Film blowing line carbon dot impurity cleaning system

Abstract

The utility model relates to a film blowing line carbon dot impurity cleaning system in the technical field of plastic film blowing extrusion, which comprises an extruder and a main bin positioned above the extruder, and a bottom outlet of the main bin is correspondingly connected with a feed port of the extruder through a blanking pipe; the cleaning system further comprises a cleaning stock bin used for storing resin master batch, a window is arranged on the pipe wall of the discharging pipe, the pipe wall of the discharging pipe is communicated with a first inclined pipe and a second inclined pipe, and a first valve and a second valve are installed on the pipe bodies of the inner ends, close to the discharging pipe, of the first inclined pipe and the second inclined pipe respectively. The outer end of the first inclined pipe inclines upwards and is correspondingly communicated with a bottom outlet of the cleaning bin, the outer end of the second inclined pipe inclines downwards, and a material collecting groove is correspondingly formed below an outer end opening of the second inclined pipe. According to the cleaning system, the cleaning efficiency can be improved while the waste of production storage materials is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic blown film extrusion, in particular to a carbon dot impurity cleaning system for a blown film line. Background Art

[0002] As is known, plastic blown film extrusion is a common plastic processing technology for producing various plastic film products. For example, in the existing PVDC blown film process, after the equipment runs for about 15 days, a large amount of carbonized impurities will inevitably appear on the barrel wall of the extruder. When running continuously under this condition, a large number of carbon dots will appear on the produced PVDC film, resulting in unqualified products. It is necessary to disassemble the machine to clean the carbonized impurities in the barrel of the extruder to produce qualified products. This leads to a reduction in the running time of the blown film line, a decrease in the film production rate, a waste of a large amount of manpower and material resources, and a large amount of time is consumed for each disassembly and assembly of the machine, which virtually increases the product cost.

[0003] The Chinese invention patent with the publication number CN102431141B discloses a cleaning method for the extruder and die head of a multi-layer co-extrusion blown film device, specifically starting the cleaning by adding new materials into the hopper until the new materials completely clean out the retained materials of the previous batch of formulations from the extruder and die head. Although the method idea of cleaning the retained materials has been disclosed, if only replacing the materials in the normal production mode, there are still problems of low cleaning efficiency and waste of stored materials, and no special device for cleaning carbon dot impurities has been found in the existing technology. Summary of the Utility Model

[0004] In order to overcome the deficiencies in the background art and solve the existing technical problems, the utility model discloses a carbon dot impurity cleaning system for a blown film line, which can reduce the waste of production stored materials and improve the cleaning efficiency at the same time.

[0005] To achieve the above invention purpose, the utility model adopts the following technical scheme:

[0006] A carbon dot impurity cleaning system for a blown film line includes an extruder and a main hopper located above the extruder. The bottom outlet of the main hopper is correspondingly connected to the feed inlet of the extruder through a feeding pipe. The cleaning system further includes a cleaning hopper for storing resin masterbatch. A viewing window is provided on the pipe wall of the feeding pipe, and a first inclined pipe and a second inclined pipe are respectively communicated with the pipe wall of the feeding pipe. A first valve and a second valve are respectively installed on the inner ends of the first inclined pipe and the second inclined pipe close to the feeding pipe. The outer end of the first inclined pipe is inclined upward and correspondingly communicated with the bottom outlet of the cleaning hopper. The outer end of the second inclined pipe is inclined downward, and a receiving trough is correspondingly arranged below the outer port of the second inclined pipe.

[0007] Furthermore, a mechanical stirring mechanism is installed in the cleaning hopper.

[0008] Further, the resin masterbatch is made of PE pellet material.

[0009] Further, the first inclined pipe and the second inclined pipe are respectively located on two opposite pipe walls of the blanking pipe, and the inner port of the first inclined pipe is higher than the inner port of the second inclined pipe.

[0010] Further, the first valve and the second valve are butterfly valves or globe valves.

