Nylon sliver cutter

Abstract

The application discloses a nylon cutting machine, and belongs to the field of granulation and cutting. The machine comprises an extrusion device for extruding a strip-shaped nylon strip outward, and a cutting device for cutting the nylon strip after the nylon strip passes through a cold water tank. The cutting device comprises a bottom cutter on which the nylon strip is arranged, a rotating shaft provided with a plurality of insertion grooves in a radial direction, a cutter piece provided with an insertion part inserted into the insertion grooves and a cutting part fixed to the insertion part, a buckling piece provided with a buckling groove, the buckling piece being arranged at an end of the rotating shaft, and a groove wall of the buckling groove abutting against the rotating shaft and the insertion part, and a driving piece for driving the rotating shaft to rotate so that the cutting part and the bottom cutter cut the nylon strip. The application has the beneficial effect that the cutting part can be replaced singly by virtue of detachable connection, the whole cutter piece does not need to be replaced, and the cost of later maintenance can be greatly reduced.

Description

Technical Field

[0001] This application relates to the field of pelleting and pelletizing, and in particular to a nylon pelletizer. Background Technology

[0002] Currently, nylon pelleting is carried out using water cooling. The pelleting process involves first extruding nylon strips in an extruder, then having workers pull the nylon strips out. The nylon strips first pass through a cold water tank and then are sent to the drive of a pelletizer. The drive of the pelletizer pulls the nylon strips for transport, so that the nylon strips are transported to the pelletizing module of the pelletizer for pelletizing.

[0003] The pelletizing process involves rotating a cutter shaft to cut the nylon strip. There are several methods of rotary cutting, such as using two cutter shafts in combination, where the nylon strip passes between the two shafts and the rotation of the shafts cuts the nylon strip; or using one cutter shaft in combination with a fixed-position cutter, where the nylon strip passes between the two and the rotation of the shaft cuts the nylon strip. After rotary cutting, nylon pellets are obtained, thus achieving pelleting.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist:

[0005] The cutter shaft contains multiple one-piece molded cutters to cut more nylon strips per rotation. However, when the nylon strip is fed to the cutter shaft for rotary cutting, if some parts of the nylon strip are too hard (potentially due to impurities in the nylon raw material), the cutter shaft may subject one of the cutters to excessive cutting force, leading to damage. Furthermore, with prolonged use, some cutters may also become damaged. This often results in the need to replace the entire cutter shaft when only one cutter is damaged, leading to excessively high operating and maintenance costs. Summary of the Invention

[0006] To address the problem that replacing the entire cutter shaft is necessary when a single cutter body is damaged, resulting in excessively high operating and maintenance costs for the cutter shaft, this application provides a nylon pelletizer.

[0007] The nylon pelletizer provided in this application adopts the following technical solution:

[0008] A nylon pelletizing machine includes: an extrusion device for extruding a strip of nylon; a pelletizing device for cutting the nylon strip after it passes through a cold water tank; the pelletizing device includes: a bottom blade on which the nylon strip rests; a rotating shaft with multiple slots in a radial direction; a cutting member having an insertion portion that inserts into the slots and a cutting portion fixed to the insertion portion; a fastening member having a fastening groove at the end of the rotating shaft, the groove wall of the fastening groove abutting against the rotating shaft and the insertion portion; and a driving member for driving the rotating shaft to rotate so that the cutting portion and the bottom blade pelletize the nylon strip.

[0009] By employing the aforementioned technical solution, the cutting blade achieves cutting through multiple detachable cutting sections. However, after prolonged use and wear, this can lead to nylon pellets trailing during the nylon pelletizing process, resulting in poor pellet quality. The detachable connection of the cutting sections allows for individual replacement of worn sections without needing to replace the entire blade assembly, significantly reducing maintenance costs. Furthermore, the fastening mechanism engages with the rotating shaft, securing the cutting section to the shaft. Disassembly is simple: just open the fastening mechanism and remove the corresponding cutting section. This facilitates maintenance, and the detachable structure is simple, reliable, cost-effective, and speeds up routine maintenance.

[0010] Optionally, the end of the cut portion forms a cutting line; on a horizontal plane, the cutting line is inclined at 5-15° to the axis of the rotation shaft; on a vertical plane, the cutting line is inclined at 3-9° to the axis of the rotation shaft.

[0011] By adopting the above technical solution and utilizing the inclined setting of the cutting line, the cutting part can better cooperate with the bottom blade to cut the nylon strip into granules.

[0012] Optionally, the cutting part is a rigid blade body, a heating wire, or a rigid cutting wire, and / or the bottom blade is a rigid conductor, a heating wire, or a rigid cutting wire.

