A fast feeding device and process for express bag production

Abstract

The present invention relates to the technical field of particulate material conveying, and specifically discloses a rapid feeding device and process for express bag production, wherein the feeding device comprises a conveying pipeline, a feeding piece and an air source device, a bend is provided on the conveying pipeline, a screening piece and a conveying mechanism are provided at the bend, the screening piece is provided at the feeding end of the bend, a mounting portion is provided on the outer arc side of the bend, the conveying mechanism is installed in the mounting portion, the conveying mechanism comprises a driving component and a conveyor belt, the driving component drives the conveyor belt to rotate cyclically, the moving direction of the inner arc surface of the conveyor belt is opposite to the conveying direction of the material, a plurality of extrusion pieces are provided on the conveyor belt, the side facing the material conveying direction is the front side, the screening piece is inclined from top to bottom to the front side, and there is a gap between the lower end of the screening piece and the rear side of the conveyor belt, the feeding process comprises feeding preparation, feeding, recording and maintenance, and the technical scheme provided by the present invention facilitates the processing of agglomerated materials during feeding operation, thereby improving the quality of products.

Description

Technical Field

[0001] The present invention relates to the technical field of granular material conveying, and in particular to a rapid feeding device and process for express bag production. Background Art

[0002] During the production process of express bags, the prepared raw materials need to be transported to the production line, and processed through film blowing or casting, printing, cutting, bag making and other processing steps. The raw materials for express bags are usually granular material resins. During the production process, the granular materials need to be transported to the melting equipment through a feeding device for melting. In related technologies, such granular materials are mostly transported through a pneumatic conveying system. During the transportation process, the materials are prone to blockage in the elbow part of the pipe, affecting the material transportation operation.

[0003] The patent document with the authorization announcement number CN116354117B discloses a pneumatic conveying system, including a power unit, a material discharging unit and a material receiving unit, wherein the power unit is used to transport the material in the material discharging unit to the material receiving unit through a pipeline, wherein the pipeline includes a curved pipe, wherein an air cavity is provided on the inner wall of the curved portion of the curved pipe with a larger diameter, wherein an expansion pad for closing the air cavity is provided in the curved pipe, wherein the expansion pad faces the material transmission direction, and an inflatable component for intermittently inflating and deflating the air cavity is provided on the outer wall of the curved pipe, wherein the inflatable component inflates the air cavity to expand the expansion pad;

[0004] The pneumatic conveying system provided by the patent document uses an expansion pad. During the process of conveying materials, the materials will hit the expansion pad, and the expansion pad has a certain buffering effect, which can protect the inner wall of the bent pipe. At the same time, the air cavity is intermittently evacuated and inflated by the inflatable component, which can prevent the material from adhering to the expansion pad and causing blockage of the bent pipe.

[0005] The granular raw materials used in the production of express bags are affected by factors such as the storage environment and transportation, and will produce a certain amount of agglomeration. If the agglomerated material is directly fed into the melting operation through a feeding device, the agglomerated material may be difficult to completely melt because it is more difficult to heat to the melting point than a single particle, forming unmelted lumps or particles, thereby affecting the consistency of the thickness of the blown film and ultimately affecting the quality of the product. The conveying system provided by the above patent document cannot handle the agglomerated material when conveying plastic particles. The agglomerated material will be directly conveyed to the next processing step, affecting the processing quality of the product. Summary of the invention

[0006] The present invention provides a rapid feeding device and process for the production of express bags, aiming to solve the problem in the related art that when the feeding device feeds the granular material, it is unable to process the agglomerated material, resulting in the agglomerated material being directly transported to the next processing step, affecting the product processing quality.

