Pet feed production and processing granulation equipment

Abstract

The application belongs to the technical field of organic fertilizer and manufacturing, and particularly relates to granulating equipment for pet feed production and processing, which comprises a driving motor and a granulating assembly. The transmission shaft of the driving motor passes through a speed reducer and is connected to the granulating shaft of the granulating assembly through two groups of conical transmission gears. The granulating assembly further comprises a flat die and a compression roller shaft. The granulating shaft passes through the through hole corresponding to the center position of the flat die. An annular groove is formed on the top of the flat die. The flat die is preheated by the auxiliary die, so that the temperature of the granulating assembly is relatively high. The airflow assembly and the discharge hopper are oppositely arranged, so that the external air passes through the airflow assembly and the discharge hopper to form air convection. The temperature difference is formed between the upper and lower flat dies. The temperature in the granulating assembly is relatively high, while the temperature below the flat die is relatively low. The pressure difference is formed, so that the materials in the granulating assembly are pushed out under the action of mechanical extrusion and pressure difference. The granulating equipment is beneficial to solving the problem of granulating blockage during long-time starting.

Description

Technical Field

[0001] This invention relates to the field of organic fertilizer and manufacturing technology, specifically to a pelleting equipment for pet food production and processing. Background Technology

[0002] Organic feed is a feed product produced by an organic production system using organic feed ingredients and processed in accordance with relevant organic feed standards. Organic feed does not use chemically synthesized drugs and additives, which helps reduce the accumulation of harmful substances in animals and thus reduces the incidence of disease.

[0003] The existing patent (publication number CN118179370B) and a feed pellet mill, through the activation of a rotating component, cause the positions of pelleting fan plate one, pelleting fan plate two, pelleting fan plate three and pelleting fan plate four to rotate, thereby adjusting the position of pelleting fan plates with different cylindrical hole sizes, finding a suitable pelleting fan plate that is not blocked by the obstruction component, and after adjustment, pelleting is carried out. It can quickly adjust the pelleting fan plates of different sizes to produce feed pellets of different sizes, realize the production of feed pellets of different sizes, improve the flexibility of the production line, meet the feeding needs of different animals, improve production efficiency, and increase the applicability of the device. Because the current pelleting adopts the extrusion discharge method, if the pressure is not uniform or the material is insufficient, a large amount of residue will appear on the pelleting fan plate, and hardening and blockage will occur due to moisture loss, so the pelleting fan plate needs to be cleaned before restarting the machine.

[0004] Existing patent (publication number CN116212743B) and a flat die pellet mill that can improve the utilization rate of biomass raw materials. In this patent, after the biomass raw material enters the pelleting chamber through the feed hopper, the main shaft rotates under the drive of the power mechanism. The main shaft drives the pressure rollers in the pelleting chamber to start working. The biomass raw material is crushed by a crusher and then moves downwards, entering the first layer of pressure rollers and flat die for the first extrusion molding. It then enters the second layer of pressure rollers and flat die for the second extrusion molding. Finally, a cutter cuts the biomass into biomass pellets of the required length and size, which then fall into the feeding trough, completing the entire pelleting process. This patent utilizes rotation, roller pressing, crushing, and the first... In the initial stage of the pelleting process, the temperature of the pelleting equipment is generally low. The feed cannot gelatinize due to the lack of temperature, affecting the quality of the organic feed. After 5 minutes of operation, the mechanical friction generates a large amount of heat, which promotes starch gelatinization and causes the organic matter in the feed to become semi-cooked. However, after continuous operation for more than 30 minutes, the temperature inside and outside the pelleting chamber rises, leading to blockages or uneven discharge from some flat dies. This also causes the feed pellets to overheat, making them unsuitable for direct bagging and requiring them to be spread out to dissipate heat. Condensation can easily occur, causing the pellets to stick. Furthermore, with continuous operation, the material inside the pelleting chamber remains in a state of accumulation, making it difficult for moisture to evaporate and resulting in insufficient feed hardness.