[0013] Optionally, the length of the rotating shaft is greater than the length of the cut portion, and the length of the insertion portion matches the length of the rotating shaft; the fastening member includes a fastening cover, the fastening cover forming the fastening groove, the fastening groove being the inner groove of the fastening cover; the end of the fastening cover abuts against the cut portion, and the inner wall of the fastening groove abuts against the outer wall of the rotating shaft and the insertion portion simultaneously.

[0014] By adopting the above technical solution, the locking groove and the cutting part are pressed together, which can fix the position of the cutting part, making the cutting part more firmly fixed on the rotating shaft, and making the pelletizing process more stable and reliable.

[0015] Optionally, the insertion part has a first inclined surface and a second inclined surface; the first inclined surface is located at one end of the insertion part, and the second inclined surface is located at the other end of the insertion part; two sets of fastening members are provided, respectively located at both ends of the rotating shaft; the fastening members further include inserts, wherein the insert of one fastening member is filled between the first inclined surface and the inner wall of the slot; and the insert of the other fastening member is filled between the second inclined surface and the inner wall of the slot.

[0016] By adopting the above technical solution, utilizing the first and second inclined surfaces on the insertion part and filling the insertion strip inside, the insertion part can be more tightly secured to the inner wall of the slot, and the cutting part can be better fixed to the rotating shaft.

[0017] Optionally, the insertion part further has a flat surface located between the first inclined surface and the second inclined surface; the flat surface abuts against the inner wall of the slot; both the first inclined surface and the second inclined surface are connected to the flat surface, a first filling groove is formed between the first inclined surface and the inner wall of the slot, and a second filling groove is formed between the second inclined surface and the inner wall of the slot; both the first filling groove and the second filling groove are triangular in shape; the insertion strip is trapezoidal in shape.

[0018] By adopting the above technical solution, the flat surface is designed to fix the position of the insert in the slot, that is, to fix the position of the insert and prevent it from shaking. Then, the insert strip is filled, allowing for accurate filling and improving installation speed. The insert strip is trapezoidal in shape, while the first and second filling grooves are triangular. Therefore, after filling, the insert strip can be placed in different positions to provide varying degrees of pressure on the insert. Alternatively, if there are errors in the insert's position, the insert strip can be placed in different positions to improve the adaptability of the insert's fixation.

[0019] Optionally, the fastening cover is provided with a fastening screw hole, and a fastening screw is provided in the fastening screw hole; the fastening screw is rotatably engaged with the insert. Multiple measures, including insert filling, fine-tuning and tightening of the fastening screw, and magnetic assisted positioning, ensure the rigidity and connection stability of the cutting part under high-speed rotation conditions, avoiding decreased cutting accuracy or vibration problems caused by tool loosening.

[0020] By adopting the above technical solution, after the fastening cover is fixed to the rotating shaft, the insert can be tightly filled in the first and second filling grooves by rotating the fastening screw. This facilitates quick adjustment of the insert when wear occurs, ensuring the insert is stably fixed in the slot. Since two sets of fastening components are provided, the insert on one fastening component can be partially pulled out of the first filling groove, while the slot on the other fastening component is partially filled in the second filling groove. This also allows for quick adjustment of the insert when wear occurs, maintaining the insert stably fixed in the slot. Simultaneously, the position of the insert and fastening cover can be adjusted. When the rotating shaft is damaged or other parts deform due to prolonged use, causing dynamic imbalance problems in the rotation of the rotating shaft and cutting part, the position adjustment of the insert and fastening cover can adjust the overall mass distribution of the rotating shaft and some parts on it, controlling the dynamic balance error within a small range.

[0021] Optionally, the fastening screw is provided with an abutment rod, the abutment rod is perpendicular to the axis of the fastening screw, and the abutment rod is located at the end of the fastening screw; a washer is provided between the abutment rod and the fastening cover; the washer has a round hole and a vertical hole, the round hole matches the fastening screw, and the vertical hole matches the abutment rod.

[0022] By adopting the above technical solution, the gasket is located between the abutment rod and the snap-fit ​​cover of the fastening screw. The gasket serves to pre-tighten and prevent the fastening screw from loosening due to movement or vibration. The vertical and circular holes on the gasket allow it to be inserted between the abutment rod and the snap-fit ​​cover without disassembling the fastening screw. Rotating the gasket so that the vertical hole does not align with the abutment rod allows for proper insertion. After prolonged use, if the gasket's pre-tightening or prevention of loosening due to movement or vibration weakens, the gasket can be replaced without disassembling the fastening screw, facilitating equipment maintenance. The gasket can also increase or decrease local mass. When dynamic balance issues arise, adjusting the local mass can be achieved by adding, removing, or replacing gaskets with different materials. Therefore, it can also adjust the dynamic balance, better regulating the overall mass distribution of the rotating shaft and its components, and controlling the dynamic balance error within a small range. In summary, the insert bar and washer adjustment design not only clamps the cutting tool but also allows for fine-tuning of the overall mass distribution of rotating components by adjusting the insert bar insertion depth, replacing washers of different materials, or increasing or decreasing the number of washers. This function compensates for dynamic balance deviations caused by wear or deformation of parts, ensuring that the equipment maintains stable operation with low vibration and low noise during long-term use, thus extending the life of the spindle system.

