Food packaging bag sealing mechanism, packaging equipment and method

Abstract

The present invention belongs to the technical field of packaging equipment, and discloses a food packaging bag sealing mechanism, packaging equipment and method, including a support frame, wherein two symmetrically distributed clamping plates are connected to the support frame for sliding left and right inside, a double-headed screw is rotatably connected inside the support frame, the two clamping plates and the double-headed screw are threadedly connected, the double-headed screw is coaxially fixedly connected with a driving gear, the driving gear is externally connected to a driving source, and the two clamping plates are driven to slide in opposite directions by the double-headed screw, and the clamping plates are both connected with clamping structures, the two clamping structures are symmetrically distributed, and the food packaging bags are limitedly clamped by the clamping structures, and sealing rails are provided on the clamping plates, and a heat-sealing mechanism is passed through the sealing rails, and the heat-sealing mechanism realizes the sealing process of the food packaging bag in the process of passing through the sealing rails, and a vacuum extraction mechanism is arranged inside the support frame, and the vacuum extraction mechanism is arranged above the clamping structure, and the vacuum extraction mechanism realizes the vacuum treatment of the food packaging bag; and the invention has strong practicality.

Description

Technical Field

[0001] The invention relates to the technical field of packaging equipment, and in particular to a food packaging bag sealing mechanism, packaging equipment and method. Background Art

[0002] With the improvement of food safety awareness and consumers' pursuit of food quality, the market has put forward higher requirements on the sealing quality and efficiency of food packaging bags. Traditional sealing structures and methods often have problems such as loose sealing and easy leakage, which seriously affect the shelf life of food and consumers' willingness to buy. Therefore, the development of an efficient, stable and safe sealing structure, packaging equipment and method for food packaging bags has become an urgent need for food companies. Therefore, how to achieve efficient and stable sealing of food packaging bags is particularly important.

[0003] A Chinese patent with application number CN202410781849.0 discloses an environmentally friendly plastic packaging bag hot pressing forming device. The above patent, through the setting of guide parts and transverse sealing mechanisms, does not require users to fold the two sides of the plastic paper, thereby avoiding the problem that three layers of plastic are hot pressed into one and cannot form a cylindrical structure. At the same time, through the setting of a cooling mechanism, the hot pressed part can be cooled to accelerate the forming of the hot pressed part, while improving production efficiency. At the same time, the unqualified rate of packaging bags is reduced, especially when filling liquid products, the hot pressed part can be pre-cooled to avoid cracking of the hot pressed part due to the low temperature of the filling liquid.

[0004] The Chinese patent application number CN202321920857.6 discloses a bagged food sealing machine and its sealing structure. The present application provides a sealing mechanism to manually seal the bagged food to be sealed, and then inserts one end of the seal between the upper conveying component and the lower conveying component, and then controls the upper conveying component and the lower conveying component to start by controlling the control row of keys, and drives the bagged food to move under the action of the upper conveying component and the lower conveying component. At this time, the heating wire can be controlled to work by the control row of keys, and heated under the action of the heating wire, so that the heat is conducted to the surface of the food bag through the supporting mesh plate, and the food bag is sealed by high-temperature melting with the cooperation of the pressing plate, so as to realize the rapid sealing function of the sealing machine, thereby improving the working efficiency of the sealing machine when in use; by providing a supporting mechanism, the food bag is supported under the action of the bracket to avoid In order to avoid the situation where there is a lot of food in the food bag, under the action of gravity, the food sealing part is easily stressed and wrinkled. At the same time, the height of the bracket can be adjusted according to the size of the food bag. First, loosen the screw on the surface of the telescopic rod, and then rotate the adjusting screw to make the adjusting screw drive the bracket to move up or down, and guide the bracket under the action of the telescopic rod to realize the support function of the sealing machine for the food bag, so that the sealing machine is not easily affected by the gravity of the food bag itself. The maintenance mechanism is set up. If the heating wire needs to be inspected, the fastening bolts can be loosened, and then the heating frame can be pulled to make the heating frame drive the slide bar to slide along the slide frame, and the heating frame can be pulled out. The staff can inspect or replace the heating wire separately to realize the function of the sealing machine to facilitate the inspection or replacement of the heating wire, thereby improving the convenience of using the sealing machine. However, in actual applications, the following problems still exist, specifically:

[0005] 1. Although the existing sealing equipment solves the wrinkles caused by gravity, the wrinkles in the packaging bag itself cannot be effectively unfolded during the sealing process, resulting in poor sealing effect and even air leakage;

[0006] 2. In the process of vacuuming the packaging bag, there will be problems such as incomplete extraction and even the vacuum end cannot effectively extend into the packaging bag;

[0007] 3. Most of the existing equipment uses manual sealing operations one by one, which is not convenient for assembly line production, has low production efficiency, is not convenient for mass production, has high labor intensity, and is not convenient for realizing flow-type sealing of multiple food packaging bags.

[0008] Therefore, the present invention provides a food packaging bag sealing mechanism, packaging equipment and method to solve the above problems. Summary of the invention

[0009] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a food packaging bag sealing mechanism, packaging equipment and method, which effectively solves the problems of wrinkles at the sealing point, incomplete vacuuming, gas reflux during the heat sealing process and inability to achieve assembly line operation.

