Modified PBAT granulation device

Abstract

The invention discloses a modified PBAT (poly (butyleneadipate-co-terephthalate)) granulation device, which relates to the technical field of extrusion granulation and is characterized by comprising a shell, a die head, a drawing mechanism, a scraping mechanism and a filtering mechanism. A cavity is formed in the shell, and a movable groove and a drawing groove are formed in the surface; the die head slides along the Y axis through a driving mechanism A, so that the die head is sealed or separated from the circulating part; the drawing mechanism moves along the X axis through a driving mechanism B to drive the supporting frame and the filtering plate to be drawn out or returned, and a scraping mechanism is arranged in the supporting frame and comprises a main scraper and an auxiliary scraper to scrape residual molten raw materials on the surface of the circulation part in a layered mode. The filter plate of the filter mechanism is quickly replaced through a sliding rail and a buckle mechanism, and dynamic sealing is formed between the die head and the filter plate through a sealing sleeve. Through the modular drawing design, the multi-stage scraping structure and the elastic buckle mechanism, the maintenance efficiency is remarkably improved, the material blocking risk is reduced, and the production continuity is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of extrusion granulation, and more specifically, to a modified PBAT granulation device. Background Art

[0002] In modern industrial production, granulation devices, as core equipment for converting molten raw materials into granular products, are widely used in multiple fields such as chemical industry, plastics, and rubber. In its working process, the die head plays a crucial role. It is a key component of the granulation device and is closely connected to the granulation device. The granulation device heats the raw materials to a molten state through internal heating, stirring, etc. systems, and the die head is responsible for extruding these molten raw materials in specific shapes and sizes. After subsequent cooling, pelletizing and other processes, the required granular products are finally formed. It can be said that the die head is the "last hurdle" for the granulation device to achieve raw material shaping, and its performance and state directly affect the product quality and production efficiency.

[0003] However, when processing molten raw materials, the molten raw materials need to be extruded and granulated through the die head. A filter plate is arranged inside the die head, and its function is to filter the molten raw materials to remove possible impurities therein to ensure the quality of the extruded pellets. However, with the continuous progress of production, the die head and the filter plate are extremely prone to clogging problems after long-term use. This is because the raw materials inevitably contain some impurities, and at high-temperature molten states, some raw materials may undergo carbonization, coking and other reactions. These substances gradually accumulate in the flow channels of the die head and the pores of the filter plate, resulting in poor circulation, ultimately causing clogging, and further affecting the granulation quality and production efficiency. Therefore, it is necessary to frequently stop the machine for maintenance.

[0004] In the design of traditional granulation devices, the connection structure between the die head and the granulation device is complex, and the disassembly of the die head and the filter plate requires the overall disassembly of the equipment. Specifically, the die head is tightly connected to the main part of the granulation device through multiple bolts, flanges and other components, and the filter plate is installed at a specific position inside the die head. When disassembling, not only a large number of fixing components need to be loosened in sequence, but also care needs to be taken to avoid damaging each precision component. The entire operation process is extremely complex, consuming a large amount of labor and time costs. And when replacing the filter plate, manual operation is required. After the granulation device runs, the temperature of the die head and the surrounding environment is extremely high. Even after stopping the machine, it will still remain at a high temperature for a long time. Operators performing the disassembly and installation work of the filter plate in such a high-temperature environment have great potential safety hazards. Even a slight carelessness may cause burns, or even trigger more serious safety accidents, posing a threat to the life safety of operators.

[0005] Therefore, in order to solve the above technical problems, the present application proposes a modified PBAT granulation device. Summary of the Invention

[0006] The object of the present invention is to provide a modified PBAT granulation device to solve the problems raised in the above-mentioned background art.

[0007] To achieve the above object, the present invention provides the following technical solutions: It includes a housing, a cavity is provided inside the housing, and an activity groove and a draw groove are provided on the surface of the housing, and the activity groove communicates with the cavity;

[0008] The die head is slidably arranged in the activity groove and is driven by a driving mechanism A to move along the Y-axis direction;

[0009] The draw mechanism is slidably connected in the draw groove and includes a support frame, a sealing plate, a slide rail and a filtering mechanism; the sealing plate is fixed to one side of the support frame close to the draw groove, and the size of the sealing plate is adapted to the draw groove to close the draw groove;

[0010] A hollow part is provided inside the support frame, the slide rails are symmetrically arranged on both sides of the hollow part, and the filtering mechanism is installed on the support frame through the slide rails;

[0011] A circulation part is provided at the position of the housing corresponding to the die head, a receiving cavity is provided on the support frame, and a scraping mechanism is installed in the receiving cavity for scraping the molten raw material on the surface of the circulation part;

[0012] The driving mechanism B is connected to the sealing plate and drives the draw mechanism to move along the X-axis direction.

