A packaging machine

Abstract

The present invention relates to the technical field of packaging machinery, in particular to a packaging machine, comprising a loading area, a packaging area and a unloading area arranged in sequence, wherein the material box in the loading area is sent to the packaging area by a box pushing device for packaging and then sent to the unloading area, wherein the packaging area comprises: a lower mold, wherein the lower mold is provided with a material box cavity; an upper mold, which is arranged above the lower mold and opposite to the lower mold, and the upper mold is provided with a cutter heat-sealing mechanism corresponding to the material box cavity one by one; a film receiving and delivering system for transmission and control of receiving and delivering heat-sealing film, wherein the film receiving and delivering system comprises a film receiving roller and a film delivering roller; a gas replacement mechanism for replacing the gas in the material box; the lower mold and the upper mold clamp the heat-sealing film provided by the film receiving and delivering system, so that a sealed gas replacement space is formed between the heat-sealing film and the lower mold, and the gas in the material box is replaced by the gas replacement mechanism. The present invention can solve the problem of low efficiency of packaging machines in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging machinery, and specifically relates to a packaging machine. Background Art

[0002] Vacuum replacement modified atmosphere packaging machines are the foundation for achieving ideal packaging. They extract air from a container and then refill it with different protective gases based on the type of item, protecting the contents. Existing vacuum replacement modified atmosphere packaging machines have complex structures, low automation levels, and low packaging efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a packaging machine to solve the problem of low efficiency of packaging machines in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solution: a packaging machine comprising a loading area, a packaging area and a unloading area arranged in sequence, wherein the material boxes in the loading area are sent to the packaging area for packaging by a box pushing device and then sent to the unloading area.

[0005] The packaging area includes:

[0006] A lower die, wherein a material box cavity is provided in the lower die;

[0007] An upper die is arranged above the lower die and opposite to the lower die, and a cutter heat sealing mechanism corresponding to the cavities of the material box is configured in the upper die;

[0008] The film delivery system is used for the transmission and control of the film delivery and retraction, and the film delivery system includes a film delivery roller and a film receiving roller;

[0009] A gas replacement mechanism, used to replace the gas in the material box;

[0010] The lower mold and the upper mold clamp the heat-sealing film provided by the film receiving and delivering system, so that a sealed gas replacement space is formed between the heat-sealing film and the lower mold, and the gas in the material box is replaced by the gas replacement mechanism.

[0011] Preferably, a movable plate is movably provided on the upper template of the upper mold, and a film feeding channel is formed between the movable plate and the upper template. Packaging holes corresponding to the material box cavities are opened on the movable plate, and an auxiliary limiting strip is installed in the middle of the side of the movable plate facing the lower mold, and an accommodating groove matching the auxiliary limiting strip is provided on the lower template of the lower mold.

[0012] Preferably, the size of the packaging hole opened on the movable plate is larger than the outer size of the cutter.

[0013] Preferably, the upper template, movable plate and lower template are provided with corresponding through holes of coaxial and same size. When the upper mold and the lower mold are closed, the through holes provided on the upper template, movable plate and lower template are connected.

[0014] Preferably, the lower template of the lower mold is provided with a plurality of material box cavities, each material box cavity is passed through a guide shaft, a support piece is fixed on the guide shaft, and the second driving device drives the lower mold to move up and down along the guide shaft, and the bottom of the guide shaft is fixed on the fixed base plate, and the fixed base plate is connected with an auxiliary limiting member, the auxiliary limiting member includes an auxiliary shaft and a limiting block, one end of the auxiliary shaft is fixedly connected to the fixed base plate, and the limiting block is installed at the other end of the auxiliary shaft, and the lower template is provided with a accommodating opening matching the limiting block.

[0015] Preferably, the lower mold plate and the upper mold plate of the upper mold are provided with corresponding air extraction grooves, and when the lower mold and the upper mold are closed, the air extraction grooves on the lower mold plate and the upper mold plate are connected.

