We all know something about the coloring of industrial aluminum profiles in order to achieve more beautiful results. Do you know that aluminum profiles should be oxidized before coloring, and oxidation can also enhance the corrosion resistance of aluminum profiles? Then let's learn about the coloring knowledge and precautions of industrial aluminum profiles together.

1. Surface pretreatment: You can choose physical or chemical methods to clean the profile surface, or you can choose mechanical means to get a dull surface.

2. Anodizing: Under certain technological conditions, the surface of the profile after surface treatment is anodized, thus forming a dense and porous oxide film.

3. Hole sealing: The pores of the porous oxide film generated after anodic oxidation are sealed, so that the anti-pollution, anti-corrosion and wear resistance of the oxide film are enhanced. Because the oxide film is colorless and transparent, using the strong adsorption of the oxide film, some metal salts are deposited in the film holes, which can make the profile show other colors.

Lamination and poor welding are common problems in the production of industrial aluminum profiles.

There are always some problems in the production process of industrial aluminum profiles, such as welding and delamination. Basically, the probability of these two problems is relatively large. Let's talk about the causes and preventive methods of stratification and poor welding of industrial aluminum profiles.

The prevention method of delamination and poor welding is delamination, which is a kind of skin delamination defect formed by the surface of ingot flowing into the product along the interface between the die and the front elastic zone when the metal flows evenly. On the transverse low magnification specimen, there is a delamination defect at the edge of the section.

The main causes of stratification

1, there is dirt on the surface of the ingot or there is a large segregation aggregate on the ingot without turning the car, and metal tumors are easy to cause stratification;

2. The surface of the blank has burrs or dirt such as oil stain and sawdust, which is not cleaned before extrusion;

3. The location of the die hole is unreasonable and close to the edge of the extrusion cylinder;

4. If the extrusion tool is badly worn or there is dirt in the bushing of the extrusion cylinder, it will not be cleaned and will not be replaced in time.

5, extrusion pad diameter difference is too large;

6. The temperature of the extrusion cylinder is much higher than that of the ingot.

Prevention method

1, reasonable design of mold, timely inspection and replacement of unqualified tools;

2. Unqualified ingots are not loaded into the furnace;

3. After shearing the residual materials, they shall be cleaned up and shall not stick with lubricating oil;

4, keep the extrusion cylinder lining in good condition, or use gasket to clean the lining in time.

Poor welding The phenomenon that the hollow products extruded by the shunt die are layered or not completely welded at the weld is called poor welding.

The main causes of poor welding

1, the extrusion coefficient is small, the extrusion temperature is low, and the extrusion speed is fast;

2. The extruded wool or tools are not clean;

3. Oil the mold;

4. Improper mold design, insufficient or unbalanced hydrostatic pressure, and unreasonable design of shunt hole;

5. There is oil stain on the surface of the ingot.

Prevention method

1. Appropriately increase the extrusion coefficient, extrusion temperature and extrusion speed;

2. Reasonable design and manufacture of molds;

3. The extrusion cylinder and extrusion gasket are not oiled and kept clean;

4. Ingots with clean surface are adopted.

If one or several problems often occur during the extrusion of industrial aluminum profiles, we must find out the reasons and solve the problems fundamentally, so as to ensure that the quality of industrial aluminum profiles can keep up with the market demand.

Link-B2B is a professional supplier listing service platform which will provide high quality and trustworthy supplier list to international buyers. If you are looking for aluminum profiles suppliers, feel free to visit Link-B2B.com and send a request.