[0011] Further, the cleaning system further includes a vacuum suction device. The feed port of the vacuum suction device is connected with a suction hose. The lower end of the suction hose extends into the material receiving tank. The discharge port of the vacuum suction device is connected with two discharge hoses both provided with on-off valves. The two discharge hoses are respectively in corresponding communication with the main material bin and the cleaning material bin.

[0012] Further, a compensator is connected between the bottom outlet of the main material bin and the blanking pipe.

[0013] Due to the adoption of the above technical solutions, the utility model has the following beneficial effects:

[0014] For the carbon dot impurity cleaning system of the blown film line disclosed by the utility model, when it is found that the extruded film has the defect of carbon dot impurities and cannot be adjusted, the extruder can be stopped from feeding first, the second valve can be opened to discharge the extruded material in the main material bin, then the second valve can be closed, the first valve can be opened to put in the cleaning material, and at the same time, the extruder can be started, and the carbon dot impurities remaining in the extruder can be carried out by the cleaning material until it is cleaned; it can not only release a large amount of materials remaining in the main material bin when problems are found to prevent continuous extrusion waste, but also set up a cleaning material bin for standby, and stop production in time for cleaning when needed, greatly improving the efficiency. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0016] Figure 2 is a schematic diagram of another embodiment structure of the utility model.

[0017] In the figure: 1, main material bin; 2, compensator; 3, window; 4, second valve; 5, second inclined pipe; 6, material receiving tank; 7, cleaning material bin; 8, first inclined pipe; 9, first valve; 10, blanking pipe; 11, extruder; 12, suction hose; 13, vacuum suction device. Detailed Embodiments

[0018] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction: Embodiment 1:

[0019] Combined with Figure 1 The carbon point impurity cleaning system of the film blowing line comprises an extruder 11 and a main silo 1 located above the extruder 11, and the bottom outlet of the main silo 1 is correspondingly connected to the feed port of the extruder 11 through a feed pipe 10; as needed, a compensator 2 is connected between the bottom outlet of the main silo 1 and the feed pipe 10 to facilitate installation and heat compensation;

[0020] The cleaning system also includes a cleaning silo 7 for storing resin masterbatch. The resin masterbatch can be set as PE granular material, which is conducive to removing carbonized impurities during extrusion. Of course, the original production materials can also be mixed with PPA functional masterbatch in advance to improve product performance and output and reduce material accumulation. In addition, a mechanical stirring mechanism is installed in the cleaning silo 7 to facilitate the discharge of granular materials from the cleaning silo 7 to prevent internal blockage and adhesion. The wall of the discharge pipe 10 is provided with a window 3 for convenient observation of the material level. The wall of the discharge pipe 10 is connected with a first inclined pipe 8 and a second inclined pipe 5 respectively. The first inclined pipe 8 and the second inclined pipe 5 are respectively installed with a first valve 9 and a second valve 4 near the inner end of the discharge pipe 10. The first valve 9 and the second valve 4 can be set as a butterfly valve or a stop valve. The outer end of the first inclined pipe 8 is inclined upward and connected to the bottom outlet of the cleaning silo 7. The outer end of the second inclined pipe 5 is inclined downward, and a receiving trough 6 is provided below the outer port of the second inclined pipe 5. The receiving trough 6 is used to collect stored materials for return and reuse.

[0021] As needed, the first inclined tube 8 and the second inclined tube 5 are respectively located on the two opposite tube walls of the feeding tube 10, and the inner port of the first inclined tube 8 is higher than the inner port of the second inclined tube 5. When the lower part of the feeding tube 10 is filled with material, the cleaning material flowing out of the first inclined tube 8 can directly flow away from the second inclined tube 5, so that there will be no material accumulation.

