Film cooling mechanism of blow molding machine for blown film production

Abstract

The utility model relates to the technical field of film blowing production, and discloses a film cooling mechanism of a blowing machine for blown film production, which is characterized in that a water cooling component is mounted at one end of a framework of a traction frame, and an air cooling component is mounted in the middle of the framework of the traction frame; and two groups of traction roll shafts are vertically and symmetrically arranged at the other end of the frame of the traction frame. According to the utility model, synchronous water-cooling conduction cooling work is carried out on the upper and lower surfaces of the film based on water-cooling cooling of two groups of cooling roll shafts in the water-cooling assembly, then air-cooling cooling work is carried out on the upper and lower surfaces of the film again based on vertically opposite cooling fans in the air-cooling assembly, and then the film subjected to water-cooling and air-cooling cooling is dragged by a traction roll shaft, so that the film is cooled and cooled. And the device has good cooling performance, and can be used for carrying out synchronous and water-cooling and air-cooling parallel cooling work on the upper surface and the lower surface of the blown film.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing production, in particular to a film cooling mechanism for a blowing machine used in the production of blown films. Background Technique

[0002] Blown film is one of the methods for plastic film forming. The process is to melt and plasticize the resin by an extruder and extrude it into a thin-walled tube. Then, under the action of a traction device, using the good flow state of the polymer at this time, it is blown up to the required thickness by compressed air and becomes a film after cooling and shaping. After the blown film is formed, the surface of the film still has a relatively high temperature. If the film is directly wound and wound up, it is very easy to cause the film to stick. Therefore, it is necessary to use a cooling device to cool down the blown film. As shown in a film cooling mechanism for a blowing machine used in the production of polyethylene blown films disclosed on the Chinese Patent Network (publication number CN217144596U), when such a device cools down the film, the film to be cooled is conveyed by a moving crawler, and then the copper plate is lowered to closely fit the heat-conducting pad to the film to be cooled for cooling and temperature reduction work.

[0003] However, for the film blowing cooling mechanism adopted in the above-mentioned disclosed patent and the existing market, there are still some deficiencies: the existing method of using a cooling component to press down and fit with the film for cooling and temperature reduction can only cool and temperature-reduce the film in a single-sided form. While the effect of uniform heat transfer of cold is poor and the cooling time is relatively long, it is very easy to have an incomplete cooling and temperature reduction situation. For this reason, technical personnel in the field have provided a film cooling mechanism for a blowing machine used in the production of blown films to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a film cooling mechanism for a blowing machine used in the production of blown films, which can effectively solve the problem of poor cooling and temperature reduction effect of the existing film blowing cooling mechanism in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a film cooling mechanism for a blowing machine used in the production of blown films, including a traction frame;

[0006] One end of the frame of the traction frame is installed with a water cooling component, and the middle of the frame of the traction frame is installed with an air cooling component. Two groups of traction roller shafts are symmetrically arranged vertically at the other end of the frame of the traction frame;

[0007] The water cooling assembly includes two groups of cooling rollers installed in a horizontally symmetrical form at one end of the traction frame and a water cooling box installed on the traction frame bottom frame, one end of the cooling roller shaft is installed with a water cooling pipeline connected to the water cooling box, and the other end of the cooling roller shaft is installed with a return pipeline connected to the water cooling box, and the inside of the cooling roller shaft is provided with a plurality of groups of water cooling chambers connected to the water cooling pipeline and the return pipeline arranged along the circumference thereof;

[0008] The air cooling assembly includes a first air cooling plate and a second air cooling plate installed in a vertically symmetrical manner in the middle of the traction frame. The first air cooling plate has a first cooling fan installed symmetrically through the plate surface, and the second air cooling plate has a second cooling fan installed symmetrically on the plate surface.

[0009] As a further solution of the utility model: the water cooling pipeline is rotatably connected to the cooling roller shaft via a first sealing collar, and the return pipeline is rotatably connected to the cooling roller shaft via a second sealing collar.

[0010] As a further solution of the present invention: the first cooling fan and the second cooling fan are arranged in an opposite manner.

[0011] As a further solution of the utility model: a brake motor is installed on the base frame of the traction frame opposite to the shaft direction of the traction roller, the brake motor is connected to the traction roller by a transmission belt, and the traction roller is connected to the cooling roller by a synchronous belt.

