Quote:
Originally Posted by aerohead
You may have already blown plastic before,but if not, we used to have a local skylight manufacturing plant in Denton with a clever (simple) process.
The plastic was clamped atop an airtight frame which defined the base perimeter.
After reaching 'sag' in an electric pizza oven it was sealed to the table top by quick-clamping air clamps.
A light source/photo-cell was set at the desired height of the bubble which would open-circuit the air tables supply valve.
As the bubble rose,when it reached the set elevation,the photo-cell cut the air.If the bubble 'sank',pressure was restored,and this process repeated until the plastic cooled enough to set.Really elegant engineering.  |
I have not blown any plastic, and the gent who is building the bike has plans for the windshield, but I think it will not be a compound curve. The upper structure will be aluminum sheet welded to the framework in the photos. He is a real artist and has followed my basic configuration. The vehicle is within a foot of the same length as the Fiesta. I told him Lowes has 3X6 sheets of .092 for just under $100 and he told me he can do much better than that through his race car connections and the lexan needs to be thicker than .092.
Thanks everyone for the positive support. Every time I think about it I get a little concerned about the money spent, then I go look at it and get charged up all over again.
regards
Mech