Company News

What are the reasons for the formation of "adsorbed particles"?

Update time : 2022-10-26 19:37:12

In the extrusion process of aluminum radiator profiles, common defects are bending, twisting, deformation, slag inclusions, etc. However, it is difficult to spot "adsorbed particles" defects without careful observation or contact. The harm is: in the production process of electrophoresis and spraying profiles, it is difficult to remove, which affects the appearance of the profiles and produces waste products. The main reasons for the formation of "adsorbed particles" are as follows:

1. The influence of casting quality

The quality of cast rods is an important factor affecting the surface and extrusion of aluminum radiator profiles. The formation of "adsorbed particles" is closely related to the quality of cast rods. Common structural defects of cast rods include slag inclusions, looseness, coarse grains, segregation, and brightness. All these cast rod defects have one thing in common, that is, poor welding of the cast rod matrix, resulting in discontinuous flow of the matrix, which is an important factor for the formation of "adsorbed particles".

2. The influence of mold

In extrusion production, the mold works under high temperature and high pressure, which will produce elastic deformation. The working belt of the die starts parallel to the extrusion direction. After being pressed, the working belt deforms into a trumpet shape, and only the cutting edge of the working belt contacts the sticky aluminum formed by the heat sink aluminum profile, which is similar to the blade knob of a turning tool. During the process of forming the bonded aluminium, the aluminium radiator profiles continuously take out the particles and adhere to the surface of the profile, resulting in "adsorbed particles".

3. The influence of extrusion process

Whether the extrusion process parameters are correct is also an important factor affecting the "adsorption of particles". The higher the extrusion temperature, the faster the extrusion speed and the more adsorbed particles. Due to the higher extrusion temperature and speed, the profile flow rate is faster, and the mold the greater the degree of deformation, the faster the metal flow, and the relative weakening of the metal's deformation resistance, which makes it easier to form the phenomenon of sticking to aluminum.

The influencing factors of "adsorbed particles" are mainly casting rods, molds and extrusion processes. The operation level of operators is also reflected in these three elements. On the basis of production practice, through continuous analysis of problems and experience summarization, it is possible to reduce or avoid "adsorbed particles", greatly improving the yield and production efficiency of aluminum radiator profiles.

Previous : What equipment is needed to produce industrial aluminum profiles?

Next : The important position and role of extrusion in the processing of aluminum profiles

What are the methods of identifying the quality of motor housing aluminum extrusions?

Mar .31.2023

With the widespread use of aluminum profiles, motor housing aluminum extrusions processing manufacturers are also increasing, but because of the uneven processing technology of various manufacturers, the quality of processed products also have concave and convex.

What are the polishing methods of motor housing aluminum extrusions?

Mar .30.2023

Motor housing aluminum extrusions are often inseparable from polishing if they want to achieve smooth or mirror effect. Its grinding refers to the use of mechanical, chemical or electrochemical action, reduce the roughness of the workpiece surface, make the surface bright and smooth processing method.

Spray curing treatment of motor housing aluminum extrusions

Mar .29.2023

Three spraying layer generally need two curing, motor housing aluminum extrusions into the hardening furnace treatment, hardening temperature is generally between 180℃-250℃, hardening time for 15-25 minutes, different fluorine coating manufacturers according to their own paint to provide the best temperature and time.

How to protect the appearance of motor housing aluminum extrusions?

Mar .28.2023

The appearance of motor housing aluminum extrusions is most easily damaged during the turnover of many processes.

Hammy Han