[0007] A rapid feeding device for express bag production of the present invention comprises a conveying pipeline, a feeding piece and an air source device, the discharge end of the feeding piece is connected with the feed end of the conveying pipeline, the air source device is used to convey gas into the conveying pipeline, a bent pipe is provided on the conveying pipeline, a screening piece and a conveying mechanism are provided at the bent pipe, the screening piece is arranged at the feed end of the bent pipe, a mounting portion is provided on the outer arc side of the bent pipe, the conveying mechanism is installed in the mounting portion, the conveying mechanism comprises a driving component and a conveyor belt, the curvature of the conveyor belt is adapted to the curvature of the bent pipe, the driving component drives the conveyor belt to rotate cyclically, the moving direction of the inner arc surface of the conveyor belt is opposite to the conveying direction of the material, a plurality of extrusion pieces are provided on the conveyor belt, the side facing the material conveying direction is the front side, the screening piece is inclined from top to bottom to the front side, and there is a gap between the lower end of the screening piece and the rear side of the conveyor belt for each of the extrusion pieces to pass through.

[0008] The beneficial effect is as follows: during the feeding operation, the agglomerated material is processed. After the material enters the conveying pipe, it flows with the airflow in the conveying pipe. When the material flows to the feeding end of the elbow, the screening element screens the material. Normal granular material passes through the screening element smoothly, while the agglomerated material is blocked by the screening element and cannot pass through. The agglomerated material moves down along the rear end surface of the screening element and enters the rear end of the mounting part. When the conveying assembly rotates, each extrusion element squeezes the agglomerated material at the rear end of the mounting part to crush the agglomerated material. The crushed material moves up between the outer arc surface of the conveyor belt and the inner arc surface of the mounting part as the conveyor belt rotates, and continues to be fed to the next processing step through the elbow together with the granular material, thereby ensuring the quality of the material entering the subsequent processing steps and improving the final production quality of the product.

[0009] Preferably, the extrusion member is provided with a collecting hole, the conveyor belt and the side walls of the mounting portion are arranged to form a collecting cavity, each of the collecting holes is connected to the collecting cavity, and a collecting member is also provided on the outside of the mounting portion, the collecting member is connected to the collecting cavity and is used to extract dust in the collecting cavity.

[0010] The beneficial effects are: the dust in the material is processed during the loading process, and when the airflow sent in by the air source equipment moves to the bend in the conveying pipe, the airflow moves up along the inner arc surface of the conveyor belt, and the dust in the granular material enters the collecting hole of the extrusion part under the action of the airflow, and further enters the collecting cavity from the collecting hole, thereby reducing the dust entering the next processing step, improving the uniformity of the subsequent melting operation of the material, and ensuring the appearance quality of the finished express bag.

[0011] Preferably, the aperture of the feeding end of the collecting hole decreases along the feeding direction.

[0012] The beneficial effects are: reducing the clogging of the collecting hole by the granular material and preventing the granular material from entering the collecting hole.

[0013] Preferably, the thickness of the extrusion members increases along the moving direction of the conveyor belt, the extrusion members are deformed by extrusion, and each of the extrusion members is in deformation contact with the screening member at the rear side of the conveyor belt.

[0014] The beneficial effects are: it is convenient to clean the materials blocked in the collecting hole in time; when the extrusion piece moves relative to the screening piece, the screening piece squeezes the extrusion piece, causing the extrusion piece to deform slightly when passing through the screening piece, so as to promote the granular materials stuck in the collecting hole to detach relative to the collecting hole, thereby ensuring the normal operation of the collecting hole.

[0015] Preferably, the screening element is provided with a plurality of screening bars, and gaps for the granular material to pass through are formed between adjacent screening bars, and each screening bar is deformed by extrusion.

[0016] Preferably, adjacent screening bars are in contact with the extrusion member at intervals.

[0017] The beneficial effects are: the material blocked on the screening element can be cleaned in time, and when the extrusion element moves relative to the screening bar, the screening bar can also be deformed under the extrusion effect, so that the material stuck between the two screening bars can fall off, thereby ensuring the normal operation of the screening element.

