Automatic feeding and metering structure of a plastic processing film blowing machine

Abstract

This utility model discloses an automatic feeding and metering structure for a blown film machine in plastic processing, specifically relating to the technical field of plastic bag production equipment. It includes a heating cylinder, a fixed frame fixedly connected to the outside of the heating cylinder, a cover plate rotatably connected to the top of the heating cylinder, a heater installed inside the heating cylinder, a conveying pipe connected to the bottom of the heating cylinder, a second conveying pipe fixedly connected to one side of the first conveying pipe, an electrically controlled butterfly valve installed inside the second conveying pipe, a storage cylinder fixedly connected to one side of the second conveying pipe, and a servo motor fixedly connected to the top of the heating cylinder. This utility model improves the stirring frequency and initial melting and mixing effect of the plastic raw material during the heating process by using opposing stirring fans and the rotation of the turntable and inclined plate, thereby enhancing the feeding and subsequent processing efficiency of the blown film machine. The storage cylinder stores the initially heated raw material, enabling quantitative feeding and adjustment control of the blown film machine, improving the accuracy of feeding.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic bag production equipment, and more specifically, to an automatic feeding and metering structure for a blown film machine in plastic processing. Background Technology

[0002] A blown film machine works by feeding dried polyethylene particles into a hopper. The particles, by their own weight, enter the screw. When the particles contact the inclined plane of the screw, the rotating inclined plane generates a thrust perpendicular to the inclined plane, propelling the plastic particles forward. During this movement, friction occurs between the plastic and the screw, between the plastic and the barrel, and between the particles themselves, along with collisions and friction. Simultaneously, the plastic gradually melts due to external heating of the barrel. The molten plastic is filtered through the die head to remove impurities and exits through the die. After being cooled by the air ring, inflated, and passed through the herringbone plate and traction rollers, the finished film is wound into a roll.

[0003] Currently, the granules at the feed inlet of blown film machines are manually transported to the feeding hopper, which requires a lot of physical labor. In addition, there is a need for dedicated personnel to handle the feeding, which is a waste of manpower.

[0004] A search revealed a Chinese patent with publication number CN214000507U that discloses an automatic feeding device for a plastic bag blown film machine. This utility model has a simple structure and can achieve effective material feeding.

[0005] However, in actual use, the above-mentioned automatic feeding device directly feeds the raw materials into the blown film machine, which causes the melted raw materials in the blown film machine to mix with the unmelted raw materials. This can result in unmelted raw material particles existing as impurities in the film material, reducing the efficiency and yield of the blown film machine in processing plastics. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an automatic feeding and metering structure for a blown film machine in plastic processing, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatic feeding and metering structure for a blown film extrusion machine in plastic processing includes a heating cylinder. A fixing frame is fixedly connected to the outside of the heating cylinder, and a cover plate is rotatably connected to the top of the heating cylinder. A heater is installed inside the heating cylinder, and a conveying pipe is connected to the bottom of the heating cylinder. A second conveying pipe is fixedly connected to one side of the first conveying pipe, and an electrically controlled butterfly valve is installed inside the second conveying pipe. A storage cylinder is fixedly connected to one side of the second conveying pipe, and a servo motor is fixedly connected to the top of the heating cylinder. A pretreatment mechanism is provided inside the heating cylinder. The structure includes a rotating shaft, two stirring rods 1 fixedly connected to the outer side of the rotating shaft, multiple cleaning rods fixedly connected to the outer side of the stirring rods 1, a stirring fan 1 fixedly connected to the outer side of the rotating shaft, two stirring fans 2 fixedly connected to the bottom of the rotating shaft, a butterfly valve installed inside the conveying pipe 1, a servo motor 2 fixedly connected to one side of the conveying pipe 1, a turntable fixedly connected to the output end of the servo motor 2, multiple inclined plates fixedly connected to one side of the turntable, the inclined plates being arranged in a circular array on one side of the turntable; and a discharge metering mechanism provided inside the storage cylinder.

