Blanking mechanism and material injection device

Abstract

The application relates to a discharging mechanism and a sauce injecting device. In the installation of a nipple, the open end of the nipple is sleeved on the outer periphery of a first connecting part; then, a second connecting part of a locking piece is pressed outside the open end of the nipple and connected with the first connecting part, so that the open end of the nipple is tightly pressed between the first connecting part and the second connecting part. The design ensures stable installation of the nipple, reduces the risk of nipple falling off, and improves production efficiency; meanwhile, the risk of the nipple falling into the material bag is reduced, and the quality of food is improved. In addition, the fixation of the nipple is completed through the connection between the first connecting part and the second connecting part, so that the fixation mode is relatively standardized compared with the traditional adhesive tape winding mode, the influence on sauce discharging can be reduced, and the sauce injecting and back suction operations are avoided.

Description

Technical Field

[0001] This application relates to the field of food packaging technology, and in particular to feeding mechanisms and injection devices. Background Technology

[0002] Currently, most food sauce packaging uses roller packaging machines, such as instant noodle seasoning packets. The seasoning packets are three-side sealed, and the packaging process involves: longitudinal sealing roller sealing, first transverse sealing roller sealing, sauce injection, and second transverse sealing roller sealing, continuing this sealing process continuously. The sauce injection is completed by the feed pipe. After the sauce is injected, the second transverse seal must be closed. At this point, the sauce must not drip; otherwise, sauce will be trapped during the transverse sealing process, causing leakage after the noodle is cut off from the transverse seal. To prevent sauce dripping during the second transverse sealing, a nipple is installed at the end of the feed pipe. The nipple opens during injection and closes due to suction when the second transverse seal is closed.

[0003] However, due to the structural design limitations of the feeding tube, the nipple is usually fitted onto the end of the feeding tube and then wrapped with food-grade tape. This method of fixing easily leads to the risk of the nipple falling off, affecting production efficiency; at the same time, a detached nipple may fall into the feed bag, affecting the quality of the food. Utility Model Content

[0004] Therefore, it is necessary to provide a feeding mechanism and injection device to reduce the risk of nipple detachment and improve production efficiency; at the same time, it reduces the risk of nipple falling into the feed bag and improves food quality.

[0005] A feeding mechanism includes: a feeding tube with a first connecting portion on its wall, the first connecting portion being used to fit the open end of a nipple; a locking member with a through mounting hole, the locking member being fitted onto the wall of the feeding tube through the mounting hole, and the wall of the mounting hole having a second connecting portion detachably engaged with the first connecting portion, the second connecting portion pressing the open end of the nipple between the first connecting portion and the second connecting portion when engaged with the first connecting portion.

[0006] In the aforementioned feeding mechanism, during nipple installation, the open end of the nipple is fitted over the outer periphery of the first connecting part. Then, the second connecting part of the locking member is pressed against the open end of the nipple and connected to the first connecting part, thus pressing the open end of the nipple tightly between the first and second connecting parts. This design ensures stable nipple installation, reduces the risk of nipple detachment, and improves production efficiency. Simultaneously, it also reduces the risk of the nipple falling into the ingredient bag, improving food quality. Furthermore, the nipple is secured through the connection between the first and second connecting parts; therefore, its securing method is more standardized than the traditional tape wrapping method, reducing the impact on sauce feeding and thus avoiding interference with sauce dispensing and back-suction operations.

[0007] In some embodiments, the first connecting portion is configured as an external thread, and the second connecting portion is configured as an internal thread that mates with the external thread.

[0008] In some embodiments, the external thread includes a plurality of first threaded sections connected sequentially along the discharge direction of the feed pipe, wherein the outer diameter of each first threaded section is larger as it approaches the discharge port of the feed pipe.

[0009] In some embodiments, the internal thread includes a plurality of second threaded sections connected sequentially along the discharge direction of the feed tube, wherein the inner diameter of each second threaded section is larger as it approaches the discharge port of the feed tube.

