Film feeding system for modified atmosphere packaging machine

Abstract

The utility model provides a film feeding system for a modified atmosphere packaging machine, which relates to the technical field of modified atmosphere packaging machines and comprises a shell, a packaging box moving device, a jacking device, a lower die and an upper die. The jacking device is fixed on the shell; the lower die is detachably fixed on the jacking device; the upper die is detachably fixed on the shell; the upper die is fixed on the shell, and when the lower die is fixed on the jacking device, the upper die is positioned vertically above the lower die; the jacking device can move the lower die in the vertical direction; in the process that the jacking device moves the lower die in the vertical direction, the packaging box moving device can move the packaging box to the lower die. According to the film feeding system for the modified atmosphere packaging machine, the problem that in the prior art, the types of packaging boxes capable of being packaged by a modified atmosphere packaging machine are few is solved, and the types of packaging boxes capable of being packaged by a single modified atmosphere packaging machine can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of modified atmosphere packaging machines, in particular to a film loading system for modified atmosphere packaging machines. Background Art

[0002] A modified atmosphere packaging machine is a specialized device used to preserve food. It vacuums the sealed packaging mold cavity, then fills it with a preservative gas created by mixing two or three gases (such as nitrogen, oxygen, and carbon dioxide) using a built-in mixer. The machine then performs heat sealing and film cutting to deliver the finished product in a fresh-keeping package. This technology effectively extends the shelf life of food, preserving its freshness and taste.

[0003] In the prior art, for example, Chinese patent application No. 201110060116.0 discloses a continuous box-type modified atmosphere packaging machine, which explains the specific working principle of a modified atmosphere packaging machine.

[0004] The film feeding system of the modified atmosphere packaging machine can continuously provide a flattened sealing film with a horizontal film surface. The sealing film with a horizontal film surface moves to between the lower die and the upper die. The packaging box is provided to the lower die by the packaging box moving device. The lower die is provided with a cavity for positioning the packaging box. The moving device can position the packaging box in the cavity of the lower die. The bottom of the lower die is provided with an electric cylinder that can move vertically. The electric cylinder drives the lower die to move vertically upward until the lower die contacts the upper die and stops. The sealing film between the upper die and the lower die is squeezed to be tightly sealed with the lower die. Due to the outer ring of the upper die The spring continuously provides pressure to the sealing film in the direction of the lower mold, forming a closed space between the sealing film and the cavity of the lower mold. After the gas replacement is completed in this closed space, a heat sealing device (such as a heat sealing device for packaging equipment disclosed in Chinese patent application No. 201120162883.8) is used to seal the sealing film and the packaging box. After sealing, the remaining part of the sealing film is cut off, and finally the lower mold is driven vertically downward by the electric cylinder, and the packaging box moving device moves the sealed packaging box away from the lower mold cavity, thereby completing the film-applying operation of a packaging box.

[0005] However, the existing modified atmosphere packaging machines can only seal and package one type of packaging box. For merchants, there are two ways to seal and package all their products. The first method is to unify all the packaging boxes into one type, so that only one modified atmosphere packaging machine is needed. Using the same packaging box for different products may result in a waste of packaging box capacity. For example, a bento with two dishes and a bento with three dishes require different packaging boxes, and only one modified atmosphere packaging machine can be used, which will force merchants to put two dishes in a packaging box that can store three dishes, leaving a grid empty; the second method is to purchase modified atmosphere packaging machines of different specifications to seal packaging boxes of different specifications. For merchants with low packaging volume requirements but a large variety of items and requiring packaging boxes of different specifications, this method is not applicable, and this will cause merchants to bear more costs for purchasing, operating, storing and maintaining modified atmosphere packaging machines. Utility Model Content

[0006] In order to solve the above technical problems, the present invention provides a film loading system for a modified atmosphere packaging machine, which can increase the types of packaging boxes that can be packaged by a single modified atmosphere packaging machine.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides a film upper system for a modified atmosphere packaging machine, comprising a shell, a packaging box moving device, a lifting device, a lower mold and an upper mold; the lifting device is fixed to the shell; the lower mold is detachably fixed to the lifting device; the upper mold is detachably fixed to the shell; when the upper mold is fixed to the shell and the lower mold is fixed to the lifting device, the upper mold is vertically above the lower mold; the lifting device can move the lower mold in the vertical direction; when the lifting device moves the lower mold in the vertical direction, the packaging box moving device can move the packaging box onto the lower mold.

