Extrusion equipment for producing modified polyphenylene sulfide fibers

Abstract

The invention discloses extrusion equipment for producing modified polyphenylene sulfide fibers, and relates to the field of extrusion equipment.The extrusion equipment comprises an extruder and two feeding boxes, the two feeding boxes are connected with feeding pipes, the feeding pipes are connected to the extruder, the feeding boxes are provided with stirring motors, and the stirring motors are connected to the extruder. A stirring shaft is mounted on an output shaft of the stirring motor, and a plurality of stirring frames located in the feeding box are mounted on the stirring shaft; and a preheating material box is mounted on the feeding box. It needs to be explained that raw materials are preliminarily melted into melt through pre-melting, stable melt feeding can be achieved, fluctuation of solid particle feeding is eliminated, preheating plate filtering in the pre-melting stage can intercept impurities in the low-temperature pre-melting state with high melt viscosity, the finished product rate is increased, the impurities can be cleaned through switching of the double feeding hoppers without shutdown, and the production efficiency is improved. The non-production time is shortened, non-stop impurity cleaning and feeding switching can be achieved, and continuous production is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of extrusion equipment technology, and in particular to an extrusion equipment for the production of modified polyphenylene sulfide fibers. Background Technology

[0002] Modified polyphenylene sulfide (PPS) fiber, or modified PPS fiber for short, is a high-performance fiber material made by optimizing the structure or enhancing the performance of polyphenylene sulfide (PPS) resin through chemical or physical methods. Its core objective is to improve the limitations of PPS in specific applications while retaining its original properties such as high-temperature resistance, chemical corrosion resistance, and flame retardancy. For example, it aims to improve dyeability, moisture absorption, oxidation resistance, or mechanical properties. After mixing and drying, the modified PPS raw material is fed into a screw extruder. The extruder melts the solid modified PPS raw material into a homogeneous melt through the rotation and shearing of the screw and the heating of the barrel. This melt is then continuously and stably transported to the spinning assembly, ultimately producing modified PPS fiber.

[0003] Furthermore, PPS fibers are mainly produced using melt spinning, which involves heating and melting solid polymers into a viscous flow state, then extruding them through spinnerets to form fine streams, and finally processing them into fibers through cooling, stretching, and winding. The extruder is the key equipment for realizing the core steps of melting, plasticizing, mixing, and conveying the melt. It should be noted that during production, conventional screw extruders, when directly feeding modified PPS particles, are prone to agglomeration and bridging, leading to feed fluctuations. This results in unstable extrusion volume, large deviations in fiber linear density, and difficulty in efficiently removing impurities from the raw material. In the production of modified PPS fibers, the raw material may be mixed with mechanical impurities, such as metal scraps, glass fiber fragments, or thermal aging impurities, such as cross-linked agglomerates formed during storage. The filtration devices in conventional extruders are mostly located in the melt section, and impurities can easily clog the filter screen, causing shutdowns. Prolonged exposure to high temperatures can lead to deterioration of the raw material. Although PPS has good heat resistance, it will undergo thermal degradation when exposed to temperatures above the melting point for extended periods, resulting in a decrease in molecular weight and deterioration of fiber mechanical properties. In addition, once impurities clog the traditional single-channel feeding system, the machine must be stopped for disassembly and cleaning, reducing production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an extrusion device for the production of modified polyphenylene sulfide fibers, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An extrusion device for producing modified polyphenylene sulfide fiber includes an extruder and two feed boxes. The two feed boxes are connected to feed pipes, which are connected to the extruder. A stirring motor is installed on the feed box, and a stirring shaft is installed on the output shaft of the stirring motor. Multiple stirring frames located inside the feed box are installed on the stirring shaft. A preheating hopper is installed on the feed hopper, and a multi-stage pre-melting device is installed inside the preheating hopper. The multi-stage pre-melting device is used to preheat and pre-melt the raw materials. The multi-stage pre-melting device includes a pre-melting cylinder, which is movably installed inside the preheating hopper. A terminal melting plate is movably installed on the bottom side of the pre-melting cylinder, and multiple staged preheating plates are installed inside the pre-melting cylinder. A discharge cylinder is installed on the bottom side of the preheating hopper, and the pre-melting cylinder is inserted into the discharge cylinder. It also includes a discharge switching device, which is installed on the feed pipe. Both feed boxes are connected to the discharge switching device, which is used to switch between the two feed boxes. The discharge switching device includes a switching feed pipe, which is installed on the feed pipe. Both discharge cylinders are connected to the switching feed pipe. Two positioning sealing plates are installed inside the switching feed pipe, and two movable sealing plates are movably installed inside the switching feed pipe. The movable sealing plates move down to cooperate with the positioning sealing plates to close one side of the switching feed pipe.

