Device and method for eliminating air in steel coil coating of automatic packaging line

Abstract

The present invention discloses a device and method for eliminating air inside the film coating of steel coils in an automatic packaging line, and belongs to the technical field of cold-rolled steel coil packaging. The present invention includes an automatic packaging line body and a steel coil body, wherein the steel coil body is located inside the automatic packaging line body, and the automatic packaging line body includes a film coating component, a skin covering component, a circumferential bundling station, and a radial bundling station. In order to solve the problem that the surface of the steel coil is easily bulged during packaging, which affects the aesthetics of the subsequent bundling and the overall packaging quality, when the steel coil body is coated inside the film coating component, the pressure roller squeezes out most of the air between the plastic film and the steel coil, and then when the steel coil body is coated inside the skin covering component, the pressure plate diffuses the accumulated gas, thereby ensuring that the subsequent steel coil will not bulge, thereby improving the overall packaging quality of the steel coil.

Description

Technical Field

[0001] The present invention relates to the technical field of cold-rolled steel coil packaging, and in particular to a device and method for eliminating air in a steel coil coating on an automatic packaging line. Background Art

[0002] Steel coil, also known as coiled steel, is formed into coils by hot and cold pressing. In order to facilitate the storage and transportation of steel coils, the steel coils need to be packaged. The automatic steel coil packaging line is a packaging technology that has just emerged internationally in recent years. There are not many such production lines in the world, and even fewer similar production lines in China.

[0003] The existing automatic packaging method of steel coils requires that the through-winding laminating machine be coordinated with the rotating ground roller to complete the through-winding packaging of the steel coil with crepe paper and stretch plastic film, and then the outer guard plate covering machine be coordinated with the rotating ground roller with a supporting roller to complete the outer guard plate packaging of the steel coil. The outer guard plate of the corresponding material and width can be automatically selected for fixed-length transportation and cutting, and the centering is performed during the transportation of the sheared packaging material. The head and tail of the outer guard plate are automatically sprayed with hot melt adhesive to bond the guard plate. Finally, the corner guard installation station is manually assisted in the assembly of the corner guard, the circumferential bundling of the steel coil is completed at the circumferential bundling machine, and the radial bundling of the steel coil is completed at the radial bundling machine.

[0004] When the above method is used to package the steel coil, the entire steel coil is covered with plastic film, and the air tightness is good. However, when the plastic film is wrapped around the steel coil, air will be bound and accumulated between the plastic film and the steel coil, so that when the steel coil is covered, the air will gather together with the rotation and rolling of the rollers, resulting in bulging. There is a problem that the surface of the steel coil is easily bulged when it is packaged, affecting the appearance of the subsequent bundling packaging and the overall packaging quality; therefore, it does not meet the existing needs. In this regard, the present application proposes an air elimination device and method inside the steel coil covering film of an automatic packaging line. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for eliminating air in the film coating of steel coils in an automatic packaging line. When the steel coil body is coated inside the coating component, the pressure roller squeezes out most of the air between the plastic film and the steel coil. Then, when the steel coil body is coated inside the covering component, the pressure plate diffuses the accumulated gas, ensuring that the subsequent steel coils will not bulge, improving the overall packaging quality of the steel coils, and solving the problems in the prior art.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device for eliminating air inside the film coating of steel coils in an automatic packaging line, comprising an automatic packaging line body and a steel coil body, wherein the steel coil body is located inside the automatic packaging line body, the automatic packaging line body comprises a coating assembly, a skinning assembly, a circumferential bundling station and a radial bundling station, and the steel coil body passes through the coating assembly, the skinning assembly, the circumferential bundling station and the radial bundling station in sequence, the coating assembly comprises a slideway, a slider, a pressure roller and a plastic film, the plastic film is located on the surface of the steel coil body, the skinning assembly comprises a pressure plate and a galvanized steel sheet, and the galvanized steel sheet is located on the outer annular surface of the steel coil body.

