A method for conveying an outer bag of a cushioned airbag

Abstract

The application relates to the forming processing technical field of a buffer inflatable bag, in particular to an outer bag conveying method for buffer inflatable bag production. The conveying method is improved by replacing the conveying mode of the outer bag. When the top layer of the outer bag is grabbed and reversed, one end of the traction conveying of the top layer of the outer bag is first adsorbed, then the other end part opposite to the traction conveying direction is lifted and tilted, so that the end part of the outer bag of the next layer is exposed, pressure is then applied on the exposed end part of the outer bag of the next layer to limit the freedom, and then when the top layer of the outer bag is adsorbed and conveyed, the outer bag of the next layer is completely fixed and cannot be dislocated, the accuracy and precision in the forming process are improved, and the processing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forming processing of cushion air bags, in particular to an outer bag conveying method for cushion air bag production. BACKGROUND

[0002] A cushion air bag is usually composed of multiple layers of materials, including air cushion film, inflation film, etc. Its working principle is to establish an air cushion around the goods to reduce the impact and pressure on the goods during transportation. When the goods arrive at the destination, the cushion air bag can ensure that the goods are delivered to the recipient intact.

[0003] The structure and working principle of the cushion air bag make it have the following advantages:

[0004] Protect goods: The cushion air bag can effectively protect the goods from damage during transportation, reducing the damage rate of the goods.

[0005] Improve transportation efficiency: The cushion air bag can prevent the goods from being damaged due to shaking during transportation, thereby improving transportation efficiency.

[0006] Reduce transportation cost: The cushion air bag can be reused, reducing transportation cost.

[0007] Environmentally friendly: The cushion air bag is made of recyclable materials, which has less impact on the environment.

[0008] The existing processing method of the cushion air bag is to first form an inner bag with an inflation valve and an outer cylindrical outer bag, then put the inner bag into the outer bag, and then sew the opening of the outer bag to complete the processing and forming of the cushion air bag.

[0009] For example, in the Chinese patent with patent application number 202410254474.2, an integrally formed cushion air bag and its manufacturing method are disclosed, which is aimed at the forming processing method of the inner bag.

[0010] For example, in the Chinese patent with patent application number 202223130374.4, a double-path conveying platform for the outer bag body of the cushion air bag is specifically disclosed, which involves the slitting and conveying of the outer bag.

[0011] However, when assembling the outer bag and the inner bag, the stacked outer bags are often conveyed to the bagging station, and then grasped one by one to be fitted with the inner bag. During the grasping process, the outer bags adhere to each other due to electrostatic action and intermolecular forces, causing the top outer bag to be grasped in reverse, and the next layer of outer bag to be offset, resulting in misalignment of the next layer of outer bag and inaccurate grasping and conveying. SUMMARY

[0012] To solve the above problems, the application provides an outer bag conveying method for buffer inflatable bag production, which improves the conveying mode of the outer bag replacement, and when the top layer of the outer bag is grabbed and reversed, one end of the traction conveying of the top layer of the outer bag is first adsorbed, and the other end opposite to the traction conveying direction is lifted and tilted, so that the end of the outer bag of the next layer is exposed, and then pressure is applied to the exposed end of the outer bag of the next layer to limit the degree of freedom, so that when the top layer of the outer bag is adsorbed and conveyed, the outer bag of the next layer is completely fixed and will not be misaligned, improving the accuracy and precision in the forming process and improving the processing efficiency.

[0013] To achieve the above object, the application provides the following technical scheme:

[0014] An outer bag conveying method for buffer inflatable bag production, comprising the following steps:

[0015] Step T1, unwinding and cutting: the outer bag material roll is unwound and cut at the cutting station to form a single, square, flat outer bag, and the A and B ends of the outer bag are arranged as openings and are oppositely arranged;

[0016] Step T2, stacking: the cut outer bag is stacked at the stacking station on the rear side of the cutting station to form at least two groups of outer bag stacked outer bag stacks;

[0017] Step T3, conveying: the outer bag stack is conveyed horizontally along the A and B end directions to the reversing grabbing station by the conveying line;

[0018] Step T4, grabbing and reversing: the outer bag stack at the reversing grabbing station is grabbed one by one by the grabbing manipulator from top to bottom, and is conveyed horizontally along the C and D end directions perpendicular to the A and B end directions, and when the outer bag is grabbed and reversed, the freedom of the outer bag in the next layer in the C and D end directions is fixed by limiting.

