Dustproof film blowing machine for plastic bag production

Abstract

This disclosure relates to the field of blown film machine technology. One embodiment of this disclosure provides a dustproof blown film machine for plastic bag production, which includes a blown film machine body. The blown film machine body includes a worktable and a hopper, and also includes a feeding frame, a baffle, a dust collection component, a filter component, and a drive mechanism. The side wall of the feeding frame has a feeding port, and one end of the feeding frame is connected to one end of the feeding port. A baffle is hinged at the feeding port to seal the feeding frame. The dust collection component is set on the worktable and is used to work with the baffle to suck out the dust generated in the feeding frame. Two filter components are slidably arranged in the feeding frame, and the feeding port is located between the two filter components to prevent the raw material from being sucked out by the dust collection components and to filter impurities in the raw material. The drive mechanism is set on the worktable and is used to drive the two filter components to move out of the feeding frame. The above technical solution solves the technical problem in the prior art that the dumping of plastic raw materials into the hopper and the easy generation and dispersion of dust during processing are difficult to handle.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of blown film machine technology, and more specifically, to a dustproof blown film machine for plastic bag production. Background Technology

[0002] A blown film machine is a device that heats and melts plastic particles and then blows them into a thin film. It can be used to produce plastic bags. The general working process is as follows: dry plastic particles are added to the hopper and enter the screw by their own weight. The screw rotates, and its inclined surfaces generate a pushing force on the plastic particles, pushing them forward. During this process, the friction between the plastic and the screw and the barrel, as well as the collision friction between the particles, generate heat. Combined with the external heating of the barrel, the plastic particles gradually melt into molten plastic. Then, the film is formed, cooled, and wound up. In the existing technology, during the production of plastic bags using a blown film machine, dust is easily generated when plastic granules (raw materials) are poured into the hopper because the hopper is connected to the outside world. This is especially true when powdered additives (such as color masterbatch and fillers) are added, which will raise fine particles. In addition, there may be impurities in the plastic granules. After the raw materials enter the hopper and then the screw, the rotation of the screw will also cause the raw material dust to escape and be transferred outside the blown film machine through the hopper. This may cause the dust to escape and adhere to the generated plastic film, resulting in defects such as spots, holes, and crystal points in the film. Utility Model Content

[0003] To overcome the above-mentioned defects, embodiments of this disclosure provide a dustproof blown film machine for plastic bag production, which solves the technical problems in the prior art where plastic raw materials are poured into the hopper and dust is easily generated and scattered during processing, making it difficult to handle.

[0004] According to one aspect, at least one embodiment of this disclosure provides a dustproof blown film machine for plastic bag production, including a blown film machine body. The blown film machine body includes a worktable, a heating and stirring chamber is provided on the worktable, and a hopper is connected to the heating and stirring chamber. It also includes a feeding frame, a baffle, a dust collection component, a filter component, and a drive mechanism. The side wall of the feeding frame has a feeding port, one end of the feeding frame is connected to one end of the feeding port, and the baffle is hinged to the feeding port to seal the feeding frame. The dust collection component is provided on the worktable and is used to cooperate with the baffle to suck out the dust generated in the feeding frame. Two filter components are slidably arranged in the feeding frame, and the feeding port is located between the two filter components to prevent the raw material from being sucked out by the dust collection component and to filter impurities in the raw material. The drive mechanism is provided on the worktable and is used to drive the two filter components to move out of the feeding frame.

[0005] Preferably, the dust collection assembly includes a negative pressure fan, a discharge pipe, and a storage tank. The negative pressure fan is installed on the workbench. One end of the discharge pipe is connected to the top of the feed frame, and the other end is connected to the input end of the negative pressure fan. One end of the storage tank is connected to the output end of the negative pressure fan through the feed pipe.

[0006] Furthermore, the filter assembly includes a mounting frame, a filter screen, and a snap-fit ​​component. The feed frame has a groove that mates with the mounting frame. The mounting frame slides with the inner wall of the groove. The filter screen slides with the inner wall of the mounting frame. The snap-fit ​​component is disposed on the filter screen and the mounting frame for fixing the filter screen.

