Forming die of three-dimensional bag

Abstract

The utility model discloses a forming die of a three-dimensional bag, which is used for providing shape support for a bag body in the process of forming a sheet material into the three-dimensional bag, and comprises a bottom wall, a pair of support walls opposite to each other in the width direction, and a pair of side walls opposite to each other in the length direction, the forming die comprises a grabbing assembly which is arranged at the top of the corresponding side of the side faces of the pair of side split faces and can move in a reciprocating mode in the height direction of the bag body. When the three-dimensional bag is formed, the pair of front surfaces are bent relative to the bottom surface and are respectively close to the pair of supporting walls, and the pair of side surfaces are bent relative to the pair of front surfaces and are respectively close to the pair of side walls of the forming mold; the grabbing assembly grabs the top of one of the pair of side facets on the corresponding side and reciprocates in the height direction, so that the bag opening folded edges on the tops of the pair of side facets are connected in an inserted mode in the height direction, and therefore accurate inserted connection of the bag opening folded edges on the tops of the pair of side facets can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field related to the production of bag bodies, and particularly relates to a forming die for a three-dimensional bag. Background Art

[0002] A three-dimensional bag is a packaging bag with various shapes and functions, and is widely used in the packaging of various products. For example, three-dimensional bags can be used for food packaging, electronic product packaging, agricultural product packaging, etc. Moreover, there are various types of three-dimensional bags, including paper bags, kraft paper bags, non-woven bags, etc.

[0003] In the prior art, when producing a three-dimensional bag through a three-dimensional bag forming machine, in order to ensure the aesthetics and structural strength of the three-dimensional bag, generally, the bag mouth of the three-dimensional bag needs to be hemmed. Generally, the sheet material used for producing the three-dimensional bag is pre-folded inward to form a bag mouth hem. When the forming die of the three-dimensional bag forming machine forms the three-dimensional bag, since the bag mouth hems of two adjacent connecting surfaces of the three-dimensional bag need to be lapped and fixed in the width direction of the three-dimensional bag.

[0004] However, in the prior art, when the forming die of the three-dimensional bag forming machine laps and fixes the bag mouth hems of two adjacent connecting surfaces of the three-dimensional bag, it usually uses the side wall to act on the front surface of the bag body, so that the front surface pulls the connecting surface to move in the height direction. However, this production method cannot accurately control the movement of the connecting surface, and when the front surface pulls the connecting surface, the connecting surface will shift, resulting in the bag mouth hems on a pair of connecting surfaces not being accurately inserted, which not only reduces the production efficiency of the three-dimensional bag, but also makes the finished product quality of the three-dimensional bag have potential hazards.

[0005] Therefore, when the forming die in the prior art inserts the bag mouth hems of the two connecting surfaces of the three-dimensional bag, when moving the front surface of the three-dimensional bag, there is a situation where when the front surface pulls the connecting surface, the connecting surface will shift, resulting in the bag mouth hems on a pair of connecting surfaces not being accurately inserted, which not only reduces the production efficiency of the three-dimensional bag, but also makes the finished product quality of the three-dimensional bag have potential hazards. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the problem that when the forming die in the prior art inserts the bag mouth hems of the two connecting surfaces of the three-dimensional bag, when moving the front surface of the three-dimensional bag, there is a situation where when the front surface pulls the connecting surface, the connecting surface will shift, resulting in the bag mouth hems on a pair of connecting surfaces not being accurately inserted, which not only reduces the production efficiency of the three-dimensional bag, but also makes the finished product quality of the three-dimensional bag have potential hazards.

[0007] To solve the above technical problems, an embodiment of the present application discloses a forming die for a three-dimensional bag, which is used to provide shape support for the bag body during the process of forming a sheet material into a three-dimensional bag. The bag body includes a bottom surface, a pair of front surfaces oppositely arranged in the width direction of the bottom surface, and a pair of side surfaces oppositely arranged in the length direction of the bottom surface. Bag mouth flanges that are bent towards the inside of the bag body are formed at the tops of the front surfaces and each side surface; wherein, at least one of the two side surfaces includes a pair of split surfaces, the opposite ends of the pair of split surfaces overlap each other, and the bag mouth flanges at the top of the overlapping part of the pair of split surfaces are inserted into each other.

[0008] The forming die includes a bottom wall, a pair of support walls oppositely arranged in the width direction, and a pair of side walls oppositely arranged in the length direction. Among them, the bottom wall is adapted to the shape of the bottom surface, the pair of support walls are adapted to the shape of the pair of front surfaces, and the pair of side walls are adapted to the shape of the pair of side surfaces; and a grasping component that can reciprocate in the height direction of the bag body is arranged at the top of the corresponding side of the side surface including the pair of split surfaces; wherein, when the three-dimensional bag is being formed, the pair of front surfaces are bent relative to the bottom surface and respectively approach the pair of support walls, the pair of side surfaces are bent relative to the pair of front surfaces and respectively approach the pair of side walls of the forming die, and the grasping component grasps the top of one of the split surfaces of the pair of split surfaces on the corresponding side and reciprocates in the height direction, so that the bag mouth flanges at the top of the pair of split surfaces are inserted into each other in the height direction.