[0009] The utility model provides an upper film system for a modified atmosphere packaging machine, preferably, the upper mold includes a fixed plate, a first spring assembly, a first pressure plate, a second spring assembly and a second pressure plate; a horizontal guide rail is provided in the shell; the fixed plate can be slidably fixed on the horizontal guide rail; the first pressure plate is fixed to the lower bottom surface of the fixed plate by the first spring assembly; the second pressure plate is fixed to the lower bottom surface of the fixed plate by the second spring assembly; when not squeezed by external force, the height of the lower bottom surface of the first pressure plate is lower than the height of the lower bottom surface of the second pressure plate; a through hole is provided on the surface of the first pressure plate in a vertical direction; the second pressure plate can be slidably fixed in the through hole; during the sliding process of the second pressure plate relative to the through hole of the first pressure plate, the second pressure plate seals the through hole of the first pressure plate.

[0010] The film-loading system for the modified atmosphere packaging machine provided by the present invention preferably also includes a lifting plate assembly; the lifting device includes a plurality of electric cylinders and lifting plates; the telescopic end of the electric cylinder is arranged to move in the vertical direction; the lifting plate is fixed to the telescopic end of the electric cylinder; the lower mold is detachably fixed to the lifting plate; the lifting plate assembly is fixed to the shell; a lifting hole is provided on the surface of the lifting plate in the vertical direction; the lifting plate assembly is fixed through the lifting hole; when the lifting plate moves in the vertical direction, the lifting plate assembly seals the lifting hole.

[0011] The utility model provides a film-loading system for a modified atmosphere packaging machine, preferably, the packaging box moving device includes a horizontal moving device and a plurality of positioning baffles; the horizontal moving device includes a first guide rail, a first slider assembly, a second guide rail and two second slider assemblies; the first slider assembly can be slidably fixed on the first guide rail; the second guide rail is fixed on the first slider assembly; the second slider assembly can be slidably fixed on the second guide rail; the extension direction of the first guide rail and the second guide rail is a straight line; the extension direction of the first guide rail and the second guide rail is perpendicular; one positioning baffle is detachably fixed to each of the two second slider assemblies; the positioning baffle is provided with a plurality of grooves for abutting and positioning the packaging box.

[0012] The utility model provides a film upper system for a modified atmosphere packaging machine, preferably, a plurality of first fixing holes are opened on the fixing plate; a plurality of quick locking pins adapted to the first fixing holes are provided on the horizontal guide rail; when the upper mold is fixed on the shell, all the quick locking pins correspond to the first fixing holes respectively.

[0013] The utility model provides a film upper system for a modified atmosphere packaging machine, preferably, a plurality of quick locks are provided on the lifting plate; a plurality of second fixing holes are opened at the bottom of the lower mold; when the lower mold is fixed on the lifting plate, the quick locks can be respectively inserted into each of the second fixing holes for fixing.

[0014] The utility model provides a film-loading system for a modified atmosphere packaging machine, preferably, the second slider assembly is provided with a plurality of vertically extending positioning pins; the positioning baffle is provided with a plurality of third fixing holes; when the positioning baffle is fixed to the second slider assembly, the positioning pins are respectively inserted into each of the third fixing holes.

