Quality inspection production line for plastic packaging products
By introducing double-sided visual inspection and mechanized sorting systems into the quality inspection production line, the problems of blind spots and process fragmentation in the quality inspection of plastic-sealed products have been solved, achieving efficient and accurate quality inspection and sorting, and reducing the risk of product contamination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FUJIAN SHANTUO TECH CO LTD
- Filing Date
- 2025-12-25
- Publication Date
- 2026-07-21
Smart Images
Figure CN121558620B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of industrial visual inspection technology, and in particular to a quality inspection production line for plastic-sealed products. Background Technology
[0002] Plastic-sealed products are increasingly used in the food and pharmaceutical industries, and their quality inspection typically includes two main stages: appearance defect identification and sealing performance testing. Currently, the quality inspection production lines widely used in the industry have significant structural deficiencies. The primary problem is the existence of blind spots and low automation. Mainstream equipment relies on a single-sided industrial camera, which can only capture defects such as black spots and missing prints on the top surface of the product, while bottom surface inspection must be done manually by stopping the machine and flipping it over. This operation not only reduces production line efficiency by more than 30%, but also increases the risk of product contamination due to human contact, especially for pharmaceutical packaging with strict aseptic requirements. Furthermore, omissions or visual obstructions during the flipping process result in a persistently high rate of missed bottom surface defects.
[0003] Secondly, another significant drawback of existing technologies lies in the fragmented inspection process and insufficient system integration. Visual inspection and sealing testing are often separated into two independent workstations. After visual inspection, products must be manually transferred to dedicated sealing testing equipment (such as a pneumatic compressor). This process fragmentation prevents the timely removal of defective products, easily leading to mixing with subsequent qualified products and affecting overall quality control. Furthermore, due to the lack of efficient mechanical linkages and automated sorting mechanisms, current sorting work heavily relies on worker visual judgment, with an error rate exceeding 15%, further reducing the reliability and efficiency of the production line.
[0004] Finally, the existing production line's sorting mechanism and product conveying and positioning methods are not perfect. Simple air-blowing or push-bar sorting methods cannot accurately separate and classify qualified and defective products, increasing subsequent processing costs and the risk of confusion. Meanwhile, the traditional conveyor belt structure is simple, and products are prone to displacement or vibration during inspection, leading to unstable image acquisition and affecting the uniformity of pressure application during sealing tests, ultimately reducing the consistency and reliability of test results. Overall, the existing technology lacks sufficient intelligence and coordination between modules, making it difficult to meet the requirements of modern high-speed, continuous, and high-hygiene production standards. Summary of the Invention
[0005] The purpose of this invention is to provide a quality inspection production line for plastic-sealed products to solve the problems mentioned in the background art.
[0006] The technical solution of this invention is: a quality inspection production line for plastic-sealed products, including a quality inspection table, a delivery component, a visual inspection mechanism, and a pressing component. The delivery component includes two pairs of L-shaped brackets fixed to both sides of the quality inspection table. A tension roller is rotatably mounted on each pair of L-shaped brackets. A delivery belt is sleeved on the two tension rollers. The delivery belt has multiple placement grooves evenly spaced, and each placement groove has a through groove. A protrusion adapted to the through groove is fixed to the outside of the tension roller. Two sets of visual inspection mechanisms are provided and installed in the middle of the surface of the quality inspection table. The visual inspection mechanism includes a gantry frame fixed to the outer walls of both sides of the quality inspection table. A pair of crossbeams are fixed, and mounting plates are fixed on both the crossbeams and the gantry frame. Industrial camera components are fixed on opposite sides of the two mounting plates. Two sets of vision inspection mechanisms work together with the through groove on the inspection conveyor belt to perform visual inspection on both sides of the plastic-sealed product. The pressing component is set at one end of the quality inspection table. The pressing component includes a C-shaped end plate. Multiple mounting brackets are fixed on the inner side wall of the C-shaped end plate. A guide roller is rotatably mounted on each mounting bracket. A reset support mechanism is provided on one side of the C-shaped end plate. An installation port is opened at the bottom of the C-shaped end plate. A movable shaft is rotatably mounted in the installation port. A C-shaped movable base plate that matches the installation port is fixedly mounted on the movable shaft.
[0007] Preferably, a receiving box is fixedly installed at one end of the quality inspection station near the C-shaped end plate, and receiving box one and receiving box two are slidably inserted into the receiving box. A side baffle frame is fixedly installed on one side of the top of the receiving box.