[0010] In some embodiments, the feeding mechanism includes a limiting member that is circumferentially disposed on the wall of the feeding tube and located on the side of the first connecting portion near the outlet of the feeding tube. The limiting member is used to abut against the locking member.

[0011] In some embodiments, the limiting member includes an abutting surface disposed toward the first connecting portion, the abutting surface being used to abut and engage with the end face of the locking member.

[0012] In some embodiments, the limiting member includes a bottom surface facing away from the first connecting portion, a lateral annular surface facing away from the feed tube, and a transition surface connecting the bottom surface and the lateral annular surface, wherein the transition surface is configured as an outwardly convex arcuate surface.

[0013] In some embodiments, the lateral annular surface is parallel to the discharge direction of the feed pipe.

[0014] In some embodiments, the lateral annular surface is inclined relative to the discharge direction of the feed tube, and the end of the lateral annular surface away from the bottom surface is closer to the feed tube than the end of the lateral annular surface closer to the bottom surface.

[0015] In some embodiments, the feed pipe includes a first pipe section and a second pipe section that are bent and connected, the end of the second pipe section away from the first pipe section includes a discharge port, and the first connecting part is disposed on the pipe wall of the second pipe section.

[0016] A feeding device includes: a nipple, one end of which has an open end; and a feeding mechanism as described in any of the above, wherein the open end is sleeved on the first connecting portion and pressed between the first connecting portion and the second connecting portion.

[0017] The aforementioned filling device, employing the feeding mechanism described above, allows the nipple's open end to be fitted around the first connecting part during nipple installation. Then, the second connecting part of the locking member is pressed against the open end of the nipple and connected to the first connecting part, thus pressing the open end of the nipple tightly between the first and second connecting parts. This design ensures stable nipple installation, reduces the risk of nipple detachment, and improves production efficiency. Simultaneously, it reduces the risk of the nipple falling into the ingredient bag, improving food quality. Furthermore, the nipple is secured through the connection between the first and second connecting parts; therefore, its securing method is more standardized than the traditional tape wrapping method, minimizing impact on sauce feeding and thus avoiding interference with sauce filling and backflow operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the feeding mechanism described in some embodiments of this application.

[0019] Figure 2 This is a schematic diagram of the nipple sleeve on the feeding mechanism as described in some embodiments of this application.

[0020] Figure 3 This is a schematic diagram of the structure of the nipple being pressed onto the feeding mechanism as described in some embodiments of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the feed tube described in some embodiments of this application.

[0022] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle circle.

[0023] Figure 6 This is a schematic diagram of the structure of the fastener described in some embodiments of this application.

[0024] 10. Feed pipe; 11. First pipe section; 12. Second pipe section; 13. Discharge port; 20. First connecting part; 21. First threaded joint; 30. Locking element; 31. Mounting hole; 32. Second connecting part; 321. Second threaded joint; 40. Limiting element; 41. Abutting surface; 42. Lateral annular surface; 43. Bottom surface; 44. Transition surface; 50. Nipple; 51. Open end; X, discharge direction. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] In some embodiments, please refer to Figures 1 to 3 This application provides a feeding mechanism, which includes a feeding tube 10 and a locking member 30. The feeding tube 10 has a first connecting portion 20 on its wall, and the opening end 51 of a nipple 50 is fitted onto the outside of the first connecting portion 20. The locking member 30 has a through mounting hole 31, through which it is fitted onto the wall of the feeding tube 10. The mounting hole 31 has a second connecting portion 32 that is detachably engaged with the first connecting portion 20. When the second connecting portion 32 engages with the first connecting portion 20, it can press the opening end 51 of the nipple 50 between the first connecting portion 20 and the second connecting portion 32.

