Coffee Grinder capsule cutter

Coffee Grinder capsule cutter

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Coffee Grinder
Coffee Grinder
Designer
9.1 h
5 plates

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Description

In countries like mine, where separate waste collection is mandatory, used coffee capsules cannot be disposed of as they are but must at least be emptied by separating the powder from the casing.

The Nescafé Dolce Gusto capsules remain sealed even after use and to remove the powder the simplest way is to cut them with a knife, but this is not a very safe system. I have designed various tools to open the capsules, improving them each time until arriving at what I believe to be the least dangerous system: the one which does not allow any contact between the blade and the human during use.

This model is made like a small coffee grinder and when cutting the capsule it is impossible to touch the blades.

 

Drawer assembly

  1. Mount the front panel on the capsule holder body (glue it if necessary);
  2. Insert the hook into the slot;
  3. Insert the knob all the way into the hole, aligning the rectangular notch of the hook with that of the knob;
  4. Make sure that the knob rotates freely, if not, check the alignment of the hole between the front panel and the capsule holder.

Body hinge assembly

 

For aesthetic reasons I did not use the usual hinges with the central pin (I should have placed them on the outside), but I used a sliding system that can be positioned hidden inside the grinder.

  1. Assemble one of the two semicircular guides (red on the figure) on the side of the lower body, fitting it into the appropriate slots (glue it if necessary);
  2. Place the upper body in the open position by inserting the sliding element into the slot of the guide you have just mounted;
  3. Assemble the second semicircle guide on the other side of the lower body in the same way as the previous one.

Crank assembling

  1. Insert the knob into the hole in the crank;
  2. Lock the knob by inserting the appropriate pin underneath.

Mounting crank in the body

  1. Insert the upper thread of the body from underneath, matching the notches with the slots;
  2. Place the dome from above, fitting it into the thread just inserted;
  3. Screw the rotating knob clockwise.

Blade group assembly

 

First, separate four segments with a 9mm cutter blade: these will be the blades that will cut the capsule. Be extremely careful when carrying out this and the following operations, because there is a risk of cutting yourself. Use protective gloves.

 

  1. Using tweezers, place the blades into the slots on the circular body as in figure 1 (do not do this with your bare hands, these blades are very sharp). The tip of the blades must protrude by approximately 4 millimetres;
  2. Position the four semicircles as in figure 2 so as to lock the blades in their seat;
  3. Insert the central element which will block the entire blade assembly. To do this you will need to use a bit of force, help yourself by tapping it with a small hammer or a piece of wood. Do not press it with bare hands as there is a risk of injury from the blades.

Assembling the blade group in the crank

 

Keeping the grinder lid open, insert the blade unit all the way into the appropriate hole on the crank thread (in collar if necessary).
Be extremely careful when carrying out this operation because there is a risk of cutting yourself with the blades. Use protective gloves and carry out the operation using a pair of pliers or any other tool that avoids contact of the blades with your body.

Your capsule cutting coffee grinder is ready!

 

How does it work?
1. Make sure the blades are fully raised. If they are not, turn the crank counterclockwise until it locks;

2. Place the capsule to be cut in the appropriate space in the drawer;
3. Insert the drawer into the base (be careful not to hurt yourself with the blades);
4. Close the grinder and lock it by turning the drawer knob 90° anti-clockwise;
5. Turn the crank clockwise until you hear the sound of the plastic being cut. If you have any doubts, rotate it until it stops (this means that the blades have reached the bottom of the capsule);
6. Turn the crank counterclockwise until it locks to raise the blades;
7. Unlock the grinder by turning the drawer knob 90° clockwise;
8. Open the grinder, remove the drawer and recycle the capsule by separating it from the coffee powder.

When you have finished, reinsert the drawer, close the grinder and lock it with the drawer knob before putting it away, to avoid touching the blades the next time you take it.
Everything can be rinsed off with tap water. If you want to wash the grinder in the dishwasher, make sure you have printed it with a material resistant to high temperatures!

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