A clamping automatic vacuum packaging machine

Abstract

The present invention provides a clamping type automatic vacuum packaging machine, which relates to the technical field of packaging machines, including a sealing sleeve installed on the lower sealing shell, a plurality of suction pipes installed on the sealing sleeve at equal intervals, a limiting sleeve installed in the suction pipe, a tension spring installed between the limiting sleeve and the upper end of the suction pipe, a plurality of fixing rings installed on the tension spring at equal intervals, a stud threadedly installed on the fixing ring, a screw rod coaxially installed on the lower end of the stud, a one-way disk fitted on the limiting sleeve, and the screw rod threadedly connected in the one-way disk. The equipment realizes the simultaneous completion of loading, sealing, cutting and unloading operations in the same cycle through an integrated clamping mechanism, the clamper removes the sealed finished product while placing a new packaging box, greatly shortening the process interval time, and the conveying rollers on both sides automatically pull the sealing film, and there is no need for manual intervention in film replacement, thereby ensuring uninterrupted operation of the production line.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging machines, and more particularly to a clamping type automatic vacuum packaging machine. Background Art

[0002] In the current packaging industry, clamp-type automatic vacuum packaging machines are an important terminal packaging equipment. Their performance and efficiency directly affect the freshness, shelf life and market competitiveness of products. However, existing clamp-type automatic vacuum packaging machines have significant technical bottlenecks. The traditional vacuum packaging process usually adopts a slow vacuuming method. That is, after the sealing chamber is formed, the vacuuming system gradually reduces the pressure in the sealing cavity at a relatively slow rate. This slow process of forming negative pressure increases the risk of air leakage during the packaging process. During the slow vacuuming process, the tiny gap between the packaging material and the product box can easily form an airflow channel. External air will continue to penetrate into the sealing cavity along these channels, resulting in the failure to achieve the expected vacuum degree. In addition, long-term slow vacuuming will also cause slight deformation and displacement of the sealing material, further increasing the possibility of air leakage, making it impossible for the packaging system to establish a stable and effective vacuum environment.

[0003] More importantly, the poor vacuum adsorption effect caused by this slow exhaustion has a series of chain reactions on the entire packaging process. Vacuum adsorption is a key step to ensure that the packaging material fits tightly with the product box. When the adsorption effect is not ideal, the packaging material cannot completely fit the product surface, and will form wrinkles, bubbles or loose seals in the subsequent heat sealing and molding process. These defects not only affect the appearance of the product and reduce market competitiveness, but more seriously, they will lead to a decrease in the airtightness of the packaging, allowing external oxygen, moisture and microorganisms to invade the interior of the packaging, accelerating the oxidation, deterioration and corruption of the product. For products with extremely high requirements for the packaging environment, such as food, medicine and precision electronic components, this packaging defect may directly lead to product scrapping or safety hazards. In addition, poor vacuum adsorption effect will also increase the defective rate and material waste of the production line, extend the production cycle, increase energy consumption and labor costs, and affect the production efficiency and economic benefits of the enterprise. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the problems existing in the prior art, the present invention provides a clamping type automatic vacuum packaging machine to solve the technical problems mentioned in the background technology.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a clamping automatic vacuum packaging machine, comprising a lower sealing shell; further comprising a negative pressure mechanism, the negative pressure mechanism comprising a sealing sleeve mounted on the lower sealing shell, a plurality of suction pipes being mounted on the sealing sleeve at equal intervals, a limiting sleeve being mounted in the suction pipe, a tension spring being mounted between the limiting sleeve and the upper end of the suction pipe, a plurality of fixing rings being mounted on the tension spring at equal intervals, a stud being threadedly mounted on the fixing ring, a screw being coaxially mounted on the lower end of the stud, a one-way disk being fitted on the limiting sleeve, the screw being threadedly connected in the one-way disk, the stud and the one-way disk having the same pitch, an intermediate rod being coaxially mounted on the one-way disk, a plurality of magnetic heads being mounted on the side wall of the intermediate rod, a magnetic ring being mounted on the inner wall of the suction pipe, a through groove being provided on the magnetic ring, and the magnetic ring and the magnetic head being arranged with the same polarity; further comprising a self-priming mechanism, the self-priming mechanism comprising a self-priming pipe and a suction cup mounted on the self-priming pipe.

