Plastic granulator
By designing a power shaft, mounting sleeve and cleaning structure in the plastic pelletizer, the problem of plastic pellets or scraps adhering to the blade is solved, cutting accuracy and cleanliness are achieved, and the normal operation of the blade is ensured.
Patent Information
- Application Number
- CN202510941061.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-09
- Publication Date
- 2025-09-26
AI Technical Summary
When the plastic pelletizer is cutting plastic strips, plastic particles or scraps tend to adhere to the blade, affecting the normal cutting of the blade.
A plastic pelletizer is designed, including a power shaft, a mounting sleeve, a mounting rod and a cleaning structure. Through the cooperation of an elastic reset part and a protruding structure, the synchronous movement of the blade and the plastic material strip and the automatic cleaning of the cleaning structure are achieved, ensuring cutting accuracy and cleanliness.
The plastic particles are cut more neatly, and plastic particles or scraps adhering to the blade are avoided, ensuring the normal cutting and cleaning effect of the blade.
Smart Images
Figure CN120697208A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of plastic processing, and in particular relates to a plastic pelletizer. Background Art
[0002] In the production process of plastic products, plastic pellets are often used to facilitate processing and uniform speed. The production process of plastic pellets is generally that the screw extruder melts and extrudes the plastic material strips, cools and shapes the plastic material strips, the plastic pelletizer pelletizes, and the pellets are dehydrated and bagged. Therefore, the plastic pelletizer is a more important equipment in the production process.
[0003] When the plastic pelletizer is cutting plastic strips, the internal temperature of the plastic strips is still relatively high. When the blade cuts the area in the center of the plastic strips, the cut plastic particles are likely to adhere to the blade, or the scraps accumulate and adhere to the blade, affecting the normal cutting of the blade. Summary of the Invention
[0004] In view of this, the present invention discloses a plastic pelletizer, which aims to solve the problem that plastic particles or scraps adhere to the blade during the plastic pelletizing process, affecting the normal cutting of the blade.
[0005] In order to achieve the above object, the present invention provides the following technical solutions:
[0006] A plastic pelletizer includes a base and a support plate arranged on the base, wherein the support plate is provided with a plurality of circumferentially distributed feed holes, a concave cavity is provided at the center of the support plate, a power shaft is coaxially rotated in the concave cavity, a power device for driving the power shaft is provided in the concave cavity, a mounting sleeve is coaxially slidably connected to the power shaft, and an elastic reset part is provided between the mounting sleeve and the power shaft, a plurality of mounting rods perpendicular to the power shaft are fixed on the circumferential side of the mounting sleeve, and the number of the mounting rods corresponds to the number of feed holes, a blade that is detachably connected to the support plate is provided on the mounting rod, an annular cleaning structure is slidably provided on the blade, and the cleaning structure is used to clean the surface of the blade, and when the blade is in contact with the support plate, the cleaning structure is located in the concave cavity; a protruding structure for pushing the mounting rod away from the support plate is provided in the concave cavity.
[0007] In this solution, the plastic strips extruded by the screw machine are pulled into the plastic pelletizer through the feed hole, and the power shaft is driven to rotate by the power device, and then the blade is driven to cut the plastic strips through the mounting sleeve and the mounting rod; before the blade contacts the plastic strips, the mounting sleeve is attached to the support plate under the action of the elastic reset member; when the blade rotates to contact the plastic strips, cutting begins. During the cutting process, after the mounting rod contacts the protruding structure, the protruding structure pushes the mounting rod to move away from the support plate, thereby driving the blade to move synchronously with the plastic strips, so that the incision made by the blade on the strips remains downward, making the cut of the cut plastic particles more neat and the size of the plastic particles more accurate; in addition, when the blade is finished cutting, the distance between the blade and the support plate allows the cleaning structure to pass through, and at this time the cleaning structure is driven to clean the blade surface to prevent plastic particles or scraps from adhering to the blade and avoiding affecting the normal cutting of the blade; when the cleaning structure is cleaned and reset, the mounting rod is separated from the protruding structure, and the elastic reset member drives the blade to re-attach to the support plate through the mounting sleeve and other structures.
