A pellet cutter

Abstract

This invention relates to the field of pelletizing equipment technology, specifically disclosing a pelletizer, comprising: a base, a pelletizing box disposed on the base, a feeding roller assembly disposed inside the pelletizing box, and an installation roller disposed inside the pelletizing box, on which multiple cutting blade assemblies are disposed; the installation roller has a coaxially arranged inner cavity inside, and its side wall has multiple radial grooves communicating with the inner cavity, the cutting blade assemblies being slidably disposed in the radial grooves; a drive disk capable of axial movement and rotation is disposed in the inner cavity, the drive disk being drively connected to the cutting blade assemblies; the pelletizer of this invention, through simple rotation operation, can steplessly adjust the pelletizing length without stopping the machine or only briefly stopping it, quickly adapting to the production needs of different specifications of products, significantly improving equipment utilization and production flexibility, using a lead screw as the main pushing mechanism, with precise transmission and good self-locking performance, effectively preventing the spontaneous change of the cutter head position under vibration conditions, ensuring stable pellet size.

Description

Technical Field

[0001] This invention relates to the field of pelletizing equipment technology, and more specifically to a pelletizer. Background Technology

[0002] A pelletizer, also known as a pelletizing system, is a key piece of equipment in the field of plastics processing and engineering technology. Its main function is to cut long, round, or directly extruded molten materials into pellets that are easy to package, transport, and reprocess.

[0003] A multi-channel rapid plastic pelletizer is disclosed in patent document CN118238305B, comprising a frame, on which are: a support ring movably mounted; a cutting roller including a mounting roller rotatably mounted on the support ring, on which cutting blades are movably arranged in a circumferential array; a support roller rotatably mounted on the frame and cooperating with the cutting roller to cut the material; and a connecting shaft movably mounted on the mounting roller, wherein: the connecting shaft rotates to move the cutting blades relative to the mounting roller, and drives the support ring to move so that the cutting blades are in contact with the mounting roller. The support roller maintains a predetermined distance. During the production of plastic granules, the cutting roller and the support roller rotate synchronously. The cutting blade on the cutting roller cooperates with the support roller to cut plastic strips into plastic granules. When it is necessary to change the length of the cut plastic granules, the connecting shaft is manually rotated. The connecting shaft drives multiple cutting blades to move relative to the mounting roller, changing the distance between the ends of the cutting blades and the axis of the mounting roller. This changes the distance between the ends of two adjacent cutting blades, thereby changing the length of the plastic strips cut by the cutting roller. At the same time, the connecting shaft drives the cutting roller to move vertically through the support ring, so that the ends of the cutting blades always maintain a predetermined distance from the support roller.

[0004] However, this solution still has the following problems when in use: the connecting shaft does not have a self-locking function. After the adjustment is completed and the handwheel is pulled back, the connecting shaft and its drive disc are in a "free state" mechanically. In the vibration generated by the operation of the pelletizer, the connecting shaft will inevitably rotate easily. The arbitrary rotation of the connecting shaft will directly cause the radial position of all the cutting blades to change, thereby dynamically changing the pellet length, resulting in inconsistent plastic pellet size, or even becoming waste. Summary of the Invention

[0005] This invention provides a pelletizer that aims to solve the problem in related technologies where the connecting shaft does not have a self-locking function, and the connecting shaft is prone to rotation during the vibration generated during pelletizer operation, dynamically changing the pellet length and resulting in inconsistent plastic pellet sizes.

[0006] The pelletizer of the present invention includes a base, a pelletizing box disposed on the base, a feeding roller assembly disposed inside the pelletizing box, an installation roller disposed inside the pelletizing box, and a plurality of cutting blade assemblies disposed on the installation roller;

[0007] The mounting roller has an inner cavity coaxially arranged inside, and its side wall has multiple radial grooves that communicate with the inner cavity. The cutter assembly is slidably arranged in the radial grooves.

[0008] The inner cavity is equipped with a drive disk that can move and rotate axially. The drive disk is connected to the cutter assembly for transmission, so as to drive the cutter assembly to move radially when rotating, thereby adjusting the spacing between adjacent cutter assemblies.

[0009] The inner cavity is coaxially provided with a central shaft and a sleeve sleeved on the central shaft. The drive disk is fixed on the sleeve. The central shaft is provided with a straight groove and a spiral groove that communicate with each other. The sleeve is provided with a protrusion that cooperates with the spiral groove and the straight groove.

