Feeding device for PE bag production

Abstract

The invention relates to the technical field of PE bag production, and particularly discloses a feeding device for PE bag production. Comprising double spiral conveying sets which are communicated and arranged front and back, a feeding pipe which is arranged on one spiral conveying set and used for being connected with a storage box, and a discharging assembly which is arranged on the other spiral conveying set and used for being connected with a hopper and an extruding machine. A partition plate and a communicating cavity are arranged in the double-screw conveying set, an extruding and dispersing assembly used for extruding materials is arranged at the position of the communicating cavity, the double-screw conveying set is obliquely arranged, and the communicating cavity is located at the lowest point of the double-screw conveying set. The device solves the problems that a traditional spiral feeding machine only has a conveying function and does not have a conveying and stirring function, so that the raw material adhesion phenomenon is caused, and the product quality is low due to the incomplete mixing phenomenon of the raw materials.

Description

Technical Field

[0001] The present application relates to the technical field of PE bag production, and specifically discloses a feeding device for PE bag production. Background Art

[0002] A PE bag is a plastic bag made of polyethylene (abbreviated as PE). Due to its non-toxic, durable, low-cost and other characteristics, it is widely used in various packaging scenarios;

[0003] "Feeding" in PE bag production refers to the initial step of putting polyethylene (PE) raw materials (usually in granular form) into the production equipment, which is the first key link in the production process of plastic films or plastic bags;

[0004] Regarding the feeding method: Manual feeding: In small factories, granules may be directly poured into the hopper of the extruder with a shovel or container. Automatic feeding: Large production lines are equipped with suction feeders, vacuum feeders or screw feeders, which automatically transport the granules to the hopper through pipelines to achieve dust-free and efficient feeding;

[0005] Finally, the material enters the screw of the extruder through the hopper, is melted into a plastic melt under the action of heating and shearing, and then is formed into a film or a bag through a die.

[0006] Currently, for a screw feeder, it is a common screw feeding mechanism or device. However, for PE bags, the raw materials usually include LDPE, HDPE, LLDPE (used alone or in combination) and auxiliary raw materials: masterbatch, antioxidant, antiblocking agent, antistatic agent, etc. Before entering the feeding device, they are usually stored in a storage tank. However, for the production process of PE bags, it is usually required to be extruded after mixing and stirring. The current screw feeder only has the function of transportation, that is, the function of transporting various raw materials in the storage tank to the hopper, and does not have the function of transportation and stirring. And in actual situations, there are also problems of raw material adhesion after various raw materials are piled up in the storage tank. Since the screw feeder only has the function of transportation and does not have the function of stirring and mixing, the product quality is very poor after entering the extruder through the hopper. In view of this, the present invention provides a feeding device for PE bag production to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the problem of low product quality caused by the traditional screw feeder only having the transportation function and not having the transportation and stirring function, which leads to raw material adhesion and insufficient mixing of raw materials.

[0008] To achieve the above purpose, the present invention provides the following basic solution:

[0009] A feeding device for PE bag production, comprising a double - helix conveying group arranged in series front - to - back and connected, a feed pipe for connecting a storage tank arranged on one of the helix conveying groups, and a discharge assembly arranged on the other helix conveying group for connecting a hopper and an extruder;

[0010] Inside the double - helix conveying group, there are partition plates and a communication cavity. At the position of the communication cavity, there is an extrusion and dispersion assembly for material extrusion. The double - helix conveying group is inclined, and the communication cavity is located at the lowest point of the double - helix conveying group;

[0011] It further includes a power transmission assembly arranged on the other helix conveying group. The discharge assembly includes a connecting cylinder connected to the hopper and the extruder, and a rotary extrusion and stirring assembly arranged on the connecting cylinder. The rotary extrusion and stirring assembly is driven by the power transmission assembly.

[0012] Furthermore, the double - helix conveying group includes a housing, a first installation cavity built inside the housing, a second installation cavity built inside the housing, a cover plate detachably connected to the housing, several support columns, a reducer box, a reducer placed inside the reducer box, a first motor, and a second motor.

