Kiln conveyors are specialised pieces of equipment which are used when objects are passed through a thermally insulated chamber at temperatures sufficient to complete processes , such as drying, hardening or chemical changes. They are commonly used for pottery and glass manufacturing.
Kiln Conveyors Can Also Be Called a Lehr!
The actual kiln itself can also be called a “lehr”. A kiln or lehr is a temperature controlled kiln which can be used for annealing glass. This is where glass or metal is heated and then allowed to cool slowly to toughen it.
For the manufacture of ceramics it is an essential part of the process as they require high temperatures to allow chemical and physical reactions to occur, so changing the physical state of the object.
Why is a Kiln Conveyor Needed?
If an object is cooled down too quickly then the temperature of the object can become uneven. This can result in cracking, before the object has cooled down, or even afterwards when it is being used.
On a kiln conveyor, the objects are carried from the cool entrance and slowly moved through the kiln. The temperature is increased steadily as it approaches the central, hottest area of the kiln and gradually cooled as it progresses to the exit.
How Do Kiln Conveyors Work?
The lehr is typically long in shape with a temperature gradient from end to end. The objects being manufactured, such as glasses or cookware are transported through the kiln on the conveyor.