Extrusion tabletting device for powder coating production

Abstract

The utility model relates to powder coating production technical field discloses a kind of extrusion tabletting device for powder coating production, including rack, first installation box being located in the one side of rack, valve assembly and screw rod drive box being located in the top of rack, and extrusion mechanism connected with screw rod drive box. The feeding hopper is equipped above the extrusion mechanism, which is connected with guide hopper by pipe with stirring shaft;Screw rod drive box is powered by the second motor of rack bottom through belt, and double extrusion screw rod is driven synchronous rotation in extruder barrel by turbine transmission pair;Valve assembly includes first, second and third control valve respectively controlling heating section, material conveying section and cooling water path;Double water-cooling roller driven by independent motor is equipped in first installation box, for cooling and tableting extruded strip. The device realizes integrated continuous production from feeding, mixing to extrusion tableting, with the advantages of uniform extrusion, accurate control and stable operation.

Description

Technical Field

[0001] The utility model relates to the technical field of powder coating production, and discloses an extrusion and tablet pressing device for powder coating production. Background Art

[0002] The extrusion and tablet pressing of powder coatings are the core links in the production process, and their effects directly affect the mixing uniformity, melting quality of the coatings and the performance of the final products. At present, common production devices mostly use segmented and independent equipment to complete premixing, melt extrusion and cooling and tablet pressing. For example, a single-screw extruder is first used for plasticization, and then shaping is carried out through an independent tablet press or a cooling belt.

[0003] However, in the research and development process of the present utility model, it is found that such production solutions in the prior art have obvious limitations. First of all, the dispersed processes lead to frequent material transfer, which not only has low efficiency, but may also introduce contamination, and it is difficult to achieve continuous automated production. Secondly, the key extrusion section mostly adopts a single-screw structure, and its mixing and shearing capabilities are limited, and it is difficult to achieve an ideal mixing effect for powder coatings that require high uniformity; even if a double-screw is used, its complex synchronous drive system is often large in structure and high in cost. Moreover, the temperature and pressure control during the extrusion process, as well as the start and stop of the cooling process, mostly rely on manual experience or simple mechanical adjustment, and it is impossible to achieve precise linkage control, and it is difficult to ensure the stability of the performance of different batches of products. Although there are also production lines with higher integration degrees on the market, they are usually expensive in cost, complex in structure, and have not effectively solved the problem of integrated integration of efficient synchronous drive of double screws and rapid cooling and tablet pressing in a compact space.

[0004] In summary, the prior art lacks an integrated solution for powder coating extrusion and tablet pressing with a compact structure design, which can simultaneously achieve efficient double-screw synchronous extrusion, precise linkage control of process parameters and moderate cost. Therefore, there is an urgent need for an innovative integrated structure and control solution to overcome the deficiencies of the prior art and meet the higher requirements for high efficiency, high uniformity and automated control in modern powder coating production. Content of the Utility Model

[0005] The utility model discloses an extrusion and tablet pressing device for powder coating production, which can realize continuous integrated extrusion of materials and synchronous tablet pressing and forming, and has the function of segmented precise control of extrusion pressure and temperature, greatly improving the production continuity and product uniformity, significantly optimizing the controllability and stability of the process, and at the same time effectively solving the systematic problems of equipment dispersion, poor double-screw synchronism, low cooling and forming efficiency and inability to independently adjust process parameters in the traditional production process.

[0006] To achieve the above objectives, this utility model provides an extrusion and tableting device for powder coating production, comprising a frame and a first mounting box fixedly installed on one side of the frame, characterized in that: The first mounting box contains a first water-cooled roller and a second water-cooled roller installed side by side; a valve assembly and a screw drive box are fixedly installed at the top of the frame; the right side of the screw drive box is fixedly connected to an extrusion mechanism; the upper end of the extrusion mechanism is provided with a feed hopper, and the lower end of the feed hopper is connected to a through pipe; A first motor is fixedly installed at the left end of the tube, and a guide hopper is connected to the right end. The bottom end of the guide hopper is connected to the upper end of the extrusion mechanism. A second mounting box is provided at the left end of the screw drive box, and a large pulley is provided inside the second mounting box. A second motor is fixedly installed at the bottom of the frame, and a small pulley is fixedly connected to the drive shaft of the second motor. The small pulley and the large pulley are connected by belt drive.

