A granulator for food processing

Abstract

The present application relates to the technical field of food granulation, in particular to a granulator for food processing, which comprises a material placing cylinder installed on the top surface of a processing table, a granulating part and a discharging disc are coaxially connected through a transmission shaft and are arranged in the lower half of the inner wall of the material placing cylinder; a pressure material group is transversely arranged in the upper half of the material placing cylinder, the pressure material group comprises a pair of pressure rollers suspended above the top surface of the granulating part, a positioning sleeve coaxially connected with the pressure rollers, a positioning tube positioned and inserted with the side wall of the material placing cylinder, and a piezoelectric transducer sleeved in the central hole of the pressure roller; the present application forms a low surface energy characteristic by constructing a tungsten carbide base layer and a nano composite functional layer on the surface of the pressure roller, the surface of the pressure roller is laser engraved with an asymmetric spiral groove, a gas film barrier layer is formed to reduce the contact area of sugar, the low adhesion operation of the contact surface of the pressure roller is realized, and the anti-sticking effect is achieved; the temperature inside the material placing cylinder is reduced by the cooling liquid flowing into the cooling pipe, the constant temperature of the extrusion area of the pressure roller is maintained, and the melting of the sugar is inhibited.

Description

Technical Field

[0001] This invention relates to the field of food granulation technology, specifically to a granulator for food processing. Background Technology

[0002] Pellet mills are widely used in the pharmaceutical, chemical, and food industries. They mainly consist of feeding, pelleting, and transmission systems, and can be divided into feed pellet mills and biomass energy pellet mills.

[0003] Application number CN202411896101.1 discloses a high-efficiency high-temperature mixing and granulation device for traditional Chinese medicinal materials and its granulation method, belonging to the technical field of granulation equipment. It includes a granulator body with a screen connected to it. A knife holder is mounted on the outside of the screen via multiple support legs. Four sets of mounting frames are fixedly connected to the inner wall of the knife holder. Each set of mounting frames is rotatably connected to a second support rod and a first support rod. A first connecting cylinder is fixedly connected to the outside of the first support rod. With the first scraper continuously rotating, the material outside the screen can be continuously scraped off, achieving continuous scraping. Simultaneously, during continuous scraping, the second support rod drives the second connecting cylinder and the second scraper to rotate. In the granulation method, granules are pre-formed through the mesh and scraped off by the scraper, reducing the presence of residue during scraping.

[0004] The aforementioned granulation equipment primarily relies on mechanical scrapers to passively clean material adhering to the screen, which has two major drawbacks: the scrapers can only handle already adhered material and cannot suppress the hot-melt stickiness of high-sugar materials during extrusion, thus only addressing the symptoms, not the root cause; the friction between the metal scraper and the screen generates microparticles, which do not meet food-grade hygiene requirements and pose a risk of secondary contamination. Especially for materials with high sugar content, traditional equipment requires shutdown for cleaning due to sticking rollers, resulting in efficiency losses. Therefore, a granulation technology that addresses the root cause of adhesion is urgently needed. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the present invention aims to provide a granulator for food processing that fundamentally solves the problem of high sugar materials sticking to the rollers through the synergistic effect of a triple active anti-sticking system of roller coating, ultrasonic vibration and cooling to inhibit melting.

[0006] To achieve the above objectives, the present invention provides a food processing granulator, comprising a feeding cylinder installed on the top surface of a processing table, wherein a granulating component and a discharge tray are adaptedly provided on the inner wall of the lower half of the feeding cylinder, the granulating component and the discharge tray are spaced apart and coaxially connected by a drive shaft, a motor is installed at the rear of the processing table, and drives the drive shaft to rotate through a transmission box, thereby driving the granulating component and the discharge tray to rotate synchronously; a discharge port is provided on the bottom front side wall of the feeding cylinder; The upper half of the feeding cylinder is horizontally equipped with a pressing assembly, which includes a pair of pressure rollers suspended above the top surface of the granulation part, a positioning sleeve coaxially sleeved with the pressure rollers, a positioning tube inserted into the side wall of the feeding cylinder, and a piezoelectric transducer sleeved in the center hole of the pressure rollers; the positioning sleeve is sleeved with the inner end of the positioning tube, and a positioning rod for extruding the positioning tube is provided on the outside of the feeding cylinder; a cooling pipe is provided on the outer wall of the feeding cylinder at the middle position for introducing coolant to reduce the temperature of the pressure rollers.