[0009] By adopting the above technical solution, the feeding, heating and discharging of raw materials are separated into two parts, making the raw material feeding process more convenient. A heater is used to heat the inside of the heating cylinder, so that the raw materials are mixed to a certain extent before feeding. Multiple cleaning rods are used to assist the discharge of the heated raw materials, preventing the raw materials from sticking to the inner wall of the heating cylinder and improving the efficiency of raw material heating and mixing. Then, a turntable and an inclined plate are used to assist the discharge of the heated raw materials, so that the raw materials are better output into the storage cylinder.

[0010] As a further description of the above technical solution: the discharge metering mechanism includes a servo motor three, the outer side of which is fixedly connected to the bottom of the storage cylinder, and two stirring rods two are fixedly connected to the output end of the servo motor three. A heater two is fixedly connected to the inner side of the storage cylinder, and an air pump is fixedly connected to the bottom of the storage cylinder. An air pipe is connected to the output end of the air pump. One end of the air pipe passes through the top of the storage cylinder and extends into the inside of the storage cylinder. A discharge pipe is connected to one side of the storage cylinder. An electrically controlled butterfly valve two is installed inside the discharge pipe. A liquid flow meter is installed at the top of the discharge pipe, and the detection end of the liquid flow meter extends into the inside of the discharge pipe.

[0011] By adopting the above technical solution: the melted raw materials are collected and stored in a storage tank, and the stored raw materials are heated, kept warm and stirred. When it is necessary to feed the blown film machine, the raw materials can be quantitatively added.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. By setting up a pretreatment mechanism, compared with the existing technology, the opposing arrangement of stirring fan one and stirring fan two increases the stirring frequency of plastic raw materials during heating. Furthermore, the rotation of the turntable and inclined plate allows the raw materials to undergo preliminary melting and mixing before feeding, thereby improving the efficiency of raw material heating and thus improving the efficiency of feeding the blown film machine and subsequent processing.

[0014] 2. By setting up a discharge metering mechanism, compared with the existing technology, the raw materials after preliminary heating are stored in a storage tank, so that the raw materials can be quantitatively fed to the blown film machine during the mixing process, and the feeding amount of the blown film machine can be adjusted and controlled. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the rear structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the right side of the present invention.

[0018] Figure 4 This is a partial schematic diagram of the connection between the heating cylinder and the rotating shaft of this utility model.

[0019] Figure 5 This is a partial schematic diagram of the connection between the clinker tube and the servo motor of this utility model.

[0020] Figure 6 This is a partial schematic diagram of the connection between the storage cylinder and the discharge pipe of this utility model.

[0021] The attached diagram is labeled as follows: 1. Heating cylinder; 2. Fixing frame; 3. Cover plate; 4. Feed pipe one; 5. Feed pipe two; 6. Storage cylinder; 7. Servo motor one; 8. Rotating shaft; 9. Stirring rod one; 10. Cleaning rod; 11. Stirring fan one; 12. Stirring fan two; 13. Butterfly valve; 14. Servo motor two; 15. Inclined plate; 16. Heater one; 17. Electrically controlled butterfly valve one; 18. Servo motor three; 19. Stirring rod two; 20. Heater two; 21. Air pump; 22. Air pipe; 23. Discharge pipe; 24. Electrically controlled butterfly valve two; 25. Liquid flow meter; 26. Turntable. Detailed Implementation

