Bag body forming device of three-dimensional bag

Abstract

The utility model discloses a bag body forming device of a three-dimensional bag, the device is used for forming a sheet material into the three-dimensional bag, the bag body forming device comprises a forming die and a bearing platform located below the forming die, the sheet material is flatly laid on the bearing platform, at least one insertion pushing mechanism is further arranged below the bearing platform, and the insertion pushing mechanism is connected with the forming die. A contact moving part is arranged on the side, close to the forming mold, of the insertion pushing mechanism and can reciprocate relative to the height direction of the forming mold. The forming mold presses the bottom face of the sheet material on the bearing platform to penetrate through the through hole to enter the space below the bearing platform, and the contact moving part of the inserting pushing mechanism is in contact fit with the outer surface of the front face on the corresponding side to drive the front face to reciprocate in the height direction of the forming mold. And the bag opening folded edges at the tops of the two side split surfaces linked with each side surface are mutually inserted in the height direction of the forming die. The insertion speed and the insertion success rate of the three-dimensional bag can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to bag body molding, in particular to a bag body molding device for a three-dimensional bag. Background Art

[0002] A three-dimensional bag is a common bag. When in use, the three-dimensional bag is usually stretched out into a cube shape. It is usually made of various materials, such as cloth, leather, plastic, paper, etc. Some common three-dimensional bags also have handles. In order to improve the practicality and durability of three-dimensional bags, more and more three-dimensional bags are equipped with inward folded edges at the bag opening. The folded edges can not only enhance the structural stability of the three-dimensional bag, but also improve the overall aesthetics of the three-dimensional bag. The folded edges at the bag opening can also provide additional protection. Take a three-dimensional handbag as an example. When the three-dimensional handbag is loaded with heavy objects, the folded edges can disperse the weight, reduce the pressure on the skin and muscles of the hands, and make the user more comfortable.

[0003] In the prior art, the production of a three-dimensional bag with a folded edge at the bag mouth generally includes the steps of sheet cutting, molding, folding the edge and fixing the folded edge. In the process of folding the bag mouth of the three-dimensional bag, common folding methods include manual folding and machine folding. In the manual folding process, the flatness and aesthetics of the folded edge at the bag mouth are poor. When machine folding is used, the bag mouth is generally folded inwardly after the molding, and an additional process is required after molding, resulting in low efficiency. In addition, when the molded three-dimensional bag is folded inwardly, it is easy to cause the folded edge of the three-dimensional bag to be torn or damaged, resulting in a low yield.

[0004] Therefore, in the prior art, when producing three-dimensional bags with bag opening folds, there are problems of low production efficiency and yield rate. Utility Model Content

[0005] The utility model aims to solve the problems of low production efficiency and yield rate in the prior art when producing three-dimensional bags with bag opening folds.

[0006] In order to solve the above technical problems, an embodiment of the utility model discloses a bag body forming device for a three-dimensional bag, which is used to form a sheet into a three-dimensional bag. The formed three-dimensional bag includes a bottom surface, and two front surfaces and two side surfaces are erected on the surrounding side of the bottom surface. Each side surface includes two side surfaces overlapping each other, and both sides of each front surface in the width direction are bent to form corresponding side surfaces, and each front surface and side surface has a bag opening folded edge at one end away from the bottom surface.

[0007] The bag forming device includes a forming mold and a receiving platform located below the forming mold. The receiving platform is flatly laid with sheet material. The middle of the receiving platform has a through hole for the forming mold to press through. The forming mold includes a bottom wall, two front walls and two side walls erected on the sides of the bottom wall. The bottom wall is adapted to the shape of the bottom surface of the three-dimensional bag, the two front walls are respectively adapted to the two front surfaces of the three-dimensional bag, and the two side walls are respectively adapted to the two side surfaces.

[0008] At least one plug-in pushing mechanism is also arranged below the receiving platform. When looking toward the plug-in pushing mechanism in the vertical direction, each plug-in pushing mechanism is located on one side of the forming mold and opposite to the front wall of the corresponding side, wherein the plug-in pushing mechanism has a contact moving part on the side close to the forming mold, and the contact moving part can move back and forth relative to the height direction of the forming mold.

[0009] The forming mold presses the bottom surface of the sheet material on the receiving platform to pass through the through hole into the space below the receiving platform. The front and side surfaces of the sheet material are bent relative to the bottom surface and surrounded and fitted to the outer periphery of the forming mold; the contact moving part of each plug-in pushing mechanism contacts and fits with the outer surface of the front surface of the corresponding side, driving the front surface to reciprocate along the height direction of the forming mold, and linking the pocket folded edges at the top of the two side surfaces of each side surface to be plugged into each other in the height direction of the forming mold.

