Dynamic mixer for high-speed spinning of polyester black yarn

Abstract

The application discloses a dynamic mixer for high-speed spinning of polyester black yarn, which comprises a rack, a mixer shell, a driving shaft, a passive shaft, a flow guide disc, stirring blades, a nest and a PET melt feeding pipe joint. The mixer shell is provided with a through hole extending to a tail end in a concentric manner. The front end of the mixer shell is provided with an embedded hole connected with the through hole in a concentric manner. The nest is arranged in the embedded hole. The passive shaft is arranged in a second bearing seat and is connected with the driving shaft at the tail end. The first flow distribution plug is provided with a first flow hole parallel to the axial direction of the PET melt feeding pipe joint. The flow guide disc is arranged on the passive shaft in a concentric and spaced manner. The inner wall of the nest is provided with a ring groove corresponding to the edge of the flow guide disc in a one-to-one manner. The edge of the flow guide disc extends into the corresponding ring groove. The stirring blades are arranged on the outer side of the passive shaft along the axial direction of the passive shaft. The multiple dynamic mixing ensures the uniformity of mixing, and the structure is simple and convenient to maintain.

Description

Technical Field

[0001] This invention relates to the field of polyester spinning technology, and in particular to a dynamic mixer for high-speed spinning of polyester black yarn. Background Technology

[0002] During the high-speed spinning of polyester black yarn, the spinning speed is relatively high, which can be set to 4200m / min. The amount of black masterbatch added is precisely controlled at 4.0%. Due to the high spinning speed, in order to improve the color uniformity of polyester black yarn, higher requirements are put forward for the mixing uniformity of masterbatch melt and PET melt.

[0003] In the prior art, the invention patent with application number 2020800258233 discloses a dynamic mixer, a dispensing component, and a method for dispensing multi-component materials from a cylinder. The dynamic mixer is used to dynamically mix multi-component materials, but the structure is complex, the cost is high, and it is not conducive to disassembly and maintenance. It is difficult to apply to the dynamic mixing of black masterbatch melt and PET melt, and improvement is needed. Summary of the Invention

[0004] The main technical problem solved by this invention is to provide a dynamic mixer for high-speed spinning of polyester black yarn, which realizes dynamic mixing of black masterbatch melt and PET melt, simplifies the structure and improves maintenance convenience.

[0005] To solve the above-mentioned technical problems, the present invention provides a dynamic mixer for high-speed spinning of polyester black yarn, comprising: a frame, a mixer housing, a drive shaft, a driven shaft, a guide plate, stirring blades, a nest, and a PET melt feed pipe connector. The mixer housing is horizontally mounted on the frame. A through hole extending to the tail end is concentrically arranged in the mixer housing. A first bearing seat is provided at the tail end of the mixer housing to block the through hole. An embedded hole concentrically connected to the through hole is recessed at the front end of the mixer housing. The nest is disposed in the embedded hole. A second bearing seat is provided at the front end of the mixer housing to block the embedded hole. The drive shaft is disposed in the first bearing seat, with its front end extending into the through hole. The driven shaft is disposed in the second bearing seat, with its tail end inserted into the drive shaft. A feed inlet pointing towards the tail end of the driven shaft is provided on the mixer housing. The PET melt feed pipe connector is disposed on the mixer housing and connected to the feed inlet. The feed inlets are connected. A masterbatch melt feed pipe connector is vertically arranged on one side of the PET melt feed pipe connector. A first stepped groove is recessed at the outer end of the PET melt feed pipe connector. A first flow distribution block is arranged in the first stepped groove. A first flow distribution hole is arranged in an array on the first flow distribution block, which is parallel to the axial direction of the PET melt feed pipe connector. A second stepped groove is recessed at the outer end of the masterbatch melt feed pipe connector. A second flow distribution block is arranged in the second stepped groove. A second flow distribution hole is arranged in an array on the second flow distribution block, which is perpendicular to the axial direction of the first flow distribution hole. The guide plates are concentrically and spaced on the passive shaft. The inner wall of the nest is recessed and has annular grooves that correspond one-to-one with the edge of the guide plate. The edge of the guide plate extends into the corresponding annular groove and leaves a gap. The stirring blades are arranged on the outside of the passive shaft along the axial direction of the passive shaft and penetrate the guide plate. A discharge pipe connector is arranged at the bottom front end of the mixer shell.

