Double-Roll Rubber Sheet Calender with 360mm Cylinder Diameter 3 Years Warranty and 1000mm to 3000mm Roller Length
A double-roll calender is a precision machine used in rubber and plastics manufacturing to produce continuous sheets of material with uniform thickness. It features two massive, counter-rotating rolls that process raw rubber compound into smooth, consistent sheets through controlled pressure and shear forces.
- Rolls (Bowls): Precision-machined chilled cast iron cylinders with temperature control capabilities
- Frame: Heavy-duty structure designed to withstand operational forces
- Nip Adjustment Mechanism: Hydraulic or electromechanical system for precise gap control
- Drive System: Powerful motor and gearbox for synchronized roll rotation
- Auxiliary Equipment: Includes feed conveyors, stock blenders, cooling trains, and wind-up units
- Preparation: Rubber compound is pre-warmed and homogenized
- Feeding: Material is introduced into the nip between rolls
- Calendering: Pressure, shear, and heat transform rubber into uniform sheets
- Take-off: Sheet is removed from calender rolls
- Cooling: Sheet passes through cooling system to set dimensions
- Winding: Finished product is collected in roll form
| Advantages | Disadvantages |
|---|---|
| High production speed for large volumes | Limited precision compared to 4-roll calenders |
| Excellent surface finish quality | Potential sheet crown effect requiring correction |
| Simpler design with lower maintenance costs | Limited to basic sheeting applications |
Two-Roll Mill: Primarily for mixing and warming, with different roll speeds
Three-Roll Calender: Offers better control and gauge uniformity
Four-Roll Calender: Advanced configuration for precision sheeting and fabric coating
- Rubber mats and flooring production
- Gasket and seal manufacturing
- Industrial rubber sheet production
- Packing sheet fabrication
- Intermediate sheets for molding processes
- Precise temperature control for material consistency
- Accurate parallel nip adjustment across roll width
- Roll bending compensation for uniform thickness
- Controlled rubber feed quantity into nip
The double-roll rubber sheet calender is a fundamental industrial machine for efficient, continuous rubber sheet production. While less versatile than more complex calenders, its robust design, operational simplicity, and cost-effectiveness make it essential for many rubber manufacturing applications.
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