A blanking structure and a molding machine

Abstract

The application provides a blanking structure and a forming machine, and relates to the technical field of cigarette production. The blanking structure comprises a blanking pipeline and a switch assembly. The blanking pipeline is installed at the discharge port of a dust collector and is vertically arranged below the discharge port. A dust accumulation barrel is arranged at the end of the blanking pipeline away from the discharge port. The switch assembly comprises at least two switch pieces. The switch piece close to the discharge port is arranged on the blanking pipeline at the end close to the discharge port, and is used for blocking the communication between the blanking pipeline and the discharge port. The switch piece away from the discharge port is arranged on the blanking pipeline at the end close to the dust accumulation barrel, and is used for blocking the communication between the blanking pipeline and the dust accumulation barrel. The blanking structure of the application is provided between the dust collector and the dust accumulation barrel, and two openable and closable switch pieces are arranged on the blanking pipeline, so that the explosion-proof performance of the embodiment can be effectively improved, the industry requirements can be met, and the safety of the embodiment can be improved.

Description

Technical Field

[0001] This application relates to the field of cigarette production technology, and more specifically, to a feeding structure and a forming machine. Background Technology

[0002] In the tobacco industry, "forming machine" usually refers to a filter rod forming machine, also known as a cigarette tow forming machine. It is a key piece of equipment for producing cigarette filters, i.e., filter rods. Its main function is to process the tow used in the cigarette industry and finally roll it into a continuous filter rod with a specific diameter and hardness.

[0003] In related technologies, a single-layer slide gate valve is typically installed at the material discharge port of the dust collector in molding machines as an airlock valve, which remains open during production. After a period of production, the slide gate valve needs to be closed, the dust collection bin underneath pulled out, cleaned, and then reinstalled in its original position before the valve is reopened. However, this single-layer slide gate valve sealing method is prone to dust spillage during dust collection bin cleaning, and it also does not meet industry explosion-proof requirements. Furthermore, due to limitations in the processed materials, a conventional rotary airlock cannot be used to seal the dust collector and dust collection bin. Utility Model Content

[0004] In order to at least address some of the deficiencies mentioned in the related technologies, this application provides a blanking structure and a forming machine.

[0005] To achieve the above objectives, this application provides a material feeding structure for use in the dust collector of a cigarette filter rod forming machine. The material feeding structure includes a material feeding pipe and a switching assembly. The material feeding pipe is installed at the discharge port of the dust collector and is vertically arranged below the discharge port. A dust collection bin is provided at the end of the material feeding pipe away from the discharge port. The switching assembly includes at least two switching elements. The switching element near the discharge port is disposed on the end of the material feeding pipe near the discharge port, used to block the communication between the material feeding pipe and the discharge port; the switching element away from the discharge port is disposed on the end of the material feeding pipe near the dust collection bin, used to block the communication between the material feeding pipe and the dust collection bin.

[0006] Furthermore, the switching component includes a frame and a sealing plate. The frame has a feeding section, and the sealing plate is slidably mounted on the frame and can block the feeding section. The frame is installed horizontally on the discharge pipe, and the feeding section is connected to the discharge pipe and the discharge port.

[0007] Furthermore, the frame includes a mounting section, which is disposed adjacent to the unloading section and located outside the material discharge pipe. The sealing plate is slidable between the mounting section and the unloading section.

[0008] Furthermore, a through hole is provided on the mounting part at a position away from the unloading part, and a control component is slidably installed in the through hole. A connecting clamp is provided at one end of the control component that extends into the interior of the mounting part, and the edge of the sealing plate is installed in the connecting clamp.

[0009] Furthermore, the unloading section is provided with limiting members, and the limiting members are arranged in two layers along the vertical direction. When the sealing plate extends into the unloading section, it is located between the two layers of limiting members.

[0010] Furthermore, the material discharge direction of the discharge pipe is set as the projection direction, the projected area of ​​the sealing plate in the projection direction is S1, and the projected area of ​​the material discharge part in the projection direction is S2, satisfying: S1≥S2.

[0011] Furthermore, the sidewall of the material discharge pipe and the two switching components together form a hopper, and an air jet pipe is provided inside the hopper for spraying compressed air onto the sidewall of the hopper.