[0007] Furthermore, the snap-fit ​​component includes an insert plate and a slot. The insert plate is fixedly connected to both ends of the filter screen. Two slots are provided on the mounting frame, and the insert plate slides into the inner wall of the slot.

[0008] As a further embodiment of this application, the driving mechanism includes a vertical plate, a horizontal plate, and an electric cylinder. The feeding frame has two through slots that cooperate with the mounting frame. One end of each of the two mounting frames is fixedly connected to one end of the vertical plate. There are two vertical plates. The side walls of the two vertical plates are respectively fixedly connected to both ends of the horizontal plate. The electric cylinder is mounted on one side of the feeding frame through a mounting bracket. The output end of the electric cylinder is fixedly connected to the horizontal plate.

[0009] As a further embodiment of this application, in order to fix the mounting frame by inserting it into the slide groove, and to fix the insert plate by the cooperation of the slide groove and the slot, the slide groove is U-shaped, and one end of the insert plate abuts against and slides against the inner top wall of the slide groove.

[0010] As a further improvement of this application, in order to prevent dust in the feed frame from being moved out through the through groove and to maintain the sealing of the feed frame, a rubber sealing gasket is fitted on the mounting frame, and the inner walls of the slide groove and the through groove are both in contact with the rubber sealing gasket.

[0011] As a further improvement in this application, in order to stably fix the discharge pipe, both the feed frame and the worktable are provided with support frames, which are used to support and fix the discharge pipe.

[0012] The beneficial effects of the embodiments disclosed herein are as follows: 1. In this disclosure, through the cooperation of the feeding frame, baffle, dust collection component and filter component, by rotating to open the baffle, the packaging bag containing plastic raw materials is cut open, and the plastic raw materials are gently poured into the feeding frame through the feeding port. Rotating the baffle in the opposite direction starts the negative pressure fan. The negative pressure fan creates a local negative pressure environment, and the dust and air in the feeding frame are extracted by the air pressure difference and transferred to the storage box through the discharge pipe, negative pressure fan and feeding pipe. This can filter out impurities mixed in the raw materials. When the negative pressure fan is working, it prevents the raw materials and impurities from being sucked out of the feeding frame through the discharge pipe. It also sucks out the air and some dust in the feeding frame. When the blown film machine is working, the dust generated in the heating and mixing chamber is driven by the negative pressure fan to move out of the feeding frame through the discharge pipe, avoiding the dust from escaping in the feeding frame. 2. In this disclosure, the electric cylinder is activated to drive the two mounting frames to move out of the feed frame through the cooperation of the filter assembly and the drive mechanism, which facilitates the replacement of the filter screen. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present disclosure; Figure 2 This is a structural schematic diagram from another perspective of one embodiment of the present disclosure; Figure 3 This is a partial structural cross-sectional view of the feed frame, baffle and filter assembly in one embodiment of the present disclosure; Figure 4 This is a schematic diagram of a partial cross-sectional view of the filter screen plate in the state where the feed frame, baffle and filter assembly are removed from the feed frame in one embodiment of the present disclosure. Figure 5 This is an exploded view of the interaction of the filtering components in one embodiment of this disclosure; Figure 6 This is a partial structural cross-sectional view of the feed frame in one embodiment of this disclosure.

[0015] In the diagram: 1. Film blowing machine body; 2. Workbench; 3. Heating and stirring chamber; 4. Hopper; 5. Feed frame; 6. Feed inlet; 7. Baffle; 8. Negative pressure fan; 9. Discharge pipe; 10. Storage box; 11. Feed pipe; 12. Mounting frame; 13. Slide; 14. Filter screen; 15. Insert plate; 16. Slot; 17. Vertical plate; 18. Through groove; 19. Horizontal plate; 20. Electric cylinder; 21. Mounting bracket; 22. Rubber sealing gasket; 23. Support frame. Detailed Implementation

[0016] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0017] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-6 As shown, it illustrates a dustproof blown film machine for plastic bag production according to an embodiment of the present disclosure, which solves the technical problem in the prior art that plastic particles (raw materials) are easily poured into the hopper 4 and dust is easily generated and scattered during the processing, which is difficult to handle.

