Defective product removing device for plastic woven bag making
By introducing visual inspection equipment and rejection mechanisms into the woven plastic bag production line, the problem of traditional devices being unable to centrally reject defective products at the output end of the cutting machine has been solved. This has enabled automatic screening of defective products and efficient collection of finished products, thereby improving production efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHOUKOU XINHUAZHENG PLASTIC PACKAGING CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional woven plastic bag production lines lack a defective product rejection device at the output end of the cutting and sewing machine, making it impossible to combine the detection results of visual inspection equipment with the defective bag rejection function at the output end of the cutting and sewing machine.
A device was designed that includes a visual inspection device, a fully automatic cutting machine, a conveyor, and a rejection mechanism. The rejection mechanism consists of a motor-driven bidirectional oscillating negative pressure feeder and a corner limiter, which is used to automatically screen superior and inferior products at the discharge end of the cutting machine and integrates a collection function.
It improved the efficiency and accuracy of woven plastic bag production, enabling the timely removal of defective bags and the centralized collection of finished bags.
Smart Images
Figure CN224168062U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of plastic woven bag production equipment, and in particular to a defective product removal device for plastic woven bag making. Background Technology
[0002] Visual inspection equipment, primarily based on visual inspection systems, uses industrial cameras to replace human eyes in performing functions such as identification, measurement, and positioning. A typical visual inspection system consists of a camera, lens, and light source, and can replace manual labor in inspecting barcode characters, cracks, packaging, surface coating integrity, dents, etc. Using visual inspection systems effectively improves the inspection speed and accuracy of production lines, significantly increasing output and quality, reducing labor costs, and preventing misjudgments caused by human eye fatigue. In woven plastic bag production, visual inspection equipment is introduced to inspect the appearance quality of woven plastic bags. It is often installed at the feeding end of fully automatic woven plastic bag cutting and sewing machines to improve production efficiency and ensure product quality.
[0003] When using visual inspection equipment in production, it is necessary to screen out the superior and inferior (defective) products, mainly to remove defective woven plastic bags. However, in the improvement of some traditional woven plastic bag production lines, it is considered that some visual inspection equipment is set at the front end of the cutting and sewing machine to inspect the tubular bags. The removal work cannot be completed at the visual inspection equipment process and can only be postponed to the output end of the cutting and sewing machine. Therefore, there is a lack of a device that is set at the output end of the cutting and sewing machine and integrates bag collection and defective bag removal into one unit. Utility Model Content
[0004] The purpose of this utility model is to provide a defective product rejection device for woven plastic bags, in order to solve the problem that in the improvement work of adding visual inspection equipment to traditional woven plastic bag production lines, there is a lack of a device that integrates bag collection and defective bag rejection at the output end of the cutting and sewing machine.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] A defective product rejection device for woven plastic bags includes a visual inspection device, a fully automatic cutting and sewing machine, a conveyor, and a rejection mechanism connected sequentially in the forward direction of the woven plastic bags. The rejection mechanism includes a base, a motor, and a bidirectional oscillating negative pressure feeder. Both the motor and the bidirectional oscillating negative pressure feeder are mounted on the base. The power output end of the motor is connected to the rotating part of the bidirectional oscillating negative pressure feeder. The air outlet of the bidirectional oscillating negative pressure feeder is connected to an external negative pressure tank, and the working end of the bidirectional oscillating negative pressure feeder is adapted to the discharge end of the conveyor and is provided with an air inlet.
[0007] A further technical solution is as follows: The bidirectional swing negative pressure feeder includes a hollow shaft, a hollow outer sleeve, an air collecting plate, suction rods, and a corner limiter. The hollow shaft is mounted on the column of the base, and the air outlet of the hollow shaft is connected to an external negative pressure tank. The hollow outer sleeve is rotatably mounted on the hollow shaft, and an arc-shaped air passage is provided between the hollow outer sleeve and the hollow shaft. The air collecting plate is mounted on the hollow outer sleeve and is connected to it. Several suction rods are mounted on the air collecting plate and are connected to it. The suction rods are adapted to the discharge end of the conveyor and are provided with air inlets. The fixed part of the corner limiter is mounted on the column, and the movable part of the corner limiter is mounted on the hollow outer sleeve.