[0013] Preferably, the scraping mechanism includes a secondary scraper and a primary scraper. The secondary scraper is connected to the receiving cavity through a torsion spring, is parallel to the Y-axis in the initial state, and the secondary scraper can abut against the surface of the circulation part for scraping;

[0014] The primary scraper is fixed to the receiving cavity, and a gap of 3-5 centimeters is reserved between the primary scraper and the circulation part in the Y-axis direction to form a stepped scraping structure.

[0015] Preferably, the primary scraper is a multi-level knife group, and the primary scraper group is symmetrically distributed on both sides of the secondary scraper to perform two-way scraping on the circulation part when the draw mechanism reciprocates.

[0016] Preferably, the filtering mechanism includes a sliding plate and a filter plate, and the sliding plate is fitted into the chute of the slide rail;

[0017] A snap mechanism is provided between the slide rail and the sliding plate, including a limit groove, a clamping block, an elastic member B and a card slot on the sliding plate, and the clamping block is elastically snapped into the card slot through the elastic member B to fix the filter plate.

[0018] Preferably, a sealing sleeve is fixed to one side of the die head close to the circulation part. When the driving mechanism A drives the die head to move, the sealing sleeve is nested on the filter plate to form a seal;

[0019] The sliding rail is slidably connected to the groove of the support frame. A guiding post and an elastic member A are arranged in the groove. When the die head presses the filter plate, the sliding rail compresses the elastic member A to make the filter plate tightly attached to the flow-through part.

[0020] Preferably, a guiding mechanism is arranged between the housing and the die head, including a guiding rod arranged along the Y-axis and a guiding groove on the die head; a guiding structure is arranged between the pulling slot and the pulling mechanism, including the cooperation of a sliding rail and a sliding groove.

[0021] Preferably, a nano-ceramic coating or a polytetrafluoroethylene coating is applied to the surfaces of the main scraper and the secondary scraper.

[0022] Preferably, a storage box is arranged at the bottom of the housing for collecting the molten raw materials scraped by the scraping mechanism.

[0023] Preferably, an elastic pad is arranged on the surface of the sliding plate for enhancing the sealing performance between the sealing sleeve and the filter plate.

[0024] Preferably, the elastic member A and the elastic member B are springs or rubber elastic bodies.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] Modular pulling design: By driving the pulling mechanism to move along the X-axis through the driving mechanism B, the support frame and the filter plate are integrally pulled out of the housing, and the replacement or cleaning of the filter plate can be completed without disassembling the equipment, greatly shortening the maintenance time and improving the production efficiency.

[0027] Step-by-step scraping structure: The main scraper and the secondary scraper work together. The main scraper pre-scrapes large residual raw materials, and the secondary scraper finely cleans through an elastic torsion structure, which not only protects the tool but also ensures the scraping effect; the design of the double-sided main scraper group further realizes two-way scraping and reduces residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0029] Figure 1 is the overall structural schematic diagram of the present invention;

[0030] Figure 2 is the overall state schematic diagram of installing the filter plate of the present invention;

[0031] Figure 3 is the structural schematic diagram of the pulling mechanism of the present invention;

[0032] Figure 4 is the structural schematic diagram of the buckle mechanism of the present invention;

[0033] Figure 5 Structural schematic diagram of the filtering mechanism of the present invention;

[0034] Figure 6 Structural schematic diagram of the cross-section of the housing from the top view angle of the present invention.

