Woven bag ring machine and working method thereof

Abstract

The present invention discloses a woven bag ring mouth machine, which belongs to the field of woven bag processing equipment, solves the problem of uneven bag mouth after folding of woven bags in the prior art, and the technical solution to solve the problem is mainly that the bonding component includes an external bonding head located outside the woven bag and an internal bonding head that can enter the inside of the woven bag, the fourth suction cup component, the folding component and the external bonding head are arranged along the first direction, the internal bonding head can reciprocate relative to the frame parallel to the first direction, the internal bonding head has a receiving station for receiving the woven bag, a bonding station aligned with the external bonding head in the vertical direction, and a reset station separated from the woven bag, and the receiving station, the bonding station and the reset station are distributed along the first direction. The present invention is mainly used to improve the flatness of the folded bag mouth of the woven bag.

Description

Technical Field

[0001] The invention relates to woven bag processing equipment, in particular to a woven bag ring opening machine and a working method thereof. Background Art

[0002] Existing woven bag ring opening machines generally include a frame and a folding and bonding device disposed on the frame. The folding and bonding device includes a suction cup assembly, a folding assembly, and a bonding assembly. The suction cup assembly is used to open the bag opening of the woven bag. The folding assembly is used to fold the bag opening of the woven bag inward. The bonding assembly is used to bond and fix the folded bag opening to the bag body of the woven bag. The bonding assembly generally includes an outer bonding head located outside the woven bag and an inner bonding head that can enter the inside of the woven bag. In the common processing method, after the bag opening of the woven bag is folded by the folding assembly, the inner bonding head is allowed to enter the inside of the woven bag and cooperate with the outer bonding head to bond and fix the folded bag opening to the bag body of the woven bag. Since the bag opening of the woven bag will cause wrinkles to form on the newly formed bag opening during the folding process, the directly bonded and fixed bag opening will cause the wrinkles to be uneven, which affects the subsequent processing and the quality of the woven bag. Summary of the invention

[0003] The purpose to be achieved by the present invention is to provide a woven bag ring opening machine, which overcomes the shortcomings of the prior art and improves the flatness of the folded bag mouth of the woven bag.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a woven bag ring mouth machine, comprising a frame and an inner and outer bag alignment and laminating device and a folding and bonding device arranged on the frame, the folding and bonding device being located downstream of the inner and outer bag alignment and laminating device, the folding and bonding device comprising a fourth suction cup assembly, a folding assembly and a bonding assembly, the fourth suction cup assembly being used to open the bag mouth of the woven bag, the folding assembly being used to fold the bag mouth of the woven bag inward, the bonding assembly being used to bond and fix the folded bag mouth to the bag body of the woven bag, the bonding assembly comprising an outer bonding head located outside the woven bag and an inner bonding head that can enter the interior of the woven bag, the fourth suction cup assembly, the folding assembly and the outer bonding head being arranged along a first direction, the inner bonding head being able to reciprocate relative to the frame parallel to the first direction, the inner bonding head having a receiving station for receiving the woven bag, a bonding station aligned with the outer bonding head in a vertical direction, and a resetting station detached from the woven bag, and the receiving station, the bonding station and the resetting station are distributed along the first direction.

[0005] Furthermore, the frame is provided with an upper folding bracket and a lower folding bracket, the upper folding bracket is located above the lower folding bracket, the folding assembly includes an upper folding piece and a lower folding piece, the fourth suction cup assembly includes a fourth upper suction cup and a fourth lower suction cup, the upper folding piece and the fourth upper suction cup are installed on the upper folding bracket, the lower folding piece and the fourth lower suction cup are installed on the lower folding bracket, the machine body is provided with a folding lifting drive for driving the upper folding bracket and the lower folding bracket to move closer to or away from each other, the upper folding bracket is provided with an upper folding drive for driving the upper folding piece to flip for folding, and the lower folding bracket is provided with a lower folding drive for driving the lower folding piece to flip for folding;

[0006] Alternatively, a fourth suction cup upper bracket and a fourth suction cup lower bracket are provided on the frame, the fourth suction cup upper bracket is located above the fourth suction cup lower bracket, the fourth suction cup assembly includes a fourth upper suction cup and a fourth lower suction cup, the fourth upper suction cup is mounted on the fourth suction cup upper bracket, the fourth lower suction cup is mounted on the fourth suction cup lower bracket, the fourth suction cup upper bracket is provided with an upper folding hemming lifting driver, the output end of the upper folding hemming lifting driver is connected to the upper folding hemming bracket, the fourth suction cup lower bracket is provided with a lower folding hemming lifting driver, the output end of the lower folding hemming lifting driver is connected to the lower folding hemming bracket, the upper folding hemming bracket is located above the lower folding hemming bracket, the folding hemming assembly includes an upper folding hemming piece and a lower folding hemming piece, the upper folding hemming bracket is provided with an upper folding hemming driver for driving the upper folding hemming piece to flip over for folding, and the lower folding hemming bracket is provided with a lower folding hemming driver for driving the lower folding hemming piece to flip over for folding.

[0007] Furthermore, the inner bonding head is installed on a sliding bracket, and the sliding bracket is slidably connected to a frame. The frame is provided with a second reciprocating driver for driving the sliding bracket to reciprocate parallel to the first direction. A second left stretching bag part and a second right stretching bag part are provided on the left and right sides of the inner bonding head. The sliding bracket is provided with a second stretching bag driver for driving the second left stretching bag part and the second right stretching bag part to move closer to or away from each other. The second left stretching bag part and the second right stretching bag part extend into the woven bag at the receiving station and stretch the woven bag to fix it relative to the inner bonding head.

[0008] Furthermore, the inner and outer bag alignment and bonding device includes a first suction cup assembly, a second suction cup assembly, a third suction cup assembly and a heat sealing assembly, the first suction cup assembly is used to open the bag opening of the outer bag and position the outer bag, the second suction cup assembly is used to open the bag opening of the inner bag, the third suction cup assembly is used to suck the inner bag and drive the inner bag back into the outer bag so that the bag opening of the inner bag is aligned with the bag opening of the outer bag, and the heat sealing assembly is used to press and fix the aligned bag openings of the outer bag and the inner bag, the first suction cup assembly, the heat sealing assembly and the second suction cup assembly are arranged along a first direction, and the third suction cup assembly is configured to be able to reciprocate relative to the frame parallel to the first direction.

[0009] Furthermore, the first suction cup assembly includes a first upper suction cup and a first lower suction cup, the first upper suction cup is located above the first lower suction cup, and the frame is provided with a first driver for driving the first upper suction cup and the first lower suction cup to move closer to or away from each other, and the second suction cup assembly includes a second upper suction cup and a second lower suction cup, the second upper suction cup is located above the second lower suction cup, the second upper suction cup is fixed as a whole with the first upper suction cup, and the second lower suction cup is fixed as a whole with the first lower suction cup.