[0008] A further technical solution is: the corner limiter includes a proximity sensor and two trigger blocks. The proximity sensor is mounted on the column, and the two trigger blocks are mounted on the hollow outer sleeve. The angle between the two trigger blocks is adapted to the angle of the arc-shaped air passage. The proximity sensor is electrically connected to the motor through a PLC controller.
[0009] A further technical solution is: a strip-shaped air inlet is provided on the outer circumferential surface of the hollow shaft, and an arc-shaped air outlet adapted to the strip-shaped air inlet is provided on the inner circumferential surface of the hollow outer sleeve.
[0010] A further technical solution is: the base is provided with two bearing plates located on both sides of the bidirectional swing negative pressure feeder.
[0011] A further technical solution is that an adjustable telescopic rod is provided between the base and the support plate.
[0012] A further technical solution is that the maximum swing angle of the bidirectional swing negative pressure feeder is greater than °, and both bidirectional limit angles are lower than the horizontal line.
[0013] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:
[0014] This utility model proposes a defective product rejection device for woven plastic bags. The device sets up a visual inspection device and a defective bag rejection mechanism at the inlet and outlet ends of the cutting and sewing machine, respectively. First, it allows the visual inspection device to easily inspect continuously tensioned tubular bags. Second, it transfers the defective bag rejection work to the cutting and sewing process, removing the cut-off defective parts. In addition to the rejection function, it also integrates the function of collecting normal finished bags, thereby improving the production efficiency and accuracy of woven plastic bags. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a defective product removal device for making plastic woven bags according to this utility model.
[0016] Figure 2 This utility model Figure 1 A schematic diagram of the middle rejection mechanism.
[0017] Figure 3 This utility model Figure 1 A schematic diagram of the hollow shaft and hollow outer sleeve.
[0018] Figure 4 This utility model Figure 1 A schematic diagram of the hollow outer shell structure.
[0019] Reference numerals: 1. Visual inspection equipment; 2. Fully automatic slit cutting machine; 3. Conveyor; 4. Rejection mechanism; 5. Woven plastic bag; 6. Base; 7. Motor; 8. Bidirectional swing negative pressure feeder; 9. Column; 10. Hollow shaft; 11. Hollow outer sleeve; 12. Air collection plate; 13. Suction rod; 14. Corner limiter; 141. Proximity sensor; 142. Trigger block; 15. Strip-shaped air inlet; 16. Arc-shaped air outlet; 17. Support plate; 18. Adjustable telescopic rod. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] Example 1:
[0027] This implementation example Figure 1 and Figure 2 As shown, a defective product rejection device for woven plastic bags includes a visual inspection device 1, a fully automatic cutting and sewing machine 2, a conveyor 3, and a rejection mechanism 4 connected sequentially in the forward direction of the woven plastic bag 5. The rejection mechanism 4 includes a base 6, a motor 7, and a bidirectional swing negative pressure feeder 8. The motor 7 and the bidirectional swing negative pressure feeder 8 are both mounted on the base 6. The power output end of the motor 7 is connected to the rotating part of the bidirectional swing negative pressure feeder 8. The air outlet end of the bidirectional swing negative pressure feeder 8 is connected to an external negative pressure tank, and the working end of the bidirectional swing negative pressure feeder 8 is adapted to the discharge end of the conveyor 3 and is provided with an air inlet.
[0028] Visual inspection equipment primarily consists of visual inspection systems. In traditional woven plastic bag production lines, replacing the entire production equipment is costly; therefore, it's common practice to collaborate with third-party companies to modify existing equipment. Visual inspection equipment 1 is a modified device formed by adding a visual inspection system to the tubular bag unwinding and conveying equipment. Its purpose is to perform visual inspection on the tensioned tubular bags during continuous conveying. Figure 1Under the illumination of lights, two CCD vision cameras inspect the top and bottom surfaces of the tubular bags, recording the quality of each section suitable for bagging and feeding this information back to the PLC controller. The PLC controller then controls the rejection mechanism 4 to separate the high-quality and low-quality woven plastic bags by placing them on the left and right sides respectively. This achieves a centralized system of automatic material collection and rejection, improving production efficiency and accuracy.
