Extrusion mechanism for pet food production

Abstract

The utility model relates to pet food production technical field provides an extrusion mechanism for pet food production, including support board and support frame, in the utility model, through setting index plate, locating recess and positioning piece, the locating recess of index plate four corners corresponds four extrusion sieve boxes, and cooperates the elastic locking structure of positioning piece, can ensure that the rotating switch after the rotating plate and extrusion bucket accurate stay in target station, avoid the position deviation caused by rotation inertia, vibration etc., guarantee the alignment accuracy of extrusion bucket and different sieve boxes, directly promote the consistency of pet food forming, the positioning pin of positioning piece is always closely embedded with locating recess through elastic piece, forms mechanical locking force, the reaction force produced by raw material extrusion, equipment operation vibration etc.

Description

Technical Field

[0001] This utility model relates to the field of pet food production technology, and in particular to an extrusion mechanism for pet food production. Background Technology

[0002] Pet food refers to food specifically designed for pets and small animals. It's a high-end animal food positioned between human food and traditional livestock feed. As people's living standards improve, pets are playing an increasingly important role in families, leading to the booming development of the pet food industry. Pet food comes in many varieties, including dry pet food, wet pet food, and pet treats. The extrusion mechanism, as a key piece of equipment in the pet food production process, directly impacts the quality, production efficiency, and production costs of pet food.

[0003] In the prior art, such as Chinese Patent No. CN 222764743 U, a support plate, switching assembly, extrusion assembly, lifting hydraulic rod, and support plate are included. The switching assembly includes a support frame, a rotary motor, a rotating plate, a support column, and an extrusion screen box. The extrusion assembly includes a collar, an extrusion barrel, a discharge cover plate, a top plate, a bottom plate, a threaded rod, a drive motor, an extrusion disc, a chute, and a feed cover plate. This utility model belongs to the field of pet food production technology. By turning on the rotary motor, the extrusion barrel can be rotated. By turning on the lifting hydraulic rod, it can extend and retract, causing the extrusion barrel to rise and fall. This allows for easy switching between different specifications of extrusion screen boxes to adjust the thickness of the extruded meat strips according to production needs. By turning on the drive motor, the threaded rod can be rotated, which facilitates the extrusion disc to slide down the chute to scrape and extrude the pet food raw materials in the extrusion barrel, preventing residue.

[0004] While the above solution has the advantages mentioned above, its disadvantage is that when the rotating motor drives the plate to switch the extrusion screen box, it does not position it. If the positioning is incorrect, the extrusion barrel and the screen box may not be aligned properly, affecting the meat strip forming accuracy. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art where, when a rotary motor drives a rotating plate to switch the extrusion screen box, it is not positioned. If the positioning is incorrect, the extrusion barrel and the screen box may not be aligned properly, affecting the accuracy of meat strip forming.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an extrusion mechanism for pet food production, comprising a support plate and a support frame, and further comprising:

[0007] An opening is formed inside the support frame;

[0008] A rotary motor is mounted on the bottom wall of the opening;

[0009] A rotating plate is located at the top of the support frame;

[0010] The output end of the rotary motor passes through the top of the support frame and is bolted to the bottom of the rotating plate;

[0011] A positioning plate is installed at the output end of the rotary motor;

[0012] Indexing plate, installed at the output end of the rotary motor;

[0013] The indexing plate is located on top of the positioning plate;

[0014] Four positioning grooves are formed at the four corners of the indexing plate;

[0015] The positioning element is installed on the top of the support frame.

[0016] In a preferred embodiment, the positioning element includes:

[0017] A fixing cylinder is installed on the top of the support frame;

[0018] An elastic element is located inside the cavity of the fixed cylinder;

[0019] A positioning pin is provided at the bottom of the fixed cylinder;

[0020] The positioning pin is elastically connected to the fixed cylinder through an elastic element, and the bottom end of the positioning pin is adapted to the positioning groove.

[0021] The technical effect of adopting the above-mentioned further solution is that the elastic force of the elastic element ensures that the positioning pin is always tightly matched with the positioning groove of the indexing plate. After the rotating motor drives the rotating plate to switch positions, it can automatically achieve mechanical locking and positioning, ensuring the positional stability of the rotating plate and the extrusion barrel, avoiding deviation caused by vibration and other factors during the production process, and improving the accuracy of position switching.

