Extrusion molding granulation device

Abstract

The invention relates to the technical field of extrusion molding granulation, and particularly discloses an extrusion molding granulation device which comprises a granulator body and an extrusion disc, the granulator body further comprises a cutting module, and the cutting module comprises a mounting seat, a plurality of cutting units circumferentially arranged on the mounting seat and a plurality of cleaning units separately arranged on the cutting units; the mounting seat is horizontally and rotatably mounted on the granulator body in the left-right direction; the cutting unit comprises a sliding seat horizontally sliding on the mounting seat left and right. The device has the beneficial effects that the cutter face of the cutter is continuously replaced, the cutter face attached with waste materials reaches the original position again after three times of rotation, in the middle two times of rotation process, the waste materials attached to the cutter can be cooled in time, and after the third time of rotation is completed, the waste materials are scraped away by a scraper plate, so that continuous circulation is achieved, and the cutting efficiency is improved. And the viscosity of the waste cooled on the cutter is greatly reduced, so that the waste can be conveniently scraped by the scraping plate, residues are avoided, and the cutting effect of the cutter is effectively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of extrusion granulation, and particularly relates to an extrusion granulation device. Background Art

[0002] Plastic granulators are important equipment in the plastic processing industry, mainly composed of a feeding system, a melting and extrusion system, a cutting system, and a cooling system. The feeding system is responsible for evenly feeding plastic raw materials into the melting and extrusion system. The melting and extrusion system melts the plastic through heating and mechanical action and continuously extrudes it. The cutting system precisely cuts the molten plastic to form particles. Finally, the cooling system cools and shapes the particles.

[0003] Chinese Patent with the authorization announcement number CN118181573B discloses a plastic granulator, including an extrusion barrel. The end of the extrusion barrel is connected to an extrusion cutting device. By providing a buffer cover, a die barrel communicated with the buffer cover, and extrusion columns and extrusion posts arranged on both sides of the die barrel, quantitative extraction of the plastic melt is achieved. Then, the extrusion post linked with the extrusion column is used to extrude the plastic melt, making the formed plastic strip have a tight texture, which is convenient for subsequent cutting. In addition, when cutting, the extrusion column and the extrusion post are used to clamp both sides of the plastic strip, so that the extruded plastic strip is in a horizontal state during cutting, improving the stability of the plastic strip during cutting. Through quantitative extraction, extrusion, and horizontal clamping and traction, the formed plastic particles have a tight texture and smooth cut seams, improving the forming quality of the plastic particles.

[0004] When the cutting knife cuts the extruded plastic, the plastic will adhere to the knife. In the above technical solution, even if the centrifugal force of the cutting knife is used to throw out the plastic particles, due to the certain viscosity of the plastic particles, there will still be residues on the cutting knife. Therefore, when the residues of the plastic gradually increase, it will affect the appearance performance of the cut plastic particles, thereby reducing the production quality. Moreover, when too much plastic adheres to the cutting knife, it will be difficult to clean in the later stage. Summary of the Invention

[0005] The present invention provides an extrusion granulation device, aiming to solve the technical problem that when the cutting knife cuts the extruded plastic, the plastic will adhere to the knife. In the above technical solution, even if the centrifugal force of the cutting knife is used to throw out the plastic particles, due to the certain viscosity of the plastic particles, there will still be residues on the cutting knife. Therefore, when the residues of the plastic gradually increase, it will affect the appearance performance of the cut plastic particles, thereby reducing the production quality. Moreover, when too much plastic adheres to the cutting knife, it will be difficult to clean in the later stage.