[0019] As an improvement, in step T2, the number of outer bags stacked in the outer bag stack is 5-15 layers, specifically, the number of outer bags in the outer bag stack can be any one of 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15 layers, but the number of outer bags stacked in the outer bag stack in the application is not limited to the above number.

[0020] As an improvement, in step T4, the grabbing and reversing includes the following steps:

[0021] Step t1, adsorption: the C end of the outer bag at the top is adsorbed and fixed by the vacuum chuck, at this time, the vacuum chuck does not drive the outer bag for traction conveying;

[0022] Step t2, separation, synchronous with step t1, at the D end of the top outer bag, a pressure F1 is applied at a position offset inward by a distance H, and after compression, the D end of the top outer bag is lifted by the separation suction cup outside the pressure F1, and the D end of the top outer bag is separated from the D end of the outer bag in the next layer;

[0023] Step t3, positioning, after the D end of the top outer bag is lifted, the D end of the outer bag in the next layer is exposed, and after a pressure F2 is applied to the D end of the outer bag in the next layer, the pressure F1 in step t2 and the suction of the separation suction cup are cancelled;

[0024] Step t4, traction, the top outer bag is separated from the reversing gripping station by a traction vacuum suction cup, so that the top outer bag is horizontally transported along the C and D end direction, the traction direction of the vacuum suction cup is to pull the C end of the outer bag, so that the D end of the outer bag gradually separates from the range of the outer bag in the next layer, and since the D end of the outer bag in the next layer is fixed and limited, the top outer bag will not cause misalignment of the outer bag in the next layer during traction movement.

[0025] As an improvement, in step t2, the relationship between the offset distance H and the width L of the C and D ends of the outer bag satisfies: 1 / 3*L≤H<1 / 2*L, and the offset distance H is used for the suction of the separation suction cup, so that the D end can be lifted.

[0026] As an improvement, in step T2, the pressure F1 acts on the outer bag through a vertically lifting pressure plate, the length S1 of the pressure plate and the length S2 of the separation suction cup satisfy: S1>S2, and the freedom degree of the pressure F1 application can ensure that the top outer bag will not misalign with the remaining outer bags below during the lifting process, even if the top outer bag is lifted, the D end of the remaining outer bags below will also be lifted due to adhesion, but the overall position will not be offset, and the length S1 of the pressure plate is greater than the suction length S2 of the separation suction cup, which can quickly achieve the purpose of separating the top outer bag from the outer bag below when the D end of the outer bag is lifted by the separation suction cup, and realize the quick separation of point to surface.

[0027] As an improvement, in step T2, the lifting direction of the separation suction cup is set at an angle α with the outer bag, the opening direction of the angle α is towards the C end of the outer bag, and the range of the angle α is 80-85°, the inclination of the lifting direction of the separation suction cup makes the D end lifted by the separation suction cup better separated from the outer bag below, and at the same time, it can ensure that the outer bag in the range from the separation suction cup to the pressure plate will not be pulled during the lifting of the D end, and the stability of the outer bag D end lifted by the separation suction cup can be ensured.

[0028] As an improvement, the angle α between the lifting direction of the separation suction cup and the outer bag can be adjusted.

[0029] Specifically, the separation suction disc is installed at the bottom of the connecting piece, the middle part of the connecting piece is provided with a fixing shaft limiting the freedom degree, and the upper part of the connecting piece is driven to rotate and swing around the fixing shaft by the driving piece. The lifting angle of the separation suction disc is adjusted by adjusting the rotation and swing amplitude of the connecting piece driven by the driving piece.

[0030] As an improvement, in the step T3, the pressure F2 is applied to the outer bag through the press strip arranged to be lifted, and the lifting direction of the press strip is arranged in parallel with the lifting direction of the separation suction disc. The application direction of the pressure F2 is consistent with the lifting direction of the separation suction disc, so that when the pressure F2 acts on the outer bag of the next layer, the possible lifting of the D end of the outer bag of the next layer can be flattened, and the freedom degree of the outer bag of the next layer in the C and D end direction is limited.

[0031] As an improvement, in the step t4, when the vacuum suction disc pulls the outer bag, the vacuum suction disc has freedom degree in the C and D end direction of the outer bag, and the vacuum suction disc also has freedom degree in the A and B end direction of the outer bag, so that when the vacuum suction disc adsorbs and pulls the outer bag, the outer bag can also be adjusted in the A and B end direction.

