Pelletizing device and polyamide resin pelletizing method enabling rapid cooling molding

Abstract

The application relates to the technical field of plastic particle manufacturing, and discloses a granulating device capable of realizing rapid cooling forming and a polyamide resin granulating method, which comprises an extruder, the extruding end of the extruder is fixedly installed with a forming tool, the output end of the forming tool is fixedly installed on a cutting assembly, a water cooling assembly is arranged on the forming tool, the output end of the water cooling assembly is connected with a spraying tool, and the spraying tool is arranged on the cutting assembly. The driving spraying tool opens a water outlet, the spraying opening of the spraying tool is aligned with a cutting point, when the cutting assembly cuts the material column, the spraying tool sprays cooling water on the point, the position of the spraying tool remains unchanged, the spraying direction of the spraying tool remains unchanged, with the continuous rotation of the cutting assembly, the spraying tool flushes the whole cutting part of the cutting assembly, the residual material in the material column is prevented from being retained on the cutting assembly during cutting, the residual material is prevented from being hardened to blunt the cutting assembly and affect the cutting of the cutting assembly on the material column.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic particle manufacturing, in particular to a granulating device capable of realizing rapid cooling forming and a polyamide resin granulating method. BACKGROUND

[0002] At present, the granulating technology has been widely applied in medicine, food, building materials, chemical industry, metallurgy and other industries, and the granulating technology itself is constantly innovated, developed and improved in the application process, and various different granulating methods have been created. Due to the different needs of various industries for granular products, different granulating methods are used, and the granulating device has also developed rapidly.

[0003] According to different mechanisms, the granulating method can be divided into agglomeration granulating method, fluidized granulating method, extrusion granulating method, extrusion granulating method, crushing granulating method, melting granulating method and spray granulating method. Among them, the extrusion granulating method is to mix the material powder and the binder in the container and make soft material, and then put it into the hole plate or screen (plate) with a certain pore size, and make it pass through the screen hole under the action of extrusion force, and finally get uniform particles through appropriate shaping process.

[0004] At present, the mixed material is mixed by a double-screw extruder or a single-screw extruder, then melted by a heating unit, and extruded through a hole plate or screen (plate) by using a screw feed, and at the same time cut off by a cutter, so as to form granular material. However, the hardness of the molten material is low when it is extruded, and the blade is easy to adhere to the blade when it is cut. After water cooling, part of the components in the molten material are solidified on the surface of the blade, causing the blade edge to be blunt, which affects the shape of the granular material formed by the blade cutting.

[0005] At present, there is no effective solution to the problems in the related art. SUMMARY

[0006] (I) Technical problems to be solved

[0007] In view of the deficiencies of the prior art, the present application provides a granulating device capable of realizing rapid cooling forming and a polyamide resin granulating method, which solves the problem that the blade is easy to adhere to the blade when cutting, and after water cooling, part of the components in the molten material are solidified on the surface of the blade, causing the blade edge to be blunt, which affects the shape of the granular material formed by the blade cutting.

[0008] (II) Technical solutions

[0009] To solve the above-mentioned blade cutting, easy to adhere to the blade, after water cooling, resulting in part of the molten material solidified on the surface of the blade, resulting in dull phenomenon, affect the shape of the particle formed by the cutting blade technical problem, the present application provides the following technical solutions:

[0010] The granulating device capable of realizing rapid cooling forming includes an extruder, an extrusion end of the extruder is fixedly installed with a forming tool, an output end of the forming tool is fixedly installed on a cutting assembly, a water cooling assembly is arranged on the forming tool, an output end of the water cooling assembly is connected with a spraying tool, and the spraying tool is arranged on the cutting assembly.

[0011] The extruder is used for sending the mixed material into the forming tool after forming the molten material, and in the process of translation of the molten material in the forming tool, the molten material sequentially passes through indirect water cooling and coating cooling to form a preliminarily hardened material column under the action of the water cooling assembly, and then enters the cutting assembly, when the cutting assembly rotates to cut the material column, the cutting assembly synchronously drives the spraying tool to open to spray water on the cutting position of the cutting assembly, with the rotation of the cutting assembly, the spraying tool continuously sprays water to flush the cutting assembly, and then the cutting assembly drives the spraying tool to hide to close the spraying tool and provide a movement space for the rotation of the cutting assembly.