[0008] Preferably, the negative pressure mechanism includes a positioning rod and a fixing frame installed in the suction pipe, a positioning groove is provided in the intermediate rod, and the positioning rod is slidably connected in the positioning groove.

[0009] Preferably, a clamp is installed on the fixing frame, two clamping plates are installed at both ends of the clamp, conveying rollers are installed at both ends of the fixing frame, sealing films are wrapped around the two conveying rollers, and multiple conveyors are installed on the fixing frame.

[0010] Preferably, a plurality of top rods are mounted on the fixing frame, an upper sealing shell is slidably mounted on the plurality of top rods, a top spring is sleeved on the top rod, the top spring abuts against the upper sealing shell, and a pressure plate is mounted on the lower end of the top rod.

[0011] Preferably, a plurality of groups of springs are installed at the lower end of the pressing plate, a plurality of heating blocks are installed on the plurality of groups of springs, and a plurality of cutting sheets sleeved on the heating blocks are installed on the pressing plate.

[0012] Preferably, a reducer is installed on the fixed frame, a motor is installed on the reducer, a rocking plate is installed on the protruding end of the reducer, the other end of the rocking plate is rotatably connected to a follower plate, the follower plate is rotatably connected to a synchronous block, two reciprocating rods are installed on the synchronous block, and the two reciprocating rods are connected to the lower sealing shell.

[0013] Preferably, a plurality of piston rods are sealingly and slidingly connected to the lower sealing shell, and the lower ends of the plurality of piston rods are fixedly connected to the fixing frame, a plurality of boxes are installed in the sealing sleeve, and the sealing film is attached to the lower sealing shell.

[0014] Preferably, a bottom plate is fixedly mounted on the piston rod, and the self-priming pipe is mounted on the bottom plate.

[0015] Preferably, a suction disc is slidably installed in the self-suction pipe, the suction disc is sealingly slidably connected in the self-suction pipe, a pressure rod is installed at the upper end of the suction disc, a return spring is installed at the lower end of the suction disc, and the return spring is connected to the self-suction pipe.

[0016] Preferably, a communicating hole is provided at the lower end of the self-suction pipe.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention provides a clamping type automatic vacuum packaging machine with the following beneficial effects:

[0019] The equipment uses an integrated clamping mechanism to achieve simultaneous completion of loading, sealing, cutting and unloading operations within the same cycle. The clamper removes the sealed finished product while placing the new packaging box, significantly shortening the interval between processes. The conveyor rollers on both sides automatically pull the sealing film, eliminating the need for manual intervention to change the film and ensuring uninterrupted operation of the production line.

[0020] It adopts a magnetic-spring double sealing valve: in the initial stage, the magnetic repulsion and spring tension work together to seal, ensuring that the external air pressure is isolated before the sealing chamber is completely closed; when the negative pressure in the cavity reaches the preset threshold (exceeding the sum of the spring and magnetic forces), the valve automatically opens to transmit the negative pressure to avoid premature leakage. By adjusting the number of effective spring turns, the opening pressure of the sealing valve can be changed to adapt to the pressure resistance requirements of different packaging boxes (such as fragile items requiring a lower negative pressure). The sealing sleeve rises with the packaging box to form an independent sealing unit. After the negative pressure is transmitted, the sealing film is immediately adsorbed to fit tightly against the box opening, maintaining the vacuum degree of the cavity before heat sealing, eliminating the problem of loose sealing caused by leakage in traditional equipment.

