A high-strength 3D printing material pelletizing preparation device based on polylactic acid

Abstract

The present invention discloses a high-strength 3D printing material pelletizing and preparation equipment based on polylactic acid, including a frame, a chassis, a cover, a feeding unit, a thickness adjustment component, a pelletizing roller and a power component, wherein the bottom of the chassis is fixedly mounted on the top of the frame, the non-inlet end of the cover is rotatably mounted on the top of the chassis, the feeding unit is mounted on the chassis, the thickness adjustment component is fixedly mounted on the outer wall of the chassis, the roller shaft of the pelletizing roller is rotatably mounted on the outlet end of the chassis, and the power component is fixedly mounted on the frame. The present invention adopts two pelletizing rollers, on the outer surface of which pelletizing blades and clamping blocks are fixedly mounted; a plurality of pelletizing blades are arranged at equal angles with respect to the axis of the pelletizing roller, which can ensure that the material line is evenly cut during the cutting process; the clamping block effectively clamps the material line, avoids the disorder of the material line, ensures that the pelletizing blade can cut accurately, and the cut particles are of uniform size.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic granulation, and in particular to a high-strength 3D printing material granulation preparation device based on polylactic acid. Background Art

[0002] In modern industrial production, 3D printing technology is widely used in many fields, including manufacturing, medical treatment, aerospace, etc. In particular, 3D printing based on polylactic acid (PLA) materials has become one of the favorite choices of manufacturers due to its environmental friendliness and biodegradability. PLA materials are generally linear and are often used in the fused deposition modeling (FDM) process in 3D printing. However, in actual production, this type of PLA material often needs to go through a pelletizing process for subsequent processing, storage and use. The pelletizing process usually uses a pelletizing device to cut the long strips of material into small particles for subsequent melt extrusion or other processing links.

[0003] Existing PLA pelletizing equipment suffers from several common problems, particularly during the conveying and cutting of the pelletizing line, where the pelletizing line often becomes disorganized, leading to suboptimal cutting results. Specifically, the pelletizing line is prone to bending, deflecting, or tangling during the cutting process, resulting in uneven pelletizing and inconsistent particle sizes. These issues not only affect production efficiency but also reduce the quality of the final product. Especially in the production of high-strength PLA, due to the material's relatively rigid nature, the high pressure and friction during cutting can easily lead to pelletizing line disorganization and breakage.

[0004] The core of pelletizing equipment is the pelletizing roller, which rotates to drive blades to cut the material strands. Although existing pelletizing equipment utilizes multiple blades and rollers to improve cutting efficiency and precision, the varying plasticity and rigidity of the material strands make it difficult for the pelletizing rollers to maintain their stability during operation. This can lead to slippage and deformation of the strands as they are transported between the rollers. This phenomenon is particularly severe when processing thicker or harder strands. Disorganization of the strands not only results in inconsistent pellet size but can also affect pellet shape and quality, further impacting downstream processing.

[0005] Existing pelletizing equipment also has drawbacks in the tensioning and guiding of the material strands. To ensure smooth delivery of the strands to the pelletizer rollers, they are typically tensioned and guided by clamping rollers or guide rail systems. However, in practice, existing clamping roller and guide rail systems often struggle to precisely tension and adjust strands of varying diameters and thicknesses, resulting in unstable strand transport. In particular, when uneven force is applied to the strands or friction is excessive, strand misalignment and slippage can occur, leading to inaccurate pellet cutting.

[0006] Therefore, how to provide a high-strength 3D printing material pelletizing and preparation device based on polylactic acid is a problem that technicians in this field urgently need to solve. Summary of the Invention

[0007] One purpose of the present invention is to provide a high-strength 3D printing material pelletizing and preparation equipment based on polylactic acid. The present invention adopts two pelletizing rollers, and pelletizing blades and clamping blocks are fixedly installed on the outer surface of the pelletizing rollers; multiple pelletizing blades are arranged at equal angles to the axis of the pelletizing rollers, which can ensure that the material line is cut evenly during the cutting process; the clamping block effectively clamps the material line, avoids the material line from being disordered, ensures that the pelletizing blades can cut accurately, and the cut particles are of uniform size.

[0008] The present invention adopts the design of the thickness adjustment component. When the thickness or diameter of different material lines needs to be changed, the thickness adjustment motor can be used to drive the thickness adjustment bevel gear group to rotate, and then drive the thickness adjustment threaded rod to rotate, so as to adjust the relative position between the two pelletizing rollers; this design enables the equipment to adapt to material lines of different diameters and thicknesses, effectively ensuring the clamping effect of the pelletizing roller during the pelletizing process, thereby avoiding the problem of uneven particles or difficult cutting; the power motor drives the belt strip to drive the second pulley to rotate, and then drives the rotation of the pelletizing roller, ensuring that the pelletizing roller rotates at a stable speed and can adapt to changes in the material line; when the position of the pelletizing roller changes, the power component drives the tensioning plate to move by adjusting the spiral torsion bar, and the auxiliary roller tightens the belt strip, thereby ensuring the stability of the power transmission system and avoiding the problem of the belt being too loose or too tight.

[0009] The present invention includes a plurality of clamping rollers and a clamping slide through a clamping assembly design; by adjusting the relative position between the clamping threaded rod and the clamping slide, the clamping force of the clamping roller on the material line can be accurately adjusted, thereby ensuring stable transmission of the material line and avoiding confusion; the docking assembly includes two docking plates and a plurality of guide plates, which can accurately guide the material line into the pelletizing roller; through the control of the clamping motor and the docking motor, it is ensured that the material line is evenly clamped and guided in front of the pelletizing roller, thereby improving the cutting accuracy; the docking pressure wheel can alleviate the dragging force of the clamping roller when clamping the material line, thereby avoiding smooth transmission of the material line due to excessive clamping, and at the same time, the docking pressure wheel guides the material into the pelletizing roller, thereby effectively avoiding confusion of multiple material lines.

