Plastic cup rim sealing detection system

Abstract

The invention relates to the technical field of sealing detection, in particular to a plastic cup opening sealing detection system which comprises a shell, side blocking parts arranged in the shell and a negative pressure generator arranged on the shell, the side blocking parts are matched with the cup bottom and the cup opening of a plastic cup to be detected respectively, a material passing gap is formed between every two adjacent side blocking parts, and the negative pressure generator is arranged on the shell. During use, the inverted to-be-detected plastic cup can be flexibly positioned through the supporting and leaning mechanism, so that the negative pressure strength is gradually enhanced until the negative pressure strength reaches the standard, the suction strength of the to-be-detected plastic cup is changed, and a creep leakage test is performed on the to-be-detected plastic cup; after the material passing gap is opened, the to-be-detected plastic cup is placed in the containing box, so that the mutual extrusion or falling state of the to-be-detected plastic cup in actual adaptation is simulated, the to-be-detected plastic cup separated from the material passing gap is subjected to an instantaneous impact leakage test, and finally the true accuracy of a detection result is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of seal detection, and particularly to a plastic cup mouth seal detection system. Background Art

[0002] In industries such as food and beverage, plastic cups are often used for packaging. In order to avoid problems such as leakage or contamination caused by poor sealing of the cup mouth or insufficient sealing strength after the plastic cup is sealed, it is necessary to conduct spot checks on the sealing performance of the plastic cup mouths in batches. The existing detection methods usually involve placing the sealed plastic cup into a sealed housing with applied air pressure, and using a sensor to sense the change in air pressure to determine whether the sealed cup body leaks air.

[0003] For example, the Chinese patent with the application number CN202010984024.0 discloses a water cup air leakage detection device, including a housing, a fixing device, a detection device, a control component, an air pressure pump, a driving device, and a battery component. By setting a rotating waist component between the side blocking component and the forklift, using the air pressure pump to provide air pressure for the air duct on the control board, and using a sensor on the control board to detect the air pressure in the air duct, and judging whether the water cup leaks air through the change in air pressure. However, the method of using the change in air pressure only applies a static load to the statically sealed cup body. In actual use of the plastic cup mouth, the products often undergo mutual extrusion or dropping, etc., resulting in the gas inside the cup body impacting the sealing edge. Using this detection device cannot accurately simulate the instantaneous impact seal detection of the sealed cup body under actual use conditions. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a plastic cup mouth seal detection system to solve the technical problem that the existing technology only applies a static load to the statically sealed cup body, while in actual use of the plastic cup mouth, the products often undergo mutual extrusion or dropping, etc., resulting in the gas inside the cup body impacting the sealing edge, and using this detection device cannot accurately simulate the instantaneous impact seal detection of the sealed cup body under actual use conditions.

[0005] Based on the above purpose, the present invention provides a plastic cup mouth seal detection system, including a housing with a sealed cavity and a negative pressure generator for generating negative pressure in the sealed cavity. The detection system further includes: A rotating table rotatably arranged at the bottom of the sealed cavity; At least one supporting mechanism arranged on the upper end surface of the rotating table. The supporting mechanism includes side blocking components arranged oppositely and forming a material passing gap. There is at least one placement position for placing an inverted plastic cup to be inspected in the material passing gap, and the central axis of the plastic cup to be inspected at the placement position is offset from the central axis of the rotating table; A transmission mechanism for driving the side blocking components in the supporting mechanism to move closer to or away from each other; A clamping mechanism located at the placement position, the clamping mechanism is used to clamp the plastic cup to be inspected at the placement position after the side blocking member in the supporting mechanism moves to one of the positions; A driving mechanism for driving the rotating table to rotate.

[0006] Furthermore, the side blocking component is of a plug-in structure, and the side blocking component has arc-shaped extension sections on both sides of the material passing gap, and the arc-shaped extension sections match the side walls of the plastic cup to be inspected.

