Auto parts seal plate manufacturer

Why do auto parts use stretching instead of die casting?
Die castings are generally more complex parts. The surface of die castings includes: stripes, cold water lines, scratches, depressions, air bubbles, pores, shrinkage cavities, patterns, cracks, undercasting, imprints, mesh burrs, flash defects, etc.(turbo heat/ spare patrs)
The surface of the stretched part does not have the defects of the die-casting part. The shape of the stretched part should be simple and symmetrical, the mouth should be allowed to rebound slightly, and the side wall should be allowed to have a process slope. The wall thickness of the cylinder wall part generally has the phenomenon that the upper part is thicker and the lower part is thinner.( grimmspeed heat shield/ turbo heat shield/ turbo thrust plate)
Die-casting is a kind of pressure-casting part. It uses a pressure-casting mechanical die-casting machine equipped with a casting mold to pour liquid copper, zinc, aluminum or aluminum alloy into the feed port of the die-casting machine, and passes through the die-casting machine. Die casting, casting copper, zinc, aluminum parts or aluminum alloy parts of the shape and size limited by the mold, such parts are usually called die castings. Die-casting parts have different names in different places, such as die-casting parts, pressure castings, die-casting parts, die-casting aluminum, die-casting zinc parts, die-casting copper parts, copper die-casting parts, zinc die-casting parts, aluminum die-casting parts aluminum die-casting parts, aluminum die-casting parts Alloy castings, aluminum alloy die-casting parts, etc.( turbocharger gasket/)