A method for spraying oil on the surface of expanded aquatic feed and a spraying assembly thereof

Abstract

The application discloses a kind of oil surface spraying method and its spraying assembly of puffed aquatic feed, the spraying method includes the following steps: step S1, the side of extruded puffed strip is dried;Step S2, the side of extruded puffed strip is sprayed with oil;Step S3, puffed strip is cut off;Step S4, the end face of puffed strip cut-off is dried, then the end face is sprayed with oil;Step S5, the puffed pellet that side and two end faces are sprayed is finished, the oil surface spraying method of puffed aquatic feed in the application is sprayed with oil on the side before feed puffed strip is cut off, after feed puffed strip is cut off, end face is sprayed with oil, ensure that each puffed pellet surface oil is sprayed in place, processing efficiency is high, and the oil surface spraying assembly of puffed aquatic feed is used to realize the above-mentioned spraying method.

Description

Technical Field

[0001] This invention relates to the field of feed processing technology, and in particular to a method for spraying oil onto the surface of extruded aquatic feed and a spraying assembly thereof. Background Technology

[0002] Extruded feed refers to a new type of feed formed by physically modifying the original feed ingredients through specific high-temperature and high-pressure processes (such as wet or dry extrusion). In this process, the starch inside the feed ingredients gelatinizes, the protein denatures, and the fiber softens, while many microporous structures are formed, which increases the volume of the feed, makes it looser in texture, and improves its palatability.

[0003] Aquatic feed requires the addition of many important heat-sensitive nutrients, such as vitamins and enzymes. These components are significantly damaged during the formulation and pelleting processes. Therefore, oil spraying after feed extrusion, drying, and cooling can reduce nutrient loss. Current vacuum spraying technology requires transferring the extruded feed to a dryer for drying and cooling before entering the vacuum spraying machine. This cumbersome process leads to low processing efficiency. Furthermore, current vacuum spraying technology sprays multiple feed pellets simultaneously, which can easily lead to pellet accumulation and obstruction, affecting the uniformity and effectiveness of the spraying. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of low vacuum spraying efficiency and uneven spraying caused by multi-particle spraying in the prior art of aquatic feed. The invention proposes a method for spraying the oil surface of extruded aquatic feed and its spraying components, which spray the extruded material on the side and end faces respectively to ensure the effectiveness and uniformity of feed particle spraying.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for spraying oil onto the surface of extruded aquatic feed includes the following steps:

[0007] Step S1: Dry the sides of the extruded puffed material strip;

[0008] Step S2: Apply grease to the sides of the extruded puffed material strip;

[0009] Step S3: Cut the expanded material strips;

[0010] Step S4: Dry the end face of the cut part of the expanded material strip, and then spray the end face with grease;

[0011] Step S5: Obtain expanded granules with the sides and two end faces sprayed.

[0012] The oil coating method of this extruded aquatic feed involves spraying oil on the sides before cutting the extruded feed strips and spraying oil on the ends after cutting the extruded feed strips, which can ensure that the oil is sprayed on each surface of the extruded pellets.

[0013] This invention also proposes a spraying assembly for the above-mentioned method of spraying oil on the surface of extruded aquatic feed. The spraying assembly includes a spraying box for spraying oil and a negative pressure box for creating negative pressure inside the spraying box. The spraying box is wrapped around the outside of the discharge mold of the extrusion cylinder. Inside the spraying box, on the side of the discharge end of the discharge mold, a drying isolation plate, a spraying isolation plate, and a discharge plate are arranged sequentially from near to far. The drying isolation plate, the spraying isolation plate, and the discharge plate are parallel to the discharge plate surface of the discharge mold where the extruded material holes are opened. The drying isolation plate, the spraying isolation plate, and the discharge plate are respectively provided with extruded material strip flow holes corresponding to the position and appropriate amount of the extruded material holes.

[0014] The sides of the aforementioned drying isolation plate, spraying isolation plate, and discharge plate are slidably and sealed to the inner wall of the spraying box. The spraying box wall is provided with a side drying air inlet pipe for drying the side of the expanded material strip, a side spray nozzle for grease spraying the side of the expanded material strip, an end drying air inlet pipe for drying the end face of the expanded material strip, and an end spray nozzle for grease spraying the end face of the expanded material strip.