[0010] The present invention comprises a support frame, wherein two symmetrically distributed clamping plates are connected to the support frame for sliding left and right, a double-headed screw is connected to the support frame for rotation, the two clamping plates are threadedly connected to the double-headed screw, the double-headed screw is coaxially fixedly connected to a driving gear, the driving gear is externally connected to a driving source, and the two clamping plates are driven to slide in opposite directions through the double-headed screw;

[0011] The clamping plates are all connected with a clamping structure, and the two clamping structures are symmetrically distributed, and the food packaging bag is clamped in a limited position by the clamping structure;

[0012] The clamping plates are provided with sealing rails, and the sealing rails are penetrated by heat sealing mechanisms, and the heat sealing mechanisms seal the food packaging bags in the process of penetrating the sealing rails;

[0013] A vacuum extraction mechanism is disposed inside the support frame, and the vacuum extraction mechanism is disposed above the clamping structure, and vacuum extraction treatment of the food packaging bag is achieved through the vacuum extraction mechanism;

[0014] The clamping structure includes two groups of rotating rollers distributed up and down, the two groups of rotating rollers are rotatably connected to the clamping plate, the outer walls of the rotating rollers are covered with elastic sleeves, the two groups of rotating rollers are distributed up and down, and the food packaging bag is clamped by the reverse sliding of the rotating rollers. The interiors of the two upper rotating rollers are hollow structures, and air holes are opened on the rotating rollers. The rotating rollers are connected to an external exhaust device, and the air holes are placed in a negative pressure state through the external exhaust device, so that the food packaging bag can be attached to the rotating rollers, which is convenient for vacuuming the food packaging bag.

[0015] Preferably, the heat sealing mechanism is located between the two groups of rotating rollers distributed up and down, and the heat sealing mechanism includes two symmetrically distributed heat pressing frames, which are telescopically slidable synchronously, and the heat pressing frames penetrate the sealing rails to achieve pressurized heat sealing of the food packaging bag.

[0016] Preferably, the two groups of rotating rollers located on the same clamping plate rotate in opposite directions, and the food packaging bag is flattened by the rotation of the rotating rollers. The two rotating rollers on the lower side are coaxially fixedly connected with rotating gears, and a transfer gear is meshed next to the rotating gear. The transfer gear is rotatably connected to the clamping plate on the same side, and the transfer gear on the same clamping plate is connected to the rotating roller on the upper side through a sprocket transmission mechanism. When the two rotating rollers on the lower side rotate in opposite directions, the two rotating rollers on the upper side are driven to rotate in opposite directions. The two groups of rotating rollers on the same clamping plate rotate in opposite directions.

[0017] The two rotating rollers on the lower side are provided with sliding holes, and spiral tracks are provided inside the sliding holes. The two spiral tracks rotate in opposite directions. Sliding rods are coaxially slidably connected inside the sliding holes. A sliding pin that matches the spiral track is fixedly connected to the sliding rod. The sliding rod is slidably connected to a sliding shaft slidably connected to the support frame. The sliding process of the sliding shaft causes the sliding rod to slide synchronously, thereby causing the rotating roller to rotate.

[0018] Preferably, the vacuum extraction mechanism comprises an air extraction pipe, an annular groove matching with the air extraction pipe is provided on the two upper rotating rollers, so that the air extraction pipe can pass through the rotating rollers, a fixed air inlet cylinder is coaxially sleeved on the outside of the air extraction pipe, the air extraction pipe and the fixed air inlet cylinder are connected by a spring, a pressing rod is fixedly connected to the upper end of the air extraction pipe, the pressing rod is connected to an external pressing device, and the air extraction pipe is extended and retracted by pressing the pressing rod, thereby placing the retractable pipe inside the food packaging bag;

[0019] The air extraction pipe is connected to an external exhaust device.

[0020] A packaging device for food packaging bags, using the above-mentioned food packaging bag sealing mechanism, also includes a base frame, the base frame is fixedly connected to a vertical plate frame, the left and right sides of the vertical plate frame are rotatably connected to conveying sprockets, the conveying sprockets are connected to an intermittent driving device arranged on the upper end of the vertical plate frame, a conveying chain is wound between the two conveying sprockets, the conveying chains are fixedly connected to a plurality of support columns distributed at equal intervals, the support columns and the conveying chains rotate synchronously, the support columns are fixedly connected to the food packaging bag sealing mechanism, and the support frame is fixedly connected to the support columns;

[0021] The left and right end surfaces of the base frame are both provided with arc-shaped limit plates, the pressing rod is in contact with the arc-shaped limit plates, and the pressing rod slides up and down under the action of the arc-shaped limit plates to adjust the position of the exhaust pipe;

[0022] The heat sealing mechanism is placed inside the base frame, and heat seals the food packaging bags one by one during the intermittent sliding process of the support frame.

[0023] Preferably, a storage frame is fixedly connected to the left end of the base frame, a lifting frame is slidably connected to the inside of the storage frame, a plurality of guide rollers are rotatably connected to the lifting frame, the lifting frame is connected to a hydraulic lifting device placed inside the base frame, two symmetrically distributed arc guide plates are slidably connected to the upper end of the lifting frame, a double-headed adjusting screw rod threadedly connected to the arc guide plate is rotatably connected to the inside of the lifting frame, an adjusting gear is coaxially fixedly connected to the double-headed adjusting screw rod, and a limit rack meshing with the adjusting gear is fixedly connected to the front side of the storage frame;

[0024] Four rectangularly distributed infrared transmitters are fixedly connected to the upper end of the lifting frame, an infrared receiver matched with the infrared transmitter is connected to the support frame, and the infrared receiver is connected to a control module placed on the base frame.