[0007] The above setup aims to fundamentally solve the problem of high-sugar materials melting and adhering to mechanical structures during extrusion. First, the surfaces of the pressure rollers and granulation parts in contact with the material are modified to produce low surface energy, inhibiting sugar adhesion. Then, a composite functional layer forms an air-film barrier layer and reduces the contact area, achieving a dual effect for long-lasting anti-sticking. Next, the environment for extruding the material is kept at a constant temperature to suppress the heat generated during extrusion. Finally, the pressure rollers are positioned to passively roll the material, allowing for the installation of piezoelectric transducers to generate ultrasonic waves for anti-adhesion and easy cleaning. Through this three-stage active control of "anti-sticking - inhibition of sticking - cleaning," the granulation efficiency of high-sugar materials is improved and costs are reduced.

[0008] As a further improvement to this technical solution, the granulation part is a circular block structure with several discharge holes spread on its top surface. A feeding slope is provided at the edge of the top surface of the granulation part. The surface of the granulation part is coated with a tungsten carbide wear-resistant base layer with a thickness of 0.2-0.5 mm and a polyether ether ketone-fluoropolymer nanocomposite functional layer.

[0009] As a further improvement to this technical solution, a material-pushing plate is slidably connected to the top surface of the discharge plate, the material-pushing plate is fixedly connected to the side wall of the material-feeding cylinder, and a material guide plate is fixedly connected to the outside of the discharge port of the material-feeding cylinder.

[0010] As a further improvement to this technical solution, the surface of the pressure roller is coated with a tungsten carbide wear-resistant base layer with a thickness of 0.2-0.5 mm and a polyether ether ketone-fluoropolymer nanocomposite functional layer, wherein the fluoropolymer accounts for 25%-35% by mass, and the surface is distributed with grooves with a depth of 10-30 μm and a width of 20-50 μm.

[0011] The above setup utilizes a tungsten carbide wear-resistant base layer to provide high-strength support and resist material extrusion and wear; the composite functional layer uses low surface energy characteristics to inhibit sugar adhesion, and surface grooves are used to form an air film barrier layer and reduce the contact area, achieving a durable anti-sticking effect through dual action.

[0012] As a further improvement to this technical solution, a connecting shaft is sleeved between the two piezoelectric transducers, the positioning sleeve is also sleeved and fitted with the piezoelectric transducer, and a bearing is sleeved on the outer wall of the positioning sleeve, and the inner wall of the pressure roller is tightly sleeved with the outer ring of the bearing.

[0013] As a further improvement to this technical solution, the positioning tube is threadedly connected to the positioning sleeve, the outer end of the positioning tube is provided with a positioning head, the positioning head is a polygonal prism structure, the outer wall of the material cylinder is fixedly connected with an outer ring, the positioning rod is threadedly connected to a threaded hole provided on the top surface of the outer ring, and the bottom end of the positioning rod is in contact with and pressed against the side plane of the positioning head.

[0014] These two settings enable the piezoelectric transducer to be powered by an external power source. A pair of positioning tubes, a pair of positioning sleeves, and a connecting shaft work together to provide coaxial support, allowing the piezoelectric transducer's wires to pass through the inner holes of the positioning sleeves and positioning tubes to connect to the external circuit and operate.

[0015] As a further improvement to this technical solution, the middle sidewall of the material feeding cylinder is symmetrically provided with through holes, and the positioning tube is appropriately connected to the through holes.

[0016] As a further improvement to this technical solution, the outer diameter of the bearing is larger than the outer diameter of the piezoelectric transducer, and the outer wall of the connecting shaft is symmetrically fitted with sealing rings, and the sealing rings are rotatably sleeved with one end of the inner hole of the pressure roller, and the other end of the inner hole of the pressure roller is fixedly connected with a sealing cover, and the sealing cover is rotatably sleeved with the positioning tube.