[0012] Furthermore, multiple jet pipes are provided inside the hopper near the discharge port, and all of the jet pipes are oriented towards the dust collection bin.

[0013] Furthermore, a connector is provided at one end of the discharge pipe facing the dust collection bin, and the dust collection bin is installed on the connector so that the discharge pipe is connected to the material in the dust collection bin.

[0014] This application also provides a molding machine, including a molding machine body, a dust collector, and a material discharge structure as described in any of the above embodiments. The material discharge structure is installed at the discharge port of the dust collector, and the dust collector is installed on the molding machine body for dust removal from the molding machine body.

[0015] With the above technical solution, when using the material feeding structure of this application, the switch near the discharge port is normally open, and the switch near the dust collection bin is normally closed. When the dust collection bin needs to be removed for cleaning, first adjust the switch near the discharge port to the closed state, so that no more material is discharged from the discharge port into the material feeding pipe. After confirming that it is closed, open the switch near the dust collection bin so that all the remaining material in the material feeding pipe falls into the dust collection bin. After the material feeding is completed, remove the dust collection bin for cleaning. After cleaning, put the dust collection bin back in place, first close the switch near the dust collection bin, and then open the switch near the discharge port.

[0016] The material discharge structure of this application includes a material discharge pipe between the dust collector and the dust collection bin, and two openable and closable switches on the material discharge pipe. This not only ensures that no material falls into the external environment when cleaning the dust collection bin, thus improving the reliability of this embodiment, but also effectively improves the explosion-proof performance of this embodiment to meet industry requirements and enhance the safety of this embodiment.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the blanking structure from one perspective, provided in an embodiment of this application. Figure 2 A schematic diagram of the blanking structure provided in an embodiment of this application from another perspective; Figure 3 This is a schematic diagram of the structure of a switching device provided in an embodiment of this application from one perspective; Figure 4 Provided for the embodiments of this application Figure 3 Sectional view at point AA; Figure 5 Provided for the embodiments of this application Figure 4 A magnified view of a section at point B in the middle.

[0020] icon: 100 - Material discharge pipe; 110 - Transparent window; 200 - Switch assembly; 210 - Switch component; 211 - Material discharge section; 212 - Installation section; 213 - Control component; 214 - Sealing plate; 215 - Limiting component; 216 - Connecting clamp; 300 - Dust collection bin. Detailed Implementation

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

[0022] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] This embodiment provides a material discharge structure to solve the problems in related technologies, such as the dust collection bin 300 easily spilling materials when being replaced, and the explosion-proof performance between the dust collector and the dust collection bin 300 failing to meet industry requirements.

[0025] Please see Figures 1 to 3 For example, this embodiment provides a material feeding structure for use in the dust collector of a cigarette filter rod forming machine. The material feeding structure includes a material feeding pipe 100 and a switching assembly 200. The material feeding pipe 100 is installed at the discharge port of the dust collector and is vertically arranged below the discharge port. A dust collection bin 300 is provided at the end of the material feeding pipe 100 away from the discharge port. The switching assembly 200 includes at least two switching elements 210. The switching element 210 near the discharge port is disposed on the end of the material feeding pipe 100 near the discharge port and is used to block the communication between the material feeding pipe 100 and the discharge port. The switching element 210 away from the discharge port is disposed on the end of the material feeding pipe 100 near the dust collection bin 300 and is used to block the communication between the material feeding pipe 100 and the dust collection bin 300.

[0026] Specifically, when using the material discharge structure of this embodiment, the material discharge structure is positioned between the dust collector's discharge port and the dust collection bin 300, with the switch 210 near the discharge port kept normally open and the switch 210 near the dust collection bin 300 normally closed. When the dust collection bin 300 needs to be removed for cleaning, first close the switch 210 near the discharge port. After confirming that the material in the dust collector will no longer be discharged into the material discharge pipe 100 through the discharge port, open the switch 210 near the dust collection bin 300, allowing all the material temporarily stored in the material discharge pipe 100 to fall into the dust collection bin 300. Then close the switch 210 at that location and remove the dust collection bin 300 for cleaning. After cleaning, place the dust collection bin 300 back in its original position, open the switch 210 near the discharge port, and wait for subsequent work.

