Gallery, Projects and General > The Design Shop
3D Printed Quorn Tool & Cutter Grinder
Arbalist:
Joules, are you going to make the plastic parts the same size as the cast iron ones would be or are you going to make them larger wherever possible? I see no advantage to copy the CI parts verbatim unless you want the finished product to look identical?
Joules:
Cheers guys, your input is very welcome. Arbalist I am treating the casting like a listed monument, alterations and extensions will be in keeping with the sytle of building. No I am heavily modifying the parts to make best use of my 3D printing knowledge and experience. The devil is truly in the detail, at present I have no idea how long just preparing the CAD models will take. You can't just tap plastic and expect fasteners to behave as though in metal, so in places inserts and buttons must be incorporated into the print, but nothing too complex.
Joules:
This is the altered casting parts. I moved the fixing points and doubled them to make the column more rigid, this also impacted on the blending of the two parts, so I had to alter that. I am also missing some of the chamfering I will add for the weld fillets. The original CAD model I got is pretty awful for 3D printing as it isn't watertight and has many overlapping and twisted surfaces, so I am pretty much having to redraw each part from scratch for 3D print ready parts. What I learn here will be applied to other jobs and projects so none of it is a waste of time.
So far the wall thickness is around 7mm, which for PLA has huge strength if you print in the 40-50% infill range. The vertical column will also be drilled and tapped in the base, so allowing it to be bolted to the mounting board/plate.
mattinker:
Joules,
what are you planning to mount your plastic Quorn on? A piece of granite counter top and bolts compressing the plastic could help enormously with rigidity!
Regards, Matthew
Joules:
Matt, bolting is going to be a contentious issue as PLA will creep if put under too much stress for too long (lesson learned from printed violin) So it maybe something like cycle quick release system so its only firmly clamped during use. Experimentation will be fun :scratch:
Another option is to sleeve the bolts so creep can be limited then skim the sleeves if needed later on.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version