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Re-reflective heating method – 5. Dome heating

A dome cover is used when heating a relatively wide area or heating a plate-like material uniformly.
If the dome cover needs to be durable, our condense mirrors can also be used as a dome cover.

Re-reflective heating method - 5. Dome heating

Re-reflective heating method - 5. Dome heating

The light energy emitted from the irradiation hole is irradiated to the object to be heated and a part is absorbed.
Generally, highly reflective materials reflect light energy and do not get hot.
In the case of dome heating, the reflected light energy internally re-reheats repeatedly at the speed of light speed.
Infrared energy is absorbed almost by repeated re-reflection heating.

Due to the repeated irregular reflections, the interior is heated fairly high temperature.
Finally, even if the infrared absorption rate of the object to be heated is low, good heating can be achieved.

When an inert gas is filled in the dome, it i’s possible to do non-oxidation heating.

This heating method is particularly effective for transfer equipment that operates intermittently, such as index rotary tables.

Re-reflective heating method - 5. Dome heating

Preventing adverse effects of updraft

In open heating, the air around the object to be heated is also heated and thermally expanded and lightened, so an updraft is generated.
Air at normal temperature and normal pressure flows into the space that has become lean and low pressure due to the updraft.
This inflowing air is not good for heating work because it contacts and cools the heating object.
Dome heating does not generate a flow of cooling air, creating an effective heating environment.


Comparison of open heating and dome heating using condense mirrors


Re-reflective heating method - 5. Dome heating

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