[0006] An extrusion granulation device of the present invention includes a granulator body and an extrusion disk. The granulator body further includes a cutting module. The cutting module includes a mounting seat, a plurality of cutting units circumferentially arranged on the mounting seat, and a plurality of cleaning units respectively arranged on the cutting units. The mounting seat is horizontally rotatably mounted on the granulator body in the left-right direction. The cutting unit includes a sliding seat horizontally sliding left and right on the mounting seat. A cutter with an equilateral triangle cross-section is rotatably mounted on the sliding seat. The rotation axis of the cutter is perpendicular to the axis of the mounting seat, and the cutting surface of the cutter is horizontally arranged left and right. A driving structure for driving the cutter to rotate is provided on the sliding seat. A driving unit for driving the sliding seat to move left and right is also provided on the granulator body. The cleaning unit includes a bearing plate elastically slidingly fitted on the sliding seat. A scraping plate is elastically slidably mounted on the bearing plate. A transmission component is provided on the bearing plate that can drive the bearing plate away from the cutter when the sliding seat moves. The sliding seat has a cutting position and a moving position, and alternately moves between the two. When moving towards the moving position, the bearing plate moves away from the cutter, and the cutter rotates 120 degrees. When moving towards the cutting position, the scraping plate abuts against the cutting surface of the cutter to clean the cutting surface.

[0007] Beneficial effects: After the plane at the rear of the cutter completes one cutting operation, the sliding seat reciprocates once, causing the cutter to rotate 120 degrees. During the continuous rotation process, the cutter continuously changes the cutting surface. The cutting surface with attached waste reaches the original position again after three rotations. During the middle two rotations, this cutting surface no longer performs cutting work. Therefore, the waste attached to the cutter has time to cool down. After the third rotation, during the process of the sliding seat driving the cutter to return, the scraping plate scrapes off the waste. This is the case for each cutting surface of the cutter, thus realizing continuous circulation. The viscosity of the waste cooled on the cutter is greatly reduced. When the scraping plate performs scraping, it can also avoid reattachment to the scraping plate, facilitating the complete scraping of the waste and avoiding residue. At the same time, it can ensure that the cutting surface of the cutter is replaced and cleaned each time, effectively guaranteeing the cutting effect of the cutter and also ensuring the production quality.

[0008] Preferably, the driving structure includes a one-way gear rotatably mounted on the sliding seat and connected to the rotating shaft of the cutter. A rack meshing with the one-way gear is provided on the mounting seat. When the sliding seat moves, the rack can drive the one-way gear to rotate, and the bearing plate abuts against the cutting surface of the cutter to limit the cutter during cutting.

[0009] The effect is that it can drive the cutter to rotate during the movement of the sliding seat.

[0010] Preferably, the transmission assembly includes a slider disposed on the bearing plate. A sliding hole is formed in the sliding seat, and the slider is slidably fitted in the sliding hole. An inclined guide groove is provided in the sliding hole, and one end of the bearing plate abuts against the mounting seat. A guide post is provided on the slider, one end of the guide post penetrates into the guide groove, and the guide post is in stop fit with the side wall of the guide groove, so that when the sliding seat moves toward the moving position, the bearing plate can move away from the cutting tool.

[0011] The effect is that during the movement of the sliding seat, the bearing plate can be driven away from the cutting tool to avoid the rotation of the cutting tool.

[0012] Preferably, a blowing member is provided on the slider, and the blowing member is located in the sliding hole. The air outlet end of the blowing member faces the surface of the cutting tool adjacent to the cutting surface.

[0013] The effect is that it can blow air on the waste attached to the cutting tool to help it cool faster.

[0014] Preferably, a driving ring is fixedly installed on the granulator body. The driving ring is located outside the mounting seat and is coaxially arranged with the mounting seat. A plurality of protrusions are uniformly spaced along the circumferential direction on the left and right side surfaces of the driving ring. The protrusions on the left and right side surfaces of the driving ring are arranged in a staggered manner. A U-shaped receiving groove is provided on the sliding seat. The receiving groove has opposite side walls. A buffer plate is horizontally slidably connected to the left side wall through a spring. The right side wall of the receiving groove is a plane. The buffer plate and the right side wall of the receiving groove respectively abut against the left and right side surfaces of the driving ring. The protrusions on both sides of the driving ring can alternately push the sliding seat to move.