[0012] Preferably, the forming tool includes a flow collection plate, a flow distribution cone is fixedly installed on one side of the flow collection plate, a plurality of forming pipes are arranged on the flow collection plate, a coating assembly is fixedly installed at an output end of the forming pipe, one end of the coating assembly penetrates through the cutting assembly and is flush with an inner wall of the cutting assembly, and the material column enters the cutting assembly after contacting water in the coating assembly.

[0013] Preferably, the coating assembly includes a coating block, a coating cavity is opened in the coating block, guide rollers are arranged at the upper part and the lower part of the coating cavity, and the guide rollers are used for guiding the material column into the cutting assembly.

[0014] Preferably, the water cooling assembly includes a cooling pipe, the cooling pipe is wound outside the forming pipe, the cooling pipe is in communication with the coating cavity, and the coating cavity is in communication with the spraying tool.

[0015] Preferably, the injection tooling comprises a base column fixedly mounted on the protective cover, the protective cover is fixedly mounted on the extruder, the base column is in communication with the cladding cavity, and one end of the base column penetrates and is slidingly fitted with an injection head, the injection head is provided with an injection cavity, and the inner cavity bottom of the base column is fixedly mounted with a hollow frame, the hollow frame is fixedly mounted with a closed water ring, one end of the injection head is slidingly fitted with the closed water ring, and the end is fixedly mounted with a spring, one end of the spring is fixedly mounted on the inner wall of the base column, and the closed water ring is provided with an open water through groove in communication with the injection cavity.

[0016] Preferably, the cutting assembly comprises a driving motor, the output shaft of the driving motor is fixedly mounted with a cutter column, the cutter column is provided with a shearing cutter, the cutter column is rotationally mounted in the shearing cavity so that the shearing cutter is attached to the inner wall of the shearing cavity, and one end of the cutter column penetrates the shearing cavity and is fixedly mounted with a driving tooling, the driving tooling is used for driving the injection head to move along the central axis of the base column.

[0017] Preferably, the driving tooling comprises a main driving disc and a driving disc, the main driving disc is provided with a main driving protrusion;

[0018] The driving disc is provided with a mounting strip on the upper portion, the mounting strip is fixedly mounted on the injection head, and the driving disc is provided with a receiving ring on one side to cooperate with the main driving protrusion, so that the position of the injection head relative to the closed water ring is changed.

[0019] Preferably, the receiving ring comprises a base ring, the base ring comprises a plurality of receiving groups, each receiving group comprises a transition zone, and from the transition zone as a starting point, the transition zone is sequentially followed by an injection zone and a receiving zone along the rotation direction of the main driving protrusion, the transition zone and the injection zone and the injection zone and the receiving zone are both transitioned by a circular arc surface, and the transition zone and the receiving zone of adjacent two groups of the receiving groups are connected.

[0020] A polyamide resin granulation method, the mixture comprising polyamide resin is put into the extruder, the melt is formed by the melting of the extruder, the melt is injected into the forming pipe, and after the preliminary cooling of the cooling pipe, the melt is further cooled by the cooling water in the cladding cavity, so that the melt is fully hardened, and finally the melt is cut by the shearing cutter in the shearing cavity to form the granules.

[0021] (Three) beneficial effects

[0022] Compared with the prior art, the present application provides a granulation device and a polyamide resin granulation method that can realize rapid cooling molding, and has the following beneficial effects:

[0023] 1、The present application rotates the cutting assembly to contact the column, at this time, the jet tool is preliminarily displaced synchronously, so that the jet tool opens the water outlet, the jet port of the jet tool is aligned with the cutting point, when the cutting assembly cuts the column, the jet tool sprays cooling water at the point, since the position of the jet tool remains unchanged, the jet direction is unchanged, as the cutting assembly continues to rotate, the jet tool flushes the entire cutting part of the cutting assembly, avoiding the residual material inside the column from remaining on the cutting assembly during cutting, causing the cutting assembly to be passivated after the residual material hardens, affecting the cutting of the cutting assembly on the column.

