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After the aluminum rod is heated, the extrusion process is immediately followed. During the aluminum extrusion process, it is easy to see defects (such as bending, deformation, short strips and scribing) and invisible defects (such as Adsorbed particles), if you do not pay attention to observe and summarize the causes of defects during the production process, and solve the problems in time, the appearance of the aluminum profile products produced is not good, and it is not easy to say that if you are not careful, it will easily cause scrap and bring unnecessary losses to the enterprise. .

Let's first take a look at the most prone problems when aluminum profile extrusion, such as short strips, bending, and scribing defects. The reasons are as follows:

First: The size between the aluminum extrusion cylinder and the aluminum extrusion pad is not matched, and the poor die hole causes the aluminum metal particles to be pressed in to form a short strip. Therefore, when choosing a mold, you must choose the appropriate size of the die pad and support pad. If the size is not suitable, it can be installed appropriately.

Second: The aluminum extrusion die is not replaced in time, the use time is too long, the hardness is not enough, and the extruded profile is elastic and easy to bend.

Third: Affected by extrusion speed and extrusion temperature, if the extrusion speed is too fast and the extrusion temperature is too high, the flow speed of the profile will also increase, the degree of mold deformation will increase, the metal flow speed will increase, and the deformation resistance will be reduced. Relatively weakened, it is easy to cause aluminum sticking, increase the roughness of the surface of the tool and die, and form a line on the surface of the profile, which affects the appearance.

These defects all have some common characteristics: the surface of the aluminum profile is white, distributed longitudinally and with a certain concentration, intermittently or dottedly, the tail is more than the front, and the most important thing is that the color is gray and black after oxidation, which seriously affects Beauty and quality.

How to solve the defects that affect the quality of aluminum profiles?

1. In the selection of aluminum extrusion die during the production of aluminum profiles, it must be strictly specified that the size error of the fit between the extrusion cylinder and the extrusion pad should not exceed 0.1mm;
2. The error of the extruded barrel and the working part and the non-working part, that is, the chamfer of the inlet of the extrusion barrel, does not exceed 1mm；
3. Ensure the hardness of the aluminum extrusion die and the smooth working belt without teeth, and ensure that the quality of the aluminum rod is qualified. Only by adopting the correct aluminum extrusion process can the produced aluminum profile products be beautiful and good quality.Hope the information shared above can be helpful to you.