Waste removing mechanism of flexible bag body forming machine

Abstract

The utility model relates to the field of bag body forming equipment, in particular to a waste removing mechanism of a flexible bag body forming machine, which comprises a sheet material conveying path output by a material roll. A front-back waste rejecting device and a left-right waste rejecting device are sequentially arranged on the sheet conveying path; the front and back waste removing devices comprise longitudinal cutters and longitudinal cutter pads which correspond in position and can relatively lift, and the longitudinal cutters are located on the two sides perpendicular to the sheet material conveying direction; the left waste removing device and the right waste removing device comprise a transverse cutting knife and a transverse knife pad which correspond to each other in position and can be lifted relatively, and the sheet material cutting device comprises a cutting knife used for cutting continuously conveyed sheet materials into single sheet materials; a compact mechanism is formed by functional structures of front-back waste removing, left-right waste removing, cutting, material pressing, waste discharging and the like, waste materials at the four corners can be accurately removed in a transverse-longitudinal waste removing mode when bag bodies are produced through an assembly line, the relative movement cutting mode is suitable for continuous feeding non-stop operation, and the production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bag body forming equipment, especially to the reject mechanism of flexible bag body forming machine. BACKGROUND

[0002] In the packaging industry, the bag body of flexible material, especially the woven bag, is widely used in the fields of grain, chemical industry, building material and the like due to its high strength, low cost, reusability and the like. The traditional bag body is mostly rectangular flat bag or simply sewed bag, and has problems of unstable filling, difficult stacking, poor compression resistance and the like. In recent years, with the development of logistics and warehousing automation, the market demand for the bag body with stable bottom surface, strong self-standing performance and foldable storage, such as the "boat-shaped" or "hexahedral" structure, is increasing, and the bag body in this form can be connected with the upper cover with zipper or other upper cover opened and closed in the upper part, thereby playing a carrying function, and is especially applied more in the fields of clothing, bedding packaging and storage.

[0003] In the prior art, the forming process of the bag body usually includes the processes of unwinding, slitting and edge sealing, and each link is dispersedly arranged, and especially the last edge sewing of the woven bag relies on manual operation to sew the connecting part of the bag body, and it is difficult to guarantee the precision and consistency.

[0004] Before being folded and formed, the "boat-shaped" or "hexahedral" structure bag body needs to accurately cut the excess waste material existing in the four corners of each piece of material, but the flexible material lacks effective pressing and positioning structure, and under high-speed operation, the piece of material is easy to deviate and cut deviation; if the die cutting mode is adopted, it cannot adapt to different specifications of the bag body, resulting in increased production cost. In addition, if the edge and corner waste material generated in the piece of material processing process cannot be timely removed, it is easy to cause equipment jamming, and cannot adapt to the demand of high-speed continuous production line.

[0005] Therefore, a compact, coordinated, efficient and stable reject mechanism of the flexible bag body forming machine is needed, which can complete the cutting of the waste material in the four corners and effectively realize the separation of the waste material, and improve the automation level and production efficiency of the whole machine. UTILITY MODEL CONTENTS

[0006] The utility model provides the reject mechanism of flexible bag body forming machine in view of the shortcoming in the prior art.

[0007] The utility model solves the above technical problem through the following technical scheme:

[0008] The flexible bag forming machine includes a sheet material conveying path output from a material roll; front and rear waste removal devices and left and right waste removal devices are sequentially arranged on the sheet material conveying path; the front and rear waste removal devices include longitudinal cutters and longitudinal blade pads that are positioned correspondingly and can be raised and lowered relative to each other, the longitudinal cutters are located on both sides perpendicular to the sheet material conveying direction, and are used to longitudinally cut off the waste material on both sides of the sheet material; the left and right waste removal devices include transverse cutters and transverse blade pads that are positioned correspondingly and can be raised and lowered relative to each other, the transverse cutters are located on both sides perpendicular to the sheet material conveying direction, and are used to transversely cut off the waste material on both sides of the sheet material, so that the sheet material is in a cross shape.

[0009] It also includes a sheet cutting device, which is integrated on the left and right scrap removal devices or located downstream of the left and right scrap removal devices. The sheet cutting device includes a cutter for cutting the continuously conveyed sheet into single sheets, a transverse cutter, a cutter that shares some of the cutting tools, or a cutter that has a separate cutting tool and is located downstream of the left and right scrap removal devices.

