Leakage-proof detection device for thermal shrinkage protective film

Abstract

The utility model belongs to the technical field of food packaging, and discloses a thermal shrinkage protective film leakage-proof detection device which comprises a machine body, electric push rods are installed on the inner walls of the two sides of the machine body, the output ends of the electric push rods are fixedly connected with clamping blocks, and two connecting shafts are arranged above the clamping blocks. First gears are fixedly connected to the surfaces of the two connecting shafts, the same rack is connected to the surfaces of the two first gears in a meshed mode, the rack is slidably connected to the top end of the interior of the machine body, an air inlet pipe is fixedly connected to the interior of one first gear, and an air pump is connected to the outer surface of the air inlet pipe through a hose; the protective film is driven by the two clamping blocks to be tightly attached to the surface of the air inlet pipe, so that the process that the air pump extracts air through the air inlet pipe is more stable, the problem that the air extraction effect of the air pump is reduced when the protective film is not tightly attached to the outer surface of the air inlet pipe is solved, and the efficiency of detecting the quality of the protective film is improved.

Description

Technical Field

[0001] This utility model belongs to the field of food packaging technology, and in particular relates to a leak detection device for heat-shrinkable protective film. Background Technology

[0002] With the rapid development of the food packaging industry, the requirements for food storage environment are getting higher and higher. Existing heat shrink protective film leak detection devices use the principle of heat shrinkage to make the protective film completely adhere to the surface of the food packaging box, thus completing the sealing process.

[0003] However, traditional heat-shrinkable protective films cannot be used during the sealing process. Since the protective film is made of plastic, it is relatively easy to break. As a result, the broken protective film cannot effectively seal and protect the product, thus affecting the dustproof, moisture-proof and protective effects of the packaging box. Utility Model Content

[0004] This utility model addresses the problem that existing technologies cannot use damaged protective films, which are made of plastic and are prone to breakage. This results in the damaged protective film failing to effectively seal and protect the product, thus affecting the dustproof, moisture-proof, and protective effects of the packaging box. The following technical solution is proposed:

[0005] A heat-shrinkable protective film leak-proof detection device includes a body. Chains are rotatably connected to the bottom of the inner walls on both sides of the body. Electric push rods are installed on the inner walls on both sides of the body. Clamping blocks are fixedly connected to the output ends of the electric push rods. Two connecting shafts are arranged above the clamping blocks. Both connecting shafts are rotatably connected to the inside of the body. Gears are fixedly connected to the surfaces of the two connecting shafts. The same rack is meshed on the surfaces of the two gears. The rack is slidably connected to the top of the inside of the body. An air inlet pipe is fixedly connected inside one of the gears. A hose is embedded in the outer surface of the air inlet pipe. An air pump is installed at the other end of the hose. The air pump is fixedly connected to one side of the body. A limit block is fixedly connected to the other gear.

[0006] As a preferred embodiment of the above technical solution, the surface of the clamping block is provided with a groove, and the inner wall of the groove is in contact with the outer surface of the air intake pipe.

[0007] As a preferred embodiment of the above technical solution, multiple rollers are rotatably connected to the outer side of the chain, and multiple gears are meshed with the inner side of the chain. The gears are rotatably connected inside the machine body, and the same cleaning roller is fixedly connected to one end face of two horizontally adjacent gears.

[0008] As a preferred embodiment of the above technical solution, two outer shells are fixedly connected to the bottom of the machine body, and the two outer shells are respectively located below the two cleaning rollers, and a collection box is slidably connected to the outer shell.

[0009] As a preferred embodiment of the above technical solution, each of the inner walls on both sides of the single outer shell is provided with a sliding groove, and a slider is slidably connected inside the sliding groove, and the slider is fixedly connected to both sides of the collection box.

[0010] As a preferred embodiment of the above technical solution, the number of cleaning rollers is set to two, one of which is located at the feed end of the machine body and the other is located at the discharge end of the machine body.

[0011] The beneficial effects of this utility model are as follows:

[0012] (1) By using two clamping blocks to make the protective film tightly adhere to the surface of the air inlet pipe, the process of the air pump drawing air through the air inlet pipe is more stable, thereby avoiding the problem that the air pump's drawing effect is reduced when the protective film is not tightly adhered to the outer surface of the air inlet pipe, thus improving the efficiency of testing the quality of the protective film.

[0013] (2) The residue on the surface of the roller is cleaned by the cleaning roller, which avoids the excess protective film adsorbing on the surface of the roller, so that the residual protective film will affect the subsequent processing or use effect, thereby improving the quality and efficiency of the heat shrink protective film of the device. Attached Figure Description

[0014] Figure 1 The diagram shown is a structural schematic of a heat-shrinkable protective film leak detection device according to Embodiment 1;

[0015] Figure 2 The diagram shown is a schematic diagram of the internal structure of a heat-shrinkable protective film leak detection device in Embodiment 1;

[0016] Figure 3 The diagram shown is a structural schematic of the roller in Embodiment 1;

[0017] Figure 4 The diagram shown is a structural schematic of the cleaning roller in Example 1;

[0018] Figure 5 The diagram shown is a structural schematic of the collection box in Example 1.