[0010] By adopting the above technical scheme, when the molding mold presses the sheet material downward so that the sheet material surrounds and adheres to the molding mold, the contact moving part of the plug-in pushing mechanism pushes one of the front sides of the three-dimensional bag to move back and forth along the height direction of the molding mold. Specifically, the contact moving part will push one of the front sides to move downward first, and then move upward, so that the bag opening folded edge of one side surface is plugged into the inside of the other bag opening folded edge. The present application sets up a plug-in pushing mechanism and uses the contact moving part to drive one of the front sides of the three-dimensional bag to move back and forth up and down, thereby completing the plug-in of the bag opening folded edge. The plug-in speed and plug-in success rate of the bag opening folded edges at the top of the two side surfaces are improved, and the motion trajectory of the plug-in pushing mechanism is highly stable and can be adjusted according to needs.

[0011] Furthermore, the bag body forming device of the three-dimensional bag disclosed in the utility model can complete the insertion of the bag mouth folding edge of the three-dimensional bag during the forming process of the three-dimensional bag, and the insertion efficiency and success rate are relatively high. Compared with the solution in the prior art of first gluing to form a three-dimensional bag and then folding the edge, it is more efficient and has a simpler structure.

[0012] Preferably, the plug-in pushing mechanism includes a friction belt assembly, which includes a friction belt, a driving rotating wheel and a driven rotating wheel. The driving rotating wheel and the driven rotating wheel are arranged below the receiving platform at intervals and on the same side of the forming mold in the vertical direction. The friction belt is sheathed around the driving rotating wheel and the driven rotating wheel, and the contact moving part includes a friction contact part located on the side of the friction belt close to the forming mold. In addition, a driving motor is arranged on one side of the driving rotating wheel, and the driving motor drives the driving rotating wheel to reciprocate and links the friction belt to reciprocate.

[0013] By adopting the above technical solution, the plug-in pushing mechanism is set as a friction belt assembly, and the friction bag-removing assembly on the existing packaging bag forming mechanism can be used without redesigning the mechanism. It can be achieved by simply adjusting the movement stroke of the friction belt, which simplifies the equipment structure and reduces costs. The friction belt can be used to drive the front side of the three-dimensional bag to move back and forth for plug-in.

[0014] Further preferably, a plurality of negative pressure holes are arranged at intervals along the length direction of the friction belt. When the bag mouth folded edges of the side panels of the three-dimensional bag are inserted, the negative pressure holes can adsorb the front side of the three-dimensional bag, with higher adsorption stability and enhanced motion control, thereby improving the success rate of inserting the bag mouth folded edges of the two side panels.

[0015] The embodiment of the utility model also discloses a bag body forming device for a three-dimensional bag, wherein the plug-in pushing mechanism includes a moving seat and a vertical movable component located on the same side of the forming mold in the vertical direction, wherein the moving seat can be reciprocated and moved in a direction perpendicular to the front wall of the corresponding side and arranged below the receiving platform, and the vertical movable component can be moved in the height direction and arranged on the side of the moving seat close to the front wall. The vertical movable component includes a vertical driving component extending in the height direction and a contact moving part, wherein the contact moving part is arranged on the side of the moving seat close to the front wall and is transmission-connected to the power output end of the vertical driving component.

[0016] The moving seat drives the vertical movable component to approach the front wall on the corresponding side, the contact moving part contacts and fits with the front outer surface of the front wall, and the vertical driving component drives the contact moving part to reciprocate along the height direction.

[0017] By adopting the above technical solution, the movable seat and the vertical movable component are used, the control is more convenient, and the efficiency of the side insertion and the bag removal of the three-dimensional bag can be improved.

[0018] Further preferably, the contact moving part comprises at least one suction cup facing the front wall of the forming mold, and the suction end of each suction cup faces one side of the front wall and is parallel to the front wall. Moreover, the suction end of at least one suction cup is flush.

[0019] The embodiment of the utility model also discloses a bag body forming device for a three-dimensional bag, wherein the forming mold further comprises a folding opening component respectively arranged at corresponding positions of two side walls, and the folding opening component is opposite to the bag opening folding position at the top of the side. The folding opening component comprises a blowing member, which is arranged on the side wall of the forming mold, corresponding to the lower end position of the bag opening folding edge on the side in the height direction, and the blowing port of the blowing member is flush with the outer wall surface of the side wall.

[0020] By adopting the above technical solution, the folding edge opening component can open the bag folding edge of the inserted side dividing surface during the side insertion process, increase the opening angle of the bag folding edge of the inserted side dividing surface, thereby realizing the smooth insertion of the two bag folding edges, which can greatly improve the success rate of the bag folding edge insertion and further improve the yield rate of three-dimensional bag production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the sheet material disclosed in the embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a three-dimensional bag disclosed in an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a forming mold in a bag body forming device of a three-dimensional bag disclosed in an embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the three-dimensional bag when the forming mold in the bag body forming device of the three-dimensional bag disclosed in the embodiment of the utility model presses the three-dimensional bag;

[0025] Figure 5 It is a schematic diagram of the structure of the three-dimensional bag disclosed in the embodiment of the utility model when it is inserted at the side;

[0026] Figure 6 It is a schematic diagram of the partial structure of the three-dimensional bag disclosed in the embodiment of the utility model when it is inserted at the side;

[0027] Figure 7 It is a schematic diagram of the partial structure of the three-dimensional bag disclosed in the embodiment of the utility model after the side insertion is completed;

[0028] Figure 8 It is a schematic diagram of the overall structure of the bag body forming device of the three-dimensional bag disclosed in the embodiment of the utility model;

[0029] Fig. 9 It is a structural schematic diagram of a friction belt assembly of a bag body forming device of a three-dimensional bag disclosed in an embodiment of the utility model;

[0030] Fig.10 It is a partial structural schematic diagram of the vertical support member of the bag body forming device of the three-dimensional bag disclosed in the embodiment of the utility model.