[0018] Preferably, the driving assembly includes a driving source, a driving roller and a driven roller, the driving end of the driving source is fixed to the driving roller, the conveyor belt is simultaneously mounted on the driving roller and the driven roller, and the conveyor belt is in frictional contact with the driving roller and the driven roller.

[0019] Preferably, guide parts are provided on two opposite side walls of the mounting part, the shape of the guide parts is adapted to the curvature of the curved pipe, and the conveyor belt slides in accordance with the guide parts.

[0020] Preferably, a guide plate is provided in the mounting portion, the front and rear ends of the guide plate are respectively opposite to the front and rear ends of the conveyor belt, and the guide plate is opposite to the outer arc side of the conveyor belt.

[0021] A rapid feeding process for express bag production includes the following steps:

[0022] S1, loading preparation, check the loading device provided by the present invention to ensure that it is in normal working condition;

[0023] S2, feeding, adding materials into the feeding part, and monitoring the amount of materials in the feeding part to ensure continuous feeding;

[0024] S3. Record and maintain: record the time and quantity of each loading, and regularly maintain the loading device.

[0025] The beneficial effect is that during the feeding operation, the screening element and the conveying assembly cooperate at the bend to process the agglomerated material, thereby ensuring the quality of the material entering the subsequent processing steps and improving the final production quality of the product.

[0026] The beneficial effects of the present invention are:

[0027] (1) During the feeding operation, the agglomerated materials are processed. After the materials enter the conveying pipe, they flow with the air flow in the conveying pipe. When the materials flow to the feeding end of the elbow, the screening element screens the materials. Normal granular materials pass through the screening element smoothly, while the agglomerated materials are blocked by the screening element and cannot pass through. The agglomerated materials move down along the rear end surface of the screening element and enter the rear end of the mounting part. When the conveying assembly rotates, each extrusion element squeezes the agglomerated materials at the rear end of the mounting part to crush the agglomerated materials. The crushed materials move up between the outer arc surface of the conveyor belt and the inner arc surface of the mounting part as the conveyor belt rotates, and continue to be fed to the next processing step through the elbow together with the granular materials, thereby ensuring the quality of the materials entering the subsequent processing steps and improving the final production quality of the products.

[0028] (2) The dust in the material is processed during the loading process. When the airflow sent by the air source equipment moves to the bend in the conveying pipe, the airflow moves up along the inner arc surface of the conveyor belt. The dust in the granular material enters the collection hole of the extrusion part under the action of the airflow, and further enters the collection cavity from the collection hole, thereby reducing the dust entering the next processing step, improving the uniformity of the subsequent melting operation of the material, and ensuring the appearance quality of the finished express bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the structure inside the elbow in the present invention.

[0031] Figure 3 It is a schematic diagram of the structure of the screening element and the extrusion element in the present invention.

[0032] Reference numerals:

[0033] 1. Feeding part; 2. Air source equipment; 3. Conveying pipeline; 31. Bend pipe; 32. Mounting part; 321. Guide plate; 322. Guide part; 33. Conveyor belt; 331. Driving roller; 332. Driven roller; 333. Driving source; 34. Extrusion part; 341. Collecting hole; 35. Collecting part; 4. Screening part; 41. Screening bar. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 3 As shown, the rapid feeding device for express bag production of the present invention comprises a conveying pipeline 3, a feeding piece 1 and an air source device 2, the discharge end of the feeding piece 1 is connected to the feed end of the conveying pipeline 3, a feeding port is provided on the feeding piece 1, materials are added into the feeding piece from the feeding port, and further enter the feed end of the conveying pipeline 3 evenly through the feeding piece, wherein the feeding piece 1 includes but is not limited to a rotary valve, a screw feeder, and a vibrating feeder, the air source device 2 is used to compress air or suck air when the conveying pipeline 3 conveys materials, the air source device 2 includes but is not limited to a blower, a compressor, and a vacuum pump, the air source device 2 preferably uses a Roots blower, the feeding piece 1 and the air source device 2 are both prior arts, and their specific structures are not repeated here, when the material is conveyed, because it is necessary to change the flow direction of the material according to the feeding position, a bend 31 is provided at the turning point of the conveying pipeline 3, a screening piece 4 and a conveying mechanism are provided at the bend 31, and the screening piece 4 and the conveying mechanism cooperate at the bend 31 to screen and crush the agglomerated materials.