[0032] The beneficial effects of the present application are:

[0033] (1) The present application improves the replacement conveying mode of the outer bag. When the top layer of the outer bag is grabbed and reversed, one end of the top layer of the outer bag is adsorbed first, and then the other end opposite to the traction conveying direction is lifted to expose the end of the next layer of the outer bag. Then, pressure is applied to the exposed end of the next layer of the outer bag to limit the freedom degree, so that when the top layer of the outer bag is adsorbed and conveyed, the next layer of the outer bag is completely fixed and will not be misaligned, improving the accuracy and precision in the forming process and improving the processing efficiency.

[0034] (2) Before the D end of the top layer of the outer bag is lifted, the freedom degree of the top layer of the outer bag is limited, so that misalignment of the top layer of the outer bag during the D end lifting process is avoided. In addition, the separation suction disc for D end lifting adsorbs the outer bag at an inclination of 80-85°, so that the limit distance of the separation suction disc to the fixed position of the top layer of the outer bag will not be large during the lifting process, avoiding deformation and misalignment of the separation suction disc when adsorbing and lifting the outer bag, and ensuring smooth operation of the D end lifting of the outer bag.

[0035] (3) The lifting direction of the pressing strip generating pressure F2 is parallel to the lifting direction of the separating chuck, so that after the D end of the outer bag on the top is lifted by the separating chuck, the pressing strip is pressed along the lifting direction of the separating chuck, so that the D end of the next layer of outer bag can be pressed and flattened synchronously when the freedom of the next layer of outer bag is limited, and the problem of movement dislocation of the D end of the next layer of outer bag due to the lifting of the D end of the top outer bag is avoided;

[0036] (4) When the vacuum chuck reverses the conveying of the outer bag, not only does it have the freedom of traction movement in the C and D end direction of the outer bag, but also the vacuum chuck has the freedom in the A and B end of the outer bag, so that the vacuum chuck can have the ability to correct deviation during the traction of the outer bag during conveying, so that the fitting accuracy of the outer bag and the inner bag is further improved.

[0037] In summary, the present application has the advantages of high processing precision, low scrap rate, smooth outer bag conveying, no bag jamming, etc., and is especially suitable for the conveying and processing technology field of the outer bag of the buffer inflatable bag. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 The assembly drawing of the outer bag conveying system for the buffer inflatable bag production of the present application;

[0039] Figure 2 The schematic view of the top structure of the outer bag of the present application;

[0040] Figure 3 The schematic view of the side structure of the outer bag material pile of the present application;

[0041] Figure 4 The schematic view of the three-dimensional structure of the grabbing manipulator of the present application;

[0042] Figure 5 The schematic view of the side structure of the grabbing manipulator of the present application;

[0043] Figure 6 The schematic view of the three-dimensional structure of the vacuum chuck of the present application;

[0044] Figure 7 The schematic view of the side structure of the separating chuck of the present application;

[0045] Figure 8 The schematic view of the three-dimensional structure of the separating chuck of the present application;

[0046] Figure 9 The lifting path schematic view of the lifting cylinder lifting after the D end of the outer bag is sucked;

[0047] Figure 10 The state schematic view of the D end of the outer bag of the present application;

[0048] Figure 11The next layer of the outer bag D end fixed position state diagram of the application is shown in the figure.

[0049] Figure 12 The top outer bag traction state diagram of the application is shown in the figure.

[0050] In the figure: grabbing manipulator I, outer bag 100, outer bag pile 200, conveying line 300, cutting station 10, stacking station 20, reversing grabbing station 30, mounting frame 1, vacuum chuck 2, lifting cylinder 21, first linear module 22, second linear module 23, separation chuck 3, lifting cylinder 31, connecting piece 32, fixed shaft 33, driving piece 34, adjusting cylinder 35, pressing plate 4, cylinder 41, pressing strip 5, and pressing cylinder 51. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0052] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0053] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0054] Embodiment:

[0055] As Figure 1 , 10 As shown in FIG. 12, a method for conveying an outer bag for producing a cushioned air bag includes the following steps:

[0056] Step T1, unwinding and cutting, the outer bag material roll is unwound, and after cutting, a single, square, flat outer bag 100 is formed, and the A and B ends of the outer bag 100 are provided in an open manner;

[0057] Step T2, stacking, the outer bag 100 after cutting is stacked at the stacking station 20 behind the cutting station 10 to form at least two groups of outer bag stacks 200;

[0058] Step T3, conveying, the outer bag stack 200 is conveyed horizontally along the A and B end directions to the reversing grabbing station 30 through the conveying line 300;

[0059] Step T4, grabbing and reversing, the outer bag 100 is grabbed one by one from top to bottom by the grabbing manipulator I at the reversing grabbing station 30 and is conveyed horizontally in the C and D end directions perpendicular to the A and B end directions, and when the outer bag 100 is grabbed and reversed, the freedom of the outer bag 100 in the next layer in the C and D end directions is fixed by limiting.

