Combined de-airing extrusion machin

In his Types of extrusion units , Willy Bender investigates all the various kinds of extruders and combined de-airing extrusion machines. 

The type of combined de-airing extrusion machine can be defined by, amongst other aspects, the configuration of the auger and mixer shafts, by the method of coimection between the extruder and de-airing mixer, as well as by the construction of the de-airing mixer. One differentiates the features accordingly, as shown below ... 

The compact de-airing extrusion unit is only available in a longitudinal arrangement it has lost much of its importance in relation to the combined de-airing extrusion machine. 

Any combined de-airing extrusion machine consists of an extruder and a primary pug sealer, of which several versions do exist, and therefore the following combinations are possible ... 

Final observation. Only the most important and commonly used types of extruders and combined de-airing extrusion machines have been listed in this contribution. Bearing in mind the vast variety of options available on the market, there is no pretence to completeness. Especially prototype... 

Fig. 47 Combined de-airing extrusion machine comprising of vacuum doubleshaft mixer and auger extruder, 1937...

Quite a few experts entertain fairly vague notions about how much vacuum a combined de-airing extrusion machine can achieve as a function of ... 

Basically there are two options for connection of the machines that form the combined de-airing extrusion unit ... 

Extruder and de-airing single shaft mixer. This machine combination is the superior choice for stiff extrusion purposes in the heavy clay industry. One of the reasons for this is the fact that a stiff body could cause warping of the mixer shaft, which could prove to be problematic with a double shaft mixer. 

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