Tray type vegetable preservative film automatic packaging production line

Abstract

The invention relates to the technical field of packaging equipment, and particularly discloses a tray type vegetable preservative film automatic packaging production line which comprises a tape winding mechanism used for continuously supplying a sealing film; the packaging mechanism is arranged above the tape winding mechanism; the two conveying mechanisms which are symmetrically arranged are located on the two sides of the lower portion of the packaging mechanism, each conveying mechanism comprises a plurality of containing boxes which move circularly, and the containing boxes are used for synchronously conveying trays; the packaging mechanism comprises a three-dimensional guide sliding rail set and a plurality of composite guide sliding blocks capable of moving on the three-dimensional guide sliding rail set, and the running speed of the tape winding mechanism and the running speed of the packaging mechanism are matched with the moving speed of the composite guide sliding blocks. The composite guide sliding block is used for providing driving force needed for sealing of the containing box, air exhaust, heat sealing of the tray and cutting of the sealing film. A controllable gas path adjusting device is further arranged on the packaging mechanism and used for supplementing replacement gas into the containing box. The automatic packaging device can efficiently and stably achieve automatic packaging of the tray type vegetable preservative film.

Description

Technical Field

[0001] The invention relates to the technical field of packaging equipment, in particular to a tray-type vegetable cling film automatic packaging production line. Background Art

[0002] In the field of vegetable fresh-keeping packaging, traditional vegetable packaging is mostly manual operation or simple semi-automatic packaging, which is inefficient and difficult to ensure the quality and consistency of packaging. For tray-type vegetable packaging, there is a lack of precise synchronous control mechanism in key processes such as vacuuming, gas replacement and heat sealing cutting, which leads to problems such as loose sealing and insufficient gas replacement, making the shelf life of vegetables short after packaging, and they are easily affected by factors such as oxygen and microorganisms and deteriorate and rot. At the same time, the existing packaging equipment has a low degree of automation in structural design, making it difficult to achieve efficient continuous production and meet the needs of large-scale vegetable packaging. Moreover, during the supply and transportation of the sealing film, deviation, jamming and other situations are prone to occur, affecting the normal packaging. Therefore, a production line is developed that can efficiently and stably realize automatic packaging of tray-type vegetable cling film and effectively extend the shelf life of vegetables. Summary of the invention

[0003] The embodiment of the present application provides a tray-type vegetable cling film automatic packaging production line, the main purpose of which is to efficiently and stably realize the tray-type vegetable cling film automatic packaging, and to provide a production line that can effectively extend the shelf life of vegetables.

[0004] To achieve the above-mentioned purpose, the embodiment of the present application provides a tray-type vegetable cling film automatic packaging production line, comprising: a tape reel mechanism for continuously supplying sealing film; a packaging mechanism, arranged above the tape reel mechanism, for performing vacuuming and heat-sealing and cutting operations on the tray; two symmetrically arranged conveying mechanisms, located on both sides below the packaging mechanism, the conveying mechanism comprising a plurality of cyclically moving placement boxes, the placement boxes being used to synchronously convey the tray; wherein the packaging mechanism comprises a three-dimensional guide rail group and a plurality of composite guide sliders that can move on the three-dimensional guide rail group, the moving direction of the composite guide slider comprising synchronous movement in the horizontal direction and the vertical direction, when the composite guide slider performs synchronous movement in the horizontal direction and the vertical direction, the running speed of the tape reel mechanism and the packaging mechanism matches the moving speed of the composite guide slider, and the composite guide slider is used to provide the driving force required for sealing, exhausting, heat-sealing the tray and cutting the sealing film of the placement box; the packaging mechanism is also provided with a controllable gas path regulating device, which is used to replenish replacement gas into the placement box when the composite guide slider is in the exhaust action on the placement box.

[0005] In a feasible embodiment, the three-dimensional guide rail group includes at least three rails stacked up and down and arranged at intervals, and the three-dimensional guide rail group located at the top layer is provided with an upper inclined protrusion and a first lower inclined protrusion; a second lower inclined protrusion is provided on the lower side rail, and the upper inclined protrusion and the second lower inclined protrusion partially overlap, and each of the guide rails is in a closed state connected end to end; the top composite guide slider can move along the rail path of the top layer.

[0006] In a feasible embodiment, the packaging mechanism includes a support frame, and also includes: a plurality of outer sleeves, all of which are equidistantly installed in the vertical direction on the outside of other slide rails except the top slide rail, and the outer sleeve moves downward when entering the second lower inclined protrusion; a connecting rod, which is arranged in the inner cavity of the outer sleeve and can move up and down in a straight line direction, and the top end of the connecting rod extends to the top of the outer sleeve and is connected to the top composite guide slider; a plurality of upper closing covers, each of which is fixedly arranged at the bottom end of the outer sleeve and can be synchronously buckled on the placement box; a driving component, which is fixedly arranged at the top of the support frame. The driving assembly has a rotatable driving end, and the driving end is transmission-connected to at least one end of the slide rail in the three-dimensional guide slide rail group; the inner sleeve is arranged in the lower half of the inner cavity of the outer sleeve and can be moved in the vertical direction, and a spring is also arranged between the inner sleeve and the outer sleeve, and the spring is used to provide a thrust for the inner sleeve to move up and reset; a connecting plate is fixedly connected to the bottom end of the inner sleeve and can be movably arranged in the upper half of the inner cavity of the upper cover; a heat sealing ring is fixedly arranged at the bottom end of the edge of the connecting plate; a cutting knife is fixedly arranged at the bottom end of the connecting plate outside the cutting knife.