[0031] Description of reference numerals:

[0032] 10. Sheet material;

[0033] 20. Three-dimensional bag;

[0034] 210, bottom surface; 220, front surface; 230, side surface; 240, side split surface; 250, bag opening fold edge;

[0035] 30. Forming mold;

[0036] 310, bottom wall; 320, front wall; 330, side wall; 340, folding opening part;

[0037] 40. Insertion and pushing mechanism; 401. Friction belt assembly;

[0038] 410, contact moving part;

[0039] 420, friction belt; 430, active rotating wheel; 440, driven rotating wheel; 450, driving motor; 460, vertical support member; 470, vertical contact portion; 480, negative pressure air duct; 490, negative pressure pipe joint;

[0040] 421, negative pressure hole;

[0041] 50. Mould driving mechanism. DETAILED DESCRIPTION

[0042] The bag opening is one of the parts of a three-dimensional bag that is most susceptible to wear and tear. By folding the bag opening, the durability of the bag opening edge can be effectively increased, extending the service life of the three-dimensional bag. Some common three-dimensional bags also have handles. In order to improve the practicality and durability of three-dimensional bags, more and more three-dimensional bags are equipped with inward folded edges at the bag opening. The folding edges can not only enhance the structural stability of the three-dimensional bag, but also improve the overall aesthetics of the three-dimensional bag.

[0043] However, the existing three-dimensional bags are generally formed by gluing the three-dimensional bags first, and then folding the bag mouth inwards. This method requires an additional process after forming, resulting in low efficiency. In addition, when the three-dimensional bags are folded inwards after forming, the folded edges of the three-dimensional bags are easily torn or damaged, resulting in a low yield.

[0044] Therefore, how to improve the production efficiency and yield rate of three-dimensional bags with bag opening folds is an urgent problem to be solved.

[0045] To this end, the present application provides a bag body forming device for a three-dimensional bag. The bag body forming device for the three-dimensional bag is provided with an insert pushing mechanism. After the sheet material is pressed and formed into a three-dimensional bag, the bag mouth fold edge of the three-dimensional bag is side-inserted through the insert pushing mechanism, thereby achieving high efficiency and high yield to produce a more beautiful three-dimensional bag.

[0046] First, the structure of the three-dimensional bag provided by this application is described: Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of the sheet 10, Figure 2 2 is a schematic diagram of the structure of a three-dimensional bag 20. The three-dimensional bag 20 disclosed in the present application is formed by pressing a sheet 10. Figure 2 The formed three-dimensional bag 20 includes a bottom surface 210, and two front surfaces 220 and two side surfaces 230 are erected around the bottom surface 210. Each side surface 230 includes two overlapping side surfaces 240. Both sides of the width direction of each front surface 220 are bent to form corresponding side surfaces 240, and each front surface 220 and side surface 240 has a bag opening fold 250 at one end away from the bottom surface 210. It should be noted that the three-dimensional bag 20 disclosed in the present application can be various common packaging bags such as paper bags, plastic bags, non-woven bags, etc.

[0047] The embodiment of the present invention discloses a bag body forming device for a three-dimensional bag, the bag body forming device comprises a forming mold 30 and a receiving platform (not shown in the figure) located below the forming mold 30. The forming mold 30 is as shown in FIG. Figure 3 As shown, the sheet material 10 is laid flat on the receiving platform, and the state of the sheet material 10 laid flat is as follows Figure 1 As shown, the middle of the receiving platform has a through hole (not shown in the figure) for the forming mold 30 to press through. Figure 4 A mold driving mechanism 50 is also provided above the molding mold 30. The mold driving mechanism 50 is used to drive the molding mold 30 to move up and down in the vertical direction and press the sheet material 10 to form. Figure 4 shown.

[0048] See also Figure 3 The molding mold 30 includes a bottom wall 310, and two front walls 320 and two side walls 330 erected on the sides of the bottom wall 310. The bottom wall 310 is adapted to the shape of the bottom surface 210 of the three-dimensional bag 20, the two front walls 320 are respectively adapted to the two front surfaces 220 of the three-dimensional bag 20, and the two side walls 330 are respectively adapted to the two side surfaces 230.

