Plastic pelletizing equipment

Abstract

The utility model discloses plastic pelletizing equipment, which comprises a pelletizing die, which is provided with a main flow channel and a plurality of secondary flow channels, the secondary flow channels are communicated with the main flow channel, the secondary flow channels are connected with a material pipe, the material pipe is provided with a piston port in the axis direction of the material pipe, the material pipe is provided with notches in the orthogonal direction of the axis of the material pipe, and any two notches have mutually staggered orientations; the cooling water tank is connected to the pelletizing mold; the two piston mechanisms comprise connecting parts and a plurality of piston rods, all the piston rods of one piston mechanism are connected to the corresponding connecting parts, all the piston rods and all the piston openings are arranged in a one-to-one correspondence mode, and the moving paths of the piston rods cover the corresponding notches; and the power source drives the two connecting parts to linearly reciprocate in opposite directions, and the two connecting parts respectively have different single strokes. The water ring granulator disclosed by the utility model can be improved on the basis of the existing water ring granulator, and is specially used for granulating high-flowability plastic, so as to overcome the existing technical obstacles.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, in particular to plastic pelletizing equipment. Background Art

[0002] The water ring pelletizer is a relatively widely used pelletizing device on extruders and is suitable for most plastic processing, such as materials like PVC, PE, and PPR. The existing water ring pelletizer consists of a centrifugal dehydrator, a cooling water tank, a pelletizing cart, a water ring cover, a conveying pipeline, a cutting knife assembly, and a pelletizing motor. The entire system is installed at the end of the extruder and is connected to the die head of the extruder, and the axis of the pelletizer coincides with the axis of the extruder. The water ring cover, cutting knife, pelletizing motor, circulating water pump, heat exchanger, and operation box are all installed on the pelletizing cart, and the pelletizing cart can move on the guide rail. During operation, the pelletizing cart is pushed forward to closely abut the water ring cover against the die head of the extruder. The material is extruded through the discharge hole of the die head, and then the cutting knife is driven by the pelletizing motor to rotate to cut the material into particles. The particles are cooled in the cooling water tank and fall to the conveying pipeline at the bottom of the water ring cover, and are transported to downstream equipment by the external centrifugal water pump through water pressure.

[0003] However, for PP plastics, due to the good fluidity of the PP melt, when the cutting knife is driven by the pelletizing motor for high-speed pelletizing, the insufficiently cooled PP melt is likely to adhere to the cutting knife and bond with the PP melt at the next station, thus fusing into large-sized particles, which does not meet the shipping requirements of plastic particles.

[0004] Therefore, the existing PP plastics are generally processed by a conventional slitting machine and shipped in the form of long strips. However, the long-strip particles will significantly reduce the volume-weight ratio during plastic packaging, so the loading capacity of PP plastic particles is less than that of other plastic particles, resulting in a consistently high transportation cost for PP plastic particles. Content of the Utility Model

[0005] The utility model aims to provide a plastic pelletizing equipment that can pelletize plastics with high fluidity.

[0006] The plastic pelletizing equipment according to the first aspect embodiment of the utility model includes:

[0007] A pelletizing die, which is provided with a main runner and a plurality of sub-runners. All the sub-runners communicate with the main runner. Each sub-runner is connected with a material pipe extending outward. Each material pipe is provided with a piston port in its own axial direction, and each material pipe is provided with a notch in the direction orthogonal to its own axis. The orientations of any two notches are mutually offset;

[0008] A cooling water tank, which is close to the material pipe and connected to the pelletizing die. The cooling water tank is provided with a water inlet pipe and a water outlet pipe;

[0009] A piston mechanism, the number of which is two. Both of the two piston mechanisms include a connecting portion and a plurality of piston rods. All the piston rods of one piston mechanism are connected to the corresponding connecting portion. All the piston rods and all the piston ports are respectively arranged in a one-to-one correspondence. The piston rods are sealingly connected to the corresponding material pipes, and the moving paths of the piston rods cover the corresponding cutouts.

[0010] A power source that drives the two connecting portions to perform linear reciprocating motions in opposite directions, so that the piston rods of the two piston mechanisms respectively have opposite moving directions. The two connecting portions respectively have different single strokes, and the single stroke of one of the connecting portions towards the direction close to the secondary flow channel is greater than the single stroke of the other connecting portion towards the direction away from the secondary flow channel.

