Balers
A baler is a machine used to compress hay
or straw into bales for easy transport and storage. A bale is the
simplest minimum package for marketing.
Balers are divided into stationary balers
and field balers. They are further classified into rectangular balers
and round balers according to the bale shape produced. According to
density of bale, they could be high (200-350 kg/m3), medium (100-200
kg/m3) or low density (<100 kg/m3) balers.
Rectangular pick-up baler
The 9KJ-1.4A rectangular pick-up baler
(Figure 6-6), made by the Inner Mongolia Baochang Livestock Machinery
Plant, is used as an example for the general structure and function of
rectangular pick-up balers. It makes bales from the straw windrow left
by the combine. The machine consists principally of a pick-up reel, a
conveying and feeding system, a compressing chamber, a bale density
adjuster, a bale length controller, a needle-and-tying mechanism, a
crank-linkage mechanism, a power transmission, and hauling system.
It is powered from the power take-off
(PTO) of the hauling tractor. The straw windrow is lifted from the
ground by a pick-up reel having spring teeth (14) and transferred
continuously to a conveying and feeding mechanism (3) as the baler
moves forward along the windrow. The conveying and feeding mechanism
(3) pushes individual charges of hay into the bale chamber (6) from the
side at intervals when the piston (2) is withdrawn. The piston
reciprocates under the function of the crank-linkage mechanism to press
the material into the bale. When the bale reaches the required length,
the needle-and-tying mechanism is engaged automatically to bind the
bale, which is then pushed out from the chamber by successive bales and
is discharged to the ground.
Rectangular bales can be lifted and loaded
either by hand or by a loading machine mounted on the side of a truck
or trailer and driven by a ground wheel. The Jilin Baicheng
Agricultural and Livestock Machinery Factory also make this kind of
baler, model 9JKC-2.7.
Figure 6-6. Structure and operation of a 9KJ-1.4A baler
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