Filtering and forming device for antistatic plastic packaging bag extruder

Abstract

The utility model discloses a filtering and forming device for an antistatic plastic packaging bag extruder, which belongs to the technical field of plastic packaging bag processing equipment and comprises an extruder and a film blowing machine, an extrusion end is mounted at the rear end of the extruder, a film blowing end is mounted at the lower end of the film blowing machine, and the extrusion end is connected with the film blowing end. The extrusion end and the film blowing end are communicated with a filtering and forming device through a feeding pipe and a discharging pipe respectively, the filtering and forming device comprises a filtering barrel and a forming pipeline, a filtering roller is rotationally connected to the interior of the filtering barrel, the periphery of the filtering roller is an annular metal surface, and circular filter screens are mounted on the two side surfaces of the filtering roller. According to the filtering and forming device, on one hand, an antistatic mixture extruded by an extruder can be filtered to remove impurities which cannot be melted and decomposed, and on the other hand, the antistatic mixture can be discharged and formed, so that the mixture fits the shape and the position of an extrusion hole in advance, the risk that the extrusion hole is blocked is reduced, and the film blowing efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packaging bag processing equipment, and more specifically, to a filtering and forming device for an antistatic plastic packaging bag extruder. Background Technique

[0002] An additive antistatic agent is mixed with a thermoplastic resin in a certain proportion, and a variety of additives are added. After melting, mixing, and granulating, antistatic particles are obtained. The above-mentioned particles are mixed with plastic processing raw material particles and poured into the interior of an extruder. When using the antistatic particles to process an antistatic plastic packaging bag film, a three-layer (ABC) co-extrusion blow molding process is often adopted. Note that the proportion of the added antistatic particles should be determined according to the content of its active substances and adjusted appropriately based on the test results. Increasing the addition amount not only increases the product cost but also has an adverse impact on the subsequent processing procedures. After the obtained film (the composite surface is corona-treated) is dry-compounded with other substrates, an antistatic composite packaging material is obtained.

[0003] In the actual processing process, since the plastic processing raw material particles are made from recycled waste plastics, they inevitably contain a large amount of impurities inside. These impurities cannot be melted, and together with the impurities that cannot be decomposed in the antistatic agent, and the three-layer co-extrusion blow molding process has a total of six extrusion holes on the left and right, resulting in the extrusion holes being easily blocked, causing equipment damage. Secondly, the shape of the mixed material belt cooled after being led out from the melting section cannot completely fit the extrusion holes, which will also cause the extrusion holes to be blocked and affect the film blowing efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a filtering and forming device for an antistatic plastic packaging bag extruder. On the one hand, this filtering and forming device can filter the antistatic mixed material extruded by the extruder to remove the impurities that cannot be melted and decomposed. On the other hand, it can perform the discharging and forming operation on the antistatic mixed material, enabling the mixed material to fit the shape and position of the extrusion holes in advance, reducing the risk of the extrusion holes being blocked, and ensuring the film blowing efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A filtering and forming device for an antistatic plastic packaging bag extruder comprises an extruder and a film blowing machine, wherein an extrusion end is installed at the rear end of the extruder, and a film blowing end is installed at the lower end of the film blowing machine, and a filtering and forming device is connected between the extrusion end and the film blowing end through a feed pipe and a discharge pipe respectively, and the filtering and forming device comprises a filter cylinder and a forming pipeline, a filter drum is rotatably connected inside the filter cylinder, the outer periphery of the filter drum is a circular metal surface and circular filter screens are installed on both sides, a transmission shaft passes through the center position of the filter drum, and the transmission shaft passes through the filter cylinder and is connected to the output shaft of a driving motor through a coupling, a clamping plate is installed at the lower end of the inner side surface of the filter cylinder, and a filter scraper is fixed on the outer side surface of one side of the clamping plate, a waste drop cylinder is installed at the gap position between the clamping plates, and the bottom of the waste drop cylinder extends into the waste trough.

