The metal casting of the internal shape is made from metal, usually a lead alloy of about 40% lead with other elements added, which vary depending on the company and the item being made.
Once cast, this core is loaded into a press and a plastic formation made around it. The plastic cast, complete with its inner core is then submerged in a liquid which dissolves only the metal, such as lutron. Once the core has been removed the plastic moulding is passed through a wash ready for handling by operators who perform any other required tasks to complete the manufacturing.
Coming down the line: five emerging technologies for automotive. (liquid composite molding, thermoplastic composites, large-part blow molding, gas injection molding, lost-core molding)
Sep 01, 1991; Coming Down the Line: Five Emerging Technologies For Automotive Commercialization of promising "cutting-edge" technologies for...
Publication No. WO/2010/042585 Published on April 15, Assigned to E. I. du Pont de Nemours & Co. for Hollow Article Production, Polymeric Muffler Housing Lost Core Process (French, Czech Inventors)
Apr 19, 2010; GENEVA, April 21 -- Guillaume Doy and Philippe Leboeuf, both of France, and Miroslav Palicka, Czech Republic, have developed a...