[0015] The spray box is also equipped with a cutting blade for cutting the expanded material strips.

[0016] A side drying space is formed between the discharge plate of the discharge mold and the drying isolation plate; a side spraying space is formed between the drying isolation plate and the spraying isolation plate; and an end-face treatment space is formed between the spraying isolation plate and the discharge plate. The side drying air inlet pipe is connected to the side drying space, the side spray nozzle is connected to the side spraying space, and the end-face drying air inlet pipe and the end-face spray nozzle are respectively connected to the end-face treatment space. The cutting action of the cutting blade is performed in the end-face treatment space.

[0017] When feed puffing begins, the discharge plate, drying isolation plate, spraying isolation plate and discharge plate of the discharge mold are sequentially attached to each other. The puffed material flow holes on the drying isolation plate, spraying isolation plate and discharge plate are connected to the puffed material holes of the discharge mold, and the original puffed material strip is formed inside the puffed material flow holes on the drying isolation plate, spraying isolation plate and discharge plate.

[0018] When the expanded material strip is dried and sprayed with grease, the discharge plate, drying isolation plate, spraying isolation plate and discharge plate of the discharge mold separate.

[0019] The beneficial effects of this invention are:

[0020] 1. The oil coating method of this extruded aquatic feed involves spraying oil on the sides before cutting the extruded feed strips and spraying oil on the ends after cutting the extruded feed strips. The result is extruded pellets with oil coating on both sides and both ends. This method has high processing efficiency and can ensure that the oil coating on the surface of each extruded pellet is in place, thus ensuring the effectiveness and uniformity of the oil coating on the surface of the feed pellets.

[0021] 2. The oil surface spraying component of this extruded aquatic feed is used to realize the above-mentioned spraying method. After the feed is extruded, the sides and two ends of the extruded feed strip are dried and the oil surface is sprayed in sequence. It can realize continuous automatic processing and has high spraying efficiency. Attached Figure Description

[0022] Figure 1 This is a step-by-step diagram of the oil coating method for this extruded aquatic feed;

[0023] Figure 2 This is a schematic diagram of the installation structure of the oil surface spraying component for this extruded aquatic feed;

[0024] Figure 3 This is a schematic diagram of the structure of the grease surface spraying assembly at the start of expansion;

[0025] Figure 4 This is a schematic diagram of the structure of the grease surface spraying assembly when treating expanded material strips;

[0026] Figure 5 This is a schematic diagram of the cutting blade part of the grease surface spraying assembly.

[0027] In the diagram: 1. Expansion cylinder; 2. Discharge mold; 3. Spraying box; 4. Negative pressure box; 5. Drying isolation plate; 6. Spraying isolation plate; 7. Discharge plate; 8. Cutting blade; 9. Cutting cylinder; 10. Collection box; 11. Side drying pipe connector; 12. Side drying air outlet pipe connector; 13. Side spray nozzle; 14. Side paint recovery connector; 15. End face drying pipe connector; 16. End face drying air outlet pipe connector; 17. End face spray nozzle; 18. End face paint recovery connector; 19. Side drying space; 20. Side spraying space; 21. End face processing space; 22. Expansion strip; 23. Expansion granules;

[0028] 201, Extrusion material hole; 31, Discharge port; 51, First material hole; 61, Second material hole; 71, Third material hole; 111, Side drying air inlet pipe; 121, Side drying air outlet pipe; 131, Side spraying material inlet pipe; 141, Side paint recovery pipe; 151, End face drying air inlet pipe; 161, End face drying air outlet pipe; 171, End face spraying material inlet pipe; 181, End face paint recovery pipe. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Reference Figure 2 A spraying assembly for spraying oil onto the surface of extruded aquatic feed includes a spraying box 3 for spraying oil and a negative pressure box 4 for creating a negative pressure inside the spraying box 3.