[0019] In the diagram: 1. Body; 2. Chain; 3. Electric push rod; 4. Clamping block; 5. Connecting shaft; 6. Gear 1; 7. Rack; 8. Air inlet pipe; 9. Air pump; 10. Limiting block; 11. Roller; 12. Gear 2; 13. Cleaning roller; 14. Outer shell; 15. Collection box; 16. Slider. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0021] Example 1: This utility model provides a leak-proof detection device for heat-shrinkable protective film, such as... Figures 1 to 5 As shown, the device includes a body 1. Chains 2 are rotatably connected to the bottom of the inner walls on both sides of the body 1. Electric push rods 3 are installed on the inner walls of both sides of the body 1. Clamping blocks 4 are fixedly connected to the output ends of the electric push rods 3. Two connecting shafts 5 are positioned above the clamping blocks 4. Both connecting shafts 5 are rotatably connected to the inside of the body 1. Gears 6 are fixedly connected to the surfaces of both connecting shafts 5. The same rack 7 is meshed with the surfaces of the two gears 6. The rack 7 is slidably connected to the top of the inside of the body 1. An air intake pipe 8 is fixedly connected inside one of the gears 6. A flexible hose is embedded in the outer surface of the air intake pipe 8. An air pump 9 is installed at the other end of the flexible hose and is fixedly connected to the body 1. On the side, another gear 6 is fixedly connected to a limiting block 10. The number of teeth of the gear 6 with the limiting block 10 is greater than the number of teeth of the gear 6 with the air inlet pipe 8. The weight of the limiting block 10 is greater than the weight of the air inlet pipe 8. A pressure gauge is installed on the surface of the air pump 9. An existing heat shrink protective film leak detection device also includes heating equipment and a motor. In use, the motor drives the chain 2 and the roller 11 to rotate along a specific trajectory and transport the product. After the product enters the machine body 1 and is detected, the heating equipment heats the protective film on the outside of the product so that it is completely attached to the surface of the product, thereby completing the product packaging process.

[0022] like Figure 2 and Figure 5 As shown, the clamping block 4 has a groove on its surface, and the inner wall of the groove is in contact with the outer surface of the air inlet pipe 8. A rubber pad is attached to the surface of the clamping block 4. The two clamping blocks 4 drive the rubber pad to squeeze the protective film and the air inlet pipe 8, so that the opening of the squeezed protective film is sealed, which improves the sealing effect of the protective film. In turn, when the air pump 9 draws air from the inside of the protective film, the leakage of airflow is reduced, thereby improving the sealing efficiency and stability.

[0023] like Figures 1 to 3 As shown, multiple rollers 11 are rotatably connected to the outer side of the chain 2, and multiple gears 12 are meshed and connected to the inner side of the chain 2. The gears 12 are rotatably connected to the inside of the machine body 1. The end faces of two adjacent gears 16 in the horizontal direction are fixedly connected to the same cleaning roller 13. The cleaning roller 13 cleans the surface of the roller 11, preventing impurities remaining on the surface of the roller 11 from adhering to the surface of the protective film. Otherwise, the adhering of impurities will affect the flatness and transparency of the protective film, making the surface of the protective film rough and opaque, thereby reducing the functional effect of the protective film.

[0024] like Figure 2 and Figure 4 As shown, two outer shells 14 are fixedly connected to the bottom of the machine body 1. The two outer shells 14 are located below the two cleaning rollers 13 respectively. The outer shells 14 are slidably connected to the collection box 15. The cleaning rollers 13 clean the rollers 11 at the same time. At this time, the impurities on the surface of the rollers 11 will fall into the collection box 15, avoiding the problem of impurities falling to the ground when cleaning the rollers 11, thereby improving the cleanliness of the equipment and saving the time that workers need to clean around the device.

[0025] like Figure 5 As shown, each of the inner walls on both sides of the single outer shell 14 is provided with a sliding groove, and a slider 16 is slidably connected inside the sliding groove. The slider 16 is fixedly connected to both sides of the collection box 15. When the collection box 15 is taken out from inside the outer shell 14, the collection box 15 drives the slider 16 to move. When the slider 16 moves, it slides inside the sliding groove. Under the limitation of the sliding groove, the process of taking out the collection box 15 is more stable, thereby avoiding the problem of displacement when taking out the collection box 15, thus improving the stability when taking out the collection box 15.

[0026] like Figure 3 As shown, there are two cleaning rollers 13. One cleaning roller 13 is located at the feed end of the machine body 1, and the other cleaning roller 13 is located at the discharge end of the machine body 1. The cleaning roller 13 located below the discharge end is made of stainless steel wire, and the cleaning roller 13 located below the feed end is made of carbon fiber. The stainless steel wire cleaning roller 13 pre-treats the surface of the roller 11 to prevent residual protective film from adhering to the surface of the roller 11. Then, the carbon fiber cleaning roller 13 removes static electricity from the surface of the roller 11 to prevent excess protective film from adsorbing onto the surface of the roller 11. This would prevent residual protective film from affecting subsequent processing or use, thereby improving the quality and efficiency of the heat shrink protective film of the device.

