A manufacturing process for an air column bag

Abstract

This invention discloses a manufacturing process for an air column bag, belonging to the field of packaging technology, aiming to solve the problem that air column bags cannot tightly wrap fruit. The key technical points are: it includes an inner sheet, an outer sheet, and an air valve membrane. The air valve membrane is located at the connection between the inner and outer sheets. The outer sheet has symmetrical folding grooves, and a connecting piece is fixedly connected to it. The side of the connecting piece abuts against the folding grooves. The outer sheet has two symmetrical cavities about the folding grooves. The sides of the inner and outer sheets are fixedly connected to each other, and the connecting piece is located at the center of the outer sheet. This invention uses channels to support the two cavities, naturally supporting the outer sheet and causing it to fold. The more air is inflated, the tighter the fit between the two, allowing the item to be wrapped between the inner sheets. Then, tape or other materials can be used to fix the sides of the outer sheet, ensuring the item is completely wrapped by the air column bag.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, and more specifically, to a process for manufacturing an air column bag. Background Technology

[0002] Air column bags, also known as cushioning air column bags or inflatable bags, are a new type of packaging material that uses natural air to fill the packaging. They are currently the most economical and environmentally friendly cushioning packaging material. Air column bags are mainly made of plastic film, and each air bladder in a cushioning air column bag is an independent cushioning chamber with extremely strong cushioning properties. Therefore, they are often used to protect fruits during long-distance transportation.

[0003] In the traditional process of packaging fruit, air column bags are often inflated and wrapped around the outside of the fruit, with the ends of the bag sealed together to cover the fruit. However, since fruit is generally round and smooth, it is easy for it to slip out from the openings on both sides of the air column bag, thus negating its cushioning effect on the fruit.

[0004] Therefore, an air column bag, a type of packaging bag, was developed. Fruit is placed into the air column bag through its opening, and then the opening is closed. This air column bag is usually made in advance, but the size of the fruit varies. When smaller fruits are placed in the air column bag, there is space inside, which causes the fruit to collide with the air column bag during transportation, making the fruit relatively easy to damage.

[0005] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a manufacturing process for an air column bag, which has the advantage of being able to tightly wrap fruit.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an air column bag, comprising an inner sheet, an outer sheet, and an air valve membrane, wherein the air valve membrane is disposed at the connection between the inner sheet and the outer sheet, the outer sheet has symmetrical folding grooves, a connecting piece is fixedly connected to the outer sheet, the side of the connecting piece abuts against the folding grooves, the outer sheet has two cavities symmetrical about the folding grooves, the side of the inner sheet and the outer sheet are fixedly connected to each other, the connecting piece is disposed at the center of the outer sheet, and there are several channels between the connecting piece and the outer sheet, the channels being parallel to the long side of the outer sheet;

[0008] A process for preparing an air column bag includes the following steps in sequence:

[0009] S1. The outer piece is cut into symmetrical folding grooves using an air column bag making machine;

[0010] S2. A connecting piece is fixed to the outer sheet by hot pressing, and a channel is left between the connecting piece and the outer sheet;

[0011] S3. Transport the outer piece with the connecting piece to the air column bag making machine, and press the outer piece with the connecting piece to obtain two cavities.

[0012] S4. Transport the inner sheet and the valve membrane to the top of the outer sheet for hot pressing to obtain an air column bag.

[0013] The present invention is further configured such that: the air column bag making machine includes a frame, and the frame is provided with a first hot pressing part for connecting the connecting piece and the outer piece, a pressing part for pressing the outer piece, and a second hot pressing part for connecting the outer piece and the inner piece and the air valve membrane, wherein the first hot pressing part, the pressing part and the second hot pressing part are arranged in sequence according to the production steps.

[0014] The present invention is further configured such that: the first hot pressing section includes a plurality of roller groups, a conveyor belt, and a hot pressing plate; the plurality of roller groups are rotatably connected to the frame and arranged sequentially in a vertical order; the connecting piece is slidably connected to the roller group near the upper part; the outer piece is slidably connected to the roller group near the lower part; the conveyor belt is slidably connected to the frame; the hot pressing plate is slidably connected to the top of the conveyor belt via a cylinder; the cylinder is fixedly connected to the frame; and symmetrical cutting blades are fixedly connected to the side of the hot pressing plate, with the cutting blades located on the central axis of the hot pressing plate.

[0015] The present invention is further configured such that: a plurality of grooves are provided on the hot press plate, the grooves being equal in length to the long side of the connecting piece, and a heating element is provided on the side of the hot press plate near the top of the groove.

[0016] The present invention is further configured such that: a plurality of protrusions with the same length and width as the groove are fixedly connected to the conveyor belt.

