Lamina conditioning

Tobacco machinery sales

Direct Conditioning Cylinder (DCC)

The Garbuio DCC provides effective opening and conditioning of all types of lamina.

Opening and Conditioning all types of Lamina
Before processing starts, the cylinder is preheated by circulating warm dry air throughout. This minimises sticking of tobacco particles to the cylinder walls when processing starts, thus preventing losses when the equipment is cleaned.

Slices of lamina enter the cylinder and are immediately exposed to the mechanical opening action of radial pins mounted on the cylinder walls. These pins lift and tumble the slices, exposing them to a co-current flow of high humidity warm air and diffuse steam sprays at the infeed end of the cylinder.

Immediately the moisture in the process air condenses on the lamina particles, raising both their moisture content and temperature. This has the effect of opening or unfolding the lamina, enlarging the surface pores so that the product becomes receptive to further moisture addition.

As the tobacco progresses along the cylinder it is contacted by a finely atomised spray of water which raises the moisture content of the product to the desired level. Special paddles in this part of the cylinder present the product in a distributed cascade to the water spray, thus ensuring effective and uniform moisture addition to all surfaces.

At the delivery end of the cylinder the process air passes through a self-cleaning rotary screen and is recirculated to the infeed by a fan, while the product is discharged in a uniform stream onto the take-off conveyor. As an option, the cylinder discharge hood can be trace heated, again to minimise tobacco waste.

Jet Conditioning Cylinder (JCC)

The Garbuio Jet Conditioning Cylinder (JCC) is a highly efficient opening and conditioning system for all types of lamina, including ‘farm cut’.

Steam assisted Lamina Opening and Conditioning
The JCC was developed especially for heavily padded products which are difficult to open, but also gives excellent results on more normal products.

The JCC is preheated by recirculating warm air through the cylinder. When product enters, it is exposed to the action of a large number of steam jets in the ends of each of the lifting pins. The lifting pins pick up and cascade the product exposing it to the action of steam sprays from all directions.

This first stage of steaming ensures that the lamina is thoroughly unfolded and opened before it is subjected to the wetting sprays in the second zone of the cylinder.

In the wetting zone, the tip of each lifting pin incorporates a self-atomising water spray nozzle, so the tobacco is progressively moistened by sprays from all directions as it advances along the cylinder. The progressive moisture addition ensures that the tobacco is able to absorb the water without excessive surface wetting, and the risk of discolouration is eliminated.

At the start of processing (run-in), the process air flow is counter-current, in order to hold back the product and increase its retention time. During normal operation, little or no process air flow is required. At the end of processing (run-out) the process air flow direction is reversed in order to increase the speed of product along the cylinder and reduce the run-out time. The air extraction from the cylinder hoods passes through self cleaning rotary sieves to minimise exhaust system contamination.

The net result is well opened product with uniform moisture, minimal pads and high fill value.

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Direct Conditioning Cylinder (DCC)

  • Efficiently opens all types of lamina tobacco
  • Minimum pads in conditioned product
  • Uniform product moisture
  • Clean operation
  • Easy to maintain
  • Mechanically robust and reliable
     

Jet Conditioning Cylinder (JCC)

  • Super-efficient opening
  • Ideal for heavily padded product
  • Separate steaming and wetting zones
  • Hot air preheat system
  • Minimum process air during operation
  • Rapid run-in and run-out