A pellet mill

Abstract

This utility model discloses a pelletizing machine, comprising: a pot body, a pot lid, a blade assembly, a controller, a guide plate, and a pressure plate; the pot body has an internal cavity for accommodating the blade assembly and chemical fiber materials, with an opening at the upper end of the cavity; the pot lid is positioned over the opening and above the pressure plate; the blade assembly includes a moving blade disc, a motor, and fixed blades, with the moving blade disc centrally located in the cavity, the motor positioned below the cavity, and its output shaft connected to the moving blade disc; the moving blade disc has multiple moving blades, and the fixed blades are located in the cavity and on one side of the moving blade disc; the controller is connected to the motor; the guide plate is located in the middle of the cavity; the pressure plate is located at the upper end of the cavity, below the opening, and surrounds the cavity; the pressure plate has an inner wall facing the center of the bottom of the pot body; as the material rises, the conical inclined surface of the pressure plate can press down on the material, forming a turning action, ensuring thorough mixing and shearing of the material, improving pelletizing efficiency and particle uniformity.

Description

Technical Field

[0001] This utility model relates to the field of waste material recycling, and in particular to a pelletizing machine. Background Technology

[0002] A pelletizer is a type of mechanical equipment mainly used in the plastic recycling and processing industry. It works by generating heat through friction between the chemical fiber material and the moving blades, blade disc, fixed blades, and pot walls during the rotation and tumbling process, causing the chemical fiber material to shrink thermally.

[0003] However, during granulation, centrifugal force causes the material to form a vortex effect, and the material moves upward away from the cutter head, resulting in uneven heating and incomplete melting, which reduces particle uniformity and granulation efficiency. Utility Model Content

[0004] Therefore, there is a need to provide a pelletizer that can solve the problem that when materials move upward during pelleting, they are prone to forming eddies or local accumulation, which reduces pelleting efficiency and particle uniformity.

[0005] To achieve the above objectives, the inventors provide a pelletizing machine, comprising: a pot body, a pot lid, a blade assembly, a controller, a guide plate, and a pressure plate;

[0006] The interior of the pot body is provided with a receiving cavity for accommodating the blade device and the chemical fiber material, and the upper end of the receiving cavity has an opening;

[0007] The pot lid is placed over the opening and is located above the pressure plate;

[0008] The blade assembly includes a movable blade disc, a motor, and a fixed blade. The movable blade disc is centrally located in the receiving cavity. The motor is located below the receiving cavity, and its output shaft is connected to the movable blade disc for transmission. The movable blade disc is provided with multiple movable blades, and the fixed blade is located in the receiving cavity and is situated on one side of the movable blade disc.

[0009] The controller is connected to the motor;

[0010] The guide plate is located in the middle of the accommodating cavity;

[0011] The pressure plate is located at the upper end of the accommodating cavity, below the opening, and surrounds the accommodating cavity. The pressure plate has an inner wall facing the center of the bottom of the pot body, which is used to flip the material to the center of the pot body.

[0012] Furthermore, the inner wall of the pressure plate is inclined and forms a frustum shape, wherein the diameter of the upper end of the frustum shape is smaller than the diameter of the bottom end.

[0013] Furthermore, the inclination angle of the inclined plane is 45°.

[0014] Furthermore, the height of the inclined plane is 59.5 mm, the upper inner diameter of the frustum is 876 mm, and the lower inner diameter is 995 mm.

[0015] Furthermore, the inner wall of the pressure plate is curved, with the concave surface of the curved surface facing the center of the accommodating cavity.

[0016] Furthermore, the upper end of the inner sidewall of the pressure plate is connected to the bottom edge of the opening.

[0017] Furthermore, it also includes a temperature sensor, and the side wall of the accommodating cavity has a mounting groove, the temperature sensor is disposed in the mounting groove, and the alloy probe of the temperature sensor extends out of the mounting groove and reaches above the fixed blade.

[0018] Furthermore, the vertical distance between the alloy probe and the fixed blade is 80mm.

[0019] Furthermore, it also includes a water spraying device, which is mounted on the pot lid and connected to the controller.

[0020] Furthermore, the water spraying device includes a nozzle and a water pipe. The nozzle is located on the inner side of the pot lid, and the outlet of the nozzle is aligned with the center of the moving blade disc. The pot lid also has a hole for the inlet of the nozzle to extend out. The inlet of the nozzle is connected to the water pipe, and the nozzle is equipped with a valve connected to the controller.