[0021] After opening, the magnetic pole action is reversed (repulsion becomes attraction), which helps maintain the open state and ensures efficient transmission of negative pressure; when resetting, the magnetic force and spring work together to accelerate the closing and improve the response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a clamping type automatic vacuum packaging machine in the present invention;

[0023] Figure 2 Schematic diagram of the structure of the upper sealing shell and the lower sealing shell in the present invention;

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure;

[0025] Figure 4 Schematic diagram of the cross-sectional structure of the lower sealing shell of the present invention;

[0026] Figure 5 Schematic diagram of the structure of the lower sealed shell and the box in the present invention;

[0027] Figure 6 Schematic diagram of the cross-sectional structure of the upper sealing shell in the present invention;

[0028] Figure 7 Schematic diagram of the cross-sectional structure of the suction pipe and the magnetic ring in the present invention;

[0029] Figure 8 Schematic diagram of the cross-sectional structure of the intermediate rod in the present invention;

[0030] Figure 9 Schematic diagram of the cross-sectional structure of the air intake pipe in the present invention;

[0031] Figure 10 Schematic diagram of the structure of the self-priming pipe in the present invention;

[0032] Figure 11 It is a schematic cross-sectional structural diagram of the self-priming tube in the present invention.

[0033] In the figure: 11, lower sealing shell; 21, sealing sleeve; 22, suction pipe; 23, limiting sleeve; 24, tension spring; 25, fixing ring; 26, stud; 27, screw; 28, one-way disk; 29, intermediate rod; 31, self-suction pipe; 32, suction cup; 33, suction cup; 34, pressure rod; 35, return spring; 36, connecting hole; 210, magnetic head; 211, magnetic ring; 212, through groove; 213, positioning rod; 214, fixing frame; 215, positioning groove; 21 6. Clamp; 217. Clamp; 218. Conveyor roller; 219. Sealing film; 220. Conveyor; 221. Top rod; 222. Upper sealing shell; 223. Top spring; 224. Pressure plate; 225. Spring; 226. Heating block; 227. Cutting disc; 228. Reducer; 229. Motor; 230. Rocker plate; 231. Follower plate; 232. Synchronizing block; 233. Reciprocating rod; 234. Piston rod; 235. Box; 236. Bottom plate. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0037] See also Figures 1 to 11, a clamping type automatic vacuum packaging machine includes a lower sealing shell 11; it also includes a negative pressure mechanism, the negative pressure mechanism includes a sealing sleeve 21 installed on the lower sealing shell 11, a plurality of suction pipes 22 are installed on the sealing sleeve 21 at equal intervals, a limiting sleeve 23 is installed in the suction pipe 22, a tension spring 24 is installed between the limiting sleeve 23 and the upper end of the suction pipe 22, a plurality of fixing rings 25 are installed on the tension spring 24 at equal intervals, a stud 26 is threadedly installed on the fixing ring 25, a screw 27 is coaxially installed at the lower end of the stud 26, a one-way disk 28 is fitted on the limiting sleeve 23, the screw 27 is threadedly connected to the one-way disk 28, the stud 26 and the one-way disk 28 have the same pitch, and the one-way disk An intermediate rod 29 is coaxially mounted on the upper surface of the air intake pipe 28, and a plurality of magnetic heads 210 are mounted on the side walls of the intermediate rod 29. A magnetic ring 211 is mounted on the inner wall of the air intake pipe 22, and a through slot 212 is provided on the magnetic ring 211. The magnetic ring 211 and the magnetic head 210 are arranged with the same polarity. The negative pressure mechanism includes a positioning rod 213 and a fixing frame 214 mounted in the air intake pipe 22. A positioning slot 215 is provided in the intermediate rod 29, and the positioning rod 213 is slidably connected in the positioning slot 215. A clamp 216 is mounted on the fixing frame 214, and two clamps 217 are mounted at both ends of the clamp 216. Conveying rollers 218 are mounted at both ends of the fixing frame 214, and the two conveying rollers 218 are respectively mounted on the two conveying rollers 218. A sealing film 219 is wound and connected, a plurality of conveyors 220 are installed on the fixed frame 214, a plurality of top rods 221 are installed on the fixed frame 214, an upper sealing shell 222 is slidably installed on the plurality of top rods 221, a top spring 223 is sleeved and installed on the top rod 221, the top spring 223 is in contact with the upper sealing shell 222, a pressure plate 224 is installed at the lower end of the top rod 221, a plurality of groups of springs 225 are installed at the lower end of the pressure plate 224, a plurality of heating blocks 226 are installed on the plurality of groups of springs 225, a plurality of cutting blades 227 sleeved on the heating block 226 are installed on the pressure plate 224, a reducer 228 is installed on the fixed frame 214, and a top spring 223 is installed on the top rod 221. It is equipped with a motor 229, and a rocking plate 230 is installed on the protruding end of the reducer 228. The other end of the rocking plate 230 is rotatably connected to a follower plate 231, and the follower plate 231 is rotatably connected to the synchronization block 232. Two reciprocating rods 233 are installed on the synchronization block 232. The two reciprocating rods 233 are connected to the lower sealing shell 11. A plurality of piston rods 234 are sealingly and slidingly connected to the lower sealing shell 11, and the lower ends of the plurality of piston rods 234 are fixedly connected to the fixing frame 214. A plurality of boxes 235 are installed in the sealing sleeve 21, and the sealing film 219 is attached to the lower sealing shell 11. A base plate 236 is fixedly installed on the piston rod 234, and the self-suction pipe 31 is installed on the base plate 236.