[0007] As a further optimization of this solution, the discharge pipe is connected to a forming pipe, and the forming pipe includes a three-way forming pipe and two four-way forming pipes. One end of the three-way forming pipe is connected to the discharge pipe, and the other two ends of the three-way forming pipe have the same size and are symmetrically arranged on the left and right and are respectively connected to one end of the four-way forming pipe on one side. The other three ends of the four-way forming pipe have the same size as the extrusion hole of the film blowing machine and are vertically staggered. The other three ends of the four-way forming pipe are connected to the six feeding points on both sides of the film blowing end through flanges.

[0008] As a further optimization of this solution, a bracket assembly and a sealing assembly are also provided inside the filter cylinder, the filter scraper is attached to the outer side surfaces of the filter screens on both sides, and the waste drop cylinder is positioned at the intersection of the filter scraper and the filter screen on both sides.

[0009] As a further optimization of this solution, the discharge pipe is connected to the center position of the filter drum, and the feed pipe is connected to the outer side position of the filter screen.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model provides a filtering and molding device between the extruder and the film blowing machine. On the one hand, the antistatic mixed material extruded by the extruder is filtered through the filter drum and other components inside the filter cylinder body. The qualified mixed material flows out from the discharge pipe to the rear molding pipe. The impurities larger than the filter screen are scraped off by the filter scraper and enter the waste tank through the waste drop cylinder for collection and treatment, thereby removing the impurities that cannot be melted and decomposed. On the other hand, the qualified mixed material is first divided into two and then divided into three parts by a three-way molding tube and two four-way molding tubes, and the molding operation is realized corresponding to the size and position of the extrusion hole of the film blowing machine, so that the mixed material fits the shape and position of the extrusion hole in advance, the feeding fluency is improved, the risk of the extrusion hole being blocked is reduced, and the film blowing efficiency is guaranteed. Description of the Drawings

[0012] Figure 1 This is a schematic diagram of the installation structure of the filtration and forming device of the present utility model (removing part of the outer shell of the filtration cylinder and components);

[0013] Figure 2 This is a top view of the filtration and forming device of the present utility model (removing part of the outer shell of the filtration cylinder and components);

[0014] Figure 3 This is a schematic diagram of the structure of the filtration drum of the present utility model (removing part of the outer shell of the filtration cylinder and components);

[0015] Figure 4 This is a schematic diagram of the structure of the forming pipeline of the present utility model;

[0016] In the figure: 1. Extruder; 2. Extrusion end; 3. Blown film machine; 4. Blown film end; 5. Filtration cylinder; 6. Driving motor; 7. Transmission shaft; 8. Feed pipe; 9. Discharge pipe; 10. Filtration drum; 11. Waste slot; 12. Filtration scraper; 13. Clamp; 14. Waste falling cylinder; 15. Three-way forming pipe; 16. Four-way forming pipe. Detailed Description of the Preferred Embodiments

[0017] In order to make the technical means, creative features, achieved purposes and functions of the utility model easy to understand, the present utility model will be further described below with reference to specific drawings.

[0018] In order to solve the problem that impurities exist in the existing antistatic mixture and easily block the six material extrusion holes of the blown film end, as Figure 1 shown, this application includes an extruder 1 and a blown film machine 3. An extrusion end 2 is installed at the rear end of the extruder 1, and a blown film end 4 is installed at the lower end of the blown film machine 3;

[0019] As Figure 2 shown, a filtration and forming device is respectively connected between the extrusion end 2 and the blown film end 4 through a feed pipe 8 and a discharge pipe 9. The filtration and forming device includes a filtration cylinder 5 and a forming pipeline. A filtration drum 10 is rotatably connected inside the filtration cylinder 5. The periphery of the filtration drum 10 is a circular metal surface, and circular filter meshes are installed on both side surfaces. A transmission shaft 7 passes through the center position of the filtration drum 10, and the transmission shaft 7 passes out of the filtration cylinder 5 and is externally connected to the output shaft of the driving motor 6 through a coupling;

[0020] As Figure 3 shown, a clamp 13 is installed at the lower end of the inner side surface of the filtration cylinder 5, and a filtration scraper 12 is fixed on the outer side surface of one side of the clamp 13. A waste falling cylinder 14 is installed at the gap position between the clamps 13, and the lower end of the waste falling cylinder 14 extends into the waste slot 11.

