Modified atmosphere packaging machine

Abstract

The present invention provides a modified atmosphere packaging machine, which relates to the technical field of modified atmosphere packaging machines, and includes a packaging box conveyor belt and a packaging box separation belt; the packaging box conveyor belt and the packaging box separation belt convey the packaging box in a direction from back to front; the packaging box separation belt is connected in front of the packaging box conveyor belt; the belt speed of the packaging box separation belt is faster than the belt speed of the packaging box conveyor belt. The modified atmosphere packaging machine provided by the present invention solves the problem in the prior art that the moving device easily affects the adjacent packaging boxes when moving the packaging boxes, and can separate the packaging boxes on the conveyor belt, thereby preventing the moving device from contacting the adjacent packaging boxes when moving the packaging boxes.

Description

Technical Field

[0001] The invention relates to the technical field of modified atmosphere packaging machines, in particular to modified atmosphere packaging machines. Background Art

[0002] A modified atmosphere packaging machine is a packaging device specially used for food preservation. It evacuates the cavity of the sealed packaging mold, then fills it with a fresh-keeping gas mixed by a built-in mixer with two or three gases (such as nitrogen, oxygen, carbon dioxide, etc.), and then performs operations such as heat plastic sealing and film cutting to complete the output of the finished product fresh-keeping packaging. This technology can effectively extend the shelf life or shelf life of food and maintain the freshness and taste of food.

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

[0004] During the use of the modified atmosphere packaging machine, the packaging box needs to be moved to a specified position (i.e., between the upper mold and the lower mold). In order to ensure the accuracy of the movement position of the packaging box, there is usually a moving device for moving the packaging box. However, the packaging boxes on the existing conveyor belt for transporting the packaging boxes may move close to each other and stick together front and back along the conveying direction of the conveyor belt. This is not conducive to the moving device clamping the packaging box from the side of the packaging box, because when the moving device moves a packaging box, it may contact the packaging box that is close to it, which may cause the packaging box that is close to it to be affected (squeezed or pushed) by the moving device. Summary of the invention

[0005] In view of the above technical problems, the modified atmosphere packaging machine provided by the present invention can conveniently separate the packaging boxes on the conveyor belt.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The modified atmosphere packaging machine provided by the present invention comprises a film feeding system, a film upper system and a conveyor belt system; the film upper system comprises a packaging box moving device, a lifting device, an upper mold and a lower mold; the lifting device is fixed on the shell; the lower mold is detachably fixed on the lifting device; the upper mold is detachably fixed on the shell; when the upper mold is fixed on the shell and the lower mold is fixed on the lifting device, the upper mold is vertically above the lower mold; the lifting device can move the lower mold in the vertical direction; the film feeding system can continuously provide a sealing film between the upper mold and the lower mold; the conveyor belt system can continuously provide a packaging box to the packaging box moving device; when the lifting device moves the lower mold in the vertical direction, the packaging box moving device can move the packaging box to the lower mold.

[0008] The modified atmosphere packaging machine provided by the present invention preferably comprises an upper mold including 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 arranged 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 penetrating in the vertical direction is provided on the surface of the first pressure plate; 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.

[0009] The modified atmosphere packaging machine provided by the present invention preferably comprises: the upper film system further comprising a lifting plate assembly; the lifting device comprises 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 in the vertical direction on the surface of the lifting plate; 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.

[0010] The modified atmosphere packaging machine provided by the present invention preferably comprises: the packaging box moving device comprises a horizontal moving device and a plurality of positioning baffles; the horizontal moving device comprises 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 on each of the two second slider assemblies; the positioning baffle is provided with a plurality of grooves for abutting and positioning the packaging box.

[0011] The modified atmosphere packaging machine provided by the present invention preferably comprises a film feeding system including a film placing roller, a film collecting roller, a motor, a first steering roller, a second steering roller, a third steering roller and a fourth steering roller; the cylinder axes of the film placing roller, the film collecting roller, the first steering roller, the second steering roller, the third steering roller and the fourth steering roller are all parallel; the film placing roller can be rotatably fixed on the shell; the motor is fixed on the shell; the film collecting roller is fixed on the rotating shaft of the motor; the motor can drive the film collecting roller to rotate along the cylinder axis of the film collecting roller; a slide groove extending in a vertical direction is provided on the shell; the first steering roller can be slidably fixed in the slide groove; the first steering roller The drum can rotate in the slide groove along the drum axis of the first turning roller; the first turning roller is arranged below the film placing roller; the second turning roller can be rotatably fixed on the shell; the second turning roller is arranged above the first turning roller; the third turning roller and the fourth turning roller can be rotatably fixed on the shell; the third turning roller and the fourth turning roller are arranged at the same height; in the horizontal direction, the upper mold and the lower mold are both between the third turning roller and the fourth turning roller; the upper mold is arranged above the third turning roller and the fourth turning roller; the lifting device can move the lower mold to below the third turning roller and the fourth turning roller.

[0012] The modified atmosphere packaging machine provided by the present invention preferably comprises: the film feeding system further comprising a magnetic powder torque controller, a control system, an encoder and a detection switch capable of identifying the interval length of the color film; the end of the film placing roller is fitted with the magnetic powder torque controller; the encoder is fixed on the shell; the encoder comprises a counting ring; the counting ring is tangent to the second steering roller; the linear speed of the rim of the counting ring is consistent with that of the rim of the second steering roller; the detection switch has a sensing head facing between the second steering roller and the third steering roller; the motor is electrically connected to the control system; the magnetic powder torque controller is electrically connected to the control system; the encoder is electrically connected to the control system; the detection switch is electrically connected to the control system.

