A granulating apparatus for processing a foamed material

Abstract

This application relates to the technical field of plastic granule processing, and discloses a granulation equipment for processing foamed materials, including a base, a moving pelletizing mechanism, and a fixed pelletizing mechanism. The die head assembly includes a temperature control plate, a die head, and a heat insulation plate stacked sequentially. The temperature control plate and the heat insulation plate are located on both sides of the die head. Both the heat insulation plate and the temperature control plate are provided with clearance holes, which correspond one-to-one with the extrusion holes of the die head. A first heating element is provided inside the temperature control plate to generate heat, and a first monitoring element is provided inside the heat insulation plate to acquire the temperature of the die head. The die head assembly includes a temperature control plate, a die head, and a heat insulation plate stacked sequentially. The first heating element in the temperature control plate generates heat to actively compensate for the heat of the die head and prevent the die holes from freezing and clogging due to excessively low temperature. The heat insulation plate blocks heat transfer to other components, reducing heat loss. The first monitoring element acquires the die head temperature for real-time monitoring and adjustment, ensuring stable die head temperature.

Description

Technical Field

[0001] This application relates to the technical field of plastic granule processing, and more specifically to a granulation device for processing foamed materials. Background Technology

[0002] In the field of plastics processing, pelleting is a technology that transforms plastic raw materials into particles with a certain shape and size. Underwater pelleting is a commonly used pelleting technique. In existing underwater pelleting technologies, the heat of the material itself is usually relied upon to maintain the temperature of the die orifice. However, for temperature-sensitive or low-viscosity engineering plastics such as nylon and PET, the die orifice is prone to "freezing," leading to die blockage and ultimately causing the entire machine to stop production, severely impacting production efficiency and product quality. Summary of the Invention

[0003] In view of this, this application provides a granulation equipment for processing foamed materials to solve the problem that the die holes are prone to "freezing" during the pelletizing process of temperature-sensitive or low-viscosity engineering plastics, which leads to die hole blockage, and thus causes the whole machine to stop production, seriously affecting production efficiency and product quality.

[0004] In a first aspect, this application discloses a granulation device for processing foamed materials, comprising: seat body; A mobile pelletizing mechanism includes a first drive unit, a cutting roller, and a first cover. The first drive unit is mounted on the base and connected to the cutting roller. The first cover is located between the first drive unit and the cutting roller. A fixed pelletizing mechanism includes a first cover, a die assembly, a water inlet pipe, and a water return pipe. The first cover is connected to the first cover and covers the first opening of the first cover to form a pelletizing chamber. The second opening of the first cover is connected to the die assembly. The third opening of the first cover is connected to the water inlet pipe. The fourth opening of the first cover is connected to the water return pipe. The first opening, the second opening, the third opening, and the fourth opening are distributed circumferentially around the first cover. The die head assembly includes a temperature control plate, a die head, and a heat insulation plate stacked sequentially. The temperature control plate and the heat insulation plate are located on both sides of the die head. Both the heat insulation plate and the temperature control plate are provided with clearance holes, which correspond one-to-one with the extrusion holes of the die head. A first heating element is provided inside the temperature control plate to generate heat. A first monitoring element is provided inside the heat insulation plate to acquire the temperature of the die head.

[0005] Beneficial effects: The base provides an installation foundation for both the mobile and fixed pelletizing mechanisms. The first drive unit rotates the cutting roller to cut and pelletize the material extruded from the die head. The first cover connects to the first housing and covers the first opening, forming a closed pelletizing chamber to meet the requirement of cooling the pellets with cooling water. The second opening of the first housing is connected to the die head assembly, through which the extruded material enters the pelletizing chamber; the third opening is connected to the water inlet pipe, and the fourth opening is connected to the water return pipe. The first, second, third, and fourth openings are distributed circumferentially around the first housing, dispersing the water inlet / outlet, material feed, and cover installation positions of the pelletizing chamber, resulting in a compact structure and ensuring that the cooling water flow path passes through the pelletizing chamber. The mold head assembly includes a temperature control plate, a mold head, and a heat insulation plate stacked in sequence. The first heating element in the temperature control plate generates heat to actively compensate for the heat of the mold head and prevent the mold holes from freezing and clogging due to excessively low temperatures. The heat insulation plate blocks heat from being transferred to other components, reducing heat loss. The first monitoring element acquires the mold head temperature, which is convenient for real-time monitoring and adjustment, ensuring the stability of the mold head temperature.

[0006] In one optional embodiment, the surface of the temperature control plate near the mold head is provided with a plurality of first grooves, the plurality of first grooves being distributed at intervals around the axis of the temperature control plate, and each first groove being provided with a first heating element. The heat insulation plate has multiple second grooves on one side of its surface near the mold head. These second grooves are spaced apart around the axis of the heat insulation plate, and each second groove contains the first monitoring element.