[0022] In a preferred embodiment, the positioning element further includes:

[0023] A pull cord is installed at the top of the positioning pin;

[0024] The top end of the pull rope passes through the fixed cylinder, and the pull rope is slidably engaged with the fixed cylinder.

[0025] A handle is installed on the top of the fixed cylinder.

[0026] The technical effect of adopting the above-mentioned further solution is that by manually pulling the handle to move the pull rope upward, the positioning pin compression elastic element is disengaged from the positioning groove, which can easily release the locking state and facilitate the rotation of the turntable to switch the work position; at the same time, the sliding cooperation between the pull rope and the fixed cylinder ensures the smoothness of operation, takes into account the reliability of positioning and the convenience of work position switching, and reduces the difficulty of manual operation.

[0027] In a preferred embodiment, the extrusion mechanism for pet food production further includes:

[0028] A through hole is formed at one end of the rotating plate;

[0029] The through hole is coaxially arranged with the fixed cylinder, and the diameter of the through hole is slightly larger than the diameter of the fixed cylinder.

[0030] The technical effect of adopting the above-mentioned further solution is that the through hole on the rotating plate is coaxial with the fixed cylinder and has a slightly larger diameter, which provides clearance for the rotation of the rotating plate, avoids mechanical interference between the rotating plate and the fixed cylinder, and ensures smooth rotation.

[0031] In a preferred embodiment, the extrusion mechanism for pet food production further includes:

[0032] An extrusion barrel is disposed on one side of the rotating plate;

[0033] A collar is installed on the outer surface of the extrusion barrel;

[0034] One side of the rotating plate is connected to one side of the collar.

[0035] The technical effect of adopting the above-mentioned further solution is that the extrusion barrel is connected to the rotating plate through a collar, so that the extrusion barrel can rotate and rise synchronously with the rotating plate, achieving stable linkage with the rotating plate; the collar connection method not only ensures the installation of the extrusion barrel, but also facilitates the disassembly, maintenance or replacement of the extrusion barrel in the later stage, improving the practicality of the equipment.

[0036] In a preferred embodiment, the extrusion mechanism for pet food production further includes:

[0037] Two electric heating rings are installed on the outer surface of the extrusion barrel;

[0038] The two electric heating rings are distributed on both sides of the collar.

[0039] The technical effect of adopting the above-mentioned further solution is that the two electric heating rings are distributed on both sides of the collar, which can uniformly heat the extrusion barrel, so that the pet food raw materials in the barrel are heated evenly, promote the full process of starch gelatinization, protein denaturation and other process reactions in the raw materials, improve the plasticity of the raw materials, and ensure the stable quality of the extruded pet food.

[0040] In a preferred embodiment, the extrusion mechanism for pet food production further includes:

[0041] A support plate is disposed at the bottom of the support plate;

[0042] Two lifting hydraulic rods are installed on both sides of the top of the support plate;

[0043] The output ends of both of the lifting hydraulic rods are connected to the bottom of the support plate.

[0044] The technical effect of adopting the above-mentioned further solution is that the two lifting hydraulic rods on the support plate are symmetrically arranged, which can provide stable support and lifting driving force for the support plate and the structure above, so that the lifting action is smooth and without tilting, ensuring that the extrusion barrel remains horizontal during the lifting process, avoiding equipment deformation or positioning deviation caused by uneven force, and improving the stability of the lifting process.

[0045] In a preferred embodiment, the extrusion mechanism for pet food production further includes:

[0046] A rod-type linear displacement sensor is installed on the outside of the cylinder of the lifting hydraulic rod;

[0047] The detection end of the pull rod type linear displacement sensor is connected to the bottom of the support plate, and the pull rod type linear displacement sensor is electrically connected to the lifting hydraulic rod through a PLC controller. The extension and retraction of the lifting hydraulic rod is completely synchronized with the lifting height of the extrusion barrel, so the stroke of the lifting hydraulic rod can be directly measured to accurately reflect the position of the extrusion barrel.