[0025] Preferably, a clamping rack is fixedly connected to the left side of the base frame, and during the sliding process of the support frame, the driving gear is rotated by limiting the position of the clamping rack, and the two clamping plates are in a clamping state;

[0026] An unlocking rack is fixedly connected to the right side of the base frame. During the sliding process of the support frame, the driving gear is caused to rotate in the opposite direction by limiting the position of the unlocking rack, and the two clamping plates are in an open state;

[0027] Preferably, the sliding shaft is fixedly connected to a sliding rack that is slidably connected to the base frame left and right on the side away from the vertical plate frame, the sliding rack is meshed with sliding gears on the upper and lower sides, and the two sliding gears rotate in opposite directions. The sliding gear is connected to the clamping plate through a telescopic rod, and an adjusting rack is connected to the right side of the clamping rack inside the base frame. During the sliding process of the support frame, under the limiting action of the adjusting rack, the sliding gear rotates to make the sliding rack slide;

[0028] A reset rack is connected to the left side of the unlocking rack inside the base frame. During the sliding process of the support frame, under the limiting effect of the reset rack, the sliding gear rotates to reset the sliding rack.

[0029] A method for using a packaging device for a food packaging bag comprises the following steps:

[0030] Step 1: starting the driving source of the conveying sprocket, so that the conveying sprocket can rotate intermittently, causing the support frame to rotate intermittently;

[0031] Step 2: placing the food packaging bag on the lifting frame, when one of the support frames corresponds to the lifting frame, the hydraulic lifting device is started, the lifting frame rises, and the food packaging bag is placed inside the support frame;

[0032] Step 3: When the support frame drives the food packaging bag to slide, the food packaging bag is clamped by rotating the roller;

[0033] Step 4: After the clamping is completed, the food packaging bag is flattened by rotating the rotating roller;

[0034] Step 5: After the food packaging bag is flattened, the food packaging bag is vacuumized by the vacuum extraction mechanism;

[0035] Step 6: Then, during the sliding process of the food packaging bag, the food packaging bag is sealed by the heat sealing mechanism;

[0036] Step 7: The contact limiting clamping process of the food packaging bag is realized by the rotational resetting of the rotating rollers and the mutual separation of the rotating rollers, thereby realizing the entire sealing operation.

[0037] The present invention improves the existing packaging equipment and has the following beneficial effects:

[0038] 1. By setting the clamping structure, sealing rail, heat sealing mechanism, air vents, vacuum extraction mechanism and exhaust device, the problem of clamping and limiting the food packaging bag and facilitating continuous exhaust treatment during the heat sealing process of the food packaging bag to avoid air flow backflow is effectively solved;

[0039] 2. The problem of smoothing the sealing part of the food packaging bag by rotating the rotating roller is achieved by setting structures such as a rotating roller, a rotating gear, a transfer gear, a sliding hole, a sliding rod and a sliding shaft;

[0040] 3. By setting up structures such as fixed air inlet cylinder, pressing rod and air extraction pipe, the problem of ensuring that the food packaging bag is always in a vacuum state during the heat sealing process and avoiding air flow backflow is effectively solved;

[0041] 4. The problem of loading food packaging bags and adjusting the loading position of food packaging bags at the same time is effectively solved by setting structures such as a lifting frame, an arc guide plate, a double-headed adjusting screw rod, an adjusting gear and a limiting rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0043] Figure 2Schematic diagram of the sealing mechanism of the food packaging bag of the present invention Figure 1 .

[0044] Figure 3 Schematic diagram of the sealing mechanism of the food packaging bag of the present invention Figure 2 .

[0045] Figure 4 It is a cross-sectional schematic diagram of the sealing mechanism of the food packaging bag of the present invention.

[0046] Figure 5 It is a cross-sectional view of the vacuum extraction mechanism of the present invention.

[0047] Figure 6 It is a schematic diagram of the air vent and the annular groove of the present invention.

[0048] Figure 7 For the present invention Figure 1 A partial enlarged schematic diagram in the middle.

[0049] Figure 8 It is the front view of the present invention.

[0050] Fig. 9 For the present invention Figure 8 A partial enlarged schematic diagram of point C in the middle.

[0051] Fig.10 For the present invention Figure 8 A partial enlarged schematic diagram of point D in the middle.

[0052] Fig.11 It is a schematic diagram of the lifting frame and its connecting parts of the present invention.

[0053] Fig.12 For the present invention Figure 8 A partial enlarged schematic diagram of point B in the middle.

[0054] Fig.13 It is a schematic diagram of the base frame and its connecting parts of the present invention.

[0055] Figure numerals: 1, support frame; 2, clamping plate; 3, double-headed screw; 4, driving gear; 5, sealing rail; 6, rotating roller; 7, elastic sleeve; 8, air vent; 9, rotating gear; 10, transfer gear; 11, sliding hole; 12, spiral track; 13, sliding rod; 14, exhaust pipe; 15, annular groove; 16, fixed air inlet cylinder; 17, pressing rod; 18, base frame; 19, vertical plate frame; 20, conveying sprocket; 21, conveying chain ; 22. Support column; 23. Arc limit plate; 24. Storage frame; 25. Lifting frame; 26. Guide roller; 27. Hydraulic lifting device; 28. Arc guide plate; 29. ​​Double-head adjustment screw; 30. Adjustment gear; 31. Limit rack; 32. Clamping rack; 33. Unlocking rack; 34. Sliding rack; 35. Sliding gear; 36. Adjustment rack; 37. Reset rack; 38. Hydraulic rod; 39. Bottom plate; 40. Sliding shaft. DETAILED DESCRIPTION

