Hot melt extrusion apparatus

Abstract

This invention relates to the field of melt extrusion equipment technology, and discloses a hot melt extrusion device, including an extruder body, a feed pipe fixed on the extruder body, a hopper above the extruder body, a distribution box connected to the lower end of the hopper, and the discharge port of the distribution box connected to the feed pipe. The hopper contains several rotatable scraper blades and a movable conical guide head. The distribution box contains a rotatable distribution roller with several distribution grooves. Material in the hopper can flow quantitatively into the feed pipe of the extruder body, avoiding blockage due to flowability. Extrusion plates in the distribution grooves facilitate the movement of the distribution roller while rotating, crushing agglomerated material into smaller particles, improving flowability, preventing feed pipe blockage, and improving product processing quality.

Description

Technical Field

[0001] This invention relates to the field of melt extrusion equipment technology, specifically a hot melt extrusion equipment. Background Technology

[0002] Hot melt extrusion equipment is an industrial device that shapes materials through heating and mechanical extrusion. Material enters the barrel from the hopper, is conveyed and compacted by the rotating screw, and the barrel heating raises the material temperature, transforming the polymer into a molten fluid. The screw shears and mixes, ensuring uniform dispersion of the drug and carrier. The melt is extruded through a die, cooled, and forms the finished product. In industrial manufacturing, this equipment is mainly used for the continuous production of plastic products: it can efficiently process materials such as polyethylene, polypropylene, and polyamide, and its continuous operation supports large-scale production.

[0003] In existing technologies, material accumulation in the injection molding hopper can easily cause material compression, leading to reduced flowability and subsequent blockage of the extruder inlet. Furthermore, changes in humidity and temperature can cause material agglomeration, further exacerbating the blockage, affecting production continuity, and causing uneven heating, thus impacting product quality. When the extruder inlet is blocked, the injection molding hopper needs to be manually removed to clear the blockage. This disassembly and reassembly process is time-consuming and labor-intensive, reducing production efficiency. Summary of the Invention

[0004] This invention provides a hot-melt extrusion device that allows material in the hopper to flow quantitatively into the feed pipe of the extruder body. This avoids material inside the feed pipe being compressed, affecting flowability and causing blockage. The extrusion plates in the distribution trough facilitate the movement of the distribution roller while rotating, crushing agglomerated material into smaller particles, improving flowability, preventing feed pipe blockage, and enhancing product processing quality. This invention solves the problem mentioned in the background art where, when the extruder feed inlet is blocked, manual removal of the injection molding hopper is required to clean the blocked material. The hopper disassembly and assembly process is time-consuming and labor-intensive, impacting production efficiency.

[0005] The present invention provides the following technical solution: a hot melt extrusion device, including an extruder body, a feed pipe fixed on the extruder body, and a hopper provided above the extruder body. The lower end of the hopper is connected to a distribution box, the outlet of the distribution box is connected to the feed pipe, and the hopper is provided with a plurality of rotatable scraper plates and a movable conical guide head.

[0006] The material distribution box is equipped with a rotatable material distribution roller, which has several material distribution grooves. Each material distribution groove is equipped with a partition and two movable extrusion plates. A hollow column is fixed at the lower end of the material distribution box, and a first rotating shaft is rotatably connected to the hollow column. A scraper is provided on one side of the first rotating shaft.

[0007] As an optional embodiment of the hot melt extrusion equipment of the present invention, wherein: a second rotating shaft is rotatably connected to the upper end of the hopper, a connecting bracket is fixed to the lower end of the second rotating shaft, a plurality of scraper blades are fixedly connected to the connecting bracket, a first servo motor is fixed on the hopper, and the motor shaft of the first servo motor is fixedly connected to the second rotating shaft, a second servo motor is fixed to one side of the distributing box, and the motor shaft of the second servo motor is fixedly connected to one end of the distributing roller.

[0008] As an optional embodiment of the hot melt extrusion equipment of the present invention, wherein: a sliding rod is slidably connected to the partition plate, the sliding rod is fixedly connected to two extrusion plates, and a plurality of flow holes are opened on the extrusion plates; an abutment ring is fixed to one end of the sliding rod, and a first spring is connected between the abutment ring and the distributing roller.

[0009] As an optional embodiment of the hot melt extrusion equipment of the present invention, a first abutting block is slidably connected to the hopper, a pusher block is fixed at one end of the first abutting block, and a second spring is connected between the pusher block and the hopper.

