Principalele defecte ale rolei jumbo din folie de aluminiu sunt:

Principalele defecte ale rolei jumbo din folie de aluminiu sunt:

(1) Pinhole. Pinholes are the main defect of aluminium foil jumbo roll. In the raw material, on the roll, in the rolling oil, and even the dust in the air reaches about 6μm and enters the roll gap, it will cause pinholes. Therefore, it is impossible for 6μm aluminium foil jumbo roll to have no pinholes. It can only be evaluated by how much and its size. Due to the improvement of aluminium foil jumbo roll rolling conditions, especially the effective filtration of dust and rolling oil and the setting of convenient roll changing system, the number of pinholes in aluminium foil jumbo roll is more and more dependent on the metallurgical quality of raw materials and processing defects. It is difficult to find the corresponding relationship with the original defect when the defect of the raw material falls off. It is generally believed that pinholes are mainly related to gas content, inclusions, compounds and composition segregation. Effective aluminum liquid purification, filtration, and grain refinement can help reduce pinholes. Of course, the use of alloying and other means to improve the hardening characteristics of the material also helps to reduce pinholes. The pinholes of 6μm aluminium foil jumbo roll rolled from high-quality hot-rolled materials can be less than 100/㎡. When the casting and rolling materials are well purified, the pinholes of 6μm aluminium foil jumbo roll are below 200/㎡. In the aluminium foil jumbo roll rolling process, there are many other factors that cause pinholes, even catastrophic, and thousands of pinholes per square meter are not uncommon. Effective filtration of rolling oil, short-term replacement of rolls and dust-proof measures are all necessary conditions to reduce pinholes in aluminium foil jumbo roll, and the use of large rolling force and small tension rolling will also help to reduce pinholes.

(2) Semn de rulare, ochi de rulare, luciu neuniform. Este în principal defectul rolei jumbo din folie de aluminiu cauzat de rolă, care este împărțit în trei tipuri: punct, linie și suprafață. Cea mai notabilă caracteristică apare în trei cicluri. Principalele motive pentru acest defect sunt: ​​măcinarea incorectă a rolelor; deteriorarea rolelor de către obiecte străine: defecte de intrare la imprimarea rolelor; oboseala de rulare; impact între role, alunecare etc. Toți factorii care pot cauza deteriorarea suprafeței rolei pot afecta rularea rolei jumbo din folie de aluminiu. Deoarece finisajul suprafeței rolei de rulare jumbo de folie de aluminiu este foarte mare, luciul ușor neuniform va afecta și starea suprafeței acesteia. Curățarea regulată a laminorului, menținerea laminorului curat, asigurarea funcționării normale a ruloului de curățat, schimbarea regulată a rolei și măcinarea rezonabilă sunt condițiile de bază pentru a asigura suprafața uniformă a rolei jumbo de folie de aluminiu după rulare.