It is reported that the pouring process of heat insulation technology originated in the United States, its main role is a mixture similar to sealing wax poured into the middle of aluminum doors and windows, to insulation.

　　At the same time, a patent for polyurethane appeared in Germany. In 1952, another patent was published, in which the inventor bonded or mechanically compressed an unformed polymer insulating material into a heat-breaking tank for aluminum profiles, as you can see today, the aluminum alloy profile groove bottom connection part of the removal, this method is today's“Casting process” technology prototype.

　　Up to now, there are many domestic manufacturers introduced casting equipment, including imported and domestic, most of these manufacturers have into the bar equipment at the same time the introduction of casting equipment.

　　Threading process is to connect two parts of aluminum profile inside and outside by two heat-insulating strips, so as to prevent the heat conduction between inside and outside of aluminum profile and realize the goal of energy saving.

　　According to incomplete statistics, there are nearly 100 domestic companies using imported and domestic production equipment, the normal production of less than half of the total.

　　The casting process and threading process both have good heat insulation performance and are the development direction of energy-saving aluminum alloy building materials. And will be introduced this year aluminum insulation building profiles of the national standard. Then the market for heat-insulating and energy-saving profiles will become clearer.