A cooling guide roller for a film blowing machine

Abstract

A kind of blown film machine cooling guide roller, including support plate and guide roller, two groups of support plate are provided with guide roller between it, it is characterized in that, the support plate is installed on water tank, the liquid outlet of water tank is equipped with cooler, the liquid outlet of cooler is connected with guide roller respectively by infusion tube, the other end of guide roller is connected with liquid return pipe, the other end of liquid return pipe is connected on the liquid return port of water tank, and circulation pump is arranged on liquid return pipe, the air cooling component is equipped on the support plate, the utility model discloses a circulating cooling water system of cooler, circulation pump and water tank is cooled to guide roller by water, not only need not artificial regularly check water temperature in water tank and carry out regular replacement to prevent water temperature rise operation, use more convenient;And by heat dissipation fan, the air cooling of guide roller is realized, the combination of the two, greatly improve the cooling effect of guide roller.

Description

Technical Field

[0001] This utility model relates to the field of cooling guide rollers for blown film machines, and in particular to a cooling guide roller for blown film machines. Background Technology

[0002] Film blowing is a plastic processing method that involves heating and melting plastic particles and then blowing them into a thin film. Typically, polymers are extruded into tubular preforms, which are then blown into the required thickness using high-pressure air under good melt flow conditions. After cooling and setting, the film becomes a thin film. A film blowing machine is a device that heats and melts plastic particles and then blows them into a thin film.

[0003] Chinese Utility Model Patent No. CN218985464U discloses a cooling roller for a plastic blown film machine, including a cooling box. Two support plates are fixedly connected to the upper end of the cooling box, and three cooling roller bodies are arranged between the two support plates. Each cooling roller body has a connecting pipe at both ends that penetrates the cooling roller body and is rotatably connected to the penetration portion via a waterproof bearing. The connecting pipe penetrates the support plate and is rotatably connected to the penetration portion via a limiting bearing. One end of the connecting pipe at one end of each cooling roller body has a liquid delivery pipe that penetrates the connecting pipe and is rotatably connected to the penetration portion via a waterproof bearing. A hollow box is fixedly connected to the upper end of the cooling box at the lower end of the liquid delivery pipe. This utility model's cooling roller for a plastic blown film machine can cool the plastic film during the feeding process, thereby facilitating the subsequent winding process and improving practicality.

[0004] The aforementioned prior art reduces the temperature of the cooling roller by supplying cooling water into the inside of the guide roller. However, directly supplying liquid into the inside of the roller can easily lead to leakage, posing a risk of cooling water leakage contaminating the membrane or damaging the equipment. Moreover, the prior art requires manual monitoring of the water temperature in the cooling tank and regular replacement to prevent the water temperature from rising, which can easily result in untimely cooling water replacement and poor cooling efficiency.

[0005] Given these issues, further optimization and improvement are needed. Utility Model Content

[0006] In view of the above-mentioned technical problems, this utility model provides a cooling guide roller for a blown film machine. The guide roller is water-cooled by designing a circulating cooling water system consisting of a cooler, a circulating pump and a water tank, and air-cooled by a cooling fan. The combination of the two greatly improves the cooling effect of the guide roller.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A cooling guide roller for a blown film machine includes a support plate and a guide roller, with the guide roller disposed between two sets of support plates. The support plate is mounted on a water tank, and a cooler is installed at the outlet of the water tank. The outlet of the cooler is connected to the guide roller via a liquid delivery pipe. The other end of the guide roller is connected to a return pipe, and the other end of the return pipe is connected to the return port of the water tank, with a circulation pump installed on the return pipe. An air-cooling assembly is mounted on the support plate.

[0009] The air-cooling component includes a cooling fan. On one side of the support plate, there is a mounting groove located between adjacent guide rollers, and the cooling fan is installed in the mounting groove. On the other side of the support plate, there are ventilation holes. The cooling fan accelerates the airflow between the guide rollers, thereby effectively dissipating heat from their surfaces.