[0008] Preferably, the reset support mechanism includes a pair of fixed end cylinders fixed to one side of the side guard frame. The ends of the fixed end cylinders are fixedly connected to an electrically controlled valve pipe. Each fixed end cylinder has a piston rod slidably installed inside. The end of the piston rod is fixed to the outside of the C-shaped end plate. Each piston rod is fitted with a reset spring. The two ends of the reset spring are fixed to the C-shaped end plate and the fixed end cylinder, respectively.
[0009] Preferably, an extension block is fixed to one side of the end of the C-shaped end plate, and a secondary camera group is fixed to the bottom side of the extension block. A control module is provided inside the quality inspection station, and the visual inspection mechanism, the secondary camera group, and the electrically controlled valve tube are electrically connected to the control module.
[0010] Preferably, each of the test strips is fixedly connected to a through pipe near the placement trough, and the end of each through pipe is fixedly connected to a bottom cover. A pair of guide cylinders are fixedly fixed on the bottom cover, and guide posts are slidably installed inside each guide cylinder. The ends of the guide posts are fixedly connected to an arc-shaped cover, and a corrugated end is fixedly connected between the arc-shaped cover and the bottom cover. A second reset spring is sleeved on the guide post, and the two ends of the second reset spring are fixedly connected to the guide cylinder and the arc-shaped cover, respectively.
[0011] Preferably, a one-way air valve is fixedly installed at one end of the tube, and two air inlets are opened on the bottom cover. A one-way air inlet valve is fixedly installed in each air inlet. A through hole is opened in the part of the tube inside the inspection belt, and a connection hole corresponding to the through hole is opened in the placement trough.
[0012] Preferably, one of the L-shaped brackets near the C-shaped end plate has two sloping ends, which are used to abut against the arc head cover. The distance between this L-shaped bracket and the inspection conveyor belt is smaller than the distance between the other three L-shaped brackets and the inspection conveyor belt.
[0013] Preferably, a sliding frame is slidably installed on the gantry in the vertical direction. One side of the sliding frame is connected to a fastening bolt by a thread. A folding frame is fixed on one side of each of the two sliding frames. An electrostatic voltage roller is rotatably installed at the end of the folding frame. A pair of side frames are fixedly installed on the gantry. An arc head support plate is fixedly installed at the end of the two side frames. The top of the arc head support plate is in contact with the inspection belt.
[0014] Preferably, a fixed rack is fixedly installed at one end of the quality inspection table, and gears are fixedly installed at both ends of the movable shaft, with the gears meshing with the fixed rack.
[0015] The present invention provides an improved quality inspection production line for a plastic-sealed product, which, compared with the prior art, has the following improvements and advantages: Firstly, the present invention has two sets of visual inspection mechanisms located above and below the inspection conveyor belt, respectively. The industrial camera assembly directly photographs the bottom surface of the product through the through groove of the inspection conveyor belt. The product is conveyed step by step in the placement groove of the inspection conveyor belt, and the upper and lower cameras photograph synchronously. The control module compares the double-sided images (defects such as black spots and missing prints) in real time. It completely solves the problem of blind spots in single-sided inspection: the through groove design ensures that the bottom surface is photographed without obstruction, avoiding the efficiency loss caused by manual flipping (traditional production lines require machine stoppage for flipping) and the risk of product contamination. Secondly, this invention performs pressure testing directly after appearance inspection. The sorting action is automatically triggered by the mechanical structure, with a sorting accuracy of 100% (defective products are physically destroyed, and qualified products are transferred without contact), eliminating the misjudgment of manual sorting. At the same time, only sealed qualified products can push the C-shaped end plate, and leaking products are crushed and scrapped due to insufficient pressure. The detection sensitivity is adjustable (by replacing the return spring with one of different stiffness). Thirdly, after the defective products of this invention are crushed, they fall directly into the receiving box one through the C-shaped end plate guide groove. Qualified products and defective products enter the receiving box one and receiving box two through different paths, respectively, eliminating the risk of contamination and reducing manual cleaning contact. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a partial structural diagram of the inspection tape of the present invention; Figure 5 This is a schematic diagram of the internal structure of the arc-shaped head cover of the present invention; Figure 6 This is a schematic diagram of the fixed end cylinder and the slope end structure of the present invention; Figure 7 This is a schematic diagram of the C-shaped end plate and protrusion block structure of the present invention; Figure 8 This is a schematic diagram of the visual inspection mechanism structure of the present invention; Figure 9 This is a schematic diagram of the C-shaped movable base plate after it has been flipped over according to the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point B.
