Modern Technology Metal Castings

The modern technology of production of metal castings for models Vladimir Doroshenko Physical and Technological Institute of Metals and Alloys of NASU, Kiev Over 75% of metal castings obtained using sand molds that when casting the metal in them emit gases, mostly consisting of products of combustion and evaporation of foundry sand binders. Entrepreneurs do…

Technological Institute

In addition, the use of styrofoam waste has important ecological value, since we are talking about reducing the waste in the human ecosphere. Most technological foundry sand compositions of mixtures on a 40-percent solution containing 2% polystyrene in the bottom line. These blends perfectly molded and cured by drying at a short-term temperatures up to…

Concrete Production

Gone are the days when the concrete mix with a shovel. In today's world can not do without the use of high technology, even in this simple at first glance, actually. In today's market there are a number of manufacturers offering fully automated batching plants. Such a plant can automate the entire process of preparation…

Calculations

The following methods have been tried to maintain the mercury vapor pressure at optimal level by artificially creating cold zones: Application of heat shields on the ends of the lamp to create cold zones of the electrodes. To this end, the back electrode at some distance from them, are placed screens, such as nickel-tin, well…

Main Installation Phase

The main stages of installation of an autonomous wastewater company 'service-Eco' for more than three years of implementation and installation of aeration of deep biological treatment plants 'TOPAS'. Over time, our experts have accumulated experience, which is now used in the creation of new developments in the field of wastewater treatment by the local sewage…

Sources Of Light. Artificial Light Sources

Artificial light source, or, more precisely, artificial sources of optical radiation, is called a device designed to convert any kind of energy into electromagnetic radiation lying in the optical range. The latter is known to be divided into three regions: UV with wavelengths between 1 and 380 nm, visible wavelengths from 380 to 770 nm…

Red Edition

Garmin Ltd. has decided to turn his gaze toward the beautiful half of humanity and made two special versions of their GPS-navigators: nuvi 250 light rose, and the nuvi 760 black diamond. New items that differ from the basic models of buildings decorated with colorful crystals, for sure will please many women drivers. Those who…

Construction

Cells on their effect on the hardiness are divided into three types: back (200 mm) safe (less than 0 1 mm); hazardous (200 to 0, 1 micron). In practice, found that if the ratio of pores with a diameter greater than 200 microns in pore volume with diameters ranging from 200 to more than 0.1…