[0056] The above and other technical contents, features and effects of the present invention are described in detail below with reference to the attached Figures 1 to 13 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0057] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0058] The present invention relates to a food packaging bag sealing mechanism, packaging equipment and method, wherein the food packaging bag sealing mechanism comprises a support frame 1, wherein the support frame 1 provides a fixed support foundation for subsequent structures, wherein the support frame 1 is internally connected to two symmetrically distributed clamping plates 2 for sliding left and right movement, wherein the support frame 1 is internally connected to a double-headed screw rod 3 for rotation, wherein the two clamping plates 2 and the double-headed screw rod 3 are threadedly connected, wherein the double-headed screw rod 3 is coaxially fixedly connected to a driving gear 4, wherein the driving gear 4 is externally connected to a driving source, wherein the driving gear 4 is rotated to drive the double-headed screw rod 3, wherein the rotation of the double-headed screw rod 3 realizes the reverse sliding of the two clamping plates 2, thereby realizing the clamping of the food packaging bag, and facilitating the subsequent sealing operation of the food packaging bag.

[0059] The clamping plates 2 are each connected with a clamping structure, and the two clamping structures are symmetrically distributed. The clamping structure is used to limit the clamping of the food packaging bag. The clamping plates 2 are each provided with a sealing rail 5, and a heat-sealing mechanism is passed through the sealing rail 5. The heat-sealing mechanism seals the food packaging bag during the process of passing through the sealing rail 5. After the food packaging bag is limited and supported by the clamping structure, the sealing rail 5 is passed through the heat-sealing mechanism to achieve the sealing of the food packaging bag. The heat-sealing mechanism described in this embodiment is a conventional extrusion heat-sealing mechanism, which will not be described in detail here.

[0060] In order to achieve vacuum extraction treatment on the inside of the food packaging bag, a vacuum extraction mechanism is arranged inside the support frame 1. The vacuum extraction mechanism described in this embodiment is a conventional vacuum extraction device and will not be described in detail here. The vacuum extraction mechanism is placed above the clamping structure, and the vacuum extraction treatment of the food packaging bag is achieved through the vacuum extraction mechanism. During the process of clamping the food packaging bag by the clamping structure, the vacuum extraction mechanism extends into the interior of the food packaging bag to perform vacuum extraction treatment on the food packaging bag.

[0061] The clamping structure includes two groups of rotating rollers 6 distributed up and down, and the two groups of rotating rollers 6 are rotatably connected to the clamping plate 2. The outer walls of the rotating rollers 6 are covered with elastic sleeves 7, and the elastic sleeves 7 can undergo elastic changes to enhance the stability of clamping the food packaging bag. The two groups of rotating rollers 6 are distributed up and down, and the food packaging bag is clamped by the two clamping plates 2 sliding in opposite directions. The rotating rollers 6 on the two clamping plates 2 are opposite to each other. When the two clamping plates 2 approach each other, the food packaging bag is clamped by the two opposite groups of rotating rollers 6. The two rotating rollers 6 on the upper side are limited and clamped, and the interior of the two rotating rollers 6 is a hollow structure. The rotating rollers 6 are provided with air holes 8. The rotating rollers 6 are connected to an external exhaust device, and the internal of the rotating rollers 6 is subjected to negative pressure treatment through the external exhaust device, and then the vicinity of the air holes 8 is placed in a negative pressure state through the external exhaust device, so that the food packaging bag can be attached to the rotating rollers 6, which is convenient for the vacuum extraction mechanism to extend into the interior of the food packaging bag to extract vacuum from the food packaging bag, and at the same time, it can also ensure that the vacuum extraction mechanism can smoothly enter the interior of the food packaging bag.

[0062] During the specific implementation of this embodiment, the packaging bag is first placed between the two clamping plates 2, and then the driving source of the driving gear 4 is started. The driving gear 4 drives the double-headed screw 3 to rotate. The rotation of the double-headed screw 3 drives the two clamping plates 2 to move closer to each other, and then drives the rotating rollers 6 to move closer to each other. In the process of the rotating rollers 6 moving closer to each other, the clamping limit of the food packaging bag is achieved. After the limit clamping is completed, the food packaging bag is vacuum treated by the vacuum extraction mechanism. After the treatment is completed, the food packaging bag is extruded and heat-sealed by the heat sealing mechanism. After the heat sealing is completed, the driving gear 4 is driven in the reverse direction. The driving gear 4 drives the double-headed screw 3 to rotate in the reverse direction, thereby realizing the resetting of the clamping plate 2, realizing the unloading of the food packaging bag, and then completing the sealing operation of the food packaging bag.

[0063] The heat sealing mechanism is located between the two rotating rollers 6 distributed up and down, realizing the sealing process at the position between the two rotating rollers 6, ensuring the stability of the sealing process, and the heat sealing mechanism includes two symmetrically distributed heat pressing frames, the two heat pressing frames synchronously telescope and slide, and the two heat pressing frames slide in opposite directions, and the pressurized heat sealing of the food packaging bag is realized in the process that the two heat pressing frames approach each other and penetrate the sealing rail 5.