[0049] At least one plug-in pushing mechanism 40 is also arranged below the receiving platform. When looking toward the plug-in pushing mechanism 40 in the vertical direction, each plug-in pushing mechanism 40 is located on one side of the forming mold 30 and opposite to the front wall 320 of the corresponding side, wherein the plug-in pushing mechanism 40 has a contact moving portion 410 on the side close to the forming mold 30, and the contact moving portion 410 can reciprocate relative to the height direction of the forming mold 30.

[0050] See also Figure 4 After the molding die 30 presses the bottom surface 210 of the sheet 10 on the receiving platform and passes through the through hole into the space below the receiving platform, the front surface 220 and the side surface 230 of the sheet 10 are respectively bent relative to the bottom surface 210 and surround and fit the outer periphery of the molding die 30. The contact moving part 410 of each plug-in pushing mechanism 40 contacts and fits the outer surface of the front surface 220 on the corresponding side, driving the front surface 220 to reciprocate along the height direction of the molding die 30, and linking the pocket folding edges 250 at the top of the two side facets 240 of each side face 230 to be plugged into each other in the height direction of the molding die 30.

[0051] Please note that, see Figure 1 and Figure 2 , Figure 2 The three-dimensional bag 20 shown is composed of Figure 1 The sheet material 10 in the embodiment is pressed and pasted into shape, so for ease of understanding, Figure 1 and Figure 2 The bottom surface 210 , the front surface 220 , the side surface 240 and the bag opening fold 250 of the sheet material 10 and the three-dimensional bag 20 shown are marked with the same reference numerals for illustration purposes only.

[0052] For example, when the molding die 30 presses the sheet 10 downward, and the front side 220 of the sheet 10 is surrounded and fitted to the front wall 320 of the molding die 30, and the side 230 of the sheet 10 is surrounded and fitted to the side wall 330 of the molding die 30, each side 230 is composed of two side facets 240, and the two side facets 240 overlap each other, and then the contact moving part 410 of the plug-in pushing mechanism 40 contacts with one side of the front side 220 of the three-dimensional bag 20, and drives the side front side 220 and the corresponding side facet 240 to move downward first, so that the side facet 240 moving downward is misaligned with the other side facet 240, see Figure 5 ,exist Figure 5 In the state shown, the contact moving portion 410 drives one of the side front faces 220 and the two side facets 240 to move downward, and then the contact moving portion 410 of the plug-in pushing mechanism 40 drives the side front face 220 and the corresponding side facets 240 to move upward, so that the pocket fold 250 of the side facet 240 moving downward is inserted into the pocket fold 250 located above, as shown in FIG. Figure 6 and Figure 7As shown, the bag opening folded edges 250 at the overlapping parts of the two side surfaces 240 are plugged into one body, and finally the plugging of the bag opening folded edges 250 of the side surface 230 of the three-dimensional bag 20 is completed.

[0053] Those skilled in the art should understand that the plug-in pushing mechanism 40 can be a common friction belt mechanism, a cam pushing mechanism or a cylinder pushing mechanism, etc., which has a planar contact moving part 410 and can drive one side front side 220 of the sheet material 10 to move back and forth in the vertical direction.

[0054] With the above-mentioned structural design, when the molding mold 30 presses the sheet material 10 downward so that the sheet material 10 surrounds the molding mold 30, the contact moving part 410 of the plug-in pushing mechanism 40 pushes one of the front sides 220 of the three-dimensional bag 20 to move back and forth along the height direction of the molding mold 30. Specifically, the contact moving part 410 will push one of the front sides 220 to move downward first, and then move upward, so that the bag mouth fold 250 of one of the side panels 240 is plugged into the inside of the other bag mouth fold 250. In the present application, the plug-in pushing mechanism 40 controls and drives one of the front sides 220 of the three-dimensional bag 20 to move back and forth up and down to complete the plug-in speed and plug-in success rate of the bag mouth fold 250 at the top of the two side panels 240, and the movement trajectory of the plug-in pushing mechanism 40 is highly stable and can be adjusted according to needs.

[0055] Preferably, in the bag body forming device of the three-dimensional bag disclosed in the present application, the plug-in pushing mechanism 40 includes a friction belt assembly 401, see Figure 8 and Fig. 9 The friction belt assembly 401 includes a friction belt 420, a driving rotating wheel 430 and a driven rotating wheel 440. The driving rotating wheel 430 and the driven rotating wheel 440 are arranged below the receiving platform at intervals and on the same side of the forming mold 30 in the vertical direction. In this embodiment, a plurality of driven rotating wheels 440 are arranged at intervals. The friction belt 420 is arranged around the driving rotating wheel 430 and the driven rotating wheel 440. At this time, the contact moving part 410 is a friction contact part located on the side of the friction belt 420 close to the forming mold 30. In addition, a driving motor 450 is arranged on one side of the driving rotating wheel 430. The driving motor 450 drives the driving rotating wheel 430 to reciprocate and links the friction belt 420 to reciprocate.

