Flexible Dust Proof Boot Cover Rubber Bellows

• Customization: Available
• Material: Silicone Rubber
• Capability: Acid Alkali Resistant Rubber Hose
• Model NO.: 2
• Materials: Rubber, Silicone, EPDM, Nitrile, FKM, Neoprene
• Forming: Rubber Compression&Injection Molded
• Hardness: 30-90 Shore a
• Function: Anti-Dust & Water & Oil & Grease & Acids etc
• Applications: Machinery, Automobile, Medical Device etc.
• Working Temperature: -40c~230c
• Design Type: Tapered, Straight, Metal Rubber Overmolding etc.
• Surface Finish Process: EDM, Matt Smooth
• OEM&ODM: Yes
• Typical Applications: Expansion Joint, Covers, Sealing etc.
• Transport Package: PP Bags, Carton Boxes
• Specification: SGS, ROHS, FDA etc.
• Trademark: Better
• Origin: Xiamen, China
• HS Code: 39241000
• Production Capacity: 100, 0000/Month

Product Description

Customized Neoprene Nitrile EDPM Silicone Rubber Bellows
Rubber Bellows are used as a cover or expansion joint to protect device or machines, which are made by rubber compression molding, rubber injection mold or extrusion tool.
Rubber Bellows are designed as a cover mainly protect against dust, water, oil, grease, acids, bleaches, spatter or other environment elements.


Rubber Bellows Main Structions and Shapes



 Straight Convolution Rubber Bellows                Spiral Convolution Rubber Bellows          



Concentric Rubber Bellows                                          Tapered Rubber Bellows

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 Bellows Materials adoption

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

Rubber Bellows Design Guide


Rubber Bellows Some Typical Applications
Expansion joints
Rod & Ball screw covers
Piping penetration seals
Fan duct connections
Compressor and engine intake and exhaust manifold connections
Different Silicone Rubber Bellows durometer demands, surface demands, parting lines demands or rubber flashing demands have different production difficulty and production cost. Epecially for mold-making technology demands, compression mold steel choice, mold maintain when mass production etc.


Custom Rubber Expansion Bellows Requirements:
1. Offer 2D, 3D design drawings or samples, and also tell us your sizes telorance demands.
2. Bellows Materials Demands: Rubber, Silicone, EPDM, Nitrile, etc, or tell us operating environments, functions etc.
3. Durometer Demands (Hardness Shore A): 
4.. Silicone Bellows Surface Demand
5. Working Environmment Demands
6.Silicon Bellows Flashing Demands etc.