A water ring lifting device for a blown film machine

Abstract

This utility model discloses a water ring lifting device for a blown film machine, including a base, a lifting frame, and a water ring. The base has a first through hole, and a vertical frame is provided on the base. The vertical frame is equipped with a lifting guide rail and a servo motor. The lifting frame is slidably connected to the lifting guide rail. This device, by setting up the lifting frame, lifting guide rail, and servo motor, with the lifting frame slidably connected to the lifting guide rail, and cooperating with the servo motor to drive the lifting screw to rotate, thereby moving the water ring up and down to adjust the distance between the third through hole and the first through hole. This facilitates the cooling of the film bubble by the water ring, improves the cooling effect, prevents film bubble wrinkling and deformation, ensures film bubble quality, and reduces costs. The overall structure is practical and reliable. Simultaneously, by setting up an automatic aeration device, the device can automatically add or subtract air from the film bubble according to actual conditions, thereby maintaining the stability of the film bubble diameter.

Description

Technical Field

[0001] This utility model relates to the field of thin film equipment technology, and in particular to a water ring lifting device for a blown film machine. Background Technology

[0002] A blown film machine is a plastic processing device that heats and melts plastic particles and blows them into a film. It is mainly used to produce packaging films made of materials such as PE, POF, and PVC, and is widely used in food, pharmaceutical, and agricultural fields. In a blown film machine, a film bubble is blown out through a mold, then stabilized and shaped by a series of components, and finally wound into a film roll. Cooling is involved in the conveying process of the film bubble, but cooling causes thermal expansion and contraction, requiring real-time adjustment to ensure stable conveying. Existing devices cannot quickly maintain the stability of the film bubble, resulting in defects in the quality of the formed film. Publication number CN109016476A provides a cooling device for a blown film machine, including a polygonal air ring located at the die head of the blown film machine. The polygonal air ring is composed of multiple connected air inlet pipes, each with an air outlet and an air inlet. The air outlets of adjacent air inlet pipes are connected, and the air inlet pipes have air holes to achieve uniform airflow to the film to be cooled. However, this device uses air cooling and cannot ensure the stability of the film bubble according to actual conditions. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a water ring lifting device for blown film machines that can maintain the stability of the film bubble.

[0004] To achieve the above objectives, the present invention provides the following solution: a water ring lifting device for a blown film machine, comprising a base, a lifting frame, and a water ring. The base has a first through hole, a vertical frame is provided on the base, a lifting guide rail and a servo motor are provided on the vertical frame, the lifting frame is slidably connected to the lifting guide rail, the servo motor is connected to a lifting screw, the lifting screw is threadedly connected to the lifting frame, the lifting frame has a second through hole that vertically penetrates the lifting frame, the water ring is provided on the lifting frame, a water cooling chamber is formed inside the water ring, a third through hole that vertically penetrates the water ring is formed in the middle of the water cooling chamber, and the third through hole, the second through hole, and the first through hole are arranged opposite each other from top to bottom.

[0005] The lifting frame is equipped with an automatic gas filling device.

[0006] The beneficial effects of this utility model are as follows: It achieves the adjustment of the water ring position. The device is equipped with a lifting frame, a lifting guide rail, and a servo motor. The lifting frame is slidably connected to the lifting guide rail, and the servo motor drives the lifting screw to rotate, thereby moving the water ring up and down to adjust the distance between the third through hole and the first through hole. This facilitates the cooling of the membrane bubble by the water ring, improves the cooling effect, prevents membrane bubble wrinkling and deformation, ensures membrane bubble quality, and reduces costs. The overall structure is practical and reliable. Simultaneously, by incorporating an automatic aeration device, the device can automatically add or subtract gas from the membrane bubble according to actual conditions, thereby maintaining the stability of the membrane bubble diameter.

[0007] Furthermore, the third through hole, the second through hole, and the first through hole are respectively used for the thin film to pass through.

[0008] Furthermore, the lifting screw extends vertically.