[0016] Preferably, the box pushing device includes:

[0017] Two claws, the two claws are symmetrically arranged on both sides of the packaging area and connected by a connecting plate, each claw is respectively configured with a first linear module and a second linear module, each claw includes at least two slots, when loading, at least one slot corresponds to the loading area, at least one slot corresponds to the packaging area, when unloading, at least one slot corresponds to the packaging area, at least one slot corresponds to the unloading area, the slots limit the material box in the first axial direction, a guide bar is respectively configured in the middle of the loading area and the unloading area, and the claws cooperate with the guide bar to limit the material box in the second axial direction;

[0018] The first linear module is used to control the claw to reciprocate along the first axial direction to grab the material box. The first linear module includes a first cylinder and a connecting member, one end of the connecting member is fixedly connected to the piston rod of the first cylinder, and the other end of the connecting member is fixedly connected to the claw;

[0019] The second linear module is used to control the claw to move back and forth along the second axis to push the material box in and out of the packaging area. The second linear module includes a first motor and a belt. The first motor drives the belt to rotate, and the belt is fixedly connected to the connecting plate.

[0020] Preferably, the cutter heat sealing mechanism comprises:

[0021] A cutter mechanism is used to cut the heat-sealed film and the heat-sealed opening between the heat-sealed film and the material box. The cutter mechanism includes a cutter and an ironing plate. The cutter is movably mounted on the ironing plate.

[0022] The first driving device is used to drive the cutter mechanism to move up and down.

[0023] Preferably, a groove is provided on the material box cavity, a gasket is installed on the groove, the gasket matches the material box, and a groove is also processed on the material box cavity, the groove is processed with an air extraction hole, and the air extraction hole is connected to the gas replacement mechanism.

[0024] Preferably, an oblique groove is provided on the side of the material box cavity, and a plurality of oblique holes are provided on the oblique groove, and the oblique holes are connected to the inflation port independently provided on the lower mold.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the packaging machine provided by the present application adopts a side box pushing device. After the box pushing device pushes the box, it leaves the packaging area from the side, and the packaging area can immediately start packaging work, which greatly improves the working efficiency of the packaging machine. In addition, the box pushing device will push the material box that was last packaged in the packaging area out of the packaging area to complete the unloading action while loading the material, which also improves the working efficiency of the packaging machine; in addition, the present application sets an auxiliary limit strip inside the upper mold or sets an auxiliary limit block inside the lower mold to cooperate with the box pushing device to position the material box, so that the material box can be smoothly pushed in the middle of the mold, and the material box will not stack, which will not affect the operation of the packaging machine, and invisibly improves the working efficiency of the packaging machine; in addition, the present application also optimizes the internal structure of the upper mold and the lower mold, reduces the space that needs to be vacuumed, thereby reducing the vacuuming time and the time for filling protective gas, and further improves the working efficiency of the packaging machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of Example 1;

[0027] Figure 2 A cross-sectional view of the upper mold and the lower mold of Example 1 when separated;

[0028] Figure 3 This is a schematic structural diagram of the upper mold and the lower mold of Example 1;

[0029] Figure 4 A schematic structural diagram of the upper mold and the lower mold of Example 1 from another perspective;

[0030] Figure 5 A cross-sectional view of the upper mold and the lower mold when they are closed in Example 1;

[0031] Figure 6 is a cross-sectional view of the lower mold in Example 1;

[0032] Figure 7 It is a partial cross-sectional view of the upper mold and the lower mold when they are closed in Example 1;

[0033] Figure 8 Schematic diagram of the structure of the box pushing device in Example 1;

[0034] Figure 9This is a structural diagram of Example 2;

[0035] Figure 10 This is an exploded schematic diagram of the lower mold in Example 2;

[0036] Figure 11 is a cross-sectional view of the lower die in Example 2;

[0037] Figure 12 is a cross-sectional view of the upper die in Example 2;

[0038] Figure 13 This is a partial cross-sectional view of the upper mold and the lower mold when they are closed in Example 2. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0042] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] Example 1

[0046] See also Figure 1-8 The present embodiment provides a packaging machine, comprising a loading area 1, a packaging area 2 and a unloading area 3 arranged in sequence on a machine platform 5. The loading area 1 and the unloading area 3 use a common transmission belt 442 to convey the material box 6. The staff or the machine gripper places the material box 6 on the transmission belt 442 of the loading area 1, and then the box pushing device 4 sends it to the packaging area 2 for packaging and then sends it to the unloading area 3.