[0007] Furthermore, in a preferred embodiment of the present invention, the multi-stage pre-melting device further includes two synchronous sealing plates, each of which is movably mounted with two limiting rods. The limiting rods are installed on the inner wall of the preheating hopper, and the two synchronous sealing plates are close to each other to close the feed hopper. A push spring is installed at one end of the limiting rod, and the push spring is installed on the inner wall of the synchronous sealing plate.

[0008] Furthermore, in a preferred embodiment of the present invention, a sinking seat is installed on both inner walls of the preheating hopper, and a sinking slider is installed on both sides of the premelting cylinder, with the two sinking sliders slidably installed in the two sinking seats respectively. A support spring is installed on the inner wall of the sinking seat, and the support spring is mounted on the sinking slider.

[0009] Furthermore, in a preferred embodiment of the present invention, a mounting shaft is rotatably mounted on one side of each of the two recessed seats, and a V-shaped push rod is mounted on each of the two mounting shafts; Both of the two synchronous sealing plates are equipped with a closed pusher, and both of the two V-shaped push rods are equipped with a linkage shaft. The two linkage shafts are respectively movably installed inside the two closed pushers. Each of the two sinking sliders is equipped with a pressure shaft on one side. The sinking slider drives the pressure shaft to move downward, which is used to squeeze the V-shaped push rod to rotate.

[0010] Furthermore, in a preferred embodiment of the present invention, the bottom end of the stirring shaft extends into the pre-melting cylinder, and a plurality of discharge rotating rods for pushing raw materials are installed on the stirring shaft, and the plurality of discharge rotating rods are all located inside the pre-melting cylinder.

[0011] Furthermore, in a preferred embodiment of the present invention, the discharge switching device further includes a rotating switching frame, an intermediate support rod is installed on the switching feed pipe, and the rotating switching frame is rotatably mounted on the intermediate support rod; The rotating switching frame is equipped with two switching shafts, and each of the two movable sealing plates is equipped with a lifting frame. The two switching shafts are respectively movably installed inside the two lifting frames.

[0012] Furthermore, in a preferred embodiment of the present invention, a driving pressure rod is movably installed in each of the two preheating material boxes, the two driving pressure rods are respectively installed on the two synchronous sealing plates, and a driving pressure shaft is installed on the driving pressure rod; Two mounting brackets are installed on the switching feed pipe, and each mounting bracket is equipped with a switch. The two switches are electrically connected to the two pre-melting cylinders and the two stirring motors, respectively.

[0013] Furthermore, in a preferred embodiment of the present invention, an auxiliary discharge device is also included. The auxiliary discharge device is installed on the multi-stage pre-melting device and is used to assist the multi-stage pre-melting device in discharging materials. The auxiliary discharge device includes two rotating scrapers, which are rotatably mounted on the bottom end of the stirring shaft. The rotating scrapers scrape off the bottom side of the terminal molten plate and discharge the material.

[0014] Furthermore, in a preferred embodiment of the present invention, two lifting grooves are provided on the bottom side of the pre-melting cylinder, and lifting rods are slidably installed in both lifting grooves. Striking plates are installed on both sides of the terminal melting plate, and the two lifting rods are respectively installed on the two striking plates. A push spring is installed on the inner wall of the lifting slide, and the push spring is mounted on the lifting slide rod.

[0015] Furthermore, in a preferred embodiment of the present invention, an extrusion arc seat is installed on the bottom side of the terminal melting plate, and the rotating scraper extrudes the extrusion arc seat to move, thereby driving the terminal melting plate to move upward.

[0016] The advantages of the extrusion equipment for producing modified polyphenylene sulfide fibers proposed in this invention are: In this invention, by setting up a multi-stage pre-melting device, the raw material is processed by the extruder through multiple graded preheating plates in sequence, achieving step-by-step preheating of the raw material. When it finally falls onto the terminal melting plate, the raw material is melted, thus achieving pre-melting. In addition, when the pre-melting cylinder is blocked, two synchronous sealing plates are used to close the feed box to avoid the problem of overheating and deterioration of the raw material caused by continuous feeding. Therefore, by pre-melting, the raw material is initially melted into a melt, which can achieve stable melt feeding and eliminate the fluctuation of solid particle feeding. The preheating plate filtration in the pre-melting stage can intercept impurities in the low-temperature pre-melting state with high melt viscosity, reducing the load on the subsequent melt filter. Furthermore, stable melt feeding can reduce the fiber linear density variation coefficient. Pre-melting filtration intercepts impurities, reduces fiber breaks, defects and other defects, improves the yield, and thus improves the quality stability of fiber products. At the same time, the pre-melting stage filters impurities in advance, reducing wear and blockage of the screw and die head filter, reducing equipment maintenance costs, and extending the service life of subsequent equipment.

