Short-stroke plastic extrusion granulation device

Abstract

The utility model discloses a short-stroke plastic extrusion granulation device, an extrusion assembly comprises an extrusion cylinder, a pushing mechanism and a granulation template, the pushing mechanism is arranged in the extrusion cylinder, and the granulation template is connected to an outlet of the extrusion cylinder; the granulation assembly comprises a scraper, a first rack, a second rack, a sector gear and a granulation motor, the central angle of the sector gear is smaller than 180 degrees, the first rack and the second rack are arranged on the two opposite sides of the sector gear respectively, one end of the first rack and one end of the second rack are both connected to the scraper, and the scraper is arranged on the side, away from the extrusion cylinder, of the granulation template; the sector gear is connected to the granulation motor; the granulation motor is used for indirectly driving the scraper to pass through the extrusion surface of the granulation template to realize reciprocating motion. According to the utility model, the granulation motion period of the scraper can be effectively shortened, the overall extrusion granulation efficiency can be improved, the accuracy and consistency of each scraping action can be effectively improved, the granulation effect is good, and the extrusion holes can be effectively prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic granulation, in particular to a plastic extrusion granulation device with a short stroke. Background Art

[0002] In the plastic processing industry, extrusion granulation is one of the key links in the manufacture of plastic products. Traditional plastic extrusion granulation heats and stirs different materials through an extrusion structure. Through the mutual friction and shear of the materials, the kneading and extrusion of the materials can be achieved. Finally, the granulation of plastic masterbatch is realized by means of die-face hot cutting or strand cutting.

[0003] In the related art, a plastic extrusion granulation device often uses a template arranged at the outlet of an extruder and a rotary cutter to realize extrusion granulation. This rotary cutter takes the center of the template as the rotation axis, the rotation axis is connected to a motor, and the motor drives the cutter to move in a circular motion on the surface of the template through the rotation axis. The stroke required for the cutter to complete one cutting motion is long, the efficiency of extrusion granulation is low, and the granulation method of rotary cutting easily leads to uneven sizes of the obtained plastic masterbatch and poor granulation quality. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a plastic extrusion granulation device with a short stroke, which can perform scraping and granulation processing with equal speed in each area, has good granulation quality, a short movement stroke for single granulation, and high granulation efficiency.

[0005] According to an embodiment of the utility model, a plastic extrusion granulation device with a short stroke includes:

[0006] An extrusion assembly, including an extrusion barrel, a pushing mechanism and a granulation template. The pushing mechanism is arranged in the extrusion barrel and is used to push the materials in the extrusion barrel towards the outlet of the extrusion barrel. The granulation template is connected to the outlet of the extrusion barrel. The side of the granulation template away from the extrusion barrel is the extrusion surface, and the granulation template is provided with a plurality of extrusion holes;

[0007] A granulation assembly, including a scraper, a first rack, a second rack, a sector gear and a granulation motor. The central angle of the sector gear is less than 180 degrees. The first rack and the second rack are respectively arranged on opposite sides of the sector gear, so that the sector gear meshes with the first rack or the second rack. The first rack and the second rack are parallel. One ends of the first rack and the second rack are both connected to the scraper. The scraper is arranged on the side of the granulation template away from the extrusion barrel. The movement path of the scraper is parallel to the granulation template. The sector gear is connected to the granulation motor, and the granulation motor is used to indirectly drive the scraper to reciprocate through the extrusion surface of the granulation template.

[0008] In this embodiment, the central angle of the sector gear is α, and 90° ≤ α ≤ 160°.

[0009] In this embodiment, a cooling channel is provided in the granulation template, and the internal space of the cooling channel is independent of the internal space of the extrusion holes.

[0010] In this embodiment, the short-stroke plastic extrusion granulation device further includes two demolding liquid wetting members, which are respectively located at the starting point and the ending point of the movement path of the scraper. The demolding liquid wetting members are used to transfer the demolding liquid to the surface of the scraper.

[0011] In this embodiment, both the first rack and the second rack are parallel to the horizontal plane.

[0012] In this embodiment, two scraping blade edges are provided on one side of the scraper close to the granulation template, and the two scraping blade edges respectively face opposite ends of the movement path of the scraper.

[0013] In this embodiment, the short-stroke plastic extrusion granulation device further includes a cooling aggregate box, which is located below the granulation template.

