Polymer screw extruder feeding device and polymer screw extrusion system

Abstract

This invention belongs to the field of polymer material processing technology. It discloses a polymer screw extruder feeding device, including a feeding shell, a feeding pipe, and a partition. The feeding shell has a first inlet at the top and a first outlet at the bottom. The feeding pipe is connected to the side of the feeding shell and includes a second inlet and a second outlet, the second outlet extending into the cavity of the feeding shell. The partition is located at the bottom of the cavity of the feeding shell, forming a downward-opening material cavity between the partition and the side wall of the feeding shell. The second outlet of the feeding pipe communicates with the material cavity. A polymer screw extrusion system is also disclosed. This application can greatly improve the practicality of the product, optimize the feed-output ratio of different raw materials, prevent material blockage, and ensure the quality of polymer melt spinning.

Description

Technical Field

[0001] This invention belongs to the field of polymer material processing technology, specifically relating to a polymer screw extruder feeding device and a polymer screw extrusion system. Background Technology

[0002] As an important piece of equipment for polymer melt spinning, the screw can be divided into three parts according to its function: (1) feeding section; (2) compression section to make the polymer into a semi-molten state; (3) metering section to make the polymer into a fluid.

[0003] The existing polymer screw extruder feeding device in chemical fiber screw extruders includes a connecting hose, a hollow steel pipe, and a screw. The hollow steel pipe is vertically positioned above the screw, and the masterbatch enters the screw extruder by gravity. However, as the masterbatch addition rate increases, exceeding 9 kg / h, the hollow steel pipe of the masterbatch feeder becomes clogged, preventing the masterbatch from smoothly entering the screw extruder. In the melt spinning process of polymer chips, the accuracy of masterbatch addition is crucial; once the pipe becomes clogged, the masterbatch and polymer chips cannot be mixed evenly, resulting in poor spinning performance.

[0004] Chinese patent CN207987376U, "A Novel Polyester Filament Production System," discloses a novel polyester filament production system. However, because the upper part of the screw extruder is a feed hopper, adding a large flow of masterbatch still causes masterbatch blockage, and also results in a large workload during disassembly. In addition, there is no sampling valve or transparent screen installed at the screw extruder inlet, making it impossible to visually observe the polymer chip feeding process.

[0005] Chinese patent CN212834155U, entitled "A Simple Polymer Screw Extruder Feeding Device for a Chemical Fiber Screw Extruder," discloses a simple polymer screw extruder feeding device for a chemical fiber screw extruder. Masterbatch enters above the screw through a hollow steel tube, with the bottom of the tube forming a funnel-shaped opening facing the screw. The masterbatch is dispersed through this funnel-shaped opening and mixed with polymer chips. Although this method creates a funnel-shaped opening at the bottom of the hollow steel tube facing the screw, it still causes blockage when the masterbatch flow rate increases.

[0006] The main drawback of existing technologies is that when the amount of masterbatch added to the inlet of the current screw extruder is too large, the masterbatch and polymer chips cannot be mixed evenly, resulting in poor spinning effect. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned problems and deficiencies by providing a polymer screw extruder feeding device and a polymer screw extrusion system. The device features a reasonable structural design, which greatly improves the practicality of the product, optimizes the feeding and discharging ratios of different raw materials, prevents material blockage, and ensures the quality of polymer melt spinning.

[0008] To achieve the above objectives, the technical solution adopted is:

[0009] A feeding device for a polymer screw extruder includes:

[0010] The feed housing has a first feed inlet located at the top and a first discharge outlet located at the bottom;

[0011] A feed pipe, connected to the side of the feed housing, includes a second inlet and a second outlet, the second outlet extending into the cavity of the feed housing; and

[0012] A partition is located at the bottom of the cavity of the feed housing, and a downward-opening material cavity is formed between the partition and the side wall of the feed housing. The second outlet of the feed pipe is connected to the material cavity.

[0013] According to the polymer screw extruder feeding device of the present invention, preferably, the upper part and the side part of the partition are both attached to the side wall of the feeding shell; the lower part of the partition divides the corresponding section of the feeding shell into a first discharge port and a second discharge port, the first discharge port is connected to the first feed port, and the second discharge port is connected to the material cavity.