[0015] Preferably, an extension plate is horizontally elastically slidably connected to the bearing plate along the left and right directions. The scraping plate is elastically slidably connected to the extension plate. A guiding block is provided on the extension plate. A driving groove is provided on the mounting seat. The guiding block is located in the driving groove. The driving groove has an inclined pushing surface, so that during the movement of the sliding seat toward the moving position, the pushing surface can force the guiding block to move, causing the extension plate to slide and expand along the bearing plate.

[0016] Preferably, a bearing cavity is provided on the sliding seat, and the cutting tool is installed in the bearing cavity. A collection box communicating with the bearing cavity is provided on the sliding seat.

[0017] Preferably, a blanking inclined plate is provided inside the collection box.

[0018] The effect is that when the collection box is inverted, the waste inside will not flow out in the reverse direction.

[0019] Preferably, the cross section of the protrusion is in an isosceles trapezoid structure.

[0020] Preferably, the blowing member is an airbag.

[0021] With the above technical solution, the beneficial effects of the present invention are as follows: After a cutting operation is completed on the plane at the rear side of the cutting knife, the sliding seat reciprocates once, causing the cutting knife to rotate 120 degrees. During the continuous rotation process, the cutting knife constantly changes its cutting surface. The cutting surface with waste adheres to it reaches the original position again after three rotations. During the middle two rotations, this cutting surface no longer performs cutting work. Therefore, the waste adhering to the cutting knife has time to cool down. After the third rotation, during the process of the sliding seat driving the cutting knife to return, the scraper scrapes off the waste. This is the case for each cutting surface of the cutting knife, thereby realizing continuous circulation. The viscosity of the waste cooled on the cutting knife is greatly reduced. When the scraper performs scraping, it can also avoid re - adhering to the scraper, facilitating the complete scraping of the waste and avoiding residue. At the same time, it can ensure that the cutting surface of the cutting knife is replaced and cleaned each time cutting is performed, effectively guaranteeing the cutting effect of the cutting knife and also ensuring the production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 is a cross - sectional view of the present invention.

[0024] Figure 3 of the present invention Figure 2 is an enlarged view of part A in

[0025] Figure 4 is a schematic diagram of the structure of the mounting seat of the present invention.

[0026] Figure 5 is an exploded view of the support and the sliding seat of the present invention.

[0027] Figure 6 is an exploded view of the sliding seat and the bearing plate of the present invention.

[0028] Figure 7 is a schematic diagram of the structure of the sliding seat of the present invention.

[0029] Figure 8 is a schematic diagram of the state when the extension plate of the present invention is unfolded.

[0030] Figure 9 is a cross - sectional view of the sliding seat of the present invention.

[0031] Figure 10 is a top view of the top plate of the present invention.

[0032] Figure 11 is a schematic diagram of the structure of the driving ring of the present invention.

[0033] Reference Signs: 10. Granulator body; 11. Extrusion disc; 12. Extrusion holes; 20. Outer shell; 21. Mounting seat; 22. Support; 23. Guide rod; 24. Top plate; 25. Rack; 30. Sliding seat; 31. Sliding hole; 32. Receiving groove; 33. Buffer plate; 34. Cutter; 35. One-way gear; 36. Bearing cavity; 37. Collection box; 40. Driving ring; 41. Protrusion; 42. Groove; 50. Bearing plate; 51. Slide block; 52. Guide post; 53. Guide groove; 54. Blowing part; 55. Return spring; 60. Extension plate; 61. Guide block; 62. Scraper; 63. Driving groove; 64. Pushing surface. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0035] As Figures 1 to 11 shown, a specific embodiment of an extrusion granulation device of the present invention includes a granulator body 10 and a cutting module; the cutting module includes a bearing unit, a cutting unit, a driving unit, and a cleaning unit.

[0036] As Figure 1 , Figure 2 and Figure 3 shown, the granulator body 10 further includes an outer shell 20 and an extrusion disc 11. The outer shell 20 is arranged on the left side of the granulator body 10, and the extrusion end of the granulator body 10 extends into the interior of the outer shell 20. The extrusion disc 11 is arranged at the extrusion end of the granulator body 10, and a plurality of extrusion holes 12 are uniformly arranged along the circumferential direction of the extrusion disc 11. The granulator body 10 can continuously extrude plastics from the extrusion holes 12.