[0007] Beneficial effects: Multiple primary heating elements are arranged in a ring array, each heating its corresponding area of ​​the die head, preventing localized overcooling that could lead to die freezing. The primary monitoring elements are also arranged in a ring array, allowing for multi-point temperature monitoring and more comprehensive temperature control, facilitating the timely detection of abnormal temperature areas.

[0008] In one alternative embodiment, a first flow meter is further included, disposed on the inlet pipe, for obtaining the flow rate of the fluid medium in the inlet pipe.

[0009] Beneficial effects: The first flow meter is installed on the inlet pipe to obtain the flow rate of the fluid medium in the inlet pipe. The first flow meter monitors the cooling water inlet flow rate in real time. When the flow rate is insufficient, it can provide timely warnings or adjust the inlet water flow rate to avoid the pellets from sticking together due to insufficient cooling water flow rate causing the pellets to fail to solidify or the solidification degree to not meet the preset requirements.

[0010] In one alternative implementation, it further includes: The first support frame is connected to the base body; The first slider is slidably connected to the first support frame and is fixedly connected to the first driving member; The limiting member passes through the first slider and is then inserted into the first support frame.

[0011] Beneficial effects: The first support frame is connected to the base body, providing support for the first driving component. The first slider is slidably connected to the first support frame and fixedly connected to the first driving component. The first slider can slide along the first support frame, driving the first driving component and the cutting roller to move, facilitating the adjustment of the gap between the cutting roller and the die head to meet the needs of cutting pellets of different lengths. One end of the limiting component passes through the first slider and inserts into the first support frame, fixing the first slider in the required position, preventing slider displacement during cutting, ensuring stable cutting gap, and improving pellet cutting accuracy.

[0012] In an optional embodiment, a plurality of leveling components are further included, spaced apart between the first support frame and the base, each leveling component comprising: The first rod has one end inserted into the base and rotatably connected to the base, and the other end rotatably connected to the first support frame; The first nut is rotatably connected to the base and is sleeved on the outer periphery of the first rod and threadedly connected to the first rod.

[0013] Beneficial effects: Multiple leveling components are spaced apart between the first support frame and the base. Rotating the first nut, which is rotatably connected to the base and threadedly connected to the first rod, causes the first rod to move axially, thereby adjusting the distance between the first support frame and the corresponding base. These multiple leveling components can be adjusted independently to keep the first support frame horizontal, ensuring that the cutting roller mounted on it is parallel to the die head end face, improving the consistency of pellet length and pellet quality.

[0014] In one optional embodiment, the pelletizing mechanism further includes: The start valve is connected to the side of the mold head assembly opposite to the second opening; The screen changer is connected to the side of the start-up valve opposite to the mold head assembly.

[0015] Beneficial effects: The screen changer can filter impurities and unmelted particles from the molten material, preventing impurities from clogging the die orifices. The start-up valve can switch the material flow direction during the initial stage of startup or when changing the filter screen, allowing initial material containing air bubbles, impurities, or uneven temperature to bypass the die head assembly and be discharged directly, preventing unqualified material from entering the pelletizing chamber and ensuring stable product quality.

[0016] In one alternative implementation, it further includes: An extruder is fixed on the base, and the outlet of the extruder is connected to the side of the screen changer away from the start-up valve. The feed hopper is connected to the inlet of the extruder.

[0017] Beneficial effects: The extruder is fixed on the base, with its outlet connected to the screen changer and its feed hopper connected to the extruder inlet. The feed hopper is used to hold the raw materials and transport them to the extruder. The extruder heats and melts the raw materials and pressurizes them to push them to the screen changer and die assembly, realizing continuous feeding, melting, and extrusion of the raw materials and ensuring the continuity of the production process.

[0018] In one alternative implementation, it further includes: The filter box is connected to the return water pipe; A centrifugal dewatering machine is used to receive the material filtered by the filter box; The process water tank is connected to both the filter box and the centrifugal dewatering machine. The storage bin is located below the discharge port of the centrifugal dewatering machine.

[0019] Beneficial effects: The filter box is connected to the return water pipe, receiving and filtering the cooling water containing particles discharged from the pelletizing chamber, thus initially separating the particles from the water. The centrifugal dewatering machine receives the filtered particles from the filter box and dewaters them, reducing the moisture content of the finished particles. The process water tank is connected to both the filter box and the centrifugal dewatering machine, collecting the filtered water and the water discharged from the centrifuge for recycling, saving water resources. The storage tank is located below the discharge port of the centrifugal dewatering machine, receiving the dewatered finished particles for easy storage and transportation.

[0020] In one alternative implementation, a control panel is further included, which is electrically connected to all of the first heating elements, all of the first monitoring elements, and the first flow meter, respectively.