[0007] Furthermore, the transmission mechanism comprises: A rotating shaft slidably arranged on the rotating table; A support seat is arranged at the bottom of the housing, a sleeve is arranged on the upper part of the support seat, and the rotating shaft is rotatably arranged in the sleeve; A spherical transmission member whose back is fixedly connected to the rotating shaft; A spring 1 sleeved on the rotating shaft, one end of the spring 1 abutting against the inner wall of the sleeve head, and the other end of the spring 1 abutting against the back of the spherical transmission member; A driving motor is arranged in the housing, and a transmission roller is installed at the output end of the driving motor, and the outer edge of the transmission roller abuts against the lower spherical end of the spherical transmission member.

[0008] Furthermore, the clamping mechanism comprises: A mounting frame disposed at the upper end of the rotating table; A guide rod fixedly arranged in the mounting frame; A sliding plate that runs through the mounting frame transversely, the sliding plate is also slidably disposed on the guide rod, and the side blocking component is mounted on the sliding plate; A second spring is sleeved on the guide rod, one end of the second spring abuts against the inner wall of the mounting frame, and the other end of the second spring abuts against the sliding plate.

[0009] Furthermore, the driving mechanism comprises: A push-pull rod coaxially rotated on the upper end of the rotating shaft, wherein the upper end of the push-pull rod longitudinally penetrates the mounting frame; The connecting rods are hinged to both sides of the upper end of the push-pull rod, and the other ends of the connecting rods are hinged to the sliding plate.

[0010] Furthermore, a cylinder is provided at the bottom of the shell, a rack is installed at the output end of the cylinder, a flip seat is installed on the support seat through a transmission shaft, the drive motor is installed on the flip seat, a gear is installed on the transmission shaft, and the gear is meshed with the rack.

[0011] Further, a sealable cover is provided at the top of the outer shell.

[0012] Further, receiving boxes are provided on both sides of the sliding plate, and the bottom of the receiving box is horizontally placed below the mouth of the plastic cup to be inspected.

[0013] Further, a storage frame is provided in the receiving box, a receiving groove is provided below the two inverted plastic cups to be inspected on the rotating table, and color developing test papers are placed in both the receiving groove and the storage frame.

[0014] Further, the upper end surface of the rotating table is provided with a downward-extending arc surface, so that when the mouth of the plastic cup to be inspected leaks, the falling internal liquid flows to the periphery of the rotating table.

[0015] The beneficial effects of the present invention are as follows: Through the supporting mechanism, flexible positioning of the inverted plastic cup to be inspected can be achieved, and the negative pressure intensity can be gradually increased until it reaches the standard, so as to change the suction intensity on the plastic cup to be inspected, thereby performing a creep leakage test on the plastic cup to be inspected. At the same time, through the cooperation of the driving mechanism and the transmission mechanism, the rotating shaft rotates and rises, so that after the feeding gap is opened, the plastic cup to be inspected is placed into the receiving box, so as to simulate the mutual extrusion or falling state of the plastic cup to be inspected during actual adaptation, and perform an instantaneous impact leakage test on the plastic cup to be inspected that has left the feeding gap, ultimately ensuring the true accuracy of the detection result. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the internal structure of the present invention; Figure 2 It is a schematic diagram of the external structure of the present invention; Figure 3 It is an assembly schematic diagram of the rotating shaft and the driving mechanism in the present invention; Figure 4 It is an assembly schematic diagram of the rotating shaft and the driving mechanism from another perspective in the present invention; Figure 5 It is an assembly schematic diagram of the supporting mechanism and the transmission mechanism in the present invention; Figure 6 It is a schematic diagram of the installation state of the plastic cup to be inspected in the detection system of the present invention; Figure 7 It is a schematic diagram of the installation state of the plastic cup to be inspected on the side blocking member in the present invention; Figure 8 This is a schematic diagram of the state where the plastic cup to be inspected in the present invention collides with the receiving box.

