Common connection methods for aluminum composite panels

Aluminum composite panels can be connected using commonly used connection methods for metal and plastic processing. Below are some commonly used connection methods.

(1) Rivet connection:

Aluminum composite panels can be connected between panels or between panels and other materials using rivets suitable for aluminum materials. For outdoor or high humidity areas, stainless steel core pop rivets should be used to prevent corrosion from affecting the surface of aluminum composite panels. If rivets with iron cores are used, the iron core must be pulled out after riveting. Countersunk rivets can only be used for indoor applications.

(2) Screw fasteners:

There are two types of usage: outdoor and indoor:

A. Fixed devices for outdoor use:

When using threaded fasteners outdoors, the thermal expansion coefficient of aluminum composite panels needs to be considered. In order to prevent extrusion deformation of aluminum composite panels due to thermal deformation, the openings on the aluminum composite panels need to be larger than the screw diameter to meet the requirements of expansion and contraction.

Using stainless steel threads combined with sealing washers can prevent the aluminum-plastic plate from being squeezed and deformed. The functionality of this product has been validated. To select screws suitable for structural materials, use a torque wrench or screwdriver to tighten the screws, so that the gasket effectively seals the opening without leaving marks on the surface of the aluminum plate due to being too tight.

Sometimes it is necessary to use a deformed drill bit sleeve to drill holes on aluminum plates or bottom structures to achieve the construction of drilling rivets in a centered position.

One thing to note is that before tightening the screws, be sure to remove the protective film

B. Indoor Fixtures:

The connection of indoor applications can be made using steel plates or wooden board fixing screws with different head shapes. These screws usually do not allow thermal expansion displacement of aluminum composite panels.

Countersunk screws can be used to secure aluminum composite panels. You can use the usual sinking method or directly press the aluminum panel into the board. When performing this operation, the holes on the aluminum plate must be larger than the diameter of the screw.

(3) Plastic welding (only applicable to PE core materials)

The use of hot air for welding between plastics can be applied to the connection between aluminum composite panels. Using an electric heating welding gun, use heating air to melt the aluminum plate and polyethylene core layer, and then connect them to polyethylene plastic welding rods after cooling. The following are the conditions for obtaining good welding quality:

a. Carefully prepared board edge interfaces; b. Clean hot air; c. Correct welding temperature; d. Correct contact pressure; e. Welding speed.

(4) Adhesive:

Metal adhesive/universal adhesive is used for bonding. Used for indoor billboard and booth layout. Commonly used metals or ordinary adhesives are suitable for bonding to composite boards. Double sided tape is suitable for connections with low strength requirements. For situations that require high-strength bonding, we recommend using a single component adhesive JIBOND.

It should be noted that when used outdoors, the adhesive has a moderate ability to withstand static strength.

When bonding aluminum composite panels with other materials, bonding failure may occur due to differences in the thermal expansion coefficients of the materials.

(5) Card connector connection:

Combination clamps can also be used to fix and connect aluminum composite panels. The fixture can be made of aluminum or plastic materials, usually consisting of two parts and connected by screws.