[0056] For further information, see Fig. 9On the side close to the forming mold 30, two driven rotating wheels 440 are arranged at intervals along the height direction, and the friction contact part wrapped on the driven rotating wheel 440 and close to the side of the forming mold 30 is flat. This structural design can make the friction contact part and the forming mold 30 stably and tightly fit together. When the friction contact part of the friction belt 420 contacts the front side 220 of one side of the three-dimensional bag 20, for example, the driving motor 450 can first rotate counterclockwise to drive the friction belt 420 to rotate counterclockwise, so that the friction contact part in contact with the front side 220 moves downward, driving the front side 220 of the three-dimensional bag 20 to move downward, and then the driving motor 450 rotates clockwise to drive the friction belt 420 to rotate clockwise, so that the friction contact part in contact with the front side 220 moves upward, driving the front side 220 of the three-dimensional bag 20 to move upward, so that the bag mouth folding edges 250 of the two overlapping side faces 240 are plugged into each other, completing the forming of the three-dimensional bag 20 and the plugging of the bag mouth folding edges 250.

[0057] Preferably, in an implementation method disclosed in the present embodiment, the friction belt 420 is configured as a synchronous belt, and the inner side of the synchronous belt is provided with belt teeth that mesh with the active rotating wheel 430 and the driven rotating wheel 440 for transmission, and the side of the synchronous belt facing the molding mold 30 is a flat belt. With such a structure, when the active rotating wheel 430 and the driven rotating wheel 440 rotate, they can drive the friction belt 420 to rotate, and the flat belt on the side of the synchronous belt facing the molding mold 30 contacts the front side 220 of the three-dimensional bag 20. The friction belt 420 can also be configured as a toothed belt or other belt types, and the present embodiment does not make specific limitations on this.

[0058] With this structural design, the plug-in pushing mechanism 40 is set as a friction belt assembly 401, and the friction bag-removing assembly on the existing packaging bag forming mechanism can be used without redesigning the mechanism. It can be achieved by simply adjusting the movement stroke of the friction belt 420, which simplifies the equipment structure and reduces costs. The friction belt 420 can be used to drive the front side 220 of the three-dimensional bag 20 to move back and forth for plugging.

[0059] Further preferably, in order to improve the adsorption of the friction belt 420, a plurality of negative pressure holes 421 are arranged at intervals along the length direction of the friction belt 420. When the bag mouth fold 250 of the side dividing surface 240 of the three-dimensional bag 20 is plugged in, the negative pressure holes 421 can adsorb one side of the front side 220 of the three-dimensional bag 20, and the adsorption stability is higher and the motion control can be enhanced, thereby improving the success rate of plugging in the bag mouth fold 250 of the two side dividing surfaces 240.

[0060] Specifically, see Fig. 9The friction belt assembly 401 further includes a vertical support member 460, the active rotating wheel 430 and the driven rotating wheel 440 are rotatably arranged on the vertical support member 460, the friction belt 420 is movably surrounded by the outer periphery of the vertical support member 460, and a vertical contact portion 470 is arranged on the side of the vertical support member 460 close to the forming mold 30, and the vertical contact portion 470 extends in the height direction and is parallel to the front wall 320. The vertical contact portion 470 is parallel to the front wall 320, and the friction belt 420 is movably pressed against one side of the vertical contact portion 470, which can ensure that the friction belt 420 and the front face 220 of the three-dimensional bag 20 are in close contact.

[0061] A negative pressure air duct 480 extending in the height direction and opening toward the molding die 30 is provided on the side of the vertical contact portion 470 facing the molding die 30. The friction belt 420 is provided with a plurality of negative pressure holes 421 spaced apart along the length direction of the friction belt 420. Each negative pressure hole 421 penetrates the friction belt 420 along the thickness direction of the friction belt 420. Moreover, in the width direction, the opening size of the negative pressure air duct 480 is smaller than the outline size of the friction belt 420. The friction belt 420 covers the negative pressure air duct 480, and the negative pressure holes 421 of the friction belt 420 covering the negative pressure air duct 480 are connected to the negative pressure air duct 480. For further information, please refer to Fig. 9 A negative pressure pipe joint 490 connected to the negative pressure air duct 480 is also provided on one side of the vertical support member 460.

[0062] For details, see Fig.10 , the width dimension of the negative pressure air duct 480 needs to be set to be smaller than the vertical contact portion 470. For example, when the width dimension of the vertical contact portion 470 is 30 mm, the width dimension of the negative pressure air duct 480 can be set to be in the range of 10~20 mm, such as 10 mm, 15 mm, 20 mm, etc. The width dimension of the friction belt 420 is equal to or slightly larger than the width dimension of the vertical contact portion 470, such as 30 mm, 31 mm, etc., and at least the friction belt 420 needs to cover the negative pressure air duct 480. Furthermore, the negative pressure hole 421 on the friction belt 420 covering the negative pressure air duct 480 is connected to the negative pressure air duct 480. With such a structure, it can be ensured that when the friction contact portion of the friction belt 420 contacts the front side 220 of the three-dimensional bag 20, the negative pressure hole 421 located on the friction contact portion adsorbs the front side 220, so that the front side 220 and the friction contact portion are tightly fitted and contacted together. It should be further explained that the dimensions of the vertical contact portion 470 , the negative pressure air duct 480 , the friction belt 420 , etc., and the number and spacing of the negative pressure holes 421 can all be designed and adjusted according to actual needs, and this embodiment does not make the sole limitation thereto.