[0017] As a further improvement to this technical solution, the cooling pipe is spirally sleeved on the outer wall of the feeding cylinder. One end of the cooling pipe is connected to a liquid pump, and the suction end of the liquid pump is connected to a cooling box. The other end of the cooling pipe is connected to the condenser pipe of the compressor. A return pipe is connected between the compressor and the cooling box.

[0018] As a further improvement to this technical solution, the top end of the drive shaft is threaded with a ring seat, and the ring seat is located on the top surface of the granulation part and tightly fitted onto the protective cover.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This food processing granulator forms a low surface energy characteristic by constructing a tungsten carbide base layer and a nano-composite functional layer on the surface of the pressure roller. The surface is laser-engraved with asymmetric spiral grooves to form an air film barrier layer, which reduces the contact area of ​​sugar and achieves low adhesion operation of the pressure roller contact surface, thus achieving an anti-sticking effect.

[0020] 2. This food processing granulator uses ultrasonic and mechanical dynamic coupling to control the piezoelectric transducer to adjust the ultrasonic frequency in real time, thereby removing potential sticky residues.

[0021] 3. This food processing granulator lowers the internal temperature of the feeding cylinder by introducing coolant into the spiral cooling pipe, thus keeping the pressure roller and granulation parts in a cooled environment, maintaining a constant temperature in the extrusion zone, and inhibiting sugar melting.

[0022] 4. This food processing granulator features a modular quick-release design for the positioning tube and pressure roller, and uses a polygonal prism positioning head and threaded rod for locking, which shortens the pressure roller replacement time compared to traditional equipment and improves the pressure roller cleaning efficiency. Attached Figure Description

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, will select various possible shapes and proportions to implement the invention according to specific circumstances.

[0024] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention; Figure 2 This is a schematic diagram of a partial assembly structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the internal assembly structure; Figure 4 This is a schematic diagram of the assembly structure of the cooling box and compressor of the present invention; Figure 5 This is a schematic diagram of the transmission shaft assembly structure of the present invention; Figure 6 This is a full sectional view of the material feeding cylinder of the present invention; Figure 7 This is a schematic diagram of the granulation component structure of the present invention; Figure 8 This is a partial exploded view of the pressing assembly of the present invention; Figure 9 This is a schematic diagram of the assembly structure of the positioning sleeve and positioning tube of the present invention; The meanings of the labels in the diagram are as follows: 100. Processing table; 110. Feeding cylinder; 111. Through hole; 120. Motor; 121. Transmission box; 130. Guide plate; 140. Cooling box; 150. Liquid pump; 151. Cooling pipe; 160. Compressor; 161. Return pipe; 200. Granulation component; 201. Discharge hole; 202. Feeding slope; 210. Drive shaft; 220. Discharge plate; 230. Feeding disc; 240. Protective cover; 300, pressing assembly; 310, pressure roller; 311, sealing cover; 320, positioning sleeve; 321, connecting shaft; 322, sealing ring; 330, positioning tube; 331, positioning head; 332, positioning rod; 340, piezoelectric transducer; 350, bearing. Detailed Implementation

[0025] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art will conceive of any possible variations of the invention, all of which should be considered within the scope of the invention. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection as well as indirect connection through an intermediate medium.

[0026] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0027] Please see Figures 1-7 As shown, the present invention provides a food processing pelletizer, including a feeding cylinder 110 installed on the top surface of a processing table 100. The lower half of the inner wall of the feeding cylinder 110 is fitted with a pelletizing element 200 and a discharge plate 220. The pelletizing element 200 has a circular block structure and its top surface is covered with a plurality of discharge holes 201. The pelletizing element 200 and the discharge plate 220 are spaced apart and coaxially connected by a drive shaft 210. A motor 120 is installed at the rear of the processing table 100 and drives the drive shaft 210 to rotate through a transmission box 121. The transmission box 121 uses a worm gear and a worm to transmit the driving force of the output shaft of the motor 120 to the drive shaft 210. This is prior art and will not be described in detail here. This drives the pelletizing element 200 and the discharge plate 220 to rotate synchronously. The bottom front side wall of the feeding cylinder 110 has a discharge port for discharging materials.

