Die casting(Aluminium Die Casting) is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies which have been machined into shape and work similarly to an injection mold during the process. Most die castings are made from non-ferrous metals, specifically zinc, copper, aluminium, magnesium, lead, pewter and tin based alloys. Depending on the type of metal being cast, a hot- or cold-chamber machine is used.
The casting equipment and the metal dies represent large capital costs and this tends to limit the process to high volume production. Manufacture of parts using die casting is relatively simple, involving only four main steps, which keeps the incremental cost per item low. It is especially suited for a large quantity of small to medium-sized castings, which is why die casting produces more castings than any other casting process.[1] Die castings are characterized by a very good surface finish (by casting standards) and dimensional consistency. Aluminum Die Casting, Die Casting Components, Pneumatic Zinc Die Casting, Zin Die Casting,Aluminium Die Casting NINGBO BRANDO HARDWARE CO.,LTD , https://www.brandopneumatic.com
Two variants are pore-free die casting, which is used to eliminate gas porosity defects; and direct injection die casting, which is used with zinc castings to reduce scrap and increase yield.
A few new icebreakers designed by Aker Arctic, which is being built by the Russian Vyborg Shipyard, will use the generator set provided by Wärtsilä as its main power. The two icebreakers under construction were built for Gazprom Neft, Russia's third-largest oil producer based in St. Petersburg. The power equipment contract was signed between Wärtsilä and the Ruselprom Group in October.
It is reported that the two newly constructed icebreakers will operate under Arctic conditions with outside temperatures as low as minus 50 ° C and ice thicknesses up to 2 m. Due to these challenging operational considerations, the reliability and overall efficiency of the Wärtsilä engine is a key consideration in signing the contract. The effective operation of the Wärtsilä engine under such low air intake conditions will provide the basis for an Arctic package solution.
Wärtsilä's equipment for each icebreaker includes two 16-cylinder and two 8-cylinder Wärtsilä 32 engines and one six-cylinder Wärtsilä 20 engine. The delivery period to the shipyard begins in the summer of 2016.
After the completion of construction in 2017, the two icebreakers will operate in Porto Novi, northern Russia.
August 20, 2019