[0010] The flexible bag forming machine also includes a waste removal device, which is integrated into the left and right waste removal devices or located downstream of the left and right waste removal devices. The waste removal device includes a drive component for removing waste material from the sheet material conveying path.

[0011] Preferably, a pressure plate is also included, which can move relative to the transverse blade pad to press the sheet material onto the transverse blade pad during left and right scrap removal. The pressure plate has a groove for the transverse cutting blade to pass through. The pressure plate presses the sheet material firmly during cutting to prevent shaking or deviation and ensure a clean cut edge. The groove design allows the cutting blade to pass through the pressure plate without obstruction.

[0012] Preferably, a conveyor belt is provided on the outer side or above the transverse blade pad, and the conveyor belt is provided with suction holes connected to a negative pressure source. Negative pressure adsorption enhances the positioning stability of the sheet material at critical work stations, especially on thin and flexible materials, where the cut sheet material is sucked up by the conveyor belt and transported forward.

[0013] Preferably, the conveyor belt and the transverse cutter pad are connected to a lateral force source. When the transverse cutter cuts the sheet material, the transverse cutter pad is located below the sheet material and the transverse cutter does not contact the conveyor belt. When the sheet material is conveyed forward, the conveyor belt is located below the sheet material. During the conveying stage, the conveyor belt holds the bag, especially the remaining part after the waste material has been cut off, to prevent it from lifting and affecting subsequent processing. When the transverse cutter cuts, the conveyor belt moves laterally to prevent the cutter from contacting the conveyor belt and damaging it.

[0014] Preferably, the waste removal device includes a waste collection chamber below the sheet material conveying path, and a drive component is installed above the waste collection chamber to act on the waste and guide it towards the waste collection chamber. Active waste removal is achieved using the drive component, which can remove waste by blowing, pushing, or sucking air, or a combination of these methods. This active waste removal is more reliable than passive dropping, preventing waste from remaining adhered or stuck in its original position after cutting by the cutter.

[0015] Preferably, the driving component includes an air blowing head located above the sheet conveying path and / or a pusher head located above the sheet conveying path that can move up and down.

[0016] Preferably, the waste removal device is integrated into the left and right waste removal devices, and there is a channel between the transverse blade pads on the front and rear sides of the conveying direction for the waste to pass downward. The waste collection chamber is located below the channel when the transverse cutter cuts the sheet material.

[0017] Preferably, the longitudinal cutter moves relative to the continuously conveyed sheet material along the conveying direction, while the transverse cutter moves relative to the continuously conveyed sheet material to cut the waste laterally. This relative motion design allows the longitudinal cutter to cut the conveyed sheet material without stopping the machine, or it allows the sheet material to be cut by the cutter while the machine is stopped.

[0018] Preferably, the sheet material is conveyed longitudinally, and the transverse cutter can reciprocate perpendicular to the conveying direction to cut the waste material laterally.

[0019] Preferably, the left and right waste removal device includes a crossbeam, on which a horizontally extending guide rail is provided, and a slider is slidably disposed on the guide rail, with a horizontal cutter connected to the slider.

[0020] Preferably, the slider on the guide rail is equipped with transverse cutters at both the front and rear, which cut the waste material laterally along its front and rear edges. This design facilitates electric or pneumatic drive, easy integration into a PLC control system, and ensures precise guidance, achieving symmetrical waste removal from both sides.

[0021] This utility model, by adopting the above technical solution, has significant technical effects:

[0022] The compact structure integrates functions such as front and rear waste removal, left and right waste removal, cutting, pressing, and waste removal. It is used in the production of bags on the assembly line, which facilitates the subsequent folding and processing of the cut individual bag sheets. The horizontal and vertical waste removal methods can accurately remove waste from the four corners. The relative motion cutting method is suitable for continuous material feeding without stopping the machine, which greatly improves production efficiency. The use of drive components to separate waste contributes to the cleanliness of the production environment. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a structural diagram showing the connection between the front and rear waste removal devices, the left and right waste removal devices, and the sheet material cutting device.

[0025] Figure 3 yes Figure 2 Another structural diagram from another angle;

[0026] Figure 4 This is a schematic diagram of the left and right waste removal device;

[0027] Figure 5 yes Figure 4 A structural diagram from another angle.

