[China Aluminum Industry Network] aluminum profile surface orange peel defects reflect:
Sometimes, the appearance of orange peel wrinkles appears on the surface of aluminum after stretching. In fact, this is the surface metal cracking (grain crushing) that occurs when the surface of the aluminum profile is stressed by more than the base metal. If the force continues to increase, the stress will be affected. Until the matrix breaks.
Causes of orange peel defects on aluminum profiles:
The reason for the defect of the orange peel on the surface of the general aluminum profile is that the elongation of the aluminum profile is excessive. Generally speaking, the thicker the wall thickness, the shorter the length of the profile, in order to ensure the straightness of the profile, to prevent twisting, the easier it is to artificially increase the amount of stretching.
The elimination of orange peel defects on aluminum profiles:
(A): Reinforce molds for aluminum products that are easy to bend and twist, and control the straightness of aluminum materials.
(B): Increase the traction when the aluminum extrusion is still hot, and use the top and pressure correction measures for the hot profile on the discharge table (be careful to prevent the deformation of the profile)
(C): Control the elongation rate of aluminum profiles, in order to ensure the surface quality to take into account the straightness, the strict control of bending when stretching is within the customer's required upper limit.
(D): Control the elongation rate of aluminum profiles, in order to ensure the straightness to take into account the surface quality.
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