[0060] Further, in step T4, the grabbing and reversing includes the following steps:

[0061] Step t1, adsorption, the C end of the outer bag 100 at the top is adsorbed and fixed by the vacuum chuck 2;

[0062] Step t2, separation, at the same time as step t1, a pressure F1 is applied to the position offset inward by a distance H at the D end of the outer bag 100 at the top after being pressed tightly (the pressure F1 is applied to the outer bag 100 by the vertically lifting pressure plate 4), the D end of the outer bag 100 is lifted and raised by the separation chuck 3 outside the pressure F1, so that the D end of the outer bag 100 at the top is separated from the D end of the outer bag 100 in the next layer;

[0063] Step t3, positioning, after the D end of the outer bag 100 at the top is raised, the D end of the outer bag 100 in the next layer is exposed, and after a pressure F2 is applied to the D end of the outer bag 100 in the next layer (the pressure F2 is applied to the outer bag 100 by the lifting pressure strip 5, and the lifting direction of the pressure strip 5 is parallel to the lifting direction of the separation chuck 3), the pressure F1 in step t2 and the adsorption of the separation chuck 3 are cancelled;

[0064] Step t4, traction, the outer bag 100 at the top is separated from the reversing grabbing station 30 by the traction vacuum chuck 2, so that the outer bag 100 at the top is conveyed horizontally in the C and D end directions.

[0065] The number of outer bags 100 stacked in the outer bag stack in step T2 is 5-15 layers, preferably 10 layers in this embodiment. The 10-layer outer bag stack 200 is grasped and reversed at the reversing grasping station 30. The slitting station 10 can complete the slitting of 10 new outer bags 100 at the same time. Simultaneously, the stacking station 20 also completes the stacking of the outer bag stack 200.

[0066] As shown in Figures 1 to 12 Further, the slitting, stacking and conveying structure of the outer bag 100 in this application refers to the specific structure of the double-path conveying platform of the outer bag body of the buffer inflatable bag in the Chinese patent with application number 202223130374.4. Therefore, the specific structure of each part of the device is not described in detail here. This embodiment focuses on the specific structure of the outer bag grasping and reversing. In step T4, the material grasping manipulator I includes a mounting frame 1. The mounting frame 1 is installed with a vacuum chuck 2, a separation chuck 3, a pressing plate 4 and a pressing strip 5 above the reversing grasping station 30. The vacuum chuck 2 moves up and down in the vertical direction through a lifting cylinder 21. At the same time, the vacuum chuck 2 is pulled in the C and D end direction of the outer bag 100 through a first linear module 22, and is corrected and pulled in the A and B end direction of the outer bag 100 through a second linear module 23. Initially, the vacuum chuck 2 is located above the C end of the outer bag 100 at the grasping station 30.

[0067] The separation suction cup 3 is lifted by the lifting cylinder 31 to lift the D end of the outer bag 100, and the lifting cylinder 31 is installed at the bottom of the connecting piece 32. An adjusting cylinder 35 is arranged between the lifting cylinder 31 and the connecting piece 32. The middle part of the connecting piece 32 is provided with a fixed shaft 33 for limiting the degree of freedom. The fixed shaft 33 is installed on the mounting frame 1. The upper part of the connecting piece 32 is driven by the driving piece 34 to rotate and swing around the fixed shaft. Initially, the separation suction cup 3 is inclined towards the C end of the outer bag 100. At this time, the outer bag material pile 200 is conveniently transported to the reversing grabbing station 30. When the outer bag material pile 200 is transported to the reversing grabbing station 30, the connecting piece 32 is pulled by the driving piece 34 to rotate and swing around the fixed shaft 33, so that the separation suction cup 3 swings to be inclined towards the D end of the outer bag 100. Then, the separation suction cup 3 is adsorbed by the descending of the lifting cylinder 31 to the D end of the outer bag 100 at the top. After the adsorption is completed, the lifting cylinder 31 lifts the separation suction cup 3 to lift the D end. At this time, the pressing plate 4 has already applied a pressure F1 to the outer bag material pile 200 by the driving of the cylinder 41. At the same time, the pressing strip 5 installed on the other side of the connecting piece 32 is driven by the pressing cylinder 51 to complete the pressing action on the D end of the next layer of exposed outer bag 100 to apply a pressure F2, so as to limit the next layer of outer bag 100. Then, the separation suction cup 3 stops adsorbing, the pressing plate 4 is lifted, the outer bag 100 at the top is pulled away from the grabbing station 30 by the vacuum suction cup 2 through the first linear module 22, and at the same time, the next layer of outer bag 100 is not moved.

