Bag opening machine for processing circular bags

Abstract

The invention discloses a pocket opening machine for round pocket processing, which comprises a workbench, a sewing assembly arranged on the workbench, a laser cutting assembly, a pocket folding device and a material fixing assembly, the pocket folding device comprises an upper folding knife assembly and a lower folding knife assembly, the upper folding knife assembly comprises a fixing plate arranged in a lifting mode, and a front folding knife, a rear folding knife, a left upper folding knife and a right upper folding knife which are arranged on the fixing plate. The lower folding knife assembly comprises a left lower folding knife and a right lower folding knife. The upper folding knife assembly descends to a cut bag opening, the front folding knife and the rear folding knife horizontally move front and back so as to fold turned edges on the front side and the rear side of the bag opening, the upper left folding knife and the upper right folding knife synchronously descend along with the fixing plate so as to fold the turned edges on the left side and the right side of the bag opening downwards, and then the lower left folding knife and the lower right folding knife horizontally move left and right so as to fold the turned edges on the left side and the right side of the bag opening downwards. The left and right side turned edges which are turned downwards are further turned, the turned arc-shaped turned edges are pressed and shaped, and the quality of follow-up sewing processing of the left and right side arc-shaped pockets is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of clothing processing equipment, in particular to a bag opening machine for processing round pockets. Background Art

[0002] In the clothing processing process, bag opening is an indispensable processing step, which is mainly used to form pockets at specific positions of clothing, which is convenient for carrying small items such as mobile phones and wallets. The process is to first process the bag opening and bag lip separately, and then sew the bag lip to the bag opening to complete the bag opening. The bag opening processing process requires cutting, folding, shaping and sewing the bag lip of the clothing. Cutting is to open an "H" or "Y" shaped slit on the bag opening, folding is to fold the cut bag opening inward to form a flange, and shaping the bag lip is to place the bag lip on the flange, and finally sew. For example, the invention patent with application number CN202010348853.X discloses a bag opening machine for clothing bag opening processing; the invention patent with application number CN202011214831.0 discloses a continuous production clothing bag opening machine.

[0003] However, the bag folding devices of bag opening machines on the market can generally only fold and cut pockets with straight-line contours. For example, the utility model patent with application number CN202221657762.5 discloses an improved structure of an automatic bag folding device for opening cloth bags. This patent has the advantage of stable folding by independently operating the long folding edge and the short folding edge components. However, this patent is not suitable for the folding edges of pockets with arc-shaped flanges on both sides.

[0004] Currently, round pockets are mostly used in clothing such as jackets, sun-protective clothing, and quick-drying clothes and pants. Since the fabrics of the above-mentioned clothing are relatively thin, it is difficult to fold the edges, especially the arc-shaped flanges on both sides. Most of them still rely on manual folding, and the arc-shaped flanges on both sides are prone to deformation during the folding process, which in turn affects the quality of subsequent pocket sewing processing. At the same time, manual folding is inefficient and difficult to meet the needs of automated processing. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a bag opening machine for processing round bags.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A bag opening machine for processing circular pockets, comprising a workbench, a sewing assembly, a laser cutting assembly, a bag folding device arranged on the workbench, and a material setting assembly slidably arranged on the workbench, the material setting assembly comprising an outer pressure frame and an inner pressure frame, the outer pressure frame and the inner pressure frame being provided with processing windows corresponding to the circular pockets, the processing windows being strip-shaped and having long sides corresponding to the front and rear edges of the circular pockets and arcuate portions corresponding to the side edges of the circular pockets; a positioning window is provided on the workbench, located below the bag folding device and corresponding to the position of the processing window;

[0008] The bag folding device includes an upper folding knife assembly and a lower folding knife assembly respectively located above and below the workbench. The upper folding knife assembly includes a lifting fixed plate and a front folding knife, a rear folding knife, an upper left folding knife, and an upper right folding knife arranged on the fixed plate. An action part is provided on the outer side of the upper left folding knife and the upper right folding knife, and the shape of the action part is adapted to the contours on both sides of the processing window. The lower folding knife assembly includes a lifting mounting plate and a lower left folding knife and a lower right folding knife arranged on the mounting plate for transverse movement.