[0007] Preferably, the slider is installed on a slide, the slide is located above the steel coil body, the slide passes through the center of the steel coil body, one end of the plastic film is connected to the slider, and the other end of the plastic film is connected to the steel coil body.

[0008] Preferably, a first roller is provided below the slide, a first fixed plate is provided on one side of the slide, first transmission rods are provided on both sides of the first fixed plate, a first cylinder is provided above the first fixed plate, one end of the first transmission rod is connected to the pressure roller shaft, the other end of the first transmission rod is connected to the first fixed plate shaft, the middle part of the first transmission rod is connected to the ejection end shaft of the first cylinder, and the steel coil body is located above the first roller.

[0009] Preferably, a second fixed plate is provided on one side of the pressure plate, a second roller is provided below the pressure plate, a second transmission rod and a second cylinder are provided on both sides of the second fixed plate, one end of the second transmission rod is connected to the pressure plate shaft, the other end of the second transmission rod is connected to the second fixed plate shaft, and the middle part of the second transmission rod is connected to the ejection end shaft of the second cylinder.

[0010] Preferably, the pressing plate includes an upper pressing plate and a lower pressing plate, a first groove is provided between the upper pressing plate and the lower pressing plate, and a second groove is provided on the surface of the upper pressing plate and the lower pressing plate facing the steel coil body.

[0011] A method for eliminating air in the film covering a steel coil in an automatic packaging line is implemented based on a device for eliminating air in the film covering a steel coil in an automatic packaging line, and includes the following steps:

[0012] Step 1: The coil body moves into the interior of the film covering assembly. The first roller continuously drives the steel coil body to rotate, while the slider moves along the slideway to continuously wrap the plastic film around the steel coil body.

[0013] Step 2: When the width of the film-coated portion of the steel coil body is equal to the sum of the widths of the four plastic films, the pressing roller presses the portion of the steel coil body covered with the plastic film. As the steel coil body rotates, the pressing roller squeezes out the air trapped in the plastic film.

[0014] Step 3: After the steel coil is coated, it is moved to the interior of the coating assembly. Hot melt adhesive is first applied to one side of the galvanized steel sheet. The second roller then rotates the steel coil to keep the galvanized steel sheet adhered to the plastic film on the outer layer of the steel coil.

[0015] Step 4: When the entire galvanized steel sheet is about to be attached to the steel coil body, the pressure plate is pressed on one end of the galvanized steel sheet. As the steel coil body rotates, the pressure plate is pressed on the other end of the galvanized steel sheet. At this time, the steel coil body continues to rotate 15 degrees. The pressure plate will diffuse the air gathered on the outer ring surface of the steel coil body toward the inner ring surface;

[0016] Step 5: After the steel coil body is covered, the steel coil body is first equipped with corner guards, then moved to the circumferential bundling station for circumferential bundling, and finally moved to the radial bundling station for radial bundling.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, when the steel coil body is covered with film inside the covering assembly, the pressure roller squeezes out most of the air between the plastic film and the steel coil. Then, when the steel coil body is covered with film inside the covering assembly, the pressure plate diffuses the accumulated gas from the outer ring surface of the steel coil body to the inner ring surface, ensuring that the steel coil will not bulge during the subsequent bundling operation, thereby improving the overall packaging quality of the steel coil.

[0019] 2. The present invention provides a layer of rubber on the surface of the pressure roller so that the pressure roller will not damage the plastic film when pressing on the steel coil body. At the same time, when the pressure roller presses down on the steel coil body, the width of the coated portion on the steel coil body is at least greater than the sum of the widths of four plastic films, thereby avoiding the adverse effects of the pressure roller on the coating operation. A first groove and a second groove are provided on the side of the pressure plate facing the steel coil body. The first groove and the second groove guide the diffusion of the gas gathered between the plastic film and the steel coil body. The shape design of the first groove and the second groove also ensures that the pressure plate will not scratch the steel coil body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the automatic packaging line of the present invention;

[0021] Figure 2 It is a schematic diagram of the partial structure of the film covering assembly of the present invention;

[0022] Figure 3 This is a schematic diagram of the partial structure of the cover assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the local structure of the pressing plate of the present invention.

