The aluminum alloy shell profile die of the docking station plays an important role in the profile stretching production process, and is the basic tool to ensure the product molding and make it have the correct shape, size and accuracy. In the actual production process, the profile die has several adverse effects on the product surface effect:
Generation of stripes on the surface of aluminum alloy profiles
Stripes appear on the outer surface of the profile, which is more obvious after anodizing. This defect is mainly found in the parts with large wall thickness difference of profiles, the welding parts of the metal under the splitter bridge, and the back side with "branches" on the inside and threaded holes. Cause: surface streaks caused by insufficient or excessive metal flow at the "branches" and threaded holes on the inner side of the profile; Stripes on the profile surface caused by the welding area under the die splitter bridge; There are problems in sectional drawing design of profiles. Due to the large wall thickness difference of profiles, the parts with sudden changes in the length of the working belt will have striped color difference after anodizing in Shenzhen. Because the cooling capacity of the machine is insufficient, the black speckle area after anodizing will be caused; The quality of the slab itself is poor, which affects the stripe color difference after anodizing.
The way of unreasonable bending and twisting of aluminum shell profiles of the docking station:
The working belt of the die core and the lower die hole is not matched properly, which causes uneven metal flow velocity at various parts of the profile; The size and position of the split hole of the symmetrical hollow profile die are processed asymmetrically, and the metal flow is uneven, which causes the uneven metal flow velocity; Diverter hole processing is irregular or there are obstacles on the die core to prevent metal flow.
Correction method: Grind the outlet part of the mold core or shunt hole with an appropriate method, and appropriately expand these shunt holes to equalize the feeding if necessary; Remove obstacles by grinding.