[0028] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Front and rear waste removal device; 11. Longitudinal cutter; 12. Longitudinal cutter pad; 2. Left and right waste removal device; 21. Transverse cutter; 22. Transverse cutter pad; 23. Conveyor belt; 24. Negative pressure source; 25. Channel; 26. Crossbeam; 27. Guide rail; 28. Slider; 29. ​​Pressure plate; 291. Cutting groove; 3. Sheet material cutting device; 31. Cutting blade; 41. Drive component; 61. Waste collection chamber. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] Flexible bag forming machine, such as Figures 1-2 As shown, the device includes a sheet material conveying path output from a roll of material; front and rear waste removal devices 1 and left and right waste removal devices 2 are sequentially arranged on the sheet material conveying path; the front and rear waste removal devices 1 include longitudinal cutters 11 and longitudinal blade pads 12 that are positioned correspondingly and can be raised and lowered relative to each other. The longitudinal cutters 11 are located on both sides perpendicular to the sheet material conveying direction and are used to longitudinally cut off the waste material on both sides of the sheet material; the left and right waste removal devices 2 include transverse cutters 21 and transverse blade pads 22 that are positioned correspondingly and can be raised and lowered relative to each other. The transverse cutters 21 are located on both sides perpendicular to the sheet material conveying direction and are used to transversely cut off the waste material on both sides of the sheet material, so that the sheet material is in a cross shape.

[0032] like Figures 2-3 As shown, the flexible bag forming machine also includes a sheet cutting device 3. The sheet cutting device 3 is integrated on the left and right waste removal devices 2 or the sheet cutting device is located downstream of the left and right waste removal devices 2. The sheet cutting device 3 includes a cutter 31 for cutting the continuously conveyed sheet into single sheets. The transverse cutter 21 and the cutter 31 share some of the cutting tools or the cutter 31 has a separate cutting tool and is located downstream of the left and right waste removal devices 2.

[0033] like Figures 4-5As shown, the flexible bag forming machine also includes a waste removal device, which is integrated into the left and right waste removal devices 2 or located downstream of the left and right waste removal devices 2. The waste removal device includes a drive component 41 for removing waste material from the sheet material conveying path.

[0034] In this design, the longitudinal cutter 11 and longitudinal blade pad 12, and the transverse cutter 21 and transverse blade pad 22, which can be raised and lowered relative to each other, are typically connected to the power source for raising and lowering the transverse cutter 21 and the longitudinal cutter 11. However, the power source can also be the longitudinal blade pad 12 and the transverse blade pad 22 connected to the power source for raising and lowering. The power source can be a cylinder mounted on the cutter, or a cylinder or motor connected to the mounting base where the longitudinal cutter 11 and the transverse cutter 21 are located. It can be used in conjunction with a servo drive system to achieve precise setting of the raising and lowering timing of the longitudinal cutter 11 and the transverse cutter. In one embodiment, the longitudinal cutter 11 and the transverse cutter 21 can be rotating circular cutters, but the conveying direction must be in the same direction as the line to be cut. In another embodiment, the longitudinal cutter 11 moves relative to the continuously conveyed sheet material along the conveying direction, and the transverse cutter 21 moves relative to the continuously conveyed sheet material to transversely cut the waste material.

[0035] One implementation direction of the relative movement between the transverse cutter 21 and the continuously conveyed sheet material is as follows: the sheet material is conveyed longitudinally, and the transverse cutter 21 can reciprocate perpendicular to the conveying direction to cut the waste material laterally. The left and right waste removal device 2 includes a crossbeam 26, on which a transversely extending guide rail 27 is provided. A slider 28 is slidably mounted on the guide rail 27, and the transverse cutter 21 is connected to the slider 28. Transverse cutters 21 are installed at the front and rear of the slider 28 on the guide rail 27, and the front and rear transverse cutters 21 cut the front and rear edges of the waste material laterally.

[0036] It also includes a pressure plate 29, which can move relative to the transverse blade pad 22 to press the sheet material onto the transverse blade pad 22 when scrapping from the left and right. The pressure plate 29 has a blade groove 291 through which the transverse cutting blade 21 passes.

[0037] A conveyor belt 23 is provided on the outside or above the transverse blade pad 22. The conveyor belt 23 is provided with a suction hole connected to a negative pressure source 24. The conveyor belt 23 and the transverse blade pad 22 are connected to a transverse motion power source. When the transverse cutter 21 cuts the sheet material, the transverse blade pad 22 is located below the sheet material and the transverse cutter 21 does not contact the conveyor belt 23. When the sheet material is conveyed forward, the conveyor belt 23 is located below the sheet material.