[0031] refer to Figure 3 The spray box 3 is wrapped around the discharge mold 2 of the puffing cylinder 1. Inside the spray box 3, a drying isolation plate 5, a spraying isolation plate 6, and a discharge plate 7 are arranged sequentially from near to far on the discharge end side of the discharge mold 2. The drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7 are arranged parallel to the discharge plate surface of the discharge mold 2. An puffing material hole 201 is opened on the discharge plate surface of the discharge mold 2. The material inside the puffing cylinder 1 is extruded and puffed through the puffing material hole 201.

[0032] The aforementioned drying isolation plate 5, spraying isolation plate 6, and discharge plate 7 are each provided with expansion material strip flow holes corresponding to the positions and appropriate amounts of the expansion material holes 201. Specifically, the expansion material strip flow hole of the drying isolation plate 5 is located at the first material hole 51, the expansion material strip flow hole of the spraying isolation plate 6 is located at the second material hole 61, and the expansion material strip flow hole of the discharge plate 7 is located at the third material hole 71. The diameters of the first material hole 51, the second material hole 61, and the third material hole 71 are larger than those of the expansion material hole 201, and these holes are used for the passage of the expansion material strip 22.

[0033] The sides of the drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7 are slidably and sealingly connected to the inner wall of the spraying box 3. The spraying box 3 has a sliding space on the discharge side of the discharge mold 2 for sliding the drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7. The bottom of the sliding space is the discharge port 31, which is used for discharging the expanded granules 23. The spraying box 3 is equipped with driving components to move the drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7.

[0034] refer to Figure 3The spray box 3 is provided with a side drying air inlet pipe 111 for drying the side of the expanded material strip 22, a side drying air outlet pipe 121 corresponding to the side drying air inlet pipe 111, a side spray nozzle 13 for grease spraying on the side of the expanded material strip 22, a side paint recovery pipe 141 corresponding to the side spray nozzle 13, an end face drying air inlet pipe 151 for drying the end face of the expanded material strip 22, an end face drying air outlet pipe 161 corresponding to the end face drying air inlet pipe 151, an end face spray nozzle 17 for grease spraying on the end face of the expanded material strip 22, and an end face paint recovery pipe 181 corresponding to the end face spray nozzle 17.

[0035] One end of the side drying air inlet pipe 111 is connected to the drying gas generator, and the other end is connected to the interior of the spray box 3 via the side drying pipe connector 11. One end of the side drying air outlet pipe 121 is connected to the interior of the spray box 3 via the side drying air outlet connector 12, and the other end is connected to the atmosphere. The end face drying air inlet pipe 151 is connected in the same way as the side drying air inlet pipe 111, and the end face drying air outlet pipe 161 is connected in the same way as the side drying air outlet pipe 121. The feed end of the side spray nozzle 13 is connected to the spray box via the side spray feed pipe 131. The side spray nozzle 13 atomizes the paint, and the atomized grease can enter the interior of the spray box 3. The side paint recovery pipe 141 is connected to the interior of the spray box 3 through the side paint recovery connector 14. The side paint recovery pipe 141 is used to recover the atomized grease inside the spray box 3. The side paint recovery pipe 141 is mainly used to generate airflow, which facilitates the spread and distribution of grease in the surface spraying space 20.

[0036] refer to Figure 5 The spray box 3 is also equipped with a cutting blade 8 for cutting the expanded material strip 22. One end of the cutting blade 8 is fixedly connected to the working end of the cutting cylinder 9 via an extension rod. The axis of the cutting cylinder 9 is perpendicular to the discharge direction of the expanded material strip 22, and the cutting blade 8 performs the cutting action from the side of the expanded material strip 22. The spray box 3 has a cutting through hole to accommodate the movement of the cutting blade 8, and the other end of the cutting blade 8 can extend into the interior of the spray box 3 to complete the cutting action. A sealing strip is provided between the spray box 3 and the inner wall of the cutting through hole. The sealing strip always remains in contact with the cutting blade 8, forming a relatively sealed interior of the spray box 3.