[0007] In a feasible embodiment, the outer sleeve and the upper cover are also provided with: a one-way valve, which is fixedly mounted on the upper cover, and the one-way valve is connected to the controllable air path regulating device; a variable diameter one-way flow guide pipe, which is fixedly mounted on the bottom end of the connecting rod and can be lifted and moved in the inner cavity of the outer sleeve; an elastic sealing member, which can be movably arranged in the inner cavity of the variable diameter one-way flow guide pipe and can seal the bottom end opening of the variable diameter one-way flow guide pipe; and a plurality of exhaust holes, which are opened on the top end surface of the variable diameter one-way flow guide pipe, and are used to exhaust the air displaced between the placement box and the upper cover.

[0008] In a feasible embodiment, the composite guide slider includes: a plurality of connecting sleeves, wherein the connecting sleeve at the top is fixedly sleeved on the outer wall of the connecting rod, and the lower connecting sleeves are fixedly sleeved on the outer wall of the outer sleeve; two rollers form a group, each group of rollers can roll and fit on the two opposite side walls of each slide rail, each of the rollers is provided with an axle rod, and each group of rollers is fixed to the outer wall of the connecting sleeve through the axle rod.

[0009] In a feasible embodiment, the controllable gas path regulating device includes: a connecting pipe, one end of which is connected to the replacement gas output tank; the other end of the connecting pipe extends to the middle of the three-dimensional guide rail group; a rotating frame, which is rotatably arranged in the middle of the top of the three-dimensional guide rail group and is connected to the connecting pipe through a support pipe; a plurality of hard pipes, all of which are connected to the connecting pipe through the rotating frame, and the outer end of each of the hard pipes is also connected to the one-way valve through a hose.

[0010] In a feasible embodiment, the driving assembly includes: at least one reduction motor, fixedly arranged in the end of the three-dimensional guide slide rail group; a pulley, locked on the output end of the reduction motor through a coupling; a plurality of belts, the belts are arranged one-to-one corresponding to the slide rails, the inner side of each belt is movably sleeved in the groove of the pulley, and the outer end of the belt is connected one-to-one with the composite guide slider.

[0011] In a feasible embodiment, the conveying mechanism includes: a circular guide rail conveying line, including a top conveying end, the top conveying end is located directly below the upper inclined protrusion, the first lower inclined protrusion and the second lower inclined protrusion in the three-dimensional guide rail group, and a plurality of equidistant placement boxes are arranged on the circular guide rail conveying line.

[0012] In a feasible embodiment, each of the placement boxes is provided with a product carrying slot for accommodating the tray, the edge of the product carrying slot is a horizontal plane, and the outer end of the horizontal plane is also provided with a film cutting slot matching the shape of the cutting knife.

[0013] In a feasible embodiment, the belt winding mechanism includes a winding end and a release end, and is further provided with: two limit rods, respectively fixed on the winding end and the release end; two winding rods, respectively rotatably arranged in the winding end and the release end outside the limit rods; a sealing film, one end of which is wound around one of the winding rods, the middle part passes through the two limit rods, the packaging mechanism and the conveying mechanism, and the other end is wound around the other winding rod; a stand for supporting the winding end and the release end; at least one servo motor fixed on the stand, and its output end is connected to the winding rod.

[0014] The present application provides a tray-type vegetable cling film automatic packaging production line, which continuously supplies sealing film through a coiling mechanism, quickly conveys the tray through a conveying mechanism, and efficiently completes processes such as vacuuming, heat sealing and cutting through a packaging mechanism, thereby realizing continuous and automated production of vegetable packaging, greatly improving packaging efficiency, and meeting the needs of large-scale vegetable packaging. In terms of fresh-keeping effect, the packaging mechanism can vacuum the tray, and replenish inert gases such as nitrogen into the tray through a controllable gas path regulating device, effectively isolating oxygen, inhibiting the respiration of vegetables, extending the shelf life of vegetables, and reducing the deterioration and loss of vegetables during storage and transportation. In terms of structural design, the setting of a three-dimensional guide rail group and a composite guide slider enables the multi-packaging processes of the coiling mechanism and the packaging mechanism to be completed during the conveying process, while avoiding dislocation or delay during the packaging process. At the same time, the design of the product bearing slot and the film cutting slot in the placement box ensures that the tray is placed stably and the sealing film is cut neatly, thereby improving the quality and efficiency of packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the tray-type vegetable cling film automatic packaging production line of the present invention; Figure 2 It is a structural schematic diagram of the belt winding mechanism of the tray-type vegetable cling film automatic packaging production line of the present invention; Figure 3 It is a structural schematic diagram of the conveying mechanism of the tray-type vegetable cling film automatic packaging production line of the present invention; Figure 4 It is a structural schematic diagram of a placement box of a tray-type vegetable cling film automatic packaging production line of the present invention; Figure 5 It is a structural schematic diagram of a controllable gas path regulating device of a tray-type vegetable cling film automatic packaging production line of the present invention; Figure 6 It is a structural schematic diagram of the packaging mechanism of the tray-type vegetable cling film automatic packaging production line of the present invention; Figure 7 It is a structural schematic diagram of the driving mechanism of the tray-type vegetable cling film automatic packaging production line of the present invention; Figure 8 It is a structural schematic diagram of the connecting rod of the tray-type vegetable cling film automatic packaging production line of the present invention; Fig. 9 It is a structural schematic diagram of a composite guide slider of a tray-type vegetable cling film automatic packaging production line of the present invention; Fig.10 It is a schematic structural diagram of the inner sleeve of the tray-type vegetable cling film automatic packaging production line of the present invention.