[0010] According to an embodiment of the present invention, a high-strength 3D printing material pelletizing and preparing device based on polylactic acid includes a frame, a chassis, a cover, a feeding unit, a thickness adjustment component, a pelletizing roller, and a power component, wherein the bottom of the chassis is fixedly mounted on the top of the frame, the non-inlet end of the cover is rotatably mounted on the top of the chassis, the feeding unit is mounted on the chassis, the thickness adjustment component is fixedly mounted on the outer wall of the chassis, the roller shaft of the pelletizing roller is rotatably mounted on the outlet end of the chassis, and the power component is fixedly mounted on the frame;

[0011] A pelletizing blade is fixedly provided on the outer surface of the pelletizing roller, a clamping block is fixedly provided on the outer surface of the pelletizing roller, a blade groove is provided on the outer surface of the clamping block, a plurality of pelletizing blades are provided, and the plurality of pelletizing blades are arranged at equal angles to the axis of the pelletizing roller, a plurality of clamping blocks are provided, and the plurality of clamping blocks are arranged at equal angles to the axis of the pelletizing roller, and the pelletizing blades and the clamping blocks are staggered;

[0012] The feeding unit includes a clamping assembly and a docking assembly, wherein the clamping assembly is slidably mounted on both sides of the chassis, and the docking assembly is fixedly mounted on both sides of the chassis;

[0013] The clamping assembly includes four clamping rollers, wherein the four clamping rollers form a group of two, and the two groups of clamping rollers are symmetrically arranged;

[0014] The docking assembly includes a docking plate and a guide plate. There are two docking plates, which are symmetrically arranged. Both ends of the two docking plates are fixedly mounted on the inner walls on both sides of the chassis, and the guide plate is slidably mounted on the opposite end of the two docking plates.

[0015] Furthermore, the thickness adjusting component includes a thickness adjusting motor, a thickness adjusting bevel gear group, a thickness adjusting threaded rod, a thickness adjusting groove, a thickness adjusting guide rod and a thickness adjusting slide, wherein the base of the thickness adjusting motor is fixedly mounted on the bottom of the chassis, the input end bevel gear of the thickness adjusting bevel gear group is fixedly mounted on the rotating shaft of the thickness adjusting motor, the output end bevel gear of the thickness adjusting bevel gear group is fixedly mounted on the bottom of the thickness adjusting threaded rod, the top of the thickness adjusting threaded rod is rotatably inserted into the box wall of the chassis, the thickness adjusting groove is opened on both sides of the chassis, the thickness adjusting guide rod is fixedly mounted on the groove surface of the thickness adjusting groove, one end of the thickness adjusting slide is slidably sleeved on the thickness adjusting guide rod, the other end of the thickness adjusting slide is threadedly sleeved on the top of the thickness adjusting threaded rod, and the middle position of the thickness adjusting slide is rotatably sleeved on the roller shaft of the pelletizing roller.

[0016] Furthermore, the power assembly includes a power motor, a first pulley, a belt strip and a second pulley, wherein the base of the power motor is fixedly mounted on the frame, the first pulley is fixedly mounted on the rotating shaft of the power motor, the axle of the second pulley is fixedly mounted on the roller shaft of the pelletizing roller, one end of the belt strip is sleeved on the first pulley, and the other end of the belt strip is sleeved on the second pulley.

[0017] Furthermore, the power assembly also includes a rotating frame, a spiral torsion rod, a power bevel gear set and a power spiral rod, wherein the rotating frame is fixedly mounted on the outer wall of the chassis, the threaded end of the spiral torsion rod is threadedly inserted into the rotating frame, the input end bevel gear of the power bevel gear set is fixedly mounted on the threaded end of the spiral torsion rod, and the power spiral rod is fixedly mounted on the output end bevel gear of the power bevel gear set.

[0018] Furthermore, the power assembly also includes a power seat, a power guide rod, a tensioning plate and an auxiliary roller. The power seat is fixedly mounted on the outer wall of the chassis, the power seat is threadedly sleeved on the power screw rod, one end of the power guide rod is fixedly mounted on the power seat, the other end of the power guide rod is slidably inserted in the tensioning plate, one end of the tensioning plate is threadedly inserted on the power screw rod, and the roller shaft of the auxiliary roller is rotatably mounted on the other end of the tensioning plate.

[0019] Furthermore, the clamping assembly also includes a clamping groove, a clamping slide, a clamping spring and a clamping slide, wherein the clamping groove is opened on both sides of the chassis, the clamping slide is slidably inserted into one side of the clamping groove, one end of the clamping spring is fixedly mounted on the clamping slide, the other end of the clamping spring is fixedly mounted on the clamping slide, the clamping slide is slidably mounted on the other side of the clamping groove, and the middle position of the clamping slide is rotatably sleeved on the roller shaft of the clamping roller.

[0020] Furthermore, the clamping assembly also includes a clamping frame, a clamping torsion rod, a clamping bevel gear, a clamping threaded rod, a rotating rod seat and a connecting block, wherein the clamping frame is fixedly mounted on both sides of the chassis, the threaded end of the clamping torsion rod is screwed into the clamping frame, the input end bevel gear of the clamping bevel gear is fixedly mounted on the threaded end of the clamping torsion rod, the output end of the clamping bevel gear is fixedly mounted on one end of the clamping threaded rod, the clamping threaded rod is rotatably mounted on the rotating rod seat, the base of the rotating rod seat is fixedly mounted on both sides of the chassis, one end of the connecting block is fixedly mounted on the clamping slide, and the other end of the connecting block is threadedly sleeved on the other end of the clamping threaded rod.

[0021] Furthermore, the docking assembly also includes a connecting plate, a docking slide and a travel groove, wherein one end of the connecting plate is fixedly mounted on both sides of the chassis, the other end of the connecting plate is fixedly mounted on the docking plate, the docking slide is opened on the docking plate, and the travel groove is opened on the docking plate.