[0038] When the corresponding box 235 is sealed, the sealing film 219 is driven to move along with it by the conveying rollers 218 on both sides. First, the multiple boxes 235 are conveyed to the corresponding positions by the conveyor 220, and then the clamping device 216 can drive the clamping plates 217 on both sides to clamp and move. The sealed box 235 will be unloaded while loading. In the initial state, the lower sealing shell 11 is at the lowest position. At this time, the box 235 will be placed on multiple bottom plates 236 through the two clamping plates 217, and then it will be adsorbed and positioned with a small force by the suction cup 32. Then the motor 229 is started, and the reducer 228 drives the shaking plate 230 to rotate, and then the follower plate 231 is used to synchronize the boxes. The block 232 is pulled upward, and the reciprocating rod 233 moves upward accordingly. Since the reciprocating rod 233 presses on the lower sealing shell 11, it will drive the lower sealing shell 11 to move upward. Since the piston rod 234 is fixedly installed on the fixing frame 214, the piston rod 234 will slide with the lower sealing shell 11 in a sealed manner, and then the volume inside the lower sealing shell 11 will be reduced, and the completion gas will be sucked into the lower sealing shell 11. As it continues to rise, multiple sealing sleeves 21 press on the box 235, which will drive the box 235 to move upward. The initial adsorption force provided by the suction cup 32 ensures the sealing fit between the box 235 and the sealing sleeve 21. As it continues to move upward, multiple sealing sleeves 21 are sealed by the box 235, and then the lower sealing shell 11 is in a sealed state. Since the one-way disk 28 is in a sealed state under the action of the tension spring 24 and the magnetic force, the negative pressure at the lower end will not be transmitted to the upper end. As it continues to move upward, the lower sealing shell 11 will come into contact with the upper sealing shell 222 and exert pressure to seal the multiple sealing sleeves 21 separately through the upper sealing shell 222, and press the sealing film 219 onto the multiple sealing sleeves 21. At this time, the box 235 has not moved to the position of the heating block 226, and the position of the box 235 is lower than the position of the sealing film 219. When the multiple sealing sleeves 21 are in a sealed state, the multiple suction pipes 22 are unsealed at this time, and the negative pressure of the lower sealing shell 11 is transmitted to the sealing film 219, causing the sealing film 219 to move downward and fit onto the box 235. At this time, the lower sealing shell 11 continues to move upward until the heating block 226 is pressed on the sealing film 219. At this time, the sealing film 219 is immediately heated and heat-sealed on the box 235, and the negative pressure has no time to leak at this time, thereby ensuring the effect of negative pressure. As the heat sealing proceeds, the lower sealing shell 11 will continue to move upward until the cutting knife cuts the sealing film 219, thereby completing the sealing process. As the cutting knife cuts the sealing film 219, the atmospheric pressure is restored, and then it moves downward so that the box 235 is pressed against the bottom plate 236. After the seal is untied, the connection between the box 235 and the sealing sleeve 21 is unsealed, and then the splint 217 is used to unload it, and the new box 235 is placed on the bottom plate 236, thereby completing a cycle.