[0005] Therefore, we propose a pelleting equipment for pet food production and processing. The airflow component quickly removes heat, which helps to create a pressure difference by utilizing the temperature difference, allowing the material to be discharged under pressure, reducing clogging. The airflow component also introduces more oxygen, allowing the semi-cooked feed to come into contact with oxygen, further gelatinizing the starch and helping to form a more uniform and stable feed pellet structure. At the same time, the airflow can remove moisture and powder from the outside of the feed pellets, making the feed pellets harder, more resistant to storage, and ready for direct bagging. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pelleting device for pet food production and processing to solve the problems existing in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pelleting device for pet food production and processing, comprising a drive motor and a pelleting component. The drive motor's transmission shaft passes through a reducer and is then connected to the pelleting shaft of the pelleting component by two sets of conical transmission teeth. The pelleting component further comprises a flat die and a pressure roller shaft. The pelleting shaft passes through a through hole corresponding to the center position of the flat die. An annular groove is provided on the top of the flat die, and pelleting holes are uniformly provided on the surface of the annular groove. Two sets of pressure roller shafts are symmetrically connected to the outer wall of the pelleting shaft. A rotary auxiliary die is provided at the bottom of the flat die. Rotating the auxiliary die closes the pelleting holes of the flat die. An opening is provided on the side wall below the pelleting component, and an airflow component is provided at the opening. The pressure roller shaft is located in the annular groove of the flat die and rolls in a ring to generate heat through friction. The airflow component accelerates the airflow below the flat die, and a pressure difference is formed above and below the flat die by a temperature difference.

[0008] Furthermore: the top of the granulation component is connected to a feed cylinder, and the outer wall of the granulation component is provided with a discharge hopper, the discharge hopper and the airflow component are symmetrically arranged.

[0009] Furthermore: the auxiliary mold surface is provided with holes in the same position as the granulation holes on the flat mold, the auxiliary mold surface that fits into the flat mold is provided with a sliding groove, the outer surface of the flat mold is provided with a sliding block that matches the sliding groove, the rotation of the sliding block and the sliding groove causes the auxiliary mold to rotate independently, and the holes on the auxiliary mold and the granulation holes on the flat mold are staggered to form a closed loop.

[0010] Furthermore: the airflow assembly includes a fan, a first filter and a second filter, the fan being located between the first filter and the second filter, and the airflow from the fan being directed toward the corresponding discharge hopper.

[0011] Furthermore, the airflow assembly also includes a circulation pipe and a circulation pump. The circulation pipe is located between the second filter and the fan, and the two ends of the circulation pipe are connected to the circulation pump.

[0012] Furthermore, a temperature sensor is placed in the groove on the outer surface of the flat mold.

[0013] Furthermore: a locking nut is screwed onto the top of the granulation shaft, and semi-circular grooves are opened on the outer walls of the two sets of pressure roller shafts, and the two sets of pressure roller shafts roll in a ring around the granulation shaft.

[0014] Furthermore: a ring sleeve is nested and installed on the granulation shaft below the flat die, and pelletizing blades are symmetrically arranged on both sides of the ring sleeve. The ring sleeve rotates synchronously with the granulation shaft.

[0015] Compared with the prior art, the technical effects and advantages of the present invention are as follows:

[0016] 1) The pelleting equipment for pet food production and processing of the present invention, through the setting of the auxiliary mold, the auxiliary mold is attached to the flat mold, and the holes on the auxiliary mold correspond to the pelleting holes of the flat mold, without affecting the normal pelleting function. By grasping the auxiliary mold and rotating it, the sliding block of the flat mold in the fixed state slides in the sliding groove of the auxiliary mold, thereby making the holes on the auxiliary mold and the pelleting holes of the flat mold intersect, thereby closing the auxiliary mold to the flat mold, and then starting the pelleting component, which can quickly increase the mechanical temperature, so that the organic feed enters semi-cooking under the action of high temperature, which is conducive to ensuring the stability of feed quality and improving feed quality.

[0017] 2) The pelleting equipment for pet food production and processing of the present invention, through the setting of the airflow component, preheats the pelleting component to make the organic feed semi-cooked, and the airflow component makes the pelleted feed come into rapid contact with oxygen, so that the starch in the organic feed gelatinizes and promotes enzymatic reaction. At the same time, the airflow can remove the temperature and surface moisture of the pelleted feed, so as to avoid the heat not being able to evaporate quickly after direct bagging, and the long-term high temperature will affect the feed quality. Meanwhile, the loss of moisture from the outer wall of the feed will increase the hardness of the feed, which is beneficial for the bagging of the pelleted feed.

