aluminium cladding for ductwork
Oil pollution is a common quality problem: oil pollution refers to the excessive oil on the surface of the aluminum tip after rolling. And the excess oil other than the rolling oil film is carried, which is visible to the naked eye during the process of slitting production and finished product inspection Oily surface. These oils are mainly caused by throwing, splashing, dripping on the surface of the box at the roll neck or above and below the exit of the rolling mill, abnormalities in the roll cleaner of the rolling mill, and dripping oil from the rolling mill thickness measuring head, and are often dirty and complex.
Solution: Strictly inspect the production equipment before production. If there is too much oil in the equipment, clean it in time and find the cause. At the same time, clean the surface of the production product. If the product that can not be cleaned is scrapped, the aluminum cladding for ductwork is prohibited from entering the warehouse and entering the market.
Scratches are frequent visitors of quality problems: scratches, scrapes, and bruises are intermittent or continuous single groove-like scars on the surface of aluminum cladding for ductwork. Generally, it is produced when sharp objects slide relative to the foil surface after contact.
The main reasons: the surface of rollers and guide rollers have sharp defects or hard debris; the mechanical guide rollers for shearing, winding, and slitting have sharp defects or dry debris on the guide path. Scratch: Bundles (or groups) of scars distributed on the surface of the box material due to relative sliding or misalignment between the edges and surfaces, or surface-to-surface contact.
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