[0009] Preferably, the fixed plate is provided with a translation cylinder for driving the upper left folding knife and the upper right folding knife to translate, and the outer sides of the upper left folding knife and the upper right folding knife are provided with an arc-shaped protruding action portion.

[0010] Preferably, the fixed plate is provided with a lifting cylinder for driving the upper left folding knife and the upper right folding knife to move up and down.

[0011] Preferably, the upper left folding knife and the upper right folding knife are arranged above the front folding knife and the rear folding knife.

[0012] Preferably, a bag folding seat is provided on the crossbeam of the workbench, and a motor on the bag folding seat is connected to a fixed plate through a screw rod.

[0013] Preferably, the mounting plate is provided with relatively sliding slides, and the lower left folding knife and the lower right folding knife are respectively installed on the two slides. The outer sides of the lower left folding knife and the lower right folding knife are provided with arc-shaped protrusions that are adapted to the contours on both sides of the processing window.

[0014] Preferably, a motor three is provided on the mounting plate, and the gear of the motor three engages with the rack and is connected to the skateboard through the rack.

[0015] Preferably, the lower folding knife assembly includes a fixing seat and a second motor arranged on the fixing seat, and the second motor is connected to the mounting plate via a second screw rod.

[0016] Preferably, the material fixing assembly is slidably arranged on the crossbeam, and the material fixing assembly can slide between the upper folding knife assembly and the lower folding knife assembly, the laser cutting assembly, and the sewing assembly.

[0017] Preferably, a pallet circulation assembly is slidingly provided on the crossbeam, and the pallet circulation assembly includes a pallet arranged on the workbench, and the pallet circulation assembly can drive the pallet to move to the workbench below the upper folding knife assembly.

[0018] The beneficial effects of the present invention are:

[0019] The upper folding knife assembly descends to the pocket after cutting, and the front folding knife and the rear folding knife move forward and backward to fold the flanges on the front and back sides of the pocket, and the upper left folding knife and the upper right folding knife descend synchronously with the fixed plate to fold the arc-shaped flanges on the left and right sides of the pocket downward, and then the lower left folding knife and the lower right folding knife of the lower folding knife assembly move horizontally left and right to further fold the left and right flanges folded downward and press the folded arc-shaped flanges to shape them, so that the arc-shaped flanges on the left and right sides can be folded and shaped to fit the pocket, and then the upper left folding knife and the upper right folding knife, the lower left folding knife and the lower right folding knife perform two-stage folding on the flanges on the left and right sides of the pocket, so as to avoid the arc-shaped flanges on the left and right sides of the pocket rebounding when the knife is withdrawn, thereby ensuring the quality of subsequent sewing of the arc-shaped pockets on the left and right sides;

[0020] The present invention is particularly suitable for the forming and sewing of circular pockets. The upper left folding knife and the upper right folding knife, as well as the lower left folding knife and the lower right folding knife cooperate with each other to cope with the curvature processing of the side edges of the circular pockets, which not only ensures the smoothness and flatness when folding the bags, but also avoids the phenomenon of material falling off at the arc-shaped folding edges when the folding knives are withdrawn. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a partial explosion schematic diagram of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the material metering assembly of the present invention;

[0024] Figure 4 Schematic diagram of the structure of the upper folding knife assembly of the present invention;

[0025] Figure 5 It is a partial schematic diagram of the upper folding knife assembly of the present invention;

[0026] Figure 6 Schematic diagram of the structure of the lower folding knife assembly of the present invention;

[0027] Figure 7 Schematic diagram of the cooperation between the upper right folding knife and the lower right folding knife of the present invention.