[0018] The markings in the figure are: 1. Outer shell; 2. Side blocking member; 3. Negative pressure generator; 4. Plastic cup to be inspected; 5. Rotating table; 6. Receiving groove; 7. Rotating shaft; 8. Mounting frame; 9. Receiving box; 10. Support base; 11. Sleeve; 12. Spherical transmission member; 13. First spring; 14. Driving motor; 15. Transmission roller; 16. Guide rod; 17. Sliding plate; 18. Second spring; 19. Push-pull rod; 20. Connecting rod; 21. Cylinder; 22. Rack; 23. Transmission shaft; 24. Flipping seat; 25. Gear; 26. Sealing cover; 27. Storage frame. Specific embodiments

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second", and similar terms used in the present invention do not indicate any order, quantity, or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] In the first aspect of the present invention, a plastic cup mouth sealing detection system is proposed. As Figure 1-8 shown, it includes an outer shell 1 provided with a sealing cavity and a negative pressure generator 3 for generating negative pressure in the sealing cavity. The detection system further includes: A rotating table 5 rotatably provided at the bottom of the sealing cavity; At least one supporting mechanism provided on the upper end surface of the rotating table 5. The supporting mechanism includes side blocking members 2 that are oppositely arranged and form a material passing gap. There is at least one placement position for placing an inverted plastic cup 4 to be inspected in the material passing gap. The central axis of the plastic cup 4 to be inspected at the placement position is offset from the central axis of the rotating table 5; A transmission mechanism for driving the side blocking members 2 in the supporting mechanism to approach or separate from each other; The clamping mechanism located at the placement position is used to clamp the plastic cup 4 to be inspected at the placement position after the side blocking member 2 in the supporting mechanism moves to one of the positions. The driving mechanism for driving the rotating table 5 to rotate.

[0022] In this embodiment, during use, first place the two plastic cups 4 to be inspected with sealed mouths upside down between the side blocking members 2 on both sides. Since the side blocking members 2 are respectively matched with the bottom and mouth of the plastic cup 4 to be inspected, the flexible positioning of the upside-down plastic cup 4 to be inspected can be achieved through the supporting mechanism. Then start the negative pressure generator 3 to make the upper sealed cavity of the housing 1 in a negative pressure state, which can form a negative pressure suction effect on the liquid in the plastic cup 4 to be inspected. By gradually increasing the negative pressure intensity until it reaches the standard, the suction intensity on the plastic cup 4 to be inspected is changed. During this process, once there is a leakage due to poor sealing at the mouth of any plastic cup 4 to be inspected, the internally encapsulated liquid will be sucked out to complete the creep leakage test on the plastic cup 4 to be inspected on the side blocking member 2. Immediately, start the driving mechanism to drive the rotating table 5 to rotate. The rotation of the rotating table 5 drives the plastic cups 4 to be inspected on both sides to rotate synchronously, and drives the rotating shaft 7 to rise synchronously through the transmission mechanism. During the process of the rotating shaft 7 rotating and rising, the transmission mechanism drives the side blocking members 2 in the supporting mechanism to approach each other, which will open the feeding gap. The plastic cups 4 to be inspected on both sides will automatically separate from the side blocking members 2 under the action of centrifugal force and collide into the corresponding receiving boxes 9 on both sides, so as to simulate the mutual extrusion or dropping state of the plastic cups 4 to be inspected during actual adaptation, and conduct an instantaneous impact leakage test on the plastic cups 4 to be inspected that have left the feeding gap.

