Betel nut (Areca Catechu Linn.), also known as areca nut, has
applications as human and animal medicine and is used in the
paint and leather industries (Niamhom and Jarimopas, 2005).
Thailand in 2003 exported US$ 13.7mof over-mature betel nut
(Niamhom et al., 2006).
In order to make use of the dry betel nut, the nut fruit has
firstly to be dehusked into a nut. Fig. 1 depicts the structure of
the dry over-mature betel nut fruit. As can be seen, it
comprises of a nut firmly attached to a husk on the side that is
closest to the stem, while a gap exists on the other side
because of the separation of the nut from the husk as a result
of loss of moisture.
The mechanical properties of the areca nut in relation to
dehusking were studied by Balasubramanian and Panwar
(1986). They have found that lateral shear with a rubbing action
might be suitable for dehusking the fruit. They have furthernoted that the moisture content of the dry fruit should be in the
range of 5–6% w.b. for the technique to be most efficiently used.
Prior to this, Baboo (1981) developed a device for
dehusking dry areca nut fruit. The device comprised
a scissor mechanism, a frame, a platform and a pedal
operated lever mechanism. The device, which was operated
by two workers, could produce 13.4 kg of areca nut per hour.
Earlier still, Wang (1963) proposed a mathematical model for
the design of a frictional roller poha-berry husking machine.
The model not only indicated that both friction and normal
forces caused the husking of the berry but also provided an
estimate of roller size.
Betel nut (Areca Catechu Linn.), also known as areca nut, has
applications as human and animal medicine and is used in the
paint and leather industries (Niamhom and Jarimopas, 2005).
Thailand in 2003 exported US$ 13.7mof over-mature betel nut
(Niamhom et al., 2006).
In order to make use of the dry betel nut, the nut fruit has
firstly to be dehusked into a nut. Fig. 1 depicts the structure of
the dry over-mature betel nut fruit. As can be seen, it
comprises of a nut firmly attached to a husk on the side that is
closest to the stem, while a gap exists on the other side
because of the separation of the nut from the husk as a result
of loss of moisture.
The mechanical properties of the areca nut in relation to
dehusking were studied by Balasubramanian and Panwar
(1986). They have found that lateral shear with a rubbing action
might be suitable for dehusking the fruit. They have furthernoted that the moisture content of the dry fruit should be in the
range of 5–6% w.b. for the technique to be most efficiently used.
Prior to this, Baboo (1981) developed a device for
dehusking dry areca nut fruit. The device comprised
a scissor mechanism, a frame, a platform and a pedal
operated lever mechanism. The device, which was operated
by two workers, could produce 13.4 kg of areca nut per hour.
Earlier still, Wang (1963) proposed a mathematical model for
the design of a frictional roller poha-berry husking machine.
The model not only indicated that both friction and normal
forces caused the husking of the berry but also provided an
estimate of roller size.
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