[0024] 2、The cooling pipe is wound on the outer surface of the forming pipe, and the cooling pipe is in communication with the covering cavity, the covering cavity is in communication with the jet tool, the cooling pipe is wound on the outer surface of the forming pipe, so that the cooling pipe indirectly cools the molten material in the forming pipe, so that the molten material forms a column with a certain hardness in the forming pipe, and then when the column enters the covering cavity, since the cooling pipe is in communication with the covering cavity, the covering cavity is filled with cooling water, and then the preliminarily cooled column is cooled again, so that the column is completely cooled and hardened, the column with a certain hardness is formed after the molten material is pre-cooled by the cooling pipe, which is convenient for covering cooling, so as to ensure that the hardness during cutting is sufficient, and cutting is facilitated, and deformation during cutting is avoided to cause the cutting surface to change.

[0025] 3、The shearing knife is attached to the inner wall of the shearing cavity, so that the shearing knife, the shearing cavity and the cutter column form a closed area during rotation of the shearing knife, the cooling water sprayed by the spray head and the particles sheared are all retained in the closed area, and during one rotation, the plurality of spray heads spray cooling water to the closed area in turn, so that the particles are immersed in the cooling water and are impacted by the spray of the spray head, avoiding adhesion of the particles, and the position of the closed area changes, so that the particles are turned over in the area, so that the cutting surface is further hardened, thereby avoiding deformation of the particles. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the installation structure diagram of the extruder and the cutting assembly of the present application;

[0027] Figure 2 It is the partial structure schematic diagram of the forming tool of the present application;

[0028] Figure 3 It is the cooperation structure diagram of the forming tool and the water cooling assembly of the present application;

[0029] Figure 4 Part of the molding tool and water cooling assembly matching structure of the present application is shown in the figure;

[0030] Figure 5 The cross-sectional view of the injection tool of the present application is shown in the figure;

[0031] Figure 6 The schematic diagram of the partial structure of the driving tool of the present application is shown in the figure;

[0032] Figure 7 The cross-sectional view of the coating assembly of the present application is shown in the figure;

[0033] Figure 8 The schematic diagram of the driving tool structure of the present application is shown in the figure.

[0034] In the figure: 1, extruder; 2, molding tool; 201, current collector plate; 202, flow divider cone; 203, molding tube; 204, coating assembly; 2041, coating block; 2042, coating cavity; 2043, guide roller; 3, cutting assembly; 301, driving motor; 302, cutting knife column; 303, shearing knife; 304, shearing cavity; 4, water cooling assembly; 401, cooling pipe; 5, injection tool; 501, base column; 502, protective cover; 503, injection head; 504, injection cavity; 505, hollow frame; 506, closed water ring; 507, open water through slot; 508, spring; 6, driving tool; 601, main driving disc; 602, main driving protrusion; 603, driving disc; 604, mounting strip; 605, receiving ring; 6051, base ring; 6052, transition area; 6053, injection area; 6054, storage area. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0036] As introduced in the background, the deficiencies in the prior art exist, in order to solve the above technical problems, the present application proposes a granulating device capable of realizing rapid cooling molding and a polyamide resin granulating method.

[0037] Embodiment one:

[0038] Please refer to Figures 1-8The granulating device and polyamide resin granulating method capable of realizing rapid cooling forming, comprising an extruder 1, an extruding end of the extruder 1 being fixedly installed with a forming tool 2, an output end of the forming tool 2 being fixedly installed on a cutting assembly 3, and a water cooling assembly 4 being arranged on the forming tool 2, an output end of the water cooling assembly 4 being connected with a spraying tool 5, and the spraying tool 5 being arranged on the cutting assembly 3;

[0039] The extruder 1 is used for sending the mixed material into the forming tool 2 after the mixed material is formed into molten material, and the molten material is sequentially subjected to indirect water cooling and covering cooling to form a preliminarily hardened material column in the water cooling assembly 4 during the translation of the molten material in the forming tool 2, and then enters the cutting assembly 3, when the cutting assembly 3 rotates to cut the material column, the cutting assembly 3 synchronously drives the spraying tool 5 to open to spray water on the cutting position of the cutting assembly 3, and when the cutting assembly 3 rotates, the spraying tool 5 continuously sprays water to flush the cutting assembly 3, and then the cutting assembly 3 drives the spraying tool 5 to hide to close the spraying tool 5 and provide a movement space for the rotation of the cutting assembly 3.

