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| Title: | Polycarb dome | |
| Posted on: | 4/24/2012 12:38:56 AM | |
| Category | General dome conversation | |
| Author | romski | |
| Status | Open | |
| Views | 5323 | |
| Replies | (10) | |
| Dome from twin wall polycarb Hi guys, After watching this site grow over the years and making many models I have finally made a grown up one. Its 4m in dia and constructed from standard 10mm twin wall polycarb thats been glued together. Thanks for a great site as its enthused me into making rather than just being a watcher. Dome pix Rom | |
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| [ Comments 10 ] |
| posted by Hendro Setyanto | 21/09/2012 08:35:58 |
| Hi All, I would like to make dome for an astronomical observatory. The dome have to able to rotate 360 degre and have a slit for observing to the sky. I will use aluminium Carbonate for the dome. Any one can help me for design? Thank you | |
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| posted by dean | 30/09/2012 09:00:14 |
| can you upload some photos of how you attached the polycarb? | |
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| posted by romski | 05/10/2012 00:01:38 |
| I did not attach it to anything. Its a stressed skin design. The edges are held in place with H section plastic extrusions. A polymer adhesive is used to hold each edge in place. Its been running a few months now and seems to work well. In places I did not seal the cavity adequately so have some condensation. Otherwise all is good, its really solid for 10mm thick material. | |
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| posted by romski | 05/10/2012 00:18:56 |
This may help
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| posted by romski | 05/10/2012 00:23:53 |
This was the top section which slotted straight on top.
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| posted by romski | 05/10/2012 09:06:09 |
| To my knowledge this method has not been done before and it was not until the day of erection that I knew it would work. I had built many prototypes and spent two winters and summers testing the adhesives. You can see that the segments are held in place with spacers and its all a bit wobbly until the last bit gets put in - then it suddenly locks up solid. | |
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| posted by romski | 01/12/2012 16:21:30 |
I was on holiday when the big winds came last week. Happy to say that the tree went the right way. Happy that the dome is still here.
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| posted by cls46903 | 18/06/2013 20:11:10 |
| question could you make slots inside the triangle pieces then use some sealant on both sides | |
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| posted by Von | 12/12/2013 20:42:30 |
| That looks really good. Luck was on your side with that tree! How is the dome holding up now we're into winter? May I ask what glue you decided was best for outside as I've a polycarbonate Florabest coldframe that needs a bit of glue where the original has perished. | |
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| posted by romski | 28/01/2014 09:39:48 |
| The neighbours shed was trashed in the 60 mph winds we had. The dome stood strong. The adhesive used was Stixall from Tool Station. I have tried many adhesives in prototypes and StixAll has proven to be the best. Silicone did not hold well to thye Polycarb. I cleaned with a Acetone based cleaner - this also etched the surface in prep. | |
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