[0023] In this embodiment, as Figure 6 , Figure 7 , Figure 8 shown, the side blocking member 2 is of an inserted structure. The two sides of the side blocking member 2 at the feeding gap are arc-shaped extending sections, and the arc-shaped extending sections are matched with the side walls of the plastic cup 4 to be inspected. The mouth of the plastic cup 4 to be inspected faces downwards and is stably placed on the inserted side blocking member 2 at the lower position. The arc-shaped extending section of the inserted side blocking member 2 at the upper position is used to clamp and position the bottom of the plastic cup 4 to be inspected with a relatively small area and higher structural strength, so as to avoid damaging the sealing effect of the plastic cup 4 to be inspected due to clamping the mouth of the plastic cup 4 to be inspected.

[0024] In this embodiment, as Figure 3 , Figure 4 shown, the transmission mechanism includes: The rotating shaft 7 slidably arranged on the rotating table 5; The support seat 10 arranged at the inner bottom of the housing 1, and a sleeve 11 is provided on the upper part of the support seat 10. The rotating shaft 7 is rotatably arranged in the sleeve 11; The spherical transmission member 12 fixedly connected to the rotating shaft 7 at the back; A first spring 13 sleeved on a rotating shaft 7, one end of the first spring 13 abuts against the inner wall of the head of the sleeve 11, and the other end of the first spring 13 abuts against the back of the spherical transmission member 12; A driving motor 14 arranged in the housing 1, a transmission roller 15 is installed at the output end of the driving motor 14, and the outer edge of the transmission roller 15 abuts against the lower spherical end of the spherical transmission member 12; The transmission roller 15 is driven by the output end of the driving motor 14 to rotate, and then drives the rotating shaft 7 to rotate through the spherical transmission member 12, drives the rotating table 5 and the plastic cups 4 to be inspected on both sides to rotate synchronously, and drives the rotating shaft 7 to rise synchronously through the transmission mechanism. During the process of the rotating shaft 7 rotating and rising, the side blocking members 2 in the driving and supporting mechanism approach each other, which will cause the material passing gap to open, and the plastic cups 4 to be inspected on both sides will automatically separate from the side blocking members 2 under the action of centrifugal force. During this process, under the action of its own elastic force, the first spring 13 can keep the spherical transmission member 12 in contact with the outer edge of the transmission roller 15 at all times.

[0025] In this embodiment, as Figure 5 、 Figure 6 shown, the clamping mechanism includes: A mounting frame 8 arranged at the upper end of the rotating table 5; A guide rod 16 fixedly arranged in the mounting frame 8; A sliding plate 17 horizontally penetrating the mounting frame 8, the sliding plate 17 is also slidably arranged on the guide rod 16, and the side blocking member 2 is installed on the sliding plate 17; A second spring 18 sleeved on the guide rod 16, one end of the second spring 18 abuts against the inner wall of the mounting frame 8, and the other end of the second spring 18 abuts against the sliding plate 17. Under the action of its own elastic force, the second spring 18 can push and press the sliding plate 17 to slide on the guide rod 16, so that the side blocking member 2 can achieve a firm flexible positioning of the plastic cup 4 to be inspected, and in the way of flexible abutment of holding the bottom of the cup by the cup mouth, to avoid over-clamping and causing excessive extrusion to the plastic cup 4 to be inspected, and reducing the additional influence on the test result.

[0026] In this embodiment, as Figure 5 、 Figure 6 shown, the driving mechanism includes: A push-pull rod 19 coaxially and rotatably arranged at the upper end of the rotating shaft 7, and the upper end of the push-pull rod 19 longitudinally penetrates the mounting frame 8; Link rods 20 hinged to both sides of the upper end of the push-pull rod 19, and the other ends of the link rods 20 are hinged to the sliding plate 17; Through the rising rotating shaft 7, the top ends of the two sides of the connecting rod 20 are driven to rise synchronously through the push-pull rod 19. Then, the lower ends of the connecting rod 20 pull the two sides of the sliding plates 17 to move towards each other, thereby opening the material passing gap. Under the action of centrifugal force, the plastic cups 4 to be inspected on both sides can be automatically thrown out to both sides from between the material passing gaps. By controlling the rotation speed of the rotating shaft 7, the throwing speed of the plastic cups 4 to be inspected can be correspondingly changed, so as to simulate the falling states of the plastic cups 4 to be inspected from different extrusion intensities or different height positions.