[0040] The extruder 1 is preferably a double-screw extruder.

[0041] After the mixed material is mixed, the mixed material is put into the extruder 1, the mixed material is melted by the extruder to form viscous molten material, and the molten material is extruded into the forming tool 2 by the continuous extrusion of the extruder, since the water cooling assembly 4 is arranged on the forming tool 2, when the molten material passes through the forming tool 2, the molten material is preliminarily hardened after being indirectly cooled by the water cooling assembly 4, and then the molten material is immersed in the cooling water in the water cooling assembly 4 to achieve covering cooling and complete hardening, thereby facilitating the transmission and shearing of the columnar molten material (referred to as material column), when the completely hardened material column enters the cutting assembly 3, the cutting assembly 3 cuts the material column to form granular molten material, thereby realizing the granular state of the mixture;

[0042] Wherein, in the process of rotating the cutting assembly 3 to cut the column to form the particles, the spray port of the spray tool 5 is oriented to the direction of the discharge port of the column, and is staggered with the cutting point of the column, when the cutting assembly 3 is rotated to contact the column, at this time, the spray tool 5 is driven to preliminarily displace, so as to drive the spray tool 5 to open the water outlet, and align the spray port of the spray tool 5 with the cutting point, so that when the cutting assembly 3 cuts the column, the spray tool 5 sprays the cooling water at the point, since the position of the spray tool 5 remains unchanged at this time, the spray direction remains unchanged, with the continuous rotation of the cutting assembly 3, the spray tool 5 flushes the entire cutting part of the cutting assembly 3, so as to avoid that the residual material in the column is retained on the cutting assembly 3 during cutting, and causes the cutting assembly 3 to be passivated after the residual material is hardened, and affects the cutting of the column by the cutting assembly 3.

[0043] Further, for the above-mentioned forming tool 2, the forming tool 2 comprises a flow collecting plate 201, one side of the flow collecting plate 201 is fixedly provided with a flow distribution cone 202, a plurality of forming pipes 203 are arranged on the flow collecting plate 201, the output end of the forming pipe 203 is fixedly provided with a coating assembly 204, one end of the coating assembly 204 penetrates the cutting assembly 3 and is flush with the inner wall of the cutting assembly 3, the column enters the cutting assembly 3 after contacting with water in the coating assembly 204;

[0044] So that the molten material is in a viscous state, with the continuous extrusion of the extruder 1, the molten material is collected at the specified position of the flow collecting plate 201 under the action of the flow distribution cone 202, since a plurality of forming pipes 203 are communicated at these positions on the flow collecting plate 201, with the pressure of the extruder 1, the molten material enters the forming pipe 203, and the water cooling assembly 4 cools the surface of the forming pipe 203, so that the molten material realizes preliminary cooling after entering the forming pipe 203 to form a column with a certain hardness, and then the column with a certain hardness enters the coating assembly 204, so that the column realizes complete cooling after being coated and cooled by the cooling water in the coating assembly 204, so that the column is fully hardened, and then is cut into particles in the cutting assembly 3.

[0045] Further, for the above-mentioned coating assembly 204, the coating assembly 204 comprises a coating block 2041, the coating block 2041 is provided with a coating cavity 2042, the upper part and the lower part of the coating cavity 2042 are provided with guide rollers 2043, and the guide rollers 2043 are used for guiding the column to enter the cutting assembly 3.

[0046] The guide rollers 2043 are mainly used for guiding the column to pass through the coating cavity 2042, and the upper and lower guide rollers 2043 make the surface of the column more flat, so that the particles cut from the column are more regular.

