A plastic bag blowing machine

Abstract

The utility model discloses a kind of plastic bag film blowing machine, belong to film blowing machine technical field;Including extruder, machine head, traction device and coiling device, the extruder is set in the traction device lower, the coiling device is set in traction device one side, the extruder one end is set machine head, the other end is set feed inlet, it further includes feeding assembly, and the feeding assembly is set on feed inlet;The feeding assembly includes feed hopper, driving motor, stirring assembly, ration feeding assembly and impurity removal component, the feed hopper upper end is provided with cover plate, driving motor is set on the cover plate, stirring assembly, ration feeding assembly and impurity removal component are sequentially set from top to bottom in the feed hopper, and three are driven by driving motor;The utility model material mixing uniformity and impurity removal rate are higher, and the quality of prepared film product is higher.

Description

Technical Field

[0001] This utility model relates to a plastic bag blown film machine, belonging to the field of blown film machine technology. Background Technology

[0002] Plastic bags are bags made primarily of plastic and are essential items in people's daily lives. They are often used to hold other items and are widely used due to their advantages of being inexpensive, extremely lightweight, large capacity, and easy to store. However, due to the disadvantages of plastic bags, such as their extremely long degradation cycle and difficulty in disposal, some countries have banned their production and use. Most plastic bags used in people's lives are made by blown film machines. The films formed by blown film machines have uniform color, are clean, and have good stretchability.

[0003] A plastic bag blown film machine is a device that heats and melts plastic granules, extrudes them, and blows them into a film. It mainly consists of an extruder, a die head, a cooling device, a traction device, and a winding device. Plastic granules are added to the extruder barrel, heated, and extruded by the screw to form a molten state. Then, they are extruded from the die head to form a tube blank. Air is blown into the tube blank to expand it and cool it to set its shape. After traction and winding, a continuous plastic film is finally obtained. It is widely used in the plastic packaging industry and can be used to produce plastic bags, cling film, and other film products of various specifications and uses.

[0004] Existing blown film machines require plastic raw materials to be poured into the machine's feed inlet for heating and melting. However, the feed inlet of existing blown film machines is open, making it easy for dust and debris to enter and mix with the plastic raw materials. This may result in impurities in the produced plastic film, thus affecting the production quality. Furthermore, the plastic granules used in blown film machines typically need to be mixed and stirred. Mixing ensures the uniform distribution of different plastic granules and additives (such as masterbatches, brighteners, and nucleating agents), preventing problems such as uneven color and fluctuations in mechanical properties in the finished product. However, current blown film machines lack a mixing function at the feed inlet. Insufficient mixing may lead to localized staining and particle agglomeration, affecting the surface smoothness of the film. Uneven melting of the raw materials can easily cause problems such as film bubble rupture and uneven wall thickness, directly impacting product quality and production efficiency. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a plastic bag blown film machine.

[0006] The technical solution adopted in this utility model is as follows: a plastic bag blown film machine is designed, including an extruder, a die head, a traction device, and a winding device. The extruder is arranged below the traction device, and the winding device is arranged on one side of the traction device. The die head is arranged at one end of the extruder, and the feed inlet is arranged at the other end. It also includes a feeding assembly, which is arranged on the feed inlet. The feeding assembly includes a feeding hopper, a drive motor, a stirring assembly, a metering feed assembly, and a purification assembly. A cover plate is provided at the upper end of the feeding hopper, and a feed inlet is arranged on one side of the cover plate. The drive motor is arranged on the cover plate. The stirring assembly, the metering feed assembly, and the purification assembly are arranged sequentially from top to bottom inside the feeding hopper, and all three are driven by the drive motor. The stirring assembly stirs and mixes the material loaded into the feeding hopper, the metering feed assembly meterly feeds the material from the feeding hopper to the extruder, and the purification assembly removes impurities from the metered material fed to the extruder.