[0063] It should be further explained that, when a negative pressure air duct 480 is provided on the side of the vertical contact portion 470 facing the molding mold 30, the friction belt 420 should cover the negative pressure air duct 480 and make the negative pressure hole 421 and the negative pressure air duct 480 connected. When the friction belt 420 is to be set as a synchronous belt, the inner side wall of the synchronous belt should not only be in close contact with the vertical contact portion 470 to avoid air leakage between the negative pressure air duct 480 and the synchronous belt, but also have belt teeth on the synchronous belt for meshing transmission with the active rotating wheel 430 and the driven rotating wheel 440. Therefore, it is preferred to set the belt teeth on both sides of the friction belt 420, which will not affect the contact between the friction belt 420 and the negative pressure air duct 480, and can also meet the meshing of the friction belt 420 and the active rotating wheel 430 and the driven rotating wheel 440.

[0064] When the belt teeth are arranged on both sides of the friction belt 420, in one implementation, raised belt teeth may be arranged on both sides of the friction belt 420, and recessed meshing teeth are arranged at the positions corresponding to the vertical contact portion 470 (on both sides of the negative pressure air duct 480). In another implementation, recessed belt teeth may be arranged on both sides of the friction belt 420, and raised meshing teeth are arranged at the positions corresponding to the vertical contact portion 470 (on both sides of the negative pressure air duct 480). Alternatively, the width of the friction belt 420 is arranged to be greater than the width of the vertical contact portion 470, the portion of the friction belt 420 and the vertical contact portion 470 is a plane, and belt teeth are arranged on both sides for meshing transmission with the active rotating wheel 430 and the driven rotating wheel 440. Those skilled in the art may also arrange it to other structures according to actual needs, and this embodiment does not specifically limit this.

[0065] Further preferably, see Figure 8 Two groups of friction belt assemblies 401 are arranged below the receiving platform and on one side corresponding to each front wall 320, and the two groups of friction belt assemblies 401 located on the same side are arranged side by side and spaced apart in the width direction.

[0066] It should be noted that two groups of friction belt assemblies 401 are arranged on the same side of the front wall 320 and are arranged side by side and spaced apart in the width direction. When contacting the front face 220 of the three-dimensional bag 20 and moving back and forth, the contact and adsorption effects are better, and the front face 220 and the corresponding side face 240 can be driven to move back and forth in the height direction more stably.

[0067] It should be noted that when two sets of friction belt assemblies 401 are provided on one side corresponding to each front wall 320, during the side insertion molding process, refer to Figure 8, it can be that the friction belt assembly 401 located on the left side of the molding die 30 moves back and forth, or it can be that the friction belt assembly 401 located on the right side of the molding die 30 moves back and forth. Furthermore, it can also be that the friction belt assemblies 401 located on both sides of the molding die 30 move back and forth in an offset manner. Those skilled in the art can adjust the design according to actual needs, and this embodiment does not make a sole limitation to this.

[0068] Furthermore, when the side insertion of the three-dimensional bag 20 is completed and the two side surfaces 240 of each side surface 230 of the three-dimensional bag 20 are bonded together, the friction belt 420 of the friction belt assembly 401 located on both sides of the molding mold 30 moves downward to complete the bag removal action.

[0069] More specifically, to improve the success rate of side insertion, see Figure 3 The forming mold 30 further includes hem opening components 340 respectively disposed at corresponding positions of the two side walls 330, and the hem opening components 340 are located opposite to the bag opening hem 250 at the top of the side 230. The hem opening components 340 include a blowing member, which is disposed on the side wall 330 of the forming mold 30, corresponding to the lower end position of the bag opening hem 250 of the side 230 in the height direction, and the blowing port of the blowing member is flush with the outer wall surface of the side wall 330.

[0070] With this structural design, the fold opening component 340 can open the bag mouth fold 250 of the inserted side dividing surface 240 during the side insertion process, increase the opening angle of the bag mouth fold 250 of the inserted side dividing surface 240, thereby achieving smooth insertion of the two bag mouth folds 250, which can greatly improve the success rate of the insertion of the bag mouth fold 250 and further improve the yield rate of the three-dimensional bag 20.

[0071] In another preferred embodiment of the bag body forming device of the three-dimensional bag disclosed in the present application, the plug-in pushing mechanism 40 can also be configured as a movable seat and a vertical movable component (not shown in the figure) located on the same side of the forming mold 30 in the vertical direction.

[0072] Specifically, the moving seat can be reciprocated and moved in a direction perpendicular to the front wall 320 on the corresponding side and is arranged below the receiving platform, and the vertical movable assembly can be movably arranged in the height direction on the side of the moving seat close to the front wall 320. Among them, the vertical movable assembly includes a vertical driving component extending in the height direction and a contact moving part 410, and the contact moving part 410 is arranged on the side of the moving seat close to the front wall 320 and is transmission-connected with the power output end of the vertical driving component.