[0009] Further, the water ring includes a shell, a first partition plate, and a second partition plate. Both the first and second partition plates are annular in structure. The first and second partition plates are disposed within the shell, with the first and second partition plates positioned inside and outside each other. A water exchange chamber is formed between the first partition plate and the inner wall of the shell. A water-cooling chamber is formed between the first and second partition plates, and the water exchange chamber communicates with the water-cooling chamber. The third through-hole is formed within the second partition plate. With the above structure, the water-cooling chamber cools the membrane bubble passing through the third through-hole.

[0010] Furthermore, an inlet pipe and an outlet pipe are respectively provided on the outer wall of the shell, and the inlet pipe and the outlet pipe are respectively connected to the water exchange chamber. With the above structure, this utility model enables the replacement of water in the water-cooling chamber, ensuring the cooling effect.

[0011] Furthermore, both the inlet and outlet pipes are equipped with switch valves.

[0012] Furthermore, the lifting frame is provided with multiple fixed seats, which are arranged in a ring on the outside of the housing. Each fixed seat is provided with a fixing screw, which abuts against and presses against the housing.

[0013] Furthermore, the automatic aeration device includes a mounting frame, an adjusting seat, and an aeration pipe. The mounting frame is mounted on a lifting frame, and an adjusting screw is rotatably connected to the mounting frame. The adjusting screw is horizontally positioned and threadedly connected to the adjusting seat. The aeration pipe is mounted on the adjusting seat and is located above the water ring. Rotating the adjusting screw moves the aeration pipe closer to or further away from the water ring. This invention, employing the above structure, can accommodate different membrane bubble diameters.

[0014] Furthermore, an adjusting handwheel is fitted onto the adjusting screw.

[0015] Furthermore, the mounting bracket has a sliding groove that extends along the length of the adjusting screw, and a sliding block is formed at the bottom of the adjusting seat, which slides within the sliding groove. Attached Figure Description

[0016] Figure 1 The overall three-dimensional structure of this utility model Figure 1 .

[0017] Figure 2 The overall three-dimensional structure of this utility model Figure 2 .

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 The overall three-dimensional structure of this utility model Figure 3 .

[0020] Figure 5 for Figure 4 Enlarged view of section B in the middle.

[0021] Figure 6 This is a partial internal structural diagram of the present invention.

[0022] Among them, 1 is the base, 11 is the first through hole, 12 is the vertical frame, 13 is the lifting guide rail, 14 is the servo motor, 141 is the lifting screw, 2 is the lifting frame, 21 is the second through hole, 22 is the fixed seat, 221 is the fixing screw, 31 is the housing, 32 is the first partition plate, 33 is the second partition plate, 34 is the water cooling chamber, 35 is the water exchange chamber, 36 is the third through hole, 37 is the water inlet pipe, 38 is the water outlet pipe, 39 is the switch valve, 41 is the mounting bracket, 411 is the sliding groove, 42 is the adjusting seat, 421 is the sliding block, 43 is the air supply pipe, 44 is the adjusting screw, and 441 is the adjusting handwheel. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model 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," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] See appendix Figure 1 To be continued Figure 6 As shown, a water ring lifting device for a blown film machine includes a base 1, a lifting frame 2, and a water ring. The base 1 has a first through hole 11, and a vertical frame 12 is provided on the base 1. The vertical frame 12 is provided with a lifting guide rail 13 and a servo motor 14. The lifting frame 2 is slidably connected to the lifting guide rail 13. The servo motor 14 is connected to a lifting screw 141, which is threadedly connected to the lifting frame 2. The lifting frame 2 has a second through hole 21 that penetrates vertically through it. A water ring is provided on the lifting frame 2. A water cooling chamber 34 is formed inside the water ring. A third through hole 36 that penetrates vertically through the water ring is formed in the middle of the water cooling chamber 34. The third through hole 36, the second through hole 21, and the first through hole 11 are arranged opposite each other from top to bottom. The third through hole 36, the second through hole 21, and the first through hole 11 are respectively used for the film to pass through. The lifting screw 141 extends vertically.