[0007] Furthermore, a partition frame is provided inside the feed hopper, which divides the inner cavity of the feed hopper into a stirring chamber and a cleaning chamber. A quantitative feeding channel is provided on the partition frame, and the stirring chamber and the cleaning chamber are connected through the quantitative feeding channel. The stirring component, the quantitative feeding component, and the cleaning component are respectively provided in the stirring chamber, the quantitative feeding channel, and the cleaning chamber.

[0008] Furthermore, a drive shaft is installed at the output end of the drive motor. The drive shaft extends upward from the impurity removal chamber to the stirring chamber and passes through the cover plate to connect with the drive motor. Two sets of stirring blades are arranged on the drive shaft located in the stirring chamber. Each set includes three stirring blades arranged in a circumferential array along the drive shaft. The two sets of stirring blades and the drive shaft on which the stirring blades are installed constitute the stirring assembly.

[0009] Furthermore, a helical blade is provided on the drive shaft located within the quantitative feed channel, and the helical blade and the drive shaft on which the helical blade is mounted constitute the quantitative feed assembly.

[0010] Furthermore, a cleaning screen is provided on the drive shaft located in the cleaning chamber, and the side wall of the cleaning screen is provided with dense screen holes. The cleaning screen and the drive shaft on which the cleaning screen is installed constitute the cleaning assembly.

[0011] Furthermore, the bottom of the impurity removal screen is provided with a neck, and a funnel-shaped guide cover is provided below the neck. A discharge assembly is provided on the feed hopper located below the guide cover. The discharge assembly includes a collection hopper and a discharge pipe. The collection hopper is located below the guide cover, and the discharge pipe connects the inner cavity of the collection hopper to the outside of the feed hopper.

[0012] Furthermore, a support ring is provided inside the feed hopper, and the support ring is connected to the feed hopper by multiple support rods. A step is provided on the inner side of the support ring, and a bearing is provided on the step. A limit ring is provided on the drive shaft, and the limit ring abuts against the bearing.

[0013] Furthermore, the partition frame includes an upper partition plate, a lower partition plate, and a connecting pipe. The upper partition plate and the lower partition plate are respectively provided with circular holes, and the two ends of the connecting pipe are respectively fixed in the circular holes to connect the upper partition plate and the lower partition plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a single drive shaft to simultaneously drive three components: stirring, quantitative feeding, and impurity removal. This simplifies the transmission structure and reduces energy consumption and maintenance costs. The pitch of the spiral blades can be changed according to material characteristics (such as flowability and particle size). For example, a small pitch blade can be used for highly flowable materials to prevent overfeeding. The partition frame has a detachable structure, with the upper and lower partition plates fixed by bolts. This facilitates cleaning or replacement of connecting pipes with different orifice diameters, adapting to various production processes.

[0016] After adopting this utility model, the material mixing uniformity and impurity removal rate are higher, the continuous operation time of the equipment is extended, and energy consumption is reduced. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the front view of this utility model.

[0019] Figure 2 This is a schematic cross-sectional view of the feeding assembly of this utility model.

[0020] Figure 3 This is an isometric view of the feeding assembly of this utility model.

[0021] In the diagram: 1. Extruder; 2. Die head; 3. Traction device; 4. Winding device; 5. Feed hopper; 6. Drive motor; 7. Cover plate; 8. Feed inlet; 9. Separator frame; 10. Mixing chamber; 11. Impurity removal chamber; 12. Quantitative feed channel; 13. Drive shaft; 14. Mixing blades; 15. Spiral blades; 16. Impurity removal screen; 17. Neck; 18. Guide cover; 19. Collection hopper; 20. Discharge pipe; 21. Support rod; 22. Bearing; 23. Upper separator plate; 24. Lower separator plate; 25. Connecting pipe. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical 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 utility model based on the specific circumstances.

