Typical Mixing Element - Ningbo Jinyi Precision Machinery Co., Ltd.

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Typical Mixing Element

>>>>> Maddock Mixer:

It's a popular dispersive, but also a very pressure consuming mixer, what results in a lower throughput and higher energy consumption. In the case for PP, the melt quality can be improved by reducing the barrier clearance by welding some material on the screw. This modification seems to be quite stable and doesn't affect the pressure too much

>>>>>Egan Mixer:
This dispersive mixer does consume less pressure than the Maddock mixer. Therefore it is typically a better choice for PP

>>>>>Diamond Mixer (Pineapple Head Mixer):

The pineapple mixer provides mainly distributive mixing. This is obviously a very controversial topic with opponents and advocates.

Some machinery manufacturers have reported polymer degradation with the typical square type of mixing pins often used for the processing of HMWPE. Other issues reported were spiral defects in the bottle. Some others on the other hand are very positive about the use of this type of mixer for PP.

>>>>>Pin Mixer:

Mixing pins are typically placed in rows around the screw root. They tend to interrupt the laminar flow of the resin what causes mainly distributive mixing. In order to be efficient, the pins should be located in the metering section after most of the melting has taken place.

>>>>>Cavity Transfer Mixer

The cavity transfer mixer has semi-spherical cavities in the rotor & barrier housing. The combination of shearing & re-orientation appears to give good distributive mixing.

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