene Bellows,Customized high performance neoprene silicone nbr fkm rubber bellows

Product Introduction


Neoprene Bellows, also known as, CR bellows, neoprene dust cover and neoprene expansion joints, 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.


Neoprene Bellows are usually produced by silicone rubber compression molding, extrusion moulding or rubber injection moulding.


Product Specifications


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



-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 /


Product Pictures


High Performance Customized NBR Flexible Rubber Bellows 0


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 too


Neoprene Bellows Shape

High Performance Customized NBR Flexible Rubber Bellows 1

Neoprene Bellows Properties:

Neoprene also known as choloprene, it is a common material used in rubber bellow and dust boot applications with many good performance:

1. Good oil & grease resistance

2. Good Tear Strength, compression & abrasion resistance

3. Excellent Refrigerants / Ammonia performance

4. Temperature Range (dry heat): -40F to 250F

While neoprene has poor cold & fuel resistance, if the rubber bellows requires good cold & fuel resistance, should use other material.


High Performance Customized NBR Flexible Rubber Bellows 2

High Performance Customized NBR Flexible Rubber Bellows 3

High Performance Customized NBR Flexible Rubber Bellows 4


Our company advantage for Neoprene Bellows manufacturing process:


1. Precision Own Mold-making Technology since 2004

2. In-depth knowledge of different elastomer rubber materials molded for rubber bellows, expansion joint & boots

3. Mature experience of flexible silicone rubber bellows quality controls:

a. Neoprene 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