Middle seal staggered wrapping mouth bonding device

Abstract

The utility model relates to the field of paper bag making machines, and discloses a middle seal dislocation bag mouth bonding device which comprises a mold, an outer wrapping side inserting plate, an inner lapping side inserting plate, a fixed bag removing belt and an inner inserting bag removing belt, and the mold can move in a lifting mode to press bag body sheet materials downwards; the outer packing side inserting plates drive the outer packing side pieces of the bag body to be folded inwards; the inner lapping side inserting plate drives the inner inserting side sheet with the lapping side on the side edge to be folded inwards; the inner inserting bag removing belt makes contact with the moving face, when the inner inserting bag removing belt rotates, the moving face of the bag body is driven by friction force to move so that the inner inserting side piece can move up and down, and the inner inserting bag removing belt drives the moving face of the bag body to move so that the inner inserting side piece can be inserted into an inserting opening formed between the outer wrapping side piece and the opening folding piece from bottom to top. According to the utility model, the fixed bag-removing belt and the internally-inserted bag-removing belt generate relative movement between the internally-inserted side pieces and the externally-wrapped side pieces to realize opening wrapping, so that not only is the equipment cost saved, but also a better opening-wrapping pasting effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of paper bag making machines, in particular to a center-seal dislocated bag opening bonding device. Background Art

[0002] Center-sealed paper bags require gluing together the sides of a U-shaped bag. For bags with openings on both the fixed and movable sides, direct gluing is not possible. Instead, the inner side panels on each side must be inserted into the outer side panels and then overlapped to achieve gluing. In existing technologies, when the mold is pressed down, the fixed stripping belt has no effect on the bag surface, or is used to brake the bag during mold pressure. Center-sealed bags require a rigid pusher to push one inner side panel diagonally downward and then back into place to insert the inner side panel. This structure is complex and, due to the direct contact between the rigid pusher and the top surface of the inner side panel, it can easily damage the bag. Furthermore, after the bag is formed, the bag's plane is parallel to the mold, with the four side edges of the bag resting on the outside of the mold. The mold's sides are equipped with corresponding grooves for the bag's sides to poke inward. During stripping, the bag requires a tool to poke the bag's sides inward, deforming the bag before it can be removed from the top. In order to solve the problems of high cost and low efficiency caused by complex insertion structure and operation of paper bag sealing in the prior art, as well as the problem that the bag body is easily damaged during the insertion and demoulding process, a center-seal staggered bag opening bonding device is needed. Utility Model Content

[0003] The utility model aims at the shortcomings of the prior art and provides a center-seal dislocated bag opening bonding device.

[0004] To solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] The center-sealed offset bag opening bonding device includes a mold, an outer side insert, an inner side insert, a fixed bag stripping belt, and an inner bag stripping belt. The mold can move up and down to press the bag body sheet downward; the outer side insert drives the outer side sheet of the bag body to fold inward through movement in the y-axis direction or arc movement; the inner side insert drives the inner side sheet with overlapping sides to fold inward through movement in the y-axis direction or arc movement; the fixed bag stripping belt contacts the fixed surface, and the opposite side of the fixed surface of the bag body is the moving surface. The outer side sheets are connected to both sides of the fixed surface, and the inner side sheets are connected to both sides of the moving surface in the x-axis direction; the folding tongue insert folds the folding tongue sheet of the bag body upward by touching it;

[0006] The inner insertion and stripping belt is in contact with the moving surface. When the inner insertion and stripping belt rotates, the moving surface of the bag body is driven by friction to move, so that the inner insertion side pieces connected on both sides of the moving surface move up and down. The inner insertion and stripping belt has a first stroke of forward rotation, so that the height of the top edge of the inner insertion side piece is lower than the bottom edge of the folding piece at the top of the outer side piece; when the inner insertion and stripping belt is in the first stroke or the second stroke, the outer side inserting plate remains outside the outer side piece, and the inner surface of the outer side inserting plate is in contact with the folding piece and maintains a state of having an insert between the outer side piece and the folding piece; sufficient space is provided for the inner insertion side piece to be inserted into the inserting hole, ensuring a smooth insertion process.