[0021] As Figure 4As shown, the discharge pipe 9 is connected to a forming pipeline, which includes a three-way forming pipe 15 and two four-way forming pipes 16. One end of the three-way forming pipe 15 is communicated with the discharge pipe 9. The other two ends of the three-way forming pipe 15 have the same size and are symmetrically arranged left and right, and are respectively communicated with one end of the four-way forming pipe 16 on one side. The other three ends of the four-way forming pipe 16 have the same size as the material extrusion holes of the film blowing machine 3 and are vertically staggered. The other three ends of the four-way forming pipe 16 are respectively and correspondingly communicated with six feeding points on both sides of the film blowing end 4 through flange plates.

[0022] Specifically, through components such as the filter drum 10 inside the filter cylinder 5, the antistatic mixture extruded by the extruder 1 is filtered. The qualified mixture flows out from the discharge pipe 9 to the forming pipeline at the rear. Impurities larger than the filter screen will adhere to the surface of the filter screen and be scraped off by the filter scraper 12 as the filter drum 10 rotates. The impurities enter the waste material tank 11 through the waste material dropping cylinder 14 for collection and treatment, so as to remove the impurities in the mixture that cannot be melted and decomposed. On the other hand, through a three-way forming pipe 15 and two four-way forming pipes 16, the qualified mixture is first divided into two parts, and then divided into three parts and corresponds to the size of the material extrusion holes of the film blowing machine 3 and the positions of the six feeding points on both sides, realizing the forming operation, making the mixture fit the shape and position of the material extrusion holes in advance, improving the feeding smoothness, reducing the risk of blockage of the material extrusion holes, and ensuring the film blowing efficiency.

[0023] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0024] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A filtering and forming device for an antistatic plastic packaging bag extruder, comprising an extruder and a film blowing machine. An extrusion head is installed at the rear end of the extruder, and a film blowing head is installed at the lower end of the film blowing machine. It is characterized in that: The extrusion end and the film blowing end are connected to a filtering molding device through a feed pipe and a discharge pipe respectively, and the filtering molding device includes a filter cylinder and a molding pipe, a filter drum is rotatably connected inside the filter cylinder, the outer periphery of the filter drum is a circular metal surface and circular filter screens are installed on both sides, a transmission shaft passes through the center of the filter drum and the transmission shaft passes through the filter cylinder and is connected to the output shaft of the driving motor through a coupling, a splint is installed at the lower end of the inner side surface of the filter cylinder and a filter scraper is fixed on the outer side surface of one side of the splint, a waste drop cylinder is installed at the gap between the splints, and the bottom of the waste drop cylinder extends into the waste trough.

2. The filtering and forming device for an antistatic plastic packaging bag extruder according to claim 1, characterized in that: The discharge pipe is connected to a forming pipe, and the forming pipe includes a three-way forming pipe and two four-way forming pipes. One end of the three-way forming pipe is connected to the discharge pipe, and the other two ends of the three-way forming pipe have the same size and are symmetrically arranged on the left and right and are respectively connected to one end of the four-way forming pipe on one side. The other three ends of the four-way forming pipe have the same size as the extrusion hole of the film blowing machine and are vertically staggered. The other three ends of the four-way forming pipe are connected to the six feeding points on both sides of the film blowing end through flanges.

3. The filtering and forming device for an antistatic plastic packaging bag extruder according to claim 2, characterized in that: A support assembly and a sealing assembly are also provided inside the filter cylinder. The filter scraper is attached to the outer side surfaces of the filter screens on both sides. The waste drop cylinder is aligned with the intersection of the filter scraper and the filter screen on both sides.

4. The filtering and forming device for an antistatic plastic packaging bag extruder according to claim 3, characterized in that: The discharge pipe is connected to the center of the filter drum, and the feed pipe is connected to the outer side of the filter screen.

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