[0006] In a preferred embodiment of the present invention, the tail end of the passive shaft is provided with a socket corresponding to the front end of the drive shaft.

[0007] In a preferred embodiment of the present invention, a keyway is provided on the drive shaft, and a positioning key extending into the driven shaft is provided in the keyway.

[0008] In a preferred embodiment of the present invention, a reduction gearbox connected to a drive shaft is provided on the frame, and a motor is provided at the input end of the reduction gearbox.

[0009] In a preferred embodiment of the present invention, the first bearing seat is provided with a first screw that connects to the mixer housing, and the second bearing seat is provided with a second screw that connects to the mixer housing.

[0010] In a preferred embodiment of the present invention, the second bearing housing is provided with a third screw that is connected to the nest.

[0011] In a preferred embodiment of the present invention, a fourth screw is provided on the PET melt feed pipe connector to connect with the mixer housing.

[0012] In a preferred embodiment of the present invention, the guide plate is provided with an outer conical surface on both sides, and the annular groove is provided with an inner conical surface corresponding to the outer conical surface on both sides.

[0013] In a preferred embodiment of the present invention, the nesting includes two symmetrical semi-circular curved plates, which embrace each other to form a circular nesting structure.

[0014] In a preferred embodiment of the present invention, the outer ends of the first flow distribution hole and the second flow distribution hole are respectively provided with tapered holes.

[0015] The beneficial effects of this invention are as follows: The dynamic mixer for high-speed spinning of polyester black yarn disclosed in this invention can spray multiple fine streams of PET melt through a first flow plug and multiple fine streams of black masterbatch melt through a second flow plug. Preliminary dynamic mixing can be achieved before entering the mixer shell to form a mixed melt. After the mixed melt enters the mixer shell, it is stirred by stirring blades to improve the mixing uniformity. It is also divided by a guide plate to form segmented multiple stirring of the mixed melt. When the mixed melt passes through the gap formed by the edge of the guide plate and the annular groove, it is subjected to multiple compression and shearing to ensure the mixing uniformity. Moreover, the nesting can be disassembled and separated, the structure is simple, and the maintenance convenience is improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of a preferred embodiment of the dynamic mixer for high-speed spinning of polyester black yarn according to the present invention; Figure 2 yes Figure 1 Exploded view; Figure 3 yes Figure 1 A magnified view of part A in the middle. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0018] Please see Figures 1-3 The embodiments of the present invention include: like Figure 1 The illustrated dynamic mixer for high-speed spinning of polyester black yarn includes: a frame 2, a mixer housing 1, a drive shaft 7, a driven shaft 6, a guide plate 18, stirring blades 25, a nesting structure 3, and a PET melt feed pipe connector 8. The mixer housing 1 is horizontally mounted on the frame 2 and can be fixed with bolts. In this embodiment, the mixer housing 1 has a rectangular parallelepiped structure, which is relatively regular and facilitates the installation of heat transfer oil holes. Heat transfer oil is introduced to maintain the high temperature of the mixer housing 1 and improve the fluidity of the melt.

[0019] like Figure 2 As shown, a through hole 30 extending to the tail end is concentrically arranged in the mixer housing 1, and a first bearing seat 4 is provided at the tail end of the mixer housing 1 to block the through hole 30. In this embodiment, a first screw 21 connected to the mixer housing 1 is provided on the first bearing seat 4, which has a stable structure and is convenient to disassemble and assemble.

[0020] An embedding hole 31, concentrically connected to the through hole 30, is provided in the front end recess of the mixer housing 1. The nest 3 is disposed in the embedding hole 31. In this embodiment, the nest 3 includes two symmetrical semi-circular curved plates 32. The two semi-circular curved plates 32 hug each other to form a circular nest structure, which is convenient to assemble and disassemble and facilitates cleaning of residual melt after disassembly.

[0021] A second bearing seat 5 is provided at the front end of the mixer housing 1 to block the embedded hole 31. In this embodiment, the second bearing seat 5 is provided with a second screw 22 that connects to the mixer housing 1, resulting in a robust structure. In addition, the second bearing seat 5 is provided with a third screw 23 that connects to the nest 3, preventing the nest 3 from twisting and ensuring high stability.

