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MOLDED DIMENSIONS, LLC
Custom Molder of Rubber and Cast Polyurethane Components.

Pedals – MDI Products in Action

Posted on April 13, 2018 by The Molded Dimensions Team

To the left is an example of a custom molded foot pedal used in large excavation equipment. The chemically-bonded urethane pad exhibits wear resistance, making it look better and last longer despite highly abrasive environments.

 

  • Material Compound: Most pedals are made with 80 Durometer Shore “D” Black Pentathane®. Hardness, as applied to elastomers, is defined as the relative resistance of a surface to indention by an indenter of specified dimension under a specified load. The most commonly used measuring instrument is a durometer. Numerical hardness values are derived from the depth of penetration. The harder the sample, the further it will push back the indenter point and the higher the readings. On the durometer A scale, 0 is very soft, and 100 is very hard. Values are usually read immediately after firm contact has been established. The hardness range of elastomers is so broad that a single durometer cannot indicate practical measurable differences of hardness. For this reason durometers are available in more than one scale model, (eg., A and D scale durometers). The A scale durometer is widely used throughout the rubber industry. The durometer D model, which has a stiffer spring and a more pointed indenter, is used to measure the hardness of hard rubbers.
  • Special characteristics: abrasion and cracking resistance helps keep the pedal looking brand new for years to come.

Urethane Restoration Team: Temperature Variation Matters

Posted on October 23, 2017 by The Molded Dimensions Team

Part Three

Continue reading


Molded Dimensions Team Earns Best Technical Paper

Posted on September 18, 2017 by The Molded Dimensions Team

2017 Best Technical Paper

by Linda Katz, Molded Dimensions, Inc., PMA President Continue reading



Polyurethane Has Many Unique and Desirable Properties as a Thermoset Elastomer

Posted on January 15, 2016 by Nick Cusatis

screen-shot-2015-07-31-at-9-33-35-amWritten By: Tony Lukas

Material Properties
Millable urethane rubber is available in hardnesses ranging from approximately 30A-90A.  While castable urethanes cover this range, they also can be formulated slightly lower and significantly higher.  In the range of 30A-70A, millable urethane rubber has superior physical properties to castable urethane, primarily tensile and abrasion resistance.  At these lower hardnesses, millable urethane takes advantage of reinforcing fillers to build strength while castable urethanes often need to be plasticized to reach durometer readings below 55A.  Once the hardness gets above 70A, and up to 75D, the tensile values of castable urethane start to catch up and surpass millable urethane.  This can also translate into increased load bearing properties and superior abrasion resistance with castable urethane. Continue reading

A PEEK AT OUR PARTS

Pentathane Applications - Wipers Wiper used to material handling in food processing equipment. This material is both FDA approvable and abrasion resistant for durability.
Pentathane Applications - Wheels Pentathane® chemically bonded directly onto precision sealed bearing molded to tight concentricity specifications.
Elastomer Applications - Hose Hose configured for limited space in marine engine application.
Elastomer Applications - Tube Oil resistant molded tube used on combustion engine.