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Roll slitting is a shearing operation that cuts a large roll of material into narrower rolls. There are two types of slitting: log slitting and rewind slitting . In log slitting the roll of material is treated as a whole (the 'log') and one or more slices are taken from it without an unrolling/re-reeling process.
Industrial applications of cutting-stock problems for high production volumes arise especially when basic material is produced in large rolls that are further cut into smaller units (see roll slitting). This is done e.g. in paper and plastic film industries but also in production of flat metals like steel or brass.
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Both print processes are suited to high speed roll-to-roll processing. [citation needed] Many converting companies will process large diameter, wide rolls of material as this increases the converting efficiency by minimising changes. On completion of the converting process the rolls may be cut into smaller rolls on a slitting machine or a ...
In addition to purchasing equipment, leasing options are often attractive. [6] Machinery must be compatible with the expected operating conditions. For example, cold temperature operations require special considerations. [7] Some industries must perform periodic washdowns of all equipment. This high pressure chemical washing puts special ...
An example of one of these machines is a slitting machine or slitter rewinder which is used to cut or slit large rolls of material into smaller rollers. Airshaft winding a plastic film. Air shaft is a machine part or shaft which tightens the core or roll on filling air. Air Shafts are of two types:
Both industrial roll-to-roll and sheet-to-sheet systems typically feature slot-dies in the range of 300 to 1000 mm in coating width, though slot-dies up to 4000 mm wide have been reported. Commercial slot-die systems are claimed to operate at speeds up to several hundred square meters per minute, [ 14 ] with roll-to-roll systems typically ...
Rotary die cutting is die cutting using a cylindrical die on a rotary press and may be known as a rotary die cutter or RDC. A long sheet or web of material will be fed through the press into an area known as a "station" which holds a rotary tool that will cut out shapes, make perforations or creases, or even cut the sheet or web into smaller parts.