[0035] In the figure: 100, housing; 101, pull-out groove; 102, movable groove; 103, cavity; 200, die head; 201, sealing sleeve; 300, driving mechanism A; 400, driving mechanism B; 500, pull-out mechanism; 501, sealing plate; 502, support frame; 503, hollow part; 504, slide rail; 505, guide post; 506, elastic member A; 507, accommodating cavity; 508, chute; 600, scraping mechanism; 601, main scraper; 602, sub-scraper; 603, torsion spring; 700, snap mechanism; 701, block; 702, limit groove; 703, elastic member B; 704, card slot; 800, filtering mechanism; 801, slide plate; 802, filter plate; 803, elastic pad; 900, guiding mechanism; 901, guiding groove; 902, guiding rod; 1000, circulation part. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1 to 6 , a modified PBAT granulation device provided by the present invention: including a housing 100, a cavity 103 is opened inside the housing 100, and a movable groove 102 is opened on the surface of the housing 100. The movable groove 102 is communicated with the cavity 103 inside the housing 100. A die head 200 is arranged in the movable groove 102. The die head 200 is slidably arranged in the movable groove 102. As Figure 1 , 2 shown, the die head 200 can move in the Y-axis direction based on the housing 100. At the same time, a driving mechanism A 300 is arranged on the housing 100. The driving mechanism A 300 can be a hydraulic drive or a motor drive mechanism, mainly realizing the telescopic movement of the driving end of the driving mechanism A 300 along the Y-axis direction. The specific structure will not be elaborated here. The driving end of the driving mechanism A 300 is connected to the die head 200. The driving mechanism A 300 can drive the die head 200 to move in the Y-axis direction based on the housing 100 according to requirements, and a switch is arranged on the driving mechanism A 300 to control the telescopic movement of the driving end.

[0038] Figure 1The die head 200 shown in the figure is completely housed within the housing 100, which is the normal working state; Figure 2 The die head 200 shown in the figure extends out of the housing 100, which is the state during maintenance and repair.

[0039] As Figure 1 、 2 、and as shown in 6, a pull-out groove 101 is also formed on the surface of the housing 100. The pull-out groove 101 communicates with the internal cavity 103 of the housing 100. A pull-out mechanism 500 is arranged in the pull-out groove 101. The pull-out mechanism 500 is arranged corresponding to the position of the cavity 103 and is slidably connected within the housing 100. The pull-out mechanism 500 can move out of the housing 100 through the pull-out groove 101. Please refer to Figure 2 .

[0040] The pull-out mechanism 500 includes a sealing plate 501, a support frame 502, a hollow part 503, a connecting piece, a guide post 505, a resilient member A506, a receiving cavity 507, and a slide rail 504. The support frame 502 is arranged in the cavity 103 corresponding to the position of the pull-out groove 101 on the X-axis, and the support frame 502 can slide along the X-axis direction within the cavity 103. As Figure 1 shown, in the above normal working state, the sealing plate 501 is fixed to one side of the support frame 502 corresponding to the pull-out groove 101. The size of the sealing plate 501 is the same as that of the pull-out groove 101. The sealing plate 501 can completely block the pull-out groove 101 to prevent the cavity 103 from communicating with the outside through the pull-out groove 101.

[0041] To ensure the sealing of the die head 200 and the sealing plate 501 for the movable groove 102 and the pull-out groove 101, rubber melting pads can be provided on the die head 200 and the sealing plate 501 to achieve a better sealing effect.

[0042] As Figure 6 shown, a circulation part 1000 is arranged on the housing 100 corresponding to the position of the die head 200. There is a cavity 103 between the circulation part 1000 and the die head 200. The circulation part 1000 is the part connected to other granulation devices, mainly for introducing the molten raw material into the die head 200. A receiving cavity 507 is formed on the support frame 502, and a scraping mechanism 600 is arranged in the receiving cavity 507. The scraping mechanism 600 can scrape the surface of the circulation part 1000 (referring to the side of the circulation part 1000 close to the die head 200), and can scrape the molten raw material remaining on the surface of the circulation part 1000.

[0043] The scraping mechanism 600 can be a secondary scraper 602. The secondary scraper 602 is arranged in the accommodation cavity 507, and the secondary scraper 602 is connected to the accommodation cavity 507 through a torsion spring 603, which enables the secondary scraper 602 to rotate in the accommodation cavity 507 based on the torsion spring 603, and the torsion spring 603 can make the initial state of the secondary scraper 602 (i.e., the position of the secondary scraper 602 without being affected by other external forces, such as Figure 3 shown) parallel to the Y-axis. And when the support frame 502 is withdrawn from the housing 100, the secondary scraper 602 can abut against the surface of the flow-through part 1000 to scrape the molten raw material remaining on the surface of the flow-through part 1000. And when the resistance given by the molten raw material on the surface of the flow-through part 1000 to the secondary scraper 602 is too large, the secondary scraper 602 will compress the torsion spring 603 and deflect to avoid damaging the secondary scraper 602.

