Surface of the bubble
① Definition: aluninium plates, sheets and strip surface irregularities of circular cavities or projections. Raised edge sleek, asymmetric top and bottom plates, irregular distribution.
② main causes
Ingot surface uneven, dirty, surface segregation tumor depth is deep; small milling face amount or surface defects, such as: deep dents or marks cutter; between the aluminum plate and ingot emulsion or air into the package; ingot The heating temperature is too high or too long.
Skid Proof Floor Aluminum Tread Plate
glitch
① Definition: aluminium plate, strip sheared, fine edge there is a short wire of varying sizes or sharp and thin metal thorns.
② main causes
Cutting edge is not sharp; poor lubrication cutting edge; blade clearance and the overlap amount improperly adjusted.
Aluminum Sheet,aluminium plate curtain wall
Impression
① Definition: plate, strip the surface there is a single or periodic depressions or projections. Smooth depressions or protrusions.
② main causes
Surface roll, guide rolls and other sticky dirt or metal shavings; other process equipment (such as a leveler, guide roller) surface defects or dirt adheres; sleeve surface dirty, uneven and existing smooth projections; when coiling aluminum with adhesion foreign body;
Lobed edges
① Definition: plate, strip edge rupture, severe serrated.
② main causes
Ingot temperature is low, intermediate annealing or homogenization is insufficient, → metal plastic poor; improper roll control, the plates with edge tensile stress; the side clad aluminum incomplete; facet damage, can not be eliminated after trimming ; pass processing rate is too large; cold rolling coiling tension adjustment inappropriate.
Bumps
Web bumps, bruises plate
Definition of Reason: Injury plate, strip during handling or storage process, after the collision with other objects on the surface or end surface generated
Holes
① Definition: penetrating plate, strip hole or holes.
② main causes
The presence of the blank before rolling slag, stick injury, compression stroke, hole; after pressed into the material by rolling off.
brazed aluminum plate fin heat exchanger
Nonmetallic pushed
① Definition: pressed into plates with the surface of the non-metallic inclusions. Non-metallic material is pressed into spotty, elongated or irregular shape, color changes were pushed differ.
② main causes
Production equipment or the environment unclean; rolling process lubricant unclean; blank non-metallic foreign body; rub slab surface scratches, sludge and other non-metallic foreign bodies left in the depression; the production process, non-metallic foreign bodies fall to the plate strip surface.