[0016] In the figure: 1. Tape winding mechanism, 2. Packaging mechanism, 3. Conveying mechanism, 101. Limit rod, 102. Rewinding rod, 103. Sealing film, 104. Stand, 105. Servo motor, 201, support frame, 202, three-dimensional guide rail group, 203, composite guide slider, 204, upper cover, 205, outer sleeve, 206, connecting rod, 207, controllable gas path adjustment device, 208, drive assembly, 209, one-way valve, 210, variable diameter one-way flow guide pipe, 211, elastic sealing member, 212, exhaust hole, 213, spring, 214, connecting plate, 215, heat sealing ring, 216, cutting knife, 217, inner sleeve, 301, circular guide rail conveyor line, 302, placement box, 303, product carrying slot, 304, film cutting slot, 2031, roller, 2032, shaft, 2033, connecting sleeve, 2071, connecting pipe, 2072, supporting pipe, 2073, rotating frame, 2074, hard pipe, 2081. reduction motor, 2082. belt, 2083. pulley. DETAILED DESCRIPTION

[0017] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0018] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0019] See also Figures 1 to 10 As shown, an embodiment of the present application provides a tray-type vegetable cling film automatic packaging production line, including: a tape winding mechanism 1, a packaging mechanism 2 and two symmetrically arranged conveying mechanisms 3.

[0020] Specifically, the tape reel mechanism 1 is used to continuously supply the sealing film 103; the packaging mechanism 2 is arranged above the tape reel mechanism 1, and is used to perform vacuuming and heat-sealing cutting operations on the tray; two symmetrically arranged conveying mechanisms 3 are located on both sides below the packaging mechanism 2, and the conveying mechanism 3 includes a plurality of cyclically moving placement boxes 302, and the placement boxes 302 are used to synchronously convey the tray; Among them, the packaging mechanism 2 includes a three-dimensional guide rail group 202 and a plurality of composite guide sliders 203 that can move on the three-dimensional guide rail group 202. The moving direction of the composite guide slider 203 includes synchronous movement in the horizontal direction and the vertical direction. When the composite guide slider 203 performs synchronous movement in the horizontal direction and the vertical direction, the running speed of the winding mechanism 1 and the packaging mechanism 2 matches the moving speed of the composite guide slider 203, and the composite guide slider 203 is used to provide the driving force required for sealing, vacuuming, heat sealing the tray and cutting the sealing film 103 of the placement box 302; a controllable gas path regulating device 207 is also provided on the packaging mechanism 2, which is used to replenish replacement gas into the placement box 302 when the composite guide slider 203 is in the vacuuming action on the placement box 302.

[0021] When working, the tape winding mechanism 1 continuously supplies the sealing film 103 to provide materials for subsequent packaging. The two symmetrically arranged conveying mechanisms 3 are located on both sides below the packaging mechanism 2, and their function is to convey the trays containing vegetables to the designated position below the packaging mechanism 2. The multiple cyclically moving placement boxes 302 of the conveying mechanism 3 are used to place the trays so that they can complete the environmental sealing, ventilation, heat plastic sealing and cutting processes in sequence according to the established process during the moving conveying process. When the tray enters the working area of ​​the packaging mechanism 2, the composite guide slider 203 performs oblique movement on the three-dimensional guide rail group 202. During this process, the running speeds of the winding mechanism 1 and the packaging mechanism 2 match the moving speed of the composite guide slider 203, ensuring that the supply of the sealing film 103, heat sealing and cutting and other operations are coordinated with the movement of the tray without misalignment or delay. At the same time, the composite guide slider 203 is driven in reverse by a slide rail of a specific shape, so that the driving force required for sealing, exhausting, heat sealing of the tray and cutting of the sealing film 103 of the placement box 302 can be achieved. Extracting air helps to replace inert gas to extend the shelf life of vegetables. The controllable air path regulating device 207 on the packaging mechanism 2 will replenish replacement gas, such as inert gas such as nitrogen, into the tray during the exhaust action, further isolate oxygen, and inhibit the respiration of vegetables, ultimately achieving automatic and efficient packaging of vegetables with plastic wrap in the tray, and good preservation effect after packaging.

[0022] like Figure 1 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, in some examples, further, the three-dimensional guiding rail group 202 includes at least three rails stacked up and down and arranged at intervals, and the three-dimensional guiding rail group 202 located at the top layer is provided with an upper inclined protrusion and a first lower inclined protrusion; a second lower inclined protrusion is provided on the lower side rail, and the upper inclined protrusion and the second lower inclined protrusion partially overlap, and each guide rail is in a closed state connected end to end; the top composite guiding slider 203 can move along the rail path of the top layer.

[0023] In this example, at least three slide rails of the three-dimensional guide rail group 202 are stacked and arranged at intervals to provide a multi-dimensional moving path for the composite guide slider 203. The uppermost slide rail is provided with an upper inclined protrusion and a first lower inclined protrusion, and a second lower inclined protrusion on the lower slide rail, wherein the upper inclined protrusion and the first lower inclined protrusion cooperate with each other to realize the movement path of the uppermost composite guide slider 203, wherein the purpose of the upper inclined protrusion is to drive the uppermost composite guide slider 203 to rise to realize the air extraction action, and the purpose of the first lower inclined protrusion is to produce a cutting action. The purpose of the second lower inclined protrusion is to realize the downward movement of the upper cover 204, so that the upper cover 204 can be buckled and sealed on the placement box 302; the upper inclined protrusion and the second lower inclined protrusion partially overlap, so that the placement box 302 is already in a sealed state during the air extraction process, and then the air extraction is performed, so the two actions are coordinated at the same time. Since each guide rail is in a closed state connected end to end, each composite guide slider 203 can continuously move in a cycle along the slide rail path, ensuring the continuity of the entire packaging process. When vegetable trays are packaged with cling film, multiple composite guide sliders 203 move along a preset route on the three-dimensional guide rail group 202 to perform the above-mentioned actions as needed, and cooperate with the winding mechanism 1 to supply the sealing film 103 and the packaging mechanism 2 to perform vacuuming and heat-sealing cutting operations, so that the trays can flow in an orderly manner between the various processes, greatly improving the efficiency and stability of automatic packaging of vegetables with cling film, so that the vegetable packaging is well sealed and kept fresh for a long time.