[0027] The material discharge structure of this embodiment, through the cooperation of two switching components 210 and the material discharge pipe 100, sets up a double-layer seal between the dust collector's discharge port and the dust collection bin 300. When cleaning the dust collection bin 300, the two switching components 210 cooperate to ensure that no material spills outside the dust collection bin 300 and pollutes the external environment, thus improving the practicality of this embodiment; at the same time, it can effectively improve the explosion-proof performance between the discharge port and the dust collection bin 300, meeting industry requirements and improving the safety of this embodiment.

[0028] In one embodiment, exemplarily, such as Figures 2 to 5 As shown, the switch 210 includes a frame and a sealing plate 214. The frame has a discharge section 211, and the sealing plate 214 is slidably mounted on the frame, capable of sealing the discharge section 211. The frame is horizontally mounted on the discharge pipe 100, and the discharge section 211 communicates with the discharge pipe 100 and the discharge port. The contact surface between the sealing plate 214 and the edge of the discharge section 211 is a linear or planar contact. When the sealing plate 214 is fully pushed into place, a complete and continuous sealing line is formed, effectively blocking airflow and dust. Of course, in actual use, mechanical structures, such as springs, cylinders, or manual locking devices, can be used to ensure that the sealing plate 214 is stably pressed against the sealing surface in the closed state, ensuring a sealing effect and preventing air and dust leakage. For fine, easily airborne materials like tobacco dust, a smooth, seamless sealing surface is more effective at preventing dust leakage than valves with gaps or complex curved surfaces.

[0029] The upper valve closes, and the horizontally sliding upper switch 210 closes, reliably disconnecting the dust collector from the discharge pipe 100. The lower valve opens, and the horizontally sliding lower switch 210 opens, allowing the residual dust in the pipe to fall completely into the dust collection bin 300. The lower valve closes, and the lower switch 210 closes again, completely isolating the dust collection bin 300 from the upper pipe. In this process, both horizontally installed sliding valves provide stable and reliable linear seals, ensuring that the upper system is completely and safely isolated from the external environment when cleaning the dust collection bin 300, thus completely solving the problems of dust spillage and explosion hazards during single-layer valve cleaning.

[0030] In one embodiment, exemplarily, such as Figures 2 to 5 As shown, the frame includes a mounting section 212, which is adjacent to the unloading section 211 and located outside the unloading pipe 100. A sealing plate 214 can slide between the mounting section 212 and the unloading section 211. The mounting section 212, located outside the pipe, provides a direct and safe installation position for connecting drive devices or operating mechanisms. Daily inspections, lubrication, adjustments, or replacements can be performed without disassembling the pipe or entering a dusty environment, greatly improving the convenience and safety of maintenance.

[0031] When the sealing plate 214 slides to the mounting part 212, it is completely removed from the channel of the feeding part 211. The feeding channel is completely open and unobstructed, ensuring that dust can pass smoothly and without residue, avoiding material accumulation or blockage caused by the valve structure. Furthermore, the mounting part 212 provides clear limits for the stroke of the sealing plate 214, ensuring that the sealing plate 214 reaches the predetermined position when opening and closing, improving the reliability of operation. In use, microswitches or sensors can also be installed on the mounting part 212 according to actual conditions to achieve high-precision control of the movement of the sealing plate 214, improving the automation level of this embodiment.

[0032] By placing the drive mechanism in the mounting part 212 outside the pipe, it can be effectively isolated from the internal dust environment, further improving the explosion-proof effect of this embodiment.

[0033] In one embodiment, exemplarily, such as Figures 2 to 5As shown, a through hole is provided on the mounting part 212 at a position away from the unloading part 211. A control component 213 is slidably installed in the through hole. A connecting clamp 216 is provided at one end of the control component 213 that extends into the interior of the mounting part 212. The edge of the sealing plate 214 is installed inside the connecting clamp 216. When maintenance, replacement of the drive mechanism, or adjustment of the stroke is required, the operator only needs to operate the control component 213 outside the pipeline, without having to enter the dusty environment or disassemble the entire valve structure. The sealing plate 214 itself does not need to be directly connected to complex drive components. The drive source only needs to be connected to the external control component 213, which allows for the convenient selection of intrinsically safe or explosion-proof drive devices and their placement in a safer position, effectively reducing the risk of introducing ignition sources in dust explosion hazard areas.