[0047] Specifically, such as Figure 1-7As shown, the packaging area 2 includes: a lower mold 22, an upper mold 21, a film receiving and sending system 23 and a gas replacement mechanism. The lower mold 22 and the upper mold 21 clamp the heat-sealing film 8 provided by the film receiving and sending system 23, so that a sealed gas replacement space is formed between the heat-sealing film 8 and the lower mold 22, and the gas in the material box 6 is replaced by the gas replacement mechanism. Among them, a plurality of material box cavities 221 are arranged in the lower mold 22, and a guide shaft 222 is installed in each material box cavity 221. A support piece 223 is fixed on the guide shaft 222. The second drive device 224 drives the lower mold 22 to move up and down along the guide shaft 222; the upper mold 21 is arranged above the lower mold 22 and opposite to the lower mold 22. A plurality of cavities 211 are arranged in the upper mold 21. The number of cavities 211 is consistent with the number of material box cavities 221 on the lower mold 22 and corresponds one to one. A cutter heat-sealing mechanism 212 is arranged in each cavity 211, so that each material box cavity 221 is provided with a plurality of cavities 211. The box 6 has a separate cutter heat sealing mechanism 212 for sealing, ensuring the sealing effect of each material box 6; the film receiving and sending system 23 is used for the transmission and control of the heat sealing film 8. The film receiving and sending system 23 includes a film receiving roller 232, a film sending roller 231, and the heat sealing film 8 wound on the film receiving roller 232 and the film sending roller 231 and passing through the upper mold 21 and the lower mold 22. The film receiving roller 232 and the film sending roller 231 are respectively arranged on both sides of the packaging area 2. The film receiving roller 232 rolls up the edge of the heat sealing film 8 remaining after cutting and sealing, and The film feeding roller 231 puts down the heat-sealing film 8 of corresponding length for the next packaging; the gas replacement mechanism includes a vacuum suction channel and an inflation channel for replacing the gas in the material box 6. The upper mold 21 and the lower mold 22 are respectively provided with a vacuum suction channel, and the lower mold 22 is also independently provided with an inflation channel. A groove 2211 is provided on each material box cavity 221, and a gasket 2212 is installed on the groove 2211. The gasket 2212 matches the material box 6. A groove 2213 is also processed on the material box cavity 221, and the groove 2213 is processed with an air extraction channel. Hole 2214, the exhaust hole 2214 is connected to the vacuum suction channel of the lower mold 22. At this time, the inside of the material box 6 can be vacuumed through the exhaust hole 2214. At the same time, the vacuum suction channel on the lower mold 22 is also connected to the material box cavity 221, and the lower part of the material box 6 can be vacuumed. Since only the cavity 211 and the corresponding vacuum suction channel are left in the upper mold 21, and only the material box cavity 221 and the corresponding vacuum suction channel are left in the lower mold 22, only the minimum space is left in the upper and lower molds 22, which minimizes the vacuuming time, thereby making the machine more efficient.

[0048] In this embodiment, a movable plate 214 is movably provided on the upper template 213 of the upper mold 21, and a film feeding channel is formed between the movable plate 214 and the upper template 213. Packaging holes 2141 corresponding to the material box cavity 221 are opened on the movable plate 214, and an auxiliary limiting strip 2142 is installed in the middle of the side of the movable plate 214 facing the lower mold 22. The lower template 225 of the lower mold 22 is provided with an accommodating groove 2251 matching the auxiliary limiting strip 2142. This not only provides an auxiliary support surface for the material box 6 to make the box pushing smooth, but also allows the heat-sealing film 8 to pass over the movable plate 214 without interfering with each other.