[0014] In this embodiment, a conveyor belt is provided in the cooling aggregate box, and the conveyor belt is provided with water leakage holes.

[0015] In this embodiment, the pushing mechanism includes an extrusion motor and an extrusion screw arranged in the extrusion barrel, and the extrusion screw is connected to the extrusion motor.

[0016] The embodiment of the present utility model has at least the following beneficial effects:

[0017] By setting the central angle of the sector gear to be less than 180 degrees, and cooperating with the first rack and the second rack on both sides to drive the scraper to achieve reciprocating motion at different time periods, the scraper completes one granulation process when it moves along the diameter of the granulation template once. It can enable the scraper to complete one granulation process within an extremely short stroke, effectively shorten the granulation movement cycle of the scraper, improve the overall extrusion granulation efficiency. In addition, the scraping speed of the scraper for each extrusion hole is consistent, which can effectively improve the accuracy and consistency of each scraping action of the scraper, effectively improve the uniformity and precision of the granulation process, and the granulation effect is good. Moreover, the consistency of the movement states of each position of the scraper is strong, and the movement speed and scraping frequency of the scraper can be directly adjusted by adjusting the granulation motor, with strong controllability, and it can adapt to the granulation processing requirements of materials with different viscosities; in addition, the scraper realizes scraping granulation on the extrusion surface of the granulation template through reciprocating motion, which can timely clean the material residues generated on the surface of the granulation template during single-way scraping, effectively avoid blockage of the extrusion holes, effectively ensure the extrusion granulation effect, effectively save the line stop cleaning time, and further effectively improve the extrusion granulation efficiency. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0019] Figure 1 is a schematic perspective view of a short-stroke plastic extrusion granulation device according to an embodiment of the present utility model;

[0020] Figure 2 is a schematic perspective view of the short-stroke plastic extrusion granulation device according to an embodiment of the present utility model in another working state;

[0021] Figure 3 is a schematic perspective view of the short-stroke plastic extrusion granulation device according to an embodiment of the present utility model from another perspective;

[0022] Figure 4 is a schematic top view of the short-stroke plastic extrusion granulation device according to an embodiment of the present utility model;

[0023] Figure 5 is the Figure 4 schematic cross-sectional view taken along A-A' in

[0024] Figure 6 is a schematic perspective view of the granulation template of the short-stroke plastic extrusion granulation device according to an embodiment of the present utility model;

[0025] Figure 7 is a schematic perspective view of the short-stroke plastic extrusion granulation device during application according to an embodiment of the present utility model.

[0026] Reference numerals:

[0027] Extrusion assembly 100, extrusion barrel 110, pushing mechanism 120, extrusion motor 121, extrusion screw 122, granulation template 130, extrusion holes 131, cooling channels 132;

[0028] Granulation assembly 200, scraper 210, scraping cutting edge part 211, first rack 220, second rack 230, sector gear 240, granulation motor 250, guiding and positioning structure 260;

[0029] Demoulding liquid wetting part 300;

[0030] Cooling and collecting box 400, conveyor belt 410, water leakage holes 411. Detailed implementation manners

[0031] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, left, right, front, back, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 utility model.

[0033] In the description of the present utility model, if the first and the second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0034] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the technical field can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0035] In the plastic processing industry, extrusion granulation is one of the key links in the manufacture of plastic products. Traditional plastic extrusion granulation heats and stirs different materials through an extrusion structure. Through the mutual friction and shearing between the materials, the kneading and extrusion of the materials can be achieved. Finally, the granulation of plastic masterbatch is realized by means of die face hot cutting or strand cutting.

[0036] In the traditional technology, plastic extrusion granulation devices often use a template set at the outlet of the extruder and cooperate with a rotary cutter to achieve extrusion granulation. This rotary cutter rotates around the center of the template, and the rotating shaft is connected to a motor. The motor drives the cutter to move in a circular motion on the surface of the template through the rotating shaft. The stroke required for the cutter to complete one cutting motion is long, the efficiency of extrusion granulation is low, and the granulation method of rotary cutting easily leads to uneven sizes of the plastic masterbatch obtained by cutting, and the granulation quality is poor. Moreover, this unidirectional rotary cutting method in the related technology also easily causes problems such as blockage of the template holes. Once blockage occurs and line shutdown maintenance is required, it will seriously affect production efficiency and product quality, especially when producing and preparing plastic materials with high viscosity or containing impurities, the above problems are particularly prominent.