[0021] Beneficial effects: The control panel is electrically connected to all the first heating elements, all the first monitoring elements, and the first flow meter. The control panel receives the die head temperature signal collected by each first monitoring element and the inlet water flow signal collected by the first flow meter. Based on the temperature and flow data, it automatically adjusts the heating power of each first heating element, achieving closed-loop control of the die head temperature. When the temperature is lower than the set threshold or the flow is abnormal, the control panel can automatically alarm or adjust operating parameters to prevent the die orifice from freezing and clogging due to excessively low temperature or abnormal cooling, thus improving the automation level and operational stability of the equipment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a granulation device for processing foamed materials provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a granulation device for processing foamed materials, provided as an embodiment of this application, from another perspective. Figure 3 An exploded view of a die head assembly in a granulation device for processing foamed materials, provided in an embodiment of this application; Figure 4 An exploded view of a die head assembly in a granulation device for processing foamed materials, provided as an embodiment of this application; Figure 5 for Figure 1 A magnified view of a portion of the center circle A; Figure 6 for Figure 2 A magnified view of a portion of the center circle B; Figure 7 for Figure 2 A magnified view of a portion of the center circle C.

[0024] Explanation of reference numerals in the attached figures: 101. Base body; 201. First driving component; 202. Cutting roller; 203. First cover; 301. First cover; 302. Mold head assembly; 3021. Temperature control plate; 3022. Mold head; 3023. Heat insulation plate; 3024. First groove; 3025. First heating element; 3026. Second groove; 3027. First monitoring element; 303. Water inlet pipe; 304. Water return pipe; 305. Start-up valve; 306. Screen changer; 401. First flow meter; 402. First support frame; 403. First slider; 404. Extruder; 405. Feed hopper; 406. Filter box; 407. Centrifugal dewatering machine; 408. Storage tank; 409. Control panel; 410. Process water tank; 411. Pump body; 501. First rod; 502. First nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] The technical solutions in the embodiments of this application will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this application, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this application without creative effort are also within the protection scope of this application.

[0030] Reference Figures 1 to 7This embodiment provides a granulation device for processing foamed materials, including a base 101, a movable pelletizing mechanism, and a fixed pelletizing mechanism. The movable pelletizing mechanism includes a first driving member 201, a cutting roller 202, and a first cover 203. The first driving member 201 is mounted on the base 101 and connected to the cutting roller 202. The first cover 203 is located between the first driving member 201 and the cutting roller 202. The fixed pelletizing mechanism includes a first cover 301, a die assembly 302, a water inlet pipe 303, and a water return pipe 304. The first cover 203 is connected to the first cover 301 and covers the first opening of the first cover 301 to form a pelletizing chamber. The second opening of the first cover 301 is connected to the die assembly 302. The third opening of the first cover 301 is connected to the water inlet pipe 303. The fourth opening of the first cover 301 is connected to the water return pipe 304. The tube 304 is connected, and the first opening, the second opening, the third opening and the fourth opening are distributed circumferentially around the first cover 301; the die head assembly 302 includes a temperature control plate 3021, a die head 3022 and a heat insulation plate 3023 stacked in sequence. The temperature control plate 3021 and the heat insulation plate 3023 are located on both sides of the die head 3022. Both the heat insulation plate 3023 and the temperature control plate 3021 are provided with clearance holes, which correspond one-to-one with the extrusion holes of the die head 3022. The temperature control plate 3021 is provided with a first heating element 3025, which is used to generate heat. The heat insulation plate 3023 is provided with a first monitoring element 3027, which is used to obtain the temperature on the die head 3022.

[0031] Specifically, such as Figure 1 As shown, the base 101 is a rectangular box structure welded from steel plates, used to support and fix the various components of the equipment. Casters are installed at the bottom of the base 101, allowing it to be fixedly connected to the factory floor. The pelletizing mechanism is mounted and fixed on the upper surface of the base 101.