[0049] Preferably, Figure 7 As shown, coaxial through holes of the same size are correspondingly opened on the upper template 213, the movable plate 214, and the lower template 225. The first through hole 2131 on the upper template 213, the second through hole 2143 on the movable plate 214, and the third through hole 2252 on the lower template 225 form a vacuum suction channel. When the upper and lower molds 22 are closed and vacuumed, the upper and lower molds 22 are placed in the same vacuumed space. This ensures that there is no pressure difference when vacuuming, which is conducive to smooth operation. Preferably, multiple such through holes can be provided to facilitate rapid vacuuming and improve the efficiency of the machine.

[0050] Preferably, an inclined groove 2215 is provided on the side of the material box cavity 221, and a plurality of inclined holes 2216 are provided on the inclined groove 2215. The inclined holes 2216 are connected to the inflation port 226 independently provided on the lower mold 22 through the transition hole 2217. In this way, the injected gas can pass directly to the top of the material box 6, and the box space can be filled first during inflation, thereby increasing the inflation speed.

[0051] Specifically, the cutter heat sealing mechanism 212 includes: a cutter mechanism and a first drive device 2126, wherein the cutter mechanism is used to cut the heat sealing film 8 and the heat sealing end of the heat sealing film 8 and the material box 6, the cutter mechanism includes a cutter 2121 and an ironing plate 2122, the cutter 2121 is movably positioned and installed on the ironing plate 2122 through a positioning pin 2123 and a spring 2124, and the ironing plate 2122 is fixedly installed on the movable connecting plate 2127 of the first drive device 2126, and the movable connecting plate 2127 drives the cutter 2121 and the ironing plate 2122 to rise and fall when the movable connecting plate 2127 rises and falls.

[0052] Specifically, when cutting, the cutter mechanism passes through the packaging hole 2141 on the movable plate 214, wherein the length of the knife holder plate 2125 that fixes the cutter 2121 is greater than the opening length of the packaging hole 2141 on the movable plate 214, thus forming a limit on the cutting position of the cutter 2121. When the cutter 2121 is at a certain position, the cutter 2121 stops cutting due to the limit of the knife holder plate 2125 and the movable plate 214. In addition, since the cutter 2121 is movably mounted on the ironing board 2122, when the cutter 2121 stops cutting, the ironing plate 2122 will continue to move, heat-sealing the heat-sealing film 8 and the material box 6. This setting allows the cutter 2121 to stay on the material box 6 and not cut the material box 6. Furthermore, the outer dimensions of the cutter 2121 are set to be smaller than the size of the material box 6. The size of the heat-sealing film 8 cut will be smaller than the size of the material box 6. When the heat-sealing film 8 is sealed on the material box 6, it will be smaller than the size of the material box 6, forming an inner cutting method, which looks more beautiful. Furthermore, in order to ensure a good film cutting effect, the size of the packaging hole 2141 opened on the movable plate 214 is set to be larger than the outer dimensions of the cutter 2121. The film pressing position can be very close to the position of the cutter 2121, and the best film cutting effect can be achieved.