[0028] Furthermore, to reduce material adhesion to the surface of the pelletizing part 200, a feeding ramp 202 is provided at the top edge of the pelletizing part 200 to guide the material to slide to the discharge hole 201 and be squeezed out. The surface of the pelletizing part 200 is coated with a tungsten carbide wear-resistant base layer with a thickness of 0.2-0.5 mm and a polyetheretherketone-fluoropolymer nanocomposite functional layer. This base layer provides high-strength support and resists material compression and wear. This composite functional layer inhibits sugar adhesion through its low surface energy characteristics. The top end of the drive shaft 210 is threaded with a ring seat, which is located on the top surface of the pelletizing part 200 and tightly fitted onto the cover 240. The ring seat presses down on the pelletizing part 200, and the cover 240 provides protection, preventing material from accumulating in the gap between the drive shaft 210 and the ring seat.

[0029] Furthermore, a material-pushing plate 230 is slidably connected to the top surface of the discharge plate 220. The material-pushing plate 230 is fixedly connected to the side wall of the material storage cylinder 110. The length of the material-pushing plate 230 is greater than the radius of the discharge plate 220. As the discharge plate 220 rotates, the material is driven to the stationary material-pushing plate 230 and discharged towards the discharge port. A guide plate 130 is fixedly connected to the outside of the discharge port of the material storage cylinder 110 to guide the discharge direction of the material so that it can be collected smoothly.

[0030] Specifically, since materials with high sugar content are prone to melting when heated during extrusion and discharge, a cooling pipe 151 is installed on the outer wall of the feeding cylinder 110, located in the middle, to allow coolant to flow through and cool the inside of the feeding cylinder 110, preventing the sugary materials from melting and sticking together during granulation. The cooling pipe 151 is spirally fitted onto the outer wall of the feeding cylinder 110. One end of the cooling pipe 151 is connected to a liquid pump 150, and the suction end of the liquid pump 150 is connected to a cooling box 140. The other end of the cooling pipe 151 is connected to the condenser pipe of the compressor 160, and a return pipe 161 connects the compressor 160 and the cooling box 140. A temperature sensor is embedded in the inner wall of the feeding cylinder 110 to monitor its internal temperature, and the feedback control system triggers the liquid pump 150 to pump out the amount and speed of coolant, thereby controlling the cooling effect.

[0031] like Figure 8 and Figure 9 As shown, in order to further prevent material adhesion and facilitate cleaning, a pressing assembly 300 is horizontally placed in the upper half of the feeding cylinder 110. The rotating granulator 200 drives the material to be squeezed and granulated by the pressing assembly 300. The pressing assembly 300 includes a pair of pressure rollers 310 suspended above the top surface of the granulator 200, a positioning sleeve 320 coaxially sleeved with the pressure rollers 310, a positioning tube 330 positioned and inserted into the side wall of the feeding cylinder 110, and a piezoelectric transducer 340 sleeved in the center hole of the pressure rollers 310, which is used to generate ultrasonic assistance to prevent material from sticking to the pressure rollers 310. The ultrasonic operating frequency f (Hz) of the piezoelectric transducer 340 and the rotational speed n (rpm) of the pressure roller 310 satisfy the following: f = (n÷60)×k; where k is the wavelength-speed matching coefficient, ranging from 1150 to 1250; and "60" is the unit conversion factor, converting the speed unit from rpm to rps (revolutions per second). The pressure roller 310 is driven by the granulation part 200 and the material to form a speed n. By converting the unit n / 60, the rotational frequency is obtained. Multiplying this by the matching coefficient k yields the output ultrasonic frequency f, which generates ultrasonic assistance to prevent material from sticking to the pressure roller 310 and to clean material from gaps.

[0032] Furthermore, the positioning sleeve 320 is sleeved with the inner end of the positioning tube 330, and the outer side of the material cylinder 110 is provided with a positioning rod 332 for extruding the positioning tube 330, which is used to position the pressure roller 310 and prevent the pressure roller 310 from sliding axially, so that it can stably press the material on the granulation part 200; wherein, the cooling pipe 151 is filled with cooling liquid to reduce the temperature of the pressure roller 310, and prevent the pressure roller 310 from continuously generating high heat due to friction with the material, which would cause the sugar-containing material to melt and form a sticky state.