[0032] In the aforementioned feeding mechanism, during the installation of the nipple 50, the open end 51 of the nipple 50 is fitted around the outer periphery of the first connecting part 20. Then, the second connecting part 32 of the locking member 30 is pressed against the open end 51 of the nipple 50 and connected to the first connecting part 20, thus pressing the open end 51 of the nipple 50 tightly between the first connecting part 20 and the second connecting part 32. This design ensures stable installation of the nipple 50, reduces the risk of the nipple 50 falling off, and improves production efficiency. Simultaneously, it also reduces the risk of the nipple 50 falling into the ingredient bag, improving food quality. Furthermore, the nipple 50 is fixed through the connection between the first connecting part 20 and the second connecting part 32. Therefore, its fixing method is more standardized than the traditional tape wrapping method, reducing the impact on sauce feeding and thus avoiding interference with sauce dispensing and back-suction operations.

[0033] It should be noted that in the traditional method of fixing the nipple 50, tape is usually used for securing it. For example, after the open end 51 of the nipple 50 is fitted onto the feed tube 10, the tape is manually wrapped around the open end 51. However, this wrapping method is easily limited by the manual wrapping experience and strength, resulting in a lack of standardization in the fixing of the nipple 50, and thus an inconsistency in the tightness of the nipple 50 on the feed tube 10. If the nipple 50 is too loose, insufficient sealing may occur during filling or resupply, leading to leakage or the nipple 50 not closing tightly, which may result in filling being trapped during subsequent horizontal sealing.

[0034] Therefore, this embodiment introduces a locking member 30, a first connecting part 20 and a second connecting part 32, so that the fixing method on the nipple 50 is relatively standardized, reducing the impact on the filling or back suction, and thus reducing the probability of filling jamming during subsequent horizontal sealing.

[0035] There are various ways for the first connecting part 20 and the second connecting part 32 to engage, such as, but not limited to, threaded engagement, magnetic engagement, and snap-fit ​​engagement. When the first connecting part 20 and the second connecting part 32 are magnetically engaged, both can be designed as mutually magnetic, annular permanent magnets. To better clamp the opening end 51 of the nipple 50, both permanent magnets can be designed in an L-shape, allowing for magnetic engagement at the bottom and sides, ensuring a tighter seal at the opening end 51 of the nipple 50. Conversely, when the first connecting part 20 and the second connecting part 32 are snap-fit ​​engaged, the first connecting part 20 can be a protruding structure with a corresponding concave structure in the second connecting part 32; or, the first connecting part 20 can be a concave structure with a corresponding protruding structure in the second connecting part 32.

[0036] Additionally, it should be noted that the nipple 50 is a flexible structure designed to prevent the sauce from dripping out of the outlet 13 of the feed tube 10 during horizontal sealing. Typically, the bottom of the nipple 50 has a slit, such as a straight line or a cross shape. When the sauce packet needs to be sealed horizontally, the nipple 50 can be sucked in, causing it to close due to the suction force, preventing the sauce from dripping further.

[0037] Meanwhile, the open end 51 of the nipple 50 can be sleeved on the wall of the feed tube 10 and surround the outer periphery of the first connecting part 20. To further improve the sealing performance, the open end 51 can have a certain degree of elasticity, so that during installation, the open end 51 can be opened up so that the open end 51 elastically fits outside the first connecting part 20.

[0038] Further, please refer to Figures 4 to 6The first connecting part 20 is constructed with an external thread, and the second connecting part 32 is constructed with an internal thread that mates with the external thread. Therefore, the engagement between the first connecting part 20 and the second connecting part 32 is a threaded engagement. Thus, when installing the nipple 50, the open end 51 of the nipple 50 can be fitted over the first connecting part 20; then, by rotating the locking member 30, the first connecting part 20 and the second connecting part 32 are engaged, thereby pressing the open end 51 of the nipple 50 between the first connecting part 20 and the second connecting part 32, improving the stability of the nipple 50.