[0036] The screening element 4 is arranged at the feeding end of the curved pipe 31, and a mounting portion 32 is arranged on the outer arc side of the curved pipe 31. The conveying mechanism is installed in the mounting portion 32. The conveying mechanism includes a driving component and a conveyor belt 33. The curvature of the conveyor belt 33 is adapted to the curvature of the curved pipe 31. The driving component drives the conveyor belt 33 to rotate cyclically. The driving component includes a driving source 333, a driving roller 331 and a driven roller 332. The driving end of the driving source 333 is fixed to the driving roller 331. The conveyor belt 33 is simultaneously sleeved on the driving roller 331 and the driven roller 332. The conveyor belt 33 is in frictional contact with the driving roller 331 and the driven roller 332. The opposite side walls of the mounting portion 32 are provided with guide portions 322. The guide portions 322 are provided with guide portions 323. The shape is adapted to the curvature of the curved pipe 31, and the conveyor belt 33 slides in accordance with the guide portion 322. The mounting portion 32 is used to guide and limit the moving path of the conveyor belt 33. A guide plate 321 is provided in the mounting portion 32. The front and rear ends of the guide plate 321 are respectively opposite to the front and rear ends of the conveyor belt 33. The guide plate 321 is opposite to the outer arc side of the conveyor belt 33. The moving direction of the inner arc surface of the conveyor belt 33 is opposite to the conveying direction of the material. A plurality of extrusions 34 are provided on the conveyor belt 33, with the side facing the material conveying direction as the front side. The screening element 4 is inclined from top to bottom to the front side, and there is a gap between the lower end of the screening element 4 and the rear side of the conveyor belt 33 for each extrusion 34 to pass through.

[0037] After the material enters the conveying pipe 3, the air source device 2 sends air flow into the conveying pipe 3, and the material flows with the air flow in the conveying pipe 3. When the material flows to the feeding end of the elbow 31, the screening element 4 screens the material. Normal granular material passes through the screening element 4 smoothly, while the agglomerated material is blocked by the screening element 4 and cannot pass through. The agglomerated material moves down along the rear end surface of the screening element 4 and enters the rear end of the mounting portion 32. When the conveying assembly rotates, each extrusion member 34 squeezes the agglomerated material at the rear end of the mounting portion 32 to crush the agglomerated material. The crushed material moves up between the outer arc surface of the conveyor belt 33 and the inner arc surface of the mounting portion 32 as the conveyor belt 33 rotates, and continues to be fed to the next processing step through the elbow 31 together with the granular material.

[0038] During the transportation of materials, friction between material particles will produce debris, resulting in a certain amount of dust in the material added to the feeding piece 1. The presence of dust will affect the uniformity of material melting, resulting in reduced local strength of the product, or cause spots, bubbles or other appearance defects on the surface of the finished product. In order to ensure the final quality of the product, it is also necessary to deal with the dust in the material during the feeding process.

