A film blowing machine material changing device

Abstract

The utility model discloses a kind of film blowing machine material changing device, it is related to plastic processing equipment technical field, including material cylinder, material cylinder is used to load raw material particle, the top of material cylinder is connected with feed pipe, raw material bucket is arranged below feed pipe, material cylinder is equipped with discharge port, material cylinder bottom is also equipped with back material port;Back material port is connected with back material hose, the bottom of feed pipe is connected with tee pipe, one end of tee pipe is connected with back material hose, tee pipe bottom one end is connected with main pipe that extends into raw material bucket;Electromagnetic valve one is connected on feed pipe, electromagnetic valve two is connected on back material hose;Automatic feeding and unloading process, without manual one by one operation material cylinder, shorten material changing time.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing equipment technology, specifically to a material changing device for a blown film machine. Background Technology

[0002] After the blown film machine finishes producing the product of one order, when it produces another order, the raw materials of the product are different. It is necessary to change the materials of the previous order to the materials required for the product of the next order. In addition, the product formula is complicated (nine layers co-extrusion with a total of 40 material cylinders) and there are many formula materials.

[0003] Currently, because the extruder of the downblown extruder is located on the third-level platform, while the barrel is at the highest point of the extruder, changing materials requires personnel to climb onto the high-temperature heated extruder, which is about 1.5 meters high, while carrying woven bags. After unscrewing the discharge cap of the barrel, they hold the bottom of the bag by hand and unload all 18 kg of material from the barrel into the woven bag. After screwing the discharge cap back on, they manually carry the replaced 18 kg of material to the designated raw material area. This frequent climbing of high-temperature equipment poses safety risks such as burns and falls for the operators. Furthermore, changing material from 40 barrels one by one is inefficient and time-consuming, affecting production progress. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a material changing device for a blown film machine, comprising a material cylinder for loading raw material particles. A feed pipe is connected to the top of the material cylinder, and a raw material container is located below the feed pipe. The material cylinder has a discharge port and a return port at its bottom. A return hose is connected to the return port. A T-junction is connected to the bottom of the feed pipe, with one end connected to the return hose and the bottom end connected to a main pipe extending into the raw material container. A solenoid valve one is connected to the feed pipe, and a solenoid valve two is connected to the return hose. Both solenoid valve one and solenoid valve two are 36V solenoid valve switches with a diameter of 50mm.

[0005] Furthermore, a pressure sensor is connected to the feed pipe, a pressure sensor is connected to the return hose, and a material level sensor is installed inside the material cylinder.

[0006] Furthermore, a positioning frame is provided on the outside of the raw material barrel, the raw material barrel is inserted into the positioning frame, and a pressure sensor is installed at the bottom of the positioning frame.

[0007] Furthermore, to facilitate the replacement of raw material barrels, a transfer seat is provided on the side of the positioning frame, and multiple rotating rollers are rotatably connected to the top of the transfer seat.

[0008] Furthermore, the return hose is a food-grade steel wire hose.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. The automated feeding and unloading process eliminates the need for manual operation of each material cylinder, shortening material changeover time. Compared to traditional manual material changeover, it can increase material changeover efficiency several times, reduce equipment downtime, reduce the workload of manual material handling, lower the labor intensity of operators, and reduce the risk of physical injury caused by long-term high-intensity labor.

[0011] 2. Operators do not need to climb onto the high-temperature extruder to perform material changing operations, avoiding safety risks such as burns and falls, and ensuring the personal safety of operators; pressure sensors and material level sensors monitor pipeline pressure and barrel material level in real time, and can promptly detect abnormalities such as pipeline blockage and material shortage in the barrel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the connection structure of the positioning frame in this utility model;

[0014] Figure 3 This is a schematic diagram of the structure before the improvement.

[0015] The following are the annotations in the attached diagram: 1. Material cylinder; 2. Raw material particles; 3. Feed pipe; 4. Raw material bucket; 5. Return hose; 6. T-connector; 7. Main pipe; 8. Solenoid valve one; 9. Solenoid valve two; 10. Pressure sensor one; 11. Pressure sensor two; 12. Material level sensor; 13. Pressure sensor; 14. Positioning frame; 15. Transfer seat; 16. Rotary roller. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Example 1

[0020] A blown film machine material changing device, such as Figure 1 As shown, the device includes a material cylinder 1 for loading raw material particles 2. A feed pipe 3 is connected to the top of the material cylinder 1, and a raw material bucket 4 is located below the feed pipe 3. The material cylinder 1 has a discharge port and a return port at the bottom. A return hose 5, which is a food-grade steel wire hose, is connected to the return port. A T-connector 6 is connected to the bottom of the feed pipe 3. One end of the T-connector 6 is connected to the return hose 5, and the bottom end of the T-connector 6 is connected to a main pipe 7 that extends into the raw material bucket 4. A solenoid valve 1 8 is connected to the feed pipe 3, and a solenoid valve 2 9 is connected to the return hose 5. Both solenoid valve 1 8 and solenoid valve 2 9 are 36V solenoid valve switches with a diameter of 50mm.

[0021] It enables automated feeding and unloading, replacing manual operation, effectively reducing safety risks and improving material changing efficiency.

