We are proud to announce that Molded Dimensions Inc. is the first company in the world to achieve the Polyurethane Manufacturer’s Association’s Safe and Compliant Seal. Continue reading
When subjected to load, all elastomers exhibit an increasing deformation with time, know as creep. This occurs at any stress level and takes place in compression, tension and shear loadings and varies for each type of loading. In service, creep can be minimized by using low working stresses and avoiding high temperatures. No rapid method has been developed for its measurement because there is no know way of accelerating time effects without introducing inaccuracies in predicting rate of creep. Continue reading
There are many factors involved in the manufacturing of molded rubber products which affect tolerances. In general, the degree of reproducibility of dimensions depends upon the type of tooling and rubber used, and the state of the art. The purpose of this blog post is to list a few major factors affecting tolerances. Continue reading
We take pride in designing the best possible polyurethanes the industry has to offer, and that is due to the strict guidelines and standards we set for our self.
Sharp edges or corners, externally or within the polyurethane part, should be avoided, particularly where the polyurethane is stressed.
Rubber injection molds are designed for an efficient, cost effective molding process, including lowest possible cycle time, maximized cavity count, and minimal material waste. A small amount of material waste can be in the form of edge waste, or flash as we call it in the industry. This is the unwanted, fine, feathery rubber extension caused by raw material leaking into the mold parting line during the molding and curing process. Flashless molding is the most ideal choice to eliminate flash altogether. When flashless molding cannot be achieved, there are a variety of secondary operations available to address the flash. Continue reading
Written By: Tony Lukas, Chemist Molded Dimensions Inc
Polyurethane suppliers and processors are continually looking to develop new materials and applications to take advantage of the unique properties of urethane. One advantage that urethane has over rubber is much higher abrasion resistance. This has historically been particularly true as the hardness reaches Shore 80A and above. Although materials of softer hardness have long been available, the physical properties and abrasion resistance has not been a good as rubber in the 50A-70A range. New developments are allowing for both polyether and polyester based materials that are great improvements over currently available urethanes and even better than natural rubber and SBR. Typical applications for these types of materials would be in systems with heavy flow of particulate containing liquids or slurries. Continue reading
At Molded Dimensions, Inc., every decision made, every capital purchase, and every long-term strategy implemented is done with one goal in mind: to make MDI “a place where great people choose to work.” At the foundation of our company are great people who make quality product, delivered on time. This, in turn, draws great customers to our business. Great customers provide for stable, profitable business growth benefitting our employee owners. Continue reading
There are two types of abrasion – sliding and impingement. Sliding is the passing of an adjacent surface across the rubber surface. Impingement is wearing of the rubber exemplified by sand particles hitting the surface. Most wear in actual service occurs as a combination of both sliding and impingement.
When sliding, localized friction forces can impose high energy levels on the rubber. Abrasion and wear takes place when the rubber cannot withstand these forces.
GlocalSource is our unique service of providing rubber product from manufacturers around the globe, supported by Molded Dimensions, Inc.’s local, technical service and support. Companies benefit from our engineering knowledge, expertise, and program management, including design, logistics and communication. Continue reading