3D bag forming mold

Abstract

This case discloses a molding die for a 3D bag, used to provide shape support for the bag body during the process of forming a 3D bag from sheet material. The molding die includes a core body and a pair of pushing components movably disposed on both sides of the core body along its length. A dragging component is disposed on each pushing component, and the dragging component includes a gripping part disposed on the top of the pushing component that can reciprocate along the height direction. The molding die also includes an adjusting component extending along the length direction on the core body. The pair of pushing components are respectively driven to both ends of the adjusting component, and the adjusting component can adjust the relative distance between the pair of pushing components along the length direction. Not only can the gripping part achieve automatic insertion and forming of the bag opening fold, but the size of the mold can also be adjusted by the adjusting component, making it more versatile and improving the production efficiency of 3D bags while ensuring a high yield rate.

Claims

1. A molding die for a three-dimensional bag, used to provide shape support for the bag body during the process of forming the three-dimensional bag from sheet material, the three-dimensional bag comprising a bottom surface, two front surfaces opposite each other in the width direction of the bottom surface, and two side surfaces opposite each other in the length direction of the bottom surface; wherein, At least one of the two sides includes an insertion surface and an insertion surface, the insertion surface and the insertion surface and the insertion surface at least overlap each other at their opposite ends, and the bag opening folds on the top of the insertion surface and the insertion surface, corresponding to the overlapping portions, are inserted into each other; the forming mold of the three-dimensional bag is characterized in that the forming mold includes a mold core body and a pair of pushing components movably disposed on both sides of the mold core body in the length direction, wherein during the forming process of the three-dimensional bag, each of the pushing components pushes and supports the front, side and bottom surfaces of the corresponding side of the three-dimensional bag; In the pair of pushing components, a dragging component is provided on the pushing component corresponding to the side surface including the insertion surface. The dragging component includes a gripping part that is reciprocally movable along the height direction and is disposed on the top of the pushing component. In the process of forming the three-dimensional bag, the gripping part grips and drags the bag opening fold at the top of the insertion surface on the corresponding side to reciprocate in the height direction relative to the bag opening fold at the top of the insertion surface, and then inserts into the bag opening fold of the insertion surface. The forming mold also includes an adjusting component that extends along the length direction and is disposed on the mold core body. The pair of pushing components are respectively drivenly connected to both ends of the adjusting component, and the adjusting component can adjust the relative distance between the pair of pushing components in the length direction.

2. The molding die for the three-dimensional bag as described in claim 1, wherein, The dragging assembly includes a clamping member serving as the gripping part. The clamping member is reciprocally disposed on the top of the pushing assembly in the height direction, and its end extends out of the outer edge of the pushing assembly in a clamping manner. During the forming process of the three-dimensional bag, the end of the clamping member clamps and drags the bag opening fold on the top of the corresponding side of the insertion surface to reciprocate in the height direction, and then inserts into the bag opening fold of the insertion surface.

3. The molding die for the three-dimensional bag as described in claim 2, wherein, The dragging assembly further includes a moving cylinder for driving the clamping member to reciprocate along the height direction, and a clamping cylinder for driving the clamping member to clamp; and a clamping groove extending along the height direction is provided on a corresponding side wall of the pushing assembly, and the end of the clamping member extends out from the clamping groove.

4. The molding die for the three-dimensional bag as described in claim 1, wherein, The pushing assembly includes a movable plate that is reciprocally movable along the height direction and disposed on one side of the mold core body, facing the front side of the corresponding side of the three-dimensional bag; the dragging assembly includes a clamping member as the gripping part, the clamping member being disposed on the top of the movable plate and having its end extending outwardly from the outer edge of the pushing assembly; during the forming process of the three-dimensional bag, the movable plate reciprocates relative to the mold core body along the height direction, causing the end of the clamping member to clamp the bag opening fold at the top of the insertion surface on the corresponding side and drag the corresponding bag opening fold to reciprocate along the height direction.

5. The molding die for the three-dimensional bag as described in claim 4, wherein, A guide member is provided between the movable plate and the mold core body; when viewed along the length direction, the guide member extends along the height direction and gradually moves away from the inner wall of the movable plate from top to bottom relative to the height direction, and the movable plate is movably disposed on one side of the mold core body through the guide member.

6. The molding die for the three-dimensional bag as described in claim 5, wherein, The guide member is provided on the guide rail on the side of the mold core body, and the inner wall of the moving plate is provided with a guide member adapted to the guide rail; and in the width direction, the edge of the moving plate and the side plate of the pushing component have a clamping gap, and the end of the clamping member extends out from the clamping gap.

7. The molding die for the three-dimensional bag according to claim 6, wherein, The pushing assembly further includes a plate driving component for driving the movable plate to move along the height direction, and a plate transmission component disposed between the plate driving component and the movable plate; the plate driving component is fixedly disposed on the top of the pushing assembly, the power input end of the plate transmission component is tractively connected to the power output end of the plate driving component, and the power output end of the plate transmission component is tractively connected to the inner wall surface of the movable plate, and the plate driving component drives the movable plate to reciprocate along the height direction through the plate transmission component.