[0027] In this embodiment, as Figure 3 shown, a cylinder 21 is provided at the bottom of the outer shell. A rack 22 is installed at the output end of the cylinder 21. A rotating seat 24 is installed on the support seat 10 through a transmission shaft 23. The driving motor 14 is installed on the rotating seat 24. A gear 25 is installed on the transmission shaft 23. The gear 25 meshes with the rack 22. When the cylinder 21 is in the unstarted state, the rotating seat 24 does not rotate, that is, the outer edge of the transmission roller 15 abuts against the lowest point of the spherical transmission member 12, and at this time, it is closest to the center point of the spherical transmission member 12. At this time, the rotating shaft 7 rotates at a low speed and does not rise; When the cylinder 21 is in the opened state, the output end of the cylinder 21 will drive the rack 22 to slide, drive the rotating seat 24 to rotate through the gear 25 and the transmission shaft 23, and can drive the transmission roller 15 to rotate synchronously, so that the abutting point of the outer edge of the transmission roller 15 and the spherical transmission member 12 shifts towards the high point direction, and then the purpose of lifting the rotating shaft 7 through the spherical transmission member 12 and increasing the rotation speed of the rotating shaft 7 is achieved.

[0028] In this embodiment, as Figure 1 、 Figure 2 shown, a seal cover 26 that can be opened and closed is provided at the top of the outer shell. Opening the seal cover 26 can freely place and take out the plastic cups 4 to be inspected, and closing the seal cover 26 can maintain the negative pressure state in the upper sealed cavity of the outer shell 1.

[0029] In this embodiment, as Figure 1 shown, receiving boxes 9 are provided on both sides of the sliding plate 17. The bottom of the receiving box 9 is horizontally placed below the cup mouths of the plastic cups 4 to be inspected, simulating the horizontal throwing state of the plastic cups 4 to be inspected, and ensuring that the plastic cups 4 to be inspected can be placed at the bottom of the receiving box 9.

[0030] In this embodiment, as Figure 6 、 Figure 8 shown, a storage frame 27 is provided in the receiving box 9. A receiving groove 6 is provided below the two inverted plastic cups 4 to be inspected on the rotating table 5. Color-developing test papers are placed in both the receiving groove 6 and the storage frame 27. By observing the color-developing test papers, it can be judged whether there is internal liquid leakage from the plastic cups 4 to be inspected, and the judgment of the test results is intuitive and convenient for replacement.

[0031] In this embodiment, as Figure 5 、 Figure 6As shown, the upper end surface of the rotating table 5 is arranged as an arc surface extending downward, so that when there is a leakage at the cup mouth of the plastic cup 4 to be inspected, the internal liquid that drops flows to the periphery of the rotating table 5. After the inspection, if there is a leakage at the cup mouth of the plastic cup 4 to be inspected, it is only necessary to rinse the periphery of the rotating table 5 with pure water, which is convenient for timely cleaning of the detection system.

[0032] Those of ordinary skill in the art should understand that the discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as above, which are not provided in detail for the sake of brevity.

[0033] The present invention aims to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plastic cup mouth seal detection system, comprising a housing (1) provided with a sealing cavity and a negative pressure generator (3) for generating negative pressure in the sealing cavity, characterized in that, The detection system further includes: A rotating table (5) rotatably provided at the bottom of the sealed cavity; At least one supporting mechanism provided on the upper end surface of the rotating table (5), the supporting mechanism includes side blocking members (2) arranged oppositely and forming a material passing gap, and at least one placing position for placing an inverted plastic cup to be inspected (4) is provided in the material passing gap, and the central axis of the plastic cup to be inspected (4) at the placing position is offset from the central axis of the rotating table (5); A transmission mechanism for driving the side blocking members (2) in the supporting mechanism to approach or separate from each other; A clamping mechanism located at the placing position, the clamping mechanism is used to clamp the plastic cup to be inspected (4) at the placing position after the side blocking members (2) in the supporting mechanism move to one of the positions; A driving mechanism for driving the rotating table (5) to rotate.

