Vacuum bin for packaging

Abstract

The utility model discloses a vacuum bin for packaging, which comprises a bag placing bin, two sealing blocks and a vacuum cover, at least one of the two sealing blocks is provided with a middle sealing block and side sealing blocks which are respectively arranged outside two sides of the middle sealing block, and the two side sealing blocks are matched with the middle sealing block in a way of translating relative to the middle sealing block. When the two side sealing blocks abut against and make contact with the other sealing block, a through opening communicated with the bag containing bin is formed between the middle sealing block and the other sealing block, and the side sealing blocks and the vacuum cover are tightly attached and matched to seal the bag containing cavity to form a vacuum chamber. When the side sealing blocks and the middle sealing block jointly abut against and make contact with the other sealing block, the bag containing cavity is sealed to form a vacuum chamber, and the vacuum chamber is provided with an extraction opening. Compared with the prior art, the whole vacuum bin can form a vacuum cavity with two different purposes, application functions are diversified, and the vacuum bin has the advantages of being simple in overall structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the field of packaging, and particularly relates to a vacuum chamber for packaging. Background Art

[0002] Most traditional packaging methods for foods such as tea and grains are to manually pour the food into the packaging bag and then transfer it to a sealing machine for sealing. This packaging method is slow, and the materials are likely to fall out during pouring. Moreover, the food in the bag is in a loose state after packaging. For this reason, vacuum packaging methods have emerged on the market. For example, the packaging equipment developed by the inventor with the publication number CN115384880B forms a vacuum chamber by the relative reciprocating movement of the bag placing member and the vacuum cover in the height direction. The vacuum pumping mechanism can complete the vacuum chamber operation of the packaging bag to be sealed by pumping a small amount of gas in the vacuum chamber. This vacuum packaging method requires the packaging bag to be placed in the bag placing member after the materials are loaded, which is inconvenient to operate. Therefore, the inventor of the present case continued to develop a bag supporting method based on this packaging equipment. The packaging bag is placed in the bag placing chamber of the bag placing bin, and the first sealing block and the second sealing block located above the bag placing bin are driven to close in the horizontal direction, so that the first sealing block and the second sealing block clamp the packaging bag, and the lower parts of the first sealing block and the second sealing block abut against the upper opening of the bag placing bin to close the bag placing chamber; the vacuum mechanism communicated with the bag placing chamber is driven to extract the gas in the bag placing chamber, so that the packaging bag expands and adheres to the inner wall of the bag placing chamber; the first adsorption unit is driven to adsorb the bag body of the packaging bag; the second adsorption unit located on the side walls of the bag mouth opposite to the first sealing block and the second sealing block is driven to adsorb the side wall of the bag mouth of the packaging bag; the first sealing block and the second sealing block are driven to separate in the horizontal direction, so that the bag mouth of the packaging bag is opened. At this time, the bag mouth can be opened for loading, and direct sealing can be carried out after loading. Although the bag supporting method of this vacuum packaging method solves the problem of quickly opening the bag mouth for loading materials, after the materials are loaded, since the second sealing block and the second sealing block clamp the bag mouth, only direct sealing can be carried out, and the vacuum in the bag body cannot be pumped out.

[0003] In view of this, the inventor of the present case conducted in-depth research on the above problems, and thus this case was born. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a vacuum chamber for packaging that can achieve two-stage vacuum pumping so that the inside of the packaging bag can still be vacuumed after the materials are loaded.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A vacuum chamber for packaging, comprising a bag - placing chamber with a chamber opening and a bag - placing cavity, a sealing block and a vacuum cover that can respectively seal the chamber opening of the bag - placing chamber. The sealing block is located between the vacuum cover and the bag - placing chamber, and the vacuum cover is arranged to be reciprocally movable towards the sealing - block direction. There are two sealing blocks, and the two sealing blocks can be relatively reciprocally moved; at least one of the two sealing blocks has an intermediate sealing block and side sealing blocks respectively located on both sides of the intermediate sealing block. The two side sealing blocks are cooperated with the intermediate sealing block in a way that they can translate relative to the intermediate sealing block. When the two side sealing blocks are in contact with the other sealing block, a through - opening communicating with the bag - placing chamber is formed between the intermediate sealing block and the other sealing block, and the side sealing blocks are closely fitted with the vacuum cover to enclose the bag - placing cavity to form a vacuum chamber; when the side sealing blocks and the intermediate sealing block are jointly in contact with the other sealing block, the bag - placing cavity is enclosed to form a vacuum chamber, and an air - extraction port is provided in the above - mentioned vacuum chamber.