[0010] As an optional embodiment of the hot melt extrusion equipment of the present invention, wherein: a rocker plate is abutting on the contact ring, a rotating block is fixed on the hopper, the rocker plate is rotatably connected to the rotating block, and one end of the rocker plate abuts against the push block, a protective cover is provided on one side of the hopper, and a plurality of ball bearings are rotatably connected to the rocker plate.

[0011] As an optional embodiment of the hot melt extrusion equipment of the present invention, wherein: a second abutment block is slidably connected to the material distribution box, a first strip plate is fixed on the second abutment block, the first strip plate is elastically connected to the material distribution box through a third spring, an L-shaped rod is fixed to the lower end of the conical guide head, the L-shaped rod is slidably connected to the feed inlet of the material distribution box, and one end of the L-shaped rod is fixedly connected to the first strip plate.

[0012] As an optional embodiment of the hot melt extrusion equipment of the present invention, a hollow rod is fixed on one side of the first rotating shaft, a guide rod is slidably connected on the hollow rod, one end of the guide rod is fixedly connected to the scraper, and a fourth spring is connected between the guide rod and the hollow rod.

[0013] As an optional embodiment of the hot melt extrusion equipment of the present invention, wherein: a gear is fixed at the upper end of the first rotating shaft, the gear is meshed with a rack, one end of the rack is fixedly connected to the first strip plate, a strip groove is opened on one side of the feed pipe, a movable strip plate is provided in the strip groove, and an adjustment component for adjusting the moving position of the strip plate is provided on one side of the feed pipe.

[0014] As an optional embodiment of the hot melt extrusion equipment of the present invention, wherein: the adjusting component includes a rectangular rod, a second strip plate is fixed on the dispensing box, the second strip plate is elastically connected to the second strip plate by a fifth spring, an abutment strip is provided on one side of the abutment ring, the lower end of the abutment strip is slidably connected to the rectangular rod, and a sixth spring is connected between the abutment strip and the rectangular rod.

[0015] As an optional embodiment of the hot melt extrusion equipment of the present invention, wherein: the adjustment component includes a mounting plate, the mounting plate is fixed on the extruder body, an electric push rod is fixed on the mounting plate, and the piston rod of the electric push rod is fixedly connected to the strip plate.

[0016] The present invention has the following beneficial effects:

[0017] 1. In this hot melt extrusion equipment, the material distribution box connected to the lower end of the hopper facilitates the material falling into the corresponding distribution groove on the distribution roller, allowing the material in the hopper to flow quantitatively into the feed pipe of the extruder body. This avoids the material inside the feed pipe being compressed, affecting its flowability and causing blockage. The scraper in the hopper can scrape off the material adhering to the inner wall of the hopper, reducing material waste. On the other hand, the rotation of the scraper can promote the flow of material in the hopper, making it easier for the material to enter the distribution box. The extrusion plates set in the distribution groove facilitate the movement of the distribution roller while it is rotating, crushing the clumps of material into smaller particles, improving flowability, avoiding blockage of the feed pipe, and improving the processing quality of the product.

[0018] When the first servo motor drives several scraper blades to rotate inside the hopper, they can contact the first contact block, causing the pusher block to push the rocker plate to deflect. This causes the other end of the rocker plate to push the rotating contact ring to move, which in turn causes the sliding rod to move the extrusion plate in the distribution groove on the distribution roller. This achieves the purpose of automatically extruding the lumpy material in the distribution groove, reducing the volume of the lumpy material, and making it easier for the extruder body to process it.

[0019] 2. In this hot melt extrusion equipment, the horizontal movement of the conical guide head inside the hopper can change the flow path and speed of the material, preventing the material from accumulating or bridging in the hopper, ensuring smooth flow and uniform delivery of the material, and reducing downtime and reduced production efficiency caused by material blockage or uneven flow. The first rotating shaft connected to the hollow column can drive the scraper to rotate inside the feed pipe, so that the scraper can press against the inner wall of the feed pipe to scrape off the material that has melted and adhered to the feed pipe due to high temperature, avoiding obstruction of material flow. After cleaning, it can avoid poor feeding, allowing the material to enter the barrel more evenly, reducing local accumulation or gaps, and ensuring continuous production.

[0020] The second contact block on the distribution box can intermittently contact the rotating distribution roller, which can drive the first strip plate to move automatically horizontally. On the one hand, when the first strip plate moves horizontally, the L-shaped rod can drive the conical guide head to move automatically back and forth in the hopper, changing the flow path and speed of the material and preventing material blockage. On the other hand, the rack installed at the lower end of the first strip plate can drive the gear to deflect, causing the first rotating shaft to drive the scraper to rotate and automatically scrape off the material attached to the inner wall of the feed pipe, improving the flowability of the material.

