Bridge-cut-off aluminum-plastic co-extrusion section bar special for outside-aluminum inside-plastic doors and windows and production method thereof

Abstract

The invention provides a bridge-cut-off aluminum-plastic co-extrusion section bar special for outside-aluminum inside-plastic doors and windows and a production method thereof. The bridge-cut-off aluminum-plastic co-extrusion section bar comprises an aluminum section bar, an aluminum lining, a heat-insulation cut-off bridge and a composite plastic layer, wherein the outer side of the aluminum section bar faces the outside, and the inner side of the aluminum section bar is provided with an inwards-protruding reduced groove. The outer side of the aluminum lining is provided with a reduced groove corresponding to the reduced groove formed in the aluminum section bar, and the reduced groove of the aluminum lining and the reduced groove of the aluminum section bar are mutually connected through the heat-insulation cut-off bridge. The periphery of the aluminum lining and the outer side of the inwards-protruding portion of the aluminum section bar are provided with the composite plastic layer formed through co-extrusion. The composite plastic layer is formed by compounding an outer-side hard plastic layer and an inner-side micro-foaming plastic layer or is a surface-crusting micro-foaming plastic layer. The section bar is subjected to the two processes of compounding and co-extrusion forming, the four constituent parts are organically and closely connected together to form the outside-aluminum inside-plastic bridge-cut-off aluminum-plastic co-extrusion section bar. The bridge-cut-off aluminum-plastic co-extrusion section bar has the advantages of being resistant to light and weather and being heat-insulating, heat-preserving, good in wind pressure resistance and firm in composition.

Description

technical field [0001] The invention relates to a broken-bridge aluminum-plastic co-extrusion profile specially used for doors and windows with outer aluminum and inner plastic and a production method thereof. The profile is a broken bridge aluminum-plastic co-extrusion profile used on doors and windows, where the outdoor visible part is made of aluminum alloy and the indoor visible part is made of plastic. This profile is a new type of profile developed on the basis of the existing general-purpose broken bridge aluminum profile, aluminum-plastic co-extrusion profile and aluminum-plastic composite profile. The doors and windows made of this kind of profile, whether it is a flat opening type or a push-pull type, the outdoor aluminum alloy is resistant to ultraviolet light and does not age, and the indoor plastic is heat-insulating and heat-resistant, and the heat is not conducted. Tight, the overall combination of doors and windows is firm, with high-strength wind pressure res...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a broken bridge aluminum-plastic co-extrusion profile for doors and windows with outer aluminum and inner plastic and its production method to solve the existing problem of broken bridge aluminum profiles: after the broken bridge is connected, the indoor part is still metal aluminum, and the indoor part is still aluminum. The metal aluminum is exposed, not only need surface treatment, but also need to cooperate with aluminum bead to clamp the glass; the process of metal aluminum processing and surface treatment is complicated, the cost is high, and the heat insulation performance of exposed aluminum is poor;

[0006] Solve the problems existing in the existing aluminum-plastic co-extruded profiles: the plastic is fully covered with aluminum, and the outdoor plastic is easily aged by ultraviolet light, which affects the service life of doors and windows;

[0007] And solve the problems existing in the existing aluminum-plastic composite profiles: the strength of the entire profile is insufficient, the fastening quality of the hardware installation screws cannot be guaranteed, the plastic and aluminum parts are formed separately first, and then compounded, and the problems are easy to crack

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