[0018] 3) The pet food production and processing pelleting equipment of the present invention, through the airflow component and auxiliary mold setting, because during the flat die pelleting process, the high temperature and starch gelatinization of the feed can cause the pelleting holes of the flat die to become blocked, affecting the pelleting effect, the auxiliary mold closes the flat die to preheat the pelleting component, so that the temperature of the pelleting component is higher. Through the airflow component and the discharge hopper being set opposite each other, the external air passes through the airflow component and the discharge hopper to form air convection, so that a temperature difference is formed between the top and bottom of the flat die. The temperature inside the pelleting component is higher, while the temperature below the flat die is lower, thus creating an air pressure difference. As a result, the material inside the pelleting component is pushed out under the action of mechanical extrusion and pressure difference, which helps to solve the problem of pelleting blockage during long-term start-up of the pelleting equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the disassembled structure of the granulation component of the present invention;

[0021] Figure 3 This is a schematic diagram of the granulation component assembly structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the flat mold structure of the present invention;

[0023] Figure 5 This is a schematic cross-sectional view of the granulation component and airflow component of the present invention;

[0024] Figure 6 This is a schematic diagram of the airflow assembly structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the drive motor transmission structure of the present invention.

[0026] The attached figures are labeled as follows: 1. Drive motor; 2. Reducer; 3. Feed cylinder; 4. Granulation assembly; 41. Locking nut; 42. Granulation shaft; 43. Pressure roller shaft; 44. Through hole; 45. Granulation hole; 46. Flat die; 461. Sliding block; 462. Auxiliary die; 463. Sliding groove; 464. Temperature sensor; 47. Ring sleeve; 48. Pelletizer; 49. Conical transmission gear; 5. Discharge hopper; 6. Airflow assembly; 61. First filter screen; 62. Fan; 63. Circulation pipe; 64. Second filter screen; 65. Circulation pump. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The structures involved in the present invention are not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example:

[0029] Please see Figure 1-7 The present invention provides a technical solution: a pelleting equipment for pet food production and processing, including a drive motor 1 and a pelleting component 4. The top of the pelleting component 4 is connected to a feed cylinder 3, and the material of organic feed is added into the pelleting component 4 through the feed cylinder 3. The outer wall of the pelleting component 4 is provided with a discharge hopper 5, and the pelleted feed is discharged through the discharge hopper 5. The discharge hopper 5 and the airflow component 6 are symmetrically arranged, and the external air can form air convection through the discharge hopper 5 and the airflow component 6.

[0030] The drive shaft of the drive motor 1 passes through the reducer 2 and is then connected to the granulation shaft 42 of the granulation component 4 by two sets of conical transmission teeth 49. By starting the drive motor 1, the torque of the drive shaft is increased through the reducer 2, and the power direction is changed by the two sets of conical transmission teeth 49, so that the drive motor 1 drives the granulation shaft 42 to rotate.

[0031] The pelleting assembly 4 also includes a flat die 46 and a pressure roller shaft 43. The pelleting shaft 42 passes through the through hole 44 at the center of the flat die 46. The top of the flat die 46 has an annular groove surface, and pelleting holes 45 are evenly distributed on the surface of the annular groove surface. The inner diameter of the pelleting holes 45 represents the size of the feed pellets. The size of the feed pellets can be changed by changing the flat die 46. Two sets of pressure roller shafts 43 are symmetrically connected to the outer wall of the pelleting shaft 42. The outer walls of the two sets of pressure roller shafts 43 have semi-circular groove surfaces. The two sets of pressure roller shafts 43 roll in a ring around the pelleting shaft 42. Through the ring rolling of the pressure roller shafts 43, the semi-circular groove surfaces on their outer walls can reciprocate to crush the feed. Under the rolling extrusion of the roller 43, the crushed feed is extruded into the pelleting hole 45 of the flat die 46. A locking nut 41 is screwed onto the top of the pelleting shaft 42 to lock and fix the pelleting shaft 42. It should be noted that when the pelleting component 4 does not produce pellets, it is often because the locking nut 41 is not tightened properly. A ring sleeve 47 is nested on the pelleting shaft 42 below the flat die 46. Pellet cutters 48 are symmetrically arranged on both sides of the ring sleeve 47. The ring sleeve 47 rotates synchronously with the pelleting shaft 42. The feed passes through the pelleting hole 45 of the flat die 46 into a long strip shape. The ring sleeve 47 of the pelleting shaft 42 drives the cutter to rotate, cutting the long strip of feed into pellets.