[0013] The modified atmosphere packaging machine provided by the present invention preferably comprises: the film feeding system further comprising a film pressing mechanism; the film pressing mechanism comprises a first pressing roller, a second pressing roller and a clamping assembly; both ends of the first pressing roller can be rotatably fixed on the shell; both ends of the second pressing roller can be rotatably fixed on the shell and the clamping assembly respectively; the roller axes of the first pressing roller and the second pressing roller are parallel to the cylinder axis of the film collecting roller; the clamping assembly is fixed on the shell; the clamping assembly can press the second pressing roller toward the first pressing roller; the second pressing roller comprises a plurality of cylindrical extrusion cylinders; the outer wall of the extrusion cylinder is coated with an anti-slip layer; the anti-slip layer is in contact with the outer wall of the first pressing roller; the outer wall diameter of the anti-slip layer is equal to the diameter of the first pressing roller.

[0014] The modified atmosphere packaging machine provided by the present invention preferably comprises: the film feeding system further comprising a plurality of fifth turning rollers for guiding the film to avoid the shell; the axis of the fifth turning roller is parallel to the axis of the fourth turning roller; the fifth turning roller is rotatably fixed on the shell.

[0015] The modified atmosphere packaging machine provided by the present invention preferably has a conveyor belt system comprising a packaging box conveyor belt and a packaging box separation belt; the packaging box conveyor belt and the packaging box separation belt convey the packaging boxes in a direction from back to front; the packaging box separation belt is connected in front of the packaging box conveyor belt; the packaging box moving device can move the packaging box on the packaging box separation belt to the lower mold; the belt speed of the packaging box separation belt is faster than the belt speed of the packaging box conveyor belt.

[0016] The modified atmosphere packaging machine provided by the present invention preferably comprises: the conveyor belt system further comprising an actively rotatable driving roller; the packaging box conveyor belt comprises a first driven roller and a plurality of annular first circular conveyor belts; the packaging box separation belt comprises a second driven roller and a plurality of annular second circular conveyor belts; a plurality of first grooves and a plurality of second grooves are arranged on the driving roller; the first grooves and the second grooves are arranged at intervals; the spacing between adjacent first grooves and second grooves is equal; the first grooves and the second grooves are both circular, and the circular axes of the first grooves and the second grooves are collinear with the axis of the driving roller; the bottom diameter of the first groove is smaller than the bottom diameter of the second groove; the first circular conveyor belt is tightened around the first driven roller and the driving roller; each of the first circular conveyor belts is respectively arranged in one of the first grooves; the second circular conveyor belt is tightened around the second driven roller and the driving roller; each of the second circular conveyor belts is respectively arranged in one of the second grooves.

[0017] The present invention provides a modified atmosphere packaging machine, which relates to the technical field of modified atmosphere packaging machines, including a film feeding system, a film loading system and a conveyor belt system; the film loading system includes a packaging box moving device, a lifting device, an upper mold and a lower 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; the film feeding system The sealing film can be continuously provided between the upper mold and the lower mold; the conveyor belt system can continuously provide the packaging box to the packaging box moving device; the conveyor belt system includes a packaging box conveyor belt and a packaging box separation belt; the packaging box conveyor belt and the packaging box separation belt convey the packaging box in a direction from back to front; the packaging box separation belt is connected in front of the packaging box conveyor belt; the packaging box moving device can move the packaging box on the packaging box separation belt to the lower mold; the belt speed of the packaging box separation belt is faster than the belt speed of the packaging box conveyor belt. The modified atmosphere packaging machine provided by the present invention solves the problem in the prior art that the moving device is easy to affect the adjacent packaging boxes when moving the packaging boxes, and can separate the packaging boxes on the conveyor belt, thereby preventing the moving device from contacting the adjacent packaging boxes when moving the packaging boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention and its features, configurations and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings. The drawings are not drawn to scale, but rather to illustrate the subject matter of the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the modified atmosphere packaging machine provided in Example 1 of the present invention with part of the shell removed.

[0021] Figure 3 It is a structural schematic diagram of the film feeding system of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the film pressing mechanism of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0023] Figure 5 It is a structural schematic diagram of a circuit connection wire frame film feeding system of a film feeding system of a modified atmosphere packaging machine provided in Example 1 of the present invention.

[0024] Figure 6It is a structural schematic diagram of the film loading system of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the position of the first guide rail on the shell of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0026] Figure 8 It is a structural schematic diagram of the packaging box moving device of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0027] Fig. 9 It is a schematic diagram of the upper mold structure of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0028] Fig.10 It is a structural schematic diagram of the conveyor belt system of the modified atmosphere packaging machine provided in Example 1 of the present invention.

[0029] Fig.11 It is a schematic structural diagram of the driving roller of the modified atmosphere packaging machine provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described below in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the protection scope of the present invention.