[0007] After the first stroke, the inner insertion and stripping belt has a second upward stroke, driving the moving surface of the bag body to move, allowing the inner inserting side panel to be inserted from bottom to top into the slot formed between the outer side panel and the folding flap. The flexible belt drive replaces the rigid push block, significantly reducing the damage rate. Furthermore, the action can be completed using the necessary structure for demoulding. Only slight differences in the position of the outer and inner side inserts and an additional stroke of the belt are required to complete the action. This significantly reduces the cost of installing an additional slotting device, improves slotting efficiency, and reduces the risk of bag damage.

[0008] Preferably, before the inner side panel is inserted into the insertion opening, the outer side panel and the inner side panel are kept outside the outer side panel and the inner side panel. This arrangement prevents the outer side panel and the inner side panel from bouncing outward, avoids obstruction caused by the inner side panel during downward and upward insertion, and avoids collision between the inner side panel of the bag body and the inner side panel or the folding panel, thus ensuring smooth insertion.

[0009] Preferably, the contact area between the outer side insert and the outer side sheet is smaller than the area of the outer side sheet. The outer side insert and the outer side sheet are not completely covered, providing space for the folded piece outside the outer side sheet to bend outward, so that the insertion opening is large enough to insert the inner side sheet on the other side.

[0010] Preferably, the inner side insert plate is in contact with the inner side sheet while the overlapped edge is not in contact with the mold, so as to avoid excessive pressure of the inner side sheet against the mold, which may cause the inner side sheet to collide with the outer side sheet during downward or upward movement.

[0011] Preferably, the friction between the moving surface and the inner insertion and stripping belt is greater than the friction between the inner surface of the moving surface and the mold, ensuring that the inner insertion and stripping belt can effectively drive the moving surface and the inner insertion side piece to move downward or insert the inner insertion side piece into the socket.

[0012] Preferably, the friction between the fixed surface and the fixed bag stripping belt is greater than the friction between the inner surface of the fixed surface and the mold, ensuring that the fixed bag stripping belt can drive the fixed surface to move, thereby driving the inner side panel to move, while achieving pre-deformation of the bag body to facilitate subsequent demolding.

[0013] Preferably, a plywood is provided on the side of the mold, which can move closer to or away from the mold along the y-axis, thereby facilitating adhesion of the seal in the bag and improving the molding quality of the bag.

[0014] Preferably, the plywood, after applying pressure to the middle seal of the paper bag near the mold, retreats away from the mold. The internally inserted stripping belt then rotates in a forward third stroke, synchronously rotating with the fixed stripping belt to pull the bonded bag downward and out of the mold. This design utilizes the same set of components to pull the bonded bag downward and out of the mold. This design enables automatic demolding of the bag, eliminating the need for additional poke tools, simplifying the demolding process and improving production efficiency.

[0015] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0016] The utility model can eliminate the need for poking the bag when the bag is removed from the mold. After the traditional bag is formed, because the shape of the upright bag and the mold is almost the same, it is necessary to poke the bag inward to deform the bag, and then use the fixed bag stripping belt to remove the formed bag from the mold from top to bottom. However, because the fixed bag stripping belt has already driven the fixed surface to move during the process of inserting the inner side piece into the socket, it plays a role in pre-deforming the bag and pre-adjusting the bag's posture. The state between the bag and the mold is not completely parallel. In the subsequent demolding process, even without the additional poke bag, demolding can be easily completed.

[0017] Since the fixed surface is in contact with the fixed bag-taking belt, the fixed bag-taking belt does not directly contact the inner side piece, so it can drive the inner side piece, and the vertical movement of the fixed bag-taking belt can be converted into a slightly tilted movement of the inner side piece. Moreover, since there is a flexible contact between the fixed bag-taking belt and the fixed surface of the bag body, the inner side piece is also driven to move due to the existence of friction when it moves, and generally there will be no collision with the outer side piece before it is inserted into the socket. Even if there is a collision, the belt friction transmission is used instead of the mechanical push block, and the flexible contact will not generate a force that damages or even destroys the bag body.

