Compression roller for exhaust of packaging bag

Abstract

The utility model relates to the technical field of packaging bag processing equipment, in particular to a compression roller for exhaust of a packaging bag, which is characterized in that in the process of exhausting the long packaging bag, two ends of the packaging bag are respectively rolled and compacted by a rolling sleeve, and the packaging bag at an annular groove is not compacted, so that an exhaust channel with a proper size is formed in the packaging bag, and the packaging bag can be exhausted. And it is ensured that in the exhaust process, the space in the packaging bag is communicated with the atmospheric environment for real-time exhaust, then gas in the packaging bag between the two rolling sleeves can be exhausted from the multiple exhaust channels, the situation that the packaging bag expands in the exhaust process is avoided, and the flatness of the packaging bag is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bag processing equipment, in particular to a pressure roller for exhausting packaging bags. Background Art

[0002] In the production process of packaging bags, it is usually necessary to exhaust the air in the packaging bags for easy storage and transportation. The commonly used exhaust method is to exhaust the gas from the opening at one end of the packaging bag by rolling.

[0003] Patent CN205499533U discloses a roller rolling method. In this patent, when the belt moves synchronously with the pulley, the packaging bag on the belt horizontal plane moves with the belt and passes under the exhaust roller. A certain squeezing force will be generated between the packaging bag and the exhaust roller, thereby generating a certain friction between the packaging bag and the exhaust roller. Under the action of their own gravity, the two exhaust rollers roll the packaging bag multiple times to remove the gas in the packaging bag and improve the flatness of the packaging bag. Although the above-mentioned prior art can exhaust the air in the packaging bag, when the packaging bag is long, after the front end of the packaging bag passes through the first exhaust roller, a little air will enter the front end of the packaging bag during the process of moving to the second exhaust roller; when the front end of the packaging bag is pressed tightly under the second exhaust roller, the rear end of the packaging bag is still pressed tightly under the first exhaust roller. At this time, the part of the packaging bag located between the two exhaust rollers will expand due to the entering little air, resulting in a discount in the flatness effect after the first exhaust roller is rolled; at the same time, the expanded packaging bag may be wrinkled when rolled by the second exhaust roller, resulting in a reduction in the flatness of the packaging bag. Therefore, a device that can solve this problem is urgently needed. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a pressure roller for packaging bag exhaust. The utility model can quickly exhaust the residual gas in the packaging bag between two rollers, effectively avoid the expansion of the packaging bag during the exhaust process, and thus improve the flatness of the packaging bag.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pressure roller for venting packaging bags comprises a roller rotatably mounted above a conveyor belt, a rolling sleeve coaxially sleeved on the outer side of the roller for rolling and venting packaging bags, and a plurality of annular grooves coaxially provided on the outer wall of the rolling sleeve for rolling the packaging bags so that gas can be discharged from the annular grooves when the rolling sleeve rolls the packaging bags.

[0007] As a further solution of the utility model: the rolling sleeve includes a plurality of sleeves, each sleeve is axially spliced ​​in sequence to form the rolling sleeve, and a plurality of annular grooves are coaxially opened on the outer wall of each sleeve.

[0008] As a further solution of the utility model: the roller includes a rotating shaft horizontally arranged on a bracket at the conveyor belt, the middle section of the rotating shaft is a bare rod section, and both shaft ends are provided with external threads; two locking sleeves are installed on the rotating shaft through threaded connections to press each pipe sleeve together from both ends of the rotating shaft.

[0009] As a further solution of the utility model: a limiting groove is provided on the rotating shaft, the groove length direction of the limiting groove is parallel to the axial direction of the rotating shaft, and a positioning pin is installed on the inner wall surface of the sleeve, which can be slidably inserted in the limiting groove and engaged with the limiting groove to circumferentially lock the sleeve.

[0010] As a further solution of the utility model: there are two limit grooves, and the two limit grooves are arranged axially symmetrically with respect to the axis of the rotary shaft.

[0011] As a further solution of the utility model: positioning shafts are coaxially installed on both ends of the rotary shaft, bearings are installed on the positioning shafts, and the bearings are installed on the bracket.