[0017] The present invention is further configured such that: the pressing part includes a second conveyor belt and a pressing block, the pressing block is slidably connected to the frame by a second cylinder, the second conveyor belt is provided with a through groove, and two protrusions are fixedly connected to the pressing block, the protrusions being slidably connected in the through groove.

[0018] The present invention is further configured such that a second heating element is provided on the side wall of the protrusion.

[0019] The present invention is further configured such that: the second hot pressing section includes a conveyor belt three, a hot pressing plate two, and a roller group two, the roller group two is rotatably connected to the top of the frame, the hot pressing plate two is slidably connected to the top of the frame through a cylinder three, a groove two is provided on the hot pressing plate two, and a heating element three is provided in the hot pressing plate two near the top of the groove two.

[0020] In summary, the present invention has the following beneficial effects:

[0021] The two cavities are supported by the channels, and the outer sheet will be naturally supported by the channels, thus folding the outer sheet. The more air is inflated, the tighter the two fit together, so that the item is wrapped between the inner sheets. Then, tape or other materials can be used to fix the sides of the outer sheet so that the item is completely wrapped around the air column bag. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of an air column bag;

[0023] Figure 2 Schematic diagram of the internal structure of an air column bag Figure 1 ;

[0024] Figure 3 Schematic diagram of the internal structure of an air column bag Figure 2 ;

[0025] Figure 4 This is a schematic diagram of an air column bag making machine.

[0026] Figure 5 Cross-section of an air column bag making machine Figure 1 ;

[0027] Figure 6 Cross-section of an air column bag making machine Figure 2 .

[0028] In the diagram: 11. Inner sheet; 12. Outer sheet; 13. Valve diaphragm; 14. Cavity; 15. Connecting piece; 16. Channel; 17. Folding groove; 31. Frame; 41. Roller assembly one; 42. Conveyor belt one; 43. Hot press plate one; 44. Cylinder one; 45. Cutting knife; 51. Groove one; 52. Heating element one; 61. Raised strip; 71. Conveyor belt two; 72. Pressing block; 73. Cylinder two; 74. Through groove; 75. Raised block; 81. Heating element two; 91. Conveyor belt three; 92. Hot press plate two; 93. Roller assembly two; 94. Cylinder three; 95. Groove two; 96. Heating element three. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0030] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] An air column bag, such as Figures 1-3 As shown, it includes an inner sheet 11, an outer sheet 12, and a valve diaphragm 13. The valve diaphragm 13 is disposed at the connection between the inner sheet 11 and the outer sheet 12. The outer sheet 12 has symmetrical folding grooves 17. A connecting piece 15 is fixedly connected to the outer sheet 12. The side of the connecting piece 15 abuts against the folding grooves 17. The outer sheet 12 has two symmetrical cavities 14 about the folding grooves 17. The sides of the inner sheet 11 and the outer sheet 12 are fixedly connected to each other. The connecting piece 15 is disposed at the center of the outer sheet 12. There are several channels 16 between the connecting piece 15 and the outer sheet 12. The channels 16 are parallel to the long side of the outer sheet 12.

[0033] When packaging items, place the items on the surface of the inner sheet 11, and then inflate from the air valve membrane 13 to fill the cavity 14 with gas. The gas then fills the channel 16, causing the channel 16 to support the two cavities 14. The outer sheet 12 will be naturally supported by the channel 16, thus folding the outer sheet 12. The more gas is inflated, the tighter the two fit together, so that the items are wrapped between the inner sheets 11. Then, tape or other materials can be used to fix the sides of the outer sheet 12 so that the items are completely wrapped by the air column bag.

[0034] A process for preparing an air column bag includes the following steps in sequence:

[0035] S1. The outer piece 12 is fed into the air column bag making machine. The air column bag making machine cuts the two sides of the outer piece 12 laterally, thus forming two symmetrical folding grooves 17.

[0036] S2. A connecting piece 15 is fixed on the outer piece 12 by hot pressing, and a channel 16 is left between the connecting piece 15 and the outer piece 12. The two ends of the channel 16 are connected to the outside. The channel 16 and the cutting groove are parallel to each other.

[0037] S3. Transport the outer piece 12 with connecting piece 15 to the air column bag making machine, and press the outer piece 12 with connecting piece 15 to form two cavities 14. The two cavities 14 are symmetrical to each other. During the pressing process, the cutting groove of the outer piece 12 turns and fits against the inner wall of the outer piece 12, thereby forming a closed cavity 14.

[0038] S4. Transport the inner sheet 11 and the valve membrane 13 to the top of the outer sheet 12 for hot pressing to obtain an air column bag.

