Vibrators

There are many different types of vibrators. Some are components of larger products such as those in cellphones and pagers. A vibrator is a mechanical device that is designed to generate vibrations. The vibration is often generated by an electric motor with an unbalanced mass on its driveshaft. If the motor is switched on, the rotating weight resonates.

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When Mobile phones and pagers vibrate, the vibration is produced by a small component that is built into the phone or pager. Many older, non-electronic buzzers and doorbells contain a component that vibrates for the purpose of producing a sound. Tattoo guns and some types of electric engraving tools contain a mechanism that vibrates a needle or cutting tool.

Vibrators are used in many different industrial applications both as components and as individual pieces of equipment. Many vibrators are used to help move bulk material or small component parts. The application of vibration working with the force of gravity, can often move materials through a process more effectively than other methods. Vibration is often used to position small components so that they can be gripped mechanically by automated equipment as required for assembly etc.

Vibrator feeders and vibrating hoppers are used extensively in the food, pharmaceutical and chemical industries. Vibrating screens are used to separate bulk materials in a mixture of different sized particles. For example, sand, gravel, river rock, and crushed rock and other aggregates are often separated by size using vibrating screens.

Concrete vibrators are used to consolidate fresh concrete so that entrapped air and excess water are released and the concrete settles firmly in place in the forms. Improper consolidation of concrete can cause product defects, compromise the concrete strength, and produce surface blemishes such as bug holes and honeycombing. An internal concrete vibrator is a steel cylinder about the size of the handle of a baseball bat, with a hose or electrical cord attached to one end. The vibrator head is immersed in the wet concrete. External concrete vibrators attach, via a bracket or clamp system, to the concrete forms. There are a wide variety of external concrete vibrators available and some vibrator manufacturers have bracket or clamp systems designed to fit the major brands of concrete forms. External concrete vibrators are available in hydraulic, pneumatic or electric power.

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