[0007] One of the two sealing blocks is the first sealing block, and the other is the second sealing block. The first sealing block has the above - mentioned intermediate sealing block and the two above - mentioned side sealing blocks. When the two side sealing blocks are in contact with the second sealing block, the above - mentioned through - opening is formed between the intermediate sealing block and the second sealing block. When the two side sealing blocks and the intermediate sealing block are jointly in contact with the second sealing block, the two sealing blocks enclose the bag - placing cavity.

[0008] Both of the two above - mentioned sealing blocks are the first sealing block and the second sealing block. The first sealing block and the second sealing block have the above - mentioned intermediate sealing block and the two above - mentioned side sealing blocks, and the side sealing blocks of the first sealing block and the side sealing blocks of the second sealing block are arranged in one - to - one correspondence. The intermediate sealing block of the first sealing block and the intermediate sealing block of the second sealing block are arranged in opposite positions. When the side sealing blocks of the first sealing block and the side sealing blocks of the second sealing block are in contact with each other in one - to - one correspondence, the above - mentioned through - opening is formed between the intermediate sealing block of the first sealing block and the intermediate sealing block of the second sealing block.

[0009] A moving driving device for driving the side sealing blocks to reciprocate is provided on the above - mentioned intermediate sealing block.

[0010] The above - mentioned moving driving device is a pneumatic device or an electric device.

[0011] Taking the opposite surface of the two sealing blocks as the sealing surface, the plane where the sealing surface of the side sealing block is located protrudes from the plane where the sealing surface of the intermediate sealing block is located.

[0012] Installation convex parts corresponding to the two side sealing blocks are integrally formed on the above - mentioned intermediate sealing block. There is a translation distance for the side sealing blocks to reciprocally translate between the installation convex parts and the side sealing blocks, and a motion driving device for the side sealing blocks to reciprocally move is provided within the above - mentioned translation distance.

[0013] The above - mentioned motion driving device is a pneumatic device.

[0014] The above-mentioned movement driving device is an elastic member tensioned between the mounting bump and the side sealing block.

[0015] It further includes guide rails. The two guide rails are arranged oppositely and extend along the moving direction of the two sealing blocks. The two sealing blocks are slidably mounted on the two guide rails, and the distance between the two guide rails matches the length of the bag placing bin opening.

[0016] After adopting the above technical solution, for a vacuum bin for packaging of the present utility model, during application, the packaging bag is directly placed into the bag placing bin. The two sealing blocks move towards each other and closely adhere together, clamping the bag mouth of the packaging bag. At this time, the two sealing blocks and the bag placing bin form a vacuum chamber. Then, when vacuum pumping is started for the vacuum chamber, the effect of expanding the packaging bag can be achieved. At this time, the vacuum chamber is used for expanding the bag. After that, the two sealing blocks move away from each other, and the sealing blocks use the vacuum suction method to expand the bag mouth of the packaging bag, achieving the vacuum bag expansion effect. Moreover, when the two sealing blocks move towards each other for a certain stroke and do not adhere to form a through port, the vacuum cover moves down and closely adheres to the two sealing blocks. At this time, the vacuum cover, the two sealing blocks and the bag placing bin form a vacuum chamber again. At this time, the bag mouth of the packaging bag is at the through port and is not in a clamped state. In this way, when the vacuum chamber starts vacuum pumping, the chamber inside the packaging bag is vacuum pumped. Compared with the prior art, the entire vacuum bin can form two vacuum chambers for different purposes, with diverse application functions, and has the advantages of simple overall structure and convenient operation. Description of the Drawings

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a schematic structural view of the sealing block in the present utility model;

[0019] Figure 3 is another schematic structural view of the sealing block in the present utility model. Detailed Embodiment

[0020] In order to further explain the technical solution of the present utility model, the following will be elaborated in detail with reference to the drawings.