[0010] Furthermore, a reciprocating bracket is provided on the frame, and a first reciprocating driver is provided on the frame for driving the reciprocating bracket to reciprocate parallel to the first direction. The third suction cup assembly includes a third upper suction cup and a third lower suction cup, and the third upper suction cup and the third lower suction cup are installed on the reciprocating bracket. The third upper suction cup is located above the third lower suction cup, and the third upper suction cup and the third lower suction cup are arranged back to back.

[0011] Furthermore, the reciprocating bracket is provided with a first stretching bag assembly, which includes a first left stretching bag part, a first right stretching bag part, a first stretching bag driver and a first stretching bag support. The first left stretching bag part, the third suction cup assembly and the first right stretching bag part are distributed along a second direction, the second direction is perpendicular to the first direction and parallel to the bag opening of the woven bag, the first left stretching bag part and the first right stretching bag part are driven by the first stretching bag driver to approach or move away from each other parallel to the second direction, and the first stretching bag support is located in front of the third suction cup assembly in the first direction.

[0012] Furthermore, the heat sealing assembly includes an upper heat sealing head and a lower heat sealing head, the upper heat sealing head is located above the lower heat sealing head, and the frame is provided with a heat sealing driver for driving the upper heat sealing head and the lower heat sealing head to move closer to or away from each other.

[0013] The present invention also provides a working method of the woven bag ring opening machine, which realizes the work of automatically aligning the bag openings of the outer bag and the inner bag, improves the work efficiency, ensures the quality of the alignment of the bag openings of the inner bag and the outer bag, and improves the flatness of the folded bag opening of the woven bag.

[0014] In order to achieve the above object, the present invention adopts the following technical scheme: the working method of the woven bag ring machine comprises the following steps:

[0015] S01 feeding, conveying the woven bags with inner and outer bags to be aligned to the inner and outer bag alignment and laminating device;

[0016] S02: Alignment and heat sealing: the inner bag opening and the outer bag opening of the woven bag are aligned and heat sealed by the inner and outer bag alignment and bonding device;

[0017] S03 material transfer, conveying the aligned and heat-sealed woven bags to the folding and bonding device;

[0018] S04 folding and bonding, the folding and bonding device folds and bonds the bag mouth of the woven bag;

[0019] S05 discharging, the bag mouth is folded and the bonded woven bag is moved out of the folding and bonding device;

[0020] The S04 hem bonding specifically includes the following steps:

[0021] S041: opening the bag mouth by sucking the outer surface of the woven bag by the fourth suction cup assembly;

[0022] S042 folding, folding the mouth of the woven bag through the folding component;

[0023] S043 is flat, the inner bonding head is extended into the woven bag, the woven bag is fixed by the second left stretching bag member and the second right stretching bag member on the left and right sides of the inner bonding head, and the woven bag is moved along the first direction to the position where the inner bonding head is aligned with the outer bonding head, and the first direction is the direction in which the fourth suction cup assembly, the folding edge assembly and the outer bonding head are distributed in sequence;

[0024] S044 bonding, let the outer bonding head approach the inner bonding head to bond and fix the folded bag mouth to the bag body;

[0025] S045 material removal, external bonding head reset, the second left stretched bag piece and the second right stretched bag piece reset, the internal bonding head reset and separated from the woven bag.

[0026] Further, S02 alignment heat sealing specifically includes the following steps:

[0027] S021: opening the outer bag by sucking and opening the outer bag through the first suction cup assembly and positioning the outer bag, and sucking and opening the inner bag through the second suction cup assembly;

[0028] S022 aligning, sucking the inner bag by the third suction cup assembly, stopping the second suction cup assembly from sucking the bag opening of the inner bag, and then driving the inner bag by the third suction cup assembly to return to the outer bag in the opposite direction of the first direction, so that the bag opening of the inner bag is aligned with the bag opening of the outer bag, and at the same time aligning the first bag stretching support member with the heat sealing assembly;

[0029] S023 heat sealing, the first suction cup assembly stops sucking the bag opening of the outer bag, allowing the first bag stretching assembly to stretch the woven bag, and the heat sealing assembly approaches the first bag stretching support to heat-seal and fix the outer bag and the inner bag;

[0030] S024 returns, the first stretching bag assembly is reset, the heat sealing assembly is reset, and the third suction cup assembly and the first stretching bag assembly exit the woven bag.

[0031] After adopting the above technical solution, the present invention has the following advantages:

[0032] By arranging the fourth suction cup assembly, the folding assembly and the outer bonding head along the first direction, the woven bag can be fixed by the fourth suction cup assembly without affecting the folding of the bag opening of the woven bag by the folding assembly. At this time, the woven bag is in the receiving station, and then the inner bonding head moves to the receiving station to receive the woven bag, and then the folding assembly is separated from the woven bag, and then the folded woven bag is moved to the bonding station along the first direction through the inner bonding head. In this process, the woven bag can be flattened by cooperating with the friction force between the frame and the woven bag in the opposite direction of the first direction. Next, the outer bonding head will work together with the inner bonding head to bond and fix the bag opening of the woven bag to the bag body, so that the bag opening of the woven bag is flatter after being bonded and fixed to the bag body. Finally, the inner bonding head is separated from the woven bag and moves to the resetting station along the first direction, and the woven bag continues to be transported forward to the next process. Since most of the bag body of the woven bag is supported by the frame and there is a certain friction between the frame and the bag body, the woven bag will move in the first direction during the folding and bonding process. If the newly formed bag mouth after the woven bag is folded is wrinkled during the folding process, this action can make the bag body and bag mouth of the woven bag flattened before being bonded and fixed, and a flatter bag mouth can be obtained after bonding. Moreover, the woven bag with the bonded bag mouth will not be returned again, but directly sent to the next process, which is conducive to the subsequent processing and further helps to improve the product quality of the woven bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] Figure 1 It is a structural schematic diagram of the woven bag ring opening machine in Example 1 (I);

[0035] Figure 2 for Figure 1 The enlarged view of point Ⅰ in the middle;

[0036] Figure 3 It is a structural schematic diagram (II) of the woven bag ring opening machine in Example 1;

[0037] Figure 4 for Figure 3 The enlarged view of the middle II;

[0038] Figure 5 It is a structural schematic diagram (III) of the woven bag ring opening machine in Example 1;

[0039] Figure 6 for Figure 5 The enlarged view of the middle part Ⅲ;

[0040] Figure 7 It is a structural schematic diagram (four) of the woven bag ring machine in Example 1;

[0041] Figure 8 for Figure 7The enlarged view of the middle IV;

[0042] Fig. 9 This is a schematic diagram of the longitudinal position of the inner and outer bag alignment and laminating device in Example 1;