[0031] Embodiment 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 resulting in a large number of packaging box types, multiple different modified atmosphere packaging machines are required 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, in this embodiment, as shown in FIG. Figures 1 to 11As shown, it includes a shell 1, a film-moving system 2, a film-upper system 3 and a conveyor belt system 4; the film-upper system 3 includes a packaging box moving device 31, a lifting device 32, an upper mold 33 and a lower mold 34; the lifting device 32 is fixed on the shell 1; the lower mold 34 is detachably fixed on the lifting device 32; the upper mold 33 is detachably fixed on the shell 1; when the upper mold 33 is fixed on the shell 1 and the lower mold 34 is fixed on the lifting device 32, the upper mold 33 is vertically above the lower mold 34; the lifting device 32 can move the lower mold 34 in the vertical direction; the film-moving system 2 can continuously provide a sealing film between the upper mold 33 and the lower mold 34; the conveyor belt system 4 The packaging boxes can be continuously provided to the packaging box moving device 31; when the lifting device 32 moves the lower mold 34 in the vertical direction, the packaging box moving device 31 can move the packaging box onto the lower mold 34; the conveyor belt system 4 includes a packaging box conveyor belt 41 and a packaging box separation belt; the packaging box conveyor belt 41 and the packaging box separation belt 42 convey the packaging boxes from back to front; the packaging box separation belt 42 is connected in front of the packaging box conveyor belt 41; the packaging box moving device 31 can move the packaging box on the packaging box separation belt 42 to the lower mold 34; the belt speed of the packaging box separation belt 42 is faster than the belt speed of the packaging box conveyor belt 41.

[0032] Modified atmosphere packaging machines are prior art. For example, the specific structure and working principle of a modified atmosphere packaging machine have been disclosed in the comparative documents provided in the background technology. The modified atmosphere packaging machine provided in this embodiment includes three major systems, namely, a film feeding system 2, a film applying system 3, and a conveyor belt system 4. The film feeding system 2 is responsible for moving the sealing film, the film applying system 3 is responsible for combining the packaging box and the sealing film after ventilation, and the conveyor belt system 4 is responsible for continuously inputting and outputting the packaging box into and out of the film applying system 3. The modified atmosphere packaging machine provided in Example 1 of the present invention improves the film applying system 3 so that the upper mold 33 and the lower mold 34 are replaceable, thereby realizing the film applying operation of one modified atmosphere packaging machine for different packaging boxes; the upper mold 33 is detachably fixed on the shell 1, and the lower mold 34 is detachably fixed on the lifting device 32. The film applying operation for different packaging boxes is realized by replacing different upper molds 33 and lower molds 34. During the specific film applying process, the packaging box moving device 31 accurately positions the packaging box in the groove of the lower mold 34 and between the lower mold 34 and the upper mold 33. At this time, the lower mold 34 is lifted by the lifting device 32. The upper mold 33 and the lower mold 34 are lifted up together with the packaging box on the lower mold 34. After the lower mold 34 and the upper mold 33 are pressed against each other, an enclosed 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 33 and the lower mold 34 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 elaborated here.) Different from the prior art, during the film application process of the packaging box, the upper mold 33 and the lower mold 34 are used to position, heat seal and cut the film of the packaging box, and the upper mold 33 and the lower mold 34 in this embodiment are both detachable. Therefore, using the equipment provided by this embodiment, for packaging boxes of different specifications, you only need to replace the upper mold 33 and the lower mold 34 to achieve film application operations for different packaging boxes. Therefore, the equipment provided by this embodiment has a wide range of applications. The purpose of the conveyor belt system 4 is to continuously provide packaging boxes to the packaging box moving device 31 to the upper film system. However, when the packaging box moving device 31 moves the packaging boxes, it may touch adjacent packaging boxes at the same time. To solve this problem, in the present embodiment, the conveyor belt is configured to be a packaging box conveyor belt 41 and a packaging box separation belt 42 with different belt speeds. After the packaging boxes are placed on the packaging box conveyor belt 41 from the outside, the packaging boxes move along the packaging box conveyor belt 41 to the packaging box separation belt 42. When the packaging boxes enter the packaging box separation belt 42, they are accelerated because the speed of the packaging box separation belt 42 is greater than the speed of the packaging box conveyor belt 41. When two packaging boxes that are close to each other on the packaging box conveyor belt 41 move to the junction of the packaging box conveyor belt 41 and the packaging box separation belt 42, the packaging boxes that are close to each other will enter the packaging box separation belt 42 one after another, so that the packaging boxes that are close to each other are accelerated one after another, so that the packaging boxes that were originally close to each other are separated at the packaging box separation belt 42, so that it is convenient for the subsequent moving device to grab the packaging boxes.

[0033] The modified atmosphere packaging machine provided in Example 1 of the present invention solves the problem in the prior art that the moving device easily affects adjacent packaging boxes when moving packaging boxes. The packaging boxes on the conveyor belt can be separated, thereby preventing the moving device from contacting adjacent packaging boxes when moving packaging boxes, thereby affecting the normal packaging process.