[0012] As a further solution of the utility model: the outer diameter of the bearing is smaller than the minimum distance between the bottoms of the two grooves.

[0013] As a further solution of the utility model: each annular groove is evenly distributed on the sleeve in sequence along the axial direction of the corresponding sleeve.

[0014] As a further solution of the utility model: an anti-slip groove for increasing the tightening friction force is provided on the outer wall surface of the lock sleeve.

[0015] As a further solution of the utility model: the anti-slip grooves are evenly arranged in sequence along the circumference of the lock sleeve.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. In the process of exhausting a long packaging bag, the two ends of the packaging bag are respectively rolled and compacted by the roller sleeve, while the packaging bag at the annular groove is not compacted, thereby forming an exhaust channel of suitable size in the packaging bag, ensuring that in the process of exhausting, the space in the packaging bag is connected to the atmospheric environment and exhausted in real time, and then the gas in the packaging bag between the two roller sleeves is discharged from multiple exhaust channels, avoiding the expansion of the packaging bag in the process of exhausting, and ensuring the flatness of the packaging bag.

[0018] 2. The arrangement of multiple sleeves in the utility model can realize exhaust by replacing different numbers of sleeves according to the actual bag width of the packaging bag.

[0019] 3. The limit groove and positioning pin provided in the utility model can prevent the sleeve from slipping and improve the stability of the sleeve installation.

[0020] 4. The purpose of the outer diameter of the bearing of the utility model being smaller than the minimum distance between the two limit grooves is to enable the sleeve to be replaced safely and quickly without removing the bearing, thereby improving the efficiency of replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a schematic diagram of the split structure of the utility model.

[0023] In the figure: 1, roller; 11, rotating shaft; 111, external thread; 112, limiting groove; 113, positioning shaft; 114, bearing; 2, rolling sleeve; 21, sleeve; 211, annular groove; 212, positioning pin; 3, locking sleeve; 31, anti-slip groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-2 In the embodiment of the utility model, a pressure roller for exhausting packaging bags includes a roller 1, and the roller 1 includes a rotating shaft 11 arranged horizontally on a bracket at the conveyor belt. The middle section of the rotating shaft 11 is a bare rod section, and both ends of the shaft are provided with external threads 111. Two locking sleeves 3 are installed on the rotating shaft through threaded connection to press each sleeve together from both ends of the rotating shaft. Two limiting grooves 112 are provided on the rotating shaft 11, and the two limiting grooves 112 are arranged symmetrically with the axis of the rotating shaft 11, and the groove length direction of the two limiting grooves 112 is parallel to the axial direction of the rotating shaft 11. The two ends of the rotating shaft 11 are coaxially installed with a positioning shaft 113, and the positioning shaft 113 is installed with a bearing 114, and the bearing 114 is installed on the bracket in the patent CN205499533U, that is, the exhaust roller in the patent CN205499533U is replaced by the utility model, and other structures remain unchanged, and the utility model is used to exhaust longer packaging bags.

[0026] The outer side of the roller 1 is coaxially sleeved with a roller sleeve 2 that can roll and exhaust the packaging bag. The roller sleeve 2 includes a plurality of sleeves 21, and each sleeve 21 is axially spliced ​​in sequence to form the roller sleeve 2. A plurality of annular grooves 211 are coaxially opened on the outer wall of each sleeve 21, and each annular groove 211 is uniformly distributed on the sleeve 21 in sequence along the axial direction of the corresponding sleeve 21. The depth and width of the annular groove 211 can be set according to the actual situation during use. Generally speaking, the width is about 3-5mm and the depth is 3-5mm. The number of annular grooves 211 pressed on the packaging bag at the same time is 5. Such a size and quantity setting can effectively exhaust the air in the packaging bag without damaging the packaging bag.

