A melt dispersion apparatus for polyether ether ketone resin

Abstract

This invention belongs to the technical field of melt dispersion equipment and discloses a melt dispersion device for polyether ether ketone (PEEK) resin. The device includes a shearing container with a discharge pipe connected to its bottom; a bidirectional vortex melting chamber installed at the top of the shearing container and connected thereto, containing upper and lower spiral guide vanes; and a stepped shearing mechanism including a drive rod vertically and rotatably mounted within the shearing container, on which a stepped helical tooth shearing disc is mounted. One end of the drive rod extending out of the shearing container is driven by a gear drive. This invention generates a complex three-dimensional strong shear flow field through the bidirectional vortex melting chamber, combined with the segmented and differentiated high-intensity shearing action of the stepped helical tooth shearing disc, significantly improving the melting efficiency and dispersion uniformity of high-viscosity PEEK melt and effectively breaking up agglomerated particles in the melt.

Description

Technical Field

[0001] This utility model relates to the field of melt dispersion equipment technology, and in particular to a melt dispersion equipment for polyether ether ketone resin. Background Technology

[0002] Melt dispersion equipment for polyether ether ketone (PEEK) resin is an industrial device specifically designed for processing high-performance thermoplastic material PEEK. Its main function is to heat solid PEEK resin to a molten state and then uniformly mix and disperse it with other additives, fillers, or reinforcing materials (such as carbon fiber, glass fiber, etc.) to meet specific application requirements.

[0003] Polyetheretherketone (PEEK) resin, as a high-performance specialty engineering plastic, suffers from high melt viscosity and poor dispersion uniformity during melt processing. Current technologies often employ screw extruders combined with static mixers to achieve melt dispersion, but these methods have the following drawbacks:

[0004] 1) Insufficient adaptability to high viscosity: Traditional screws are prone to axial movement under high temperature and high pressure, resulting in fluctuations in melt pressure;

[0005] 2) Low dispersion efficiency: The shear force distribution of PEEK melt by the static mixer is uneven, making it difficult to break up the agglomerated particles in the melt. Therefore, we propose a melt dispersion device for polyether ether ketone resin. Utility Model Content

[0006] In view of the problems of insufficient adaptability to high viscosity and low dispersion efficiency of the existing melt dispersion equipment, this utility model is proposed.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A melt dispersion device for polyetheretherketone resin includes a shearing container, wherein a discharge pipe is installed at the bottom of the shearing container and the discharge pipe is connected to the shearing container;

[0009] A bidirectional vortex melting chamber is installed on the top of the shearing container and is connected to the shearing container. An upper spiral guide vane and a lower spiral guide vane are installed in the bidirectional vortex melting chamber from top to bottom.

[0010] A stepped shearing mechanism includes a drive rod that is vertically and rotatably mounted inside the shearing container. A stepped helical tooth shearing disc is mounted on the drive rod, and one end of the drive rod extending out of the shearing container is driven by a gear drive.

[0011] As a technical solution for the melting and dispersing device of polyether ether ketone resin according to the present invention, the upper spiral guide plate and the lower spiral guide plate have opposite spiral directions, and the spiral angles of the upper spiral guide plate and the lower spiral guide plate are gradually reduced along the material flow direction.

[0012] As a technical solution for the melt dispersion device of polyether ether ketone resin according to the present invention, the stepped oblique tooth shearing disk includes a lower oblique tooth shearing disk, a middle oblique tooth shearing disk and an upper oblique tooth shearing disk, and the lower oblique tooth shearing disk, the middle oblique tooth shearing disk and the upper oblique tooth shearing disk are installed sequentially from bottom to top along the axial direction of the drive rod.

[0013] As a technical solution for the melt dispersion device of polyetheretherketone resin according to the present invention, wherein the tooth inclination angles of the lower oblique tooth shearing disk, the middle oblique tooth shearing disk and the upper oblique tooth shearing disk are 15°, 30° and 45° respectively.

[0014] As a technical solution of the polyether ether ketone resin melt dispersion device of the present invention, wherein: the gear drive component includes a servo motor, a fixed frame is installed on the top of the shear container, the servo motor is installed on the fixed frame, a drive gear is installed on the output shaft of the servo motor, a driven gear is installed on the end of the drive rod extending out of the shear container, and the driven gear is meshed with the drive gear.

