English
English
In the field of aluminum profile production, aluminum extrusion molds are the core tools, and their performance directly affects production efficiency and product quality. However, the frequent occurrence of aluminum adhesion problems in aluminum extrusion molds has seriously troubled many enterprises and hindered the efficient development of the industry.
During the extrusion process of aluminum, due to its strong penetration ability, the aluminum material is easily penetrated into the small cracks of the mold when it is squeezed under force and slides inside the mold cavity, resulting in aluminum sticking to the mold. Once the mold shows aluminum adhesion, the adhered aluminum material may scratch the product during the subsequent extrusion process, affecting the surface quality and dimensional accuracy of the product, and even causing product scrap. Not only that, with the aggravation of aluminum adhesion, it may also lead to mold blockage, forcing the extrusion process to be interrupted, seriously affecting production progress and increasing production costs.
Traditional commonly used mold steels, such as DC53, although perform well in terms of hardness and wear resistance, there is a phenomenon of carbide segregation in their microstructure. This segregation will form a large number of subtle cracks that are difficult to detect by the naked eye. When used in aluminum extrusion molds, aluminum will penetrate through these subtle cracks, causing serious adhesive problems and potentially scratching the mold surface, greatly shortening the mold's service life.
Faced with the increasingly severe problem of aluminum adhesion, the research and application of new materials have become the key to solving it. For example, 8503 mold steel, as a new type of electroslag steel, has a uniform microstructure and high density, eliminating micro cracks that cause sticking from the source and achieving significant anti adhesion effects. In practical applications, some enterprises have effectively improved the problem of aluminum adhesion in molds by replacing DC53 mold steel with 8503 mold steel, significantly improving product quality and production efficiency. LG mold steel also performs well, with toughness 8-9 times that of DC53, good ductility, and elimination of fine crack sources that cause adhesive wear. Its hardness reaches HRC54-56, with sufficient strength and can be mirror polished to 10000-12000 grit. While ensuring non aluminum adhesion, it can also improve the smoothness of the product.
In addition to new materials, coating technology also provides new ideas for solving the problem of aluminum adhesion. By spraying a special coating on the surface of the mold, it can increase the lubrication between the mold and the aluminum material, reduce friction, effectively avoid mold blockage, and prevent the occurrence of bonding and aluminum adhesion. For example, JONYE high-temperature lubricant has a high temperature resistance of up to 1500 ° C, outstanding lubrication performance, is water-based, non-toxic, highly environmentally friendly, and has excellent film-forming adhesion. It does not react with molten metal and can maintain special effects such as high lubrication, release, high pressure resistance, oxidation resistance, high insulation, and anti sticking at high temperatures. Spraying this product can not only prevent the mold from sticking to aluminum, but also reduce the generation of mechanical lines, improve the smoothness of the product, and extend the service life of the mold.
The solution to the problem of aluminum adhesion in aluminum extrusion molds cannot be achieved without the synergistic effect of new materials and coating technology. With the continuous development and innovation of related technologies, it is believed that the performance of aluminum extrusion molds will be further improved in the future, injecting new vitality into the high-quality development of the aluminum profile production industry. Enterprises should closely monitor industry technological trends, actively introduce and apply new technologies and materials to enhance their competitiveness and occupy a favorable position in the market.
