352
K. S. Kulkarni and R. Adivarekar
Fig. 1 Photo of four cutter shearing machine (a) and line diagram of two cutter (b) and four cutter
(c)
2.2.1 Advanced Shearing and Cropping Machine
It has following features:
• Electronically controlled fabric feeding device to ensure uniform and even fabric
transport
• Specially designed soft bed under the cutter to avoid damage to the fabric in process
• Electronic seam joint sensors to protect rollers from fabric joints
• Metal detectors which protects the rollers from iron particles which might be
embedded in the fabric. The sensor, when detects iron particles, stops the machine
by activating limit switch. The machine restarts once the metal particles are
removed
• Gear systems are replaced by DC drives. This enables the modified machines to
run at higher speeds.
2.2.2 Main Components of Shearing Machine
Shearing Unit
It is composed of two sharpened elements, that are working like scissors. The unit is
equipped with spiral cylinder and high-quality sharpened ledger blade. These spiral
blades are installed on solid cylinder. the number of blades varies from 10 to 24,
which are fixed with a helical displacement. The speed of shearing cylinder can be
continuously adjusted within the range of 600–1200 rpm. The rotating shearing cylinder on the sharpened ledger blade creates a continuously cutting effect. To achieve
better cutting performance, the height of ledger blade should match at the centre of
shearing cylinder (called as cutting point). The fibres cut during the operation are
removed by a vacuum system. Shearing quality directly depends on quality of suction
applied (Fig. 2).
K. S. Kulkarni and R. Adivarekar
Fig. 1 Photo of four cutter shearing machine (a) and line diagram of two cutter (b) and four cutter
(c)
2.2.1 Advanced Shearing and Cropping Machine
It has following features:
• Electronically controlled fabric feeding device to ensure uniform and even fabric
transport
• Specially designed soft bed under the cutter to avoid damage to the fabric in process
• Electronic seam joint sensors to protect rollers from fabric joints
• Metal detectors which protects the rollers from iron particles which might be
embedded in the fabric. The sensor, when detects iron particles, stops the machine
by activating limit switch. The machine restarts once the metal particles are
removed
• Gear systems are replaced by DC drives. This enables the modified machines to
run at higher speeds.
2.2.2 Main Components of Shearing Machine
Shearing Unit
It is composed of two sharpened elements, that are working like scissors. The unit is
equipped with spiral cylinder and high-quality sharpened ledger blade. These spiral
blades are installed on solid cylinder. the number of blades varies from 10 to 24,
which are fixed with a helical displacement. The speed of shearing cylinder can be
continuously adjusted within the range of 600–1200 rpm. The rotating shearing cylinder on the sharpened ledger blade creates a continuously cutting effect. To achieve
better cutting performance, the height of ledger blade should match at the centre of
shearing cylinder (called as cutting point). The fibres cut during the operation are
removed by a vacuum system. Shearing quality directly depends on quality of suction
applied (Fig. 2).