[0022] Furthermore, the docking assembly also includes a clamping motor, a clamping bevel gear set, a clamping gear pair, a clamping threaded rod and a clamping slider, wherein the base of the clamping motor is fixedly installed on the chassis, the input end bevel gear of the clamping bevel gear set is fixedly installed on the rotating shaft of the clamping motor, the output end bevel gear of the clamping bevel gear set is fixedly installed on the clamping gear pair on the axle, one end of the clamping threaded rod is fixedly installed on the clamping gear pair, the clamping slider is fixedly installed on the guide plate, the clamping slider is slidably installed in the docking groove, the clamping slider is threadedly sleeved on the other end of the clamping threaded rod, and the clamping threaded rod is rotatably installed in the docking plate.

[0023] Furthermore, the docking assembly also includes a docking motor, a first docking bevel gear set, a docking gear pair, a prismatic column, a gear rack, a second docking bevel gear set, a transmission rod and a docking pressure wheel, wherein the base of the docking motor is fixedly mounted on the chassis, the input end bevel gear of the first docking bevel gear set is fixedly mounted on the rotating shaft of the docking motor, the output end bevel gear axle of the first docking bevel gear set is fixedly mounted on the docking gear pair, one end of the prismatic column is fixedly mounted on the docking gear pair, the other end of the prismatic column is rotatably mounted in the docking plate, the gear rack is slidably sleeved on the prismatic column, the input end bevel gear of the second docking bevel gear set is slidably sleeved on the prismatic column, the output end bevel gear of the second docking bevel gear set is fixedly mounted on one end of the transmission rod, the transmission rod is rotatably mounted on the gear rack, the other end of the transmission rod is rotatably inserted into the guide plate, and the docking pressure wheel is fixedly mounted on the transmission rod.

[0024] The beneficial effects of the present invention are:

[0025] The present invention adopts two pelletizing rollers, on the outer surfaces of which pelletizing blades and clamping blocks are fixedly mounted; the multiple pelletizing blades are arranged at equal angles to the axis of the pelletizing roller, which can ensure that the material line is cut evenly during the cutting process; the clamping block effectively clamps the material line, avoiding the material line from being disordered, ensuring that the pelletizing blades can cut accurately and the cut particles are of uniform size;

[0026] The present invention adopts the design of the thickness adjustment component. When the thickness or diameter of different material lines needs to be changed, the thickness adjustment motor can be used to drive the thickness adjustment bevel gear group to rotate, and then drive the thickness adjustment threaded rod to rotate, so as to adjust the relative position between the two pelletizing rollers; this design enables the equipment to adapt to material lines of different diameters and thicknesses, effectively ensuring the clamping effect of the pelletizing roller during the pelletizing process, thereby avoiding the problem of uneven particles or difficult cutting; the power motor drives the belt strip to drive the second pulley to rotate, and then drives the rotation of the pelletizing roller, ensuring that the pelletizing roller rotates at a stable speed and can adapt to changes in the material line; when the position of the pelletizing roller changes, the power component drives the tensioning plate to move by adjusting the spiral torsion bar, and the auxiliary roller tightens the belt strip, thereby ensuring the stability of the power transmission system and avoiding the problem of the belt being too loose or too tight.

[0027] The present invention includes a plurality of clamping rollers and a clamping slide through a clamping assembly design; by adjusting the relative position between the clamping threaded rod and the clamping slide, the clamping force of the clamping roller on the material line can be accurately adjusted, thereby ensuring stable transmission of the material line and avoiding confusion; the docking assembly includes two docking plates and a plurality of guide plates, which can accurately guide the material line into the pelletizing roller; through the control of the clamping motor and the docking motor, it is ensured that the material line is evenly clamped and guided in front of the pelletizing roller, thereby improving the cutting accuracy; the docking pressure wheel can alleviate the dragging force of the clamping roller when clamping the material line, thereby avoiding smooth transmission of the material line due to excessive clamping, and at the same time, the docking pressure wheel guides the material into the pelletizing roller, thereby effectively avoiding confusion of multiple material lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure from a first perspective of a high-strength polylactic acid-based 3D printing material pelletizing and preparation device proposed by the present invention;

[0030] Figure 2 This is a schematic diagram of the overall structure from a second perspective of a high-strength polylactic acid-based 3D printing material pelletizing and preparation device proposed in the present invention;

[0031] Figure 3 This is a schematic diagram of the pelletizing structure of a pelletizing equipment for preparing high-strength 3D printing materials based on polylactic acid proposed in the present invention;

[0032] Figure 4 The invention proposes a high-strength 3D printing material pelletizing equipment based on polylactic acid. Figure 3 A magnified view of point A;

[0033] Figure 5 The invention proposes a high-strength 3D printing material pelletizing equipment based on polylactic acid. Figure 3 Enlarged view of point B;

[0034] Figure 6 A partial schematic diagram of a frame of a polylactic acid-based high-strength 3D printing material pelletizing and preparation device proposed in the present invention;

[0035] Figure 7 A partial schematic diagram of a pelletizing roller of a pelletizing and preparing device for high-strength 3D printing materials based on polylactic acid proposed in the present invention;

[0036] Figure 8 The invention proposes a high-strength 3D printing material pelletizing equipment based on polylactic acid. Figure 7 Enlarged view of point C;

[0037] Figure 9 This is a schematic structural diagram of a docking plate for a high-strength 3D printing material pelletizing and preparation device based on polylactic acid proposed in the present invention;

[0038] Figure 10 This invention proposes a high-strength 3D printing material pelletizing and preparation device based on polylactic acid Figure 9 Enlarged view of point D;

[0039] Figure 11 This invention proposes a high-strength 3D printing material pelletizing and preparation device based on polylactic acid Figure 9 Enlarged view of point E;

[0040] Figure 12 This invention proposes a high-strength 3D printing material pelletizing and preparation device based on polylactic acid Figure 9 Enlarged view of point F.

