Page 107 - Pneumatic ebook (2)_draft 13 sept 2021

Cushioning

1. High speed movement created by pneumatic cylinders result in considerable
development of shock forces on the end of the stroke when the piston
touching the cylinder cover or lid rod at the end of each stroke. This impact
force can damage the piston or piston rod. To avoid this, cushioning is Is used for large cylinders
required for cylinders.

Types of cushioning larger cylinders, the impact effect can
be absorbed by an air cushion that
decelerates the piston over the last
portion of the stroke.

Rubber Air cushions
Is used for small cylinders
buffer
often have fixed cushioning i.e. rubber
buffers, to absorb the shock and
prevent internal damage to the
cylinder.

INTRODUCTION TO PNEUMATIC SYSTEM 49