[0010] The guide roller consists of a roller body, connecting rings, and a connecting shaft. Connecting rings are provided at both ends of the roller body. The connecting rings are connected to the connecting shaft, and the connecting shaft is mounted on the support plate through a first bearing.

[0011] Furthermore, a heat exchange tube is provided in the inner cavity of the roller body, one end of which is connected to the infusion pipe and the other end is connected to the return pipe.

[0012] Furthermore, both the infusion tube and the return tube pass through the central hole of the connecting shaft and are connected to the heat exchange tube, and a second bearing is provided at the connection between the infusion tube, the return tube and the connecting shaft.

[0013] Furthermore, the first bearing has an internal rotation but external non-rotation structure, and the second bearing has an internal non-rotation but external rotation structure.

[0014] Furthermore, the water tank is provided with an injection port and an outlet, and both the injection port and the outlet are equipped with sealing caps.

[0015] The beneficial effects of this utility model are:

[0016] This invention uses a water tank, a cooler, and a circulating pump to form a cooling circulating water system. The cooler cools the water in the tank, and the cooled water is then transported to the heat exchange tubes inside the roller. After heat exchange, the heated water flows back to the tank through the circulating pump. This process is repeated, eliminating the need for manual monitoring of the water temperature in the tank and regular water replacement to prevent overheating. This makes the system more convenient to use. Furthermore, the heat exchange tubes inside the roller allow for heat exchange between the roller and the cooled water, achieving heat exchange and cooling of the roller and reducing the risk of cooling water leakage during the cooling process.

[0017] This invention features air-cooling components on the two sets of support plates on which the guide rollers are mounted. A cooling fan is used to control the airflow between the guide rollers, effectively reducing the temperature on the outer surface of the rollers. Combined with water cooling, this further enhances the cooling efficiency of the guide rollers. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a cooling guide roller for a blown film machine according to the present invention;

[0019] Figure 2 This is a schematic diagram of the left side structure of a cooling guide roller for a blown film machine according to the present invention;

[0020] Figure 3 This is a schematic diagram of the right side structure of a cooling guide roller for a blown film machine according to the present invention;

[0021] Figure 4 This is a cross-sectional view of the guide roller section of a blown film machine cooling guide roller according to the present invention;

[0022] As shown in the figure: 1. Support plate, 11. Ventilation hole, 21. Roller body, 22. Connecting ring, 23. Connecting shaft, 3. Water tank, 31. Injection port, 32. Return port, 33. Sealing cover, 4. Cooler, 51. Infusion pipe, 52. Heat exchange pipe, 53. Return pipe, 6. Circulating water pump, 7. Cooling fan, 81. First bearing, 82. Second bearing. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] 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 of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] 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. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Example 1

[0027] like Figure 4 As shown, a guide roller is provided between the two sets of support plates 1. The guide roller consists of a roller body 21, a connecting ring 22 and a connecting shaft 23. The two ends of the roller body 21 are respectively provided with connecting rings 22. The connecting rings 22 are connected to the connecting shaft 23. The connecting shaft 23 is mounted on the support plate 1 through a first bearing 81. The first bearing 81 has an internal rotation and external non-rotation structure. The first bearing 81 is a conventionally available bearing that can be purchased. Therefore, it will not be described in detail in this application.

[0028] like Figure 1 Two sets of support plates 1 are respectively installed on the water tank 3. A cooler 4 is installed at the outlet of the water tank 3. The outlet of the cooler 4 is connected to the heat exchange tube 52 installed inside the roller body 21 of each guide roller through a liquid delivery pipe 51. The other end of the heat exchange tube 52 is connected to the return pipe 53. The other end of the return pipe 53 is connected to the return port of the water tank 3, and a circulation pump 6 is installed on the return pipe 53. Among them, such as Figure 4 As shown, both the infusion pipe 51 and the return pipe 53 pass through the central hole of the connecting shaft 23 and connect to the heat exchange pipe 52. A second bearing 82 is provided at the connection point between the infusion pipe 51, the return pipe 53, and the connecting shaft 23. This second bearing 82 has a non-rotating inner and rotating outer structure, thereby allowing the connecting shaft 23 to rotate without affecting the pipeline. The second bearing 82 is a conventionally available bearing, and therefore will not be described in detail in this application.