[0011] The plastic pelletizing equipment according to the embodiment of the present invention has at least the following beneficial effects: The main flow channel of the pelletizing die is docked with the extrusion die head of the extruder, so that the extruder can convey the plastic molten fluid to the pelletizing die. During pelletizing, the power source drives one group of piston rods to move towards the direction close to the secondary flow channel (hereinafter referred to as the forward direction), and the power source drives the other group of piston rods to move towards the direction away from the secondary flow channel (hereinafter referred to as the backward direction). Moreover, the single stroke of one group of piston rods in the forward direction is greater than the single stroke of the other group of piston rods in the backward direction, resulting in a positive pressure in the flow channel of the pelletizing die. The plastic molten fluid is extruded to flow out from the cutout of the material pipe in the backward state; Subsequently, the group of piston rods in the backward state retracts alone until it is completely reset. After that, the moving directions of the two groups of piston rods are interchanged. The piston rods will cut off the plastic molten fluid after passing through the cutout. At this time, the plastic molten fluid enters the cooling water body in the cooling water tank in a granular form. Since the orientations of any two cutouts are mutually misaligned, it is possible to avoid the adhesion of any two plastic particles in the short time after leaving the material pipe, thereby achieving the effect of distinct particles. The cooled plastic particles are gathered towards the water outlet direction under the drive of the water flow; The present invention can be modified on the basis of the existing water-ring pelletizing machine and is specifically used for pelletizing high-fluidity plastics to overcome the existing technical obstacles.

[0012] According to some embodiments of the present invention, the piston rods of one piston mechanism are first piston rods, and the piston rods of the other piston mechanism are second piston rods. The second piston rods are arranged beside any one of the first piston rods to balance the pressures at various positions.

[0013] According to some embodiments of the present invention, the two connecting portions are arranged at intervals in a straight line direction. The connecting portion close to the material pipe is provided with an avoidance space for avoiding other piston rods to save space.

[0014] According to some embodiments of the present utility model, specifically, the power source includes two driving devices, and the two driving devices are respectively connected to the two connection parts in one-to-one correspondence.

[0015] According to some embodiments of the present utility model, in order to facilitate the processing of the plastic molten fluid into granules, the size of the incision on the outer wall of the material pipe is larger than the size of the incision on the inner wall of the material pipe.

[0016] According to some embodiments of the present utility model, the vertical wall of the incision is an incomplete spherical surface, so that the processed plastic particles have an arc surface, so as to improve the volume weight ratio of the plastic particles during packaging.

[0017] According to some embodiments of the present utility model, for the convenience of cleaning, the granulation die is detachably connected to the cooling water tank.

[0018] According to some embodiments of the present utility model, since the granulation die and the cooling water tank are detachable, when the two are assembled, in order to facilitate the one-to-one docking of all the piston rods and all the piston ports, a guide rail is further included, and both the cooling water tank and the granulation die are slidably connected to the guide rail.

[0019] According to some embodiments of the present utility model, specifically, the granulation die includes a docking template and a granulation template connected to each other. The main runner is arranged on the docking template, the secondary runner is arranged on the granulation template, the granulation template is connected to the cooling water tank, and the docking template is connected to an external extrusion die head.

[0020] According to some embodiments of the present utility model, the granulation template is connected with a drainage cone extending to the main runner, and the size of the drainage cone gradually increases from the direction of the docking template to the direction of the granulation template. The setting of the drainage cone is to facilitate the drainage of the plastic molten fluid to each secondary runner.

[0021] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a three-dimensional structural schematic diagram of the plastic granulation equipment provided by the embodiment of the present utility model;

[0024] Figure 2 is Figure 1 the top view of the plastic granulation equipment shown;

[0025] Figure 3 is Figure 2 The sectional view of the plastic pelletizing equipment shown along the A-A sectional line;

[0026] Figure 4 is the three-dimensional exploded view of the plastic pelletizing equipment provided by an embodiment of the present invention;

[0027] Figure 5 is the three-dimensional structural schematic diagram of the material pipe provided by an embodiment of the present invention.