[0028] In the figure: upper folding knife assembly 1, bag folding seat 11, motor 12, screw 121, fixed plate 13, front folding knife 14, rear folding knife 15, upper left folding knife 16, upper right folding knife 17, translation cylinder 18, lifting cylinder 19, lower folding knife assembly 2, fixed seat 21, motor 2 22, screw 221, mounting plate 23, motor 3 24, gear 241, rack 25, slide plate 26, lower left folding knife 27, lower right folding knife 28, workbench 3, beam 31, material fixing assembly 4, external pressure frame 41, internal pressure frame 42, processing window 43, laser cutting assembly 5, pallet circulation assembly 6, pallet 61, sewing assembly 7. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0030] In the description of this specification, the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0031] Example 1:

[0032] like Figures 1 to 7 As shown, this embodiment discloses a bag opening machine for circular pocket processing, including a workbench 3, a sewing component 7 arranged on the workbench 3, a laser cutting component 5, a bag folding device and a material setting component 4 slidably arranged on the workbench 3, a crossbeam 31 is fixedly installed on the workbench 3, the sliding laser cutting component 5 and the bag folding device can be fixedly arranged on the crossbeam 31, and the sliding laser cutting component 5 and the bag folding device can also be slidably arranged on the crossbeam 31.

[0033] The material fixing component 4 includes an external pressure frame 41 and an internal pressure frame 42 arranged relatively to each other. The external pressure frame 41 is used to place the bag opening to be processed, and the internal pressure frame 42 is driven to press against the external pressure frame 41 and press the bag opening to be processed on the external pressure frame 41. The external pressure frame 41 and the internal pressure frame 42 are provided with processing windows 43 corresponding to the circular pocket, so that the bag opening can be cut and processed through the processing windows 43. For details, please refer to the invention patent with application number 202110846662.0: A bag opening machine and processing technology for secondary sewing and forming of pockets.

[0034] Specifically, the processing window 43 is strip-shaped and has long sides corresponding to the front and rear edges of the circular pocket and arc-shaped parts corresponding to the side edges of the circular pocket, that is, the outline of the processing window 43 is adapted to the outline of the pocket with arc-shaped sides.

[0035] The bag folding device includes an upper folding knife assembly 1 and a lower folding knife assembly 2 respectively located above and below the workbench 3. A positioning window is provided on the workbench 3, which is located below the bag folding device and corresponds to the position of the processing window 43. The upper folding knife assembly 1 and the lower folding knife assembly 2 cooperate with each other to fold the flange of the bag opening through the positioning window and the processing window 43.

[0036] The laser cutting assembly 5 is arranged on the side of the upper folding knife assembly 1, and the laser cutting assembly 5 is suspended above the workbench 3. The laser cutting assembly 5 is used to cut the bag opening with arc-shaped flanges on both sides in the processing window 43, and the sewing assembly 7 is used to sew the bag opening after the flanges are folded.

[0037] The material fixing component 4 is slidably arranged on the crossbeam 31, and the material fixing component 4 can slide between the upper folding knife component 1 and the lower folding knife component 2, the laser cutting component 5, and the sewing component 7 to realize automatic cutting, folding, and sewing of the bag opening.

[0038] Furthermore, a pallet circulation assembly 6 is slidingly provided on the crossbeam 31, and the pallet circulation assembly 6 includes a pallet 61 arranged on the workbench 3, and the pallet 61 is used to place the bag lip or zipper to be sewn to the bag opening. The pallet circulation assembly 6 can drive the pallet 61 to move to the workbench 3 below the upper folding knife assembly 1, that is, the bag lip or zipper is moved to the bottom of the bag opening fixed by the fixing assembly 4 through the pallet 61, and then the bag lip or zipper on the pallet 61 can be moved to the sewing assembly 7 together with the folded bag opening for sewing and completion of the bag opening process.

[0039] After the bag lip or zipper on the support plate 61 is sewn, the support plate circulation assembly 6 can clamp the support plate 61 and slide away from the bottom of the upper folding knife assembly 1 so that the next bag lip or zipper to be processed can be placed on the support plate 61.

[0040] A bag folding seat 11 is provided on the crossbeam 31 of the workbench 3 , the upper folding knife assembly 1 is fixed on the bag folding seat 11 , and the lower folding knife assembly 2 includes a fixing seat 21 , and the fixing seat 21 is fixed below the workbench 3 .

