"Burrs" and " Chatter Marks " are common defects in the extruded aluminum materials. " Burrs " are not ovivious, without careful observation or hand touch you may not find them. Chatter marks are the result of a relative concentrated granules on the surface of the aluminum .
Detriment: in the procssing of teh oxidation and electrophoresis aluminum matrial , and spraying aluminum, it is difficult to remove burrs and chatter marks.,which affects the surface of the aluminum profile, generating defecive products.
Generally, manufacturers use sandblasting treatment on the surface , and then adopt the powdering or painting tratment. And the effect is clear. However,the oxidation of the photoelectric material is very difficult to deal with, causing great troubles to the aluminum extrusion process.Therefore, it is important to observe, summarize and take appropriate measures in practice to reduce or avoid such defects.
The inappropriate design of mold , the improper extrusion parameters ,as well as casting rod’s defects are likely to form a clay in the cavity , and ultimately results burrs and chatter mark