[0037] As Figure 1 shown, the base of the granulator body 10 is of a rectangular structure. The length direction thereof is defined as the left-right direction, and the width direction thereof is defined as the front-back direction.

[0038] As Figure 1 , Figure 4 and Figure 5 shown, the bearing unit includes a mounting seat 21, a support 22, a guide rod 23, and a top plate 24.

[0039] The mounting seat 21 is horizontally rotatably mounted in the outer shell 20 along the left-right direction, and the right end of the mounting seat 21 is rotationally matched with the inner wall of the outer shell 20. There is a certain distance between the left end of the mounting seat 21 and the extrusion disc 11. A motor for driving the mounting seat 21 to rotate is installed outside the outer shell 20.

[0040] A plurality of supports 22 are evenly arranged along the circumferential direction on the outer peripheral wall of the mounting base 21 near the right end, and the axes of the supports 22 and the mounting base 21 are both vertically arranged. In this embodiment, four supports 22 are provided.

[0041] Each support 22 is provided with a through hole that penetrates left and right, and two guide rods 23 are horizontally arranged at intervals along the axial direction of the support 22, and the guide rods 23 are perpendicular to the through hole on the support 22. At the end of the support 22 far from the mounting base 21, a top plate 24 is fixedly installed, and the top plate 24 is parallel to the axis of the mounting base 21.

[0042] In this embodiment, four cutting units are provided and are respectively installed on the four supports 22.

[0043] As Figure 4 、 Figure 5 、 Figure 6 and Figure 7 shown, each cutting unit includes a sliding seat 30, a buffer plate 33, a cutting knife 34, a one-way gear 35 and a collection box 37.

[0044] The four cutting units are respectively arranged on the four supports 22, so the four cutting units are also evenly distributed along the circumferential direction of the mounting base 21, and the four cutting units are respectively arranged in the four directions of up, down, left and right. The structures of the four cutting units are exactly the same. For the convenience of understanding, the following will take one of the cutting units located at the top for an expanded description.

[0045] The sliding seat 30 is horizontally slidably installed on the support 22 in the left-right direction (the axial direction of the mounting base 21). Two sliding holes 31 that penetrate front and back are spaced apart in the vertical direction on the sliding seat 30, and the length of the sliding holes 31 is arranged in the left-right direction. The two guide rods 23 on the support 22 respectively pass through the two sliding holes 31 on the sliding seat 30, so that when the sliding seat 30 moves left and right on the support 22, the guide rods 23 can play a guiding and limiting role.

[0046] In other embodiments, the installation method of the sliding seat 30 and the support 22 is not limited to this, and it can also be a matching method of a convex block and a sliding groove, which can also realize the sliding of the sliding seat 30 on the support 22.

[0047] A receiving groove 32 is provided on the right side of the sliding seat 30. The receiving groove 32 is of a U-shaped structure, and the openings of the receiving grooves 32 in each cutting unit face the mounting base 21. The receiving groove 32 has opposite side walls. A buffer plate 33 is horizontally slidably connected to the left side wall through a spring, and the right side wall of the receiving groove 32 is a plane. The driving unit can push the buffer plate 33 and the right side wall of the receiving groove 32, so as to realize the horizontal reciprocating movement of the sliding seat 30, which will be described in detail later.

[0048] On the right side of the sliding seat 30, there is a bearing cavity 36. The bearing cavity 36 has two side walls, and the two side walls are in an L-shaped structure (as Figure 6 shown in Figure 7 ), that is, the bearing cavity 36 is an open structure on the right side and the rear side. A cutting knife 34 is rotatably installed in the bearing cavity 36 through a rotating shaft. The axis of the rotating shaft of the bearing cavity 36 is arranged vertically and perpendicular to the axis of the mounting seat 21.

