A plastic film edge conveying mechanism

Abstract

This utility model discloses a plastic film edge material conveying mechanism, including a waste bin, a feed cylinder located at the top of the waste bin, a three-way valve located at the bottom of the feed cylinder, and a discharge pipe located at the side port of the three-way valve. A suction device is provided inside the waste bin, through which the crushed edge material particles in the waste bin are drawn upwards into the discharge pipe. This solves the problem that edge material particles in the waste bin cannot be directly recycled, resulting in a smaller waste ratio and easier cleaning of the waste material in the waste bin.

Description

Technical Field

[0001] This utility model relates to the technical field of blown film machines, and specifically to a plastic film edge conveying mechanism. Background Technology

[0002] Currently, blown film machines generate some scrap material during the production of plastic film. This scrap material, after being crushed, can be reused in plastic film production. However, this scrap material cannot be directly used for plastic film production in the early stages of equipment startup because the scrap particles entering the blown film machine first can easily cause internal blockages. Therefore, a scrap material conveying mechanism is installed between the crusher and the blown film machine. Its feed cylinder is connected to the outlet of the scrap crusher via a pipe, and its outlet is connected to the feed inlet of the blown film machine via a pipe. The feed cylinder has a conical structure with a three-way valve at the bottom. The entire feed cylinder is installed on top of the waste bin. Figure 2 As shown, after the blown film machine starts, the entire system starts simultaneously. When the blown film machine is preparing new raw materials, the crusher starts simultaneously to crush the edge material. After crushing, the edge material enters the feed cylinder for buffering and is conveyed forward. In the first 1-2 minutes, the waste material is released through the bottom opening of the three-way valve, allowing the edge material particles to float in the waste bin, thus preventing the edge material particles from directly entering the blown film machine. After the initial time, the blown film machine is running normally. At this time, the valve is switched to allow the edge material particles in the feed cylinder to be conveyed back to the blown film machine through the discharge pipe for mixing and film making, while the particles floating in the waste bin will settle at the bottom of the bin.

[0003] However, the current equipment has a problem during the conveying process via the edge material conveying mechanism: the edge material particles that enter the waste bin after being crushed in the first few minutes are not designed for direct reuse. Therefore, after a period of use, the bin door is opened and the material is removed. Once the bin door is opened, this waste material is easily scattered throughout the room and is also easily contaminated by contact with the outdoor ground. As a result, a large portion of this material cannot be reused and is currently treated as waste. The more frequently the equipment starts and stops, the more waste is generated, leading to increased costs and complicated handling. To reduce costs, the existing edge material conveying mechanism needs to be improved so that the particles originally designed for waste disposal in the waste bin can be reused, thereby reducing production costs. Summary of the Invention

[0004] In order to solve one or more technical problems existing in the prior art, the purpose of this application is to provide a plastic film edge material conveying mechanism, which can solve the problem that edge material particles in the waste bin cannot be directly recycled, reduce the proportion of waste, and make it more convenient to clean up the waste in the waste bin.

[0005] To solve the aforementioned technical problems, this application adopts the following technical solution: A plastic film edge material conveying mechanism includes a waste bin, a feed cylinder located at the top of the waste bin, a three-way valve located at the bottom of the feed cylinder, and a discharge pipe located at the side port of the three-way valve. The waste bin is equipped with a suction device, and the edge material crushed particles in the waste bin are drawn upward into the discharge pipe through the suction device.

[0006] Preferably, the suction device includes an interface pipe located on one side of the outlet pipe interface end and a flexible tube with one end located on the interface pipe.

[0007] Preferably, the interface pipe is equipped with a manual valve.

[0008] Preferably, the interface tube is made of stainless steel and one end is welded to the discharge tube.

[0009] Preferably, the length of the hose is greater than the height from the discharge pipe to the waste bin.

[0010] Preferably, the hose is a plastic corrugated pipe.

[0011] Preferably, the diameter of the hose is 50-60 mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: A suction device was added to the existing plastic film edge material conveying mechanism. The suction device can re-transport the material that was discharged into the waste bin as waste material in the early stage to the discharge pipe for blown film forming. This will not affect the blockage caused by edge material particles in the early stage of blown film machine startup. This not only improves the utilization rate of materials, but also reduces the frequency of manual cleaning of materials in the waste bin, effectively reducing production costs and cleaning difficulty. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the existing equipment's process flow. In the diagram: 1. Material conveying mechanism; 11. Waste bin; 12. Feed cylinder; 13. Three-way valve; 14. Discharge pipe; 2. Crusher; 3. Blown film machine; 4. Suction device; 41. Interface pipe; 42. Manual valve; 43. Hose. Detailed Implementation

[0014] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0015] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0016] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0017] like Figure 1 As shown, a plastic film edge material conveying mechanism includes a waste bin 11, a feed cylinder 12 located at the top of the waste bin 11, a three-way valve 13 located at the bottom of the feed cylinder 12, and a discharge pipe 14 located at the side port of the three-way valve 13. The waste bin 11 is equipped with a suction device 4, and the edge material crushed particles in the waste bin 11 are drawn upward into the discharge pipe 14 by the suction device 4.

