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3.11
Longitudinal cutters
Depending on the application the Repak RE20 can be equipped with various longitudinal
cutting facilities. The longitudinal cutting systems can be divided in the following groups:
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Rotary knives
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Squeezing knives
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Roll and shear strip cutter
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Roll and shear line cutter
3.11.1 Rotary knives
The rotary knife cutter separates the packages completely from each other in the longitudinal
direction. (see Figure 3.21.) This is generally used for flexible films.
The cutting is performed by a number of rotating blades. The blades are adjustable along their
axis and are mounted on a shaft which is driven by an electric motor.
A plate above the film and support bars below the film holds the film in the correct position
during the cutting process.
The film edge trims can be removed by a film trim suction unit or the film trim rewind system.
When maintaining or cleaning the longitudinal cutter the following instructions should be
followed:
Always store the spare shaft with blades in the wooden box delivered with the machine.
The blades are sharp and delicate cutting tools. Therefore, please observe the following:
Wear chain mess gloves when changing the roller shear knife sets.
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Take care when replacing the blades. Even blunt blades can cause wounds.
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Always place the blade shaft in the protective covering supplied.
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Replace damaged or blunt blades
Figure 3.21 Longitudinal cutter
Knife shaft
Knife blades
Extra safety cover
Electric motor