[0049] The cutting knife 34 is in an equilateral triangle structure, and the central axis of the cutting knife 34 coincides with the axis of its rotating shaft. During the cutting process, the tip of the cutting knife 34 faces forward and abuts against the front side wall of the bearing cavity 36. The rear side of the cutting knife 34 is a plane, and the cleaning unit will abut against the plane on the rear side of the cutting knife 34, so as to ensure the stability of the cutting knife 34 during the cutting process and prevent the cutting knife 34 from rotating during the cutting process. The right end of the cutting knife 34 extends outside the bearing cavity 36, that is. The tip on the right side of the cutting knife 34 protrudes from the right side surface of the sliding seat 30. During the working process of the cutting knife 34, the tip on the right side of the cutting knife 34 abuts against the left side surface of the extrusion disc 11. The mounting seat 21 will drive the cutting knife 34 to continuously rotate around the axis of the mounting seat 21, and the cutting knife 34 can continuously cut the material extruded from the extrusion holes 12 on the extrusion disc 11 into granular form during the rotation process. It should be particularly noted that the plane on the rear side of the cutting knife 34 faces the rotation direction, that is, the plane on the rear side of the cutting knife 34 will continuously turn towards the material, so as to cut the continuously extruded material by relying on the shearing force between the right end of the cutting knife 34 and the extrusion disc 11. Therefore, during the continuous cutting process, the material will continuously adhere to the plane on the rear side of the cutting knife 34.

[0050] A one-way gear 35 is rotatably installed on the top of the top plate 24, and the one-way gear 35 is connected to the rotating shaft of the cutting knife 34. Thus, when the one-way gear 35 rotates, it can drive the cutting knife 34 to rotate simultaneously. And the structure of the one-way gear 35 can ensure that the cutting knife 34 can only rotate in one direction.

[0051] As Figure 10 shown, a rack 25 meshing with the one-way gear 35 is arranged on the top plate 24. When the driving unit drives the sliding seat 30 to move to the left side (away from the extrusion disc 11), since the top plate 24 is fixed to the support 22, relative movement will occur between the sliding seat 30 and the top plate 24, that is, relative movement will occur between the one-way gear 35 and the rack 25. The rack 25 will force the one-way gear 35 to rotate, so that the one-way gear 35 drives the cutting knife 34 to rotate. It should be particularly emphasized that the cutting knife 34 rotates 120 degrees each time it rotates, so that the three faces of the cutting knife 34 can be continuously replaced.

[0052] To Figure 9Taking the cutting knife 34 as an example, the plane above the cutting knife 34 is the cutting surface. When the one-way gear 35 rotates, the cutting knife 34 will rotate in the clockwise direction. The originally upper plane will rotate 120 degrees clockwise to reach the inclined surface position on the right side of the cutting knife 34. As the cutting knife 34 rotates again, the plane that has rotated to the right inclined surface position will continue to rotate 120 degrees clockwise to reach the inclined surface position on the left side of the cutting knife 34, and the left inclined surface will face the inside of the bearing cavity 36. Finally, when the cutting knife 34 rotates for the third time, it will return to the original position.

[0053] It should be particularly emphasized that during the process of the sliding seat 30 moving to the left, the cutting knife 34 rotates 120 degrees to change the surface. During the process of the sliding seat 30 moving to the right (resetting), due to the one-way gear 35, the cutting knife 34 will not rotate again until the end of the cutting knife 34 abuts against the extrusion disc 11 again for cutting.

[0054] As Figure 4 shown in Figure 11 the figure, the driving unit includes a driving ring 40 and a protrusion 41.

[0055] The driving ring 40 is located outside the mounting seat 21, and the driving ring 40 is coaxially arranged with the mounting seat 21. A plurality of fixing rods are fixedly installed on the inner side surface of the driving ring 40 along its circumference, and the fixing rods are fixedly installed on the outer shell 20, thereby realizing the fixation of the driving ring 40.