[0021] 3. In this hot melt extrusion equipment, the strip groove opened through the feed pipe facilitates the sliding connection between the feed pipe and the strip. The strip can contact the rotating scraper to clean the adhering material on the scraper, thereby improving the working efficiency of the scraper. The position of the strip can be easily adjusted by the adjustment component to clean the adhering material on the scraper. Furthermore, after the strip is reset, it is also convenient to automatically scrape off the adhering material on the strip when passing through the strip groove. Attached Figure Description

[0022] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention.

[0023] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention.

[0024] Figure 3 This is a cross-sectional view of the hopper structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the scraper structure of the present invention.

[0026] Figure 5 This is a cross-sectional view of the material distribution box structure of the present invention.

[0027] Figure 6 This is a schematic diagram of the internal structure of the material distribution box of the present invention.

[0028] Figure 7 This is a schematic diagram of the conical guide head and scraper structure of the present invention.

[0029] Figure 8 for Figure 2 Enlarged view of point A in the middle.

[0030] Figure 9 for Figure 3 Enlarged view of section B in the middle.

[0031] In the diagram: 1. Extruder body; 2. Feed pipe; 3. Hopper; 4. Distribution box; 5. Scraper; 6. Conical guide head; 7. Distribution roller; 8. Distribution trough; 9. Extrusion plate; 10. Hollow column; 11. First rotating shaft; 12. Scraper; 13. Second rotating shaft; 14. Connecting bracket; 15. First servo motor; 16. Second servo motor; 17. Partition plate; 18. Sliding rod; 19. Flow hole; 20. Contact ring; 21. First spring; 22. First contact block; 23. Push block; 24. ... 25. Spring; 26. Rocker; 27. Rotating block; 28. Protective cover; 29. ​​Ball bearing; 30. Second contact block; 31. First strip plate; 32. Third spring; 33. L-shaped rod; 34. Hollow rod; 35. Guide rod; 36. Fourth spring; 37. Gear; 38. Rack; 39. Strip groove; 30. Strip plate; 391. Rectangular rod; 392. Second strip plate; 393. Contact strip; 394. Sixth spring; 395. Fifth spring; 396. Mounting plate; 397. Electric push rod. Detailed Implementation

[0032] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1, please refer to Figures 1 to 9 A hot melt extrusion device includes an extruder body 1, a feed pipe 2 fixed on the extruder body 1, and a hopper 3 above the extruder body 1. The lower end of the hopper 3 is connected to a distribution box 4, and the outlet of the distribution box 4 is connected to the feed pipe 2. The hopper 3 is provided with a number of rotatable scraper plates 5 and movable conical guide heads 6.

[0034] The material distribution box 4 is equipped with a rotatable material distribution roller 7. The material distribution roller 7 has several material distribution grooves 8. The material distribution grooves 8 are respectively equipped with partitions 17 and two movable extrusion plates 9. The lower end of the material distribution box 4 is fixed with a hollow column 10. A first rotating shaft 11 is rotatably connected to the hollow column 10. A scraper 12 is provided on one side of the first rotating shaft 11.

[0035] The upper end of the hopper 3 is rotatably connected to a second rotating shaft 13, and the lower end of the second rotating shaft 13 is fixed to a connecting bracket 14. Several scraper plates 5 are fixedly connected to the connecting bracket 14. A first servo motor 15 is fixed on the hopper 3, and the motor shaft of the first servo motor 15 is fixedly connected to the second rotating shaft 13. A second servo motor 16 is fixed on one side of the material distribution box 4, and the motor shaft of the second servo motor 16 is fixedly connected to one end of the material distribution roller 7.

[0036] A sliding rod 18 is slidably connected to the partition 17. The sliding rod 18 is fixedly connected to two extrusion plates 9, and several flow holes 19 are opened on the extrusion plates 9. A contact ring 20 is fixed to one end of the sliding rod 18, and a first spring 21 is connected between the contact ring 20 and the distributing roller 7.

[0037] A first abutment block 22 is slidably connected to the hopper 3. A push block 23 is fixed to one end of the first abutment block 22. A second spring 24 is connected between the push block 23 and the hopper 3.