[0032] A rotary auxiliary mold 462 is provided at the bottom of the flat mold 46. Rotating the auxiliary mold 462 closes the granulation holes 45 of the flat mold 46. The surface of the auxiliary mold 462 is provided with holes in the same position as the granulation holes 45 on the flat mold 46. During normal granulation, the holes on the auxiliary mold 462 correspond one-to-one with the granulation holes 45 on the flat mold 46. A sliding groove 463 is provided on the surface of the auxiliary mold 462 that fits against the flat mold 46. A sliding block 461 matching the sliding groove 463 is provided on the outer surface of the flat mold 46. The rotation of the sliding block 461 and the sliding groove 463 causes the auxiliary mold 462 to rotate independently. The holes on the auxiliary mold 462 and the granulation holes 45 on the flat mold 46 alternate to form a closed structure. The auxiliary mold 462 fits into the flat mold 46, with the holes on the auxiliary mold 462 corresponding to the granulation holes 45 of the flat mold 46, without affecting the normal granulation function. By grasping the auxiliary mold 462 and rotating it, the sliding block 461 of the flat mold 46 in the fixed state slides in the sliding groove 463 of the auxiliary mold 462, thereby causing the holes on the auxiliary mold 462 and the granulation holes 45 of the flat mold 46 to intersect, thus sealing the flat mold 46 with the auxiliary mold 462, and thus starting the granulation component 4. The machine generates a lot of heat during the reciprocating crushing and extrusion of the feed, which can quickly increase the temperature of the machine, so that the organic feed enters semi-cooking under the action of high temperature, which can ensure the stability of feed quality and improve feed quality.

[0033] An opening is provided on the side wall below the granulation component 4, and an airflow component 6 is provided at the opening. The pressure roller shaft 43 is located in the annular groove of the flat die 46 and rolls in annular friction to generate heat. The main reason why traditional flat die granulation is prone to clogging is that during the long-term extrusion granulation process, the temperature of the flat die 46 continues to rise, and the heat cannot be dissipated, resulting in a high temperature on the inner wall of the granulation hole 45. As the feed is partially cooked and the starch gelatinizes due to the high temperature, when the feed passes through the granulation hole 45, the moisture in the area in contact with the granulation hole 45 evaporates rapidly, causing the starch to coagulate and harden, forming a blockage.

[0034] Furthermore, feed is often directly bagged after pelleting. Because it is placed in the external environment, it is easy to come into contact with a large number of microorganisms, causing the organic feed to deteriorate. It also absorbs a lot of dust. However, with traditional pelleting equipment, the feed still retains a lot of temperature after pelleting. If the feed pellets are directly bagged, the temperature of the bagged feed pellets is difficult to evaporate. The continuous high temperature will lead to the loss of nutrients inside the organic feed.

[0035] The airflow component 6 accelerates the airflow speed below the flat mold 46. The flat mold 46 has a pressure difference formed by the temperature difference between its upper and lower parts. The airflow component 6 includes a fan 62, a first filter 61, and a second filter 64. The fan 62 is located between the first filter 61 and the second filter 64. The airflow of the fan 62 is directed towards the corresponding discharge hopper 5. The first filter 61 blocks external dust from entering, and the second filter 64 blocks feed from entering the airflow component 6. By activating the fan 62 to generate airflow, the pelleted feed will also move towards the discharge hopper 5 under the influence of the airflow.

[0036] The auxiliary mold 462 closes the flat mold 46 to preheat the granulation component 4, resulting in a higher temperature for the granulation component 4. The airflow component 6 and the discharge hopper 5 are set opposite each other, so that the external air flows through the airflow component 6 and the discharge hopper 5 to form air convection, creating a temperature difference between the top and bottom of the flat mold 46. The temperature inside the granulation component 4 is higher, while the temperature below the flat mold 46 is lower, resulting in a pressure difference. As a result, the material inside the granulation component 4 is pushed out under the action of mechanical extrusion and pressure difference, which solves the problem of granulation blockage during long-term start-up of the granulation equipment.

