Brushes and Equipment

CITRASHINE ® has for many years specialised in the manufacture of brushes for the fruit and vegetable industry. Experience has shown that it is very important to use the correct brush for any particular application. We are always at your service to select the right brush for your needs. But the following information may be helpful.

Brush Construction:
Types of brushes manufactured.
We supply two different types of brushes. Each has its own specific application.

Channel Lock Spiral Wind Brushes:
The bristles are held in an aluminium channel by a chopper covered wire and then wound round a sturdy heavy gauge aluminium tube. They are trimmed to the required diameter after winding.

• HEAVY DUTY ALUMINIUM CORE

• COMPLETE BRUSH

Three different types of winding are available.

Standard:
Spiral is at 10 mm pitch. This is the general purpose brush which is suitable for most applications for fruit and vegetables.

Close Wind:
The spiral is made as tight as possible. This type of winding is used when brushes are under high pressure sprays. The dense winding helps the fruit resist the downward pressure on the brushes caused by the spraying action.

Open Wind:
The pitch of the winding is increased by about 50%. These brushes are specially made for the following applications:

• Fruit is very wet licker bars are placed under the brushes. The speed should be about 125 rpm. Their main applications when the product enters the brushes machine either from a tank or a spraying unit, the fruit is dripping with water and the combination of the open winding and the flicking action is very effective in removing excess water prior to air drying.

• The product is covered with mud. The open winding helps reduce the tendency of the brush to clog with dirt.

Advantages of channel lock and spiral wind brushes:

• Very strong core which will not distort.

• Very durable.

• Long bristle life.

• Low cost.

• Bristles can be replaced and re-used when brush has become worn.

Tufted Brushes:

The bristles are held n tufts in holes drilled into plastic core. A stainless steel staple holds the tuft in place.
The brushes are made in 300mm long sections are positioned onto a thick walled aluminium tube fitted with standard ends.

Advantages:

• Air flows more easily through the bristles.

• Suitable for use with flickerbars.

• Should an individual section become damaged or worn it can be replaced without the cost of a complete new brush.

HEAVY DUTY ALUMINIUM CORE
INDIVIDUAL SECTIONS
COMPLETE BRUSH


Brush Ends:
There is often a tendency for the product to migrate i.e. move to one side of the brushing machine. This can be overcome by changing the brushed so that the drive and idler ends are reversed.
To enable this to be done the brush cores are fitted at both ends with an iron casting having a 25, 4 mm square hole. A special plastic insert is supplied bored to 19, 5 mm diameter for the idler end. This insert can be fitted to either end of the brush as required.

Brush Trimming:

Standard
Brushes are trimmed parallel with an outside diameter of 125 mm but other diameters and trims can be supplied to customers specifications. Parallel brushes are suitable for most applications and have the longest working life.

Corrugated
Normally supplied with a soft bristle, corrugated brushes give much improved wax application. The tumbling action of the corrugations ensures that the ends of the fruit are coated with wax. This is very important when a wax incorporating a fungicide, such as DECCOWAX, is used.
It is important to use Polyethylene for cleaning and wax application. The cross section of the bristle is special designed to hold the water or the wax.

Bristles:
Extensive research has leaded us to select bristles specifically intended for each type of application.

Polyethylene

• Used with X-shape which ensures a good memory as well as excellent water and wax retention. Several thicknesses are available to provide the most suitable brush for cleaning, drying or waxing.

• Standard colour - Wet brushing off white

• Waxing and drying black

• Polishing black

Polyolefins

• Ideal for applications where stiff bristle needed such as potato washing.

• Standard colour - White.

Nylon

• Used for drying, Applications with flicker bars.

• Standard colour - translucent white.

Drying By Means Of Brushes:
The drying of fruit over brushes forms a very important link in the preparation of fruit and vegetables for the market.
Excess water should first be removed by one of the methods described below so that the produce is damp dry when it enters the brush drier.

Two actions are required for good drying:

• The bristles spread out any droplets occurring on the skin. It is very important to use soft brushes so that the product lies deep in the brush.

• Airs passing through the brushes dry the bristles, and then the dry bristles are used to dry the product.

It will be seen that if the last brushes of the brush dryer are dry the fruit will come out dry, but immediately the last brushes become wet the produce will come out wet.
To ease the load on the brush dryer it is important to remove as much excess water from the produce as possible, before it enters the brush dryer. This should be done by using rubber donuts with pressure rollers or brushes fitted with flicker bars. It is very important that the water eliminating section has sufficient capacity to ensure that the product is only damp dry as it enters the brush dryer.

Drying Of Waxed Fruit And Vegetables:
Drying of waxed produce should be done by evaporation only. The fruit is carried aluminium or plastic rollers through a suitable air flow.

Wax should never be dried over brushes for two reasons:

• It is essential that wax is allowed to dry slowly. Many waxes contain fungicides and it is necessary for the wax to stay wet on the fruit at least 45 seconds to enable the skin to absorb the active ingredient of the fungicide.

• Wax tends to clog the bristles and it is impossible to apply wax at the recommended rate of application.