[0024] like Figures 5 to 10As shown, in some examples, further, the packaging mechanism 2 includes a support frame 201, and also includes: multiple upper covers 204, multiple outer sleeves 205, connecting rods 206, drive components 208, connecting plates 214, heat sealing rings 215, cutting knives 216 and inner sleeves 217; multiple outer sleeves 205 are equidistantly installed on the outside of other slide rails except the uppermost slide rail in the vertical direction, and the outer sleeve 205 moves downward when entering the second lower inclined protrusion; the connecting rod 206 is arranged in the inner cavity of the outer sleeve 205 so as to be able to move up and down in a straight line direction, and the top end of the connecting rod 206 extends to the top of the outer sleeve 205 and is connected to the uppermost composite guide slider 203; each upper cover 204 is fixedly arranged at the bottom end of the outer sleeve 205, and can be synchronously buckled on the placement box 3 02; the driving component 208 is fixedly arranged at the top of the support frame 201, and the driving component 208 has a rotatable driving end, and the driving end is transmission-connected to at least one slide rail end in the three-dimensional guide slide rail group 202; the inner sleeve 217 is arranged in the lower half of the inner cavity of the outer sleeve 205 and can be moved in the vertical direction. The inner sleeve 217 and the outer sleeve 205 are connected by a spring 213, and the spring 213 is used to provide a thrust for the inner sleeve 217 to move upward and reset; the connecting plate 214 is fixedly connected to the bottom end of the inner sleeve 217 and can be movably arranged in the upper half of the inner cavity of the upper cover 204; the heat sealing ring 215 is fixedly arranged at the bottom end of the edge of the connecting plate 214; the cutting knife 216 is fixedly arranged at the bottom end of the connecting plate 214 outside the cutting knife 216.

[0025] In this example, the support frame 201 plays a basic role in firmly supporting the various components of the packaging mechanism 2; multiple upper covers 204 are used to buckle on the placement box 302 at a specific time to close the tray and prevent gas leakage during vacuuming, heat sealing and other operations; the outer sleeve 205 is equidistantly installed on the outside of the corresponding slide rail in the vertical direction, and it moves downward when entering the second lower inclined convex portion, and is linked with the lower composite guide slider 203 to complete multiple action conversions; the connecting rod 206 can move up and down in a straight line and is placed in the inner cavity of the outer sleeve 205, and the top end is connected to the uppermost composite guide slider 203, so that it moves synchronously in the inner cavity of the outer sleeve 205 following the position of the uppermost composite guide slider 203 to achieve the air extraction action; the driving component 208 is fixed to the top of the support frame 201, and its rotating driving end is connected to at least one end of the slide rail to provide power for the movement of the slide rail and the components attached thereto, and ensure the overall circulation operation; the inner sleeve 217 can be moved in the vertical direction and is arranged in the lower half of the inner cavity of the outer sleeve 205, and the spring 213 between the two is the inner sleeve 2 17 provides an upward reset thrust, so that the cutting knife 216 below can automatically reset after the pressure-downward cutting action is completed; the connecting plate 214 is fixed to the bottom end of the inner sleeve 217 and movably placed in the upper half of the inner cavity of the upper cover 204, serving as a bearing component for the heat sealing ring 215 and the cutting knife 216; the heat sealing ring 215 is fixed to the bottom end of the edge of the connecting plate 214, and is used to heat and seal the contact part between the sealing film 103 and the tray to ensure the sealing of the packaging; the cutting knife 216 is fixed to the bottom end of the outer side of the connecting plate 214, and is After the heat sealing is completed, the sealing film 103 is cut off to complete the packaging of a single tray; when the production line is started, the driving component 208 drives the slide rail to operate, and the top composite guide slider 203 moves with the connecting rod 206, the outer sleeve 205 and other components to reach the specified position, the upper cover 204 is buckled, and the inner sleeve 217 is pushed by the spring 213 to cooperate with the heat sealing ring 215 for heat sealing and the cutting knife 216 for cutting. This cycle is repeated to efficiently and accurately realize the vacuum heat sealing packaging of the vegetable tray, extend the shelf life of the vegetables, and improve the packaging quality and efficiency.

[0026] like Fig.10 As shown, in some examples, further, the outer sleeve 205 and the upper cover 204 are also provided with: a one-way valve 209, a variable-diameter one-way flow guide tube 210, an elastic seal 211 and a plurality of exhaust holes 212; the one-way valve 209 is fixedly arranged on the upper cover 204, and the one-way valve 209 is connected to the controllable air path adjustment device 207; the variable-diameter one-way flow guide tube 210 is fixedly arranged on the bottom end of the connecting rod 206, and can be arranged in the inner cavity of the outer sleeve 205 so as to be able to be lifted and moved; the elastic seal 211 can be movably arranged in the inner cavity of the variable-diameter one-way flow guide tube 210, and can seal the bottom end opening of the variable-diameter one-way flow guide tube 210; a plurality of exhaust holes 212 are opened on the top end surface of the variable-diameter one-way flow guide tube 210, for discharging the air displaced between the placement box 302 and the upper cover 204.

