BLO-WASH – Scouring Equipment

The BLO-WASH range is the culmination of a development programme carried out to avoid these faults in which the prevention of running lines has been resolved by eliminating nip rollers.

The  Blo-Wash piece-scouring machine range is a new concept in textile finishing equipment and offers many features:

  • Rope scouring / softening of a huge range of fabrics
  • No fears of running marks
  • Low maintenance costs
  • Easy to operate
  • Easy to clean
  • Low power consumption
  • Low water consumption and Liquor / Goods ratio
  • Manual or Automatic operation
  • Unique circulation system ensuring even application of chemicals
  • Constant pH monitoring
Traditional machines use a pair of nip rollers to drive cloth. This causes running lines due to nip pressure and damages due to the necessity of stripping cloth from the nip rollers (trapping), particularly on lightweight fabrics.

schematic

Operating Principle
The Blo-wash machine works on the principle of a double venturi system contained in a precisley engineered channel head. The first venturi passes circulating scouring liquor or fresh rinsing water via a self-priming centrifugal pump, and the second circulated air. Both venturis have filtration systems in line to avoid blockages with lint etc. Fabric in rope form is presented to the system using a single fabric lift roller having minimal fabric contact, thus avoiding the formulation of creases in the fabric rope – there are no nip rollers in the machine.

Following the venturi system is a specially designed blow tube in which the fabric is carried on a cushion of air or air/liquor mixture. On exiting the blow tube, the air – air/liquor mixture dissipates over a large area thus opening the fabric rope, further avoiding the formulation of creases.

The fabric running speed, controlled by the fabric lift roller, is variable and determined by the total weight of the fabric and liquor passing through the blow tube. Typically scouring speeds of 350 m/min are achievable whilst dry tumbling speeds of 700 m/min are common. At these speeds the fabric is thrown against a perforated plate installed in the rear door of the machine achieving a softening / milling effect. Within the perforated rear door is a catchment tray through which liquor passes for re-circulation via the centrifugal pump.

pH monitoring is installed and chemical additions are made through a tank installed between between the catchment tray and the circulation pump. This system enables even application of chemicals such as chemical softeners and fireproofing agants for wool / woolen fabrics. Heating of the liquor using a steam coil installed in the sub-base of the main tank enables processing temperatures up to 80°C to be reached.

blo-wash open

TECHNICAL FEATURES

  • Manufactured using quality 316 stainless steel
  • In-line liquor and air filtration
  • Circulation system enabling even application of chemicals
  • Manual or Automatic control utilising touch screen technology
  • Standard machine has two channels each capable of processing 500 metres of fabric at weights of between 100 and 600 gramms/metre
  • Rinsing times typically 50% that of standard scouring machines

TECHNICAL DATA

NUMBER OF CHANNELS 1 (Single) 2 (Standard)
Fabric capacity (dry) 200Kg 400Kg
Processing speeds 30-700 m/min
Approx. total power requirement 30Kw 48Kw
Fabric lift roller drive 4Kw 5.5Kw
Fan drive 15Kw 2 x 15Kw
Water pump 2.2Kw 4Kw
Water feed (hot & cold) 1 1/2″ BSP 2″ BSP
Water pressure 2-4 Bar
Steam feed 1″ BSP
Compressed air supply 1.5m3/Hr @ 4 Bar
Drain (minimum) 200mm dia.
Floor area 2.1 x 3.0m 2.9 x 3.0m
Machine weight (approx. – unladen) 2.8 tonne 3.5 tonne

 

blo-wash working

FABRICS SUCCESSFULLY PROCESSED IN BLO-WASH MACHINES

  1. Featherweight fabrics used in 100% wool/worsted, cashmere or linen
  2. Polyester / viscose and polyester / wool blends for scouring and softening
  3. Poylester / wool blends with Lycra, at 80°C, to promote initial development of stretch
  4. 100% nylon workwear fabrics
  5. Woolen coatings, jacketings and fabrics for travel rugs and blankets
  6. 100% cotton fashion fabrics
  7. Silk and blends of silk with viscose, wool and other fibres
  8. Acrylic fabrics with chenille weft
  9. Dry tumbling to achieve “stone-washed effects”

Contol System
The Blo-Wash is controlled by means of a touch screen. From the main screen, the various control screens can be activated.

blo-wash control1.fw

Manual Control
All operations may be controlled manually, including the lift roller speed which is infinitely variable up to 700m/min. A manual process timer is included. The system status and any faults present are displayed.

blo-wash control2.fw

Automatic Control
The selected cycle program is activated from the automatic screen, and its progress monitored. The cycle may be halted at any time to enable process inspection. Again, the system status and any faults present are displayed.

blo-wash control 3.fw

Program Preparation
Many different programs may be prepared and stored within the control system, which can be developed for different fabrics and required effects. Variables which may be controlled include step times, fabric speed, and liquor temperatures throughout the various stages of a program

blo-wash control 4.fw

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