[0015] As a technical solution for the melt dispersion device of polyetheretherketone resin according to the present invention, the driving gear is smaller than the driven gear, and the gear module of the driving gear and the driven gear is ≥10mm.

[0016] As a technical solution for the melting and dispersing device of polyether ether ketone resin according to the present invention, the fixing frame is an inverted U-shaped structure integrally formed and having a horizontal part and a vertical part, the servo motor is installed on the horizontal part, and the vertical part is installed on the top of the shearing container.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. This utility model generates a complex three-dimensional strong shear flow field through a bidirectional vortex melting cavity. Combined with the segmented and differentiated high-intensity shearing action of the stepped oblique tooth shear disk, it significantly improves the melting efficiency and dispersion uniformity of PEEK high-viscosity melt, effectively breaks up agglomerated particles in the melt, and solves the problems of uneven shear force distribution and low dispersion efficiency in traditional static mixers.

[0019] 2. This utility model provides high torque output by using a large-module gear reduction and torque amplification transmission, and is combined with a high-rigidity inverted U-shaped fixing frame to stably support the servo motor. This effectively suppresses the vibration of the drive system and the axial movement of the drive rod, thereby stabilizing the melt pressure and significantly improving the operational stability and mechanical reliability of the equipment under high viscosity, high temperature and high pressure PEEK melting and dispersion conditions. At the same time, it solves the problem of axial movement and pressure fluctuation that traditional screw extruders are prone to under high viscosity conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the stepped shearing mechanism of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] In the diagram: 1. Shearing container; 101. Discharge pipe; 2. Two-way vortex melting chamber; 201. Upper spiral guide vane; 202. Lower spiral guide vane; 3. Drive rod; 401. Lower helical tooth shearing disc; 402. Middle helical tooth shearing disc; 403. Upper helical tooth shearing disc; 5. Servo motor; 6. Fixing frame; 7. Drive gear; 8. Driven gear. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Reference Figures 1-3 A melt dispersion device for polyether ether ketone resin is provided. The melt dispersion device for polyether ether ketone resin includes a shear container 1. The shear container 1 is a cylindrical cavity supported by high temperature resistant alloy steel. A discharge pipe 101 is installed at the bottom of the shear container 1 and is connected to the shear container 1.

[0028] The bidirectional vortex melting chamber 2 is installed on top of the shear container 1 and is connected to the shear container 1. The bidirectional vortex melting chamber 2 is equipped with an upper spiral guide vane 201 and a lower spiral guide vane 202 installed from top to bottom inside the bidirectional vortex melting chamber 2. In application, the combination of the upper spiral guide vane 201 and the lower spiral guide vane 202 can guide the melt to form complex three-dimensional flow (such as vertical convection and vortex) in the chamber, which can significantly increase the shear rate and mixing degree inside the melt. It can more effectively promote the melting and initial dispersion of PEEK resin than the traditional static mixer, so as to solve the problem of low dispersion efficiency.

[0029] The stepped shearing mechanism includes a drive rod 3 vertically and rotatably mounted inside the shearing container 1. A stepped helical tooth shearing disc is mounted on the drive rod 3. The end of the drive rod 3 extending out of the shearing container 1 is driven by a gear drive. In application, the drive rod 3 drives the stepped helical tooth shearing disc to rotate, applying a high-intensity shearing force to the melt. Shearing discs with different structures are set at different height positions in the shearing container 1, so that more targeted shearing action can be applied according to the viscosity or dispersion state of the melt in different areas of the shearing container 1 (e.g., the viscosity at the bottom may be higher, and there may be more agglomerates), thereby improving the overall dispersion efficiency and helping to stabilize the melt flow.