[0041] In the figure: 1. Frame; 2. Chassis; 3. Cover; 4. Thickness adjustment assembly; 4.1. Thickness adjustment motor; 4.2. Thickness adjustment bevel gear set; 4.3. Thickness adjustment threaded rod; 4.4. Thickness adjustment groove; 4.5. Thickness adjustment guide rod; 4.6. Thickness adjustment slide; 5. Pelletizing roller; 5.1. Pelletizing blade; 5.2. Clamping block; 5.3. Blade groove; 6. Power assembly; 6.1. Power motor; 6.2. First pulley; 6.3. Belt strip; 6.4. Second pulley; 6.5. Rotating frame; 6.6. Screw torsion bar; 6.7. Power bevel gear set; 6.8. Power screw rod; 6.9. Power seat; 6.10. Power guide rod; 6.11. Tension plate; 6.12. Auxiliary roller; 7. Clamping assembly; 7.1. Clamping roller; 7.2. Clamping groove; 7.3. Clamping slide 8.11, docking motor; 8.12, first docking bevel gear set; 8.13, docking gear pair; 8.14, angular column; 8.15, gear frame; 8.16, second docking bevel gear set; 8.17, transmission rod; 8.18, docking pressure wheel. DETAILED DESCRIPTION

[0042] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0043] Please refer to Figures 1 to 12 The present invention provides a high-strength 3D printing material pelletizing and preparation equipment based on polylactic acid, comprising a frame 1, a chassis 2, a cover 3, a feeding unit, a thickness adjustment component 4, a pelletizing roller 5 and a power component 6, wherein the bottom of the chassis 2 is fixedly mounted on the top of the frame 1, the non-inlet end of the cover 3 is rotatably mounted on the top of the chassis 2, a discharging bevel is provided on the side of the chassis 2 close to the pelletizing roller 5, the feeding unit is mounted on the chassis 2, the thickness adjustment component 4 is fixedly mounted on the outer wall of the chassis 2, the roller shaft of the pelletizing roller 5 is rotatably mounted on the outlet end of the chassis 2, and the power component 6 is fixedly mounted on the frame 1; a pelletizing blade is fixedly provided on the outer surface of the pelletizing roller 5 5.1, there are two pelletizing rollers 5, and two corresponding power components 6 are provided. A clamping block 5.2 is fixedly provided on the outer surface of the pelletizing roller 5, and a blade groove 5.3 is opened on the outer surface of the clamping block 5.2. A plurality of pelletizing blades 5.1 are provided, and the plurality of pelletizing blades 5.1 are arranged at equal angles to the axis of the pelletizing roller 5. A plurality of clamping blocks 5.2 are provided, and the plurality of clamping blocks 5.2 are arranged at equal angles to the axis of the pelletizing roller 5. The pelletizing blades 5.1 and the clamping blocks 5.2 are staggered. The feeding unit includes a clamping assembly 7 and a docking assembly 8. The clamping assembly 7 is slidably mounted on both sides of the chassis 2, and the docking assembly 8 is fixedly mounted on both sides of the chassis 2.

[0044] Specifically, the power assembly 6 includes a power motor 6.1, a first pulley 6.2, a belt strip 6.3 and a second pulley 6.4, wherein the base of the power motor 6.1 is fixedly mounted on the frame 1, the first pulley 6.2 is fixedly mounted on the rotating shaft of the power motor 6.1, the axle of the second pulley 6.4 is fixedly mounted on the roller shaft of the pelletizing roller 5, one end of the belt strip 6.3 is sleeved on the first pulley 6.2, and the other end of the belt strip 6.3 is sleeved on the second pulley 6.4; the power assembly 6 also includes a rotating frame 6.5, a spiral torsion bar 6.6, a power bevel gear set 6.7 and a power spiral rod 6.8, wherein the rotating frame 6.5 is fixedly mounted on the outer wall of the chassis 2, and the threaded end of the spiral torsion bar 6.6 is threadedly inserted into the rotating frame 6.5. The input end bevel gear of the power bevel gear set 6.7 is fixedly mounted on the threaded end of the spiral torsion bar 6.6, and the power screw rod 6.8 is fixedly mounted on the output end bevel gear of the power bevel gear set 6.7; the power assembly 6 also includes a power seat 6.9, a power guide rod 6.10, a tensioning plate 6.11 and an auxiliary roller 6.12. The power seat 6.9 is fixedly mounted on the outer wall of the chassis 2, the power seat 6.9 is threadedly sleeved on the power screw rod 6.8, one end of the power guide rod 6.10 is fixedly mounted on the power seat 6.9, and the other end of the power guide rod 6.10 is slidably inserted in the tensioning plate 6.11. One end of the tensioning plate 6.11 is threadedly inserted on the power screw rod 6.8, and the roller shaft of the auxiliary roller 6.12 is rotatably mounted on the other end of the tensioning plate 6.11.

[0045] More specifically, the thickness adjusting component 4 includes a thickness adjusting motor 4.1, a thickness adjusting bevel gear set 4.2, a thickness adjusting threaded rod 4.3, a thickness adjusting groove 4.4, a thickness adjusting guide rod 4.5 and a thickness adjusting slide 4.6, wherein the base of the thickness adjusting motor 4.1 is fixedly mounted on the bottom of the chassis 2, the input end bevel gear of the thickness adjusting bevel gear set 4.2 is fixedly mounted on the rotating shaft of the thickness adjusting motor 4.1, the output end bevel gear of the thickness adjusting bevel gear set 4.2 is fixedly mounted on the bottom of the thickness adjusting threaded rod 4.3, the top of the thickness adjusting threaded rod 4.3 is rotatably inserted into the box wall of the chassis 2, the thickness adjusting groove 4.4 is opened on both sides of the chassis 2, the thickness adjusting guide rod 4.5 is fixedly mounted on the groove surface of the thickness adjusting groove 4.4, one end of the thickness adjusting slide 4.6 is slidably sleeved on the thickness adjusting guide rod 4.5, the other end of the thickness adjusting slide 4.6 is threadedly sleeved on the top of the thickness adjusting threaded rod 4.3, and the middle position of the thickness adjusting slide 4.6 is rotatably sleeved on the roller shaft of the pelletizing roller 5.