[0038] The waste removal device includes a waste collection chamber 61 below the sheet material conveying path, and a drive member 41 is provided above the waste collection chamber 61 to act on the waste and provide the waste to move toward the waste collection chamber 61.

[0039] The drive unit 41 includes an air blowing head located above the sheet conveying path and / or a pusher head located above the sheet conveying path that can move up and down.

[0040] The waste removal device is integrated on the left and right waste removal devices 2. There is a channel 25 between the transverse blade pads 22 on the front and rear sides of the conveying direction for waste to pass downward. The waste collection chamber 61 is located below the channel 25 when the transverse cutter 21 cuts the sheet material.

[0041] It also includes an output conveyor belt 81, which is located downstream of the flanging welding device 5. There is a bag pulling mechanism that can reciprocate horizontally between the output conveyor belt 81 and the flanging welding device 5.

[0042] Working principle:

[0043] A. The sheet material is guided from the roll by guide rollers into the sheet material conveying path, where a correction device can be installed to correct the conveying of the sheet material.

[0044] B. The sheet material is continuously conveyed longitudinally, entering the front and rear scrap removal device 1 at the beginning of the conveying path. The longitudinal cutters 11 on both sides of the front and rear scrap removal device 1, in conjunction with the lower longitudinal cutter pad 12, rise and fall relative to the longitudinal cutter pad 12, acting on the surface of the sheet material to cut the waste on both sides of the sheet material along the front-to-back direction. The longitudinal cutter pad 12 can be a single plate or a separate plate; if it is the longitudinal cutter 11, the longitudinal cutter pad 12 can also be a roller. Since the waste between the sheet material of the previous bag and the sheet material of the next bag is connected, the waste can be cut together, so each sheet material only needs to be cut once on average on both sides. The longitudinal cutter 11 can be a disc cutter that cuts the sheet material by rotation, or a cutter fixed in the front-to-back direction that cuts by the movement of the sheet material, or a cutter that can move back and forth, cutting the waste along the front-to-back direction through relative displacement with the sheet material. The waste material is left in place for subsequent processing.

[0045] C. The sheet material continues to be conveyed longitudinally. At the front end of the conveying path, it first enters the left and right scrap removal device 2. Before the transverse cutter 21 descends to cut, the pressure plate 29 presses down, pressing the sheet material onto the upper surface of the transverse blade pad 22. Before the cutting is completed, the conveyor belt 23 and the transverse blade pad 22 move laterally, allowing the conveyor belt 23 to avoid the transverse cutter 21. The transverse blade pad 22 is located below the transverse cutter 21, and it works in conjunction with the transverse cutter 21 to laterally cut the waste material at the four corners of the sheet material. The transverse cutter 21 passes through the blade groove 291 of the pressure plate 29 and acts on the surface of the sheet material. The transverse cutter 21 is a cutter mounted on the guide rail 27. The transverse cutter 21 moves laterally relative to the sheet material, thereby cutting off the waste material.

[0046] D. The sheet material enters the waste removal device, which can be located above or downstream of the left and right waste removal devices 2. The cut waste material is moved downward by a drive component, which can be one or more of the following: an air blowing head above the sheet material, a pusher head that can move up and down above the sheet material conveying path, or a suction head located below the sheet material conveying path. After the waste removal device removes the waste, the conveyor belt 23 sucks up the sheet material, especially the part of the side sheet material that has been removed of waste. The conveyor belt and the conveyor roller together drive the continuous sheet material forward, keeping the sheet material in a flat and even state.

[0047] E. The continuously conveyed sheet material is cut into single sheets by the sheet material cutting device 3. The sheet material cutting device 3 includes a cutter 31. If the sheet material cutting device 3 is integrated into the left and right scrap removal device 2, the cutter 31 can be moved left and right by part of the transverse cutter 21. If the sheet material cutting device 3 is located downstream of the left and right scrap removal device 2, the left and right scrap removal device 2 is equipped with a separate cutter, and the sheet material is cut by means of vertical pressure cutting, cutting on a guide rail, or ultrasonic cutting. After completing the action, each actuator returns to the initial position in sequence, waiting for the next cycle action to be triggered.

