【China Aluminum Industry Co., Ltd.】Aluminum extrusion products have rough longitudinal or lateral grooves and scratches on the surface of the aluminum extrusion products. The scratches from the surface are mostly due to the foreign matter on the mold or rough machining at the empty knife. The kind of convex scratches appearing at the corners of the product are due to the cracks in the extrusion die. The lateral scratches or scratches are mainly due to the hard objects protruding from the cold bed when the product is transported from the sliding table to the finished sawing table. The product is scratched, but also in the charging, handling. Scratches, scratches are common surface defects in the aluminum extrusion process,

The main elimination methods are:

1) The extrusion die work belt should be smooth, smooth, and the extrusion die should also be smooth.

2) Check carefully when installing the mold to prevent the use of small cracks in the mold. The mold radius should be noted when designing the mold.

3) Always check the cooling bed, finished product storage table, to prevent scratching of products with hard protrusions.

4) When loading materials should be placed more flexible than the article, transport, lifting should be smooth, careful operation

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