[0023] According to one aspect, at least one embodiment of the present disclosure provides a dustproof blown film machine for plastic bag production, including a blown film machine body 1, the blown film machine body 1 including a workbench 2, a heating and stirring chamber 3 provided on the workbench 2, a screw rotatably provided in the heating and stirring chamber 3 for heating and stirring plastic raw materials, a hopper 4 connected to the heating and stirring chamber 3, and also including a feeding frame 5, a baffle 7, a dust collection component, a filter component and a drive mechanism; like Figure 3 As shown, the side wall of the feeding frame 5 has a feeding port 6. One end of the feeding frame 5 is connected to one end of the feeding port 6, and the other end of the feeding frame 5 is in a "blocked" state. A baffle 7 is hinged at the feeding port 6 to seal the feeding frame 5. A sealing layer is fitted on the baffle 7. By rotating the baffle 7, the packaging bag containing plastic raw materials is cut open, and the plastic raw materials are gently poured into the feeding frame 5 through the feeding port 6. Then the baffle 7 is closed. It should be added that when the raw materials are poured in, some dust may be generated and escape to the outside through the feed port 6. However, due to the ease of operation by the staff, the amount of dust generated is small, and the dust removal equipment in the production workshop can remove this small amount of dust. In addition, the staff wear masks, which can reduce the harm of dust. Moreover, the main source of plastic raw material is generated when the raw materials are stirred by the screw, so it is necessary to pay special attention to dust prevention in the future. like Figure 2As shown, the dust collection assembly is installed on the workbench 2 and is used in conjunction with the baffle 7 to suck out the dust generated in the feed frame 5. The dust collection assembly includes a negative pressure fan 8, a discharge pipe 9, and a storage tank 10. The negative pressure fan 8 is installed on the workbench 2. One end of the discharge pipe 9 is connected to the top of the feed frame 5, and the other end is connected to the input end of the negative pressure fan 8. In order to stably fix the discharge pipe 9, both the feed frame 5 and the workbench 2 are equipped with support frames 23, which are used to support and fix the discharge pipe 9. One end of the storage bin 10 is connected to the output end of the negative pressure fan 8 through the feed pipe 11. The storage bin 10 is provided with an air outlet, and a filter screen is detachably installed at the air outlet for the circulation of air inside the storage bin 10 and for filtering dust. By starting the negative pressure fan 8, the negative pressure fan 8 operates to create a local negative pressure environment. The dust and air in the feed frame 5 are drawn away by the air pressure difference and transferred to the storage bin 10 through the discharge pipe 9, the negative pressure fan 8, and the feed pipe 11. It should be added that the plastic raw materials need to be pre-treated to keep them dry, non-sticky and of moderate particle size so that they can pass through the negative pressure fan with the airflow. In addition, the negative pressure fan 8 has strong anti-clogging ability, the impeller of the negative pressure fan 8 has a large gap between it and the casing, and the airflow path in the fan is smoother, which can reduce the direct scouring of the blades by dust and make it difficult to cause blockage of the negative pressure fan 8. like Figure 3 , Figure 4 and Figure 5As shown, two filter components are slidably arranged inside the feed frame 5. The feed inlet 6 is located between the two filter components to prevent the raw material from being sucked out by the dust collection component and to filter impurities in the raw material. The filter components include a mounting frame 12, a filter screen 14, and a snap-fit ​​component. The feed frame 5 has a sliding groove 13 that mates with the mounting frame 12. The mounting frame 12 slides against the inner wall of the sliding groove 13. To prevent dust in the feed frame 5 from being moved out through the through groove 18 and to maintain the sealing of the feed frame 5, a filter screen 14 is fitted on the mounting frame 12. The inner walls of the rubber sealing gasket 22, the sliding groove 13, and the through groove 18 are all in contact with the rubber sealing gasket 22. The filter screen plate 14 slides in fit with the inner wall of the mounting frame 12. The two filter screen plates 14 are respectively located above and below the feed inlet 6. The snap-fit ​​component is provided on the filter screen plate 14 and the mounting frame 12 to fix the filter screen plate 14. The snap-fit ​​component includes an