[0048] The technical advantages of adopting the above-mentioned further solution are as follows: the pull rod type linear displacement sensor, together with the lifting hydraulic rod and PLC controller, can accurately detect the stroke of the lifting hydraulic rod in real time, thereby accurately reflecting the lifting position of the extrusion barrel; the PLC control realizes the deceleration action when the extrusion barrel approaches the screen box, avoiding component damage caused by hard contact, while ensuring the precise alignment of the extrusion barrel and the screen box, improving production safety and product forming accuracy.

[0049] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0050] 1. This utility model, through the setting of an indexing plate, positioning grooves and positioning components, with the positioning grooves at the four corners of the indexing plate corresponding to four extrusion sieve boxes, combined with the elastic locking structure of the positioning components, ensures that the rotating plate and extrusion barrel accurately stop at the target position after rotation switching, avoiding positional deviation caused by rotational inertia, vibration, etc., ensuring the alignment accuracy of the extrusion barrel and different sieve boxes, directly improving the consistency of pet food molding. The positioning pin of the positioning component is always tightly engaged with the positioning groove through the elastic component, forming a mechanical locking force. The reaction force generated by raw material extrusion and the vibration of equipment operation will not cause the rotating plate to shift, ensuring the relative position stability of the extrusion barrel and sieve boxes throughout the production process, reducing problems such as material leakage and irregular molding caused by displacement, and reducing the scrap rate.

[0051] 2. This utility model, through the installation of a displacement sensor and electric heating rings, utilizes a displacement sensor to monitor the distance between the extrusion barrel and the sieve box in real time. The sensor automatically decelerates as the extrusion barrel approaches the sieve box, achieving a precise stop. This completely avoids the hard collisions between the extrusion barrel and the sieve box caused by judgment errors in traditional manual operation, reducing the risk of component deformation and wear, and extending the equipment's service life. Two electric heating rings are symmetrically distributed on the outside of the extrusion barrel, providing uniform circumferential heating to the raw materials inside. This allows the raw materials (such as mixtures containing starch and minced meat) to fully gelatinize and denature at high temperatures, enhancing their viscosity and plasticity. This ensures that the raw materials can pass smoothly through the sieve box holes during extrusion, reducing blockages, while also ensuring that the formed meat strips have a firm structure and are not easily broken. For different pet food formulations, the electric heating rings can adjust the temperature to adapt to the characteristics of the raw materials, enabling the equipment to produce a wider variety of pet food products and increasing product diversity. Attached Figure Description

[0052] Figure 1 This is a perspective view of an embodiment of this application;

[0053] Figure 2 This is a perspective cross-sectional view of the support frame according to an embodiment of this application;

[0054] Figure 3 This is a three-dimensional exploded view of the positioning plate and indexing plate according to an embodiment of this application;

[0055] Figure 4 This is a perspective cross-sectional view of the fixing cylinder according to an embodiment of this application;

[0056] Figure 5 This is a perspective view of the electric heating ring according to an embodiment of this application.

[0057] Legend:

[0058] 1. Support plate; 2. Lifting hydraulic rod; 3. Support plate; 4. Support frame; 5. Rotating plate; 6. Extrusion barrel; 7. Electric heating ring; 8. Collar; 9. Opening; 10. Pull rod type linear displacement sensor; 11. Rotary motor; 12. Positioning groove; 13. Positioning plate; 14. Indexing plate; 15. Fixed cylinder; 16. Positioning pin; 17. Elastic element; 18. Pull rope; 19. Handle; 20. Through hole. Detailed Implementation

[0059] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0060] Example 1:

[0061] Please see Figures 1-5 This embodiment provides an extrusion mechanism for pet food production, the specific concept of which is as follows:

[0062] An extrusion mechanism for pet food production includes a support plate 3 and a support frame 4. The extrusion mechanism for pet food production also includes an opening 9, a rotary motor 11, a rotating plate 5, a positioning plate 13, an indexing plate 14, four positioning grooves 12, and positioning elements.

[0063] The opening 9 is located inside the support frame 4.

[0064] The rotary motor 11 is installed on the bottom wall of the opening 9.

[0065] The rotating plate 5 is located at the top of the support frame 4.

