A plastic particle production equipment and method

Abstract

This invention relates to the field of plastic pellet production technology and discloses a plastic pellet production equipment and method. The plastic pellet production equipment includes a worktable, on which an extrusion device, a mold, a cooling device, a housing, and a pelletizer are sequentially arranged. The cooling device includes a cooling pool on the worktable, on which several feeding rollers are arranged. After the raw material is extruded and molded by the extrusion device and the mold to generate several PBT filaments, the several feeding rollers transport the PBT filaments through the housing to the pelletizer. Several automatic straightening mechanisms are arranged on the housing. The plastic pellet production equipment and method add an automatic straightening mechanism between the feeding rollers and the pelletizer. Based on whether the PBT filaments are tilted in a certain direction and according to the specific tilt degree, different numbers of straightening rollers in that direction are triggered to flexibly straighten the PBT filaments, thereby reducing the problem of thin and long PBT plastic pellets.

Description

Technical Field

[0001] This invention relates to the field of plastic particle production technology, specifically to a plastic particle production equipment and method. Background Technology

[0002] Plastic pellets, also known as plastic granules, are raw materials for plastic processing. Various plastic products are obtained by processing plastic pellets through injection molding, blow molding, and other manufacturing processes. For example, PBT plastic pellets are an important thermoplastic polyester widely used in industries such as electrical appliances, automobiles, aircraft manufacturing, communications, home appliances, and transportation.

[0003] PBT plastic particles are typically prepared by mixing and melting a viscous PBT plastic polymer through processes such as transesterification or direct esterification polycondensation. The polymer is then extruded under pressure through a die to form PBT filaments. After further cooling and molding, the PBT filaments are cut into plastic particles by a pelletizer.

[0004] During the pelletizing process, various operating errors can cause quality problems in PBT plastic pellets, such as pellet sticking, tailing, shrinkage voids, and thin strips. Among these, thin strips refer to PBT plastic pellets that are longer than the standard pellet size range. The reason for thin strips is poor control of the PBT wire feed attitude when feeding it into the pelletizer cutter. Specifically, the PBT wire is not at a vertical angle when fed into the pelletizer cutter, so the end of the PBT wire will have a tilted angle during cutting.

[0005] In existing technology, the distance between the feed roller and the cutter is called the feed distance. Within this span, there is nothing to control the PBT wire. If the feed roller is not installed correctly or the operating conditions are poor, the PBT wire will tilt. Furthermore, rigid straightening methods are generally unsuitable for PBT wire. Due to the nature of PBT wire, if straightening rollers or other equipment are used to fix and straighten it, it will create significant resistance to the conveying of the PBT wire and increase wear on the wire.

[0006] Therefore, it is necessary to propose a plastic particle production equipment and method to solve the technical problems existing in the prior art. Summary of the Invention

[0007] This invention provides a plastic pellet production equipment and method, which includes an automatic straightening mechanism added between the feed roller and the pelletizer. The mechanism triggers a different number of straightening rollers in a certain direction to flexibly straighten the PBT pellets based on whether the PBT pellets are tilted in a certain direction and the specific degree of tilt. This reduces the occurrence of long and thin PBT pellets and solves the problems mentioned in the background art.

[0008] The present invention provides the following technical solution: a plastic particle production equipment, including a workbench, on which an extrusion device, a mold, a cooling device, a shell and a pelletizer are arranged in sequence; the cooling device includes a cooling pool arranged on the workbench, and a plurality of feeding rollers are arranged on the cooling pool.

[0009] After the raw material is extruded and molded into several PBT wires by the extrusion device and the mold, the PBT wires are conveyed through the housing to the pelletizer by the feeding rollers.

[0010] The housing is provided with several automatic straightening mechanisms for straightening several PBT wires. The automatic straightening mechanism includes several detection components and several straightening components arranged circumferentially on the housing. The detection components are used to detect the tilt of the PBT wires, and the straightening components are used to straighten the PBT wires.

