As a type of feed inflating machine, fish feed extruder, including single screw and double-screw type,
Screw food extruder machine is mainly designed for producing pellet for fish, shrimp, pets and other aquaculture. With higher feed conversion ratio, compound feed produced by single screw extruder machine can maintain high water quality of fishpond.
With simple structure, it is easy to operate. Before turning on the dry type fish feed extruder, users need to put feed raw materials into the machine through feeding device, , and the materials will be through hardening and tempering in the conditioner with high temperature and high pressure. With propulsion plant, materials will be sent to extruding chamber that consists of screw and chamber, and extruded and expanded under the action of extrusion, intense shearing, blending and friction. When pushed out from chamber, feed pellet's temperature and pressure become normal with surroundings, making the moisture of feed sharp vaporization, which makes feed porous and fluffy, commonly called puffing. Moreover, dry type machine also has different molds and cutting device for producing feed pellets with various diameter and length.
The structure of wet type is a bit complicated than the dry type. Except for control panel system, cutting motor, feeding advice, feeding motor, extruding chamber and main motor, the wet type also contains air outlet, conditioner motor and pre-conditioner. The most difference is that during production process, wet type is equipped with a boiler that needs to add water or steam into machine in order to promote water content to 20%-30% while pellet moisture produced by dry type ranges from 15%-20%. Meanwhile, bacteria and germ infections can be killed and cleaned under the action of high temperature and high pressure.
Currently, most equipment for feed extrusion are screw type, and for feed production, single screw fish feed extruder is primarily used. When choosing, users can refer to the following situations provided by FANWAY:
★ Users should make sure enough electric power supply if choosing equipment with high power consumption;
★ Choose dry type with cheaper price if no boiler;
★ Choose extruder with large draw ratio (the ratio between screw length and diameter) if processing feed;
★ Select according to daily requisite amount of feed.
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