[0037] With the continuous development of plastic processing technology, the market's demand for extrusion granulation equipment with short stroke, high efficiency, and low energy consumption is increasing day by day. Although the existing technologies have improved the degree of production automation to a certain extent, there is still room for improvement in dealing with complex materials, optimizing particle shape, and reducing energy consumption. Therefore, it is particularly important to develop a short-stroke plastic extrusion granulation device that can flexibly adjust the movement path of the scraper, reduce die blockage, and improve granulation quality.

[0038] The following refers to the attached Figure 1 to the attached Figure 7 to describe the short-stroke plastic extrusion granulation device of the embodiment of the present invention, which can perform scraping granulation processing with equal speed in each area, has good granulation quality, a short movement stroke for single granulation, and high granulation efficiency.

[0039] In Figures 1 to 7 order to ensure that the content of the attached drawings is clearer, the external support part for installing the structures of each component in the short-stroke plastic extrusion granulation device is hidden and not shown.

[0040] Referring to Figures 1 to 7 , a short-stroke plastic extrusion granulation device of the embodiment of the present invention includes:

[0041] An extrusion assembly 100, including an extrusion barrel 110, a pushing mechanism 120, and a granulation die 130. The pushing mechanism 120 is arranged inside the extrusion barrel 110. The extrusion barrel 110 is connected to an external support. The pushing mechanism 120 is used to push the material in the extrusion barrel 110 towards the outlet of the extrusion barrel 110. The granulation die 130 is connected to the outlet of the extrusion barrel 110 to close the outlet of the granulation die 130. The extrusion barrel 110 is located on one side of the granulation die 130. The side of the granulation die 130 away from the extrusion barrel 110 is the extrusion surface. The granulation die 130 is provided with a number of extrusion holes 131, and the extrusion holes 131 are used to shape the material extruded from the extrusion barrel 110.

[0042] The granulation assembly 200 includes a scraper 210, a first rack 220, a second rack 230, a sector gear 240, and a granulation motor 250. The first rack 220, the second rack 230, the sector gear 240, and the granulation motor 250 are all located outside the extrusion path of the extrusion assembly 100, which can effectively improve the space utilization rate of the granulation template 130. The central angle of the sector gear 240 is less than 180 degrees. The first rack 220 and the second rack 230 are respectively arranged on opposite sides of the sector gear 240, so that the sector gear 240 meshes with the first rack 220 or the second rack 230. The sector gear 240 meshes with the first rack 220 and the second rack 230 at different times respectively. The first rack 220 is parallel to the second rack 230, and the tooth patterns of the first rack 220 and the second rack 230 are arranged oppositely. One end of the first rack 220 and one end of the second rack 230 are both connected to the scraper 210. The scraper 210 is arranged on the side of the granulation template 130 away from the extrusion barrel 110. The scraping blade of the scraper 210 is located in the plane of the extrusion surface of the granulation template 130. The movement path of the scraper 210 is parallel to the granulation template 130. The first rack 220 and the second rack 230 are parallel to the granulation template 130. The starting point and the ending point of the movement path of the scraper 210 are respectively located outside the opposite sides of the granulation template 130. The sector gear 240 is coaxially connected to the output shaft of the granulation motor 250. The granulation motor 250 is used to indirectly drive the scraper 210 to reciprocate through the extrusion surface of the granulation template 130, thereby realizing scraping granulation. Specifically, the granulation motor 250 is used to drive the scraper 210 to reciprocate along a linear trajectory through the sector gear 240, the first rack 220, and the second rack 230. The granulation motor 250 is connected to an external bracket.

[0043] The working process is as follows: The pushing mechanism 120 pushes the material in the extrusion barrel 110 towards the granulation template 130, so that the material in the extrusion barrel 110 is extruded after being shaped through the extrusion holes 131. The granulation motor 250 drives the sector gear 240 to rotate. As shown in Figure 1 , the sector gear 240 meshes with the first rack 220, thereby driving the first rack 220 to move in the first direction. The scraper 210 follows the first rack 220 and scrapes the extrusion surface of the granulation template 130 in the first direction, thereby scraping and granulating the extruded material. After the sector gear 240 rotates to a certain angle and disengages from the first rack 220, as shown in Figure 2 , the sector gear 240 meshes with the second rack 230, thereby driving the second rack 230 to move in the second direction. The second direction is parallel and opposite to the first direction. The scraper 210 follows the second rack 230 and scrapes the extrusion surface of the granulation template 130 in the second direction, thereby scraping and granulating the extruded material. Through the reciprocating movement of the scraper 210 on the surface of the granulation template 130, a coherent and efficient granulation action can be achieved.