[0029] Example 2:
[0030] Based on the above embodiments, this embodiment shows that the bidirectional swing negative pressure feeder 8 includes a hollow shaft 10, a hollow outer sleeve 11, an air collecting plate 12, suction rods 13, and a corner limiter 14. The hollow shaft 10 is mounted on the column 9 of the base 6, and the air outlet of the hollow shaft 10 is connected to an external negative pressure tank. The hollow outer sleeve 11 is rotatably mounted on the hollow shaft 10, and an arc-shaped air passage is provided between the hollow outer sleeve 11 and the hollow shaft 10. The air collecting plate 12 is mounted on the hollow outer sleeve 11 and is connected to it. Several suction rods 13 are mounted on the air collecting plate 12 and are connected to it. The suction rods 13 are adapted to the discharge end of the conveyor 3 and are provided with air inlets. The fixed part of the corner limiter 14 is mounted on the column 9, and the movable part of the corner limiter 14 is mounted on the hollow outer sleeve 11.
[0031] When the woven plastic bag 5 is conveyed from the conveyor 3 (belt conveyor), it will fall onto the inclined suction rod 13. Based on the relevant information provided by the vision inspection equipment, the bidirectional swing negative pressure feeder 8 will perform the corresponding work. In the first case, when the finished woven plastic bag 5 falls onto the suction rod 13, the hollow shaft 10 connects to the negative pressure tank, and the suction rod 13 will suck up the woven plastic bag 5. The motor 7 drives the hollow outer sleeve 11 to rotate. During the rotation, due to the arc-shaped air passage, the negative pressure of the suction rod 13 will not stop until the hollow outer sleeve 11 reaches the limit rotation angle. At this time, the arc-shaped air passage will automatically disconnect, the negative pressure will stop, and the suction rod 13 will just move to the left, put down the finished bag, and then reset. In the second scenario, when the defective woven plastic bag 5 falls onto the suction rod 13, the hollow shaft 10 connects to the negative pressure tank, and the suction rod 13 will suck up the woven plastic bag 5. The motor 7 drives the hollow outer sleeve 11 to rotate. During the rotation, due to the arc-shaped air passage, the negative pressure of the suction rod 13 will not stop until the hollow outer sleeve 11 reaches its limit rotation angle. At this time, the arc-shaped air passage will automatically disconnect, the negative pressure will stop, and the suction rod 13 will just move to the right, put down the finished bag, and then reset.
[0032] Preferably, the corner limiter 14 includes a proximity sensor 141 and two trigger blocks 142. The proximity sensor 141 is mounted on the column 9, and the two trigger blocks 142 are mounted on the hollow outer sleeve 11. The angle between the two trigger blocks 142 is adapted to the angle of the arc-shaped air passage. The proximity sensor 141 is electrically connected to the motor 7 through a PLC controller.
[0033] The proximity sensor 141 and two trigger blocks 142 are used to control the left and right rotation angle of the bidirectional swing negative pressure feeder 8. This angle is greater than the arc angle of the arc-shaped air passage to ensure that the arc-shaped air passage can be disconnected at the extreme position in the left and right directions, so as to achieve the effect of mechanical air cut-off, eliminating the need for the use of electromagnetic air valves, and ensuring stable and reliable operation of the mechanical structure.
[0034] Preferably, such as Figure 3 and Figure 4 As shown, a strip-shaped air inlet 15 is provided on the outer circumferential surface of the hollow shaft 10, and an arc-shaped air outlet 16 adapted to the strip-shaped air inlet 15 is provided on the inner circumferential surface of the hollow outer sleeve 11.
[0035] The strip-shaped air inlet 15 is to ensure sufficient airflow, and the arc-shaped air outlet 16, based on sufficient airflow, ensures a certain rotation angle for the bidirectional oscillating negative pressure feeder 8.
[0036] It is worth noting that a dynamic seal ring is provided between the rotating surfaces of the hollow shaft 10 and the hollow outer sleeve 11. Figure 3 and Figure 4 (The unlabeled parts are drawn in the middle) to improve its sealing.