[0021] A vacuum bin for packaging of the present utility model, as Figure 1 、 2As shown in the figure, it includes a bag placing bin 1 with a hatch and a bag placing cavity, a sealing block and a vacuum cover 2 that can respectively seal the hatch of the bag placing bin. The sealing block is located between the vacuum cover 2 and the bag placing bin 1. The vacuum cover 2 is arranged to be reciprocally movable in the direction of the sealing block. There are two sealing blocks, and the two sealing blocks can be arranged to move relatively reciprocally. In this solution, one side of the opposite sealing blocks has vacuum nozzles for vacuum adsorption. The lower bottom surface of the vacuum cover 2 is recessed upward to form a receiving cavity, and a heat sealing device for sealing is provided in this receiving cavity. The relative movement mode and driving of the two sealing blocks are well-known. The up and down movement mode of the vacuum cover 2 can be driven by a motor or a cylinder.

[0022] At least one of the two sealing blocks has an intermediate sealing block and side sealing blocks respectively located on both sides outside the intermediate sealing block. For example, Figure 2 As shown in the figure, taking the case where both of the two sealing blocks have side sealing blocks on both sides of the intermediate sealing block as an example, one of the two sealing blocks is the first sealing block 31, and the other sealing block is the second sealing block 32. The first sealing block 31 has a first intermediate sealing block 311 and two first side sealing blocks 312. The second sealing block 32 has a second intermediate sealing block 321 and two second side sealing blocks 322. The two first side sealing blocks 312 are cooperated with the first intermediate sealing block 311 in a manner that can translate relative to the first intermediate sealing block 312. The two second side sealing blocks 322 are cooperated with the second intermediate sealing block 321 in a manner that can translate relative to the second intermediate sealing block 321.

[0023] Preferably, the opposite side of the two sealing blocks is the sealing surface, the opposite direction of the two sealing blocks is the front-back direction, the planes where the sealing surfaces of the two first side sealing blocks are located protrude from the plane where the sealing surface of the first middle sealing block is located, and the planes where the sealing surfaces of the two second side sealing blocks are located protrude from the plane where the sealing surface of the second middle sealing block is located. Specifically, the rear end faces of the two first side sealing blocks are located at the rear side of the rear end face of the first middle sealing block, and the front end faces of the two second side sealing blocks are located at the front side of the front end face of the second middle sealing block. A return mechanism for generating a translational restoring force when the first side sealing block translates toward the second sealing block is provided on the first middle sealing block. Correspondingly, a return mechanism for generating a translational restoring force when the second side sealing block translates toward the first sealing block is provided on the second middle sealing block. Preferably, first mounting protrusions 311a corresponding to the two first side sealing blocks 312 are integrally formed on the first middle sealing block 311, and second mounting protrusions 321a corresponding to the two second side sealing blocks 322 are integrally formed on the second middle sealing block 321. A translational spacing for the first side sealing block to translate in the direction away from the sealing surface is provided between the first mounting protrusion 311a and the first side sealing block 312. The return mechanism is provided within this translational spacing, and this return mechanism is an elastic member 4, that is, a spring. Correspondingly, a translational spacing for the second side sealing block to translate in the direction away from the sealing surface is provided between the second mounting protrusion 321a and the second side sealing block 322. An elastic member 4, that is, a spring, is also provided within this translational spacing. During application, the cooperation of the sealing block and the elastic member with this structure enables the reciprocating movement of the two side sealing blocks to be realized by a mechanical structure without the use of electrical components.

[0024] When the two first side sealing blocks 312 and the two second side sealing blocks 322 are in contact with each other, a through opening 100 penetrating up and down is formed between the first middle sealing block 311 and the second middle sealing block 321. This through opening 100 is connected to the warehouse opening of the bag placing bin 1. The length of the through opening 100 matches the length of the warehouse opening of the bag placing bin 1. Moreover, the vacuum cover 2 is closely attached to the two sealing blocks to enclose the bag placing cavity to form a vacuum chamber, that is, the vacuum cover 2 is laminated on the two sealing blocks, and the accommodating cavity of the vacuum cover 2 is aligned with the through opening 100. The bag accommodating cavity of the bag placing bin and the through opening of the vacuum cover and the two sealing blocks enclose a sealed vacuum chamber. When the two first side sealing blocks 312 and the two second side sealing blocks 322 are in contact with each other and the first middle sealing block 321 and the second middle sealing block 322 are in contact with each other, the two sealing blocks close the warehouse opening of the bag placing bin, and the bag placing cavity is a sealed vacuum chamber.