[0039] In some embodiments, please refer to Figure 5 The external thread includes multiple first threaded sections 21 connected sequentially along the discharge direction X of the feed tube 10. The outer diameter of each first threaded section 21 is larger as it gets closer to the discharge port 13 of the feed tube 10. Thus, the external thread on the feed tube 10 has a structure that is smaller at the top and larger at the bottom. When the open end 51 of the nipple 50 is fitted onto the external thread, the first threaded section 21 near the discharge port 13 is larger, and the force between it and the open end 51 is relatively larger. This can effectively prevent the open end 51 from automatically slipping off the external thread, further improving the stability of the nipple 50 fixed on the feed tube 10.

[0040] It should be noted that the first threaded section 21 refers to the tooth crest structure on the external thread, and the various first threaded sections 21 are interconnected. The outer diameter of each first threaded section 21 is larger the closer it is to the discharge port 13, which increases the resistance between it and the opening end 51 and reduces the risk of it falling off on its own.

[0041] The specific outer diameter values ​​of each first threaded section 21 can be determined based on the actual dimensions of the feed tube 10. Furthermore, to facilitate understanding of the outer diameter of each first threaded section 21, it is possible to... Figure 5 For example, the outer diameter of the first threaded section 21 can be... Figure 5 The dimension indicated by D1.

[0042] When the outer diameter of each first threaded section 21 gradually increases along the discharge direction X, the internal thread on the fastener can be designed as a single threaded section, i.e., a single tooth crest, the size of which can match the size of the largest first threaded section 21; or it can be designed as multiple threaded sections, the size of which is the opposite of the size of the first threaded section 21.

[0043] In other embodiments, the dimensions of each first threaded section 21 may also be designed to be equal.

[0044] In some embodiments, please refer to Figure 6The internal thread includes multiple second threaded sections 321 connected sequentially along the discharge direction X of the feed tube 10. The inner diameter of each second threaded section 321 is larger the closer it is to the discharge port 13 of the feed tube 10. It can be seen that designing the inner diameter of each second threaded section 321 to be larger the closer it is to the discharge port 13 allows each second threaded section 321 to better fit onto the first threaded section 21. At the same time, designing the internal thread as multiple second threaded sections 321 increases the engagement points between the internal and external threads, improves the bonding force between them, and thus improves the stability of the nipple 50.

[0045] It should be noted that the inner diameter of the second threaded section 321 is designed to be larger closer to the discharge port 13, indicating that the height of the second threaded section 321 decreases as it approaches the discharge port 13, meaning the crest height of the second threaded section 321 decreases. To facilitate understanding of the inner diameter of each second threaded section 321, one can... Figure 6 For example, the inner diameter of the second threaded section 321 can be... Figure 6 The dimension indicated by D2.

[0046] In some embodiments, please refer to Figure 3 and Figure 5 The feeding mechanism includes a limiting member 40, which is circumferentially disposed on the wall of the feeding tube 10 and located on the side of the first connecting part 20 near the outlet 13 of the feeding tube 10. The limiting member 40 is used to abut against the locking member 30. Therefore, by providing the limiting member 40 on one side of the first connecting part 20, when the opening end 51 of the nipple 50 is locked, the end face of the locking member 30 can abut against the limiting member 40, preventing excessive movement of the locking member 30 and thus ensuring an unstable connection between the first connecting part 20 and the second connecting part 32. Simultaneously, it also ensures that the locking member 30 maintains a uniform position each time it is fixed, improving consistency during fixing. Furthermore, when the locking member 30 abuts against the limiting member 40, a portion of the opening end 51 of the nipple 50 is also pressed between the locking member 30 and the limiting member 40, further ensuring the stable fixing of the nipple 50 and improving the stability of the fixing.

[0047] It should be noted that the limiting component 40 refers to the annular structure protruding from the feed tube 10. There are various ways for it to be connected to the tube wall of the feed tube 10, such as, but not limited to, threaded connection, snap-fit, welding, etc.

[0048] The limiting member 40 can maintain a certain gap with the external thread, or it can be set close to the external thread. At the same time, the radial height of the limiting member 40 along the feed tube 10 can be consistent with the height of the external thread, or it can be higher than the height of the external thread. When the height of the limiting member 40 is higher than the height of the external thread, the limiting member 40 can further prevent the nipple 50 from slipping towards the discharge port 13, further improving the stability of the structure.