[0041] Specifically, the upper folding knife assembly 1 includes a lifting fixed plate 13 and a front folding knife 14, a rear folding knife 15, an upper left folding knife 16, and an upper right folding knife 17 arranged on the fixed plate 13. The front folding knife 14 and the rear folding knife 15 are driven to fold the front and rear flanges of the bag opening. For example, a translation cylinder 18 connecting the front folding knife 14 and the rear folding knife 15 can be provided on the fixed plate 13, that is, a translation cylinder 18 drives the front folding knife 14 to move to the front side, and a translation cylinder 18 drives the rear folding knife 15 to move to the rear side, so as to fold the flanges on the front and rear sides of the bag opening.

[0042] A translation assembly can also be provided under the workbench 3 so that when the front folding knife 14 and the rear folding knife 15 descend through the fixed plate 13 into the cut bag opening, the front folding knife 14 and the rear folding knife 15 are driven by the translation assembly to translate forward and backward respectively, so as to fold the flanges on the front and rear sides of the bag opening.

[0043] The operation of the front folding knife 14 and the rear folding knife 15 moving forward and backward to fold the front and rear bag opening flanges is a prior art and will not be described in detail here.

[0044] The motor 12 on the bag folding seat 11 is connected to the fixed plate 13 through a screw rod 121. The motor 12 is fixedly installed on the bag folding seat 11. The motor 12 drives the fixed plate 13 to move up and down through the screw rod 121 and drives the front folding knife 14, the rear folding knife 15, the upper left folding knife 16, and the upper right folding knife 17 to move up and down synchronously, and an action part is provided on the outer side of the upper left folding knife 16 and the upper right folding knife 17, and the shape of the action part is adapted to the contours on both sides of the processing window 43.

[0045] When the upper folding knife assembly 1 descends to the bag opening after cutting, the front folding knife 14 and the rear folding knife 15 can be driven by the translation cylinder 18 to translate back and forth to fold the flanges on the front and back sides of the bag opening, and the upper left folding knife 16 and the upper right folding knife 17 descend synchronously with the fixed plate 13, that is, the lowering displacement of the upper left folding knife 16 and the upper right folding knife 17 is utilized, and the action parts thereon press the flanges on the left and right sides to fold the arc-shaped flanges on the left and right sides of the bag opening downward.

[0046] That is, the arc-shaped flanges on the left and right sides of the bag opening are folded for the first time by the downward displacement of the upper left folding knife 16 and the upper right folding knife 17. At this time, the arc-shaped flanges on the left and right sides are folded downward and are nearly perpendicular to the bag opening body.

[0047] Furthermore, the lower folding knife assembly 2 includes a mounting plate 23 that is set to be lifted and lowered, and a lower left folding knife 27 and a lower right folding knife 28 that are laterally arranged on the mounting plate 23. A second motor 22 is provided on the fixing seat 21. The second motor 22 is connected to the mounting plate 23 through a second screw rod 221. The second motor 22 is fixedly installed on the fixing seat 21. The second motor 22 drives the mounting plate 23 to move up and down through the second screw rod 221 and drives the lower left folding knife 27 and the lower right folding knife 28 to move up and down synchronously, so as to drive the lower folding knife 27 and the lower right folding knife 28 upward to approach the bag opening after cutting through the mounting plate 23.

[0048] The mounting plate 23 is provided with a relatively sliding slide plate 26, and the number of the slide plates 26 is two and they are relatively distributed on the left and right sides of the mounting plate 23. The slide plates 26 can slide left and right on the mounting plate 23, that is, the lower left folding knife 27 and the lower right folding knife 28 are respectively installed on the two slide plates 26, and the outer sides of the lower left folding knife 27 and the lower right folding knife 28 are provided with arc-shaped protrusions that are adapted to the contours on both sides of the processing window 43, so that the left and right displacement of the lower left folding knife 27 and the lower right folding knife 28 can be realized through the slide plates 26.