[0034] In order to realize the replacement of the upper mold 33 from the entire upper mold system, in this embodiment, the upper mold 33 includes a fixed plate 331, a first spring assembly 332, a first pressure plate 333, a second spring assembly 334 and a second pressure plate 335; a horizontal guide rail 11 is provided in the housing 1; the fixed plate 331 can be slidably fixed on the horizontal guide rail 11; the first pressure plate 333 is fixed to the lower bottom surface of the fixed plate 331 through the first spring assembly 332; the second pressure plate 335 is fixed to the lower bottom surface of the fixed plate 331 through the second spring assembly 334; Component 334 is fixed on the lower bottom surface of the fixed plate 331; when not squeezed by external force, the height of the lower bottom surface of the first pressure plate 333 is lower than the height of the lower bottom surface of the second pressure plate 335; the first pressure plate 333 is provided with a through hole 3331 running through the plate surface in the vertical direction; the second pressure plate 335 can be slidably fixed in the through hole 3331; during the sliding process of the second pressure plate 335 relative to the through hole of the first pressure plate 333, the second pressure plate 335 seals the through hole 3331 of the first pressure plate 333. The structure of the upper mold 33 of the present 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 33 in the present embodiment includes a fixing plate 331, and the fixing plate 331 can be slidably fixed in the horizontal guide rail 11 set on the shell 1, which can facilitate the disassembly and assembly of the upper mold 33 relative to the shell 1 (a quick locking pin is provided in the horizontal guide rail 11 of the present embodiment, and a hole matching the quick locking pin is provided on the fixing plate 331. After the upper mold 33 is moved and aligned, the upper mold 33 is fixed relative to the horizontal guide rail 11 by controlling the quick locking pin). After the upper mold 33 is fixed on the shell 1, the lower mold 34 needs to be lifted up twice in succession. After the packaging box is set on, the lower mold 34 first moves vertically upward to the middle position, so that the upper surface of the lower mold 34 is in close contact with the lower bottom surface of the first pressure plate 333. At this time, the upper surface of the lower mold 34 is in close contact with the sealing film, and a closed cavity is formed between the cavity of the lower mold 34 for accommodating the packaging box and the sealing film. After gas is replaced in this closed cavity through the air inlet and air outlet set on the lower mold 34 (the structure of the lower mold 34 is the prior art), the lower mold 34 continues to move vertically upward, the first spring assembly 332 is compressed, and the height of the lower bottom surface of the first pressure plate 333 is increased until the lower bottom surface of the second pressure plate 335 contacts the upper surface of the lower mold 34. At this time, the sealing film is squeezed by the second pressure plate 335 to be in close contact with the packaging box fixed on the lower mold 34, thereby performing heat sealing and film cutting operations. In this embodiment, a horizontal guide rail 11 is specially provided on the shell for moving the upper mold 33, so that the upper mold 33 can be conveniently removed from the shell by sliding along the horizontal guide rail 11, and other upper molds 33 can be conveniently slid into the shell 1 through the horizontal guide rail 11 for positioning and installation. Therefore, the equipment provided in this embodiment is convenient for replacing the upper mold 33.

[0035] To facilitate the replacement of the lower mold 34, in the present embodiment, the upper film system 3 also includes a lifting plate assembly 35; the lifting device 32 includes a plurality of electric cylinders 321 and lifting plates 322; the telescopic end of the electric cylinder 321 is arranged to move in the vertical direction; the lifting plate 322 is fixed to the telescopic end of the electric cylinder 321; the lower mold 34 is detachably fixed on the lifting plate 322; the lifting plate assembly 35 is fixed on the shell 1; a lifting hole 3221 is provided on the surface of the lifting plate 322 in the vertical direction; the lifting plate assembly 35 is fixed through the lifting hole 3221; when the lifting plate 322 moves in the vertical direction, the lifting plate assembly 35 seals the lifting hole 3221. The existence of the lifting plate assembly 35 is to facilitate the positioning of the packaging box. After the lower mold 34 moves vertically upward, the sealing film needs to be in close contact with the upper surface of the lower mold 34, and the upper surface of the lower mold 34 needs to be above the opening of the packaging box, so that a gap is left between the upper surface of the lower mold 34 and the opening of the packaging box. During the ventilation process, the gas can enter the packaging box from the gap. Therefore, if there is no lifting plate assembly 35, the packaging box moving device 31 needs to move the packaging box to the groove on the lower mold 34. In this embodiment, there is a lifting plate assembly 35, and the lifting plate The assembly 35 is fixed on the shell 1. When the lower mold 34 is at the lowest position (when the telescopic end of the electric cylinder 321 is retracted, since the telescopic end of the electric cylinder 321 moves in the vertical direction, the lifting plate 322 is driven by the telescopic end of the electric cylinder 321 to the lowest position in the vertical movement range, and the lower mold 34 detachably fixed on the lifting plate 322 is at the lowest position), the upper surface of the lifting plate assembly 35 is flush with the upper surface of the lower mold 34. The packaging box moving device 31 only needs to move the packaging box horizontally to position the packaging box. During the film application operation, the lower mold 34 is lifted When the lowering plate 322 is driven to move vertically upward until it contacts the first pressing plate 333, the packaging box is still supported by the lifting plate assembly 35. At this time, the upper surface height of the lower mold 34 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 35, the lower mold 34 cannot drive the packaging box to move upward due to the presence of the groove), thereby facilitating ventilation; the lower mold 34 continues to move vertically upward until it contacts the second pressing plate 335. At this time, the groove on the lower mold 34 that matches the packaging box can lift the packaging box to move vertically upward. The supporting force provided (the lifting plate assembly 35 is fixed through the lifting hole 3221. When the upper surface of the lifting plate assembly 35 is below the lifting hole 3221, the packaging box will not enter the lifting hole 3221 together with the lifting plate assembly 35, but will be supported by the surface where the upper opening of the lifting hole 3221 is located, that is, the lifting plate 322 can support the packaging box to continue to move upward) is separated from the lifting plate assembly 35, so that the packaging box contacts the second pressing plate 335, and the second pressing plate 335 presses the sealing film toward the packaging box, thereby performing heat sealing and film cutting operations.In the present embodiment, the lower mold 34 is detachably fixed on the lifting plate 322 (in the present embodiment, a quick lock is preferably provided on the lifting plate 322, and the opening at the bottom of the lower mold 34 cooperates with the quick lock to achieve the fixation of the lower mold 34 and the lifting plate 322), so as to achieve the limitation of the horizontal movement of different packaging boxes, thereby achieving the lifting of packaging boxes of different specifications.