[0056] A plurality of protrusions 41 are evenly spaced along the circumference on both the left and right side surfaces of the driving ring 40, and the cross-section of the protrusion 41 is in an isosceles trapezoid structure. A groove 42 is formed between two adjacent protrusions 41 on each side of the driving ring 40, and the shape of the groove 42 matches the shape of the protrusion 41.

[0057] It should be particularly emphasized that the protrusions 41 on the left and right side surfaces of the driving ring 40 are arranged in a staggered manner (as Figure 11 shown), that is, the protrusions 41 on the left side surface of the driving ring 40 correspond to the grooves 42 on the right side surface.

[0058] The driving ring 40 is located in the receiving groove 32. At the initial position, the buffer plate 33 in the receiving groove 32 abuts in the groove 42 on the left side surface of the driving ring 40, and the protrusion 41 on the right side surface of the driving ring 40 abuts against the right side wall of the receiving groove 32. At this time, the stability of the sliding seat 30 can be ensured and the cutting knife 34 can be prevented from moving.

[0059] When the sliding seat 30 rotates circumferentially, the buffer plate 33 located in the left groove 42 gradually begins to contact the inclined surface on the groove 42, thereby forcing the buffer plate 33 to move to the left. The spring on the buffer plate 33 is gradually compressed. At this time, the right side wall of the receiving groove 32 still contacts the protrusion 41 on the right side surface of the driving ring 40, so the sliding seat 30 does not move. As the sliding seat 30 rotates, until the right side wall of the receiving groove 32 corresponds to the groove 42 on the right side surface of the driving ring 40, the buffer plate 33 just completely reaches the protrusion 41 on the left side of the driving ring 40, and the spring on the buffer plate 33 will be quickly released, causing the sliding seat 30 to move to the left. That is, the right side wall of the receiving groove 32 contacts the bottom of the groove 42 on the right side surface of the driving ring 40, realizing the sliding of the sliding seat 30. Similarly, as the sliding seat 30 continues to rotate, the buffer plate 33 alternates between the protrusion 41 on the left side of the driving ring 40 and the groove 42, realizing the continuous reciprocating movement of the sliding seat 30 to the left and right.

[0060] It should be particularly emphasized that when the cutting tool 34 passes between two adjacent extrusion holes 12, the sliding seat 30 completes a reciprocating movement, that is, completes a surface change of the cutting tool 34, so as not to affect the continuous cutting of the material extruded from the extrusion holes 12. In this embodiment, the rotational speed of the mounting seat 21 is low. The number of protrusions 41 on both sides of the driving ring 40 corresponds to the number of extrusion holes 12. The number of protrusions 41 in this embodiment is only exemplary and can be set according to actual production requirements.

[0061] As Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 shown, the cleaning unit includes a carrier plate 50, a slider 51, a guide post 52, a blowing member 54, a return spring 55, an extension plate 60, a guide block 61 and a scraper 62.

[0062] A carrier plate 50 is slidably installed at the rear side of the sliding seat 30. Two sliders 51 are arranged on the carrier plate 50 at intervals in the vertical direction, and the sliders 51 are respectively slidably fitted in two sliding holes 31 on the sliding seat 30. A return spring 55 is arranged on the slider 51, and the other end of the return spring 55 is connected to the sliding seat 30, and the left end of the carrier plate 50 abuts against the support 22 (as Figure 9 ).

[0063] Guide grooves 53 are arranged on the top wall and the bottom wall of each sliding hole 31, and the guide grooves 53 are inclined gradually backward from the front from left to right. Guide posts 52 are arranged on the upper and lower sides of the slider 51, and one end of the guide post 52 penetrates into the corresponding guide groove 53, and the guide post 52 is used for blocking and cooperating with the side wall of the guide groove 53.

[0064] Thus, when the sliding seat 30 moves to the left, since the left end of the bearing plate 50 abuts against the support 22, the bearing plate 50 will be forced to gradually move backward along the guide groove 53, that is, the bearing plate 50 will move backward away from the sliding seat 30. The purpose is to avoid the cutting knife 34 and ensure that the cutting knife 34 has enough space to rotate.

