Aluminum foil lunch box air tightness testing equipment

Abstract

The invention discloses an air tightness detection device for an aluminum foil lunch box, which belongs to the technical field of aluminum foil lunch box production. A detection mechanism is arranged to start a lifting push rod and an air injection pump, so that the lifting push rod is lowered and drives an air tightness detection piece to be set on the surface of the aluminum foil lunch box body. Under the pressure of the air tightness detection piece, the aluminum foil lunch box body cannot move. At the same time, the air injection pump rises, penetrates through a mounting groove and is inserted into an air inlet valve, so that gas can be injected into a placement plate through the air inlet valve. If there are cracks on the surface of the aluminum foil lunch box body, the gas will overflow through the cracks, contact with an airtight film through a through hole opened on the surface of an inner shell body, and bulge under the restriction of a through hole opened on the surface of an outer shell body. The staff can determine that there are cracks on the surface of the aluminum foil lunch box body and confirm the location of the cracks. The physical performance test of the aluminum foil lunch box body can also be performed simultaneously by using air pressure detection. Potential cracks can be enlarged and appear in time under the impact of air pressure.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum foil lunch box production, and in particular to an aluminum foil lunch box air tightness detection device. Background Art

[0002] Aluminum foil lunch box is a widely used tableware, mainly used for food cooking, baking, freezing, preservation, etc. It is generally made of 3 series or 8 series aluminum ingot raw materials through cold rolling or hot rolling into aluminum foil mother rolls, and then through special equipment and molds. One-time fully automatic cold stamping forming, aluminum foil lunch box is light in weight, easy to carry and transport, has outstanding barrier properties, can withstand high temperature heating, suitable for cooking and heating food;

[0003] In the production process of aluminum foil lunch boxes, since most of them are formed by cold stamping, the bending parts of aluminum foil lunch boxes are prone to mechanical damage, which leads to cracking. In particular, round aluminum foil lunch boxes have a special circular structure and a large change in the curvature of the edge. Therefore, during the stamping process, stress concentration will occur at the edge of the round aluminum foil lunch box, resulting in greater tensile or shear stress in the area during stamping. If the material fluidity is insufficient or unevenly distributed, the risk of cracking may increase;

[0004] A cracked aluminum foil lunch box may not be able to maintain sealing when containing food, resulting in food leakage or contamination. Therefore, the surface of the aluminum foil lunch box is generally inspected visually to see if there are cracks, or non-destructive testing techniques such as X-rays or ultrasound are used to inspect the internal structure of the aluminum foil lunch box. However, in the actual production process, the use of X-rays and ultrasound for non-destructive testing has problems such as high cost, slow detection speed and small detection volume, and it cannot be combined with physical property tests to detect potential cracks. Summary of the invention

[0005] The purpose of the present invention is to propose an airtightness testing device for aluminum foil lunch box in order to solve the problems of high cost, slow testing speed and small testing amount in non-destructive testing using X-rays and ultrasound, and the problem that it cannot be combined with physical property testing to detect potential cracks.

[0006] In order to achieve the above purpose, the present invention adopts the following technology: an aluminum foil lunch box air tightness detection device:

[0007] It includes a base and an aluminum foil lunch box body, wherein a driving motor, a lifting push rod and an air injection pump are sequentially installed on the base, a turntable is installed on the output end of the driving motor, the lifting push rod and the air injection pump have the same axial position, and the air injection pump is driven to rise synchronously when the lifting push rod descends, and four detection mechanisms are installed on the turntable, the detection mechanisms include four mounting grooves connected to the turntable, and a placement plate is installed on the mounting groove, and the aluminum foil lunch box body is placed on the placement plate;

[0008] The installation groove and the middle of the placement plate are both provided with through holes, and an air intake valve is installed in the through hole of the placement plate, the air intake valve can be inserted into the through hole of the installation groove, and the air injection pump can be inserted into the air intake valve to inject air into the aluminum foil lunch box body;

[0009] The lifting push rod is equipped with an airtight detection member, which includes an airtight film covering the aluminum foil lunch box body. The gas leaking from the aluminum foil lunch box body causes the airtight film to swell.