8. The molding die for the three-dimensional bag as described in claim 7, wherein, The plate drive component includes a push rod, the lower end of which is fixedly connected to the inner wall of the movable plate, and the upper end of which has a moving groove extending along the width direction. The output shaft of the plate drive component is relatively movable and disposed in the moving groove. The middle part of the push rod is provided with a slider that extends toward the mold core body and is sleeved on the guide rail. The plate drive component drives the push rod to move up and down, and links the movable plate to move back and forth along the guide rail. The output shaft of the plate drive component moves back and forth in the moving groove.

9. The molding die for the three-dimensional bag according to claim 4, wherein, The dragging assembly further includes a clamping drive component disposed on the top of the movable plate. The clamping component includes a fixed clamp and a rotating clamp. The fixed clamp is fixedly connected to the inner wall of the movable plate and has a clamping surface facing the outer side of the movable plate and aligned with the outer edge of the movable plate. The rotating clamp is rotatably disposed on the fixed clamp relative to the fixed clamp. The power output end of the clamping drive component is drivenly connected to the rotating clamp and drives the rotating clamp to rotate relative to the fixed clamp.

10. The molding die for the three-dimensional bag according to claim 9, wherein, The dragging assembly further includes a clamping transmission component disposed between the clamping drive component and the rotating jaw; the clamping transmission component is movably connected to the inner wall of the moving plate along the height direction of the moving plate, the power input end of the clamping transmission component is driven to the clamping drive component, and the power output end of the clamping transmission component is driven to the rotating jaw; the clamping drive component, through the clamping transmission component, links the rotating jaw to rotate relative to the fixed jaw.

11. The molding die for the three-dimensional bag according to claim 10, wherein, The clamping transmission component includes a rack that is slidably connected to the inner wall of the moving plate along the height direction of the moving plate. The rotating jaw has a meshing part adapted to the rack. The meshing part of the rotating jaw meshes with the rack, and the upper end of the rack is tractively connected to the power output end of the clamping drive component. The clamping drive component drives the rack to move up and down to link the rotating jaw to rotate relative to the fixed jaw.

12. A molding die for a three-dimensional bag according to any one of claims 1 to 4, wherein, The adjustment assembly includes a telescopic component extending along the length direction on the mold core body, and a telescopic adjustment component disposed on one side of the telescopic component; the two pushing components are respectively connected to the two ends of the telescopic component, and the telescopic adjustment component is driven to extend and retract relative to the mold core body along the length direction, thereby adjusting the relative distance between the pair of pushing components in the length direction.

13. The molding die for the three-dimensional bag according to claim 12, wherein, The telescopic component includes at least one threaded telescopic rod, which includes an outer cylinder and two movable shafts disposed at both ends of the outer cylinder. Each movable shaft has an external thread on one side end, which is adapted to fit the internal thread on the inner circumference of the corresponding end of the outer cylinder. Furthermore, the ends of the two movable shafts each have external threads with opposite directions of rotation. The inner circumferences of both ends of the outer cylinder each have internal threads adapted to fit the external threads of the two movable shafts. One side end of each of the two movable shafts is threaded to fit the corresponding end of the outer cylinder. The other side end of each movable shaft is fixedly connected to the side plate of the push-off assembly on the corresponding side.

14. The molding die for the three-dimensional bag according to claim 13, wherein, The telescopic component includes a plurality of threaded telescopic rods spaced apart along the height direction; and the telescopic adjustment component includes an adjustment part and an intermediate transmission member disposed between the adjustment part and the plurality of threaded telescopic rods; wherein, by adjusting the adjustment part, the intermediate transmission member is driven to synchronously adjust the plurality of threaded telescopic rods.

15. The molding die for the three-dimensional bag according to claim 14, wherein, The telescopic adjustment component includes an adjustment shaft extending perpendicular to the width direction and rotatably mounted on the mold core body. The adjustment shaft is connected to the outer cylinder of the uppermost threaded telescopic rod in the height direction. A first worm gear is formed on the outer wall surface of the adjustment shaft, and a second worm gear is formed on the outer wall surface of the outer cylinder of the uppermost threaded telescopic rod, meshing with the first worm gear. The intermediate transmission component includes meshing teeth formed on the outer wall surface of each threaded telescopic rod's outer cylinder, and a transmission chain extending along the height direction and meshing with the meshing teeth on the outer wall surface of each threaded telescopic rod's outer cylinder. One end of the adjustment shaft has a rotation drive structure extending out of the mold core body. By driving the rotation drive structure, the adjustment shaft is rotated, causing the outer cylinders of the plurality of threaded telescopic rods to rotate, so that the pair of pushing components move away from or closer to each other along the length direction.

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