[0037] Preferably, the base 6 is provided with two bearing plates 17 located on both sides of the bidirectional swing negative pressure feeder 8.
[0038] The two support plates 17 are used to place defective bags and non-defective bags respectively.
[0039] Preferably, an adjustable telescopic rod 18 is provided between the base 6 and the support plate 17.
[0040] The adjustable telescopic rod 18 consists of two inner and outer sliding sleeves, which can be adjusted in height and locked with bolts to ensure the height of the bearing plate 17 and achieve the effect of adjusting the load capacity.
[0041] Preferably, the maximum swing angle of the bidirectional swing negative pressure feeder 8 is greater than 180°, and both bidirectional limit angles are below the horizontal line.
[0042] The extreme angles of the bidirectional swing negative pressure feeder 8 in both the left and right directions are tilted downwards. When the extreme angle position is reached, the negative pressure is not flowing, and the woven plastic bag 5 automatically slides off the suction rod 13 under the action of gravity.
[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A defective product removal device for woven plastic bags, characterized in that: The system includes a visual inspection device (1), a fully automatic cutting and sewing machine (2), a conveyor (3), and a rejection mechanism (4) connected sequentially in the forward direction of the woven plastic bag (5); wherein the rejection mechanism (4) includes a base (6), a motor (7), and a bidirectional swing negative pressure feeder (8). The motor (7) and the bidirectional swing negative pressure feeder (8) are both mounted on the base (6). The power output end of the motor (7) is connected to the rotating part of the bidirectional swing negative pressure feeder (8). The air outlet of the bidirectional swing negative pressure feeder (8) is connected to an external negative pressure tank. The working end of the bidirectional swing negative pressure feeder (8) is adapted to the discharge end of the conveyor (3) and is provided with an air inlet.
2. The defective product rejection device for woven plastic bags according to claim 1, characterized in that: The bidirectional swing negative pressure feeder (8) includes a hollow shaft (10), a hollow outer sleeve (11), an air collecting plate (12), a suction rod (13), and a corner limiter (14). The hollow shaft (10) is mounted on the column (9) of the base (6), and the air outlet of the hollow shaft (10) is connected to an external negative pressure tank. The hollow outer sleeve (11) is rotatably mounted on the hollow shaft (10), and the hollow outer sleeve (11) and the hollow shaft (10) are connected. An arc-shaped air passage is provided. The air collecting plate (12) is installed on the hollow outer jacket (11) and communicates with it. Several suction rods (13) are installed on the air collecting plate (12) and communicate with it. The suction rods (13) are adapted to the discharge end of the conveyor (3) and are provided with air inlets. The fixed part of the corner limiter (14) is installed on the column (9), and the movable part of the corner limiter (14) is installed on the hollow outer jacket (11).
3. The defective product rejection device for woven plastic bags according to claim 2, characterized in that: The corner limiter (14) includes a proximity sensor (141) and two trigger blocks (142). The proximity sensor (141) is mounted on the column (9), and the two trigger blocks (142) are mounted on the hollow outer sleeve (11). The angle between the two trigger blocks (142) is adapted to the angle of the arc-shaped air passage. The proximity sensor (141) is electrically connected to the motor (7) through a PLC controller.
4. The defective product rejection device for woven plastic bags according to claim 2, characterized in that: The hollow shaft (10) has a strip-shaped air inlet (15) on its outer circumferential surface, and the hollow outer sleeve (11) has an arc-shaped air outlet (16) that matches the strip-shaped air inlet (15) on its inner circumferential surface.
5. The defective product rejection device for woven plastic bags according to claim 1, characterized in that: The base (6) is provided with two bearing plates (17) located on both sides of the bidirectional swing negative pressure feeder (8).
6. The defective product rejection device for woven plastic bags according to claim 5, characterized in that: An adjustable telescopic rod (18) is provided between the base (6) and the support plate (17).
7. The defective product rejection device for woven plastic bags according to claim 1, characterized in that: The maximum swing angle of the bidirectional swing negative pressure feeder (8) is greater than 180°, and both bidirectional limit angles are lower than the horizontal line.