Granulator for uniform pelletizing

Abstract

The utility model discloses a granulator that cuts grains uniformly, which comprises a rack, a shell, a speed reducer, an auger, a discharging module and a grain cutting module. The auger is installed in the shell. The discharging module is installed on the output section of the shell. One end of the auger, which is away from the discharging module, extends to the outside of the shell and is connected to the drive shaft of the speed reducer. The auger comprises a rotating shaft and a spiral blade. One end of the rotating shaft is accommodated in the shell, and the other end extends to the outside of the shell and is connected to the drive shaft of the speed reducer. The spiral blade is arranged on the side surface of the rotating shaft. The rotating shaft is provided with a transmission part and a conveying part. The conveying part is arranged in the shell and is connected to the spiral blade. The diameter of the conveying part increases at a preset amplitude along the direction towards the output end of the shell. When the material is conveyed towards the discharging module under the push of the spiral blade, the conveying pressure and the conveying speed of the material are synchronously improved with the increase of the diameter of the conveying part, and the extrusion speed of the material in the discharging module is improved.

Description

Technical Field

[0001] This utility model relates to the field of granulator technology, and in particular to a granulator with uniform pelletizing. Background Technology

[0002] A granulator is a mechanical device that processes powdered, molten, or granular raw materials into particles of specific shapes and sizes using physical or chemical methods. It is widely used in chemical, pharmaceutical, food, plastics, agriculture, and environmental protection industries, and is an important piece of equipment in industrial production for standardizing material forms and facilitating storage, transportation, and use. The core process of granulation is to transform loose or liquid raw materials into uniform particles through external force (such as extrusion, cutting, rolling, spray drying, etc.). The specific principles vary depending on the type of equipment. Common methods include melt extrusion granulation: molten material (such as plastic) is extruded into strips through a die, and then cut into granules by a rotary cutter; dry roller pressing granulation: powder is pressed into flakes or blocks by rollers, and then crushed into granules; wet agglomeration granulation: liquid binder is sprayed onto powder, and granules are formed by rolling or stirring; spray drying granulation: liquid material is atomized and then rapidly dried into spherical granules in hot air. Based on the above-mentioned granulation methods, existing granulators include extrusion granulators, rotary granulators, fluidized bed granulators, double-roll extrusion granulators, and spray granulators, etc., to cope with different materials and different working conditions in the production process.

[0003] For polymer materials such as plastics, rubber, and chemical fibers, extrusion granulators are often used for production. However, for the granulation of high-viscosity materials, the insufficient extrusion speed makes it difficult for the cutter speed to synchronize with the extrusion speed, resulting in uneven pelleting. Utility Model Content

[0004] Therefore, it is necessary to provide a pelletizer with uniform pelletizing to address the technical problem of uneven pelletizing in existing extrusion pelletizers.

[0005] A pelletizer for uniform pelletizing includes a frame, a housing, a reducer, an auger, a discharge module, and a pelletizing module. The housing and the reducer are both mounted on the top of the frame. The auger is installed inside the housing. The discharge module is installed in the output section of the housing. One end of the auger facing away from the discharge module extends to the outside of the housing and is connected to the drive shaft of the reducer, so that the reducer can drive the auger to rotate relative to the housing.

[0006] The auger includes a shaft and helical blades; one end of the shaft is housed inside the housing, and the other end extends outside the housing and is connected to the drive shaft of the reducer; the helical blades are housed inside the housing and are disposed on the side surface of the shaft.

[0007] The rotating shaft is equipped with a transmission part and a conveying part, which are respectively located at both ends of the rotating shaft. The conveying part is located inside the housing and connected to the spiral blades, while the transmission part extends to the outside of the housing and is connected to the drive shaft of the reducer. The diameter of the conveying part increases by a preset amount in the direction toward the output end of the housing, thereby forming a frustum-shaped structure.

[0008] In one embodiment, the arrangement density of the aforementioned spiral blades increases by a predetermined amount along the direction toward the output end of the housing, thereby making the spiral blades gradually denser along the material conveying direction.

[0009] In one embodiment, the pelletizing module includes a cover, a cutter, and a servo motor. The cover, in conjunction with the discharge module, is installed on the output end of the housing. The cutter is rotatably connected to the cover and abuts against the discharge module. The servo motor is located on the adjacent side of the cover, and its output end drives the cutter.

[0010] In one embodiment, the above-mentioned discharge module includes a discharge orifice plate and a pressure plate, which are sequentially connected to the output end of the housing.