[0018] Figure label: 1. Quality inspection table; 101. L-shaped bracket; 102. Tension roller; 103. Protrusion block; 2. Inspection conveyor belt; 201. Placement trough; 202. Through groove; 203. Connecting hole; 3. Vision inspection mechanism; 301. Gantry frame; 302. Mounting plate; 303. Industrial camera assembly; 4. Receiving box; 401. Receiving drawer one; 402. Receiving drawer two; 5. Side guard frame; 501. Fixed rack; 6. C-shaped end plate; 601. C-shaped movable base plate; 602. Movable shaft; 603. Gear; 604. Mounting bracket; 60 5. Guide roller; 7. Sloping end; 8. Fixed end cylinder; 801. Electrically controlled valve pipe; 802. Piston rod; 803. Return spring one; 9. Folded frame; 901. Sliding frame; 902. Fastening bolt; 903. Static voltage roller; 10. Arc head cover; 11. Corrugated end; 12. Bottom cover; 13. Through pipe; 131. Through hole; 14. Guide column; 141. Guide cylinder; 15. Return spring two; 16. One-way air inlet valve; 17. One-way air outlet valve; 18. Extension block; 181. Secondary camera group; 19. Arc head support plate; 191. Side frame. Detailed Implementation
[0019] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] This invention provides an improved quality inspection production line for plastic-sealed products. The technical solution of this invention is as follows: like Figures 1 to 10 As shown, this embodiment of the invention provides a quality inspection production line for plastic-sealed products, including a quality inspection table 1, and further comprising: The inspection assembly includes two pairs of L-shaped brackets 101 fixed on both sides of the inspection table 1. Each pair of L-shaped brackets 101 is rotatably mounted with a tension roller 102. An inspection belt 2 is sleeved on the two tension rollers 102. The inspection belt 2 has multiple placement grooves 201 at equal intervals. Each placement groove 201 has a through groove 202. A protrusion 103 that matches the through groove 202 is fixed on the outside of the tension roller 102. It should be noted that a stepper motor can be installed on one side of one of the L-shaped brackets 101. The output shaft of the stepper motor is fixedly connected to the adjacent tension roller 102, and the adjacent tension roller 102 is rotated by the stepper motor at a fixed frequency.
[0021] The visual inspection mechanism 3 consists of two sets installed on the middle of the surface of the inspection table 1. The visual inspection mechanism 3 includes a gantry frame 301 fixed to the outer walls on both sides of the inspection table 1. A pair of crossbeams are fixed on the gantry frame 301. Mounting plates 302 are fixed on both the crossbeams and the gantry frame 301. Industrial camera components 303 are fixed on opposite sides of the two mounting plates 302. The two sets of visual inspection mechanisms 3 work together with the through grooves 202 on the inspection conveyor belt 2 to perform visual inspection on both sides of the plastic-sealed product. The visual inspection mechanism 3 is used to inspect the upper and lower surfaces of the plastic-sealed product. The inspection items include appearance defects such as black spots, missing printing on packaging, and blurred lettering.
[0022] A pressing assembly is located at one end of the quality inspection table 1. The pressing assembly includes a C-shaped end plate 6, on which multiple mounting brackets 604 are fixed. Each mounting bracket 604 is rotatably mounted with a guide roller 605. A reset support mechanism is provided on one side of the C-shaped end plate 6. An installation opening is provided at the bottom of the C-shaped end plate 6, and a movable shaft 602 is rotatably mounted in the installation opening. A C-shaped movable base plate 601 that matches the installation opening is fixedly mounted on the movable shaft 602. The pressing assembly is used to press the plastic-sealed packaging after visual inspection to detect whether the plastic-sealed packaging has air leakage or is not firmly sealed.
[0023] Furthermore, a receiving box 4 is fixedly installed at one end of the quality inspection table 1 near the C-shaped end plate 6. A receiving box 401 and a receiving box 402 are slidably inserted inside the receiving box 4. A side baffle frame 5 is fixedly installed on one side of the top of the receiving box 4.
[0024] Furthermore, the reset support mechanism includes a pair of fixed end cylinders 8 fixed to one side of the side guard frame 5. The ends of the fixed end cylinders 8 are fixedly connected to an electric control valve pipe 801. A piston rod 802 is slidably installed inside each fixed end cylinder 8. The end of the piston rod 802 is fixed to the outside of the C-shaped end plate 6. A reset spring 803 is sleeved on each piston rod 802. The two ends of the reset spring 803 are respectively fixed to the C-shaped end plate 6 and the fixed end cylinder 8.
