Bonding Technology of Aluminum Honeycomb Panel

aluminum honeycomb panel是一种夹层结构的新型复合材料，由上下两层铝薄板通过胶粘剂与铝蜂窝芯复合而成。aluminum honeycomb panel的面板通常喷涂氟碳涂料或聚酯涂料，氟碳涂层由于具有很好的耐候性与自洁性而广泛用于室外，聚酯涂层则多用于室内。aluminum honeycomb panel可以制成质量较轻、强度高、刚性好、板面非常平整的板，可用于结构、垫层、隔断以及装饰等场合，例如可用于幕墙、建筑隔板、吸音板、高速列车、船舶、汽车车厢等。aluminum honeycomb panel的质量除与所选用的材质有关外，主要取决于粘接质量，其关键技术指标是剥离强度。

Aluminum honeycomb panel manufacturing generally has three kinds of process: 1, the use of room temperature curing polyurethane or epoxy glue, the use of hand paste or spray glue composite; 2, the use of epoxy film, the use of hot pressing composite; 3, the use of thermoplastic film, the use of flat continuous thermal composite. The three processes will be described below one by one.

1、room temperature curing process

The room temperature curing process usually uses two-component polyurethane adhesive or two-component epoxy structural adhesive. The mixed adhesive can be cured at a temperature higher than 10 ℃, and heating can accelerate the curing speed. First of all, the aluminum panel is made into a box shape, arc shape, and then spray glue or glue, and then the honeycomb core and aluminum panel in order to stack, apply a certain pressure, at room temperature after 1 weeks of curing, or in a hot press heating to not higher than 100 ℃, after a few hours to cure.

2、Epoxy adhesive film process

Epoxy adhesive film is epoxy modified resin and nylon mesh or non-woven composite film, the earliest used in the manufacture of aircraft honeycomb panels. After adjusting the formula and the use of different types of epoxy resin production of aluminum honeycomb panels are now used for civilian.

First of all, the aluminum panel (or pre-processed aluminum box), honeycomb core and adhesive film are stacked in sequence, then they are fed into a hot press and heated to about 150 ℃, and then they are taken out for cooling after more than ten minutes. In order to prevent the hot press from collapsing the honeycomb, it is best to put 4 equal high cushion blocks around the hot press. The epoxy adhesive film shall be stored in the freezer at low temperature, and the adhesive film shall be taken out of the freezer half a day or 1 day in advance. The aluminum honeycomb panel produced by epoxy adhesive film process can also be produced by autoclave, that is, the aluminum panel, honeycomb core and adhesive film are stacked in sequence, then placed on the forming mold, and vacuum hot-pressed composite. As long as the shape of the molding die is changed, various shaped plates can be produced.

3、Continuous composite process of thermoplastic film

The use of thermoplastic film, the use of hot press production of aluminum honeycomb plate bonding effect is poor, generally do not use this method of production, to the use of thermoplastic film continuous composite process production of aluminum honeycomb plate is appropriate.

First of all, the aluminum panel, honeycomb core and thermoplastic film are stacked in sequence, and then sent to the plane continuous thermal composite machine, under pressure and heating, after a few minutes of composite, followed by cooling under pressure, the production of aluminum honeycomb plate flatness is very high. The thermoplastic film is easy to use and does not affect its performance when stored at room temperature for one or two years.