[0010] An axial pusher is also provided inside the cavity for driving the axial movement of the sleeve.

[0011] When the protrusion moves along the spiral groove, the sleeve drives the drive disk to rotate to adjust the spacing of the cutter assembly; when the protrusion enters the straight groove, the sleeve drives the drive disk to move axially to perform an unlocking operation on the cutter assembly.

[0012] Preferably, the cutter assembly includes a base slidably disposed in a radial groove and a cutter head detachably mounted on the base, with the drive disk being drively connected to the base.

[0013] Preferably, a connecting rod is connected to the side of the base near the inner cavity, and an inclined groove is provided on the drive disk, with the end of the connecting rod located in the inclined groove; when the drive disk rotates, the base is driven to slide radially through the cooperation of the inclined groove and the connecting rod.

[0014] Preferably, the bottom of the cutter head is provided with an insert plate, the base is provided with a slot for inserting the insert plate, and the insert plate is fixed with an insert rod having a positioning hole, so as to lock the cutter head and the base.

[0015] Preferably, the cutter assembly further includes a positioning seat slidably disposed on the base, and the positioning seat is provided with a positioning rod inserted into a positioning hole;

[0016] When the drive disc moves axially in the straight groove section, it can cause the positioning seat to slide and drive the positioning rod to disengage from the positioning hole.

[0017] Preferably, the slot is equipped with a magnet, and the insert plate is made of magnetic metal material so that the insert plate and the magnet can be attracted to each other, so that the blade will not fall off by gravity after unlocking, effectively improving the convenience and safety of equipment maintenance.

[0018] Preferably, the axial pushing component includes a push ring, a push rod, and a lead screw. The push ring is sleeved outside the central shaft and threadedly engaged with the lead screw. The lead screw is rotatably supported at both ends, and the push rod is connected between the push ring and the sleeve.

[0019] Preferably, there are two lead screws, and a scale rod extending to the outside of the pelletizing box is fixed on the push ring, which allows for a direct external view of the adjustment of the cutter head, making the adjustment faster and more accurate.

[0020] Preferably, the end of the mounting roller is coaxially fixed with a connecting seat rotatably assembled inside the pelletizing box, the scale rod is slidably assembled inside the connecting seat, and the end of the lead screw is fixedly installed with a knob located outside the connecting seat.

[0021] Preferably, the feeding roller assembly includes an upper roller, a lower roller, and a support plate located between the lower roller and the mounting roller. The support plate is slidably mounted on the pelletizing box, and the pelletizing box is threaded with fastening bolts adapted to the support plate.

[0022] Beneficial effects:

[0023] 1. When using this invention, the cutting length can be steplessly adjusted without stopping the machine or only pausing it briefly through a simple rotation operation, which can quickly adapt to the production needs of different specifications of products, significantly improve equipment utilization and production flexibility. The use of a lead screw as the main pushing mechanism ensures precise transmission and good self-locking performance, which can effectively prevent the cutter head position from changing spontaneously under vibration conditions and ensure stable cutting size.

[0024] 2. In use, the unique built-in linkage unlocking mechanism of this invention eliminates the need to disassemble complex components when replacing the cutter head. The entire process of "extend-position-unlock" can be completed simply by rotating the same set of lead screws, significantly reducing maintenance difficulty and time. Furthermore, when the cutter head is locked, the rigid fixation between the positioning rod and the insertion rod ensures both convenient installation and removal of the cutter head and the stability of the connection between the cutter head and the base, preventing the cutter head from loosening within the base due to vibration. In addition, with the assistance of magnetic fixation, the cutter head will not fall off due to gravity after unlocking, effectively improving the convenience and safety of equipment maintenance.

[0025] 3. In use, the double lead screw design of this invention further enhances the balance and anti-eccentric load capacity of the push ring movement. The double lead screws can counterbalance each other, further reducing the possibility of the push ring moving during vibration and improving the stability of the cutter head during equipment use. At the same time, the external scale rod realizes external visualization and precise control of the adjustment amount, which is convenient for operation and makes the adjustment of the cutter head more accurate and stable. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention.

[0027] Figure 2 This is a front view of the present invention.

[0028] Figure 3 This is a cross-sectional view of the pelletizing box of the present invention.

[0029] Figure 4 This is the present invention. Figure 3 A magnified structural diagram of point A in the middle.