[0028] In the drawings: 100 - pelletizing die, 200 - cooling water tank, 110 - docking template, 120 - pelletizing template, 111 - main runner, 121 - secondary runner, 130 - drainage cone, 122 - groove, 500 - material pipe, 510 - piston port, 520 - incision, 201 - water storage cavity, 210 - water inlet pipe, 220 - water outlet pipe, 300 - first piston mechanism, 400 - second piston mechanism, 310 - first connection part, 320 - first piston rod, 410 - second connection part, 420 - second piston rod, 311 - clearance position. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0033] As Figures 1 to 3 shown, the plastic pelletizing equipment according to the first aspect embodiment of the present utility model includes a pelletizing die 100, a cooling water tank 200, a piston mechanism and a circulating water pump (not shown in the drawings). The pelletizing die 100 includes a docking template 110 and a pelletizing template 120. The docking template 110 and the pelletizing template 120 are connected by a threaded connector. The docking template 110 is provided with a main runner 111, and the pelletizing template 120 is provided with a plurality of secondary runners 121 communicating with the main runner 111. The pelletizing die 100 is connected to an external extruder die head through the docking template 110, and the pelletizing die 100 is connected to the cooling water tank 200 through the pelletizing template 120. The plastic molten fluid in the extruder die head is unidirectionally pushed to the main runner 111 of the docking template 110 by the feeding screw, and then the plastic molten fluid in the main runner 111 is diverted to each secondary runner 121 and finally enters the cooling water body in the cooling water tank 200 for cooling and hardening.

[0034] In order to facilitate the diversion of the plastic molten fluid in the main runner 111 to each secondary runner 121, the pelletizing template 120 is connected with a diversion cone 130 extending into the main runner 111. The diversion cone 130 can be selected as a cone. The size of the diversion cone 130 gradually increases from the docking template 110 to the pelletizing template 120 direction, and the pelletizing template 120 is provided with a trough 122 beside the diversion cone 130. All the secondary runners 121 are arranged at the low position of the trough 122. During operation, the plastic molten fluid in the main runner 111 is diverted along the inclined surface of the diversion cone 130 after contacting the diversion cone 130. After the plastic molten fluid enters the trough 122, it is then diverted to each secondary runner 121. Since each secondary runner 121 communicates with the trough 122, the flow rate of each secondary runner 121 remains consistent.

[0035] Further, in order to achieve standardized production, all the secondary runners 121 are circumferentially evenly distributed around the axis of the diversion cone 130, so that all the secondary runners 121 maintain the same working conditions. The above setting also facilitates the machining of the pelletizing template 120 using a machining device. The machining process of the machining device for the pelletizing template 120 is as follows: First, the pelletizing template 120 is fixed on the rotating chuck of the machining device. After the rotating chuck positions and fixes the pelletizing template 120, the drill bit processes the first secondary runner 121 on the pelletizing template 120. Then the drill bit resets, and the rotating chuck drives the pelletizing template 120 to rotate at a specific angle, and the drill bit is used again to process the second secondary runner 121, and so on, until all the secondary runners 121 are finally processed.

[0036] In addition, the pelletizing template 120 is connected to a material pipe 500 extending outward at the end of each secondary flow channel 121. The material pipe 500 may be a round pipe. The structure of the material pipe 500 is as follows: Figure 5 As shown, one end thereof is connected to the secondary flow channel 121, and the other end thereof is provided with a piston port 510 in the direction of its own axis. The material tube 500 is provided with a cutout 520 in the direction orthogonal to its own axis, and the cutout 520 is located in the middle of the material tube 500. It should be noted that the cutouts 520 of any two material tubes 500 have mutually staggered directions to ensure that the extension lines of any two cutouts 520 do not intersect. In this embodiment, all the material tubes 500 form a circular ring area together, and each cutout 520 is oriented outward along the diameter direction of the circular ring area.

[0037] Furthermore, the cutout 520 has a special shape, and the size of the cutout 520 on the outer wall of the material pipe 500 is larger than the size of the cutout 520 on the inner wall of the material pipe 500. That is, the size of the cutout 520 gradually increases from the inside of the material pipe 500 to the outside of the material pipe 500, so that when the plastic molten fluid flows out from the cutout 520, it can form granules rather than strips.