[0025] Furthermore, an extension block 18 is fixed to one side of the end of the C-shaped end plate 6, and a secondary camera group 181 is fixed to the bottom side of the extension block 18. Using the secondary camera group 181, the product marking can be scanned before the plastic-sealed product is pressed. The quality inspection station 1 is equipped with a control module. The vision inspection mechanism 3, the secondary camera group 181, and the electric control valve tube 801 are electrically connected to the control module. When no defects are detected on the surface of the plastic-sealed packaging, the electric control valve tube 801 is in the open state. At this time, the protrusion 103 will also press against the plastic-sealed packaging. However, since the electric control valve tube 801 is open, as long as the pressure borne by the plastic-sealed packaging is greater than the supporting force of the return spring 803, the C-shaped end plate 6 and the piston rod 802 can move. If the plastic-sealed packaging leaks air or the sealing opening is not secure, resulting in a pressure significantly lower than the standard, the plastic-sealed packaging will be gradually flattened and will not push the C-shaped end plate 6 to move. It will then fall into the receiving box 402 along the C-shaped end plate 6. If the plastic-sealed packaging surface is free of defects and can withstand the pressure of the protrusion 103, it will push the C-shaped end plate 6 and the piston rod 802 to move.
[0026] Furthermore, each of the inspection conveyor belts 2 is fixedly connected to a connecting tube 13 near the placement trough 201. Each connecting tube 13 is fixedly connected to a bottom cover 12 at its end. A pair of guide cylinders 141 are fixedly fixed on the bottom cover 12. Guide columns 14 are slidably installed inside each guide cylinder 141. The ends of the guide columns 14 are fixedly connected to an arc-shaped cover 10. A corrugated end 11 is fixedly connected between the arc-shaped cover 10 and the bottom cover 12. A second reset spring 15 is sleeved on the guide column 14. The two ends of the second reset spring 15 are fixedly connected to the guide cylinder 141 and the arc-shaped cover 10, respectively.
[0027] Furthermore, a one-way air valve 17 is fixedly installed at one end of the through pipe 13, and two air inlets are opened on the bottom cover 12. A one-way air inlet valve 16 is fixedly installed in each air inlet. The part of the through pipe 13 located inside the inspection conveyor belt 2 has a through hole 131, and a connecting hole 203 corresponding to the through hole 131 is opened in the placement trough 201. With the above structure, when the arc head cover 10 abuts against the slope end 7, the arc head cover 10 can move towards the bottom cover 12, and the air inside enters the through pipe 13 along the one-way air valve 17. Finally, it bulges out through the through hole 131 and the connecting hole 203 to avoid the plastic-sealed product being negatively pressed against the placement trough 201, and to ensure smooth subsequent material feeding. Specifically, the airflow is used to forcibly separate the plastic-sealed product from the placement trough 201 to avoid qualified products from getting stuck. At the same time, the timing of the air jet is precise (triggered only at the end of the material feeding position), which does not affect the stability of the front-end inspection station. When the arc head cover 10 is disengaged from the slope end 7, the arc head cover 10 is reset by the action of the reset spring 15. At this time, outside air enters the bottom cover 12 through the one-way air intake valve 16 so that the relevant components can return to their original positions.
[0028] Furthermore, one of the L-shaped brackets 101 near the C-shaped end plate 6 has two beveled ends 7. The beveled ends 7 are used to abut against the arc head cover 10. In order to avoid the arc head cover 10 from interfering with the movement of other L-shaped brackets 101, the distance between the L-shaped bracket 101 with the beveled ends 7 and the inspection belt 2 is smaller than the distance between the other three L-shaped brackets 101 and the inspection belt 2.
[0029] Furthermore, a sliding frame 901 is slidably installed on the gantry frame 301 in the vertical direction. One side of the sliding frame 901 is connected to a fastening bolt 902 by thread. By removing and installing the fastening bolt 902, the position of the sliding frame 901 on the gantry frame 301 can be adjusted to facilitate the adjustment of its height. A folding frame 9 is fixed to one side of each of the two sliding frames 901. A static voltage roller 903 is rotatably installed at the end of the folding frame 9. A pair of side frames 191 are fixedly installed on the gantry frame 301. An arc head support plate 19 is fixedly installed at the end of the two side frames 191. The top of the arc head support plate 19 is in contact with the inspection conveyor belt 2. The arc head support plate 19 can support the inspection conveyor belt 2 to ensure uniform pressure when the product passes through.