[0010] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0011] The aluminum foil lunch box body is fixed on the placement plate by a clamping mechanism, the clamping mechanism includes a chassis assembled on the base, the turntable runs through the middle of the chassis and the four mounting grooves are all located inside the chassis;

[0012] The clamping mechanism also includes a lower trough body, an upper cover body and a plurality of supporting members connecting the lower trough body and the upper cover body, the lower trough body and the upper cover body form a chamber, four movable pressing plates are arranged inside the chamber, and the four pressing plates are combined into a ring that fits the outer wall of the aluminum foil lunch box body.

[0013] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0014] The airtight detection component also includes an outer shell connected to the lifting push rod and an inner shell connected to the outer shell. The inner shell is attached to the surface of the aluminum foil lunch box body. A plurality of through holes are provided on the surfaces of the inner shell and the outer shell. An airtight film is provided between the inner shell and the outer shell, and the airtight film can bulge from the through holes.

[0015] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0016] The mounting groove divides the interior of the chassis into areas a, b, c and d;

[0017] The aluminum foil lunch box body is placed in area a, rotated to area b and fixed by a clamping mechanism, and then rotated to area c. The lifting push rod, air injection pump and airtight detection component in area c are tested. After the test is completed, it is rotated to area d to release the clamping mechanism from fixing the aluminum foil lunch box body.

[0018] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0019] The pressing plate is driven to move by a driving member, which includes a rotating shaft rotatably arranged on the lower tank body, and an eccentric wheel is rotatably arranged on the surface of the rotating shaft, and the end of the eccentric wheel is rotatably connected to a push rod through a first shaft rod, and the end of the push rod is rotatably connected to the pressing plate through a second shaft rod;

[0020] The bottom end of the second shaft rod is connected with a sliding block, and the lower trough body is provided with a sliding rail parallel to the moving direction of the pressing plate, and the sliding block is slidably embedded in the sliding rail.

[0021] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0022] The push rod of the turntable is shorter than the push rods at other positions. The push rod rotates with the rotating shaft and pulls the pressure plate to be removed from the aluminum foil lunch box body faster than other pressure plates.

[0023] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0024] The surface of the pressing plate is provided with a through hole for the slide rail to pass through.

[0025] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0026] The lower tank body and the upper cover body are provided with guide grooves, and a rotating ring is rotatably embedded in the two guide grooves, and a plurality of second teeth are equidistantly arranged around the inner surface of the rotating ring;

[0027] The rotating shaft is equipped with gears, and the four gears are meshed with the second teeth.

[0028] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0029] The inner wall of the chassis is equipped with a first rack and a second rack at area b and area d respectively;

[0030] A plurality of first teeth are equidistantly arranged around the outer surface of the rotating ring, and the first teeth mesh with the first rack and the second rack in sequence and rotate as the mounting groove rotates.

[0031] As a further description of the above-mentioned technology, an aluminum foil lunch box air tightness detection device:

[0032] The placing plate drives the aluminum foil lunch box body to move up and down through a pressing mechanism, and the pressing mechanism includes an extension plate arranged at the outer edge of the placing plate and an adjustment cavity opened on the inner wall of the lower tank body, and the extension plates are inserted into the adjustment cavity;

[0033] The bottom end of the placement plate is provided with no less than two telescopic rods, and the telescopic rods penetrate the telescopic grooves provided on the inner wall of the lower tank body, and a spring is provided between the telescopic rods and the telescopic grooves;

[0034] The extension plate is provided with two grooves, and a push block is arranged at the bottom of the slider, which passes through the lower groove body and is inserted into the adjusting cavity, and the bottom end of the push block is in contact with the surface of the extension plate and can be embedded in the groove, and the contact surfaces of the push block and the groove are both arranged to be inclined.