[0027] Working Principle: When using this device, the operator places the product inside the protective film and adjusts the film so that the opening is open. The product is then placed on the surface of roller 11. The motor is then started, driving chain 2 and roller 11 to rotate along a preset trajectory. This rotation of roller 11 moves the top of the product feed end towards the inside of the machine body 1. When the product moves to contact with the limiting block 10, it causes the limiting block 10 to rotate. One gear 6 of the limiting block 10 rotates, driving rack 7 to slide. Rack 7 then drives the other gear 6 to rotate, which in turn drives the air inlet pipe 8 to rotate. The air inlet pipe 8 stops rotating when it rotates from a horizontal direction to a vertical direction. At this point, one end of the rotated air inlet pipe 8 contacts one end of the product. The operator then starts the electric push rod 3, which moves the clamping block 4. The clamping block 4 then... The protective film converges towards the air inlet pipe 8 and adheres to the outer surface of the air inlet pipe 8. At this time, the operator starts the air pump 9 to extract the remaining air after the protective film comes into contact with the air inlet pipe 8. The pressure gauge is used to observe the air pump 9's suction value to test the quality of the protective film. Products that pass the test continue to move. When the top of the product stops contacting the limit block 10, the limit block 10 rotates in the opposite direction and reverses the above steps, so that the air inlet pipe 8 changes from a horizontal state to a vertical state. This prevents subsequent products from blocking the product when entering the machine body 1. The two clamping blocks 4 drive the protective film to adhere tightly to the surface of the air inlet pipe 8, making the process of the air pump 9 sucking air through the air inlet pipe 8 more stable. This avoids the problem of reduced suction effect of the air pump 9 when the protective film is not tightly adhered to the outer surface of the air inlet pipe 8, thereby improving the efficiency of testing the quality of the protective film.

[0028] When chain 2 rotates, it drives multiple gears 12 to rotate synchronously. Gears 12 drive connecting shaft 5 to rotate, and connecting shaft 5 drives cleaning roller 13 to rotate. One cleaning roller 13 cleans the residue on the surface of roller 11, while the other cleaning roller 13 removes static electricity from the surface of roller 11. The impurities on the surface of roller 11 after cleaning will fall into the collection box 15, avoiding the problem of impurities falling to the ground after cleaning roller 11. This improves the cleanliness of the equipment and saves the time that workers need to spend cleaning around the device.

[0029] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A leak detection apparatus for heat shrink protective film, characterized by, The machine includes a body (1), with chains (2) rotatably connected to the bottom of the inner walls on both sides of the body (1). Electric push rods (3) are installed on both sides of the inner walls of the body (1). A clamping block (4) is fixedly connected to the output end of the electric push rod (3). Two connecting shafts (5) are provided above the clamping block (4). The two connecting shafts (5) are rotatably connected to the inside of the body (1). Gears (6) are fixedly connected to the surfaces of the two connecting shafts (5). The same rack (7) is meshed on the surfaces of the two gears (6). The rack (7) is slidably connected to the top of the inside of the body (1). An air inlet pipe (8) is fixedly connected inside one of the gears (6). A hose is embedded in the outer surface of the air inlet pipe (8). An air pump (9) is installed at the other end of the hose. The air pump (9) is fixedly connected to one side of the body (1). A limit block (10) is fixedly connected to the other gear (6).

2. The heat shrink protective film leak detection apparatus of claim 1, wherein, The clamping block (4) has a groove on its surface, and the inner wall of the groove is in contact with the outer surface of the air intake pipe (8).

3. The heat shrink protective film leak detection apparatus of claim 1, wherein, Multiple rollers (11) are rotatably connected to the outer side of the chain (2), and multiple gears (12) are meshed on the inner side of the chain (2). The gears (12) are rotatably connected to the inside of the machine body (1), and the end faces of two adjacent gears (6) in the horizontal direction are fixedly connected to the same cleaning roller (13).

4. The heat shrink protective film leak detection apparatus of claim 1, wherein, The bottom of the machine body (1) is fixedly connected to two outer shells (14), and the two outer shells (14) are located below the two cleaning rollers (13), and the outer shells (14) are slidably connected to a collection box (15).

5. The heat shrink protective film leak detection apparatus of claim 4, wherein, Each of the outer shells (14) has a groove on both sides of its inner wall, and a slider (16) is slidably connected inside the groove. The slider (16) is fixedly connected to both sides of the collection box (15).

6. The heat shrink protective film leak detection apparatus of claim 3, wherein, The number of cleaning rollers (13) is set to two, one of which is located at the feed end of the machine body (1) and the other is located at the discharge end of the machine body (1).

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