insert plate 15 and a slot 16. The insert plate 15 is fixedly connected to both ends of the filter screen plate 14. Two slots 16 are opened on the mounting frame 12. The insert plate 15 and the slot 16 are connected to each other. The inner wall of the 6 slides together to allow the mounting frame 12 to be inserted into the slide groove 13 and fixed. This also allows the insert plate 15 to be fixed in place by the cooperation of the slide groove 13 and the slot 16. The slide groove 13 is U-shaped, and one end of the insert plate 15 abuts against and slides against the inner top wall of the slide groove 13. By placing the two filter screens 14 in the two mounting frames 12 respectively, and inserting the two insert plates 15 into the two slots 16 respectively, the lateral stability of the filter screens 14 can be maintained. The insert plate 15 is secured by the slide groove. The "clamping" of 13 and slot 16 can fix the filter screen 14 inside the mounting frame 12. This can filter out impurities mixed in the plastic raw material when it is poured in. When the negative pressure fan 8 is working, it prevents the raw material and impurities from being sucked out of the feed frame 5 through the discharge pipe 9. It also sucks out the air and some dust in the feed frame 5. When the blown film machine is working, the dust generated in the heating and stirring chamber 3 is driven by the negative pressure fan 8 to move out of the feed frame 5 through the discharge pipe 9, thus preventing the dust from escaping from the feed frame 5. The drive mechanism is set on the workbench 2 and is used to move the two filter components out of the feed frame 5. It can simultaneously drive the two mounting frames 12 out of the feed frame 5, which facilitates the replacement of the filter screen 14. The drive mechanism includes a vertical plate 17, a horizontal plate 19 and an electric cylinder 20. The feed frame 5 has two through slots 18 that cooperate with the mounting frames 12. One end of each of the two mounting frames 12 is fixedly connected to one end of the vertical plate 17. There are two vertical plates 17. The side walls of the two vertical plates 17 are fixedly connected to both ends of the horizontal plate 19. The electric cylinder 20 is mounted on one side of the feed frame 5 through the mounting bracket 21. The output end of the electric cylinder 20 is fixedly connected to the horizontal plate 19. By starting the electric cylinder 20, the output end of the electric cylinder 20 drives the horizontal plate 19 away from the feed frame 5. The horizontal plate 19 drives the two vertical plates 17 to move. The two vertical plates 17 drive the two mounting frames 12 to move. The mounting frames 12 drive the filter screen 14 out of the feed frame 5, which facilitates the replacement of the filter screen 14. Working principle: When the dustproof blown film machine for plastic bag production removes dust during the production process, two filter screens 14 are placed in two mounting frames 12, and two insert plates 15 are inserted into two slots 16. This keeps the filter screens 14 horizontally stable. When the electric cylinder 20 is started, the output end of the electric cylinder 20 moves the horizontal plate 19 closer to the feed frame 5. The horizontal plate 19 moves the two vertical plates 17, and the two vertical plates 17 move the two mounting frames 12. The mounting frames 12 move the filter screens 14 into the feed frame 5. The insert plates 15 are "clamped" by the sliding grooves 13 and slots 16, which can fix the filter screens 14 in the mounting frame 12 and facilitate the replacement of the filter screens 14. By rotating the baffle 7, an opening is cut in the packaging bag containing the plastic raw material, and the plastic raw material is gently poured into the feeding frame 5 through the feed inlet 6. The baffle 7 is then rotated in the opposite direction to "close" the feed inlet 6, and the negative pressure fan 8 is started. The negative pressure fan 8 creates a local negative pressure environment, using the air pressure difference to extract the dust and air in the feeding frame 5, and transfer them to the storage box 10 through the discharge pipe 9, the negative pressure fan 8, and the feed pipe 11. This can filter out impurities mixed in with the raw material, and when the negative pressure fan 8 is working, it prevents the raw material and impurities from being sucked out of the feeding frame 5 through the discharge pipe 9, and sucks out the air and some dust in the feeding frame 5. Then the baffle 7 is closed. When the blown film machine is working, the dust generated in the heating and stirring chamber 3 is driven by the negative pressure fan 8 and moved out of the feeding frame 5 through the discharge pipe 9, preventing the dust from escaping in the feeding frame 5.