[0038] A rocker arm 25 is abutted on the contact ring 20, a rotating block 26 is fixed on the hopper 3, the rocker arm 25 is rotatably connected to the rotating block 26, and one end of the rocker arm 25 abuts against the push block 23. A protective cover 27 is provided on one side of the hopper 3, and several ball bearings 28 are rotatably connected on the rocker arm 25.

[0039] refer to Figures 1 to 9 When the extruder body 1 is in use, the material is fed into the hopper 3. The material enters the distribution box 4 through the hopper 3 and then flows into the corresponding distribution groove 8 on the distribution roller 7. After the material accumulates in the hopper 3 and the feeding is completed, the first servo motor 15 on the hopper 3 is started, causing the first servo motor 15 to drive the second rotating shaft 13 to rotate inside the hopper 3. The connecting bracket 14 fixed at the lower end of the second rotating shaft 13 drives several scraper plates 5 to rotate synchronously against the inner wall of the hopper 3. On the one hand, the material adhering to the inner wall of the hopper 3 can be scraped off. This reduces material waste. On the other hand, the rotation of the scraper 5 promotes the flow of material in the hopper 3, making it easier for the material to enter the distribution box 4. Then, the second servo motor 16 on one side of the distribution box 4 is started, causing the second servo motor 16 to drive the distribution roller 7 to rotate in the distribution box 4. This makes the distribution trough 8 containing the material turn downward as the distribution roller 7 rotates, making it easier for the material to fall quantitatively from the lower end of the distribution box 4 into the feed pipe 2 for processing by the extruder body 1. This avoids the material inside the feed pipe 2 being compressed, affecting its flowability and causing blockage.

[0040] Materials are prone to agglomeration in humid or high-temperature environments, preventing them from smoothly passing through the hopper 3 into the feed pipe 2 on the extruder body 1. This affects feeding, melt flow, equipment load, and product quality, necessitating timely treatment of agglomerated materials. When the scraper 5 rotates on the hopper 3, it intermittently contacts the first contact block 22, causing the first contact block 22 to slide back and forth on the hopper 3, thereby driving the pusher block 23 to move back and forth. The second spring 24 continuously stores and releases its elasticity, allowing the pusher block 23 to push the rocker plate 25 to deflect on the rotating block 26. When the distributing roller 7 rotates, it drives the sliding rod 18 and the contact ring 20 to rotate synchronously. When the rocker plate 25 deflects, it contacts the rotating contact ring 20, causing the contact ring 20 to move back and forth horizontally. The moving ball bearings 28 reduce the friction between the rocker plate 25 and the contact ring 20, thereby reducing wear and extending its service life. During the movement of the contact ring 20, the sliding rod 18 can move on the distribution roller 7 and the partition plate 17, which can realize the purpose of automatic reciprocating motion of the two extrusion plates 9 in the corresponding distribution groove 8. The first spring 21 continuously stores and releases its elasticity, which facilitates the movement of the distribution roller 7 in the rotating state. The extrusion plates 9 apply pressure to the material, thereby crushing the agglomerated material into smaller particles. Since the diameter of the flow hole 19 of the extrusion plate 9 is larger than the diameter of the material, it is convenient for the material to be crushed by the extrusion plate 9 and flow through the extrusion plate 9 to one side, avoiding the material from being compressed and causing it to agglomerate again, thereby improving the flowability of the material, avoiding the blockage of the feed pipe 2, and improving the processing quality of the product.

[0041] The protective cover 27 installed on one side of the hopper 3 is used to protect the push block 23, the rocker plate 25 and the contact ring 20 from being affected during operation, and can also prevent workers from accidentally touching them and causing damage.

[0042] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 9 A second abutment block 29 is slidably connected to the material distribution box 4. A first strip plate 30 is fixed on the second abutment block 29. The first strip plate 30 is elastically connected to the material distribution box 4 through a third spring 31. An L-shaped rod 32 is fixed at the lower end of the conical guide head 6. The L-shaped rod 32 is slidably connected to the feed inlet of the material distribution box 4, and one end of the L-shaped rod 32 is fixedly connected to the first strip plate 30.

[0043] A hollow rod 33 is fixed on one side of the first rotating shaft 11. A guide rod 34 is slidably connected to the hollow rod 33. One end of the guide rod 34 is fixedly connected to the scraper 12. A fourth spring 35 is connected between the guide rod 34 and the hollow rod 33.

[0044] A gear 36 is fixed to the upper end of the first rotating shaft 11. The gear 36 is meshed with a rack 37. One end of the rack 37 is fixedly connected to the first strip plate 30.