[0009] With the above technical solution, when the three-dimensional bag is being formed, the pair of front surfaces are bent relative to the bottom surface and respectively approach the pair of support walls and fit with their corresponding support walls, the pair of side surfaces are bent relative to the pair of front surfaces and respectively approach the pair of side walls of the forming die and fit with their corresponding side walls, and then the grasping component grasps the top of one of the split surfaces of the pair of split surfaces on the corresponding side and moves downward in the height direction, and causes a height difference to be generated between the tops of the pair of split surfaces in the height direction. Then the grasping component moves upward, so that the bag mouth flanges at the top of the pair of split surfaces are inserted into each other in the height direction; during this process, since the top of one of the split surfaces of the pair of split surfaces is grasped by the grasping component, so that it moves, the movement path of one of the split surfaces is limited by the grasping component. Furthermore, when a height difference is generated between the pair of split surfaces in the height direction and then one of the split surfaces is moved so that the bag mouth flanges at the top of the pair of split surfaces are inserted into each other, because the grasping component directly grasps one of the split surfaces, the movement path of one of the split surfaces is limited, so that the bag mouth flanges at the top of the pair of split surfaces can be accurately inserted into each other, thereby improving the production efficiency and the yield rate of the three-dimensional bag.

[0010] Further, in an embodiment of a forming mold for a three-dimensional bag, when viewed in the length direction, the grasping assembly protrudes outward from the side wall on the corresponding side of the forming mold and is located above one of the pair of side dividing surfaces that is closer to the forming mold in the height direction; and, during the forming process of the three-dimensional bag, the grasping assembly grasps the bag mouth hem at the top of one of the pair of side dividing surfaces that is closer to the forming mold, and drives the bag mouth hem at the top of one side dividing surface to move in the height direction to be inserted into the bag mouth hem at the top of the other side dividing surface in the height direction.

[0011] With the above technical solution, since the grasping assembly protrudes outward from the side wall on the corresponding side of the forming mold, when the bag mouth hems at the tops of the pair of side dividing surfaces are inserted into each other, since the bag mouth hem of each side dividing surface is not bonded, it will tilt at a certain angle. Therefore, by grasping above one of the side dividing surfaces that is closer to the forming mold with the grasping assembly, the grasping assembly can be prevented from affecting the other side dividing surface far from the forming mold, which is more convenient for the bag mouth hems of the pair of side dividing surfaces to be inserted into each other.

[0012] Further, in an embodiment of a forming mold for a three-dimensional bag, both sides of the bag body each include a pair of side dividing surfaces, and grasping assemblies are provided at the tops of both sides of the forming mold in the length direction.

[0013] With the above technical solution, when forming a bag body whose both sides each include a pair of side dividing surfaces, since grasping assemblies are provided at the tops of both sides of the forming mold in the length direction, the bag mouth hems of the pair of side dividing surfaces corresponding to each side can be overlapped with each other simultaneously, thereby improving the forming efficiency of the bag body.

[0014] Further, in an embodiment of a forming mold for a three-dimensional bag, one of the pair of support walls can reciprocally move relative to the bottom wall in the height direction, the other support wall is fixed relative to the bottom wall, and there is a grasping gap between the relative edges of one support wall and the two side walls in the width direction; and, grasping assemblies are respectively provided on both sides of the inner wall of one support wall in the length direction, and the grasping portions of the grasping assemblies protrude from the corresponding grasping gaps when viewed in the length direction.

[0015] By adopting the above technical solution, when the top folded edges of a pair of side facets on each side are plugged into each other, the grabbing components on both sides of the inner wall of a support wall in the length direction respectively grab the corresponding side facets closer to the forming mold, and a support wall can move downward in the height direction relative to the bottom wall while driving the grabbing component to move downward and linking a side facet to move downward, and then a support wall can move upward in the height direction relative to the bottom wall while driving the grabbing component to move upward and linking a side facet to move upward, so that the bag opening folded edges of the top of a pair of side facets on each side are plugged into each other. In this process, since a front face that fits with it is driven to move by a support wall, the risk of a side facet grabbed by the grabbing component being pulled by a front face that is fixedly connected to it during the movement process is avoided, so that the grabbing component is separated from the grabbed side facet.

[0016] Furthermore, in an embodiment of a forming mold for a three-dimensional bag, each grabbing component includes a grabbing drive member, a clamping member serving as a grabbing portion, and a clamping transmission member arranged between the grabbing drive member and the clamping member; wherein the grabbing drive member is fixedly arranged on the inner wall surface of a supporting wall, located at the lower part of the corresponding side; the clamping member is arranged on the inner wall surface of a supporting wall, located at the upper part of the corresponding side; and the clamping transmission member extends along the height direction, transmission-connecting the grabbing drive member and the clamping member.

[0017] In addition, during the forming process of the three-dimensional bag, the grabbing driving member drives the clamping transmission member, and the linkage clamping member clamps the bag opening fold at the top of one of the pair of side faces that is closer to the forming mold.

[0018] By adopting the above technical scheme, when the pocket folded edges at the top of a pair of side panels on each side are plugged into each other, the grabbing driving member drives the clamping transmission member and links the clamping member to clamp the pocket folded edge at the top of a side panel closer to the forming mold, so that the pocket folded edge at the top of a side panel closer to the forming mold will not curl up, making it easier for the pocket folded edges of a side panel closer to the forming mold and the other side panel away from the forming mold to be plugged into each other.

