McHale
991L
Round Bale Wrapper
26
6
Bale & Plastic Film Requirements
6.1 Bale Requirements
The bales to be wrapped should be well shaped, dense and of suitable quality for
making silage. Substandard material will not produce good quality silage regardless of
how well the bale is wrapped.
Bale width: Up to 1500 mm wide
Bale height: Diameter up to 1500 mm high
6.2 Plastic Film Requirements
It is of the utmost importance that top quality plastic film is used for wrapping bales.
Always follow plastic film manufacturer’s recommendations on the storage and use of
the film.
It is recommended that a minimum of 4
layers of film are applied to the bale. If the
material being wrapped is of a hard or stemmy nature it may be necessary to apply 6
or 8
layers to ensure a good airtight package.
The operator needs to ensure that the bale is correctly wrapped. It is good practice to
periodically check the bales after being wrapped for any torn, split or punctured plastic
film. If the stubble in a particular field has a tendency to puncture the plastic film, it is
strongly advised to wrap the bales at the stack, where there may be more control over
ground conditions.
The plastic film must be applied to the centre of the bale. If it is too low or too high adjust
the dispenser height as appropriate. See “Dispenser height” on page 54.
To determine the number of table rotations required to wrap a bale, carry out the
following procedure:
1.
Count the number of table revolutions to cover the bale completely with plastic
film.
2.
Add 1 to this number.
3.
Multiply this resultant figure by 2 (for 4 film layers) or 3 (for 6 film layers)
Example:
Number of rotations to cover the bale: 7
Number of rotations to apply 4 layers of film to the bale: (7+1) x 2 = 16