[0011] As an optional solution to the plastic particle production equipment of the present invention, the automatic straightening mechanism further includes a mounting ring disposed on the housing, and the PBT wire passes through the center of the mounting ring;

[0012] The detection component includes a rotating shaft rotatably mounted on the mounting ring, a touch plate mounted on the rotating shaft, and the touch plate being elastically connected to the mounting ring via a first spring.

[0013] As an optional solution of the plastic particle production equipment of the present invention, the straightening component includes a slide block slidably disposed in the housing, a straightening wheel rotatably disposed on the slide block, and a motor disposed on the slide block, wherein the output shaft of the motor is coaxially connected to the straightening wheel.

[0014] The automatic straightening mechanism also includes several drive components, which are used to drive several straightening wheels to rotate and move towards the PBT wire.

[0015] As an optional embodiment of the plastic particle production equipment described in this invention, the plurality of straightening components and the plurality of driving components are arranged linearly along the conveying direction of the PBT wire, in addition to being arranged circumferentially based on the PBT wire material.

[0016] As an optional embodiment of the plastic particle production equipment of the present invention, the driving component includes a sliding rheostat and an electromagnet disposed within the housing, the motor and the electromagnet are electrically connected to the sliding rheostat via wires, and the slide is elastically connected to the housing via a second spring.

[0017] As an optional solution of the plastic particle production equipment of the present invention, the sliding rheostat includes a ceramic shell disposed in the housing, and a sliding plate is slidably disposed on the ceramic shell;

[0018] The driving component further includes a sliding component, the sliding component including a mounting groove formed on the slide plate, and a first trapezoidal block is slidably disposed in the mounting groove;

[0019] The automatic straightening mechanism further includes several triggering components connected to several of the touch plates respectively. Each triggering component includes a first rotating rod rotatably disposed within the housing, a first gear disposed on the first rotating rod, a first rack slidably disposed within the housing, the first rack meshing with the first gear, and a second trapezoidal block disposed on the first rack, the second trapezoidal block engaging with the inclined surface of the first trapezoidal block.

[0020] As an optional solution of the plastic particle production equipment of the present invention, the sliding component further includes a third spring, the first trapezoidal block is elastically connected to the inner wall of the mounting groove through the third spring, a limit rod is provided on the first trapezoidal block, an L-shaped sliding groove is provided in the housing, and the limit rod is slidably connected in the L-shaped sliding groove.

[0021] As an optional embodiment of the plastic particle production equipment of the present invention, the triggering component further includes a transmission component for connecting the touch plate and the first rotating rod, and the transmission component includes a first transmission rod disposed on the touch plate;

[0022] A second rack is slidably disposed inside the housing, a second transmission rod is disposed on the second rack, a straight groove is formed on the second transmission rod, and a slide rod is disposed on the first transmission rod, the slide rod being slidably connected to the straight groove.

[0023] As an optional embodiment of the plastic particle production equipment described in this invention, the transmission assembly further includes a second rotating rod rotatably disposed within the housing, the second rotating rod being provided with a second gear, the first rotating rod being provided with a third gear, the second rack and the third gear both meshing with the second gear, and the number of teeth of the second gear being greater than the number of teeth of the third gear.

[0024] This invention also provides the following technical solution: a production method for a plastic particle production device, comprising the following steps:

[0025] S1. After the raw materials for preparing PBT plastic particles are put into the extrusion device, the extrusion device runs and is extruded through the die to produce several PBT wires. The several PBT wires are first conveyed by several feeding rollers and cooled in the cooling pool before being conveyed through several mounting rings.

[0026] S2. When the PBT wire passes through the mounting ring, if the PBT wire tilts at a certain angle in a certain direction, it will trigger the touch plate in that direction to rotate at a certain angle according to the tilt angle of the PBT wire. The triggering component connected to the touch plate will trigger a certain number of sliders to slide according to the rotation angle of the touch plate, so that the current flowing through a certain number of electromagnets decreases and a certain number of straightening wheels are displaced towards the PBT wire. At the same time, the current flowing through a certain number of motors increases, driving a certain number of straightening wheels to rotate in the same direction as the PBT wire conveying direction to approach the PBT wire for straightening.