[0021] Unlike existing technologies, the above technical solution has the following beneficial effects:

[0022] The material is repeatedly tumbled up and down inside the pot, and flows along the direction guided by the guide plate. As the material rises, the truncated cone-shaped inclined surface of the pressure plate can press down on the material, forming a turning process, ensuring that the material is fully mixed and sheared, thereby improving granulation efficiency and particle uniformity.

[0023] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0024] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this utility model and other related contents, and should not be considered as limitations on this application.

[0025] Figure 1 This is a cross-sectional view of the pot body in this embodiment;

[0026] Figure 2 This is a perspective view of the pot body in this embodiment;

[0027] Figure 3 This is a top view of the pot body in this embodiment;

[0028] Figure 4 This is a front view of the pot lid and water spray device in this embodiment;

[0029] Figure 5 This is a front view of the pot body in this embodiment.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Pot body; 11. Receiving cavity; 12. Opening;

[0032] 2. Pot lid;

[0033] 3. Blade assembly; 31. Moving blade disc; 311. Moving blade; 32. Fixed blade;

[0034] 4. Deflector plate;

[0035] 5. Pressure plate; 51. Inner side wall;

[0036] 6. Temperature sensor;

[0037] 7. Sprinkler device; 71. Nozzle; 72. Water pipe; 73. Valve. Detailed Implementation

[0038] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0039] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0040] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0041] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0042] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0043] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0044] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0045] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0046] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0047] A pelletizer is a type of machinery mainly used in the plastic recycling and processing industry. Its main function is to transform waste plastic films, sheets, fibers, or other forms of thermoplastic waste into uniform plastic granules through a series of physical processes. These granules can then be used as raw materials in the production of plastic products.

[0048] Granulation in a pellet mill utilizes the thermal shrinkage property of synthetic fiber materials. A high-speed rotating moving blade disc is equipped with sharp moving blades, which work in conjunction with fixed blades. Together, they create a high-intensity shearing force field. As the material rotates at high speed in the pot, it tumbles inside the pot through the guide plate. During the rotation and tumbling process, the material in the pot rubs against the moving blades, the blade disc, the fixed blades, and the pot wall. The friction generates heat, causing the synthetic fiber material to shrink.

[0049] However, during granulation, centrifugal force causes the material to form a vortex effect, and the material moves upward away from the cutter head, resulting in uneven heating and incomplete melting, which reduces particle uniformity and granulation efficiency.

[0050] To resolve the above issues, please refer to [link / reference]. Figures 1 to 5 This embodiment provides a pelletizing machine, including: a pot body 1, a pot lid 2, a blade device 3, a controller, a guide plate 4, and a pressure plate 5;

[0051] The interior of the pot body 1 is provided with a receiving cavity 11 for receiving the blade device 3 and the chemical fiber material, and the upper end of the receiving cavity 11 has an opening 12;

[0052] The lid 2 is placed at the opening 12 and is located above the pressure plate 5;

[0053] The blade device 3 includes a movable blade disc 31, a motor and a fixed blade 32. The movable blade disc 31 is centrally located in the receiving cavity 11. The motor is located below the receiving cavity 11 and its output shaft is connected to the movable blade disc 31 for transmission. The movable blade disc 31 is provided with multiple movable blades 311. The fixed blade 32 is located in the receiving cavity 11 and is located on one side of the movable blade disc 31.

[0054] The controller is connected to the motor;

[0055] The guide plate 4 is located in the middle of the accommodating cavity 11;

[0056] The pressure plate 5 is located at the upper end of the accommodating cavity 11, below the opening 12, and surrounds the accommodating cavity 11. The pressure plate 5 has an inner wall facing the center of the bottom of the pot body, which is used to flip the material to the center of the pot body.

[0057] The material is repeatedly turned up and down inside the pot 1. The material will flow along the direction guided by the guide plate 4. When the material rises, the truncated cone-shaped inclined surface of the pressure plate 5 can press down on the material to form a turning, ensuring that the material is fully mixed and sheared, improving granulation efficiency and particle uniformity, and reducing the eddy effect.

