• Innovation

  Are you struggling to find a good homogeniser or shear mixer? my research so far..

  Posted by VitalikButerin on March 6, 2019 at 1:55 pm

  So here’s my research so far… 

  the smaller the motor the more RPM (spins per minute).. 

  however, when analysing for large batches  an example is of a:
  Silverson GX20 Batch homogeniser, powered by a 15kw 2900 rpm motor.

  whereas a small lab homogeniser thats 0.75kw can run upto 8000 rpm

  Suitable liter batches (getting mixed) / Kw motor needed

  30-200 / 2.2
  80-500 / 3
  100-1000 / 5.5
  300-1500 / 11
  500-2000 / 15
  2000-5000 / 22
  4000-10000 / 37
  5000-15000 / 45

  so you’d buy the suitable motor, and of course you will need a homogeniser head - you will then need to connect the motor with the head using a ‘motor coupler’ - there are many youtube tutorials to this …

  1) the only thing thats missing from this research is how to control the motor’s RPM ? through one of these:

  https://uk.rs-online.com/web/p/products/8902765/?grossPrice=Y&cm_mmc=UK-PLA-DS3A-_-google-_-PLA_UK_EN_Power_Supplies_And_Transformers-_-Transformers%7CVariacs-_-PRODUCT_GROUP&matchtype=&pla-447107713647&s_kwcid=AL!7457!3!243856857071!!!g!447107713647!&gclid=EAIaIQobChMI2tydrdXt4AIVqLztCh0ZpQp5EAQYAyABEgLOy_D_BwE&gclsrc=aw.ds

  VitalikButerin replied 5 years, 9 months ago 2 Members · 4 Replies

  • machines
• 4 Replies

• 

  VitalikButerin

  Member

  March 6, 2019 at 2:44 pm

  If you are crafty enough you can buy a 

  https://www.manomano.co.uk/workshop-crane/2t-heavy-duty-hydraulic-folding-workshop-engine-crane-hoist-lift-stand-wheels-8058993?model_id=8058993

  and suit it to fit to your needs

  Only part left is the actual mixer head for a shear homogeniser - maybe can request from china through alibaba?

• 

  belassi

  Member

  March 6, 2019 at 4:32 pm

  If I were going to construct my own, I would for sure use a brushless DC motor because they can be accurately controlled from 1 RPM to the maximum. So, shortly, I envisage a horde of cosmetic chemists raiding electric car scrapyards for wheel motors and DC control blocks. 

• 

  VitalikButerin

  Member

  March 6, 2019 at 5:02 pm

  @Belassi  Brushless DC Motor? aren’t they very small and weak?

  also how is it on controls RPM speed? via voltage? 

• 

  VitalikButerin

  Member

  March 6, 2019 at 5:18 pm

  Hi guys,

  just found out that you need a VFD to change the speed of a motor..

  @Belassi
   you shouldn’t change the speed on a brushless motor, its not made for it! what are you getting people into 

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