The material presented in this video are some highlights from NADCA’s online webinar - Die Casting Defects - Shrinkage Porosity. This course describes how to identify shrinkage porosity, discusses the causes, and provides corrective measures to minimize shrinkage porosity.
Shrink porosity can also be reduced by metal pressure. With the high pressure die casting process to use intensification in all of these processes whether it is the whole time in zinc or intensification in aluminum or magnesium. You are using those high pressure features to fill those voids. So, you fill the cold chamber, you go through pour-hole close, slow shot, fast shot. Then you go into intensification phase. You enter into the intensification phase prior to the gates becoming solid. We are filling those voids. Those voids start to develop when shrink occurs and then you are increasing the pressure of the metal until it goes past those thin areas and feeds that shrink.
NADCA Offers self paced education online through the online education system. Online education and training offers students the convenience of taking courses anywhere and the ability to complete courses at their own pace. In addition, companies and individuals can save money on travel expenses and reduce time away from the office. The online education system is populated by taking weekly recordings of our webinars and converting them into online classes.
Each course contains a video presentation, PDF of the slides shown, additional resources and when applicable, the option to test your knowledge on the course viewed.
Courses for the online education system can be purchased in a variety of ways and vary from purchasing one course to purchasing entire training blocks.