[0053] Specifically, such as Figure 1 and Figure 8 As shown, the box pushing device 4 includes: at least one claw 41. In this embodiment, two claws 41 are provided. The two claws 41 are symmetrically arranged on both sides of the packaging area 2 and connected by a connecting plate. The claw 41 includes at least two slots 42. When loading, at least one slot 42 corresponds to the loading area 1, and at least one slot 42 corresponds to the packaging area 2. When unloading, at least one slot 42 corresponds to the packaging area 2, and at least one slot 42 corresponds to the unloading area 3. Each claw 41 is respectively configured with a first linear module 43 and a second linear module 44, wherein the first linear module 43 is used to control the claw 41 to move back and forth along the first axis to grab the material box 6, and the second linear module 44 is used to control the claw 41 to move back and forth along the first axis to grab the material box 6, and the second linear module 44 is used to control the claw 41 to move back and forth along the first axis to grab the material box 6. The claw 41 is controlled to move back and forth along the second axis to push the material box 6 in and out of the packaging area 2. After loading is completed, the first module first controls the claw 41 along the first axis (Y) to leave the material box 6 and leave the packaging area 2 to prevent the claw 41 from interfering with the packaging device action in the packaging area 2. The claw 41 only needs to exit the packaging area 2 from the side first, and the packaging area 2 can proceed to the next step. The claw 41 exits from the side of the packaging area 2, the pushing distance is very short, and the time is very fast. Then the second module can drive the claw 41 to reset. At this time, the packaging area 2 performs the packaging action. After the packaging and the claw 41 are reset, the above packaging process can be recirculated, thereby realizing non-stop operation of the production line and significantly improving production efficiency.

[0054] Specifically, the first linear module 43 and the second linear module 44 are mounted above the machine 5, wherein the first linear module 43 includes a first cylinder 431 and a connecting member 432, one end of the connecting member 432 is fixedly connected to the piston rod of the first cylinder 431, and the other end of the connecting member 432 is fixedly connected to the claw 41. When the first cylinder 431 is pushed out, the connecting member 432 moves together with the claw 41 along the first axial direction (Y) toward the outside of the machine 5 and is pushed out of the packaging area 2. When the first cylinder 431 is retracted, the connecting member 432 moves together with the claw 41 toward the packaging area 2. By moving inside the loading area 2, the material box 6 can be grabbed. The second linear module 44 includes a first motor 441 and a belt 442. The first motor 441 drives the belt 442 to rotate, and the belt 442 is fixedly connected to the connecting plate. When the belt 442 rotates, it drives the connecting plate and the claws 41 on both sides thereof to move along the second axial direction (X) to push out the material box 6. Each time an unpacked material box 6 is pushed from the loading area 1, the packed material box 6 in the packaging area 2 is sent out at the same time, and the loading and unloading are completed at the same time, which greatly improves the working efficiency of the packaging machine.

[0055] In this embodiment, two claws 41 are provided, and each claw 41 is evenly distributed with seven slots 42. Thus, a claw 41 can position six rows of magazines 6. Of course, in other embodiments, the number of slots 42 can be increased to push more magazines 6. Due to the presence of the slots 42, the magazines 6 are limited in the second axial direction (X) when they are fed in and pushed out. Preferably, a guide bar 7 is respectively provided between the loading area 1 and the unloading area 3. When the magazines 6 are grabbed, the claws 41 cooperate with the guide bar 7 to limit the magazines 6 in the first axial direction (Y). In this way, the magazines 6 are limited in both directions, so that the magazines 6 are positioned in a planar space. There will be no stacking during loading and unloading, which will not affect the normal operation of the packaging machine. In addition, due to the planar space positioning, the packaging machine provided by this embodiment no longer requires the magazines 6 to be of the same height. As long as the planar box shape of the magazines 6 is consistent, magazines 6 of different heights can be mixed and packaged without affecting the normal use of the packaging machine.