[0015] The film-loading system for the modified atmosphere packaging machine provided by the present invention preferably also includes a plum blossom bolt; the second slider assembly and the positioning baffle are respectively provided with a fourth fixing hole; when the positioning baffle is fixed to the second slider assembly, the plum blossom bolt can be simultaneously inserted into and fixed to the fourth fixing holes on the second slider assembly and the positioning baffle.

[0016] The present invention provides a film-uppering system for a modified atmosphere packaging machine, which relates to the technical field of modified atmosphere packaging machines and includes a housing, a packaging box moving device, a lifting device, a lower mold, and an upper mold; the lifting device is fixed to the housing; the lower mold is detachably fixed to the lifting device; the upper mold is detachably fixed to the housing; when the upper mold is fixed to the housing and the lower mold is fixed to the lifting device, the upper mold is vertically above the lower mold; the lifting device can move the lower mold in the vertical direction; when the lifting device moves the lower mold in the vertical direction, the packaging box moving device can move the packaging box onto the lower mold. The film-uppering system for a modified atmosphere packaging machine provided by the present invention solves the problem of the limited number of packaging boxes that can be packaged by a modified atmosphere packaging machine in the prior art, and can increase the number of packaging boxes that can be packaged by a single modified atmosphere packaging machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention and its features, features, configurations, and advantages will become more apparent upon reading the detailed description of the following non-limiting embodiments with reference to the accompanying drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0018] Figure 1 This is a structural diagram of the film-loading system for the modified atmosphere packaging machine provided in Example 1 of the present invention as a structural part of the modified atmosphere packaging machine.

[0019] Figure 2 This is a schematic diagram of the upper mold structure of the upper film system for the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0020] Figure 3 This is a structural schematic diagram of the connection relationship between the lower mold and the lifting device of the upper film system of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0021] Figure 4 This is a structural schematic diagram of a packaging box moving device for a film loading system of a modified atmosphere packaging machine provided in Example 1 of the present invention.

[0022] Figure 5 This is a schematic diagram of the position structure of the quick locking pin and the quick locking device of the film upper system of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0023] Figure 6 This is a schematic diagram of the connection structure of the quick locking pin and the first fixing hole of the upper film system of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0024] Figure 7This is a schematic diagram of the lower mold structure of the upper film system for the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0025] Figure 8 This is a schematic diagram of the exploded structure after the positioning baffle and the second slider assembly of the upper film system of the modified atmosphere packaging machine provided in Example 1 of the present invention are connected. DETAILED DESCRIPTION

[0026] The following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. It is obvious that the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0027] Example 1: In the prior art, a modified atmosphere packaging machine can only package one type of packaging box. For users with a small packaging volume and a large variety of goods, which leads to a large number of packaging box types, it is necessary to use multiple different modified atmosphere packaging machines to package different packaging boxes respectively. This requires users to prepare multiple modified atmosphere packaging machines of different specifications, thereby increasing the purchase and maintenance costs of the modified atmosphere packaging machines. To solve this problem, the film-loading system for the modified atmosphere packaging machine provided in Example 1 of the present invention is as follows: Figures 1 to 8 As shown, it includes a shell 1, a packaging box moving device 2, a lifting device 3, a lower mold 4 and an upper mold 5; the lifting device 3 is fixed on the shell 1; the lower mold 4 is detachably fixed on the lifting device 3; the upper mold 5 is detachably fixed on the shell 1; when the upper mold 5 is fixed on the shell 1 and the lower mold 4 is fixed on the lifting device 3, the upper mold 4 is vertically above the lower mold 4; the lifting device 3 can move the lower mold 4 in the vertical direction; when the lifting device 3 moves the lower mold 4 in the vertical direction, the packaging box moving device 2 can move the packaging box to the lower mold 4.