[0014] According to the feeding device of the polymer screw extruder of the present invention, preferably, the partition includes an arc-shaped partition body, a first guide section disposed on the upper part of the partition body and a second guide section disposed on the lower part of the partition body, wherein the first guide section and the second guide section are both tangential to the partition body.

[0015] According to the polymer screw extruder feeding device of the present invention, preferably, the first discharge port has an expanding port structure, the second discharge port has a converging port structure, and the diameter width of the second discharge port is greater than or equal to the diameter of the second discharge port of the feed pipe.

[0016] According to the polymer screw extruder feeding device of the present invention, preferably, the feeding shell has a rectangular cylindrical structure, and the first discharge port is provided with an expansion section with an expansion port structure and a lower connecting flange.

[0017] According to the polymer screw extruder feeding device of the present invention, preferably, a viewing window is provided on the side wall of the feeding housing, and the viewing window is provided corresponding to the side of the partition.

[0018] According to the polymer screw extruder feeding device of the present invention, preferably, a spare feed pipe and a sampling pipe are provided on the side wall of the feed housing, and a sampling valve is provided on the sampling pipe.

[0019] According to the polymer screw extruder feeding device of the present invention, preferably, a reducing pipe and a bellows are further connected to the upper part of the feeding housing, and an upper connecting flange is provided on the top of the bellows.

[0020] According to the polymer screw extruder feeding device of the present invention, preferably, the bottom of the feeding pipe is provided with an elbow, and the discharge direction of the elbow is parallel to the axial direction of the feeding shell.

[0021] A polymer screw extrusion system includes a screw extruder and a polymer screw extruder feeding device as described above, wherein a first discharge port at the bottom of the feeding housing is correspondingly provided with the feed port of the screw extruder.

[0022] The beneficial effects achieved by adopting the above technical solution are:

[0023] This application features a rational structural design that significantly improves product usability, optimizes the feed-out ratio of different raw materials, prevents material blockage, and ensures the quality of polymer melt spinning. Through the design of the feed housing and partitions, the internal cavity structure is effectively divided. The different sections of the partitions ensure smooth material feeding, preventing localized blockages and ensuring that the material feeding speed meets the operating speed of the screw extruder. This further optimizes the rationality of process connections and the equivalence of efficiency between different pieces of equipment.

[0024] This application utilizes structural designs such as reducing pipes, corrugated pipes, and flanges to facilitate product assembly, installation, and high structural stability. The inclusion of spare feed pipes and sampling pipes ensures continuous system operation and prevents equipment downtime due to localized maintenance or repairs. The application's viewing window allows for real-time monitoring of material feeding in the partition area and facilitates more precise adjustment of the partition's position for optimal feeding performance.

[0025] This application can achieve uniform, stable, and easily controllable mixing with polymer chips when adding large-volume masterbatch, solving the product quality problems caused by uneven mixing of large-volume masterbatch with polymer chips during the polymer fiber formation process, meeting production process requirements, and enhancing enterprise strength. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0027] Figure 1 This is a schematic diagram of the feeding device of a polymer screw extruder according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 A side view structural diagram.

[0029] Figure 3 for Figure 1 A top-view structural diagram.

[0030] Figure 4 This is a cross-sectional view of the discharge shell and partition plate according to an embodiment of the present invention.

[0031] Number in the diagram:

[0032] 100 is the feed housing, 101 is the expansion section, 102 is the lower connecting flange, 103 is the upper connecting flange, 104 is the reducer, and 105 is the bellows.

[0033] 210 is the feed pipe, 211 is the elbow, and 220 is the spare feed pipe;

[0034] 300 is a partition, 301 is the first discharge port, 302 is the second discharge port, 303 is the main body of the partition, 304 is the first guide section, 305 is the second guide section, and 306 is the material chamber;

[0035] 410 is the viewing window, and 420 is the sampling tube. Detailed Implementation

[0036] To make the objectives, technical features, and technical effects of the present invention clearer, the following description will clearly and completely describe the exemplary solutions of the present invention in conjunction with the accompanying drawings of specific embodiments of the present invention.