[0008] Furthermore, the raised structure includes an annular block that is coaxially rotatably arranged in the concave cavity, a driving structure for driving the annular block to rotate is provided in the concave cavity, an accommodating hole is provided on the end face of the annular block, a first telescopic rod is provided in the accommodating hole, a rubber belt is provided on the end of the first telescopic rod, the other end of the rubber belt is connected to the end face of the annular block, the rubber belt is located between the two feed holes, a support member for supporting the rubber belt is provided on the annular block, the support member is T-shaped, and a second telescopic rod with a movable end that is against the rubber belt is provided at one end of the support member facing the adjacent blade edge, and the support member and the second telescopic rod are both located between the two ends of the rubber belt.
[0009] In this solution, the rubber belt between the movable end of the first telescopic rod and the movable end of the second telescopic rod forms an inclined end surface. When the mounting rod rotates to contact the rubber belt, the mounting rod moves along the inclined end surface to the second telescopic rod and the support member, so that the mounting rod drives the blade to no longer fit the support plate; when the cutting size of the plastic particles changes, the driving structure drives the annular block to rotate, thereby adjusting the starting position of the inclined end surface, that is, adjusting the starting position of the blade moving away from the support plate. In addition, the inclination angle of the inclined end surface of the rubber belt is adjusted by extending and retracting the second telescopic rod, so as to adjust the moving speed of the blade away from the support plate, so as to ensure that when the blade cuts plastic particles of different sizes, the incision of the plastic particles is more neat, and the size of the plastic particles is more accurate.
[0010] Furthermore, the cleaning structure includes an annular mounting body, and a plurality of mounting grooves horizontally and perpendicular to the blade are opened on the inner side wall of the mounting body. Scraping members are arranged in the mounting grooves, and the scraping members include a main rod and a plurality of scrapers. The main rod is fixed to the end of the mounting groove away from the mounting rod, and the lengths of adjacent main rods are different. Adjacent scrapers and the main rod and adjacent scrapers are hinged to each other, and torsion springs are arranged at the hinges. The end faces of the scrapers away from the mounting rod are tilted.
[0011] In this solution, when the blade has completed cutting the plastic particles and remains detached from the support plate, the mounting body is driven to slide on the blade. Several scrapers, deflected by torsion springs, deflect until the scrapers contact the blade surface and cutting edge. The scrapers then scrape the blade with their inclined ends, freeing the adhered scraps and plastic particles from the blade, thereby cleaning the blade. Furthermore, the blade wears with constant use, creating recessed areas on the blade surface. Adhering scraps in these recessed areas are more difficult to clean. In this solution, torsion springs are used to ensure that each scraper can conform to the blade, allowing even the recessed areas to be cleaned. Furthermore, the different lengths of the main rods allow a scraper in one mounting slot to reach the connection between the scrapers in the adjacent mounting slot, improving the cleaning effect on the blade.
[0012] Furthermore, a mounting plate is provided on the base, and a plurality of arc grooves coaxial with the power shaft are opened on the mounting plate, and the arc grooves correspond to the feed holes; guide grooves are obliquely provided at both ends of the arc groove, and the adjacent guide groove ends are connected, and the connection between the guide grooves and the connection between the arc grooves are all arc-shaped; a guide rod facing the mounting plate is provided on the mounting body, and a sliding cylinder is coaxially slidably sleeved at the end of the guide rod, and the end of the sliding cylinder is slidably connected to the corresponding arc groove.
[0013] In this solution, when the blade cuts the plastic strips, the sliding cylinder slides in the corresponding arc groove. At this time, the cleaning structure is in the concave cavity. When the blade completes cutting the plastic particles and remains detached from the support plate, the arc groove at the end of the sliding cylinder slides into the corresponding guide groove. The inclination of the two adjacent guide grooves and the sliding cylinder and guide rod are used to drive the installation body to complete sliding and resetting on the blade; when the blade cleaning is completed, the sliding cylinder slides into the next arc groove.
[0014] Furthermore, a protective shell is detachably connected between the mounting plate and the support plate, and a discharge pipe is provided at the bottom of the protective shell.
[0015] Furthermore, an embedding groove for engaging the rubber belt is provided on the support member, and a groove for engaging the rubber belt is provided on the movable end of the second telescopic rod.
[0016] Furthermore, a plurality of guide grooves are provided on the circumference of the power shaft, and a guide block cooperating with the guide grooves is integrally formed on the inner wall of the mounting sleeve.
[0017] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:
[0019] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;
[0020] Figure 2 Schematic diagram of the structure of the support plate in an embodiment of the present invention;
[0021] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;
[0022] Figure 4 Schematic diagram of the cleaning structure in an embodiment of the present invention.
