Reasons For Damage To Aluminum Heat Sink

Aluminum heat sink is widely used for its many advantages, such as good plasticity, moderate heat treatment strength, good welding performance, and gorgeous color on the surface after anodizing. However, some problems often occur in the production process, resulting in low quality of heat sink aluminum profiles, reduced yields, increased production costs, and reduced benefits, resulting in a decline in the company's market competitiveness. Therefore, solving the defects of aluminum heatsink extrusion is an important aspect for companies to improve their competitiveness. The following editor will share the causes of extruded aluminum heatsink scratches, rubs, and bruises and their solutions.

1. Phenomenon

Scratches, abrasions, and bruises are the surface damage of the custom heat sink when the profile flows out from the die hole and comes into contact with tools, equipment, etc. in the subsequent process.

2. The main reason

1) There are bare metal on the discharge track or swing bed or hard inclusions in the graphite strip, which will scratch the surface of aluminum extrusion heat sink profiles when it comes in contact with the profile.

2) When the fork rod sends the profile from the discharge rail to the swing bed, the profile is bruised due to the excessive speed.

3) There are impurities or segregation of ingot components on the surface of the ingot. When there are a lot of segregation floats on the surface of the ingot and the ingot has not been homogenized or the homogenization effect is not good, there are a certain number of hard metal particles in the ingot, and when the metal flows through the working belt during the extrusion process , These segregation floats or hard metal particles adhere to the surface of the working belt or cause damage to the working belt, and ultimately cause scratches on the surface of the profile.