[0044] When there is too much molten raw material remaining on the surface of the flow-through part 1000, since it is necessary to protect the secondary scraper 602, the scraping effect of the secondary scraper 602 will be greatly reduced at this time. On the basis of the above, the scraping mechanism 600 further includes a primary scraper 601. The primary scraper 601 is fixed in the accommodation cavity 507. When the primary scraper 601 moves to the position corresponding to the flow-through part 1000, there is a gap in the Y-axis position with the flow-through part 1000, and this gap is adjusted according to actual needs. Different lengths of primary scrapers can be replaced for adjustment. Generally, the gap between the primary scraper 601 and the flow-through part 1000 is 3 - 5 centimeters. In this way, before the secondary scraper 602 contacts the surface of the flow-through part 1000, the primary scraper 601 can scrape the molten raw material remaining on the surface of the flow-through part 1000. And because there is a gap between the primary scraper 601 and the flow-through part 1000, the primary scraper 601 can only scrape part of the molten raw material, and then the subsequent secondary scraper 602 scrapes again. Through multi-level stepped scraping, while ensuring the scraping effect, it can also protect each scraper.

[0045] In addition, the primary scraper 601 can also be set as a knife group (not shown in the figure). By setting multiple levels of primary scrapers 601, the molten raw material on the surface of the flow-through part 1000 is scraped in layers to further protect the scraper.

[0046] On the basis of the above solution, in the accommodation cavity 507, on both sides of the secondary scraper 602, primary scrapers 601 or primary scraper groups 601 (not shown in the figure) can be provided. The primary scrapers 601 or primary scraper groups 601 on both sides are arranged in a mirror image. In this way, when the support frame 502 is withdrawn, the flow-through part 1000 can be scraped once, and when the support frame 502 returns to its position, the flow-through part 1000 can be scraped again, so as to achieve the purpose of multiple scrapings and better scraping effect.

[0047] The support frame 502 is provided with a hollow part 503. In the normal working state, when the support frame 502 is contracted inside the housing 100, the position of the hollow part 503 corresponds to that of the die head 200. A filtering mechanism 800 is arranged at the position of the support frame 502 corresponding to the hollow part 503. Slide rails 504 are respectively arranged on both sides of the support frame 502 corresponding to the hollow part 503. The filtering mechanism 800 is arranged on the support frame 502 through the slide rails 504. The filtering mechanism 800 includes a slide plate 801 and a filter plate 802. The slide plate 801 is arranged around the filter plate 802. The two sides of the slide plate

[0048] 801 slide in the corresponding slide rails 504 respectively. The slide rails 504 are provided with sliding grooves 508 corresponding to the slide plate 801. The size of the sliding grooves 508 is adapted to that of the slide plate 801. In this way, the filter plate 802 can be arranged on the support frame 502, and both sides of the filter plate 802 are unobstructed.

[0049] A buckle mechanism 700 is jointly arranged on the slide rails 504 and the filter plate 802. The buckle mechanism 700 includes a clamping block 701, a limiting groove 702, an elastic member B703 and a clamping groove 704. One or more limiting grooves 702 are opened on the slide rails 504. The limiting grooves 702 communicate with the sliding grooves 508, and a clamping block 701 is arranged in the limiting grooves 702. The clamping block 701 can slide in the limiting grooves 702, and an elastic member B703 is arranged between the clamping block 701 and the limiting grooves 702. Without the influence of other external forces, the clamping block 701 protrudes from the limiting grooves 702 under the support of the elastic member B703; a clamping groove 704 corresponding to the limiting grooves 702 is arranged on the slide plate 801. The clamping block 701 is slidably arranged in the clamping groove 704. As Figure 4 shown, a slope is arranged at one end of the clamping block 701 away from the elastic member B703. The slope of the clamping block 701 corresponds to the insertion direction of the slide plate 801. In this way, when the slide plate 801 is inserted, the slide plate 801 will squeeze the slope of the clamping block 701, so that the clamping block 701 is subjected to pressures in the Y-axis and X-axis directions, thereby causing the clamping block 701 to squeeze the elastic member B703 and contract into the limiting grooves 702. The clamping block 701 abuts against the surface of the slide plate 801 under the action of the elastic member B703 until the clamping block 701 corresponds to the clamping groove 704 on the slide plate 801, and the clamping block 701 will be stuck in the clamping groove 704, thereby supporting the slide plate 801 and the filter plate 802. If it is necessary to remove the filter plate 802, or the filter plate 802 is not installed in the appropriate position, continue to squeeze the slide plate 801 to make the slide plate 801 continue to move in the Z-axis direction. At this time, the moving principle of the clamping block 701 is the same as above.