[0023] The markings in the accompanying drawings are as follows: base 1, support plate 2, feed hole 3, power shaft 4, mounting sleeve 5, elastic reset member 6, mounting rod 7, blade 8, annular block 9, rubber belt 10, first telescopic rod 11, support member 12, second telescopic rod 13, mounting body 14, main rod 15, scraper 16, arc groove 17, guide groove 18, guide rod 19, sliding cylinder 20, protective shell 21, discharge pipe 22, guide block 23, mounting plate 24. DETAILED DESCRIPTION
[0024] like Figures 1 to 4 As shown:
[0025] The plastic pelletizer includes a base 1 and a support plate 2 arranged on the base 1, the support plate 2 is provided with a plurality of circumferentially distributed feed holes 3, a concave cavity is provided at the center of the support plate 2, a power shaft 4 is coaxially rotatably provided in the concave cavity, a power device for driving the power shaft 4 is provided in the concave cavity (the power device in this embodiment is driven by a motor, which is a conventional technical means, so it is not described in detail and is not drawn in the figure), a mounting sleeve 5 is coaxially slidably connected to the power shaft 4, and an elastic reset member 6 is provided between the mounting sleeve 5 and the power shaft 4, a plurality of mounting rods 7 perpendicular to the power shaft 4 are fixed on the circumferential side of the mounting sleeve 5, and the number of the mounting rods 7 corresponds to the feed holes 3, a blade 8 that is in contact with the support plate 2 is detachably connected to the mounting rod 7, and an annular cleaning structure is slidably provided on the blade 8, and the cleaning structure is used to clean the surface of the blade 8. When the blade 8 is in contact with the support plate 2, the cleaning structure is located in the concave cavity; a convex structure for pushing the mounting rod 7 away from the support plate 2 is provided in the concave cavity.
[0026] In this solution, the plastic material strips extruded by the screw machine are pulled into the interior of the plastic pelletizer through the feed hole 3, and the power shaft 4 is driven to rotate by the power device, and then the blade 8 is driven to cut the plastic material strips through the mounting sleeve 5 and the mounting rod 7; before the blade 8 contacts the plastic material strips, the mounting sleeve 5 is attached to the support plate 2 under the action of the elastic reset member 6; when the blade 8 rotates to contact the plastic material strips, the cutting is started. During the cutting process, after the mounting rod 7 contacts the convex structure, the convex structure pushes the mounting rod 7 to move away from the support plate 2, thereby driving the blade 8 to move with the plastic material strips The blade 8 moves step by step, so that the incision made by the blade 8 on the material strip remains downward, which makes the cut of the cut plastic particles more neat and the size of the plastic particles more accurate; in addition, when the blade 8 completes the cutting, the distance between the blade 8 and the support plate 2 allows the cleaning structure to pass through, and the cleaning structure is driven to clean the surface of the blade 8 at this time to prevent plastic particles or scraps from adhering to the blade 8 and avoiding affecting the normal cutting of the blade 8; when the cleaning structure is cleaned and reset, the mounting rod 7 is disengaged from the protruding structure, and the elastic reset member 6 drives the blade 8 to fit the support plate 2 again through the mounting sleeve 5 and other structures.
[0027] In this embodiment, the raised structure includes an annular block 9 that is coaxially rotatably arranged in the concave cavity, and a driving structure for driving the annular block 9 to rotate is provided in the concave cavity (the driving structure in this embodiment is driven by a forward and reverse motor, which is a conventional technical means, so it is not described in detail and is not drawn in the figure). The end face of the annular block 9 is provided with a accommodating hole, and a first telescopic rod 11 is provided in the accommodating hole. The end of the first telescopic rod 11 is provided with a rubber belt 10, and the other end of the rubber belt 10 is connected to the end face of the annular block 9. The rubber belt 10 is located between the two feed holes 3. A support 12 for supporting the rubber belt 10 is provided on the annular block 9. The support 12 is T-shaped, and the end of the support 12 facing the cutting edge of the adjacent blade 8 is provided with a second telescopic rod 13 whose movable end is against the rubber belt 10. The support 12 and the second telescopic rod 13 are both located between the two ends of the rubber belt 10. In this embodiment, the first telescopic rod 11 and the second telescopic rod 13 are both electric telescopic rods, which are conventional technical means and are not described in detail.