[0039] As the pressure continues to decrease, the pressure acting on the one-way disk 28 continues to increase. Since the stud 26 is connected to the fixed ring 25, it will drive the tension spring 24 to move downward, and the magnetic ring 211 and the magnetic head 210 are set with the same polarity, so a thrust will be generated. As the negative pressure exceeds the sum of the tension force and the magnetic force of the tension spring 24, the one-way disk 28 moves downward, unlocking the seal between it and the limit sleeve 23. At this time, the thrust of the magnetic head 210 and the magnetic ring 211 is in the opposite direction, and then the magnetic force and the tension are in the opposite direction. Before opening, the tension and the magnetism work together to ensure the sealing effect. As a result, after the seal is released, the magnetic force and the pulling force are in opposite directions, which will help to continuously open and ensure the transmission of negative pressure. When the transmission is completed, it will reset because the pulling force is greater than the magnetic force, ensuring the next sealing negative pressure effect. Since the stud 26 can be connected to different numbers of fixed rings 25, the effective number of turns of the tension spring 24 can be changed, thereby changing the stiffness coefficient of the tension spring 24, and then changing the tension generated per unit distance, so that it can be adjusted accordingly according to different situations, ensuring that the seal of the one-way disc 28 can be released after the sealing sleeve 21 is sealed.

[0040] The self-priming mechanism includes a self-priming pipe 31 and a suction cup 32 installed on the self-priming pipe 31. A suction cup 33 is slidably installed in the self-priming pipe 31. The suction cup 33 is sealingly and slidably connected in the self-priming pipe 31. A pressure rod 34 is installed at the upper end of the suction cup 33, and a return spring 35 is installed at the lower end of the suction cup 33. The return spring 35 is connected to the self-priming pipe 31. A connecting hole 36 is opened at the lower end of the self-priming pipe 31.

[0041] When the box 235 is pressed on the pressure rod 34 and fits on the suction cup 32, the pressure rod 34 will be driven to move downward, and the suction cup 33 will move downward to generate negative pressure, so that the suction cup 32 is adsorbed on the box 235, providing a small force positioning. When it moves upward, the seal will be released so that it can easily proceed to the next operation.

[0042] In all the schemes mentioned above, the connection between the two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be described here one by one. In the above, all fixed connections are preferably considered to be welding. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping type automatic vacuum packaging machine, comprising a lower sealing shell (11); characterized in that: The negative pressure mechanism also includes a sealing sleeve (21) installed on the lower sealing shell (11), a plurality of suction pipes (22) are installed on the sealing sleeve (21) at equal intervals, a limiting sleeve (23) is installed in the suction pipe (22), a tension spring (24) is installed between the limiting sleeve (23) and the upper end of the suction pipe (22), a plurality of fixing rings (25) are installed on the tension spring (24) at equal intervals, a stud (26) is threadedly installed on the fixing ring (25), a screw (27) is coaxially installed at the lower end of the stud (26), a one-way disc (23) is fitted on the limiting sleeve (23), and a screw rod (27) is coaxially installed on the lower end of the stud (26). 8), the screw rod (27) is threadedly connected in the one-way disk (28), the screw pitch of the stud (26) and the one-way disk (28) is the same, an intermediate rod (29) is coaxially mounted on the one-way disk (28), a plurality of magnetic heads (210) are mounted on the side wall of the intermediate rod (29), a magnetic ring (211) is mounted on the inner wall of the suction pipe (22), a through groove (212) is provided on the magnetic ring (211), and the magnetic ring (211) and the magnetic head (210) are arranged with the same polarity; and further comprising a self-priming mechanism, the self-priming mechanism comprising a self-priming pipe (31) and a suction cup (32) mounted on the self-priming pipe (31).