[0050] Since it is necessary to be close and sealed between the flow-through part 1000, the filter plate 802 and the die head 200 during the granulation process, therefore, as Figure 6As shown in the figure, a sealing sleeve 201 is fixed on one side of the die head 200 close to the flow-through part 1000. The sealing sleeve 201 is nested with the filter plate 802. When the driving mechanism A300 drives the die head 200 to move towards the filter plate 802, the sealing sleeve 201 can be fitted onto the filter plate 802 as the die head 200 moves. The sealing sleeve 201 can wrap the filter plate 802, thereby forming a seal between the die head 200 and the filter plate 802.

[0051] On the basis of the above, as Figure 3 shown in the figure, a groove is provided at the position of the support frame 502 corresponding to the slide rail 504. The slide rail 504 is slidably connected in the groove. The slide rail 504 slides along the Y-axis direction in the groove, and a plurality of guide posts 505 are arranged in the groove. The slide rail 504 is slidably connected in the groove through the plurality of guide posts 505, and an elastic member A506 is further arranged between the groove and the slide rail 504. The elastic member A506 can keep the slide rail 504 in a position without being affected by other external forces.

[0052] When the driving mechanism A300 drives the die head 200 to move towards the filter plate 802, the sealing sleeve 201 abuts against the slide plate 801, squeezing the filter plate 802 to move in the Y-axis direction, causing the slide rail 504 to squeeze the elastic member A506, driving the filter plate 802 to approach the flow-through part 1000. A structure similar to the sealing sleeve 201 (not shown in the figure) can also be provided on the flow-through part 1000 to seal between the filter plate 802 and the flow-through part 1000.

[0053] Since the adhesion of the molten raw material between the filtering mechanism 800 and the flow-through part 1000 is relatively large, if the support frame 502 is manually pulled, it is not only very laborious but also dangerous. A driving mechanism B400 can be provided on the housing 100, as Figure 1 、 2 shown in the figure. The driving end of the driving mechanism B400 expands and contracts along the X-axis direction. The driving end of the driving mechanism B400 is connected to the sealing plate 501. The driving mechanism B400 can drive the pulling mechanism 500 to move in the X-axis direction.

[0054] On the basis of the above solution, in order to make the sliding between the die head 200 and the housing 100 more stable, a guiding mechanism 900 is provided between the housing 100 and the die head 200. The guiding mechanism 900 includes a guiding groove 901 and a guiding rod 902. The guiding rod 902 is installed in the housing 100. There can be multiple guiding rods 902, which are evenly installed in the housing 100, and the guiding rods 902 are installed in the direction of the Y-axis. The guiding groove 901 is opened on the die head 200, and the guiding groove 901 is opened at a position corresponding to the guiding rod 902. The number of the guiding grooves 901 is also the same as that of the guiding rods 902. The guiding rod 902 is slidably connected with the corresponding guiding groove 901. Through the cooperation of the guiding groove 901 and the guiding rod 902, the die head 200 can slide more stably in the moving groove 102, enhancing the sliding effect of the die head 200.

[0055] In addition, a device similar to the guiding mechanism 900 can also be provided on the pulling mechanism 500 and the pulling groove 101, which can make the pulling mechanism 500 move more stably, and details are not described here.

[0056] When granulation starts, the molten raw material enters the housing 100 through the circulation part 1000, is filtered by the filter plate 802 to remove impurities, and then flows into the die head 200 for plasticity. Other structural diagrams of the granulation device are not shown in the figures, and reference can be made to the prior art, and details are not described here.