[0028] In this solution, the rubber belt 10 between the movable end of the first telescopic rod 11 and the movable end of the second telescopic rod 13 forms an inclined end surface. When the mounting rod 7 rotates to contact the rubber belt 10, the mounting rod 7 moves along the inclined end surface to the second telescopic rod 13 and the support member 12, so that the mounting rod 7 drives the blade 8 to no longer fit with the support plate 2; when the cutting size of the plastic particles changes, the annular block 9 is driven to rotate by the driving structure, thereby adjusting the starting position of the inclined end surface, that is, adjusting the starting position of the blade 8 moving away from the support plate 2. In addition, the inclination angle of the inclined end surface of the rubber belt 10 is adjusted by extending and retracting the second telescopic rod 13, and the second telescopic rod 13 drives the end of the rubber belt 10 to move synchronously, so that the rubber belt 10 remains taut, thereby adjusting the moving speed of the blade 8 away from the support plate 2, thereby ensuring that when the blade 8 cuts plastic particles of different sizes, the incision of the plastic particles is more neat, and the size of the plastic particles is more accurate.
[0029] In this embodiment, the cleaning structure includes an annular mounting body 14, and a plurality of mounting grooves horizontally and perpendicular to the blade 8 are opened on the inner side wall of the mounting body 14. Scraping members are arranged in the mounting grooves, and the scraping members include a main rod 15 and a plurality of scrapers 16. The main rod 15 is fixed to the end of the mounting groove away from the mounting rod 7, and the lengths of adjacent main rods 15 are different. Adjacent scrapers 16 and between the main rod 15 and adjacent scrapers 16 are hinged to each other, and torsion springs are provided at the hinges. The end faces of the scrapers 16 away from the mounting rod 7 are all inclined.
[0030] In this embodiment, when the blade 8 has completed cutting the plastic particles and remains separated from the support plate 2, the mounting body 14 is driven to slide on the blade 8. The scrapers 16 are deflected by the torsion spring until the scrapers 16 contact the surface and cutting edge of the blade 8. The scrapers 16 then scrape the blade 8 with their inclined ends, separating the adhered scraps and plastic particles from the blade 8 and thus cleaning the blade 8. In addition, the blade 8 wears with constant use, resulting in concave areas on the surface of the blade 8. The adhered scraps in the concave areas are more difficult to clean. In this embodiment, the torsion spring is used to ensure that each scraper 16 can fit all parts of the blade 8, so that the adhered scraps in the concave areas on the surface of the blade 8 can also be cleaned. At the same time, the different lengths of the main rod 15 allow the scrapers 16 in one mounting slot to clean the connection between the scrapers 16 in the adjacent mounting slot, thus improving the cleaning effect on the blade 8.
[0031] In this embodiment, a mounting plate 24 is provided on the base 1, and a plurality of arc grooves 17 coaxial with the power shaft 4 are opened on the mounting plate 24, and the arc grooves 17 correspond to the feed hole 3; guide grooves 18 are obliquely provided at both ends of the arc groove 17, and the ends of adjacent guide grooves 18 are connected, and the connection between the guide grooves 18 and the guide grooves 18, and the connection between the arc grooves 17 and the guide grooves 18 are all arc-shaped; a guide rod 19 facing the mounting plate 24 is provided on the mounting body 14, and a sliding cylinder 20 is coaxially slidably sleeved at the end of the guide rod 19, and the end of the sliding cylinder 20 is slidably connected to the corresponding arc groove 17.
[0032] In this solution, when the blade 8 cuts the plastic strip, the sliding cylinder 20 slides in the corresponding arc groove 17. At this time, the cleaning structure is in the concave cavity. When the blade 8 completes the cutting of the plastic particles and remains separated from the support plate 2, the arc groove 17 at the end of the sliding cylinder 20 slides into the corresponding guide groove 18. The inclination of the two adjacent guide grooves 18 and the sliding cylinder 20 and the guide rod 19 are used to drive the mounting body 14 to complete the sliding and reset on the blade 8; when the blade 8 is cleaned, the sliding cylinder 20 slides into the next arc groove 17.
[0033] In this embodiment, a protective shell 21 is detachably connected between the mounting plate 24 and the support plate 2 , and a discharge pipe 22 is provided at the bottom of the protective shell 21 .
