Aluminium-plastic composite section bar with inflation structure and its producing method

Abstract

The new type of composite aluminum-plastic section bar with inflation structure has aluminum alloy section bar with at least one notch distributed lengthwise distributed, and plastic section bar with raised part in the number and shape corresponding to the notch in the aluminum alloy section bar and several inflatable closed cavities, and is made through connection and pressing. It is used in door and window, and has its aluminum alloy section bar as outer bearing member, and inflated plastic section bar as inner heat insulating and inside decoration member. Outside and inside the closed cavities of plastic section bar, there may be paint or coated reflecting layer. The reasonable combination of aluminum alloy, plastic and air makes the new type of composite section bar high in strength, good in texture, ageing resistant, less deformation, heat insulating, sound isolating and suitable for use in building door and window.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an aluminum-plastic composite profile used for building doors and windows. Background technique [0002] Existing building door, window and window frame materials use timber, steel, aluminum alloys, plastics, and fiberglass. However, wood and steel are materials that are not promoted by the state because they do not conform to the current national industrial policy. FRP is rarely used due to poor technical performance and texture. Aluminum alloy and plastic steel are mostly used now. Both profiles have their pros and cons. Aluminum alloy profiles have high strength, good performance, good texture, and simple processing, but they have a large thermal conductivity, fast heat transfer (cold), and are easy to conduct electricity. It is prone to condensation in winter. In terms of building materials, it is a non-energy-saving material. Although the broken bridge heat-insulating...

AI Technical Summary

Problems solved by technology

The patent documents disclosed above can solve the problems of large thermal conductivity and fast heat transfer (cold) of the existing aluminum alloy profiles, and have better performance, higher air tightness and water tightness, and are therefore welcomed by the market. But there are also some deficiencies, such as unreasonable production process, prone to plastic and aluminum cracks in the process of aluminum-plastic lamination, which greatly reduces the performance of aluminum-plastic windows, and there are complex production equipment and manufacturing costs. advanced defects

Some put the interface between the aluminum alloy profile and the plastic profile at the glass groove. Because the linear expansion coefficient and strength of the two materials are very different, the aluminum alloy and the plastic will have different deformations under the action of temperature changes and long-term loads. The safety hazard of glass falling off due to separation

In addition, due to structural reasons, the energy-saving effect of these plastic profiles is not very ideal.

Images