[0043] Fig.10 It is a schematic diagram of the position of the first stretched bag support member aligned with the upper heat sealing head and the lower heat sealing head in the first embodiment;

[0044] Fig.11 It is a structural schematic diagram (V) of the woven bag ring opening machine in Example 2;

[0045] Fig.12 It is a structural schematic diagram of the woven bag ring opening machine in Example 2 (partial structure is hidden);

[0046] Fig.13 for Fig.12 The enlarged view of point V in the middle;

[0047] Fig.14 Schematic diagram of the working of the folding and bonding device in Example 2 (I);

[0048] Fig.15 This is a working schematic diagram of the folding and bonding device in Example 2 (II);

[0049] Fig.16 Schematic diagram of the working of the folding and bonding device in Example 2 (III);

[0050] Fig.17 Schematic diagram of the working of the folding and bonding device in Example 2 (IV);

[0051] Fig.18 Schematic diagram of the working of the folding and bonding device in Example 2 (V);

[0052] Fig.19 Schematic diagram of the working of the folding and bonding device in Example 2 (VI).

[0053] Fig. 20 It is a schematic diagram of the bag opening of the woven bag in the third embodiment being in a wrinkled state;

[0054] Fig.21 Schematic diagram of the structure of the folding bonding device in Example 3 (the bonding component is not shown);

[0055] Fig. 22 Schematic diagram of the folding bonding device in Example 3 (the bonding component is not shown);

[0056] In the figure, 1, frame; 2, first suction cup assembly; 3, second suction cup assembly; 4, third suction cup assembly; 5, heat sealing assembly; 7, fourth suction cup assembly; 8, folding assembly; 9, bonding assembly; 10, woven bag; 11, reciprocating bracket; 12, first reciprocating drive; 13, folding upper bracket; 14, folding lower bracket; 15, upper bonding drive; 16, lower bonding drive; 17, sliding bracket; 18, second reciprocating drive; 19, four suction cup upper bracket; 20, fourth suction cup lower bracket; 21, first upper suction cup; 22, first lower suction cup; 23, first upper drive; 24, first lower drive; 31, second upper suction cup; 32, second lower suction cup; 4 1. The third upper suction cup; 42. The third lower suction cup; 51. The upper heat sealing head; 52. The lower heat sealing head; 53. The heat sealing driver; 61. The first left stretch bag part; 62. The first right stretch bag part; 63. The first stretch bag driver; 64. The first stretch bag support part; 71. The fourth upper suction cup; 72. The fourth lower suction cup; 81. The upper folding part; 82. The lower folding part; 83. The upper folding driver; 84. The lower folding driver; 85. The upper folding lifting driver; 87. The lower folding lifting driver; 91. The outer bonding head; 92. The inner bonding head; 93. The second left stretch bag part; 94. The second right stretch bag part; 95. The second stretch bag driver; 911. The upper bonding head; 912. The lower bonding head. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0058] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0059] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0060] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0061] It should be understood that in the present invention, "plurality" refers to two or more than two. "And / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains A, B and C", "Contains A, B, C" means that A, B, and C are all included, "Contains A, B or C" means that one of A, B, and C is included, and "Contains A, B and / or C" means that any one, any two, or any three of A, B, and C are included.

[0062] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0063] Embodiment 1:

[0064] like Figures 1 to 8 As shown, the present invention provides a woven bag ring opening machine, including a frame 1 and an inner and outer bag alignment and laminating device and a folding and bonding device arranged on the frame 1. The folding and bonding device is located downstream of the inner and outer bag alignment and laminating device. The inner and outer bag alignment and laminating device includes a first suction cup assembly 2, a second suction cup assembly 3, a third suction cup assembly 4 and a heat sealing assembly 5. The first suction cup assembly 2 is used to open the bag opening of the outer bag and position the outer bag, the second suction cup assembly 3 is used to open the bag opening of the inner bag, the third suction cup assembly 4 is used to suck the inner bag and drive the inner bag back into the outer bag so that the bag opening of the inner bag is aligned with the bag opening of the outer bag, and the heat sealing assembly 5 is used to press and fix the aligned bag openings of the outer bag and the inner bag. The first suction cup assembly 2, the heat sealing assembly 5 and the second suction cup assembly 3 are arranged along a first direction, and the third suction cup assembly 4 is configured to be reciprocatingly movable relative to the frame 1 parallel to the first direction. The first direction can refer to Fig. 9 In the direction indicated by the arrow.

[0065] The woven bag 10 is transported from the preceding station to the inner and outer bag alignment and laminating device of the woven bag 10 and positioned at the position of the first suction cup assembly 2. The first suction cup assembly 2 opens the bag opening of the outer bag and maintains this state, thereby positioning the outer bag at the same time. At this time, the bag opening of the inner bag is located outside the outer bag. The bag opening of the inner bag is opened by the second suction cup assembly 3, and then the third suction cup assembly 4 sucks the inner bag and drives the inner bag back into the outer bag so that the bag opening of the inner bag is aligned with the bag opening of the outer bag. In this process, the third suction cup assembly 4 will have a stroke in the opposite direction to the first direction, and the length of this stroke is determined according to the distance from the edge of the bag opening of the inner bag to the edge of the bag opening of the outer bag. Generally, in the same batch of woven bags 10, this distance is fixed. Therefore, the edge of the bag opening of the inner bag can be aligned with the edge of the bag opening of the outer bag through a mechanical operation with a high degree of automation, which not only greatly improves the work efficiency, but also ensures the quality of the alignment of the bag opening of the inner bag and the bag opening of the outer bag. For different batches of woven bags 10, the reciprocating stroke of the third suction cup assembly 4 in the first direction can be adjusted to adapt. Since the heat sealing assembly 5 is set at a fixed position, and after the woven bag 10 is transported into the inner and outer bag alignment and laminating device of the woven bag 10, the position of the outer bag is positioned, and its position relative to the frame 1 does not change. Therefore, the heat sealing position of the woven bags 10 of the same batch can be guaranteed to be fixed, and the overall consistency will be better, which is conducive to improving the quality grade of the woven bags 10.

[0066] If a higher level of intelligence is desired, a detection device can be used to identify the edge of the inner bag opening and the edge of the outer bag opening and calculate the distance between the two, so that the reciprocating stroke of the third suction cup assembly 4 in the first direction can be determined according to the specific situation of each woven bag 10, for example, by taking pictures and measuring with a binocular camera, but the cost will increase.

