Problems in selection of extruder

When building a new aquatic feed processing plant or transforming a raw feed production line, the type of extruder must first be considered when selecting an extruder, and the matching extruder should be selected according to the feed production capacity; especially when the old factory is renovated, the original crusher should also be considered. , Whether the production capacity of dryers and coolers is sufficient. Several issues should be considered when selecting.

1. The puffing effect of the puffing machine

For aquatic feeds, the good expansion effect is that the particle forming rate is more than 99%, the particle powdering rate is less than 1%, the particle floating rate (sinking rate) is 100%, the particle size is uniform, the color is consistent, and it has good water resistance. ; Floating aquatic feeds are kept in water for 10 hours, sinking aquatic feeds are kept in water for 3 hours without collapsing, etc.

2. Investment price of extrusion press

The equipment investment cost of a twin-screw extruder is 1.5 to 1.7 times that of a single-screw extruder with the same production capacity; the cost of wearing parts is about 1.5 times that of a single-screw extruder; and the power consumption cost is about single-screw extruder. 1.5 times of screw extruder.

3. The service life of the extruder

Extrusion machines from different manufacturers have different service life due to different structural features and materials used. Therefore, when selecting an extruder, special attention should be paid to the wear resistance of some vulnerable parts, and whether its structural design is reasonable, and whether it can achieve the purpose of reducing screw wear; in addition, when selecting an extruder Consider whether the machine can really achieve the purpose of energy saving and consumption reduction. For the raw materials that have not been superfine powder, the wear of the vulnerable parts will be more serious, especially the twin-screw extruder. In this case, it is more reasonable to use the single-screw extruder.

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