I have seen the technology for liquid detergent Auto - Dispensing in washing machines where we load the detergent at one go only and the machine automatically dispenses it according to its need for different load cycles. Now I want a concept and mechanism for the same thing for powdered detergents wherein we load like 1 kg of detergent in the machine and it automatically takes it and uses it acccording to the load. I need help for this concept can someone advice me with how can I do it

Guys please provide any/smallest of ideas you have as it is only in the concept building phase anything can be of help for me

  • $\begingroup$ Have you considered it might be easier to control liquid cf powder? $\endgroup$
    – Solar Mike
    Feb 27 at 8:19
  • $\begingroup$ I know that it is easier to control liquid compared to powder but I just want a concept and technique as to how this can be done with the powder. might be of some help in areas where people use powders more than liquid detergents $\endgroup$ Feb 27 at 8:25
  • $\begingroup$ So how do food processing companies control powder? What methods have you researched so far? That way we won't duplicate things and get told you have already considered / discarded that... $\endgroup$
    – Solar Mike
    Feb 27 at 10:36
  • $\begingroup$ So I saw the mechanism of a coffee vending machine as a possibility - like the coffee powder is dispensed by mixing it with water - the same way we can do it with powdered detergent $\endgroup$ Feb 27 at 11:02
  • $\begingroup$ So controlling a liquid instead of a powder - back to my first comment then. $\endgroup$
    – Solar Mike
    Feb 27 at 11:04

1 Answer 1


Industrial applications use augers to feed powder.

enter image description here

Figure 1. An auger system. Image source: Parker Ionics.

In your case you just need the powder hopper and screw.

You could experiment using a horizontally oriented drill bit (say 6 - 8 mm?) in a snug-fitting tube or block. Powder could be feed through a hole in the top side of the tube / block at the end of the drill helix and outlet would be near the tip. Run the drill anti-clockwise for powder feed.


  • This arrangement could be driven by a stepper motor to ensure repeatable dosing.
  • You may need to consider mounting both ends of the drill bit in bearings to ensure that the drill doesn't gouge out material from the tube / block and add an unexpected ingredient to the washing machine.
  • You need to prevent water vapour getting into the feed screw when not dispensing. This is another design challenge as it needs to have free fall-through for dispensing and by quite air-tight otherwise. A butterfly valve might be best. (On the other hand, you might find that dispensing into the machine's powder dispenser is far enough away from the washing drum that humidity isn't a problem in there.)
  • You could 3D print an auger.

Other material:

enter image description here

Figure 2. An auger made from washers.


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