[0022] The drive shaft 7 is disposed in the first bearing housing 4, and its front end extends into the through hole 30. The first bearing housing 4 is equipped with a bearing to provide rolling support for the drive shaft 7, and a mechanical seal or other sealing element is used to provide rotational sealing for the drive shaft 7 to prevent leakage of the molten material.

[0023] The passive shaft 6 is disposed in the second bearing housing 5, and its tail end is inserted into the drive shaft 7. In this embodiment, the tail end of the passive shaft 6 is provided with a corresponding insertion hole to the front end of the drive shaft 7 to ensure quick insertion. The drive shaft 7 is provided with a keyway 28, and a positioning key 29 extending into the passive shaft 6 is provided in the keyway 28 to ensure the rotational synchronization of the passive shaft 6 and the drive shaft 7.

[0024] like Figure 1 As shown, in this embodiment, a reduction gearbox 10 connected to the drive shaft 7 is mounted on the frame 2. The drive shaft 7 can be quickly connected to the output end of the reduction gearbox 10 via a coupling. A motor 16 is mounted on the input end of the reduction gearbox 10 to achieve rotary drive. The motor 16 can be speed controlled by a corresponding controller, providing flexible control.

[0025] The mixer housing 1 is provided with a feed inlet 17 pointing to the tail end of the passive shaft 6. The PET melt feed pipe connector 8 is provided on the mixer housing 1 and connected to the feed inlet 17. In this embodiment, the PET melt feed pipe connector 8 is provided with a fourth screw 24 for connection to the mixer housing 1, which facilitates disassembly and assembly and ensures a robust structure. A masterbatch melt feed pipe connector 9 is vertically arranged on one side of the PET melt feed pipe connector 8. The PET melt feed pipe connector 8 and the masterbatch melt feed pipe connector 9 can adopt a T-shaped integrated structure. The PET melt feed pipe connector 8 is connected to an external PET melt metering pump through a pipeline to feed PET melt into the PET melt feed pipe connector 8. The masterbatch melt feed pipe connector 9 is connected to an external black masterbatch melt metering pump through a pipeline to feed black masterbatch melt into the masterbatch melt feed pipe connector 9.

[0026] like Figure 2 As shown, the outer end of the PET melt feed pipe connector 8 is recessed with a first stepped groove 26. A first flow distribution block 11 is provided in the first stepped groove 26. The first flow distribution block 11 is arranged with an array of first flow distribution holes 13 parallel to the axial direction of the PET melt feed pipe connector 8. Multiple fine streams of PET melt are ejected through the first flow distribution holes 13.

[0027] A second stepped groove 27 is recessed at the outer end of the masterbatch melt feed pipe joint 9. A second flow plug 12 is provided in the second stepped groove 27 for precise positioning. In this embodiment, the second flow plug 12 is provided with an array of second flow holes 14 that are perpendicular to the axis of the first feed hole 13. Multiple thin streams of black masterbatch melt are sprayed out by the second flow holes 14, so that the PET melt and the black masterbatch melt can achieve preliminary dynamic mixing before entering the through hole 30, forming a more uniform mixed melt.

[0028] like Figure 1As shown, the outer ends of the first flow hole 13 and the second flow hole 14 are respectively provided with conical holes 15. The conical holes 15 facilitate the entry of the corresponding melt into the first flow hole 13 or the second flow hole 14, and accelerate the flow to eject columnar melt streams.

[0029] The guide disks 18 are concentrically and spaced apart on the passive shaft 6, and the guide disks 18 are welded and fixed to the passive shaft 6 to achieve synchronous rotation. Figure 3 As shown, annular grooves 20 corresponding to the edges of the guide plate 18 are recessed in the inner wall of the nest 3. The edges of the guide plate 18 extend into the corresponding annular grooves 20 and leave gaps. When the mixed melt passes through the gaps, it achieves multiple extrusions and shearings, ensuring the uniformity of mixing.

[0030] In this embodiment, the guide plate 18 is provided with outer conical surfaces 34 on both sides, and the annular groove 20 is provided with inner conical surfaces 33 corresponding to the outer conical surfaces 34 on both sides, to guide the mixed melt, so that the mixed melt turns in the gap and the path is generally C-shaped contact, which increases the extrusion and shearing effect and further improves the uniformity of the mixing of PET melt and black masterbatch melt.