[0007] Preferably, the screw drive box includes a first drive shaft, a second drive shaft, a first extrusion screw, and a second extrusion screw; One end of the first drive shaft is fixedly connected to the large pulley, and the first drive shaft is provided with a first gear; the second drive shaft is provided with a second gear, a third gear and a fifth gear; the first extrusion screw is provided with a fourth gear, and the second extrusion screw is provided with a sixth gear; The first gear meshes with the second gear, the third gear meshes with the fourth gear, and the fifth gear meshes with the sixth gear.

[0008] Preferably, the valve assembly includes a first control valve, a second control valve, a first outlet connection seat, and a second outlet connection seat; The first control valve, the second control valve, the first outlet connection seat, and the second outlet connection seat are arranged in sequence and fixedly connected, and are installed together on the top of the frame.

[0009] Preferably, the right side of the extrusion mechanism is provided with a first connecting hole and a second connecting hole; The first connection hole is connected to the first control valve through a first air pipe, and the second connection hole is connected to the second control valve through a second air pipe; The first water outlet connector is connected to the first through hole at one end of the first water-cooled roller via a first cooling water pipe, and the second water outlet connector is connected to the second through hole at one end of the second water-cooled roller via a second cooling water pipe.

[0010] Preferably, a third motor is fixedly installed at one end of the first water-cooling roller, and a fourth motor is fixedly installed at one end of the second water-cooling roller; A water tank is also provided below the frame, and the water tank is connected to the first water outlet connector and the second water outlet connector respectively through the third cooling water pipe and the fourth cooling water pipe.

[0011] Preferably, the first mounting box also has an opening.

[0012] Preferably, a stirring shaft is installed inside the pipe; One end of the stirring shaft is connected to the output shaft of the first motor, and the other end extends into and passes through the guide hopper; The bottom of the feed hopper is connected to the extruder barrel inside the extrusion mechanism.

[0013] Preferably, the extrusion mechanism includes a pushing section, a heating section, and a conveying section arranged sequentially along the material conveying direction; The upper end of the pushing section is provided with the guide hopper; The pushing section, heating section, and conveying section are sequentially connected and intersected by the extruder barrel.

[0014] Preferably, the ends of the first extrusion screw and the second extrusion screw are disposed inside the extruder barrel.

[0015] Preferably, the valve assembly further includes a third control valve, which is disposed on one side of the second outlet connection seat.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model include at least the following: This invention employs a twin-screw extrusion structure driven by a single motor and synchronously transmitted via gear pairs. Combined with valve assemblies that independently control heating, extrusion, and cooling, it achieves efficient and uniform melt extrusion of powder coating materials and real-time, precise, segmented adjustment of process parameters. This solves the process problems of uneven mixing, high energy consumption, and large product quality fluctuations caused by the separation of processes and coarse control in traditional equipment. Furthermore, the comprehensive design, incorporating a high-efficiency cooling and pressing unit composed of dual water-cooled rollers, an integrated screw drive box structure, and a through-tube premixing feeding mechanism, greatly optimizes the compactness, continuity, and operational integration of the overall machine structure. This not only significantly improves production efficiency and product uniformity from raw materials to finished flakes, reducing intermediate transfers and human intervention, but also, with its integrated process design, synchronous and stable extrusion characteristics, and segmented controllable process system, provides a highly continuous, precisely controlled, efficient, and compact integrated extrusion and pressing equipment option for modern powder coating production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a front view of the overall structure of the device of this utility model; Figure 2 This is a side view of the overall structure of the device of this utility model; Figure 3 This is a structural diagram of the internal structure of the screw drive box of this utility model; Figure 4 This is a schematic diagram of the valve assembly connection of this utility model; Figure 5 This is a schematic diagram of the water tank connection of this utility model; Figure 6 This is a schematic diagram of the pipe structure of this utility model.