[0037] By preheating the pelleting component 4, the organic feed enters a semi-cooked state. The airflow component 6 allows the pelleted feed to quickly come into contact with oxygen, which gelatinizes the starch in the organic feed and promotes enzymatic reactions. At the same time, the airflow can remove the temperature and surface moisture of the pelleted feed, preventing the heat from not being able to evaporate quickly after direct bagging, which would affect the feed quality due to prolonged high temperature. In addition, the loss of moisture from the outer wall of the feed will increase the hardness of the feed. The pelleted feed is then bagged.

[0038] Starch and enzymes are common components in organic feed. The role of oxygen in the feed pelleting process is mainly to promote starch gelatinization and enzyme activation.

[0039] Starch gelatinization: Gelatinization is a physical change that occurs when starch granules are heated in water. It causes the starch granules to absorb water, swell, and rupture, which not only increases the digestibility of starch but also improves its nutritional value.

[0040] By promoting starch gelatinization, oxygen helps form a more uniform and stable feed pellet structure, which not only facilitates animal digestion and absorption but also improves feed durability and resistance to breakage.

[0041] Enzyme activation: Oxygen provides the necessary oxygen supply to enzymes, thereby activating their activity. Enzymes are biological catalysts that catalyze various chemical reactions in living organisms, including the breakdown of starch and the synthesis of proteins. They also help maintain enzyme stability and prevent inactivation under high-temperature conditions. This is because oxygen can react with amino acid residues in enzymes to form stable covalent bonds, thus protecting the enzyme's structure from damage.

[0042] Airflow helps evaporate moisture from the outer wall of feed pellets, thereby reducing the moisture content of the pellets. This is crucial for preventing the growth of microorganisms and feed spoilage. When the outer wall of the feed pellets is dehydrated, the hardness of the feed pellets can be increased, reducing the breakage rate during transportation and storage, maintaining the integrity of the pellets, and allowing the feed pellets to be directly bagged. Specific Implementation Example 2

[0044] Different organic raw materials are selected for different pets. For example, animals in the breeding or raising stage need feed with higher fat content, or some herbivores need to add probiotics to aid digestion, or feed with added vitamins. High temperature has a greater impact on feed containing the above three ingredients, so it is necessary to improve the cooling effect.

[0045] Another situation is when the equipment needs to continuously granulate, that is, continuously granulate for more than 120 minutes, which will cause the temperature in the equipment to remain at a high level.

[0046] The airflow assembly 6 further includes a circulation pipe 63 and a circulation pump 65. The circulation pipe 63 is located between the second filter 64 and the fan 62, and the two ends of the circulation pipe 63 are connected to the circulation pump 65.

[0047] When the circulation pump 65 is started, water flows through the circulation pipe 63, and the airflow from the fan 62 flows through the circulation pipe 63, carrying away some of the heat through the liquid. Specific Implementation Example 3

[0049] A temperature sensor 464 is placed in a groove on the outer surface of the flat mold 46. The temperature sensor 464 can be used with a warning light. When the temperature reaches a predetermined stability, the green light will illuminate, and when the temperature exceeds the threshold, the red light will illuminate.

[0050] Temperature sensor 464 can be used to detect the temperature of flat mold 46. When the flat mold 46 reaches the predetermined temperature at startup, the closed auxiliary mold 462 can be opened for granulation.

[0051] Alternatively, if the equipment operates continuously and the temperature of the flat mold 46 continues to rise, reaching the temperature threshold (reference value is 80℃), the equipment needs to be stopped to dissipate heat and prevent excessive temperature from affecting feed quality.

[0052] The working principle of this invention embodiment is as follows: When the equipment is started from cold, the auxiliary mold 462 is in a closed state. The organic feed material is added to the pelleting component 4 through the feed cylinder 3. The drive motor 1 is started, causing the transmission shaft to increase torque through the reducer 2. The power direction is changed through two sets of conical transmission teeth 49, which completes the rotation of the pelleting shaft 42 driven by the drive motor 1. The pelleting shaft 42 drives the pressure roller shaft to roll in a ring, so that the semi-circular groove surface on its outer wall can reciprocate to crush the feed. Then, through the rolling and squeezing of the pressure roller shaft, the temperature of the pelleting component 4 rises under mechanical friction. This can be achieved by preheating for five minutes, or... When the temperature sensor 464 detects that the predetermined temperature has been reached, the warning light turns green, and the equipment is paused. By grasping and rotating the auxiliary mold 462, the sliding block 461 of the flat mold 46, which is in a fixed state, slides in the sliding groove 463 of the auxiliary mold 462, thereby aligning the hole of the auxiliary mold 462 with the granulation hole 45 of the flat mold 46. The equipment is then restarted, and the crushed feed is squeezed and fed into the granulation hole 45 of the flat mold 46. The feed passes through the granulation hole 45 of the flat mold 46 and grows into a strip. The ring 47 of the granulation shaft 42 drives the cutting blade to rotate, cutting the strip of feed into individual pellets. The pelleted feed is discharged through the discharge hopper 5.