[0030] Figure 5 This is a perspective view of the mounting roller of the present invention.

[0031] Figure 6 This is a cross-sectional view of the mounting roller of the present invention.

[0032] Figure 7 This is a perspective view of the drive disc and push ring of the present invention.

[0033] Figure 8 This is the present invention. Figure 7 Side view.

[0034] Figure 9 This is a perspective view of the drive disk and cutter assembly of the present invention.

[0035] Figure 10 This is the present invention. Figure 9 The front view.

[0036] Figure 11 This is a perspective view of the positioning base of the present invention.

[0037] Figure 12 This is a perspective view of the blade of the present invention.

[0038] Figure 13 This is a top view of the base of the present invention.

[0039] Figure label:

[0040] 10. Base; 11. Discharge pipe; 20. Pelletizing box; 21. Feed inlet; 22. Guide roller; 23. Fastening bolt; 30. Feed roller assembly; 31. Upper roller; 32. Lower roller; 33. Bearing plate; 40. Mounting roller; 41. Connecting seat; 42. Inner cavity; 43. Radial groove; 50. Cutter assembly; 51. Base; 511. Slot; 512. Insertion hole; 513. Slide groove; 514. Magnet; 52. Cutter head; 521. Insert plate; 522. Insert rod; 523. Positioning hole; 53. Positioning seat; 531. Slider; 532. Positioning rod; 60. Radial drive component; 61. Drive disc; 611. Inclined groove; 62. Connecting rod; 70. Guide mechanism; 71. Central shaft; 711. Straight groove; 712. Spiral groove; 72. Sleeve; 721. Protrusion; 722. Annular groove; 80. Axial push component; 81. Push ring; 811. Scale rod; 82. Push rod; 83. Lead screw. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] like Figures 1 to 13 As shown, the pelletizer of the present invention includes a base 10, a pelletizing box 20, a feeding roller assembly 30, a mounting roller 40, a cutter assembly 50, a radial drive 60, a guide mechanism 70, and an axial pusher 80. The pelletizing box 20 is disposed on the base 10. The feeding roller assembly 30 and the mounting roller 40 are disposed inside the pelletizing box 20, and the end of the mounting roller 40 is provided with a drive box for driving it to rotate inside the pelletizing box 20. Multiple cutter assemblies 50 are disposed on the mounting roller 40 and can be driven by the feeding roller 30. The feed roller assembly 30 feeds the feed strip into the pelletizing box 20. The mounting roller 40 drives the cutter assembly 50 to rotate and cut the feed strip into pellets. The radial drive 60, the guide mechanism 70, and the axial pusher 80 are all located inside the mounting roller 40. The axial pusher 80 can push the guide mechanism 70 to move, which in turn drives the radial drive 60 to operate, causing the cutter assembly 50 to move axially within the mounting roller 40. This adjusts the distance between adjacent cutter assemblies 50 and thus adjusts the pellet length.

[0043] The base 10 is provided with a discharge pipe 11 that is connected to the pelletizing box 20.

[0044] refer to Figure 1 , Figure 2 as well as Figure 3 The pelletizing box 20 has a feed inlet 21 on its side wall. A guide roller 22 is rotatably mounted inside the feed inlet 21. The feed strip is introduced into the pelletizing box 20 through the feed inlet 21 for pelleting. The guide roller 22 can guide the incoming feed strip and reduce the friction loss of the feed strip when it enters the pelletizing box 20.

[0045] refer to Figure 2 and Figure 3The feeding roller assembly 30 includes an upper roller 31, a lower roller 32, and a support plate 33. The upper roller 31 and the lower roller 32 are rotatably mounted inside the pelletizing box 20, and a drive box is provided between the upper roller 31 and the lower roller 32 to drive the upper roller 31 and the lower roller 32 to rotate in opposite directions to convey the material strips. The support plate 33 is disposed between the lower roller 32 and the mounting roller 40 to receive the material strips and cooperate with the cutter assembly 50 to complete the pelletizing of the material strips. The support plate 33 is slidably mounted on the pelletizing box 20. Sliding on the pelletizing box 20 allows adjustment of the distance between the support plate 33 and the mounting roller 40, ensuring a suitable distance between the support plate 33 and the radially moved cutter assembly 50 for pelletizing the material strip. The pelletizing box 20 is threaded with fastening bolts 23 that are compatible with the support plate 33. By screwing the fastening bolts 23 into the pelletizing box 20, the end of the bolts presses against the support plate 33, thereby fixing the position of the support plate 33 and preventing it from sliding further, thus ensuring the stability of the equipment during pelletizing.