[0027] S3. After straightening, several PBT wires are finally fed into the pelletizer by several feed rollers. The pelletizer cuts the PBT wires into PBT plastic particles.

[0028] The present invention has the following beneficial effects:

[0029] 1. In this plastic pellet production equipment and method, before the feed rollers send PBT filaments into the pelletizer for pelletizing, several automatic straightening mechanisms are set up to automatically straighten several PBT filaments. First, several contact plates forming a ring detect the tilt of the PBT filaments. When the PBT filaments are not tilted, the automatic straightening mechanisms will not be triggered to straighten them, thus avoiding resistance that affects conveying and causing wear.

[0030] When PBT filament tilts in a certain direction due to various operating conditions, it pushes the touch plate in that direction to rotate. This, in turn, triggers the drive assembly to move the straightening roller in that direction towards the PBT filament through elastic support, flexibly straightening it. The drive assembly also drives the straightening roller to rotate at a speed close to the PBT filament's feeding speed and in the same direction as the PBT filament's feeding direction, further reducing wear on the PBT filament. This ensures that the PBT filament is fed into the pelletizer at a relatively perpendicular angle, thereby reducing the problem of long, thin strips of PBT plastic particles.

[0031] 2. This plastic particle production equipment and method, in addition to precisely triggering straightening in the direction of the PBT filament's inclination, also triggers different numbers of straightening rollers in that direction to straighten the PBT filament to varying degrees based on the specific angle of inclination. This allows for intelligent straightening of the PBT filament according to the working conditions.

[0032] 3. The plastic particle production equipment and method uses a two-circuit structure for the drive component that drives the straightening wheel for straightening, which is controlled by the sliding plate in the sliding rheostat. Therefore, the rotational resistance of the touch plate can be set to be small, and the rotational and meshing resistances of the trigger component transmission process can be set to be small, thereby further reducing the resistance encountered by the PBT wire when it drives the touch plate to rotate and reducing wear. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 This is a first partial cross-sectional view of the housing of the present invention.

[0035] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0036] Figure 4 This is a schematic diagram of a second partial cross-sectional structure of the housing of the present invention.

[0037] Figure 5 This is a schematic diagram of the third partial cross-sectional structure of the housing of the present invention.

[0038] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0039] Figure 7 This is a schematic diagram of the automatic straightening mechanism of the present invention.

[0040] Figure 8 This is a schematic diagram of the exploded structure of the detection component of the present invention.

[0041] Figure 9 This is an exploded structural diagram of the straightening component of the present invention.

[0042] In the diagram: 100, PBT wire rod; 200, worktable; 300, extrusion unit; 310, twin-screw extruder body; 320, feed inlet; 330, discharge outlet; 400, die; 500, cooling device; 510, cooling pool; 520, feed roller; 600, housing; 700, pelletizer; 800, automatic straightening mechanism; 810, mounting ring; 820, detection component; 821, rotating shaft; 822, touch plate; 823, first spring; 830, straightening component; 831, slide; 832, straightening wheel; 833, motor; 840, trigger component; 841, first rotating rod; 842, first gear; 843, first rack; 84 4. Second trapezoidal block; 845. Transmission assembly; 8451. First transmission rod; 8452. Second rack; 8453. Second transmission rod; 8454. Linear slide groove; 8455. Slide rod; 8456. Second rotating rod; 8457. Second gear; 8458. Third gear; 850. Drive assembly; 851. Sliding rheostat; 8511. Ceramic housing; 8512. Sliding plate; 8513. Terminal; 8514. Metal rod; 852. Electromagnet; 853. Second spring; 854. Sliding assembly; 8541. Mounting groove; 8542. First trapezoidal block; 8543. Third spring; 8544. Limiting rod; 8545. L-shaped slide groove. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1

[0045] In existing PBT plastic pellet production processes, when the PBT wire 100 is conveyed into the pelletizer 700 via the feed roller 520, various operating conditions may cause the PBT wire 100 to tilt, resulting in thin, elongated strips of PBT plastic pellets. Conventional straightening methods are not suitable for the PBT wire 100. If straightening rollers 832 are installed to fix and straighten all PBT wires 100, it will create significant resistance to the conveying of the PBT wires 100 and cause considerable wear. Therefore, to solve the above problems, Embodiment 1 is proposed.