[0032] Specifically, such as Figure 1 and Figure 2 As shown, the first drive component 201 is mounted on the base 101. The first drive component 201 is a servo motor, and its speed is infinitely variable through a servo driver. The first drive component 201 is fixed to the first support frame 402 by bolts. The output shaft of the first drive component 201 is connected to the cutter shaft of the cutting hob 202 through a coupling to compensate for installation errors. Figure 6As shown, the cutting roller 202 is connected to the first drive member 201 and is driven by the first drive member 201 to rotate at high speed, cutting the molten material extruded from the die head 3022. The cutting roller 202 is a disc-shaped cutter made of high-speed tool steel, with 12 cutting edges evenly distributed on the blade body. The cutter shaft of the cutting roller 202 is supported on the first support frame 402 by a bearing seat. The bearing is a ceramic bearing, and a labyrinth seal is provided in the bearing seat to prevent cooling water and particles from entering the bearing. The first cover 203 is located between the first drive member 201 and the cutting roller 202. The first cover 203 is a disc-shaped stainless steel plate. A through hole is opened in the center of the first cover 203 for the cutter shaft to pass through. A rotary seal is provided at the through hole to prevent cooling water in the pelletizing chamber from leaking outward along the cutter shaft. The outer edge of the first cover 203 has a flange edge with bolt holes. The flange edge is connected to the first cover 301 by bolts. A rubber gasket is provided between the flange surfaces to ensure sealing. The first cover 301 is a cylindrical stainless steel shell with openings at both ends. One end is the first opening (facing the cutting roller 202), and the other end is the second opening (connecting to the die assembly 302). The sidewalls of the first cover 301 have a third and a fourth opening. The third opening is located on the upper part of the sidewall, and the fourth opening is located on the lower part of the sidewall, opposite to the third opening. The first, second, third, and fourth openings are distributed circumferentially around the first cover 301 at 90° intervals, ensuring that the material inlet / outlet and water inlet / outlet positions are dispersed and do not interfere with each other, resulting in a compact structure. The first cover 203 is mated to the first cover 301 and covers the first opening of the first cover 301, secured with bolts and gaskets to form a closed pelletizing chamber. The pelletizing chamber is filled with cooling water. The cutting roller 202 rotates within the pelletizing chamber to cut the material, and the cooling water promptly removes heat and delivers the pellets. The second opening of the first cover 301 is connected to the die assembly 302. The molten material extruded from the die assembly 302 enters the pelletizing chamber through the second opening and is cut into pellets by the cutting roller 202 in water. The second opening is connected to the die assembly 302 via a flange, with a sealing gasket between the flanges. The third opening of the first cover 301 is connected to the water inlet pipe 303, which is a stainless steel pipe used to supply cooling water to the pelletizing chamber. The water inlet direction of the water inlet pipe 303 can be along the radial direction of the pelletizing chamber, so that the cooling water forms a uniform flow field in the pelletizing chamber. The fourth opening of the first cover 301 is connected to the return water pipe 304, which is also a stainless steel pipe, through which the cooling water carrying the pellets is discharged.

[0033] Specifically, such as Figure 3 and Figure 4As shown, the die assembly 302 includes a temperature control plate 3021, a die 3022, and a heat insulation plate 3023 stacked sequentially. The temperature control plate 3021 is located on one side of the die 3022 (the side facing away from the pelletizing chamber). The temperature control plate 3021 is a circular steel plate, and a first heating element 3025 is installed inside the temperature control plate 3021 to actively generate heat and conduct it to the die 3022, compensating for heat loss due to cooling water, maintaining a stable die temperature, and preventing the die from freezing and clogging due to excessively low temperatures. The surface of the temperature control plate 3021 closest to the die 3022 is in close contact with the end face of the die 3022 to ensure good heat conduction. The die 3022 is located between the temperature control plate 3021 and the heat insulation plate 3023. The die 3022 is made of hot-work die steel and has 10 extrusion holes (i.e., die orifices). The die holes are arranged in a concentric array on the die head 3022, and the hole walls are polished to reduce melt flow resistance. A mounting flange is provided on the outer periphery of the die head 3022, which is bolted to the temperature control plate 3021 and the heat insulation plate 3023. The heat insulation plate 3023 is located on the other side of the die head 3022 (near the pelletizing chamber). The heat insulation plate 3023 is made of high-temperature resistant heat-insulating material; in this embodiment, it is a ceramic fiber plate. The diameter of the heat insulation plate 3023 is the same as that of the die head 3022. A first monitoring element 3027 is installed inside the heat insulation plate 3023 to acquire the temperature of the die head 3022. The function of the heat insulation plate 3023 is to prevent heat transfer from the die head 3022 to the pelletizing chamber side, reducing heat loss, and simultaneously preventing the low-temperature cooling water in the pelletizing chamber from directly acting on the end face of the die head 3022, which could cause a sudden drop in die hole temperature and freezing. Both the temperature control plate 3021 and the heat insulation plate 3023 are provided with clearance holes, which correspond one-to-one with the extrusion holes of the die head 3022 to ensure that the material is extruded smoothly without contacting the wall of the clearance hole. The base 101 provides a mounting foundation for the moving pelletizing mechanism and the fixed pelletizing mechanism. The first driving component 201 drives the cutting roller 202 to rotate, cutting and pelletizing the material extruded from the die head 3022. The first cover 203 is connected to the first cover 301 and covers the first opening to form a closed pelletizing chamber to meet the requirement of cooling the pellets with cooling water. The second opening of the first cover 301 is connected to the die assembly 302, and the extruded material enters the pelletizing chamber through the second opening; the third opening is connected to the water inlet pipe 303, and the fourth opening is connected to the water return pipe 304. The first opening, the second opening, the third opening, and the fourth opening are distributed circumferentially around the first cover 301, so that the water inlet and outlet, the material inlet, and the cover installation position of the pelletizing chamber are dispersed, the structure is compact, and the flow path of the cooling water passes through the pelletizing chamber, so as to remove the pelletizing heat in time.The die assembly 302 includes a temperature control plate 3021, a die 3022, and a heat insulation plate 3023 stacked in sequence. The first heating element 3025 in the temperature control plate 3021 generates heat to actively compensate for the heat of the die 3022 and prevent the die holes from freezing and clogging due to low temperature. The heat insulation plate 3023 blocks the transfer of heat to the pelletizing chamber side and reduces heat loss. The first monitoring element 3027 acquires the temperature of the die 3022 for real-time monitoring and adjustment to ensure the temperature stability of the die 3022.

