A twin screw extruder feed device

Abstract

The utility model discloses a kind of double-screw extruders feeding devices of extruder technical field, including operation platform, the operation platform upper end center is equipped with double-screw extruder, the operation platform upper end one side is equipped with extruder control cabinet, the upper end of double-screw extruder and extruder control cabinet is equipped with feeding structure;The feeding structure includes: mounting table, two connecting frames, feed box, connecting sleeve, cover, inlet, control sleeve, operating shaft, control block, lifting drive assembly and stirring assembly;Lifting drive assembly is driven operating shaft and stirring assembly overall lifting by being set, so that stirring blade is always immersed in material, eliminate mixed dead zone;Spiral blade is in-depth control sleeve with control block, forced crushing lump material, solve the problem of bridging, and conical control block and conical control sleeve constitute variable cross-section flow channel, the clearance area is changed by operating shaft's lifting, realize stepless regulation discharging flow.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically to a feeding device for a twin-screw extruder. Background Technology

[0002] Twin-screw extruders are widely used in polymer processing, and the stability of their feeding devices directly affects production efficiency and product quality. Traditional extruders often experience material bridging or clumping within the feed hopper during operation, leading to interruptions in feeding and requiring manual intervention to clear blockages. This reduces continuous production efficiency. Furthermore, the use of fixed baffles or simple valves to regulate the feed rate makes it difficult to accurately match changes in screw speed, resulting in extrusion fluctuations or uneven feeding. Additionally, the fixed position of the agitator prevents effective material coverage when the material level drops, leading to insufficient mixing and affecting the finished product's processing quality. Moreover, blockages require disassembly and cleaning, and the structural design lacks integrated anti-blocking and flow control functions, increasing downtime. Therefore, a new technical solution is needed to address these issues. Utility Model Content

[0003] The purpose of this utility model is to provide a feeding device for a twin-screw extruder to solve the problems mentioned in the background art. In traditional twin-screw extruder feeding devices, material tends to form bridging or agglomeration in the feed hopper, leading to interruptions in feeding and requiring manual intervention to clear blockages, thus reducing continuous production efficiency. Furthermore, the use of fixed baffles or simple valves to adjust the feed rate makes it difficult to accurately match changes in screw speed, easily causing extrusion fluctuations or uneven feeding. Additionally, the fixed position of the agitator means that when the material level drops, it cannot effectively cover the material layer, resulting in insufficient mixing and affecting the finished product's processing effect. Moreover, blockages require disassembly and cleaning, and the structural design does not integrate anti-blocking and flow control functions, increasing downtime.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a twin-screw extruder feeding device, including an operating table, a twin-screw extruder installed at the center of the upper end of the operating table, an extruder control cabinet installed on one side of the upper end of the operating table, and a feeding structure installed on the upper end of the twin-screw extruder and the extruder control cabinet; The feeding structure includes: a mounting platform, two connecting frames, a feeding box, a connecting sleeve, a cover, a feeding port, a control sleeve, an operating shaft, a control block, a lifting drive assembly, and a stirring assembly; The mounting platform is fixedly installed on the upper end of the extruder control cabinet. The two connecting brackets are respectively installed on both sides of the upper end of the mounting platform. The feed box is fixedly installed on one side of the two connecting brackets. The connecting sleeve is installed at the lower end of the feed box and connected to the feed end of the twin-screw extruder. The cover is installed at the top of the feed box. The inlet is opened on one side of the upper end of the cover. The control sleeve is fixedly installed at the lower end of the feed box. The top end of the operating shaft is movably embedded in the center of the cover through the sleeve. The control block is fixedly installed at the bottom end of the operating shaft and movably embedded in the control sleeve. The lifting drive assembly is fixedly installed at the upper end of the cover and connected to the top end of the operating shaft. The stirring assembly is fixedly installed at the upper end of the operating shaft and the bottom end of the control block.

[0005] As a preferred embodiment of the twin-screw extruder feeding device of this utility model, the lifting drive assembly includes: a motor, a guide block, a lifting frame, a hoisting frame, and an electric push rod; The motor drive end is connected to the top of the operating shaft. The guide block is fixedly installed on one side of the motor. The lifting frame is fixedly installed on one side of the upper end of the cover. The guide block is movably embedded in one side of the lifting frame. The bottom end of the hoisting frame is connected to the outside of the guide block. The electric push rod is fixedly installed on one side of the upper end of the lifting frame, and its telescopic end is connected to the top of the hoisting frame.

[0006] As a preferred embodiment of the twin-screw extruder feeding device of this utility model, the stirring assembly includes: a plurality of stirring blades and a spiral blade; Several stirring blades are evenly distributed on the outside of the operating shaft, and the spiral blades are fixedly installed at the bottom of the control block and move through the control sleeve.

[0007] As a preferred embodiment of the feeding device for a twin-screw extruder according to this utility model, the control block is a conical control block.

[0008] As a preferred embodiment of the feeding device for a twin-screw extruder according to this utility model, the inner hole of the control sleeve is tapered.

[0009] As a preferred embodiment of the feeding device for a twin-screw extruder according to this utility model, an installation sleeve is installed at the connection position between the feeding box and the two connecting frames.