[0037] See Figures 1-4 This application discloses a feeding device for a polymer screw extruder, including a feeding housing 100, a feeding pipe 200, and a partition 300. The feeding housing 100 has a first feeding port located at the top and a first discharging port located at the bottom. The first discharging port is directly connected to the screw extruder. The feeding housing 100 has a rectangular cylindrical structure. An expansion section 101 with an expansion port structure and a lower connecting flange 102 are provided at the first discharging port.

[0038] In this embodiment, the feed pipe 210 is connected to the side of the feed housing 100. The feed pipe 210 includes a second feed port and a second discharge port, with the second discharge port extending into the cavity of the feed housing 100. A bend 211 is provided at the bottom of the feed pipe 210, and the discharge direction of the bend 211 is parallel to the axial direction of the feed housing.

[0039] The partition 300 is located at the bottom of the cavity of the feed housing 100. The partition 300 and the side wall of the feed housing 100 form a downward-opening material cavity 306. The partition divides the corresponding internal space of the feed housing into two parts, making them independent of each other. Masterbatch is fed from one side of the partition, and polymer chips are fed from the other side of the partition. The position of the partition can be adjusted according to the flow rate of the masterbatch and polymer chips. In this embodiment, the partition can be welded and fixed, or the partition can be set as a structure with a movable bottom. After adjustment, it can be fixed by a slot and / or bolts. The second outlet of the feed pipe 200 is connected to the material cavity 306. The upper part and the side part of the partition 300 are in contact with the corresponding side wall of the feed housing 100. The lower part of the partition 300 divides the corresponding section of the feed housing 100 into a first discharge port 301 and a second discharge port 302. The first discharge port 301 is connected to the first feed port, and the second discharge port 302 is connected to the material cavity.

[0040] The baffle design allows for uniform mixing of the masterbatch with polymer chips into the screw extruder when adding large volumes of masterbatch, making the entire process convenient, time-saving, and labor-saving, and ensuring uniform mixing of the masterbatch and polymer chips.

[0041] This application features a rational structural design that significantly improves product usability, optimizes the feed-out ratio of different raw materials, prevents material blockage, and ensures the quality of polymer melt spinning. Through the design of the feed housing and partitions, the internal cavity structure is effectively divided. The different sections of the partitions ensure smooth material feeding, preventing localized blockages and ensuring that the material feeding speed meets the operating speed of the screw extruder. This further optimizes the rationality of process connections and the equivalence of efficiency between different pieces of equipment.

[0042] Furthermore, in this embodiment, the partition 300 includes an arc-shaped partition body 303, a first guide section 304 disposed on the upper part of the partition body, and a second guide section 305 disposed on the lower part of the partition body. Both the first guide section 304 and the second guide section 305 are tangentially disposed to the partition body 303.

[0043] In order to optimize the material dropping situation at different positions and make the material dropping smoother, the first material dropping port 301 in this embodiment has an expanding port structure and the second material dropping port 302 has a converging port structure. The diameter width of the second material dropping port 302 is greater than or equal to the diameter of the second material discharge port of the feed pipe 210.

[0044] A viewing window 410 is provided on the side wall of the feed housing 100, corresponding to the side of the partition 300. This allows for effective adjustment of the partition's installation position and observation of material falling from both sides of the partition. The specific structure, from the inside out, consists of a rubber sealing gasket, an acrylic viewing window, and a pressure plate, all bolted to the feed housing. A spare feed pipe 220 and a sampling pipe 420 are provided on the side wall of the feed housing 100. The sampling pipe 420 is equipped with a sampling valve, and sampling is performed by opening and closing a 1-inch double-headed internal ball valve. The ports of both the spare feed pipe and the sampling pipe are located inside the feed housing above the partition.