[0024] Example 1

[0025] like Figure 1 As shown, a plastic bag blown film machine includes an extruder 1, a die head 2, a traction device 3, and a winding device 4. The extruder 1 is positioned below the traction device 3 (used for traction and cooling of the blown film). The extruder 1 is used to melt and plasticize plastic granules and then convey them to the die head 2. The winding device 4 (used for winding the film into a roll) is located on one side of the traction device 3. The die head 2 (used for forming tubular film bubbles from molten plastic) is located at one end of the extruder 1, and a feed inlet 8 is located at the other end. It also includes a feeding assembly, which is located on the feed inlet 8 and is used to pre-treat the plastic granules and quantitatively feed them to the extruder 1.

[0026] like Figure 2-3As shown, the feeding assembly includes a feeding hopper 5, a drive motor 6, a stirring assembly, a quantitative feeding assembly, and a cleaning assembly. A cover plate 7 is provided at the upper end of the feeding hopper 5. Ribs are generally provided on the lower side of the cover plate 7 to improve its load-bearing capacity and facilitate motor placement. A feed inlet 8 is provided on one side of the cover plate 7 for pouring mixed plastic granules into the feeding hopper 5 for accumulation. The feed inlet 8 can be supplied with material via a screw conveyor, so it can be designed as an elongated slot. To improve the sealing of the feeding hopper 5 and reduce the entry of dust and other impurities when filling it with material, a sealing plate (not shown in the attached diagram) can be provided on the feed inlet 8. One end of the sealing plate is hinged to the feeding hopper 5, and the other end overlaps the cover plate 7. The sealing plate is removed when using the feed inlet 8. The cover plate 7 is equipped with a drive motor 6. The feeding hopper 5 is equipped with a stirring component, a quantitative feeding component and a cleanup component from top to bottom, and all three are driven by the drive motor 6. The drive motor 6 drives the stirring component, the quantitative feeding component and the cleanup component to work synchronously through the drive shaft 13 that passes through the feeding hopper 5, so as to realize the integrated process of material mixing, quantitative feeding and impurity removal.

[0027] The stirring assembly stirs and mixes the material loaded into the feed hopper 5, the quantitative feeding assembly quantitatively feeds the material in the feed hopper 5 to the extruder 1, and the impurity removal assembly removes impurities from the material quantitatively supplied to the extruder 1.

[0028] Example 2

[0029] This embodiment is a further optimization and refinement of the feeding assembly structure based on Embodiment 1, specifically as follows:

[0030] The feed hopper 5 is provided with a partition frame 9, which divides the inner cavity of the feed hopper 5 into a stirring chamber 10 and a cleaning chamber 11. A quantitative feeding channel 12 is provided on the partition frame 9. The stirring chamber 10 and the cleaning chamber 11 are connected through the quantitative feeding channel 12. The stirring component, the quantitative feeding component, and the cleaning component are respectively located in the stirring chamber 10, the quantitative feeding channel 12, and the cleaning chamber 11. They are independent of each other and do not interfere with each other, resulting in higher precision in stirring, quantitative feeding, and cleaning.

[0031] In this embodiment, the partition frame 9 includes an upper partition plate 23, a lower partition plate 24, and a connecting pipe 25. The upper partition plate 23 and the lower partition plate 24 are respectively provided with circular holes, and the two ends of the connecting pipe 25 are respectively fixed in the circular holes to connect the upper partition plate 23 and the lower partition plate 24.

[0032] Example 3

[0033] This embodiment is a further optimization and refinement of the feeding assembly structure based on Embodiment 2, specifically as follows:

[0034] The output end of the drive motor 6 is equipped with a drive shaft 13. The drive shaft 13 extends upward from the impurity removal chamber 11 to the stirring chamber 10, and passes through the cover plate 7 to connect with the drive motor 6. Two sets of stirring blades 14 are arranged on the drive shaft 13 within the stirring chamber 10. Each set includes three stirring blades 14 arranged in a circumferential array along the drive shaft 13. The two sets of stirring blades 14 and the drive shaft 13 on which the stirring blades 14 are mounted constitute the stirring assembly. During operation, the stirring blades 14 thoroughly stir the plastic granules entering the feed hopper 5, preventing material agglomeration or uneven distribution.