[0035] In summary, due to the use of the above-mentioned technology, the invention provides an aluminum foil lunch box air tightness detection device, and the beneficial effects are:

[0036] 1. After placing the aluminum foil lunch box body on the placement plate through the detection mechanism, start the lifting push rod and the air injection pump to make the lifting push rod descend and drive the airtight detection piece set on the surface of the aluminum foil lunch box body. Under the pressure of the airtight detection piece, the aluminum foil lunch box body cannot move. At the same time, the air injection pump rises through the installation groove and inserts into the inside of the air inlet valve, so that the gas can be injected into the inside of the placement plate through the air inlet valve. When there are cracks on the surface of the aluminum foil lunch box body, the gas will overflow through the cracks and pass through the through holes opened on the surface of the inner shell. The gas can contact the airtight film and bulge under the restriction of the through holes opened on the surface of the outer shell. The staff can determine that there are cracks on the surface of the aluminum foil lunch box body and confirm the location of the cracks. Compared with non-destructive testing methods such as X-rays and ultrasonic waves, the use of air pressure testing can also test the physical properties of the aluminum foil lunch box body at the same time. Potential cracks can expand and appear in time under the impact of air pressure;

[0037] 2. Through the set downward pressing mechanism, the slider drives the push block to slide out of the groove and squeeze the extension plate during the sliding process, so that the extension plate moves downward with the placement plate and drives the telescopic rod to move inside the telescopic groove. The telescopic rod cooperates with the telescopic groove extrusion spring to produce elastic deformation. As the push block continues to move, the push block is embedded in the next groove. At this time, the telescopic rod drives the placement plate to rise under the push of the elastic deformation recovery of the push block, so that the placement plate first drives the aluminum foil lunch box body to descend to avoid the horizontally moving pressure plate, and then lifts it to fit the bottom of the pressure plate moved to the specified position, thereby avoiding the extrusion deformation caused by the contact between the aluminum foil lunch box body and the pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the three-dimensional structure of an aluminum foil lunch box air tightness detection device provided according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic cross-sectional structure diagram of an aluminum foil lunch box air tightness detection device provided according to an embodiment of the present invention is shown;

[0040] Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0041] Figure 4 The embodiment of the present invention provides Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0042] Figure 5A schematic diagram of a three-dimensional split structure of a pressing mechanism provided in an embodiment of the present invention is shown;

[0043] Figure 6 A schematic diagram of a three-dimensional disassembled structure of an airtight detection component provided in an embodiment of the present invention is shown;

[0044] Figure 7 A schematic diagram of the three-dimensional structure of a turntable, a mounting slot and a chassis provided according to an embodiment of the present invention is shown;

[0045] Figure 8 A schematic diagram of the three-dimensional structure of a lower tank body, a support member and an upper cover body provided in an embodiment of the present invention is shown;

[0046] Fig. 9 A partial three-dimensional structural schematic diagram of a clamping mechanism provided according to an embodiment of the present invention is shown;

[0047] Fig.10 A schematic diagram of the three-dimensional structure of a placement plate provided according to an embodiment of the present invention is shown;

[0048] Fig.11 A schematic cross-sectional structure diagram of a clamping mechanism provided according to an embodiment of the present invention is shown;

[0049] Fig.12 The embodiment of the present invention provides Fig.11 Schematic diagram of the enlarged structure at C in the middle;

[0050] Fig.13 The embodiment of the present invention provides Fig.11 Schematic diagram of the enlarged structure at D in the middle;

[0051] Fig.14 It shows a schematic diagram of the three-dimensional structure when the driving member provided in the embodiment of the present invention pushes the pressing plate to extend;

[0052] Fig.15 A schematic diagram of the three-dimensional structure when a driving member according to an embodiment of the present invention pulls a pressing plate back is shown.