[0049] Further, please refer to Figure 5 The limiting member 40 includes an abutment surface 41 facing the first connecting portion 20, which is used to abut against the end face of the locking member 30. It can be seen that during the fixing process, the end face of the locking member 30 can abut against the abutment surface 41 of the limiting member 40, so that the open end 51 of the nipple 50 can also be pressed between the locking member 30 and the abutment surface 41, improving the stability of the nipple 50 fixing.

[0050] The contact surface 41 can be a plane or a curved surface. When the contact surface 41 is a curved surface, the end face of the locking member 30 can also be designed as a matching curved surface.

[0051] In some embodiments, please refer to Figure 5 The limiting member 40 includes a bottom surface 43 facing away from the first connecting portion 20, a lateral annular surface 42 facing away from the feed tube 10, and a transition surface 44 connecting the bottom surface 43 and the lateral annular surface 42. The transition surface 44 is constructed as an outwardly convex arc-shaped surface. Therefore, when fitting the opening end 51 of the nipple 50, the opening end 51 can be started from the bottom surface 43 of the limiting member 40, followed by the transition surface 44, and fitted onto the lateral annular surface 42; then, it can be moved from the lateral annular surface 42 onto the first connecting portion 20. Because the transition surface 44 is an outwardly convex arc-shaped surface, it is easier to smoothly fit the opening end 51 onto the limiting member 40 during fitting, and the limiting member 40 fits onto the first connecting portion 20. This improves the convenience of fixing the nipple 50.

[0052] Meanwhile, the transition surface 44 is designed as a convex arc surface, which can reduce scratches on the nipple 50 during the insertion process and ensure the structural integrity of the nipple 50.

[0053] It should be noted that the limiting member 40 may also include an abutting surface 41 facing the first connecting part 20, and the connection between the abutting surface 41 and the lateral annular surface 42 may also be rounded, which can further reduce the chance of scratching the nipple 50.

[0054] The lateral annular surface 42 can be parallel to the discharge direction X of the feed pipe 10, or it can be relatively inclined.

[0055] In some embodiments, the lateral annular surface 42 is parallel to the discharge direction X of the feed pipe 10.

[0056] In some embodiments, please refer to Figure 5The lateral annular surface 42 is inclined relative to the discharge direction X of the feed tube 10, and the end of the lateral annular surface 42 away from the bottom surface 43 is closer to the feed tube 10 than the end that is closer to the bottom surface 43. This allows the end of the lateral annular surface 42 away from the bottom surface 43 to be tilted inward, reducing contact with the nipple 50 and lowering the chance of scratches. At the same time, the lateral annular surface 42 has a smaller upper section and a larger lower section, making it more difficult for the nipple 50 to slip off the limiting member 40, thus improving the stability of the fixation.

[0057] In some embodiments, please refer to Figure 1 The feed pipe 10 includes a first pipe section 11 and a second pipe section 12 that are bent and connected. The end of the second pipe section 12 away from the first pipe section 11 includes a discharge port 13, and a first connecting part 20 is provided on the pipe wall of the second pipe section 12. It can be seen that designing the feed pipe 10 as a bent structure is convenient to slow down the flow rate of the slurry in the feed pipe 10 and ensure stable slurry injection.

[0058] In some specific examples, the first pipe segment 11 and the second pipe segment 12 are set vertically.

[0059] In some embodiments, this application provides a feeding device, which includes: a nipple 50, one end of which includes an open end 51; and a feeding mechanism as described above, wherein the open end 51 is sleeved on the first connecting portion 20 and pressed between the first connecting portion 20 and the second connecting portion 32.

