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what is the Burr (edge) in injection ?

Release time:2018-08-21
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Metal burr extending beyond the edge of the cut piece, view on the cut face (top) and from the bottom (bottom)

A burr is a raised edge or small piece of material remaining attached to a workpiece after a modification process.[1]

It is usually an unwanted piece of material and is removed with a deburring tool in a process called 'deburring'. Burrs are most commonly created by machining operations, such as grinding, drilling, milling, engraving or turning. It may be present in the form of a fine wire on the edge of a freshly sharpened tool or as a raised portion of a surface; this type of burr is commonly formed when a hammer strikes a surface. Deburring accounts for a significant portion of manufacturing costs.

In the printmaking technique of drypoint, burr, which gives a rich fuzzy quality to the engraved line, is highly desirable—the great problem with the drypoint medium is that the burr rapidly diminishes after as few as ten impressions are printed. 


Next:Deburring