[0019] Furthermore, in an embodiment of a forming mold for a three-dimensional bag, the forming mold further includes a supporting wall driving component and a supporting wall transmission component disposed between a supporting wall and the supporting wall driving component.

[0020] Among them, the supporting wall driving component is fixedly arranged in the forming mold, one end of the supporting wall transmission component is transmission connected to the driving end of the supporting wall driving component, and the other end is transmission connected to the inner wall surface of a supporting wall; and during the forming process of the three-dimensional bag, the supporting wall driving component drives the supporting wall transmission component and links a supporting wall to reciprocate along the height direction.

[0021] With the above technical solution, during the forming process of the three-dimensional bag, in the length direction, the grasping components on both sides of the inner wall of a support wall respectively grasp a corresponding side split surface closer to the forming die, and the support wall driving member drives the support wall transmission member to link a support wall to move downward in the height direction and drive the grasping components to move downward; then the support wall driving member drives the support wall transmission member to link a support wall to move upward in the height direction and drive the grasping components to move upward, so that the bag mouth flanges at the top of a pair of side split surfaces on each side are inserted into each other.

[0022] Further, in an embodiment of the forming die of a three-dimensional bag, the forming die further includes a top wall disposed opposite to the bottom wall; wherein, when viewed in the height direction of the forming die, the outer wall surface of any one of a pair of support walls is within the edge contour of the top wall; and, the inner wall surface of the top wall is provided with a mounting seat extending towards the inside of the forming die.

[0023] With the above technical solution, by providing the top wall, it is possible to prevent sundries from falling into the forming die in the height direction during the forming process of the three-dimensional bag; by providing the mounting seat, it is convenient to mount the forming die on the forming machine of the three-dimensional bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the three-dimensional bag provided by an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of the forming die of the three-dimensional bag provided by an embodiment of the present invention;

[0026] Figure 3 It is a partial schematic diagram of the forming die of the three-dimensional bag provided by an embodiment of the present invention with one side wall removed;

[0027] Figure 4 It is a partial schematic diagram of the three-dimensional bag provided by an embodiment of the present invention when a pair of side split surfaces on the side of the three-dimensional bag are not inserted into each other and have a height difference in the height direction;

[0028] Figure 5 It is a partial schematic diagram of the three-dimensional bag provided by an embodiment of the present invention after a pair of side split surfaces on the side of the three-dimensional bag are inserted into each other;

[0029] Figure 6 It is a partial schematic diagram of the forming die of the three-dimensional bag provided by an embodiment of the present invention, showing the structure of the grasping components;

[0030] Figure 7 It is a schematic diagram of the structure of the grasping components of the forming die of the three-dimensional bag provided by an embodiment of the present invention;

[0031] Figure 8 Structural schematic diagram of the jaw provided by the embodiment of the present utility model.

[0032] Explanation of reference numerals:

[0033] 1, three-dimensional bag;

[0034] 10, bag body;

[0035] 100, front side; 110, side surface; 120, bottom surface; 130, side dividing surface; 140, bag mouth hem;

[0036] 2, forming die;

[0037] 20, bottom wall;

[0038] 21, side wall;

[0039] 22, support wall;

[0040] 23, grasping assembly;

[0041] 230, grasping drive member; 231, clamping member; 232, clamping transmission member; 233, drive cylinder; 234, rack; 235, jaw; 236, tooth; 237, fixed seat; 238, sliding seat;

[0042] 24, support wall drive member;

[0043] 240, support wall drive cylinder;

[0044] 25, support wall transmission member;

[0045] 250, telescopic rod; 251, connecting seat;

[0046] 26, support wall guiding component;

[0047] 260, guiding piece; 261, guide rail;

[0048] 27, top wall; 28, mounting seat; 29, substrate;

[0049] L, length direction; W, width direction; H, height direction. Detailed implementation manners

[0050] As described in the background art, when the bag mouth flanges of two adjacent connecting surfaces of a three-dimensional bag are lapped and fixed by a forming die of a three-dimensional bag forming machine in the prior art, the side wall is usually used to act on the front surface of the bag body, so that the front surface pulls the connecting surface to move in the height direction. However, this production method cannot accurately control the movement of the connecting surface, and when the front surface pulls the connecting surface, the connecting surface will shift, resulting in the bag mouth flanges on a pair of connecting surfaces being unable to be accurately inserted. This not only reduces the production efficiency of the three-dimensional bag, but also makes the finished product quality of the three-dimensional bag have potential hazards.

[0051] To solve the above problems, the present utility model provides a forming die for a three-dimensional bag. When the three-dimensional bag is being formed, a pair of front surfaces are bent relative to the bottom surface and approach a pair of support walls respectively and fit with their corresponding support walls, a pair of side surfaces are bent relative to the pair of front surfaces and approach a pair of side walls of the forming die respectively and fit with their corresponding side walls. Then, the grasping assembly grasps the top of one side surface of a pair of side surfaces on the corresponding side and moves downward in the height direction, and makes the tops of the pair of side surfaces have a height difference in the height direction. Then, the grasping assembly moves upward so that the bag mouth flanges at the tops of the pair of side surfaces are inserted into each other in the height direction; during this process, since the top of one side surface of the pair of side surfaces is grasped by the grasping assembly, so that it moves, and during this process, the movement path of one side surface is defined by the grasping assembly, so that when a height difference is generated between the pair of side surfaces in the height direction, and then one side surface is moved so that the bag mouth flanges at the tops of the pair of side surfaces are inserted into each other, the bag mouth flanges at the tops of the pair of side surfaces can be accurately inserted, thereby improving the production efficiency and the finished product rate of the three-dimensional bag.