[0068] As Figures 9 to 12It is emphasized here that the lifting direction of the separation suction cup 3 driven by the lifting cylinder 31 is arranged at an angle a with the outer bag 100 arranged horizontally below, the opening direction of the angle a is towards the C end of the outer bag, and the range of the angle a is 80-85°, preferably 82°, and the size of the angle a can be adjusted by controlling the swing amplitude of the connecting piece 32 pulled by the driving piece 34, the size of the angle a cannot be less than 80°, and when it is less than 80°, the adsorption force of the separation suction cup 3 to the outer bag 100 will be greatly reduced after it is lowered (due to the existence of the angle a, when the separation suction cup 3 contacts the outer bag 100, one side will contact first, but due to the flexibility of the separation suction cup itself, when the angle a is less than a certain angle, the separation suction cup 3 can still form adsorption to the outer bag 100), and when it is greater than 85°, the distance between the separation suction cup 3 and the pressing plate 4 will change from large to small and then to large when the separation suction cup 3 adsorbs the outer bag 100 and lifts it, specifically, the position where the separation suction cup 3 adsorbs the outer bag 100 is point E, the position where the separation suction cup 3 lifts the outer bag 100 after being driven is point F, and the position where the pressing plate 4 presses the outer bag is point G, then E, F, and G form a triangle, in order to avoid pulling during the lifting of the D end of the outer bag 100, EG=FG, and EF is the stroke of the lifting cylinder 31, and the minimum value of the lifting cylinder 31 is preset to be 10 cm (once the stroke is too small, the lifting height of the D end of the outer bag 100 is insufficient, and the exposure of the D end of the next layer of outer bag 100 cannot be realized), since EG=cot a*(1 / 2*EF), cot 5°≈11.43, and cot 10°≈5.67, then EG is 28.35-57.15 cm, the greater the stroke of the lifting cylinder, the longer the length of EG, and the relationship between the offset distance H and the width L of the C and D ends of the outer bag satisfies: 1 / 3*L≤H<1 / 2*L (here it is limited that the pressing position of the pressing plate 4 to the outer bag 100 cannot be too far from the D end, once the position is too far, the separation range between the top outer bag 100 and the adjacent outer bag 100 after the D end is lifted by the separation suction cup 3 will be greatly increased, and the influence of the electrostatic effect and the intermolecular force will also be greatly increased, therefore, the pressing position of the pressing plate 4 to the outer bag 100 cannot be too far from the D end), therefore, it is not difficult to calculate that the width L of the outer bag is already between 56 cm and 170 cm under this condition, and if the stroke of the lifting cylinder 31 is further expanded, the width L of the outer bag will also be further expanded, therefore, the inclination angle a of the lifting cylinder is limited to be between 80-85°, which needs to ensure that the width of the cushion air bag produced is suitable, and also needs to ensure the adsorption performance of the separation suction cup 3 to the outer bag 100.

[0069] In addition, the length S1 of the pressing plate 4 and the length S2 of the outer bag adsorbed by the separation suction cup 3 satisfy: S1>S2.

[0070] It should be noted that the contact surface of the pressing plate 4 with the outer bag 100 is larger than the contact surface of the separation suction disc 3 with the outer bag 100, so that the separation suction disc 3 can overcome the small electrostatic effect and intermolecular force as much as possible, and the outer bag 100 can be lifted.

[0071] Furthermore, the inclination angle of the pressing strip 5 when being pressed down is consistent with the inclination angle of the separation suction disc 3 when being lowered, so that the pressing strip 5 can form a horizontal component force in the direction of the C end and the D end of the outer bag 100 when being pressed down on the next layer of the outer bag 100, and the horizontal component force acts from the C end to the D end, so that the D end of the next layer of the outer bag 100 can be flattened.