[0013] Furthermore, the output shaft of the first motor is connected to a reducer and then to a first shaft. The first shaft is coaxially connected to a first spiral conveying roller. The first spiral conveying roller is installed in the first installation cavity, and the free end of the first spiral conveying roller is rotatably connected to the inner wall of the first installation cavity. The output shaft of the second motor is connected to a reducer and then to a second shaft. The second shaft is coaxially connected to a second spiral conveying roller. The second spiral conveying roller is installed in the second installation cavity, and the free end of the second spiral conveying roller passes through the second installation cavity and is connected to the power transmission assembly.

[0014] Furthermore, the support columns are fixedly connected to both ends of the housing. The support columns have a height to incline the double - helix conveying group. The partition plate is arranged between the first installation cavity and the second installation cavity. A number of installation holes are provided on the partition plate and the housing. The cover plate and the housing are connected through the installation holes. A secondary plate is fixedly connected to the cover plate. The secondary plate is provided with a connecting plate for connecting the partition plate. After the cover plate and the housing are installed, the secondary plate closes the first installation cavity and the second installation cavity.

[0015] Furthermore, the first spiral conveying roller and the second spiral conveying roller have the same structure, both being variable - pitch structures. One end of the first spiral conveying roller close to the output shaft of the first motor is a long pitch, and the other end far from the output shaft of the first motor is a short pitch. One end of the second spiral conveying roller close to the output shaft of the second motor is a long pitch, and the other end far from the output shaft of the second motor is a short pitch.

[0016] Further, the power transmission component includes a driving wheel, a driven wheel, and a transmission belt wound around the driving wheel and the driven wheel. The driving wheel is connected to the free end of the second spiral conveyor roller passing through the second installation cavity. One end of the driven wheel is fixedly connected to the rotary extrusion and stirring component, and a fixing rod is provided at the other end of the driven wheel. A rotating bearing is provided at the connection between the fixing rod and the driven wheel.

[0017] Further, the interior of the connecting cylinder includes an upper connection port, a cylindrical port, and a lower connection port. The upper connection port, the cylindrical port, and the lower connection port are in communication, and the rotary extrusion and stirring component is installed in the cylindrical port.

[0018] Further, the rotary extrusion and stirring component includes a stirring cylinder and arc-shaped extrusion plates circumferentially and evenly arranged around the stirring cylinder. A rotating rod is connected to the stirring cylinder. The rotating rod is installed at the position of the cylindrical port, and a connecting bearing is provided at the connection between the rotating rod and the cylindrical port.

[0019] Further, the size of the stirring cylinder is larger than the size of the cylindrical port.

[0020] Further, the arc-shaped extrusion plates can be in contact with the inner wall of the cylindrical port.

[0021] The principle and effect of this solution are as follows:

[0022] 1. Compared with the prior art, the structure of this device is simple and ingenious. This device is provided with a double spiral conveyor group to transport raw materials and additives through the double spiral conveyor group, and stir and extrude and mix the raw materials and additives during the transportation of the raw materials and additives, which is beneficial to cooperate with the subsequent extruder, thus solving the problem of low product quality caused by the traditional spiral feeder only having a transportation function and lacking a transportation and stirring function, resulting in raw material sticking and insufficient mixing of raw materials.

[0023] 2. Compared with the prior art, a partition and a communication cavity are provided inside the double spiral conveyor group, and an extrusion and dispersion component for material extrusion is provided at the position of the communication cavity. The material is extruded and dispersed through the extrusion and dispersion component, and then enters the discharging component during further transportation. The raw materials and additives are stirred and dispersed by the action of the discharging component, accelerating the mixing of the raw materials and additives, which is beneficial to cooperate with the subsequent extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 The structural schematic diagram of a feeding device for PE bag production proposed by an embodiment of the present application is shown;

[0026] Figure 2 The top view schematic diagram of a feeding device for PE bag production proposed by an embodiment of the present application is shown;

[0027] Figure 3 The front view schematic diagram of a feeding device for PE bag production proposed by an embodiment of the present application is shown;

[0028] Figure 4 The connection schematic diagram after magnifying part A in a feeding device for PE bag production proposed by an embodiment of the present application is shown; Figure 3 in which;

[0029] Figure 5 The structural schematic diagram of a driven wheel in a feeding device for PE bag production proposed by an embodiment of the present application is shown. Specific Embodiments

[0030] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific embodiments, structures, features, and their effects of the present invention as follows.