[0047] Further, for the water cooling assembly 4, the water cooling assembly 4 comprises a cooling pipe 401, the cooling pipe 401 is wound on the outer surface of the forming pipe 203, and the cooling pipe 401 is communicated with the cladding cavity 2042, the cladding cavity 2042 is communicated with the injection tool 5, the cooling pipe 401 is wound on the outer surface of the forming pipe 203, so that the cooling pipe 401 indirectly cools the molten material in the forming pipe 203, so that the molten material forms a column with a certain hardness in the forming pipe 203, and then when the column enters the cladding cavity 2042, since the cooling pipe 401 is communicated with the cladding cavity 2042, the cladding cavity 2042 is filled with cooling water, and then the column which has been preliminarily cooled is secondarily cooled, so that the column is completely cooled and hardened, after the molten material is preliminarily cooled by the cooling pipe 401, the column with a certain hardness is formed, which is convenient for cladding cooling, so as to ensure that the hardness during cutting is sufficient, and cutting is facilitated, and deformation during cutting is avoided, so that the cutting surface is changed, and through the preliminary cooling of the molten material, the temperature change of the molten material has a buffer section, so that the molten material is not suddenly cooled, the outer surface of the molten material is quickly hardened, the internal part of the molten material cannot be conducted to a low temperature, the hardness of the column is insufficient, the flexibility is large, and effective cutting cannot be completed.

[0048] Further, for the injection tool 5, the injection tool 5 comprises a base column 501, the base column 501 is fixedly installed on the protective cover 502, and the protective cover 502 is fixedly installed on the extruder 1, the base column 501 is communicated with the cladding cavity 2042, and one end of the base column 501 penetrates and is slidably connected with an injection head 503, the injection head 503 is provided with an injection cavity 504, and a hollow frame 505 is fixedly installed at the bottom of the inner cavity of the base column 501, a water ring 506 is fixedly installed on the hollow frame 505, one end of the injection head 503 is slidably connected with the water ring 506, and a spring 508 is fixedly installed at the end, one end of the spring 508 is fixedly installed on the inner wall of the base column 501, and an open water through groove 507 is formed in the water ring 506, and the open water through groove 507 is used to communicate with the injection cavity 504.

[0049] The cutting assembly 3 comprises a driving motor 301, a cutter column 302 is fixedly installed on the output shaft of the driving motor 301, a shearing cutter 303 is arranged on the cutter column 302, the cutter column 302 is rotatably installed in a shearing cavity 304, so that the shearing cutter 303 is attached to the inner wall of the shearing cavity 304, and a driving tool 6 is fixedly installed at one end of the cutter column 302 penetrating the shearing cavity 304, and the driving tool 6 is used to drive the injection head 503 to move along the central axis of the base column 501.

[0050] When the material column reaching the cutting condition enters into the cutting assembly 3 from the coating cavity 2042, the driving motor 301 drives the cutter column 302 to rotate, and the shearing cutter 303 on the cutter column 302 shears the material column, thereby forming the granules;

[0051] When the cutter column 302 rotates to make the shearing cutter 303 contact the material column, the cutter column 302 synchronously drives the spray head 503 to translate along the central axis of the base column 501 by the driving tool 6 until the spray cavity 504 of the spray head 503 corresponds to the hot water channel 507, at which time the shearing cutter 303 contacts the material column, so that the shearing cutter 303 shears the material column, and the spray head 503 sprays the cooling water to the shearing cutter 303, on one hand, the shearing cutter 303 is washed by the sprayed cooling water, and at this time, the shearing cutter 303 rotates while the spray head 503 remains stationary, so that the spray head 503 washes the cutting part of the shearing cutter 303, avoiding the hardening of the residual material, affecting the sharpness of the shearing cutter 303, on the other hand, since the shearing cutter 303 is attached to the inner wall of the shearing cavity 304, the shearing cutter 303, the shearing cavity 304 and the cutter column 302 form a closed area during the rotation of the shearing cutter 303, and the cooling water sprayed by the spray head 503 and the granules sheared are retained in the closed area, and during the rotation of one turn, the plurality of spray heads 503 spray the cooling water to the closed area in turn, so that the granules are immersed in the cooling water, and the adhesion of the granules is avoided by the impact generated by the spray of the spray head 503, and the deformation of the granules is avoided by the change of the position of the closed area.

