A single particle or particle color inconsistencies between individuals, commonly known as "flower material" this kind of situation is relatively common in the production of aquatic feed, mainly for the individual pellets from the ring die in color than the other normal particle color deep or shallow, surface color or a single particle are inconsistent, thus affecting the appearance of the whole batch of feed quality.
The reasons of this phenomenon are mainly in the following aspects:
1, because of the complex component of aquatic feed formula, raw material variety, some ingredients quantity is relatively small, in the mixture of raw materials, if the mixing effect of mixing machine is not ideal, it is difficult to ensure that raw material is mixed into the granulator is uniform, thereby the quenching and tempering and granulation process, common role in the water, temperature and pressure, raw material physical and chemical changes occur, resulting in material color change of different components are not consistent, produce "flower material", in this case in feed formulations containing change material color change of temperature and moisture sensitive when the comparison is more outstanding.
2, the raw material for the moisture content of granulation is inconsistent. In the process of aquatic feed production, often in order to make up for the loss of raw water after super fine crushing, to add a certain amount of water in the mixer, mixing before entering the conditioner for Quenched and tempered. Some feed manufacturers, technology is relatively simple, directly into a certain amount of water in a mixing machine, instead of using special nozzle spray, so it is difficult to feed in the mixed water can be evenly distributed. When the mixed raw material into the conditioner conditioning conditioner, because it is impossible in a short period of time so that the water further distribution, in the role of steam, feed in various parts after quenching and tempering curing effect is not consistent, after granulation color change is not consistent.
3, to be with the repeated granulation granulation chamber in the back of the machine. Pelletized granule materials after cooling and sieving can be finished material, fine powder or small particles of screening, often re entered the granulation process, usually into the mixing machine or be pelleting bin, because this is the material re conditioning and granulation, the modified if and other raw materials mixed unevenly or inclusions are back to the small particles, for some feed formulation, can sometimes have a "flower material".
4, diameter of die hole wall roughness is not consistent. Because the mould hole finish inconsistency by particles during extrusion resistance and the extrusion pressure is not the same, the color change is not consistent. In addition, some ring die with small hole on the wall has a burr, particles will scratch the surface in the extrusion, resulting in different surface color of single particle. For the four generation "listed above flower material" reasons, the improved measures have been very clear, mainly lies in the hybrid control of each component in the mixed formulation of the uniformity and the added moisture uniformity; improve the conditioning performance, control conditioning temperature when necessary, using quenched and tempered low temperature to reduce some of the color change; control back to the machine, for easy to produce the "flower" formula, as far as possible not to machine material direct granulation, should be put back to the machine and re mixing the raw materials after crushing; adopts the ring mold quality has safeguard, control die hole finish, when necessary to the die hole sanding after use.
In short, granule material for abnormal appearance in feed production, discussed above, seven kinds of representative forms, and exceptional appearance some particles due to not representative, not listed here are discussed. Discussion as can be seen from the above, the cause of these phenomena are in many aspects, each other is not completely isolated, which requires us to deal with such problems in the practical work, should add analysis, grasp the crux of the problem, it can solve the problem.
Henan Strongwin
feed machinery factory is a set research and development, manufacturing, sales and service in one,
specialized in feed machinery complete sets of engineering R & D and manufacturing, engineering design and installation, can be
customized according to user needs!
● All stainless steel door. Has a machine outside the body and nestingobservation window, easy to operate.