Foaming extruder with high mixing efficiency

Abstract

The utility model relates to the technical field of plastic processing equipment, in particular to a foaming extruder with high mixing efficiency, which comprises a machine table, an extruder body, a mixing barrel, a rotating device, a mixing device and an auxiliary mixing device, the extruder body is mounted on the top wall of the machine table, a discharge pipe is mounted at the top end of the extruder body, and the rotating device is mounted on the discharge pipe. A valve is installed on the outer wall of the discharging pipe, the mixing barrel is rotatably installed at the top end of the discharging pipe, the rotating device is installed on the outer wall of the mixing barrel, the mixing device is installed in the mixing barrel, and efficient mixing of materials can be achieved through cooperative work of the rotating device, the mixing device and the auxiliary mixing device; the problem of non-uniform mixing in a traditional method is solved, the quality of a final product can be remarkably improved through more uniform material mixing, the rejection rate is reduced, and therefore the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing equipment technology, specifically to a foaming extruder with high mixing efficiency. Background Technology

[0002] As is well known, in the plastics processing industry, foaming extruders are key equipment for producing foamed plastic products. Traditional foaming extruders have some shortcomings in the material mixing and foaming processes, which directly affect the quality of the final product and production efficiency. Specifically, traditional equipment faces the following main problems.

[0003] Traditional foaming extruders typically rely on a single mechanical stirring method to achieve initial mixing of materials. However, this method often fails to ensure sufficient dispersion and uniform mixing of material components, especially when processing raw materials with different physical properties (such as polymer matrix and foaming agent). This can easily lead to imbalances in the proportion of material components in local areas, thereby affecting the quality of the finished product. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a foaming extruder with high mixing efficiency.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a foaming extruder with high mixing efficiency, comprising a machine base, an extruder body, a mixing cylinder, a rotating device, a mixing device, and an auxiliary mixing device. The extruder body is mounted on the top wall of the machine base. A discharge pipe is mounted on the top of the extruder body. A valve is mounted on the outer wall of the discharge pipe. The mixing cylinder is rotatably mounted on the top of the discharge pipe. The rotating device is mounted on the outer wall of the mixing cylinder. The mixing device is installed inside the mixing cylinder. A feed pipe is mounted on the top wall of the mixing cylinder. A sealing cap is threaded onto the top wall of the feed pipe. The auxiliary mixing device is mounted on the rear end of the top wall of the mixing cylinder.

[0008] Furthermore, the present invention is improved in that the mixing device includes a mixing shaft, a mixing tube and a driving device, the mixing shaft is rotatably installed inside the mixing cylinder, multiple sets of the mixing tubes are installed in a ring on the outer wall of the mixing shaft, and the driving device is installed at the top end of the mixing shaft.

[0009] Furthermore, the present invention is improved in that the driving device includes a driven bevel gear, a driving bevel gear and a mixing motor. The driven bevel gear is sleeved through the top of the mixing shaft and passes through the top wall of the mixing cylinder. The mixing motor is installed at one end of the top wall of the mixing cylinder. The driving bevel gear is installed at the output end of the mixing motor. The driving bevel gear and the driven bevel gear are meshed and connected.

[0010] Furthermore, the present invention is improved in that the rotating device includes a gear ring, a pinion and a rotating motor. The gear ring is sleeved on the outer wall of the mixing cylinder, the rotating motor is installed on the top wall of the extruder body, and the pinion is installed on the top output end of the rotating motor. The pinion and the gear ring are meshed and connected.

[0011] Furthermore, the present invention is improved in that a scraper is installed at the end of each mixing pipe away from the mixing shaft, and the scraper is adapted to the inner side wall of the mixing cylinder.

[0012] Furthermore, the present invention is improved in that the auxiliary mixing device includes a blower, a transmission pipe, a bearing, an air outlet, and micro-through holes. The blower is installed at the rear end of the top wall of the mixing cylinder, and the transmission pipe is installed at the air outlet end of the blower. The end of the transmission pipe is connected to the top end of the mixing shaft through the bearing. Multiple sets of air outlets penetrating the transmission pipe are installed on the outer wall of the mixing pipe, and multiple sets of micro-through holes are formed in a ring shape on the top wall of the mixing cylinder.