[0046] refer to Figure 3 , Figure 5 as well as Figure 6 The end of the mounting roller 40 is coaxially fixed with a connecting seat 41, and the connecting seat 41 is rotatably assembled in the pelletizing box 20. The interior of the mounting roller 40 is coaxially provided with an inner cavity 42. Multiple radial grooves 43 communicating with the inner cavity 42 are provided on the side wall of the mounting roller 40, and the multiple radial grooves 43 are evenly distributed in a ring along the circumference of the mounting roller 40. Multiple cutter assemblies 50 are respectively arranged in the multiple radial grooves 43 and can slide radially relative to the mounting roller 40 along the radial grooves 43.

[0047] refer to Figure 4 , Figure 5 as well as Figure 6 The cutter assembly 50 includes a base 51 and a cutter head 52. The base 51 is slidably mounted inside the radial groove 43. The cutter head 52 is disposed on the base 51, and the top end of the cutter head 52 extends to the outside of the mounting roller 40. By sliding the base 51 in the radial groove 43, the extension length of the cutter head 52 in the mounting roller 40 can be adjusted, thereby adjusting the distance between adjacent cutter heads 52 and changing the cutting length of the material strip.

[0048] refer to Figure 6 , Figure 9 , Figure 10 , Figure 12 as well as Figure 13A slot 511 is provided on the outer side of the base 51 (i.e., the side away from the inner cavity 42). An insertion hole 512 is provided inside the slot 511, penetrating the base 51. A plate 521 is fixedly installed at the bottom of the cutter head 52 and inserted into the slot 511. A rod 522 is fixedly installed on the plate 521 and inserted into the insertion hole 512. The bottom end of the rod 522 extends into the inner cavity 42. By inserting the plate 521 into the slot 511 and the rod 522 into the insertion hole 512, the base 51 and the cutter head 52 are detachably connected, so that the cutter head 52 can be pulled out from the inside of the base 51 for easy replacement and maintenance of the cutter head 52.

[0049] refer to Figure 9 , Figure 11 , Figure 12 as well as Figure 13 The base 51 is provided with a positioning seat 53 located in the inner cavity 42. A positioning rod 532 is horizontally fixed on the side wall of the positioning seat 53. The insertion rod 522 is provided with a positioning hole 523 that is adapted to the positioning rod 532. The positioning rod 532 is inserted into the inside of the positioning hole 523, and its end extends through and to the outside of the positioning hole 523. By inserting the positioning rod 532 into the positioning hole 523, the insertion rod 522 is limited and fixed to the inside of the insertion hole 512, so that the insertion rod 522 cannot be removed from the insertion hole 512 and the insertion plate 521 cannot be removed from the slot 511. Therefore, the cutter head 52 is fixed on the base 51, ensuring the stability of the cutter head 52 during the pelletizing process.

[0050] refer to Figure 6 , Figure 9 , Figure 11 as well as Figure 13 The inner side of the base 51 (i.e. the side near the inner cavity 42) is provided with a sliding groove 513 along its length. A slider 531 is fixedly installed on the positioning seat 53, and the slider 531 is slidably assembled in the sliding groove 513. By sliding the slider 531 in the sliding groove 513, the positioning seat 53 can slide on the base 51, so that the positioning seat 53 moves away from the insertion rod 522 during the sliding, so that the positioning rod 532 can be pulled out from the positioning hole 523, thereby releasing the fixing of the positioning rod 532 to the insertion rod 522, so that the cutter head 52 can be pulled out from the base 51.

[0051] refer to Figure 13 A magnet 514 is fixedly installed inside the slot 511. The insert plate 521 is made of a magnetic metal that can attract the magnet 514, such as iron, nickel, cobalt and their alloys. After the insert plate 521 is inserted into the slot 511, it can attract the magnet 514, so that the base 51 applies an attraction force to the cutter head 52. After the positioning rod 532 is released from fixing the insert rod 522, the cutter head 52 will not automatically detach from the base 51 due to its own gravity when it is not subjected to external force, thereby improving the convenience of disassembling and replacing the cutter head 52.