[0058] Please see Figure 1 and Figure 2 In this embodiment, the inner wall 51 of the pressure plate 5 is an inclined surface and forms a frustum shape. The diameter of the upper end of the frustum shape is smaller than the diameter of the bottom end, and the vertical section of the inner wall 51 is a straight inclined surface.

[0059] Please see Figure 1 and Figure 2 In a further embodiment, the inclination angle of the inclined surface of the inner sidewall 51 is 45°. The height of the inclined surface is 59.5 mm, the upper inner diameter of the frustum shape is 876 mm, and the lower inner diameter is 995 mm. The upper end of the inner sidewall 51 of the pressure plate 5 is connected to the bottom edge of the opening 12, and the lower end of the inner sidewall 51 is connected to the sidewall of the accommodating cavity 11. The inner diameter of the pot body 1 is 995 mm, and the depth is 740 mm. This allows the material to be subjected to a certain degree of pressure and guidance after contacting the inclined surface.

[0060] In some embodiments, the inner wall of the pressure plate 5 is curved, with the concave surface of the curved surface facing the center of the receiving cavity. The concave surface allows the material to be flipped back to the center of the pot, creating a material-flipping effect.

[0061] In this embodiment, the guide plate 4 also partially functions as a material-turning plate. However, it is located in the middle of the pot body, and structurally consists of three guide plates evenly distributed around the pot body. There are gaps between the guide plates, so it cannot completely turn the material. Therefore, in the pellet mill, the turning action of the pressure plate is needed to solve the vortex effect and improve the uniformity of the particles.

[0062] Please see Figure 1In this embodiment, the pelletizer also includes a temperature sensor 6. The side wall of the accommodating cavity 11 has a mounting groove, and the temperature sensor 6 is located in the mounting groove. The alloy probe of the temperature sensor 6 extends out of the mounting groove and reaches above the fixed blade 32. Under the high-speed rotation of the moving blade disc 31, the chemical fiber material generates strong friction with the fixed blade 32, the moving blade 311, and the pot wall. Since the fixed blade 32 is a fixed component, the shearing action between it and the moving blade 311 generates a localized high-temperature zone. The alloy probe extends and points towards the area above the fixed blade 32, enabling precise temperature acquisition. The controller can adjust the motor speed or perform other operations based on the temperature collected by the temperature sensor 6 to maintain the temperature inside the pot 1.

[0063] Please see Figure 1 In this embodiment, the vertical distance between the alloy probe and the fixed blade 32 is 80mm, and the size of the mounting groove is M20*1.530mm.

[0064] Please see Figure 4 In this embodiment, the pelletizer also includes a water spraying device 7, which is mounted on the pot lid 2 and connected to the controller. According to the controller's instructions, the water spraying device sprays an appropriate amount of water into the pot 1 at appropriate times, allowing the material inside the pot to cool and harden due to frictional thermal shrinkage, thus promoting pellet formation. Specifically, the water flow first contacts the center of the high-speed rotating cutter disc 31. Because the cutter disc 31 generates centrifugal force during rotation, some of the water flow can further diffuse to the outer area, thereby improving the cooling efficiency of the chemical fiber melt within the entire pot 1.

[0065] Please see Figure 4 In this embodiment, the water spraying device 7 includes a nozzle 71 and a water pipe 72. The nozzle 71 is provided on the inner side of the pot lid 2, and the outlet of the nozzle 71 is aligned with the center of the moving blade disc 31. The pot lid 2 also has a hole for the water inlet of the nozzle 71 to extend out. The water inlet of the nozzle 71 is connected to the water pipe 72, and the nozzle 71 is provided with a valve 73 connected to the controller. Preferably, the nozzle 71 is about 1 meter above the pot surface.

[0066] The inlet of water pipe 72 is connected to an external water source, while the outlet is tightly connected to the inlet of nozzle 71 to ensure unobstructed water flow. Water pipe 72 is made of flexible material, possessing a certain degree of bending and expansion capacity to accommodate the opening, closing, and rotation of the lid 2. Valve 73 can be installed near the inlet of nozzle 71 to control the on / off state and flow rate of water. Preferably, valve 73 is a fluid solenoid valve, which is connected to a controller and receives electrical signals from the controller to achieve precise control of valve 73. The fluid solenoid valve features fast response and high control accuracy, meeting the requirements for precise control of cooling water volume during the granulation process of chemical fiber materials.

