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Read our latest newsletter for exciting news about Albright Technologies.
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Silicone, especially liquid silicone will conform well to just about any mold shape that can be dreamed up, the difficulty is typically in the mold making process. In the prototyping sector, we see a lot of cutting edge design concepts that push the envelope with features that are very small and precise. Every molder has their own specialty and also their own limitations. At Albright we specialize in quick-turn micro medical device parts molded in liquid silicone rubber. One design limitation that we frequently contend with is the size and geometry of micro features, we like to use “The 3X Rule”, which basically means that if you have a microscopic opening in your part design (which would be reflective of a raised boss in the mold) the overall height of that feature shouldn’t exceed three times the diameter (or side length) of the feature. That would mean that if you wanted to form a 0.005″ diameter hole in your molded part, you wouldn’t want to go much more than 0.015″ deep into the part, from a tool making standpoint.
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How is the “softness” (durometer) of medical grade silicone measured?
This is a question that comes up almost every day when discussing new project ideas with perspective clients. The softness or durometer of all polymers/elastomers/rubbers is measured essentially the same way and the term while commonly used to describe the material hardness, actually originated from the device used to take the measurement a duro-meter. There are lots of different designs for this device, click here to compare pricing and options and get a general feel for what they look like and how they work.
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Last year we ran a contest asking for your silicone related questions and had a great response! We then had our engineers answer all of your questions and posted them here. In order to give the best service and information possible, we are again asking for industry professionals to submit their silicone questions.
Click here to find out more and submit a question!
*The winning name will be chosen on October 1, 2012.