[0044] By setting the central angle of the sector gear 240 to be less than 180 degrees and cooperating with the first rack 220 and the second rack 230 on both sides to drive the scraper 210 to achieve reciprocating motion at different time intervals, the scraper 210 completes one granulation process when it moves once along the diameter of the granulation template 130. Compared with the traditional technology where the scraper 210 rotating around the center needs to move along the circumference of the template, this plastic extrusion granulation device can enable the scraper 210 to complete one granulation process within a very short stroke, effectively shortening the granulation motion cycle of the scraper 210, improving the overall extrusion granulation efficiency. In addition, compared with the defect in the traditional technology that the linear velocities of the materials at each hole position of the scraper 210 rotating around the center are different, this plastic extrusion granulation device can ensure that the scraping speed of the scraper 210 for each extrusion hole 131 is consistent, effectively improving the accuracy and consistency of each scraping action of the scraper 210, effectively improving the uniformity and precision of the granulation process, with good granulation effect. Moreover, due to the strong consistency of the motion states of each position of the scraper 210, the motion speed and scraping frequency of the scraper 210 can be directly adjusted by adjusting the granulation motor 250, with strong controllability, and it can adapt to the granulation processing requirements of materials with different viscosities; in addition, the scraper 210 realizes scraping granulation on the extrusion surface of the granulation template 130 through reciprocating motion, can timely clean the material residues generated on the surface of the granulation template 130 during single-directional scraping, effectively avoid the blockage of the extrusion holes 131, effectively ensure the extrusion granulation effect, effectively save the line-stop cleaning time, and further improve the extrusion granulation efficiency. Furthermore, this plastic extrusion granulation device can make full use of the space at each position of the granulation template 130 by setting the granulation motor 250 and other structures outside the extrusion path of the extrusion assembly 100. Compared with the defect in the traditional technology that the driving structure is set at the center position of the template, which requires reducing the number of holes, this utility model can effectively utilize the space in the central area of the granulation template 130, thereby further improving the processing efficiency of extrusion granulation. It can be understood that the circumferential surface of the sector gear 240 is provided with tooth parts distributed in a sector shape, the central angle of the sector corresponding to the tooth parts is less than 180 degrees, and the tooth parts include several evenly distributed teeth.

[0045] It can be understood that the central angle of the sector gear 240 is α, 90°≤α≤160°. By setting the central angle α of the sector gear 240 to meet the range of [90°, 160°], the tooth pattern setting of the first rack 220 and the second rack 230 can be effectively simplified while improving the space utilization rate. The design difficulty of setting the sector gear 240 to be kneaded and connected with the first rack 220 and the second rack 230 respectively is low, which can effectively reduce the design and manufacturing difficulty of the plastic extrusion granulation device. Specifically, α=120°. By setting the central angle of the sector gear 240 to α of 120 degrees, the tooth pattern of the first rack 220 and the tooth pattern of the second rack 230 can be set to a simple design of full-line layout, and at the same time, the structure of the sector gear 240 can be fully utilized, and the size of the sector gear 240 can be effectively controlled, thereby effectively controlling the size of the plastic extrusion granulation device.

[0046] It can be understood that a cooling channel 132 is provided in the granulation template 130, and the internal space of the cooling channel 132 is independent of the internal space of the extrusion hole 131. The cooling channel 132 and each extrusion hole 131 are staggered, that is, along the direction perpendicular to the granulation template 130, there is no overlapping area between the projections of the cooling channel 132 and the extrusion hole 131 on the extrusion surface, and the internal space of the cooling channel 132 is isolated from the internal space of the extrusion hole 131, which can effectively ensure that the cooling channel 132 and the extrusion hole 131 can work independently.

[0047] The outlet and inlet of the cooling channel 132 both pass through the side of the granulation template 130 to connect to the external liquid supply structure and recovery structure. Supplying cooling liquid, such as cold water, into the cooling channel 132 can effectively reduce the temperature of the granulation template 130, thereby improving the cooling and molding effect of the granulation template 130 on the material passing through. In conjunction with the short-stroke scraper 210, the overall extrusion granulation efficiency can be effectively improved.