[0067] The first suction cup assembly 2 includes a first upper suction cup 21 and a first lower suction cup 22, wherein the first upper suction cup 21 is located above the first lower suction cup 22, and the frame 1 is provided with a first driver for driving the first upper suction cup 21 and the first lower suction cup 22 to move closer to or away from each other. In one embodiment, the first driver can be designed to include a first upper driver 23 and a first lower driver 24, wherein the first upper driver 23 is transmission-connected to the first upper suction cup 21, and the first lower driver 24 is transmission-connected to the first lower suction cup 22. In another embodiment, a driver can also be used in conjunction with a transmission mechanism to drive the first upper suction cup 21 and the first lower suction cup 22 to move closer to or away from each other, such as a common transmission mechanism such as a rack and pinion mechanism and a connecting rod mechanism. The first driver can select a common linear driver such as a cylinder, a linear motor, or can be driven by a common motor in conjunction with a linear reciprocating mechanism.

[0068] The second suction cup assembly 3 includes a second upper suction cup 31 and a second lower suction cup 32. The second upper suction cup 31 is located above the second lower suction cup 32. The second upper suction cup 31 is fixed to the first upper suction cup 21 as a whole, and the second lower suction cup 32 is fixed to the first lower suction cup 22 as a whole. Therefore, the second upper suction cup 31 and the first upper suction cup 21 rise and fall synchronously, and the second lower suction cup 32 and the first lower suction cup 22 rise and fall synchronously, and can be driven by the first driver together, thereby reducing the number of drivers.

[0069] The third suction cup assembly 4 includes a third upper suction cup 41 and a third lower suction cup 42. The third upper suction cup 41 is located above the third lower suction cup 42. The third upper suction cup 41 and the third lower suction cup 42 are arranged back to back, so that the third upper suction cup 41 and the third lower suction cup 42 suck the inner bag opening to both sides. In order to allow the third suction cup assembly 4 to reciprocate relative to the frame 1 parallel to the first direction, a reciprocating bracket 11 is provided on the frame 1, and the third upper suction cup 41 and the third lower suction cup 42 are installed on the reciprocating bracket 11. The frame 1 is provided with a first reciprocating driver 12 that drives the reciprocating bracket 11 to reciprocate parallel to the first direction, such as a common driver such as a motor and a cylinder.

[0070] The first suction cup assembly 2 , the second suction cup assembly 3 and the third suction cup assembly 4 can all use negative pressure to suck the outer bag of the woven bag 10 , and other methods such as electrostatic adsorption can also be considered to suck the woven bag 10 .

[0071] After the opening of the inner bag and the opening of the outer bag are aligned, the inner bag is wrinkled and uneven because the actual width of the inner bag is similar to that of the outer bag and the inner bag is confined in the outer bag. Therefore, in order to keep the inner bag and the outer bag in a relatively flat state, it is necessary to stretch the woven bag 10. To this end, a first bag stretching assembly can be provided on the reciprocating bracket 11, and the first bag stretching assembly includes a first left bag stretching member 61, a first right bag stretching member 62, a first bag stretching driver 63 and a first bag stretching support member 64. The first left bag stretching member 61, the third suction cup assembly 4 and the first right bag stretching member 62 are distributed along the second direction, which is perpendicular to the first direction and parallel to the opening of the woven bag 10. The first left bag stretching member 61 and the first right bag stretching member 62 are driven by the first bag stretching driver 63 to approach or move away from each other in parallel to the second direction. The first bag stretching support member 64 is located in front of the third suction cup assembly 4 in the first direction. The woven bag 10 is relatively wide. After the two sides of the bag opening of the woven bag 10 are stretched open, the middle part may still fall due to the influence of gravity. In the subsequent process of heat-sealing the inner bag and the outer bag, the inner bag is not flat relative to the outer bag. Therefore, the first stretching bag support 64 supports the upper and lower sides of the inner bag, which can effectively improve the flatness of the woven bag 10 and improve the quality of heat-sealing the inner bag and the outer bag. In this embodiment, two first stretching bag drivers 63 are provided, which respectively drive the first left stretching bag member 61 and the first right stretching bag member 62 to move.

[0072] In order to position the inner bag and the outer bag of the aligned woven bag 10 relative to each other and avoid the uneven situation in the subsequent transportation, the heat sealing assembly 5 includes an upper heat sealing head 51 and a lower heat sealing head 52, and the upper heat sealing head 51 is located above the lower heat sealing head 52. The frame 1 is provided with a heat sealing driver 53 that drives the upper heat sealing head 51 and the lower heat sealing head 52 to move closer or farther away from each other. The heat sealing driver 53 can adopt one to drive the upper heat sealing head 51 and the lower heat sealing head 52 at the same time or adopt two to drive the upper heat sealing head 51 and the lower heat sealing head 52 respectively. The heat sealing driver 53 can select common linear drivers such as cylinders and linear motors, or adopt ordinary motors to cooperate with linear reciprocating mechanisms to drive. In order to improve the heat sealing effect, an auxiliary heater can be set at the first stretching bag support 64.

[0073] The working principle of this embodiment can be referred to Fig. 9 and Fig.10 Specifically, Fig. 9 As shown, the woven bag 10 is transported to the inner and outer bag alignment and laminating device, the first suction cup assembly 2 starts to work, the first upper suction cup 21 and the first lower suction cup 22 respectively suck the outer upper surface and the outer lower surface of the bag opening of the outer bag of the woven bag 10, the second upper suction cup 31 and the second lower suction cup 32 respectively suck the outer upper surface and the outer lower surface of the bag opening of the inner bag of the woven bag 10, and then the first upper suction cup 21 and the first lower suction cup 22 move away from each other to open the bag opening of the outer bag of the woven bag 10, and at the same time, the second upper suction cup 31 and the second lower suction cup 32 move away from each other to open the bag opening of the inner bag of the woven bag 10, and the third suction cup assembly 4 moves along the first The third suction cup assembly 41 and the third lower suction cup 42 respectively suck the inner upper surface and the inner lower surface of the inner bag of the woven bag 10, and the third suction cup assembly 4 continues to move in the opposite direction of the first direction, while driving the inner bag of the woven bag 10 to move in the opposite direction of the first direction. After the moving distance reaches a preset value, the first stretching bag assembly stretches the woven bag, and the upper heat sealing head 51 and the lower heat sealing head 52 begin to approach each other to heat seal the woven bag 10. At this time, the first stretching bag support 64 is just between the upper heat sealing head 51 and the lower heat sealing head 52. Fig.10 As shown, it can provide good support for the woven bag 10. The first stretch bag support 64 can be made of flexible rubber, silicone, felt, etc. After the heat sealing is completed, the upper heat sealing head 51 and the lower heat sealing head 52 move away from each other, and the third suction cup assembly 4 returns to the initial position along the first direction, and then the woven bag 10 is transported to the next station.