[0030] Reference Figure 2 The upper spiral guide vane 201 and the lower spiral guide vane 202 have opposite spiral directions, and their spiral angles gradually decrease along the material flow direction, decreasing from 60° to 30° from the inlet to the outlet. In application, the reverse arrangement of the upper spiral guide vane 201 and the lower spiral guide vane 202 can generate strong convection and turbulence effects, greatly enhancing the mixing intensity of the melt in the cavity, effectively breaking up agglomerated particles in the melt, and significantly improving the dispersion uniformity. At the same time, the gradually decreasing spiral angle along the material flow direction (usually from top to bottom) makes the guiding effect of the guide vane on the material gradually stronger (or the flow channel cross-sectional area changes), which helps to provide a larger flow space in the early stage of melting (at the inlet) to accommodate materials that may not be completely melted, while in the later stage of melting (at the outlet), it can apply stronger shear and compression effects, promote further homogenization and degassing of the melt, and optimize the melting and dispersion process.

[0031] Reference Figure 2 and Figure 3The stepped oblique tooth shearing disc includes a lower oblique tooth shearing disc 401, a middle oblique tooth shearing disc 402, and an upper oblique tooth shearing disc 403. The lower oblique tooth shearing disc 401, the middle oblique tooth shearing disc 402, and the upper oblique tooth shearing disc 403 are installed sequentially from bottom to top along the axial direction of the drive rod 3. In application, the lower oblique tooth shearing disc 401, the middle oblique tooth shearing disc 402, and the upper oblique tooth shearing disc 403 can achieve segmented and differentiated shearing. The lower oblique tooth shearing disc 401, the middle oblique tooth shearing disc 402, and the upper oblique tooth shearing disc 403 are located at different heights in the melt flow channel to correspond to different melting states and viscosity regions.

[0032] Reference Figure 2 and Figure 3 The tooth inclination angles of the lower oblique tooth shear disc 401, the middle oblique tooth shear disc 402, and the upper oblique tooth shear disc 403 are 15°, 30°, and 45°, respectively. In application, the lower oblique tooth shear disc 401 provides a stronger combination of axial conveying force and radial shearing force, making it more suitable for crushing and conveying high-viscosity melts. The middle oblique tooth shear disc 402 balances radial shearing and axial conveying, making it suitable for dispersing and mixing medium-viscosity melts. The upper oblique tooth shear disc 403 provides a stronger axial conveying force (pumping action) and relatively weaker radial shearing, focusing more on the homogenization and conveying of melts and avoiding unnecessary shear heat in the low-viscosity region. At the same time, the inclination angle gradient design makes the functional positioning of each level of shear disc clearer, maximizing its efficiency in different melting and dispersion stages.

[0033] Reference Figure 2 and Figure 3 The gear drive includes a servo motor 5, a fixed frame 6 is mounted on the top of the shearing container 1, the servo motor 5 is mounted on the fixed frame 6, a drive gear 7 is mounted on the output shaft of the servo motor 5, and a driven gear 8 is mounted on the end of the drive rod 3 that extends out of the shearing container 1. The driven gear 8 meshes with the drive gear 7. In application, the gear drive provides a high-torque, stable and reliable power transmission method, while the servo motor 5 provides precise speed control capability. The gear transmission can withstand the high shear force (corresponding to high torque) required for PEEK melting and dispersion, and is more stable than belt drives, which helps to reduce the axial movement of the drive rod 3, thereby stabilizing the melt pressure and solving the problem of melt pressure fluctuation caused by axial movement.

[0034] Reference Figure 2 and Figure 3The driving gear 7 is smaller than the driven gear 8, and the gear module of both the driving gear 7 and the driven gear 8 is ≥10mm. In application, the design of the driving gear 7 being smaller and the driven gear 8 being larger constitutes a speed reduction and torque amplification transmission, which can amplify the torque output of the servo motor 5, enabling it to drive the stepped shearing mechanism to overcome the huge resistance generated by the high viscosity PEEK melt and provide sufficient shearing force. At the same time, the gear module ≥10mm can significantly improve the load-bearing capacity and bending strength of the gears, ensuring that the gear transmission system can work stably under high torque conditions that may be accompanied by impact loads, avoiding damage and ensuring the long-term reliability of the equipment.

[0035] Reference Figures 1-3 The fixed frame 6 is an inverted U-shaped structure with a horizontal and a vertical part. The servo motor 5 is mounted on the horizontal part and the vertical part is mounted on the top of the shearing container 1. In application, the one-piece design has the advantages of good rigidity and high stability. It can stably support the servo motor 5, effectively absorb the vibration of the motor during operation, and minimize the path of vibration to the shearing container 1. This helps to maintain the stability of the entire drive system and shearing mechanism, further reduce the adverse effects of vibration on melt flow and pressure stability, and improve the smoothness of equipment operation.

