Paper cup defect visual inspection device

Abstract

The invention relates to a paper cup defect visual inspection device, which belongs to the technical field of visual inspection, and comprises an inspection seat, a visual inspection mechanism, a water spraying mechanism, a paper cup defect detection mechanism and a paper cup defect detection mechanism, a rotating mechanism; and an adsorption mechanism. Through the arrangement of the rotating mechanism, the paper cup can be driven to rotate, an industrial camera can conveniently shoot images of the paper cup by 360 degrees, hot water can be sprayed out to act on the paper cup, and needle holes in the paper cup can be shown in a wet face mode under the impact effect of the hot water; moreover, an obvious water permeation phenomenon occurs at a thin part of the paper cup due to the impact of hot water, and if the connection part of the cup bottom and the cup body of the paper cup is not firmly sealed, water leakage occurs, and at the moment, whether the paper cup has defects is judged according to a picture shot by the industrial camera, so that the defect detection range of the paper cup is expanded, and the detection efficiency is improved. And the detection precision is improved, so that the performance of the paper cup can be accurately evaluated.

Description

Technical Field

[0001] This invention belongs to the field of visual inspection technology, and specifically relates to a visual inspection device for paper cup defects. Background Technology

[0002] In the production of paper cups, automated visual defect detection is a crucial and indispensable part of modern production lines. Sampling inspection is typically used when inspecting paper cups. During inspection, the cups are rotated at the inspection station so that a camera can capture a complete 360° image. Inspection includes: rim inspection; body inspection; printing inspection; bottom inspection; and shape / size inspection. The data obtained from these inspections determines whether the produced paper cups meet the standards.

[0003] Currently, when visually inspecting paper cups for defects during production, the paper cup is typically fixed on a rotatable base and then rotated so that an industrial camera can capture a complete 360° image of the cup. The captured image is then analyzed to determine if defects exist. While this method can detect defects, it is difficult to detect minor defects such as pinholes, uneven thickness, and whether the connection between the cup bottom and body is completely sealed. This makes it impossible to fully and accurately assess the performance of the paper cup. Therefore, a visual inspection device for paper cup defects is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a reasonably designed visual inspection device for paper cup defects in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A visual inspection device for paper cup defects includes an inspection base and a visual inspection mechanism. A controller is fixedly connected to the top of the inspection base, and a hot water tank is fixedly connected inside the inspection base. The device also includes: A water collection box is fixedly connected to the detection base, and a water spraying mechanism for spraying hot water onto the paper cup is installed on the water collection box; A rotating mechanism installed on top of a water spraying mechanism for rotating a paper cup includes a fixed ring, a turntable rotatably connected to the fixed ring, an impeller fixedly connected to the turntable located inside the fixed ring, and a water spraying hole with an inclined arrangement opened on the top of the fixed ring, which sprays hot water onto the inner surface of the paper cup in an inclined manner. An adsorption mechanism fixedly connected to a turntable for adsorbing and fixing paper cups.

[0006] As a further optimization of the present invention, the water spraying mechanism includes a water pump fixedly connected to the water collection box, the water pump's pumping end being fixedly connected to a pumping pipe, the pumping pipe passing through the hot water tank and extending into the hot water tank, the water pump's draining end being fixedly connected to a draining pipe, the draining pipe passing through the water collection box and being fixedly connected to the water collection box, and the draining pipe's side wall being fixedly connected to a water spraying pipe.

[0007] As a further optimization of the present invention, the water spray pipe is fixedly connected to the fixing ring, the water spray end of the water spray pipe is positioned directly opposite the blades of the impeller, and the fixing ring is fixedly connected to the top of the drain pipe.

[0008] As a further optimization of the present invention, the adsorption mechanism includes an air sleeve fixedly connected to a turntable, a suction cup fixedly connected to the top of the air sleeve, a piston cylinder fixedly connected inside the air sleeve, a connecting pipe fixedly connected to the side wall of the piston cylinder, a piston rod slidably connected inside the piston cylinder, a pressure regulating block rotatably connected to the bottom of the piston rod, and a return spring fixedly connected to the top of the pressure regulating block.

[0009] As a further optimization of the present invention, the piston rod and the gas sleeve are connected in a through-seal sliding connection, and the connecting pipe passes through the gas sleeve and is fixedly connected to the gas sleeve.

[0010] As a further optimization of the present invention, the piston rod extends through the top of the drain pipe, and the pressure regulating block is in a sealed sliding connection with the inner surface of the drain pipe.

