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Polymer Doctor Blades
90 - 150 Per meters
500 Meter (MOQ)
Polymer Doctor Blades
100 - 1,000 Per Box
50 Box (MOQ)
In a single blade ink system or dual blade ink system, the blade removes the excess ink from the cylinder or anilox roll to create a uniform layer of ink to be transferred to the printing plate. The blade/anilox combination is designed such that it is (chiefly) the blade which wears away, not the anilox roll. The doctor blade is a relatively cheap and disposable consumable, while the gravure cylinder or flexo anilox is a more expensive component of the press. Typical materials for the blade are steel or polymer:[3] gravure cylinders are normally hard-chrome plated[4] and flexo aniloxes may be chromed or ceramic.[5] Important process variables in gravure coating & printing are the rotational position at which the blade wipes the cylinder, the angle that the blade makes with the tangent to the cylinder at the contact point, and the pressure applied to the blade.[6] Fine adjustment of in-and-out position, independently on left and right, must also be possible, in order to compensate for any misalignment between blade geometry and cylinder axis. These requirements are fulfilled by a doctor blade assembly which includes a doctor blade holder. Doctor blades are traditionally designed in 3 main tip configurations: straight, bevel and lamella. A straight doctor blade has a straight, blunt edge and is used for lower quality print. A beveled doctor blade is cut at an angle creating a beveled edge. A lamella tip is a doctor blade with a unique geometry that is thin at the tip, gradually becoming larger in a step pattern or other design. The bevel and lamella designs allow for a smaller blade-to-anilox contact roll which increases its ability to precisely shear the anilox roll or gravure cylinder.
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