[0074] Embodiment 2:

[0075] After the inner and outer bag alignment operation is completed, the woven bag will be transported to the folding and bonding device. This embodiment can be implemented separately or based on the first embodiment. Since the newly formed bag mouth of the woven bag 10 will be wrinkled during the folding process, the fixed bag mouth will be wrinkled and uneven after direct bonding, which will affect the subsequent processing and the quality of the woven bag 10. The frame 1 is also provided with a folding and bonding device, which is located downstream of the inner and outer bag alignment and bonding device, such as Figures 11 to 13 The folding and bonding device includes a fourth suction cup assembly 7, a folding assembly 8 and a bonding assembly 9. The fourth suction cup assembly 7 is used to open the bag opening of the woven bag 10. The folding assembly 8 is used to fold the bag opening of the woven bag 10 inward. The bonding assembly 9 is used to bond and fix the folded bag opening to the bag body of the woven bag 10. The bonding assembly 9 includes an external bonding head 91 located outside the woven bag 10 and an internal bonding head 92 that can enter the inside of the woven bag 10. The fourth suction cup assembly 7, the folding assembly 8 and the external bonding head 91 are arranged along a first direction. The internal bonding head 92 can reciprocate relative to the frame 1 in parallel with the first direction. The internal bonding head 92 has a receiving station for receiving the woven bag 10, a bonding station aligned with the external bonding head 91 in the vertical direction, and a reset station detached from the woven bag 10. The receiving station, the bonding station and the reset station are distributed along the first direction. The first direction can be referred to Fig.14 The direction of the X arrow is actually the same as the first direction in the first embodiment.

[0076] By arranging the fourth suction cup assembly 7, the folding assembly 8 and the outer bonding head 91 along the first direction, the woven bag 10 is fixed by the fourth suction cup assembly 7 without affecting the folding of the bag mouth of the woven bag 10 by the folding assembly 8. At this time, the woven bag 10 is in the receiving station, and then the inner bonding head 92 moves to the receiving station to receive the woven bag 10, and then the folded woven bag 10 is separated from the woven bag 10, and then the folded woven bag 10 is moved to the bonding station along the first direction through the inner bonding head 92. In this process, the woven bag 10 can be flattened by the friction force between the frame 1 and the woven bag 10 in the opposite direction of the first direction. Next, the outer bonding head 91 will work together with the inner bonding head 92 to bond and fix the bag mouth of the woven bag 10 to the bag body, so that the bag mouth of the woven bag 10 is more flat after being bonded and fixed to the bag body. Finally, the inner bonding head 92 is separated from the woven bag 10 and moves to the reset station along the first direction, and the woven bag 10 continues to be transported forward to the next process. Since most of the bag body of the woven bag 10 is supported by the frame 1 and there is a certain friction between the woven bag 10 and the frame 1, the woven bag 10 will move along the first direction during the folding and bonding process. If the newly formed bag mouth after the woven bag 10 is folded is wrinkled during the folding process, this action can make the bag body and bag mouth of the woven bag 10 flattened before being bonded and fixed, and a flatter bag mouth can be obtained after bonding. Moreover, the woven bag 10 with the bonded bag mouth will not be returned again, but directly sent to the next process, which is beneficial to the subsequent processing and the improvement of the product quality of the woven bag 10. The outer bonding head 91 and the inner bonding head 92 can use common voltage-type heat sealing equipment or high-frequency electronic heat sealing equipment or ultrasonic bonding equipment.

[0077] Because the mouth of the woven bag 10 needs to be opened, an upper folding bracket 13 and a lower folding bracket 14 are provided on the frame 1, and the upper folding bracket 13 is located above the lower folding bracket 14. After the mouth of the woven bag 10 is opened, an upper and lower side edges will be formed. Therefore, in order to complete the folding work of the upper and lower side edges at the same time, it is necessary to design a folding assembly 8 including an upper folding piece 81 and a lower folding piece 82. The upper folding piece 81 and the lower folding piece 82 can be made of a plate, or can be formed by bending an elastic metal wire as in this embodiment, which can not only fold the mouth of the woven bag 10, but also make the folded woven bag 10 fit the fourth suction cup assembly, which helps to improve the flatness of the folded woven bag 10.

[0078] Similar to the first suction cup assembly 2, the second suction cup assembly 3 and the third suction cup assembly 4, the fourth suction cup assembly 7 in this embodiment also uses a negative pressure method to suck the bag mouth of the woven bag 10. The fourth suction cup assembly 7 includes a fourth upper suction cup 71 and a fourth lower suction cup 72. The upper folding member 81 and the fourth upper suction cup 71 are installed on the upper folding bracket 13, and the lower folding member 82 and the fourth lower suction cup 72 are installed on the lower folding bracket 14. The frame 1 is provided with a folding lifting driver for driving the upper folding bracket 13 and the lower folding bracket 14 to move closer to or away from each other. The upper folding bracket 13 is provided with an upper folding driver 83 for driving the upper folding member 81 to flip for folding, and the lower folding bracket 14 is provided with a lower folding driver 84 for driving the lower folding member 82 to flip for folding. The folding lifting driver enables the fourth suction cup assembly 7 and the folding assembly 8 to be lifted and lowered synchronously, which is convenient for operation. In this embodiment, the upper folding driver 83 and the lower folding driver 84 use cylinders. In addition to cylinders, the upper folding driver 83 and the lower folding driver 84 also use other common linear drivers. In addition to using negative pressure to suck the bag opening of the woven bag 10, the fourth suction cup assembly 7 can also use static electricity to suck the bag opening of the woven bag 10.

[0079] After the bag mouth of the woven bag 10 is opened, two upper and lower sides will be formed, so it is necessary to perform bonding processing on the folded upper and lower sides. To this end, the outer bonding head 91 includes an upper bonding head 911 and a lower bonding head 912, the upper bonding head 911 is located above the lower bonding head 912, and the frame 1 is provided with a bonding driver that drives the upper bonding head 911 and the lower bonding head 912 to move closer to or away from each other. In this embodiment, the frame 1 is provided with an upper bonding driver 15 and a lower bonding driver 16, the upper bonding driver 15 is connected to the upper bonding head 911, and the lower bonding driver 16 is connected to the lower bonding head 912, and the upper bonding driver 15 and the lower bonding driver 16 respectively drive the upper bonding head 911 and the lower bonding head 912 to move closer to or away from each other. It is conceivable that the upper bonding head 911 and the lower bonding head 912 can also be driven to move closer to or away from each other by a driver at the same time. The bonding driver can be a common linear driver such as a cylinder, or it can be realized by a motor in combination with a linear reciprocating mechanism.

[0080] Specifically, in order to allow the inner bonding head 92 to reciprocate parallel to the first direction, the inner bonding head 92 can be installed on the sliding bracket 17, the sliding bracket 17 is slidably connected to the frame 1, and the frame 1 is provided with a second reciprocating driver 18 that drives the sliding bracket 17 to reciprocate. The second reciprocating driver 18 can be a motor, and then cooperate with a screw rod and a nut to achieve the reciprocating motion of the sliding bracket 17. The motor can be a servo motor, which is convenient for controlling the inner bonding head 92 to accurately stay at the receiving station, the bonding station and the reset station.