[0013] Furthermore, an improvement of this utility model is that all of the mixing pipes are designed to be inclined.

[0014] Furthermore, an improvement of this utility model is that the valve is a solenoid valve.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a foaming extruder with high mixing efficiency, which has the following beneficial effects:

[0017] This high-efficiency foaming extruder, through its mixing device, features multiple sets of mixing tubes on the mixing shaft that rotate with the shaft. This not only disperses and mixes materials but also improves mixing efficiency and uniformity by increasing friction and shear force between materials. The dynamic mixing action generated by the inclined mixing tubes rotating with the mixing shaft effectively breaks up material agglomeration, allowing materials of different components to be dispersed more evenly, greatly improving the mixing effect. The drive device, consisting of a driven bevel gear, a driving bevel gear, and a mixing motor, effectively converts and transmits the rotational power of the mixing motor to the mixing shaft, achieving high-efficiency power transmission and ensuring the stability and reliability of the mixing process.

[0018] This high-efficiency foaming extruder, through its rotating device, particularly the overall rotation of the mixing cylinder, effectively breaks up material agglomeration during the mixing process, ensuring that various components are more evenly dispersed. The overall rotation of the mixing cylinder, combined with the rotation of the internal mixing shaft and its mixing tubes, allows the material to be subjected to shearing and stirring in multiple dimensions. This multi-directional stirring greatly improves the mixing efficiency and uniformity of the material, contributing to the production of higher-quality and more stable foamed plastic products.

[0019] This high-efficiency foaming extruder, through an auxiliary mixing device, directs the airflow generated by the blower into the mixing shaft via a transmission pipe, and finally discharges it through the air outlets on the outer wall of the mixing pipe. As the mixing shaft and mixing pipe rotate, these air outlets periodically align with the material area inside the mixing cylinder. This airflow disturbance further breaks up material agglomerations, enhances the contact area between materials and the uniformity of mixing. The combination of physical stirring and airflow disturbance achieves efficient mixing under dual effects, allowing the material to be subjected to shearing and stirring in multiple dimensions, greatly improving mixing efficiency and uniformity. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0021] Figure 2 This is a two-dimensional structural diagram of the present invention from a second angle;

[0022] Figure 3 In this utility model Figure 2 A magnified structural diagram of part A;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the mixing cylinder of this utility model.

[0024] In the diagram: 1. Machine base; 2. Extruder body; 3. Mixing cylinder; 4. Discharge pipe; 5. Valve; 6. Feed pipe; 7. Sealing cover; 8. Mixing shaft; 9. Mixing pipe; 10. Driven bevel gear; 11. Driving bevel gear; 12. Mixing motor; 13. Gear ring; 14. Pinion; 15. Rotating motor; 16. Scraper; 17. Blower; 18. Transmission pipe; 19. Bearing; 20. Air outlet; 21. Micro-through hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 A high-efficiency foaming extruder includes a machine base 1, an extruder body 2, a mixing cylinder 3, a rotating device, a mixing device, and an auxiliary mixing device. The extruder body 2 is mounted on the top wall of the machine base 1. A discharge pipe 4 is mounted on the top of the extruder body 2, and a valve 5 is mounted on the outer wall of the discharge pipe 4. The mixing cylinder 3 is rotatably mounted on the top of the discharge pipe 4. The rotating device is mounted on the outer wall of the mixing cylinder 3. The mixing device is installed inside the mixing cylinder 3. A feed pipe 6 is mounted on the top wall of the mixing cylinder 3, and a sealing cap 7 is threaded onto the top wall of the feed pipe 6. The auxiliary mixing device is mounted on the rear end of the top wall of the mixing cylinder 3. In this embodiment, during use, the sealing cap 7 is opened, and a predetermined proportion of raw materials and foaming agent is added to the mixing cylinder 3 through the feed pipe 6. After closing the sealing cap 7, the rotating device is started to make the mixing cylinder 3 start rotating. This step helps to initially mix the materials, allowing materials of different components to enter the mixing device. Before reaching a relatively uniform state, as the mixing cylinder 3 rotates, the internal mixing device also starts to work. The mixing device rotates in the opposite direction to the downward rotation of the mixing cylinder 3, improving the mixing effect inside the mixing cylinder 3. During the mixing process, the auxiliary mixing device located at the top rear end of the mixing cylinder 3 also participates in the material processing to ensure that the material is mixed more evenly. After being fully mixed, the material enters the extruder body 2 from the mixing cylinder 3 by gravity or with the help of a specific pushing mechanism. Here, the material is heated and shaped, and finally discharged through the discharge pipe 4 to form the desired foamed plastic product. Through the coordinated work of the rotating device, the mixing device, and the auxiliary mixing device, efficient mixing of materials can be achieved, reducing the problem of uneven mixing in traditional methods. More uniform material mixing can significantly improve the quality of the final product, including but not limited to improving the consistency of the foam structure and physical properties. Due to the improved mixing efficiency and optimized product quality, the scrap rate is reduced, thereby reducing production costs.