[0023] Optionally, a first magnetic element is provided in the slot, and a second magnetic element is provided on the insertion part; the first magnetic element and the second magnetic element are attracted to each other; the attraction between the first magnetic element and the second magnetic element is greater than the weight of the cutter.

[0024] By adopting the above technical solution, the first and second magnetic components are designed to initially fix the insert in the slot after it is inserted. Then, after all the inserts are installed into the slots, the cover is installed. This facilitates installation and increases installation speed.

[0025] Optionally, the fastening cover is provided with an air injection chamber and an exhaust port, the exhaust port is located between any two of the cutting sections, and the exhaust direction of the exhaust port intersects with the rotating axis; the nylon pelletizer also includes an air injection component, which injects air into the air injection chamber.

[0026] By adopting the above technical solution, air is exhausted outward through the exhaust vent. This air, blown between two adjacent cutting sections, removes debris from the cutting sections, ensuring they remain sharp and improving pelletizing efficiency. The integrated airflow system within the locking cover continuously injects gas into the cutting area during the cutting process. This design effectively removes debris and residual particles generated during cutting, preventing accumulated debris from affecting cutting sharpness or causing particle blockage, thus ensuring the stability of continuous production and the cleanliness of the pelleted product.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By using a detachable cutter unit in conjunction with the rotating shaft, the problem of needing to replace the entire traditional one-piece cutter shaft due to partial damage is solved. For example, the detachable connection of the cutting section allows for individual blade replacement. When the quality of the granules decreases due to wear or damage to a single cutting section, there is no need to replace the entire rotating shaft or cutter assembly, greatly reducing spare parts inventory costs and maintenance expenses, and improving the economy and sustainability of the equipment.

[0029] 2. The fastening slot of the fastening component is fastened to the rotating shaft, so that the fastening slot fastens the insert into the slot, thus fixing the cut part to the rotating shaft. When disassembling, it is only necessary to open the fastening component and remove the corresponding cut part, which makes maintenance convenient. The detachable structure is simple and reliable, and saves costs.

[0030] 3. By using the first and second inclined surfaces on the insert, the insert strip is filled in, which makes the insert and the inner wall of the slot more secure and better fixes the cut part and the rotating shaft. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a structural schematic diagram of a part of the embodiment, mainly showing some of the structures inside the main body shell;

[0033] Figure 3 This is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the rotating shaft, the cutting blade and the drive roller;

[0034] Figure 4 This is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the rotating shaft, the cutting blade, and the snap-fit ​​cover;

[0035] Figure 5 This is a structural schematic diagram as part of an embodiment, mainly showing the structure in which the insert and the insertion part are located in the slot;

[0036] Figure 6This is a structural schematic diagram as part of an embodiment, mainly showing an observation from another perspective. Figure 5 The structure;

[0037] Figure 7 This is a structural schematic diagram as part of an embodiment, mainly showing the structure of the insert, the insertion part, and the cutting part;

[0038] Figure 8 This is a structural schematic diagram as part of an embodiment, mainly showing the exploded schematic structure of the fastening screw, abutment rod, insert, and washer;

[0039] Figure 9 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 The structure of disassembling a dust cover;

[0040] Figure 10 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 The structure involves disassembling two dust covers.

[0041] Figure 11 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 One of the cross-sectional structures;

[0042] Figure 12 yes Figure 11 An enlarged schematic diagram of part A in the middle;

[0043] Figure 13 This is a structural schematic diagram of a part of the embodiment, mainly showing... Figure 1 Another sectional view;

[0044] Figure 14 yes Figure 13 Enlarged diagram of part B

[0045] Figure 15 This is a structural schematic diagram as part of an embodiment, mainly showing the cross-sectional structure of the fastening element and the rotating shaft engagement;

[0046] Figure 16 This is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the snap-fit ​​groove and the fastening screw hole;

[0047] Figure 17 This is a structural schematic diagram as part of an embodiment, mainly showing the location structure of the perforation.