[0011] In one embodiment, the aforementioned conveying section passes through and engages with the discharge module at one end, sequentially reaching the geometric center of the discharge orifice plate and the pressure plate.

[0012] In one embodiment, a bushing is fitted between the corresponding end of the conveying section and the discharge orifice plate and the pressure plate.

[0013] In one embodiment, the above-mentioned discharge plate is provided with a plurality of discharge holes of preset size.

[0014] In one embodiment, the pressure plate is provided with a plurality of clearance holes. When the pressure plate abuts against the surface of the discharge hole plate, the plurality of clearance holes correspond one-to-one with the plurality of discharge holes.

[0015] In one embodiment, the aforementioned discharge holes are configured as an array of equidistant through holes to ensure the uniformity of material extrusion.

[0016] In one embodiment, the ratio of the distance between the two discharge holes to the hole diameter is 1:3 to 1:1.

[0017] In one embodiment, the ratio of the distance between the two discharge holes to the hole diameter can be set to 1:3, 2:3, or 1:1.

[0018] In one embodiment, the aforementioned housing is configured as a jacket structure, with the inner sidewall surface of the jacket structure engaging with the outer edge of the helical blade; the interior of the jacket structure can be circulated with high-temperature or low-temperature heat exchange fluid.

[0019] In one embodiment, the housing is further provided with a feed hopper, which is located at the end of the housing facing the reducer, and the bottom end of the feed hopper is connected to the interior of the housing.

[0020] In one embodiment, the aforementioned reducer is further connected to a coupling, which is disposed between the drive shaft of the reducer and the end of the transmission part. The drive shaft of the reducer can be driven and connected to the auger via the coupling.

[0021] In one embodiment, a first bearing is provided between the transmission part and the corresponding end wall of the housing, and the transmission part is rotatably connected to the housing through the first bearing.

[0022] In one embodiment, the first bearing is stably mounted on the corresponding end wall of the housing via a first bearing housing.

[0023] In one embodiment, the transmission part is further provided with a second bearing, which is disposed between the first bearing and the coupling and sleeved on the side surface of the transmission part.

[0024] In one embodiment, the aforementioned second bearing is connected to one end wall of the housing via a second bearing housing.

[0025] The aforementioned uniformly pelletizing granulator has a rotating shaft equipped with a transmission section and a conveying section, which are respectively located at both ends of the rotating shaft. The conveying section is located inside the housing and connected to the spiral blades, while the transmission section extends to the outside of the housing and is connected to the drive shaft of the reducer. The diameter of the conveying section increases by a preset margin in the direction towards the output end of the housing, thereby forming a frustum-shaped structure. Thus, when the material is conveyed towards the discharge module under the push of the spiral blades, the conveying pressure and conveying speed of the material increase simultaneously as the diameter of the conveying section increases. This promotes thorough mixing of the material and greatly increases the extrusion speed of the material in the discharge module. In conjunction with the high-speed rotating blades of the pelletizing module, the material can be quickly pelletized, reducing particle adhesion and improving particle uniformity. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a pelletizer that produces uniformly granulated pellets in one embodiment. Figure 2 for Figure 1 A schematic diagram of the granulator with uniform pelletizing in the illustrated embodiment from another perspective; Figure 3 for Figure 2 A schematic cross-sectional view of part AA in the illustrated embodiment; Figure 4 This is an exploded structural diagram of a pelletizer that produces uniformly sized pellets in one embodiment. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Please see Figures 1 to 4This utility model discloses a pelletizer 1 with uniform pelletizing capability. The pelletizer 1 includes a frame 10, a housing 20, a reducer 30, an auger 40, a discharge module 50, and a pelletizing module 60. The housing 20 and the reducer 30 are both mounted on the top of the frame 10. The auger 40 is installed inside the housing 20. The discharge module 50 is installed in the output section of the housing 20. One end of the auger 40 facing away from the discharge module 50 extends to the outside of the housing 20 and is connected to the drive shaft of the reducer 30. Thus, the reducer 30 can drive the auger 40 to rotate relative to the housing 20. In practical applications, it can push and mix materials, and simultaneously complete extrusion molding through the discharge module 50. The pelletizing module 60 is installed in the output section of the housing 20 in conjunction with the discharge module 50. After the material is extruded, the pelletizing module 60 pelletizes the shaped material to obtain pellets of a preset size. Based on the above configuration, specifically, the auger 40 includes a rotating shaft 41 and helical blades 42; one end of the rotating shaft 41 is housed inside the housing 20, and the other end extends to the outside of the housing 20 and is connected to the drive shaft of the reducer 30; the helical blades 42 are housed inside the housing 20 and are disposed on the side surface of the rotating shaft 41, thereby causing the reducer 30 to drive the rotating shaft 41 to rotate the helical blades 42, so as to achieve mixing, conveying and extruding of materials; more specifically, the rotating shaft 41 is provided with a transmission part 411 and a conveying part 412, which are respectively disposed at both ends of the rotating shaft 41, and the conveying part 412 is disposed inside the housing 20 and... The transmission part 411 extends to the outside of the housing 20 and is connected to the drive shaft of the reducer 30, connected to the spiral blade 42. The diameter of the conveying part 412 increases by a preset amount in the direction toward the output end of the housing 20, thereby forming a frustum-shaped structure. Thus, when the material is conveyed toward the discharge module 50 by the spiral blade 42, the conveying pressure and conveying speed of the material increase simultaneously as the diameter of the conveying part 412 increases. This promotes full mixing of the material and greatly increases the extrusion speed of the material in the discharge module 50. In addition, the high-speed rotating blades of the pelletizing module 60 can quickly pelletize the material, reduce particle adhesion, and improve the uniformity of the particles.

