Caster thresher / Sheller

Caster thresher / Sheller

• 1.
  CASTOR DECORTICATOR (SHELLING)
• 5.
  • Shelling operationusually follows threshing of harvested crops. In shelling, the beans or kernels are extracted from the protective coat known as shell, hull or husk. Though the operations are known by different names such as shelling, dehusking, milling and decortication, they are thought to be synonymous and are specific to the crop handled. These operations essentially produce the same output, which can be directly utilized or processed further. In shelling, the input to the machine being the whole pods and the output is the kernels, whereas in threshing the input is whole crop. For shelling of some crops, the principle of threshing can be used but for others a variety of mechanisms are to be sorted for, based on the crop characteristics. It is a common practice to dry the input material on an appropriate level for a efficient shelling. The output obtained from sheller is cleaned by winnowing or aspiration methods.
• 6.
  ANGRAU CASTOR SHELLER •This castor sheller was developed at farm implements and machinery (FIM) scheme, ANGRAU, Hyderabad. The machine can be operated by two persons and has a working capacity of 100 kg/h. Cleaning of the shelled kernels should be done separately. A power operated unit has also been developed. The breakage of beans in hand operated sheller is less than 2.0%.
• 7.
  WORKING PRINCIPLE • Thechief component of the sheller is the wooden ribbed cylinder or drum of 320 mm length and 380 mm diameter. The other parts are concave, cylinder cover, feeding chute, discharge chute, drive mechanism and crank. • The clearance between the cylinder and concave can be adjusted to shell different sizes of castor beans. • Since the force required to break the shell and release the seed is moderate, wooden ribbed cylinder is the proper choice, which produces lesser broken seeds and also reduces the overall weight of the machine. • Shelling cylinder is operated by crank through a gear unit which increases the speed of the cylinder. The dried pots fed to the inlet chute will be gradually fed to the clearance and shelling takes place due to crushing and rubbing action between the cylinder and concave. • Shelled output is nothing but the seeds and broken hull pieces, which can easily be separated by a manual cleaning process of winnowing. • While the unit is in operation, one person operates the sheller by cranking and another is required to feed, collect and clean the materials.
• 8.
  Hand Operated CastorSheller