[0036] The working principle of this utility model is as follows: PEEK resin preheated to 360-400℃ is fed into the top feed port of the bidirectional vortex melting chamber 2. At this time, the upper spiral guide vane 201 guides the material to form a clockwise rotating downward flow, generating centrifugal force to initially disperse the particles. The lower spiral guide vane 202 forces the melt to flow upward in a reverse spiral, colliding with the falling material to form turbulence, and initially breaking up the agglomerates of PEEK resin particles. Then, the servo motor 5 fixed on the fixed frame 6 is started. At this time, the output shaft of the servo motor 5 drives the drive gear 7. The drive gear 7 rotates, driving the driven gear 8 to rotate, which in turn drives the drive rod 3 to rotate. The drive rod 3 then drives the stepped helical tooth shearing disc to rotate. The lower helical tooth shearing disc 401 applies a 15° angle of shearing to the high-viscosity melt (bottom area) to break up unmelted particles. The middle helical tooth shearing disc 402 uses a 30° angle of shearing and conveying to refine and disperse the melt. The upper helical tooth shearing disc 403 uses a large 45° angle of inclination to accelerate the melt towards the discharge port for final homogenization. Finally, the homogenized melt is discharged to the molding section through the discharge pipe 101.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A melt dispersion device for polyetheretherketone resin, characterized in that: include: A shearing container (1) is provided with a discharge pipe (101) installed at the bottom of the shearing container (1), and the discharge pipe (101) is connected to the shearing container (1); A bidirectional vortex melting chamber (2) is installed on the top of the shear container (1) and is connected to the shear container (1). An upper spiral guide vane (201) and a lower spiral guide vane (202) are installed in the bidirectional vortex melting chamber (2) from top to bottom. A stepped shearing mechanism includes a drive rod (3) that is vertically and rotatably installed inside the shearing container (1). A stepped helical tooth shearing disc is installed on the drive rod (3). One end of the drive rod (3) that extends out of the shearing container (1) is driven by a gear drive.

2. The melt dispersion equipment for polyetheretherketone resin according to claim 1, characterized in that: The upper spiral guide vane (201) and the lower spiral guide vane (202) have opposite spiral directions, and the spiral angles of the upper spiral guide vane (201) and the lower spiral guide vane (202) are gradually reduced along the material flow direction.

3. The melt dispersion equipment for polyetheretherketone resin according to claim 1, characterized in that: The stepped oblique tooth shearing disc includes a lower oblique tooth shearing disc (401), a middle oblique tooth shearing disc (402), and an upper oblique tooth shearing disc (403). The lower oblique tooth shearing disc (401), the middle oblique tooth shearing disc (402), and the upper oblique tooth shearing disc (403) are installed sequentially from bottom to top along the axial direction of the drive rod (3).

4. The melt dispersion equipment for polyetheretherketone resin according to claim 3, characterized in that: The tooth inclination angles of the lower oblique tooth shearing disk (401), the middle oblique tooth shearing disk (402), and the upper oblique tooth shearing disk (403) are 15°, 30°, and 45°, respectively.

5. The melt dispersion equipment for polyetheretherketone resin according to claim 1, characterized in that: The gear drive includes a servo motor (5), a fixed frame (6) is installed on the top of the shearing container (1), the servo motor (5) is installed on the fixed frame (6), a drive gear (7) is installed on the output shaft of the servo motor (5), and a driven gear (8) is installed on one end of the drive rod (3) that extends out of the shearing container (1), and the driven gear (8) meshes with the drive gear (7).

6. The melt dispersion equipment for polyetheretherketone resin according to claim 5, characterized in that: The driving gear (7) is smaller than the driven gear (8), and the gear module of the driving gear (7) and the driven gear (8) is ≥10mm.

7. The melt dispersion equipment for polyetheretherketone resin according to claim 5, characterized in that: The fixing frame (6) is an inverted U-shaped structure integrally formed and has a horizontal part and a vertical part. The servo motor (5) is installed on the horizontal part and the vertical part is installed on the top of the shearing container (1).

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