[0052] Further, the driving tool includes a main driving disc 601 and a driving disc 603, the main driving disc 601 is provided with a main driving protrusion 602, and the main driving disc 601 is fixedly installed on the cutter column 302;

[0053] The driving disc 603 is provided with an installation strip 604, the installation strip 604 is fixedly installed on the spray head 503, and one side of the driving disc 603 is provided with a receiving ring 605 for cooperating with the main driving protrusion 602, so that the position of the spray head 503 relative to the cooling water ring 506 is changed;

[0054] The receiving ring 605 comprises a base ring 6051, the base ring 6051 comprises a plurality of receiving groups, each of the receiving groups comprises a transition area 6052, and the transition area 6052 is sequentially followed by a spraying area 6053 and a receiving area 6054 along the rotation direction of the main driving protrusion 602, and the transition area 6052, the spraying area 6053 and the receiving area 6054 are all connected by arc surfaces, and the transition area 6052 and the receiving area 6054 of adjacent two groups of the receiving groups are connected.

[0055] The spraying and receiving principles of the spraying tool 5 will be described in combination with the specific structure of the receiving ring.

[0056] First of all, it should be noted that the heights of the transition area 6052, the spraying area 6053 and the receiving area 6054 are different, so when the main driving protrusion 602 contacts different areas, the receiving ring 605 will be displaced by different displacement amounts.

[0057] Therefore, when the driving motor 301 drives the cutter column 302 to rotate, the cutter column 302 synchronously drives the main driving disc 601 to rotate, so that the main driving protrusion 602 on the main driving disc 601 moves from the transition area 6052 to the spraying area 6053 after passing through the transition area 6052 on the receiving ring 605, and drives the base ring 6051 to translate, so that the base ring 6051 drives the spraying head 503 to move along the central axis of the base column 501 through the mounting strip 604, so that the spraying cavity 504 of the spraying head 503 is connected with the boiling water channel 507, and the cooling water in the inner cavity of the base column 501 is sprayed out from the spraying head 503.

[0058] When the main driving protrusion 602 on the main driving disc 601 moves from the spraying area 6053 to the receiving area 6054, the base ring 6051 drives the spraying head 503 to continue to move along the central axis of the base column 501 through the mounting strip 604, so that the spraying cavity 504 of the spraying head 503 is connected with the inner side of the closed water ring 506 after passing through the boiling water channel 507, so that the water inlet of the spraying cavity 504 is closed, and the spraying head 503 is gradually received in the base column 501, so that the spraying head 503 is connected with the inner wall of the shearing cavity 304, so as to provide a movement space for the rotation of the shearing cutter 303, and when the shearing cutter 303 passes through the position of the spraying head 503, the main driving protrusion 602 on the main driving disc 601 moves from the receiving area 6054 to the transition area 6052 under the action of the spring 508.

[0059] Further, the lower part of the shearing cavity 304 is provided with a discharge port.

[0060] Embodiment two:

[0061] A polyamide resin granulation method, which puts a mixture including polyamide resin into an extruder 1, forms a molten material by melting through the extruder 1, injects the molten material into a forming tube 203, performs preliminary cooling through a cooling tube 401, then enters a coating cavity 2042, performs coating cooling through cooling water in the coating cavity 2042, makes the molten material sufficiently harden, and finally enters a shearing cavity 304, so that a shearing cutter 303 shears the sufficiently hardened molten material to form granules.

[0062] While embodiments of the present application have been shown and described, it is to be understood that the embodiments described are only by way of example and that changes, modifications, substitutions and alterations can be made thereto without departing from the spirit and scope of the application.

