BodyPaint dryers by irradiation
| Paint dryers by irradiation |
| These are used mainly for small paint repairs. They require
little space and have low operational costs. They are called fixed
dryers. Presently dryers via infrared rays are predominantly used.
Great improvements are obtained in the paint drying process with them.
The infrared rays cross the air and the enamel layer, without direct
heating. The steel plate is heated and transmits the heat to the enamel
layer. |
Note | In order to dry the paint on high-resistance plates, by using
the infrared ray dryers, these may be taken to full power only slowly.
Otherwise excessively quick heating of the plates causes dilation
which later, after cooling down, causes undulations in the bonding
or spot-welding area. |
|
|
|
| Advantages of the infrared technique: |
| t
| The drying process occurs from the inside to the outside |
| t
| The flash-off time is shorter than with hot-air systems |
| t
| Quicker drying reduces the risk of dust deposition |
| t
| Efficient use of energy |
| The IV dryers are divided into three groups: |
| The most adequate ones for the drying process are the short-wave
and medium-wave dryers. |
| The short-wave appliances generate the irradiation through
quartz tubes. They irradiate in the field of vision and emit a red
or orange light. It reaches the working temperature in a few seconds.
These appliances have an intensive irradiation with a short flash-off
time. |
| The medium-wave dryers generate the rays by means of ceramic
tubes. They irradiate in the non-visual field. They only reach the
working temperature after a few minutes. Hence the flash-off times
are longer than those with short-wave dryers. |
| In principle, all materials can be dried with the infrared
drying technique. |
| The flash-off time of the infrared dryers, at a distance of
80 cm, comprises: |
| t
| Polyester scraper = 2 minutes |
| t
| Painting scraper = 2 - 7 minutes |
| t
| Soluble stuffing base in water = 7 - 9 minutes |
| t
| Covering painting = 7 - 10 minutes |
|
|
|
02 Body & interior