[0017] Furthermore, in this invention, by setting up a discharge switching device, when a pre-melting cylinder is blocked, the synchronous sealing plate drives the driving pressure rod to move, the driving pressure rod drives the driving pressure shaft to move, the driving pressure shaft drives the rotating switching frame to rotate, and the rotation of the rotating switching frame drives a lifting frame to move through a switching shaft, causing the lifting frame to drive the movable sealing plate to move down, thus sealing the discharge cylinder on that side. At the same time, the rotation of the rotating switching frame drives another lifting frame to move through another switching shaft, thereby opening another movable sealing plate, closing one switch, and opening another switch, starting another stirring motor, and opening the terminal melting plate and multiple grading preheating plates in another pre-melting cylinder, so as to achieve the purpose of continuing to feed. Therefore, by switching between dual feed hoppers, there is no need to stop the machine to clean impurities, reducing non-production time, and it is possible to achieve non-stop impurity cleaning and feeding switching, ensuring continuous production.

[0018] Furthermore, in this invention, by setting up an auxiliary discharge device, when the stirring shaft rotates, it first drives multiple discharge rotors to rotate, scraping the raw materials on multiple graded preheating plates and terminal melting plates. This helps the raw materials to be heated evenly and also helps with discharge. At the same time, the rotation of the stirring shaft drives the rotating scraper to rotate, causing the rotating scraper to scrape the bottom side of the terminal melting plate, further aiding in discharge. In addition, when the rotating scraper rotates, it contacts the extrusion arc seat, causing the extrusion arc seat to be extruded and moved upward. The upward movement of the extrusion arc seat causes the terminal melting plate to move upward. The terminal melting plate drives two lifting slide rods to move through two striking plates, causing the lifting slide rods to move within the lifting slide grooves and causing the push spring to be stressed. The striking plates contact the pre-melting cylinder and strike the terminal melting plate, further aiding in discharge and preventing the molten raw materials from sticking to the terminal melting plate. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of an extrusion device for producing modified polyphenylene sulfide fiber provided in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the connection between the preheating hopper and the multi-stage pre-melting device of an extrusion equipment for producing modified polyphenylene sulfide fiber, as provided in an embodiment of the present invention. Figure 3 This is a partial cross-sectional view of the connection between the feed box and the preheating box of an extrusion equipment for producing modified polyphenylene sulfide fiber, provided in an embodiment of the present invention. Figure 4 This is a partial structural diagram illustrating the connection between the stirring shaft and the pre-melting cylinder of an extrusion device for producing modified polyphenylene sulfide fibers, provided in an embodiment of the present invention. Figure 5 This is a partial structural diagram illustrating the connection between the pre-melting cylinder and the synchronous sealing plate, etc., of an extrusion device for producing modified polyphenylene sulfide fibers, provided in an embodiment of the present invention. Figure 6 This is a partial cross-sectional view of the connection between the pre-melting cylinder and the sinker in an extrusion device for producing modified polyphenylene sulfide fibers, provided in an embodiment of the present invention. Figure 7 This is a partial structural diagram illustrating the connection between the V-shaped pusher and the closed pusher frame of an extrusion device for producing modified polyphenylene sulfide fibers, provided in an embodiment of the present invention. Figure 8 This is a partial cross-sectional view of the connection between the synchronous sealing plate and the limiting rod, etc., of an extrusion device for producing modified polyphenylene sulfide fiber, provided in an embodiment of the present invention. Figure 9 This is a cross-sectional view of the connection between the rotating switching frame and the drive pressure rod of an extrusion device for producing modified polyphenylene sulfide fiber, as provided in an embodiment of the present invention. Figure 10 This is a partial cross-sectional view of the connection between the positioning sealing plate and the movable sealing plate of an extrusion equipment for producing modified polyphenylene sulfide fiber, provided in an embodiment of the present invention. Figure 11 This is a partial structural diagram illustrating the connection between the rotating scraper and the extrusion arc seat, etc., of an extrusion device for producing modified polyphenylene sulfide fibers, as provided in an embodiment of the present invention. Figure 12 This is a partial cross-sectional view of the connection between the lifting slide bar and the striking plate, etc., of an extrusion equipment for producing modified polyphenylene sulfide fiber, provided in an embodiment of the present invention.