[0028] The modified atmosphere packaging machine is a prior art. As disclosed in the comparative document provided in the background technology, the specific structure and working principle of a modified atmosphere packaging machine have been disclosed. The modified atmosphere packaging machine mainly includes three major systems: one is the film supply system, the second is the film upper system, and the third is the conveyor belt. First, the conveyor belt moves the packaging box to the upper film system, and the film supply system moves the sealing film to the upper film system. Then, the upper film system performs the film upper operation on the sealing film and the packaging box. The upper film system for the modified atmosphere packaging machine provided in Example 1 of the present invention is an improvement on the upper film system of the modified atmosphere packaging machine. The existing upper film system moves the sealing film to the top of the lower mold 4 provided in this embodiment and to the bottom of the upper mold 5. At the same time, the existing conveyor belt moves the packaging box to the packaging box moving device 2 provided in this embodiment. The packaging box is accurately positioned between the lower mold 4 and the upper mold 5 by the packaging box moving device 2. At this time, the lower mold is lifted by the lifting device 3. 4 is lifted up together with the packaging box on the lower mold 4. After the lower mold 4 and the upper mold 5 are pressed against each other, a closed space is formed for ventilation, and heat sealing and film cutting between the sealing film and the packaging box are performed. (After the upper mold 5 and the lower mold 4 are pressed against each other, ventilation, heat sealing and film cutting are all disclosed in the prior art, such as the pull-out sealing mold for modified atmosphere packaging disclosed in Chinese patent application No. 202121262756.5, which will not be described in detail here). Different from the prior art, since the upper mold 5 and the lower mold 4 are used to position, heat seal and cut the packaging box during the film application process, the upper mold 5 and the lower mold 4 in this embodiment are both detachable. Therefore, using the equipment provided by this embodiment, for packaging boxes of different specifications, it is only necessary to replace the upper mold 5 and the lower mold 4 to achieve film application operations for different packaging boxes. Therefore, the equipment provided by this embodiment has a wide range of applications.

[0029] The film loading system for a modified atmosphere packaging machine provided in Example 1 of the present invention solves the problem that the modified atmosphere packaging machine can package a limited number of packaging boxes, and can increase the number of packaging boxes that can be packaged by a single modified atmosphere packaging machine.

[0030] In order to specifically realize the replacement of the upper mold 5 from the entire upper mold system, in this embodiment, the upper mold 5 includes a fixed plate 51, a first spring assembly 52, a first pressure plate 53, a second spring assembly 54 and a second pressure plate 55; a horizontal guide rail 11 is provided in the shell 1; the fixed plate 51 can be slidably fixed on the horizontal guide rail 11; the first pressure plate 53 is fixed to the lower bottom surface of the fixed plate 51 through the first spring assembly 52; the second pressure plate 53 is fixed to the lower bottom surface of the fixed plate 51 through the second spring assembly 54; when not squeezed by external force, the height of the lower bottom surface of the first pressure plate 53 is lower than the height of the lower bottom surface of the second pressure plate 55; a through hole 531 is opened on the surface of the first pressure plate 53; the second pressure plate 55 can be slidably fixed in the through hole 531; during the sliding process of the second pressure plate 55 relative to the through hole 531 of the first pressure plate 53, the second pressure plate 55 seals the through hole 531 of the first pressure plate 53. The structure of the upper mold 5 of this embodiment is similar to that of the prior art, such as the semi-automatic four-cavity modified atmosphere packaging machine disclosed in Chinese patent application No. 202323111802.3. The difference is that the upper mold 5 in this embodiment includes a fixed plate 51, which can be slidably fixed in the horizontal guide rail 11 provided on the shell 1, which can facilitate the disassembly and assembly of the upper mold 5 compared to the shell 1. After the upper mold 5 is fixed on the shell 1, the lower mold 4 needs to be lifted twice in succession. After the packaging box is set on the lower mold 4, the lower mold 4 is first moved vertically upward to the middle position, so that the upper surface of the lower mold 4 is in close contact with the lower bottom surface of the first pressing plate 53. At this time, the upper surface of the lower mold 4 is in close contact with the sealing film, and the cavity of the lower mold 4 is used to accommodate the packaging box. A closed cavity is formed between the lower mold 4 and the sealing film. After gas is replaced in this closed cavity through the air inlet and air outlet provided on the lower mold 4 (the structure of the lower mold 4 is the existing technology), the lower mold 4 continues to move vertically upward, the first spring assembly 52 is compressed, and the lower bottom surface height of the first pressure plate 53 is increased until the lower bottom surface of the second pressure plate 55 contacts the upper surface of the lower mold 4. At this time, the second pressure plate 55 is in the sliding process compared with the through hole 531 of the first pressure plate 53, and the second pressure plate 55 seals the through hole 531 of the first pressure plate 53 to ensure the airtightness of the space. At this time, the sealing film is squeezed by the second pressure plate 55 to fit tightly with the packaging box fixed on the lower mold 4, thereby performing heat sealing and film cutting operations. In this embodiment, a horizontal guide rail 11 for moving the upper mold 5 is specially provided on the shell, so that the upper mold 5 can be easily slid out of the shell along the horizontal guide rail 11, and other upper molds 5 can be easily slid into the shell through the horizontal guide rail 11 for positioning and installation. Therefore, the equipment provided in this embodiment is convenient for replacing the upper mold 5.