[0039] like Figures 4-6 As shown, the air column bag making machine includes a frame 31. The frame 31 is provided with a first hot pressing part for connecting the connecting piece 15 and the outer piece 12, a pressing part for pressing the outer piece 12, and a second hot pressing part for connecting the outer piece 12, the inner piece 11, and the air valve membrane 13. The first hot pressing part, the pressing part, and the second hot pressing part are arranged in sequence according to the production steps. The first hot pressing part can connect the outer piece 12 and the connecting piece 15 and form a channel 16 between the outer piece 12 and the connecting piece 15. The pressing part can press out two cavities 14 on the outer piece 12 for inflation. Finally, the second hot pressing part can connect the inner piece 11, the air valve membrane 13, and the outer piece 12 to obtain an air column bag. The whole process is convenient to operate and enables the smooth production of air column bags.

[0040] like Figures 4-6 As shown, the first hot pressing section includes several roller groups 41, a conveyor belt 42, and a hot pressing plate 43. The roller groups 41 are rotatably connected to the frame 31 and arranged vertically. The connecting piece 15 is slidably connected to the upper roller group 41, and the outer piece 12 is slidably connected to the lower roller group 41. The conveyor belt 42 is slidably connected to the frame 31, and the hot pressing plate 43 is slidably connected to the top of the conveyor belt 42 via a cylinder 44. The outer piece 12 and the connecting piece 15 can be transported sequentially to the conveyor belt 43 via the rollers. On 42, the connecting piece 15 is a rectangle formed by pre-cutting. The size of the connecting piece 15 is smaller than that of the outer piece 12. The connecting piece 15 is located at the center of the outer piece 12. The cylinder 44 is fixedly connected to the frame 31. Symmetrical cutting blades 45 are fixedly connected to the side of the hot press plate 43. The cutting blades 45 are located on the central axis of the hot press plate 43. The piston on the cylinder 44 can push the hot press plate 43 to move closer to the conveyor belt 42. After it comes into contact with the connecting piece 15, the cutting blades 45 cut the outer piece 12 to obtain a cutting groove.

[0041] like Figures 4-6 As shown, the hot press plate 43 has several grooves 51, the length of which is equal to the length of the long side of the connecting piece 15. A heating element 52 is provided on the side of the hot press plate 43 near the top of the groove 51. No heating element 52 is provided in the groove 51. Therefore, the connecting piece 15 and the outer piece 12 are not subjected to heat pressure when located in the groove 51. Several protrusions 61 with the same length and width as the groove 51 are fixedly connected to the conveyor belt 42. During the heat pressing process, the protrusions 61 can lift the connecting piece 15 and the outer piece 12 and insert them into the groove 51, thereby making the resulting channel 16 wider. When inflated, the channel 16 can become fuller.

[0042] like Figures 4-6 As shown, the pressing part includes a second conveyor belt 71 and a pressing block 72. The pressing block 72 is slidably connected to the frame 31 via a second cylinder 73. A through groove 74 is provided on the second conveyor belt 71. Two protrusions 75 are fixedly connected to the pressing block 72. The protrusions 75 are slidably connected in the through groove 74. The protrusions 75 press the two sides of the cutting groove on the outer piece 12, causing the outer piece 12 to fold at the cutting groove to form a cavity 14. A second heating element 81 is provided on the side wall of the protrusion 75. During the pressing process, the outer piece 12 wraps around the protrusion 75. The second heating element 81 heats and melts the folded outer piece 12, causing them to stick together, thereby obtaining a cavity 14 that protrudes to one side.

[0043] like Figures 4-6 As shown, the second hot pressing section includes a conveyor belt 3 91, a hot pressing plate 2 92, and a roller assembly 2 93. The roller assembly 2 93 is rotatably connected to the top of the frame 31. The hot pressing plate 2 92 is slidably connected to the top of the frame 31 via a cylinder 3 94. A groove 2 95 is provided on the hot pressing plate 2 92. The roller assembly 2 93 transports the pre-connected air valve diaphragm 13 and inner sheet 11 to the outer sheet 12 on the conveyor belt 3 91. The cylinder 3 94 controls the hot pressing plate 2 92 to press against the top of the inner sheet 11. A heating element 3 96 is provided in the hot pressing plate 2 92 near the top of the groove 2 95, that is, the heating element 3 96 is provided on the outer ring of the hot pressing plate 2 92. Therefore, the heating element 3 96 can heat-press the inner sheet 11 and the outer sheet 12 together, thereby completing the production of the air column bag.