[0064] In the process of sealing the food packaging bag, the uneven sealing position may cause air leakage or even sealing failure. Therefore, the present embodiment provides a structure for flattening the sealing position. Specifically, the two groups of rotating rollers 6 located on the same clamping plate 2 rotate in opposite directions. The food packaging bag is flattened by the rotation of the rotating rollers 6. At the same time, the two rotating rollers 6 on the upper side rotate in opposite directions, so that the food packaging bag has an upward sliding force. At the same time, the two rotating rollers 6 on the lower side rotate, so that the food packaging bag has a downward sliding force. The flattening of the heat-sealed part of the food packaging bag is achieved through the action of the upper and lower sliding friction forces. The two rotating rollers 6 on the lower side are coaxially fixedly connected with a rotating gear 9. The rotation of the rotating roller 6 drives the rotating gear 9 to rotate synchronously. A transfer gear 10 is meshed next to the rotating gear 9. The rotation of the rotating gear 9 drives the transfer gear 10 to rotate synchronously. The transfer gear 10 is rotationally connected to the clamping plate 2 on the same side. The transfer gear 10 on the same clamping plate 2 and the rotating roller 6 on the upper side are connected through a sprocket transmission mechanism. When the two rotating rollers 6 on the lower side rotate in opposite directions, the two rotating rollers 6 on the upper side are also driven to rotate in opposite directions. The two groups of rotating rollers 6 on the same clamping plate 2 turn in opposite directions, so that the food packaging bag can be flattened.

[0065] The two rotating rollers 6 at the lower side are provided with sliding holes 11 inside, and spiral tracks 12 are provided inside the sliding holes 11. The two spiral tracks 12 rotate in opposite directions. A sliding rod 13 is coaxially slidably connected inside the sliding hole 11. A sliding pin that matches the spiral track 12 is fixedly connected to the sliding rod 13. The sliding pin is driven to slide synchronously during the sliding process of the sliding rod 13. During the sliding process of the sliding pin, due to the limiting cooperation of the sliding pin and the spiral track 12, the two rotating rollers 6 rotate in opposite directions. The reverse rotation of the two rotating rollers 6 on the lower side drives the rotating gear 9 to rotate synchronously. The sliding rod 13 is slidably connected to the sliding shaft 40 slidably connected to the support frame 1. During the sliding process of the clamping plate 2, the sliding rod 13 slides along the axial direction of the sliding shaft 40. At the same time, the sliding shaft 40 slides along the axial direction of the rotating roller 6 to make the sliding rod 13 slide synchronously. During the sliding process of the sliding rod 13, the rotating roller 6 is rotated under the cooperation of the sliding pin and the spiral track 12.

[0066] In order to effectively extract vacuum from the food packaging bag, the vacuum extraction mechanism includes an exhaust pipe 14. An annular groove 15 that matches the exhaust pipe 14 is opened on the two upper rotating rollers 6 to facilitate the exhaust pipe 14 to pass through the rotating rollers 6. The exhaust pipe 14 enters the interior of the food packaging bag through the annular groove 15, and then discharges the gas inside the food packaging bag. A fixed air inlet cylinder 16 is coaxially sleeved on the outside of the exhaust pipe 14. The exhaust pipe 14 and the fixed air inlet cylinder 16 are connected by a spring. The fixed air inlet pipe and the exhaust pipe 1 4 is telescopically and slidably connected, thereby ensuring that the exhaust pipe 14 can be telescopically stored inside the fixed air inlet pipe, the upper end of the exhaust pipe 14 is fixedly connected with a pressing rod 17, and the pressing rod 17 is connected to an external pressing device. By pressing the pressing rod 17, the exhaust pipe 14 is telescopically extended, and the telescopic pipe is placed inside the food packaging bag to achieve vacuum treatment of the food packaging bag. The exhaust pipe 14 is connected to an external exhaust device, and the exhaust pipe 14 is evacuated by the external exhaust device to achieve exhaust treatment of the food packaging bag.

[0067] A packaging device for food packaging bags, including a food packaging bag sealing mechanism, through which the sealing operation of the food packaging bag is achieved, and the packaging device also includes a base frame 18, and a vertical plate frame 19 is fixedly connected to the base frame 18. In order to adjust the height of the vertical plate frame 19 to facilitate the adaptation to the heights of different workers and improve the comfort of work, the base frame 18 includes a bottom plate 39, a hydraulic rod 38 and a lifting seat, the hydraulic rod 38 is connected to an external pressure supply device, the vertical plate frame 19 is lifted and lowered synchronously with the lifting of the hydraulic rod 38, the vertical plate frame 19 is fixedly connected to the lifting seat, the left and right sides of the vertical plate frame 19 are rotatably connected to a conveying sprocket 20, the conveying sprocket 20 is connected to an intermittent driving device disposed at the upper end of the vertical plate frame 19, the intermittent device described in this embodiment is a conventional intermittent rotating structure, which is a prior art, for example, one of the conveying sprockets 20 is connected to a transfer shaft through a sprocket transmission mechanism The transfer shaft is coaxially fixedly connected with a one-way bearing, and the one-way bearing is coaxially fixedly connected with an intermittent gear. An intermittent rack is meshed next to the intermittent gear, and the intermittent rack is threadedly connected with a driving reciprocating screw. The reciprocating sliding of the intermittent rack is achieved through the driving reciprocating screw, thereby driving the intermittent gear to rotate intermittently. The driving reciprocating screw is externally connected to a driving source. A conveying chain 21 is wound between the two conveying sprockets 20. The intermittent rotation process of the conveying sprockets 20 drives the conveying chain 21 to rotate intermittently. A plurality of support columns 22 distributed at equal intervals are fixedly connected to the conveying chain 21. The support columns 22 and the conveying chain 21 rotate synchronously. The support columns 22 are fixedly connected to a sealing mechanism for a food packaging bag. The support frame 1 is fixedly connected to the support columns 22. During the intermittent rotation process of the conveying chain 21, the sealing mechanism for the food packaging bag is driven to rotate intermittently, thereby ensuring the formation of an assembly line and improving production efficiency.