[0073] The movable seat drives the vertical movable component to approach the front wall 320 on the corresponding side, and the contact movable part 410 contacts and fits with the outer surface of the front 220 on the front wall 320. The vertical driving component drives the contact movable part 410 to reciprocate along the height direction, further driving one side of the front 220 of the three-dimensional bag 20 and the corresponding side dividing surface 240 to reciprocate and complete the insertion.

[0074] This structural design uses a movable seat and a vertical movable component, which makes control more convenient. Specifically, after the molding mold 30 presses the sheet 10 to form a three-dimensional bag 20, the contact movable part 410 on one side of the movable seat contacts the front side 220 of the three-dimensional bag 20, and then the vertical driving component drives the contact movable part 410 to move back and forth to complete the side insertion. After the side insertion is completed, the movable seat and the vertical driving component retreat, and then the bag stripping belt is used to strip the bag. In this implementation method, the plug-in pushing mechanism 40 and the bag stripping belt work independently and will not interfere with each other, thereby improving the side insertion efficiency and bag stripping efficiency of the three-dimensional bag 20.

[0075] Specifically, the vertical movable component can be a common linear motor, telescopic rod, cylinder, drive motor and vertical guide rail, etc. For example, when it is set as a linear motor, the output end of the linear motor is connected to the contact moving part 410 and drives the contact moving part 410 to move back and forth. Or when it is set as a telescopic rod, the output end of the telescopic rod is connected to the contact moving part 410 and drives the contact moving part 410 to move back and forth. Those skilled in the art can design and select according to actual needs, and this embodiment does not make specific limitations on this.

[0076] Further preferably, the contact moving part 410 includes at least one suction cup facing the front wall 320 of the forming mold 30, and the suction end of each suction cup faces one side of the front wall 320 and is parallel to the front wall 320. In addition, the suction end of at least one suction cup is flush, for example, 1, 2 or even more suction cups are provided. With this structural design, the suction cup can be provided to absorb one side of the front face 220 of the three-dimensional bag 20, and the suction stability is higher and the motion control can be enhanced, thereby improving the plugging success rate of the bag opening fold 250 of the two side facets 240.

[0077] Further preferably, the vertical driving component comprises a driving motor 450 drivingly connected to the contact moving part 410, and a vertical guide rail extending in the height direction. Alternatively, the vertical driving component comprises a telescopic cylinder extending in the height direction.

[0078] Further preferably, the contact moving part 410 includes a suction plate (not shown) facing the front wall 320 of the molding die 30, and the suction plate extends parallel to the front wall 320. In addition, a plurality of negative pressure holes 421 are arranged in an array on the suction plate, and each negative pressure hole 421 is connected to a negative pressure gas source. In addition, a flexible contact layer is provided on one side of the suction plate close to the front wall 320.

[0079] With the above-mentioned structural design, after the molding die 30 presses the sheet material 10 into the three-dimensional bag 20, the contact moving part 410 contacts one side of the front side 220 of the three-dimensional bag 20, and then the vertical driving component drives the contact moving part 410 to move back and forth to complete the side insertion. After the side insertion is completed, the moving seat and the vertical driving component retreat. In this implementation method, the plug-in pushing mechanism 40 and the bag-removing belt work independently and will not interfere with each other, thereby improving the side insertion efficiency of the three-dimensional bag 20 and the bag-removing efficiency.

[0080] It should be noted that, in addition to the implementation methods of the utility model described in the above-mentioned specific specific embodiments, those skilled in the art can easily understand other advantages and functions of the utility model from the contents disclosed in this specification. Although the description of the utility model is introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide an in-depth understanding of the utility model, the above description contains many specific details, and the utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0081] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0082] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0083] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0084] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0085] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A bag body forming device for a three-dimensional bag, used for forming a sheet into a three-dimensional bag, the three-dimensional bag comprising a bottom surface, two front surfaces and two side surfaces erected on the periphery of the bottom surface, each of the side surfaces comprising two overlapping side surfaces, both sides of each of the front surfaces in the width direction are bent to form corresponding side surfaces, and each of the front surfaces and the side surfaces has a bag opening folded edge at one end away from the bottom surface; characterized in that The bag forming device comprises a forming mold and a receiving platform located below the forming mold, the sheet material is laid flat on the receiving platform, and a through hole is provided in the middle of the receiving platform for the forming mold to press through; in The molding die comprises a bottom wall, and two front walls and two side walls erected on the periphery of the bottom wall, the bottom wall is adapted to the shape of the bottom surface of the three-dimensional bag, the two front walls are respectively adapted to the two front surfaces of the three-dimensional bag, and the two side walls are respectively adapted to the two side surfaces; and At least one plug-in push mechanism is also arranged below the receiving platform. When looking toward the plug-in push mechanism in the vertical direction, each of the plug-in push mechanisms is located on one side of the forming mold and is opposite to the front wall of the corresponding side. The plug-in push mechanism has a contact moving portion on one side close to the forming mold, and the contact moving portion can reciprocate relative to the height direction of the forming mold. The molding die presses the bottom surface of the sheet material on the receiving platform to pass through the through hole into the space below the receiving platform, and the front and side surfaces of the sheet material are respectively bent relative to the bottom surface and surrounded and fitted to the outer periphery of the molding die; the contact moving portion of each of the plug-in pushing mechanisms contacts and fits with the outer surface of the front surface on the corresponding side, driving the front surface to reciprocate along the height direction of the molding die, and linking the bag mouth folded edges at the top of the two side surfaces of each side surface to be plugged into each other in the height direction of the molding die.