[0020] In the diagram: 1-Extruder; 2-Feed box; 3-Feed pipe; 4-Agitator motor; 5-Agitator shaft; 6-Preheating hopper; 7-Multi-stage pre-melting device; 701-Pre-melting cylinder; 702-Discharge cylinder; 703-Terminal melting plate; 704-Grading preheating plate; 705-Sinking seat; 706-Sinking slider; 707-Support spring; 708-Synchronous sealing plate; 709-Limiting rod; 710-Return spring; 711-V-type push rod; 712-Mounting shaft; 713-Pressing shaft; 714-Enclosed push frame; 715-Linkage shaft; 71 6-Discharge rotating rod; 8-Discharge switching device; 801-Switching feed pipe; 802-Positioning sealing plate; 803-Modible sealing plate; 804-Lifting frame; 805-Intermediate support rod; 806-Rotating switching frame; 807-Switching shaft; 808-Drive pressure rod; 809-Drive pressure shaft; 810-Mounting frame; 811-Switch; 9-Auxiliary discharge device; 901-Rotating scraper; 902-Extrusion arc seat; 903-Lifting slide bar; 904-Lifting slide groove; 905-Push-down spring; 906-Striking plate; 10-Mixing frame. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] Furthermore, in the description of this invention, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal," "vertical," and "perpendicular" do not imply that components must be absolutely vertical, but rather that they can be slightly tilted. For example, "vertical" simply means that its direction is more vertical relative to "horizontal," not that the structure must be completely vertical, but can be slightly tilted.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Please refer to the attached instruction manual. Figures 1-12 The present invention provides an extrusion device for producing modified polyphenylene sulfide fiber, which includes an extruder 1 and two feed boxes 2. The two feed boxes 2 are connected to feed pipes 3, which are connected to the extruder 1. A stirring motor 4 is installed on the feed box 2, and a stirring shaft 5 is installed on the output shaft of the stirring motor 4. Multiple stirring frames 10 located inside the feed box 2 are installed on the stirring shaft 5.

[0028] Further, please refer to the appendix to the instruction manual. Figures 4-8This invention provides an extrusion device for producing modified polyphenylene sulfide fiber. A preheating hopper 6 is installed on the feed hopper 2, and a multi-stage pre-melting device 7 is installed inside the preheating hopper 6. The multi-stage pre-melting device 7 is used to preheat and pre-melt the raw materials. Specifically, the multi-stage pre-melting device 7 includes a pre-melting cylinder 701, which is movably installed inside the preheating hopper 6. A terminal melting plate 703 is movably installed on the bottom side of the pre-melting cylinder 701, and multiple graded preheating plates 704 are installed inside the pre-melting cylinder 701. A discharge cylinder 702 is installed on the bottom side of the preheating hopper 6, and the pre-melting cylinder 701 is inserted into the discharge cylinder 702. It should be noted that, in this embodiment of the invention, when the extruder 1 processes the raw material, the raw material passes through multiple staged preheating plates 704 in sequence to achieve step-by-step preheating of the raw material, and when it finally falls onto the terminal melting plate 703, the raw material is melted to achieve pre-melting of the raw material. The pre-melted raw material enters the feed pipe 3 through the discharge cylinder 702 and the switching feed pipe 801, and then enters the extruder 1, so that the raw material can easily pass through the extruder 1, and at the same time, impurities in the raw material can be fully filtered.

[0029] It should be emphasized that, in this invention, the temperatures of the terminal melting plate 703 and the multiple staged preheating plates 704 need to be specifically selected based on parameters such as the size and properties of the raw materials. The optimal selection is to meet the actual usage requirements.

[0030] More specifically, in this embodiment of the invention, a discharge switching device 8 is also included. The discharge switching device 8 is installed on the feed pipe 3, and both feed boxes 2 are connected to the discharge switching device 8. The discharge switching device 8 is used to switch between the two feed boxes 2. The discharge switching device 8 includes a switching feed pipe 801, which is installed on the feed pipe 3. Both discharge cylinders 702 are connected to the switching feed pipe 801. Two positioning sealing plates 802 are installed inside the switching feed pipe 801, and two movable sealing plates 803 are movably installed inside the switching feed pipe 801. The movable sealing plates 803 move down to cooperate with the positioning sealing plates 802 to close one side of the switching feed pipe 801. It should be noted that, in this embodiment of the invention, when a pre-melting cylinder 701 is blocked, a lifting frame 804 causes the movable sealing plate 803 to move downward, thereby sealing the discharge cylinder 702 on that side. At the same time, the rotating switching frame 806 rotates and drives another lifting frame 804 to move through another switching shaft 807, thereby opening another movable sealing plate 803 and closing one switch 811. Simultaneously, another switch 811 opens, causing another stirring motor 4 to start, and the terminal melting plate 703 and multiple staged preheating plates 704 in another pre-melting cylinder 701 to open, so as to achieve the purpose of continuing to feed.