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

[0023] The embodiments disclosed in this application are as follows: Figure 1-6 The automatic feeding and metering structure of a blown film extrusion machine for plastic processing shown includes a heating cylinder 1, a fixed frame 2 fixedly connected to the outside of the heating cylinder 1, a cover plate 3 rotatably connected to the top of the heating cylinder 1, a heater 16 installed inside the heating cylinder 1, a conveying pipe 4 connected to the bottom of the heating cylinder 1, a second conveying pipe 5 fixedly connected to one side of the first conveying pipe 4, an electrically controlled butterfly valve 17 installed inside the second conveying pipe 5, a storage cylinder 6 fixedly connected to one side of the second conveying pipe 5, a servo motor 7 fixedly connected to the top of the heating cylinder 1, and a pre-treatment mechanism inside the heating cylinder 1. The pre-treatment mechanism includes a rotating shaft 8, two stirring rods 9 fixedly connected to the outside of the rotating shaft 8, multiple cleaning rods 10 fixedly connected to the outside of the stirring rods 9, a stirring fan 11 fixedly connected to the outside of the rotating shaft 8, two stirring fans 12 fixedly connected to the bottom of the rotating shaft 8, and a... A butterfly valve 13 is fixedly connected to a servo motor 14 on one side of the conveying pipe 4. A turntable 26 is fixedly connected to the output end of the servo motor 14. Multiple inclined plates 15 are fixedly connected to one side of the turntable 26, and the inclined plates 15 are arranged in a ring array on one side of the turntable 26. A discharge metering mechanism is set inside the storage cylinder 6. The servo motor 7 drives the rotating shaft 8 to drive the stirring rod 9, stirring fan 11, and stirring fan 12 to heat and mix the raw materials entering the heating cylinder 1. The raw materials inside the heating cylinder 1 are also heated by the heater 16. Then, the butterfly valve 13 is opened, and the servo motor 14 is started to drive the turntable 26 and multiple inclined plates 15 to assist in conveying the raw materials, so that the raw materials can enter the conveying pipe 5. Then, the electrically controlled butterfly valve 17 is opened so that the raw materials can enter the storage cylinder 6 for storage.

[0024] Reference Figure 1 and Figure 6As shown, the discharge metering mechanism includes a servo motor 18, which is fixedly connected to the bottom of the storage cylinder 6. Two stirring rods 19 are fixedly connected to the output end of the servo motor 18. A heater 20 is fixedly connected to the inside of the storage cylinder 6. An air pump 21 is fixedly connected to the bottom of the storage cylinder 6. An air pipe 22 is connected to the output end of the air pump 21. One end of the air pipe 22 passes through the top of the storage cylinder 6 and extends into the inside of the storage cylinder 6. A discharge pipe 23 is connected to one side of the storage cylinder 6. An electrically controlled butterfly valve 24 is installed inside the discharge pipe 23. A liquid flow meter 25 is installed at the top of the discharge pipe 23. The detection end of the liquid flow meter 25 extends into the discharge pipe 23. Gas is discharged from the inside of the storage cylinder 6 through the air pump 21 and the air pipe 22, so that the raw material can enter the inside of the storage cylinder 6 better through the second conveying pipe 5 for collection. After the raw material is collected into the inside of the storage cylinder 6, the first electrically controlled butterfly valve 17 is closed and the second electrically controlled butterfly valve 24 is opened. Gas is filled into the inside of the storage cylinder 6 through the air pump 21 and the air pipe 22, so that the raw material inside the storage cylinder 6 is input into the blown film machine through the discharge pipe 23. The liquid flow meter 25 is used to monitor the flow rate of the raw material through the discharge pipe 23.

[0025] The working principle of this utility model is as follows: Before feeding the plastic granules, the raw material is first placed into the heating cylinder 1 through the cover plate 3. Then, the heater 16 heats the inside of the heating cylinder 1. Then, the servo motor 7 drives the rotating shaft 8, which in turn drives the two stirring rods 9 to rotate. At the same time, the rotating shaft 8 drives the stirring fan 11 and the two stirring fans 12 to rotate, causing the raw material to be stirred, heated, and melted. After the raw material melts into a liquid state, the opposing fan blades of the stirring fan 11 and the two stirring fans 12 allow the liquid raw material to enter the heating cylinder 1. Irregular stirring is performed to mix the raw materials. Then, butterfly valve 13 and electrically controlled butterfly valve 17 are opened, allowing the raw materials to move to one side of the inclined plate 15 through the feed pipe 14. As the servo motor 24 drives the turntable 26 and multiple inclined plates 15 to rotate, the raw materials can enter the interior of the feed pipe 25 more effectively. Then, the air pump 21 will draw air into the interior of the storage cylinder 6 through the air pipe 22, creating a negative pressure environment inside the storage cylinder 6. The raw materials inside the feed pipe 25 can then enter the interior of the storage cylinder 6 at a uniform speed.

