Extrusion device for preparing PP flame-retardant master batch

Abstract

The utility model relates to the technical field of flame-retardant master batch preparation, and discloses an extrusion device for PP flame-retardant master batch preparation, which comprises a base, the upper surface of the base is fixedly connected with a machine body, the upper surface of the machine body is fixedly connected with a machine barrel, one end of the machine barrel is provided with a die head, and a quick release assembly is arranged in the die head; and the quick release assembly comprises a second fixing ball, the second fixing ball is arranged on one side of the outer wall of the mold head, the outer wall of the second fixing ball is fixedly connected with a first fixing ball, the outer wall of the first fixing ball is fixedly connected with a threaded rod, the outer wall of the threaded rod is in threaded connection with a connecting block, and the lower surface of the connecting block is slidably connected with a fixing block. And a fixing hole is formed in the fixing block. According to the utility model, the threaded rod drives the spring and the fixed ball I to synchronously extrude downwards, and the fixed ball II is extruded into the fixed hole, so that the die head is quickly fixed on the outer wall of the machine barrel, and the problems of complicated operation and long consumed time when a die needs to be replaced or the die head needs to be cleaned are solved.

Description

Technical Field

[0001] This utility model relates to the field of flame retardant masterbatch preparation technology, and in particular to an extrusion device for preparing PP flame retardant masterbatch. Background Technology

[0002] Polypropylene (PP) flame-retardant masterbatch is a functional masterbatch commonly used in plastic products. It possesses excellent dispersibility and flame-retardant properties, and is widely used in appliance casings, automotive parts, and wire and cable sheathing. In the production process, PP resin is typically thoroughly mixed with flame retardants, additives, and other raw materials, and then extruded and granulated. The extrusion process is a crucial step in the entire production process, directly affecting the particle size uniformity, appearance quality, and flame-retardant effect of the masterbatch.

[0003] Currently, commonly used PP flame-retardant masterbatch extrusion equipment typically includes a feeding mechanism, a heating and mixing section, a screw extrusion system, and an outlet die. After the raw material enters the barrel through the feeding port, it is heated and softened by the heating device. Simultaneously, the screw propels the material forward, achieving uniform blending through shearing and mixing. Finally, it is formed into thin strips or columnar masterbatch through a die installed at the outlet end, and then cut into granules after cooling. This type of equipment has a mature overall structure and is suitable for the continuous production of various masterbatches. However, the outlet die is usually fixed with bolts, which provides a robust structure but makes replacement relatively cumbersome.

[0004] In current extrusion equipment, the discharge die is typically fixed using screws or flanges. Replacing the die or cleaning the die head is cumbersome and time-consuming, especially when the die is clogged or requires frequent specification changes. This not only affects production efficiency but also increases the workload of operators, hinders daily equipment maintenance and management, and reduces the overall ease of use of the extrusion unit. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an extrusion device for preparing PP flame retardant masterbatch, which aims to improve the problem that existing equipment is fixed by screws or flanges, and the operation is cumbersome and time-consuming when it is necessary to change the mold or clean the die head.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an extrusion device for preparing PP flame retardant masterbatch, comprising a base, a body fixedly connected to the upper surface of the base, a barrel fixedly connected to the upper surface of the body, a die head provided at one end of the barrel, and a quick-release assembly provided inside the die head;

[0007] The quick-release assembly includes a second fixing ball, which is disposed on one side of the outer wall of the mold head. A first fixing ball is fixedly connected to the outer wall of the second fixing ball. A threaded rod is fixedly connected to the outer wall of the first fixing ball. A connecting block is threadedly connected to the outer wall of the threaded rod. A fixing block is slidably connected to the lower surface of the connecting block. A fixing hole is provided inside the fixing block. A spring is provided on the outer wall of the threaded rod. The second fixing ball is disposed inside the fixing hole. A limit ring is provided on the upper surface of the first fixing ball.

[0008] Furthermore, a water tank is provided below the mold head, and a water outlet is provided inside the water tank. A water pump is fixedly connected to the outer wall of the water tank, and a water pipe is fixedly connected to the output end of the water pump. A connecting plate is fixedly connected to one end of the water pipe, and a nozzle is fixedly connected to the lower surface of the connecting plate.

[0009] Furthermore, a motor is fixedly connected to the outer wall of the barrel, an inner liner is provided inside the barrel, and an auger is provided inside the inner liner. One end of the auger is fixedly connected to the output end of the motor.