[0027] In this example, the one-way valve 209 is fixed on the upper cover 204 and connected to the controllable gas path regulating device 207, which can control the one-way flow of gas and is used in the pumping and inflation process to ensure that the process of replenishing and replacing gas in the tray is smooth and prevent gas backflow. The variable diameter one-way flow guide tube 210 is fixed to the bottom end of the connecting rod 206 and can move up and down with the connecting rod 206 to provide a channel for gas flow. The elastic seal 211 is movably arranged in the inner cavity of the variable diameter one-way flow guide tube 210 and can block the bottom opening. When the uppermost composite guide slider 203 drives the connecting rod 206 to rise, the elastic seal 211 blocks the opening to facilitate pumping.

[0028] The workflow is as follows: the production line is started, the lower composite guide slider 203 drives the outer sleeve 205 to descend, the upper cover 204 is buckled on the placement box 302, and then the connecting rod 206 is driven to rise under the displacement of the uppermost composite guide slider 203, the elastic seal 211 blocks the bottom opening of the variable diameter one-way guide tube 210, and the inner cavity of the tray is evacuated during the rising process of the connecting rod 206. At the same time, the supplementary replacement gas enters, and the supplementary replacement gas is sent in through the controllable gas path adjustment device 207, wherein the gas is sent into the placement box 302 through the one-way valve 209. After the heat sealing and cutting actions are completed, the connecting rod 206 is reset, and at the same time, the elastic seal 211 is opened under the action of air pressure, and the gas is sent out through the exhaust hole 212, and the connecting rod 206 is reset to prepare for the next packaging.

[0029] like Figure 8 As shown, in some examples, further, the composite guide slider 203 includes: a roller 2031, a shaft 2032 and a plurality of connecting sleeves 2033; the plurality of connecting sleeves 2033, wherein the uppermost connecting sleeve 2033 is fixedly sleeved on the outer wall of the connecting rod 206, and the lower connecting sleeves 2033 are fixedly sleeved on the outer wall of the outer sleeve 205; two rollers 2031 form a group, and each group of rollers 2031 can roll and fit on two opposite side walls of each slide rail, and a shaft 2032 is arranged in each roller 2031, and each group of rollers 2031 is fixed to the outer wall of the connecting sleeve 2033 through the shaft 2032.

[0030] In this example, in order to realize the continuous and smooth movement of the composite guide slider 203, the connecting rod 206 is driven to move, so a connecting sleeve 2033 is provided. The connecting sleeve 2033 at the top is fixedly sleeved on the outer wall of the connecting rod 206, and the composite guide slider 203 at the bottom is sleeved on the outer wall of the outer sleeve 205, ensuring that the connecting rod 206 and the outer sleeve 205 can stably link with the composite guide slider 203. The rollers 2031 are the key parts for realizing the smooth movement of the composite guide slider 203. Two rollers 2031 form a group, and each group of rollers 2031 can roll tightly against the two opposite side walls of each slide rail, greatly reducing the friction of the composite guide slider 203 when the three-dimensional guide rail group 202 moves, so that the slider can move smoothly and efficiently along the preset slide rail path.

[0031] like Figure 5 As shown, in some examples, further, the controllable gas path regulating device 207 includes: a connecting pipe 2071, a supporting pipe 2072, a rotating frame 2073 and a plurality of hard pipes 2074, one end of the connecting pipe 2071 is connected to the replacement gas output tank; the other end of the connecting pipe 2071 extends to the middle of the three-dimensional guide rail group 202; the rotating frame 2073 is rotatably arranged in the middle of the top of the three-dimensional guide rail group 202, and is connected to the connecting pipe 2071 through the supporting pipe 2072; the plurality of hard pipes 2074 are all connected to the connecting pipe 2071 through the rotating frame 2073, and the outer end of each hard pipe 2074 is also connected to the one-way valve 209 through a hose.

[0032] In the automatic packaging production line of vegetable tray cling film, the controllable gas path regulating device 207 is used to provide replacement gas. Specifically, it includes a gas tank and a connecting pipe 2071 connected to the gas tank. The connecting pipe 2071 is used to transport replacement gas to the packaging device. The connecting pipe 2071 extends to the middle of the three-dimensional guide rail group 202 to provide a channel for gas transmission. The support pipe 2072 fixes the rotating frame 2073 and connects to the connecting pipe 2071 to ensure that the gas can flow smoothly from the connecting pipe 2071 to the rotating frame 2073. The rotating frame 2073 is rotatably arranged in the middle of the top of the three-dimensional guide rail group 202, and can rotate with all the upper covers 204. It can also serve as a hub for gas distribution, evenly distributing the gas flowing in from the connecting pipe 2071 to each hard tube 2074. Multiple hard tubes 2074 are connected to the connecting tube 2071 through the rotating frame 2073 to transmit the replacement gas to different positions. The outer end of each hard tube 2074 is connected to the one-way valve 209 through a hose, and finally the replacement gas is delivered to the placement box 302 and the tray in the upper cover 204.

[0033] like Figure 7As shown, in some examples, further, the driving component 208 includes: at least one reduction motor 2081, multiple belts 2082 and pulleys, at least one reduction motor 2081 is fixedly arranged at the end of the three-dimensional guide slide rail group 202; the pulley is locked on the output end of the reduction motor 2081 through a coupling; the belts 2082 are arranged one by one with the slide rails, the inner side of each belt 2082 is movably sleeved in the groove of the pulley, and the outer end of the belt 2082 is connected to the composite guide slider 203.