[0031] To facilitate the replacement of the lower mold 4, in this embodiment, a lifting plate assembly 6 is also included; the lifting device 3 includes a plurality of electric cylinders 31 and a lifting plate 32; the telescopic end of the electric cylinder 31 is arranged to move in the vertical direction; the lifting plate 32 is fixed to the telescopic end of the electric cylinder 31; the lower mold 4 is detachably fixed on the lifting plate 32; the lifting plate assembly 6 is fixed on the shell 1; a lifting hole 321 is opened in the vertical direction on the surface of the lifting plate 32; the lifting plate assembly 6 is fixed through the lifting hole 321; when the lifting plate 32 moves in the vertical direction, the lifting plate assembly 6 seals the lifting hole 321. The existence of the lifting plate assembly 6 is to facilitate the positioning of the packaging box. After the lower mold 4 moves vertically upward, the sealing film needs to be in close contact with the upper surface of the lower mold 4, and the upper surface of the lower mold 4 needs to be above the opening of the packaging box. In this way, during the ventilation process, gas can enter the packaging box. Therefore, if there is no lifting plate assembly 6, the packaging box moving device 2 needs to move the packaging box to the groove on the lower mold 4. In this embodiment, there is a lifting plate assembly 6, which is fixed to the shell. When the lower mold 4 is at the bottom (when the telescopic end of the electric cylinder 31 contracts, the telescopic end of the electric cylinder 31 moves vertically, the lifting plate 32 is driven by the telescopic end of the electric cylinder 31 to the bottom of the vertical movement range, and the lower mold 4 detachably fixed on the lifting plate 32 is at the bottom), the upper surface of the lifting plate assembly 6 is flush with the upper surface of the lower mold 4. The packaging box moving device 2 only needs to move the packaging box horizontally to position the packaging box. During the film upper operation, the lower mold 4 is driven vertically upward by the lifting plate 32 to During the contact with the first pressure plate 53, the packaging box is still in a state of being supported by the lifting plate assembly 6. At this time, the upper surface height of the lower mold 4 will move to a level higher than the upper opening of the packaging box (because the packaging box is supported by the lifting plate assembly 6, the lower mold 4 cannot drive the packaging box to move up due to the presence of the groove), thereby facilitating ventilation; the lower mold 4 continues to move vertically upward until it contacts the second pressure plate 55. At this time, the groove on the lower mold 4 that matches the packaging box can lift the packaging box and move it vertically upward. The packaging box is separated from the lifting plate assembly 6 due to the support force provided by the lower mold 4 (the lifting plate assembly 6 is fixed through the lifting hole 321. When the upper surface of the lifting plate assembly 6 is below the lifting hole 321, the packaging box will not enter the lifting hole 321 together with the lifting plate assembly 6, but will be supported by the surface of the upper opening of the lifting hole 321, that is, the lifting plate 32 can support the packaging box to continue to move upward), so that the packaging box contacts the second pressure plate 55. The second pressure plate 55 squeezes the sealing film toward the packaging box, thereby performing heat sealing and film cutting operations. In this embodiment, the lower mold 4 is detachably fixed on the lifting plate 32 to achieve horizontal movement limitation for different packaging boxes, thereby achieving the lifting of packaging boxes of different specifications.

