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Tempering Furnace Maintenance on Key Parts (1)

Source: LandGlass  Attention: 2277  Published: 2015-06-20
Ceramic roller is one of the key parts in glass tempering furnaces. The quality of the roller and its installation directly affect the product outcome.

1、Regular Roller Cleaning

When the optical effect of the glass is less than desirable or there is a spontaneous explosion inside the furnace cavity, the tempering furnace should be turned off promptly.  Allow it to cool down before you start to clean the rollers. Follow the steps below: First, use scraper to scratch off the glass debris or other foreign objects off the ceramic roller.  Brush them off the track with soft plastic brush; Sand the rollers with 400 – 600 grit wet sandpaper until you get a smooth hand feeling on the ceramic surface. Vacuum the rollers and wipe them from the center to the ends with lint-free towels damped in soft water to remove the dust on the surface.  Ceramic rollers should not be over sanded to damage the enamel layer.  Use distilled water or pure water only.  Never use alkaline cleaning detergents or chemical agents. After the cleaning, close the furnace immediately to avoid more dust. After cleaning, heat up the furnace to 200 degree for 1~2 hours before raising the heating temperature.  Do not raise the temperature too fast.

2、Changing Ceramic Rollers
Do not change ceramic rollers until the furnace cavity is completely cooled down to prevent the metal end cap from coming apart. It takes at least three people to replace the rollers with one on each end and 1-2 handling the middle.  Remove the belt first.  Loosen the screws on the bearing spacing block and remove the bearings from the holder.  Insert a piece of thick cardboard in the holes of the pullout end.  Hold the roller firmly.  Lift and pull it out slowly to avoid bumping in or scratching. 

Insert a piece of cardboard in the bearing holes before installing the new roller.  Align the roller to the opening and slide it in with care.  The persons inside the chamber should help to ensure the inserting roller properly seated in the bearing.  Replace the bearing and the belt on the other end.  Manually check the smooth rotation of the roller.