[0010] As a preferred embodiment of the feeding device for a twin-screw extruder according to this utility model, a fixing frame is installed at the connection position between the electric push rod and the lifting frame.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the feeding device of the twin-screw extruder has a reasonable structural design; The lifting drive assembly raises and lowers the operating shaft and mixing assembly as a whole, ensuring that the mixing blades are always submerged in the material, eliminating dead zones in the mixing process. The spiral blades move into the control sleeve along with the control block, forcibly breaking up agglomerated materials and solving bridging problems. The conical control block and the conical control sleeve form a variable cross-section flow channel, and the gap area is changed by raising and lowering the operating shaft, achieving stepless adjustment of the feed flow rate. The conical surface fit enhances the sealing performance and prevents material leakage. The feeding structure is integrated into the mounting platform through a connecting frame. The feeding box and the twin-screw extruder can be quickly assembled and disassembled through the connecting sleeve, while strengthening the installation rigidity of the feeding box and the connecting frame, avoiding displacement deviation caused by vibration, and extending the equipment life. Attached Figure Description

[0012] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention; Figure 2 This is a rear-view three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the rear cross-sectional structure of this utility model; Figure 4 This is a schematic diagram of the structure at point A of this utility model.

[0013] In the diagram: 1. Control panel, 2. Twin-screw extruder, 3. Extruder control cabinet, 4. Mounting platform, 5. Connecting frame, 6. Feed box, 7. Connecting sleeve, 8. Cover, 9. Feed inlet, 10. Control sleeve, 11. Operating shaft, 12. Control block, 13. Motor, 14. Guide block, 15. Lifting frame, 16. Hoisting frame, 17. Electric push rod, 18. Mixing blade, 19. Spiral blade, 20. Mounting sleeve, 21. Fixing frame. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-4 This utility model provides a technical solution: In this technical solution, a twin-screw extruder feeding device includes an operating table 1, a twin-screw extruder 2 installed at the center of the upper end of the operating table 1, an extruder control cabinet 3 installed on one side of the upper end of the operating table 1, and a feeding structure installed on the upper end of the twin-screw extruder 2 and the extruder control cabinet 3. The feeding structure includes: mounting platform 4, two connecting frames 5, feeding box 6, connecting sleeve 7, cover 8, inlet 9, control sleeve 10, operating shaft 11, control block 12, lifting drive assembly and stirring assembly; Mounting platform 4 is fixedly installed on the upper end of extruder control cabinet 3. Two connecting brackets 5 are respectively installed on both sides of the upper end of mounting platform 4. Feed box 6 is fixedly installed on one side of the two connecting brackets 5. Connecting sleeve 7 is installed at the lower end of feed box 6 and connected to the feed end of twin-screw extruder 2. Cover 8 is installed at the top of feed box 6. Feed inlet 9 is opened on one side of the upper end of cover 8. Control sleeve 10 is fixedly installed at the lower end of feed box 6. The top of operating shaft 11 is movably embedded in the center of cover 8 through sleeve. Control block 12 is fixedly installed at the bottom of operating shaft 11 and movably embedded in control sleeve 10. Lifting drive assembly is fixedly installed at the upper end of cover 8 and connected to the top of operating shaft 11. Stirring assembly is fixedly installed at the upper end of operating shaft 11 and the bottom end of control block 12.

[0016] In this technical solution, during the extrusion production of the product, the operator first moves the device to the designated position, then installs the feed box 6 via the connecting frame 5 on the upper end of the mounting platform 4, and connects the device to the designated control equipment. Next, the operator operates the control panel on the upper end of the extruder control cabinet 3 to adjust the parameters of the twin-screw extruder 2. After adjustment, the operator injects the raw material into the feed box 6 through the feed inlet 9, then drives the lifting drive assembly on the upper end of the cover 8 to operate. The lifting drive assembly drives the operating shaft 11 to rise and fall, changing the distance between the control block 12 and the control sleeve 10, achieving stepless adjustment of the feed flow rate. Finally, the material is conveyed into the twin-screw extruder 2 through the connecting sleeve 7 for heating and extrusion. Simultaneously, the operating shaft 11 rotates with the lifting drive assembly, and the stirring assembly outside the operating shaft 11 stirs the material to ensure a good mixing effect.

[0017] In some technical solutions, reference Figure 1 The lifting drive assembly includes: motor 13, guide block 14, lifting frame 15, hoisting frame 16, and electric push rod 17; The drive end of motor 13 is connected to the top of operating shaft 11. Guide block 14 is fixedly installed on one side of motor 13. Lifting frame 15 is fixedly installed on one side of upper cover 8. Guide block 14 is movably embedded in one side of lifting frame 15. The bottom end of hoisting frame 16 is connected to the outside of guide block 14. Electric push rod 17 is fixedly installed on one side of upper end of lifting frame 15, and its telescopic end is connected to the top of hoisting frame 16.