[0024] In the figure: 1. Laminating assembly; 101. Slide; 102. Slider; 103. First roller; 104. Pressure roller; 105. First transmission rod; 106. First cylinder; 107. First fixed plate; 108. Plastic film; 2. Laminating assembly; 201. Second fixed plate; 202. Second cylinder; 203. Second transmission rod; 204. Pressure plate; 2041. First groove; 2042. Second groove; 205. Second roller; 206. Galvanized steel sheet; 3. Circumferential bundling station; 4. Radial bundling station; 5. Steel coil body; 6. Automatic packaging line body. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In order to solve the problem of bulging on the surface of steel coils during packaging, which affects the appearance of subsequent bundling and the overall packaging quality, please refer to Figure 1-4 , this embodiment provides the following technical solutions:

[0027] A device for eliminating air inside the film coating of steel coils in an automatic packaging line includes an automatic packaging line body 6 and a steel coil body 5. The steel coil body 5 is located inside the automatic packaging line body 6. The automatic packaging line body 6 includes a coating component 1, a covering component 2, a circumferential bundling station 3 and a radial bundling station 4. The steel coil body 5 passes through the coating component 1, the covering component 2, the circumferential bundling station 3 and the radial bundling station 4 in sequence. The coating component 1 includes a slide 101, a slider 102, a pressure roller 104 and a plastic film 108. The plastic film 108 is located on the surface of the steel coil body 5. The covering component 2 includes a pressure plate 204 and a galvanized steel sheet 206. The galvanized steel sheet 206 is located on the outer annular surface of the steel coil body 5.

[0028] Specifically, when the steel coil body 5 is being coated inside the coating component 1, the pressure roller 104 squeezes out most of the air between the plastic film 108 and the steel coil body 5; when the steel coil body 5 is being coated inside the covering component 2, the pressure plate 204 diffuses the accumulated gas from the outer ring surface of the steel coil body 5 toward the inner ring surface, ensuring that the steel coil body 5 will not bulge during the bundling operation, thereby further improving the overall packaging quality of the steel coil body 5.

[0029] The slider 102 is installed on the slide 101, which is located above the steel coil body 5. The slide 101 passes through the center of the steel coil body 5. One end of the plastic film 108 is connected to the slider 102, and the other end of the plastic film 108 is connected to the steel coil body 5.

[0030] Specifically, the slider 102 moves along the slide 101, so that the plastic film 108 is wrapped around the surface of the steel coil body 5. At the same time, the slider 102 tightens the plastic film 108 and wraps it around the steel coil body 5 when moving, reducing the gas trapped between the plastic film 108 and the steel coil body 5.

[0031] A first roller 103 is provided below the slide 101, a first fixed plate 107 is provided on one side of the slide 101, first transmission rods 105 are provided on both sides of the first fixed plate 107, a first cylinder 106 is provided above the first fixed plate 107, one end of the first transmission rod 105 is connected to the axis of the pressure roller 104, the other end of the first transmission rod 105 is connected to the axis of the first fixed plate 107, the middle part of the first transmission rod 105 is connected to the ejection end axis of the first cylinder 106, and the steel coil body 5 is located above the first roller 103.

[0032] Specifically, the pressure roller 104 is set at a distance from the steel coil body 5 approximately equal to the sum of the widths of two plastic films 108. After the first cylinder 106 is pushed out, the pressure roller 104 is firmly pressed on the steel coil body 5. A layer of rubber is provided on the surface of the pressure roller 104 so that the plastic film 108 will not be damaged when the pressure roller 104 is pressed on the steel coil body 5. The pressure roller 104 rotates with the steel coil body 5, ensuring that the pressure roller 104 squeezes out the gas without affecting the quality of the coating operation.

