Case Knife System

Function/Description

The definition chamber knife or case knife means semi-or completely closed roller application systems. But in general, the coating paste is not fed to the application roller by dipping, but from chambers placed either in front of the application roller or from above. A closed or open paste basin which is placed in front of or on the applciation roller, guarantees a controlled feeding of the coating raw material.

The closed system facilitates the processing of volatile coating raw materials and is thus interesting for many technical purposes. With the case knife, the front and the rear side of the attached paste basin are each constructed as knives. These knives facilitate a pre- metering of the coating paste. The applicating roller may be a chrome-plated, polished roller or an engraved roller with a special design. The sideways limiters of the case attachment are latterally adjustable and can be used for an application across the whole width of the substrate. A lamellar desing can be achieved by using several limiters. The rotating direction and speed of the application roller are adjustable.

By the variable setting of the coating system described, diverse effects can be achieved when applicating the coating paste onto the substrate or rather the carrier. When highly viscous coating raw materials are concerned, the applicating roller is mostly used in the reverse operation to realise the greasing of the paste onto the substrate. Generally, the combination of roller and knife application guarantee an even and exact coat.

Examples