[0048] It can be understood that the short-stroke plastic extrusion granulation device also includes two demolding liquid impregnation parts 300, which are respectively located at the starting point and the end point of the movement path of the scraper 210. The two demolding liquid impregnation parts 300 are connected to the external bracket. The demolding liquid impregnation parts 300 are used to transfer the demolding liquid to the surface of the scraper 210. The demolding liquid, also known as a release agent, is an interface coating used on the surfaces of two objects that are easy to adhere to each other. It can make the surfaces of the objects easy to detach, smooth and clean.

[0049] By transferring the demoulding liquid to the surface of the scraper 210 through the demoulding liquid impregnation member 300, the scraping and granulation performance of the scraper 210 can be effectively improved, the material can be effectively prevented from adhering to the surface of the scraper 210, and the extrusion granulation effect can be effectively improved. Specifically, the demoulding liquid impregnation member 300 is a sponge, and the demoulding liquid is provided to the demoulding liquid impregnation member 300 by manual or material storage dripping.

[0050] It can be understood that both the first rack 220 and the second rack 230 are parallel to the horizontal plane, that is, the movement path of the scraper 210 is parallel to the horizontal plane, that is, the scraper 210 reciprocates parallel to the horizontal plane, which can effectively ensure that the plastic masterbatch obtained by extrusion granulation can fall smoothly under the action of gravity, effectively avoid the scraper 210 from obstructing the falling action of the plastic masterbatch, effectively improve the stability of the falling action of the wood material, and avoid the plastic masterbatch from colliding with the scraper 210 and splashing outside the blanking collection area, thus affecting the collection effect.

[0051] It can be understood that two scraping blade parts 211 are provided on one side of the scraper 210 close to the granulation template 130, and the two scraping blade parts 211 respectively face the opposite ends of the movement path of the scraper 210, that is, the two scraping blade parts 211 respectively face the first direction and the second direction. Through the scraping blade parts 211, the flatness of the incision of the plastic masterbatch obtained by scraping granulation can be effectively improved, the quality of extrusion granulation can be effectively improved, and the movement path of the scraping blade is arranged in the plane where the extrusion surface of the granulation template 130 is located.

[0052] It can be understood that the short-stroke plastic extrusion granulation device further includes a cooling and collecting tank 400. The cooling and collecting tank 400 is located below the granulation template 130. The cooling and collecting tank 400 is connected to an external support. The cooling and collecting tank 400 is filled with a cooling liquid, and the cooling liquid can be cold water. The material extruded from the extrusion holes 131 forms plastic masterbatch after being scraped and granulated by the scraper 210. The plastic masterbatch detaches from the granulation template 130 and falls into the cooling and collecting tank 400, where it can be quickly cooled and finally formed.

[0053] It can be understood that a conveyor belt 410 is provided in the cooling and collecting tank 400. The conveyor belt 410 is connected to a conveyor driving mechanism. The conveyor belt 410 is provided with water leakage holes 411. The water leakage holes 411 penetrate through the opposite two surfaces of the conveyor belt 410. The conveying plane of the conveyor belt 410 is inclined from bottom to top away from the extrusion assembly 100. The conveyor belt 410 is used to convey the plastic masterbatch that has fallen into the cooling and collecting tank 400 from bottom to top away from the extrusion assembly 100.

[0054] The conveyor driving mechanism drives the conveyor belt 410 to rotate and convey the plastic masterbatch. During the conveying process, the moisture on the surface of the plastic masterbatch can fall through the water leakage holes 411, so as to effectively reduce the moisture on the surface of the plastic masterbatch. The conveyor belt 410 conveys the plastic masterbatch to the next working station for drying and other operations.

[0055] Specifically, the conveyor driving mechanism can be set to include a driving conveyor motor and conveyor rollers. The conveyor belt 410 is wound around the conveyor rollers. The conveyor rollers are connected to the output end of the conveyor motor through a synchronous structure or directly. The conveyor motor is used to drive the conveyor belt to convey through the conveyor rollers to convey the plastic masterbatch.