[0081] In order for the inner bonding head 92 to receive the woven bag 10 at the receiving station, a second left-stretching bag part 93 and a second right-stretching bag part 94 may be provided on the left and right sides of the inner bonding head 92, and a second stretching bag driver 95 for driving the second left-stretching bag part 93 and the second right-stretching bag part 94 to move closer to or away from each other is provided on the sliding bracket 17. The second left-stretching bag part 93 and the second right-stretching bag part 94 extend into the woven bag 10 at the receiving station and stretch the woven bag 10 to fix it relative to the inner bonding head 92. The second left-stretching bag component 93 and the second right-stretching bag component 94 are distributed on the left and right sides of the inner bonding head 92. The second left-stretching bag component 93 and the second right-stretching bag component 94 extend into the woven bag 10 and then move away from each other, which will stretch the bag opening of the woven bag 10 and fix the woven bag 10 on the second left-stretching bag component 93 and the second right-stretching bag component 94, and then move from the receiving station to the bonding station following the second left-stretching bag component 93 and the second right-stretching bag component 94. The second stretching bag driver 95 can be a common linear driver such as a cylinder, or a motor with a linear reciprocating mechanism.

[0082] The working principle of this embodiment can be referred to Figures 14 to 19 Specifically, Fig.14 As shown, the fourth upper suction cup 71 and the fourth lower suction cup 72 open the bag opening of the woven bag 10, at which time the inner bonding head 92 is in the reset position, and then the upper folding edge piece 81 and the lower folding edge piece 82 are turned over to fold the bag opening of the woven bag 10, and enter Fig.15 In the state shown, the inner bonding head 92 then moves in the opposite direction of the first direction to the receiving station and enters Fig.16 In the state shown, the second left stretch bag member 93 and the second right stretch bag member 94 are moved away from each other to fix the woven bag 10 and the inner bonding head 92 relatively, and the upper folding member 81 and the lower folding member 82 are turned over and reset, that is, Fig.17 In the state shown, the inner bonding head 92 then moves the woven bag 10 along the first direction to the bonding station. Since the woven bag 10 is dragged to the bonding station, the flatness of the bag opening of the woven bag 10 can be improved. The upper bonding head 911 and the lower bonding head 912 are close to each other to bond and fix the bag opening of the woven bag 10. Fig.18 Finally, the upper bonding head 911 and the lower bonding head 912 are reset, and the inner bonding head 92 returns to the reset position. Fig.19 In the state shown, the folding and gluing work of the woven bag 10 is completed and the woven bag 10 is transported to the next process.

[0083] For other contents not described in this embodiment, please refer to Embodiment 1.

[0084] Embodiment three:

[0085] Since the dimensions of the upper hem 81 and the lower hem 82 in the first direction are generally fixed, in some cases, if the dimension L1 of the woven bag 10 to be folded is small and smaller than the initial dimension L2 of the upper hem 81 and the lower hem 82 in the first direction, such as Fig. 20 As shown, in the first embodiment, the upper hem piece 81 and the lower hem piece 82 are directly turned over, which may cause the mouth of the woven bag 10 to be pushed by the upper hem piece 81 and the lower hem piece 82 to move in the opposite direction of the first direction, forming wrinkles, and cannot be turned over normally. Therefore, in order to be applicable to more types of woven bags 10, in this embodiment, as shown in FIG. Fig.21 As shown, the frame 1 is provided with a fourth suction cup upper bracket 19 and a fourth suction cup lower bracket 20, the fourth suction cup upper bracket 19 is located above the fourth suction cup lower bracket 20, the fourth suction cup assembly 7 includes a fourth upper suction cup 71 and a fourth lower suction cup 72, the fourth upper suction cup 71 is installed on the fourth suction cup upper bracket 19, the fourth lower suction cup 72 is installed on the fourth suction cup lower bracket 20, the fourth suction cup upper bracket 19 is provided with an upper folding edge lifting driver 85, and the output end of the upper folding edge lifting driver 85 is connected to the folding edge upper The bracket 13 and the lower bracket 20 of the fourth suction cup are provided with a lower folding lifting driver 87, the output end of the lower folding lifting driver 87 is connected to the lower folding bracket 14, the upper folding bracket 13 is located above the lower folding bracket 14, the folding assembly 8 includes an upper folding member 81 and a lower folding member 82, the upper folding bracket 13 is provided with an upper folding driver 83 for driving the upper folding member 81 to flip over for folding, and the lower folding bracket 14 is provided with a lower folding driver 84 for driving the lower folding member 82 to flip over for folding. During the folding process, the upper folding member 81 will drop to a position flush with the upper surface of the woven bag 10 driven by the upper folding lifting driver 85, and the lower folding member 82 will rise to a position flush with the lower surface of the woven bag 10 driven by the lower folding lifting driver 87, as shown in FIG. Fig. 22 As shown, since the upper and lower sides of the woven bag 10 are respectively sucked by the fourth upper suction cup 71 and the fourth lower suction cup 72, the upper folding piece 81 and the lower folding piece 82 are flipped at this time, the bag opening of the woven bag 10 can be driven to be folded, which can also be well used when the bag opening of the woven bag 10 needs to be folded to a smaller size.

[0086] For other contents not described in this embodiment, please refer to Embodiment 2.

[0087] Embodiment 4:

[0088] The present invention also provides a working method of a woven bag ring opening machine, comprising the following steps:

[0089] S01 feeding, conveying the woven bags with inner and outer bags to be aligned to the inner and outer bag alignment and laminating device;

[0090] S02: Alignment and heat sealing: the inner bag opening and the outer bag opening of the woven bag are aligned and heat sealed by the inner and outer bag alignment and bonding device;

[0091] S03 material transfer, conveying the aligned and heat-sealed woven bags to the folding and bonding device;

[0092] S04 folding and bonding, the folding and bonding device folds and bonds the bag mouth of the woven bag;

[0093] S05 discharging, the bag mouth is folded and the bonded woven bag is moved out of the folding and bonding device;

[0094] Among them, S04 hem bonding specifically includes the following steps:

[0095] S041: opening the bag mouth by sucking the outer surface of the woven bag by the fourth suction cup assembly;

[0096] S042 folding, folding the mouth of the woven bag through the folding component;

[0097] S043 is flat, the inner bonding head is extended into the woven bag, the woven bag is fixed by the second left stretching bag member and the second right stretching bag member on the left and right sides of the inner bonding head, the fourth suction cup assembly stops sucking the woven bag, and the inner bonding head moves the woven bag along the first direction to the position where the inner bonding head is aligned with the outer bonding head, and the first direction is the direction in which the fourth suction cup assembly, the folding edge assembly and the outer bonding head are distributed in sequence;

[0098] S044 bonding, let the outer bonding head approach the inner bonding head to bond and fix the folded bag mouth to the bag body;

[0099] S045 material removal, external bonding head reset, the second left stretched bag piece and the second right stretched bag piece reset, the internal bonding head reset and separated from the woven bag.