[0019] In the diagram: 1. Frame; 2. First water-cooled roller; 3. Second water-cooled roller; 4. First mounting box; 5. Feed hopper; 6. Guide hopper; 7. First motor; 8. Screw drive box; 9. Extrusion mechanism; 10. Second mounting box; 11. Belt; 12. Second motor; 13. First drive shaft; 14. Valve assembly; 15. First connecting hole; 16. Extruder barrel; 17. Large pulley; 18. Small pulley; 19. First air pipe; 20. Second air pipe; 21. First cooling water pipe; 22. Second cooling water pipe; 23. Water tank; 24. Third cooling water pipe; 25. Fourth cooling water pipe; 26. Third motor; 27. Fourth motor; 28. Mixer Shaft; 29, Through pipe; 30, Second connecting hole; 201, First through hole; 301, Second through hole; 401, Opening; 801, First extrusion screw; 802, Second extrusion screw; 803, First drive shaft; 804, First gear; 805, Second gear; 806, Third gear; 807, Fourth gear; 808, Fifth gear; 809, Sixth gear; 810, Second drive shaft; 901, Heating section; 902, Conveying section; 903, Pushing section; 1401, First control valve; 1402, Second control valve; 1403, Third control valve; 1404, First water outlet connection seat; 1405, Second water outlet connection seat. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In this application, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0022] Example 1 In the powder coating production field, achieving efficient and uniform melt extrusion and precise control of the molding process are core requirements for improving coating quality and production efficiency. However, existing technologies, which rely on segmented and independent premixing, single-screw extrusion, and cooling and pressing, can complete the basic processing flow, but generally suffer from inherent defects such as poor process connection and limited mixing uniformity. While simple mechanical temperature and pressure control schemes are straightforward in structure, they struggle to achieve real-time coordination and adaptive adjustment of process parameters, resulting in large fluctuations in product quality, high energy consumption, and strong reliance on operator experience. Although some integrated production lines attempt to optimize the process through complex electromechanical structures, they often lead to large system footprints and high manufacturing costs, and fail to fundamentally solve the technical challenges of integrating "twin-screw synchronous extrusion," "segmented independent control," and "rapid cooling and pressing." This makes it difficult to balance key indicators such as production continuity, control precision, structural compactness, and cost-effectiveness, failing to meet the increasingly stringent requirements of modern powder coating production for high efficiency, uniformity, and automated control.

[0023] Therefore, this application provides an extrusion and tableting apparatus for powder coating production, such as... Figures 1 to 6 As shown, it includes: Frame 1 and first mounting box 4: The frame 1 is the supporting structure for the entire device. The first mounting box 4 is fixedly mounted on one side (e.g., the right side) of the frame 1. Inside the first mounting box 4, the first water-cooling roller 2 and the second water-cooling roller 3 are mounted side by side. The first mounting box 4 is also provided with an opening 401.

[0024] Valve assembly 14 and screw drive box 8: Both the valve assembly 14 and the screw drive box 8 are fixedly installed on the top of the frame 1.

[0025] Extrusion mechanism 9 and its connection: The extrusion mechanism 9 is fixedly connected to the right side of the screw drive box 8. A feed hopper 5 is provided at the upper end of the extrusion mechanism 9.

[0026] Feeding and premixing passage: The lower end of the feed hopper 5 is connected to a through pipe 29. The left end of the through pipe 29 is fixedly installed with a first motor 7, and the right end is connected to a guide hopper 6. The bottom end of the guide hopper 6 is connected to the upper end of the extrusion mechanism 9, thereby connecting the feed hopper 5, the through pipe 29, the guide hopper 6, and the internal channel of the extrusion mechanism 9.

[0027] Power input and transmission structure: A second mounting box 10 is provided at the left end of the screw drive box 8. A large pulley 17 is provided inside the second mounting box 10. A second motor 12 is fixedly mounted at the bottom of the frame 1. A small pulley 18 is fixedly connected to the drive shaft 13 of the second motor 12. The small pulley 18 and the large pulley 17 are connected by a belt 11 for transmission.

[0028] Internal structure of screw drive box 8 (see [link]) Figure 3 The screw drive housing 8 includes a first drive shaft 803, a second drive shaft 810, a first extrusion screw 801, and a second extrusion screw 802. The left end of the first drive shaft 803 is fixedly connected to the large pulley 17, and a first gear 804 is mounted on it. The second drive shaft 810 is equipped with a second gear 805, a third gear 806, and a fifth gear 808. The first extrusion screw 801 is equipped with a fourth gear 807, and the second extrusion screw 802 is equipped with a sixth gear 809. The first gear 804 meshes with the second gear 805, the third gear 806 meshes with the fourth gear 807, and the fifth gear 808 meshes with the sixth gear 809.