[0027] Preferably, in this embodiment, the mixing device includes a mixing shaft 8, mixing pipes 9, and a driving device. The mixing shaft 8 is rotatably mounted inside the mixing cylinder 3. Multiple sets of mixing pipes 9 are annularly mounted on the outer wall of the mixing shaft 8. The driving device is mounted on the top of the mixing shaft 8. A predetermined proportion of raw materials and foaming agent are added to the mixing cylinder 3 through the feed pipe 6. The sealing cover 7 should be tightly closed to prevent material leakage or external contamination. The driving device is started, and it transmits power to the mixing shaft 8, causing it to begin rotating. Since multiple sets of mixing pipes 9 are annularly mounted on the outer wall of the mixing shaft 8, the mixing shaft rotates as the mixing shaft rotates. As the mixing shaft 8 rotates, the mixing tube 9 also moves accordingly, stirring and mixing the materials. During the rotation of the mixing shaft 8, the mixing tube 9 can not only break up and mix the materials, but also increase the friction and shear force between the materials, thereby improving the mixing efficiency and uniformity. If necessary, additional ingredients can be added or the mixing parameters can be adjusted through the auxiliary mixing device to adapt to different production needs. The dynamic mixing action generated by the mixing tube 9 rotating with the mixing shaft 8 can effectively break the agglomeration between materials, making the materials of different components more evenly dispersed, greatly improving the mixing effect.

[0028] Preferably, in this embodiment, the driving device includes a driven bevel gear 10, a driving bevel gear 11, and a mixing motor 12. The driven bevel gear 10 is sleeved through the top of the mixing shaft 8 and passes through the top wall of the mixing cylinder 3. The mixing motor 12 is installed at one end of the top wall of the mixing cylinder 3, and the driving bevel gear 11 is installed at the output end of the mixing motor 12. The driving bevel gear 11 and the driven bevel gear 10 are meshed together. When the mixing motor 12 is started by the control system, the mixing motor 12 starts to rotate, driving the driving bevel gear 11, which is directly connected to its output end, to rotate. Since the driving bevel gear 11 meshes with the driven bevel gear 10, the rotational movement of the driving bevel gear 11 is transmitted through the teeth. The interaction force is transmitted to the driven bevel gear 10, causing the driven bevel gear 10 to rotate. The driven bevel gear 10 is fixed to the top of the mixing shaft 8, so its rotation directly causes the mixing shaft 8 to rotate. As the mixing shaft 8 rotates, the multiple sets of mixing pipes 9 installed in the outer ring also start to work, efficiently mixing the material. During the rotation of the mixing shaft 8 and the mixing pipes 9 on it, the material is fully stirred in the mixing cylinder 3, achieving a highly efficient mixing effect and providing excellent raw material conditions for subsequent foaming extrusion. By using the combination of bevel gears, the rotational power of the mixing motor 12 can be effectively converted and transmitted to the mixing shaft 8, achieving high-efficiency power transmission and ensuring the stability and reliability of the mixing process.

