Pneumatic Cylinders

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• Pneumatic Cylinders

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Introduction

• Cylinders convert the pressure into straight line
  mechanical force and motion
• Compressed air entering one end of the cylinder
  and causes the piston to move
• Higher pressure will created a greater force
• The speed of piston is determined by the flow
  rate of compressed air

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Features of Pneumatic cylinders

• Single acting cylinder
• It has power stroke in one direction only
• A small air vent is require at the dead end of
  the cylinder to prevent air locking
• A compression spring returns the piston to its
  original position when the compressed is
  exhausted
• Used for clamping, ejecting, lifting feeding

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Features of Pneumatic cylinders

• Double acting cylinder
• It has power stroke in both directions
• No air vent is needed as pressure is require in
  both extending and retracting motions

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Features of Pneumatic cylinders

• Cylinder cushioning
• they are double acting cylinder come with the
  feature of cushioning
• piston will slow down toward the end of the
  stroke in either direction of movement

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Types of Cylinders

• Cylinder with double sided piston rod
• with single piston rod emerging from both of the
  cylinder
• used when equal thrust or speed in both direction
  to be equaled

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Types of Cylinders

• Tandem cylinder
• consist of 2 or more cylinders mounted inline
  with pistons connected by common piston rod
• increased output force
• smaller diameter
• shorter stroke

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Types of Cylinders

• Multi-position cylinder
• consist of two or more cylinder connected
  together
• two cylinder having a different stroke length
• two cylinder placed back to back will enable of
  four different positions

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Types of Cylinders

• Impact Cylinder
• producing high kinetic energy and high thrust
• initial exposed piston area is small
• whole piston area exposed suddenly when piston
  started to move forward
• force increases and the piston accelerated
  rapidly

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Cylinder Mountings

• Mounting methods of cylinders will influence the
  service life
• 3 main categories of mounting
• centerline mounting
• foot mounting
• pivot mounting