[0045] To facilitate assembly and connection, this application also includes a reducer 104 and a bellows 105 connected to the upper part of the feed housing 100. An upper connecting flange 103 is located at the top of the bellows 105. The upper structure is connected via the bellows and the upper connecting flange, ensuring effective connection between the feeding equipment and the screw extruder. This application, through the design of the reducer, bellows, and flange, allows for easier assembly and installation, and provides high structural stability. The inclusion of a spare feed pipe and sampling pipe better ensures continuous system operation, avoiding downtime caused by maintenance or repair of localized structures. The viewing window allows for real-time monitoring of the material feeding situation in the partition area.

[0046] Using the masterbatch addition device at the polymer screw extruder ensures that when adding a large flow of masterbatch, it can be mixed evenly and stably with the polymer chips, meeting the technical requirements of polymer fiber processing.

[0047] This application also discloses a polymer screw extrusion system, including a screw extruder and a polymer screw extruder feeding device as described above. The first discharge port at the bottom of the feeding housing corresponds to the feed port of the screw extruder. Polymer chips enter from the top of the feeding housing, and masterbatch enters from the feed pipe. Both are relatively independent before entering the screw extruder, allowing for better control of their flow rates and ensuring effective coordination of their feeding speeds without interference.

[0048] It also makes it easier to adjust the position of the partitions more precisely to achieve a good feeding effect.

[0049] This application can achieve uniform, stable, and easily controllable mixing with polymer chips when adding large-volume masterbatch, solving the product quality problems caused by uneven mixing of large-volume masterbatch with polymer chips during the polymer fiber formation process, meeting production process requirements, and enhancing enterprise strength.

[0050] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A feeding device for a polymer screw extruder, characterized in that, include: The feed housing has a first feed inlet located at the top and a first discharge outlet located at the bottom; A feed pipe is connected to the side of the feed housing, the feed pipe includes a second feed port and a second discharge port, the second discharge port extending into the cavity of the feed housing; as well as A partition is located at the bottom of the cavity of the feed housing, forming a downward-opening material cavity between the partition and the side wall of the feed housing. The second outlet of the feed pipe is connected to the material cavity. The lower part of the partition divides a corresponding section of the feed housing into a first discharge port and a second discharge port. The first discharge port is connected to the first feed port, and the second discharge port is connected to the material cavity. The first discharge port has an expanding structure, and the second discharge port has a converging structure. An expansion section with an expansion opening structure is provided at the first discharge port.

2. The feeding device for a polymer screw extruder according to claim 1, characterized in that, The upper and side portions of the partition are both attached to the corresponding sidewalls of the feed housing.

3. The feeding device for a polymer screw extruder according to claim 2, characterized in that, The partition includes an arc-shaped partition body, a first guide section disposed on the upper part of the partition body, and a second guide section disposed on the lower part of the partition body. Both the first guide section and the second guide section are tangent to the partition body.

4. The feeding device for a polymer screw extruder according to claim 2 or 3, characterized in that, The diameter and width of the second discharge port are greater than or equal to the diameter of the second discharge port of the feed pipe.

5. The feeding device for a polymer screw extruder according to any one of claims 1-4, characterized in that, The feed housing has a rectangular cylindrical structure, and a lower connecting flange is also provided at the first discharge port.

6. The feeding device for a polymer screw extruder according to claim 1, characterized in that, A viewing window is provided on the side wall of the feed housing, and the viewing window is provided corresponding to the side of the partition.

7. The feeding device for a polymer screw extruder according to claim 1, characterized in that, A spare feed pipe and a sampling pipe are provided on the side wall of the feed housing, and a sampling valve is provided on the sampling pipe.

8. The feeding device for a polymer screw extruder according to claim 1, characterized in that, The upper part of the feed housing is also connected to a reducing pipe and a bellows, and an upper connecting flange is provided on the top of the bellows.

9. The feeding device for a polymer screw extruder according to claim 1, characterized in that, The bottom of the feed pipe is provided with an elbow, and the discharge direction of the elbow is parallel to the axial direction of the feed housing.

10. A polymer screw extrusion system, characterized in that, It includes a screw extruder and a polymer screw extruder feeding device as described in any one of claims 1-9, wherein the first discharge port at the bottom of the feeding housing is correspondingly provided with the feed port of the screw extruder.

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