[0034] In this solution, the protective shell 21 is detachably connected, which facilitates maintenance of the interior of the plastic pelletizer.
[0035] In this embodiment, an embedding groove for engaging the rubber belt 10 is provided on the support member 12 , and a groove for engaging the rubber belt 10 is provided on the movable end of the second telescopic rod 13 .
[0036] In this solution, the embedding groove and the groove are provided to prevent the rubber belt 10 from being separated from the support member 12 and the second telescopic rod 13.
[0037] In this embodiment, a plurality of guide grooves are formed on the circumference of the power shaft 4 , and a guide block 23 cooperating with the guide grooves is integrally formed on the inner wall of the mounting sleeve 5 .
[0038] In this solution, the guide block 23 cooperates with the guide groove to provide a guide while preventing the installation sleeve 5 from rotating relative to the power shaft 4 .
[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.
Claims
1. Plastic pelletizer, characterized by: The invention comprises a base and a support plate arranged on the base, wherein the support plate is provided with a plurality of circumferentially distributed feed holes, a concave cavity is provided at the center of the support plate, a power shaft is coaxially rotated in the concave cavity, a power device for driving the power shaft is provided in the concave cavity, a mounting sleeve is coaxially slidably connected to the power shaft, and an elastic reset part is provided between the mounting sleeve and the power shaft, a plurality of mounting rods perpendicular to the power shaft are fixed on the circumferential side of the mounting sleeve, and the number of the mounting rods corresponds to the feed holes, a blade which is in contact with the support plate is detachably connected to the mounting rod, an annular cleaning structure is slidably provided on the blade, and the cleaning structure is used to clean the surface of the blade, and when the blade is in contact with the support plate, the cleaning structure is located in the concave cavity; a protruding structure for pushing the mounting rod away from the support plate is provided in the concave cavity.
2. The plastic pelletizer according to claim 1, characterized in that: The raised structure includes an annular block that is coaxially rotated in the concave cavity, a driving structure for driving the annular block to rotate is provided in the concave cavity, an accommodating hole is provided on the end face of the annular block, a first telescopic rod is provided in the accommodating hole, a rubber belt is provided on the end of the first telescopic rod, the other end of the rubber belt is connected to the end face of the annular block, the rubber belt is located between the two feed holes, a support member for supporting the rubber belt is provided on the annular block, the support member is T-shaped, and a second telescopic rod with a movable end abutting against the rubber belt is provided at one end of the support member facing the adjacent blade edge, and the support member and the second telescopic rod are both located between the two ends of the rubber belt.
3. The plastic pelletizer according to claim 2, characterized in that: The cleaning structure includes an annular mounting body, and a plurality of mounting grooves horizontally and perpendicular to the blade are opened on the inner side wall of the mounting body. Scraping members are arranged in the mounting grooves, and the scraping members include a main rod and a plurality of scrapers. The main rod is fixed to the end of the mounting groove away from the mounting rod, and the lengths of adjacent main rods are different. Adjacent scrapers and the main rod and adjacent scrapers are hinged to each other, and torsion springs are arranged at the hinges. The end faces of the scrapers away from the mounting rod are tilted.
4. The plastic pelletizer according to claim 3, characterized in that: A mounting plate is provided on the base, and a plurality of arc-shaped grooves coaxial with the power shaft are opened on the mounting plate, and the arc-shaped grooves correspond to the feed holes; guide grooves are obliquely provided at both ends of the arc-shaped grooves, and the adjacent guide groove ends are connected, and the connection between the guide grooves and the connection between the arc-shaped grooves are all arc-shaped; a guide rod facing the mounting plate is provided on the mounting body, and a sliding cylinder is coaxially slidably sleeved at the end of the guide rod, and the end of the sliding cylinder is slidably connected to the corresponding arc-shaped groove.
5. The plastic pelletizer according to claim 4, characterized in that: A protective shell is detachably connected between the mounting plate and the support plate, and a discharge pipe is provided at the bottom of the protective shell.
6. The plastic pelletizer according to claim 5, characterized in that: The support member is provided with an embedding groove for engaging the rubber belt, and the movable end of the second telescopic rod is provided with a groove for engaging the rubber belt.
7. The plastic pelletizer according to claim 6, characterized in that: A plurality of guide grooves are provided on the circumferential side of the power shaft, and a guide block cooperating with the guide grooves is integrally formed on the inner wall of the mounting sleeve.