2. The three-dimensional bag forming device according to claim 1, characterized in that: The plug-in pushing mechanism comprises a friction belt assembly, and the friction belt assembly comprises a friction belt, a driving rotating wheel and a driven rotating wheel, wherein the driving rotating wheel and the driven rotating wheel are arranged below the receiving platform at intervals and on the same side of the forming mold in the vertical direction, the friction belt is circumferentially sleeved on the driving rotating wheel and the driven rotating wheel, and the contact moving portion comprises a friction contact portion located on a side of the friction belt close to the forming mold; and A driving motor is arranged on one side of the active rotating wheel, and the driving motor drives the active rotating wheel to reciprocate and drives the friction belt to reciprocate.

3. The three-dimensional bag forming device according to claim 2, characterized in that: The friction belt assembly further comprises a vertical support member, the active rotating wheel and the driven rotating wheel are rotatably arranged on the vertical support member, the friction belt is movably wrapped around the outer periphery of the vertical support member, and a vertical contact portion is arranged on a side of the vertical support member close to the forming mold, the vertical contact portion extends along the height direction and is parallel to the front wall; in A negative pressure air duct extending along the height direction and open toward the forming mold is provided on one side of the vertical contact portion facing the forming mold, and the friction belt is provided with a plurality of negative pressure holes spaced apart along the length direction of the friction belt, and each of the negative pressure holes penetrates the friction belt along the thickness direction of the friction belt; and In the width direction, the opening size of the negative pressure air duct is smaller than the outline size of the friction belt, the friction belt covers the negative pressure air duct, and the negative pressure holes of the friction belt covering the negative pressure air duct are connected to the negative pressure air duct.

4. The three-dimensional bag forming device according to claim 3, characterized in that: Two groups of the friction belt assemblies are arranged below the receiving platform and on one side corresponding to each of the front walls, and the two groups of the friction belt assemblies on the same side are arranged side by side and spaced apart along the width direction.

5. The three-dimensional bag forming device according to claim 1, characterized in that: The plug-in pushing mechanism includes a moving seat and a vertical movable component located on the same side of the forming mold in the vertical direction, the moving seat can be reciprocated and arranged below the receiving platform in a direction perpendicular to the front wall of the corresponding side, and the vertical movable component can be movably arranged on a side of the moving seat close to the front wall in the height direction; in The vertical movable assembly includes a vertical driving component extending along the height direction and the contact moving part, wherein the contact moving part is arranged on a side of the moving seat close to the front wall and is transmission-connected to a power output end of the vertical driving component; and The movable seat drives the vertical movable component to approach the front wall on the corresponding side, the contact movable part contacts and fits with the outer surface of the front side on the front wall, and the vertical driving component drives the contact movable part to reciprocate along the height direction.

6. The three-dimensional bag forming device according to claim 5, characterized in that: The vertical driving component comprises a driving motor drivingly connected to the contact moving part, and a vertical guide rail extending along the height direction; or The vertical driving component includes a telescopic cylinder extending along the height direction.

7. The three-dimensional bag forming device according to claim 5, characterized in that: The contact moving part includes at least one suction cup facing the front wall of the molding die, and the adsorption end of each suction cup faces one side of the front wall and is parallel to the front wall; and The adsorption ends of the at least one suction cup are flush.

8. The three-dimensional bag forming device according to claim 5, characterized in that: The contact moving portion includes a suction plate facing the front wall of the molding die, and the suction plate extends parallel to the front wall; and A plurality of negative pressure holes are arranged in an array on the suction plate, and each of the negative pressure holes is connected to a negative pressure gas source.

9. The three-dimensional bag forming device according to claim 8, characterized in that: A flexible contact layer is arranged on one side of the absorption plate close to the front wall.

10. The three-dimensional bag forming device according to claim 1, characterized in that: The molding die also includes hem folding opening parts respectively arranged at corresponding positions of the two side walls, and the hem folding opening parts are opposite to the hem folding positions of the bag opening at the top of the side walls; The folding opening component includes a blowing component, which is arranged on the side wall of the forming mold and corresponds to the lower end position of the bag mouth fold on the side in the height direction, and the blowing port of the blowing component is flush with the outer wall surface of the side wall.

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