[0029] Internal structure of extrusion mechanism 9: The extrusion mechanism 9 is provided with an extruder barrel 16, which includes, along the material direction, a pushing section 903, a heating section 901, and a conveying section 902 that are interconnected. The first extrusion screw 801 and the second extrusion screw 802 are disposed inside the extruder barrel 16.

[0030] The configuration and connection of valve assembly 14 (see [link]). Figure 4 The valve assembly 14 includes a first control valve 1401, a second control valve 1402, a first water outlet connector 1404, a second water outlet connector 1405, and a third control valve 1403, arranged sequentially and fixedly connected. A first connecting hole 15 and a second connecting hole 30 are provided on the right side of the extrusion mechanism 9. The first connecting hole 15 is connected to the first control valve 1401 via a first air pipe 19, and the second connecting hole 30 is connected to the second control valve 1402 via a second air pipe 20. The first water outlet connector 1404 is connected to a first through hole 201 at one end of the first water-cooled roller 2 via a first cooling water pipe 21, and the second water outlet connector 1405 is connected to a second through hole 301 at one end of the second water-cooled roller 3 via a second cooling water pipe 22.

[0031] Water-cooled roller drive and water source (see [link]) Figure 5 A third motor 26 is fixedly installed at one end of the first water-cooled roller 2, and a fourth motor 27 is fixedly installed at one end of the second water-cooled roller 3. A water tank 23 is also provided below the frame 1. The water tank 23 is connected to the first water outlet connector 1404 and the second water outlet connector 1405 through the third cooling water pipe 24 and the fourth cooling water pipe 25, respectively.

[0032] Internal structure of pipe 29 (see Figure 6 A stirring shaft 28 is installed inside the through pipe 29. One end of the stirring shaft 28 is connected to the output shaft of the first motor 7, and the other end extends into and passes through the inside of the guide hopper 6.

[0033] System workflow Feeding and premixing: Add the powder coating raw materials to the feed hopper 5. Start the first motor 7 to drive the stirring shaft 28 to rotate, and stir and convey the raw materials passing through the pipe 29, so that they are evenly fed into the extruder barrel 16 of the extrusion mechanism 9 through the guide hopper 6.

[0034] Power drive and screw transmission: When the second motor 12 is started, power is transmitted to the large pulley 17 via the small pulley 18 and the belt 11, driving the first drive shaft 803 inside the screw drive box 8 to rotate. Power is transmitted to the second drive shaft 810 through the meshing of the first gear 804 and the second gear 805, and then through the meshing of the third gear 806 and the fourth gear 807, and the meshing of the fifth gear 808 and the sixth gear 809, synchronously driving the first extrusion screw 801 and the second extrusion screw 802 to rotate in the same direction inside the extruder barrel 16.

[0035] Melt extrusion: The material entering the extruder barrel 16 is conveyed by a rotating screw. In the heating section 901, the material is heated and melted by a heat medium controllable by a first control valve 1401, and then sheared and mixed by the screw. In the conveying section 902, the material is further homogenized and pressurized, and its extrusion speed can be adjusted by a second control valve 1402. Finally, the molten material is continuously extruded.

[0036] Cooling and pressing: The extruded high-temperature strip falls through the opening 401 into the gap between the first water-cooled roller 2 and the second water-cooled roller 3. At this time, the third control valve 1403 opens, and cooling water flows from the water tank 23 through the pipeline to the first 1404 and the second water outlet connection seat 1405, and then enters the internal circulation of the water-cooled roller through the first 21 and the second cooling water pipe 22. At the same time, the third motor 26 and the fourth motor 27 drive the two water-cooled rollers to rotate in opposite directions, rapidly cooling the strip and pressing it into a continuous sheet.

[0037] Material discharge: The formed sheet is fed out between two water-cooled rollers, completing the entire production process.