[0044] The air column bag making machine is used as follows under normal conditions:

[0045] The outer sheet 12 and the connecting piece 15 are transported sequentially to conveyor belt 42. Then, the two are heat-pressed and bonded together using hot press plate 43. At the same time, the outer sheet 12 and the connecting piece 15 are pushed into the groove 51 by the protrusion 61, thus forming the channel 16. Then, the outer sheet 12 and the connecting piece 15 are transported to conveyor belt 71. After being sent to the bottom of the pressing block 72, conveyor belt 71 stops transporting and cylinder 73 is activated to press the pressing block 72 to press the outer sheet 12 to obtain two cavities 14. Then, conveyor belt 71 transports the outer sheet 12 to conveyor belt 91. After that, conveyor belt 91 carries the outer sheet 12 to the top of the outer sheet 12. Cylinder 94 is activated to fix the periphery of the inner sheet 11 and the outer sheet 12 with hot press plate 92, thus obtaining the air column bag.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A manufacturing process for an air column bag, the air column bag comprising an inner sheet (11), an outer sheet (12), and an air valve membrane (13), wherein the air valve membrane (13) is disposed at the connection between the inner sheet (11) and the outer sheet (12), characterized in that: The outer piece (12) has symmetrical folding grooves (17), and a connecting piece (15) is fixedly connected to the outer piece (12). The side of the connecting piece (15) abuts against the folding grooves (17). The outer piece (12) has two symmetrical cavities (14) about the folding grooves (17). The top surfaces of the inner piece (11) and the side of the outer piece (12) are fixedly connected to each other. The connecting piece (15) is located at the center of the outer piece (12). There are several channels (16) between the connecting piece (15) and the outer piece (12). The channels (16) are parallel to the long side of the outer piece (12). The manufacturing process of this air column bag includes the following steps in sequence: S1. Cut the outer piece (12) into symmetrical folding grooves (17) using an air column bag making machine. The air column bag making machine includes a frame (31), on which are provided a first hot pressing part for connecting the connecting piece (15) and the outer piece (12), a pressing part for pressing the outer piece (12), and a second hot pressing part for connecting the outer piece (12) and the inner piece (11) and the air valve membrane (13). The first hot pressing part, the pressing part and the second hot pressing part are arranged in sequence according to the production steps. The pressing part includes a second conveyor belt (71) and a pressing block (72). The pressing block (72) is slidably connected to the frame (31) via a second cylinder (73). The second conveyor belt (71) has two mutually symmetrical through slots (74). There is a connecting part between the two through slots for placing the outer piece. The pressing block (72) has two protrusions (75) fixedly connected to it. The protrusions (75) are slidably connected in the through slots (74). Heating elements (81) are provided on the four side walls of the protrusion (75); S2. A connecting piece (15) is fixed on the outer piece (12) by hot pressing, and a channel (16) is left between the connecting piece (15) and the outer piece (12). S3. Transport the outer piece (12) with the connecting piece (15) to the second conveyor belt (71). At this time, the outer piece (12) is laid flat on the surface of the through groove (74). Then, start the second cylinder (73) to push the protrusion (75) into the inside of the through groove (74), so that the two sides of the outer piece (12) move downward. Since there is a connecting part between the two through grooves (74), the center of the outer piece (12) can drive the connecting piece (15) to rest on the connecting part, so that the two sides of the outer piece (12) move downward. There is a second heating element (81) around the protrusion (75), so that the outer pieces (12) folded together can be heated and stuck together, thereby forming two cavities (14). S4. Transport the inner sheet (11) and the valve membrane (13) to the top of the outer sheet (12) for hot pressing to obtain an air column bag.

2. The manufacturing process of an air column bag according to claim 1, characterized in that: The first hot pressing section includes several roller groups (41), a conveyor belt (42), and a hot pressing plate (43). The roller groups (41) are rotatably connected to the frame (31) and arranged vertically. The connecting piece (15) is slidably connected to the roller group (41) near the upper part. The outer piece (12) is slidably connected to the roller group (41) near the lower part. The conveyor belt (42) is slidably connected to the frame (31). The hot pressing plate (43) is slidably connected to the top of the conveyor belt (42) through a cylinder (44). The cylinder (44) is fixedly connected to the frame (31). Symmetrical cutting blades (45) are fixedly connected to the side of the hot pressing plate (43). The cutting blades (45) are located on the central axis of the hot pressing plate (43).

3. The manufacturing process of an air column bag according to claim 2, characterized in that: The hot press plate (43) has several grooves (51) with the same length as the long side of the connecting piece (15). A heating element (52) is provided on the side of the hot press plate (43) near the top of the groove (51).

4. The manufacturing process of an air column bag according to claim 3, characterized in that: Several protrusions (61) with the same length and width as the groove (51) are fixedly connected to the conveyor belt (42).

5. The manufacturing process of an air column bag according to claim 1, characterized in that: The second hot pressing section includes a conveyor belt (91), a hot pressing plate (92), and a roller assembly (93). The roller assembly (93) is rotatably connected to the top of the frame (31). The hot pressing plate (92) is slidably connected to the top of the frame (31) via a cylinder (94). A groove (95) is provided on the hot pressing plate (92). A heating element (96) is provided in the hot pressing plate (92) near the top of the groove (95).

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