[0052] refer to Figure 3 , Figure 7 , Figure 8 , Figure 9 as well as Figure 10 The radial drive component 60 includes a drive disk 61 and a connecting rod 62. The drive disk 61 is coaxially disposed inside the inner cavity 42 and can move and rotate axially within the inner cavity 42. The drive disk 61 has a slanted groove 611. The connecting rod 62 is transversely disposed in the slanted groove 611, and the two ends of the connecting rod 62 are respectively fixed to the two ends of the inner side of the base 51. When the drive disk 61 rotates, the slanted groove 611 pushes the connecting rod 62 to drive the base 51 to slide in the radial groove 43, thereby adjusting the extension length of the cutter head 52 in the mounting roller 40 and changing the distance between adjacent cutter heads 52. There are multiple slanted grooves 611 and connecting rods 62, which are evenly distributed in a ring along the circumference of the drive disk 61 and correspond one-to-one with multiple bases 51.

[0053] The positioning seat 53 consists of a horizontal plate and two vertical plates. The slider 531 is fixedly installed on the horizontal plate of the positioning seat 53. The two vertical plates are located on both sides of the drive disk 61 and are fixed to the horizontal plate. The positioning rod 532 is fixedly installed on the vertical plate of the positioning seat 53, so that when the drive disk 61 moves axially in the inner cavity 42, it can push the vertical plate to make the positioning seat 53 move synchronously.

[0054] refer to Figure 3 , Figure 6 as well as Figure 8 The guide mechanism 70 includes a central shaft 71 and a sleeve 72. The central shaft 71 is coaxially fixed inside the inner cavity 42, and the sleeve 72 is sleeved on the central shaft 71. The drive disk 61 is coaxially fixed outside the sleeve 72. The sleeve 72 can move axially outside the central shaft 71 and rotate relative to the central shaft 71 during the movement, thereby driving the drive disk 61 to rotate, so that the base 51 moves radially and the extension length of the cutter head 52 is adjusted.

[0055] The central shaft 71 has a straight groove 711 and a spiral groove 712 that are interconnected. A protrusion 721, which is slidably disposed within the spiral groove 712, is fixed inside the sleeve 72. When the sleeve 72 drives the drive disc 61 to move axially outside the central shaft 71, the movement of the protrusion 721 within the spiral groove 712 causes the sleeve 72 to gradually rotate outside the central shaft 71, thereby causing the cutter head 52 to gradually extend. When the protrusion 721 moves from the spiral groove 712 into the straight groove 711, the sleeve 72 and the drive disc 61 stop rotating and only move axially. At this moment, the extension of the cutter head 52 reaches its maximum. As the protrusion 721 continues along the straight groove 711... The drive disc 61 can continuously move the positioning seat 53, thereby causing the positioning rod 532 to disengage from the positioning hole 523 in the insert rod 522, releasing the positioning of the insert rod 522. The user can then pull the cutter head 52 out of the base 51 for replacement and maintenance. The length of the positioning rod 532 extending through the positioning hole 523 is greater than the length of the spiral groove 712, ensuring that the positioning rod 532 will not disengage from the positioning hole 523 when the protrusion 721 moves within the spiral groove 712. This ensures that the positioning rod 532 remains fixed to the insert rod 522 during the adjustment of the cutter head 52's extension length, thus ensuring the locking effect of the cutter head 52.

[0056] refer to Figure 6 and Figure 7 The axial pushing component 80 includes a push ring 81, a push rod 82, and a lead screw 83. The push ring 81 is sleeved on the outside of the central shaft 71. The push rod 82 is laterally fixed to the side wall of the push ring 81, and the end of the push rod 82 away from the push ring 81 is set on the sleeve 72. There are at least two lead screws 83, and both lead screws 83 are threadedly connected to the push ring 81. The two ends of the lead screw 83 are respectively rotatably mounted on the central shaft 71 and the connecting seat 41. By rotating the lead screw 83, the push ring 81 is driven to move axially outside the central shaft 71, so that the push rod 82 pushes the sleeve 72 to move outside the central shaft 71, thereby adjusting the cutter assembly 50. The lead screw 83 and the push ring... The threaded design between 81 has a self-locking function, which effectively prevents the drive disc 61 from moving and rotating randomly during equipment vibration, thus avoiding instability and arbitrary extension and retraction of the cutter head 52 during pellet cutting. The two lead screws 83 can counterbalance each other, and only when the two lead screws 83 rotate simultaneously can they push the push ring 81 to move and complete the adjustment of the cutter assembly 50, further improving the stability of the cutter head 52 during equipment use. The end of the sleeve 72 is provided with an annular groove 722, and the end of the push rod 82 is slidably fitted inside the annular groove 722, so that while the push rod 82 drives the sleeve 72 to move, the sleeve 72 can rotate relative to the push rod 82.