[0032] In order to specifically realize the movement of the packaging box moving device 2 for different packaging boxes, in this embodiment, the packaging box moving device 2 includes a horizontal moving device 21 and several positioning baffles 22; the horizontal moving device 21 includes a first guide rail 211, a first slider assembly 212, a second guide rail 213 and two second slider assemblies 214; the first slider assembly 212 is slidably fixed on the first guide rail 211; the second guide rail 213 is fixed on the first slider assembly 212; the second slider assembly 214 is slidably fixed on the second guide rail 213; the extension direction of the first guide rail 211 and the second guide rail 213 is a straight line; the extension direction of the first guide rail 211 and the second guide rail 213 is perpendicular; a positioning baffle 22 is detachably fixed on each of the two second slider assemblies 214; the positioning baffle 22 is provided with several grooves for abutting and positioning the packaging box. Due to the presence of the lifting plate assembly 6, the packaging box only needs to move horizontally to be positioned on the lower mold 4. Therefore, in this embodiment, there is a need for a conveyor belt that is flush with the lower mold 4 when it is at the bottom (the lower limit position of the lower mold 4 during the vertical movement of the lower mold 4 driven by the electric cylinder 31). The horizontal moving device 21 drives the positioning baffle 22 to move the packaging box on the conveyor belt horizontally to the lower mold 4 for positioning. The positioning baffle 22 is moved by the horizontal moving device 21, thereby applying pressure to the packaging box from the opposite sides of the packaging box, so that the packaging box is clamped horizontally. The horizontal clamping process is achieved by controlling the position of the positioning baffle 22 through the servo. After replacing different positioning baffles 22 according to different packaging boxes, the data of different positioning baffles 22 pre-set in the control center (such as PLC) program of the horizontal moving device 21 are switched. Since each positioning baffle 22 is preset with a driver in the control center The first guide rail 211 is arranged along the extension direction of the conveyor belt, and the first slider assembly 212 moves along the first guide rail 211 to move the second guide rail 213. During the period when the second slider assembly 214 moves relative to the second guide rail 213, the positioning baffle 22 fixed on the second slider assembly 214 can be moved from the opposite sides of the packaging box to clamp the packaging box, and then the first slider assembly 212 is moved along the first guide rail 211 to move the entire second guide rail 213, the second slider assembly 214 and the positioning baffle 22 to realize the movement of the packaging box. According to different packaging boxes, the detachable positioning baffle 22 is replaced on the second slider assembly 214 to adapt to the opposite sides of different packaging boxes.

[0033] In order to specifically realize the fixation between the upper mold 5 and the horizontal guide rail 11, as a preferred solution, in this embodiment, a plurality of first fixing holes 511 are opened on the fixing plate 51; a plurality of quick locking pins 111 adapted to the first fixing holes are provided on the horizontal guide rail 11; when the upper mold 5 is fixed on the shell 1, all the quick locking pins 111 correspond to the first fixing holes 511 respectively. The quick locking pin 111 is a prior art, such as a quick locking pin disclosed in Chinese patent application No. 202021785424.0. In this embodiment, a plurality of quick locking pins 111 are fixed on the horizontal guide rail 11. When the fixing plate 51 of the upper mold 5 moves along the horizontal guide rail 11 until the first fixing hole 511 is aligned with the quick locking pin 111, the quick locking pin 111 is controlled to be vertically inserted into the first fixing hole 511, thereby limiting the movement of the fixing plate 51 along the horizontal guide rail 51.

