Batch Furnaces

An insulated, chamber for placing the job, the heating system and a door or several doors for placing the job in place are the requirement of these furnaces. The parts to be heat treated are loaded and unloaded in individual batches. A furnace which is easy to use, simple to construct in several sizes and having versatility to accommodate several size is a box furnace which could be horizontal rectangular. Many times a flat platform on wheels is used to carry the parts in the furnace.

A pit furnace is made in form of a vertical pit below the ground level. The parts to be treated are lowered in the pit. Long parts like rods, bars, tuning, shafts, etc. can be suspended in the space of the pit furnace. These parts are susceptible to distortion if placed in horizontal position in the box furnace.

A bell furnace does not have bottom and is lowered on the stack of parts to be treated. The furnace chamber could be round or rectangular.

In elevator furnace the parts to be treated are placed on the rolling platform which is rolled in the proper position and lifted to the heating chamber of the furnace. By placing a quenching tank directly below the surface the savings on space and quenching time are made.