[0057] A knob is fixedly installed at the end of the lead screw 83 outside the connecting seat 41, so that the user can directly rotate the lead screw 83 to adjust the cutter assembly 50. A scale rod 811 is fixedly installed on the push ring 81 and slides inside the connecting seat 41. The scale rod 811 extends to the outside of the pelletizing box 20. As the push ring 81 moves, the scale rod 811 can slide inside the connecting seat 41. The distance that the push ring 81 drives the sleeve 72 to move can be accurately judged according to the length of the scale rod 811 outside the pelletizing box 20. Then, the extension of the cutter head 52 can be intuitively understood from the outside of the equipment, and the pelletizing length of the equipment can be accurately adjusted.

[0058] Working principle: The material strip is fed into the pelletizing box 20 through the feed port 21 and is held and pulled by the guide roller 22 and the feeding roller group 30. The mounting roller 40 is driven to rotate by the drive box, so that the cutter head 52 cooperates with the bearing plate 33 to cut the continuously fed material strip into pellets, which are then discharged through the discharge pipe 11.

[0059] When adjusting the cutter head 52, rotate the two lead screws 83 outside the connecting seat 41, causing the lead screws 83 to drive the push ring 81 to move axially along the central shaft 71. The push ring 81 pushes the sleeve 72 to move axially synchronously through the push rod 82. The protrusion 721 inside the sleeve 72 slides in the spiral groove 712 of the central shaft 71, forcing the sleeve 72 to rotate along with its external drive disc 61 while moving axially. The inclined groove 611 on the drive disc 61 cooperates with the connecting rod 62 of the connecting base 51 to convert the rotational motion of the drive disc 61 into the radial linear motion of the connecting rod 62 and the base 51. All the bases 51 slide radially synchronously in their respective radial grooves 43, thereby changing the length of the cutter head 52 extending out of the mounting roller 40, realizing the adjustment of the distance between adjacent cutter heads 52, changing the cutting length, and the scale rod 811 moves with the push ring 81, so that the adjustment amount can be read intuitively from the outside.

[0060] When a tool change is needed, continue rotating the lead screw 83 in the same direction to push the sleeve 72 and drive disc 61 to move further axially. When the protrusion 721 moves from the spiral groove 712 to the straight groove 711, the sleeve 72 and drive disc 61 stop rotating and only move axially. At this time, the tool head 52 is in the maximum extended position and locked. The drive disc 61 continues to move forward, and its disc body directly pushes the vertical plate of the positioning seat 53, so that the entire positioning seat 53 slides in the slide groove 513 of the base 51, thereby pulling the positioning rod 532 out of the positioning hole 523 of the tool head 52 insert rod 522 to release the positioning. The tool head 52 is held only by the attraction force between the insert plate 521 and the magnet 514. The user can easily overcome the magnetic force to pull out the tool head 52 for replacement. When installing a new cutter head 52, after insertion, the lead screw 83 is rotated in the opposite direction, and each mechanism operates in the opposite order. Finally, the drive disc 61 is rotated in the opposite direction to reset, and the positioning rod 532 is reinserted into the positioning hole 523 of the new cutter head 52 through the positioning seat 53, thus completing the automatic locking.