[0018] By utilizing the components that originally worked only in the bagging step, during the bagging process, the fixed bagging belt and the inner bagging belt are made to move relative to each other in asynchronous manner, resulting in relative movement between the inner side panel and the outer side panel, thereby realizing the bagging. This not only saves equipment costs but also achieves a better bagging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the staggered bag opening bonding device on one side of the utility model before the outer bag side inserting plate and the inner bag side inserting plate are folded;

[0020] Figure 2 yes Figure 1 A partial enlarged view of middle A;

[0021] Figure 3 yes Figure 1 Structural diagram from another angle;

[0022] Figure 4 yes Figure 3 A partial enlarged view of middle B;

[0023] Figure 5 This is a structural diagram of the utility model after the inner insertion and bag stripping belt on one side completes the first stroke during the upper and lower misaligned bagging process;

[0024] Figure 6 yes Figure 5 Structural diagram from another angle;

[0025] Figure 7 yes Figure 6 A partial enlarged view of center C;

[0026] Figure 8 It is a structural schematic diagram of one side of the utility model after the bag opening is completed but before the bag is taken off.

[0027] The names of the parts indicated by the numerical labels in the above drawings are as follows: 61, mold; 62, outer side insert; 63, inner side insert; 64, fixed bag removal belt; 65, inner bag removal belt; 66, plywood; 67, folding tongue insert; 90, bag body sheet; 91, outer side sheet; 92, inner side sheet; 93, fixed surface; 94, movable surface; 95, socket; 96, folding mouth sheet; 97, folding tongue sheet. DETAILED DESCRIPTION

[0028] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] Middle seal dislocation bag mouth bonding device, such as Figure 1-4As shown, it includes a mold 61, an outer side insert plate 62, an inner side insert plate 63, a fixed bag-removing belt 64 and an inner bag-removing belt 65. The mold 61 can move up and down to press the bag sheet 90 downward; the outer side insert plate 62 drives the outer side piece 91 of the bag to fold inward through movement in the y-axis direction or arc movement; the inner side insert plate 63 drives the inner side piece 92 with a overlap 921 on the side to fold inward through movement in the y-axis direction or arc movement; the folding tongue insert plate 67 folds the folding tongue piece 97 of the bag upward by touching; the touching can be that the mold 61 presses down to drive the folding tongue piece to hit the folding tongue insert plate 67 to make the folding tongue piece 97 of the bag fold upward, or the folding tongue insert plate 67 is inserted to make the folding tongue piece 97 of the bag fold upward. The fixed bag-removing belt 64 is in contact with the fixed surface 93, and the opposite side of the fixed surface 93 of the bag body is the movable surface 94. The outer side pieces 91 are connected to the two sides of the fixed surface 93 in the x-axis direction, and the inner side pieces 92 are connected to the two sides of the movable surface 94 in the x-axis direction; among them, the movement in the y-axis direction is that the inner side insert plate 63 or the outer side insert plate 62 moves horizontally in a direction parallel to its surface so that the side pieces of the paper bag are folded inward, and the arc movement is that the inner side insert plate 63 or the outer side insert plate 62 makes the side pieces of the paper bag close and fold inward in a hinge-like manner.

[0031] The inner insertion and bag stripping belt 65 contacts the moving surface 94. When the inner insertion and bag stripping belt 65 rotates, the moving surface 94 of the bag body is driven to move by the friction force, so that the inner side pieces 92 connected on both sides of the moving surface 94 move up and down. The inner insertion and bag stripping belt 65 has a first stroke of forward rotation, so that the height of the top edge of the inner side piece 92 is lower than the bottom edge of the folding piece 96 at the top of the outer side piece 91; the inner insertion and bag stripping belt 65 has a second stroke of upward movement after the end of the first stroke, driving the moving surface 94 of the bag body to move so that the inner side piece 92 is inserted from bottom to top into the socket 95 formed between the outer side piece 91 and the folding piece 96.

[0032] The bag body main body sheet material is the sheet material on the front side and the back side of the bag body, the outer surface of the bag body main body sheet material on one side is the fixing surface 93, and the outer surface of the bag body main body sheet material on the other side is 94.

[0033] Before the inner inserting side piece 92 is inserted into the insertion opening 95, the outer side inserting plate 62 and the inner side inserting plate 63 remain outside the outer side piece 91 and the inner inserting side piece 92. During the first or second stroke of the inner inserting and stripping belt, the outer side inserting plate 62 remains outside the outer side piece 91, and the inner surface of the outer side inserting plate 62 contacts the folding piece 96, maintaining the state of the insertion opening 95 between the outer side piece 91 and the folding piece 96.