[0100] In this embodiment, the step of leveling S043 is added between the folding step S042 and the bonding step S044, so that the folded woven bag 10 can be moved to the bonding station along the first direction following the inner bonding head 92. In this process, the woven bag 10 can be leveled by the friction force in the opposite direction of the first direction between the frame 1 and the woven bag 10. Next, the outer bonding head 91 will work together with the inner bonding head 92 to bond the bag mouth of the woven bag 10 to the bag body, so that the bag mouth of the woven bag 10 is more level after being bonded and fixed to the bag body. Since most of the bag body of the woven bag 10 is supported by the frame 1 and has a certain friction force with the frame 1, the woven bag 10 will move along the first direction once during the folding and bonding process. If the newly formed bag mouth after the folding of the woven bag 10 is wrinkled during the folding process, this action can make the bag body and the bag mouth of the woven bag 10 leveled before being bonded and fixed, and after bonding, a more level bag mouth can be obtained. Moreover, the woven bag 10 with the bag opening bonded will not be returned again, but directly sent to the next process, which is beneficial to the subsequent processing and is beneficial to improving the product quality of the woven bag 10.

[0101] In addition, S02 alignment heat sealing specifically includes the following steps:

[0102] S021: opening the outer bag by sucking and opening the outer bag through the first suction cup assembly and positioning the outer bag, and sucking and opening the inner bag through the second suction cup assembly;

[0103] S022: Alignment: the third suction cup assembly extends into the inner bag and sucks the inner bag, the second suction cup assembly stops sucking the bag opening of the inner bag, and the third suction cup assembly drives the inner bag to move in the opposite direction of the first direction, so that the bag opening of the inner bag is aligned with the bag opening of the outer bag;

[0104] S023 heat sealing, the first suction cup assembly stops sucking the bag opening of the outer bag, the first bag stretching assembly stretches the woven bag, the third suction cup assembly stops sucking the inner bag, and the heat sealing assembly approaches the first bag stretching support to heat-seal and fix the outer bag and the inner bag;

[0105] S024 returns, the heat sealing assembly is reset, the first stretching bag assembly is reset, and the third suction cup assembly and the first stretching bag assembly exit the woven bag and return to the reset position.

[0106] The woven bag is transported from the preceding station to the inner and outer bag alignment and laminating device and positioned at the position of the first suction cup assembly. The first suction cup assembly opens the bag opening of the outer bag and maintains this state, thereby positioning the outer bag at the same time. At this time, the bag opening of the inner bag is located outside the outer bag. The bag opening of the inner bag is opened by the second suction cup assembly, and then the inner bag is sucked by the third suction cup assembly and driven back into the outer bag to align the bag opening of the inner bag with the bag opening of the outer bag. In this process, the third suction cup assembly will have a stroke opposite to the first direction, and the length of this stroke is determined according to the distance from the edge of the bag opening of the inner bag to the edge of the bag opening of the outer bag. Generally, in the same batch of woven bags, this distance is fixed. Therefore, the edge of the bag opening of the inner bag can be aligned with the edge of the bag opening of the outer bag through a mechanical operation with a high degree of automation, which not only greatly improves the work efficiency, but also ensures the quality of the alignment of the bag opening of the inner bag and the bag opening of the outer bag. For different batches of woven bags, the stroke size of the reciprocating movement of the third suction cup assembly in the first direction can be adjusted to adapt. Since the heat sealing component is fixed in one position, and after the woven bag is transported into the inner and outer bag alignment and bonding device, the position of the outer bag is positioned, and its position relative to the frame does not change. Therefore, the heat sealing position of the woven bags in the same batch can be guaranteed to be fixed, the overall consistency will be better, and it is beneficial to improve the quality grade of the woven bags.

[0107] The mechanical structure involved in this embodiment can refer to the above embodiments.

[0108] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A woven bag ring opening machine, comprising a frame and an inner and outer bag alignment and laminating device and a folding and bonding device arranged on the frame, wherein the folding and bonding device is located downstream of the inner and outer bag alignment and laminating device, and the folding and bonding device comprises a fourth suction cup assembly, a folding assembly and a bonding assembly, wherein the fourth suction cup assembly is used to open the bag opening of the woven bag, the folding assembly is used to fold the bag opening of the woven bag inwardly, and the bonding assembly is used to bond and fix the folded bag opening to the bag body of the woven bag, and wherein: The bonding assembly comprises an outer bonding head located outside the woven bag and an inner bonding head that can enter the inside of the woven bag, the fourth suction cup assembly, the folding edge assembly and the outer bonding head are arranged along the first direction, the inner bonding head can reciprocate relative to the frame parallel to the first direction, the inner bonding head has a receiving station for receiving the woven bag, a bonding station aligned with the outer bonding head in a vertical direction, and a reset station detached from the woven bag, and the receiving station, the bonding station and the reset station are distributed along the first direction; the inner and outer bag alignment and laminating device comprises a first suction cup assembly, a second suction cup assembly, a third suction cup assembly and a heat sealing assembly, and the third suction cup assembly is configured to reciprocate relative to the frame parallel to the first direction; The inner bonding head is installed on a sliding bracket, and the sliding bracket is slidably connected to the frame, and a second reciprocating drive is provided on the frame to drive the sliding bracket to reciprocate parallel to the first direction, and a second left stretching bag part and a second right stretching bag part are provided on the left and right sides of the inner bonding head, and a second stretching bag part is provided on the sliding bracket to drive the second left stretching bag part and the second right stretching bag part to approach or move away from each other, and the second left stretching bag part and the second right stretching bag part extend into the woven bag at the receiving station and stretch the woven bag, and follow the second left stretching bag part and the second right stretching bag part to move from the receiving station to the bonding station; so that the inner bonding head can receive the woven bag at the receiving station and fix it relative to the inner bonding head; the outer bonding head includes an upper bonding head and a lower bonding head, the upper bonding head is located above the lower bonding head, and the frame is provided with a bonding drive that drives the upper bonding head and the lower bonding head to approach or move away from each other, and the bonding drive includes an upper bonding drive and a lower bonding drive, and the upper bonding drive and the lower bonding drive respectively drive the upper bonding head and the lower bonding head to approach or move away from each other; The third suction cup assembly moves in the opposite direction of the first direction, and at the same time drives the inner bag of the woven bag to move in the opposite direction of the first direction. After the moving distance reaches a preset value, the first bag stretching assembly stretches the woven bag, and the upper heat sealing head and the lower heat sealing head begin to approach each other to heat-seal the woven bag. At this time, the first bag stretching support is just between the upper heat sealing head and the lower heat sealing head. After the heat sealing is completed, the upper heat sealing head and the lower heat sealing head move away from each other, and the third suction cup assembly returns to the initial position along the first direction, and then transports the woven bag to the next workstation; the detection device is used to identify the bag opening edge of the inner bag and the bag opening edge of the outer bag and calculate the distance between the two; the frame is provided with a fourth suction cup upper bracket and a fourth suction cup lower bracket, and the fourth suction cup upper bracket The frame is located above the fourth suction cup lower bracket, the fourth suction cup assembly includes a fourth upper suction cup and a fourth lower suction cup, the fourth upper suction cup is installed on the fourth suction cup upper bracket, the fourth lower suction cup is installed on the fourth suction cup lower bracket, the fourth suction cup upper bracket is provided with an upper folding lifting driver, the output end of the upper folding lifting driver is connected to the folding upper bracket, the fourth suction cup lower bracket is provided with a lower folding lifting driver, the output end of the lower folding lifting driver is connected to the folding lower bracket, the folding upper bracket is located above the folding lower bracket, the folding assembly includes an upper folding piece and a lower folding piece, the folding upper bracket is provided with an upper folding driver for driving the upper folding piece to flip for folding, and the folding lower bracket is provided with a lower folding driver for driving the lower folding piece to flip for folding.