[0067] In this embodiment, when the temperature sensor 6 detects that the temperature inside the pot 1 has reached a threshold, the controller sends an opening signal to the fluid solenoid valve. Upon receiving the signal, the solenoid valve opens rapidly, allowing cooling water to enter the nozzle 71 through the water pipe 72. The nozzle 71 sprays water mist evenly onto the center of the moving blade disc 31, rapidly cooling the molten chemical fiber material.

[0068] Please see Figure 1 and Figure 3 In this embodiment, the moving blade disc 31 is centrally installed in the accommodating cavity 11, and multiple moving blades 311 are mounted on it and driven to rotate by a motor. The fixed blade 32 is fixed to the side wall or bottom of the accommodating cavity 11, surrounding the moving blade disc 31. During the rotation and tumbling process, the material in the pot rubs against the moving blades 311, the moving blade disc 31, the fixed blade 32, and the pot wall. The friction generates heat, causing the chemical fiber material to shrink thermally. At the same time, the fixed blade 32 and the moving blades 311 form a shearing action, cutting the chemical fiber material into granules.

[0069] Please see Figure 1 In this embodiment, the pelletizer has a fixed base below the pot body 1, and a motor is provided on the fixed base. The motor is connected to the moving cutter disc 31 through a transmission component. The center of the moving cutter disc 31 is provided with a transmission shaft of the transmission component. The transmission shaft passes through the bottom of the pot body 1 and extends downward. It can be equipped with a synchronous belt or gear.

[0070] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A pelletizing machine, characterized in that, include: Pot body, pot lid, blade assembly, controller, baffle plate, and pressure plate; The interior of the pot body is provided with a receiving cavity for accommodating the blade device and the chemical fiber material, and the upper end of the receiving cavity has an opening; The pot lid is placed over the opening and is located above the pressure plate; The blade assembly includes a movable blade disc, a motor, and a fixed blade. The movable blade disc is centrally located in the receiving cavity. The motor is located below the receiving cavity, and its output shaft is connected to the movable blade disc for transmission. The movable blade disc is provided with multiple movable blades, and the fixed blade is located in the receiving cavity and is situated on one side of the movable blade disc. The controller is connected to the motor; The guide plate is located in the middle of the accommodating cavity; The pressure plate is located at the upper end of the accommodating cavity, below the opening, and surrounds the accommodating cavity. The pressure plate has an inner wall facing the center of the bottom of the pot body, which is used to flip the material to the center of the pot body.

2. The pelletizing machine according to claim 1, characterized in that, The inner wall of the pressure plate is inclined and forms a frustum shape, with the upper diameter of the frustum shape being smaller than the lower diameter.

3. A pelletizing machine according to claim 2, characterized in that, The inclination angle of the inclined plane is 45°.

4. A pelletizing machine according to claim 2, characterized in that, The height of the inclined plane is 59.5 mm, the upper inner diameter of the frustum is 876 mm, and the lower inner diameter is 995 mm.

5. A pelletizing machine according to claim 1, characterized in that, The inner wall of the pressure plate is curved, with the concave side of the curved surface facing the center of the accommodating cavity.

6. A pelletizing machine according to claim 1, characterized in that, The upper end of the inner wall of the pressure plate is connected to the bottom edge of the opening.

7. A pelletizing machine according to claim 1, characterized in that, It also includes a temperature sensor, and the side wall of the accommodating cavity has a mounting groove. The temperature sensor is disposed in the mounting groove, and the alloy probe of the temperature sensor extends out of the mounting groove and reaches above the fixed blade.

8. A pelletizing machine according to claim 7, characterized in that, The distance between the alloy probe and the fixed blade in the vertical direction is 80mm.

9. A pelletizing machine according to claim 1, characterized in that, It also includes a water spraying device, which is mounted on the pot lid and connected to the controller.

10. A pelletizing machine according to claim 9, characterized in that, The water spraying device includes a nozzle and a water pipe. The nozzle is provided on the inner side of the pot lid. The outlet of the nozzle is aligned with the center of the moving blade disc. The pot lid is also provided with a hole for the water inlet of the nozzle to extend out. The water inlet of the nozzle is connected to the water pipe. The nozzle is provided with a valve connected to the controller.

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