[0046] More specifically, the clamping assembly 7 includes a clamping roller 7.1, which is provided with four clamping rollers 7.1, each of which is two in a group, and the two groups of clamping rollers 7.1 are symmetrically arranged; the clamping assembly 7 also includes a clamping groove 7.2, a clamping slide 7.3, a clamping spring 7.4 and a clamping slide 7.5, wherein the clamping groove 7.2 is opened on both sides of the chassis 2, the clamping slide 7.3 is slidably inserted into one side of the clamping groove 7.2, one end of the clamping spring 7.4 is fixedly mounted on the clamping slide 7.3, the other end of the clamping spring 7.4 is fixedly mounted on the clamping slide 7.5, the clamping slide 7.5 is slidably mounted on the other side of the clamping groove 7.2, and the middle position of the clamping slide 7.5 is rotatably sleeved on the roller shaft of the clamping roller 7.1. The clamping assembly 7 also includes The clamping frame 7.6, the clamping torsion bar 7.7, the clamping bevel gear 7.8, the clamping threaded rod 7.9, the rotating rod seat 7.10 and the connecting block 7.11, wherein the clamping frame 7.6 is fixedly mounted on both sides of the chassis 2, the threaded end of the clamping torsion bar 7.7 is screwed into the clamping frame 7.6, the input end bevel gear of the clamping bevel gear 7.8 is fixedly mounted on the threaded end of the clamping torsion bar 7.7, the output end of the clamping bevel gear 7.8 is fixedly mounted on one end of the clamping threaded rod 7.9, the clamping threaded rod 7.9 is rotatably mounted on the rotating rod seat 7.10, the base of the rotating rod seat 7.10 is fixedly mounted on both sides of the chassis 2, one end of the connecting block 7.11 is fixedly mounted on the clamping slide 7.3, and the other end of the connecting block 7.11 is threadedly sleeved on the other end of the clamping threaded rod 7.9.

[0047] More specifically, the docking assembly 8 includes a docking plate 8.1 and a guide plate 8.2. Two docking plates 8.1 are provided, and the two docking plates 8.1 are symmetrically arranged. Both ends of the two docking plates 8.1 are fixedly mounted on the inner walls on both sides of the chassis 2, and the guide plate 8.2 is slidably mounted on the opposite ends of the two docking plates 8.1; the docking assembly 8 also includes a connecting plate 8.3, a docking slide 8.4 and a travel groove 8.5, wherein one end of the connecting plate 8.3 is fixedly mounted on both sides of the chassis 2, and the other end of the connecting plate 8.3 is fixedly mounted on the docking plate 8.1, the docking slide 8.4 is opened on the docking plate 8.1, and the travel groove 8.5 is opened on the docking plate 8.1.

[0048] The docking assembly 8 also includes a clamping motor 8.6, a clamping bevel gear set 8.7, a clamping gear pair 8.8, a clamping threaded rod 8.9 and a clamping slider 8.10, wherein the base of the clamping motor 8.6 is fixedly mounted on the chassis 2, the input end bevel gear of the clamping bevel gear set 8.7 is fixedly mounted on the rotating shaft of the clamping motor 8.6, the output end bevel gear axle of the clamping bevel gear set 8.7 is fixedly mounted on the clamping gear pair 8.8, one end of the clamping threaded rod 8.9 is fixedly mounted on the clamping gear pair 8.8, the clamping slider 8.10 is fixedly mounted on the guide plate 8.2, the clamping slider 8.10 is slidably mounted in the docking groove 8.4, the clamping slider 8.10 is threadedly sleeved on the other end of the clamping threaded rod 8.9, and the clamping threaded rod 8.9 is rotatably mounted in the docking plate 8.1.

[0049] The docking assembly 8 also includes a docking motor 8.11, a first docking bevel gear set 8.12, a docking gear pair 8.13, an angular column 8.14, a gear rack 8.15, a second docking bevel gear set 8.16, a transmission rod 8.17 and a docking pressure wheel 8.18, wherein the base of the docking motor 8.11 is fixedly mounted on the chassis 2, the input end bevel gear of the first docking bevel gear set 8.12 is fixedly mounted on the rotating shaft of the docking motor 8.11, the output end bevel gear shaft of the first docking bevel gear set 8.12 is fixedly mounted on the docking gear pair 8.13, one end of the angular column 8.14 is fixed Fixedly mounted on the docking gear pair 8.13, the other end of the angular column 8.14 is rotatably mounted in the docking plate 8.1, the gear rack 8.15 is slidably sleeved on the angular column 8.14, the input end bevel gear of the second docking bevel gear set 8.16 is slidably sleeved on the angular column 8.14, the output end bevel gear of the second docking bevel gear set 8.16 is fixedly mounted on one end of the transmission rod 8.17, the transmission rod 8.17 is rotatably mounted on the gear rack 8.15, the other end of the transmission rod 8.17 is rotatably plugged into the guide plate 8.2, and the docking pressure wheel 8.18 is fixedly mounted on the transmission rod 8.17.

[0050] Furthermore, by opening the machine cover 3, the material line is passed through the two clamping rollers 7.1, and then passed from the clamping rollers 7.1 to the guide plate 8.2 of the two docking plates 8.1, and then stuffed into the intersection of the two pelletizing rollers 5, and the pelletizing preparation equipment is started. At the beginning, the pellets are cut out of different sizes due to being forced into the two pelletizing rollers 5, and the head material particles are removed.