[0036] In order to specifically realize the movement of the packaging box moving device for different packaging boxes, in the present embodiment, the packaging box moving device 31 includes a horizontal moving device 311 and a plurality of positioning baffles 312; the horizontal moving device 311 includes a first guide rail 3111, a first slider assembly 3112, a second guide rail 3113 and two second slider assemblies 3114; the first guide rail 3111 is fixed on the shell 1; the first slider assembly 3112 can be slidably fixed on the first guide rail 3111; the second guide rail 3113 is fixed on the first slider assembly 3112; the second slider assembly 3114 can be slidably fixed on the second guide rail 3113; the extension direction of the first guide rail 3111 and the second guide rail 3113 is a straight line; the extension direction of the first guide rail 3111 and the second guide rail 3113 is perpendicular; a positioning baffle 312 is detachably fixed on each of the two second slider assemblies 3114; and a plurality of grooves for abutting and positioning the packaging box are provided on the positioning baffle 312. Due to the existence of the lifting plate assembly 35, the packaging box only needs to be moved horizontally to be positioned on the lower mold 34. Therefore, in this embodiment, there is a need for a conveyor belt (provided by the conveyor belt system 4 of this embodiment) that is flush with the lower mold 34 when it is at the lowest position (the lower limit position of the lower mold 34 when the electric cylinder 321 drives the lower mold 34 to move vertically). The horizontal moving device 311 drives the positioning baffle 312 to move the packaging box on the conveyor belt system 4 horizontally to the lower mold 34 for positioning. The positioning baffle 312 is moved by the horizontal moving device 311. The two positioning baffles 312 are used to apply pressure to the packaging box from 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 312 through a servo. After replacing different positioning baffles 312 according to different packaging boxes, the data of different positioning baffles 312 pre-set in the control center (such as PLC) program of the horizontal moving device 311 are switched. Since each positioning baffle 312 is in the control center A driving distance is preset in the method, so it is possible to avoid manually adjusting the moving distance of the second slider assembly 3114 according to different positioning baffles, and the posture adjustment of the packaging box is achieved by using the groove on the positioning baffle 312 that matches the packaging box. The first guide rail 3111 is arranged along the extension direction of the conveyor belt, and the first slider assembly 3112 moves along the first guide rail 3111 to move the second guide rail 3113 until the second slider assembly 3114 moves relative to the second guide rail 3113. The positioning baffle 312 fixed on the second slider assembly 3114 can be moved from the opposite sides of the packaging box to clamp the packaging box, and then the first slider assembly 3112 is moved along the first guide rail 3111 to move the entire second guide rail 3113, the second slider assembly 3114 and the positioning baffle 312, thereby realizing the movement of the packaging box. According to different packaging boxes, the detachable positioning baffle 312 is replaced on the second slider assembly 3114 to adapt to the opposite sides of different packaging boxes, thereby realizing the movement of different packaging boxes.

[0037] In order to specifically move the sealing film between the upper mold and the lower mold by the film feeding system 2, as a preferred solution, in this embodiment, the film feeding system 2 includes a film placing roller 201, a film collecting roller 202, a motor 203, a first turning roller 204, a second turning roller 205, a third turning roller 206 and a fourth turning roller 207; the cylinder axes of the film placing roller 201, the film collecting roller 202, the first turning roller 204, the second turning roller 205, the third turning roller 206 and the fourth turning roller 207 are all parallel; the film placing roller 201 can be rotatably fixed on the shell 1; the motor 203 is fixed on the shell 1; the film collecting roller 202 is fixed on the rotating shaft of the motor 203; the motor 203 can drive the film collecting roller 202 to rotate along the cylinder axis of the film collecting roller 202; a slide groove 12 extending in the vertical direction is provided on the shell 1; the first turning roller 204 can be slidably fixed in the slide groove 12; the first turning roller 204 can rotate along the cylinder axis of the first turning roller 204 in the slide groove 12; the first turning roller 204 is arranged below the film placing roller 201; the second turning roller 205 can be rotatably fixed on the shell 1; the second turning roller 205 is arranged above the first turning roller 204; the third turning roller 206 and the fourth turning roller 207 can both be rotatably fixed on the shell 1; the third turning roller 206 and the fourth turning roller 207 are arranged at the same height; in the horizontal direction, the upper mold 33 and the lower mold 34 are both between the third turning roller 206 and the fourth turning roller 207; the upper mold 33 is arranged above the third turning roller 206 and the fourth turning roller 207; the lifting device can move the lower mold 34 to below the third turning roller 206 and the fourth turning roller 207.The end of the sealing film is allowed to pass around the lower side of the first turning roller 204, the upper side of the second turning roller 205, the lower side of the third turning roller 206, and the lower side of the fourth turning roller 207 in sequence, and finally wound around the film-collecting roller 202. When the film-collecting roller 202 rotates due to the operation of the motor 203, the sealing film will be tightened, and the continuous rotation of the film-collecting roller 202 drives the film-releasing roller 201 to rotate, thereby realizing the synchronous processing of film collection and film release; the lower mold and the upper mold are arranged between the third turning roller 206 and the fourth turning roller 207. The film placing roller 206 and the fourth turning roller 207 flatten the film in the horizontal direction to facilitate the film placing system 3 to cut the film; compared with the prior art, there are two motors to control the film placing roller 201 and the film collecting roller 202 respectively, and the film placing roller 201 and the film collecting roller 202 may rotate asynchronously. This embodiment only needs one motor to drive, thereby ensuring the synchronous operation of the film placing roller 201 and the film collecting roller 202; and in this embodiment, the first turning roller 204 is slidably fixed in the vertical slide groove 12 of the shell 1, using The first turning roller 204 itself weighs down the sealing film, so that when the sealing film is over-tightened, the sealing film can drive the first turning roller 204 vertically upward along the chute 12, thereby shortening the film length between the film-releasing roller 201 and the first turning roller 204, shortening the film length between the first turning roller 204 and the second turning roller 205, thereby shortening the film feeding end, that is, the length of the film between the film-releasing roller 201 and the third turning roller 206, relieving the film tension at the film feeding end and reducing the film breakage. The roller 201 can actively release the film, causing the film at the film feeding end to become loose, thereby affecting the tightness of the film between the third turning roller 206 and the fourth turning roller 207, which may affect the normal film cutting. The device provided in this embodiment will not have a loose film situation, because the film releasing roller 201 in this embodiment cannot actively release the film, and the film collecting roller 202 must be actively rotated, and the film is used to pull and rotate the film releasing roller 201, thereby solving the problem of easy film breaking in the prior art, and reducing the situation where the film breaks and causes the equipment to stop.

