Comparison Of Aluminum Veneer

Metal curtain wall applications have a history of several decades, and the three types of materials still in use include aluminum veneer, aluminum-plastic composite panel and aluminum honeycomb panel. Among these three materials, aluminum veneer and aluminum-plastic panel are the most commonly used. Aluminum veneer appeared first, and then in the late 1960s and early 1970s, aluminum-plastic composite panel was invented in Germany and quickly became popular around the world. What is the difference between aluminum-plastic panel and aluminum veneer? Here I will make a simple comparison of these two materials:
Material and cost
Aluminum veneer generally uses 2-4mm thick AA1100 pure aluminum plate or AA3003 and other high-quality aluminum alloy plates. Domestically, 2.5mm thick AA3003 aluminum alloy plates are generally used; aluminum-plastic composite panels generally use a 3-4mm three-layer structure, including two 0.5mm upper and lower layers sandwiching PVC or PE. We can see from the materials that the cost of aluminum-plastic composite panels is definitely much lower than that of aluminum veneer. The market price of 4mm thick composite panels is about 120 yuan/square meter lower than that of 2.5mm thick aluminum veneers. For a 10,000 square meter project, the cost of using aluminum-plastic panels will be reduced by 1.2 million yuan compared to using aluminum veneers.
Processing process
There are two types of aluminum veneers in the world: fluorocarbon sprayed aluminum veneers and roller coating. There is no roller coating production line in China for the time being, so the processing process of veneers here mainly refers to fluorocarbon spraying production. Spraying production of aluminum veneers is divided into two major steps: the first step is sheet metal processing. This process mainly processes the aluminum veneer into the shape and size required for construction through cutting, folding, bending, welding, grinding and other processes. The second step is spraying. Spraying is to spray paint on the processed sheet metal. There are two types of spraying, one is manual spraying and the other is machine spraying. Machine spraying is generally only suitable for regular flat plates, but this type of aluminum veneer is rarely used in actual use. Most domestic manufacturers use manual spraying. Manual spraying is a dangerous job, because the volatility and toxicity of the paint are relatively strong, which can easily cause chronic benzene poisoning and seriously affect human health. One of the major advantages of manual spraying is that no matter how large or small the amount is, the color can be selected, while the roller coating of aluminum-plastic panels must reach a certain amount before processing. The processing process of aluminum-plastic panels is more complicated than that of aluminum veneers. It mainly has four major processes: chemical formation, coating, compounding and trimming. Except for trimming, the other four processes are all automated production. From its processing process, it can be seen that aluminum-plastic panels have certain advantages in environmental protection and safety. In addition, due to the simplicity of the sheet metal processing process of aluminum veneers, some private workshops have also begun to get involved, which has seriously affected the stability of the market quality of aluminum veneers.
Product
Project 2.5mm aluminum veneer 4mm thick aluminum-plastic composite panel
Appearance quality The flatness of the flat plate is not high, and it looks like there are local bumps. The flatness of the flat plate is relatively high, but the processing shape is limited;
But it can be processed into various irregular shapes; Spraying Roller coating quality is good visually, color difference and film thickness deviation
Due to the instability of artificial technology, there is a local color difference that is not obvious, but the damage cannot be repaired locally.
And film thickness deviation; local damage can be repaired.
Machine tensile strength 130/mm 38-61N/mm2X
Mechanical elongation 5%-10% 12%-17%
Bending strength 84.2N/mm 34N/mm2
Energy elastic modulus 70.00N/mm2 26.136-49.050N/mm2
As can be seen from the above table, the appearance of the aluminum veneer is worse than that of the aluminum-plastic panel, but its mechanical properties are significantly better than those of the aluminum-plastic panel, and its wind pressure resistance is also better than that of the aluminum-plastic panel. However, in most parts of my country, the wind pressure value can be fully borne by aluminum-plastic panels, so it is a bit of a waste to use aluminum veneers in projects.
Construction process
The construction process of aluminum-plastic panels and aluminum veneers is generally the same. The biggest difference is that aluminum-plastic panels are processed into the required shape and specifications on site, which has a greater degree of construction freedom. Aluminum veneers are processed and formed by medium-sized manufacturers. Due to the precision of domestic equipment, they often encounter some small troubles during the construction process. In addition, in terms of guaranteeing the delivery period during the construction process, the batch production of aluminum-plastic composite panels is much faster than that of aluminum veneers, and the construction schedule guarantee system is also higher.
Processing requirements
As a senior manufacturer, it is necessary to integrate scientific research, design, and production. Senior manufacturers must first have an independent system, be able to quickly complete the basic design of the product, have the corresponding scientific research capabilities, be able to improve product shortcomings and develop new products, solve problems encountered in reality, and then meet the production capacity requirements.
Sheet metal processing requirements: A complete set of shearing, punching, bending and rolling machines for processing curved plates can realize sheet metal processing of various complex shapes with a basic size of 4 meters (many manufacturers can achieve processing of more than 6 meters, but the longer the length, the worse the flatness). Aluminum argon arc welding and high-frequency welding nail equipment can ensure the high-quality completion of the welding, corner sealing and reinforcement nailing processes of the formed aluminum plate; mechanized grinding and polishing equipment and a 6.6×1.7×1 meter automated pre-treatment tank and a set of 8×3 meters and 8×2 meters of spray rooms and ovens designed and manufactured exclusively can complete the processing of super-large plates and long-shaped materials, and ensure that the product surface meets the film layer requirements of the substrate required for coating.
Spraying processing requirements: Chemical pre-treatment uses chemical solutions to remove organic and inorganic stains on the metal surface. Then remove the natural oxide layer, and then use chemicals to produce an oxide film to make the metal surface rust-proof and permanent paint adhesion. Electrostatic painting uses the domestic advanced automatic electrostatic spraying line to spray the fluorocarbon coating layer by layer on the metal base surface according to the process requirements, and bake and cure at a specific temperature and time.
Quality assurance system requirements: Quality inspection and packaging use high-precision special testing instruments to strictly inspect product quality, ensure that product dimensional accuracy meets corporate standards, and the paint film quality meets the US AAMA-605 standard.