Cutting and discharging device for packaging bags

Abstract

The utility model relates to the technical field of product packaging, in particular to a cutting and blanking device for a packaging bag. The packaging bag cutting device comprises a cutting mechanism and a cutting supporting plate which are installed on a base, a cutting channel allowing continuous packaging bags to pass through is arranged between the cutting mechanism and the cutting supporting plate, a guide plate and a pressing plate are arranged on the two sides of an outlet of the cutting channel respectively, and the side, close to the cutting channel, of the guide plate serves as the working side. The upper portion of the working side is of a vertical structure parallel to the bag face of the continuous packaging bag, and the lower portion of the working side is of an arc-shaped structure which is bent towards the working side and points to the conveying belt. The pressing plate can do reciprocating motion in the horizontal direction perpendicular to the cutting channel. According to the packaging bag conveying device, the falling point position of the packaging bag on the conveying belt is relatively stable, and the bag surface orientation of the packaging bag falling onto the conveying belt is always consistent, so that the position and the bag surface orientation of the packaging bag do not need to be manually adjusted, and the workload of subsequent manual operation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of product packaging, in particular to a cutting and blanking device for packaging bags. Background Art

[0002] Independent small package products are often used in the packaging of daily necessities, medicines, food and other products due to their portability and non-interference with other products.

[0003] This type of independent small package products are mostly packaged in the form of heat sealing. In actual implementation, in order to prevent the problem of heat sealing failure caused by the product being at the opening of the packaging bag during the heat sealing process, as described in the text of the Chinese patent publication number CN113581566B entitled "Sealing mechanism for independent small package baby diaper production line", the packaging bag adopts the form of top opening, so that the product is separated from the packaging bag opening under the action of gravity, so as to prevent the situation of heat sealing failure caused by the product being at the heat sealing position. When the upright packaging bag heat sealing structure is applied to a continuous heat sealing packaging machine, the continuous packaging bag a will be in the following position after the heat sealing is completed. Figure 3 The vertical position of the continuous packaging bag (a) is shown. After being conveyed to the cutting mechanism, the cutting mechanism cuts the bags into groups and drops them onto a conveyor belt, where they are transported to subsequent processes. However, since most bags fall onto the conveyor belt by free fall, not only is the placement of the bags on the conveyor belt chaotic, but it is also impossible to ensure that the bags are always facing up. Therefore, in actual operation, manual adjustment of the bag position and orientation is required to enable subsequent operations such as bag marking, code scanning, and inspection. This is an urgent problem that needs to be solved. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a cutting and blanking device for packaging bags, which not only makes the landing position of the packaging bags on the conveyor belt relatively stable, but also ensures that the bag surface orientation of the packaging bags dropped onto the conveyor belt is always consistent, thereby eliminating the need to manually adjust the position and bag surface orientation of the packaging bags, reducing the workload of subsequent manual operations.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A cutting and blanking device for packaging bags comprises a cutting mechanism and a cutting support plate installed on a base, a cutting channel for continuous packaging bags to pass through is provided between the cutting mechanism and the cutting support plate, a guide plate and a pressure plate are respectively provided on both sides of the outlet of the cutting channel, the side of the guide plate adjacent to the cutting channel is the working side, the upper part of the working side is in a plumb structure parallel to the bag surface of the continuous packaging bag, and the lower part of the working side is in an arc structure bent toward the working side and pointing to the conveyor belt; the pressure plate can reciprocate in a horizontal direction perpendicular to the cutting channel to produce a squeezing action on the cut packaging bag segment to abut against the upper part of the working side before the cut packaging bag segment falls.

[0007] As a further solution of the present invention: the lower part of the working side is a quarter-circular arc structure, and the unloading device also includes a suction cup rocker arm that can swing around the axis of the lower part of the working side, and the cantilever end of the suction cup rocker arm has a vacuum suction cup part, and a transfer gap for accommodating continuous packaging bags is provided between the motion trajectory of the vacuum suction cup part and the lower part of the working side.

