This criterion identification list is not exhaustive however it is definitely a good start if you are considering an internal rubber mixer purchase.

1. www.rubbermachineryworld.com Internal Mill Selection Questionnaire Page 1 of 1
INTERNAL MIXER SELECTION QUESTIONNAIRE
Criterion Please Answer as Descriptively as Possible
Production Requirement: ___________________ Tons/Hour ; ___________________ of 8 hour Shifts/Day
What is your compound
requirement? (Please tick)
 Single Stage Mixing  Double Stage Mixing  Others
If Others, please specify:
Type of Mixer: (Please tick)  Tangential (Banbury® Type)  Intermeshing (Intermix® Type)
Mixer Capacity: (Optional) ___________________ Liter
Rotor Type: (if Tangential)
 2-Wing  4-Wing (usually for >160 Liter Mixers Only)
 6-Wing (usually for >270 Liter Mixers Only)
Proposed for: (Please tick)
 Master Batch  Finals  Both  Others
If Others, please specify:
Rotor Speed for Mixing:
(RPM) (Please fill and tick) ___________________ RPM;  VFD Motor Required for variable speed
Hopper Preference  Pneumatic Ram  Hydraulic Ram
Gearbox (Please tick)
 Unidrive (Gearbox to have single input shaft/double output shaft)
 Semi Unidrive (Connecting Gear on Mixer)
If you have any Service Factor (SF) specifications, note here or discuss
with the manufacturer without fail.
Details on any major
components that are of
abrasive or heat
sensitive nature in your
recipe (Required for correct
material selection and wear
protection technology)
Any other inputs you
wish to share on your
need.
(For example, brands of electrical,
hydraulic components, or
lubrication requirements, etc -
Optional)