[0065] In addition, it should be particularly noted that among the four bearing plates 50 on the circumferential direction of the mounting seat 21, the two bearing plates 50 located in the vertical direction move away from the sliding seat 30 in the front-back direction respectively, and the two bearing plates 50 in the front-back horizontal direction move away from the sliding seat 30 in the up-down direction respectively.

[0066] A blowing member 54 is further provided on the slider 51. In this embodiment, the blowing member 54 is an airbag, and the airbag is communicated with the bearing cavity 36. Thus, when the slider 51 moves in the sliding hole 31, the airbag will be squeezed, so that the gas blown out by the airbag can blow onto the surface of the cutting knife 34 (the left side surface of the cutting knife 34) located inside the bearing cavity 36, which can effectively help cool the material remaining on the cutting knife 34, thus facilitating the subsequent complete scraping of it.

[0067] In this embodiment, the distance that the protrusion 41 can drive the sliding seat 30 to move is limited, so an extension plate 60 is further provided. The extension plate 60 is horizontally slidably mounted on the rear side surface of the bearing plate 50 through a spring. In the initial state, the right end of the extension plate 60 abuts against the horizontal surface behind the cutting knife 34 (such as Figure 9 ), so as to limit the cutting knife 34 and prevent the cutting knife 34 from rotating.

[0068] A guide block 61 is provided on the extension plate 60, and a driving groove 63 is provided on the top plate 24. The guide block 61 is located in the driving groove 63. The driving groove 63 has a pushing surface 64, and the pushing surface 64 is an inclined surface, and the inclination direction is the same as the direction of the guide groove 53. Thus, when the sliding seat 30 moves to the left, the guide block 61 will move along the pushing surface 64 until it moves to the outside of the driving groove 63. At this time, the extension plate 60 slides to the right along the bearing plate 50 and unfolds, and the spring on the extension plate 60 is stretched.

[0069] A scraper 62 is horizontally slidably mounted on the extension plate 60 through springs. When the cutting knife 34 moves to the left, the bearing plate 50 drives the scraper 62 away from the cutting knife 34 to ensure the rotation of the cutting knife 34. When the cutting knife 34 moves to the left, at this time, the scraper 62 is located at the right rear side of the cutting knife 34. When the sliding seat 30 drives the cutting knife 34 to move to the right, the scraper 62 gradually contacts the rear plane of the cutting knife 34, thereby scraping off the material attached to the rear plane of the cutting knife 34. The scrap after scraping falls into the collection box 37 below through the bearing cavity 36. It should be noted in particular that a blanking inclined plate is provided inside the collection box 37, so that the inside is a one-way feeding structure. As the mounting seat 21 rotates, the collection box 37 originally located below the bearing cavity 36 rotates to the upper side, which can prevent the scrap inside from falling out. At this time, the scrap scraped off can be temporarily stored in the bearing cavity 36. When the collection box 37 is located below the bearing cavity 36, the material will fall back into the collection box 37 again.

[0070] In other embodiments, the collection box 37 can also collect waste by means of negative pressure suction.

