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The paper presents the results of investigations concerning the influence of negative (relative) pressure in the die cavity of high pressure die casting machine on the porosity of castings made of AlSi9Cu3 alloy. Examinations were carried out for the VertaCast cold chamber vertical pressure die casting machine equipped
THE NOFITH AMERICAN DIE CASTING ASSOCIATION is. The Time Is Now for Vacuum-Assisted Die Casting. Just now, immediately following the global economic meltdown, we are entering a period of unprecedented and virtually unlimited opportunity for the aluminum die casting industry. Automakers throughout the
porosity and gas defect, so that pressure resistance is excellent and casting bur is rarely occurred. As mold thermal load decreases, mold life thus extends. Low speed mold filling can reduce gas defect that casting can conduct welding or heat treatment. High Speed Mold. Filling. High Vacuum Die. Casting Process.
Abstract. The influences of process parameters and vacuum level in vacuum die casting technology on the density and mechanical properties of ADC12 alloy die castings were studied. Standard die casting tensile testing specimens were produced on a 650t cold chamber die casting machine with different vacuum
Abstract: The effects of vacuum assistance on the microstructure and mechanical properties of high-pressure die cast AZ91D alloy at different slow shot speeds were evaluated. Plate-shaped castings of AZ91D alloy were carried out on a TOYO BD?350V5 cold chamber die casting machine incorporated with a self-improved
4 Feb 2015 Abstract: Using vacuum die casting, 0.8 mm-thick plates in complicated shapes are manufactured with the highly castable aluminum alloy Silafont-36 (AlSi9MgMn). The sizes and shapes of the cavities, made of thin plates, feature four different mazes. To investigate formability and mechanical properties by
also requires a casting process optimally designed to suit the desired component characteristics. In addition to the four standard die casting processes (aluminum, magnesium, and vacuum die casting plus squeeze casting), Buhler Druckguss AG has also developed four other optimized die casting processes to further raise
Start-Up of Vacuum System. A. Power up vacuum unit, pull start switch, push jog mode, vac test and purge test valve. B. Make first few castings with die cast machine and discard. C. Check set-points through DTAM interface. . D. Push run mode, machine will be on auto cycle from die cast machine siinal. E. Castings will now
Abstract: The vacuum die-casting process, started 25 years ago in Japan, has been widely applied. This technology contributes very much to improvement of castings quality. The main factor causing the defects of die castings is the trapped air in the mold cavity, while the key technology of vacuum die-casting process is to
The present study is undertaken to calculate the rate of change of pressure and residual air mass in die casting for vacuum venting under choked ow conditions. In these calculations, the in uence of friction factor, due to roughness and vent air velocity change through the Mach number, has been taken into account.

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February 2018