[0048] Figure label:

[0049] 1. Main body shell; 11. Perforation;

[0050] 2. Dust cover;

[0051] 3. Support frame;

[0052] 4. Driving component; 41. Transmission structure; 42. Drive roller; 43. Second drive motor; 44. First pulley; 45. Second pulley; 46. Transmission belt;

[0053] 5. Bottom blade; 51. Base;

[0054] 6. Rotating shaft; 61. Slot; 611. First filling groove; 612. Second filling groove; 62. Connecting chamber; 63. Connecting hole;

[0055] 7. Cutting blade; 71. Insertion part; 72. Cutting part; 711. First inclined surface; 712. Second inclined surface; 713. Straight surface;

[0056] 8. Fastening element; 81. Fastening cover; 811. Fastening groove; 812. Elastic pad; 813. Fastening screw hole; 814. Air injection chamber; 815. Vent hole; 82. Insert strip; 83. Fastening screw; 84. Abutment rod; 85. Washer; 851. Round hole; 852. Vertical hole; 86. Bolt;

[0057] 9. Air injection components; 91. Air pump; 92. Air hose. Detailed Implementation

[0058] The following is in conjunction with the appendix Figure 1-17 This application will be described in further detail.

[0059] This application discloses a nylon pelletizer.

[0060] Reference Figure 1 , Figure 3 , Figures 9-10 A nylon pelletizing machine includes an extrusion device and a pelletizing device. A cold water tank is provided between the extrusion device and the pelletizing device, and a cold water trough containing cold water is opened in the cold water tank. The extrusion device is used to extrude strips of nylon. The nylon strip falls into the cold water trough, and then the worker pulls the nylon strip to the pelletizing device. After passing through the cold water trough, the nylon strip is cut by the pelletizing device. The pelletizing device includes a main housing 1 and a first drive motor and drive rollers 42 disposed on the main housing 1. The first drive motor is used to drive the drive rollers 42 to rotate. Two drive rollers 42 are provided. The two drive rollers 42 clamp the nylon strip, and the rotation of the drive rollers 42 feeds the nylon strip, sending it into the pelletizing structure of the pelletizing device for pelletizing. The worker pulling the nylon strip to the drive rollers 42 enables the drive rollers 42 to feed the nylon strip.

[0061] Reference Figures 1-4 The pelletizing device further includes: a drive unit 4, a bottom blade 5, a rotating shaft 6, a cutting blade 7, and a fastening unit 8.

[0062] The bottom blade 5 is fixed to the main body shell 1, and a nylon strip is draped over the bottom blade 5. A rotating shaft 6 has multiple slots 61 in the radial direction, and the height of the axis of the rotating shaft 6 matches the height of the blade edge of the bottom blade 5. The cutting blade 7 has an insertion portion 71 that inserts into the slot 61 and a cutting portion 72 that is fixed to the insertion portion 71. The fastening member 8 has a fastening groove 811, as shown in the attached drawing. Figure 16 The fastening member 8 is disposed at the end of the rotating shaft 6. The groove wall of the fastening groove 811 abuts against the rotating shaft 6 and the insertion part 71, and the fastening groove 811 fastens the insertion part 71 onto the rotating shaft 6, thereby achieving a rotatable and detachable fixation of the insertion part 71 by the fastening member 8. The driving member 4 is used to drive the rotating shaft 6 to rotate, thereby driving the rotating shaft 6 to rotate multiple cutting blades 7. The cutting part 72 on the cutting blade 7 cooperates with the bottom blade 5 to cut the nylon strip into pellets. The cutting part 72 and the bottom blade 5 are 3-5mm apart, so that the cutting part 72 performs the cutting action, while the bottom blade 5 performs the supporting function, so that the cutting part 72 can cut the nylon strip mounted on the bottom blade 5, thereby achieving the cutting of the nylon strip into pellets.

[0063] Due to prolonged use, the cutter component 7 is prone to wear. Wear on the cutter component 7 can make it difficult to cut nylon strips into pellets. If nylon pellets become tail-like or cannot be cut completely, the cutter component 7 will wear further, ultimately affecting the quality and efficiency of nylon production.

[0064] This application, by adopting the above-described technical solution, achieves cutting using the cutter 7 through multiple detachable cutting sections 72. The detachable connection of these cutting sections 72 allows for individual replacement of worn sections 72 without replacing the entire cutter 7, significantly reducing maintenance costs. Furthermore, the fastening groove 811 of the fastening member 8 engages with the rotating shaft 6, securing the insertion section 71 within the slot 61, thus fixing the cutting section 72 to the rotating shaft 6. Disassembly is simple; only the fastening member 8 needs to be opened to remove the corresponding cutting section 72, making maintenance convenient. The detachable structure is simple and reliable, further saving costs and increasing the speed of daily maintenance.

