Can conventional die castings be produced to 100% pressure tightness?
A. With special attention to controlling porosity in the design of the part, in die design, and in production processing, most die castings can be cast pressure tight, particularly if this requirement is not essential throughout the casting’s entire cross section. The die caster should always be informed of pressure tightness requirements before any die design takes place. Where a part design with heavy sections, for example, will not allow modification and 100% pressure tightness is required, impregnation techniques can be used with conventional die castings. Impregnation processing forces organic material into the surface pores of the casting, effectively sealing the parts. Pressure tightness is discussed in more detail in the NADCA Product Standards Manual (See description & Discount Order Form).