[0053] Legend:

[0054] 11. Base; 12. Driving motor; 13. Turntable; 14. Lifting push rod; 15. Air injection pump; 16. Aluminum foil lunch box body;

[0055] 20. Detection mechanism; 21. Mounting groove; 22. Placement plate; 23. Air inlet valve; 24. Airtight detection member; 241. Inner shell; 242. Airtight film; 243. Outer shell;

[0056] 30. Clamping mechanism; 31. Chassis; 311. First rack; 312. Second rack; 32. Lower tank; 33. Support member; 34. Upper cover; 35. Guide groove; 36. Rotating ring; 37. First tooth; 38. Second tooth; 39. Driving member; 391. Rotating shaft; 392. Gear; 393. Eccentric wheel; 394. First shaft; 395. Push rod; 396. Second shaft; 397. Sliding block; 398. Sliding rail; 310. Pressing plate;

[0057] 40. Pressing mechanism; 41. Extension plate; 42. Groove; 43. Adjusting cavity; 44. Push block; 45. Telescopic slot; 46. Spring; 47. Telescopic rod. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, an aluminum foil lunch box air tightness detection device. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In order to solve the problems of high cost, slow detection speed and small detection volume of non-destructive testing using X-rays and ultrasound, and the problem that it cannot be combined with physical property testing to detect potential cracks, the present invention proposes an aluminum foil lunch box airtightness detection device, such as Figure 1 - Fig.15 As shown:

[0060] The invention comprises a base 11 and an aluminum foil lunch box body 16, wherein a driving motor 12, a lifting push rod 14 and an air injection pump 15 are sequentially mounted on the base 11, a turntable 13 is mounted on the output end of the driving motor 12, the lifting push rod 14 and the air injection pump 15 have the same axial position, and the lifting push rod 14 drives the air injection pump 15 to rise synchronously when the lifting push rod 14 descends, and four detection mechanisms 20 are mounted on the turntable 13, and the detection mechanisms 20 include four mounting grooves 21 connected to the turntable 13, and a placement plate 22 is mounted on the mounting groove 21, and the aluminum foil lunch box body 16 is placed on the placement plate 22;

[0061] Through holes are provided in the middle of the mounting groove 21 and the placement plate 22, and an air intake valve 23 is installed in the through hole of the placement plate 22. The air intake valve 23 can be inserted into the through hole of the mounting groove 21, and the air injection pump 15 can be inserted into the air intake valve 23 to inject air into the aluminum foil lunch box body 16;

[0062] The lifting push rod 14 is equipped with an airtight detection member 24, which includes an outer shell 243 connected to the lifting push rod 14 and an inner shell 241 connected to the outer shell 243. The inner shell 241 is attached to the surface of the aluminum foil lunch box body 16. A plurality of through holes are provided on the surfaces of the inner shell 241 and the outer shell 243. An airtight film 242 is provided between the inner shell 241 and the outer shell 243. The gas leaked from the aluminum foil lunch box body 16 causes the airtight film 242 to bulge from the through holes.

[0063] After placing the aluminum foil lunch box body 16 on the placement plate 22, start the lifting push rod 14 and the air injection pump 15, so that the lifting push rod 14 descends and drives the airtight detection part 24 to be sleeved on the surface of the aluminum foil lunch box body 16. Under the pressure of the airtight detection part 24, the aluminum foil lunch box body 16 cannot move. At the same time, the air injection pump 15 rises, penetrates the installation groove 21 and is inserted into the inside of the air inlet valve 23, so that the gas can be injected into the inside of the placement plate 22 through the air inlet valve 23. If there are cracks on the surface of the aluminum foil lunch box body 16, the gas will overflow through the cracks, contact the airtight film 242 through the through holes opened on the surface of the inner shell 241, and bulge under the restriction of the through holes opened on the surface of the outer shell 243. The staff can determine that there are cracks on the surface of the aluminum foil lunch box body 16 and confirm the location of the cracks. Compared with non-destructive testing methods such as X-rays and ultrasound, the use of air pressure testing can also perform physical property tests on the aluminum foil lunch box body 16 at the same time, and potential cracks can expand and appear in time under the impact of air pressure.

