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Sourcing Offshore Manufacturers

Benefits of Sourcing Offshore Manufacturing Cheap labor is virtually synonymous to offshore manufacturing. To be competitive on the global stage, corporations need globally competitive prices. For some, saving costs on their supply chain might be the saving grace of their business. There are risks to sourcing from offshore manufacturers, but if you educate yourself and […]

NVH Rubber Bumper Design: A Case Study

NVH Rubber Solution: Rubber Bumper Case Study A while back one of our customers was designing a rubber part for an automotive OEM and was looking for solutions to the rubber part’s squeaking problem. This part was meant to be a shock absorber on a vehicle bodyside, but previous iterations of the rubber bumper made […]

Why Rubber Is Used As Vibration Absorbers

Why Is Rubber Used As Vibration Absorbers? Rubber is used as vibration absorbers, because rubber has a relatively high shear modulus compared to other materials. That means when a rubber material is shear stressed, i.e. stressed parallel to its cross-section, rubber can be stressed more before it becomes permanently deformed. In other words, when stress […]

Which Rubber is Fire Resistant

What Are the Fire Resistant Rubber? Neoprene, Viton, and silicone are all fire resistant rubber. Neoprene’s Fire Resistance Although Neoprene was designed for its various oil and chemical resistant properties, Neoprene can also withstand burning and high temperatures. Neoprene is rated for operating temperatures up to 200°F. When heated past 200°F, Neoprene may stiffen. Neoprene […]

Rubber Deterioration in an Air Oven – Test Method

Classification Systems are important for making good quality rubber products.  ASTM – Rubber Guidelines are necessary in ensuring that proper values are not only repeatable but accurate in an lab environment.  Coi Rubber also recommends other testings just as JIS, MILSPEC, and many other OEM guideline, however, a proper ASTM – Rubber Guildline must be […]

Rubber Property – Effects of Liquids – D471

This standard is issued under the fixed designation D 471; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision […]

ASTM – Rubber Guidelines

What is ASTM – Rubber Guidelines? The ASTM has over 12,000 standards.  Within those standards, we’ll focus mostly on the D-2000.  This is a classification system that covers the properties of vulcanized rubber materials (natural rubber, reclaimed rubber, and so much more.).  This not limited but are designed around the automotive standards.   What else does […]

Rubber Durometer of Rubber Hardness

In the rubber business, one of the most common terms you will encounter is rubber durometer.  Durometer is both a measure of hardness of the material and the instrument used to measure it. A rubber durometer can be used to measure the hardness of not only solid rubber but also cellular rubber (e.g. foams, sponges), plastics, […]

Hot VS. Cold Runner Molding Systems

With the increasing cost of steel and raw materials, supply chain professionals are often looking for options to reduce part prices, cycle times, and material waste. Cold runner systems may be a cost saving solution in contrast to typical hot runner systems for the right application. Difference Between Cold Runner & Hot Runner Hot runner […]

Rubber Product Design Guidelines

Introduction Rubber molding processes, such as extrusions, compression molding, or injection molding, take liquid raw rubber into a mold where the rubber is then cured into the mold shape by heat and pressure. As such, the mold cavity is cut to represent the desired geometry of the molded rubber product. Products such as o-rings, seals, […]

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