[0038] As a preferred solution, in this embodiment, the film feeding system 2 also includes a magnetic powder torque controller 208, a control system 209, an encoder 210 and a detection switch 211 that can identify the length of the color film interval; the end of the film placing roller 201 is fixed with a magnetic powder torque controller 208; the encoder 210 is fixed on the shell 1; the encoder 210 includes a counting ring 2101; the counting ring 2101 is tangent to the second turning roller 205; the rim of the counting ring 2101 is consistent with the linear speed of the rim of the second turning roller 205; the detection switch 211 has a sensing head facing between the second turning roller 205 and the third turning roller 206; the motor 203 is electrically connected to the control system 209; the magnetic powder torque controller 208 is electrically connected to the control system 209; the encoder 210 is electrically connected to the control system 209; the detection switch 211 is electrically connected to the control system 209. When the film collecting roller 202 rotates to roll up the film, the control system 209 gives the magnetic powder torque controller 208 an output torque to avoid film loosening during the film rolling process. When the film rolling stops, the control system 209 gives the magnetic powder torque controller 208 another output torque to ensure that the sealing film rolled up on the film placing roller 201 is fixed. Because in the process of moving the sealing film using the film collecting roller 202, the sealing film will drive the film placing roller 201 to rotate. At this time, if the rotation of the film collecting roller 202 is suddenly stopped, the film placing roller 201 will have an inertia and continue to rotate. The rotation of the film placing roller 201 will continue to move part of the sealing film, causing the sealing film to loosen. The encoder 210 feeds back a signal to the control system 209, which then controls the motor 203. The signal received by the switch encoder 210 is the number of rotations of the second steering roller 205, and the diameter of the second steering roller 205 is constant. When the film passes through the second steering roller 205, the second steering roller 205 rotates synchronously. Therefore, the length of the film passing through can be obtained by knowing the number of rotations of the second steering roller 205. Knowing the length of the film passing through can reversely control the switch of the motor 203, so as to accurately determine the distance of the film at each film cutting interval and reduce film waste; some films have their own patterns and color patterns. At this time, the patterns on the film need to be aligned. In this embodiment, a detection switch 211 is set to identify the color pattern on the film, and after identification, a signal is fed back to the control system 209 to control the operation of the motor; the detection switch 211 for identifying color film is a prior art and will not be elaborated here.

[0039] In order to ensure that the film can be collected evenly on the film collection roller 202 and reduce the deflection of the film surface caused by the folding of the film, which affects the flattening between the fourth turning roller 207 and the third turning roller 206, as a preferred solution, in this embodiment, the film feeding system 2 also includes a film pressing mechanism 212; the film pressing mechanism 212 includes a first pressing roller 2121, a second pressing roller 2122 and a pressing assembly 2123; both ends of the first pressing roller 2121 can be rotatably fixed on the shell 1; both ends of the second pressing roller 2122 can be rotatably fixed on the shell 1 and the pressing assembly 2123 respectively. 23; the roller axes of the first pressing roller 2121 and the second pressing roller 2122 are parallel to the cylinder axis of the film collecting roller 202; the clamping assembly 2123 is fixed on the shell 1; the clamping assembly 2123 can press the second pressing roller 2122 toward the first pressing roller 2121; the second pressing roller 2122 includes a plurality of cylindrical extrusion cylinders 21221; the outer wall of the extrusion cylinder is coated with an anti-skid layer 21222; the anti-skid layer 21222 is in contact with the outer wall of the first pressing roller 2121; the outer wall diameter of the anti-skid layer 21222 is equal to the diameter of the first pressing roller 2121. The film pressing mechanism 212 is composed of a first pressing roller 2121 and a second pressing roller 2122. After the waste film flows out from the third turning roller 206, it may be deflected or folded in shape due to the previous film cutting behavior. After the film passes between the first pressing roller 2121 and the second pressing roller 2122, the linear speed of the contact surface between the first pressing roller 2121 and the second pressing roller 2122 and the film is controlled so that the linear speeds of the two sides of the film are equal when moving, thereby avoiding the left and right deviation of the rolled film, thereby facilitating the subsequent film collection work on the film collection roller 202. Since the film needs to be wound around the film collection roller 202 during the initial layout, it is necessary to manually pass the film between the first pressing roller 2121 and the second pressing roller 2122. Therefore, a gap needs to be left between the first pressing roller 2121 and the second pressing roller 2122 to facilitate this operation. The clamping assembly 2123 can reduce the influence of the gap left between the first pressing roller 2121 and the second pressing roller 2122 for the convenience of initial layout.