[0035] In this embodiment, a helical blade 15 is provided on the drive shaft 13 located in the quantitative feeding channel 12. The helical blade 15 and the drive shaft 13 on which the helical blade 15 is mounted constitute the quantitative feeding assembly. The pitch and diameter of the helical blade 15 are designed according to the feeding rate of the extruder 1. By adjusting the speed of the drive motor 6, the amount of material entering the impurity removal chamber 11 per unit time can be precisely controlled to achieve quantitative feeding.

[0036] In this embodiment, a cleaning screen 16 is mounted on the drive shaft 13 located within the cleaning chamber 11. The cleaning screen 16 has densely packed screen holes on its sidewall. The cleaning screen 16 and the drive shaft 13 on which the cleaning screen 16 is mounted constitute the cleaning assembly. The cleaning assembly is located within the cleaning chamber 11. When the drive shaft 13 drives the cleaning screen 16 to rotate at high speed, plastic particles pass through the screen holes and enter the extruder 1 under centrifugal force. Large impurities, due to their excessive size, are blocked within the cleaning screen 16 and eventually fall into the collection hopper 19 through the neck 17.

[0037] Example 4

[0038] This embodiment is a further optimization and refinement of the impurity removal component structure based on Embodiment 3, specifically as follows:

[0039] The bottom of the impurity removal screen 16 is provided with a neck 17, and a funnel-shaped guide cover 18 is provided below the neck 17. A discharge assembly is provided on the feed hopper 5 located below the guide cover 18. The discharge assembly includes a collection hopper 19 and a discharge pipe 20. The collection hopper 19 is located below the guide cover 18 and is used to receive large particle impurities after screening. The discharge pipe 20 connects the inner cavity of the collection hopper 19 with the outside of the feed hopper 5 so as to discharge the large particle impurities in the collection hopper 19 out of the feed hopper 5. It can be understood that the discharge pipe 20 is inclined, which is more conducive to the discharge of impurities.

[0040] Example 5

[0041] This embodiment is a further optimization and refinement of the feeding assembly structure based on embodiment 4, specifically as follows:

[0042] A support ring is provided inside the feed hopper 5. The support ring is connected to the feed hopper 5 by multiple support rods 21. A step is provided on the inner side of the support ring. A bearing 22 is provided on the step. A limit ring is provided on the drive shaft 13. The limit ring abuts against the bearing 22 to provide reliable support for the drive shaft 13.

[0043] Specific Work Process

[0044] 1. Material input and mixing: The operator opens the sealing plate at the top of the feed hopper 5 and puts the mixed plastic granules into the mixing chamber 10 through the feed port 8. After the drive motor 6 is started, the mixing blades 14 rotate at a speed of 30-60 r / min to continuously mix the material and discharge it at the same time.

[0045] 2. Quantitative feeding to the impurity removal chamber 11: During the mixing process, the material enters the connecting pipe 25 under the action of gravity, and the spiral blades 15 push the material evenly to the impurity removal chamber 11 at a constant speed. The feeding amount of the spiral blades 15 can be controlled by adjusting the speed of the drive motor 6. For example, when the capacity of the extruder 1 is 50 kg / h, the speed of the spiral blades 15 is set to 10 r / min.

[0046] 3. Centrifugal impurity removal and collection: The material entering the impurity removal chamber 11 is thrown against the side wall by the high-speed rotating impurity removal screen 16. Qualified particles pass through the screen holes and enter the extruder 1. Impurities are retained in the impurity removal screen 16 and eventually fall into the collection hopper 19 through the neck 17, and then are discharged through the discharge pipe 20. Operators can periodically open the discharge pipe 20 to clean the impurities.