[0034] To achieve the detachable fixation of the lower mold 4 and the lifting plate 32, as a preferred solution, in this embodiment, a plurality of quick locks 322 are provided on the lifting plate 32; a plurality of second fixing holes 41 are provided at the bottom of the lower mold 4; when the lower mold 4 is fixed on the lifting plate 32, the quick locks 322 can be respectively inserted into each second fixing hole 41 for fixation. Quick locks are prior art, such as a coating die head quick lock disclosed in Chinese patent application No. 202322185568.2. The quick lock 322 will lock when inserted into the second fixing hole 41. It is necessary to separately control the quick lock 322 (the control method is prior art) to separate the extended pin shaft of the quick lock 322 from the second fixing hole 41. The quick lock 322 is provided on the lifting plate 32 to cooperate with the second fixing hole 41 of the lower mold 5, so that the lower mold 4 can be stably fixed on the lifting plate 32.

[0035] To ensure a stable connection between the second slider assembly 214 and the positioning baffle 22, as a preferred solution, in this embodiment, the second slider assembly 214 is provided with a plurality of vertically extending positioning pins 2141; the positioning baffle 22 is provided with a plurality of third fixing holes 221; when the positioning baffle 22 is fixed to the second slider assembly 214, the positioning pins 2141 are respectively inserted into each of the third fixing holes 221. In this embodiment, the positioning baffle 22 and the second slider assembly 214 are limited in position by the cooperation of the positioning pins 2141 and the third fixing holes 221. To ensure an accurate connection between the positioning baffle 22 and the second slider assembly 214, a plum blossom bolt 222 is further included; the second slider assembly 214 and the positioning baffle 22 are respectively provided with a fourth fixing hole 2142; when the positioning baffle 22 is fixed to the second slider assembly 214, the plum blossom bolt 222 can be simultaneously inserted into the fourth fixing holes 2142 on the second slider assembly 214 and the positioning baffle 22. The plum blossom bolt 222 can be inserted into the fourth fixing hole 2142 on the second slider assembly 214 and the positioning baffle 22 at the same time to determine whether the second slider assembly 214 and the positioning baffle 22 are accurately positioned. If they cannot be inserted normally, the connection between the second slider assembly 214 and the positioning baffle 22 needs to be repositioned. The plum blossom bolt 222 is tightened into the fourth fixing hole 2142 (the fourth fixing hole 2142 is a threaded hole) respectively opened on the second slider assembly 214 and the positioning baffle 22, and the plum blossom bolt 22 is used to move the positioning baffle 22 in the vertical direction compared to the second slider assembly 214.

[0036] In summary, the present invention provides a film upper system for a modified atmosphere packaging machine, which relates to the technical field of modified atmosphere packaging machines and includes a shell, a packaging box moving device, a lifting device, a lower mold, and an upper mold; the lifting device is fixed to the shell; the lower mold is detachably fixed to the lifting device; the upper mold is detachably fixed to the shell; when the upper mold is fixed to the shell and the lower mold is fixed to the lifting device, the upper mold is vertically above the lower mold; the lifting device can move the lower mold in the vertical direction; when the lifting device moves the lower mold in the vertical direction, the packaging box moving device can move the packaging box onto the lower mold. The film upper system for a modified atmosphere packaging machine provided by the present invention solves the problem of the limited number of packaging boxes that can be packaged by a modified atmosphere packaging machine in the prior art, and can increase the number of packaging boxes that can be packaged by a single modified atmosphere packaging machine.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A film loading system for a modified atmosphere packaging machine, comprising a housing; characterized in that: It also includes a packaging box moving device, a lifting device, a lower mold and an upper mold; The lifting device is fixed on the housing; the lower mold is detachably fixed on the lifting device; The upper mold is detachably fixed to the shell; When the upper die is fixed on the housing and the lower die is fixed on the lifting device, the upper die is vertically above the lower die; The lifting device can move the lower mold in the vertical direction; When the lifting device moves the lower mold in the vertical direction, the packaging box moving device can move the packaging box onto the lower mold.