[0029] like Figure 2 and 3 A cooling assembly is installed on the support plate 1. The cooling assembly includes a cooling fan 7. A mounting groove is provided on one support plate 1 between adjacent guide rollers, and the cooling fan 7 is installed in the mounting groove. A ventilation hole 11 is provided on the other support plate 1. The cooling fan accelerates the airflow between the guide rollers, thereby effectively dissipating heat from their surfaces.

[0030] Furthermore, the water tank 3 is equipped with an injection port 31 and an outlet 32, and the injection port 31 and the outlet 32 ​​are equipped with sealing caps 33, so that the water in the water tank 3 can be replaced, cleaned and injected periodically.

[0031] Example 2

[0032] This utility model consists of a water tank 3, a cooler 4, and a circulating pump 6 to form a cooling circulating water system. The cooler 4 cools the water in the water tank 3. The cooled water is then transported through a conveying pipe 51 to a heat exchange pipe 52 inside the roller body 21. After heat exchange, the heated water flows back to the water tank 3 through the circulating pump 6. This process is repeated, eliminating the need for manual checks on the water temperature in the tank and regular water replacement to prevent the water temperature from rising, making it more convenient to use.

[0033] This utility model provides a heat exchange tube 52 inside the roller body 21. The two ends of the heat exchange tube 52 are connected to the liquid delivery tube 51 and the liquid return tube 53, respectively. The cold water in the heat exchange tube 52 exchanges heat with the roller body 21 to achieve heat exchange and cooling of the roller body 21. Compared with the method of directly delivering water into the roller body, this can reduce the risk of cooling water leakage during the cooling process.

[0034] This invention features air-cooling components on two sets of support plates 1 for the guide rollers. A cooling fan accelerates the airflow between the guide rollers, and the blowing effectively reduces the temperature on the outer surface of the roller body 21. Combined with a circulating water cooling method, this further enhances the cooling efficiency of the guide rollers.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cooling guide roller for a blown film machine, comprising support plates and guide rollers, wherein the guide rollers are disposed between two sets of support plates, characterized in that, The support plate is installed on the water tank. A cooler is installed at the outlet of the water tank. The outlet of the cooler is connected to the guide rollers via a liquid delivery pipe. The other end of the guide rollers is connected to the return pipe. The other end of the return pipe is connected to the return port of the water tank and a circulation pump is installed on the return pipe. An air-cooling assembly is installed on the support plate.

2. A cooling guide roller for a blown film machine according to claim 1, characterized in that... The air-cooling assembly includes a cooling fan. A mounting groove is provided on one side of the support plate between adjacent guide rollers, and the cooling fan is installed in the mounting groove. Ventilation holes are provided on the other side of the support plate.

3. A cooling guide roller for a blown film machine according to claim 1, characterized in that... The guide roller consists of a roller body, connecting rings, and a connecting shaft. Connecting rings are provided at both ends of the roller body. The connecting rings are connected to the connecting shaft, and the connecting shaft is mounted on the support plate through a first bearing.

4. A cooling guide roller for a blown film machine according to claim 3, characterized in that... A heat exchange tube is provided in the inner cavity of the roller body. One end of the heat exchange tube is connected to the infusion pipe, and the other end is connected to the return pipe.

5. A cooling guide roller for a blown film machine according to claim 4, characterized in that... Both the infusion pipe and the return pipe pass through the central hole of the connecting shaft and are connected to the heat exchange pipe, and a second bearing is provided at the connection between the infusion pipe, the return pipe and the connecting shaft.

6. A cooling guide roller for a blown film machine according to claim 5, characterized in that... The first bearing has an internal rotation but external non-rotation structure, and the second bearing has an internal non-rotation but external rotation structure.

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