[0066] In addition, the output end of the rotary motor 11 is bolted through the top of the support frame 4 and to the bottom of the rotating plate 5.

[0067] The positioning plate 13 is installed at the output end of the rotary motor 11.

[0068] The indexing plate 14, which serves as an alignment component, is mounted on the output end of the rotary motor 11 and is located on top of the positioning plate 13.

[0069] Among them, four positioning grooves 12 that serve as limiters are provided at the four corners of the indexing plate 14.

[0070] The positioning component is installed on the top of the support frame 4.

[0071] As examples, in this embodiment, the positioning components include: a fixed cylinder 15, an elastic element 17, a positioning pin 16, a pull rope 18, and a handle 19.

[0072] The fixed cylinder 15 is installed on the top of the support frame 4.

[0073] The elastic element 17 is located inside the fixed cylinder 15.

[0074] The positioning pin 16, which serves as a limit, is located at the bottom of the fixed cylinder 15.

[0075] In addition, the positioning pin 16 is elastically connected to the fixed cylinder 15 through the elastic element 17, and the bottom end of the positioning pin 16 is adapted to the positioning groove 12.

[0076] The pull rope 18 is installed on the top of the positioning pin 16.

[0077] In addition, the top of the pull rope 18 passes through the fixed cylinder 15, and the pull rope 18 and the fixed cylinder 15 are in sliding fit.

[0078] The handle 19 is installed on the top of the fixed cylinder 15.

[0079] In this embodiment, the rotary motor 11 drives the output end to rotate the positioning plate 13, the indexing plate 14, and the rotating plate 5 synchronously, so that the extrusion component on the rotating plate 5 is switched to the target station. During the process, the positioning pin 16 of the positioning component always abuts against the surface of the indexing plate 14 under the elastic force of the elastic element 17. When the rotating plate 5 rotates to the preset station, the positioning pin 16 is embedded in the corresponding positioning groove 12, and the rotating plate 5 is locked and positioned through mechanical cooperation. If it needs to be switched again, the handle 19 is pulled to drive the positioning pin 16 to overcome the elastic force of the elastic element 17 and move upward through the pull rope 18, disengaging it from the positioning groove 12 and releasing the lock. The rotary motor 11 can then drive the rotating plate 5 to continue rotating. The rigid cooperation between the indexing plate 14 and the positioning pin 16, combined with the continuous pressure of the elastic element 17, ensures that the positioning pin 16 and the positioning groove 12 are tightly fitted, effectively avoiding station offset caused by vibration and improving the alignment accuracy of the extrusion component and the forming component.

[0080] Example 2:

[0081] Please see Figures 1-5 Based on Example 1, this example provides an extrusion mechanism for pet food production, the specific concept of which is as follows:

[0082] The extrusion mechanism for pet food production also includes: a through hole 20, an extrusion barrel 6, a collar 8, two electric heating rings 7, a support plate 1, two lifting hydraulic rods 2, and a pull rod type linear displacement sensor 10.

[0083] The through hole 20 is located at one end of the rotating plate 5.

[0084] It should be noted that the through hole 20 is coaxially arranged with the fixed cylinder 15, and the diameter of the through hole 20 is slightly larger than the diameter of the fixed cylinder 15.

[0085] The extrusion tank 6 is located on one side of the rotating plate 5.

[0086] The collar 8 is installed on the outer surface of the extrusion barrel 6, and one side of the rotating plate 5 is connected to one side of the collar 8.

[0087] The two electric heating rings 7 are installed on the outer surface of the extrusion barrel 6, and the two electric heating rings 7 are distributed on both sides of the collar 8.

[0088] The support plate 1 is located at the bottom of the support plate 3.

[0089] The two lifting hydraulic rods 2 are installed on both sides of the top of the support plate 1.

[0090] The tie rod type linear displacement sensor 10 is installed on the outside of the cylinder of the lifting hydraulic rod 2.