[0029] Preferably, in this embodiment, the rotating device includes a gear ring 13, a pinion 14, and a rotating motor 15. The gear ring 13 is sleeved on the outer wall of the mixing cylinder 3, and the rotating motor 15 is installed on the top wall of the extruder body 2. The pinion 14 is installed at the top output end of the rotating motor 15. The pinion 14 and the gear ring 13 are meshed together. When the rotating motor 15 is started by the control system, the rotating motor 15 starts to rotate, driving the pinion 14, which is directly connected to its output end, to rotate. Since the pinion 14 meshes with the gear ring 13, the rotational motion of the pinion 14 is transmitted to the gear ring through the interaction force between the teeth. 13 causes the gear ring 13 to rotate. The gear ring 13 is fixed to the outer wall of the mixing cylinder 3, so its rotation directly causes the overall rotation of the mixing cylinder 3. As the mixing cylinder 3 rotates, the internal materials are initially mixed. The rotation of the mixing cylinder 3, together with the rotation of the internal mixing shaft 8 and its mixing tube 9, achieves full stirring of the materials in different directions, improving mixing efficiency and uniformity. Through the overall rotation of the mixing cylinder 3 plus the rotation of the internal mixing shaft 8, the materials can be subjected to shearing and stirring in multiple dimensions, which greatly improves mixing efficiency and uniformity, and helps to produce higher quality and more stable foam plastic products.

[0030] Preferably, in this embodiment, a scraper 16 is installed at the end of each mixing pipe 9 away from the mixing shaft 8. The scraper 16 is adapted to the inner wall of the mixing cylinder 3. The presence of the scraper 16 can help scrape off the material adhering to the inner wall of the mixing cylinder 3, avoiding the accumulation of material on the cylinder wall and the phenomenon of local unevenness. This allows all materials to participate in the mixing process, thereby improving the overall mixing uniformity. The effective cleaning of the inner wall of the mixing cylinder 3 by the scraper 16 can significantly reduce the amount of material residue in the cylinder after production.

[0031] Preferably, in this embodiment, the auxiliary mixing device includes a blower 17, a transmission pipe 18, a bearing 19, an air outlet 20, and micro-through holes 21. The blower 17 is installed at the rear end of the top wall of the mixing cylinder 3, and the transmission pipe 18 is installed at the air outlet end of the blower 17. The end of the transmission pipe 18 is connected to the top end of the mixing shaft 8 through the bearing 19. Multiple sets of air outlet holes 20 penetrating the transmission pipe 18 are installed on the outer wall of the mixing pipe 9. Multiple sets of micro-through holes 21 are annularly formed on the top wall of the mixing cylinder 3. The blower 17 is started by the control system. When the blower 17 is started, it generates airflow. This airflow is guided into the mixing shaft 8 through the transmission pipe 18. One end of the transmission pipe 18 is connected to the air outlet end of the blower 17, and the other end is connected to the top end of the mixing shaft 8 through the bearing 19, so that the air... The airflow can flow inward along the mixing shaft 8 and eventually be discharged through multiple sets of air outlets 20 on the outer wall of the mixing pipe 9. As the mixing shaft 8 and the mixing pipe 9 rotate, the air outlets 20 will periodically align with the material area inside the mixing cylinder 3. The released airflow can penetrate the material layer, forming local turbulence, further breaking up material agglomerates, enhancing the contact area between materials and the uniformity of mixing. At the same time, the small through holes 21 arranged in a ring on the top wall of the mixing cylinder 3 can prevent excessive pressure inside the mixing cylinder 3 and play a role in pressure relief. In this process, the airflow generated by the blower 17 is combined with the mechanical movement of the mixing shaft 8 and the mixing pipe 9 to act on the material, achieving efficient mixing under the dual effects of physical stirring and airflow disturbance. The addition of airflow provides an additional power source for the material, which helps to break up the agglomeration between materials and improve the mixing efficiency and uniformity.