[0034] The friction between the moving surface 94 and the inner stripping belt 65 is greater than the friction between the inner surface of the moving surface 94 and the mold 61. The friction between the fixed surface 93 and the fixed stripping belt 64 is greater than the friction between the inner surface of the fixed surface 93 and the mold 61.

[0035] like Figure 5-8 As shown, a plywood 66 is provided on the side of the mold 61. The plywood 66 can move along the y-axis toward or away from the mold 61. After the plywood 66 approaches the mold 61 and applies pressure to the seal of the paper bag, it retreats away from the mold 61. The inserted bag stripping belt 65 then rotates in the third stroke in the forward direction. The fixed bag stripping belt 64 rotates synchronously, driving the bonded bag body downward and away from the mold 61.

[0036] As one embodiment, the contact surface area between the outer side insert 62 and the outer side sheet 91 is smaller than the area of the outer side sheet 91. When the inner side insert 63 contacts the inner side sheet 92, the overlap 921 is kept away from the mold 61.

[0037] The distance between the outer side insert 62 and the outer side piece 91, as well as the contact area between the outer side pieces 91, partially determine the size of the socket opening. Therefore, it is necessary to properly adjust the forward and backward and left and right travel of the outer side insert 62, in conjunction with the insertion position of the inner side insert 63 and the distance between the inner side insert 63 and the mold, so that the inner side piece 92 can smoothly move down and then rise, allowing it to be smoothly inserted into the socket.

[0038] Specific working steps:

[0039] 1. Bag sheet placement: Place the bag sheet 90 below the mold 61 . The bag sheet 90 includes an outer side sheet 91 , an inner side sheet 92 , a fixed surface 93 and a movable surface 94 .

[0040] 2. Mold pressing down: The mold 61 descends, pressing the bag sheet 90 downward to preliminarily shape the bag into a U shape.

[0041] 3. Side panel folding: After the folding tongue insert 67 and the folding tongue piece 97 generate relative movement to fold the folding tongue piece 97 upward, the inner side insert 63 and the outer side insert 62 respectively drive the outer side piece 91 and the inner side insert 92 to fold inward through the movement in the y-axis direction. Before the outer side insert 62 and the inner side insert 63 complete folding, the folding tongue insert 67 moves downward and retreats.

[0042] 4. Inserting the inner side piece into the socket: The inner inserting and stripping belt 65 first rotates forward in the first stroke, so that the height of the top edge of the inner side piece 92 is lower than the bottom edge of the folding piece 96 at the top of the outer side piece 91; then the inner inserting and stripping belt 65 moves upward in the second stroke, driving the moving surface 94 of the bag body to move so that the inner side piece 92 is inserted from bottom to top into the socket 95 formed between the outer side piece 91 and the folding piece 96. During this process, the fixed stripping belt 64 rotates synchronously, driving the fixed surface 93 to move, thereby achieving pre-deformation of the bag body.

[0043] 5. Pressurizing the middle seal: The plywood 66 moves along the y-axis direction close to the mold 61, applying pressure to the middle seal of the paper bag to make the middle seal bonded.

[0044] 6. Demoulding: The plywood 66 moves away from the mould 61 , the inserted bag stripping belt 65 has a third stroke of forward rotation, and the fixed bag stripping belt 64 rotates synchronously, driving the bonded bag body downward to separate from the mould 61 .

[0045] The mold, outer side insert, inner side insert, folding tongue insert, and plywood 66 of the utility model can all be cylinders, motors, or cylinders and motors that utilize the coordination of gear racks, screw nuts, and slider guides to achieve motion. The rotation of the inner bag-stripping belt 65 and the fixed bag-stripping belt 64 can be driven by a motor to drive the synchronous wheel to rotate, thereby driving the belt sleeved on the synchronous wheel to rotate. The driving device is a conventional setting for those skilled in the art. The above only provides one embodiment, and other methods will not be elaborated on here. In summary, this patent solves the problems existing in the prior art through ingenious structural design and reasonable action coordination, improves the production quality and efficiency of the bag body, and has significant beneficial effects.