[0091] It should be noted that the detection end of the lever-type linear displacement sensor 10 is connected to the bottom of the support plate 3, and the lever-type linear displacement sensor 10 is electrically connected to the lifting hydraulic rod 2 through the PLC controller. The extension and retraction of the lifting hydraulic rod 2 is completely synchronized with the lifting height of the extrusion barrel 6. Therefore, the stroke of the lifting hydraulic rod 2 can be directly measured to accurately reflect the position of the extrusion barrel 6. The model of the lever-type linear displacement sensor 10 is BTL6-A110-M0200-P-S32. The lever-type linear displacement sensor 10 detects the position of the extrusion barrel 6 in real time (such as the distance from the current height to the screen box) and transmits the measured value to the PLC through an analog signal. At the same time, the PLC presets two thresholds:

[0092] Deceleration threshold: When the sensor detects that the distance between the extrusion barrel 6 and the screen box is 1-2mm, the PLC sends a signal to the proportional solenoid valve of the hydraulic system to reduce the hydraulic oil flow (reduce the extension and retraction speed of the hydraulic rod).

[0093] Stop threshold: When the target position is reached (e.g., 0.5mm before contact with the screen box), the PLC sends a signal to close the solenoid valve, and the hydraulic rod stops extending and retracting to avoid hard contact.

[0094] In this embodiment, when the rotating plate 5 rotates to switch positions, the through hole 20 provides clearance space for the fixed cylinder 15, ensuring that the rotating plate 5 and the fixed cylinder 15 do not interfere with each other and are coaxial. The coaxial design of the through hole 20 and the fixed cylinder 15 not only ensures smooth rotation of the rotating plate 5, but also improves the centering accuracy during position switching through structural constraints, reducing the risk of mechanical interference. The two electric heating rings 7 are symmetrically distributed on both sides of the collar 8 to uniformly heat the extrusion barrel 6 to optimize the plasticity of the raw material. The symmetrical distribution of the two electric heating rings 7 ensures that the extrusion barrel 6 is heated evenly around the circumference, avoiding local overheating or insufficient heating of the raw material. Gelatinization ensures product quality stability; the lifting hydraulic rod 2 on the support plate 1 provides stable driving force to drive the overall structure to rise and fall. In conjunction with the pull rod type linear displacement sensor 10, the lifting stroke is detected in real time. The sensor transmits the position signal to the PLC in analog form. The PLC adjusts the hydraulic oil flow through the proportional solenoid valve according to the preset deceleration threshold and stop threshold to achieve deceleration and precise stopping of the extrusion barrel 6, avoiding hard contact. The closed-loop control of the pull rod type linear displacement sensor 10 and the PLC not only improves efficiency but also protects the screen box and extrusion barrel 6 from impact damage.

[0095] Working principle:

[0096] In use, the linear displacement sensor 10 detects the extension and retraction of the lifting hydraulic rod 2 in real time (because the extension and retraction of the hydraulic rod is completely synchronized with the lifting height of the extrusion barrel 6), and transmits the displacement signal to the PLC. The PLC controller starts the lifting hydraulic rod 2, and its output end pushes the support plate 3 and the upper structure to descend as a whole, causing the extrusion barrel 6 to move closer to the extrusion screen box below. When the PLC determines that the extrusion barrel 6 is 1-2mm away from the screen box, it controls the lifting hydraulic rod 2 to decelerate to avoid hard contact that could cause deformation of the extrusion barrel 6 or the screen box. After reaching the target position, the hydraulic rod stops extending and retracting, and the extrusion barrel 6 and the screen box are precisely aligned, preparing for the extrusion of raw materials.

[0097] Before extrusion, two electric heating rings 7 are activated to heat the outer surface of the extrusion barrel 6. The heat is conducted to the raw material inside, causing the starch to gelatinize and the protein to denature at high temperature (the temperature is adjusted according to the pet food process requirements), which improves the viscosity and plasticity of the raw material and facilitates subsequent molding. Then, the extrusion component inside the extrusion barrel 6 works to extrude the heated raw material into the extrusion screen box to form pet food of the preset shape.