[0011] As a further optimization of the present invention, the reset spring is sleeved on the outer surface of the piston rod, and the top of the reset spring is fixedly connected to the inner top of the drain pipe.

[0012] As a further optimization of the present invention, the visual inspection mechanism includes a fixed frame fixedly connected to the top of the inspection seat, an electric lead screw is mounted on the fixed frame, a lifting plate is threaded through the electric lead screw, the lifting plate is slidably connected to the fixed frame, an electric push rod is fixedly connected to the lifting plate, a mounting frame is fixedly connected to the output end of the electric push rod, and an industrial camera is fixedly connected to the mounting frame, the industrial camera being tilted.

[0013] As a further optimization of the present invention, the bottom of the water collection box is inclined, and a drain pipe is fixedly connected to the bottom of the water collection box.

[0014] The beneficial effects of this invention are as follows: 1. This invention utilizes a rotating mechanism. Hot water entering the rotating mechanism drives the mechanism to rotate, which in turn rotates the paper cup. This allows an industrial camera to capture 360° images of the paper cup. The hot water is also sprayed out through nozzles, impacting the paper cup and making any pinholes visible. The impact of the hot water causes water to seep through thinner sections of the paper cup. If the connection between the bottom and body of the cup is not properly sealed, leakage will occur. Furthermore, if the paper cup has a coating, the hot water will act on it. If the coating has defects, the hot water will also seep through. By using images captured by the industrial camera, the presence of defects in the paper cup can be determined, expanding the scope of defect detection and improving accuracy. This allows for precise evaluation of the paper cup's performance.

[0015] 2. This invention, through the design of the adsorption mechanism, ensures that when hot water enters the drain pipe at the start of paper cup testing, the accumulation of hot water will push the pressure regulating block to move slowly upward and compress the return spring, thereby causing the piston rod to move upward. At this time, the piston cylinder will draw gas from the air sleeve, causing the suction cup to generate negative pressure to adsorb the paper cup, thus fixing the paper cup and ensuring the water pressure in the spray pipe, thereby ensuring the rotation of the paper cup. After the test is completed, the paper cup can be automatically released. The operation is simple and quick, reducing the burden on personnel and improving the efficiency of paper cup testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the back of the present invention; Figure 3 This is a schematic diagram of the three-dimensional partial cross-sectional structure of the water collection box of the present invention; Figure 4 This is a schematic diagram of the installation of the water spray mechanism of the present invention; Figure 5 This is a three-dimensional structural diagram of the rotating mechanism and the adsorption mechanism of the present invention; Figure 6 This is a three-dimensional partial cross-sectional structural diagram of the adsorption mechanism of the present invention; Figure 7 This is a partial three-dimensional structural diagram of the water spray mechanism of the present invention.

[0017] In the diagram: 1. Detection base; 2. Controller; 3. Hot water tank; 4. Water collection box; 5. Drain pipe; 6. Vision inspection mechanism; 61. Fixing frame; 62. Electric lead screw; 63. Lifting plate; 64. Electric push rod; 65. Mounting bracket; 66. Industrial camera; 7. Water spraying mechanism; 71. Water pump; 72. Pumping pipe; 73. Drain pipe; 74. Spraying pipe; 8. Rotating mechanism; 81. Fixing ring; 82. Spray hole; 83. Turntable; 84. Impeller; 9. Adsorption mechanism; 91. Air jacket; 92. Suction cup; 93. Piston cylinder; 94. Connecting pipe; 95. Piston rod; 96. Pressure regulating block; 97. Return spring. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example: Figure 1 and Figure 2 As shown, a visual inspection device for paper cup defects includes an inspection base 1 and a visual inspection mechanism 6. A controller 2 is fixedly connected to the top of the inspection base 1, and the controller 2 is used to control the operation of the visual inspection device. A hot water tank 3 is fixedly connected inside the inspection base 1. The visual inspection mechanism 6 includes a fixed frame 61 fixedly connected to the top of the inspection base 1. An electric lead screw 62 is installed on the fixed frame 61. A lifting plate 63 is threaded through the electric lead screw 62. The lifting plate 63 is slidably connected to the fixed frame 61. An electric push rod 64 is fixedly connected to the lifting plate 63. A mounting frame 65 is fixedly connected to the output end of the electric push rod 64. An industrial camera 66 is fixedly connected to the mounting frame 65. The industrial camera 66 is tilted.

