Introduction: Nice Little Coffeemaker

For many years we made coffee extract with the old coffeemaker we inhereted from our parents. Everybody likes the coffee so much, but such pots are rare...so I designed a printable one. Open to everybody. Making good coffee extract without a machine, that's the promise!

Step 1: It Consists of Three Parts: Pot, Filter and Cover

Step 2: Here Are the STL - Files

Printed in PLA works well. You can also choose another food safe material such as PET. Preferably without possible toxic colorants.

If you can't print it yourself, well go to www.3dhubs.com and upload the stl - files. Then you get a list of printer hubs in your neighbourhood, with all prices. The hub of your choice is asked for consent. Once given you can pay to 3dhubs and your hub starts printing. After a few days you can make an appointment with the hub to collect your coffeemaker. If you are happy with it, 3dhubs pays the hub and you can give a review.

To get the pot watertight asks for a good print quality. It is important to print at slow speed (<30 mm/sec) and no fan the first 5 mm. and with a little overextrusion. Check the quality by filling half with water of 70 degree C and place the cover on the pot.

Step 3: How to Make Coffee? First a Bottomlayer

Make the bottom of the filter a little wet and put a coffeepad or a piece of filterpaper over the holes in the filter.That's better for your health and prevents grounds in your coffee extract.

Step 4: How to Make Coffee? Then the Ground Coffee

Fill the filter with standard ground coffee till the inner edge.

Step 5: How to Make Coffee? Three Times a Little Water

Put a little hot water over the coffee and let it swell. Do that two more times. So all coffee is wet and ready for the next step. Mindfull coffee!

Step 6: How to Make Coffee? Two Times Full of Water

Fill the whole filter with hot boiling water and place the cover. Wait till all water has gone through. Do it one more time.

Step 7: Coffee Is Ready to Pour Out

When all the water has gone through, place the cover on the pot and pour out. Some drinks it straight as a ristretto or espresso, but many likes it best with hot water and/or hot milk. The extract can also be used the next day or later when stored in the fridge. Preheating of the cup is advised. Enjoy your coffee!

Step 8: Some Remarks About the Temperature

The temperature is near the edge PLA can have. Placing the cover while pouring out the hot extract prevents the pot from distortion.

The ideal temperature of making coffee is about 94 degree C or 200 degree F. For excellent results the first waters (step 5) need to have this temperature. For Step 6 you use hotter water because the grounds had already a little cooled down.

The advantage of the new pot compared to the old one is that the warmth is contained better in the filter. And the holes don't get clogged. So we use now only this nice little coffeemaker! Sorry for the old one.

Comments

author
Ina Feitsma (author)2016-08-05

Very tastefull coffee indeed!!

It is handy to use, the coffee extract is enough for several times. The pot is easy to clean and the form is charming and looks nice in the kitchen.

A real topper!

author
DIY Hacks and How Tos (author)2016-06-14

Cool idea. How well does it hold up under heat?

author

Well, it does wonderfull. The ultime stresstest for the pot is filling it full with water of 100 degree C. Sure, the walls then become soft, but the pot keeps its form due to the shape that is like a large drop of water on a surface. In normal use there is not a single problem. The first time the bottom of the filter bends a little out, that is all.

author
adlaker (author)2016-07-05

In reply to the concerns about foodsafety. The good general rule to don't use 3d printed PLA for food has to deal with all kind of situations, meat, rotten food e.g. and with a good reason. For this project however, when only used for coffee, and using with the right temperatures I think the risks are not different from other normal situations. The inside of the filter reaches each time the pasteurisation temperature. Use another item to collect the extract if you are not sure about the pot. But we don't have seen any problem when used for months now.

author
FABLAB Dhahran (author)2016-06-20

Up to my knowledge, it is not safe to use 3D printed PLA (although food safe material) because of the printing process itself. Using it once or twice might be Okay but I wouldn't recommend reusing it as you would reuse a regular coffeemaker.

author
sk8r540 (author)2016-06-16

It's a wonderful idea, but the problem with 3D printing any food container lies with the fact that there are microscopic gaps in the layers that bacteria will get into and will grow, and there is actually no way to fully clean it out.

There is however a food safe epoxy, that you can use to coat the enitre piece and will make it perfectly foodsafe and allow you to clean it and won't allow bacteria to grow.

Unless this coating is added, food applications for 3D printed pieces are limited to 1 time use before the bacteria can set in.

author
DIY Hacks and How Tos (author)2016-06-14

Cool idea. How well does it hold up under heat?