[0057] During long-term granulation, impurities filtered out will accumulate in the filter plate 802. Therefore, it is necessary to clean the filter plate 802 or replace it with a new one. Pause the granulation process. Drive the die head 200 to move in the Y-axis direction through the driving mechanism A300 to separate the die head 200 from the filter plate 802; then drive the pulling mechanism 500 to move through the driving mechanism B400, so that the support frame 502 moves along the X-axis direction and moves out of the pulling groove 101 to the outside. While the driving mechanism B400 drives the support frame 502 and the filter plate 802 to move, the scraping mechanism 600 simultaneously scrapes the molten raw material remaining on the circulation part 1000.

[0058] And different from the traditional method of opening the die head, in this solution, the filter plate 802 is directly taken out from the housing 100, which can avoid the die head 200 losing temperature and prevent the problem of the molten raw material in the channel of the die head 200 from condensing.

[0059] In some of the above embodiments, the molten raw material is scraped by the secondary scraper 602; in some of the above embodiments, the molten raw material is scraped by the secondary scraper 602 and the primary scraper 601; in some of the above embodiments, the molten raw material is scraped by the secondary scraper 602 and the primary scraper 601 group.

[0060] In addition, a storage box (not shown in the figure) can be provided at the bottom of the housing 100 for collecting the raw materials scraped off by the scraping mechanism 600. In addition, the outer surfaces of the main scraper 601, the main scraper 601 group, and the auxiliary scraper 602 can be coated with a nano-ceramic coating (such as CrAlN) or a polytetrafluoroethylene (PTFE) coating to reduce the adhesion of the PBAT melt.

[0061] After the support frame 502 with the filter plate 802 is pulled out of the housing 100, a new filter plate 802 is inserted by aligning it with the chute 508 on the slide rail 504. The filter plate 802 to be replaced is under pressure and will squeeze the clamping block 701. After the clamping block 701 shrinks into the limit groove 702, the new filter plate 802 will extrude the filter plate 802 to be replaced out of the chute 508 in the Z-axis direction. At the same time, the installation of the new filter plate 802 is completed, improving the replacement efficiency of the filter plate 802 and eliminating the need for manual contact with the filter plate 802 to be replaced. Since the surface of the replaced filter plate 802 may be hot, it can protect the operator. In addition, the surface of the flow-through part 1000 can be cleaned, facilitating the installation of the new filter plate 802 and reducing the problem of equipment damage caused by material blockage.

[0062] It should be noted that the housing 100 is generally mounted on other devices, so there is enough distance between the housing 100 and the ground. A container for collecting the replaced filter plate 802 can be placed below the housing 100.

[0063] After the installation of the new filter plate 802 is completed, the driving mechanism B400 drives the support frame 502 and the new filter plate 802 to move into the housing 100. Then, the driving mechanism A300 drives the die head 200 to move towards the flow-through part 1000 until it touches the new filter mesh, and at the same time, a seal is formed between the sealing sleeve 201 and the filter plate 802. Then, under the extrusion of the die head 200 and the sealing sleeve 201, the filter plate 802 squeezes the elastic member A506 through the slide rail 504, driving the filter plate 802 to move slightly towards the flow-through part 1000 until the filter plate 802 touches the surface of the flow-through part 1000 and forms a seal. At this time, the replacement of the filter plate 802 is completed, which is more convenient and faster compared with the prior art. To improve the sealing performance between the sealing sleeve 201 and the filter plate 802, an elastic pad 803 can be provided on the surface of the slide plate 801, and the elastic pad 803 can be a rubber pad.

[0064] The elastic member A506 and the elastic member B703 can be rubber pads, springs, or other elastic components. The elastic member A506 and the elastic member B703 can be the same component or different components.