[0025] An air extraction port is provided in the vacuum chamber. Specifically, air holes for air extraction can be opened on the side wall of the bag placing bin.

[0026] In this new type, vacuum nozzles are provided on the first side sealing block and / or the first middle sealing block of the first sealing block, and vacuum nozzles are provided on the second side sealing block and / or the second middle sealing block of the second sealing block.

[0027] During application, the packaging bag is directly placed into the bag placement cavity of the bag placement bin 1, and the bag opening of the packaging bag extends upward out of the bin opening of the bag placement bin 1. The two sealing blocks move towards each other and closely adhere together. The two first side sealing blocks 312 are in contact with the two second side sealing blocks 322, and the first middle sealing block 321 is in contact with the second middle sealing block 322. The bag opening of the packaging bag is clamped, and the elastic member 4 is compressed. At this time, the two sealing blocks seal the bin opening of the bag placement bin, and a vacuum chamber is formed in the bag placement bin of the bag placement bin. At this time, the vacuum chamber is started to be evacuated through the air extraction port, that is, the part of the packaging bag inside the bag placement bin will expand and closely adhere to the inner side wall of the bag placement bin, achieving the effect of expanding the bag. At this time, the vacuum chamber is used for expanding the bag. Then, the two sealing blocks move away from each other, and the vacuum suction nozzles of the sealing blocks start to evacuate. The vacuum suction nozzles suck the two sides of the bag opening of the packaging bag, and the opposite translation of the two sealing blocks expands the bag opening of the packaging bag, achieving the effect of vacuum expanding the bag; when the two sealing blocks move towards each other for a certain stroke, the two first side sealing blocks are in contact with the two second side sealing blocks correspondingly, and the first middle sealing block and the second middle sealing block form a through port. The vacuum cover 2 moves downward and closely adheres to the two sealing blocks. At this time, the vacuum cover, the two sealing blocks and the bag placement bin form a vacuum chamber again. At this time, the bag opening of the packaging bag is at the through port and is not in a clamped state. The part of the packaging bag above the through port is correspondingly in the accommodating cavity of the vacuum cover. At this time, the air extraction port is started, and the vacuum chamber is evacuated again to evacuate the chamber inside the packaging bag. Compared with the prior art, the vacuum bin of this patent can form two vacuum chambers with different uses, that is, the vacuum chamber for expanding the bag and the vacuum chamber for evacuating the air inside the bag, making the uses of the vacuum bin diverse and the application functions diversified, and having the advantages of simple overall structure and convenient operation.

[0028] In this new type, a moving driving device for driving the side sealing block to reciprocate translationally can also be provided within the translation distance, that is, a pneumatic device, and this pneumatic device can be a cylinder. The moving driving device can also adopt an electric device, and this electric device is in the form of motor drive, which is the cooperation of a motor, a gear and a rack.

[0029] In this new type, the sealing surfaces of the two sealing blocks can also adopt a flat straight surface structure, that is, the sealing surfaces of the two first side sealing blocks are flush with the sealing surface of the first middle sealing block, and the sealing surfaces of the two second side sealing blocks are flush with the sealing surface of the second middle sealing block. In this way, the translation of the first side sealing block and the second side sealing block is driven pneumatically or electrically.

[0030] In this new type, preferably, the vacuum chamber further includes guide rails 5. The two guide rails 5 are arranged opposite to each other and extend along the moving direction of the two sealing blocks, that is, the guide rails 5 extend in the front-rear direction. The left and right sides of the two sealing blocks are respectively slidably mounted on the two guide rails 5 through sliders. The distance between the two guide rails 5 matches the length of the opening of the bag placing chamber (i.e., the length in the left-right direction). The guide rails can guide the sliding of the sealing blocks. At the same time, limiting the distance between the two guide rails allows the bag placing chamber 1 to be inserted between the two guide rails 5 and ensure close fit with the sealing blocks.

[0031] In this new type, in order to protect the sealing effect, buffer blocks 6 are installed on the sealing surfaces of the first sealing block and the second sealing block. The buffer blocks 6 can ensure the sealing performance of the vacuum chamber.