[0012] As a further solution of the utility model: the output end of the brake motor is provided with a differential pulley A, one end of the shaft of one set of the traction roller shafts is provided with a differential pulley B vertically opposite to the differential pulley A, and the differential pulley A and the differential pulley B are connected by a transmission belt;

[0013] One end of the shaft of one group of cooling roller shafts is provided with a synchronous pulley B, and one end of the shaft of one group of traction roller shafts is provided with a synchronous pulley A horizontally opposite to the synchronous pulley B, and the synchronous pulley A is connected to the synchronous pulley B through a synchronous belt transmission.

[0014] As a further solution of the utility model: the two groups of traction roller shafts are connected to each other through matching gears installed at the other ends of their shafts.

[0015] As a further solution of the utility model: the other ends of the shafts of the two groups of cooling roller shafts are provided with synchronous gears, and the two adjacent groups of synchronous gears are connected through the meshing transmission of transmission gears.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] When the utility model cools the blown film, based on the water cooling of two cooling roller shafts in the water cooling component, the upper and lower surfaces of the film are synchronously cooled by water conduction, and then based on the upper and lower opposite cold fans in the air cooling component, the upper and lower surfaces of the film are cooled by air again. Then, the film after water cooling and air cooling is steadily pulled out under the traction of the traction roller shaft. On the one hand, it has good cooling performance, can cool the blown film synchronously on the upper and lower sides, and carry out water cooling and air cooling in parallel to improve the cooling efficiency. On the other hand, it has stable traction and cooling performance, and can stably cool and pull the blown film. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural view of a film cooling mechanism of a blow molding machine for blow molding film production according to the utility model;

[0019] Figure 2 It is a right view of a film cooling mechanism of a blow molding machine for blow molding film production according to the utility model;

[0020] Figure 3 It is a schematic structural view of the water cooling component in a film cooling mechanism of a blow molding machine for blow molding film production according to the utility model.

[0021] In the figure: 1, traction frame; 2, water cooling box; 3, synchronous gear; 4, transmission gear; 5, cooling roller shaft; 6, first air cooling plate; 7, first cold fan; 8, second air cooling plate; 9, second cold fan; 10, traction roller shaft; 11, engaging gear; 12, braking motor; 13, differential pulley A; 14, transmission belt; 15, differential pulley B; 16, synchronous pulley A; 17, synchronous belt; 18, synchronous pulley B; 19, water cooling pipeline; 20, first sealing shaft ring; 21, water cooling cavity; 22, second sealing shaft ring; 23, return pipeline. Detailed Embodiment

[0022] In order to make the technical means, creative features, achieved purposes and effects of the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Please refer to Figures 1-3 As shown, a film cooling mechanism for a blow molding machine for blown film production comprises a traction frame 1; two groups of traction rollers 10 are arranged in a vertically symmetrical form at the other end of the frame of the traction frame 1, a brake motor 12 is installed on the bottom frame of the traction frame 1 opposite to the shaft direction of the traction roller 10, the brake motor 12 is connected to the traction roller 10 through a transmission belt 14, a differential pulley A13 is arranged at the output end of the brake motor 12, one end of the shaft of one group of traction rollers 10 is provided with a differential pulley B15 vertically opposite to the differential pulley A13, and the differential pulley A13 is connected to the differential pulley B15 through a transmission belt 14, and the brake motor 12 is controlled to work, so as to drive the combination of the differential pulley A13, the transmission belt 14 and the differential pulley B15 to rotate as a driving source, and the traction roller 10 is driven to rotate.

[0026] The traction roller 10 and the cooling roller 5 are connected via a synchronous belt 17, wherein a synchronous pulley B18 is provided at one end of the shaft of one group of cooling rollers 5, and a synchronous pulley A16 horizontally opposite to the synchronous pulley B18 is provided at one end of the shaft of one group of traction rollers 10, and the synchronous pulley A16 is connected to the synchronous pulley B18 via a synchronous belt 17. When the traction roller 10 rotates, the cooling roller 5 is driven to rotate synchronously with the traction roller 10 by utilizing the transmission combination of the synchronous pulley A16, the synchronous belt 17 and the synchronous pulley B18.