[0039] To solve the above problems, a collecting hole 341 is provided on the extrusion piece 34, and the side walls of the conveyor belt 33 and the mounting portion 32 are arranged to form a collecting chamber. Each collecting hole 341 is connected to the collecting chamber. A collecting piece 35 is also provided on the outside of the mounting portion 32. The collecting piece 35 is connected to the collecting chamber and is used to extract dust from the collecting chamber. The collecting piece 35 can be a mobile dust collector. The collecting piece 35 and the mounting portion 32 are detachably connected, which is convenient for timely cleaning of the dust in the collecting piece 35 to ensure the normal operation of the collecting piece 35. When the airflow delivered by the air source equipment 2 moves to the bend 31 in the conveying pipe 3, the airflow moves up along the inner arc surface of the conveyor belt 33, and the dust in the granular material enters the collecting hole 341 of the extrusion piece 34 under the action of the airflow, and further enters the collecting chamber from the collecting hole 341.

[0040] In the process of collecting dust in the material, the particulate material may contact the collecting hole 341, causing the collecting hole 341 to be blocked. In order to reduce the possibility of the particulate material blocking the collecting hole 341, the aperture of the feeding end of the collecting hole 341 decreases along the feeding direction. In order to prevent the particulate material from entering the collecting hole 341, the minimum diameter of the collecting hole 341 is smaller than the diameter of the conventional particulate material. In addition, the thickness of the extrusion member 34 increases along the moving direction of the conveyor belt 33, and the extrusion member 34 is deformed by extrusion. Each extrusion member 34 is deformed and contacts with the screening member 4 on the rear side of the conveyor belt 33. Among them, the extrusion member 34 can be made of rubber material, and the extrusion member 34 can be deformed when it is squeezed. If the particulate material is stuck in the collecting hole 341, when the extrusion member 34 moves relative to the screening member 4, the screening member 4 squeezes the extrusion member 34, so that the extrusion member 34 is slightly deformed when passing through the screening member 4, so as to promote the particulate material blocked in the collecting hole 341 to be separated from the collecting hole 341, thereby ensuring that the collecting hole 341 can collect dust normally.

[0041] During the long-term operation of the feeding device, there may be a situation where materials are stuck on the screening element 4 and block the screening element 4. In order to timely clean the materials blocked on the screening element 4 and ensure the normal operation of the screening element 4, a plurality of screening bars 41 are provided on the screening element 4, and gaps for the passage of granular materials are formed between adjacent screening bars 41. Each screening bar 41 is deformed by extrusion. When the extrusion member 34 moves relative to the screening bar 41, the screening bar 41 can also be deformed under the extrusion action, so that the materials stuck between the two screening bars 41 can fall off. In order to further improve the cleaning effect of the blocked materials on the screening bar 41, the adjacent screening bars 41 are contacted with the extrusion member 34 at intervals, so that when the screening bar 41 and the extrusion member 34 are relatively extruded, the gap between the adjacent screening bars 41 is increased, so that the materials can fall off from between the two screening bars 41. One extrusion member 34 is only opposite to one screening bar 41, that is, when the extrusion member 34 and the screening element 4 are relatively extruded, one extrusion member 34 is only in contact with one screening bar 41.

[0042] A rapid feeding process for express bag production includes the following steps:

[0043] S1. Preparation for feeding: Check that the feeding device provided by the present invention is in normal working condition and there is no blockage or damage in the feeding device;

[0044] S2, feeding, adding materials into the feeding part 1. After the raw materials are loaded, the feeding port of the feeding part 1 is closed to prevent the entry of foreign matter. The feeding part 1 continuously conveys the materials to the conveying pipeline 3. At the same time, the feeding speed of the materials is monitored to avoid failure of the feeding device or interruption of production due to too fast or too slow feeding speed;

[0045] S3. Record and maintain. Record the time and quantity of each loading to facilitate subsequent production management and quality control. Regularly perform maintenance on the loading device, including cleaning, lubrication, and inspection of worn parts, to ensure long-term and stable operation of the loading device.