[0056] The working process of the packaging machine provided in this embodiment is as follows: the conveyor belt 442 of the loading area 1 conveys the material box 6 toward the packaging area 2, the claw 41 on the box pushing device 4 grabs the material box 6 in the loading area 1, and at the same time, the claw 41 also grabs the material box 6 that has been packaged in the packaging area 2, the box pushing device 4 pushes the material box 6 in the loading area 1 into the packaging area 2, and at the same time, the material box 6 that was packaged in the packaging area 2 last time is also pushed into the unloading area 3; the first linear module 43 drives the claw 41 to move to the side of the packaging area 2, leaving the packaging area 2, and at the same time, the packaging area 2 starts to package the material box 6, that is, the film receiving and delivering system 23 delivers the heat-sealing film 8, and the material box 6 enters the lower template 225 of the lower mold 22 to position the lower support piece 223 The second driving device 224 drives the lower template 225 to rise, and the material box 6 falls into the material box cavity 221. The lower template 225 continues to rise, so that the heat-sealing film 8 is pressed tightly against the upper template 213 to form a closed space. The upper film and the lower mold 22 are vacuumed at the same time to put the material box 6 in a vacuum state. Then, protective gas is filled into the lower mold 22 to fill the material box 6 with protective gas. Then, the cutter heat-sealing mechanism 212 in the upper mold 21 descends to complete the film cutting and the heat-sealing film 8 is sealed on the material box 6. When the packaging area 2 completes the packaging, the second linear module 44 drives the claw 41 to reset. After the packaging is completed and the claw 41 is reset, the above packaging process can be cycled again.

[0057] Example 2

[0058] See also Figure 9-13 The present embodiment provides a packaging machine, comprising a loading area 1', a packaging area 2' and a unloading area 3' arranged in sequence on a machine platform 5'. The loading area 1' and the unloading area 3' use a common transmission belt to convey a material box 6'. A worker or a machine gripper places the material box 6' on the transmission belt of the loading area 1', and then the box pushing device 4' sends it to the packaging area 2' for packaging and then sends it to the unloading area 3'.

[0059] The difference between this embodiment and the first embodiment lies in the structure of the upper mold 21' and the lower mold 22', wherein a plurality of material box cavities 221' are configured in the lower template 225' of the lower mold 22', and a guide shaft 222' is installed in each material box cavity 221'. A supporting piece 223' is fixed on the guide shaft 222', and a second driving device drives the lower mold 22' to move up and down along the guide shaft 222'. The bottom of the guide shaft 222' is fixed on the fixed bottom plate 228', and the fixed bottom plate 228' is fixedly connected to the machine table 5'. An auxiliary limiting member is connected above the fixed bottom plate 228'. The auxiliary limiting member The positioning member includes an auxiliary shaft 227' and a limit block 229'. One end of the auxiliary shaft 227' is fixedly connected to the fixed base plate 228'. The limit block 229' is installed at the other end of the auxiliary shaft 227'. The lower template 225' is provided with a receiving port 2251' that matches the limit block 229'. Further, a sealing ring is provided on the guide shaft 222' and the auxiliary shaft 227'. Each guide shaft 222' is also provided with a matching guide sleeve. Further, a groove 2211' is provided on each material box cavity 221', and a gasket 2212 is installed on the groove 2211'. ', the gasket 2212' matches the material box 6', the material box cavity 221' is also processed with a groove 2213', the groove 2213' is processed with an air extraction hole 2214', and the air extraction hole 2214' is connected to the vacuum suction channel of the lower mold 22'; a plurality of cavities 211' are provided in the upper mold 21', and the number of cavities 211' is consistent with the number of material box cavities 221' on the lower mold 22' and corresponds one to one, and a cutter heat sealing mechanism 212' is configured in each cavity 211', and the cutter heat sealing mechanism 212' includes: a cutter mechanism and a first drive device, wherein the cutter mechanism The cutter mechanism is used for cutting the heat-sealing film 8' and the heat-sealing end of the heat-sealing film 8' and the material box 6', and includes a cutter 2121' and an ironing plate 2122'. The cutter 2121' is movably positioned on the ironing plate 2122' by a positioning pin 2123' and a spring 2124'. The ironing plate 2122' is fixedly mounted on a movable connecting plate of the first driving device. When the movable connecting plate is raised or lowered, the cutter 2121' and the ironing plate 2122' are driven to rise or fall. In this way, each material box 6' has a separate cutter heat-sealing mechanism 212' for sealing, thereby ensuring the sealing effect of each material box 6'. In this embodiment, the interior of the material box 6' can be vacuumed through the exhaust hole 2214', and at the same time, the vacuum suction channel on the lower mold 22' is also connected to the material box cavity 221', so that the lower part of the material box 6' can be vacuumed. Since only the cavity 211' and the corresponding vacuum suction channel are left in the upper mold 21', and only the material box cavity 221' and the corresponding vacuum suction channel are left in the lower mold 22', only the minimum space is left in the upper and lower molds, which minimizes the vacuuming time, thereby making the machine more efficient.

