by Dianna Brodine, managing editor, Inside Rubber. Originally appeared in Inside Rubber Magazine, January 2019
Molded Dimensions LLC has been in business since 1954. The company moved to Port Washington, Wisconsin, in 1973, where it has grown into a 100+-employee, three- shift facility with four separate divisions: rubber, cast urethane, moldmaking and strategic sourcing. President Mike and CEO Linda Katz purchased the business in 2001, and its project base focuses on low- to medium-volume custom manufacturing. This niche serves Molded Dimensions well, keeping its customer portfolio diversified and ensuring a continuous stream of interesting technical projects.
A gasket is a mechanical seal that fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. Continue reading
A grommet is a ring or edge strip inserted into a hole through thin material, typically a sheet of textile fabric, sheet metal or composite of carbon fiber, wood or honeycomb. Continue reading
Today, at the Movin’ On 2017 Conference, Michelin unveiled Vision, a new concept tire that gives consumers exactly what they need, when they need it. Continue reading
Have you ever thought about how much rubber is used in your daily life? Neither had we, until today. So we asked ourselves: What would a life without rubber look like? Continue reading
One of the most important items in the design for manufacturability process is selecting the lowest cost rubber or urethane material capable of meeting the application requirements. Design Engineers are often not elastomer experts, although they have the most direct impact on part cost. Certainly you could choose a fluoroelastomer for a simple wire grommet application in ambient temperatures with no chemical or fluorocarbon exposure, and it would function. But why would you spend upwards of $15 per pound on material when you could spend $3 per pound to do the same job? Molded Dimensions believes in not over specifying the elastomeric material. Choosing a cost effective rubber or urethane compound not only saves money at project start up, but keeps on giving for the life of the project. Continue reading
Multiple components make up the rubber formula or recipe. The biggest component and determining factor is the base polymer. The base polymer might be Nitrile, Neoprene, EPDM or Natural Rubber for example. This determines many of the formula’s physical properties and is also the biggest cost driver within the formula. Continue reading
NATURAL RUBBER (NR) Natural Polyisoprene
Advantages: Outstanding resilience; high tensile strength; superior resistance to tear and abrasion; excellent rebound elasticity; good flexibility at low temperatures; excellent adhesion to fabric and metals.
Limitations: Poor resistance to heat, ozone, and sunlight; very little resistance to oil, gasoline, and hydrocarbon solvents. Continue reading