[0026] When the storage cylinder 6 is almost full of raw materials, the electric butterfly valve 17 is closed, and the inside of the storage cylinder 6 is heated by the heater 20. The servo motor 318 drives the two stirring rods 219 to stir the raw materials, so that the raw materials can be stirred and heated while being stored inside the storage cylinder 6. The air pump 21 starts to input air into the storage cylinder 6, and at the same time, the discharge pipe 23 is opened so that it can be connected to the feed port of the blown film machine, so that the raw materials can be transported into the blown film machine through the discharge pipe 23. The amount of raw materials being transported is monitored by the liquid flow meter 25, thereby controlling the amount of raw materials fed. Finally, during the feeding process of the storage cylinder 6, the heating cylinder 1 can continue to heat the raw materials.

[0027] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0028] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic feeding and metering structure for a blown film machine in plastic processing, comprising a heating cylinder (1), characterized in that: A fixing frame (2) is fixedly connected to the outside of the heating cylinder (1), a cover plate (3) is rotatably connected to the top of the heating cylinder (1), a heater (16) is installed inside the heating cylinder (1), a conveying pipe (4) is connected to the bottom of the heating cylinder (1), a conveying pipe (5) is fixedly connected to one side of the conveying pipe (4), an electric control butterfly valve (17) is installed inside the conveying pipe (5), a storage cylinder (6) is fixedly connected to one side of the conveying pipe (5), a servo motor (7) is fixedly connected to the top of the heating cylinder (1), and a pretreatment mechanism is provided inside the heating cylinder (1). The pretreatment mechanism includes a rotating shaft (8), two stirring rods (9) are fixedly connected to the outside of the rotating shaft (8), a plurality of cleaning rods (10) are fixedly connected to the outside of the stirring rods (9), a stirring fan (11) is fixedly connected to the outside of the rotating shaft (8), and two stirring fans (12) are fixedly connected to the bottom of the rotating shaft (8). The storage cylinder (6) is equipped with a discharge metering mechanism on its inner side.

2. The automatic feeding and metering structure for a blown film machine in plastic processing according to claim 1, characterized in that: A butterfly valve (13) is installed inside the first conveying pipe (4), and a servo motor (14) is fixedly connected to one side of the first conveying pipe (4). A turntable (26) is fixedly connected to the output end of the servo motor (14).

3. The automatic feeding and metering structure for a blown film machine in plastic processing according to claim 2, characterized in that: Multiple inclined plates (15) are fixedly connected to one side of the turntable (26), and the inclined plates (15) are arranged in a ring array on one side of the turntable (26).

4. The automatic feeding and metering structure for a blown film machine in plastic processing according to claim 1, characterized in that: The discharge metering mechanism includes a servo motor three (18), the outer side of which is fixedly connected to the bottom of the storage cylinder (6), and the output end of the servo motor three (18) is fixedly connected to two stirring rods two (19).

5. The automatic feeding and metering structure for a blown film machine in plastic processing according to claim 1, characterized in that: A heater (20) is fixedly connected to the inside of the storage cylinder (6), and an air pump (21) is fixedly connected to the bottom of the storage cylinder (6).

6. The automatic feeding and metering structure for a blown film machine in plastic processing according to claim 5, characterized in that: The output end of the air pump (21) is connected to an air pipe (22), one end of which passes through the top of the storage cylinder (6) and extends into the interior of the storage cylinder (6).

7. The automatic feeding and metering structure for a blown film machine in plastic processing according to claim 1, characterized in that: The storage cylinder (6) is connected to a discharge pipe (23) on one side. An electrically controlled butterfly valve (24) is installed inside the discharge pipe (23). A liquid flow meter (25) is installed on the top of the discharge pipe (23), and the detection end of the liquid flow meter (25) extends into the discharge pipe (23).

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