Cool summer season: 3D printing a simple ice coffee making machine

For many coffee lovers, in the hot summer, a cup of cool ice coffee must have a flavor. Recently, San Francisco-based designer Jonathan Odom has developed a design with 3D printing that allows you to enjoy a wonderful iced coffee at home at a low cost. Even better, he shared his own design.

In real life, Jonathan is a designer at the Instructables design studio – he calls it the best job. Therefore, he often develops some cool and interesting (and sometimes even complex) projects, but this ice coffee maker should be fairly easy to build. As he said on the Instructables page, it essentially only requires some 3D prints, plus ready-made laboratory glassware and some maple poles. Sounds simple, isn't it?

In general, there are several ways to make iced coffee, and this machine is based on the cold bubble method. “Using this method, just immerse a small amount of coffee grounds in cold water and then drip the brewed coffee liquid at a rate of 3 seconds.” Jonathan explained that this is actually a way to improve the taste. “My experience is that boiling water releases caffeine and acidity significantly faster than cold water. Soaking the ground coffee in cold water and letting it slowly release helps to significantly reduce its sourness (you can taste this), and What I heard was because it soaked for so long (2-6 hours) that the caffeine content was about the same as that of hot coffee."

In any case, Jonathan was very satisfied with the ice coffee that was finally made and shared his design on Instructables. All STL files for 3D printed parts can be downloaded for free here (http://Coffee-Cold-Brewer/?ALLSTEPS). But you may also need to buy some parts, after all, the glassware in the lab is not available in everyone's home.

The design software used by Jonathan is Fusion 360. All the components are easy to print in 3D, which can be done by ordinary 3D printers. The whole process is very simple, although Jonathan also uses a sandblasting method to polish the surface, but this is not necessary. He also sprays the paint on the acrylic, which is also a personal preference.

The assembly itself is fairly straightforward, especially if you follow Jonathan's tutorial and there is nothing wrong with it. Please note that the key to the whole process is to create a siphon to ensure a stable drop. This problem is achieved by inserting a brass tube into the stop next to the valve. All other parts can be easily assembled, and some 3D printed parts need to be bonded with epoxy.

Once the manufacturing is complete, you will enter the most important step: brewing! In fact, the use of such a device is quite simple. Fill the upper flask with ice, face down, and slowly drip ice water. The funnel itself is covered with filter paper and filled with coffee (not too full). “Slow the coffee with cold water slowly. Slow is the key, because you don't want it to overflow. Put another piece of filter paper over the coffee. The purpose of this filter is to ensure that the water enters the coffee in a uniform way. Without it, the water droplets will slowly rush out of the hole in the middle of the coffee, so the taste of the coffee is very light," Jonathan suggested.

In this way, it takes about four hours to brew two cups of coffee (depending on the taste and release rate of caffeine), which sounds long, but it is a very worthwhile expectation for a real coffee lover. Ceremony. Try it out!

(Editor)

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