[0061] This invention allows for stepless adjustment of the pellet length through a simple rotational operation, enabling continuous operation or only short-term pauses, quickly adapting to the production needs of different product specifications and significantly improving equipment utilization and production flexibility. The use of a lead screw 83 as the main actuation mechanism ensures precise transmission and good self-locking performance, effectively preventing spontaneous changes in the cutter head 52 position under vibration conditions and guaranteeing stable pellet size. The double lead screw 83 design further enhances the balance and anti-eccentric load capacity of the push ring 81. The external scale rod 811 enables external visualization and precise control of the adjustment amount, facilitating operation and making the adjustment of the cutter head 52 more convenient. Precise and stable; the unique built-in linkage unlocking mechanism allows for the replacement of the cutter head 52 without disassembling complex components. The entire process of "extending-positioning-unlocking" can be completed simply by rotating the same set of lead screws 83, greatly reducing maintenance difficulty and time. With the assistance of magnetic attraction for fixation, the cutter head 52 will not fall off due to gravity after unlocking, effectively improving the convenience and safety of equipment maintenance. Furthermore, all adjustment mechanisms such as drive, guide, and push are integrated into the inner cavity 42 of the mounting roller 40, resulting in a compact structure that saves space. Protected by the outer shell, it is not easily contaminated or interfered with by external materials, making the equipment reliable and extending its service life.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dicing machine comprising a base (10) on which a dicing box (20) is arranged, and a feeding roller group (30) is arranged in the dicing box (20), characterized in that, The pelletizing box (20) is also equipped with an installation roller (40), and multiple cutter assemblies (50) are provided on the installation roller (40); The mounting roller (40) has an inner cavity (42) coaxially arranged inside, and its side wall has multiple radial grooves (43) communicating with the inner cavity (42). The cutter assembly (50) is slidably arranged in the radial grooves (43). The inner cavity (42) is provided with a drive disk (61) that can move axially and rotate. The drive disk (61) is connected to the cutter assembly (50) in a transmission connection so as to drive the cutter assembly (50) to move radially when rotating, thereby adjusting the spacing between adjacent cutter assemblies (50). The cutter assembly (50) includes a base (51) slidably disposed in a radial groove (43) and a cutter head (52) detachably mounted on the base (51), and a drive disk (61) is connected to the base (51) in a transmission manner. The base (51) is connected to a connecting rod (62) on the side near the inner cavity (42). The drive disk (61) is provided with a slanted groove (611), and the end of the connecting rod (62) is located in the slanted groove (611). When the drive disk (61) rotates, the base (51) is driven to slide radially through the cooperation of the slanted groove (611) and the connecting rod (62). A central shaft (71) and a sleeve (72) sleeved on the central shaft (71) are coaxially arranged in the inner cavity (42). The drive disk (61) is fixed on the sleeve (72). A straight groove (711) and a spiral groove (712) that communicate with each other are opened on the central shaft (71). A protrusion (721) that cooperates with the spiral groove (712) and the straight groove (711) is provided in the sleeve (72). An axial pusher (80) for driving the sleeve (72) to move axially is also provided inside the inner cavity (42); When the protrusion (721) moves along the spiral groove (712), the sleeve (72) drives the drive disk (61) to rotate to adjust the spacing of the cutter assembly (50); when the protrusion (721) enters the straight groove (711), the sleeve (72) drives the drive disk (61) to move axially to perform an unlocking operation on the cutter assembly (50).

2. The dicer of claim 1, wherein The blade (52) has an insert plate (521) at the bottom and a slot (511) for inserting the insert plate (521). The insert plate (521) has a rod (522) with a positioning hole (523) fixed on it.

3. The dicer of claim 2, wherein, The cutter assembly (50) also includes a positioning seat (53) slidably disposed on the base (51), and the positioning seat (53) is provided with a positioning rod (532) inserted into the positioning hole (523). When the drive disc (61) moves axially in the straight groove (711) section, the positioning seat (53) can slide and drive the positioning rod (532) to disengage from the positioning hole (523).

4. The pelletizer according to claim 3, characterized in that, The slot (511) contains a magnet (514), and the insert plate (521) is made of magnetic metal material.

5. The dicer of claim 1, wherein The axial pusher (80) includes a push ring (81), a push rod (82) and a lead screw (83). The push ring (81) is sleeved on the outside of the central shaft (71) and threadedly engaged with the lead screw (83). The lead screw (83) is rotatably supported at both ends. The push rod (82) is connected between the push ring (81) and the sleeve (72).

6. The dicer of claim 5, wherein, There are two lead screws (83), and a scale rod (811) extending to the outside of the pelletizing box (20) is fixed on the push ring (81).

7. The dicer of claim 6, wherein The end of the mounting roller (40) is coaxially fixed with a connecting seat (41) rotatably assembled in the pelletizing box (20), the scale rod (811) is slidably assembled in the connecting seat (41), and the end of the lead screw (83) is fixedly installed with a knob located outside the connecting seat (41).

8. The dicer of any one of claims 1-7, wherein, The feeding roller assembly (30) includes an upper roller (31), a lower roller (32), and a support plate (33) located between the lower roller (32) and the mounting roller (40). The support plate (33) is slidably mounted on the pelletizing box (20), and the pelletizing box (20) is threaded with fastening bolts (23) that are compatible with the support plate (33).

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