2. The woven bag ring opening machine according to claim 1, characterized in that: The first suction cup assembly is used to open the opening of the outer bag and position the outer bag, the second suction cup assembly is used to open the opening of the inner bag, the third suction cup assembly is used to suck the inner bag and drive the inner bag back into the outer bag so that the opening of the inner bag is aligned with the opening of the outer bag, the heat sealing assembly is used to press and fix the aligned openings of the outer bag and the inner bag, and the first suction cup assembly, the heat sealing assembly and the second suction cup assembly are arranged along the first direction.

3. The woven bag ring opening machine according to claim 2, characterized in that: The first suction cup assembly includes a first upper suction cup and a first lower suction cup, the first upper suction cup is located above the first lower suction cup, and the frame is provided with a first driver that drives the first upper suction cup and the first lower suction cup to move closer to or away from each other, the second suction cup assembly includes a second upper suction cup and a second lower suction cup, the second upper suction cup is located above the second lower suction cup, the second upper suction cup is fixed to the first upper suction cup as a whole, and the second lower suction cup is fixed to the first lower suction cup as a whole.

4. The woven bag ring opening machine according to claim 3, characterized in that: The frame is provided with a reciprocating bracket, and the frame is provided with a first reciprocating driver for driving the reciprocating bracket to reciprocate parallel to the first direction. The third suction cup assembly includes a third upper suction cup and a third lower suction cup, and the third upper suction cup and the third lower suction cup are installed on the reciprocating bracket. The third upper suction cup is located above the third lower suction cup, and the third upper suction cup and the third lower suction cup are arranged back to back.

5. The woven bag ring opening machine according to claim 4, characterized in that: The reciprocating bracket is provided with a first stretching bag assembly, which includes a first left stretching bag part, a first right stretching bag part, a first stretching bag driver and a first stretching bag support. The first left stretching bag part, the third suction cup assembly and the first right stretching bag part are distributed along a second direction, the second direction is perpendicular to the first direction and parallel to the bag opening of the woven bag, the first left stretching bag part and the first right stretching bag part are driven by the first stretching bag driver to approach or move away from each other parallel to the second direction, and the first stretching bag support is located in front of the third suction cup assembly in the first direction.

6. The woven bag ring opening machine according to claim 2, characterized in that: The heat sealing assembly comprises an upper heat sealing head and a lower heat sealing head, wherein the upper heat sealing head is located above the lower heat sealing head, and a heat sealing driver is provided on the frame for driving the upper heat sealing head and the lower heat sealing head to move closer to or away from each other.

7. A working method of a woven bag ring machine, characterized in that: The woven bag ring-opening machine is the woven bag ring-opening machine according to any one of claims 1 to 6, comprising the following steps: S01 feeding, conveying the woven bags with inner and outer bags to be aligned to the inner and outer bag alignment and laminating device; S02: Alignment and heat sealing: the inner bag opening and the outer bag opening of the woven bag are aligned and heat sealed by the inner and outer bag alignment and bonding device; S03 material transfer, conveying the aligned and heat-sealed woven bags to the folding and bonding device; S04 folding and bonding, the folding and bonding device folds and bonds the bag mouth of the woven bag; S05 discharging, the bag mouth is folded and the bonded woven bag is moved out of the folding and bonding device; S04 hem bonding specifically includes the following steps: S041: opening the bag, and opening the bag mouth of the woven bag by adsorbing the outer surface of the woven bag by the fourth suction cup assembly; S042 folding, folding the mouth of the woven bag through the folding component; S043 is flat, the inner bonding head is extended into the woven bag, the woven bag is fixed by the second left stretching bag member and the second right stretching bag member on the left and right sides of the inner bonding head, the fourth suction cup assembly stops sucking the woven bag, and the inner bonding head moves the woven bag along the first direction to the position where the inner bonding head is aligned with the outer bonding head, and the first direction is the direction in which the fourth suction cup assembly, the folding edge assembly and the outer bonding head are distributed in sequence; S044 bonding, let the outer bonding head approach the inner bonding head to bond and fix the folded bag mouth to the bag body; S045 material removal, external bonding head reset, the second left stretched bag piece and the second right stretched bag piece reset, the internal bonding head reset and separated from the woven bag.

8. The working method of the woven bag ring machine according to claim 7, characterized in that: S02 alignment heat sealing specifically includes the following steps: S021: opening the outer bag by sucking and opening the outer bag through the first suction cup assembly and positioning the outer bag, and sucking and opening the inner bag through the second suction cup assembly; S022: Alignment: the third suction cup assembly extends into the inner bag and sucks the inner bag, the second suction cup assembly stops sucking the bag opening of the inner bag, and the third suction cup assembly drives the inner bag to move in the opposite direction of the first direction, so that the bag opening of the inner bag is aligned with the bag opening of the outer bag; S023 heat sealing, the first suction cup assembly stops sucking the bag opening of the outer bag, the first bag stretching assembly stretches the woven bag, the third suction cup assembly stops sucking the inner bag, and the heat sealing assembly approaches the first bag stretching support to heat-seal and fix the outer bag and the inner bag; S024 returns, the heat sealing assembly is reset, the first stretching bag assembly is reset, and the third suction cup assembly and the first stretching bag assembly exit the woven bag and return to the reset position.

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