[0031] The reference numerals in the accompanying drawings of the specification include: first shaft 1, support column 2, reducer box 3, flip cover 4, second shaft 5, cover plate 6, auxiliary plate 7, connection hole 8, feed pipe 9, discharge assembly 10, housing 11, first spiral conveyor roller 12, second spiral conveyor roller 13, mounting hole 14, partition 15, extrusion and dispersion assembly 16, frame 1601, cross bar 1602, vertical bar 1603, driving wheel 17, storage box 18, driven wheel 19, rotating rod 20, connection bearing 21, stirring cylinder 22, connection cylinder 23, arc-shaped extrusion plate 24, upper connection port 25, lower connection port 26, cylindrical port 27, rotating bearing 28, fixed rod 29.

[0032] Embodiments are as Figures 1 - 5 shown:

[0033] A feeding device for PE bag production includes a double spiral conveyor group arranged in series and communicating, a feed pipe 9 for connecting the storage box 18 arranged on one of the spiral conveyor groups, and a discharge assembly 10 for connecting a hopper and an extruder arranged on the other spiral conveyor group;

[0034] A partition 15 and a communication cavity are arranged inside the double spiral conveyor group, and an extrusion and dispersion assembly 16 for material extrusion is arranged at the position of the communication cavity. The double spiral conveyor group is inclined, and the communication cavity is located at the lowest point of the double spiral conveyor group;

[0035] It further includes a power transmission component arranged on another set of spiral conveyor groups. The discharging component 10 includes a connecting cylinder 23 connected to the hopper and the extruder, and a rotating extrusion and stirring component arranged in the connecting cylinder 23. The rotating extrusion and stirring component is driven by the power transmission component.

[0036] Regarding the double spiral conveyor group: As Figure 1 shown, the double spiral conveyor group includes a housing 11, a first installation cavity built in the housing 11, a second installation cavity built in the housing 11, a cover plate 6 detachably connected to the housing 11, several support columns 2, a reducer box 3, a reducer placed in the reducer box 3, a first motor and a second motor.

[0037] The output shaft of the first motor is connected to a reducer and then to a first shaft 1. The first shaft 1 is coaxially connected to a first spiral conveyor roller 12. The first spiral conveyor roller 12 is installed in the first installation cavity. The free end of the first spiral conveyor roller 12 is rotatably connected to the inner wall of the first installation cavity. The output shaft of the second motor is connected to a reducer and then to a second shaft 5. The second shaft 5 is coaxially connected to a second spiral conveyor roller 13. The second spiral conveyor roller 13 is installed in the second installation cavity. The free end of the second spiral conveyor roller 13 passes through the second installation cavity and is connected to the power transmission component. A flip cover 4 is arranged on the reducer box 3. The flip cover 4 is used to check the reducer located in the reducer box 3.

[0038] The support columns 2 are fixedly connected to both ends of the housing 11. The support columns 2 have a height to incline the double spiral conveyor group. A partition 15 is arranged between the first installation cavity and the second installation cavity. A number of installation holes 14 are arranged on the partition 15 and the housing 11. The cover plate 6 and the housing 11 are connected through the installation holes 14. A sub-board 7 is fixedly connected to the cover plate 6. A connection hole 8 is arranged on the sub-board 7. The sub-board 7 is provided with a connecting plate for connecting the partition 15. After the cover plate 6 and the housing 11 are installed, the first installation cavity and the second installation cavity are closed by the connection hole 8 and screws on the sub-board 7.

[0039] The first spiral conveyor roller 12 and the second spiral conveyor roller 13 have the same structure and are both of variable pitch structure. One end of the first spiral conveyor roller 12 close to the output shaft of the first motor has a long pitch, and the other end far from the output shaft of the first motor has a short pitch. One end of the second spiral conveyor roller 13 close to the output shaft of the second motor has a long pitch, and the other end far from the output shaft of the second motor has a short pitch.