[0010] Furthermore, a heating element is fixedly connected to the outer wall of the inner liner, and one end of the heating element is electrically connected to a battery.

[0011] Furthermore, the outer wall of the battery is located on one side of the outer wall of the barrel, and a cooling pipe is provided inside the barrel near the mold head.

[0012] Furthermore, a hopper is fixedly connected to the upper surface of the barrel, a second motor is fixedly connected to the upper surface of the hopper, a feed pipe is fixedly connected to the upper surface of the hopper, a stirring rod is provided inside the hopper, the output end of the second motor is fixedly connected to one end of the stirring rod, and a discharge pipe is fixedly connected to the lower surface of the hopper.

[0013] Furthermore, the connecting plate is fixedly connected to one side of the outer wall of the barrel.

[0014] Furthermore, the outer wall of the discharge pipe is located inside the barrel, and a heating element is fixedly connected to the inner wall of the barrel.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, a connecting block that meshes with the top of the threaded rod is inserted into the groove at the top of the threaded rod. By squeezing and rotating the threaded rod, the threaded rod slides upward from inside the connecting block, and the first fixed ball at the bottom of the threaded rod slides upward, causing the second fixed ball to slide out from inside the fixing hole. At the same time, when it is necessary to fix the mold head, the threaded rod is squeezed, and the threaded rod drives the spring and the first fixed ball to squeeze downward in sync, squeezing the second fixed ball into the fixing hole, thereby quickly fixing the mold head on the outer wall of the barrel. This solves the problem of cumbersome operation and long time consumption when it is necessary to change the mold or clean the mold head.

[0017] 2. In this utility model, the water tank is filled with cooling water, and the water pump draws the cooling water through the water pipe and delivers it to the connecting plate. The bottom of the connecting plate is equipped with multiple nozzles to spray the cooling water into a mist, which is evenly sprayed onto the extruded raw material. This ensures that the extruded raw material is heated evenly and maintains its strip or regular shape, making it less prone to collapse, stringing, or sticking. At the same time, the sprayed cooling water falls into the water tank and can be recycled, avoiding waste of water resources. When the cooling water temperature rises and it can no longer complete the cooling work, the heated cooling water can be discharged through the outlet pipe. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an extrusion device for preparing PP flame-retardant masterbatch according to the present invention;

[0019] Figure 2 This is a schematic diagram of the tail structure of an extrusion device for preparing PP flame retardant masterbatch according to the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the barrel of an extrusion device for preparing PP flame retardant masterbatch according to the present invention;

[0021] Figure 4 This is a schematic diagram of one side of the die head of an extrusion device for preparing PP flame retardant masterbatch according to the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the connecting block of an extrusion device for preparing PP flame retardant masterbatch according to the present invention.

[0023] Legend:

[0024] 1. Base; 2. Machine body; 3. Motor 1; 4. Hopper; 5. Motor 2; 6. Feed pipe; 7. Machine barrel; 8. Connecting plate; 9. Water pipe; 10. Water tank; 11. Water outlet; 12. Battery; 13. Stirring rod; 14. Screwdriver; 15. Heating element; 16. Cooling pipe; 17. Mold head; 18. Nozzle; 19. Water pump; 20. Connecting block; 21. Threaded rod; 22. Spring; 23. Fixed ball 1; 24. Fixed ball 2; 25. Fixing hole; 26. Fixing block; 27. Inner liner; 28. Limiting ring; 29. ​​Discharge pipe. 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] Reference Figures 1-5 An embodiment of this utility model is provided: an extrusion device for preparing PP flame retardant masterbatch, including a base 1, a body 2 fixedly connected to the upper surface of the base 1, the body 2 being mainly made of metal and serving as a protective support, a cylinder 7 fixedly connected to the upper surface of the body 2, a die head 17 being provided at one end of the cylinder 7, the die head 17 being mainly used for extruding materials and having the effect of shaping the materials, and a quick-release component being provided inside the die head 17;

[0027] The quick-release assembly includes a second fixed ball 24, which is located on one side of the outer wall of the mold head 17. A first fixed ball 23 is fixedly connected to the outer wall of the second fixed ball 24. The first fixed ball 23 mainly functions to compress and fix the mold head 17. A threaded rod 21 is fixedly connected to the outer wall of the first fixed ball 23. A connecting block 20 is threadedly connected to the outer wall of the threaded rod 21. A fixing block 26 is slidably connected to the lower surface of the connecting block 20. The fixing block 26 is mainly used to place the extruded second fixed ball 24. A fixing hole 25 is opened inside the fixing block 26. A spring 22 is provided on the outer wall of the threaded rod 21. The second fixed ball 24 is located inside the fixing hole 25. A limit ring 28 is provided on the upper surface of the first fixed ball 23.

