A cutting machine for nylon production

Abstract

The utility model relates to nylon production granulating technology field, concretely relates to a granulator for nylon production, include: cutting table, conveying mechanism, cutting mechanism are installed on cutting table in turn along material flow direction, the utility model discloses a kind of granulator for new nylon production, by setting dredging component, by the directional airflow injection of rotary nozzle, in roll cutter operating area construction local cooling field, effectively eliminate the residual thermal stress inside particle, avoid the melting bonding phenomenon between particles due to thermoplastic material characteristics, simultaneously, during the rotation of rotating rod, the abutting block cam structure configured to its surface and the protrusion of the bottom of shaking plate occur periodic contact, the reciprocating vibration of shaking plate is realized by cam-spring composite mechanism, the vibration effect makes the nylon particles accumulated on the surface of shaking plate obtain initial kinetic energy, under the coupling action of gravity and vibration, along the orderly flow of the surface of pre-set inclination angle, effectively prevent bridging and adhesion phenomenon of particle in the process of collecting material.

Description

Technical Field

[0001] This utility model relates to the field of nylon pelletizing technology, specifically to a pelletizer for nylon production. Background Technology

[0002] Nylon, chemically known as polyamide (PA), is a type of polymer containing amide groups in its main chain. It is produced by the condensation polymerization of diamines and diacids or the ring-opening polymerization of lactams. It possesses excellent properties such as high strength, wear resistance, and chemical corrosion resistance, and is widely used in the automotive, electronics, machinery, and textile industries. As a core engineering plastic, its production process requires pelleting to transform the molten polymer into uniform particles to meet subsequent processing requirements.

[0003] Patent application CN202420508150.2 discloses a pelletizer for nylon 66, comprising a square tube with a vertically fixed support leg on its bottom surface. A feeding component is located on the inner wall of the lower end of the square tube, and a pressing component is located directly above the feeding component. The pressing component is vertically connected inside the square tube, and a cutting component is located at the outlet end of the square tube. An inclined guide plate is fixedly connected to the outlet end of the cutting component. This invention, by setting a feeding component inside the square tube and a pressing component vertically connected inside the square tube above the feeding component, achieves automatic feeding of strip-shaped nylon 66. It also facilitates the simultaneous feeding and pelletizing of multiple strip-shaped nylon 66, reducing the workload of operators and increasing the pelletizing efficiency of the equipment.

[0004] However, this patent cannot effectively guide and discharge the cut particles, which tend to accumulate near the cutting blade, thus causing the particles to stick together again after cutting.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this utility model is to provide a nylon pelletizer that can effectively solve the above-mentioned technical problems.

[0007] To achieve the purpose of this utility model, the following technical solution is adopted:

[0008] A pelletizer for nylon production includes: a cutting table, a conveying mechanism and a cutting mechanism that are sequentially installed on the cutting table in the direction of material flow;

[0009] The cutting mechanism includes: a roller blade rotatably mounted on the cutting table, a gear one coaxially fixedly mounted on one side of the roller blade, a gear two meshing with the gear one, a push roller coaxially fixedly connected to the gear two, a main gear fixedly mounted on one side of the gear two, a drive motor that drives the main gear to rotate; and a guide component that guides the cut granular material to feed as the main gear rotates; the push roller is rotatably mounted below the roller blade.

[0010] Furthermore, the guiding component includes: a third gear meshing with the main gear, a rotating rod coaxially and fixedly connected to the third gear, and a nozzle fixedly mounted on the rotating rod; the nozzle is connected to an external air pump; the rotating rod is rotatably mounted on a cutting table on one side of the roller cutter.

[0011] Furthermore, an abutment block is fixedly installed on the rotating rod, and a shaking plate is elastically installed below the roller cutter by a spring; the shaking plate is provided with a protrusion that abuts against the abutment block as it rotates.

[0012] Furthermore, the shaking plate is inclined and positioned below the roller cutter.