[0060] The aforementioned filling device, employing the feeding mechanism described above, allows the open end 51 of the nipple 50 to be fitted around the outer periphery of the first connecting part 20 during nipple 50 installation. Then, the second connecting part 32 of the locking member 30 is pressed against the open end 51 of the nipple 50 and connected to the first connecting part 20, thus pressing the open end 51 of the nipple 50 tightly between the first connecting part 20 and the second connecting part 32. This design ensures stable installation of the nipple 50, reduces the risk of it falling off, and improves production efficiency. Simultaneously, it also reduces the risk of the nipple 50 falling into the ingredient bag, improving food quality. Furthermore, the nipple 50 is secured through the connection between the first connecting part 20 and the second connecting part 32. Therefore, its securing method is more standardized compared to the traditional tape wrapping method, reducing the impact on sauce feeding and thus avoiding interference with sauce filling and backflow operations.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A feeding mechanism, characterized in that, The feeding mechanism includes: The feeding tube (10) has a first connecting part (20) on its wall, and the opening end (51) of the nipple (50) is used to fit the outside of the first connecting part (20). A locking member (30) has a through mounting hole (31) inside. The locking member (30) is sleeved on the wall of the feed tube (10) through the mounting hole (31). The wall of the mounting hole (31) is provided with a second connecting part (32) that can be detachably matched with the first connecting part (20). When the second connecting part (32) matches the first connecting part (20), it can press the open end (51) of the nipple (50) between the first connecting part (20) and the second connecting part (32).

2. The feeding mechanism according to claim 1, characterized in that, The first connecting part (20) is configured as an external thread, and the second connecting part (32) is configured as an internal thread that mates with the external thread.

3. The feeding mechanism according to claim 2, characterized in that, The external thread includes a plurality of first thread sections (21) connected sequentially along the discharge direction (X) of the feed pipe (10), and the outer diameter of each first thread section (21) is larger the closer it is to the discharge port (13) of the feed pipe (10).

4. The feeding mechanism according to claim 3, characterized in that, The internal thread includes a plurality of second thread sections (321) connected sequentially along the discharge direction (X) of the feed tube (10), and the inner diameter of each second thread section (321) is larger as it is closer to the discharge port (13) of the feed tube (10).

5. The feeding mechanism according to any one of claims 1-4, characterized in that, The feeding mechanism includes a limiting member (40), which is arranged around the wall of the feeding pipe (10) and located on the side of the first connecting part (20) near the outlet (13) of the feeding pipe (10). The limiting member (40) is used to abut against the locking member (30).

6. The feeding mechanism according to claim 5, characterized in that, The limiting member (40) includes an abutting surface (41) disposed toward the first connecting portion (20), the abutting surface (41) being used to abut and cooperate with the end face of the locking member (30).

7. The feeding mechanism according to claim 5, characterized in that, The limiting member (40) includes a bottom surface (43) facing away from the first connecting part (20), a lateral annular surface (42) facing away from the feed tube (10), and a transition surface (44) connecting the bottom surface (43) and the lateral annular surface (42). The transition surface (44) is constructed as an outwardly convex arc-shaped surface.

8. The feeding mechanism according to claim 7, characterized in that, The lateral annular surface (42) is parallel to the discharge direction (X) of the feed pipe (10); and / or, The lateral annular surface (42) is inclined relative to the discharge direction (X) of the feed tube (10), and the end of the lateral annular surface (42) away from the bottom surface (43) is closer to the feed tube (10) than the end of the lateral annular surface (42) that is closer to the bottom surface (43).

9. The feeding mechanism according to any one of claims 1-4, characterized in that, The feeding pipe (10) includes a first pipe section (11) and a second pipe section (12) that are bent and connected. The end of the second pipe section (12) away from the first pipe section (11) includes a discharge port (13). The first connecting part (20) is provided on the pipe wall of the second pipe section (12).

10. A material injection device, characterized in that, The injection device includes: The nipple (50) has an open end (51) at one end; According to any one of claims 1-9, the opening end (51) is sleeved on the first connecting part (20) and pressed between the first connecting part (20) and the second connecting part (32).

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