2. The clamping type automatic vacuum packaging machine according to claim 1, characterized in that: The negative pressure mechanism comprises a positioning rod (213) and a fixing frame (214) installed in the suction pipe (22); a positioning groove (215) is provided in the intermediate rod (29); and the positioning rod (213) is slidably connected in the positioning groove (215).

3. The clamping type automatic vacuum packaging machine according to claim 2, characterized in that: A clamp (216) is installed on the fixed frame (214), two clamping plates (217) are installed at both ends of the clamp (216), conveying rollers (218) are installed at both ends of the fixed frame (214), and sealing films (219) are respectively wound around the two conveying rollers (218), and a plurality of conveyors (220) are installed on the fixed frame (214).

4. The clamping type automatic vacuum packaging machine according to claim 3, characterized in that: A plurality of top rods (221) are mounted on the fixing frame (214), an upper sealing shell (222) is slidably mounted on the plurality of top rods (221), a top spring (223) is sleeved and mounted on the top rods (221), the top spring (223) abuts against the inside of the upper sealing shell (222), and a pressure plate (224) is mounted on the lower end of the top rod (221).

5. The clamping type automatic vacuum packaging machine according to claim 4, characterized in that: A plurality of groups of springs (225) are installed at the lower end of the pressing plate (224), a plurality of heating blocks (226) are installed on the plurality of groups of springs (225), and a plurality of cutting sheets (227) sleeved on the heating blocks (226) are installed on the pressing plate (224).

6. The clamping type automatic vacuum packaging machine according to claim 5, characterized in that: A reducer (228) is mounted on the fixed frame (214), a motor (229) is mounted on the reducer (228), a rocking plate (230) is mounted on the protruding end of the reducer (228), the other end of the rocking plate (230) is rotatably connected to a follower plate (231), the follower plate (231) is rotatably connected to a synchronous block (232), two reciprocating rods (233) are mounted on the synchronous block (232), and the two reciprocating rods (233) are connected to the lower sealing shell (11).

7. The clamping type automatic vacuum packaging machine according to claim 6, characterized in that: A plurality of piston rods (234) are sealingly and slidingly connected to the lower sealing shell (11), and the lower ends of the plurality of piston rods (234) are fixedly connected to the fixing frame (214). A plurality of boxes (235) are installed in the sealing sleeve (21), and the sealing film (219) is attached to the lower sealing shell (11).

8. The clamping type automatic vacuum packaging machine according to claim 7, characterized in that: A bottom plate (236) is fixedly mounted on the piston rod (234), and the self-priming pipe (31) is mounted on the bottom plate (236).

9. The clamping type automatic vacuum packaging machine according to claim 1, characterized in that: An air suction disc (33) is slidably mounted in the self-suction pipe (31). The air suction disc (33) is sealingly and slidably connected in the self-suction pipe (31). A pressure rod (34) is mounted on the upper end of the air suction disc (33). A return spring (35) is mounted on the lower end of the air suction disc (33). The return spring (35) is connected to the self-suction pipe (31).

10. The clamping type automatic vacuum packaging machine according to claim 1, characterized in that: A communication hole (36) is provided at the lower end of the self-suction pipe (31).

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