[0065] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A die head structure for granulation, characterized in that: It includes a housing (100), a cavity (103) is provided inside the housing (100), and an activity groove (102) and a drawing groove (101) are provided on the surface of the housing (100), and the activity groove (102) and the drawing groove (101) are both communicated with the cavity (103); The die head (200) is arranged in the housing (100) through the activity groove (102). A driving mechanism A (300) is fixed on the housing (100), the driving end of the driving mechanism A (300) is connected to the die head (200), and the die head (200) slides in the activity groove (102) through the driving mechanism A (300); The drawing mechanism (500) is slidably connected in the drawing groove (101), and the drawing mechanism (500) includes a support frame (502), a sealing plate (501), a slide rail (504) and a filtering mechanism (800); the sealing plate (501) is fixed on one side of the support frame (502) close to the drawing groove (101), and the size of the sealing plate (501) is adapted to the drawing groove (101) to close the drawing groove (101); A hollow part (503) is provided in the support frame (502), the slide rails (504) are symmetrically arranged on both sides of the hollow part (503), and the filtering mechanism (800) is arranged on the support frame (502) through the slide rails (504); the filtering mechanism (800) includes a slide plate (801) and a filter plate (802), and the slide plate (801) is fitted in the chute (508) of the slide rail (504); A circulation part (1000) is provided on the housing (100) corresponding to the position of the die head (200), a receiving cavity (507) is arranged on the support frame (502), and a scraping mechanism (600) is arranged in the receiving cavity (507), and the scraping mechanism (600) is used for scraping the molten raw material on the surface of the circulation part (1000); A driving mechanism B (400) is further arranged on the housing (100), and the driving end of the driving mechanism B (400) is connected to the sealing plate (501).

2. The die head structure for granulation according to claim 1, wherein: The scraping mechanism (600) includes a main scraper (601) and a secondary scraper (602); The main scraper (601) is fixed in the receiving cavity (507); the secondary scraper (602) is connected to the receiving cavity (507) through a torsion spring (603), and the secondary scraper (602) rotates in the receiving cavity (507) through the torsion spring (603).

3. The die head structure for granulation according to claim 1, wherein: A snap mechanism (700) is provided between the slide rail (504) and the slide plate (801). The snap mechanism (700) includes a latch block (701), a limit groove (702), an elastic member B (703), and a card slot (704). The limit groove (702) is formed on the slide rail (504), and the latch block (701) is slidably connected in the limit groove (702), and the latch block (701) is connected to the limit groove (702) through the elastic member B (703); The card slot (704) is formed on the slide plate (801), and the position and quantity of the card slot (704) correspond to those of the limit groove (702); The latch block (701) is snapped into the card slot (704) through the elastic member B (703).

4. A die head structure for granulation according to claim 1 or 3, characterized in that: A sealing sleeve (201) is fixed on one side of the die head (200) close to the circulation part (1000). The sealing sleeve (201) is arranged corresponding to the position of the filter plate (802), and the sealing sleeve (201) is nested with the filter plate (802); The slide rail (504) is arranged in a groove (509) of the support frame (502). A guide post (505) and an elastic member A (506) are arranged in the groove (509). The guide post (505) penetrates through the slide rail (504), and the guide post (505) is slidably connected with the slide rail (504). The slide rail (504) is slidably arranged in the groove (509) through the guide post (505), and the elastic member A (506) is arranged between the guide post (505) and the slide rail (504).

5. A die head structure for granulation according to any one of claims 1-4, characterized in that: A guiding mechanism (900) is provided between the housing (100) and the die head (200). The guiding mechanism (900) includes a guiding rod (902) and a guiding groove (901). The guiding rod (902) is fixed in the housing (200), and the guiding groove (901) is formed on the die head (200).

6. The die head structure for granulation according to claim 2, wherein: The surfaces of the main scraper (601) and the secondary scraper (602) are coated with a nano-ceramic coating or a polytetrafluoroethylene coating layer.

7. A die head structure for granulation according to any one of claims 1 - 6, characterized in that: A storage box is arranged at the bottom of the housing (100) for collecting the molten raw materials scraped by the scraping mechanism (600).

8. A die head structure for granulation according to any one of claims 4, 5 or 7, characterized in that: An elastic pad (803) is arranged on the surface of the slide plate (801) for enhancing the sealing performance between the sealing sleeve (201) and the filter plate (802).

9. A die head structure for granulation according to any one of claims 2 or 6, characterized in that: The main scraper (601) is a multi-level cutter group, and the main cutter group is mirror-symmetrically arranged on both sides of the secondary scraper (602).

10. A modified PBAT granulation device, characterized in that, It includes the die head structure according to any one of claims 1-9.

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