[0053] The airflow assembly 6 and the discharge hopper 5 are symmetrically arranged. The first filter 61 blocks external dust from entering, and the second filter 64 blocks feed from entering the airflow assembly 6. The fan 62 is activated to generate airflow, and the pelleted feed will also move towards the discharge hopper 5 under the influence of the airflow.

[0054] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalents of the claims be included within the present invention, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pelleting device for pet food production and processing, comprising a drive motor (1) and a pelleting assembly (4), wherein the drive shaft of the drive motor (1) passes through a reducer (2) and is then connected to the pelleting shaft (42) of the pelleting assembly (4) by two sets of conical drive teeth (49), the pelleting assembly (4) further comprising a flat die (46) and pressure roller shafts (43), the pelleting shaft (42) passing through a through hole (44) corresponding to the center position of the flat die (46), the top of the flat die (46) having an annular groove surface, the surface of the annular groove surface having uniformly formed pelleting holes (45), and two sets of pressure roller shafts (43) symmetrically connected to the outer wall of the pelleting shaft (42), characterized in that: The bottom of the flat mold (46) is provided with a rotating auxiliary mold (462). Rotating the auxiliary mold (462) closes the granulation hole (45) of the flat mold (46). The side wall below the granulation component (4) is provided with an opening. An airflow component (6) is provided at the opening. The pressure roller shaft (43) is located in the annular groove of the flat mold (46) and generates heat through annular rolling friction. The airflow component (6) accelerates the airflow speed below the flat mold (46). The pressure difference is formed by the temperature difference between the top and bottom of the flat mold (46). The top of the granulation component (4) is connected to the feed cylinder (3), and the outer wall of the granulation component (4) is provided with a discharge hopper (5). The discharge hopper (5) and the airflow component (6) are symmetrically arranged. The auxiliary mold (462) has holes on its surface that are in the same position as the granulation holes (45) on the flat mold (46). The auxiliary mold (462) has a sliding groove (463) on its surface that fits into the flat mold (46). The outer surface of the flat mold (46) has a sliding block (461) that matches the sliding groove (463). The rotation of the sliding block (461) and the sliding groove (463) causes the auxiliary mold (462) to rotate independently. The holes on the auxiliary mold (462) and the granulation holes (45) on the flat mold (46) are staggered to form a closed loop.

2. The pelleting equipment for pet food production and processing according to claim 1, characterized in that: The airflow assembly (6) includes a fan (62), a first filter (61) and a second filter (64). The fan (62) is located between the first filter (61) and the second filter (64), and the airflow of the fan (62) is directed toward the corresponding discharge hopper (5).

3. The pelleting equipment for pet food production and processing according to claim 2, characterized in that: The airflow assembly (6) also includes a circulation pipe (63) and a circulation pump (65). The circulation pipe (63) is located between the second filter (64) and the fan (62). The two ends of the circulation pipe (63) are connected to the circulation pump (65).

4. The pelleting equipment for pet food production and processing according to claim 3, characterized in that: A temperature sensor (464) is placed in a groove on the outer surface of the flat mold (46).

5. The pelleting equipment for pet food production and processing according to claim 1, characterized in that: The top of the granulation shaft (42) is screwed with a locking nut (41), and the outer walls of the two sets of pressure roller shafts (43) are provided with semi-circular grooves. The two sets of pressure roller shafts (43) roll in a ring around the granulation shaft (42).

6. The pelleting equipment for pet food production and processing according to claim 1, characterized in that: A ring sleeve (47) is nested on the granulation shaft (42) below the flat mold (46). Pelletizers (48) are symmetrically arranged on both sides of the ring sleeve (47). The ring sleeve (47) rotates synchronously with the granulation shaft (42).

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