User Password forgot or sign up now Not a member Sign up now or login help Home Explore Answers Community Submit search All Art Craft Food Games Green Home Kids Life Music Offbeat Outdoors Pets Photo Ride Science Tech Support DIY and Instructables Become a Pro Member Today Venturi Vacuum degassing Apparatus for use in Rapid Biomedical Part Prototyping intro step 1 step 2 step 3 step 4 step 5 step 6 step 7 step 8 FACEBOOK TWITTER EMAIL EMBED PRINT PDF intro Venturi Vacuum degassing Apparatus for use in Rapid Biomedical Part Prototyping Project Team Richard H Siderits MD Christoper Sereni MSIII Varun Singh Investigational Pathology Team Removing bubbles when you re making blanks to be used for machining plastic parts or casting models from Room Temperature Vulcanization RTV silicone rubber is an important step The bubbles leave behind void spaces that can spoil an otherwise flawless model or part A esc quot degassing apparatus esc quot or Vacuum esc quot Desgasser esc quot takes bubbles out of plastic resin or silicone rubber before it sets Commercial degassers can be expensive This project shows you how to make a small vacuum degassing apparatus for under 20 dollars The only thing that you need to use the apparatus is a standard air compressor To View All Steps on one page Go Pro Today step 1 Parts List 1 Plastic container for the vacuum chamber from the esc quot Dollar Store esc quot 1 dollar 2 Semi rigid plastic hose and air hose connectors from the local hardware store 4 dolla hellip step 2 Making the Vacuum Chamber esc quot Dollar Store Style esc quot The container that we ll use has to be sturdy enough so that it won t collapse when you pull a vacuum on it I learned that the hard way and it needs to be deep enough to hellip step 3 Attaching the Vacuum hose Drill a hole in the side of the container Make a hole in the side of the container Instead of using a drill you might consider heating the connector and melting your way through the plastic container You mig hellip step 4 Two part plastic resin material Im