[0045] refer to Figures 1 to 7 To prevent material from accumulating or bridging in the hopper 3 during discharge, the conical guide head 6 is used to change the flow path and speed of the material. The second contact block 29, which is slidably connected to the distribution box 4, is located on one side of the partition plate 17. When the corresponding extrusion plate 9 moves towards the partition plate 17 in the distribution groove 8, there is a certain gap between the extrusion plate 9 and the partition plate 17. This ensures that the extrusion plate 9 will not collide with the second contact block 29 when it completes the extrusion of the agglomerated material. This allows the distribution roller 7 to intermittently contact the second contact block 29 when it rotates, causing the second contact block 29 to drive the first strip plate 30 to slide back and forth on the distribution box 4. The third spring 31 continuously stores and releases its elasticity so that the upper end of the first strip plate 30 drives the L-shaped rod 32 and the conical guide head 6 fixed on the L-shaped rod 32 to move back and forth, thereby improving the material discharge effect in the hopper 3.

[0046] Secondly, to prevent the material adhering to the feed pipe 2 from affecting the feeding effect of the extruder body 1, the material adhering to the inner wall of the feed pipe 2 needs to be scraped off and reused in a timely manner. The scraper 12, with the cooperation of the hollow rod 33, the guide rod 34 and the fourth spring 35, presses against the inner wall of the feed pipe 2. When the first strip plate 30 reciprocates, it can drive the rack 37 to move synchronously on the hollow column 10, so as to drive the gear 36 and the first rotating shaft 11 to rotate synchronously, automatically scraping off the material adhering to the feed pipe 2 due to high temperature melting, avoiding obstruction of material flow. After cleaning, it can avoid poor feeding, allowing the material to enter the extruder body 1 more evenly, reducing local accumulation or gaps, and ensuring production continuity.

[0047] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1 to 9 A strip groove 38 is provided on one side of the feed pipe 2, and a movable strip 39 is provided in the strip groove 38. An adjustment component for adjusting the moving position of the strip 39 is provided on one side of the feed pipe 2.

[0048] The adjustment assembly includes a rectangular rod 391, a second strip plate 392 fixed on the material distribution box 4, the second strip plate 392 being elastically connected to the second strip plate 392 by a fifth spring 395, an abutment strip 393 on one side of the abutment ring 20, the lower end of the abutment strip 393 being slidably connected to the rectangular rod 391, and a sixth spring 394 connecting the abutment strip 393 and the rectangular rod 391.

[0049] refer to Figures 1 to 6To improve the scraping effect of the scraper 12, the attached materials on the scraper 12 need to be cleaned in time. When the contact ring 20 moves, it can push the contact strip 393 to move horizontally. Since the elastic force of the sixth spring 394 is greater than that of the fifth spring 395, the contact strip 393 drives the rectangular rod 391 to slide on the second strip plate 392. The fifth spring 395 stores force, causing the strip 39 to slide on the strip groove 38, thereby extending into the feed pipe 2. When the scraper 12... When deflected, it can contact the strip 39, causing the guide rod 34 on the strip 39 to slide on the hollow rod 33. The fourth spring 35 stores force to clean the attachments on the scraper 12. When the contact ring 20 continues to move, the strip 39 stays still against the feed pipe 2, while the contact bar 393 slides on the rectangular rod 391. The sixth spring 394 stores force. After the strip 39 returns to its original position, it automatically scrapes off the attachments on the strip 39 when passing through the strip groove 38.

[0050] Example 4 is an improvement upon Example 3. For details, please refer to [link / reference]. Figures 1 to 9 This application also provides an adjustment component technical solution, the adjustment component includes a mounting plate 396, the mounting plate 396 is fixed on the extruder body 1, an electric push rod 397 is fixed on the mounting plate 396, and the piston rod of the electric push rod 397 is fixedly connected to the strip 39.

[0051] refer to Figure 8 The electric push rod 397 is fixed on the mounting plate 396 on the extruder body 1. By adjusting the extension length of the piston rod of the electric push rod 397, the strip 39 is made to slide in the strip groove 38 and extend into the feed pipe 2 to abut against the scraper 12, so as to clean the attached substances on the scraper 12.

[0052] The first servo motor 15, the second servo motor 16, and the electric push rod 397 are all electrically connected to the controller via wires.