[0046] Please see Figures 1-9A plastic pellet production equipment includes a workbench 200, on which an extrusion device 300, a mold 400, a cooling device 500, a housing 600 and a pelletizer 700 are arranged in sequence. The cooling device 500 includes a cooling pool 510 arranged on the workbench 200, and a plurality of feeding rollers 520 are arranged on the cooling pool 510.

[0047] The extrusion device 300 includes a twin-screw extruder body 310, on which a feed inlet 320 and a discharge outlet 330 are provided;

[0048] After the raw material is extruded and molded by the extrusion device 300 and the mold 400 to generate several PBT wires 100, the PBT wires 100 are conveyed through the housing 600 to the pelletizer 700 by several feeding rollers 520.

[0049] The housing 600 is provided with a plurality of automatic straightening mechanisms 800 for straightening a plurality of PBT wires 100. The automatic straightening mechanism 800 includes a plurality of detection components 820 and a plurality of straightening components 830 arranged circumferentially on the housing 600. The detection components 820 are used to detect the tilt of the PBT wires 100, and the straightening components 830 are used to straighten the PBT wires 100.

[0050] The automatic straightening mechanism 800 also includes a mounting ring 810 disposed on the housing 600, through which the PBT wire 100 passes;

[0051] The detection component 820 includes a rotating shaft 821 rotatably mounted on a mounting ring 810, a touch plate 822 mounted on the rotating shaft 821, and the touch plate 822 being elastically connected to the mounting ring 810 via a first spring 823.

[0052] The straightening assembly 830 includes a slide block 831 slidably disposed within the housing 600, a straightening wheel 832 rotatably disposed on the slide block 831, and a motor 833 disposed on the slide block 831, with the output shaft of the motor 833 coaxially connected to the straightening wheel 832.

[0053] The automatic straightening mechanism 800 also includes several drive components 850, which are used to drive several straightening wheels 832 to move towards the PBT wire 100 while rotating.

[0054] In addition to being arranged circumferentially based on the PBT wire 100, the straightening components 830 and the drive components 850 are also arranged linearly along the conveying direction of the PBT wire 100.

[0055] In this embodiment: First, viscous PBT polymer is fed into the feed inlet 320 as raw material. The twin-screw extruder body 310 runs to mix and melt the raw material. Finally, the raw material is initially formed into PBT wire 100 through several die holes on the die 400 and then conveyed into the cooling tank 510 by the rightmost feed roller 520. It is cooled and shaped by the cooling water in the cooling tank 510 and finally conveyed out through the leftmost feed roller 520 and entered the pelletizer 700 for cutting and shaping.

[0056] Before the PBT wire 100 is fed into the pelletizer 700, a housing 600 is set between the cooling pool 510 and the pelletizer 700. The housing 600 has several automatic straightening mechanisms 800, each corresponding to a number of PBT wires 100.

[0057] When the PBT wire 100 passes through the mounting ring 810, if the PBT wire 100 does not tilt beyond the standard range, it will not contact several touch plates 822. If the PBT wire 100 tilts in a certain direction, it will contact the touch plate 822 in that direction, causing it to rotate based on the pivot 821. The first spring 823 serves to reset the touch plate 822. When the PBT wire 100 is no longer tilted, the touch plate 822 will reset. Furthermore, the elastic force of the first spring 823 is relatively small, so the touch plate 822 can be pushed by a small force, without causing excessive resistance and wear to the PBT wire 100.

[0058] Within the housing 600, several straightening components 830 and several driving components 850 are circumferentially arranged, corresponding to several touch plates 822. When one of the touch plates 822 tilts, it triggers the driving component 850 in the corresponding direction, causing the motor 833 in the corresponding direction to run. This causes the straightening wheel 832 to rotate in the same direction as the PBT wire 100 and contact the PBT wire 100. The straightening is then flexibly achieved by the elastic force of the second spring 853, and the rotation speed of the straightening wheel 832 is made as consistent as possible with the conveying speed of the PBT wire 100, thereby reducing wear on the PBT wire 100 during the straightening process.