[0038] Furthermore, since the material tube 500 has a certain thickness, the incision 520 has a vertical wall of corresponding thickness. At this time, the vertical wall of the incision 520 is an incomplete spherical surface, which is a three-dimensional figure obtained by cutting the spherical surface through two parallel lines. The processed plastic particles have a curved surface, so as to improve the volume-to-weight ratio of the plastic particles during packaging and effectively reduce transportation costs.

[0039] like Figures 1 to 3 As shown, the cooling water tank 200 has a water storage chamber 201, all the material pipes 500 extend into the water storage chamber 201, the side wall of the cooling water tank 200 is provided with an inlet pipe 210 and an outlet pipe 220 arranged opposite to each other, and the circulating water pump is connected to the inlet pipe 210 and the outlet pipe 220 through pipelines, respectively, so as to realize the recycling of the water in the cooling water tank 200. Since the present invention does not improve the waterway of the plastic pelletizing equipment, the waterway structure of the plastic pelletizing equipment can use the existing technology, so the detailed description of the waterway structure is omitted in this article.

[0040] like Figure 3 and Figure 4As shown in the figure, the number of piston mechanisms is two, namely the first piston mechanism 300 and the second piston mechanism 400. The first piston mechanism 300 includes a first driving device (not shown in the attached drawings), a first connecting portion 310, and a plurality of first piston rods 320. All the first piston rods 320 are connected to the first connecting portion 310. The first driving device is installed outside the cooling water tank 200 and drives the first connecting portion 310 to perform linear reciprocating motion, thereby driving all the first piston rods 320 to perform linear reciprocating motion. At the same time, the second piston mechanism 400 includes a second driving device (not shown in the attached drawings), a second connecting portion 410, and a plurality of second piston rods 420. All the second piston rods 420 are connected to the second connecting portion 410. The second driving device is installed outside the cooling water tank 200 and drives the second connecting portion 410 to perform linear reciprocating motion, thereby driving all the second piston rods 420 to perform linear reciprocating motion. Since the piston rods block the piston port 510 of the material pipe 500, the plastic molten fluid in the material pipe 500 can only flow out from the cut 520.

[0041] In this embodiment, the first driving device and the second driving device can both be selected from devices such as cylinders, crank-slider devices, electric push rods, or gear-rack devices, etc. As long as they can achieve the linear reciprocating motion of the piston rods, regardless of the structure of the first driving device and the second driving device, they all fall within the protection scope of the present utility model.

[0042] Since the first connecting portion 310 and the second connecting portion 410 are respectively driven by the first driving device and the second driving device, the first connecting portion 310 and the second connecting portion 410 can have different moving directions. In this embodiment, the first driving device and the second driving device respectively drive the first connecting portion 310 and the second connecting portion 410 to perform linear reciprocating motion in opposite directions, so that the first piston rod 320 and the second piston rod 420 have opposite moving directions.

[0043] Moreover, the first connecting portion 310 and the second connecting portion 410 have different single strokes respectively. When the first connecting portion 310 moves towards the secondary flow channel 121, the second connecting portion 410 moves away from the secondary flow channel 121. At this time, the single stroke of the first connecting portion 310 is greater than that of the second connecting portion 410. If the first connecting portion 310 moves forward by 10 mm, then the second connecting portion 410 will only move backward by 8 mm, and there is a stroke difference of 2 mm between them; similarly, when the second connecting portion 410 moves towards the secondary flow channel 121, the first connecting portion 310 moves away from the secondary flow channel 121. At this time, the single stroke of the second connecting portion 410 is greater than that of the first connecting portion 310. If the second connecting portion 410 moves forward by 10 mm, then the first connecting portion 310 will only move backward by 8 mm, and there is a stroke difference of 2 mm between them.