[0049] Specifically, a motor three 24 is provided on the mounting plate 23, and the gear 241 of the motor three 24 engages the rack 25 and is connected to the slide 26 through the rack 25. The motor three 24 drives the lower left folding knife 27 and the lower right folding knife 28 to move left and right through the rack 25 and the slide 26.

[0050] Then, the lower left folding knife 27 and the lower right folding knife 28 are moved horizontally left and right, that is, the lower left folding knife 27 is driven to move to the left, and the lower right folding knife 28 is driven to move to the right, so as to further fold the left and right side flanges folded downward, and the arc-shaped flanges folded on the left and right sides can be pressed and shaped, so that the arc-shaped flanges on the left and right sides can be folded and shaped to fit the bag opening.

[0051] That is, the upper left folding knife 16 and the upper right folding knife 17, the lower left folding knife 27 and the lower right folding knife 28 are used to fold the flanges on the left and right sides of the bag opening in two stages to ensure the folding effect of the flanges on the left and right sides, avoid the arc-shaped flanges on the left and right sides of the bag opening from rebounding when the knife is withdrawn, and thus ensure the quality of the subsequent sewing processing of the arc-shaped pockets on the left and right sides.

[0052] Moreover, this embodiment is particularly suitable for the forming and sewing of circular pockets. The upper left folding knife 16 and the upper right folding knife 17, and the lower left folding knife 27 and the lower right folding knife 28 cooperate with each other to cope with the curvature processing of the side edges of the circular pockets, which not only ensures the smoothness and flatness when folding the bags, but also avoids the phenomenon of material falling off at the arc-shaped folding edges when the folding knives are withdrawn.

[0053] Example 2:

[0054] This embodiment also discloses a bag opening machine for processing circular pockets. The difference between this embodiment and Example 1 is that the fixed plate 13 of this embodiment is provided with a translation cylinder 18 for driving the upper left folding knife 16 and the upper right folding knife 17 to translate, and the front folding knife 14 and the rear folding knife 15 may also be connected with a translation cylinder 18, that is, the translation cylinder 18 is arranged on the fixed plate 13 and corresponds one-to-one to the front folding knife 14, the rear folding knife 15, the upper left folding knife 16, and the upper right folding knife 17.

[0055] The outer sides of the upper left folding knife 16 and the upper right folding knife 17 are provided with arc-shaped protruding working parts, and the contours of the arc-shaped protruding working parts on the upper folding knife 16 and the upper right folding knife 17 are adapted to the contours of the arc-shaped folding edges on the left and right sides of the bag opening. The translation cylinder 18 drives the upper left folding knife 16 and the upper right folding knife 17 to translate left and right, that is, one translation cylinder 18 drives the upper left folding knife 16 to move to the left, and one translation cylinder 18 drives the upper right folding knife 17 to move to the right, until the arc-shaped protruding working parts on the upper folding knife 16 and the upper right folding knife 17 abut or are close to the arc-shaped folding edges on the left and right sides, so that the folding edges on the left and right sides of the bag opening are folded downward left and right by the left and right translation of the upper folding knife 16 and the upper right folding knife 17.

[0056] Example 3:

[0057] This embodiment also discloses a bag opening machine for processing circular pockets. The difference between this embodiment and Example 2 is that the translation cylinder 18 of this embodiment is used to adjust the relative width between the upper folding knife 16 and the upper right folding knife 17 laterally, so that the upper folding knife 16 and the upper right folding knife 17 can more accurately fold the left and right arc-shaped flanges of the bag opening downward, thereby adapting to the folding of pockets of different widths.

[0058] Example 4:

[0059] This embodiment also discloses a bag opening machine for processing circular pockets. The difference between this embodiment and Example 1 is that the fixed plate 13 of this embodiment is provided with a lifting cylinder 19 for driving the upper left folding knife 16 and the upper right folding knife 17 to rise and fall. The lifting cylinder 19 drives the upper left folding knife 16 and the upper right folding knife 17 to rise and fall respectively, and the upper left folding knife 16 and the upper right folding knife 17 are arranged above the front folding knife 14 and the rear folding knife 15.