[0059] In addition to one group arranged circumferentially around the PBT wire 100, several other groups of drive components 850 and straightening components 830 are linearly arranged along the conveying direction of the PBT wire 100. The degree of straightening of the PBT wire 100 is determined by rotating the touch plate 822 at different angles to control the tilt of the PBT wire 100, thereby controlling the number of straightening wheels 832 driven in that direction to straighten the PBT wire 100.

[0060] It should be noted that the surface of the feed roller 520 has grooves that are compatible with the PBT wire 100 for easy feeding, and several feed rollers 520 can be driven by a motor or other drive equipment.

[0061] The number of PBT wire 100, feed roller 520, straightening assembly 830 and drive assembly 850 shown in the illustration does not represent the actual number used in production. In actual production, the mold 400 extrudes a large number of PBT wire 100s at one time. The number of feed rollers 520 can be increased to gradually change the conveying direction of PBT wire 100, taking into account the material of PBT wire 100. The straightening assembly 830 and drive assembly 850 can also be set in more groups in the linear direction.

[0062] In addition, the twin-screw extruder body 310, feed roller 520, pelletizer 700, etc. are conventional existing technologies, and their specific structures and working principles will not be described in detail.

[0063] Example 2

[0064] Example 2 is proposed to drive the straightening wheel 832 to rotate while displacing towards the PBT wire 100;

[0065] This embodiment is an improvement upon Embodiment 1. For details, please refer to [link / reference]. Figures 2-9 The drive assembly 850 includes a sliding rheostat 851 and an electromagnet 852 disposed in the housing 600. The motor 833 and the electromagnet 852 are electrically connected to the sliding rheostat 851 through wires. The slide block 831 is elastically connected to the housing 600 through a second spring 853.

[0066] The sliding rheostat 851 includes a ceramic housing 8511 disposed within the housing 600, a slider 8512 slidably disposed on the ceramic housing 8511, a terminal block 8513 and a metal rod 8514 disposed on the ceramic housing 8511, and an insulating wire sleeved on the terminal block 8513.

[0067] In this embodiment: as Figure 7 and Figure 9 The ceramic housing 8511 shown has four connection points: a, b, c, and d. The negative power supply is connected to point c via a wire, point a is connected to motor 833 via a wire, and motor 833 is connected to the positive power supply via a wire. The negative power supply is connected to point d via a wire, point b is connected to electromagnet 852 via a wire, and electromagnet 852 is connected to the positive power supply via a wire. The slide block 831 is made of metal, while the remaining structures within the housing 600 can be made of non-metallic materials.

[0068] When the slider 8512 is on the ceramic housing 8511 near the right side, the electromagnet 852 has a larger current flowing through it, which generates a larger attraction force on the slider 831, resisting the elastic force of the second spring 853, so that the slider 831 and the straightening wheel 832 are close to the housing 600 and do not come into contact with the PBT wire 100. Meanwhile, the motor 833 has a smaller current flowing through it.

[0069] Rotating the touch plate 822 causes the slider 8512 to slide to the left on the ceramic housing 8511, which reduces the current of the electromagnet 852 and weakens the attraction. The slide block 831 moves towards the PBT wire 100 under the elastic force of the second spring 853, while the current of the motor 833 increases, driving the straightening wheel 832 to rotate at a speed close to that of the PBT wire 100.

[0070] It should be noted that the sliding rheostat 851 is a conventional existing technology, and its specific structure and working principle will not be described in detail.

[0071] Example 3

[0072] To trigger the slider 8512 to slide to the left, stay on the left side, and reset to the right side after the touch plate 822 is reset, so that the straightening wheel 832 is disengaged from the PBT wire 100, this is Example 3;

[0073] This embodiment is an improvement upon embodiment 2. For details, please refer to [link / reference]. Figures 4-9 The drive assembly 850 also includes a sliding assembly 854, which includes a mounting groove 8541 opened on the slide plate 8512, and a first trapezoidal block 8542 is slidably disposed in the mounting groove 8541.