[0018] In actual production, the edge material cut off during film production is fed into the crusher 2 for crushing. The crushed material is then conveyed through the fan at the outlet of the crusher 2 along the pipe to the interface at the top of the feed cylinder 12. The material will float in the feed cylinder 12. In order to ensure airflow, part of the airflow needs to be opened through the three-way valve 13 at the bottom to allow the airflow to flow downward. At this time, since the blown film machine 3 has just started, the crushed material cannot directly enter the blown film machine 3. Therefore, after the valve is switched, the gas is discharged outward from the vertically downward port at the bottom of the feed cylinder 12, and part of the material enters the waste bin 11 along with the gas. After the blown film machine 3 blows film normally, the valve is automatically switched again so that the material in the feed cylinder 12 can be guided through the three-way valve 13 and enter the discharge pipe 14. It is then transported to the blown film machine 3 through the pipe at the outer end of the discharge pipe 14 as raw material. The material that was in the waste bin 11 in the early stage can be washed into the discharge pipe 14 by the suction device 4 for blown film forming. Since the waste bin 11 is empty, and the waste material blown in initially is relatively light and mostly floats, the total amount of particles that can be extracted by the suction device 4 is negligible. This will not affect the blockage caused by the mixing of edge material particles in the blown film machine 3 during the initial startup. After the valve is switched, the floating particles will gradually settle to the bottom of the bin. At this time, the settled particles will be sucked out again, which not only improves the utilization rate of materials but also reduces the frequency of manual cleaning of the waste bin 11. During cleaning, there will be no large accumulation, and cleaning can be achieved quickly. This effectively reduces production costs and the difficulty of cleaning.

[0019] A further improvement is that the suction device 4 includes an interface pipe 41 located on one side of the outlet pipe 14 and a flexible hose 43 with one end located on the interface pipe 41; the length of the flexible hose 43 is greater than the height from the outlet pipe 14 to the waste bin 11.

[0020] The suction device 4 consists of an interface pipe 41 and a hose 43 installed on the discharge pipe 14. The length of the hose 43 is greater than the height from the discharge pipe 14 to the waste bin 11. Since the discharge pipe 14 itself has a suction force to convey the film blowing machine 3 during operation, the interface pipe 41 can automatically form a negative pressure state for the entire suction device 4. This means that when the material in the waste bin 11 is reused, there is no need to install a power system, resulting in lower production and improvement costs. Moreover, the length of the hose 43 is greater than the height from the discharge pipe 14 to the waste bin 11, which allows the bottom of the hose 43 to effectively suck out the material from the bottom of the waste bin 11, preventing the material from accumulating on a large area at the bottom of the waste bin.

[0021] A further improvement is that a manual valve 42 is provided on the interface pipe 41, and the interface pipe 41 is made of stainless steel and one end is welded to the discharge pipe 14.

[0022] When the waste bin 11 needs to be cleaned, if the equipment is running, for example, during batch change or when there is a problem with the edge material conveying end and all particles need to be discharged into the waste bin 11, the manual valve 42 can be closed directly at the bin door. This allows the edge material particles to be cut off and discharged outwards through the waste bin 11, preventing them from continuing to be conveyed into the blown film machine 3. The interface pipe 41 is made of stainless steel and one end is welded to the discharge pipe 14, which is low in cost, easy to operate, and has high stability after installation.

[0023] A further improvement is made in that the hose 43 is a plastic corrugated pipe; the diameter of the hose 43 is 50~60mm.

[0024] The flexible hose 43 is a plastic corrugated hose with a diameter of 50~60mm. Its length is easy to control, and its modification and maintenance costs are low. At the same time, it can ensure the normal adsorption of materials and will not easily cause blockage.

[0025] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A plastic film edge conveying mechanism, comprising a waste bin (11), a feed cylinder (12) disposed at the top of the waste bin (11), a three-way valve (13) disposed at the bottom of the feed cylinder (12), and a discharge pipe (14) disposed at the side port of the three-way valve (13), characterized in that: The waste bin (11) is equipped with a suction device (4), and the edge crushed particles in the waste bin (11) are drawn upward into the discharge pipe (14) by the suction device (4).

2. A plastic film scrap conveying mechanism according to claim 1, characterized in that: The suction device (4) includes an interface pipe (41) located on one side of the outlet pipe (14) and a flexible tube (43) with one end located on the interface pipe (41).

3. A plastic film scrap conveying mechanism (1) according to claim 2, characterized in that: A manual valve (42) is provided on the interface pipe (41).

4. A plastic film edge material conveying mechanism (1) according to claim 2, characterized in that: The interface pipe (41) is made of stainless steel and one end is welded to the discharge pipe (14).

5. A plastic film scrap conveying mechanism (1) according to claim 2, characterized in that: The length of the hose (43) is greater than the height from the discharge pipe (14) to the waste bin (11).

6. A plastic film edge material conveying mechanism (1) according to claim 2, characterized in that: The hose (43) is a plastic corrugated pipe.

7. A plastic film edge material conveying mechanism (1) according to claim 2, characterized in that: The diameter of the hose (43) is 50~60mm.

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