[0051] The power motor 6.1 is started, and the rotation of the power motor 6.1 drives the rotation of the first pulley 6.2, and the rotation of the first pulley 6.2 drives the rotation of the belt strip 6.3. The rotation of the belt strip 6.3 drives the rotation of the second pulley 6.4, and the rotation of the second pulley 6.4 drives the rotation of a pelletizing roller 5. The relative motion of the two pelletizing rollers 5, when the two pelletizing rollers 5 rotate, the pelletizing blade 5.1 of one pelletizing roller 5 is inserted into the blade groove 5.3 of the other pelletizing roller 5, completing the cutting of the material line. In the process of the pelletizing blade 5.1 cutting the material line, the clamping blocks 5.2 of the two pelletizing rollers 5 will clamp the material line. After the pelletizing blade 5.1 has cut, the clamping blocks 5.2 of the two pelletizing rollers 5 are transferred to the pelletizing blade 5.1 for cutting, and the material particles are discharged along the oblique discharge port of the chassis 2; the clamping blocks 5.2 of the two pelletizing rollers 5 will clamp the material line, effectively preventing the material line from being disordered, resulting in the material particles cut out by the pelletizing blade 5.1 being of different sizes.

[0052] When changing the thickness or diameter of different material lines, the thickness adjustment motor 4.1 is started. The rotation of the thickness adjustment motor 4.1 drives the rotation of the thickness adjustment bevel gear set 4.2. The rotation of the thickness adjustment bevel gear set 4.2 drives the rotation of the thickness adjustment threaded rod 4.3. The rotation of the thickness adjustment threaded rod 4.3 drives the position change of the thickness adjustment slide 4.6 in the thickness adjustment groove 4.4 and the thickness adjustment guide rod 4.5. The thickness adjustment slide 4.6 drives the two pelletizing rollers 5 to move closer in the relative direction or farther away in the opposite direction, so as to adapt to the thickness or diameter of different material lines, and effectively ensure that the clamping blocks 5.2 of the two pelletizing rollers 5 will clamp the material line during the cutting process.

[0053] The positions of the two pelletizing rollers 5 change, and the position of the second pulley 6.4 corresponding to the two pelletizing rollers 5 changes, which causes the belt strip 6.3 to become loose on the first pulley 6.2 and the second pulley 6.4, or to be too tight. By rotating the spiral torsion bar 6.6, the rotation of the spiral torsion bar 6.6 drives the rotation of the power bevel gear set 6.7, and the rotation of the power bevel gear set 6.7 drives the power screw rod 6.8 to be caught. The rotation of the power screw rod 6.8 drives the tensioning plate 6.11 to move along the power guide rod 6.10, and the auxiliary roller 6.12 thereby pulls the belt strip 6.3, so that the belt strip 6.3 can be effectively transmitted.

[0054] By rotating the clamping torsion bar 7.7, the rotation of the clamping torsion bar 7.7 drives the rotation of the clamping bevel gear 7.8, the rotation of the clamping bevel gear 7.8 drives the rotation of the clamping threaded rod 7.9, and the rotation of the clamping threaded rod 7.9 drives the two clamping slides 7.3 to move in relative directions or in opposite directions. By adjusting the position of the clamping slide 7.3 in the clamping groove 7.2, the strength of the elastic force applied to the clamping slide 7.5 by the clamping spring 7.4 is adjusted, thereby achieving the purpose of adjusting the strength of the two clamping rollers 7.1 to clamp the material line.

[0055] The material line enters the docking plate 8.1, passes through the two guide plates 8.2, and starts the clamping motor 8.6. The rotation of the rotating shaft of the clamping motor 8.6 drives the rotation of the clamping bevel gear set 8.7. The rotation of the clamping bevel gear set 8.7 drives the rotation of the clamping gear pair 8.8. The rotation of the clamping gear pair 8.8 drives the rotation of the clamping threaded rods 8.9 in the two docking plates 8.1. The rotation of the clamping threaded rods 8.9 drives the clamping slider 8.10 to move in the docking chute 8.4. The clamping slider 8.10 drives the two guide plates 8.2 to approach each other, so that the docking pressure wheels 8.18 of the two guide plates 8.2 clamp the material line.

[0056] By starting the docking motor 8.11, the rotation of the docking motor 8.11 drives the rotation of the first docking bevel gear set 8.12, the rotation of the first docking bevel gear set 8.12 drives the rotation of the docking gear pair 8.13, the rotation of the docking gear pair 8.13 drives the rotation of the angular column 8.14 on the two gears, the input end bevel gear of the second docking bevel gear set 8.16 is slidably sleeved on the angular column 8.14, and the rotation of the angular column 8.14 drives the input end bevel gear of the second docking bevel gear set 8.16 The rotation of the bevel gear at the output end of the second docking bevel gear set 8.16 drives the rotation of the transmission rod 8.17, and the rotation of the transmission rod 8.17 drives the rotation of the docking pressure wheel 8.18. The rotation of the docking pressure wheel 8.18 drives the material line to be stably transported to the pelletizing roller 5, so that the size of the material particles cut by the pelletizing roller 5 remains consistent. The docking pressure wheel 8.18 relieves the dragging force required by the clamping roller 7.1 to clamp the material line and guides the material into the pelletizing roller 5, so that multiple material lines become disordered.

[0057] The device uses two pelletizing rollers 5, on the outer surface of which pelletizing blades 5.1 and clamping blocks 5.2 are fixedly mounted; multiple pelletizing blades 5.1 are arranged at equal angles to the axis of the pelletizing roller 5, which can ensure that the material line is cut evenly during the cutting process.

[0058] The clamping block 5.2 effectively clamps the material line, avoids the material line from being disordered, and ensures that the pelletizing blade 5.1 can cut accurately and the pellets cut out are of uniform size.

[0059] The thickness adjustment component 4 is designed so that when the thickness or diameter of different material wires needs to be changed, the thickness adjustment motor 4.1 can drive the thickness adjustment bevel gear set 4.2 to rotate, and then drive the thickness adjustment threaded rod 4.3 to rotate, thereby adjusting the relative position between the two pelletizing rollers 5; this design allows the equipment to adapt to material wires of different diameters and thicknesses, effectively ensuring the clamping effect of the pelletizing roller 5 during the pelletizing process, thereby avoiding problems such as uneven particles or difficult cutting.