[0065] Reference Figures 1-4 In the specific design, the driving component 4 includes a second drive motor 43, a first pulley 44, a second pulley 45, and a transmission belt 46. The first pulley 44 is connected to the output end of the second drive motor 43, the second pulley 45 is connected to the rotating shaft 6, and the transmission belt 46 is wound between the first pulley 44 and the second pulley 45. Both the first pulley 44 and the second pulley 45 are located outside the main body shell 1. The fastening cover 81 is located on the side of the second pulley 45 closest to the main body shell 1. The assembly and disassembly of the fastening cover 81 refers to the switching between the fastening groove 811 of the fastening cover 81 engaging the insertion part 71 and the rotating shaft 6 and disengaging the insertion part 71 and the rotating shaft 6.

[0066] In the specific design, a first magnetic element is provided in the slot 61, and a second magnetic element is provided on the insertion part 71. The first magnetic element and the second magnetic element attract each other. The attraction between the first magnetic element and the second magnetic element is greater than the weight of the cutter 7. When assembling the cutter 7 onto the rotating shaft 6, the insertion part 71 can be directly inserted into the rotating shaft 6, and multiple insertion parts 71 can be inserted simultaneously. Due to the first and second magnetic elements, the insertion parts 71 will be attracted into the slot 61. Even if the rotating shaft 6 is moved slightly, the insertion parts 71 will not detach from the slot 61. This makes it easier to install multiple cutter parts 7 into the slot 61 first, and then use the fastener 8 to fasten the insertion parts 71 and the rotating shaft 6. The fastener fixing scheme, combined with the magnetic pre-positioning structure, makes the disassembly and assembly process of the cutter extremely simple. Maintenance personnel can quickly complete the cutter replacement without disassembling the entire transmission system, greatly reducing downtime and improving the operating efficiency and equipment availability of the production line. The first magnetic component and the second magnetic component can be permanent magnets. The first magnetic component is disposed on the part or all of the surface of the insertion part 71 that contacts the slot 61, and the second magnetic component is disposed on the part or all of the surface of the slot 61 that contacts the insertion part 71.

[0067] In the specific design, the end of the cutting part 72 forms a cutting line; on a horizontal plane, the cutting line is inclined at 5-15° to the axis of the rotating shaft 6; on a vertical plane, the cutting line is inclined at 3-9° to the axis of the rotating shaft 6. This inclined cutting line configuration allows the cutting part 72 to better cooperate with the bottom blade 5 to cut the nylon strip into granules.

[0068] In some embodiments, the cutting portion 72 is a rigid blade, a heating wire, or a rigid cutting wire, and / or the bottom blade 5 is a rigid conductor, a heating wire, or a rigid cutting wire.

[0069] When the cutting section 72 uses a heating wire, it can thermally cut the nylon strip to achieve pelletizing. When the cutting section 72 uses a rigid cutting wire, it can perform wire cutting on the nylon strip. The structure is simplest and most reliable when the cutting section 72 uses a rigid blade. The bottom blade 5 works in conjunction with the cutting section 72 for pelletizing; the bottom blade 5 can also be a rigid conductor, heating wire, or rigid cutting wire.

[0070] Reference Figures 4-5In a specific embodiment, the length of the rotating shaft 6 is greater than the length of the cutting portion 72, and the length of the insertion portion 71 matches the length of the rotating shaft 6. The fastening member 8 includes a fastening cover 81, which forms a fastening groove 811, the inner groove of which is the inner groove of the fastening cover 81. The end of the fastening cover 81 abuts against the cutting portion 72, and the inner wall of the fastening groove 811 abuts against the outer wall of the rotating shaft 6 and the insertion portion 71 simultaneously. The fastening groove 811 abuts against the cutting portion 72, fixing its position and making the cutting portion 72 more securely fixed on the rotating shaft 6, thus making the pelletizing process more stable and reliable. In some possible implementations, an elastic pad 812 is provided at the end of the fastening cover 81. The fastening cover 81 is used to fix the insertion portion 71 and abut against the cutting portion 72. The design of the elastic pad 812 allows for more adjustment space for the fastening cover 81. Furthermore, the elastic pad 812 pressing against the cut 72 can provide more support for the cut 72, making the cut 72 more stable under the support force. Preferably, after the insert 71 is inserted into the slot 61, the outer wall of the insert 71 and the outer wall of the rotating shaft 6 form a circular line, so that the groove wall of the engaging groove 811 only needs to be circular in shape to achieve the engagement of the insert 71 into the slot 61.

[0071] In this embodiment, the shape of the insert 71 can perfectly match the slot 61. The insert 71 will not wobble after being inserted into the slot 61, thus better securing the cutting part 72 to the rotating shaft 6. This helps ensure the stability of the cutting part 72 and the bottom blade 5 during the pelletizing process. A base 51 is provided on the main body of the outer casing, and the bottom blade 5 is fixed to the base 51. The bottom blade 5 and the base 51 are detachably connected and fixed, and the bottom blade 5 is connected to the base 51 by bolts 86, allowing for disassembly and replacement of the bottom blade 5.