[0031] Please continue to refer to the instruction manual appendix. Figures 4-8Furthermore, the extrusion equipment for producing modified polyphenylene sulfide fiber provided in this embodiment of the invention includes a multi-stage pre-melting device 7, which further includes two synchronous sealing plates 708. Two limiting rods 709 are movably installed on each of the two synchronous sealing plates 708. The limiting rods 709 are installed on the inner wall of the preheating material box 6. The two synchronous sealing plates 708 are close to each other to close the feed box 2. Furthermore, a push spring 710 is installed at one end of the limiting rod 709, and the push spring 710 is installed on the inner wall of the synchronous sealing plate 708. It should be noted that, in this embodiment of the invention, when a blockage occurs in the pre-melting cylinder 701, the two synchronous sealing plates 708 move, and the synchronous sealing plates 708 move horizontally on the two limiting rods 709, causing the two push springs 710 to be stretched and the feed box 2 to be closed, thus avoiding the problem of continuous feeding during blockage.

[0032] More specifically, in this embodiment of the invention, sinking seats 705 are installed on both inner walls of the preheating hopper 6, and sinking sliders 706 are installed on both sides of the premelting cylinder 701. The two sinking sliders 706 are slidably installed in the two sinking seats 705 respectively. Supporting springs 707 are installed on the inner wall of the sinking seats 705 and are mounted on the sinking sliders 706. It should be noted that, in this embodiment of the invention, when the premelting cylinder 701 sinks, the two sinking sliders 706 move downward within the two sinking seats 705, causing the two supporting springs 707 to be stressed, thereby achieving the vertical movement of the premelting cylinder 701.

[0033] More specifically, in this embodiment of the invention, each of the two recessed seats 705 is rotatably mounted with a mounting shaft 712 on one side, and each of the two mounting shafts 712 is mounted with a V-shaped push rod 711; each of the two synchronous sealing plates 708 is mounted with a closed push frame 714, and each of the two V-shaped push rods 711 is mounted with a linkage shaft 715, and the two linkage shafts 715 are respectively movably mounted in the two closed push frames 714; Furthermore, a downward pressing shaft 713 is installed on one side of each of the two sinking sliders 706. The sinking sliders 706 drive the downward pressing shafts 713 to move downward, which is used to compress the V-shaped push rod 711 to rotate. It should be noted that, in this embodiment of the invention, when the pre-melting cylinder 701 sinks, the sinking sliders 706 drive the downward pressing shafts 713 to move downward, so that the downward pressing shafts 713 compress the V-shaped push rod 711 to rotate. The V-shaped push rod 711 rotates on the sinking seat 705 through the mounting shaft 712. The rotation of the V-shaped push rod 711 drives the closing push frame 714 to move through the linkage shaft 715, so that the closing push frame 714 drives the synchronous sealing plate 708 to move, so as to achieve the purpose of the two synchronous sealing plates 708 moving synchronously and closing the feed box 2.

[0034] More specifically, in this embodiment of the invention, the bottom end of the stirring shaft 5 extends into the pre-melting cylinder 701, and multiple discharge rotating rods 716 for pushing raw materials are installed on the stirring shaft 5. All of the discharge rotating rods 716 are located inside the pre-melting cylinder 701. It should be noted that in this embodiment of the invention, when the stirring shaft 5 rotates, it drives the multiple discharge rotating rods 716 to rotate, scraping the raw materials on the multiple staged preheating plates 704 and the terminal melting plate 703. This helps to ensure uniform heating of the raw materials and also facilitates material discharge.