[0046] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or location relationships based on the positions or location relationships shown in the accompanying drawings. The x-axis direction is the extension direction of the fold line of the flap of the bag body sheet, and the y-axis direction is the direction of the line connecting the bag openings on both sides of the bag body sheet. The y-axis direction is perpendicular to the x-axis direction, and both the x-axis and y-axis directions are located in the horizontal plane. It should be noted that Figure 1 、 3 , 5, 6, 8, in order to show the state of the bag body, only the processing parts on one side are drawn, and the parts on the other side are not drawn, but this does not mean that there are no processing parts on the other side. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0047] In short, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention patent.

Claims

1. The device for gluing the middle seal and dislocation bag mouth is characterized by: include - a mold (61) capable of lifting and lowering to press the bag sheet (90) downward; - a fixed bag-removing belt (64) in contact with the fixed surface (93); the opposite side of the fixed surface (93) of the bag body is the movable surface (94); the fixed surface (93) is connected to the outer side pieces (91) on both sides in the x-axis direction; and the movable surface (94) is connected to the inner side pieces (92) on both sides in the x-axis direction; - an inner side insert plate (63) that drives the inner side insert plate (92) with the overlapping edge (921) to fold inwards through movement in the y-axis direction or arc movement; - an outer side insert plate (62) that drives the outer side piece (91) of the bag body to fold inwards through movement in the y-axis direction or arc movement; - a folding tongue insert (67) that folds the folding tongue piece (97) of the bag body upwards by touching it; - an inner insertion and stripping belt (65), the inner insertion and stripping belt (65) contacts the moving surface (94), and when the inner insertion and stripping belt (65) rotates, the moving surface (94) of the bag body is driven by friction to move, thereby moving the inner insertion side piece (92) up and down, and the inner insertion and stripping belt (65) has a first stroke of forward rotation, so that the height of the top edge of the inner insertion side piece (92) is lower than the bottom edge of the folding piece (96) at the top of the outer side piece (91); the inner insertion and stripping belt (65) is in the first stroke. After the stroke is completed, the second stroke of upward movement is performed, which drives the moving surface (94) of the bag body to move so that the inner inserting side piece (92) is inserted from bottom to top into the insertion opening (95) formed between the outer side piece (91) and the folding piece (96); when the inner inserting and removing bag belt (65) is in the first stroke or the second stroke, the inner surface of the outer side inserting plate (62) contacts the folding piece (96) and maintains the state of having the insertion opening (95) between the outer side piece (91) and the folding piece (96).

2. The device for gluing the middle seal and the offset bag opening according to claim 1, characterized in that: Before the inner side piece (92) is inserted into the socket (95), the outer side insert plate (62) and the inner side insert plate (63) are kept outside the outer side piece (91) and the inner side piece (92).

3. The device for gluing the middle seal and the offset bag opening according to claim 1, characterized in that: The contact surface area between the outer side insert plate (62) and the outer side piece (91) is smaller than the area of the outer side piece (91).

4. The device for gluing the middle seal and the offset bag opening according to claim 1, characterized in that: When the inner side insert plate (63) contacts the inner side piece (92), the overlap edge (921) is kept out of contact with the mold (61).

5. The device for bonding the middle seal and the bag opening according to claim 1, characterized in that Middle-sealed dislocated bag opening bonding device: the friction force between the moving surface (94) and the inner insertion and bag-removing belt (65) is greater than the friction force between the inner surface of the moving surface (94) and the mold (61).

6. The device for bonding the middle seal and the dislocated bag opening according to claim 1 is characterized in that Sealing dislocation bag opening bonding device: the friction force between the fixed surface (93) and the fixed bag stripping belt (64) is greater than the friction force between the inner surface of the fixed surface (93) and the mold (61).

7. The device for bonding the middle seal and the dislocated bag opening according to claim 1 is characterized in that Sealing dislocation bag opening bonding device: A plywood (66) is provided on the side of the mold (61), and the plywood (66) can move along the y-axis direction to approach or move away from the mold (61).

8. The device for bonding the middle seal staggered opening according to claim 7 is characterized in that Sealing dislocation bag opening bonding device: the plywood (66) applies pressure to the sealing portion of the paper bag near the mold (61) and then retreats in the direction away from the mold (61), and then the inserted bag stripping belt (65) has a third stroke of forward rotation, and the fixed bag stripping belt (64) rotates synchronously, driving the bonded bag body downward to separate from the mold (61).

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