[0030] Further details are attached. Figures 9-10 As shown, a fixed rack 501 is fixedly installed at one end of the quality inspection bench 1, and gears 603 are fixedly installed at both ends of the movable shaft 602. The gears 603 mesh with the fixed rack 501. When the C-shaped end plate 6 and the piston rod 802 move, the gears 603 on both sides of the movable shaft 602 will move along the fixed rack 501, thereby causing the C-shaped movable base plate 601 to move according to the attached... Figure 10 When the plastic-sealed packaging is flipped over, it will fall into the receiving box 401 under the guidance of the flipped C-shaped movable base plate 601 after it is removed from the placement sink 201.
[0031] The specific working method is as follows: When in use, the plastic-sealed packaging to be inspected is placed in the placement trough 201 on the inspection conveyor belt 2. As the inspection conveyor belt 2 moves, the plastic-sealed packaging will first pass through the static voltage roller 903. The static voltage roller 903 rolls the plastic-sealed packaging to make its surface smoother and adsorbs the adhering impurities on its surface, so as to avoid the impact of such impurities on the subsequent visual inspection mechanism 3 and eliminate misjudgment caused by foreign object interference. The inspection conveyor belt 2 is driven by a stepper motor, which causes the plastic-sealed packaging to pause briefly when passing through the electrostatic roller 903 and the vision inspection mechanism 3 to ensure the inspection effect. The upper and lower surfaces of the plastic-sealed packaging are visually inspected by the industrial camera components 303 distributed vertically. When a defect is detected, the industrial camera components 303 will identify the defect on the plastic-sealed packaging, mark it, and transmit the data to the control module inside the quality inspection station 1. In addition, when the plastic-sealed packaging moves under the extension block 18, the secondary camera group 181 will simultaneously identify the marked plastic-sealed packaging. When the plastic-sealed packaging moves to one end of the C-shaped end plate 6 along the inspection conveyor belt 2, if there is a defect on the surface of the plastic-sealed packaging, the secondary camera group 181 identifies the marked packaging and controls the closing of the electric control valve tube 801. When the plastic-sealed packaging moves to the middle of the C-shaped end plate 6, the protrusion 103 on the tension roller 102 moves into the corresponding through groove 202, thereby pressing the plastic-sealed packaging. Since the electric control valve tube 801 is closed, the C-shaped end plate 6 and the piston rod 802 will not be able to move until the plastic-sealed packaging is crushed, so as to facilitate the scrapping of defective products, and finally fall into the receiving box 402 along the C-shaped end plate 6. When no defects are detected on the surface of the plastic-sealed packaging, the electrically controlled valve tube 801 is in the open state. At this time, the protrusion 103 will also press against the plastic-sealed packaging. However, since the electrically controlled valve tube 801 is open, as long as the pressure borne by the plastic-sealed packaging is greater than the supporting force of the return spring 803, the C-shaped end plate 6 and the piston rod 802 can move. If the plastic-sealed packaging leaks air or the sealing opening is not secure, resulting in a pressure bearing significantly lower than the standard, the plastic-sealed packaging will gradually be flattened and will not push the C-shaped end plate 6 to move. It will then fall into the receiving box 402 along the C-shaped end plate 6. If the plastic-sealed packaging surface is defect-free and can withstand the pressure of the protrusion 103, it will push the C-shaped end plate 6 and piston rod 802 to move. At this time, the gears 603 on both sides of the movable shaft 602 will move along the fixed rack 501, thereby causing the C-shaped movable base plate 601 to move according to the attached... Figure 10 The plastic packaging is flipped over in the state shown. At this time, after the plastic packaging is removed from the placement sink 201, it can fall into the receiving box 401 under the guidance of the flipped C-shaped movable base plate 601, thereby realizing the dual detection of the plastic packaging and the rejection of defective products.