[0040] Regarding the extrusion and dispersion component 16:

[0041] The extrusion dispersing component 16 includes a frame 1601, a horizontal bar 1602 and a vertical bar 1603 arranged in the frame 1601, the horizontal bar 1602 and the vertical bar 1603 are arranged in a staggered manner, and the double-screw conveying group is arranged obliquely. The raw materials and additives are transported to the extrusion dispersing component 16 by gravity and the oblique arrangement of the double-screw conveying group, and the raw materials and additives are extruded through the holes formed by the staggered arrangement of the horizontal bar 1602 and the vertical bar 1603, so as to complete the dispersion of the raw materials and additives;

[0042] At this time, the raw materials and additives enter the second installation cavity in the double screw conveying group, and are moved toward the discharge assembly 10 by the action of the second screw conveying roller 13. The variable pitch structure can take into account both conveying capacity and uniformity, and is suitable for high-intensity flow operations or complex material combinations.

[0043] The outlet end of the second spiral conveying roller 13 is reasonably utilized, and the outlet end of the second spiral conveying roller 13 is connected to the power transmission component.

[0044] The power transmission assembly includes a driving wheel 17 connected to the free end of the second spiral conveying roller 13 passing through the second mounting cavity, a driven wheel 19, and a transmission belt wound around the driving wheel 17 and the driven wheel 19. One end of the driven wheel 19 is fixedly connected to the rotating extrusion stirring assembly, and the other end of the driven wheel 19 is provided with a fixing rod 29. A rotating bearing 28 is provided at the connection between the fixing rod 29 and the driven wheel 19.

[0045] Specifically: the driving wheel 17 rotates under the action of the second spiral conveying roller 13, and drives the driven wheel 19 to rotate based on the action of the transmission belt. Regarding the driven wheel 19:

[0046] One end of the driven wheel 19 is fixedly connected to the rotating extrusion stirring assembly, and the other end of the driven wheel 19 is provided with a fixing rod 29, so that the rotating extrusion stirring assembly can rotate. The fixing rod 29 is used to fix the position of the driven wheel 19. Since the driven wheel 19 needs to rotate, in order to prevent movement interference, a rotating bearing 28 is provided at the connection between the fixing rod 29 and the driven wheel 19.

[0047] About connecting tube 23:

[0048] The connecting cylinder 23 includes an upper connecting port 25 , a cylindrical port 27 and a lower connecting port 26 . The upper connecting port 25 , the cylindrical port 27 and the lower connecting port 26 are connected, and the rotating extrusion stirring assembly is installed in the cylindrical port 27 .

[0049] The upper connection port 25 and the lower connection port 26 are aligned with the upper and lower parts of the connection cylinder 23. The upper part of the connection cylinder 23 is communicated with the bottom of the second installation cavity, and the lower part of the connection cylinder 23 is used to connect the hopper and the input end of the extruder.

[0050] The rotary extrusion stirring assembly includes a stirring barrel 22 and arc-shaped extrusion plates 24 circumferentially and uniformly arranged around the stirring barrel 22. A rotary rod 20 is connected to the stirring barrel 22. The rotary rod 20 is installed at the position of the cylindrical opening 27, and a connecting bearing 21 is provided at the connection between the rotary rod 20 and the cylindrical opening 27.

[0051] The rotary rod 20 is concentrically connected to the driven wheel 19. The connecting bearing 21 facilitates the rotation of the rotary rod 20 without affecting the connecting barrel 23. The size of the stirring barrel 22 is larger than that of the cylindrical opening 27 to improve the overall stirring effect. The arc-shaped extrusion plate 24 can contact the inner wall of the cylindrical opening 27.

[0052] Specifically: The raw materials and additives enter the upper connection port 25 and then enter the cylindrical opening 27. At this time, the stirring barrel 22 drives the arc-shaped extrusion plate 24 to act on the raw materials and additives located in the cylindrical opening 27, stirring, extruding, and dispersing the raw materials and additives. After the stirring, extruding, and dispersing, the raw materials and additives enter the lower connection port 26 due to gravity, enter the hopper and the input end of the extruder through the lower connection port 26, and finally complete the extrusion molding with the input end of the extruder to form products.

[0053] This device solves the problem of the low product quality caused by the traditional screw feeder only having a transportation function and lacking a transportation and stirring function, which leads to the phenomena of raw material adhesion and insufficient mixing of raw materials.