[0033] A second fixed plate 201 is provided on one side of the pressure plate 204, and a second roller 205 is provided below the pressure plate 204. A second transmission rod 203 and a second cylinder 202 are provided on both sides of the second fixed plate 201. One end of the second transmission rod 203 is connected to the axis of the pressure plate 204, and the other end of the second transmission rod 203 is connected to the axis of the second fixed plate 201. The middle part of the second transmission rod 203 is connected to the ejection end axis of the second cylinder 202. The pressure plate 204 includes an upper pressure plate and a lower pressure plate, and a first groove 2041 is provided between the upper pressure plate and the lower pressure plate, and a second groove 2042 is provided on the surfaces of the upper pressure plate and the lower pressure plate facing the steel coil body 5.

[0034] Specifically, the first groove 2041 and the second groove 2042 guide the diffusion of the gas gathered between the plastic film 108 and the steel coil body 5. The shape design of the first groove 2041 and the second groove 2042 also ensures that the pressure plate 204 will not scratch the steel coil body 5, thereby improving the aesthetics of subsequent packaging.

[0035] A method for eliminating air in the film covering a steel coil in an automatic packaging line is implemented based on a device for eliminating air in the film covering a steel coil in an automatic packaging line, and includes the following steps:

[0036] Step 1: The steel coil body 5 is moved into the interior of the film covering assembly 1. At this time, the pressure roller 104 is located approximately at a distance equal to the width of two plastic films 108 directly above the steel coil body 5. The first roller 103 continuously drives the steel coil body 5 to rotate. At the same time, the slider 102 moves along the slide 101 to continuously wrap the plastic film 108 around the steel coil body 5.

[0037] Step 2: As the steel coil body 5 rotates, when the width of the film-coated portion of the steel coil body 5 equals the sum of the widths of the four plastic films 108, the first cylinder 106 pushes out, causing the pressure roller 104 to press against the portion of the steel coil body 5 covered with the plastic films 108. Then, as the steel coil body 5 continues to rotate, the pressure roller 104 rotates with the steel coil body 5 and squeezes out the air trapped in the plastic films 108. The air passes through the gap between the plastic films 108 and the steel coil body 5, and is discharged into the atmosphere over a distance approximately equal to the sum of the widths of the two plastic films 108.

[0038] Step 3: After the steel coil body 5 is coated, it is moved to the interior of the coating assembly 2. Hot melt adhesive is first applied to one side of the galvanized steel sheet 206. The steel coil body 5 is then rotated by the second roller 205 so that the galvanized steel sheet 206 is continuously adhered to the plastic film 108 on the outer surface of the steel coil body 5.

[0039] Step 4: As the steel coil body 5 rotates, when the entire galvanized steel sheet 206 is about to be completely adhered to the steel coil body 5, the second cylinder 202 is pushed out so that the pressure plate 204 is pressed against the leading end of the galvanized steel sheet 206. As the steel coil body 5 continues to rotate, when the pressure plate 204 is pressed against the trailing end of the galvanized steel sheet 206, the steel coil body 5 continues to rotate about 10°-20°, so that the pressure plate 204 diffuses the air gathered on the outer annular surface of the steel coil body 5 toward the inner annular surface, thereby avoiding bulging on the surface of the steel coil body 5.

[0040] Step 5: After the steel coil body 5 is covered, the steel coil body 5 is first manually assembled with corner protectors, then moved to the circumferential bundling station 3 for circumferential bundling, and finally moved to the radial bundling station 4 for radial bundling.

[0041] Working principle: When the steel coil body 5 is covered inside the covering component 1, the pressure roller 104 squeezes out most of the air between the plastic film 108 and the steel coil body 5. Then, when the steel coil body 5 is covered inside the covering component 2, the pressure plate 204 diffuses the accumulated gas from the outer ring surface of the steel coil body 5 to the inner ring surface, ensuring that the steel coil body 5 will not bulge during the bundling operation, thereby improving the overall packaging quality of the steel coil body 5.