[0035] Please refer to the instruction manual attached. Figure 4 and Figures 9-10 Furthermore, in this embodiment of the invention, the discharge switching device 8 also includes a rotating switching frame 806, an intermediate support rod 805 is installed on the switching feed pipe 801, and the rotating switching frame 806 is rotatably installed on the intermediate support rod 805. Furthermore, two switching shafts 807 are installed on the rotating switching frame 806, and lifting frames 804 are installed on both movable sealing plates 803. The two switching shafts 807 are respectively movably installed within the two lifting frames 804. It should be noted that, in this embodiment of the invention, when one pre-melting cylinder 701 is blocked, the rotating switching frame 806 rotates and drives one lifting frame 804 to move through one switching shaft 807, causing the lifting frame 804 to drive the movable sealing plate 803 to move downward, thus sealing the discharge cylinder 702 on that side. At the same time, the rotating switching frame 806 rotates and drives another lifting frame 804 to move through the other switching shaft 807, thereby opening the other movable sealing plate 803, achieving the purpose of switching the pre-melting cylinder 701.

[0036] More specifically, in this embodiment of the invention, a drive pressure rod 808 is movably installed in each of the two preheating material boxes 6. The two drive pressure rods 808 are respectively installed on the two synchronous sealing plates 708, and a drive pressure shaft 809 is installed on the drive pressure rod 808. In addition, two mounting brackets 810 are installed on the switching feed pipe 801, and a switch 811 is installed on each of the two mounting brackets 810. The two switches 811 are electrically connected to the two pre-melting cylinders 701 and the two stirring motors 4, respectively. It should be noted that, in this embodiment of the invention, when a pre-melting cylinder 701 is blocked, the synchronous sealing plate 708 causes the driving pressure rod 808 to move, the driving pressure rod 808 causes the driving pressure shaft 809 to move, the driving pressure shaft 809 causes the rotating switching frame 806 to rotate, the rotating switching frame 806 causes the two lifting frames 804 to move, thereby causing one switch 811 to close and the other switch 811 to open, causing another stirring motor 4 to start, and the terminal melting plate 703 and multiple staged preheating plates 704 in another pre-melting cylinder 701 to open, so as to achieve the purpose of continuing to feed.

[0037] Please refer to the instruction manual attached. Figures 11-12Furthermore, the extrusion equipment for producing modified polyphenylene sulfide fiber provided in this embodiment of the invention also includes an auxiliary discharge device 9, which is installed on the multi-stage pre-melting device 7 and is used to assist the multi-stage pre-melting device 7 in discharging material. Specifically, the auxiliary discharge device 9 includes two rotating scrapers 901, which are rotatably mounted on the bottom end of the stirring shaft 5. The rotating scrapers 901 scrape off material from the bottom side of the terminal molten plate 703. It should be noted that, in this embodiment of the invention, when the stirring shaft 5 rotates, it drives the rotating scrapers 901 to rotate, causing the rotating scrapers 901 to scrape the bottom side of the terminal molten plate 703, further assisting in the discharge. Furthermore, when the rotating scrapers 901 rotate, they contact the extrusion arc seat 902, causing the extrusion arc seat 902 to be extruded upwards, striking the terminal molten plate 703, further assisting in the discharge and preventing the molten raw material from adhering to the terminal molten plate 703.

[0038] More specifically, in this embodiment of the invention, two lifting grooves 904 are provided on the bottom side of the pre-melting cylinder 701, and lifting rods 903 are slidably installed in both lifting grooves 904. Striking plates 906 are installed on both sides of the terminal melting plate 703, and the two lifting rods 903 are respectively installed on the two striking plates 906. Furthermore, a push spring 905 is installed on the inner wall of the lifting chute 904, and the push spring 905 is mounted on the lifting slide rod 903. It should be noted that, in this embodiment of the invention, the rotation of the stirring shaft 5 drives the rotating scraper 901 to rotate and contact the extrusion arc seat 902, causing the extrusion arc seat 902 to be extruded upward. The upward movement of the extrusion arc seat 902 causes the terminal melting plate 703 to move upward. The terminal melting plate 703 drives the two lifting slide rods 903 to move through the two striking plates 906, causing the lifting slide rods 903 to move within the lifting chute 904, and causing the push spring 905 to be stressed. The striking plates 906 contact the pre-melting cylinder 701 and strike the terminal melting plate 703, further assisting in material discharge.

[0039] More specifically, in this embodiment of the invention, an extrusion arc seat 902 is installed on the bottom side of the terminal melting plate 703. The rotating scraper 901 extrudes the extrusion arc seat 902, causing it to move and thus driving the terminal melting plate 703 upwards. It should be noted that in this embodiment of the invention, the rotation of the stirring shaft 5 drives the rotating scraper 901 to rotate and contact the extrusion arc seat 902, causing the extrusion arc seat 902 to be extruded upwards, thereby achieving the purpose of the extrusion arc seat 902 moving upwards and driving the terminal melting plate 703 upwards.