[0022] When implementing the carbon dot impurity cleaning system of the blown film line of the present utility model, when it is found that the extruded film has the defect of carbon dot impurities and cannot be adjusted, the feeding of the extruder 11 can be stopped first, the second valve 4 is opened to discharge the extruded material in the main material bin 1 into the receiving tank 6, then the second valve 4 is closed, the first valve 9 is opened to put in the cleaning material, and at the same time, the extruder 11 is started. The carbon dot impurities remaining in the extruder 11 are carried out by the cleaning material until it is cleaned; in order to facilitate the closing of the first valve 9, or in order not to store the cleaning material in the cleaning material bin 7 for a long time, the cleaning material can be drained through the first inclined pipe 8 and the second inclined pipe 5, and then the first valve 9 and the second valve 4 are closed. Because if the first valve 9 is directly closed when there is material in the first inclined pipe 8, it may not be closed tightly due to material jamming. Embodiment 2:

[0023] As shown in the Figure 2 accompanying drawings, on the basis of Embodiment 1, the cleaning system further includes a vacuum feeding device 13. The feeding port of the vacuum feeding device 13 is connected with a feeding hose 12. The lower end of the feeding hose 12 extends into the receiving tank 6. The discharging port of the vacuum feeding device 13 is connected with two discharging hoses both equipped with on-off valves. The two discharging hoses are respectively communicated with the main material bin 1 and the cleaning material bin 7 correspondingly. Whether it is the production material collected in the receiving tank 6 or the cleaning material, it can be sucked by the vacuum feeding device 13 and then returned to the main material bin 1 and the cleaning material bin 7 respectively for reuse.

[0024] The parts not detailed in the present utility model are prior art. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model; therefore, from any point of view, the above embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model, and any reference signs in the claims should not be regarded as limiting the content of the claimed rights involved.

Claims

1. A carbon dot impurity cleaning system for a blown film line, comprising an extruder (11) and a main material bin (1) located above the extruder (11). The bottom outlet of the main material bin (1) is correspondingly connected to the feed inlet of the extruder (11) through a feeding pipe (10), and it is characterized in that: The cleaning system further includes a cleaning material bin (7) for storing resin masterbatch. A viewing window (3) is provided on the pipe wall of the blanking pipe (10). The pipe wall of the blanking pipe (10) is respectively communicated with a first inclined pipe (8) and a second inclined pipe (5). A first valve (9) and a second valve (4) are respectively installed on the inner ends of the first inclined pipe (8) and the second inclined pipe (5) close to the blanking pipe (10). The outer end of the first inclined pipe (8) is inclined upward and correspondingly communicated with the bottom outlet of the cleaning material bin (7). The outer end of the second inclined pipe (5) is inclined downward, and a material receiving groove (6) is correspondingly provided below the outer port of the second inclined pipe (5).

2. The carbon dot impurity cleaning system for a blown film line according to claim 1, wherein: A mechanical stirring mechanism is installed in the cleaning material bin (7).

3. The carbon dot impurity cleaning system for a blown film line according to claim 1, characterized in that: The resin masterbatch is made of PE particle material.

4. The carbon dot impurity cleaning system for a blown film line according to claim 1, wherein: The first inclined pipe (8) and the second inclined pipe (5) are respectively located on the opposite two pipe walls of the blanking pipe (10), and the inner port of the first inclined pipe (8) is higher than the inner port of the second inclined pipe (5).

5. The carbon dot impurity cleaning system for a blown film line according to claim 1, characterized in that: The first valve (9) and the second valve (4) are butterfly valves or globe valves.

6. The carbon dot impurity cleaning system for a blown film line according to claim 1, wherein: The cleaning system further includes a vacuum feeding device (13). The feeding port of the vacuum feeding device (13) is connected with a feeding hose (12). The lower end of the feeding hose (12) extends into the material receiving groove (6). The discharging port of the vacuum feeding device (13) is connected with two discharging hoses both with on-off valves, and the two discharging hoses are respectively correspondingly communicated with the main material bin (1) and the cleaning material bin (7).

7. The carbon dot impurity cleaning system for a blown film line according to claim 1, characterized in that: A compensator (2) is connected between the bottom outlet of the main material bin (1) and the blanking pipe (10).

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