[0053] 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.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A hot melt extrusion device, comprising an extruder body (1), characterized in that: The extruder body (1) is fixed with a feed pipe (2), and a hopper (3) is provided above the extruder body (1). The lower end of the hopper (3) is connected to a distribution box (4). The outlet of the distribution box (4) is connected to the feed pipe (2). The hopper (3) is provided with several rotatable scraper plates (5) and movable conical guide heads (6). The material distribution box (4) is equipped with a rotatable material distribution roller (7), and the material distribution roller (7) is provided with several material distribution grooves (8). The material distribution grooves (8) are respectively provided with partitions (17) and two movable extrusion plates (9). The lower end of the material distribution box (4) is fixed with a hollow column (10), and a first rotating shaft (11) is rotatably connected to the hollow column (10). A scraper (12) is provided on one side of the first rotating shaft (11).

2. The hot melt extrusion equipment according to claim 1, characterized in that: The upper end of the hopper (3) is rotatably connected to a second rotating shaft (13), and the lower end of the second rotating shaft (13) is fixed with a connecting bracket (14). Several scraper plates (5) are fixedly connected to the connecting bracket (14). A first servo motor (15) is fixed on the hopper (3), and the motor shaft of the first servo motor (15) is fixedly connected to the second rotating shaft (13). A second servo motor (16) is fixed on one side of the distributing box (4), and the motor shaft of the second servo motor (16) is fixedly connected to one end of the distributing roller (7).

3. The hot-melt extrusion equipment according to claim 1, characterized in that: A sliding rod (18) is slidably connected to the partition (17). The sliding rod (18) is fixedly connected to the two extrusion plates (9). The extrusion plates (9) have several flow holes (19). One end of the sliding rod (18) is fixed with an abutment ring (20). A first spring (21) is connected between the abutment ring (20) and the distributing roller (7).

4. The hot-melt extrusion equipment according to claim 3, characterized in that: A first abutting block (22) is slidably connected to the hopper (3), and a pusher (23) is fixed at one end of the first abutting block (22). A second spring (24) is connected between the pusher (23) and the hopper (3).

5. The hot-melt extrusion equipment according to claim 4, characterized in that: The contact ring (20) is abutted by a rocker plate (25), the hopper (3) is fixed with a rotating block (26), the rocker plate (25) is rotatably connected to the rotating block (26), and one end of the rocker plate (25) abuts against the push block (23). A protective cover (27) is provided on one side of the hopper (3), and several balls (28) are rotatably connected to the rocker plate (25).

6. The hot melt extrusion equipment according to claim 3, characterized in that: A second contact block (29) is slidably connected to the material distribution box (4), and a first strip plate (30) is fixed on the second contact block (29). The first strip plate (30) is elastically connected to the material distribution box (4) through a third spring (31). An L-shaped rod (32) is fixed at the lower end of the conical guide head (6). The L-shaped rod (32) is slidably connected to the feed inlet of the material distribution box (4), and one end of the L-shaped rod (32) is fixedly connected to the first strip plate (30).

7. The hot melt extrusion equipment according to claim 6, characterized in that: A hollow rod (33) is fixed on one side of the first rotating shaft (11), and a guide rod (34) is slidably connected on the hollow rod (33). One end of the guide rod (34) is fixedly connected to the scraper (12), and a fourth spring (35) is connected between the guide rod (34) and the hollow rod (33).

8. The hot melt extrusion equipment according to claim 7, characterized in that: A gear (36) is fixed at the upper end of the first rotating shaft (11), and the gear (36) is meshed with a rack (37). One end of the rack (37) is fixedly connected to the first strip plate (30). A strip groove (38) is provided on one side of the feed pipe (2), and a movable strip piece (39) is provided in the strip groove (38). An adjustment component for adjusting the moving position of the strip piece (39) is provided on one side of the feed pipe (2).

9. The hot melt extrusion equipment according to claim 8, characterized in that: The adjustment assembly includes a rectangular rod (391), and a second strip plate (392) is fixed on the material distribution box (4). The second strip plate (392) is elastically connected to the second strip plate (392) by a fifth spring (395). An abutment strip (393) is provided on one side of the abutment ring (20). The lower end of the abutment strip (393) is slidably connected to the rectangular rod (391), and a sixth spring (394) is connected between the abutment strip (393) and the rectangular rod (391).

10. The hot-melt extrusion equipment according to claim 8, characterized in that: The adjustment assembly includes a mounting plate (396) which is fixed on the extruder body (1). An electric push rod (397) is fixed on the mounting plate (396), and the piston rod of the electric push rod (397) is fixedly connected to the strip (39).

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