[0040] In summary, the working principle of the extrusion equipment for producing modified polyphenylene sulfide fibers provided in this embodiment of the invention is as follows: When the raw material is processed in the extruder 1, it enters the preheating tank 6 through the feed box 2. At the same time, the stirring motor 4 drives the stirring shaft 5 to rotate multiple stirring frames 10, which helps the feed box 2 discharge the material. It should be noted that when the raw material enters the preheating tank 6, it passes through multiple staged preheating plates 704 in sequence, achieving step-by-step preheating of the raw material. When it finally falls on the terminal melting plate 703, the raw material is melted, achieving pre-melting of the raw material. The pre-melted raw material enters the feed pipe 3 through the discharge cylinder 702 and the switching feed pipe 801, and then enters the extruder 1. This allows the raw material to pass through the extruder 1 easily and also allows for thorough filtration of impurities in the raw material. Furthermore, if a blockage occurs in the pre-melting cylinder 701, or if the raw material discharge is obstructed, the pre-melting cylinder 701 will cause the two sinking sliders 706 to move downward within the two sinking seats 705, and the two support springs 707 will be stressed. The downward movement of the sinking sliders 706 will cause the pressing shaft 713 to move, which will cause the pressing shaft 713 to squeeze the V-shaped push rod 711 to rotate. The V-shaped push rod 711 will rotate on the sinking seat 705 via the mounting shaft 712. The rotation of the V-shaped push rod 711 will drive the closing push frame 714 to move via the linkage shaft 715, which will cause the closing push frame 714 to drive the synchronous sealing plate 708 to move. The synchronous sealing plate 708 will move horizontally on the two limiting rods 709, and the two push springs 710 will be stressed and stretched. The two synchronous sealing plates 708 are used to close the feed box 2 to avoid the problem of excessive heating and deterioration of the raw material caused by continuous feeding when there is a blockage. Furthermore, when the stirring shaft 5 rotates, it first drives multiple discharge rotors 716 to rotate, scraping the raw materials on multiple staged preheating plates 704 and terminal melting plates 703. This helps the raw materials to be heated evenly and also helps with discharge. At the same time, the rotation of the stirring shaft 5 drives the rotating scraper 901 to rotate, causing the rotating scraper 901 to scrape the bottom side of the terminal melting plate 703, further aiding in discharge. In addition, when the rotating scraper 901 rotates, it contacts the extrusion arc seat 902, making... The extrusion arc seat 902 is extruded and moved upward. The upward movement of the extrusion arc seat 902 drives the terminal melting plate 703 to move upward. The terminal melting plate 703 drives the two lifting slide rods 903 to move through the two striking plates 906, so that the lifting slide rods 903 move in the lifting slide groove 904 and cause the push spring 905 to be stressed. The striking plates 906 contact the pre-melting cylinder 701 and strike the terminal melting plate 703 to further help with material discharge and avoid the problem of molten raw materials sticking to the terminal melting plate 703. Furthermore, when a pre-melting cylinder 701 is blocked, the synchronous sealing plate 708 drives the drive pressure rod 808 to move, the drive pressure rod 808 drives the drive pressure shaft 809 to move, the drive pressure shaft 809 drives the rotating switching frame 806 to rotate, the rotating switching frame 806 drives a lifting frame 804 to move through a switching shaft 807, the lifting frame 804 drives the movable sealing plate 803 to move down, and closes the discharge cylinder 702 on that side. At the same time, the rotating switching frame 806 drives another lifting frame 804 to move through another switching shaft 807, thereby opening another movable sealing plate 803 and closing one switch 811. At the same time, another switch 811 opens, starting another stirring motor 4, and opening the terminal melting plate 703 and multiple staged preheating plates 704 in another pre-melting cylinder 701, thereby achieving the purpose of continuing to feed.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An extrusion apparatus for producing modified polyphenylene sulfide fibers, characterized in that, It includes an extruder and two feed boxes, with feed pipes connected to the two feed boxes and the feed pipes connected to the extruder. A stirring motor is installed on the feed box, and a stirring shaft is installed on the output shaft of the stirring motor. Multiple stirring frames located inside the feed box are installed on the stirring shaft. A preheating hopper is installed on the feed hopper, and a multi-stage pre-melting device is installed inside the preheating hopper. The multi-stage pre-melting device is used to preheat and pre-melt the raw materials. The multi-stage pre-melting device includes a pre-melting cylinder, which is movably installed inside the preheating hopper. A terminal melting plate is movably installed on the bottom side of the pre-melting cylinder, and multiple staged preheating plates are installed inside the pre-melting cylinder. A discharge cylinder is installed on the bottom side of the preheating hopper, and the pre-melting cylinder is inserted into the discharge cylinder. It also includes a discharge switching device, which is installed on the feed pipe. Both feed boxes are connected to the discharge switching device, which is used to switch between the two feed boxes. The discharge switching device includes a switching feed pipe, which is installed on the feed pipe. Both discharge cylinders are connected to the switching feed pipe. Two positioning sealing plates are installed inside the switching feed pipe, and two movable sealing plates are movably installed inside the switching feed pipe. The movable sealing plates move down to cooperate with the positioning sealing plates to close one side of the switching feed pipe.