[0046] The rapid feeding device for express bag production provided by the present invention facilitates the processing of agglomerated materials and dusty materials during the feeding operation of the materials, so as to ensure the quality of the materials entering the subsequent processing steps and improve the quality of the final product.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fast feeding device for express bag production, comprising a conveying pipeline (3), a feeding piece (1) and a gas source device (2), wherein the discharge end of the feeding piece (1) is connected to the feed end of the conveying pipeline (3), the gas source device (2) is used to convey gas into the conveying pipeline (3), and the conveying pipeline (3) is provided with a bend (31), characterized in that: A screening element (4) and a conveying mechanism are provided at the curved pipe (31). The screening element (4) is provided at the feed end of the curved pipe (31). A mounting portion (32) is provided on the outer arc side of the curved pipe (31). The conveying mechanism is mounted in the mounting portion (32). The conveying mechanism comprises a driving component and a conveyor belt (33). The curvature of the conveyor belt (33) matches the curvature of the curved pipe (31). The driving component drives the conveyor belt (33) to rotate cyclically. The moving direction of the inner arc surface of the conveyor belt (33) is opposite to the conveying direction of the material. A plurality of extrusion elements (34) are provided on the conveyor belt (33). The side facing the material conveying direction is the front side. The screening element (4) is inclined from top to bottom toward the front side. A gap for each of the extrusion elements (34) to pass through is provided between the lower end of the screening element (4) and the rear side of the conveyor belt (33).

2. The rapid feeding device for express bag production according to claim 1 is characterized in that: The extrusion member (34) is provided with a collecting hole (341), the conveyor belt (33) and the side wall of the mounting portion (32) are arranged to form a collecting cavity, each of the collecting holes (341) is in communication with the collecting cavity, and a collecting member (35) is further provided outside the mounting portion (32), the collecting member (35) is in communication with the collecting cavity and is used to extract dust in the collecting cavity.

3. The rapid feeding device for express bag production according to claim 2 is characterized in that: The aperture of the feeding end of the collecting hole (341) decreases along the feeding direction.

4. The rapid feeding device for express bag production according to claim 2 is characterized in that: The thickness of the extrusion piece (34) increases along the moving direction of the conveyor belt (33), and the extrusion piece (34) is deformed by extrusion, and each of the extrusion pieces (34) is in deformation contact with the screening piece (4) at the rear side of the conveyor belt (33).

5. The rapid feeding device for express bag production according to claim 1 is characterized in that: The screening element (4) is provided with a plurality of screening bars (41), gaps for the granular material to pass through are formed between adjacent screening bars (41), and each screening bar (41) is deformed by extrusion.

6. The rapid feeding device for express bag production according to claim 5 is characterized in that: Adjacent screening bars (41) are in contact with the extrusion member (34) at intervals.

7. The rapid feeding device for express bag production according to claim 1 is characterized in that: The driving assembly comprises a driving source (333), a driving roller (331) and a driven roller (332); a driving end of the driving source (333) is fixed to the driving roller (331); the conveyor belt (33) is simultaneously sleeved on the driving roller (331) and the driven roller (332); and the conveyor belt (33) is in frictional contact with the driving roller (331) and the driven roller (332).

8. The rapid feeding device for express bag production according to claim 1 is characterized in that: Guide portions (322) are provided on two opposite side walls of the mounting portion (32); the shape of the guide portions (322) is adapted to the curvature of the curved pipe (31); and the conveyor belt (33) slides in contact with the guide portions (322).

9. The rapid feeding device for express bag production according to claim 1, characterized in that: A guide plate (321) is provided in the mounting portion (32), the front and rear ends of the guide plate (321) respectively facing the front and rear ends of the conveyor belt (33), and the guide plate (321) facing the outer arc side of the conveyor belt (33).

10. A rapid feeding process for express bag production, characterized in that: The following steps are involved: S1. Loading preparation: check the loading device described in any one of claims 1 to 9 to ensure that it is in normal working condition; S2, feeding, adding materials into the feeding part (1), and monitoring the amount of materials in the feeding part (1) to ensure continuous feeding; S3. Record and maintain: record the time and quantity of each loading, and regularly maintain the loading device.

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