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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hi all.
At about 1am I had an interesting idea which I will detail below.
Polymorph is a highly mouldable, low temperature copolymer which is able to be extruded, formed and otherwise manipulated into a given structure at above 60 Celsius.
Howwever, unfortunately it is too expensive to be used to make bulk structures. So I came up with a way to "print" it into lattices using a standard X-Y heated nozzle printer which "extrudes" the melted polymer as it goes.
Then, once cooled pre-mixed epoxy resin (the cheapest obtainable) is dripped according to a pre-determined pattern and allowed to dry, and the next layer(s) are deposited.
The epoxy mixing would seem to be the trickiest part of the whole process, but I've anticipated this and determined that using the dual syringe dispenser with a worm gear based plunger would solve the dispensing problem, dripping the unmixed epoxy into a metallic pre-heated rectangular nozzle plate and stirring with a plastic stirrer mounted on a retractable arm would get around this problem. Heating makes the epoxy mix more thoroughly and also allows it to flow as a liquid until it contacts the printing surface by gravity.
Droplet counting would be done by monitoring using infra-red beam break, and this feeds back to the logic system to move to the next coordinate set, with verification by laser absormetry.
Is this even feasible? the basic idea is to use a lattice size which combined with the epoxy's surface tension allows the structure to be stable and void-free.
Registered Member #1320
Joined: Sat Feb 16 2008, 01:31AM
Location:
Posts: 67
What's the advantage of this as opposed to other 3d printers. I have used the zprinter before which uses basically layers of powder and glue. There is also the Pjet which which uses a similar technique that your thinking about using except with UV cured resin. Here's the results I got from the zprinter
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Polymorph and epoxy rapid prototyping?