[0028] Reference Figures 1-5A water tank 10 is located below the mold head 17. The water tank 10 is mainly used to store water and cool the extruded material. A water outlet 11 is opened inside the water tank 10. A water pump 19 is fixedly connected to the outer wall of the water tank 10. The water pump 19 is mainly used to pressurize the water inside the water tank 10 and transmit it to the connecting plate 8. A water pipe 9 is fixedly connected to the output end of the water pump 19. One end of the water pipe 9 is fixedly connected to the connecting plate 8. A nozzle 18 is fixedly connected to the lower surface of the connecting plate 8. The nozzle 18 is mainly used to spray water into a mist to cool the object evenly. A motor 3 is fixedly connected to the outer wall of the barrel 7. An inner liner 27 is set inside the barrel 7. An auger 14 is set inside the inner liner 27. The auger 14 is mainly used to stir and convey the molten material, playing a conveying role. One end of the auger 14 is fixedly connected to the output end of the motor 3. A heating element 15 is fixedly connected to the outer wall of the inner liner 27. The heating element 15 is mainly used to heat the material flowing into the barrel 7. The material is heated and melted to better shape it. One end of the heating element 15 is electrically connected to a battery 12. The outer wall of the battery 12 is located on one side of the outer wall of the barrel 7. A cooling pipe 16 is located inside the barrel 7 near the mold head 17. The cooling pipe 16 is mainly used to cool the molten material to achieve a semi-formed state for better extrusion. A hopper 4 is fixedly connected to the upper surface of the barrel 7. A motor 5 is fixedly connected to the upper surface of the hopper 4. A feed pipe 6 is fixedly connected to the upper surface of the hopper 4. A stirring rod 13 is located inside the hopper 4. The stirring rod 13 is mainly used to mix the material evenly inside the hopper 4 to improve the melting effect. The output end of the motor 5 is fixedly connected to one end of the stirring rod 13. A discharge pipe 29 is fixedly connected to the lower surface of the hopper 4. A connecting plate 8 is fixedly connected to one side of the outer wall of the barrel 7. The outer wall of the discharge pipe 29 is located inside the barrel 7. The heating element 15 is fixedly connected to the inner wall of the barrel 7.

[0029] Working Principle: When using an extrusion device for preparing PP flame-retardant masterbatch, the PP base material, flame retardant, dispersant, and other auxiliary materials are first weighed according to a set ratio and evenly introduced into the hopper 4 through the feed pipe 6. Subsequently, driven by motor 5, the stirring rod 13 begins to rotate. The stirring rod 13 is equipped with multiple layers of stirring blades, which can efficiently disperse and mix the raw materials to form a preliminary uniform mixture. Under the action of gravity, the mixture enters the barrel 7 located in the middle of the device through the discharge pipe 29. During this process, motor 3 starts and drives the auger 14 inside the barrel 7 to rotate continuously. The auger 14 is designed with a spiral propulsion structure, which can continuously push the mixture to the heating section. Multiple sets of heating tubes 15 are provided outside the heating section. The heating tubes 15 are arranged around the barrel 7, which can quickly raise the temperature of the inner liner 27, causing the mixed raw materials to melt and flow. The melted raw materials continue to be pushed to the right side of the barrel 7 by the auger 14, entering the area of ​​the cooling pipe 16. In this area, a cooling liquid circulation chamber is arranged around the inner wall of the cooling pipe 16. The cooling liquid can be circulating water or other cooling media, effectively absorbing the heat of the raw material, causing the raw material to gradually transform from a high-temperature molten state to a viscous semi-formed state. Before entering the die head 17, the raw material already possesses a certain degree of fluidity and plasticity, facilitating subsequent extrusion molding operations. After the raw material passes through the die head 17, the molten mixture is extruded to form a continuous strip structure. The die head 17 is equipped with a replaceable die cavity structure, and different specifications of die can be selected according to different product requirements. When it is necessary to clean or replace the die head 17, a special connecting rod can be used. This connecting rod engages with the groove at the top of the threaded rod 21. The user only needs to rotate the connecting rod to drive the threaded rod 21 to move up and down. During this process, the fixed ball 23 connected to the bottom of the threaded rod 21 slides upward, thereby driving the fixed ball 24 to exit the fixing hole 25, realizing the quick disassembly of the die head 17. Conversely, when it is necessary to reinstall the mold head 17, the threaded rod 21 is pressed down manually or mechanically. With the help of the spring 22, the threaded rod 21 drives the fixed ball 1 23 and the fixed ball 24 to move down synchronously, so that the fixed ball 24 is accurately embedded in the fixed hole 25, thereby achieving a quick and stable connection between the mold head 17 and the outer wall of the barrel 7.