[0018] In this technical solution, when the operating shaft 11 is lifted and rotated, the electric push rod 17 set on the upper end of the lifting frame 15 works. Under the connection of the hoisting frame 16, the height of the guide block 14 and the motor 13 on one side of the lifting frame 15 is changed, thereby adjusting the overall height of the operating shaft 11 and changing the distance between the control block 12 and the control sleeve 10. At the same time, the motor 13 works, driving the operating shaft 11 to rotate at a uniform speed, thus rotating the stirring assembly.

[0019] In some technical solutions, reference Figure 1 The stirring assembly includes: several stirring blades 18 and spiral blades 19; Several stirring blades 18 are evenly distributed on the outside of the operating shaft 11, and the spiral blades 19 are fixedly installed at the bottom of the control block 12 and move through the control sleeve 10.

[0020] In this technical solution, during the rotation of the operating shaft 11, several stirring blades 18 located outside the operating shaft 11 rotate accordingly, fully stirring the material in the feed box 6 to prevent material stratification and bridging. At the same time, the spiral blades 19 located at the bottom of the control block 12 can realize secondary conveying of the material entering the control sleeve 10, effectively avoiding the phenomenon of material accumulation and ensuring the overall feeding effect of the material.

[0021] In some technical solutions, reference Figure 1 The control block 12 is a conical control block 12, and the inner hole of the control sleeve 10 is conical. The conical control block 12 and the conical control sleeve 10 form a variable cross-section flow channel. The gap area is changed by the lifting and lowering of the operating shaft 11 to achieve stepless adjustment of the feeding flow. The conical surface fit enhances the sealing performance and prevents material leakage. The feeding box 6 and the two connecting frames 5 are connected by an installation sleeve 20 to strengthen the installation rigidity of the feeding box 6 and the connecting frame 5, avoid displacement deviation caused by vibration, and extend the service life of the equipment. The electric push rod 17 and the lifting frame 15 are connected by a fixed frame 21. The electric push rod 17 is rigidly connected to the lifting frame 15 through the fixed frame 21 to ensure the stability of the lifting process and avoid mechanical wear caused by vibration.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A feeding device for a twin-screw extruder, comprising an operating table (1), characterized in that, A twin-screw extruder (2) is installed at the center of the upper end of the operating table (1), and an extruder control cabinet (3) is installed on one side of the upper end of the operating table (1). A feeding structure is installed on the upper end of the twin-screw extruder (2) and the extruder control cabinet (3). The feeding structure includes: a mounting platform (4), two connecting frames (5), a feeding box (6), a connecting sleeve (7), a cover (8), a feeding port (9), a control sleeve (10), an operating shaft (11), a control block (12), a lifting drive assembly, and a stirring assembly; The mounting platform (4) is fixedly installed on the upper end of the extruder control cabinet (3). The two connecting brackets (5) are respectively installed on both sides of the upper end of the mounting platform (4). The feed box (6) is fixedly installed on one side of the two connecting brackets (5). The connecting sleeve (7) is installed on the lower end of the feed box (6) and connected to the feed end of the twin-screw extruder (2). The cover (8) is installed on the top of the feed box (6). The inlet (9) is opened on one side of the upper end of the cover (8). The sleeve (10) is fixedly installed at the lower end of the feed box (6). The top end of the operating shaft (11) is movably embedded in the center of the cover (8) through the sleeve. The control block (12) is fixedly installed at the bottom end of the operating shaft (11) and movably embedded in the control sleeve (10). The lifting drive assembly is fixedly installed at the upper end of the cover (8) and connected to the top end of the operating shaft (11). The stirring assembly is fixedly installed at the upper end of the operating shaft (11) and the bottom end of the control block (12).

2. The feeding device for a twin-screw extruder according to claim 1, characterized in that, The lifting drive assembly includes: a motor (13), a guide block (14), a lifting frame (15), a hoisting frame (16), and an electric push rod (17). The drive end of the motor (13) is connected to the top of the operating shaft (11). The guide block (14) is fixedly installed on one side of the motor (13). The lifting frame (15) is fixedly installed on one side of the upper end of the cover (8). The guide block (14) is movably embedded in one side of the lifting frame (15). The bottom end of the hoisting frame (16) is connected to the outside of the guide block (14). The electric push rod (17) is fixedly installed on one side of the upper end of the lifting frame (15), and its telescopic end is connected to the top of the hoisting frame (16).

3. The feeding device for a twin-screw extruder according to claim 1, characterized in that, The stirring assembly includes: a plurality of stirring blades (18) and a spiral blade (19); Several stirring blades (18) are evenly distributed on the outside of the operating shaft (11), and the spiral blades (19) are fixedly installed at the bottom of the control block (12) and move through the control sleeve (10).

4. The feeding device for a twin-screw extruder according to claim 1, characterized in that, The control block (12) is a cone-shaped control block (12).

5. The feeding device for a twin-screw extruder according to claim 1, characterized in that, The inner hole of the control sleeve (10) is tapered.

6. The feeding device for a twin-screw extruder according to claim 1, characterized in that, An installation sleeve (20) is installed at the connection position between the feed box (6) and the two connecting frames (5).

7. A feeding device for a twin-screw extruder according to claim 2, characterized in that, A fixing frame (21) is installed at the connection position between the electric push rod (17) and the lifting frame (15).

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