[0040] Since the modified atmosphere packaging machine has many structural components fixed on the housing 1, in order to prevent the film from being affected by contact with these structural components during movement, in this embodiment, the film feeding system 2 also includes a plurality of fifth turning rollers 213 for guiding the film to avoid the housing 1; the cylinder axis of the fifth turning roller 213 is parallel to the cylinder axis of the fourth turning roller 207; the fifth turning roller 213 is rotatably fixed on the housing 1. The fifth turning roller 213 can serve as a support and guide structure for the film, allowing the film to turn around other structural components of the modified atmosphere packaging machine more flexibly.

[0041] Since the conveyor belt in the existing modified atmosphere packaging machine only needs to be driven by one motor, and if the packaging box conveyor belt 41 and the packaging box separation belt 42 with different belt speeds are driven by two different motors, the cost of the modified atmosphere packaging machine will increase. In order to specifically realize the different belt speeds of the packaging box conveyor belt 41 and the packaging box separation belt 42, in this embodiment, the conveyor belt system also includes an actively rotatable driving roller 43; the packaging box conveyor belt 41 includes a first driven roller 411 and a plurality of annular first circular conveyor belts 412; the packaging box separation belt 42 includes a second driven roller 421 and a plurality of annular second circular conveyor belts 422; the driving roller 43 is provided with a plurality of first grooves 431 and a plurality of second grooves 432; the first grooves 431 and the second groove 432 are arranged at intervals; the spacing between adjacent first grooves 431 and second grooves 432 is equal; the first groove 431 and the second groove 432 are both circular, and the circular axes of the first groove 431 and the second groove 432 are collinear with the axis of the driving roller shaft 43; the bottom diameter of the first groove 431 is smaller than the bottom diameter of the second groove 432; the first circular transmission belt 412 is tightened around the first driven roller shaft 411 and the driving roller shaft 43; each first circular transmission belt 412 is respectively arranged in a first groove 431; the second circular transmission belt 422 is tightened around the second driven roller shaft 421 and the driving roller shaft 43; each second circular transmission belt 422 is respectively arranged in a second groove 432. In this embodiment, a first circular conveyor belt 412 and a second circular conveyor belt 422 are driven by a driving roller shaft 43 (the circular conveyor belt is a prior art, which is disclosed in the printer labeling belt line mechanism disclosed in Chinese patent application No. 202221537027.0). A first groove 431 and a second groove 432 of different diameters are provided on the driving roller shaft 43. When the driving roller shaft 43 rotates one circle, the moving distances of the first circular conveyor belt 412 and the second circular conveyor belt 422 are different. Therefore, the linear speeds of the first circular conveyor belt 412 and the second circular conveyor belt 422 are different. The packaging box is arranged on the first circular conveyor belt 412 and the second circular conveyor belt 42. 2, there is static friction between the packaging box and the first circular conveyor belt 412 and the second circular conveyor belt 422, the moving speed of the packaging box on the first circular conveyor belt 412 and the second circular conveyor belt 422 is consistent with the moving speed of the first circular conveyor belt 412 and the second circular conveyor belt 422, because the diameter of the first groove 431 is smaller than the diameter of the second groove 432, the moving speed of the first circular conveyor belt 412 fixed in the first groove 431 is smaller than the moving speed of the second circular conveyor belt 422 fixed in the second groove 432, and therefore the speed of conveying the packaging box by the packaging box conveyor belt 41 is smaller than the speed of conveying the packaging box by the packaging box separation belt 42.

[0042] In summary, the present invention provides a modified atmosphere packaging machine, which relates to the technical field of modified atmosphere packaging machines, including a film feeding system, a film upper system and a conveyor belt system; the film upper system includes a packaging box moving device, a lifting device, an upper mold and a lower 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; the film feeding system can continuously provide a sealing film to the upper mold and the lower mold between; the conveyor belt system can continuously provide the packaging box to the packaging box moving device; during the process of the lifting device moving the lower mold in the vertical direction, the packaging box moving device can move the packaging box to the lower mold; the conveyor belt system includes a packaging box conveyor belt and a packaging box separation belt; the packaging box conveyor belt and the packaging box separation belt convey the packaging box in a direction from back to front; the packaging box separation belt is connected in front of the packaging box conveyor belt; the packaging box moving device can move the packaging box on the packaging box separation belt to the lower mold; the belt speed of the packaging box separation belt is faster than the belt speed of the packaging box conveyor belt. The modified atmosphere packaging machine provided by the present invention solves the problem in the prior art that the moving device is easy to affect the adjacent packaging boxes when moving the packaging boxes, and can separate the packaging boxes on the conveyor belt, thereby preventing the moving device from contacting the adjacent packaging boxes when moving the packaging boxes.