[0034] The connecting clamp 216 reduces the difficulty of installing and removing the sealing plate 214. To replace the sealing plate 214, simply pull the control component 213 out to a certain position, so that the connecting clamp 216 contacts and fixes the sealing plate 214. The old sealing plate 214 can then be removed, replaced with a new sealing plate 214, and then re-fixed. The sealing plate 214 is a consumable part and may need to be replaced due to wear or deformation. The connecting clamp 216 in this embodiment can shorten the replacement time of the sealing plate 214, reducing downtime, maintenance costs, and impact on production.

[0035] In this embodiment, the clamp can be designed to match the edge of the sealing plate 214 and fixedly connected by one or more common connecting parts such as limit pins and bolts, so that the connection force distribution between the connecting clamp 216 and the sealing plate 214 is more uniform, avoiding stress concentration caused by drilling or slotting on the sealing plate 214, and improving the structural strength and life of the sealing plate 214 itself.

[0036] In one embodiment, exemplarily, such as Figures 2 to 5 As shown, a limiting member 215 is provided inside the feeding section 211, and the limiting member 215 has two layers arranged vertically. When the sealing plate 214 extends into the feeding section 211, it is located between the two layers of limiting members 215. During the sliding process, especially after closing to the correct position, the sealing plate 214 may experience slight vertical displacement or movement due to its own weight, material impact, or the thrust of the drive mechanism. The two layers of limiting members 215 restrict the sealing plate 214 from both vertical and horizontal directions, that is, strictly restrict the degree of freedom of the sealing plate 214 in the vertical direction, ensuring that the sealing plate 214 is always in a horizontal position and ensuring the sealing surface fits. Precise vertical positioning is a prerequisite for achieving a reliable seal. If the sealing plate 214 shifts vertically, its sealing surface may not be able to fit completely and evenly with the edge of the feeding section 211, resulting in poor sealing and leakage of air or dust. The two layers of limiting members 215 ensure that the sealing surface is always in the optimal contact position.

[0037] When a large amount of dust falls instantly from the dust collector, it impacts the closed sealing plate 214. The two layers of limiting members 215 provide two support points for the sealing plate 214, preventing it from bending, deforming, or vibrating under impact, thus improving the structural rigidity and stability of the entire switch assembly 200. The impact force and driving thrust can be more evenly transmitted to the frame through the two layers of limiting members 215, avoiding stress concentration on one side of the sealing plate 214 or on the sliding track, thereby extending the component's lifespan.

[0038] During the process of the sealing plate 214 sliding into the unloading section 211, the two layers of limiting members 215 act as guides from the beginning, guiding the sealing plate 214 to move along the correct horizontal path and preventing it from tilting, getting stuck, or "biting" during sliding. The stable guidance reduces abnormal friction between the sealing plate 214 and the side wall or sliding track of the unloading section 211, reduces wear, and ensures smooth operation over a long period of time.

[0039] In one embodiment, exemplarily, such as Figures 2 to 5 As shown, the material discharge direction of the discharge pipe 100 is set as the projection direction. The projected area of ​​the sealing plate 214 in the projection direction is S1, and the projected area of ​​the discharge section 211 in the projection direction is S2, satisfying: S1≥S2. That is, when the sealing plate 214 moves to the closed position, its physical size in the material discharge direction covers an area that is at least as large as, or even larger than, the opening area of ​​the discharge section 211. If the sealing plate 214 is smaller than the opening, even if the sealing plate 214 is fully in place, there will still be a gap around the edge of the discharge section 211 that is not covered. This can easily lead to fine tobacco dust continuously escaping from the gap, polluting the working environment, endangering workers' health, and failing to meet environmental protection requirements. This embodiment ensures that the sealing plate 214 can completely seal the entire opening of the discharge section 211, physically cutting off any possible path for material and airflow, which is the basis for achieving effective "airlocking" and "dust prevention".