[0033] Specifically, the surface of the pressure roller 310 is coated with a tungsten carbide wear-resistant base layer with a thickness of 0.2-0.5 mm, and a polyether ether ketone-fluoropolymer nanocomposite functional layer. This base layer provides high-strength support and resists material extrusion and wear. The fluoropolymer accounts for 25%-35% of the mass, and the fluoropolymer is polytetrafluoroethylene particles with a particle size of 50-100 nm, formed by gradient plasma sintering, with the sintering temperature decreasing from 400℃ to 280℃ in steps. The surface of this functional layer is distributed with grooves with a depth of 10-30 μm and a width of 20-50 μm. These grooves are distributed in an asymmetric spiral gradient, with the spiral angle linearly changing from 15° to 45° along the axial direction of the pressure roller 310. This composite functional layer inhibits sugar adhesion through its low surface energy characteristics, and the surface grooves are used to form an air film barrier layer and reduce the contact area, achieving a durable anti-sticking effect through a dual action.

[0034] Furthermore, a connecting shaft 321 is sleeved between the two piezoelectric transducers 340, and a positioning sleeve 320 is also sleeved and fitted with the piezoelectric transducer 340. A bearing 350 is sleeved on the outer wall of the positioning sleeve 320, and the inner wall of the pressure roller 310 is tightly sleeved with the outer ring of the bearing 350, so that the pressure roller 310 can rotate freely. A pair of positioning tubes 330, a pair of positioning sleeves 320 and the connecting shaft 321 together play a coaxial support role, so that the wires of the piezoelectric transducer 340 pass through the inner holes of the positioning sleeves 320 and the positioning tubes 330 to connect to the external circuit and work.

[0035] The middle side wall of the feeding cylinder 110 is symmetrically provided with through holes 111, and the positioning tube 330 is adapted to be connected to the through holes 111. The positioning tube 330 is threadedly connected to the positioning sleeve 320. The outer end of the positioning tube 330 is provided with a positioning head 331. The positioning head 331 is a polygonal prism structure. An outer ring is fixedly connected to the outer wall of the feeding cylinder 110. The positioning rod 332 is threadedly connected to the threaded hole provided on the top surface of the outer ring. The bottom end of the positioning rod 332 contacts and presses against the side plane of the positioning head 331, so that the positioning tube 330 is not loosened due to the vibration of the granulation part 200 rotating.

[0036] The outer diameter of the bearing 350 is larger than that of the piezoelectric transducer 340 to prevent it from being touched by the rotation of the pressure roller 310. The outer wall of the connecting shaft 321 is symmetrically fitted with sealing rings 322, and the sealing rings 322 are rotatably sleeved with one end of the inner hole of the pressure roller 310. The other end of the inner hole of the pressure roller 310 is fixedly connected with a sealing cover 311, and the sealing cover 311 is rotatably sleeved with the positioning tube 330 to prevent material from entering the two ends of the pressure roller 310 and facilitate subsequent cleaning.

[0037] When the food processing pelletizer of the present invention is in use, the material is poured into the upper part of the feeding cylinder 110, and then the motor 120 is started to drive the transmission shaft 210 to rotate, which drives the pelletizing part 200 and the discharge plate 220 to rotate synchronously. The material is squeezed into the discharge hole to form granules by the relative movement between the material and the pressure roller 310, and falls onto the discharge plate 220 to rotate due to centrifugal force. Then it is driven out of the discharge port by the feeding plate 230.

[0038] During this process, a temperature sensor is embedded in the inner wall of the feeding cylinder 110 to monitor its internal temperature. The feedback control system triggers the liquid pump 150 to pump out coolant, which flows through the cooling pipe 151 around the outer wall of the feeding cylinder 110 to generate a lasting cooling effect, thus reducing the heat inside the feeding cylinder 110. At the same time, the pressure roller 310 is driven by the granulation part 200 and the material to form a rotational speed n. By converting the unit n / 60, the rotational frequency is obtained. Multiplying this by the matching coefficient k, the output ultrasonic frequency f is obtained, which generates ultrasonic assistance to prevent the pressure roller 310 from sticking to the material. The coating on the surface of the pressure roller 310 inhibits sugar adhesion through its low surface energy characteristics, thereby achieving multiple inhibitions of melting caused by extrusion molding of high-sugar materials, fundamentally solving the problems of material extrusion discharge and subsequent inconvenience in cleaning.