[0034] Furthermore, such as Figure 3 and Figure 4 As shown, the surface of the temperature control plate 3021 near the mold head 3022 has multiple first grooves 3024. In this embodiment, the first grooves 3024 are fan-shaped grooves, and the multiple first grooves 3024 are distributed at intervals around the axis of the temperature control plate 3021, with a total of 8 grooves, evenly arranged in the circumferential direction. Each first groove 3024 is embedded with a first heating element 3025, which is a ceramic heating plate. The heating plate's shape and size are adapted to the first groove 3024. The first heating element 3025 is tightly attached to the wall of the first groove 3024 with thermally conductive silicone grease to reduce contact thermal resistance. The lead wires of the first heating element 3025 are led out through lead wire holes on the side wall of the temperature control plate 3021, and the lead wire holes are sealed with high-temperature resistant sealant. Multiple first heating elements 3025 are arranged in a ring array to provide multi-point, circumferentially uniform heating to the mold head 3022, avoiding localized hot or cold spots and improving the uniformity of temperature distribution. Multiple second grooves 3026 are formed on the surface of the heat insulation plate 3023 near the mold head 3022. Each second groove 3026 is a fan-shaped groove, and eight of them are spaced apart around the axis of the heat insulation plate 3023, evenly arranged circumferentially. A first monitoring element 3027, which is a thermocouple, is embedded within each second groove 3026. The temperature-sensing end of the first monitoring element 3027 is close to the end face of the mold head 3022 to accurately obtain the temperature of the mold head 3022. The first monitoring element 3027 is fixed in the second groove 3026 with high-temperature resistant sealant, and the lead wire is led out through the lead wire groove on the side wall of the heat insulation plate 3023. Multiple first heating elements 3025 are arranged in a ring array, each heating element 3025 heating a corresponding area of ​​the mold head 3022 to prevent localized overcooling and freezing of the mold holes. The first monitoring elements 3027 are also arranged in a ring array, allowing simultaneous temperature collection at different circumferential positions of the mold head 3022, forming a temperature field monitoring network for more comprehensive temperature monitoring. When the temperature in a certain area is too low, the power of the corresponding first heating element 3025 in that area can be increased to achieve zoned temperature control.

[0035] Furthermore, such as Figure 5As shown, it also includes a first flow meter 401, which is installed on the inlet pipe 303 to obtain the flow rate of the fluid medium inside the inlet pipe 303. The first flow meter 401 is an electromagnetic flow meter. The first flow meter 401 is installed on the straight section of the inlet pipe 303. The first flow meter 401 monitors the flow rate of cooling water entering the pelletizing chamber in real time and transmits the flow signal to the control system. The first flow meter 401 is installed on the inlet pipe 303 to obtain the flow rate of the fluid medium inside the inlet pipe 303. The first flow meter 401 monitors the cooling water inlet flow rate in real time. When the flow rate is insufficient, it can provide timely warnings or adjust the inlet flow rate to avoid pellets sticking due to insufficient cooling water flow rate, which may prevent pellets from curing or not meeting the preset curing degree. When the inlet flow rate is too high, the control system can reduce the opening of the inlet valve to prevent the temperature of the die head 3022 from being excessively carried away. The coordinated monitoring of flow rate and temperature makes the temperature control of the die head 3022 more stable and reliable.

[0036] Furthermore, such as Figure 1 and Figure 2As shown, the moving pelletizing mechanism also includes a first support frame 402, a first slider 403, and a limiting member. The first support frame 402 is connected to the base 101 and is a rectangular frame structure welded from channel steel. A linear guide rail is mounted on the upper surface of the first support frame 402. The first slider 403 is slidably connected to the linear guide rail, and its upper surface is fixedly connected to the first drive member 201. The first slider 403 is made of cast iron and is slidably connected to the upper surface or side of the first support frame 402 via the linear guide rail. A motor mounting plate is bolted to the upper surface of the first slider 403, and the first drive member 201 is fixed to the motor mounting plate. The first slider 403 can move along the linear guide rail, causing the first drive member 201 and the cutting roller 202 to move closer to or away from the die head assembly 302, thereby adjusting the gap between the cutting roller 202 and the end face of the die head 3022. The limiting member is a pin made of stainless steel. The first slider 403 has a through hole, and the first support frame 402 has a corresponding positioning hole (the positioning hole is a blind hole). When the first slider 403 moves to the set position, the limiting member is inserted into the through hole and the positioning hole to restrict the movement of the first slider 403 and fix the cutting roller 202 in the required axial position. The positioning holes are arranged at intervals along the slider movement direction, with a total of ten holes, corresponding to different pelletizing gap settings. The first support frame 402 is connected to the base 101 to provide support for the first drive member 201. The first slider 403 is slidably connected to the first support frame 402 and fixedly connected to the first drive member 201. The first slider 403 can slide along the first support frame 402, driving the first drive member 201 and the cutting roller 202 to move, facilitating the adjustment of the gap between the cutting roller 202 and the die head 3022 to meet the needs of cutting pellets of different lengths. For materials with different hardness or viscosity, the best cutting effect can be obtained by adjusting the pelletizing gap. After one end of the limiting member passes through the first slider 403, it is inserted into the first support frame 402, which can fix the first slider 403 in the required position, prevent the slider from shifting during the cutting process, ensure the stability of the cutting gap, and improve the cutting accuracy.