[0026] In this embodiment, the water ring includes a shell 31, a first partition plate 32, and a second partition plate 33. Both the first partition plate 32 and the second partition plate 33 are annular structures. The first partition plate 32 and the second partition plate 33 are disposed inside the shell 31. The first partition plate 32 and the second partition plate 33 are disposed inside and outside the shell. A water exchange chamber 35 is formed between the first partition plate 32 and the inner sidewall of the shell 31. A water cooling chamber 34 is formed between the first partition plate 32 and the second partition plate 33. The water exchange chamber 35 is connected to the water cooling chamber 34. A third through hole 36 is formed in the second partition plate 33.

[0027] In this embodiment, an inlet pipe 37 and an outlet pipe 38 are respectively provided on the outer side wall of the housing 31. The inlet pipe 37 and the outlet pipe 38 are respectively connected to the water exchange chamber 35. A switch valve 39 is provided on both the inlet pipe 37 and the outlet pipe 38. The inlet pipe 37 and the outlet pipe 38 are arranged symmetrically on the left and right sides, which facilitates the input of cold water and the output of hot water.

[0028] Both the water-cooling chamber 34 and the water exchange chamber 35 have an annular structure.

[0029] In this embodiment, the lifting frame 2 is provided with multiple fixed seats 22, which are arranged in a ring on the outside of the housing 31. The fixed seats 22 are provided with fixing screws 221, which abut against and press against the housing 31.

[0030] An automatic gas filling device is installed on the lifting frame 2. The automatic gas filling device includes a mounting frame 41, an adjusting seat 42, and a gas filling pipe 43. The mounting frame 41 is installed on the lifting frame 2. An adjusting screw 44 is rotatably connected to the mounting frame 41. The adjusting screw 44 is set in the horizontal direction and is threadedly connected to the adjusting seat 42. The gas filling pipe 43 is installed on the adjusting seat 42. The gas filling pipe 43 is located above the water ring. By rotating the adjusting screw 44, the gas filling pipe 43 can be moved closer to or away from the water ring. An adjusting handwheel 441 is fitted on the adjusting screw 44.

[0031] In this embodiment, the mounting bracket 41 has a sliding groove 411 that extends along the length of the adjusting screw 44, and the bottom of the adjusting seat 42 has a sliding block 421 that slides within the sliding groove 411.

[0032] In this embodiment, the specific usage process is as follows: First, adjust the height position of the lifting frame 2 according to the actual situation. Then, start the servo motor 14, which drives the lifting screw 141 to rotate, thereby moving the lifting frame 2 and the water ring up and down until they reach the set position. Then, open the switch valve of the water inlet pipe 37 and supply water to the water exchange chamber 35 through the water inlet pipe 37. The water exchange chamber 35 supplies water to the water cooling chamber 34, so that the water in the water cooling chamber 34 surrounds the third through hole 36.

[0033] The blown film machine blows a thin film downwards. After the film bubble is output from the mold, it moves downwards and enters the third through hole 36 in this embodiment after passing through the air ring. At this time, the water in the water-cooling chamber 34 exchanges heat with the film bubble to cool it. After cooling, the film bubble continues to move downwards and passes through the second through hole 21 and the first through hole 11 in sequence to complete the cooling of the film bubble. When the film bubble is cooled, the diameter of the film bubble will change. At this time, a sensor is set in this embodiment. The sensor detects the fluctuation of the size of the film bubble. When the diameter of the film bubble changes, it will respond to the system to replenish it. The air supply pipe 43 adds or subtracts air to the film bubble to maintain the stability of the size of the film bubble.

[0034] It can also move the water ring up and down during the cooling process.

[0035] After a period of use, the water temperature in the water-cooled chamber 34 will rise, at which point the water in the water-cooled chamber 34 needs to be replaced. In this way, the valve 39 of the inlet pipe 37 and the outlet pipe 38 is opened simultaneously, the hot water in the water-cooled chamber 34 enters the water exchange chamber 35, and then is discharged through the outlet pipe 38. Cold water is introduced into the inlet pipe 37, and then the cold water is replenished to the water-cooled chamber 34 through the water exchange chamber 35.