[0020] In use, the paper cup to be tested is fixed so that it is below the industrial camera 66. The height of the industrial camera 66 is adjusted according to the height of the paper cup. During adjustment, the electric lead screw 62 and the electric push rod 64 are activated until the industrial camera 66 can capture images of the body and bottom of the paper cup. Then, the paper cup can be rotated so that the industrial camera 66 can capture images of the paper cup from 360 degrees. After capturing the images, the images are sent to the controller 2, which analyzes them to determine whether there are any defects in the paper cup.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, a water collection box 4 is fixedly connected to the detection seat 1. The bottom of the water collection box 4 is inclined. A drain pipe 5 is fixedly connected to the bottom of the water collection box 4. A water spraying mechanism 7 for spraying hot water onto the paper cup is installed on the water collection box 4. A rotating mechanism 8 for rotating the paper cup is installed on the top of the water spraying mechanism 7. An adsorption mechanism 9 is installed on the rotating mechanism 8. The adsorption mechanism 9 is used to adsorb and fix the paper cup. The water spraying mechanism 7 includes a water pump 71 fixedly connected to the water collection box 4. The water pump 71 is fixedly connected to a water pump pipe 72. The water pump pipe 72 passes through the hot water tank 3 and extends into the hot water tank 3. The hot water tank 3 is filled with hot water and is equipped with an electric heating element (the electric heating element is existing technology and is not shown in the figure, so it will not be described in detail). The water pump 71 is fixedly connected to a drain pipe 73. The drain pipe 73 passes through the water collection box 4 and is fixedly connected to the water collection box 4. A water spraying pipe 74 is fixedly connected to the side wall of the drain pipe 73.

[0022] In use, the paper cup is placed over the adsorption end of the adsorption mechanism 9, and then the water pump 71 is started to draw hot water from the hot water tank 3 through the water pipe 72 and inject the hot water into the drain pipe 73. The hot water entering the drain pipe 73 will drive the adsorption mechanism 9 to adsorb and fix the paper cup, and then discharge it through the spray pipe 74 and drive the rotating mechanism 8 to rotate the adsorption mechanism 9, thereby causing the paper cup to rotate. At this time, the industrial camera 66 can take a 360-degree picture of the paper cup.

[0023] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the rotating mechanism 8 includes a fixed ring 81 fixedly connected to the top of the drain pipe 73, a spray pipe 74 fixedly connected to the fixed ring 81, a turntable 83 sealed and rotatably connected to the fixed ring 81, an impeller 84 fixedly connected to the part of the turntable 83 located inside the fixed ring 81, the spray end of the spray pipe 74 is set directly opposite the blade of the impeller 84, and a spray hole 82 is opened at the top of the fixed ring 81 in an inclined manner. There are multiple spray holes 82, and the spray holes 82 spray hot water onto the inner surface of the paper cup in an inclined manner.

[0024] During use, the hot water discharged from the spray pipe 74 impacts the impeller 84, causing it to rotate. This, in turn, drives the turntable 83 to rotate, which in turn drives the adsorption mechanism 9 to rotate, thus rotating the paper cup. This allows the industrial camera 66 to capture 360° images of the paper cup. Simultaneously, the hot water entering the fixing ring 81 is sprayed out through multiple inclined spray holes 82. The sprayed hot water impacts the inside and outside of the paper cup, making any pinholes visible on the surface. The impact of the hot water also causes significant water permeability in thinner areas of the paper cup. If the connection between the bottom and body of the paper cup is not properly sealed, leakage will occur. Furthermore, if there is a coating inside the paper cup, the hot water will act on the coating. If the coating has defects, the hot water will also penetrate. By using images captured by the industrial camera 66, the presence of defects in the paper cup can be determined, expanding the scope of defect detection and improving detection accuracy. This allows for precise evaluation of the paper cup's performance.

[0025] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the adsorption mechanism 9 includes an air jacket 91 fixedly connected to the turntable 83. A suction cup 92 is fixedly connected to the top of the air jacket 91. A piston cylinder 93 is fixedly connected inside the air jacket 91. A connecting pipe 94 is fixedly connected to the side wall of the piston cylinder 93. A through groove is opened at the top of the drain pipe 73. The connecting pipe 94 is positioned directly opposite the through groove to facilitate normal air extraction and exhaust of the connecting pipe 94. The connecting pipe 94 passes through the air jacket 91 and is fixedly connected to the air jacket 91. A piston rod 95 is slidably connected inside the piston cylinder 93. The piston rod 95 passes through the air jacket 91 and is slidably connected to the air jacket 91. The piston rod 95 passes through the top of the drain pipe 73. A pressure regulating block 96 is rotatably connected to the bottom of the piston rod 95. The pressure regulating block 96 is slidably connected to the inner surface of the drain pipe 73. A return spring 97 is fixedly connected to the top of the pressure regulating block 96. The return spring 97 is sleeved on the outer surface of the piston rod 95. The top of the return spring 97 is fixedly connected to the inner top of the drain pipe 73.