[0037] like Figure 7As shown, the system further includes multiple leveling components, spaced apart between the first support frame 402 and the base 101. In this embodiment, there are four leveling components, evenly distributed circumferentially along the bottom surface of the first support frame 402, forming a four-point support leveling structure. Each leveling component includes a first rod 501 and a first nut 502. One end of the first rod 501 is inserted into the base 101 and rotatably connected to it. The first rod 501 is a common threaded rod, and its lower end is a smooth shaft section, rotatably connected to the upper surface of the base 101 via a thrust bearing. The first rod 501 can rotate around its own axis but cannot move axially. The other end of the first rod 501 is rotatably connected to the first support frame 402. A through hole is provided at a corresponding position on the bottom surface of the first support frame 402, and the other end of the first rod 501 is inserted into the through hole. The first nut 502 is rotatably connected to the base 101 and is sleeved on the outer circumference of the first rod 501, and is threadedly connected to the first rod 501. The first nut 502 is a hexagonal nut, forming a threaded transmission pair with the first rod 501. The first nut 502 is mounted on the base 101 through a thrust bearing and can rotate around its own axis. When the first nut 502 is rotated, since the first nut 502 is threadedly connected to the first rod 501 and the first rod 501 is axially limited, the first nut 502 moves along the axial direction of the first rod 501 while rotating, causing the corresponding position of the first support frame 402 to rise or fall. Multiple leveling components can be adjusted independently. By adjusting the height of each point, the first support frame 402 is kept horizontal, and the cutting roller 202 mounted on it is parallel to the end face of the die head 3022. This avoids inconsistent pellet lengths (long and short pellets) or uneven blade wear caused by the tilt of the cutting roller during pelleting, improving the consistency of pellet length and pelleting quality.

[0038] Furthermore, such as Figure 2As shown, the fixed pelletizing mechanism also includes an operating valve 305 and a screen changer 306. The operating valve 305 is connected to the side of the die assembly 302 opposite to the second opening. The operating valve 305 is a hydraulically driven three-way switching valve with two working positions: a normal production position and a discharge position. In the normal production position, the molten material flows to the die assembly 302 through the operating valve 305; in the discharge position, the molten material is directly discharged through the bypass outlet of the operating valve 305, without passing through the die assembly 302. The screen changer 306 is connected to the side of the operating valve 305 opposite to the die assembly 302. The screen changer 306 is a hydraulic plate-type screen changer 306, consisting of a screen changing body, a filter plate, and a hydraulic drive system. The filter plate is a multi-layer stainless steel wire mesh, selected according to the material purity requirements. When the filter becomes clogged, causing the melt pressure to exceed the set value, the hydraulic system drives the screen changing body to move, pushing out the dirty screen plate, while simultaneously moving the clean screen plate into the working position, achieving screen changing without stopping the machine. The screen changer 306 filters impurities and unmelted particles from the molten material, preventing impurities from clogging the die orifices. The start-up valve 305 can switch the material flow direction during the initial start-up stage (when the material temperature and flow rate are unstable) or when replacing the filter screen, allowing the initial material containing air bubbles, impurities, or uneven temperature to bypass the die head assembly 302 and be discharged directly, preventing unqualified material from entering the pelletizing chamber and ensuring stable product quality.

[0039] Furthermore, such as Figure 1 and Figure 2 As shown, it also includes an extruder 404 and a feed hopper 405. The extruder 404 is fixed to the base 101, and its outlet is connected to the screen changer 306 on the side opposite to the departure valve 305. The extruder 404 is a single-screw extruder. The barrel of the extruder 404 uses a combined electric heating and oil cooling temperature control system, and the temperature of each section of the barrel can be set independently. The outlet of the extruder 404 is connected to the inlet of the screen changer 306 via a flange. The feed hopper 405 is connected to the inlet of the extruder 404. The feed hopper 405 is a conical hopper made of stainless steel, with a screw feeder at the bottom. The feeding rate is controlled in conjunction with the speed of the extruder 404. The extruder 404 is fixed to the base 101, its outlet is connected to the screen changer 306, and its feed hopper 405 is connected to the inlet of the extruder 404. The feed hopper 405 is used to hold the raw materials and transport them to the extruder 404. The extruder 404 heats and melts the raw materials and pressurizes them to push them to the screen changer 306 and the die assembly 302, so as to realize the continuous feeding, melting and extrusion of the raw materials and ensure the continuity of the production process.