[0034] In the automatic packaging production line of vegetable tray cling film, the reduction motor 2081 is fixed in the end of the three-dimensional guide rail group 202. As a power source, it can reduce the rotation speed and increase the torque, providing stable and suitable power for the entire system. The pulley is locked at the output end of the reduction motor 2081 through a coupling, and will rotate with the rotation of the output end of the reduction motor 2081. The belt 2082 corresponds to the slide rail one by one, and the inner movable sleeve is in the groove of the pulley, which can be driven when the pulley rotates to realize power transmission. The outer end of the belt 2082 is connected to the composite guide slider 203 one by one, so that the power of the reduction motor 2081 can be transmitted to the connecting rod 206 and the outer sleeve 205 respectively, so that it can realize periodic cyclic rotation.

[0035] like Figure 6 As shown, in some examples, further, the conveying mechanism 3 includes: a circular guide rail conveyor line 301 is arranged in a vertical direction, the top conveying end of the circular guide rail conveyor line 301 is located directly below the upper inclined protrusion, the first lower inclined protrusion and the second lower inclined protrusion in the three-dimensional guide slide rail group 202, and a plurality of equidistant placement boxes 302 are arranged on the circular guide rail conveyor line 301.

[0036] In this example, a placement box 302 is provided on the circular guide rail conveyor line 301 of the conveying mechanism 3. The circular guide rail conveyor line 301 is arranged in the vertical direction, and its top conveying end is located directly below the upper inclined convex part, the first lower inclined convex part and the second lower inclined convex part of the three-dimensional guide rail group 202, providing a track for the tray conveying. A plurality of equidistant placement boxes 302 are arranged on the circular guide rail conveyor line 301 for placing trays loaded with vegetables.

[0037] During operation, the circular guide rail conveyor line 301 starts to operate, driving the placement box 302 and the tray inside it to move. When the placement box 302 moves to the top conveying end of the circular guide rail conveyor line 301, that is, directly below the corresponding convex part of the three-dimensional guide slide group 202, the packaging mechanism 2 starts to work. The composite guide slider 203 moves on the three-dimensional guide slide group 202, and the upper cover 204 is preferentially buckled on the placement box 302, followed by vacuuming, heat sealing cutting and other operations. At the same time, the controllable gas path regulating device 207 replenishes replacement gas into the tray through the one-way valve 209, etc. After the operation is completed, the circular guide rail conveyor line 301 continues to drive the placement box 302 and the packaged tray to leave the packaging area, and new placement boxes 302 and trays enter, and the cycle continues.

[0038] like Figure 4 As shown, in some examples, further, each placement box 302 is provided with a product carrying slot 303 for accommodating a tray, the edge of the product carrying slot 303 is a horizontal plane, and the outer end of the horizontal plane is also provided with a film cutting slot 304 matching the shape of the cutting knife 216.

[0039] In this example, a product carrying groove 303 and a film cutting groove 304 are provided in the placement box 302. The product carrying groove 303 is used to stably accommodate the tray, and its edge is designed as a horizontal plane, which can ensure that the tray is in a horizontal and stable state when placed, avoiding shaking and displacement in subsequent packaging operations, so that heat sealing, vacuuming and other processes can be accurately implemented. The film cutting groove 304 is opened at the outer end of the horizontal plane and matches the shape of the cutting knife 216. When the packaging mechanism 2 runs to this link, the cutting knife 216 falls and can be embedded in the film cutting groove 304, cutting the sealing film 103 cleanly and neatly, so as to avoid accidentally cutting the tray or other parts, and making the edges of the sealing film 103 neat after cutting, and the appearance of the completed vegetable tray packaging is neat.

[0040] like Figure 2 As shown, in some examples, further, the tape winding mechanism 1 includes a winding end and a release end, and is further provided with: two limit rods 101, two winding rods 102, a sealing film 103, a stand 104 and at least one servo motor 105; the two limit rods 101 are fixedly arranged on the winding end and the release end respectively; the two winding rods 102 are rotatably arranged in the winding end and the release end outside the limit rods 101 respectively; one end of the sealing film 103 is wound around one of the winding rods 102, the middle part passes through the two limit rods 101, the packaging mechanism 2 and the conveying mechanism 3, and the other end is wound around the other winding rod 102; the stand 104 is used to support the winding end and the release end; at least one servo motor 105 is fixed on the stand 104, and its output end is connected to the winding rod 102.

[0041] In this example, the belt winding mechanism 1 serves as a conveying device for the sealing film 103. Among them, the stand 104 serves as a basic supporting structure, supporting the winding end and the releasing end. Two limit rods 101 are respectively fixed on the winding end and the releasing end, and their function is to accurately limit the moving path of the sealing film 103, prevent the sealing film 103 from deflecting or shaking during operation, and ensure that the sealing film 103 can accurately pass through the packaging mechanism 2 and the conveying mechanism 3. The two winding rods 102 are rotatably arranged on the outside of the limit rods 101, and are the components for winding and releasing the sealing film 103. One end of the sealing film 103 is wound around one of the winding rods 102, and the middle part passes through each mechanism in sequence. The other end is wound around the other winding rod 102, and the winding rod 102 is driven to rotate by at least one servo motor 105 to realize the continuous supply and recovery of the sealing film 103. The servo motor 105 is fixed on the stand 104, and its output end is connected to the reeling rod 102. It can control the rotation speed of the reeling rod 102 according to the running speed of the packaging mechanism 2. When the packaging mechanism 2 performs operations such as heat sealing and cutting, the servo motor 105 adjusts the rotation of the reeling rod 102 as needed, so that the conveying speed of the sealing film 103 is perfectly matched with the moving speed of the composite guide slider 203 and the working rhythm of the packaging mechanism 2, thereby ensuring that the sealing film 103 is supplied in time without causing material waste.