[0068] The left and right end surfaces of the base frame 18 are both provided with arc-shaped limit plates 23, and the two arc-shaped limit plates 23 are symmetrically distributed. During the sliding process of the support frame 1, the pressing rod 17 is driven to rotate synchronously, and the pressing rod 17 is in contact and connected with the arc-shaped limit plates 23. During the sliding process of the support frame 1, the pressing rod 17 slides up and down under the action of the arc-shaped limit plates 23 to adjust the position of the exhaust pipe 14, and the exhaust pipe 14 is placed inside the food packaging bag to perform vacuum extraction. After the support frame 1 enters the inside of the base frame 18, the pressing rod 17 slides down, and the exhaust pipe 14 is placed inside the food packaging bag to perform vacuum extraction.

[0069] The heat sealing mechanism is placed inside the base frame 18. During the intermittent rotation process of the conveying chain 21, the support frame 1 intermittently rotates. During the intermittent sliding process of the support frame 1, when the support frame 1 corresponds to the heat sealing mechanism, the food packaging bag is heat-sealed while the support frame 1 stops sliding. After the heat sealing is completed, the support frame 1 slides again.

[0070] In order to realize the feeding of food packaging bags and to enable the food packaging bags to be processed by assembly line sealing, a structure for feeding food packaging bags is provided. Specifically, a storage frame 24 is fixedly connected to the left end of the base frame 18, and the food packaging bags are limited by the storage frame 24. A lifting frame 25 is connected to the storage frame 24 so as to slide up and down. A plurality of guide rollers 26 are rotatably connected to the lifting frame 25. The food packaging bags are guided by the guide rollers 26 so that the food packaging bags can slide smoothly. The lifting frame 25 is connected to a hydraulic lifting device 27 disposed inside the base frame 18. The lifting frame 25 is driven to lift and slide by the hydraulic lifting device 27. The food packaging bags are placed on the lifting frame 25 to realize the feeding of the food packaging bags. The upper end of the lifting frame 25 is connected to two pairs of sliding devices for front and rear sliding. The arc guide plate 28 is distributed on the lifting frame 25, and the arc guide plate 28 is used to limit the guiding of the food packaging bag. The lifting frame 25 is internally rotatably connected with a double-headed adjusting screw rod 29 threadedly connected to the arc guide plate 28, and the double-headed adjusting screw rod 29 is coaxially fixedly connected with an adjusting gear 30. The front side of the storage frame 24 is fixedly connected with a limiting rack 31 meshing with the adjusting gear 30. During the lifting and lowering process of the lifting frame 25, the adjusting gear 30 rotates under the limiting action of the limiting rack 31, and the rotation of the adjusting gear 30 drives the double-headed adjusting screw rod 29 to rotate, thereby making the two arc guide plates 28 approach each other, thereby sliding the food packaging bag to the middle position of the lifting frame 25, so as to facilitate the placement of the food packaging bag between the two clamping plates 2, and facilitate the subsequent limited clamping of the food packaging bag.

[0071] In order to ensure effective control over the lifting of the lifting frame 25 and ensure that the lifting frame 25 places the food packaging bag between the two clamping plates 2 in a timely and accurate manner, four rectangularly distributed infrared transmitters are fixedly connected to the upper end of the lifting frame 25, and the support frame 1 is connected to an infrared receiver that matches the infrared transmitter. The infrared receiver is connected to a control module placed on the base frame 18, and the hydraulic lifting device 27 is controlled by the control module, thereby ensuring that the food packaging bag can enter the interior of the food packaging bag sealing mechanism well after loading for sealing.

[0072] In order to ensure that the support frame 1 can drive the clamping plate 2 during the sliding process, a clamping rack 32 is fixedly connected to the left side of the base frame 18. During the sliding process of the support frame 1, the driving gear 4 is rotated by limiting the clamping rack 32, and the two clamping plates 2 are in a clamping state. After loading, during the synchronous sliding process of the food packaging bag and the support frame 1, the clamping plates 2 approach each other to clamp and fix the food packaging bag.

[0073] After the sealing is completed, in order to facilitate unloading, an unlocking rack 33 is fixedly connected to the right side of the base frame 18. During the sliding process of the support frame 1, the driving gear 4 is rotated in the opposite direction through the limiting of the unlocking rack 33, and the two clamping plates 2 are in an open state. At this time, the food packaging bag, the clamping plate 2 and the rotating roller 6 fall off to achieve unloading.

[0074] In order to realize the sliding process of the support frame 1, the sliding shaft 40 is effectively driven to ensure that the sealing position of the food packaging bag is flattened, so the sliding shaft 40 is fixedly connected to the side away from the vertical plate frame 19 and is slidably connected to the base frame 18. The sliding rack 34 is fixedly provided with teeth on both the upper and lower sides. The sliding process of the sliding rack 34 drives the sliding shaft 40 to slide synchronously. The upper and lower sides of the sliding rack 34 are meshed with sliding gears 35. The sliding gear 35 is a one-way gear. The two sliding gears 35 rotate in opposite directions. The sliding gear 35 rotates At the same time, it drives the sliding rack 34 to slide. The sliding gear 35 is connected to the clamping plate 2 through a telescopic rod. When the clamping plate 2 slides, it drives the sliding gear 35 to slide synchronously. When the sliding gear 35 and the sliding rack 34 are engaged, the sliding gear 35 rotates, thereby driving the sliding rack 34 to realize the rotation of the rotating roller 6. An adjusting rack 36 is connected to the right side of the clamping rack 32 inside the base frame 18. During the sliding process of the support frame 1, under the limiting action of the adjusting rack 36, the sliding gear 35 rotates to make the sliding rack 34 slide.