[0026] In use, first place the paper cup over the suction cup 92, ensuring the top of the suction cup 92 contacts the inner bottom of the paper cup. At this point, the paper cup is positioned on the outer surface of the fixing ring 81 with a gap between them. When hot water enters the drain pipe 73, the accumulation of hot water will push the pressure regulating block 96 upwards slowly, compressing the return spring 97, which in turn causes the piston rod 95 to move upwards. At this time, the piston cylinder 93 will draw gas from the air sleeve 91, creating a negative pressure on the suction cup 92 to adhere to the paper cup, thus securing it. When the pressure regulating block 96 moves upwards above the inlet end of the spray pipe 74, hot water will enter the spray pipe 74. At this point, the pressure regulating block 96 can increase the amount of hot water entering the spray pipe. The water pressure inside pipe 74 ensures that the hot water discharged from the spray pipe 74 can make the impeller 84 rotate when it impacts the impeller 84. When the impeller 84 rotates, it will make the turntable 83 rotate, which will then drive the paper cup to rotate through the air sleeve 91 and suction cup 92. At the same time, the piston rod 95 will rotate on the top of the pressure regulating block 96. When the test is completed, the water pump 71 will be turned off, and the pressure regulating block 96 will move downward under the action of the return spring 97, so that the gas in the piston cylinder 93 will enter the air sleeve 91, which will prevent the suction cup 92 from adhering to and fixing the paper cup, and the paper cup can be removed. The operation is simple and quick, reducing the burden on personnel and improving the efficiency of paper cup testing.

[0027] The specific working principle of this invention is as follows: When in use, first place the paper cup on the suction cup 92 so that the top of the suction cup 92 contacts the inner bottom of the paper cup. At this time, the paper cup is placed on the outer surface of the fixing ring 81 with a gap between them. Then, adjust the height of the industrial camera 66 according to the height of the paper cup. When adjusting, start the electric lead screw 62 and the electric push rod 64 until the industrial camera 66 can capture the body and bottom of the paper cup. Then, the water pump 71 is started, which draws hot water from the hot water tank 3 through the water pipe 72 and injects the hot water into the drain pipe 73. When the hot water enters the drain pipe 73, the accumulation of hot water will push the pressure regulating block 96 to move slowly upward and compress the return spring 97, thereby causing the piston rod 95 to move upward. At this time, the piston cylinder 93 will draw the gas in the air sleeve 91, causing the suction cup 92 to generate negative pressure to adsorb the paper cup, thereby fixing the paper cup. At this time, there is still a gap between the paper cup and the fixing ring 81. When the pressure regulating block 96 moves upward to above the water inlet end of the spray pipe 74, hot water will enter the spray pipe 74. At this time, the pressure regulating block 96 can increase the water pressure entering the spray pipe 74, ensuring that the hot water discharged from the spray pipe 74 can make the impeller 84 rotate when it impacts the impeller 84. The hot water discharged from the spray pipe 74 impacts the impeller 84, causing it to rotate. This, in turn, drives the turntable 83 to rotate, which in turn rotates the paper cup via the air sleeve 91 and suction cup 92. Simultaneously, the piston rod 95 rotates on top of the pressure regulating block 96, further rotating the paper cup. This allows the industrial camera 66 to capture 360° images of the paper cup. Meanwhile, the hot water entering the fixing ring 81 is sprayed out through multiple angled spray holes 82. The sprayed hot water impacts the inside and surface of the paper cup, causing any pinholes to become visible as wet surfaces. Furthermore, the impact of hot water will cause significant water permeability in the thinner parts of the paper cup. If the connection between the bottom and the body of the paper cup is not sealed properly, water leakage will occur. In addition, if there is a coating inside the paper cup, hot water will act on the coating. If there are defects in the coating, hot water will also seep through. At this time, the images taken by the industrial camera 66 are used to determine whether there are defects in the paper cup, which expands the scope of paper cup defect detection and improves the detection accuracy. This allows for a precise evaluation of the paper cup's performance. After taking the images, they are sent to the controller 2, which analyzes them to determine whether there are defects in the paper cup. Once the test is complete, the water pump 71 is turned off, and the pressure regulating block 96 moves downward under the action of the return spring 97, allowing the gas in the piston cylinder 93 to enter the air sleeve 91. This prevents the suction cup 92 from adhering to and fixing the paper cup, allowing the paper cup to be removed. The operation is simple and quick, reducing the burden on personnel and improving the efficiency of paper cup testing.