[0072] Reference Figures 5-6In some embodiments, the insertion portion 71 has a first inclined surface 711 and a second inclined surface 712. The first inclined surface 711 is located at one end of the insertion portion 71, and the second inclined surface 712 is located at the other end of the insertion portion 71; that is, both ends of the insertion portion 71 are pointed. A first filling groove 611 is formed between the first inclined surface 711 and the inner wall of the slot 61, and a second filling groove 612 is formed between the second inclined surface 712 and the inner wall of the slot 61; both the first filling groove 611 and the second filling groove 612 are triangular in shape. Two sets of fastening members 8 are provided, respectively located at both ends of the rotating shaft 6. The fastening member 8 also includes a strip 82, one of which fills the space between the first inclined surface 711 and the inner wall of the slot 61, i.e., the first filling groove 611; the other of which fills the space between the second inclined surface 712 and the inner wall of the slot 61, i.e., the second filling groove 612. Both fastening parts 8 are snap-fit ​​covers. The snap-fit ​​covers 81 fasten to both ends of the rotating shaft 6, securing the rotating shaft 6 and the insertion part 71. The special shape of the insertion part 71 allows the insertion strip 82 to be inserted into or filled into the first filling groove 611 and the second filling groove 612. The insertion strip 82 then presses the insertion part 71 tightly within the first and second filling grooves 611 and 612, thus more securely fixing the insertion part 71 to the slot 61. The first and second inclined surfaces 711 and 712 on the insertion part 71 are designed to make it easier to install the insertion part 71 into the slot 61. The insertion strip 82 is designed to securely fix the insertion part 71 to the slot 61, ensuring that even with significant errors between the slot 61 and the insertion part 71, the insertion of the insertion strip 82 can still securely fix the insertion part 71 to the slot 61. The insertion part 71 is more tightly fastened to the inner wall of the slot 61, which better secures the cutting part 72 to the rotating shaft 6.

[0073] Reference Figures 5-7In a preferred embodiment, the insertion part 71 further has a flat surface 713, which is located between the first inclined surface 711 and the second inclined surface 712. The flat surface 713 abuts against the inner wall of the slot 61. Both the first inclined surface 711 and the second inclined surface 712 are connected to the flat surface 713, and the insertion strip 82 is trapezoidal in shape. The flat surface 713 is provided to fix the position of the insertion part 71 in the slot 61, that is, to fix the position of the insertion part 71 and prevent it from shaking. After the insertion part 71 is inserted into the slot 61, when the insertion strip 82 is filled, since the insertion part 71 will not shake and its position is fixed, multiple insertion strips 82 can be accurately filled into multiple slots 61, improving the installation speed. The insert 82 is trapezoidal in shape, while the first filling groove 611 and the second filling groove 612 are triangular in shape. After the insert 82 is filled, it can be filled to different positions to make the insert 71 be tightened to different degrees. Or, when there is an error in the insert 71, the insert 82 can be filled to different positions to improve the fit of the insert 71.

[0074] Reference Figures 13-16 In the specific design, the fastening cover 81 is provided with a fastening screw hole 813, and a fastening screw 83 is provided in the fastening screw hole 813; the fastening screw 83 is rotatably engaged with the insert 82. After the fastening cover 81 is fixed together with the rotating shaft 6, the insert 82 can be tightly filled in the first filling groove 611 and the second filling groove 612 by rotating the fastening screw 83. This facilitates quick adjustment of the insert 82 when wear occurs, ensuring that the insert 71 is stably fixed in the slot 61. Since two sets of fastening members 8 are provided, the insert 82 on one fastening member 8 can be partially pulled out of the first filling groove 611, and the slot 61 on the other fastening member 8 can be partially filled in the second filling groove 612. This also allows for quick adjustment of the insert 82 when wear occurs, ensuring that the insert 71 is stably fixed in the slot 61.