[0044] With the above structure, during pelletizing, the first driving device drives all the first piston rods 320 to move towards the secondary flow channel 121 (hereinafter referred to as the forward direction), and the second driving device drives all the second piston rods 420 to move away from the secondary flow channel 121 (hereinafter referred to as the backward direction). At this time, the single stroke of the first piston rod 320 in the forward direction is greater than the single stroke of the second piston rod 420 in the backward direction. Since all the secondary flow channels 121 are interconnected, the flow channels of the pelletizing die 100 are under positive pressure due to the stroke difference, and the plastic molten fluid is extruded to flow out from the incision 520 of the material pipe 500 in the retracted state. Subsequently, the retracted second piston rod 420 retracts alone until it is fully reset. After that, the driving directions of the first driving device and the second driving device are interchanged, causing the moving directions of the first piston rod 320 and the second piston rod 420 to be interchanged. After passing through the incision 520, the second piston rod 420 will cut off the plastic molten fluid. At this time, the plastic molten fluid enters the cooling water in the cooling water tank 200 in the form of particles. Since the orientations of any two incisions 520 are misaligned with each other, it is possible to avoid the adhesion of any two plastic particles in the short time after leaving the material pipe 500, thereby achieving the effect of distinct particles. The cooled plastic particles are gathered towards the water outlet pipe 220 under the drive of the water flow.

[0045] In summary, whenever any group of piston rods is in the forward state, the other group of piston rods is in the backward state. Since the piston rod opens the cutout 520 of the material pipe 500 when retreating, the molten plastic fluid will flow out from the cutout 520 under the action of positive pressure. In the next action, the group of piston rods that was originally in the backward state is switched to the forward state, and the other group of piston rods that was originally in the forward state is switched to the backward state. Since the piston rod passes through the cutout 520 of the material pipe 500 when advancing, the piston rod will cut off the molten plastic fluid after passing through the cutout 520, causing the molten plastic fluid to enter the cooling water body in the cooling water tank 200 in the form of particles. The above actions are circulated until the plastic pelletizing equipment stops working. The utility model can be modified on the basis of the existing water ring pelletizer, and is specifically used for pelletizing high-fluidity plastics to overcome the existing technical obstacles.

[0046] Exemplarily, in addition to being driven by their own driving devices, the first connecting part 310 and the second connecting part 410 can also be driven together by a power source (not shown in the drawings). When the power source is equipped with corresponding transmission parts, it can achieve a single-power double-acting linkage structure, which is not limited to the above embodiments.

[0047] It should be noted that after the plastic particles leave the cooling water tank 200 driven by the water flow, a collection box (not shown in the drawings) is provided at the downstream position of the water flow, and a filter is provided in the collection box to intercept the plastic particles. After stopping the work, the collection box is taken out, and the plastic particles in the collection box are spread on the dryer for drying to obtain dry plastic particles.

[0048] like Figure 4 As shown, in some embodiments of the present invention, since all the material pipes 500 are evenly distributed around the center of the pelletizing template 120, all the piston rods are also evenly distributed around the center of the pelletizing template 120. In order to balance the pressure at each position, a second piston rod 420 is provided next to any first piston rod 320, that is, all the first piston rods 320 and all the second piston rods 420 are arranged in the form of plum blossoms and bamboos, so as to disperse the positive pressure in the flow channel to various places to improve the discharge effect of the plastic molten fluid.

[0049] In some embodiments of the present invention, in order to save space, the first connection part 310 and the second connection part 410 are arranged at intervals along the straight line direction, and the first connection part 310 and the second connection part 410 have a nested part to centrally configure the positions of the first drive device and the second drive device. In addition, since all the first piston rods 320 and all the second piston rods 420 are arranged in the form of bamboos and plum blossoms, the connection part close to the material pipe 500 is provided with a clearance position 311 for avoiding other piston rods.

[0050] In some embodiments of the present utility model, after shutdown or before changing the plastic material to be cut, it is necessary to clean the cooling water tank 200 and the granulation die 100 to avoid cross-contamination between different plastic materials. For the convenience of cleaning, the granulation die 100 is detachably connected to the cooling water tank 200, and the two are connected by a metal buckle (not shown in the attached drawings). When it is necessary to connect the granulation die 100 and the cooling water tank 200, first dock the granulation template 120 of the granulation die 100 with the cooling water tank 200, and then lock multiple metal buckles between the two; when it is necessary to separate the granulation die 100 and the cooling water tank 200, first unlock all the metal buckles, and then separate the cooling water tank 200 and the granulation template 120.