[0028] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A visual inspection device for paper cup defects, comprising an inspection base (1), a controller (2), and a visual inspection mechanism (6), characterized in that, Also includes: A water collection box (4) is fixedly connected to the detection seat (1), and a water spraying mechanism (7) for spraying hot water onto the paper cup is installed on the water collection box (4). A rotating mechanism (8) is installed on top of the water spraying mechanism (7) for rotating the paper cup. The rotating mechanism (8) includes a fixed ring (81), a turntable (83) is rotatably connected to the fixed ring (81), and an impeller (84) is fixedly connected to the part of the turntable (83) located inside the fixed ring (81). The top of the fixed ring (81) is provided with an inclined water spraying hole (82), and the water spraying hole (82) sprays hot water onto the inner surface of the paper cup in an inclined manner. An adsorption mechanism (9) is fixedly connected to the turntable (83) for adsorbing and fixing paper cups.

2. The visual inspection device for paper cup defects according to claim 1, characterized in that: The water spraying mechanism (7) includes a water pump (71) fixedly connected to the water collection box (4). The water pump (71) has a water pump pipe (72) fixedly connected to its pumping end and a water drain pipe (73) fixedly connected to its draining end. The water drain pipe (73) passes through the water collection box (4) and is fixedly connected to the water collection box (4). The side wall of the water drain pipe (73) is fixedly connected to a water spraying pipe (74).

3. The visual inspection device for paper cup defects according to claim 2, characterized in that: The water spray pipe (74) is fixedly connected to the fixing ring (81), the water spray end of the water spray pipe (74) is set directly opposite the blade of the impeller (84), and the fixing ring (81) is fixedly connected to the top of the drain pipe (73).

4. The visual inspection device for paper cup defects according to claim 2, characterized in that: The adsorption mechanism (9) includes an air sleeve (91) fixedly connected to a turntable (83), a suction cup (92) fixedly connected to the top of the air sleeve (91), a piston cylinder (93) fixedly connected inside the air sleeve (91), a connecting pipe (94) fixedly connected to the side wall of the piston cylinder (93), a piston rod (95) sealed and slidably connected inside the piston cylinder (93), a pressure regulating block (96) rotatably connected to the bottom of the piston rod (95), and a return spring (97) fixedly connected to the top of the pressure regulating block (96).

5. The visual inspection device for paper cup defects according to claim 4, characterized in that: The piston rod (95) is connected to the gas sleeve (91) through a sealed sliding connection, and the connecting pipe (94) passes through the gas sleeve (91) and is fixedly connected to the gas sleeve (91).

6. The visual inspection device for paper cup defects according to claim 4, characterized in that: The piston rod (95) passes through the top of the drain pipe (73), and the pressure regulating block (96) is in a sealed sliding connection with the inner surface of the drain pipe (73).

7. The visual inspection device for paper cup defects according to claim 4, characterized in that: The return spring (97) is sleeved on the outer surface of the piston rod (95), and the top of the return spring (97) is fixedly connected to the inner top of the drain pipe (73).

8. The visual inspection device for paper cup defects according to claim 1, characterized in that: The visual inspection mechanism (6) includes a fixed frame (61) fixedly connected to the top of the inspection seat (1). An electric lead screw (62) is installed on the fixed frame (61). A lifting plate (63) is threaded through the electric lead screw (62). The lifting plate (63) is slidably connected to the fixed frame (61). An electric push rod (64) is fixedly connected to the lifting plate (63). A mounting bracket (65) is fixedly connected to the output end of the electric push rod (64). An industrial camera (66) is fixedly connected to the mounting bracket (65). The industrial camera (66) is tilted.

9. A visual inspection device for paper cup defects according to claim 1, characterized in that: The bottom of the water collection box (4) is inclined, and the bottom of the water collection box (4) is fixedly connected to a sewage pipe (5).

10. A visual inspection device for paper cup defects according to claim 2, characterized in that: The controller (2) is fixedly connected to the top of the detection seat (1), and a hot water tank (3) is fixedly connected inside the detection seat (1). The water pump (72) passes through the hot water tank (3) and extends into the hot water tank (3).

Images