[0075] A reset rack 37 is connected to the left side of the unlocking rack 33 inside the base frame 18. During the sliding process of the support frame 1, under the limiting effect of the reset rack 37, the sliding gear 35 rotates to reset the sliding rack 34.

[0076] When the present invention is used in practice, the driving source of the conveying sprocket 20 is started, the conveying sprocket 20 realizes intermittent rotation, and then drives the conveying chain 21 to rotate intermittently, and the conveying chain 21 drives the support frame 1 to rotate intermittently, firstly, the food packaging bag is placed on the lifting frame 25, when one of the support frames 1 corresponds to the lifting frame 25, then the driving source of the hydraulic lifting device 27 is started, the lifting frame 25 rises, and the food packaging bag is placed inside the support frame 1, and then under the action of the clamping rack 32 and the driving gear 4, the clamping plates 2 approach each other to achieve limited clamping of the food packaging bag, and the rotating sprocket rotates, driving the food packaging bag to slide synchronously through the support frame 1, and during the sliding process, the sliding gear 35 moves in the adjustment The gear 35 is driven by the gear 36 to rotate, thereby driving the sliding gear 34, and then driving the rotating roller 6 to rotate, so as to achieve the flattening treatment of the food packaging bag. After the flattening treatment is completed, the food packaging bag is vacuum treated by the vacuum extraction mechanism. After the treatment is completed, the food packaging bag is extruded and heat-sealed by the heat sealing mechanism. After the heat sealing is completed, the reset rack 37 drives the other sliding gear 35 to reset the rotating roller 6, and then the support frame 1 continues to slide, and the driving gear 4 is driven in the reverse direction under the action of the unlocking rack 33. The driving gear 4 drives the double-headed screw 3 to rotate in the reverse direction, thereby realizing the reset of the clamping plate 2, realizing the unloading of the food packaging bag, and completing the sealing operation of the food packaging bag.

[0077] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A food packaging bag sealing mechanism, comprising a support frame (1) and a base frame (18), characterized in that: The support frame (1) is internally connected to two symmetrically distributed clamping plates (2) for sliding left and right, the support frame (1) is internally connected to a double-headed screw (3) for rotation, the two clamping plates (2) and the double-headed screw (3) are threadedly connected, the double-headed screw (3) is coaxially fixedly connected to a driving gear (4), the driving gear (4) is externally connected to a driving source, and drives the two clamping plates (2) to slide in opposite directions through the double-headed screw (3); The clamping plates (2) are each connected to a clamping structure, and the two clamping structures are symmetrically distributed, and the food packaging bag is clamped in a limited position by the clamping structure; The clamping plates (2) are each provided with a sealing rail (5), and a heat sealing mechanism is passed through the interior of the sealing rail (5), and the heat sealing mechanism seals the food packaging bag in the process of passing through the sealing rail (5); The support frame (1) is provided with a vacuum extraction mechanism inside, and the vacuum extraction mechanism is placed above the clamping structure, and vacuum extraction processing of the food packaging bag is achieved through the vacuum extraction mechanism; The clamping structure comprises two groups of rotating rollers (6) distributed up and down, the rotating rollers (6) are all rotatably connected to the clamping plate (2), the outer walls of the rotating rollers (6) are all covered with elastic sleeves (7), and the clamping of the food packaging bag is achieved by the reverse sliding of the clamping plate (2), the interior of the two rotating rollers (6) on the upper side is a hollow structure, and the rotating rollers (6) are provided with air holes (8), and the rotating rollers (6) are all connected to an external exhaust device, and the air holes (8) are placed in a negative pressure state through the external exhaust device, so that the food packaging bag can be attached to the rotating rollers (6), so as to facilitate the vacuum extraction of the food packaging bag; The two groups of rotating rollers (6) located on the same clamping plate (2) rotate in opposite directions, and the food packaging bag is smoothed by the rotation of the rotating rollers (6). The two rotating rollers (6) on the lower side are coaxially fixedly connected with a rotating gear (9), and a transfer gear (10) is meshed next to the rotating gear (9). The transfer gear (10) is rotationally connected to the clamping plate (2) on the same side. The transfer gear (10) on the same clamping plate (2) and the rotating rollers (6) on the upper side are connected through a sprocket transmission mechanism. When the two rotating rollers (6) on the lower side rotate in opposite directions, the two rotating rollers (6) on the upper side are driven to rotate in opposite directions. The two groups of rotating rollers (6) on the same clamping plate (2) rotate in opposite directions. The two rotating rollers (6) at the lower side are provided with sliding holes (11) inside, and spiral tracks (12) are provided inside the sliding holes (11). The two spiral tracks (12) rotate in opposite directions. A sliding rod (13) is coaxially slidably connected inside the sliding holes (11). A sliding pin that matches the spiral track (12) is fixedly connected to the sliding rod (13). The sliding rod (13) is slidably connected to a sliding shaft (40) slidably connected to the support frame (1). The sliding process of the sliding shaft (40) causes the sliding rod (13) to slide synchronously, thereby causing the rotating roller (6) to rotate. The vacuum extraction mechanism comprises an exhaust pipe (14), and an annular groove (15) matching with the exhaust pipe (14) is provided on the two upper rotating rollers (6) to facilitate the exhaust pipe (14) to pass through the rotating rollers (6). A fixed air inlet cylinder (16) is coaxially sleeved on the outside of the exhaust pipe (14). The exhaust pipe (14) and the fixed air inlet cylinder (16) are connected by a spring. A pressing rod (17) is fixedly connected to the upper end of the exhaust pipe (14). The pressing rod (17) is connected to an external pressing device. By pressing the pressing rod (17), the exhaust pipe (14) can be extended and retracted, thereby placing the retractable pipe inside the food packaging bag. The exhaust pipe (14) is connected to an external exhaust device. The base frame (18) is fixedly connected to a vertical plate frame (19), and the left and right sides of the vertical plate frame (19) are rotatably connected to conveying sprockets (20), the conveying sprockets (20) are connected to an intermittent driving device arranged at the upper end of the vertical plate frame (19), a conveying chain (21) is wound between the two conveying sprockets (20), and the conveying chain (21) is fixedly connected to a plurality of support columns (22) distributed at equal intervals, the support columns (22) and the conveying chain (21) rotate synchronously, the support columns (22) are fixedly connected to a food packaging bag sealing mechanism, and the support frame (1) and the support columns (22) are fixedly connected; The left and right end surfaces of the base frame (18) are both provided with arc-shaped limit plates (23), the pressing rod (17) and the arc-shaped limit plates (23) are in contact and connected, and the pressing rod (17) slides up and down under the action of the arc-shaped limit plates (23) to adjust the position of the exhaust pipe (14); The heat-sealing mechanism is placed inside the base frame (18) and heat-seals the food packaging bags one by one during the intermittent sliding process of the support frame (1); A clamping rack (32) is fixedly connected to the left side of the base frame (18). During the sliding process of the support frame (1), the driving gear (4) is rotated by limiting the position of the clamping rack (32), and the two clamping plates (2) are in a clamping state. An unlocking rack (33) is fixedly connected to the right side of the base frame (18), and during the sliding process of the support frame (1), the driving gear (4) is rotated in the opposite direction by limiting the position of the unlocking rack (33), and the two clamping plates (2) are in an open state; The sliding shaft (40) is fixedly connected to a sliding rack (34) that is slidably connected to the base frame (18) on one side away from the vertical plate frame (19); a sliding gear (35) is meshed on the upper side of the sliding rack (34); the sliding gear (35) is connected to the clamping plate (2) through a telescopic rod; an adjusting rack (36) is connected to the right side of the clamping rack (32) inside the base frame (18); during the sliding process of the support frame (1), under the limiting action of the adjusting rack (36), the sliding gear (35) rotates to make the sliding rack (34) slide; A reset rack (37) is connected to the left side of the unlocking rack (33) inside the base frame (18). During the sliding process of the support frame (1), under the limiting action of the reset rack (37), the sliding gear (35) rotates to reset the sliding rack (34).