[0042] The working principle of the tray-type vegetable cling film automatic packaging production line is as follows: After the production line is started, the two symmetrically arranged conveying mechanisms 3 convey the trays loaded with vegetables equidistantly to the bottom of the packaging mechanism 2 through the circular guide rail conveyor line 301. When the placement box 302 moves to the top conveying end of the circular guide rail conveyor line 301, that is, directly below the upper inclined protrusion, the first lower inclined protrusion and the second lower inclined protrusion in the three-dimensional guide slide group 202, the packaging work begins.

[0043] The reduction motor 2081 in the driving assembly 208 drives the three-dimensional guide rail group 202 to circulate through the belt 2082 and the pulley, and the uppermost composite guide slider 203 moves along the uppermost slide path under the guidance of the three-dimensional guide rail group 202. When the lower composite guide slider 203 drives the outer sleeve 205 to enter the second lower inclined convex portion, the upper cover 204 moves downward and snaps onto the placement box 302 to complete the sealing of the placement box 302, thereby preventing gas leakage during subsequent vacuuming, heat sealing and other operations.

[0044] When the top composite guide slider 203 enters the upper inclined convex part, it drives the connecting rod 206 to rise. At this time, the variable diameter one-way flow guide tube 210 rises with the connecting rod 206, and the elastic seal 211 blocks the bottom opening of the variable diameter one-way flow guide tube 210, which is convenient for pumping air from the inner cavity of the tray. At the same time, the controllable gas path adjustment device 207 starts to work, and the connecting tube 2071 transports the replacement gas from the gas tank to the rotating frame 2073. The rotating frame 2073 serves as a gas distribution hub to evenly distribute the gas to each hard tube 2074, and then through the hose through the one-way valve 209, the replacement gas is sent to the tray in the placement box 302 to achieve air replacement and extend the shelf life of vegetables. In this process, the servo motor 105 of the winding mechanism 1 drives the winding rod 102 to rotate, so that the sealing film 103 is transported to the packaging area at a rhythm matching the moving speed of the composite guide slider 203.

[0045] When the top composite guide slider 203 reaches the second lower inclined convex part, the connecting rod 206 descends (below the default height), pushing the inner sleeve 217 downward. The inner sleeve 217 drives the connecting plate 214, and the heat sealing ring 215 on the connecting plate 214 performs heat-pressure sealing on the sealing film 103 and the edge of the tray to ensure the sealing of the packaging. At the same time, the cutting knife 216 fixed on the outer bottom end of the connecting plate 214 cuts into the film cutting groove 304 of the outer end of the horizontal plane of the edge of the placement box 302, which matches the shape of the cutting knife 216, and cleanly cuts the sealing film 103 to complete the packaging of a single tray.

[0046] After the cutting action is completed, the inner sleeve 217, the cutting knife 216 and the heat sealing ring 215 move upward and reset under the action of the spring 213, and the upper cover 204 is separated from the placement box 302 under the action of the return shape of the tail end of the second lower inclined protrusion. The packaged tray moves out of the packaging area along the circular guide conveyor line 301, and a new tray with vegetables enters. The whole process is repeated to realize continuous vacuum air conditioning packaging of vegetables, ensuring the efficiency, sealing and preservation of packaging.

[0047] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A tray-type vegetable cling film automatic packaging production line, characterized in that: include: A belt reel mechanism (1) for continuously supplying a sealing film (103); A packaging mechanism (2) is arranged above the tape winding mechanism (1) and is used to perform vacuuming and heat-sealing cutting operations on the tray; Two symmetrically arranged conveying mechanisms (3) are located on both sides below the packaging mechanism (2), the conveying mechanism (3) comprising a plurality of cyclically moving placement boxes (302), the placement boxes (302) being used to synchronously convey the tray; The packaging mechanism (2) comprises a three-dimensional guide rail group (202) and a plurality of composite guide sliders (203) capable of moving on the three-dimensional guide rail group (202); the moving direction of the composite guide slider (203) comprises synchronous movement in the horizontal direction and the vertical direction; when the composite guide slider (203) performs synchronous movement in the horizontal direction and the vertical direction, the running speed of the tape winding mechanism (1) and the packaging mechanism (2) matches the moving speed of the composite guide slider (203); and the composite guide slider (203) is used to provide the driving force required for sealing the placing box, vacuuming, heat sealing the tray and cutting the sealing film; The packaging mechanism (2) is also provided with a controllable gas path regulating device (207) for replenishing replacement gas into the placement box when the composite guide slider (203) is in the process of evacuating gas from the placement box.

2. The tray-type vegetable cling film automatic packaging production line according to claim 1 is characterized by: The three-dimensional guide rail group (202) comprises at least three rails stacked up and down and arranged at intervals, the three-dimensional guide rail group (202) located at the top layer is provided with an upper inclined protrusion and a first lower inclined protrusion; the lower rail is provided with a second lower inclined protrusion, the upper inclined protrusion and the second lower inclined protrusion partially overlap, and each of the guide rails is in a closed state connected end to end; The uppermost composite guide sliding block (203) is capable of moving along the uppermost slide rail path.