[0037] refer to Figure 3When feed extrusion begins, the discharge plate of the discharge mold 2, the drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7 are sequentially attached to each other. The extruded material flow holes on the drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7 are connected to the extruded material holes 201 of the discharge mold 2. The material inside the extrusion cylinder 1 is squeezed out from the extruded material holes 201, and extrusion occurs inside the first material hole 51 of the drying isolation plate 5. The extruded material sequentially passes through the second material hole 61 of the spraying isolation plate 6 and the third material hole 71 of the discharge plate 7, forming the original extruded material strip 22. As the material inside the extrusion cylinder 1 is continuously squeezed out, the drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7 begin to slide. The discharge plate of the feed mold 2, the drying isolation plate 5, the spraying isolation plate 6, and the discharge plate 7 then separate.

[0038] refer to Figure 4 First, the discharge plate of the discharge mold 2 is separated from the drying isolation plate 5 to form a side drying space 19. The side drying pipe joint 11 and the side drying air outlet joint 12 are located between the discharge plate of the discharge mold 2 and the drying isolation plate 5. The drying gas discharged from the side drying air inlet pipe 111 dries the side of the puffed material strip 22 in the side drying space 19, and the generated water vapor is discharged by the side drying air outlet pipe 121.

[0039] Subsequently, the drying isolation plate 5 and the spraying isolation plate 6 separate to form a side spraying space 20. The side spray nozzle 13 and the side paint recovery connector 14 are located between the drying isolation plate 5 and the spraying isolation plate 6. The side spray nozzle 13 atomizes the paint, and the atomized grease can enter the interior of the spraying box 3. The side paint recovery pipe 141 recovers the atomized grease from the spraying box 3, causing the atomized grease to flow inside the side spraying space 20. This causes the grease particles to disperse in the corresponding spraying space, and the sides of the multiple expanded material strips 22 can combine with the grease to complete the side grease spraying.

[0040] Then, an end-face processing space 21 is formed between the spray isolation plate 6 and the discharge plate 7. The cutting blade 8, end-face drying pipe connector 15, end-face drying air outlet connector 16, end-face spray nozzle 17, and end-face paint recovery connector 18 are respectively located between the spray isolation plate 6 and the discharge plate 7. The cutting blade 8 cuts the expanded material strip 22 inside the end-face processing space 21, and expanded particles 23 are formed inside the third material hole 71 of the discharge plate 7. Two end faces are generated inside the end-face processing space 21, including one end face of the expanded particle 23 and one end face located on the expanded material strip 22, with the two end faces facing each other.

[0041] At this time, the end-face drying air inlet pipe 151 and the end-face spray nozzle 17 are respectively connected to the end-face processing space 21. The drying gas discharged from the end-face drying air inlet pipe 151 dries the end faces of the expanded material strip 22 and the expanded particles 23 in the end-face processing space 21, and the generated water vapor is discharged by the end-face drying air outlet pipe 161. An air valve is installed on the end-face drying air outlet pipe 161, which is closed before the end-face drying air inlet pipe 151 starts to supply air. The drying gas generates high pressure inside the end-face processing space 21, so the expanded particles 23 are pushed and slide relative to the third feed hole 71, and the two end faces are further separated, which is beneficial to the drying process. After the two end faces are separated, the end-face drying air outlet pipe 161 is opened.

[0042] After drying, the end-face spray nozzle 17 sprays atomized grease, and the end-face coating recovery pipe 181 recovers the atomized grease from the end-face treatment space 21, causing the atomized grease to flow inside the end-face treatment space 21. The grease particles disperse in the corresponding spraying space, and the two ends of the extruded material can combine with the grease respectively, completing the end-face grease spraying. After the end-face grease spraying is completed, the extruded material strip 22 continues to discharge, pushing out the extruded particles 23 inside the third material hole 71. The extruded particles 23 come out from the discharge port 31 of the spray box 3, leave the negative pressure environment formed inside the negative pressure box 4 and enter the atmosphere. The coating on its surface can penetrate into the feed, complete the penetration, and finally enter the collection box 10 below the spray box 3 for collection.

[0043] During the above process, the puffed material strip 22 is continuously discharged, and the cutting blade 8 continues to cut continuously, so that puffed granules 23 with grease sprayed on the sides and ends can be continuously obtained, thus maintaining the continuity of processing.