[0064] like Figure 3 , Figure 4 and Figure 5 As shown, in order to detect multiple aluminum foil lunch box bodies 16 in sequence and fix the positions of the aluminum foil lunch box bodies 16 before the sequential detection to avoid the position of the aluminum foil lunch box bodies 16 from shifting during the movement, the aluminum foil lunch box bodies 16 are fixed on the placement plate 22 by a clamping mechanism 30, and the clamping mechanism 30 includes a chassis 31 assembled on the base 11, the turntable 13 passes through the middle of the chassis 31 and the four mounting grooves 21 are all located inside the chassis 31;

[0065] The pressing mechanism 30 further includes a lower tank body 32, an upper cover body 34 and a plurality of supporting members 33 connected to the lower tank body 32 and the upper cover body 34, the lower tank body 32 and the upper cover body 34 forming a chamber, and four movable pressing plates 310 are arranged inside the chamber, and the four pressing plates 310 are assembled and combined into a ring that fits the outer wall of the aluminum foil lunch box body 16;

[0066] The mounting groove 21 divides the interior of the chassis 31 into areas a, b, c and d;

[0067] When the aluminum foil lunch box body 16 needs to be loaded, the aluminum foil lunch box body 16 is first placed on the placement plate 22 in area a. An annular protrusion is provided on the top of the placement plate 22. The outer diameter of the annular protrusion is the same as the inner diameter of the aluminum foil lunch box body 16. Through this design, the inner wall of the aluminum foil lunch box body 16 can fit with the protrusion provided on the top of the placement plate 22, thereby achieving the purpose of fixing the aluminum foil lunch box body 16 and preventing the pressing plate 310 from pushing the aluminum foil lunch box body 16 to deviate during the fixing process.

[0068] At this time, the driving motor 12 is driven to make the driving motor 12 drive the turntable 13 to rotate, and the turntable 13 drives the installation groove 21 to rotate inside the chassis 31, and the installation groove 21 drives the placement plate 22 to rotate. Driven by the placement plate 22, the aluminum foil lunch box body 16 can be rotated to area b. At this time, the four pressing plates 310 move toward the aluminum foil lunch box body 16 and fit the surface of the aluminum foil lunch box body 16, so as to achieve the purpose of fixing and pressing the aluminum foil lunch box body 16, and prevent the aluminum foil lunch box body 16 from being blown up by air flow during the air tightness test. After the fixation is completed, it continues to rotate to area c, and the lifting push rod 14, the air injection pump 15 and the air tightness detection component 24 in area c cooperate to detect the aluminum foil lunch box body 16. After the detection is completed, it rotates to area d to release the clamping mechanism 30 from fixing the aluminum foil lunch box body 16.

[0069] In order to drive the pressing plate 310 to move, Fig.12 As shown, the pressing plate 310 is driven to move by a driving member 39, and the driving member 39 includes a rotating shaft 391 rotatably arranged on the lower tank body 32, and an eccentric wheel 393 is rotatably arranged on the surface of the rotating shaft 391, and the end of the eccentric wheel 393 is rotatably connected to a push rod 395 through a first shaft 394, and the end of the push rod 395 is rotatably connected to the pressing plate 310 through a second shaft 396;

[0070] A slider 397 is connected to the bottom end of the second shaft 396. A slide rail 398 parallel to the moving direction of the pressing plate 310 is provided on the lower tank 32. The slider 397 is slidably embedded in the slide rail 398. A through hole for the slide rail 398 to penetrate is provided on the surface of the pressing plate 310, so as to prevent the slide rail 398 from interfering with the normal movement of the pressing plate 310.