[0048] In the description of this utility model, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A waste rejection mechanism for a flexible bag forming machine, characterized in that, include The conveying path for sheet material output from the roll; The sheet material conveying path is equipped with front and rear waste removal devices (1) and left and right waste removal devices (2) in sequence. The front and rear waste removal device (1) includes a longitudinal cutter (11) and a longitudinal cutter pad (12) that are positioned correspondingly and can be raised and lowered relative to each other. The longitudinal cutter (11) is located on both sides perpendicular to the sheet material conveying direction and is used to longitudinally cut off the waste material on both sides of the sheet material. The left and right waste removal device (2) includes a transverse cutter (21) and a transverse cutter pad (22) that are positioned and can be raised and lowered relative to each other. The transverse cutter (21) is located on both sides perpendicular to the sheet material conveying direction and is used to cut the waste material on both sides of the sheet material laterally so that the sheet material is in a cross shape. It also includes a sheet cutting device (3), which is integrated on the left and right scrap removal device (2) or the sheet cutting device is located downstream of the left and right scrap removal device (2). The sheet cutting device (3) includes a cutter (31) for cutting the continuously conveyed sheet into single sheets. The transverse cutter (21) and the cutter (31) share some of the cutting tools or the cutter (31) has a separate cutting tool and is located downstream of the left and right scrap removal device (2). It also includes a waste removal device, which is integrated into the left and right waste removal devices (2) or located downstream of the left and right waste removal devices (2). The waste removal device includes a drive (41) for removing waste from the sheet material conveying path.

2. The waste rejection mechanism of the flexible bag forming machine according to claim 1, characterized in that: It also includes a pressure plate (29), which can move relative to the transverse blade pad (22) to press the sheet material onto the transverse blade pad (22) when scrapping from the left and right. The pressure plate (29) has a blade groove (291) through which the transverse cutter (21) passes.

3. The waste rejection mechanism of the flexible bag forming machine according to claim 1, characterized in that: A conveyor belt (23) is provided on the outside or above the transverse blade pad (22), and an air suction hole connected to a negative pressure source (24) is provided on the conveyor belt (23).

4. The waste rejection mechanism of the flexible bag forming machine according to claim 3, characterized in that: The conveyor belt (23) and the transverse blade pad (22) are connected to a transverse motion power source. When the transverse cutter (21) cuts the sheet material, the transverse blade pad (22) is located below the sheet material and the transverse cutter (21) does not contact the conveyor belt (23). When the sheet material is conveyed forward, the conveyor belt (23) is located below the sheet material.

5. The waste rejection mechanism of the flexible bag forming machine according to claim 1, characterized in that: The waste removal device includes a waste collection chamber (61) below the sheet material conveying path, and a drive (41) is provided above the waste collection chamber (61) to act on the waste and provide the waste to move toward the waste collection chamber (61).

6. The waste rejection mechanism of the flexible bag forming machine according to claim 5, characterized in that: The drive unit (41) includes an air blower located above the sheet conveying path and / or a pusher located above the sheet conveying path that can move up and down.

7. The rejecting mechanism of the flexible bag forming machine according to claim 1, characterized in that: The waste removal device is integrated on the left and right waste removal devices (2). There is a channel (25) between the transverse blade pads (22) on the front and rear sides of the conveying direction for the waste to pass downward. The waste collection chamber (61) is located below the channel (25) when the transverse cutter (21) cuts the sheet material.

8. The waste rejection mechanism of the flexible bag forming machine according to claim 1, characterized in that: The longitudinal cutter (11) moves relative to the continuously conveyed sheet material along the conveying direction, and the transverse cutter (21) moves relative to the continuously conveyed sheet material to cut the waste material laterally.

9. The waste rejection mechanism of the flexible bag forming machine according to claim 1, characterized in that: The sheet material is conveyed longitudinally, and the transverse cutter (21) can reciprocate perpendicular to the conveying direction to cut the waste material laterally.

10. The waste rejection mechanism of the flexible bag forming machine according to claim 9, characterized in that: The left and right waste removal device (2) includes a crossbeam (26), a horizontally extending guide rail (27) is provided on the crossbeam (26), a slider (28) is slidably provided on the guide rail (27), and a horizontal cutter (21) is connected to the slider (28); the slider (28) on the guide rail (27) is equipped with a horizontal cutter (21) at the front and back respectively, and the horizontal cutter (21) at the front and back cuts the front and back edges of the waste material horizontally.

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