[0060] The front folding knife 14, rear folding knife 15, upper left folding knife 16 and upper right folding knife 17 of Example 1 are combined to form a rectangular frame, and the front folding knife 14, rear folding knife 15, upper left folding knife 16 and upper right folding knife 17 are driven to translate toward the periphery to realize folding the flanges on the front, back, left and right sides of the bag opening. However, through the above-mentioned arrangement, the length of the upper left folding knife 16 and the upper right folding knife 17 must be smaller than the distance between the front folding knife 14 and the rear folding knife 15. Therefore, when the upper left folding knife 16 and the upper right folding knife 17 translate left and right to abut the arc-shaped flanges on the left and right sides of the folding, the upper left folding knife 16 and the upper right folding knife 17 have limited contact with the corresponding left and right flanges.

[0061] In this embodiment, the upper left folding knife 16 and the upper right folding knife 17 are arranged above the front folding knife 14 and the rear folding knife 15. That is, after the front folding knife 14 and the rear folding knife 15 move forward and backward and fold the front and rear flanges, the upper left folding knife 16 and the upper right folding knife 17 are driven down to the bag opening after cutting by the lifting cylinder 19. At this time, the length of the upper left folding knife 16 and the upper right folding knife 17 can be set to be slightly smaller than the distance between the front folding knife 14 and the rear folding knife 15 after the forward and backward movement, so that the longer upper left folding knife 16 and the upper right folding knife 17 can better abut the folded arc-shaped flanges on the left and right sides, so as to further improve the effect of the bag opening flange.

[0062] At the same time, the lifting cylinder 19 and the lifting fixed plate 13 play a two-stage lifting role on the upper left folding knife 16 and the upper right folding knife 17, that is, the upper left folding knife 16 and the upper right folding knife 17 are driven to descend close to the bag opening with the fold through the fixed plate 13, and the upper left folding knife 16 and the upper right folding knife 17 are accurately controlled to descend through the lifting cylinder 19 to fold the left and right side flanges of the bag opening downward.

[0063] Furthermore, the lifting cylinder 19 can also be connected to the translation cylinder 18 so that the upper left folding knife 16 and the upper right folding knife 17 can have the functions of translation and lifting.

[0064] Furthermore, the folding operation of this embodiment also includes that the upper left folding knife 16 and the upper right folding knife 17 first descend to fold the folding edges of the left and right arc-shaped pockets, and then the lower left folding knife 27 and the lower right folding knife 28 rise and correspondingly abut or approach the upper left folding knife 16 and the upper right folding knife 17, and in the process of the lower left folding knife 27 and the lower right folding knife 28 moving left and right and folding, the upper left folding knife 16 and the upper right folding knife 17 rise and reset.

[0065] Example 5:

[0066] This embodiment also discloses a bag opening machine for processing circular pockets. The difference between this embodiment and embodiment 1 is that the lower left folding knife 27 and the lower right folding knife 28 of this embodiment are driven to rise and respectively abut or approach the upper left folding knife 16 and the upper right folding knife 17 that are displaced downward, and the lower left folding knife 27 and the upper left folding knife 16 are synchronously displaced to the left to fold the left flange, and the lower right folding knife 28 and the upper right folding knife 17 are synchronously displaced to the right to fold the right flange, until the upper left folding knife 16 moves to the left to the circular arc cutting edge close to the left side of the bag opening, and the upper right folding knife 17 moves to the right to the circular arc cutting edge close to the right side of the bag opening. At this time, the upper left folding knife 16 and the upper right folding knife 17 stop moving, and the lower left folding knife 27 and the lower right folding knife 28 continue to move to the left and right respectively to further fold the flanges on the left and right sides of the bag opening.