2. The plastic cup mouth sealing detection system according to claim 1, characterized in that, The side blocking member (2) is of an inserted structure, and both sides of the side blocking member (2) at the material passing gap are arc-shaped extending sections, and the arc-shaped extending sections are matched with the side wall of the plastic cup to be inspected (4).

3. A plastic cup mouth sealing detection system according to claim 1, characterized in that, The transmission mechanism includes: A rotating shaft (7) slidably provided on the rotating table (5); A support seat (10) provided at the inner bottom of the housing (1), a sleeve (11) is provided on the upper part of the support seat (10), and the rotating shaft (7) is rotatably provided in the sleeve (11); A spherical transmission member (12) fixedly connected to the back of the rotating shaft (7); A first spring (13) sleeved on the rotating shaft (7), one end of the first spring (13) abuts against the inner wall of the head of the sleeve (11), and the other end of the first spring (13) abuts against the back of the spherical transmission member (12); A driving motor (14) provided in the housing (1), a transmission roller (15) is installed at the output end of the driving motor (14), and the outer edge of the transmission roller (15) abuts against the lower spherical end of the spherical transmission member (12).

4. A plastic cup mouth sealing detection system according to claim 3, characterized in that, The clamping mechanism includes: A mounting frame (8) provided at the upper end of the rotating table (5); A guide rod (16) fixedly provided in the mounting frame (8); A sliding plate (17) horizontally penetrating the mounting frame (8), the sliding plate (17) is also slidably provided on the guide rod (16), and the side blocking member (2) is installed on the sliding plate (17); A second spring (18) sleeved on the guide rod (16), one end of the second spring (18) abuts against the inner wall of the mounting frame (8), and the other end of the second spring (18) abuts against the sliding plate (17).

5. A plastic cup mouth sealing detection system according to claim 4, characterized in that, The driving mechanism includes: A push-pull rod (19) coaxially and rotatably provided at the upper end of the rotating shaft (7), and the upper end of the push-pull rod (19) longitudinally penetrates the mounting frame (8); Link rods (20) hinged to both sides of the upper end of the push-pull rod (19), and the other ends of the link rods (20) are hinged to the sliding plate (17).

6. A plastic cup mouth sealing detection system according to claim 3, characterized in that, A cylinder (21) is provided at the bottom of the housing (1). A rack (22) is installed at the output end of the cylinder (21). A turnover seat (24) is installed on the support seat (10) through a transmission shaft (23). The drive motor (14) is installed on the turnover seat (24). A gear (25) is installed on the transmission shaft (23), and the gear (25) meshes with the rack (22).

7. A plastic cup mouth seal detection system according to claim 1, characterized in that, A seal cover (26) that can be opened and closed is provided at the top of the housing (1).

8. A plastic cup mouth sealing detection system according to claim 4, characterized in that, Receiving boxes (9) are provided on both sides of the sliding plate (17). The bottom of the receiving box (9) is horizontally placed below the mouth of the plastic cup (4) to be inspected.

9. A plastic cup mouth sealing detection system according to claim 8, characterized in that, A storage frame (27) is provided in the receiving box (9). A receiving groove (6) is provided below the two inverted plastic cups (4) to be inspected on the rotating table (5). Color-developing test papers are placed in both the receiving groove (6) and the storage frame (27).

10. A plastic cup mouth sealing detection system according to claim 1, characterized in that, The upper end surface of the rotating table (5) is provided with an arc surface extending downward, so that when the mouth of the plastic cup (4) to be inspected leaks, the falling internal liquid flows to the periphery of the rotating table (5).

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