[0071] When the rotating shaft 391 starts to rotate, the rotating shaft 391 can push the push rod 395 through the eccentric wheel 393 and the first shaft rod 394, so that the push rod 395 pushes the slider 397 under the restriction of the second shaft rod 396. At the same time, the slider 397 can move horizontally along its length direction under the restriction of the slide rail 398, so that the second shaft rod 396 can only push the pressure plate 310 to move horizontally. The four pressure plates 310 can cooperate with each other to reinforce the aluminum foil lunch box body 16.

[0072] When the aluminum foil lunch box body 16 moves to area d, since the length of the push rod 395 close to the turntable 13 is shorter than that of the push rod 395 at other positions, the push rod 395 rotates with the rotating shaft 391 and pulls the pressure plate 310 to be removed from the aluminum foil lunch box body 16 faster than other pressure plates 310. At this time, since there is still air pressure inside the aluminum foil lunch box body 16, the aluminum foil lunch box body 16 at this position can be lifted up first to release the pressure, while the remaining three pressure plates 310 are still in a state of fixing the aluminum foil lunch box body 16, thereby preventing the aluminum foil lunch box body 16 from bouncing up due to the rapid release of air pressure. After the remaining three pressure plates 310 are released, the aluminum foil lunch box body 16 can be taken out from area d, and the detection of the aluminum foil lunch box body 16 is completed.

[0073] In order to enable the four pressing plates 310 to move simultaneously, Figure 7 and Fig. 9 As shown, guide grooves 35 are provided on the lower groove body 32 and the upper cover body 34, and a rotating ring 36 is rotatably embedded in the two guide grooves 35, and a plurality of second teeth 38 are equidistantly arranged around the inner surface of the rotating ring 36;

[0074] The rotating shaft 391 is equipped with gears 392, and the four gears 392 are meshed with the second teeth 38;

[0075] When the rotating ring 36 rotates under the restriction of the two guide grooves 35, the rotating ring 36 can drive the four gears 392 meshing with it to rotate, and drive the rotating shaft 391 to rotate through the gears 392 to push the pressing plate 310 to move;

[0076] Meanwhile, the inner wall of the chassis 31 is equipped with a first rack 311 and a second rack 312 at area b and area d respectively;

[0077] A plurality of first teeth 37 are equidistantly arranged around the outer surface of the rotating ring 36. The first teeth 37 mesh with the first rack 311 and the second rack 312 in sequence and rotate as the mounting groove 21 rotates.

[0078] When the rotating disk 13 drives the mounting groove 21 to move from area a to area b, the rotating ring 36 can drive the first tooth 37 to contact the first rack 311 first, and drive the rotating ring 36 to rotate under the drive of the first rack 311. At this time, the rotating ring 36 can drive the gear 392 to rotate through the second tooth 38, so that the four pressing plates 310 can move inward to fix the aluminum foil lunch box body 16;

[0079] When the turntable 13 drives the mounting groove 21 to move from area c to area d, the rotating ring 36 can drive the first tooth 37 to contact the second rack 312. At this time, the gear 392 continues to rotate driven by the second rack 312, so that the four pressure plates 310 can move outward to release the fixation of the aluminum foil lunch box body 16.

[0080] like Fig.12 and Fig.13 As shown, in order to avoid the problem that the edge of the aluminum foil lunch box body 16 is deformed due to extrusion by contacting the pressing plate 310 with the edge of the aluminum foil lunch box body 16 during the horizontal movement, the placement plate 22 drives the aluminum foil lunch box body 16 to move up and down through the pressing mechanism 40. The pressing mechanism 40 includes an extension plate 41 arranged at the outer edge of the placement plate 22 and an adjustment cavity 43 opened on the inner wall of the lower trough body 32, and the extension plate 41 is inserted into the adjustment cavity 43;

[0081] At least two telescopic rods 47 are disposed at the bottom of the placement plate 22, and the telescopic rods 47 penetrate the telescopic grooves 45 disposed on the inner wall of the lower tank body 32, and a spring 46 is disposed between the telescopic rods 47 and the telescopic grooves 45;

[0082] Two grooves 42 are formed on the extension plate 41, and a push block 44 is provided at the bottom of the slider 397. The push block 44 passes through the lower groove body 32 and is inserted into the adjustment cavity 43. The bottom end of the push block 44 is in contact with the surface of the extension plate 41 and can be embedded in the groove 42. The contact surfaces of the push block 44 and the groove 42 are both arranged in an inclined shape.