[0047] 4. Melt extrusion and film forming: After the impurities are removed, the plastic granules enter the extruder 1, are heated and melted, plasticized, and formed into film bubbles through the die head 2. They are then cooled and shaped by the traction device 3, and finally wound into finished products by the winding device 4.

[0048] Furthermore, in the description of this utility model, unless otherwise stated, the terms "multiple," "multiple roots," and "multiple groups" mean two or more, and "several," "several roots," and "several groups" mean one or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance.

[0049] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A plastic bag blown film machine, comprising an extruder, a die head, a traction device, and a winding device, wherein the extruder is disposed below the traction device, the winding device is disposed on one side of the traction device, the die head is disposed at one end of the extruder, and a feed inlet is disposed at the other end, characterized in that: It also includes a feeding assembly, which is disposed on the feeding port; The feeding assembly includes a feeding hopper, a drive motor, a stirring assembly, a quantitative feeding assembly, and a cleaning assembly. The upper end of the feeding hopper is provided with a cover plate, and a feeding port is provided on one side of the cover plate. The drive motor is provided on the cover plate. The stirring assembly, the quantitative feeding assembly, and the cleaning assembly are arranged sequentially from top to bottom inside the feeding hopper, and all three are driven by the drive motor. The stirring assembly mixes the material fed into the hopper, the metering feeding assembly feeds the material from the hopper to the extruder in a metered manner, and the impurity removal assembly removes impurities from the material fed to the extruder in a metered manner.

2. The plastic bag blown film machine according to claim 1, characterized in that: The feed hopper is provided with a partition frame, which divides the inner cavity of the feed hopper into a stirring chamber and a cleaning chamber. A quantitative feeding channel is provided on the partition frame, and the stirring chamber and the cleaning chamber are connected through the quantitative feeding channel. The stirring component, the quantitative feeding component, and the cleaning component are respectively provided in the stirring chamber, the quantitative feeding channel, and the cleaning chamber.

3. The plastic bag blown film machine according to claim 2, characterized in that: The output end of the drive motor is equipped with a drive shaft. The drive shaft extends upward from the impurity removal chamber to the stirring chamber and passes through the cover plate to connect with the drive motor. The drive shaft located in the stirring chamber is provided with two sets of stirring blades, each set including three stirring blades arranged in a circumferential array along the drive shaft. The two sets of stirring blades and the drive shaft on which the stirring blades are installed constitute the stirring assembly.

4. The plastic bag blown film machine according to claim 3, characterized in that: A helical blade is provided on the drive shaft located in the quantitative feed channel, and the helical blade and the drive shaft on which the helical blade is mounted constitute the quantitative feed assembly.

5. The plastic bag blown film machine according to claim 4, characterized in that: A cleaning screen is installed on the drive shaft located in the cleaning chamber. The side wall of the cleaning screen is provided with dense screen holes. The cleaning screen and the drive shaft on which the cleaning screen is installed constitute the cleaning assembly.

6. The plastic bag blown film machine according to claim 5, characterized in that: The bottom of the impurity removal screen is provided with a neck, and a funnel-shaped guide cover is provided below the neck. A discharge assembly is provided on the feed hopper located below the guide cover. The discharge assembly includes a collection hopper and a discharge pipe. The collection hopper is located below the guide cover, and the discharge pipe connects the inner cavity of the collection hopper to the outside of the feed hopper.

7. The plastic bag blown film machine according to claim 3, characterized in that: A support ring is provided inside the feed hopper, and the support ring is connected to the feed hopper by multiple support rods. A step is provided on the inner side of the support ring, and a bearing is provided on the step. A limit ring is provided on the drive shaft, and the limit ring abuts against the bearing.

8. The plastic bag blown film machine according to claim 4, characterized in that: The partition frame includes an upper partition plate, a lower partition plate, and a connecting pipe. The upper partition plate and the lower partition plate are respectively provided with circular holes, and the two ends of the connecting pipe are respectively fixed in the circular holes to connect the upper partition plate and the lower partition plate.

Images