[0052] To make the purpose, technical solution and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

[0053] First, the structure and setting method of the three-dimensional bag 1 will be further explained.

[0054] As Figure 1 shown, the three-dimensional bag 1 includes a bag body 10 having an accommodation cavity. The bag body 10 includes a bottom surface 120, a pair of front surfaces 100 oppositely arranged in the width direction W of the bottom surface 120, and a pair of side surfaces 110 oppositely arranged in the length direction L of the bottom surface 120. Bag mouth flanges 140 that are bent toward the inside of the bag body 10 are formed at the tops of the front surface 100 and each side surface 110; wherein, at least one of the two side surfaces 110 includes a pair of side surfaces 130, the opposite ends of the pair of side surfaces 130 overlap each other, and the bag mouth flanges 140 at the top of the overlapping part of the pair of side surfaces 130 are inserted into each other.

[0055] Specifically, by forming a bag mouth hem 140 that bends inward toward the inside of the bag body 10 at the top of the front surface 100 and each side surface 110, this can not only increase the strength and durability of the bag mouth, but also the bag mouth hem 140 can provide additional support for the closure of the bag mouth, and the bag mouth hem 140 can make the edge of the bag mouth neat and smooth, improving the overall aesthetics of the three-dimensional bag 1.

[0056] Optionally, in one embodiment, to facilitate carrying this three-dimensional bag 1, a handle is fixedly provided on the bag body 10, thereby facilitating carrying this three-dimensional bag 1.

[0057] The overall structure of this forming mold 2 will be further explained below.

[0058] Please refer to Figure 2 and Figure 3 , a forming mold 2 for a three-dimensional bag 1, which provides shape support for the bag body 10 during the process of forming a sheet material into a three-dimensional bag 1. The forming mold 2 includes a bottom wall 20, a pair of support walls 22 opposite to each other in the width direction W, and a pair of side walls 21 opposite to each other in the length direction L. Among them, the bottom wall 20 is adapted to the shape of the bottom surface 120, the pair of support walls 22 is adapted to the shape of the pair of front surfaces 100, and the pair of side walls 21 is adapted to the shape of the pair of side surfaces 110; and, the forming mold 2 is located at the top of the corresponding side of the side surface 110 including a pair of side split surfaces 130, and is provided with a grasping component 23 that can reciprocally move along the height direction H of the bag body 10; wherein, when the three-dimensional bag 1 is being formed, the pair of front surfaces 100 are bent relative to the bottom surface 120 and respectively approach the pair of support walls 22, the pair of side surfaces 110 are bent relative to the pair of front surfaces 100 and respectively approach the pair of side walls 21 of the forming mold 2, and the grasping component 23 grasps the top of one side split surface 130 of the pair of side split surfaces 130 on the corresponding side and reciprocally moves along the height direction H, so that the bag mouth hems 140 at the tops of the pair of side split surfaces 130 are inserted into each other in the height direction H.

[0059] Specifically, the working principle of this forming mold 2 is as follows: When the three-dimensional bag 1 is being formed, in the height direction H, the sheet material located below the forming mold 2 is pressed by the bottom wall 20, the pair of front surfaces 100 are bent relative to the bottom surface 120 and respectively approach the pair of support walls 22 and fit with their corresponding support walls 22, the pair of side surfaces 110 are bent relative to the pair of front surfaces 100 and respectively approach the pair of side walls 21 of the forming mold 2 and fit with their corresponding side walls 21, and then the grasping component 23 grasps the top of one side split surface 130 of the pair of side split surfaces 130 on the corresponding side and moves downward along the height direction H, and causes a height difference to be generated between the tops of the pair of side split surfaces 130 in the height direction H (please refer to Figure 4 ), and then the grasping component 23 moves upward so that the bag mouth hems 140 at the tops of the pair of side split surfaces 130 are inserted into each other in the height direction H (please refer toFigure 5 ); During this process, since the top of one side dividing surface 130 in a pair of side dividing surfaces 130 is grabbed by the grabbing component 23, causing it to move, the movement path of one side dividing surface 130 is defined by the grabbing component 23. Furthermore, after a height difference occurs between a pair of side dividing surfaces 130 in the height direction H, when one side dividing surface 130 is moved so that the bag mouth flanges 140 at the tops of the pair of side dividing surfaces 130 are inserted into each other, because the grabbing component 23 directly grabs on one side dividing surface 130 and the movement path of one side dividing surface 130 is defined, it can be realized that the bag mouth flanges 140 at the tops of the pair of side dividing surfaces 130 can be accurately inserted into each other, thereby improving the production efficiency and the finished product rate of the three-dimensional bag 1.

[0060] It should be understood that in order to prevent the positions of the pair of front surfaces 100 from shifting after the pair of front surfaces 100 are bent relative to the bottom surface 120 and approach the pair of support walls 22 respectively and fit with their corresponding support walls 22, suction cups, suction nozzles, etc. are also provided on the pair of support walls 22 to limit the front surfaces 100.