[0060] The power motor 6.1 drives the belt strip 6.3 to drive the second pulley 6.4 to rotate, and then drives the pelletizing roller 5 to rotate, ensuring that the pelletizing roller 5 rotates at a stable speed and can adapt to changes in the material line.

[0061] When the position of the pelletizing roller 5 changes, the power assembly 6 drives the tensioning plate 6.11 to move by adjusting the spiral torsion bar 6.6, and the auxiliary roller 6.12 tightens the belt strip 6.3 to ensure the stability of the power transmission system and avoid the problem of the belt being too loose or too tight.

[0062] The clamping assembly 7 is designed to include multiple clamping rollers 7.1 and a clamping slide 7.3; by adjusting the relative position between the clamping threaded rod 7.9 and the clamping slide 7.3, the clamping force of the clamping roller 7.1 on the material line can be accurately adjusted, thereby ensuring stable transmission of the material line and avoiding confusion.

[0063] The docking assembly 8 comprises two docking plates 8.1 and a plurality of guide plates 8.2, which can accurately guide the material line into the pelletizing roller 5; controlled by the clamping motor 8.6 and the docking motor 8.11, the material line is evenly clamped and guided in front of the pelletizing roller 5, thereby improving cutting accuracy.

[0064] The docking pressure wheel 8.18 can relieve the dragging force of the clamping roller 7.1 on the material line when clamping, thereby preventing the material line from being transmitted unsmoothly due to excessive clamping. At the same time, the docking pressure wheel 8.18 guides the material into the pelletizing roller 5, effectively preventing multiple material lines from being disordered.

[0065] By precisely controlling the clamping force of the clamping block 5.2 and the cutting action of the pelletizing blade 5.1, the stability of the material line and the uniformity of the pellets during the pelletizing process are ensured, and the size fluctuation of the pellets is reduced.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-strength 3D printing material pelletizing and preparation device based on polylactic acid, characterized in that: The invention comprises a frame (1), a chassis (2), a cover (3), a feeding unit, a thickness adjustment component (4), a pelletizing roller (5) and a power component (6), wherein the bottom of the chassis (2) is fixedly mounted on the top of the frame (1), the non-inlet end of the cover (3) is rotatably mounted on the top of the chassis (2), the feeding unit is mounted on the chassis (2), the thickness adjustment component (4) is fixedly mounted on the outer wall of the chassis (2), the roller shaft of the pelletizing roller (5) is rotatably mounted on the outlet end of the chassis (2), and the power component (6) is fixedly mounted on the frame (1); A pelletizing blade (5.1) is fixedly arranged on the outer surface of the pelletizing roller (5), a clamping block (5.2) is fixedly arranged on the outer surface of the pelletizing roller (5), a blade groove (5.3) is opened on the outer surface of the clamping block (5.2), a plurality of pelletizing blades (5.1) are arranged, and the plurality of pelletizing blades (5.1) are arranged at equal angles to the axis of the pelletizing roller (5), a plurality of clamping blocks (5.2) are arranged, and the plurality of clamping blocks (5.2) are arranged at equal angles to the axis of the pelletizing roller (5), and the pelletizing blades (5.1) and the clamping blocks (5.2) are arranged in an alternating manner; The feeding unit comprises a clamping assembly (7) and a docking assembly (8), wherein the clamping assembly (7) is slidably mounted on both sides of the chassis (2), and the docking assembly (8) is fixedly mounted on both sides of the chassis (2); The clamping assembly (7) comprises a clamping roller (7.1), four of which are provided, two of which form a group, and the two groups of clamping rollers (7.1) are symmetrically arranged; The docking assembly (8) comprises a docking plate (8.1) and a guide plate (8.2), two docking plates (8.1) are provided, the two docking plates (8.1) are symmetrically arranged, both ends of the two docking plates (8.1) are fixedly mounted on the inner walls of both sides of the chassis (2), and the guide plate (8.2) is slidably mounted on the opposite ends of the two docking plates (8.1).

2. According to claim 1, a high-strength 3D printing material pelletizing and preparation device based on polylactic acid is characterized in that: The thickness adjustment component (4) comprises a thickness adjustment motor (4.1), a thickness adjustment bevel gear set (4.2), a thickness adjustment threaded rod (4.3), a thickness adjustment groove (4.4), a thickness adjustment guide rod (4.5) and a thickness adjustment slide plate (4.6), wherein the base of the thickness adjustment motor (4.1) is fixedly mounted on the bottom of the chassis (2), the input end bevel gear of the thickness adjustment bevel gear set (4.2) is fixedly mounted on the rotating shaft of the thickness adjustment motor (4.1), and the output end bevel gear of the thickness adjustment bevel gear set (4.2) is fixedly mounted on the rotating shaft of the thickness adjustment threaded rod (4.3). The top of the thickness adjusting threaded rod (4.3) is rotatably inserted into the box wall of the chassis (2), the thickness adjusting groove (4.4) is arranged on both sides of the chassis (2), the thickness adjusting guide rod (4.5) is fixedly installed on the groove surface of the thickness adjusting groove (4.4), one end of the thickness adjusting slide plate (4.6) is slidably sleeved on the thickness adjusting guide rod (4.5), the other end of the thickness adjusting slide plate (4.6) is threadedly sleeved on the top of the thickness adjusting threaded rod (4.3), and the middle position of the thickness adjusting slide plate (4.6) is rotatably sleeved on the roller shaft of the pelletizing roller (5).

3. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 1 is characterized in that: The power assembly (6) comprises a power motor (6.1), a first pulley (6.2), a belt strip (6.3) and a second pulley (6.4), wherein the base of the power motor (6.1) is fixedly mounted on the frame (1), the first pulley (6.2) is fixedly mounted on the rotating shaft of the power motor (6.1), the axle of the second pulley (6.4) is fixedly mounted on the roller shaft of the pelletizing roller (5), one end of the belt strip (6.3) is sleeved on the first pulley (6.2), and the other end of the belt strip (6.3) is sleeved on the second pulley (6.4).

4. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 3 is characterized in that: The power assembly (6) further comprises a rotating frame (6.5), a spiral torsion bar (6.6), a power bevel gear set (6.7) and a power spiral rod (6.8), wherein the rotating frame (6.5) is fixedly mounted on the outer wall of the chassis (2), the threaded end of the spiral torsion bar (6.6) is threadedly plugged into the rotating frame (6.5), the input end bevel gear of the power bevel gear set (6.7) is fixedly mounted on the threaded end of the spiral torsion bar (6.6), and the power spiral rod (6.8) is fixedly mounted on the output end bevel gear of the power bevel gear set (6.7).

5. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 4, characterized in that: The power assembly (6) also includes a power seat (6.9), a power guide rod (6.10), a tensioning plate (6.11) and an auxiliary roller (6.12); the power seat (6.9) is fixedly mounted on the outer wall of the chassis (2); the power seat (6.9) is threadedly sleeved on the power screw rod (6.8); one end of the power guide rod (6.10) is fixedly mounted on the power seat (6.9); the other end of the power guide rod (6.10) is slidably inserted in the tensioning plate (6.11); one end of the tensioning plate (6.11) is threadedly inserted on the power screw rod (6.8); and the roller shaft of the auxiliary roller (6.12) is rotatably mounted on the other end of the tensioning plate (6.11).

6. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 1, characterized in that: The clamping assembly (7) also includes a clamping groove (7.2), a clamping slide (7.3), a clamping spring (7.4) and a clamping slide (7.5), wherein the clamping groove (7.2) is provided on both sides of the chassis (2), the clamping slide (7.3) is slidably inserted into one side of the clamping groove (7.2), one end of the clamping spring (7.4) is fixedly mounted on the clamping slide (7.3), the other end of the clamping spring (7.4) is fixedly mounted on the clamping slide (7.5), the clamping slide (7.5) is slidably mounted on the other side of the clamping groove (7.2), and the middle position of the clamping slide (7.5) is rotatably sleeved on the roller shaft of the clamping roller (7.1).

7. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 6, characterized in that: The clamping assembly (7) further comprises a clamping frame (7.6), a clamping torsion bar (7.7), a clamping bevel gear (7.8), a clamping threaded rod (7.9), a rotating rod seat (7.10) and a connecting block (7.11), wherein the clamping frame (7.6) is fixedly mounted on both sides of the chassis (2), the threaded end of the clamping torsion bar (7.7) is screwed into the clamping frame (7.6), and the input end bevel gear of the clamping bevel gear (7.8) is fixedly mounted on the clamping torsion bar (7.7). The output end of the clamping bevel gear (7.8) is fixedly mounted on one end of the clamping threaded rod (7.9), the clamping threaded rod (7.9) is rotatably mounted on a rotating rod seat (7.10), the base of the rotating rod seat (7.10) is fixedly mounted on both sides of the chassis (2), one end of the connecting block (7.11) is fixedly mounted on the clamping slide plate (7.3), and the other end of the connecting block (7.11) is threadedly sleeved on the other end of the clamping threaded rod (7.9).

8. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 1, characterized in that: The docking assembly (8) further comprises a connecting plate (8.3), a docking slide groove (8.4) and a travel groove (8.5), wherein one end of the connecting plate (8.3) is fixedly mounted on two sides of the chassis (2), the other end of the connecting plate (8.3) is fixedly mounted on the docking plate (8.1), the docking slide groove (8.4) is arranged on the docking plate (8.1), and the travel groove (8.5) is arranged on the docking plate (8.1).

9. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 8, characterized in that: The docking assembly (8) further comprises a clamping motor (8.6), a clamping bevel gear set (8.7), a clamping gear pair (8.8), a clamping threaded rod (8.9) and a clamping slide block (8.10), wherein the base of the clamping motor (8.6) is fixedly mounted on the chassis (2), the input end bevel gear of the clamping bevel gear set (8.7) is fixedly mounted on the rotating shaft of the clamping motor (8.6), and the output end bevel gear of the clamping bevel gear set (8.7) is fixedly mounted on the wheel shaft Installed on the clamping gear pair (8.8), one end of the clamping threaded rod (8.9) is fixedly installed on the clamping gear pair (8.8), the clamping slider (8.10) is fixedly installed on the guide plate (8.2), the clamping slider (8.10) is slidably installed in the docking slide groove (8.4), the clamping slider (8.10) is threadedly sleeved on the other end of the clamping threaded rod (8.9), and the clamping threaded rod (8.9) is rotatably installed in the docking plate (8.1).

10. The high-strength 3D printing material pelletizing and preparation device based on polylactic acid according to claim 9, characterized in that: The docking assembly (8) further comprises a docking motor (8.11), a first docking bevel gear set (8.12), a docking gear pair (8.13), an angular column (8.14), a gear rack (8.15), a second docking bevel gear set (8.16), a transmission rod (8.17) and a docking pressure wheel (8.18), wherein the base of the docking motor (8.11) is fixedly mounted on the chassis (2), the input end bevel gear of the first docking bevel gear set (8.12) is fixedly mounted on the rotating shaft of the docking motor (8.11), the output end bevel gear axle of the first docking bevel gear set (8.12) is fixedly mounted on the docking gear pair (8.13), one end of the angular column (8.14) is fixedly mounted on the rotating shaft of the docking motor (8.11), and the output end bevel gear axle of the first docking bevel gear set (8.12) is fixedly mounted on the docking gear pair (8.13). The gear rack (8.15) is slidably sleeved on the angular column (8.14); the input end bevel gear of the second docking bevel gear set (8.16) is slidably sleeved on the angular column (8.14); the output end bevel gear of the second docking bevel gear set (8.16) is fixedly mounted on one end of a transmission rod (8.17); the transmission rod (8.17) is rotatably mounted on the gear rack (8.15); the other end of the transmission rod (8.17) is rotatably inserted into the guide plate (8.2); and the docking pressure wheel (8.18) is fixedly mounted on the transmission rod (8.17).

Images