[0034] Furthermore, the arrangement density of the spiral blades 42 increases by a preset amount in the direction toward the output end of the housing 20, thereby making the spiral blades 42 gradually denser along the material conveying direction, thereby further increasing the conveying pressure and extrusion speed together with the conveying section 412, and further improving the pelleting uniformity of the material.

[0035] Furthermore, the pelletizing module 60 includes a cover 61, a cutter (not shown), and a servo motor 62. The cover 61, in conjunction with the discharge module 50, covers the output end of the housing 20. The cutter is rotatably connected to the cover 61 and abuts against the discharge module 50. The servo motor 62 is located adjacent to the cover 61, and its output end drives the cutter, enabling the servo motor 62 to drive the cutter to quickly pelletize the material output from the discharge module 50. In practical applications, the controller monitors the cutter speed and the auger speed in real time, and dynamically adjusts the cutter speed and the auger speed based on the discharge situation of the discharge module 50, which can further improve the consistency of the pellet length.

[0036] Furthermore, the discharge module 50 includes a discharge orifice plate 51 and a pressure plate 52, which are sequentially connected to the output end of the housing 20, so that the mixed material can be sequentially discharged through the discharge orifice plate 51 and the pressure plate 52. Specifically, the end of the conveying section 412 facing the discharge module 50 sequentially penetrates and engages with the geometric center of the discharge orifice plate 51 and the pressure plate 52, thereby ensuring the complete material conveying process of the conveying section 412. In one embodiment, a bushing is sleeved between the corresponding end of the conveying section 412 and the discharge orifice plate 51 and the pressure plate 52 to allow unobstructed rotation between the conveying section 412 and the discharge orifice plate 51 and the pressure plate 52.

[0037] Furthermore, the discharge plate 51 is provided with a number of discharge holes d of a preset size for extruding material particles of a preset diameter; correspondingly, the pressure plate 52 is provided with a number of clearance holes e. When the pressure plate 52 abuts against the surface of the discharge plate 51, the number of clearance holes e respectively correspond to the number of discharge holes one by one, thereby ensuring the smoothness of the material extrusion process.

[0038] In one embodiment, specifically, a plurality of discharge holes d are configured as an array of equidistant through holes to ensure the uniformity of material extrusion. In another embodiment, more specifically, the ratio of the spacing between two discharge holes d to their diameter is 1:3 to 1:1. In some embodiments, the ratio of the spacing between two discharge holes to their diameter can be set to 1:3, 2:3, or 1:1.

[0039] In one embodiment, the housing 20 is further configured as a jacket structure, with the inner wall surface of the jacket structure abutting against the outer edge of the spiral blade 42 to ensure sufficient mixing and conveying efficiency of the material; high-temperature or low-temperature heat exchange fluid can be introduced into the interior of the jacket structure to heat or cool the material inside the housing 20. In one embodiment, the housing 20 is further provided with a feed hopper 21, which is located at one end of the housing 20 facing the reducer 30, and the bottom end of the feed hopper 21 is connected to the interior of the housing 20, so that the housing 20 can input materials through the feed hopper 21.

[0040] In one embodiment, the reducer 30 is further connected to a coupling 31, which is disposed between the drive shaft of the reducer 30 and the end of the transmission part 411, so that the drive shaft of the reducer 30 can be drivenly connected to the auger 40 through the coupling 31.