3. The tray-type vegetable cling film automatic packaging production line according to claim 2 is characterized in that: The packaging mechanism (2) comprises a support frame (201), and further comprises: A plurality of outer sleeves (205) are equidistantly mounted along the vertical direction on the outside of other slide rails except the uppermost slide rail, and the outer sleeves (205) move downward when entering the second lower inclined protrusion; A connecting rod (206) is disposed in the inner cavity of the outer sleeve (205) and is capable of lifting and lowering in a linear direction. The top end of the connecting rod (206) extends above the outer sleeve (205) and is connected to the uppermost composite guide slider (203); A plurality of upper closing covers (204), each of the upper closing covers (204) being fixedly disposed at the bottom end of the outer sleeve (205) and capable of being synchronously buckled onto the placement box (302); A driving assembly (208) is fixedly arranged at the top end of the support frame (201), the driving assembly (208) having a rotatable driving end, the driving end being drivingly connected to at least one end of a slide rail in the three-dimensional guide slide rail group (202); An inner sleeve (217) is arranged in the lower half of the inner cavity of the outer sleeve (205) and is movable in a vertical direction. A spring (213) is also arranged between the inner sleeve (217) and the outer sleeve (205). The spring (213) is used to provide a thrust for the inner sleeve (217) to move upward and reset. A connecting plate (214) fixedly connected to the bottom end of the inner sleeve (217) and movably disposed in the upper inner cavity of the upper cover (204); A heat sealing ring (215) fixedly arranged at the bottom end of the edge of the connecting plate (214); A cutting knife (216) is fixedly arranged at the bottom end of the connecting plate (214) outside the cutting knife (216).

4. The tray-type vegetable cling film automatic packaging production line according to claim 3 is characterized in that: The outer sleeve (205) and the upper cover (204) are also provided with: A one-way valve (209) is fixedly mounted on the upper cover (204), and the one-way valve (209) is connected to the controllable gas path regulating device (207); A variable diameter one-way flow guide tube (210) fixedly disposed on the bottom end of the connecting rod (206) and disposed in the inner cavity of the outer sleeve (205) so as to be movable in a lifting manner; An elastic sealing member (211) is movably disposed in the inner cavity of the variable-diameter one-way flow guide tube (210) and is capable of sealing the bottom end opening of the variable-diameter one-way flow guide tube (210); A plurality of exhaust holes (212) are provided on the top end surface of the variable diameter one-way air guide tube (210) and are used to exhaust the air displaced between the placement box (302) and the upper cover (204).

5. The tray-type vegetable cling film automatic packaging production line according to claim 4 is characterized in that: The composite guide slider (203) comprises: A plurality of connecting sleeves (2033), wherein the connecting sleeve (2033) located at the top is fixedly sleeved on the outer wall of the connecting rod (206), and the connecting sleeves (2033) at the bottom are fixedly sleeved on the outer wall of the outer sleeve (205); Two rollers (2031) form a group, and each group of rollers (2031) can roll and fit on two opposite side walls of each slide rail. A shaft rod (2032) is provided in each of the rollers (2031), and each group of rollers (2031) is fixed to the outer wall of the connecting sleeve (2033) via the shaft rod (2032).

6. The tray-type vegetable cling film automatic packaging production line according to claim 4 is characterized in that: The controllable gas path regulating device (207) comprises: A connecting pipe (2071), one end of the connecting pipe (2071) being connected to the replacement gas output tank; the other end of the connecting pipe (2071) extending to the middle of the three-dimensional guide rail assembly (202); A rotating frame (2073) is rotatably disposed at the middle of the top end of the three-dimensional guide rail assembly (202) and is connected to the connecting pipe (2071) via a supporting pipe (2072); A plurality of hard tubes (2074) are all connected to the connecting tube (2071) via the rotating frame (2073), and the outer end of each hard tube (2074) is also connected to the one-way valve (209) via a hose.

7. The tray-type vegetable cling film automatic packaging production line according to claim 4 is characterized by: The driving assembly (208) comprises: At least one reduction motor (2081) fixedly arranged in the end of the three-dimensional guide rail assembly (202); A pulley (2083) is locked on the output end of the reduction motor (2081) via a coupling; A plurality of belts (2082) are provided corresponding to the slide rails one by one, the inner side of each belt (2082) is movably sleeved in the groove of the pulley (2083), and the outer ends of the belts (2082) are connected one by one to the composite guide sliders (203).

8. The tray-type vegetable cling film automatic packaging production line according to claim 4 is characterized by: The conveying mechanism (3) comprises: The annular guide rail conveyor line (301) comprises a top conveyor end, the top conveyor end being located directly below the upper inclined convex portion, the first lower inclined convex portion and the second lower inclined convex portion of the three-dimensional guide rail group (202), and a plurality of equidistant placement boxes (302) are arranged on the annular guide rail conveyor line (301).

9. The tray-type vegetable cling film automatic packaging production line according to claim 8 is characterized in that: Each of the placement boxes (302) is provided with a product carrying slot (303) for accommodating a tray, the edge of the product carrying slot (303) being a horizontal plane, and the outer end of the horizontal plane is also provided with a film cutting slot (304) matching the shape of the cutting knife (216).

10. The tray-type vegetable cling film automatic packaging production line according to claim 1 is characterized in that: The belt winding mechanism (1) comprises a winding end and a releasing end, and is further provided with: Two limiting rods (101) are respectively fixedly arranged on the winding end and the releasing end; Two reeling rods (102) are respectively rotatably arranged inside the reeling end and the releasing end outside the limiting rod (101); A sealing film (103), one end of which is wound around one of the reeling rods (102), a middle portion of which passes through the two limit rods (101), the packaging mechanism (2) and the conveying mechanism (3), and the other end of which is wound around the other reeling rod (102); A stand (104) for supporting the winding end and the releasing end; At least one servo motor (105) is fixed on the stand (104), and its output end is connected to the reeling rod (102).

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