[0013] Furthermore, the conveying mechanism includes: an upper conveying roller and a lower conveying roller rotatably mounted on the cutting table; a fourth gear fixedly connected to the upper conveying roller; and a fifth gear fixedly connected to the lower conveying roller; the fifth gear meshes with the fourth gear; the fourth gear meshes with the main gear; and the upper and lower conveying rollers are respectively provided with arc grooves.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This novel nylon pelletizer for production utilizes a guiding component to create a localized cooling zone in the roller cutter operating area through directional airflow from a rotating nozzle. This effectively eliminates residual thermal stress within the pellets and prevents melting and adhesion between pellets due to the properties of thermoplastic materials. Simultaneously, during the rotation of the rotating rod, the cam structure of the contact block on its surface periodically contacts the protrusions at the bottom of the shaking plate. The cam-spring composite mechanism enables the shaking plate to reciprocate and vibrate. This vibration effect gives the nylon pellets accumulated on the surface of the shaking plate initial kinetic energy, allowing them to flow orderly along the plate surface at a preset tilt angle under the coupling of gravity and vibration. This effectively prevents bridging and adhesion of pellets during the collection process. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the structure of a nylon pelletizer for production according to the present invention;

[0018] Figure 2 This is a schematic diagram of the conveying mechanism in this utility model;

[0019] Figure 3 This is a schematic diagram of the cutting mechanism in this utility model;

[0020] Figure 4 This is a schematic diagram of the dredging component in this utility model;

[0021] Figure 5 This is a cross-sectional view of the drainage component in this utility model.

[0022] In the diagram: 1. Cutting table; 2. Conveying mechanism; 3. Cutting mechanism; 31. Roller cutter; 32. Gear 1; 33. Gear 2; 34. Propulsion roller; 35. Main gear; 36. Guiding component; 361. Gear 3; 362. Rotating rod; 363. Nozzle; 364. Abutment block; 365. Spring; 366. Shaking plate; 367. Protrusion; 21. Upper conveying roller; 22. Lower conveying roller; 23. Gear 4; 24. Gear 5; 25. Arc groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0025] like Figures 1 to 5As shown, a pelletizer for nylon production includes: a cutting table 1, a conveying mechanism 2 and a cutting mechanism 3, which are sequentially installed on the cutting table 1 in the direction of material flow.

[0026] The conveying mechanism 2 includes: an upper conveying roller 21 and a lower conveying roller 22 rotatably mounted on the cutting table 1; a gear 23 fixedly connected to the upper conveying roller 21; and a gear 24 fixedly connected to the lower conveying roller 22; the gear 24 meshes with the gear 23; the gear 23 meshes with the main gear 35; and the upper conveying roller 21 and the lower conveying roller 22 are respectively provided with arc grooves 25.

[0027] The device described in this application needs to be used in conjunction with an extruder and a cooling water tank. In the specific process flow, the extruder heats and melts the nylon raw material, and then extrudes it into a continuous strip material through a specific die. The extruded nylon strip then enters the cooling water tank for cooling and shaping. After the cooling process is completed, the nylon strip is conveyed to the designated position on the cutting table 1.

[0028] At this time, the drive motor starts running, and its output shaft drives the main gear 35 to rotate synchronously. Based on the gear transmission principle, the main gear 35 meshes with the drive gear 23 and the drive gear 24 in sequence, thereby driving the upper conveyor roller 21 and the lower conveyor roller 22, which are rotatably mounted on the cutting table 1, to achieve synchronous rotation. The operator places the cooled and shaped nylon strip between the upper and lower conveyor rollers 22, and the synchronous rolling of the two rollers achieves the directional and orderly conveying of the nylon strip.

[0029] To improve conveying efficiency and stability, both the upper and lower conveying rollers 22 are equipped with multi-segment arc-shaped groove structures. This structural design allows for the parallel placement of multiple sets of nylon strips. The arc-shaped grooves effectively constrain the axial movement of the nylon strips during conveying, ensuring the continuity and stability of material conveying. This technical solution, through its multi-station parallel conveying and cutting process design, significantly reduces the labor intensity of operators while greatly improving the overall production efficiency of nylon strip pelletizing operations.

[0030] It should be noted that the extruder and cooling water tank described in this application are both industry-standard equipment, and their specific structures and working principles are within the scope of existing technology, so they will not be described in detail in this technical solution.