[0038] In summary, this embodiment, by employing a dual-screw extrusion system driven by a single motor and synchronously transmitted via gear pairs, and integrating valve assemblies 14 that independently control heating, extrusion, and cooling, combined with a premixing mechanism with an internal stirring shaft 28 in the pipe 29, and a dual-roller tableting device driven by an independent motor and equipped with a built-in water-cooling channel, achieves a series of significant beneficial effects: It successfully realizes integrated continuous production of powder coatings from raw material feeding, melt mixing to cooling and tableting, effectively solving the systemic problems of dispersed equipment, poor process connection, poor synchronization of the dual screws, and inability to independently and accurately control process parameters in traditional production processes; simultaneously, it greatly optimizes the compactness, automation level, and operational stability of the production line, significantly improving product uniformity, production efficiency, and batch consistency, reducing energy consumption and manual intervention intensity; and, with its integrated design, synchronous and stable extrusion characteristics, and segmented controllable process system, it provides a continuous, efficient, precisely controlled, stable, and compact integrated extrusion and tableting equipment option for modern powder coating production.

[0039] Example 2 This embodiment is a further refinement of Embodiment 1, focusing on a detailed description of the specific internal transmission structure of the screw drive box 8. Except as specifically stated below, the other components, connections, and operating procedures of the device in this embodiment are the same as in Embodiment 1.

[0040] Please see Figure 3 In this embodiment, the internal transmission structure of the screw drive box 8 is as follows: The screw drive housing 8 includes a housing, inside which a first drive shaft 803 and a second drive shaft 810 are disposed. The left end of the first drive shaft 803 serves as the power input end, passing through the left side wall of the housing and fixedly connected to the large pulley 17. A first gear 804 is fixedly disposed on this shaft. A second gear 805, a third gear 806, and a fifth gear 808 are fixedly disposed on the second drive shaft 810.

[0041] The left drive end of the first extrusion screw 801 extends into the screw drive housing 8, and a fourth gear 807 is fixedly mounted thereon. The left drive end of the second extrusion screw 802 extends into the screw drive housing 8, and a sixth gear 809 is fixedly mounted thereon.

[0042] The specific meshing transmission relationship between the gears is as follows: The first gear 804 meshes with the second gear 805.

[0043] The third gear 806 meshes with the fourth gear 807.

[0044] The fifth gear 808 meshes with the sixth gear 809.

[0045] The transmission path is as follows: The power of the second motor 12 is transmitted to the large pulley 17 via the belt 11, driving the first drive shaft 803 and its first gear 804 to rotate. The first gear 804 drives the second gear 805 meshing with it, thereby causing the second drive shaft 810 to rotate. The second drive shaft 810 drives the third gear 806 and the fifth gear 808 on it to rotate synchronously. The third gear 806 drives the fourth gear 807, thereby driving the first extrusion screw 801 to rotate; at the same time, the fifth gear 808 drives the sixth gear 809, thereby driving the second extrusion screw 802 to rotate.

[0046] Through the above-described specific transmission structure, this utility model achieves the following key effects: Strictly synchronized drive: Since the third gear 806 and the fifth gear 808 are fixed on the same second drive shaft 810, their rotational speed and direction are exactly the same at all times, thus ensuring that the first and second extrusion screws (801, 802) driven by them have absolutely synchronized, unidirectional, and equal-speed rotational motion. This is the fundamental guarantee for achieving uniform shearing, mixing, and stable conveying of materials within the extruder barrel 16.

[0047] High Torque and Motion Self-Locking: The transmission system composed of the aforementioned gear set has a large reduction ratio, which can convert the high-speed, low-torque of the motor into the low-speed, high-torque required by the extrusion screw. Simultaneously, this gear transmission mechanism has an inherent reverse self-locking characteristic. When the power input stops, the reverse pressure of the material inside the extruder barrel 16 cannot drive the extrusion screw to reverse, thus preventing the gears and motor from reversing. This characteristic effectively prevents material backflow during shutdown, ensuring equipment and process safety, and facilitating start-up and shutdown control of the production process.

[0048] In summary, the internal transmission structure of the screw drive box described in detail in this embodiment provides a synchronous, high-torque, and self-locking power transmission solution for the core twin-screw extrusion function through a precision transmission chain consisting of a first transmission shaft 803, a second transmission shaft 810, and multiple sets of gears. This is one of the key mechanical innovations of this invention in achieving efficient, uniform, and stable extrusion.