2. A food packaging bag sealing mechanism according to claim 1, characterized in that: The heat sealing mechanism is located between the two rotating rollers (6) distributed up and down, and comprises two symmetrically distributed heat pressing frames, which are telescopically and slidably connected, and the heat pressing frames penetrate the sealing rail (5) to achieve pressurized heat sealing of the food packaging bag.

3. A food packaging bag sealing mechanism according to claim 2, characterized in that ， A packaging device for food packaging bags, characterized in that a food packaging bag sealing mechanism according to claim 2 is used, the left end of the base frame (18) is fixedly connected to a storage frame (24), the interior of the storage frame (24) is slidably connected to a lifting frame (25), a plurality of guide rollers (26) are rotatably connected to the lifting frame (25), the lifting frame (25) is connected to a hydraulic lifting device (27) disposed inside the base frame (18), the upper end of the lifting frame (25) is slidably connected to two symmetrically distributed arc guide plates (28), the interior of the lifting frame (25) is rotatably connected to a double-headed adjusting screw (29) threadedly connected to the arc guide plate (28), the double-headed adjusting screw (29) is coaxially fixedly connected to an adjusting gear (30), and the front side of the storage frame (24) is fixedly connected to a limit rack (31) meshing with the adjusting gear (30); Four rectangularly distributed infrared transmitters are fixedly connected to the upper end of the lifting frame (25), an infrared receiver matched with the infrared transmitter is connected to the support frame (1), and the infrared receiver is connected to a control module placed on the base frame (18).

4. A method for using a packaging device for a food packaging bag, characterized in that: The packaging device using the food packaging bag according to claim 3 comprises the following steps: Step 1: starting the driving source of the conveying sprocket (20), so that the conveying sprocket (20) rotates intermittently, causing the support frame (1) to rotate intermittently; Step 2: placing the food packaging bag on the lifting frame (25); when one of the support frames (1) and the lifting frame (25) correspond to each other, the hydraulic lifting device (27) is started, the lifting frame (25) rises, and the food packaging bag is placed inside the support frame (1); Step 3: When the support frame (1) drives the food packaging bag to slide, the food packaging bag is clamped by the rotating roller (6); Step 4: After the clamping is completed, the food packaging bag is flattened by rotating the rotating roller (6); Step 5: After the food packaging bag is flattened, the food packaging bag is vacuumized by the vacuum extraction mechanism; Step 6: Then, during the sliding process of the food packaging bag, the food packaging bag is sealed by the heat sealing mechanism; Step seven: by rotating and resetting the rotating roller (6) and moving the rotating rollers (6) away from each other, the contact limiting clamping process of the food packaging bag is achieved, thereby realizing the entire sealing operation.

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