[0072] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An outer bag conveying method for cushioned air bag production, characterized by, It comprises the following steps: Step T1, unwinding and cutting, the outer bag material roll of the outer bag roll is unwound and cut in the cutting station to form a single, square, flat outer bag, and the A and B ends of the outer bag are arranged as openings; Step T2, stacking, the outer bag after cutting is stacked in the stacking station behind the cutting station to form at least two groups of outer bag stacked outer bag stacks; Step T3, conveying, the outer bag stack is conveyed horizontally along the A and B end direction to the reversing grabbing station; Step T4, grabbing and reversing, the outer bag stack at the reversing grabbing station is grabbed one by one by the grabbing manipulator from top to bottom, and is conveyed horizontally in the C and D end direction perpendicular to the A and B end direction, and when grabbing and reversing, the freedom of the outer bag in the next layer in the C and D end direction is fixed by limiting, and the grabbing manipulator comprises a mounting frame, a vacuum suction cup, a separation suction cup, a pressing plate and a pressing strip are respectively installed at the part of the mounting frame above the reversing grabbing station, the separation suction cup is driven by a lifting cylinder, and the lifting cylinder is installed at the bottom of the connecting piece, an adjusting cylinder is arranged between the lifting cylinder and the connecting piece, a fixed shaft limiting the freedom thereof is arranged in the middle of the connecting piece, the fixed shaft is installed on the mounting frame, and the upper part of the connecting piece is driven by a driving piece to rotate and swing around the fixed shaft; In step T4, grabbing and reversing comprises the following steps: Step t1, adsorption, the C end of the outer bag at the top is adsorbed and fixed by the vacuum suction cup; Step t2, separation, synchronized with step t1, at the position of the D end of the outer bag at the top, offset inward by a distance H, after the pressing plate exerts pressure F1 on the outer bag pile through the driving of the air cylinder, the connecting piece is pulled to rotate around the fixed shaft by the driving member, so that the separation suction cup swings to the direction of tilting towards the D end of the outer bag, then the separation suction cup is adsorbed by the lifting of the lifting cylinder, and the D end of the outer bag at the top is adsorbed. After the adsorption is completed, the lifting cylinder drives the separation suction cup to lift, so that the D end is lifted, and the D end of the outer bag at the top is separated from the D end of the outer bag located in the next layer. The relationship between the offset distance H and the width L of the C and D ends of the outer bag satisfies: 1 / 3 L≤H<1 / 2 L, the lifting direction of the separation suction cup forms an angle α with the outer bag, the opening direction of the angle α is towards the C end of the outer bag, and the range of the angle α is 80-85°; Step t3, positioning, after the D end of the outer bag at the top is raised, the D end of the outer bag in the next layer is exposed, the pressing strip installed on the other side of the connecting piece is driven by a downward pressure cylinder to complete the downward action on the exposed D end of the outer bag in the next layer, the pressure F1 in step t2 and the adsorption of the separation suction cup are cancelled after the pressure F2 is applied to the D end of the outer bag in the next layer, and the inclination angle of the pressing strip when it is pressed down is consistent with the inclination angle of the separation suction cup, the pressing strip forms a horizontal component force in the C and D end direction of the outer bag while pressing down on the outer bag in the next layer, and the D end of the outer bag in the next layer is flattened; Step t4, traction, the outer bag at the top is separated from the reversing grabbing station by the traction vacuum suction cup, so that the outer bag at the top is conveyed horizontally in the C and D end direction.

2. The outer bag conveying method for producing a cushioning air bag according to claim 1, wherein: In step T2, the number of outer bags stacked in the outer bag stack is 5-15 layers.

3. The outer bag conveying method for producing a cushioning air bag according to claim 1, wherein: In step t2, the pressure F1 acts on the outer bag through the vertically lifting pressing plate, the length S1 of the pressing plate and the length S2 of the outer bag adsorbed by the separation suction cup satisfy: S1>S2.

4. The outer bag conveying method for producing a cushioning air bag according to claim 1, wherein: The angle α between the lifting direction of the separation suction cup and the outer bag is adjustably arranged.

5. The outer bag conveying method for producing a cushioning air bag according to claim 1, wherein: In the step t3, the pressure F2 is applied to the outer bag by a presser bar arranged to be raised and lowered, and the direction of raising and lowering of the presser bar is arranged in parallel with the direction of lifting of the separating chuck.

6. The outer bag conveying method for the production of a cushioning air bag according to claim 1, characterized in that: In the step t4, while the vacuum chuck is pulling the outer bag, the vacuum chuck has a degree of freedom in the direction of the C, D ends of the outer bag, and also has a degree of freedom in the direction of the A, B ends of the outer bag.

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