Progressive Methods Of Casting In The Present Conditions

Forming foundry market determines the appearance of a number of requirements to produce quality castings and castings, primarily the competitiveness and profitability of production of castings. Particular attention is paid commodity type of product, cost and timeliness of delivery. This is due to the objective processes of disintegration of large enterprises to small and medium-sized independent foundries that are interested in profitable sales. Recovery of obsolete processes, equipment and communications requires considerable expenses, but can not provide the current level of production. Therefore, great interest is the contemporary processes of casting in the form of cold-mixes (HTS), in form, manufactured by a vacuum film forming (APF), Investment Casting (LPM) and casting on gasified models (LGM). Except for the LPM, the technological process does not require highly skilled workers who can produce castings presentation at relatively low cost to the organization and production. They have a certain flexibility and mobility, which is very important and seriality mnogonomenklaturnosti foundry products. Table 1 Indicators of different types of casting in the manufacture of precision castings are compared with process indicators in the form of dry sand (FS), adopted as a unit.

To produce the most attractive processes of casting and LGM APF, the first – when casting a split, and the second – one-piece form. They allow obtain the surface quality of castings at the LPM, and the process of LGM provides high accuracy and stable casts mnogonomenklaturnost and mass production. Cost of casting practically reduced to 1.5 – 2 times. Some of the advantages of these processes – in the absence of a binder and re-use sand mixture (sand). Let us dwell on the process of LGM to cook the most promising process for the manufacture of precision castings. To date this process has been transformed with many special sub-casting and became one of the most attractive, especially for a unit, serial and mass production.