[0022] Example 2

[0023] like Figure 1 As shown, based on Embodiment 1 above, in this embodiment, a pressure sensor 10 is also connected to the feed pipe 3, a pressure sensor 11 is also connected to the return hose 5, and a material level sensor 12 is installed inside the material cylinder 1. Through real-time monitoring by the pressure sensors 10 and 11, abnormal situations such as pipe blockage and material shortage in the material cylinder 1 can be detected in a timely manner, ensuring stable production.

[0024] like Figure 2 As shown, to facilitate the replacement of the raw material barrel 4, a positioning frame 14 is provided on the outside of the raw material barrel 4. The raw material barrel 4 is inserted into the positioning frame 14, and a pressure sensor 13 is installed at the bottom of the positioning frame 14. A transfer seat 15 is provided on the side of the positioning frame 14, and multiple rotating rollers 16 are rotatably connected to the top of the transfer seat 15. The pressure sensor 13 can also display the actual weight of the raw material used, that is, the initial weight minus the weight after the return material, so as to intuitively reflect the processing volume.

[0025] The working principle of this utility model is as follows:

[0026] like Figure 3 The diagram shown is a structural schematic of the present invention before the improvement. Please refer to this diagram for further details. Figure 1 and Figure 2 When the blown film machine needs to perform a feeding operation, the control system first receives the feeding command and then sends control signals to solenoid valve 8 and solenoid valve 9. At this time, solenoid valve 9 automatically closes, cutting off the passage of the return hose 5 to prevent material backflow; at the same time, solenoid valve 8 opens, and the material in the raw material storage area enters the material cylinder 1 through the feeding pipe 3 under the action of the pumping equipment. During the feeding process, pressure sensor 10 monitors the pressure in the feeding pipe 3 in real time. If the pressure is too high, it indicates that there may be a blockage in the pipe or that the feeding speed is too fast. Pressure sensor 10 feeds the signal back to the control system, and the control system adjusts the feeding speed or issues an alarm to prompt the operator to check; level sensor 12 monitors the material level in the material cylinder 1 in real time. When the material level reaches the preset height, level sensor 12 feeds the signal back to the control system, and the control system issues a command to close solenoid valve 8 and stop feeding.

[0027] When unloading is required, the control system receives the unloading command and sends new control signals to solenoid valves 8 and 9. At this time, solenoid valve 8 automatically closes, preventing new material from entering the material cylinder 1; simultaneously, solenoid valve 9 opens, and the remaining material in the material cylinder 1, under gravity, enters the return hose 5 through the return port, then passes through the tee pipe 6 and the main pipe 7, finally falling into the raw material barrel 4. During the unloading process, pressure sensor 11 monitors the pressure in the return hose 5 in real time. If the pressure is abnormal, it indicates that there may be a blockage or leakage in the return pipeline. Pressure sensor 11 feeds the signal back to the control system, which issues an alarm and takes corresponding measures, such as closing solenoid valve 9, to prevent material leakage or further blockage.

[0028] During use, the pressure sensor 13 at the bottom of the positioning frame 14 continuously monitors the weight of the material inside the raw material barrel 4. When the weight of the material inside the raw material barrel 4 reaches a preset threshold, the pressure sensor 13 sends a signal back to the control system, which then issues a prompt signal to remind the operator to replace the raw material barrel 4. The operator places the empty raw material barrel 4 on the roller 16 of the transfer seat 15, and uses the rolling motion of the roller 16 to transfer the raw material barrel 4 to the designated storage area. Then, the raw material barrel 4 filled with material is placed back into the positioning frame 14 to continue the material recycling process. At the same time, the pressure sensor 13 can also display the actual weight of the raw material used, i.e., the initial weight minus the weight after recycling, to intuitively reflect the processing volume.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A blown film machine material changing device, comprising a material cylinder (1) for loading raw material particles (2), a feeding pipe (3) connected to the top of the material cylinder (1), a raw material bucket (4) disposed below the feeding pipe (3), a discharge port on the material cylinder (1), and a return port on the bottom of the material cylinder (1); characterized in that: A return hose (5) is connected to the return port, and a three-way pipe (6) is connected to the bottom of the feed pipe (3). One end of the three-way pipe (6) is connected to the return hose (5), and the bottom end of the three-way pipe (6) is connected to the main pipe (7) that extends into the raw material barrel (4). A solenoid valve one (8) is connected to the feed pipe (3), and a solenoid valve two (9) is connected to the return hose (5). Both solenoid valve one (8) and solenoid valve two (9) are 36V solenoid valve switches with a diameter of 50mm.

2. The blown film machine material changing device according to claim 1, characterized in that: Pressure sensor 1 (10) is connected to the feed pipe (3), pressure sensor 2 (11) is connected to the return hose (5), and a material level sensor (12) is installed inside the material cylinder (1).

3. The blown film machine material changing device according to claim 1, characterized in that: A positioning frame (14) is provided on the outside of the raw material barrel (4), the raw material barrel (4) is inserted into the positioning frame (14), and a pressure sensor (13) is installed at the bottom of the positioning frame (14).

4. The blown film machine material changing device according to claim 3, characterized in that: To facilitate the replacement of the raw material barrel (4), a transfer seat (15) is provided on the side of the positioning frame (14), and multiple rotating rollers (16) are rotatably connected to the top of the transfer seat (15).

5. The blown film machine material changing device according to claim 1, characterized in that: The return hose (5) is a food-grade steel wire hose.

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