[0075] Reference Figure 8More specifically, an abutment rod 84 is provided on the fastening screw 83, and the abutment rod 84 is fixed to the fastening screw 83. The abutment rod 84 is perpendicular to the axis of the fastening screw 83 and is located at the end of the fastening screw 83. A washer 85 is provided between the abutment rod 84 and the fastening cover 81. The washer 85 has a round hole 851 and a vertical hole 852. The round hole 851 matches the fastening screw 83, and the vertical hole 852 matches the abutment rod 84. Since the washer is located between the abutment rod 84 and the fastening cover 81 of the fastening screw 83, the washer can pre-tighten and prevent the fastening screw 83 from loosening due to movement or vibration. The vertical hole 852 and the round hole 851 on the gasket allow it to be inserted between the abutment rod 84 and the snap-fit ​​cover 81 without disassembling the fastening screw 83. Rotating the gasket disaligns the vertical hole 852 with the abutment rod 84, thus achieving the insertion and installation of the gasket. After prolonged use, if the gasket's pre-tightening function or its ability to prevent the fastening screw 83 from loosening due to movement or vibration weakens, the gasket can be replaced without disassembling the fastening screw 83, facilitating equipment maintenance. The gasket can also increase or decrease local mass. When dynamic balance issues arise, adjusting the local mass can be achieved by adding, removing, or replacing gaskets with different materials. Therefore, it can also adjust the dynamic balance, better regulating the overall mass distribution of the rotating shaft 6 and its components, keeping the dynamic balance error within a small range.

[0076] Wear on the rotating shaft 6 is the cause of dynamic balance problems. With prolonged use, wear or minor bending deformation of the rotating shaft 6 is inevitable, all of which affect dynamic balance. The presence of dynamic balance problems increases noise during the rotation of the rotating shaft 6, and makes it difficult for operators to achieve good pelletizing results across all cutting sections 72 during trial cutting. Therefore, when adjustment is difficult, the entire rotating shaft 6 needs to be replaced. Replacing the rotating shaft 6 increases costs and is time-consuming and labor-intensive, significantly impacting production efficiency. This application utilizes shims to adjust the overall mass distribution of the rotating shaft 6 and its components, controlling the dynamic balance error within a small range. Even if the rotating shaft 6 wears or deforms, it can maintain normal operation within a certain wear or deformation range, extending its service life and improving production efficiency and quality.

[0077] Reference Figures 1-2 , Figures 9-10 , Figure 16In other embodiments, the fastening cover 81 is provided with an air injection chamber 814 and an exhaust port 815. The exhaust port 815 is located between any two cutting sections 72, and the exhaust direction of the exhaust port 815 intersects with the rotating shaft 6. The nylon pelletizer also includes an air injection component 9, which injects air into the air injection chamber 814. By using the exhaust port 815 to expel air outward, the air blown between two adjacent cutting sections 72 can blow off the waste on the cutting sections 72, better ensuring that the cutting sections 72 are in a sharp cutting state, which is beneficial to improving the pelletizing effect. At the same time, when the rotating shaft 6 rotates at a high speed, the cut nylon pellets will rotate with the rotating shaft 6 and the cutting sections 72 due to the inertia of the rotating shaft 6 and the cutting sections 72, and will not be able to escape from the space between the two cutting sections 72, which will affect the next pelletizing. Therefore, the expulsion of air, blowing the nylon pellets outward, can also help the nylon pellets escape from the space between the two cutting sections 72, ensuring the pelletizing effect.

[0078] The air injection component 9 includes an air pump 91, an air pipe 92, and a rotary connector. A connecting chamber 62 and a connecting hole 63 are formed at the end of the rotating shaft 6, with the connecting hole 63 connecting the connecting chamber 62 to the air injection chamber 814. The air pipe 92 is connected to the rotating shaft 6 via the rotary connector and is also connected to the connecting chamber 62. The air pump 91 injects external air into the air injection chamber 814 through the air pipe 92. Two sets of air injection components 9 can be provided, located at both ends of the rotating shaft 6. This allows air to be blown onto the cutting section 72 simultaneously from both ends of the rotating shaft 6, which is more conducive to cleaning waste and removing nylon particles from the space between the two cutting sections 72.

[0079] Reference Figures 9-10 In some other preferred embodiments, the first drive motor is replaced by a transmission structure 41, which is connected to the rotating shaft 6. The transmission structure 41 distributes the power from the rotating shaft 6 to the drive roller 42, thereby rotating the drive roller 42. The transmission structure 41 uses gear transmission. The nylon pelletizer may also include a dust cover 2, which is located on the side of the main body shell 1 and covers the second pulley 45 and part of the transmission belt 46. Two dust covers 2 can also be provided to simultaneously cover the second pulley 45, part of the transmission belt 46, and the transmission structure 41. A support frame 3 is provided inside or outside the dust cover 2, fixed to the main body shell 1, and the rotating shaft 6 is rotatably connected to the support frame 3. A through hole 11 is provided on the main body shell 1, with the through hole 11 referring to... Figure 17 The snap-fit ​​cover 81 passes through the through hole 11, and the snap-fit ​​cover 81 and the through hole 11 do not contact each other, or are either in a transition fit or a clearance fit. Therefore, during subsequent maintenance, only the dust cover 2 needs to be removed, and then the snap-fit ​​cover 81 is directly exposed, which makes it easy to rotate the fastening screw 83 on the snap-fit ​​cover 81 without disassembling the snap-fit ​​cover 81 or the rotating shaft 6.

