That time of the year for a new VAT again.
After some calculations a few posts back I realized I will have to add resin midway if I print a larger object, hence the current post and need for a bigger VAT.
If you need to print a smaller item, the VAT may prove too big, but you can always drop a block of 70mm x 90mm x 10mm glass and use less resin.
This time it is all glass with a bit of 100% silicone.
1- 200mm x 150mm 5mm soda lime glass ( regular window ).
2- 200mm x 20mm x5mm of the above.
2-100mm x 20mm x5mm of the above above.
Mark the location of the walls lightly with permanent marker.
Spread some silicone on the bottom edge and the side edges and repeat on all 4 sides.
Use some tape to hold the glass in place after you glue it. Leave it undisturbed at least overnight.
I slid out the glass window, but left the aluminum rails and inserted the new VAT and tightened the grub screws.
It never is final – Everything.
OK this post is the culmination of previous posts.
It is about the Silicone VAT. A continuation of : http://3dlprint.com/2011/11/silicone-time-capsule/ and the walls from http://3dlprint.com/2011/10/vat-100-silicone-dam-wall/
Once I have the Silicone walls and a coated Glass it is time to spread some silicone on the bottom of the walls and stick them together.
That’s it! nothing more fancy. Just place another glass on top until dry and seal the gaps in the corners.
Two weeks ago I took a 5mm soda-lime glass piece and spread some aquarium 100% silicone sealant on it.
2 pieces – 5mm 150mmx150mm ordinary glass
2 pieces – 10mm 110mmx70mm ordinary glass
1 tube of 100% Aquarium silicone.
1 piece of heat shrink wrap large enough to cover 150mmx150mm and have a margin of about 3cm on all sides.
Spread silicone and cover with shrink wrap place the other 150mmx150mm glass on top and use the 10mm to spread the load and clamp.
If you get bubbles peel and start again. Detailed instructions available at the ChemShapes site HERE
Leave untouched for 2 weeks.
Today – Carefully removed the 10mm glass and clamps. Clamped on one of the 10mm pieces for a few hours to make sure silicone has cured – only to check.
Guess not. But a few hours later I managed to peel off the shrink wrap from the silicone and left it to set.
Some things take time, so prepare and experiment early on to be able to have something useful at the right time.