SIGMA ALUMINUMcoated aluminium coil made in China

Tel: +86 -371-86541330

How to named the quality defect in the aluminum sheet products
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aluminum coil on the produce line
Product quality defects and the defining characteristic in the process of production

Nonmetallic pressure into the aluminum sheet

Definition and features:
Non-metallic impurities into the surface of the product
Surface show obvious point or long yellow black defect

The reason :
(A) rolling engineering equipment clean:we must keep the equipment clean to produce the good aluminum coil

(B) rolling technology lubricant is not clean:we must keep the lubricant clean to produce the good aluminum coil
(C)nonmetal pumped into the  surface of the aluminum sheet in the produce line
(D) the interior of the ingot is not pure, non-metallic impurities

Metal pressure into the aluminum sheet
Definition and features:
Scrap metal or metal debris into the surface of the product
Pressure into the sag of appearing after shave off size or holes, destroy the continuity of the product surface

The reason:
(A) billet surface of metal into objects or metal scrap
(B)  billet shear or shear burr fall into the mother coil,blank coil
(C) roll or guide roller sticky aluminum
(D) in the process of rolling,the  metal debris fell on the  surface of products

We can supply aluminum plastic composite panel,Color Coated aluminum coils ,PVDF Coated aluminum coils, 
Aluminum tread plate,aluminum circle,aluminum foil,aluminum sheet,aluminum plate,Household Foil, Air-container Foil,
 Cable Foil, Electronic Capacitor Foil, Medicine Foil,Blister Foil, Flexible Packaging Foil, Aluminum Sheet, Aluminum Coil,
CTP Stock, Litho Stock, Cap Stock,Aluminum Tread Plate, Embossed Coil, Mirror Panels, Cans Cover Materials, Aerospace
 Aluminum, Mold Aluminum Materials, etc. At the same time, we also accept OEM/ODM production according to requirements
 of customers.

Whenever you have a need for any of our products, please feel free to contact us .

Henan Mintai Al.Industrial Co., Ltd is located in China's central commercial hub—Zhengzhou.
 It is one of  best and bigest  private Aluminum Industrial Co.Ltd in China.
Office Add:No.1043 room in Weilai International,No.25# building CBD business inner ring Zhengdong New district,Zhengzhou,Henan,P.R.China

Tel: 0086-371-86541330

Fax: 0086-371-86541330

Office Add:#2411 Buliding Wangding International ,Shangwuwaihuan Road,Zhengzhou City, Henan Province, China

Zip code: 450000