[0067] Example 6:

[0068] This embodiment also discloses a bag opening machine for processing circular pockets. The difference between this embodiment and Example 1 is that the outer sides of the lower left folding knife 27 and the lower right folding knife 28 in this embodiment are not arc-shaped protrusions. The lower left folding knife 27 and the lower right folding knife 28 can be set as folding knives with horizontal upper ends, and the length of the upper end of the folding knife is slightly larger than the length of the left and right side flanges.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bag opening machine for processing circular bags, comprising a workbench (3), a sewing assembly (7) arranged on the workbench (3), a laser cutting assembly (5), a bag folding device, and a material setting assembly (4) slidably arranged on the workbench (3), characterized in that: The material setting component (4) includes an outer pressure frame (41) and an inner pressure frame (42), and the outer pressure frame (41) and the inner pressure frame (42) are provided with processing windows (43) corresponding to the circular pockets, and the processing windows (43) are strip-shaped and have long sides corresponding to the front and rear edges of the circular pockets and arc-shaped parts corresponding to the side edges of the circular pockets; a positioning window is provided on the workbench (3) and is located below the bag folding device and corresponds to the position of the processing window (43); The bag folding device comprises an upper folding knife assembly (1) and a lower folding knife assembly (2) respectively located above and below the workbench (3); the upper folding knife assembly (1) comprises a lifting fixed plate (13) and a front folding knife (14), a rear folding knife (15), an upper left folding knife (16), and an upper right folding knife (17) arranged on the fixed plate (13); an action portion is provided on the outer side of the upper left folding knife (16) and the upper right folding knife (17); the shape of the action portion is adapted to the contours of both sides of the processing window (43); the lower folding knife assembly (2) comprises a lifting mounting plate (23) and a lower left folding knife (27) and a lower right folding knife (28) arranged on the mounting plate (23) for transverse movement.

2. A bag opening machine for round bag processing according to claim 1, characterized in that: The fixed plate (13) is provided with a translation cylinder (18) for driving the upper left folding knife (16) and the upper right folding knife (17) to translate, and arc-shaped raised action portions are provided on the outer sides of the upper left folding knife (16) and the upper right folding knife (17).

3. The bag opening machine for round bag processing according to claim 1, characterized in that: The fixed plate (13) is provided with a lifting cylinder (19) for driving the upper left folding knife (16) and the upper right folding knife (17) to move up and down.

4. The bag opening machine for round bag processing according to claim 1, characterized in that: The upper left folding knife (16) and the upper right folding knife (17) are arranged above the front folding knife (14) and the rear folding knife (15).

5. A bag opening machine for round bag processing according to any one of claims 1 to 4, characterized in that: A bag folding seat (11) is provided on the crossbeam (31) of the workbench (3), and a motor (12) on the bag folding seat (11) is connected to a fixed plate (13) via a screw (121).

6. The bag opening machine for round bag processing according to claim 1, characterized in that: The mounting plate (23) is provided with a slide plate (26) that slides relatively to each other. The lower left folding knife (27) and the lower right folding knife (28) are respectively mounted on the two slide plates (26). The outer sides of the lower left folding knife (27) and the lower right folding knife (28) are provided with arc-shaped protrusions that are adapted to the contours of both sides of the processing window (43).

7. A bag opening machine for processing round bags according to claim 6, characterized in that: A motor three (24) is provided on the mounting plate (23), and a gear (241) of the motor three (24) engages with a rack (25) and is connected to the slide plate (26) via the rack (25).

8. The bag opening machine for round bag processing according to claim 1, characterized in that: The lower folding knife assembly (2) comprises a fixing seat (21) and a second motor (22) arranged on the fixing seat (21), and the second motor (22) is connected to the mounting plate (23) via a second screw rod (221).

9. The bag opening machine for round bag processing according to claim 5, characterized in that: The material fixing assembly (4) is slidably arranged on the crossbeam (31), and the material fixing assembly (4) can slide between the upper folding knife assembly (1) and the lower folding knife assembly (2), the laser cutting assembly (5), and the sewing assembly (7).

10. The bag opening machine for round bag processing according to claim 5, characterized in that: A pallet circulation assembly (6) is slidably provided on the crossbeam (31), and the pallet circulation assembly (6) includes a pallet (61) provided on the workbench (3). The pallet circulation assembly (6) can drive the pallet (61) to move to the workbench (3) below the upper folding knife assembly (1).

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