2. The film loading system for a modified atmosphere packaging machine according to claim 1, characterized in that: The upper die includes a fixed plate, a first spring assembly, a first pressing plate, a second spring assembly and a second pressing plate; A horizontal guide rail is provided in the housing; the fixing plate can be slidably fixed on the horizontal guide rail; The first pressing plate is fixed to the lower bottom surface of the fixed plate through the first spring assembly; the second pressing plate is fixed to the lower bottom surface of the fixed plate through the second spring assembly; When not squeezed by external force, the height of the lower bottom surface of the first pressing plate is lower than the height of the lower bottom surface of the second pressing plate; The first pressing plate has a through hole extending vertically therethrough; the second pressing plate is slidably fixed in the through hole; and when the second pressing plate slides relative to the through hole of the first pressing plate, the second pressing plate seals the through hole of the first pressing plate.

3. The film loading system for a modified atmosphere packaging machine according to claim 2, characterized in that: It also includes a lifting plate assembly; the lifting device includes a plurality of electric cylinders and lifting plates; The telescopic end of the electric cylinder is arranged to move in the vertical direction; the lifting plate is fixed to the telescopic end of the electric cylinder; The lower mold is detachably fixed to the lifting plate; The lifting plate assembly is fixed on the housing; The lifting plate surface is provided with a lifting hole in the vertical direction; the lifting plate assembly is fixed through the lifting hole; when the lifting plate moves in the vertical direction, the lifting plate assembly seals the lifting hole.

4. The film loading system for a modified atmosphere packaging machine according to claim 1, characterized in that: The packaging box moving device includes a horizontal moving device and a plurality of positioning baffles; the horizontal moving device includes a first guide rail, a first slider assembly, a second guide rail and two second slider assemblies; The first slider assembly is slidably fixed on the first guide rail; the second guide rail is fixed on the first slider assembly; the second slider assembly is slidably fixed on the second guide rail; The extension directions of the first guide rail and the second guide rail are straight lines; the extension directions of the first guide rail and the second guide rail are perpendicular; One positioning baffle is detachably fixed to each of the two second sliding block assemblies; The positioning baffle is provided with a plurality of grooves for abutting and positioning the packaging box.

5. The film loading system for a modified atmosphere packaging machine according to claim 2, characterized in that: The fixing plate is provided with a plurality of first fixing holes; the horizontal guide rail is provided with a plurality of quick locking pins adapted to the first fixing holes; when the upper mold is fixed on the shell, all the quick locking pins correspond to the first fixing holes respectively.

6. The film loading system for a modified atmosphere packaging machine according to claim 3, characterized in that: The lifting plate is provided with a plurality of quick lockers; the bottom of the lower mold is provided with a plurality of second fixing holes; When the lower mold is fixed on the lifting plate, the quick lockers can be respectively inserted into the second fixing holes for fixing.

7. The film loading system for a modified atmosphere packaging machine according to claim 4, characterized in that: The second slider assembly is provided with a plurality of vertically extending positioning pins; the positioning baffle is provided with a plurality of third fixing holes; when the positioning baffle is fixed to the second slider assembly, the positioning pins are respectively inserted into each of the third fixing holes.

8. The film loading system for a modified atmosphere packaging machine according to claim 7, characterized in that: It also includes a plum blossom bolt; a fourth fixing hole is respectively provided on the second slider assembly and the positioning baffle; when the positioning baffle is fixed to the second slider assembly, the plum blossom bolt can be simultaneously inserted and fixed to the fourth fixing holes on the second slider assembly and the positioning baffle.

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