Claims

1. A granulation device capable of rapid cooling and molding, comprising an extruder (1), characterized in that: The extrusion end of the extruder (1) is fixedly installed with a forming fixture (2), the output end of the forming fixture (2) is fixedly installed on the cutting assembly (3), and a water cooling assembly (4) is provided on the forming fixture (2). The output end of the water cooling assembly (4) is connected to a spraying fixture (5), and the spraying fixture (5) is provided on the cutting assembly (3). The extruder (1) is used to feed the mixture into the molding fixture (2) after it is formed into a molten material. As the molten material moves in the molding fixture (2), it passes through indirect water cooling and coating cooling in sequence under the action of the water cooling component (4) to form a pre-hardened material column. Then it enters the cutting component (3). When the cutting component (3) rotates to cut the material column, the cutting component (3) drives the spraying fixture (5) to open to spray water on the cutting position of the cutting component (3). As the cutting component (3) rotates, the spraying fixture (5) continuously sprays water to rinse the cutting component (3). Then the cutting component (3) drives the spraying fixture (5) to hide so that the spraying fixture (5) closes while providing movement space for the rotation of the cutting component (3). The spraying fixture (5) includes a base column (501), which is fixedly mounted on a protective cover (502), and the protective cover (502) is fixedly mounted on the extruder (1). One end of the base column (501) is connected to a spray head (503) which is slidably fitted. The spray head (503) has a spray chamber (504). A hollow frame (505) is fixedly mounted at the bottom of the inner cavity of the base column (501). A water-sealing ring (506) is fixedly mounted on the hollow frame (505). One end of the spray head (503) is slidably fitted with the water-sealing ring (506), and a spring (508) is fixedly mounted on that end. One end of the spring (508) is fixedly mounted on the inner wall of the base column (501). A water-opening groove (507) is opened on the water-sealing ring (506), and the water-opening groove (507) is used to communicate with the spray chamber (504). The cutting assembly (3) includes a drive motor (301), and a cutter column (302) is fixedly mounted on the output shaft of the drive motor (301). A shearing blade (303) is provided on the cutter column (302). The cutter column (302) is rotatably mounted in the shearing cavity (304) so ​​that the shearing blade (303) fits against the inner wall of the shearing cavity (304). One end of the cutter column (302) passes through the shearing cavity (304) and is fixedly mounted with a drive fixture (6). The drive fixture (6) is used for the cutter column (302) to drive the spray head (503) to move along the central axis of the base column (501). The drive fixture includes a main drive disk (601) and a drive disk (603), and a main drive protrusion (602) is provided on the main drive disk (601). The drive disc (603) has an installation strip (604) on its upper surface. The installation strip (604) is fixedly installed on the spray head (503). A receiving ring (605) is provided on one side of the drive disc (603) for cooperating with the main drive protrusion (602) to change the position of the spray head (503) relative to the water-closing ring (506).

2. The granulation device for rapid cooling and molding according to claim 1, characterized in that: The forming fixture (2) includes a flow collector (201), a flow divider cone (202) is fixedly installed on one side of the flow collector (201), a plurality of forming tubes (203) are provided on the flow collector (201), a coating component (204) is fixedly installed at the output end of the forming tube (203), one end of the coating component (204) penetrates the cutting component (3) and is flush with the inner wall of the cutting component (3), the material column enters the coating component (204) from the forming tube (203) and enters the cutting component (3) after contacting water.

3. The granulation device for rapid cooling and molding according to claim 2, characterized in that: The coating component (204) includes a coating block (2041), the coating block (2041) has a coating cavity (2042), and guide rollers (2043) are provided at the upper and lower parts of the coating cavity (2042). The guide rollers (2043) are used to guide the material column into the cutting component (3).

4. The granulation device for rapid cooling and molding according to claim 3, characterized in that: The water-cooled assembly (4) includes a cooling pipe (401) which is wound around the outer surface of the forming pipe (203) and is connected to the covering cavity (2042), which is connected to the spraying fixture (5).

5. The granulation apparatus for rapid cooling and molding according to claim 4, characterized in that: The receiving ring (605) includes a base ring (6051), which includes multiple receiving groups. Each receiving group includes a transition area (6052). Starting from the transition area (6052), along the rotation direction of the main drive protrusion (602), there are sequentially a spray area (6053) and a receiving area (6054). The transition area (6052) and the spray area (6053) and the spray area (6053) and the receiving area (6054) are all connected by an arc surface. The transition area (6052) of two adjacent receiving groups is connected to the receiving area (6054).

6. A method for granulating polyamide resin based on the granulation apparatus of claim 5, characterized in that: The mixture including polyamide resin is placed into the extruder (1), and melted by the extruder (1) to form a molten material. The molten material is injected into the molding tube (203) and after being initially cooled by the cooling tube (401), it enters the coating chamber (2042). After being coated and cooled by the cooling water in the coating chamber (2042), the molten material is fully hardened. Finally, it enters the shearing chamber (304) and the shearing blade (303) shears the fully hardened molten material to form granules.

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