[0032] The vacuum chamber of this new type, as Figure 3 shown, may also have only the first sealing block 31 with an intermediate sealing block and two side sealing blocks. The second sealing block 31 is of an integral block structure. The sealing surface of the second sealing block is a flat straight surface. The sealing surfaces of the two side sealing blocks protrude outside the sealing surface of the intermediate sealing block. In this way, when the two side sealing blocks are in contact with the second sealing block, a through port as described above is also formed between the intermediate sealing block and the second sealing block. When the two side sealing blocks and the intermediate sealing block are in contact with the second sealing block together, the two sealing blocks correspondingly close the bag placing cavity, and the same effect is achieved by adopting a three-piece structure with the second sealing block.

[0033] The product form of this utility model is not limited to the illustrations and embodiments in this case. Any person's appropriate changes or modifications with a similar idea should be regarded as not departing from the patent scope of this utility model.

Claims

1. A packaging vacuum chamber, comprising a bagging chamber having a chamber opening and a bagging chamber, and a sealing block and a vacuum cover, each of which can seal the chamber opening of the bagging chamber respectively, wherein the sealing block is located between the vacuum cover and the bagging chamber, the vacuum cover is arranged to be able to reciprocate toward the sealing block, and two sealing blocks are arranged to be able to reciprocate relative to each other; characterized in that: At least one of the two sealing blocks has a middle sealing block and side sealing blocks located outside the middle sealing block on both sides. The side sealing blocks cooperate with the middle sealing block in a manner that they can translate relative to the middle sealing block. When the two side sealing blocks are in contact with the other sealing block, a through opening connected to the bagging bin is formed between the middle sealing block and the other sealing block, and the side sealing blocks are tightly matched with the vacuum cover to close the bagging cavity to form a vacuum chamber; when the side sealing blocks and the middle sealing block are in contact with the other sealing block together, the bagging cavity is closed to form a vacuum chamber, and the vacuum chamber is provided with an exhaust port.

2. A packaging vacuum chamber according to claim 1, characterized in that: One of the two sealing blocks is the first sealing block, and the other sealing block is the second sealing block. The above-mentioned first sealing block has the above-mentioned middle sealing block and the two above-mentioned side sealing blocks. When the two side sealing blocks are in contact with the second sealing block, the above-mentioned through opening is provided between the middle sealing block and the second sealing block. When the two side sealing blocks and the middle sealing block are in contact with the second sealing block together, the two sealing blocks seal the bag placement cavity.

3. A packaging vacuum chamber according to claim 1, characterized in that: The two sealing blocks mentioned above are the first sealing block and the second sealing block, the first sealing block and the second sealing block have the above-mentioned middle sealing block and the two side sealing blocks mentioned above, and the two side sealing blocks of the first sealing block are arranged one by one with the two side sealing blocks of the second sealing block, and the middle sealing block of the first sealing block is arranged relatively with the middle sealing block of the second sealing block, and when the two side sealing blocks of the first sealing block correspond to and abut against the two side sealing blocks of the second sealing block one by one, the middle sealing block of the first sealing block and the middle sealing block of the second sealing block form the above-mentioned through opening.

4. A packaging vacuum chamber according to claim 2 or 3, characterized in that: The middle sealing block is provided with a moving driving device for driving the side sealing blocks to reciprocate.

5. A packaging vacuum chamber according to claim 4, characterized in that: The moving driving device is a pneumatic device or an electric device.

6. A packaging vacuum chamber according to claim 2 or 3, characterized in that: The opposite sides of the two sealing blocks are used as sealing surfaces, and the plane where the sealing surface of the side sealing block is located protrudes from the plane where the sealing surface of the middle sealing block is located.

7. A packaging vacuum chamber according to claim 2 or 3, characterized in that: The middle sealing block is integrally formed with mounting protrusions corresponding to the two side sealing blocks. There is a translational spacing between the mounting protrusions and the side sealing blocks for the side sealing blocks to reciprocate. A motion driving device is provided within the translational spacing to enable the side sealing blocks to reciprocate.

8. A packaging vacuum chamber according to claim 7, characterized in that: The above-mentioned motion driving device is a pneumatic device.

9. The packaging vacuum chamber according to claim 7, characterized in that: The motion driving device is an elastic member tensioned between the mounting protrusion and the side sealing block.

10. The packaging vacuum chamber according to claim 1, characterized in that: It also includes guide rails, which are arranged opposite to each other and extend along the moving direction of the two sealing blocks. The two sealing blocks are slidably installed on the two guide rails, and the distance between the two guide rails matches the length of the bag storage bin opening.

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