[0061] Optionally, in an implementable embodiment, as Figure 2 shown, to facilitate the grabbing component 23 to clamp one side dividing surface 130 in a pair of side dividing surfaces 130, when viewed along the length direction L, the grabbing component 23 protrudes outward from the side wall 21 on the corresponding side of the forming die 2, and is located above the side dividing surface 130 that is closer to the forming die 2 among the pair of side dividing surfaces 130 in the height direction H; and, during the forming process of the three-dimensional bag 1, the grabbing component 23 grabs the bag mouth flange 140 at the top of the side dividing surface 130 that is closer to the forming die 2 in a pair of side dividing surfaces 130, and drives the bag mouth flange 140 at the top of one side dividing surface 130 to move along the height direction H to be inserted into the bag mouth flange 140 at the top of the other side dividing surface 130 in the height direction H.

[0062] Specifically, since the grabbing component 23 protrudes outward from the side wall 21 on the corresponding side of the forming die 2, therefore, when the bag mouth flanges 140 at the tops of the pair of side dividing surfaces 130 are inserted into each other, because the bag mouth flange 140 of each side dividing surface 130 is not bonded, it will tilt at a certain angle. Therefore, by grabbing above the side dividing surface 130 that is closer to the forming die 2 with the grabbing component 23, the grabbing component 23 will not affect the other side dividing surface 130 that is far from the forming die 2, which is more convenient for the bag mouth flanges 140 of the pair of side dividing surfaces 130 to be inserted into each other.

[0063] Furthermore, this forming die 2 also has the advantage of a wide application range; it is applicable not only to the bottom-sealed three-dimensional bag 1 but also to the side-sealed three-dimensional bag 1. It should be understood that the bottom-sealed three-dimensional bag 1 is integrally formed with one surface and the bottom surface 120, and only one pair of side dividing surfaces 130 are provided on one side surface 110 and are fixedly inserted into each other; the side-sealed three-dimensional bag 1 means that both pairs of side surfaces 110 include a pair of side dividing surfaces 130, and the two pairs of side dividing surfaces 130 are fixedly inserted into each other.

[0064] Taking the side-sealed three-dimensional bag 1 as an example below, this forming die 2 will be further explained.

[0065] Optionally, in an implementable embodiment, both side surfaces 110 of the bag body 10 include a pair of side dividing surfaces 130, and grasping components 23 are provided at the top of both sides of the forming die 2 in the length direction L.

[0066] Specifically, when forming the bag body 10 whose both side surfaces 110 include a pair of side dividing surfaces 130, since the grasping components 23 are provided at the top of both sides of the forming die 2 in the length direction L, the bag mouth flanges 140 of the pair of side dividing surfaces 130 corresponding to the two side surfaces 110 can be overlapped with each other simultaneously, thereby improving the forming efficiency of the bag body 10.

[0067] The moving mode of the grasping component 23 will be further explained below.

[0068] Optionally, in an implementable embodiment, as Figure 2 shown, one of the pair of support walls 22, i.e., a support wall 22, can reciprocally move relative to the bottom wall 20 in the height direction H, the other support wall 22 is fixed relative to the bottom wall 20, and there is a grasping gap between the relative edges of one support wall 22 and the two side walls 21 in the width direction W; and grasping components 23 are respectively provided on both sides of the inner wall of one support wall 22 in the length direction L, and when viewed in the length direction L, the grasping parts of the grasping components 23 are exposed from the corresponding grasping gap on one side.

[0069] Specifically, when the top folded edges of a pair of side panels 130 of each side surface 110 are plugged into each other, the grabbing components 23 on both sides of the inner wall of a support wall 22 in the length direction L respectively grab their corresponding side panels 130, and a support wall 22 can move downward along the height direction H relative to the bottom wall 20 while driving the grabbing component 23 to move downward and linking a side panel 130 to move downward, so that a pair of side panels 130 have a height difference in the height direction H, and then a support wall 22 can move upward along the height direction H relative to the bottom wall 20 while driving the grabbing component 23 to move upward and linking a side panel 130 to move upward, so that the bag mouth folded edges 140 at the top of a pair of side panels 130 are plugged into each other. In this process, since a front side 100 that is in contact with it is driven to move by a supporting wall 22, the risk of a side surface 130 grasped by the grasping component 23 being pulled by a front side 100 fixedly connected to it during movement, thereby preventing the grasping component 23 from detaching from the grasped side surface 130, is avoided.

[0070] The following is a further explanation of the configuration of the movement of a support wall 22.

[0071] Optionally, in a feasible implementation, as Figure 3 As shown, the forming mold 2 further includes a supporting wall driving member 24, and a supporting wall transmission member 25 disposed between a supporting wall 22 and the supporting wall driving member 24. The supporting wall driving member 24 is fixedly disposed in the forming mold 2, one end of the supporting wall transmission member 25 is drivingly connected to the driving end of the supporting wall driving member 24, and the other end is drivingly connected to the inner wall surface of a supporting wall 22; and during the forming process of the three-dimensional bag 1, the supporting wall driving member 24 drives the supporting wall transmission member 25, and links the supporting wall 22 to reciprocate along the height direction H.