[0040] In actual manufacturing and assembly processes, dimensional tolerances, geometric tolerances, and installation deviations are unavoidable. The requirement that the area of ​​the sealing plate 214 be larger than the area of ​​the unloading section 211 provides a "safety margin" or "allowance" for these errors. Even if the installation position of the sealing plate 214 has a slight offset, or the opening of the unloading section 211 is slightly irregular, the larger sealing plate 214 can ensure complete coverage of the opening, avoiding localized leakage due to minor deviations. This improves the sealing reliability of the valve under both mass production and field installation conditions.

[0041] In many high-performance valve designs, an "interference fit" or "lap seal" is employed. This means the sealing plate 214 is designed to be slightly larger than the opening of the discharge section 211. This forms an effective sealing line. When the sealing plate 214 is pushed into place by the drive mechanism, it "presses" against the sealing edge of the discharge section 211. This causes the sealing material to elastically deform, filling any microscopic unevenness and forming a tighter sealing line.

[0042] In one embodiment, exemplarily, such as Figures 2 to 5 As shown, the side wall of the discharge pipe 100 and the two switching components 210 enclose a hopper. An air jet pipe is installed inside the hopper to spray compressed air onto its side wall. Tobacco dust, especially filter rod dust treated with plasticizers, has a certain degree of stickiness and easily adheres to the inner walls of the discharge pipe 100 and the hopper. Long-term accumulation can form clumps, reducing the effective flow cross-section of the discharge pipe 100 and affecting the smooth flow of material. Accumulation near the switching components 210 may obstruct the normal opening and closing of the valves, leading to jamming or poor sealing.

[0043] The compressed air ejected from the jet pipe forms an air curtain or airflow that continuously or intermittently washes the side walls of the silo, breaking the adhesion between dust and the wall surface, preventing it from adhering and accumulating, and ensuring that the inside of the silo remains clean and smooth at all times.

[0044] Before cleaning the dust collection bin 300, close the upper valve first, then open the lower valve to allow all the material temporarily stored in the hopper to fall into the dust collection bin 300. However, even with gravity, a small amount of dust may still adhere to the side walls or corners and not completely fall into the dust collection bin 300. This can easily lead to residue remaining in the hopper after cleaning the dust collection bin 300, which will continue to fall when the upper valve is opened next time, affecting the cleaning effect. In this embodiment, the jet pipe is activated simultaneously with or shortly after opening the lower valve. The impact force of the compressed air can "blow away" the residual dust adhering to the side walls and corners, allowing it to fall smoothly into the dust collection bin 300 below. This ensures that the hopper is completely emptied.

[0045] In one embodiment, exemplarily, such as Figures 2 to 5 As shown, multiple jet pipes are installed inside the hopper near the discharge port, and all jet pipes are oriented towards the dust collection bin 300. The discharge port is the first point of impact for dust entering the hopper from the dust collector. The high-speed falling dust flow has the greatest impact force and is most likely to splash, bounce, and adhere to the side walls, corners, or valves near this point, forming initial accumulation points. Placing the jet pipes near the discharge port improves the cleaning effect. Compressed air can immediately flush out areas prone to material accumulation, effectively preventing dust from accumulating and sticking there, controlling the accumulation problem at its source.

[0046] Using multiple jet nozzles instead of a single one allows for greater coverage of the sidewall area, avoiding cleaning dead zones. All jet nozzles are directed towards the dust collection bin 300, ensuring that the multiple airflows travel in the same direction. These airflows can merge to form a downward-flowing, continuous air curtain or airflow band. This not only flushes the sidewalls but also guides and accelerates dust particles that have already fallen into the hopper, allowing them to move more smoothly and quickly towards the dust collection bin 300, preventing them from accumulating in the middle or lower part of the hopper.

[0047] In one embodiment, exemplarily, such as Figure 1 As shown, a transparent window 110 is provided on the material discharge pipe 100 so that the operator can observe the material accumulation, adhesion or purging situation in the material discharge pipe 100 in real time.