[0083] Under the push of the push rod 395, the second shaft rod 396 can drive the slider 397 to slide in the slide rail 398. During the sliding process, the slider 397 drives the push block 44 to slide out of the groove 42 and squeeze the extension plate 41, so that the extension plate 41 drives the placement plate 22 to move downward and drives the telescopic rod 47 to move inside the telescopic groove 45. The telescopic rod 47 cooperates with the telescopic groove 45 to squeeze the spring 46 to produce elastic deformation. As the push block 44 continues to move, the push block 44 is embedded in the next groove 42. At this time, the telescopic rod 47 drives the placement plate 22 to lift under the push of the elastic deformation recovery of the push block 44, thereby completing the action of the placement plate 22 first driving the aluminum foil lunch box body 16 to descend to avoid the horizontally moving pressure plate 310, and then lifting it to fit the bottom of the pressure plate 310 moved to the specified position, thereby avoiding the contact between the aluminum foil lunch box body 16 and the pressure plate 310 causing extrusion deformation.

[0084] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes to the aluminum foil lunch box air tightness detection device and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An aluminum foil lunch box air tightness detection device, comprising a base (11) and an aluminum foil lunch box body (16), wherein a driving motor (12), a lifting push rod (14) and an air injection pump (15) are sequentially mounted on the base (11), a rotating disk (13) is mounted on the output end of the driving motor (12), the lifting push rod (14) and the air injection pump (15) have the same axial position and when the lifting push rod (14) descends, the air injection pump (15) is driven to rise synchronously, characterized in that: The turntable (13) is equipped with four detection mechanisms (20), the detection mechanisms (20) comprising four mounting grooves (21) connected to the turntable (13), and a placement plate (22) is installed on the mounting grooves (21), and an aluminum foil lunch box body (16) is placed on the placement plate (22); The installation groove (21) and the placement plate (22) are both provided with through holes in the middle, and an air intake valve (23) is installed in the through hole provided in the placement plate (22). The air intake valve (23) can be inserted into the through hole provided in the installation groove (21), and the air injection pump (15) can be inserted into the air intake valve (23) to inject air into the interior of the aluminum foil lunch box body (16); The lifting push rod (14) is equipped with an airtight detection member (24), the airtight detection member (24) comprising an airtight film (242) covering the aluminum foil lunch box body (16), and the gas leaking from the aluminum foil lunch box body (16) causes the airtight film (242) to swell; The airtight detection member (24) further comprises an outer shell (243) connected to the lifting push rod (14) and an inner shell (241) connected to the outer shell (243); the inner shell (241) is attached to the surface of the aluminum foil lunch box body (16); a plurality of through holes are provided on the surfaces of the inner shell (241) and the outer shell (243); an airtight film (242) is provided between the inner shell (241) and the outer shell (243); and the airtight film (242) can bulge out from the through holes; The aluminum foil lunch box body (16) is fixed on the placement plate (22) via a clamping mechanism (30), wherein the clamping mechanism (30) comprises a chassis (31) mounted on the base (11), the turntable (13) passes through the middle of the chassis (31), and the four mounting grooves (21) are all located inside the chassis (31); The clamping mechanism (30) further comprises a lower tank body (32) arranged inside the mounting tank (21), an upper cover body (34), and a plurality of support members (33) connecting the lower tank body (32) and the upper cover body (34); the lower tank body (32) and the upper cover body (34) form a chamber; four movable pressing plates (310) are arranged inside the chamber; the four pressing plates (310) are assembled to form a ring that fits the outer wall of the aluminum foil lunch box body (16).