[0072] Specifically, during the forming process of the three-dimensional bag 1, in the length direction L, the grabbing components 23 located on both sides of the inner wall of a supporting wall 22 respectively grab their corresponding side surfaces 130 that are closer to the forming mold 2, and drive the supporting wall transmission component 25 through the supporting wall driving component 24, linking a supporting wall 22 to move downward along the height direction H, and driving the grabbing component 23 to move downward; then the supporting wall driving component 24 drives the supporting wall transmission component 25, linking a supporting wall 22 to move upward along the height direction H, and driving the grabbing component 23 to move upward, so that the bag opening folded edges 140 at the top of a pair of side surfaces 130 of each side surface 110 are plugged into each other.

[0073] Optionally, in a feasible implementation, as Figure 2 and 3As shown in the figure, for the convenience of installing the support wall driving member 24, the forming die 2 further includes a base plate 29 disposed inside the forming die 2. The two sides of the base plate 29 in the length direction L are respectively fixedly connected to the corresponding side walls 21, and the support wall driving member 24 is fixedly installed on one side of the base plate 29 close to the top of one support wall 22. It should be understood that the fixed connection method can be screw connection, snap connection, etc., which is not limited in this embodiment.

[0074] Specifically, the structures and setting manners of the support wall driving member 24 and the support wall transmission member 25 are not limited.

[0075] Optionally, in an implementable embodiment, the support wall driving member 24 includes a pair of support wall driving cylinders 240 fixedly arranged at intervals in the length direction L inside the forming die 2. By driving one support wall 22 to move in the height direction H through the pair of support wall driving cylinders 240, one support wall 22 can move smoothly during the movement.

[0076] Moreover, the support wall transmission member 25 includes expansion rods 250 respectively arranged at the driving ends of each support wall driving cylinder 240. One end of the expansion rod 250 is drivingly connected to the driving end of the corresponding support wall driving cylinder 240, and the other end of the expansion rod 250 is rotatably connected to the inner wall surface of one support wall 22; when one support wall 22 needs to move in the height direction H, the pair of support wall driving cylinders 240 drive the respective corresponding expansion rods 250 to extend or retract, thereby driving one support wall 22 to reciprocate in the height direction H.

[0077] Optionally, in an embodiment, in order to enable the expansion rod 250 to transmit the power of the support wall driving cylinder 240 to one support wall 22, connection seats 251 corresponding to each expansion rod 250 are further arranged on the inner wall surface of one support wall 22, and the other end of the expansion rod 250 is rotatably connected to the corresponding connection seat 251.

[0078] Optionally, in another implementable embodiment, the support wall driving member 24 includes a pair of linear motors fixedly arranged at intervals in the length direction L inside the forming die 2. By driving one support wall 22 to move in the height direction H through the pair of linear motors, one support wall 22 can also move smoothly during the movement.

[0079] Moreover, the support wall transmission member 25 includes push rods respectively arranged at the driving ends of each linear motor. One end of the push rod is drivingly connected to the driving end of the linear motor, and the other end is rotatably connected to the inner wall surface of one support wall 22; when one support wall 22 needs to move in the height direction H, the pair of linear motors drive the respective corresponding push rods to extend or retract, thereby driving one support wall 22 to reciprocate in the height direction H.

[0080] Further, in an achievable implementation, as Figure 3 As shown, in order to facilitate a support wall 22 to run smoothly along the height direction H; the molding mold 2 also includes a pair of support wall guide components 26 arranged on both side ends of a support wall 22 in the length direction L; wherein, each support wall guide component 26 includes a guide member 260 extending from the inner wall surface of the corresponding one side end of a support wall 22 toward the inside of the molding mold 2, and a guide rail 261 fixed on the inner wall surface of the corresponding one side side wall 21 and extending obliquely relative to the height direction H, and the guide member 260 is slidably connected to the guide rail 261; wherein, when viewed along the length direction L, the guide rail 261 gradually approaches a support wall 22 from bottom to top.

[0081] Specifically, when a support wall 22 moves downward along the height direction H, it will gradually approach another support wall 22 fixed relative to the bottom wall 20. Therefore, by setting a guide member 260 and a guide rail 261 to gradually approach a support wall 22 from bottom to top, when a support wall 22 moves downward along the height direction H, the guide rail 261 cooperates with the guide member 260 to make a support wall 22 move along a predetermined path without deviation, and can better separate the bag fold 140 of a pair of side surfaces 130 that overlap each other, so that a pair of side surfaces 130 can be accurately plugged into each other.

[0082] More specifically, the structure and setting method of the guide member 260 are not limited, for example, it can be a guide block, a sliding block, etc. that are compatible with the guide rail 261, and this embodiment does not limit this.

[0083] The structure and arrangement of the grabbing assembly 23 are further explained below.

[0084] like Figure 3 and Figure 6 As shown, each grabbing assembly 23 includes a grabbing driving member 230, a clamping member 231 as a grabbing part, and a clamping transmission member 232 disposed between the grabbing driving member 230 and the clamping member 231; wherein the grabbing driving member 230 is fixedly disposed on the inner wall surface of a supporting wall 22, located at the lower part of the corresponding side; the clamping member 231 is disposed on the inner wall surface of a supporting wall 22, located at the upper part of the corresponding side; and the clamping transmission member 232 extends along the height direction H, and transmission connects the grabbing driving member 230 and the clamping member 231. In addition, during the forming process of the three-dimensional bag 1, the grabbing driving member 230 drives the clamping transmission member 232, and the linkage clamping member 231 clamps the bag opening fold 140 at the top of one of the pair of side facets 130 that is closer to the forming mold 2.