[0031] The cutting mechanism 3 includes: a roller cutter 31 rotatably mounted on the cutting table 1; a gear 32 coaxially fixedly mounted on one side of the roller cutter 31; a gear 33 meshing with the gear 32; a push roller 34 coaxially fixedly connected to the gear 33; a main gear 35 fixedly mounted on one side of the gear 33; a drive motor that drives the main gear 35 to rotate; and a guide assembly 36 that guides the cut granular material to feed as the main gear 35 rotates; the push roller 34 is rotatably mounted below the roller cutter 31.

[0032] The nylon strip, compressed and conveyed by the upper and lower conveyor rollers 22, is guided to the working position of the roller cutter 31. At this time, the drive motor starts running, and its output shaft drives the main gear 35 to rotate on a fixed axis. Based on the gear meshing transmission principle, the main gear 35 sequentially drives the second gear 33 and the first gear 32 to rotate synchronously.

[0033] Driven by the active rotation of the feed roller 34, the nylon strip is continuously fed into the cutting gap area formed by the roller cutter 31 and the feed roller 34. Driven by the transmission system, the roller cutter 31 rotates at high speed, forming a shearing force field with the feed roller 34 to continuously granulate the nylon strip. During the cutting process, the blade of the roller cutter 31 and the roller surface of the feed roller 34 work together to ensure that the nylon strip is uniformly cut into granular materials of the set specifications.

[0034] The cut granular material is directionally thrown to the collection device area behind the roller cutter 31 by the centrifugal force generated by the rotation of the roller cutter 31 and the conveying action of the push roller 34.

[0035] The guiding component 36 includes: a gear 361 meshing with the main gear 35, a rotating rod 362 coaxially and fixedly connected to the gear 361, and a nozzle 363 fixedly installed on the rotating rod 362; the nozzle 363 is connected to an external air pump; the rotating rod 362 is rotatably installed on a cutting table 1 on one side of the roller cutter 31; an abutment block 364 is also fixedly installed on the rotating rod 362, and a shaking plate 366 elastically installed below the roller cutter 31 by a spring 365; the shaking plate 366 is provided with a protrusion 367 that abuts against the abutment block 364 as it rotates; the shaking plate 366 is inclinedly arranged below the roller cutter 31.

[0036] After the roller cutter 31 completes the pelletizing of the nylon strip, the resulting nylon pellets are thrown into the pre-set working area of ​​the shaking plate 366 under the action of the centrifugal force field of the roller cutter 31. During the continuous operation of the drive motor, its output shaft synchronously drives the gear three 361 to perform a fixed-axis rotational motion through the main gear 35. The gear three 361 drives the rotating rod 362 to rotate circumferentially, and the rotating nozzle 363 configured on the rotating rod 362 moves synchronously with the rotating rod 362, forming a dynamic spraying trajectory in three-dimensional space.

[0037] A localized cooling zone is created in the working area of ​​the roller cutter 31 by the directional airflow jet from the rotating nozzle 363. The nozzle 363 is positioned at an optimized lateral position on the roller cutter 31, utilizing the turbulent diffusion effect of the airflow to maximize the heat exchange area between the surface of the cut nylon particles and the cold source, effectively eliminating residual thermal stress within the particles and preventing melting and adhesion between particles due to the properties of thermoplastic materials. Secondly, when the nozzle 363 rotates to a position opposite the blade face of the roller cutter 31, the high-pressure airflow can perform pulsed purging on the surface of the roller cutter 31, using a pneumatic peeling effect to remove nylon residue adhering to the blade surface, ensuring the continuous operational accuracy of the cutting system.

[0038] Simultaneously, during the rotation of the rotating rod 362, the cam structure of the abutment block 364 on its surface periodically contacts the protrusion at the bottom of the shaking plate 366, achieving reciprocating vibration of the shaking plate 366 through the cam-spring composite mechanism 365. Specifically, when the protrusion 367 end of the abutment block 364 contacts the protrusion, the shaking plate 366 overcomes the preload of the spring 365 under the action of the contact force, generating directional displacement; when the contact is released, the energy stored in the spring 365 is released, pushing the shaking plate 366 to reset, forming high-frequency, low-amplitude vibration. This vibration effect allows the nylon particles accumulated on the surface of the shaking plate 366 to gain initial kinetic energy, flowing orderly along the plate surface at a preset tilt angle under the coupling effect of gravity and vibration, effectively preventing bridging and adhesion of particles during the collection process.

[0039] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

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