[0049] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0051] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An extrusion and tableting device for powder coating production, comprising a frame (1) and a first mounting box (4) fixedly installed on one side of the frame (1), characterized in that: The first mounting box (4) has a first water-cooled roller (2) and a second water-cooled roller (3) installed side by side inside; the top of the frame (1) is fixedly installed with a valve assembly (14) and a screw drive box (8); the right side of the screw drive box (8) is fixedly connected to an extrusion mechanism (9); the upper end of the extrusion mechanism (9) is provided with a feed hopper (5), and the lower end of the feed hopper (5) is connected to a through pipe (29). The left end of the tube (29) is fixedly equipped with a first motor (7), and the right end is connected to a guide hopper (6). The bottom end of the guide hopper (6) is connected to the upper end of the extrusion mechanism (9). The left end of the screw drive box (8) is provided with a second mounting box (10), and a large pulley (17) is provided inside the second mounting box (10). A second motor (12) is fixedly installed at the bottom of the frame (1). A small pulley (18) is fixedly connected to the first drive shaft (13) of the second motor (12). The small pulley (18) and the large pulley (17) are connected by a belt (11).

2. The extrusion and tableting apparatus for powder coating production according to claim 1, characterized in that, The screw drive box (8) includes a first drive shaft (803), a second drive shaft (810), a first extrusion screw (801), and a second extrusion screw (802). One end of the first drive shaft (803) is fixedly connected to the large pulley (17). The first drive shaft (803) is provided with a first gear (804); the second drive shaft (810) is provided with a second gear (805), a third gear (806) and a fifth gear (808); the first extrusion screw (801) is provided with a fourth gear (807), and the second extrusion screw (802) is provided with a sixth gear (809). The first gear (804) meshes with the second gear (805), the third gear (806) meshes with the fourth gear (807), and the fifth gear (808) meshes with the sixth gear (809).

3. The extrusion and tableting apparatus for powder coating production according to claim 1, characterized in that, The valve assembly (14) includes a first control valve (1401), a second control valve (1402), a first outlet connection seat (1404), and a second outlet connection seat (1405). The first control valve (1401), the second control valve (1402), the first water outlet connector (1404) and the second water outlet connector (1405) are arranged in sequence and fixedly connected, and are installed together on the top of the frame (1).

4. The extrusion and tableting apparatus for powder coating production according to claim 3, characterized in that, The right side of the extrusion mechanism (9) is provided with a first connecting hole (15) and a second connecting hole (30). The first connection hole (15) is connected to the first control valve (1401) through the first air pipe (19), and the second connection hole (30) is connected to the second control valve (1402) through the second air pipe (20); The first water outlet connector (1404) is connected to the first through hole (201) at one end of the first water-cooled roller (2) through the first cooling water pipe (21), and the second water outlet connector (1405) is connected to the second through hole (301) at one end of the second water-cooled roller (3) through the second cooling water pipe (22).

5. The extrusion and tableting apparatus for powder coating production according to claim 4, characterized in that, A third motor (26) is fixedly installed at one end of the first water-cooled roller (2), and a fourth motor (27) is fixedly installed at one end of the second water-cooled roller (3). A water tank (23) is also provided below the frame (1). The water tank (23) is connected to the first water outlet connector (1404) and the second water outlet connector (1405) respectively through the third cooling water pipe (24) and the fourth cooling water pipe (25).

6. The extrusion and tableting apparatus for powder coating production according to claim 1, characterized in that, The first mounting box (4) is also provided with an opening (401).

7. The extrusion and tableting apparatus for powder coating production according to claim 2, characterized in that, The stirring shaft (28) is installed inside the through pipe (29); One end of the stirring shaft (28) is connected to the output shaft of the first motor (7), and the other end extends into and passes through the guide hopper (6). The bottom of the feed hopper (6) is connected to the extruder barrel (16) inside the extrusion mechanism (9).

8. The extrusion and tableting apparatus for powder coating production according to claim 7, characterized in that, The extrusion mechanism (9) includes a pushing section (903), a heating section (901) and a conveying section (902) arranged sequentially along the material conveying direction. The upper end of the pushing section (903) is provided with the guide hopper (6). The pushing section (903), heating section (901) and conveying section (902) are connected and run through the extruder barrel (16) in sequence.

9. The extrusion and tableting apparatus for powder coating production according to claim 8, characterized in that, The ends of the first extrusion screw (801) and the second extrusion screw (802) are disposed inside the extruder barrel (16).

10. The extrusion and tableting apparatus for powder coating production according to claim 3, characterized in that, The valve assembly (14) further includes a third control valve (1403), which is disposed on one side of the second outlet connection seat (1405).

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