[0060] Specifically, the auxiliary stoppers are arranged in pairs, facing each other, in the middle of the fixed base plate 228'. The number of auxiliary stoppers matches the number of the cartridge cavities 221'. The stopper surfaces of the stoppers 229' face the cartridge cavities 221'. When grasping the cartridge 6', the lower mold 22' is not driven upward by the second drive mechanism, and the stoppers 229' protrude from the cartridge cavities 221'. The stoppers 229' provide an auxiliary support surface for the cartridge 6', ensuring smooth material feeding and preventing material stacking during loading and unloading, thereby preventing normal operation of the packaging machine. In this embodiment, the heat-sealing film 8' passes over the stoppers 229'. When the second driving device drives the lower mold 22' to rise, the limit block 229' will enter the accommodating port 2251' and be lower than the groove 2213' of the material box cavity 221', that is, the top plane position of the limit block 229' is lower than the blade of the cutter 2121'. In this way, the cutter heat sealing mechanism 212' will not hit the limit block 229' when cutting down, the cutter 2121' will not be damaged, and the cutter 2121' will not damage the material box 6'.

[0061] Preferably, exhaust grooves are correspondingly provided on the lower template 225' and the upper template 213' of the upper mold 21', wherein the exhaust groove on the lower template 225' is the first exhaust groove 2252', and the exhaust groove on the upper template 213' is the second exhaust groove 2131'. When the lower mold 22' and the upper mold 21' are closed, the first exhaust groove 2252' and the second exhaust groove 2131' are connected. When the upper and lower molds are closed and vacuumed, the upper and lower molds are in the same vacuumed space. In this way, there is no pressure difference when the upper and lower vacuum chambers are vacuumed, which is conducive to smooth operation.

[0062] Preferably, a plurality of such vacuum grooves can be provided, which is conducive to rapid vacuuming and improves the efficiency of the machine.

[0063] Preferably, an inclined groove 2215' is provided on the side of the material box cavity 221', and a plurality of inclined holes 2216' are provided on the inclined groove 2215'. The inclined holes 2216' are connected with an independently provided inflation port 226' on the lower mold 22' through a transition hole. The inflation port 226' is not connected with the vacuum channel, but is connected with an external inflation pipeline to form a separate inflation channel. In this way, when charging the protective gas, the gas can go directly to the top of the material box 6', fill the box space first, and increase the inflation speed.

[0064] The packaging machine provided by the present application adopts a side box pushing device. After the box pushing device pushes the box, it leaves the packaging area from the side, and the packaging area can immediately start packaging work, which greatly improves the working efficiency of the packaging machine. In addition, the box pushing device will push the material box that was last packaged in the packaging area out of the packaging area to complete the unloading action while loading the material, which also improves the working efficiency of the packaging machine; in addition, the present application sets an auxiliary limit strip inside the upper mold or sets an auxiliary limit block inside the lower mold to cooperate with the box pushing device to position the material box, so that the material box can be smoothly pushed in the middle of the mold, and the material boxes will not stack, which will not affect the operation of the packaging machine, and invisibly improves the working efficiency of the packaging machine; in addition, the present application also optimizes the internal structure of the upper mold and the lower mold, reduces the space that needs to be vacuumed, thereby reducing the vacuuming time and the time for filling protective gas, and further improves the working efficiency of the packaging machine.