[0044] It is worth noting that during the above processing, because the drying isolation plate 5, the spraying isolation plate 6 and the discharge plate 7 were not completely separated in the early stage of discharge, the grease coating on the surface of the puffed particles 23 generated in the early stage of the equipment was not complete, and the puffed particles 23 obtained before the equipment discharge had to be discarded.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for spraying oil onto the surface of extruded aquatic feed, characterized in that, Includes the following steps: Step S1: Dry the sides of the extruded puffed material strip; Step S2: Apply grease to the sides of the extruded puffed material strip; Step S3: Cut the expanded material strips; Step S4: Dry the end face of the cut part of the expanded material strip, and then spray the end face with grease; Step S5: Obtain expanded granules with the sides and two end faces fully coated; The method for spraying the oil surface of the extruded aquatic feed is achieved by a spraying assembly, which includes a spraying box (3) for spraying oil and a negative pressure box (4) for creating a negative pressure inside the spraying box (3). The spraying box (3) is wrapped around the outside of the discharge mold (2) of the extrusion cylinder (1). Inside the spraying box (3), a drying isolation plate (5), a spraying isolation plate (6) and a discharge plate (7) are arranged sequentially from near to far on the discharge end side of the discharge mold (2). The drying isolation plate (5), the spraying isolation plate (6) and the discharge plate (7) are parallel to the discharge plate surface of the discharge mold (2) where the extruded material hole (201) is opened. The drying isolation plate (5), the spraying isolation plate (6) and the discharge plate (7) are respectively provided with extruded material strip flow holes corresponding to the position and appropriate amount of the extruded material hole (201). The sides of the drying isolation plate (5), the spraying isolation plate (6) and the discharge plate (7) are respectively slidably and sealed to the inner wall of the spraying box (3). The spraying box (3) is provided with a side drying air inlet pipe (111) for drying the side of the expanded material strip (22), a side spray nozzle (13) for grease spraying the side of the expanded material strip (22), an end drying air inlet pipe (151) for drying the end face of the expanded material strip (22), and an end face spray nozzle (17) for grease spraying the end face of the expanded material strip (22). The spray box (3) is also equipped with a cutting blade (8) for cutting the expanded material strip (22).

2. The grease surface spraying method according to claim 1, characterized in that, The discharge plate of the discharge mold (2) forms a side drying space (19) between the discharge plate and the drying isolation plate (5), the drying isolation plate (5) forms a side spraying space (20) between the spraying isolation plate (6), and the spraying isolation plate (6) forms an end face treatment space (21) between the discharge plate (7). The side drying air inlet pipe (111) is connected to the side drying space (19), the side spray nozzle (13) is connected to the side spraying space (20), and the end face drying air inlet pipe (151) and the end face spray nozzle (17) are respectively connected to the end face processing space (21). The cutting action of the cutting blade (8) is performed in the end face processing space (21).

3. The grease surface spraying method according to claim 1, characterized in that, When feed puffing begins, the discharge plate, drying isolation plate (5), spraying isolation plate (6) and discharge plate (7) of the discharge mold (2) are attached to each other in sequence. The puffing strip flow holes on the drying isolation plate (5), spraying isolation plate (6) and discharge plate (7) are connected to the puffing material hole (201) of the discharge mold (2). The original puffing strip is formed inside the puffing strip flow holes on the drying isolation plate (5), spraying isolation plate (6) and discharge plate (7).

4. The grease surface spraying method according to claim 1, characterized in that, When the expanded material strip is dried and sprayed with grease, the discharge plate, drying isolation plate (5), spraying isolation plate (6) and discharge plate (7) of the discharge mold (2) are separated. The side drying pipe connector (11) of the side drying air inlet pipe (111) is located between the discharge plate surface of the discharge mold (2) and the drying isolation plate (5). The side spray nozzle (13) is located between the drying isolation plate (5) and the spray isolation plate (6). The end drying pipe connector (15) and the end spray nozzle (17) of the end drying air inlet pipe (151) are located between the spray isolation plate (6) and the discharge plate (7), respectively.

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