[0030] In addition, to improve the cooling efficiency of the extruded raw material, the water tank 10 is pre-filled with cooling water, and the water is pumped and transported to the interior of the connecting plate 8 by the water pump 19. Multiple nozzles 18 are installed at the bottom of the connecting plate 8. These nozzles atomize the cooling water and spray it evenly onto the surface of the freshly extruded raw material strip, rapidly cooling it and maintaining its shape stability. The sprayed cooling water naturally flows back to the water tank 10 along the outer surface of the device, achieving closed-loop circulation and saving water resources. When the temperature of the cooling water in the water tank 10 gradually rises to a set threshold, to prevent a decrease in cooling effect, the high-temperature cooling water can be discharged in time through the water outlet 11, and new coolant can be added, thereby maintaining the effective operation and stable function of the entire cooling system.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An extrusion apparatus for preparing PP flame retardant masterbatch, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected to the body (2), the upper surface of the body (2) is fixedly connected to the cylinder (7), one end of the cylinder (7) is provided with a mold head (17), and the mold head (17) is provided with a quick-release component inside; The quick-release assembly includes a second fixed ball (24), which is disposed on one side of the outer wall of the mold head (17). A first fixed ball (23) is fixedly connected to the outer wall of the second fixed ball (24). A threaded rod (21) is fixedly connected to the outer wall of the first fixed ball (23). A connecting block (20) is threadedly connected to the outer wall of the threaded rod (21). A fixing block (26) is slidably connected to the lower surface of the connecting block (20). A fixing hole (25) is provided inside the fixing block (26). A spring (22) is provided on the outer wall of the threaded rod (21). The second fixed ball (24) is disposed inside the fixing hole (25). A limit ring (28) is provided on the upper surface of the first fixed ball (23).

2. The extrusion apparatus for preparing PP flame retardant masterbatch according to claim 1, characterized in that: A water tank (10) is provided below the mold head (17). A water outlet (11) is provided inside the water tank (10). A water pump (19) is fixedly connected to the outer wall of the water tank (10). A water pipe (9) is fixedly connected to the output end of the water pump (19). A connecting plate (8) is fixedly connected to one end of the water pipe (9). A nozzle (18) is fixedly connected to the lower surface of the connecting plate (8).

3. The extrusion apparatus for preparing PP flame retardant masterbatch according to claim 1, characterized in that: The outer wall of the barrel (7) is fixedly connected to a motor (3), and an inner liner (27) is provided inside the barrel (7). An auger (14) is provided inside the inner liner (27), and one end of the auger (14) is fixedly connected to the output end of the motor (3).

4. The extrusion apparatus for preparing PP flame retardant masterbatch according to claim 3, characterized in that: A heating element (15) is fixedly connected to the outer wall of the inner liner (27), and a battery (12) is electrically connected to one end of the heating element (15).

5. The extrusion apparatus for preparing PP flame retardant masterbatch according to claim 4, characterized in that: The outer wall of the battery (12) is located on one side of the outer wall of the barrel (7), and a cooling pipe (16) is provided inside the barrel (7) on the side near the mold head (17).

6. The extrusion apparatus for preparing PP flame retardant masterbatch according to claim 1, characterized in that: A hopper (4) is fixedly connected to the upper surface of the barrel (7), a motor (5) is fixedly connected to the upper surface of the hopper (4), a feed pipe (6) is fixedly connected to the upper surface of the hopper (4), a stirring rod (13) is provided inside the hopper (4), the output end of the motor (5) is fixedly connected to one end of the stirring rod (13), and a discharge pipe (29) is fixedly connected to the lower surface of the hopper (4).

7. An extrusion apparatus for preparing PP flame retardant masterbatch according to claim 2, characterized in that: The connecting plate (8) is fixedly connected to one side of the outer wall of the barrel (7).

8. An extrusion apparatus for preparing PP flame retardant masterbatch according to claim 6, characterized in that: The outer wall of the discharge pipe (29) is set inside the barrel (7), and a heating tube (15) is fixedly connected to the inner wall of the barrel (7).

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