Calendering is the process by which a rubber compound or
plastic formulation is given a definite continuous
smooth, uniform sheeting or to coat or friction textiles
Examples of calendered items are Hospital
sheeting, PVC sheeting,calendered NTCF etc.
Note the terms “definite” and “continuous” –Definite
because the nip or the roll profile decide the shape
of the article and Continuous because the product
can be taken to very large lengths.
“Calender ” is the equipment which carries out the
process of calendering.
The Classification of Calenders is based on
1. The Number of rolls
2. The Position or Orientation of the rolls
2 roll Calender Vertical Type
Simplest of this
genesis
Can be used only for
production of Gum
sheets
plastic formulation is given a definite continuous
smooth, uniform sheeting or to coat or friction textiles
Examples of calendered items are Hospital
sheeting, PVC sheeting,calendered NTCF etc.
Note the terms “definite” and “continuous” –Definite
because the nip or the roll profile decide the shape
of the article and Continuous because the product
can be taken to very large lengths.
“Calender ” is the equipment which carries out the
process of calendering.
The Classification of Calenders is based on
1. The Number of rolls
2. The Position or Orientation of the rolls
2 roll Calender Vertical Type
Simplest of this
genesis
Can be used only for
production of Gum
sheets
3 roll Calender
Also called the Universal Calender
Most flexible and reliable machine today
3 roll Calender Vertical Stack
Oldest & most common
configuration
Reactive forces are in a single
vertical plane
3 roll Calender Off set Stack
Reactive forces are not in a single
vertical plane
Deflection of only the top roll acts on
the bottom roll
Gauge is not affected by the weight
of the top roll
Reactive forces are not in a single
vertical plane
Deflection of only the top roll acts on
the bottom roll
Gauge is not affected by the weight
of the top roll
Deflection of the top & middle acts
on the bottom roll
Weight of the top roll affects the
Gauge
4 roll Calender Vertical Stack (I)
4 roll Calenders are
often termed as the
Modern Calenders
4 roll Calenders are
often termed as the
Modern Calenders
4 roll Calender Offset Stack ‘Z’
Offset Stacks are used
basically for feeding
advantages and
reduction in height of
the equipment
Offset Stacks are used
basically for feeding
advantages and
reduction in height of
the equipment
4 roll Calender Offset Stack Inverted ‘L”
Offset Stacks are used
basically for feeding
advantages and
reduction in height of the equipment
4 roll Calender Offset Stack ‘S’
Offset Stacks are used
basically for feeding
advantages and
reduction in height of
the equipment
Offset Stacks are used
basically for feeding
advantages and
reduction in height of
the equipment
2 roll Calender Horizontal Type
Easiest to feed using strips
Easiest to Maintain the bank across the roll
2 roll Calender Tilted Roll, Mount on Frame
2 roll Calender Tilted Roll, Swing Arm
Tilted position allows
the conveyor feeding
and allows the sheet to
be taken off for remote application
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