2. The air tightness detection device for aluminum foil lunch box according to claim 1 is characterized in that: The mounting groove (21) divides the interior of the chassis (31) into areas a, b, c and d; The aluminum foil lunch box body (16) is placed in area a, rotated to area b and fixed by a clamping mechanism (30), and then rotated to area c. The lifting push rod (14), the air injection pump (15) and the airtightness detection component (24) in area c are tested. After the test is completed, the aluminum foil lunch box body (16) is rotated to area d to release the clamping mechanism (30) from fixing the aluminum foil lunch box body (16).

3. The air tightness detection device for aluminum foil lunch box according to claim 1, characterized in that: The pressing plate (310) is driven to move by a driving member (39), wherein the driving member (39) comprises a rotating shaft (391) rotatably arranged on the lower tank body (32), and an eccentric wheel (393) is rotatably arranged on the surface of the rotating shaft (391), and the end of the eccentric wheel (393) is rotatably connected to a push rod (395) via a first shaft (394), and the end of the push rod (395) is rotatably connected to the pressing plate (310) via a second shaft (396); A slider (397) is connected to the bottom end of the second shaft rod (396), and a slide rail (398) parallel to the moving direction of the pressure plate (310) is provided on the lower trough body (32), and the slider (397) is slidably embedded in the slide rail (398).

4. The air tightness detection device for aluminum foil lunch box according to claim 3 is characterized in that: The push rod (395) near the rotating disk (13) is shorter than the push rods (395) at other positions, and the push rod (395) rotates with the rotating shaft (391) and pulls the pressing plate (310) to be removed from the aluminum foil lunch box body (16) faster than other pressing plates (310).

5. The air tightness detection device for aluminum foil lunch box according to claim 4, characterized in that: The surface of the pressing plate (310) is provided with a through hole for the slide rail (398) to pass through.

6. The air tightness detection device for aluminum foil lunch box according to claim 3, characterized in that: The lower trough body (32) and the upper cover body (34) are provided with guide grooves (35), a rotating ring (36) is rotatably embedded inside the two guide grooves (35), and a plurality of second teeth (38) are equidistantly arranged around the inner surface of the rotating ring (36); The rotating shaft (391) is equipped with gears (392), and the four gears (392) are meshed with the second teeth (38).

7. The air tightness detection device for aluminum foil lunch box according to claim 6, characterized in that: The inner wall of the chassis (31) is respectively equipped with a first rack (311) and a second rack (312) at area b and area d; The outer surface of the rotating ring (36) is equidistantly provided with a plurality of first teeth (37) surrounding it. The first teeth (37) mesh with and rotate with the first rack (311) and the second rack (312) in sequence as the mounting groove (21) rotates.

8. The air tightness detection device for aluminum foil lunch box according to claim 2, characterized in that: The placement plate (22) drives the aluminum foil lunch box body (16) to move up and down through a pressing mechanism (40), the pressing mechanism (40) comprising an extension plate (41) arranged at the outer edge of the placement plate (22) and an adjustment cavity (43) opened on the inner wall of the lower trough body (32), the extension plate (41) being inserted into the adjustment cavity (43); The bottom end of the placement plate (22) is provided with no less than two telescopic rods (47), and the telescopic rods (47) penetrate through telescopic grooves (45) provided on the inner wall of the lower tank body (32), and a spring (46) is provided between the telescopic rods (47) and the telescopic grooves (45); The extension plate (41) is provided with two grooves (42), and a push block (44) is provided at the bottom of the slider (397). The push block (44) passes through the lower groove body (32) and is inserted into the adjustment cavity (43). The bottom end of the push block (44) is in contact with the surface of the extension plate (41) and can be embedded in the groove (42). The contact surfaces of the push block (44) and the groove (42) are both arranged to be inclined.

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