2. The extrusion equipment for producing modified polyphenylene sulfide fiber according to claim 1, characterized in that, The multi-stage pre-melting device also includes two synchronous sealing plates, each of which is movably mounted with two limiting rods. The limiting rods are installed on the inner wall of the preheating hopper, and the two synchronous sealing plates are close to each other to close the feed hopper. A push spring is installed at one end of the limiting rod, and the push spring is installed on the inner wall of the synchronous sealing plate.

3. The extrusion equipment for producing modified polyphenylene sulfide fiber according to claim 2, characterized in that, The preheating hopper is equipped with sinking seats on both sides of its inner wall, and the pre-melting cylinder is equipped with sinking sliders on both sides of its inner wall. The two sinking sliders are slidably installed in the two sinking seats respectively. A support spring is installed on the inner wall of the sinking seat, and the support spring is mounted on the sinking slider.

4. The extrusion equipment for producing modified polyphenylene sulfide fiber according to claim 3, characterized in that, Each of the two recessed seats has a mounting shaft rotatably mounted on one side, and a V-shaped push rod is mounted on each of the two mounting shafts; Both of the two synchronous sealing plates are equipped with a closed pusher, and both of the two V-shaped push rods are equipped with a linkage shaft. The two linkage shafts are respectively movably installed inside the two closed pushers. Each of the two sinking sliders is equipped with a pressure shaft on one side. The sinking slider drives the pressure shaft to move downward, which is used to squeeze the V-shaped push rod to rotate.

5. The extrusion equipment for producing modified polyphenylene sulfide fiber according to claim 4, characterized in that, The bottom end of the stirring shaft extends into the pre-melting cylinder, and multiple discharge rotors for pushing raw materials are installed on the stirring shaft, with all of the discharge rotors located inside the pre-melting cylinder.

6. The extrusion equipment for producing modified polyphenylene sulfide fiber according to claim 5, characterized in that, The discharge switching device also includes a rotating switching frame, and an intermediate support rod is installed on the switching feed pipe. The rotating switching frame is rotatably mounted on the intermediate support rod. The rotating switching frame is equipped with two switching shafts, and each of the two movable sealing plates is equipped with a lifting frame. The two switching shafts are respectively movably installed inside the two lifting frames.

7. An extrusion apparatus for producing modified polyphenylene sulfide fiber according to claim 6, characterized in that, Both of the preheating hoppers are equipped with movably mounted driving pressure rods, which are respectively mounted on the two synchronous sealing plates. Each driving pressure rod is equipped with a driving pressure shaft. Two mounting brackets are installed on the switching feed pipe, and each mounting bracket is equipped with a switch. The two switches are electrically connected to the two pre-melting cylinders and the two stirring motors, respectively.

8. The extrusion equipment for producing modified polyphenylene sulfide fiber according to claim 1, characterized in that, It also includes an auxiliary discharge device, which is installed on the multi-stage pre-melting device and is used to assist the multi-stage pre-melting device in discharging material. The auxiliary discharge device includes two rotating scrapers, which are rotatably mounted on the bottom end of the stirring shaft. The rotating scrapers scrape off the bottom side of the terminal molten plate and discharge the material.

9. An extrusion apparatus for producing modified polyphenylene sulfide fiber according to claim 8, characterized in that, Two lifting grooves are provided on the bottom side of the pre-melting cylinder, and lifting rods are slidably installed in both lifting grooves. Striking plates are installed on both sides of the terminal melting plate, and the two lifting rods are respectively installed on the two striking plates. A push spring is installed on the inner wall of the lifting slide, and the push spring is mounted on the lifting slide rod.

10. An extrusion apparatus for producing modified polyphenylene sulfide fibers according to claim 9, characterized in that, An extrusion arc seat is installed on the bottom side of the terminal melting plate. The rotating scraper presses the extrusion arc seat to move, thereby driving the terminal melting plate to move upward.

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