[0039] It should be noted that the fixed connections and fixing methods of the present invention are achieved using conventional fixing means such as bolt connections or welding. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A granulator for food processing, comprising a feeding cylinder mounted on the top surface of a processing table, wherein a granulating element and a discharge tray are adaptedly provided on the inner wall of the lower half of the feeding cylinder, the granulating element and the discharge tray are spaced apart and coaxially connected by a drive shaft, a motor is mounted at the rear of the processing table, and drives the drive shaft to rotate through a transmission box, thereby driving the granulating element and the discharge tray to rotate synchronously; a discharge port is provided on the bottom front side wall of the feeding cylinder; Its features are: The upper half of the feeding cylinder is horizontally equipped with a pressing assembly, which includes a pair of pressure rollers suspended above the top surface of the granulation part, a positioning sleeve coaxially sleeved with the pressure rollers, a positioning tube inserted into the side wall of the feeding cylinder, and a piezoelectric transducer sleeved in the center hole of the pressure rollers; the positioning sleeve is sleeved with the inner end of the positioning tube, and a positioning rod for extruding the positioning tube is provided on the outside of the feeding cylinder; a cooling pipe is provided on the outer wall of the feeding cylinder at the middle position for introducing coolant to reduce the temperature of the pressure rollers; A connecting shaft is sleeved between the two piezoelectric transducers, and the positioning sleeve is also sleeved with the piezoelectric transducer. A bearing is sleeved on the outer wall of the positioning sleeve, and the inner wall of the pressure roller is tightly sleeved with the outer ring of the bearing. The ultrasonic operating frequency f of the piezoelectric transducer and the rotational speed n of the pressure roller satisfy the following: f = (n÷60)×k; where k is the wavelength-speed matching coefficient, with a value range of 1150 ~ 1250; where "60" is the unit conversion factor, f is in Hz, n is in rpm, converting the speed unit from rpm to rps; The granulation part is a circular block structure with several discharge holes on its top surface. The top edge of the granulation part is provided with a feeding slope. The surface of the granulation part is coated with a tungsten carbide wear-resistant base layer with a thickness of 0.2-0.5 mm and a polyether ether ketone-fluoropolymer nanocomposite functional layer. The surface of the pressure roller is coated with a tungsten carbide wear-resistant base layer with a thickness of 0.2-0.5 mm, and a polyether ether ketone-fluoropolymer nanocomposite functional layer, wherein the fluoropolymer accounts for 25%-35% by mass, and the surface is distributed with grooves with a depth of 10-30 μm and a width of 20-50 μm. The positioning tube is threadedly connected to the positioning sleeve. The outer end of the positioning tube is provided with a positioning head. The positioning head is a polygonal prism structure. An outer ring is fixedly connected to the outer wall of the material cylinder. The positioning rod is threadedly connected to the threaded hole provided on the top surface of the outer ring. The bottom end of the positioning rod contacts and is pressed against the side plane of the positioning head. The middle side wall of the feeding cylinder is symmetrically provided with through holes, and the positioning tube is appropriately connected to the through holes; The outer diameter of the bearing is larger than the outer diameter of the piezoelectric transducer. The outer wall of the connecting shaft is symmetrically fitted with sealing rings, and the sealing rings are rotatably sleeved with one end of the inner hole of the pressure roller. The other end of the inner hole of the pressure roller is fixedly connected with a sealing cover, and the sealing cover is rotatably sleeved with the positioning tube. The cooling pipe is spirally sleeved on the outer wall of the feeding cylinder. One end of the cooling pipe is connected to a liquid pump, and the suction end of the liquid pump is connected to a cooling box. The other end of the cooling pipe is connected to the condenser pipe of the compressor. A return pipe is connected between the compressor and the cooling box.

2. The food processing granulator according to claim 1, characterized in that: A material-pushing plate is slidably connected to the top surface of the discharge plate. The material-pushing plate is fixedly connected to the side wall of the material cylinder. A guide plate is fixedly connected to the outside of the discharge port of the material cylinder.

3. The food processing granulator according to claim 2, characterized in that: The top end of the drive shaft is threaded with a ring seat, which is located on the top surface of the granulation part and tightly fitted onto the protective cover.

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