[0098] When switching between sieve boxes with different aperture sizes, the operator pulls the handle 19 of the positioning component, causing the pull rope 18 to move upward. The pull rope 18 pulls the positioning pin 16 to compress the elastic element 17, causing the positioning pin 16 to disengage from the positioning groove 12 of the indexing plate 14, releasing the lock of the rotating plate 5. The rotating motor 11 is then started, and its output end drives the positioning plate 13, the indexing plate 14, and the rotating plate 5 to rotate synchronously. The rotating plate 5 drives the extrusion barrel 6 to rotate. When it rotates to the target station, the handle 19 is released, and the positioning pin 16, under the restoring force of the elastic element 17, re-engages into the corresponding positioning groove 12 of the indexing plate 14. The precise positioning of the rotating plate 5 is achieved through the cooperation of the positioning pin 16 and the groove, ensuring that the extrusion barrel 6 is aligned with the sieve box of the new station. Then, the lifting and adjusting steps are repeated to extrude pet food of the next aperture size.

[0099] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0100] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An extrusion mechanism for pet food production, comprising a support plate (3) and a support frame (4), characterized in that, The extrusion mechanism for pet food production also includes: An opening (9) is formed inside the support frame (4); A rotary motor (11) is installed on the bottom wall of the opening (9); The rotating plate (5) is located on top of the support frame (4); The output end of the rotary motor (11) passes through the top of the support frame (4) and is bolted to the bottom of the rotating plate (5); A positioning plate (13) is installed at the output end of the rotary motor (11); Indexing plate (14) is installed at the output end of the rotary motor (11); The indexing plate (14) is located on top of the positioning plate (13); Four positioning grooves (12) are provided at the four corners of the indexing plate (14); The positioning element is installed on the top of the support frame (4).

2. The extrusion mechanism for pet food production according to claim 1, characterized in that, The positioning element includes: A fixing cylinder (15) is installed on the top of the support frame (4); An elastic element (17) is located inside the cavity of the fixed cylinder (15); A positioning pin (16) is provided at the bottom of the fixed cylinder (15); The positioning pin (16) is elastically connected to the fixed cylinder (15) through the elastic element (17), and the bottom end of the positioning pin (16) is adapted to the positioning groove (12).

3. The extrusion mechanism for pet food production according to claim 2, characterized in that, The positioning element also includes: A pull cord (18) is installed at the top of the positioning pin (16); The top of the pull rope (18) passes through the fixed cylinder (15), and the pull rope (18) and the fixed cylinder (15) are in sliding fit. A handle (19) is installed on the top of the fixed cylinder (15).

4. The extrusion mechanism for pet food production according to claim 2, characterized in that, The extrusion mechanism for pet food production also includes: A through hole (20) is provided at one end of the rotating plate (5); The through hole (20) is coaxially arranged with the fixed cylinder (15), and the diameter of the through hole (20) is slightly larger than the diameter of the fixed cylinder (15).

5. The extrusion mechanism for pet food production according to claim 1, characterized in that, The extrusion mechanism for pet food production also includes: An extrusion barrel (6) is disposed on one side of the rotating plate (5); A collar (8) is installed on the outer surface of the extrusion barrel (6); One side of the rotating plate (5) is connected to one side of the collar (8).

6. The extrusion mechanism for pet food production according to claim 5, characterized in that, The extrusion mechanism for pet food production also includes: Two electric heating rings (7) are installed on the outer surface of the extrusion barrel (6); The two electric heating rings (7) are distributed on both sides of the collar (8).

7. The extrusion mechanism for pet food production according to claim 1, characterized in that, The extrusion mechanism for pet food production also includes: A support plate (1) is disposed at the bottom of the support plate (3); Two lifting hydraulic rods (2) are installed on both sides of the top of the support plate (1); The output ends of both lifting hydraulic rods (2) are connected to the bottom of the support plate (3).

8. An extrusion mechanism for pet food production according to claim 7, characterized in that, The extrusion mechanism for pet food production also includes: A rod-type linear displacement sensor (10) is installed on the outside of the cylinder of the lifting hydraulic rod (2); The detection end of the pull rod linear displacement sensor (10) is connected to the bottom of the support plate (3), and the pull rod linear displacement sensor (10) is electrically connected to the lifting hydraulic rod (2) through the PLC controller. The extension and retraction of the lifting hydraulic rod (2) is completely synchronized with the lifting height of the extrusion barrel (6), so the stroke of the lifting hydraulic rod (2) can be directly measured to accurately reflect the position of the extrusion barrel (6).

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