[0074] The automatic straightening mechanism 800 also includes several trigger components 840 that are respectively connected to several touch plates 822. Each trigger component 840 includes a first rotating rod 841 rotatably disposed within the housing 600, a first gear 842 disposed on the first rotating rod 841, a first rack 843 slidably disposed within the housing 600, the first rack 843 meshing with the first gear 842, and a second trapezoidal block 844 disposed on the first rack 843, and the second trapezoidal block 844 engaging with the inclined surface of the first trapezoidal block 8542.

[0075] The sliding assembly 854 also includes a third spring 8543. The first trapezoidal block 8542 is elastically connected to the inner wall of the mounting groove 8541 through the third spring 8543. A limit rod 8544 is provided on the first trapezoidal block 8542. An L-shaped slide groove 8545 is provided in the housing 600. The limit rod 8544 is slidably connected in the L-shaped slide groove 8545.

[0076] In this embodiment: the rotation of the first rotating rod 841 drives the first gear 842 to rotate, which in turn drives the first rack 843 and the second trapezoidal block 844 to move to the left. The inclined surface of the second trapezoidal block 844 matches the inclined surface of the first trapezoidal block 8542. At this time, the limiting rod 8544 is in the left-right direction section of the L-shaped slide groove 8545, so the limiting rod 8544 will not move forward. At this time, the second trapezoidal block 844 will drive the slider 8512 to move to the left. When the slider 8512 moves to the leftmost position, the limiting rod 8544 slides to the front-back direction section of the L-shaped slide groove 8545. At this time, the second trapezoidal block 844 continues to move to the left, which will cause the limiting rod 8544 to move backward, causing the first trapezoidal block 8542 to disengage from the second trapezoidal block 844. Then, it resets under the elastic force of the third spring 8543. When the touch plate 822 resets and causes the second trapezoidal block 844 to return to the right, the second trapezoidal block 844 is in contact with the right-angle end of the sliding component 854 at this time, and will not push the limit rod 8544 to move forward, thereby pushing the slider 8512 to the right to reset.

[0077] As the second trapezoidal block 844 continues to move to the left, it will push a certain number of sliders 8512 in sequence, causing a certain number of drive components 850 to run.

[0078] Example 4

[0079] To enable the touch plate 822 to trigger the first rack 843 and the second trapezoidal block 844 to move different distances according to the rotation angle, and to make the transmission of the touch plate 822 less effort and not cause great wear to the PBT wire 100, Embodiment 4 is proposed.

[0080] This embodiment is an improvement upon embodiment 3. For details, please refer to [link / reference]. Figures 2-9 The trigger assembly 840 also includes a transmission assembly 845 for connecting the trigger plate 822 and the first rotating rod 841. The transmission assembly 845 includes a first transmission rod 8451 disposed on the trigger plate 822.

[0081] A second rack 8452 is slidably disposed inside the housing 600. A second transmission rod 8453 is disposed on the second rack 8452. A straight slide groove 8454 is provided on the second transmission rod 8453. A slide rod 8455 is disposed on the first transmission rod 8451. The slide rod 8455 is slidably connected to the straight slide groove 8454.

[0082] The transmission assembly 845 also includes a second rotating rod 8456 rotatably disposed within the housing 600. A second gear 8457 is disposed on the second rotating rod 8456, and a third gear 8458 is disposed on the first rotating rod 841. Both the second rack 8452 and the third gear 8458 mesh with the second gear 8457, and the number of teeth of the second gear 8457 is greater than the number of teeth of the third gear 8458.

[0083] In this embodiment: the rotation of the touch plate 822 drives the first transmission rod 8451 to deflect to the right, and the slide rod 8455 slides in the linear slide groove 8454, driving the second transmission rod 8453 and the second rack 8452 to move to the right, so that the second rotating rod 8456 and the second gear 8457 rotate. The transmission ratio between the second gear 8457 and the third gear 8458 is large, so that the third gear 8458 and the first rotating rod 841 rotate at a large speed. The first gear 842 will drive the first rack 843 to move forward a large distance, which will increase the transmission ratio.