[0056] It can be understood that the extrusion mechanism 120 includes an extrusion motor 121 and an extrusion screw 122 disposed within the extrusion barrel 110. The extrusion motor 121 is disposed outside the extrusion barrel 110. The extrusion screw 122 is connected to the extrusion motor 121. The extrusion motor 121 is used to drive the extrusion screw 122 to rotate, so that the extrusion screw 122 rotates to form a spiral driving force to extrude the material from the inside of the extrusion barrel 110 towards the granulation template 130. The extrusion motor 121 is connected to an external support.

[0057] It can be understood that, with reference to Figure 7 As shown, during application implementation, the granulation assembly 200 further includes a guiding and positioning structure 260. The first rack 220 is connected to the guiding and positioning structure 260. The guiding and positioning structure 260 is connected to the first rack 220 and an external support to achieve the stable operation of the scraper 210. Preferably, two guiding and positioning structures 260 can be provided. The second rack 230 is connected to another guiding and positioning structure 260. The positioning and guiding structure 260 can be configured to include a slider and a guide rail. The slider is slidably connected to the guide rail. The guide rail is connected to an external support. The slider is used to connect the first rack 220 or the second rack 230. The positioning and guiding structure 260 can also be configured to include a guide post and a guide sleeve structure in a sliding connection.

[0058] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A plastic extrusion granulation device with a short stroke, characterized in that, including: An extrusion assembly (100), comprising an extrusion barrel (110), a pushing mechanism (120) and a granulation template (130). The pushing mechanism (120) is arranged inside the extrusion barrel (110). The pushing mechanism (120) is used to push the material inside the extrusion barrel (110) towards the outlet of the extrusion barrel (110). The granulation template (130) is connected to the outlet of the extrusion barrel (110). The side of the granulation template (130) away from the extrusion barrel (110) is the extrusion surface. The granulation template (130) is provided with a plurality of extrusion holes (131); A granulation assembly (200), comprising a scraper (210), a first rack (220), a second rack (230), a sector gear (240) and a granulation motor (250). The central angle of the sector gear (240) is less than 180 degrees. The first rack (220) and the second rack (230) are respectively arranged on opposite sides of the sector gear (240), so that the sector gear (240) meshes with the first rack (220) or the second rack (230). The first rack (220) is parallel to the second rack (230). One ends of the first rack (220) and the second rack (230) are both connected to the scraper (210). The scraper (210) is arranged on the side of the granulation template (130) away from the extrusion barrel (110). The movement path of the scraper (210) is parallel to the granulation template (130). The sector gear (240) is connected to the granulation motor (250). The granulation motor (250) is used to indirectly drive the scraper (210) to reciprocate through the extrusion surface of the granulation template (130).

2. A short-stroke plastic extrusion granulation device according to claim 1, characterized in that, The central angle of the sector gear (240) is α, and 90° ≤ α ≤ 160°.

3. A short-stroke plastic extrusion granulation device according to claim 1, characterized in that, A cooling channel (132) is provided in the granulation template (130). The internal space of the cooling channel (132) is independent of the internal space of the extrusion holes (131).

4. A short-stroke plastic extrusion granulation device according to claim 1, characterized in that, It further includes two demoulding liquid wetting parts (300). The two demoulding liquid wetting parts (300) are respectively located at the starting point and the ending point of the movement path of the scraper (210). The demoulding liquid wetting parts (300) are used to transfer the demoulding liquid to the surface of the scraper (210).

5. A short-stroke plastic extrusion granulation device according to claim 1, characterized in that, The first rack (220) and the second rack (230) are both parallel to the horizontal plane.

6. A short-stroke plastic extrusion granulation device according to claim 1, characterized in that, Two scraping blade edges (211) are provided on the side of the scraper (210) close to the granulation template (130). The two scraping blade edges (211) respectively face opposite ends of the movement path of the scraper (210).

7. A short-stroke plastic extrusion granulation device according to claim 1, characterized in that It further includes a cooling aggregate box (400). The cooling aggregate box (400) is located below the granulation template (130).

8. A short-stroke plastic extrusion granulation device according to claim 7, characterized in that, A conveyor belt (410) is provided in the cooling aggregate box (400). The conveyor belt (410) is provided with water leakage holes (411).

9. A short-stroke plastic extrusion granulation device according to claim 1, characterized in that, The pushing mechanism (120) includes an extrusion motor (121) and an extrusion screw (122) disposed in the extrusion barrel (110), and the extrusion screw (122) is connected to the extrusion motor (121).

Images