[0051] Furthermore, in order to better adjust the positions of the cooling water tank 200 and the granulation die 100, guide rails (not shown in the attached drawings) are provided below the two. The granulation template 120 of the granulation die 100 and the cooling water tank 200 are both connected with sliders (not shown in the attached drawings) that are slidably connected to the guide rails, and only the degrees of freedom of the cooling water tank 200 and the granulation die 100 in the length direction of the guide rails are retained. When the cooling water tank 200 and the granulation die 100 are assembled, since only the degrees of freedom of the two in the length direction of the guide rails are retained, all the piston rods and all the piston ports 510 can satisfy the one-to-one docking relationship, so as to eliminate the centering operation of the piston rods and the piston ports 510.

[0052] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model.

Claims

1. Plastic pelletizing equipment, characterized in that: include: A pelletizing die (100) is provided with a main flow channel (111) and a plurality of secondary flow channels (121), all of the secondary flow channels (121) are connected to the main flow channel (111), each of the secondary flow channels (121) is connected to a material pipe (500) extending outward, each of the material pipes (500) is provided with a piston port (510) in the direction of its own axis, each of the material pipes (500) is provided with a notch (520) in a direction orthogonal to its own axis, and any two of the notches (520) have mutually staggered orientations; A cooling water tank (200), which is close to the material pipe (500) and connected to the pelletizing die (100), and the cooling water tank (200) is provided with a water inlet pipe (210) and a water outlet pipe (220); There are two piston mechanisms, each of which comprises a connecting portion and a plurality of piston rods, all piston rods of one piston mechanism are connected to the corresponding connecting portion, all piston rods are arranged in one-to-one correspondence with all piston ports (510), the piston rods are sealingly connected to the corresponding material pipe (500), and the moving path of the piston rods covers the corresponding incision (520); A power source drives the two connecting parts to perform linear reciprocating motion in opposite directions, so that the piston rods of the two piston mechanisms have opposite moving directions, and the two connecting parts have different single strokes, wherein the single stroke of one connecting part in a direction approaching the secondary flow channel (121) is greater than the single stroke of the other connecting part in a direction away from the secondary flow channel (121).

2. The plastic pelletizing equipment according to claim 1, characterized in that: The piston rod of one of the piston mechanisms is a first piston rod (320), and the piston rod of the other piston mechanism is a second piston rod (420). The second piston rod (420) is provided on the side of any one of the first piston rods (320).

3. The plastic pelletizing equipment according to claim 2, characterized in that: The two connecting parts are arranged at intervals along a straight line direction, and the connecting part close to the material pipe (500) is provided with an escape position (311) for avoiding other piston rods.

4. The plastic pelletizing equipment according to claim 1, characterized in that: The power source comprises two driving devices, and the two driving devices are connected to the two connecting parts in a one-to-one correspondence.

5. The plastic pelletizing equipment according to claim 1, characterized in that: The size of the cutout (520) on the outer wall of the material pipe (500) is greater than the size of the cutout (520) on the inner wall of the material pipe (500).

6. The plastic pelletizing equipment according to claim 5, characterized in that: The vertical wall of the incision (520) is an incomplete spherical surface.

7. The plastic pelletizing equipment according to claim 1, characterized in that: The pelletizing die (100) is detachably connected to the cooling water tank (200).

8. The plastic pelletizing equipment according to claim 7, characterized in that: It also includes a guide rail, and the cooling water tank (200) and the pelletizing die (100) are both slidably connected to the guide rail.

9. The plastic pelletizing equipment according to claim 1, characterized in that: The pelletizing die (100) comprises a docking template (110) and a pelletizing template (120) which are connected to each other, the main flow channel (111) is arranged on the docking template (110), the secondary flow channel (121) is arranged on the pelletizing template (120), and the pelletizing template (120) is connected to the cooling water tank (200).

10. The plastic pelletizing equipment according to claim 9, characterized in that: The pelletizing template (120) is connected to a drainage cone (130) extending to the main channel (111), and the size of the drainage cone (130) gradually increases from the docking template (110) toward the pelletizing template (120).

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