[0084] Furthermore, the transmission process of the trigger component 840 and the sliding process of the slider 8512 can be set to a high degree of smoothness, so that the PBT wire 100 will not experience greater resistance and wear due to the rotation of the touch plate 822.

[0085] Example 5

[0086] Please see Figures 1-9 A method for producing plastic particles using a production equipment includes the following steps:

[0087] S1. After the raw material for preparing PBT plastic particles is put into the extrusion device 300, the extrusion device 300 runs and is extruded through the mold 400 to produce a number of PBT wires 100. The PBT wires 100 are first conveyed by a number of feeding rollers 520 and cooled in the cooling pool 510 before being conveyed through a number of mounting rings 810.

[0088] S2. When the PBT wire 100 passes through the mounting ring 810, if the PBT wire 100 tilts to a certain angle in a certain direction, it will trigger the touch plate 822 in that direction to rotate to a certain angle according to the tilt angle of the PBT wire 100. The trigger component 840 connected to the touch plate 822 will trigger a certain number of sliders 8512 to slide according to the rotation angle of the touch plate 822, so that the current flowing through a certain number of electromagnets 852 decreases, causing a certain number of straightening wheels 832 to move towards the PBT wire 100. At the same time, the current flowing through a certain number of motors 833 increases, driving a certain number of straightening wheels 832 to rotate in the same direction as the conveying direction of the PBT wire 100 and approach the PBT wire 100 for straightening.

[0089] S3. After being straightened, several PBT wires 100 are finally conveyed to the pelletizer 700 by several feeding rollers 520. The pelletizer 700 cuts the PBT wires 100 into PBT plastic particles.

[0090] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0091] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A plastic particle production device, comprising a workbench (200), wherein an extrusion device (300), a mold (400), a cooling device (500), a shell (600) and a pelletizer (700) are sequentially arranged on the workbench (200), characterized in that: The cooling device (500) comprises a cooling pool (510) arranged on the workbench (200), and a plurality of feeding rollers (520) are arranged on the cooling pool (510); After the raw materials are extruded by the extrusion device (300) and the mold (400) to form a plurality of PBT wire materials (100), the plurality of PBT wire materials (100) are conveyed through the shell (600) to the cutting machine (700) by the plurality of feeding rollers (520); The shell (600) is provided with a plurality of automatic straightening mechanisms (800) for straightening the plurality of PBT wire materials (100), and the automatic straightening mechanism (800) comprises a plurality of detection assemblies (820) and a plurality of straightening assemblies (830) arranged circumferentially on the shell (600), the detection assembly (820) is used for detecting the inclination of the PBT wire material (100), and the straightening assembly (830) is used for straightening the PBT wire material (100).

2. The plastic particle production apparatus according to claim 1, characterized by: The automatic straightening mechanism (800) further comprises a mounting ring (810) arranged on the shell (600), and the PBT wire material (100) passes through the center of the mounting ring (810); The detection assembly (820) comprises a rotating shaft (821) rotatably arranged on the mounting ring (810), the rotating shaft (821) is provided with a touch plate (822), and the touch plate (822) is elastically connected with the mounting ring (810) through a first spring (823).

3. The plastic particle production apparatus according to claim 2, characterized by: The straightening assembly (830) comprises a sliding seat (831) slidingly arranged in the shell (600), a straightening wheel (832) is rotatably arranged on the sliding seat (831), and a motor (833) is further arranged on the sliding seat (831), and an output shaft of the motor (833) is coaxially connected with the straightening wheel (832). The automatic straightening mechanism (800) further comprises a plurality of driving assemblies (850), and the plurality of driving assemblies (850) are respectively used for driving the plurality of straightening wheels (832) to displace towards the PBT wire material (100) while rotating.

4. The plastic particle production apparatus according to claim 3, characterized by: In addition to being arranged circumferentially based on the PBT wire material (100), the plurality of straightening assemblies (830) and the plurality of driving assemblies (850) are also linearly arranged along the conveying direction of the PBT wire material (100).