[0040] Furthermore, such as Figure 1 and Figure 2As shown, the system also includes a filter box 406, a centrifugal dewatering machine 407, a process water tank 410, and a storage tank 408. The filter box 406 is connected to the return water pipe 304. The filter box 406 has a stainless steel body and an internal stainless steel screen. Cooling water carrying particles enters the filter box 406 from the return water pipe 304. The particles are trapped by the screen, and the water flows through the screen into the lower part of the box. A conical hopper can be installed at the bottom of the filter box 406 to facilitate the collection of trapped particles. The centrifugal dewatering machine 407 receives the material filtered by the filter box 406. The centrifugal dewatering machine 407 is a horizontal screw discharge centrifuge. The particles trapped on the screen of the filter box 406 are collected and transported to the centrifugal dewatering machine 407 (via a screw conveyor), where surface moisture is removed under centrifugal force. The process water tank 410 is connected to both the filter box 406 and the centrifugal dewatering machine 407. The process water tank 410 is made of stainless steel and is used to collect the water filtered out by the filter box 406 and the water removed by the centrifugal dewatering machine 407. The water in the process water tank 410 passes through the pump body 411, heat exchanger, and filter before being reused as cooling water to supply the inlet pipe 303, achieving water recycling. The storage tank 408 is located below the discharge port of the centrifugal dewatering machine 407. The storage tank 408 is a square storage bin made of stainless steel. The dewatered finished particles fall into the storage tank 408 through the discharge port for temporary storage and are periodically packaged and transported. The filter box 406 is connected to the return water pipe 304, receiving and filtering the cooling water containing particles discharged from the pelletizing chamber, initially separating the particles from the water. The centrifugal dewatering machine 407 receives the particles filtered by the filter box 406 and dewaters them, reducing the moisture content of the finished particles. The process water tank 410 is connected to both the filter box 406 and the centrifugal dewatering machine 407, collecting the filtered water and the water extracted by centrifugation for recycling, thus saving water resources. The storage tank 408 is located below the discharge port of the centrifugal dewatering machine 407, receiving the dewatered finished particles for easy storage and transportation.

[0041] Furthermore, such as Figure 1 and Figure 2As shown, the system also includes a control panel 409, which is electrically connected to all the first heating elements 3025, all the first monitoring elements 3027, and the first flow meter 401. The control panel 409 is a PLC (Programmable Logic Controller) based automatic control system. The PLC host is a Siemens S7-1200 series. The control panel 409 is installed on the operating side of the equipment for easy parameter setting and status monitoring by operators. Based on the set temperature target value and the actual temperature feedback value, the control panel 409 uses a PID control algorithm to calculate the output power of each first heating element 3025, achieving closed-loop temperature control of the mold head 3022. When the first monitoring element 3027 detects that the temperature of the corresponding area of ​​the mold head 3022 is lower than the set lower limit, the control panel 409 increases the power of the first heating element 3025 in the corresponding area of ​​the mold head 3022; when the temperature is higher than the set upper limit, it decreases the power of the first heating element 3025. When the first flow meter 401 detects that the cooling water flow rate is lower than the set lower limit, the control system alarms to prevent the temperature of the mold head 3022 from running out of control due to insufficient cooling. The control panel 409 is electrically connected to all the first heating elements 3025, all the first monitoring elements 3027, and the first flow meter 401. The control panel 409 receives temperature signals from the die head 3022 collected by each of the first monitoring elements 3027 and inlet water flow signals collected by the first flow meter 401. Based on the temperature and flow data, it automatically adjusts the heating power of each of the first heating elements 3025 to achieve closed-loop control of the die head 3022 temperature. When the temperature is lower than the set threshold or the flow is abnormal, the control panel 409 can automatically alarm or adjust operating parameters to prevent the die orifice from freezing and clogging due to excessively low temperature or abnormal cooling, thereby improving the automation level and operational stability of the equipment.

[0042] The working process of the granulation equipment for processing foamed materials is as follows: Process parameters are set on the control panel 409. The first heating element 3025 is activated to preheat the die head 3022. The control panel 409 automatically controls the heating power based on the temperature feedback from the first monitoring element 3027. Simultaneously, cooling water circulation is initiated. Cooling water in the process water tank 410, after being temperature-adjusted by the pump body 411 and heat exchanger, enters the pelletizing chamber through the inlet pipe 303 and returns to the filter box 406 through the return pipe 304. The extruder 404 is started, and the start-up valve 305 is opened to the discharge position, allowing any remaining substandard materials (including air bubbles, cold material, or impurities) in the extruder 404 to be directly discharged through the screen changer 306 and the start-up valve 305, bypassing the die head 3022. After the temperature, flow rate, and pressure of the extruded material stabilize, the start-up valve 305 is closed to the normal production position, and the material enters the die head assembly 302. The molten material is extruded through the extrusion holes of the die head 3022 and enters the cooling water in the pelletizing chamber. The first driving component 201 drives the cutting roller 202 to rotate at high speed, cutting the extruded material strip into cylindrical particles. The cut particles flow out with the cooling water from the return water pipe 304 and enter the filter box 406 for solid-liquid separation. During the pelletizing process, the die head 3022 continuously dissipates heat to the pelletizing chamber side, and the first heating element 3025 in the temperature control plate 3021 continuously replenishes heat according to the instructions of the control panel 409 to offset the heat loss carried away by the cooling water. The heat insulation plate 3023 prevents excessive heat loss to the pelletizing chamber side. The first monitoring component 3027 monitors the temperature of each area of ​​the die head 3022 in real time. The first flow meter 401 monitors the inlet water flow in real time to ensure normal cooling water supply. The particles trapped in the filter box 406 are transported to the centrifugal dewatering machine 407, and the dewatered finished particles fall into the storage tank 408 for temporary storage. The filtered water is returned to the process water tank 410 and recycled after cooling and filtration.