[0041] In one embodiment, a first bearing 22 is further provided between the transmission part 411 and the corresponding end wall of the housing 20, and the transmission part 411 is rotatably connected to the housing 20 through the first bearing 22. In another embodiment, specifically, the first bearing 22 is stably mounted on the corresponding end wall of the housing 20 through a first bearing seat 23.

[0042] In one embodiment, the transmission part 411 is further provided with a second bearing 24, which is disposed between the first bearing 22 and the coupling 31 and sleeved on the side surface of the transmission part 411; and the second bearing 24 is connected to one end wall of the housing 20 through a second bearing seat 25, thereby further improving the installation stability of the transmission part 411 relative to the housing 20 and the reducer 30.

[0043] In summary, the pelletizer with uniform pelletizing disclosed in this utility model has a drive unit and a conveying unit on the rotating shaft. The drive unit and the conveying unit are respectively located at both ends of the rotating shaft. The conveying unit is located inside the housing and connected to the spiral blades, while the drive unit extends to the outside of the housing and is connected to the drive shaft of the reducer. The diameter of the conveying unit increases by a preset amount in the direction towards the output end of the housing, thereby forming a frustum-shaped structure. Thus, when the material is conveyed towards the discharge module under the push of the spiral blades, the conveying pressure and conveying speed of the material increase simultaneously as the diameter of the conveying unit increases. This promotes thorough mixing of the material and greatly increases the extrusion speed of the material in the discharge module. In addition, the high-speed rotating blades of the pelletizing module can quickly pelletize the material, reduce particle adhesion, and improve the uniformity of the particles.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pelletizing machine for uniform pelletizing, characterized in that, include: The machine includes a frame, housing, reducer, auger, discharge module, and pelletizing module. The housing and reducer are all mounted on top of the frame. The auger is installed inside the housing; the discharge module is installed in the output section of the housing; the end of the auger facing away from the discharge module extends to the outside of the housing and is connected to the drive shaft of the reducer, so that the reducer can drive the auger to rotate relative to the housing; The auger includes a shaft and helical blades; one end of the shaft is housed inside the housing, and the other end extends outside the housing and is connected to the drive shaft of the reducer; the helical blades are housed inside the housing and are disposed on the side surface of the shaft. The rotating shaft is equipped with a transmission part and a conveying part, which are respectively located at both ends of the rotating shaft. The conveying part is located inside the housing and connected to the spiral blades, while the transmission part extends to the outside of the housing and is connected to the drive shaft of the reducer. The diameter of the conveying part increases by a preset amount in the direction toward the output end of the housing, thereby forming a frustum-shaped structure.

2. The pelletizing machine with uniform pelletizing according to claim 1, characterized in that, The arrangement density of the spiral blades increases by a preset amount in the direction toward the output end of the shell, thereby making the spiral blades gradually denser along the material conveying direction.

3. The pelletizer with uniform pelletizing according to claim 2, characterized in that, The pelletizing module includes a cover, a cutter, and a servo motor. The cover, together with the discharge module, is installed on the output end of the housing. The cutter is rotatably connected to the cover and abuts against the discharge module. The servo motor is located on the adjacent side of the cover, and the output end of the servo motor drives the cutter.

4. The pelletizing machine with uniform pelletizing according to claim 3, characterized in that, The discharge module includes a discharge orifice plate and a pressure plate, which are sequentially connected to the output end of the housing.

5. The pelletizer with uniform pelletizing according to claim 4, characterized in that, The end of the conveying unit facing the discharge module passes through and fits into the geometric center of the discharge orifice plate and the pressure plate in sequence.

6. The pelletizing machine with uniform pelletizing according to claim 5, characterized in that, A bushing is fitted between the corresponding end of the conveying section and the discharge orifice plate and pressure plate.

7. The pelletizer with uniform pelletizing according to claim 6, characterized in that, The discharge plate is equipped with several discharge holes of preset sizes.

8. The pelletizer with uniform pelletizing according to claim 7, characterized in that, The pressure plate is provided with several clearance holes. When the pressure plate abuts against the surface of the discharge hole plate, the clearance holes correspond to the discharge holes one by one.

9. The pelletizing machine with uniform pelletizing according to claim 8, characterized in that, Several discharge holes are set as an array of equidistant through holes to ensure the uniformity of material extrusion.

10. The pelletizing machine with uniform pelletizing according to claim 9, characterized in that, The ratio of the distance between the two discharge holes to the hole diameter is 1:3 to 1:1.

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