5. The apparatus of claim 4, wherein: The driving assembly (850) comprises a sliding rheostat (851) and an electromagnet (852) arranged in the shell (600), the motor (833) and the electromagnet (852) are electrically connected with the sliding rheostat (851) through wires, and the sliding seat (831) is elastically connected with the shell (600) through a second spring (853).

6. The plastic particle production apparatus according to claim 5, characterized by: The sliding rheostat (851) comprises a ceramic shell (8511) arranged in the shell (600), and a sliding piece (8512) is slidingly arranged on the ceramic shell (8511); The driving assembly (850) further comprises a sliding assembly (854), the sliding assembly (854) comprises a mounting groove (8541) formed on the sliding sheet (8512), and a first trapezoidal block (8542) is slidably arranged in the mounting groove (8541); The automatic straightening mechanism (800) further comprises a plurality of trigger assemblies (840) connected with the plurality of touch plates (822) respectively, the trigger assembly (840) comprises a first rotating rod (841) rotatably arranged in the shell (600), a first gear (842) arranged on the first rotating rod (841), a first rack (843) slidably arranged in the shell (600), the first rack (843) is engaged with the first gear (842), a second trapezoidal block (844) arranged on the first rack (843), and the second trapezoidal block (844) is engaged with the inclined surface of the first trapezoidal block (8542).

7. The plastic particle production apparatus according to claim 6, characterized by: The sliding assembly (854) further comprises a third spring (8543), the first trapezoidal block (8542) is elastically connected with the inner wall of the mounting groove (8541) through the third spring (8543), a limiting rod (8544) is arranged on the first trapezoidal block (8542), and an L-shaped sliding groove (8545) is formed in the shell (600), and the limiting rod (8544) is slidably connected in the L-shaped sliding groove (8545).

8. The plastic particle production apparatus according to claim 7, characterized by: The trigger assembly (840) further comprises a transmission assembly (845) for connecting the touch plate (822) and the first rotating rod (841), the transmission assembly (845) comprises a first transmission rod (8451) arranged on the touch plate (822); A second rack (8452) is slidably arranged in the shell (600), a second transmission rod (8453) is arranged on the second rack (8452), a straight sliding groove (8454) is formed on the second transmission rod (8453), a sliding rod (8455) is arranged on the first transmission rod (8451), and the sliding rod (8455) is slidably connected in the straight sliding groove (8454).

9. The plastic particle production apparatus according to claim 8, characterized by: The transmission assembly (845) further comprises a second rotating rod (8456) rotatably arranged in the shell (600), a second gear (8457) arranged on the second rotating rod (8456), a third gear (8458) arranged on the first rotating rod (841), the second rack (8452) and the third gear (8458) are engaged with the second gear (8457), and the number of teeth of the second gear (8457) is greater than the number of teeth of the third gear (8458).

10. The production method of a plastic particle production apparatus according to claim 9, wherein The method comprises the following steps: S1, after the raw materials for preparing PBT plastic particles are put into the extrusion device (300), a plurality of PBT wire materials (100) are extruded through the operation of the extrusion device (300) and the mold (400), and the plurality of PBT wire materials (100) are first conveyed through the cooling pool (510) and then conveyed through the plurality of mounting rings (810); S2, when the PBT wire (100) passes through the installation ring (810), if the PBT wire (100) is inclined to a certain direction at a certain angle, the touch plate (822) in the direction will be touched and rotated at a certain angle according to the inclination angle of the PBT wire (100), and the trigger assembly (840) connected with the touch plate (822) will trigger a certain number of sliding sheets (8512) to slide according to the rotation angle of the touch plate (822), so that a certain number of electromagnets (852) reduce the current flowing through to make a certain number of straightening wheels (832) displace to the PBT wire (100), and a certain number of motors (833) increase the current flowing through to drive a certain number of straightening wheels (832) to rotate in the direction consistent with the conveying direction of the PBT wire (100) to approach the PBT wire (100) for straightening; S3, after the PBT wires (100) are straightened, they are finally conveyed to the pelletizer (700) by the feeding rollers (520), and the pelletizer (700) cuts the PBT wires (100) into PBT plastic particles.

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