What Is Manufacturing Process of Coated Aluminum Strip Roll
The roll coating process is an effective method of applying organic protective coatings on the aluminum strip roll. It is a continuous, highly automated process that produces a consistent product compared to post-coating methods.
Raw material input
The raw aluminum coil is sent to the production line, and is smoothed by the smoothing machine. This step ensures the smoothness of the product. The aluminum coil enters the stocker. There are two scrolls here, to ensure that one of them is always in a standby state.
Cleaning and pretreatment
The pretreatment of the aluminum coil is repeated by water spraying. This method is more effective than the traditional method. The water can also be reused, reducing energy consumption.
Pretreatment can improve the corrosion resistance of the product and improve the adhesion of the coating. At this stage, the conversion coating is chemically formed on the aluminum surface.
The coating process is mainly divided into two stages, namely base coating and top coating. In the first stage, the aluminum coil is passed through a roll coater and is primed on one or both sides. After drying, the aluminum coil passes through a second roller coater, at which time one or both sides of the aluminum coil are coated with topcoat.
A typical coating system requires the product to have formability, scratch resistance, attractive appearance, good weather resistance, paintability, etc. To achieve these different effect properties, coatings include: acrylic resin primers, polyester, polyurethane or fluorocarbon.
The color coated aluminum strip passes through the curing oven, and the temperature is set at a temperature adjusted to ensure that the volatiles on the aluminum strip are removed and the coating is cured. According to the needs of the coating system, the curing temperature is set between 200 and 300 degrees Celsius, which is the key technical point to ensure the quality of our products.
In addition, in order to protect the environment and control costs, the mist of the solvent is evaporated at high temperature to heat the curing oven.
Coated aluminum coils can be further processed into aluminum strip roll or embossed aluminum coil.
Protective film lamination
The protective film of the product is customized according to customer needs. These protective films have no impact on the environment and are easy to recycle. Welcome to leave message below to inquire aluminum strip price.
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