Dryers for annealing plastic lamps after welding so as to eliminate stress
It was critical for the customer that we minimise dust levels within the furnace. To do so, we had to avoid exposed insulation. Everything had to be encased in sheet metal or special silicone-free insulation. Another requirement was to maintain a precise temperature distribution within the furnace, which we monitored right by the parts. Since this was a continuous furnace, we measured the temperature distribution using contactless sensors. Using an air circulation system, we achieved the required value of ± 3 °C.
For the annealing of the plastics to eliminate stress after welding, we manufactured two chamber dryers with a vertical chain conveyor and one with a horizontal chain conveyor. The vertical chain conveyor minimises space requirements. The multi-zone forced air circulation system, meanwhile, ensures perfect temperature distribution right by the charge.
The lamps are painted after heat treatment. They must be dust-free for painting, and so the furnace’s entry and exit connect to a super-clean space so as to meet production requirements. The furnace’s internal space is likewise structurally designed to minimise dust levels.
What’s great about this facility
- minimal dust levels
- a chain conveyor for maximum utilisation of the built-up space
- multi-zone circulation for a superb temperature distribution of ± 3 °C