[0036] By rotating the adjusting handwheel 441, the adjusting screw 44 is rotated, thereby causing the adjusting seat 42 to move closer to or away from the water ring and membrane bubble, and causing the air supply pipe 43 to move closer to or away from the water ring and membrane bubble, so as to accommodate membrane bubbles of different diameters.

[0037] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any person skilled in the art can make more possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from the content of the technical solution of this utility model should be covered within the protection scope of this utility model.

Claims

1. A water ring lifting device for a film blowing machine, comprising a base (1), a lifting frame (2), a water ring, characterized in that: The base (1) has a first through hole (11), and a vertical frame (12) is provided on the base (1). The vertical frame (12) is provided with a lifting guide rail (13) and a servo motor (14). The lifting frame (2) is slidably connected to the lifting guide rail (13). The servo motor (14) is connected to a lifting screw (141). The lifting screw (141) is threadedly connected to the lifting frame (2). The lifting frame (2) has a second through hole (21) that penetrates vertically through the lifting frame (2). The water ring is provided on the lifting frame (2). A water cooling chamber (34) is formed inside the water ring. A third through hole (36) that penetrates vertically through the water ring is formed in the middle of the water cooling chamber (34). The third through hole (36), the second through hole (21), and the first through hole (11) are opposite each other from top to bottom. The lifting frame (2) is equipped with an automatic gas filling device.

2. A water ring lifting device for a film blowing machine according to claim 1, characterized in that: The third through hole (36), the second through hole (21), and the first through hole (11) are respectively used for the film to pass through.

3. A water ring lifting device for a film blowing machine according to claim 1, characterized in that: The lifting screw (141) extends vertically.

4. A water ring lifting device for a film blowing machine according to claim 1, characterized in that: The water ring includes a shell (31), a first partition plate (32), and a second partition plate (33). The first partition plate (32) and the second partition plate (33) are both annular structures. The first partition plate (32) and the second partition plate (33) are disposed inside the shell (31). The first partition plate (32) and the second partition plate (33) are disposed inside and outside the shell. A water exchange chamber (35) is formed between the first partition plate (32) and the inner side wall of the shell (31). A water cooling chamber (34) is formed between the first partition plate (32) and the second partition plate (33). The water exchange chamber (35) is connected to the water cooling chamber (34). The third through hole (36) is formed inside the second partition plate (33).

5. A water ring lifting device for a film blowing machine according to claim 4, characterized in that: The outer wall of the shell (31) is provided with an inlet pipe (37) and an outlet pipe (38), and the inlet pipe (37) and the outlet pipe (38) are respectively connected to the water exchange chamber (35).

6. A water ring lifting device for a film blowing machine according to claim 5, characterized in that: Both the inlet pipe (37) and the outlet pipe (38) are equipped with switch valves (39).

7. A water ring lifting device for a film blowing machine according to claim 4, characterized in that: The lifting frame (2) is provided with multiple fixed seats (22), which are arranged in a ring on the outside of the housing (31). The fixed seats (22) are provided with fixing screws (221), which abut against the housing (31).

8. A water ring lifting device for a film blowing machine according to claim 1, characterized in that: The automatic gas filling device includes a mounting frame (41), an adjusting seat (42), and a gas filling pipe (43). The mounting frame (41) is mounted on the lifting frame (2). An adjusting screw (44) is rotatably connected to the mounting frame (41). The adjusting screw (44) is set in the horizontal direction and is threadedly connected to the adjusting seat (42). The adjusting seat (42) is provided with a gas filling pipe (43). The gas filling pipe (43) is located above the water ring. By rotating the adjusting screw (44), the gas filling pipe (43) can be moved closer to or away from the water ring.

9. A water ring lifting device for a film blowing machine according to claim 8, characterized in that: An adjusting handwheel (441) is fitted onto the adjusting screw (44).

10. A water ring lifting device for a film blowing machine according to claim 8, characterized in that: The mounting bracket (41) has a sliding groove (411) extending along the length of the adjusting screw (44). The bottom of the adjusting seat (42) has a sliding block (421) which slides within the sliding groove (411).

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