[0085] Specifically, when the pocket folded edges 140 at the top of a pair of side surfaces 130 of each side 110 are plugged into each other, the grabbing driving member 230 drives the clamping transmission member 232 and links the clamping member 231 to clamp the pocket folded edge 140 at the top of a side surface 130 closer to the molding mold 2, so that the pocket folded edge 140 at the top of a side surface 130 closer to the molding mold 2 will not be lifted up, which makes it easier for the pocket folded edge 140 of a side surface 130 close to the molding mold 2 and the other side surface 130 away from the molding mold 2 to be plugged into each other.

[0086] More specifically, the structure and arrangement of the grabbing component 23 are not limited.

[0087] Optionally, in a feasible implementation, as Figures 6 - 8 As shown, the grabbing driving component 230 is a driving cylinder 233; the clamping transmission component 232 includes a rack 234 extending along the height direction H and movably arranged on the inner wall surface of a support wall 22 along the height direction H; the clamping component 231 is a clamping claw 235 rotatably arranged on the inner wall surface of a support wall 22, and the peripheral side of the clamping claw 235 is provided with gear teeth 236 that are meshed with the rack 234 for transmission.

[0088] Specifically, during the forming process of the three-dimensional bag 1, when the grasping components 23 located on both sides of the inner wall surface of a supporting wall 22 respectively grasp their corresponding side surface 130 that is closer to the forming mold 2, the driving cylinder 233 drives the rack 234 to move upward along the height direction H, and then the rack 234 drives the gear teeth 236 on the side of the clamp 235 to rotate, so that the clamp 235 rotates to clamp the corresponding side surface 130 that is closer to the forming mold 2.

[0089] Optionally, in one embodiment, the clamping transmission member 232 further includes a plurality of fixed seats 237, which are fixedly mounted on a support wall 22 along the height direction H, and the rack 234 passes through each fixed seat 237 along the height direction H and is slidably connected to each fixed seat 237, and the clamping jaw 235 is rotatably connected to a fixed seat 237 close to the top of a support wall 22 among the plurality of fixed seats 237, so that the rack 234 can be moved along the height direction H by setting the fixed seat 237, and the rack 234 is limited. It should be understood that the fixed connection method can be a screw connection, etc.; the rotation connection method can be a shaft connection, etc., which is not limited in this embodiment.

[0090] Specifically, multiple fixed seats 237 are all detachable from a support wall 22. Thus, by removing the fixed seat 237 rotatably connected with the clamping jaw 235 and changing its position in the height direction H, this forming die can be adapted to fixed seats 237 with different height dimensions. It should be understood that the number of multiple fixed seats 237 can be 2, 3, 5, etc., and this embodiment does not limit it here.

[0091] Optionally, in one implementation, a sliding seat 238 arranged along the width direction W is further provided on the inner wall of a support wall 22. The sliding seat 238 can slide along the height direction H. The driving cylinder 233 of each grasping assembly 23 is in transmission connection with the sliding seat 238, and the bottom ends of the racks 234 in the height direction H are fixedly connected with the sliding seat 238. Thus, the grasping assemblies 23 located on both sides of the inner wall of a support wall 22 in the length direction L can synchronously clamp the bag mouth hem 140 at the top of each corresponding side split surface 130, so as to realize that a pair of side split surfaces 130 of each side surface 110 can be accurately inserted into each other.

[0092] Furthermore, in one implementation, to facilitate the installation of this forming die 2 onto the forming machine of the three-dimensional bag 1, the forming die 2 further includes a top wall 27 opposite to the bottom wall 20. Among them, when looking along the height direction H of the forming die 2, the outer wall surface of any one of the pair of support walls 22 is within the edge contour of the top wall 27, so as to prevent sundries from falling into the forming die 2 from the height direction H during the forming process of the three-dimensional bag 1. And, an installation seat 28 extending towards the inside of the forming die 2 is provided on the inner wall surface of the top wall 27, so as to facilitate the installation of this forming die 2 onto the forming machine of the three-dimensional bag 1.

[0093] It should be noted that except for the implementation manners of the present utility model described in the above specific embodiments, those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model is introduced in combination with the preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in combination with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details are included in the above description, and the present utility model can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the key points of the present utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and the features in the embodiments of the present utility model can be combined with each other.

[0094] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0095] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0096] Terms such as "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0097] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "connected to" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0098] Although the present utility model has been illustrated and described by referring to some preferred embodiments thereof, those of ordinary skill in the art should understand that the above content is a further detailed description of the present utility model in combination with specific embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present utility model.