[0032] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A quality inspection production line for plastic-sealed products, comprising a quality inspection table (1), characterized in that, Also includes: The inspection assembly includes two pairs of L-shaped brackets (101) fixed on both sides of the inspection table (1). Each pair of L-shaped brackets (101) is rotatably mounted with a tension roller (102). An inspection belt (2) is sleeved on the two tension rollers (102). The inspection belt (2) is provided with multiple placement grooves (201) at equal intervals. Each placement groove (201) is provided with a through groove (202). A protrusion (103) that matches the through groove (202) is fixed on the outside of the tension roller (102). The visual inspection mechanism (3) consists of two sets installed on the middle of the surface of the inspection table (1). The visual inspection mechanism (3) includes a gantry frame (301) fixed on the outer walls of both sides of the inspection table (1). A pair of crossbeams are fixed on the gantry frame (301). Mounting plates (302) are fixed on both the crossbeams and the gantry frame (301). An industrial camera assembly (303) is fixed on the opposite side of the two mounting plates (302). The two sets of visual inspection mechanisms (3) cooperate with the through groove (202) on the inspection conveyor (2) to perform visual inspection on both sides of the plastic-sealed product. A pressing assembly is provided at one end of the quality inspection table (1). The pressing assembly includes a C-shaped end plate (6). Multiple mounting brackets (604) are fixed on the inner side wall of the C-shaped end plate (6). A guide roller (605) is rotatably mounted on each mounting bracket (604). A reset support mechanism is provided on one side of the C-shaped end plate (6). An installation port is opened at the bottom of the C-shaped end plate (6). A movable shaft (602) is rotatably mounted in the installation port. A C-shaped movable base plate (601) that matches the installation port is fixedly mounted on the movable shaft (602). The quality inspection station (1) has a receiving box (4) fixedly installed at one end near the C-shaped end plate (6). The receiving box (4) has a receiving drawer 1 (401) and a receiving drawer 2 (402) slidably inserted inside. A side baffle frame (5) is fixedly installed on one side of the top of the receiving box (4). The reset support mechanism includes a pair of fixed end cylinders (8) fixed to one side of the side frame (5). The ends of the fixed end cylinders (8) are fixedly connected to an electric control valve pipe (801). A piston rod (802) is slidably installed inside each fixed end cylinder (8). The end of the piston rod (802) is fixed to the outside of the C-shaped end plate (6). A reset spring (803) is sleeved on each piston rod (802). The two ends of the reset spring (803) are fixed to the C-shaped end plate (6) and the fixed end cylinder (8) respectively. An extension block (18) is fixed to one side of the end of the C-shaped end plate (6), and a secondary camera group (181) is fixed to the bottom side of the extension block (18). A control module is provided inside the quality inspection station (1). The visual inspection mechanism (3), the secondary camera group (181), and the electric control valve tube (801) are electrically connected to the control module. Each of the inspection tapes (2) is fixedly connected to a tube (13) near the placement trough (201). Each tube (13) is fixedly connected to a bottom cover (12) at its end. A pair of guide cylinders (141) are fixed on the bottom cover (12). Guide columns (14) are slidably installed inside the guide cylinders (141). The ends of the guide columns (14) are fixedly connected to an arc head cover (10). A corrugated end (11) is fixedly connected between the arc head cover (10) and the bottom cover (12). A second reset spring (15) is sleeved on the guide column (14). The two ends of the second reset spring (15) are fixedly connected to the guide cylinder (141) and the arc head cover (10) respectively.
2. The quality inspection production line for plastic-sealed products according to claim 1, characterized in that: One end of the tube (13) is fixedly installed with a one-way air valve (17). The bottom cover (12) has two air inlets, each with a one-way air inlet valve (16). The part of the tube (13) inside the inspection belt (2) has a through hole (131). The placement trough (201) has a connection hole (203) corresponding to the through hole (131).
3. The quality inspection production line for plastic-sealed products according to claim 2, characterized in that: Two beveled ends (7) are provided on one of the L-shaped brackets (101) near the C-shaped end plate (6). The beveled ends (7) are used to abut against the arc head cover (10). The distance between the L-shaped bracket (101) and the inspection conveyor (2) is smaller than the distance between the other three L-shaped brackets (101) and the inspection conveyor (2).
4. The quality inspection production line for plastic-sealed products according to claim 1, characterized in that: A sliding frame (901) is slidably installed on the gantry frame (301) in the vertical direction. A fastening bolt (902) is threadedly connected to one side of the sliding frame (901). A folding frame (9) is fixed on one side of each of the two sliding frames (901). A static voltage roller (903) is rotatably installed at the ends of the folding frame (9). A pair of side frames (191) are fixedly installed on the gantry frame (301). An arc head support plate (19) is fixedly installed at the ends of the two side frames (191). The top of the arc head support plate (19) is in contact with the inspection conveyor belt (2).
5. The quality inspection production line for plastic-sealed products according to claim 4, characterized in that: A fixed rack (501) is fixedly installed at one end of the quality inspection bench (1), and gears (603) are fixedly installed at both ends of the movable shaft (602). The gears (603) mesh with the fixed rack (501).