[0027] The two sets of traction rollers 10 are connected through the mating gears 11 installed at the other end of the shafts. The two sets of traction rollers 10 maintain symmetrical rotation under the symmetrical meshing transmission of the mating gears 11, and continuously traction the cooled film to ensure stable traction and cooling of the film.

[0028] A synchronous gear 3 is provided at the other end of the shaft of the two sets of cooling roller shafts 5, and the two adjacent sets of synchronous gears 3 are connected by meshing transmission through the transmission gear 4. The two sets of synchronous gears 3 maintain synchronous rotation under the transfer transmission of the transmission gear 4, and then drive the two sets of cooling roller shafts 5 to rotate synchronously, and evenly transfer the cold on the cooling roller shaft 5 to the film.

[0029] One end of the frame of the traction frame 1 is installed with a water-cooling component. The water-cooling component includes two groups of cooling roller shafts 5 installed at one end of the frame of the traction frame 1 in a horizontally symmetrical form and a water-cooling box 2 installed on the chassis of the traction frame 1. One end of the shaft rod of the cooling roller shaft 5 is installed with a water-cooling pipeline 19 that is conductively connected to the water-cooling box 2, and the other end of the shaft rod of the cooling roller shaft 5 is installed with a return pipeline 23 that is conductively connected to the water-cooling box 2. A plurality of water-cooling cavities 21 that are conductively connected to the water-cooling pipeline 19 and the return pipeline 23 are arranged along the circumferential direction inside the shaft rod of the cooling roller shaft 5. The water-cooling pipeline 19 is rotationally connected to the cooling roller shaft 5 through a first sealing shaft ring 20, and the return pipeline 23 is rotationally connected to the cooling roller shaft 5 through a second sealing shaft ring 22. By using the intermediate connection of the first sealing shaft ring 20 and the second sealing shaft ring 22, while the cooling roller shaft 5 rotates, it still maintains a conductive state with the water-cooling pipeline 19 and the return pipeline 23. The cold quantity on the cooling roller shaft 5 is transmitted to the film in a rotational transmission manner to uniformly and efficiently cool down the film.

[0030] In the middle of the frame of the traction frame 1, an air-cooling component is installed. The air-cooling component includes a first air-cooling plate 6 and a second air-cooling plate 8 installed in the middle of the frame of the traction frame 1 in an up-and-down symmetrical form. The plate surface of the first air-cooling plate 6 is symmetrically penetrated and installed with first cold fans 7, and the plate surface of the second air-cooling plate 8 is symmetrically installed with second cold fans 9. The first cold fans 7 and the second cold fans 9 are arranged in an opposing form. By using the opposing arrangement of the first cold fans 7 and the second cold fans 9, the film passing between them is cooled by air on the upper and lower surfaces synchronously.

[0031] The working principle of the present utility model is as follows: When cooling and lowering the temperature of the blown film, first, the film to be cooled is sequentially pulled out from the upper and lower ends of the two groups of cooling roller shafts 5, so that the upper and lower surfaces of the film are sequentially tensioned and pulled on the two groups of cooling roller shafts 5, and then the film is pulled out through between the first cold fan 7 and the second cold fan 9, and the two groups of traction roller shafts 10 are used to perform the terminal traction work on the film;

[0032] After the film is tensioned and pulled, the braking motor 12 is controlled to work, driving the combined rotation of the differential pulley A 13, the transmission belt 14, and the differential pulley B 15. As a driving source, one of the traction roller shafts 10 is driven to rotate. Then, the two groups of traction roller shafts 10 keep symmetrically rotating under the symmetric meshing transmission of the mating gears 11, performing continuous traction work on the film, so that the film is stably traction-cooled. At the same time, when the traction roller shaft 10 rotates, the cooling roller shaft 5 is driven to rotate synchronously with the traction roller shaft 10 by using the transmission combination of the synchronous pulley A 16, the synchronous belt 17, and the synchronous pulley B 18. The cold quantity on the cooling roller shaft 5 is uniformly transmitted to the film by using the meshing transmission of the synchronous gear 3 and the transmission gear 4 to drive the two groups of cooling roller shafts 5 to rotate synchronously;