Claims

1. A forming mold for a three-dimensional bag, used to provide shape support for a bag body during the process of forming a sheet into the three-dimensional bag, the bag body comprising a bottom surface, a pair of front surfaces arranged oppositely in the width direction of the bottom surface, and a pair of side surfaces arranged oppositely in the length direction of the bottom surface, the front surface and the top of each of the side surfaces are formed with a bag opening folded toward the inside of the bag body; wherein: At least one of the pair of side surfaces comprises a pair of side facets, the opposite ends of the pair of side facets overlap each other, and the bag opening folds at the top of the overlapping portions of the pair of side facets are inserted into each other; characterized in that: The molding die comprises a bottom wall, a pair of supporting walls opposite to each other in the width direction, and a pair of side walls opposite to each other in the length direction, wherein the bottom wall is adapted to the shape of the bottom surface, the pair of supporting walls are adapted to the shape of the pair of front surfaces, and the pair of side walls are adapted to the shape of the pair of side surfaces; and, The forming mold includes a pair of side surfaces, and the top of the corresponding side of the side surface is provided with a grasping component that can reciprocate along the height direction of the bag body; wherein, when the three-dimensional bag is formed, the pair of front surfaces are bent relative to the bottom surface and are respectively close to the pair of supporting walls, and the pair of side surfaces are bent relative to the pair of front surfaces and are respectively close to a pair of side walls of the forming mold, and the grasping component grasps the top of one of the pair of side surfaces on the corresponding side and reciprocates along the height direction, so that the bag opening folded edges at the top of the pair of side surfaces are plugged into each other in the height direction.

2. The three-dimensional bag forming mold according to claim 1, characterized in that: in, When viewed along the length direction, the grabbing assembly is exposed outward from the side wall of the corresponding side of the forming mold, and is located above one of the pair of side facets that is closer to the forming mold in the height direction; and During the forming process of the three-dimensional bag, the grabbing assembly grabs the bag opening folded edge at the top of one of the pair of side surfaces that is closer to the forming mold, and drives the bag opening folded edge at the top of one side surface to move along the height direction so as to be plugged into the bag opening folded edge at the top of the other side surface in the height direction.

3. The three-dimensional bag forming mold according to claim 2, characterized in that: The two side surfaces of the bag body each include a pair of side facets, and the tops of both sides of the forming mold in the length direction are provided with the grabbing components.

4. The three-dimensional bag forming mold according to claim 3, characterized in that: in, One of the pair of supporting walls is reciprocatable relative to the bottom wall in the height direction, the other supporting wall is fixed relative to the bottom wall, and opposite edges of one supporting wall and the pair of side walls have a gripping gap in the width direction; and The grabbing components are respectively arranged on both sides of the inner wall of one of the supporting walls in the length direction, and the grabbing portion of each grabbing component is exposed from the grabbing gap on the corresponding side when viewed along the length direction.

5. The three-dimensional bag forming mold according to claim 4, characterized in that: Each of the grabbing assemblies comprises a grabbing driving member, a clamping member as the grabbing portion, and a clamping transmission member disposed between the grabbing driving member and the clamping member; wherein, The grabbing driving member is fixedly arranged on the inner wall surface of the one supporting wall, located at the lower part of the corresponding side; the clamping member is arranged on the inner wall surface of the one supporting wall, located at the upper part of the corresponding side; and the clamping transmission member extends along the height direction, and transmission connects the grabbing driving member and the clamping member; and, During the forming process of the three-dimensional bag, the grabbing driving member drives the clamping transmission member, which links the clamping member to clamp the bag opening fold at the top of one of the pair of side surfaces that is closer to the forming mold.

6. The three-dimensional bag forming mold according to claim 5, characterized in that: The grabbing driving component is a driving cylinder; the clamping transmission component includes a rack extending along the height direction and movably arranged on the inner wall surface of one of the support walls along the height direction; the clamping component is a clamping jaw rotatably arranged on the inner wall surface of one of the support walls, and the peripheral side of the clamping jaw is provided with gear teeth that mesh with the rack transmission.

7. The three-dimensional bag forming mold according to claim 4, characterized in that: in, The molding die further comprises a supporting wall driving component and a supporting wall transmission component disposed between one of the supporting walls and the supporting wall driving component; wherein, The supporting wall driving member is fixedly disposed in the molding die, one end of the supporting wall transmission member is drivingly connected to the driving end of the supporting wall driving member, and the other end is drivingly connected to the inner wall surface of the one supporting wall; and, During the forming process of the three-dimensional bag, the supporting wall driving component drives the supporting wall transmission component, thereby linking the one supporting wall to reciprocate along the height direction.

8. The three-dimensional bag forming mold according to claim 7, characterized in that: in, The support wall driving member comprises a pair of support wall driving cylinders fixedly arranged in the molding die at intervals along the length direction; and The supporting wall transmission component comprises a telescopic rod respectively arranged at the driving end of each supporting wall driving cylinder, and the other end of the telescopic rod is rotatably connected to the inner wall surface of the one supporting wall.

9. The three-dimensional bag forming mold according to claim 8, characterized in that: The molding die further includes a pair of support wall guide components disposed at both side ends of the one support wall in the length direction; wherein, Each of the support wall guide components includes a guide member extending from the inner wall surface of the corresponding side end of the support wall toward the inside of the molding mold, and a guide rail fixed to the inner wall surface of the side wall on the corresponding side and extending obliquely relative to the height direction, and the guide member is slidably connected to the guide rail; wherein, When viewed along the length direction, the guide rail gradually approaches the one supporting wall from bottom to top.

10. The forming mold for a three-dimensional bag according to any one of claims 1 to 9, characterized in that: The molding die further comprises a top wall arranged opposite to the bottom wall; wherein, When viewed along the height direction of the molding die, the outer wall surface of any one of the pair of support walls is within the edge contour of the top wall; and The inner wall surface of the top wall is provided with a mounting seat extending toward the inside of the forming mold.

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