[0048] In one embodiment, exemplarily, such as Figures 2 to 5 As shown, a connector is provided at the end of the discharge pipe 100 facing the dust collection bin 300. The dust collection bin 300 is installed on the connector to allow material communication between the discharge pipe 100 and the dust collection bin 300. The dust collection bin 300 needs to be accurately aligned with the outlet of the discharge pipe 100 to effectively receive material. Manual alignment is not only time-consuming but also prone to errors when space is limited or visibility is poor. Connectors such as flanges, clips, guide grooves, and tapered openings act as mechanical guides and positioning devices. When the dust collection bin 300 approaches, the connector can automatically guide it into the correct position, ensuring precise alignment of the outlet and inlet and preventing material spillage. Precise positioning also ensures a good seal in this embodiment.

[0049] This embodiment also provides a molding machine, including a molding machine body, a dust collector, and a material discharge structure as described in any of the above embodiments. The material discharge structure is installed at the discharge port of the dust collector, which is installed on the molding machine body for dust removal from the molding machine body.

[0050] The molding machine provided in this embodiment includes the blanking structure in any of the above embodiments, and thus includes all the beneficial effects of the blanking structure, which will not be repeated here.

[0051] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A material feeding structure for use in the dust collector of a cigarette filter rod forming machine, characterized in that, The material feeding structure includes: A material discharge pipe (100) is installed at the discharge port of the dust collector and is vertically arranged below the discharge port. A dust collection bin (300) is provided at the end of the material discharge pipe (100) away from the discharge port. A switch assembly (200) includes at least two switch elements (210). The switch element (210) near the discharge port is disposed on the material discharge pipe (100) at one end near the discharge port and is used to block the connection between the material discharge pipe (100) and the discharge port. The switch element (210) away from the discharge port is disposed on the material discharge pipe (100) at one end near the dust collection bin (300) and is used to block the connection between the material discharge pipe (100) and the dust collection bin (300).

2. The blanking structure according to claim 1, characterized in that, The switch (210) includes a frame and a sealing plate (214). The frame has a feeding part (211), and the sealing plate (214) is slidably installed on the frame and can block the feeding part (211). The frame is installed horizontally on the material discharge pipe (100), and the material discharge part (211) is connected to the material discharge pipe (100) and the discharge port.

3. The blanking structure according to claim 2, characterized in that, The frame includes a mounting part (212), which is arranged adjacent to the unloading part (211) and is located outside the unloading pipe (100); The sealing plate (214) can slide between the mounting part (212) and the feeding part (211).

4. The blanking structure according to claim 3, characterized in that, A through hole is provided on the mounting part (212) at a position away from the unloading part (211). A control component (213) is slidably installed in the through hole. A connecting clamp (216) is provided at one end of the control component (213) that extends into the interior of the mounting part (212). The edge of the sealing plate (214) is installed in the connecting clamp (216).

5. The blanking structure according to claim 3, characterized in that, The feeding section (211) is provided with a limiting member (215), and the limiting member (215) is provided with two layers in the vertical direction; When the sealing plate (214) extends into the feeding part (211), it is located between the two layers of the limiting member (215).

6. The blanking structure according to claim 3, characterized in that, The material discharge direction of the discharge pipe (100) is set as the projection direction, the projection area of ​​the sealing plate (214) in the projection direction is S1, and the projection area of ​​the material discharge part (211) in the projection direction is S2, satisfying: S1≥S2.

7. The blanking structure according to claim 1, characterized in that, The side wall of the material discharge pipe (100) and the two switch components (210) together form a hopper. An air jet pipe is provided in the hopper for spraying compressed air onto the side wall of the hopper.

8. The blanking structure according to claim 7, characterized in that, Multiple jet pipes are provided in the silo near the discharge port, and all of the jet pipes are oriented toward the dust collection bin (300).

9. The blanking structure according to claim 1, characterized in that, A connector is provided on one end of the discharge pipe (100) facing the dust collection bin (300), and the dust collection bin (300) is installed on the connector so that the material discharge pipe (100) and the material in the dust collection bin (300) are connected.

10. A molding machine, characterized in that, It includes the molding machine body, the dust collector, and the material feeding structure as described in any one of claims 1 to 9; The material feeding structure is installed at the discharge port of the dust collector, which is installed on the main body of the molding machine for dust removal from the main body of the molding machine.

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