[0071] Generally speaking, after the plane on the rear side of the cutting knife 34 completes one cutting operation, the sliding seat 30 reciprocates once, causing the cutting knife 34 to rotate 120 degrees. During the continuous rotation process, the cutting knife 34 continuously changes the cutting surface. During the two rotation processes of the cutting surface attached with waste, the waste attached to the cutting knife 34 can be cooled. During the third rotation, the scraper 62 scrapes off the waste. The cooled waste is easy to scrape clean, avoiding residue. Each cutting surface of the cutting knife 34 is like this, so as to achieve continuous circulation.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An extrusion granulation device, comprising: The granulator body and the extrusion disc are characterized in that the granulator body further includes a cutting module, the cutting module includes a mounting seat, a plurality of cutting units circumferentially arranged on the mounting seat, and a plurality of cleaning units respectively arranged on the cutting units, and the mounting seat is horizontally rotatably mounted on the granulator body in the left-right direction; The cutting unit includes a sliding seat horizontally sliding left and right on the mounting seat. A cutter with an equilateral triangle cross-section is rotatably mounted on the sliding seat. The rotation axis of the cutter is perpendicular to the axis of the mounting seat, and the cutting surface of the cutter is horizontally arranged left and right. A driving structure for driving the cutter to rotate is provided on the sliding seat, and a driving unit for driving the sliding seat to move left and right is further provided on the granulator body; The cleaning unit includes a bearing plate elastically slidingly fitted on the sliding seat. A scraper is elastically slidably mounted on the bearing plate. A transmission component is provided on the bearing plate, which can drive the bearing plate to move away from the cutter when the sliding seat moves; The sliding seat has a cutting position and a moving position, and alternately moves between the two. When moving towards the moving position, the bearing plate moves away from the cutter, and the cutter rotates 120 degrees. When moving towards the cutting position, the scraper abuts against the cutting surface of the cutter to clean the cutting surface.

2. The extrusion granulation device according to claim 1, wherein, The driving structure includes a one-way gear rotatably mounted on the sliding seat and connected to the rotating shaft of the cutter. A rack meshing with the one-way gear is provided on the mounting seat, so that when the sliding seat moves, the rack can drive the one-way gear to rotate, and the bearing plate abuts against the cutting surface of the cutter to limit the cutter during cutting.

3. The extrusion granulation device according to claim 1, characterized in that, The transmission component includes a slider provided on the bearing plate. A sliding hole is formed on the sliding seat. The slider is slidably fitted in the sliding hole. An inclined guide groove is provided in the sliding hole, and one end of the bearing plate abuts against the mounting seat. A guide post is provided on the slider. One end of the guide post penetrates into the guide groove, and the guide post is in blocking fit with the side wall of the guide groove, so that when the sliding seat moves towards the moving position, the bearing plate can move away from the cutter.

4. The extrusion granulation device according to claim 3, wherein A blowing member is provided on the slider, and the blowing member is located in the sliding hole. The air outlet end of the blowing member faces the surface adjacent to the cutting surface of the cutter.

5. A plastic extrusion granulation device according to any one of claims 1-4, characterized in that, A driving ring is fixedly mounted on the granulator body. The driving ring is located outside the mounting seat and is coaxially arranged with the mounting seat. A plurality of protrusions are evenly spaced along the circumferential direction on both the left and right side surfaces of the driving ring. The protrusions on the left and right side surfaces of the driving ring are arranged in a staggered manner. A U-shaped receiving groove is provided on the sliding seat. The receiving groove has opposite side walls. A buffer plate is horizontally slidably connected to the left side wall through a spring. The right side wall of the receiving groove is a plane. The buffer plate and the right side wall of the receiving groove respectively abut against the left and right side surfaces of the driving ring. The protrusions on both sides of the driving ring can alternately push the sliding seat to move.

6. The extrusion granulation device according to claim 1, characterized in that, An extension plate is horizontally elastically slidably connected to the bearing plate in the left-right direction. The scraper is elastically slidably connected to the extension plate. A guide block is provided on the extension plate. A driving groove is provided on the mounting seat. The guide block is located in the driving groove. The driving groove has an inclined pushing surface, so that during the process of the sliding seat moving towards the moving position, the pushing surface can force the guide block to move, so that the extension plate slides and unfolds along the bearing plate.

7. An extrusion granulation device according to claim 1, characterized in that, A bearing cavity is provided on the sliding seat. The cutter is installed in the bearing cavity. A collection box communicating with the bearing cavity is provided on the sliding seat.

8. An extrusion granulation device according to claim 7, characterized in that, A blanking inclined plate is arranged inside the collection box.

9. The extrusion granulation device according to claim 5, characterized in that, The cross-section of the protrusion is in an isosceles trapezoid structure.

10. A plastic extrusion granulation device according to claim 4, characterized in that, The blowing member is an airbag.

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