Puffed fish feed and production method thereof

Abstract

The invention belongs to the technical field of fish feed production, and particularly relates to puffed fish feed and a production method thereof. According to the present invention, the soybean meal powder, the peanut meal powder and the cottonseed meal powder with suitable particle sizes are used, such that the complete puffing degree of the fish feed components is ensured. The invention further provides a rotary discharging type pulverizer which structurally comprises a vertical barrel unit, a pulverizing cutter unit, a slotting bottom plate unit, a radial plate unit, a positioning pipe unit and a reset elastic column unit and has the advantage of being high in overall efficiency of pulverizing operation. The invention has the following advantages: firstly, the soybean meal, the peanut meal and the cottonseed meal respectively have rich nutrient substances and proper particle sizes, the puffing operation is more sufficient, and the crushing workload is reduced as much as possible on the premise of ensuring the puffing effect; and secondly, the bottom plate is high in stability and not easy to turn over accidentally during crushing of the rotary discharging type crusher, and the bottom plate can controllably rotate during discharging, so that higher discharging speed is ensured.

Description

technical field [0001] The invention belongs to the technical field of fish feed production, and in particular relates to an extruded fish feed and a production method thereof. Background technique [0002] Extruded fish feed refers to a relatively special fish feed pellet. In the production process, an extruder is needed to obtain expanded and porous fish feed pellets through high temperature and high pressure. Compared with ordinary fish feed, extruded fish feed has many advantages such as easy absorption of nutrients, good floating performance, less pathogens in the feed, and easy storage of the feed itself. [0003] For example, the Chinese invention patent with the patent publication number CN 113475646A and the publication date of 2021.10.08 discloses a freshwater fish extruded feed and its preparation process. The raw material components and weight percentages of the compound feed are as follows: Imported fish meal 25-37%; puffed soybean 12-15%; peanut meal 10-15%; p...

AI Technical Summary

Problems solved by technology

[0007] The soybean meal crushing and pressing device in this utility model patent has basic crushing and discharging functions, but in the actual use process, it is found that there are still at least the following inefficiencies and inconveniences:

[0008] First, the discharge speed is slow, and the discharge port is too small, which eventually leads to the reduction of the overall crushing effect;

[0009] Second, it is necessary to configure multiple levers for cleaning and pushing down materials, which greatly increases the complexity of the equipment;

[0010] Third, the lever occupies the position of the original crushing knife, which reduces the crushing efficiency

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