[0032] Preferably, in this embodiment, all sets of mixing pipes 9 are designed with an inclination. During the rotation process, the inclination of the mixing pipes 9 can more effectively guide the material to move in a specific direction, increase the relative motion speed between the materials, and thus form a stronger turbulence effect. This turbulence helps to break up material agglomeration, so that materials of different components are more evenly dispersed, which greatly improves the mixing efficiency.

[0033] Preferably, in this embodiment, the valve 5 is a solenoid valve. The solenoid valve can achieve precise control of the material flow rate or velocity. By adjusting the current magnitude or pulse width modulation (PWM), the opening degree of the valve 5 can be precisely adjusted to achieve the ideal material flow state.

[0034] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended only as examples, not as limiting the scope of protection of this application.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foaming extruder with high mixing efficiency, comprising a machine base (1), an extruder body (2), a mixing cylinder (3), a rotating device, a mixing device, and an auxiliary mixing device, characterized in that: The extruder body (2) is installed on the top wall of the machine base (1). The top of the extruder body (2) is installed with a discharge pipe (4). A valve (5) is installed on the outer wall of the discharge pipe (4). The mixing cylinder (3) is rotatably installed on the top of the discharge pipe (4). The rotating device is installed on the outer wall of the mixing cylinder (3). The mixing device is installed inside the mixing cylinder (3). The feed pipe (6) is installed on the top wall of the mixing cylinder (3). A sealing cap (7) is threaded on the top wall of the feed pipe (6). The auxiliary mixing device is installed at the rear end of the top wall of the mixing cylinder (3).

2. The foaming extruder with high mixing efficiency according to claim 1, characterized in that: The mixing device includes a mixing shaft (8), a mixing tube (9) and a driving device. The mixing shaft (8) is rotatably installed inside the mixing cylinder (3). Multiple sets of the mixing tubes (9) are installed in a ring on the outer wall of the mixing shaft (8). The driving device is installed at the top of the mixing shaft (8).

3. The foaming extruder with high mixing efficiency according to claim 2, characterized in that: The driving device includes a driven bevel gear (10), a driving bevel gear (11), and a mixing motor (12). The top end of the mixing shaft (8) passes through the top wall of the mixing cylinder (3) and is fitted with the driven bevel gear (10). The mixing motor (12) is installed at one end of the top wall of the mixing cylinder (3). The driving bevel gear (11) is installed at the output end of the mixing motor (12). The driving bevel gear (11) and the driven bevel gear (10) are meshed together.

4. A foaming extruder with high mixing efficiency according to claim 3, characterized in that: The rotating device includes a gear ring (13), a pinion (14) and a rotating motor (15). The gear ring (13) is fitted on the outer wall of the mixing cylinder (3). The rotating motor (15) is installed on the top wall of the extruder body (2). The pinion (14) is installed at the top output end of the rotating motor (15). The pinion (14) and the gear ring (13) are meshed together.

5. A foaming extruder with high mixing efficiency according to claim 4, characterized in that: Each mixing pipe (9) is equipped with a scraper (16) at one end away from the mixing shaft (8), and the scraper (16) is adapted to the inner wall of the mixing cylinder (3).

6. A foaming extruder with high mixing efficiency according to claim 5, characterized in that: The auxiliary mixing device includes a blower (17), a transmission pipe (18), a bearing (19), an air outlet (20), and a micro-through hole (21). The blower (17) is installed at the rear end of the top wall of the mixing cylinder (3). The transmission pipe (18) is installed at the air outlet end of the blower (17). The end of the transmission pipe (18) is connected to the top end of the mixing shaft (8) through the bearing (19). Multiple sets of air outlet holes (20) penetrating the transmission pipe (18) are installed on the outer wall of the mixing pipe (9). Multiple sets of micro-through holes (21) are provided in a ring shape on the top wall of the mixing cylinder (3).

7. A foaming extruder with high mixing efficiency according to claim 6, characterized in that: All of the mixing pipes (9) are designed to be inclined.

8. A foaming extruder with high mixing efficiency according to claim 7, characterized in that: The valve (5) is a solenoid valve.

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