[0031] The stirring blades 25 are arranged along the axial direction of the passive shaft 6 on the outside of the passive shaft 6 and penetrate through the guide plate 18, as shown. Figure 1 As shown, 4 to 8 stirring blades 25 are arranged in a ring array on the outer circumference of the passive shaft 6 and are welded and fixed for synchronous rotation. This allows the molten mixture to be stirred by the stirring blades 25 after entering the mixer housing 1, improving the uniformity of the mixture. In addition, the stirring process is divided by the guide plate 18, forming segmented multiple stirring of the molten mixture. Combined with the intermittent extrusion and shearing, a mixing process of multiple stirring, extrusion and shearing is formed to ensure the uniformity of the mixing of PET melt and black masterbatch melt.

[0032] A discharge pipe connector 19 is provided at the bottom front end of the mixer housing 1. The uniformly mixed melt is discharged through the discharge pipe connector 1 and then supplied to the subsequent spinneret assembly, where it is extruded at high speed as polyester black yarn and then air-cooled and cured. Figure 2 As shown, after spinning is completed, the first flow plug 11, the second flow plug 12, the passive shaft 6 and the nest 3 are removed to clean the residual melt. The maintenance operation is simple and reduces the working time.

[0033] In summary, the present invention discloses a dynamic mixer for high-speed spinning of polyester black yarn, which can dynamically mix PET melt and black masterbatch melt, ensuring the uniformity of the mixed melt, with a simple structure and convenient maintenance.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A dynamic mixer for high-speed spinning of polyester black yarn, characterized in that, include: The mixer comprises a frame, a mixer housing, a drive shaft, a driven shaft, a guide plate, stirring blades, a nest, and a PET melt feed pipe connector. The mixer housing is horizontally mounted on the frame. A through-hole extending to the tail end is concentrically arranged within the mixer housing. A first bearing seat sealing the through-hole is located at the tail end of the mixer housing. An embedded hole concentrically connected to the through-hole is recessed at the front end of the mixer housing. The nest is disposed within the embedded hole. A second bearing seat sealing the embedded hole is located at the front end of the mixer housing. The drive shaft is disposed within the first bearing seat, with its front end extending into the through-hole. The driven shaft is disposed within the second bearing seat, with its tail end inserted into the drive shaft. A feed inlet pointing towards the tail end of the driven shaft is provided on the mixer housing. The PET melt feed pipe connector is disposed on the mixer housing and connected to the feed inlet. A vertically arranged... The device includes a masterbatch melt feed pipe connector. The outer end of the masterbatch melt feed pipe connector has a recessed first stepped groove. A first flow distribution block is located in the first stepped groove. The first flow distribution block has an array of first flow distribution holes parallel to the axial direction of the masterbatch melt feed pipe connector. The outer end of the masterbatch melt feed pipe connector also has a recessed second stepped groove. The second stepped groove has a second flow distribution block. The second flow distribution block has an array of second flow distribution holes perpendicular to the axial direction of the first flow distribution holes. A guide plate is concentrically and spaced along the passive shaft. The inner wall of the nest has recessed annular grooves corresponding to the edges of the guide plates. The edges of the guide plates extend into the corresponding annular grooves, leaving gaps. A stirring blade is located along the axial direction of the passive shaft on the outside of the passive shaft and penetrates the guide plate. A discharge pipe connector is located at the bottom front end of the mixer housing.

2. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The passive shaft has a corresponding insertion hole at its tail end, which corresponds to the front end of the drive shaft.

3. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 2, characterized in that, The drive shaft is provided with a keyway, and a positioning key extending into the driven shaft is provided in the keyway.

4. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The frame is equipped with a reduction gearbox connected to the drive shaft, and the input end of the reduction gearbox is equipped with a motor.

5. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The first bearing housing is provided with a first screw that connects to the mixer housing, and the second bearing housing is provided with a second screw that connects to the mixer housing.

6. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The second bearing housing is provided with a third screw that connects to the nested structure.

7. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The PET melt feed pipe joint is equipped with a fourth screw that connects to the mixer housing.

8. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The guide plate has an outer conical surface on each side, and the annular groove has an inner conical surface on each side corresponding to the outer conical surface.

9. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The nesting includes two symmetrical semi-circular curved plates, which embrace each other to form a circular nesting structure.

10. The dynamic mixer for high-speed spinning of polyester black yarn according to claim 1, characterized in that, The outer ends of the first and second flow distribution holes are respectively provided with tapered holes.

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