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Structural characteristics of aluminum composite panel

 Aluminum composite panel by the inside and outside of the two layers are 0.5mm thick aluminum plate sandwiched between 2-5mm thick aluminum plate surface has a very thin roll coating of fluorocarbon spray covering paint. This composite board is characterized by uniform color, flat surface, easy to make, but the shortcomings of this composite board is that in the middle of the composite board sandwich contains toxic ingredients, in the burning or up to high temperature gas, with internal and external walls are polluting the environment, while the aluminum and PVC sandwich is used to glue pressure, its composite strength is not high, between the two layers can be pulled by force to separate the aluminum plate and sandwich. In addition, this composite plate because the aluminum plate is very thin in the local heat, the middle sandwich layer is easy to produce expansion so that the aluminum plate outward bulge.


From the curtain wall lightning protection point of view, because the aluminum composite plate is two layers of 0.5mm thick aluminum sheet and polyethylene pressurized bonding and become. Polyethylene is a bad conductor, two layers of aluminum thin plate in an insulated state, although the inner layer of aluminum composite plate production plus aluminum alloy subframe, rivets and aluminum composite plate on the curved four sides of the fixed connected; because the riveted surface is too small, more importantly, 0.5mm aluminum thin plate is too thin, in the event of lightning, large lightning flow in the building lateral development around the curtain wall plate will penetrate 0.5mm aluminum thin plate, strong current is difficult to make through the composite plate grounding The building was struck by lightning.


From the production and installation of aluminum composite panel: the production of aluminum composite panel is first slotted on all sides of the composite panel, cut off a certain width and one side of the aluminum and plastic layer leaving only 0.5mm thick outer aluminum plate, bend 90° angle into a rectangle on all sides, then make a rectangular subframe of the same size with aluminum profile material and put it in the rectangular slot of the aluminum composite panel, the bottom side of the subframe is glued with the back of the aluminum composite panel, the four sides of the composite panel bent up are fixed with rivets on all sides of the subframe, and the rectangle is then glued with one to several aluminum profile reinforcement bars in the middle. In the middle, one to several aluminum reinforcement bars are glued with structural adhesive.


  Most of the current installation and production units are not made according to the above practice, but in the aluminum panel after grooving the upper edge bent into 90 ° angle, only in the four folded edges of the composite plate plus angle aluminum fixed. So that the plate surface self-weight and any external force by any load are four side 0.5mm aluminum plate to bear, security small. Any curtain wall at any time are subject to different positive and negative wind load pressure, plate surface four sides 0.5mm is easy to fracture, the phenomenon has been in most projects, so aluminum composite panel curtain wall production must be added aluminum alloy subframe and reinforcing bars.


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