[0080] The radii of the gears in the transmission structure 41 and the second pulley 45 are both smaller than the distance from the fastening screw 83 to the axis of the rotating shaft 6, so there will be no interference when the fastening screw 83 is adjusted or rotated.

[0081] The snap-fit ​​cover 81 is fixed to the rotating shaft 6 by bolts 86. Bolt 86 is referenced. Figure 15-16 .

[0082] In summary, the nylon pelletizer provided in this application, through its multiple fixing mechanisms including a detachable cutting section 72, the attraction of the first and second magnetic components, the filling of the insert strip 82, and the fastening screw, as well as its dynamic balance adjustability and integrated air-blowing cleaning design, comprehensively achieves multiple benefits such as reduced maintenance costs, improved ease of operation, optimized cutting quality, and enhanced long-term operational stability, significantly improving the overall performance and market competitiveness of the nylon pelletizing equipment.

[0083] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nylon sliver cutting machine, comprising: an extruding device for extruding a strip of nylon sliver; a sliver cutting device for cutting the nylon sliver after passing through a water tank; characterized in that: the sliver cutting device comprises: a bottom knife on which the nylon sliver is placed; a rotating shaft with a plurality of slots in the radial direction; a cutting member with an insertion part inserted into the slot and a cutting part fixed to the insertion part; a fastening member with a fastening slot, the fastening member is arranged at the end of the rotating shaft, the slot wall of the fastening slot abuts against the rotating shaft and the insertion part; a driving member for driving the rotating shaft to rotate so that the cutting part cuts the nylon sliver with the bottom knife; the insertion part has a first inclined surface and a second inclined surface, the first inclined surface is located at one end of the insertion part, and the second inclined surface is located at the other end of the insertion part; the fastening member is arranged in two groups, respectively at both ends of the rotating shaft; the fastening member further comprises an insertion strip, the insertion strip of one of the fastening members is filled between the first inclined surface and the inner wall of the slot, and the insertion strip of the other fastening member is filled between the second inclined surface and the inner wall of the slot.

2. The nylon sliver cutting machine according to claim 1, characterized in that: the end of the cutting part forms a cutting line; in a horizontal plane, the cutting line is inclined to the axis of the rotating shaft by 5-15°; in a vertical plane, the cutting line is inclined to the axis of the rotating shaft by 3-9°.

3. The nylon chipper of claim 1, wherein: the cutting part is a rigid cutter or an electric heating wire or a rigid cutting wire, and / or the bottom knife is a rigid conductor or an electric heating wire or a rigid cutting wire.

4. The nylon chipper of claim 1, wherein: the length of the rotating shaft is greater than the length of the cutting part, and the length of the insertion part matches the length of the rotating shaft; the fastening member comprises a fastening cover, the fastening cover forms the fastening slot, and the fastening slot is an inner slot of the fastening cover; the end of the fastening cover abuts against the cutting part, and the inner wall of the fastening slot abuts against the outer wall of the rotating shaft and the insertion part at the same time.

5. The nylon chipper of claim 1, wherein: the insertion part further has a flat surface between the first inclined surface and the second inclined surface; the flat surface abuts against the inner wall of the slot, and the first inclined surface and the second inclined surface both connect with the flat surface, the first inclined surface and the inner wall of the slot form a first filling slot, and the second inclined surface and the inner wall of the slot form a second filling slot; the first filling slot and the second filling slot are both triangular, and the insertion strip is trapezoidal.

6. The nylon sliver cutting machine according to claim 4, characterized in that: a fastening screw hole is arranged on the fastening cover, a fastening screw is arranged in the fastening screw hole, and the fastening screw is rotationally matched with the insertion strip.

7. The nylon chipper of claim 6, wherein: an abutting rod is arranged on the fastening screw, the abutting rod is perpendicular to the axis of the fastening screw, and the abutting rod is located at the end of the fastening screw; a gasket is arranged between the abutting rod and the fastening cover, the gasket has a circular hole matched with the fastening screw and a vertical hole matched with the abutting rod.

8. The nylon sliver cutting machine according to any one of claims 1-7, characterized in that: a first magnetic member is arranged in the slot, and a second magnetic member is arranged on the insertion part; the first magnetic member and the second magnetic member are attracted to each other; the attraction force between the first magnetic member and the second magnetic member is greater than the gravity of the cutting member.

9. The nylon chipper of claim 4 wherein: The buckle cover is provided with an air injection chamber and an air exhaust hole, the air exhaust hole is arranged between any two cutting parts, and the air exhaust direction of the air exhaust hole intersects with the rotation axis; The nylon cutting machine further comprises an air injection member, and the air injection member injects air into the air injection chamber.

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