[0008] As a further solution of the present invention: the suction cup rocker is provided with at least two spaced apart distributions along the axis of its rocking.

[0009] As a further solution of the present invention, the length of the suction cup rocker is adjustable.

[0010] As a further solution of the present invention: a power mechanism for driving the suction cup rocker to swing is installed on the base.

[0011] As a further solution of the present invention: the pressure plate is connected to the housing of the power mechanism through a telescopic rod, and the pressing side of the pressure plate elastically abuts against the continuous packaging bag. The output shaft of the power mechanism is fixed with a cam that drives the pressure plate to move toward the guide plate. The housing of the power mechanism is connected with a tension spring that pulls the guide plate to reset, so as to realize the reciprocating motion of the guide plate.

[0012] As a further solution of the present invention: the pressing side of the pressing plate is provided with an elastic layer to form the elastic abutment between the pressing side and the continuous packaging bag.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. Guide plates and pressure plates are installed on both sides of the exit of the cutting channel. Before the continuous packaging bag is cut by the cutting mechanism, the pressure plate is used to squeeze the cut section of the continuous packaging bag into contact with the upper part of the working side of the guide plate, so that the cut packaging bag section is stationary and its position and gravitational potential energy are constant before falling. Subsequently, the cutting mechanism cooperates with the cutting support plate to cut the continuous packaging bag. At this time, the kinetic energy converted and the sliding landing point of the falling packaging bag section after cutting will always tend to be constant as it slides along the working side, effectively preventing the packaging bag sections from falling onto the conveyor belt in a disorderly manner. In addition, the lower curved structure of the working side of the guide plate also ensures that the bag surface of the cut packaging bag section is always oriented consistently, eliminating the need for manual adjustment of the position and orientation of the packaging bag section, reducing the workload of subsequent manual operations.

[0015] 2. The present invention also features a suction cup swing arm. By combining the suction cup swing arm with the pressure plate and guide plate, the continuous bag remains in a constant position after being squeezed by the pressure plate, facilitating the stable suction of the vacuum cup portion of the suction cup swing arm. Furthermore, the working side of the guide plate supports the lower portion of the cut bag segments, preventing the vacuum cup from dropping during unloading. This suction cup swing arm-assisted unloading of the cut bag segments reduces uncertainty caused by wind energy or machine vibration during free unloading, further ensuring the accuracy of the cut bag segment location and orientation.

[0016] 3. The setting of multiple suction cup swing rods can realize multi-point adsorption of the cut packaging bag segments, ensuring the stability of the fixation between the suction cup swing rods and the cut packaging bag segments.

[0017] 4. The length of the suction cup swing arm is adjustable to adapt to continuous packaging bags of different packaging thicknesses.

[0018] 5. The pressure plate adopts a reciprocating motion structure with a cam and a tension spring, and the rotation of the cam and the rotation of the suction cup rocker share a power mechanism, which not only reduces the cost but also eliminates the need for complex program control to coordinate multiple power mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side structural schematic diagram of the utility model.

[0020] Figure 2 This is a schematic diagram of the main structure of the present utility model.

[0021] Figure 3 It is a structural schematic diagram of the continuous packaging bag in the utility model.

[0022] In the figure: 10, cutting mechanism; 20, cutting support plate; 30, base; 40, guide plate; 50, pressure plate; 51, telescopic rod; 52, tension spring; 60, suction cup rocker; 61, power mechanism; 62, cam; 70, conveyor belt; a, continuous packaging bag. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] For ease of understanding, the specific structure and working mode of the present invention are further described below with reference to the accompanying drawings:

[0025] The specific structure of the utility model refers to Figure 1-3As shown, its main structure includes a cutting mechanism 10 and a cutting support plate 20 mounted on a base 30. A cutting channel for continuous packaging bags a is provided between the cutting mechanism 10 and the cutting support plate 20. After the continuous packaging bags a are heat-sealed, they are continuously conveyed into the cutting channel. The cutting mechanism 10 and the cutting support plate 20 cooperate to achieve the cutting operation of the continuous packaging bags a. Furthermore, a guide plate 40 and a pressing plate 50 are provided on either side of the exit of the cutting channel. The side of the guide plate 40 adjacent to the cutting channel is the working side. The upper portion of the working side is vertically parallel to the surface of the continuous packaging bags a, facilitating the stable transportation of the continuous packaging bags a between the guide plate 40 and the pressing plate 50. Furthermore, the lower portion of the working side is curved toward the working side and toward the conveyor belt 70, serving to guide the bag segments after they have been cut and dropped. Furthermore, the pressing plate 50 reciprocates horizontally, perpendicular to the cutting path, squeezing the cut bag segments against the upper portion of the working side before they drop. During operation, the guide plates 40 and pressing plates 50, respectively positioned on either side of the exit of the cutting path, compress the cut segments of the continuous bag a against the upper portion of the working side of the guide plates 40 before they are cut by the cutting mechanism 10. This ensures that the cut bag segments remain stationary, with a constant position and gravitational potential energy, before they drop. Subsequently, the cutting mechanism 10 cooperates with the cutting support plate 20 to cut the continuous packaging bag a. At this time, the kinetic energy converted and the sliding landing point of the falling packaging bag segments after cutting will always tend to be constant during the sliding process along the working side, effectively preventing the packaging bag segments from falling randomly onto the conveyor belt 70. In addition, the lower curved structure of the working side of the guide plate 40 also ensures that the bag surface orientation of the cut packaging bag is always constant, thereby eliminating the need for manual adjustment of the packaging bag position and bag surface orientation, reducing the workload of subsequent manual operations.

[0026] On the basis of the above, if Figure 1 The lower portion of the working side is designed in a quarter-circular arc shape. The unloading device also includes a suction cup swing arm 60 that swings about the axis of the lower portion of the working side. The cantilevered end of the suction cup swing arm 60 features a vacuum cup, and a transfer gap is defined between the vacuum cup's motion trajectory and the lower portion of the working side to accommodate the continuous packaging bag a. The combination of the suction cup swing arm 60 with the pressure plate 50 and the guide plate 40 ensures that the continuous packaging bag a maintains its position after being squeezed by the pressure plate 50, facilitating stable suction of the vacuum cup portion of the suction cup swing arm 60. Furthermore, the working side of the guide plate 40 supports the lower portion of the bag segments during cutting and falling, preventing the vacuum cup portion from dropping during unloading. The suction cup swing arm 60 assists in unloading the cut bag segments, reducing uncertainty caused by wind energy or machine vibration during free unloading, further ensuring the accuracy of the cut bag segment's position and orientation.

[0027] Further, such as Figure 2 As shown, at least two suction cup swing rods 60 are provided along the axis of their swinging, so as to realize multi-point adsorption of the cut packaging bag segment and ensure the stability of the fixation between the suction cup swing rod 60 and the cut packaging bag segment.

[0028] In addition, the length of the suction cup rocker 60 is adjustable and can be adapted to continuous packaging bags a with different packaging thicknesses.

[0029] On the basis of the above, if Figure 1 and Figure 2 As shown, a power mechanism 61 is mounted on the base 30 to drive the suction cup swing arm 60 to swing. In actual implementation, the power mechanism 61 can be a simple stepper motor or servo motor, or other conventional methods. For example, the suction cup swing arm 60 is radially fixed to a shaft, a gear is coaxially fixed to the shaft, and a rack driven by a cylinder and meshing with the gear is provided. The reciprocating motion of the rack meshes with the gear, driving the shaft to rotate, thereby driving the suction cup swing arm 60 to swing.

