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RBNO-I Horizontal Dyeing System

The patented RBNO horizontal yarn dyeing machine has been shown as a world premiere during ITMA 83 International Exhibition.

RBNO is an international best seller for yarn package dyeing, with over 700 machines installed worldwide, covering all the sectors of textile industry.

INNOVATIONS

  • NEW HORIZONTAL SMALL BACTHES MACHINE: RBNO-I 840 is now available to cover a production range of 35 to 200 kg
  • VARIABLE LOADING BY MEANS OF LIQUOR LEVEL LOWERING: As our vertical model RBNV-I, no more need of dummy boxes to dye variable loading. Thanks to a new hydraulic circuit design, the variable loading is realized simply lowering the liquor level.
  • PULSE RINSING SYSTEM NOW AVAILABLE FOR HORIZONTAL MACHINE: The new hydraulic circuit now allows the use of the much appreciated water saving Pulse Rinsing® already implemented since 10 years now, on our RBNVI vertical version

AIR PAD PRESSURIZATION

RBNV-I, as all Loris Bellini dyeing machines, is Air Padded since the beginning of the 50’s. RBNV-I dyeing machine can be pressurized at 5 Bar at low liquor temperature.
The relevant advantages to this solution are:

  • Lower Consumption. Only pump and carrier volumes are flooded, with reduction of liquor ratio to a minimum water, steam and power consumption. Substantial savings are realized in term of cooling water, steam and electric power.
  • Low Emissions. The air pad operates as a double chamber to reduce heat emissions in the dye-house.
    NO external Expansion Tank means no emission of chemical vapours.
    NO external Expansion Tank means no continuous external circulation, thus liquor expansion volume realized directly into the autoclave.
  • Dyestuff exhaustion is perfectly equalized.
  • Air pad pressurization allows to inject dyestuffs and chemicals directly into the main liquor circuit by means of single tank or a multi tank colour-kitchen.
  • Air Pad Pressurization allows the machine to be standard equipped with dynamic HYDRO-EXTRACTION DEVICE by compressed air.
  • VAT DYEING: During cotton dyeing with VAT dyestuffs the dyeing liquor is not subject to a continuous oxidation by external air.

GROUND-FLOOR INSTALLATION

The complete RBNO-I system (dyeing machines, dryers, handling equipment) is installed at floor level.
Dyeing carriers are loaded and unloaded horizontally and are transported at ground level by a rail-mounted shuttle
system or wheeled trolleys.

  • No Crane, and all the relevant infrastructure, needed
  • Elimination of underground civil works

HELICOCENTRIFUGAL PUMP

The heart of RBNV-I dyeing machine is the extremely efficient HELICOCENTRIFUGAL type liquor circulation pump, which is a mixed design between an axial and a centrifugal impeller, specifically designed to cover the complete range of differential pressures (Delta P) from 0.2 up to 2.5 Bar.

Automatic reversal of liquor flow direction is performed at preset time intervals by means of a special Flow Reversal Device integrated into the pump and consisting of a rotating elbow which slides sideways the delivery mouthpiece from inside-out (I-O) to outside-in (O-I) direction and vice versa. Precision positioning of reversal curve is originated by a combined pneumatic-oleodynamic system (PC), in order to perform a very smooth liquor flow reversal without hammering effects.

Liquor flow reversal is made with motor in operation in order to avoid peak power absorption due to delta-star motor restarting.
The circulation pump is equipped with cooling-free mechanical seals.

The helicocentrifugal pump has been entirely engineered by Loris Bellini, and each one is tested on our own computer controlled pump testing centre.

RBNO-I FEATURES:

  • Standard design and manufacturing features:
  • Machine loading capacities from 25 to 1250 kgs. (2500 kg cupled)
  • Dynamic Hydro extraction Device.
  • Pressure rating of 5.0 kg/cm2, up to 160°C temperature.
  • Construction in AISI 316 stainless steel, for all the part in contact with dyeing liquor.
  • Water protected motors (IEC Standards IP54).
  • Three-level safety systems.
  • Magneto-thermal motor protections.
  • Heat exchangers rated for 15.0 kg/cm2 operating pressure.
  • Heating gradient 5°C./minute (range 20-80°C steam pressure 6.0 kg/cm2) Cooling gradient 3°C./minute (range 130-108°C water temp. 15°C, pressure 1.5kg/cm2).
  • Rapid lid locking system.