[0033] Further, during the continuous pulling of the film, the water cooling box 2 supplies the cold quantity inside it to the water cooling cavity 21 of the cooling roller 5 through the water cooling pipeline 19, cools down the cooling roller 5 by water cooling, transfers the cold quantity to the cooling roller 5, and cools down the film in the form of water cooling. Then, the cold quantity after heat exchange circulates back to the water cooling box 2 through the return pipeline 23 for re-cooling. Synchronously, by blowing the opposite-direction air of the first cold air fan 7 and the second cold air fan 9, the film passing between them is cooled by air on both the upper and lower surfaces synchronously, and the water cooling and air cooling are carried out synchronously.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A film cooling mechanism for a blow molding machine for producing blown films, characterized in that: comprising a traction frame (1); A water cooling component is installed at one end of the frame of the traction frame (1), and an air cooling component is installed in the middle of the frame of the traction frame (1); and two groups of traction rollers (10) are arranged in a vertically symmetrical manner at the other end of the frame of the traction frame (1); The water cooling assembly comprises two groups of cooling roller shafts (5) mounted in a horizontally symmetrical manner on one end of the frame of the traction frame (1) and a water cooling box (2) mounted on the bottom frame of the traction frame (1); one end of the shaft of the cooling roller shaft (5) is mounted with a water cooling pipeline (19) which is in communication with the water cooling box (2); and the other end of the shaft of the cooling roller shaft (5) is mounted with a return pipeline (23) which is in communication with the water cooling box (2); and a plurality of groups of water cooling chambers (21) which are arranged along the circumference of the shaft of the cooling roller shaft (5) and are in communication with the water cooling pipeline (19) and the return pipeline (23); The air cooling assembly comprises a first air cooling plate (6) and a second air cooling plate (8) which are symmetrically mounted on the middle part of the frame of the traction frame (1); a first cooling fan (7) is symmetrically mounted on the plate surface of the first air cooling plate (6); and a second cooling fan (9) is symmetrically mounted on the plate surface of the second air cooling plate (8).

2. A film cooling mechanism for a blow molding machine for blown film production according to claim 1, characterized in that: The water cooling pipeline (19) is rotationally connected to the cooling roller shaft (5) via a first sealing shaft ring (20), and the return pipeline (23) is rotationally connected to the cooling roller shaft (5) via a second sealing shaft ring (22).

3. A film cooling mechanism for a blow molding machine for blown film production according to claim 1, characterized in that: The first cooling fan (7) and the second cooling fan (9) are arranged in an opposing manner.

4. A film cooling mechanism for a blow molding machine for blown film production according to claim 1, characterized in that: A brake motor (12) is installed on the bottom frame of the traction frame (1) in the direction of the shaft of the traction roller (10); the brake motor (12) and the traction roller (10) are connected to each other via a transmission belt (14); and the traction roller (10) and the cooling roller (5) are connected to each other via a synchronous belt (17).

5. A film cooling mechanism for a blow molding machine for producing blown film according to claim 4, characterized in that: A differential pulley A (13) is disposed at the output end of the brake motor (12), and a differential pulley B (15) vertically opposite to the differential pulley A (13) is disposed at one end of the shaft of one set of the traction roller shafts (10), and the differential pulley A (13) and the differential pulley B (15) are connected to each other by a transmission belt (14); One end of the shaft of one group of the cooling roller shafts (5) is provided with a synchronous pulley B (18), and one end of the shaft of one group of the traction roller shafts (10) is provided with a synchronous pulley A (16) horizontally opposite to the synchronous pulley B (18), and the synchronous pulley A (16) and the synchronous pulley B (18) are connected to each other through a synchronous belt (17).

6. A film cooling mechanism for a blow molding machine for producing blown film according to claim 1, characterized in that: The two groups of traction roller shafts (10) are connected to each other through a matching gear (11) installed at the other end of the shaft.

7. A film cooling mechanism for a blow molding machine for producing blown film according to claim 1, characterized in that: The other ends of the shafts of the two sets of cooling roller shafts (5) are both provided with synchronous gears (3), and the two adjacent sets of synchronous gears (3) are meshed and connected through transmission gears (4).

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