[0043] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A granulation device for processing foamed materials, characterized in that, include: base(101); The movable pelletizing mechanism includes a first drive member (201), a cutting roller (202), and a first cover (203). The first drive member (201) is mounted on the base (101) and connected to the cutting roller (202). The first cover (203) is located between the first drive member (201) and the cutting roller (202). The fixed pelletizing mechanism includes a first cover (301), a die assembly (302), a water inlet pipe (303), and a water return pipe (304). The first cover (203) is connected to the first cover (301) and covers the first opening of the first cover (301) to form a pelletizing chamber. The second opening of the first cover (301) is connected to the die assembly (302). The third opening of the first cover (301) is connected to the water inlet pipe (303). The fourth opening of the first cover (301) is connected to the water return pipe (304). The first opening, the second opening, the third opening, and the fourth opening are distributed circumferentially around the first cover (301). The die assembly (302) includes a temperature control plate (3021), a die (3022), and a heat insulation plate (3023) stacked sequentially. The temperature control plate (3021) and the heat insulation plate (3023) are located on both sides of the die (3022). Both the heat insulation plate (3023) and the temperature control plate (3021) are provided with clearance holes, which correspond one-to-one with the extrusion holes of the die (3022). A first heating element (3025) is provided inside the temperature control plate (3021) for generating heat. A first monitoring element (3027) is provided inside the heat insulation plate (3023) for acquiring the temperature of the die (3022).

2. The granulation equipment for processing foamed materials according to claim 1, characterized in that, The temperature control plate (3021) has a plurality of first grooves (3024) on the side surface near the mold head (3022). The plurality of first grooves (3024) are distributed at intervals around the axis of the temperature control plate (3021), and each first groove (3024) is provided with a first heating element (3025). The heat insulation plate (3023) has a plurality of second grooves (3026) on the side surface near the mold head (3022). The plurality of second grooves (3026) are distributed at intervals around the axis of the heat insulation plate (3023), and the first monitoring element (3027) is provided in each second groove (3026).

3. The granulation equipment for processing foamed materials according to claim 2, characterized in that, It also includes a first flow meter (401), which is installed on the water inlet pipe (303) to obtain the flow rate of the fluid medium in the water inlet pipe (303).

4. The granulation equipment for processing foamed materials according to any one of claims 1-3, characterized in that, Also includes: The first support frame (402) is connected to the base (101); The first slider (403) is slidably connected to the first support frame (402) and is fixedly connected to the first drive member (201); The limiting member passes through the first slider (403) at one end and is inserted into the first support frame (402).

5. The granulation equipment for processing foamed materials according to claim 4, characterized in that, It also includes multiple leveling components, spaced apart between the first support frame (402) and the base (101), each of the leveling components comprising: The first rod (501) has one end inserted into the seat (101) and rotatably connected to the seat (101), and the other end rotatably connected to the first support frame (402); The first nut (502) is rotatably connected to the seat (101), and is sleeved on the outer periphery of the first rod (501), and is threadedly connected to the first rod (501).

6. The granulation equipment for processing foamed materials according to claim 5, characterized in that, The fixed pelletizing mechanism further includes: The start valve (305) is connected to the side of the mold assembly (302) opposite to the second opening; The screen changer (306) is connected to the side of the start-up valve (305) away from the head assembly (302).

7. The granulation equipment for processing foamed materials according to claim 6, characterized in that, Also includes: An extruder (404) is fixed on the base (101), and the outlet of the extruder (404) is connected to the side of the screen changer (306) away from the start-up valve (305). The feed hopper (405) is connected to the inlet of the extruder (404).

8. The granulation equipment for processing foamed materials according to claim 7, characterized in that, Also includes: The filter box (406) is connected to the return water pipe (304); Centrifugal dewatering machine (407) is used to receive the material filtered by the filter box (406); The process water tank (410) is connected to the filter box (406) and the centrifugal dewatering machine (407), respectively; The storage bin (408) is located below the discharge port of the centrifugal dewatering machine (407).

9. The granulation equipment for processing foamed materials according to claim 3, characterized in that, It also includes a control panel (409) which is electrically connected to all of the first heating elements (3025), all of the first monitoring elements (3027) and the first flow meter (401).

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