[0042] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An air elimination device for steel coil coating in an automatic packaging line, comprising an automatic packaging line body (6), characterized in that: It also includes a steel coil body (5), the steel coil body (5) is located inside the automatic packaging line body (6), the automatic packaging line body (6) includes a film covering component (1), a skin covering component (2), a circumferential bundling station (3) and a radial bundling station (4), the steel coil body (5) passes through the film covering component (1), the skin covering component (2), the circumferential bundling station (3) and the radial bundling station (4) in sequence, the film covering component (1) includes a slideway (101), a slider (102), a pressure roller (104) and a plastic film (108), the plastic film (108) is located on the surface of the steel coil body (5), the skin covering component (2) includes a pressure plate (204) and a galvanized steel sheet (206), and the galvanized steel sheet (206) is located on the outer annular surface of the steel coil body (5); A second fixed plate (201) is provided on one side of the pressing plate (204), a second roller (205) is provided below the pressing plate (204), a second transmission rod (203) and a second cylinder (202) are provided on both sides of the second fixed plate (201), one end of the second transmission rod (203) is connected to the axis of the pressing plate (204), the other end of the second transmission rod (203) is connected to the axis of the second fixed plate (201), and the middle part of the second transmission rod (203) is connected to the ejection end axis of the second cylinder (202); the pressing plate (204) includes an upper pressing plate and a lower pressing plate, a first groove (2041) is provided between the upper pressing plate and the lower pressing plate, and a second groove (2042) is provided on the surface of the upper pressing plate and the lower pressing plate facing the steel coil body (5).

2. The device for eliminating air inside the steel coil coating of an automatic packaging line according to claim 1, characterized in that: The slider (102) is mounted on a slideway (101), the slideway (101) is located above the steel coil body (5), and the slideway (101) passes through the center of the steel coil body (5). One end of the plastic film (108) is connected to the slider (102), and the other end of the plastic film (108) is connected to the steel coil body (5).

3. The device for eliminating air inside the steel coil coating of an automatic packaging line according to claim 1, characterized in that: A first roller (103) is provided below the slideway (101), a first fixed plate (107) is provided on one side of the slideway (101), first transmission rods (105) are provided on both sides of the first fixed plate (107), a first cylinder (106) is provided above the first fixed plate (107), one end of the first transmission rod (105) is connected to the shaft of the pressure roller (104), the other end of the first transmission rod (105) is connected to the shaft of the first fixed plate (107), the middle part of the first transmission rod (105) is connected to the ejection end shaft of the first cylinder (106), and the steel coil body (5) is located above the first roller (103).

4. A method for eliminating air from the coating of steel coils in an automatic packaging line, implemented based on the device for eliminating air from the coating of steel coils in an automatic packaging line according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: The steel coil body (5) is moved to the interior of the film covering assembly (1), and the first roller (103) continuously drives the steel coil body (5) to rotate, while the slider (102) moves along the slideway (101) to continuously wrap the plastic film (108) around the steel coil body (5); Step 2: When the width of the film-coated portion of the steel coil body (5) is equal to the sum of the widths of the four plastic films (108), the pressing roller (104) presses the portion of the steel coil body (5) covered with the plastic film (108), and as the steel coil body (5) rotates, the pressing roller (104) squeezes out the air trapped in the plastic film (108); Step 3: After the steel coil body (5) is coated, it is moved to the inside of the coating component (2), and hot melt adhesive is first applied to one side of the galvanized steel sheet (206). Then, the steel coil body (5) is driven to rotate by the second roller (205), so that the galvanized steel sheet (206) is continuously adhered to the plastic film (108) on the outer layer of the steel coil body (5); Step 4: When the entire galvanized steel sheet (206) is about to be completely attached to the steel coil body (5), the pressing plate (204) is pressed on one end of the galvanized steel sheet (206). As the steel coil body (5) rotates, the pressing plate (204) is pressed on the other end of the galvanized steel sheet (206). At this time, the steel coil body (5) continues to rotate 15°, and the pressing plate (204) diffuses the air gathered on the outer annular surface of the steel coil body (5) toward the inner annular surface; Step 5: After the steel coil body (5) is covered, the steel coil body (5) is first assembled with corner guards, then moved to the circumferential bundling station (3) for circumferential bundling, and finally moved to the radial bundling station (4) for radial bundling.

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