[0030] In order to reduce the cost of the device, the sliding drive of the pressure plate 50 and the suction cup swing rod 60 share a power mechanism 61 in this application. Figure 1 As shown, the pressure plate 50 is connected to the housing of the power mechanism 61 via a telescopic rod 51, with the pressing side of the pressure plate 50 elastically abutting against the continuous packaging bag a. A cam 62 is fixed to the output shaft of the power mechanism 61, driving the pressure plate 50 toward the guide plate 40. A tension spring 52 is connected to the housing of the power mechanism 61, pulling the guide plate 40 back into position, thereby achieving reciprocating motion of the guide plate 40. The reciprocating structure of the cam 62 allows the power mechanism 61 to simultaneously drive the suction cup rocker 60 toward the continuous packaging bag a and simultaneously drive the guide plate 40 toward the continuous packaging bag a. Furthermore, when the power mechanism 61 drives the suction cup rocker 60 away from the continuous packaging bag a, it also simultaneously drives the guide plate 40 away from the continuous packaging bag a.

[0031] In addition, an elastic layer is provided on the pressing side of the pressing plate 50 to form an elastic abutment between the pressing side and the continuous packaging bag a, so that the pressing plate 50 will not generate excessive squeezing force when squeezing the continuous packaging bag a, so that the suction cup rocker 60 can stably drive the cut packaging bag segment to move at the moment of rotating away from the continuous packaging bag a, thereby ensuring the stability of the device operation.

[0032] Of course, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, but also encompasses the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that fall within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0033] In addition, it should be understood that although this specification describes the embodiments, not each embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The technologies, shapes, and structures not described in detail in this utility model are all well-known technologies.

Claims

1. A cutting and blanking device for packaging bags, comprising a cutting mechanism (10) and a cutting support plate (20) mounted on a base (30), wherein a cutting channel for continuous packaging bags (a) to pass therethrough is provided between the cutting mechanism (10) and the cutting support plate (20), characterized in that: A guide plate (40) and a pressing plate (50) are respectively provided on both sides of the outlet of the cutting channel, with the side of the guide plate (40) adjacent to the cutting channel being the working side, the upper part of the working side being in a plumb structure parallel to the bag surface of the continuous packaging bag (a), and the lower part of the working side being in an arc structure bent toward the working side and pointing toward the conveyor belt (70); the pressing plate (50) can reciprocate in a horizontal direction perpendicular to the cutting channel, so as to produce a squeezing action on the cut packaging bag segment to abut against the upper part of the working side before the cut packaging bag segment falls.

2. A cutting and blanking device for packaging bags according to claim 1, characterized in that: The lower portion of the working side is of a quarter-circular arc structure, and the unloading device further comprises a suction cup rocker (60) that can swing around the axis of the lower portion of the working side, the cantilever end of the suction cup rocker (60) has a vacuum suction cup portion, and a transfer gap for accommodating continuous packaging bags (a) is provided between the movement trajectory of the vacuum suction cup portion and the lower portion of the working side.

3. The cutting and blanking device for packaging bags according to claim 2, characterized in that: The suction cup swing rods (60) are arranged as at least two at intervals along the swing axis.

4. The cutting and blanking device for packaging bags according to claim 2, characterized in that: The length of the suction cup swing rod (60) is adjustable.

5. A cutting and blanking device for packaging bags according to claim 2, 3 or 4, characterized in that: A power mechanism (61) for driving the suction cup swing rod (60) to swing is installed on the base (30).

6. The cutting and blanking device for packaging bags according to claim 5, characterized in that: The pressing plate (50) is connected to the housing of the power mechanism (61) through a telescopic rod (51), and the pressing side of the pressing plate (50) elastically abuts against the continuous packaging bag (a). The output shaft of the power mechanism (61) is fixed with a cam (62) for driving the pressing plate (50) to move toward the guide plate (40). The housing of the power mechanism (61) is connected with a tension spring (52) for pulling the guide plate (40) to reset, so as to realize the reciprocating motion of the guide plate (40).

7. The cutting and blanking device for packaging bags according to claim 6, characterized in that: The pressing side of the pressing plate (50) is provided with an elastic layer to form the elastic abutment between the pressing side and the continuous packaging bag (a).

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