[0054] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A feeding device for PE bag production, characterized in that, It includes a double - helix conveying group that is connected and arranged front - to - back, a feed pipe for connecting a storage bin provided on one of the helix conveying groups, and a discharge assembly for connecting a hopper and an extruder provided on the other helix conveying group; A partition and a communication cavity are arranged inside the double - helix conveying group. An extrusion and dispersion assembly for material extrusion is arranged at the position of the communication cavity. The double - helix conveying group is inclined, and the communication cavity is located at the lowest point of the double - helix conveying group; It also includes a power transmission assembly provided on the other helix conveying group. The discharge assembly includes a connecting cylinder connected to the hopper and the extruder, and a rotary extrusion and stirring assembly arranged inside the connecting cylinder. The rotary extrusion and stirring assembly is driven by the power transmission assembly.

2. The feeding device for PE bag production according to claim 1, characterized in that, The double - helix conveying group includes a housing, a first installation cavity built in the housing, a second installation cavity built in the housing, a cover plate detachably connected to the housing, several support columns, a reducer box, a reducer placed in the reducer box, a first motor, and a second motor.

3. The feeding device for PE bag production according to claim 2, characterized in that, The output shaft of the first motor is connected to a reducer and then to a first shaft. The first shaft is coaxially connected to a first helix conveying roller. The first helix conveying roller is installed in the first installation cavity, and the free end of the first helix conveying roller is rotatably connected to the inner wall of the first installation cavity. The output shaft of the second motor is connected to a reducer and then to a second shaft. The second shaft is coaxially connected to a second helix conveying roller. The second helix conveying roller is installed in the second installation cavity, and the free end of the second helix conveying roller passes through the second installation cavity and is connected to the power transmission assembly.

4. The feeding device for PE bag production according to claim 3, characterized in that, The support columns are fixedly connected to both ends of the housing. The support columns have a height to incline the double - helix conveying group. The partition is arranged between the first installation cavity and the second installation cavity. Several installation holes are arranged on the partition and the housing. The cover plate and the housing are connected through the installation holes. A secondary plate is fixedly connected to the cover plate. The secondary plate is provided with a connecting plate for connecting the partition. After the cover plate and the housing are installed, the secondary plate closes the first installation cavity and the second installation cavity.

5. The feeding device for PE bag production according to claim 3 or 4, characterized in that, The first helix conveying roller and the second helix conveying roller have the same structure, both being variable - pitch structures. One end of the first helix conveying roller close to the output shaft of the first motor has a long pitch, and the other end far from the output shaft of the first motor has a short pitch. One end of the second helix conveying roller close to the output shaft of the second motor has a long pitch, and the other end far from the output shaft of the second motor has a short pitch.

6. The feeding device for PE bag production according to claim 4, characterized in that, The power transmission assembly includes a driving wheel connected to the free end of the second helix conveying roller passing through the second installation cavity, a driven wheel, and a transmission belt wound around the driving wheel and the driven wheel. One end of the driven wheel is fixedly connected to the rotary extrusion and stirring assembly, and a fixed rod is arranged at the other end of the driven wheel. A rotating bearing is arranged at the connection between the fixed rod and the driven wheel.

7. The feeding device for PE bag production according to claim 6, characterized in that, The inside of the connecting cylinder includes an upper connection port, a cylindrical port, and a lower connection port. The upper connection port, the cylindrical port, and the lower connection port are connected. The rotary extrusion and stirring assembly is installed in the cylindrical port.

8. The feeding device for PE bag production according to claim 7, characterized in that, The rotary extrusion stirring assembly includes a stirring cylinder and arc-shaped extrusion plates circumferentially and uniformly arranged around the stirring cylinder. A rotary rod is connected to the stirring cylinder. The rotary rod is installed at the position of the cylindrical opening, and a connecting bearing is provided at the connection between the rotary rod and the cylindrical opening.

9. The feeding device for PE bag production according to claim 8, wherein The size of the stirring cylinder is larger than that of the cylindrical opening.

10. The feeding device for PE bag production according to claim 8, characterized in that, The arc-shaped extrusion plate can contact the inner wall of the cylindrical opening.

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