[0024] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A dustproof blown film machine for producing plastic bags, comprising a blown film machine body (1), wherein the blown film machine body (1) includes a worktable (2), a heating and stirring chamber (3) is provided on the worktable (2), and a hopper (4) is connected to the heating and stirring chamber (3), characterized in that, Also includes: Feed frame (5), the side wall of the feed frame (5) is provided with a feed port (6), one end of the feed frame (5) is connected to one end of the feed port (6); Baffle (7), the baffle (7) is hinged at the feed inlet (6) to seal the feed frame (5); A dust collection assembly is provided on the workbench (2) and is used in conjunction with the baffle (7) to suck out the dust generated in the feed frame (5); The filter assembly has two filter assemblies slidably disposed in the feed frame (5), and the feed port (6) is located between the two filter assemblies to prevent the raw material from being sucked out by the dust collection assembly and to filter impurities in the raw material; A drive mechanism is provided on the workbench (2) for driving the two filter components to move out of the feed frame (5).

2. The dustproof blown film machine for plastic bag production according to claim 1, characterized in that, The dust collection assembly includes: Negative pressure fan (8), the negative pressure fan (8) is installed on the workbench (2); The discharge pipe (9) has one end connected to the top of the feed frame (5) and the other end connected to the input end of the negative pressure fan (8). Storage bin (10), one end of which is connected to the output end of the negative pressure fan (8) through the feed pipe (11).

3. The dustproof blown film machine for plastic bag production according to claim 2, characterized in that, The filtering component includes: The mounting frame (12) has a groove (13) on the feed frame (5) that matches the mounting frame (12), and the mounting frame (12) slides in cooperation with the inner wall of the groove (13). The filter screen (14) is slidably fitted with the inner wall of the mounting frame (12); A snap-fit ​​connector is provided on the filter screen (14) and the mounting frame (12) for fixing the filter screen (14).

4. The dustproof blown film machine for plastic bag production according to claim 3, characterized in that, The snap-fit ​​component includes: Insert plate (15), both ends of the filter screen plate (14) are fixedly connected to the insert plate (15); The mounting frame (12) has two slots (16), and the insert plate (15) slides in cooperation with the inner wall of the slot (16).

5. A dustproof blown film machine for plastic bag production according to claim 4, characterized in that, The drive mechanism includes: The vertical plate (17) has two through slots (18) on the feed frame (5) that cooperate with the mounting frame (12). One end of each of the two mounting frames (12) is fixedly connected to one end of the vertical plate (17). There are two vertical plates (17). The side walls of the horizontal plate (19) and the two vertical plates (17) are respectively fixedly connected to the two ends of the horizontal plate (19); An electric cylinder (20) is mounted on one side of the feed frame (5) via a mounting bracket (21), and the output end of the electric cylinder (20) is fixedly connected to the horizontal plate (19).

6. A dustproof blown film machine for plastic bag production according to claim 4, characterized in that, The groove (13) is U-shaped, and one end of the insert plate (15) abuts against and slides against the inner top wall of the groove (13).

7. A dustproof blown film machine for plastic bag production according to claim 5, characterized in that, A rubber sealing gasket (22) is fitted on the mounting frame (12), and the inner walls of the slide groove (13) and the through groove (18) are in contact with the rubber sealing gasket (22).

8. A dustproof blown film machine for plastic bag production according to claim 2, characterized in that, Both the feed frame (5) and the worktable (2) are equipped with support frames (23), which are used to support and fix the discharge pipe (9).

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