[0065] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A packaging machine, comprising a loading area, a packaging area and a unloading area arranged in sequence, wherein the material boxes in the loading area are sent to the packaging area for packaging by a box pushing device and then sent to the unloading area, characterized in that: The packaging area includes: A lower die, wherein a material box cavity is provided in the lower die; An upper die is arranged above the lower die and opposite to the lower die, and a cutter heat sealing mechanism corresponding to the cavities of the material box is configured in the upper die; The film delivery system is used for the transmission and control of the film delivery and retraction, and the film delivery system includes a film delivery roller and a film receiving roller; A gas replacement mechanism, used to replace the gas in the material box; The lower mold and the upper mold clamp the heat-sealing film provided by the film-receiving and conveying system, so that a sealed gas replacement space is formed between the heat-sealing film and the lower mold, and the gas replacement mechanism replaces the gas in the material box; A movable plate is movably provided on the upper template of the upper mold, a film feeding channel is formed between the movable plate and the upper template, packaging holes corresponding to the material box cavities are opened on the movable plate, an auxiliary limiting strip is installed in the middle of the side of the movable plate facing the lower mold, and an accommodating groove matching the auxiliary limiting strip is provided on the lower template of the lower mold; The lower template of the lower mold is provided with a plurality of material box cavities, each of which is provided with a guide shaft, a support piece is fixed on the guide shaft, and a second driving device drives the lower mold to move up and down along the guide shaft, the bottom of the guide shaft is fixed to the fixed base plate, and the fixed base plate is connected to an auxiliary limiting member, the auxiliary limiting member includes an auxiliary shaft and a limiting block, one end of the auxiliary shaft is fixedly connected to the fixed base plate, and the limiting block is installed at the other end of the auxiliary shaft, and the lower template is provided with an accommodating opening matching the limiting block; The size of the packaging hole provided on the movable plate is larger than the outer size of the cutter; The upper template, the movable plate and the lower template are provided with corresponding through holes of the same axis and size. When the upper mold and the lower mold are closed, the through holes provided on the upper template, the movable plate and the lower template are connected. The lower mold plate and the upper mold plate are provided with exhaust grooves respectively, and when the lower mold and the upper mold are closed, the exhaust grooves on the lower mold plate and the upper mold plate are connected; The box pushing device comprises: Two claws, the two claws are symmetrically arranged on both sides of the packaging area and connected by a connecting plate, each claw is respectively configured with a first linear module and a second linear module, each claw includes at least two slots, when loading, at least one slot corresponds to the loading area, at least one slot corresponds to the packaging area, when unloading, at least one slot corresponds to the packaging area, at least one slot corresponds to the unloading area, the slots limit the material box in the first axial direction, a guide bar is respectively configured in the middle of the loading area and the unloading area, and the claws cooperate with the guide bar to limit the material box in the second axial direction; The first linear module is used to control the claw to reciprocate along the first axial direction to grab the material box. The first linear module includes a first cylinder and a connecting member, one end of the connecting member is fixedly connected to the piston rod of the first cylinder, and the other end of the connecting member is fixedly connected to the claw; The second linear module is used to control the claw to reciprocate along the second axial direction to push the material box into and out of the packaging area. The second linear module includes a first motor and a belt. The first motor drives the belt to rotate, and the belt is fixedly connected to the connecting plate. The cutter heat sealing mechanism comprises: A cutter mechanism is used to cut the heat-sealed film and the heat-sealed opening between the heat-sealed film and the material box. The cutter mechanism includes a cutter and an ironing plate. The cutter is movably mounted on the ironing plate. A first driving device is used to drive the cutter mechanism to move up and down; The cartridge cavity is provided with a groove, a gasket is installed on the groove, the gasket matches the cartridge, the cartridge cavity is further provided with a groove, the groove is provided with an air extraction hole, and the air extraction hole is connected to the gas replacement mechanism; An oblique groove is provided on the side of the material box cavity, and a plurality of oblique holes are provided on the oblique groove. The oblique holes are communicated with an inflation port independently provided on the lower mold.

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