[0027] During use, under the action of the anti-slip groove 31, unscrew the locking sleeves 3 at both ends of the rotating shaft 11, remove each sleeve 21, and then replace the appropriate sleeve 21 as required, then tighten the locking sleeves 3 at both ends of the rotating shaft 11, and then install the rotating shaft 11 on the bracket in patent CN205499533U to start working. The longer packaging bag moves with the conveyor belt to the first rolling sleeve 2, and the tube sleeve begins to roll it. After rolling, the packaging bag will open slightly, which will allow some air to re-enter the packaging bag, resulting in residual air in the packaging bag. The packaging bag then enters the second rolling sleeve 2, and the tube sleeve begins to roll it.

[0028] During the exhaust process, the two ends of the packaging bag are rolled and compacted by the rolling sleeve 2, while the packaging bag at the annular groove 211 is not compacted, thereby forming an exhaust channel of suitable size in the packaging bag. This channel will not cause the packaging bag to deform, and the gas in the packaging bag between the two rolling sleeves 2 will be discharged from multiple exhaust channels, ensuring that during the exhaust process, the space inside the packaging bag is connected to the atmospheric environment, and then the exhaust is carried out in real time, effectively avoiding the expansion of the packaging bag during the exhaust process, not damaging the packaging bag, and effectively improving the flatness of the packaging bag. After two rollings, the packaging bag becomes flatter, and the inside of the packaging bag is further compressed, and the air inside is exhausted as much as possible.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure roller for venting packaging bags, characterized in that: The invention comprises a roller (1) rotatably mounted above a conveyor belt, wherein a roller sleeve (2) is coaxially sleeved on the outer side of the roller (1) and can roll and exhaust the packaging bag, and a plurality of annular grooves (211) are coaxially opened on the outer wall of the roller sleeve (2) for rolling the packaging bag, so that the gas can be exhausted from the annular grooves (211) when the roller sleeve (2) rolls the packaging bag.

2. A pressure roller for venting packaging bags according to claim 1, characterized in that: The rolling sleeve (2) comprises a plurality of sleeves (21), each sleeve (21) being axially spliced ​​in sequence to form the rolling sleeve (2), and a plurality of annular grooves (211) are coaxially formed on the outer wall of each sleeve (21).

3. A pressure roller for venting packaging bags according to claim 2, characterized in that: The roller (1) comprises a rotating shaft (11) which is arranged on a bracket at the conveyor belt for horizontal rotation; the middle section of the rotating shaft (11) is a bare rod section, and both ends of the shaft are provided with external threads (111); two locking sleeves (3) are installed on the rotating shaft through threaded connection to press the respective sleeves together from both ends of the rotating shaft.

4. A pressure roller for venting packaging bags according to claim 3, characterized in that: A limiting groove (112) is provided on the rotary shaft (11), the groove length direction of the limiting groove (112) is parallel to the axial direction of the rotary shaft (11), and a positioning pin (212) is installed on the inner wall surface of the sleeve (21) and can be slidably inserted in the limiting groove (112) and is engaged with the limiting groove (112) to circumferentially lock the sleeve (21).

5. A pressure roller for venting packaging bags according to claim 4, characterized in that: There are two limit grooves (112), and the two limit grooves (112) are arranged symmetrically about the axis of the rotary shaft (11).

6. A pressure roller for venting packaging bags according to claim 5, characterized in that: The two shaft ends of the rotary shaft (11) are coaxially mounted with positioning shafts (113), the positioning shafts (113) are mounted with bearings (114), and the bearings (114) are mounted on the bracket.

7. A pressure roller for venting packaging bags according to claim 6, characterized in that: The outer diameter of the bearing (114) is smaller than the minimum distance between the bottoms of the two grooves.

8. A pressure roller for venting packaging bags according to claim 7, characterized in that: Each annular groove (211) is evenly distributed on the sleeve (21) in sequence along the axial direction of the corresponding sleeve (21).

9. The pressure roller for venting packaging bags according to claim 3, characterized in that: An anti-slip groove (31) for increasing the tightening friction force is provided on the outer wall surface of the lock sleeve (3).

10. A pressure roller for venting packaging bags according to claim 9, characterized in that: The anti-slip grooves (31) are evenly arranged in sequence along the circumference of the lock sleeve (3).

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