3D printer cup


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PLA ​​mug and boiling water.

3D printing

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I once had a crazy idea to make a mug out of PLA plastic that wouldn't bend and hold hot coffee or tea. Earlier I saw a post about a pla cup and how it bends and softens when boiling water is in it. Based on what he saw, he decided to model a thick mug in the style of a thermos, i.e. 2 walls, and air between them, with the expectation that, apart from hot liquid, nothing will press on the inner walls, and since air prevails between the inner and outer walls, the outer walls will not heat up enough to wrinkle in the hands. So, for starters, a thermos mug was modeled, if you can call it that.

It consists of 2 parts, the thermos itself and the lid-mug, they are threaded and twisted. I modeled in a self-cad, it turned out pretty quickly and simply. Then I printed the lid on creatbot mini, natural pla plastic bestfilament (I considered the absence of dyes in plastic important), cura slicer.

print specifications:

0.4mm nozzle

0.2mm layer

1.6mm wall thickness

20% coverage

after 16 hours of printing, in other words the next day, I decided to immediately test the cap and poured into it boiling water. The result is as follows: the outer walls warmed up after 10 minutes, but not enough to be soft, the bottom warmed up faster and became a little soft, after which the boiling water cooled down.

then it turned out that I made a mistake with the thread and I had to print the cover of the mug again.

This is where the adventure began, or the problem was in the printer or in the plastic, or both, I didn’t fully figure it out, the plastic choked during printing very badly.

Perhaps because it is already old, and there was a problem of fluid leaks - cracks between the layers and fill lines. The solution was to dry out the coil and ream some of the Teflon tubing in the hot end. after which there was a small problem, in some places the distance between the lines in the horizontal plane, namely at the bottom is too large, as a result of which the bottom leaks. With the help of coffee, it was possible to find and show leaks

Here I got into the self-slicer, I remember exactly there is an opportunity to reduce the distance. (top/bottom line width)

After which the thermos was printed, the thread had to be worked out a little about 10 minutes of work with a file, and here it is the result.

well, a few links, suddenly someone will come in handy on Thingiverse - http://www.thingiverse.com/thing:2275179

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3D printing of a cup! Design Studio -Nervous System!

3D Printed Porcelain Cup

Nervous System design studio is well known for its amazing designs for a wide variety of purposes. A distinctive feature of most of them is the use of a 3D printer as a working tool, which works according to a 3D printing technique suitable for each specific situation, and, of course, close integration with 3D technologies. Nervous System's work includes both individual projects and larger commissions, some of which have received quite a lot of publicity. For example, for a long time, the design studio worked on the creation of 3D-printed sneakers in collaboration with New Balance.


And the adorable 3D printed and 3D scanned dress debuted in March this year. In addition to these projects, the company has quite a few not less remarkable developments, such as various 3D printed accessories and decorative elements. This time Nervous System surprised us with the results of their experiments with a new 3D printing material called Porcelite from Tethon. Jessica Rosenkrantz, one of the founders of the design studio, described the problems that the developers had to face while working on the project, as well as the process of finding solutions to them.

How the cup was 3D printed

According to the designers, they became interested in the possibilities of Porcelite material immediately after its announcement on the Kickstarter crowdfunding site in February. With this ceramic mixture, the founders of Nervous System set out to create a set of porcelain cups that reflect the studio's creative choices. The design of the dishes was inspired by cellular structures, and the design of the products took into account the need for thermal insulation, in which the outer part of the cup remains cold, despite the high temperature of its contents.


This effect was achieved due to the construction with double walls, the air gap between which is responsible for the conservation and distribution of heat. “We planned to explore ceramic structures that require 3D printing technology. Products that are almost impossible to create using traditional manufacturing techniques, even by hand. We were also hooked on the double-walled idea, which we managed to beat in the end. The created set should not be exclusively of aesthetic value, but should also correspond to a given functional load,” says Rosencrantz.

3D printed cups on SLA 3D printer

Since it was the first time the designers worked with Porcelite, it took them about a month to perfect the pieces. The main feature was the fact that this material is one of the few, if not the only, ceramic materials designed to work with SLA 3D printers. This circumstance can be safely called an advantage, since SLA technology allows for ultra-precise 3D printing with a high degree of detail, which provides creators with complete freedom in product design.


The developers used a Form 2 3D printer from Formlabs during the printing process, which had to be tormented with setting up for proper 3D printing with a new material. The first question that came up was the tendency of the substance to separate: Porcelite consists of two materials - a photopolymer and a ceramic powder, which quickly begin to separate from each other if not used at a particular moment. This problem was solved empirically due to the presence of an open printing mode in the 3D printer. This allows you to manually add the required amount of material to an empty cartridge. There was also the issue of adhesion, which the designers managed to get around by grinding the work surface.

Consumables

The original weight of Porcelite is significantly higher than the weight of the resins that the Form 2 is designed for, so the inclusion of supports in the structure was a must. However, as with standard materials, they were easy to remove once the 3D printing was complete. The main difficulty, familiar to every ceramic artist, was the process of firing finished products. Any ceramic mixture shrinks during drying and firing, on average about 12%. Porcelite was no exception, but it turned out that this material compresses even more - the shrinkage of the cups was 17.5%, which also presented some difficulties. Thanks to the preliminary irradiation of products in a UV oven for two hours, it was possible to avoid such unpleasant consequences of firing, such as cracking and deformation.


Still, there were some inaccuracies in the finished products. However, after applying several layers of glaze to the surface of the products, these shortcomings became almost invisible to the naked eye.


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