Ceramic-Lined Barrels Live Longer When Processing Corrosive Compounds
A ceramic-lined barrel is said to extend barrel life in applications where nylon 6/6, PVC and other corrosive compounds are used. A field test conducted over a three-year period in an application running nylon 6/6 revealed 'virtually no barrel wear after 12 million cycles of injection molding.'
The company adds that in some cases, the ceramic-lined barrel can increase life by 10 times or more.
The barrel, which can be produced from D2 or other alloys, is treated with a composite ceramic material that is thermochemically bonded to the interior surface of the barrel. Producing a ceramic thickness of 0.002 to 0.003 in., an interphase between the ceramic material and the metal surface creates a bond that results in a substrate with a bond strength in excess of 10,000 psi. The surface leaves no porosity for chemical corrosion to occur.
In tests, the barrel exhibited 'extreme wear and chemical resistance, low friction and a hardness range of 1000 to 1850, Vickers.' For pricing information, contact the company directly. Use the Key Contact Directory on p 64.