[0043] 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 by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A modified atmosphere packaging machine, comprising a housing, characterized in that: Including film walking system, film loading system and conveyor belt system; The film loading system includes a packaging box moving device, a lifting device, an upper mold and a lower 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 on 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 located vertically above the lower die; The lifting device can move the lower mold in the vertical direction; The film feeding system can continuously provide the sealing film between the upper mold and the lower mold; the conveyor belt system can continuously provide the packaging box to the packaging box moving device; The conveyor belt system includes a packaging box conveyor belt and a packaging box separation belt; The packaging box conveyor belt and the packaging box separation belt convey the packaging boxes from back to front; The packaging box separation belt is connected in front of the packaging box conveyor belt; the packaging box moving device can move the packaging box on the packaging box separation belt to the lower mold; The belt speed of the packaging box separation belt is faster than the belt speed of the packaging box conveyor belt; The upper die comprises 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 fixing plate through the first spring assembly; the second pressing plate is fixed to the lower bottom surface of the fixing 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 on its surface; the second pressing plate can be slidably fixed in the through hole; 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; The film loading system 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 can be detachably fixed on 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.

2. The modified atmosphere packaging machine according to claim 1, characterized in that: The packaging box moving device comprises a horizontal moving device and a plurality of positioning baffles; the horizontal moving device comprises 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 on 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.

3. The modified atmosphere packaging machine according to claim 1, characterized in that: The film feeding system comprises a film placing roller, a film collecting roller, a motor, a first turning roller, a second turning roller, a third turning roller and a fourth turning roller; The cylinder axes of the film placing roller, the film collecting roller, the first turning roller, the second turning roller, the third turning roller and the fourth turning roller are all parallel; The film placing roller is rotatably fixed on the shell; the motor is fixed on the shell; the film collecting roller is fixed on the rotating shaft of the motor; the motor can drive the film collecting roller to rotate along the cylinder shaft of the film collecting roller; The housing is provided with a slide groove extending in a vertical direction; the first steering roller can be slidably fixed in the slide groove; the first steering roller can rotate along the cylinder axis of the first steering roller in the slide groove; the first steering roller is arranged below the film placing roller; The second turning roller is rotatably fixed on the housing; the second turning roller is arranged above the first turning roller; The third turning roller and the fourth turning roller can be rotatably fixed on the shell; the third turning roller and the fourth turning roller are arranged at the same height; In the horizontal direction, the upper mold and the lower mold are both located between the third turning roller and the fourth turning roller; the upper mold is arranged above the third turning roller and the fourth turning roller; and the lifting device can move the lower mold to below the third turning roller and the fourth turning roller.

4. The modified atmosphere packaging machine according to claim 3, characterized in that: The film feeding system also includes a magnetic powder torque controller, a control system, an encoder and a detection switch capable of identifying the interval length of the color film; The magnetic powder torque controller is fixed to the end of the film placing roller; The encoder is fixed on the housing; the encoder includes a counting ring; the counting ring is tangent to the second steering roller; the rim of the counting ring has the same linear speed as the rim of the second steering roller; The detection switch has a sensing head facing between the second turning roller and the third turning roller; The motor is electrically connected to the control system; The magnetic powder torque controller is electrically connected to the control system; The encoder is electrically connected to the control system; The detection switch is electrically connected to the control system.

5. The modified atmosphere packaging machine according to claim 4, characterized in that: The film feeding system further comprises a film pressing mechanism; the film pressing mechanism comprises a first pressing roller, a second pressing roller and a pressing assembly; Both ends of the first pressing roller can be rotatably fixed on the shell; both ends of the second pressing roller can be rotatably fixed on the shell and the pressing assembly respectively; The roller axes of the first pressing roller and the second pressing roller are parallel to the cylinder axis of the film receiving roller; The clamping assembly is fixed on the housing; The pressing assembly can press the second pressing roller toward the first pressing roller; The second pressing roller comprises a plurality of cylindrical extrusion cylinders; the outer wall of the extrusion cylinder is coated with an anti-skid layer; the anti-skid layer is in contact with the outer wall of the first pressing roller; the outer wall diameter of the anti-skid layer is equal to the diameter of the first pressing roller.

6. The modified atmosphere packaging machine according to claim 5, characterized in that: The film feeding system further comprises a plurality of fifth turning rollers for guiding the film to avoid the shell; the axis of the fifth turning roller is parallel to the axis of the fourth turning roller; the fifth turning roller is rotatably fixed on the shell.

7. The modified atmosphere packaging machine according to claim 6, characterized in that: The conveyor belt system also includes a driving roller shaft that can actively rotate; The packaging box conveyor belt comprises a first driven roller shaft and a plurality of annular first circular conveyor belts; the packaging box separation belt comprises a second driven roller shaft and a plurality of annular second circular conveyor belts; The driving roller shaft is provided with a plurality of first grooves and a plurality of second grooves; the first grooves and the second grooves are arranged at intervals; and the intervals between adjacent first grooves and second grooves are equal; The first groove and the second groove are both annular, and the annular axes of the first groove and the second groove are collinear with the axis of the driving roller shaft; the bottom diameter of the first groove is smaller than the bottom diameter of the second groove; The first circular transmission belt is tightened around the first driven roller and the driving roller; each of the first circular transmission belts is respectively arranged in one of the first grooves; The second circular transmission belt is tightened around the second driven roller and the driving roller; each of the second circular transmission belts is respectively arranged in one of the second grooves.

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