Environmentally friendly paper lunch box trimming equipment

Abstract

An environmentally friendly paper lunch box trimming device includes a punching mechanism, a trimming upper die and a driving member. The punching mechanism includes a machine tool, a punching plate, a positioning lower die, a trimming upper die and a driving member. The machine tool is provided with a workbench. The trimming upper die is arranged toward the positioning lower die. The positioning lower die and the trimming upper die are both connected to an air pump. The transfer mechanism includes a conveyor belt, a displacement component, a flip component, an adsorption manipulator and a push plate. The displacement component is arranged on the conveyor belt. The flip component is used to drive the adsorption manipulator to rotate. The displacement component is used to drive the adsorption manipulator to move back and forth between the conveyor belt and the machine tool. The positioning lower die and the trimming upper die can both adsorb the lunch box. When trimming, the positioning lower die adsorbs and positions the lunch box. When opening the mold, the trimming upper die lifts the lunch box away, which saves the manipulator action steps and separates the lunch box from the cut trimming material. When the adsorption manipulator extends into the machine tool, the push plate sweeps over the positioning lower die to push the trimming material into the trimming collection box.

Description

Technical Field

[0001] The invention relates to the field of paper tableware production, in particular to an environmentally friendly paper lunch box edge trimming device. Background Art

[0002] In recent years, the takeaway industry has developed rapidly in my country. More and more people choose to use APP to order takeaway. With the rise of the takeaway industry, the use of disposable lunch boxes for food has also increased sharply. Among them, paper lunch boxes have the advantages of low manufacturing cost, easy recycling, and low environmental pollution. Therefore, the market demand for paper lunch boxes is increasing. The preparation of paper lunch boxes includes the preparation of pulp, dehydration molding, hot pressing, trimming and disinfection.

[0003] The shape of the paper lunch box is basically fixed after dehydration molding, hot pressing and other processes. At this time, there is residual edge material on the edge of the paper lunch box. In order to ensure the consistency of the size of the lunch box and facilitate its packaging and shipment, the edge material of the paper lunch box that has been shaped needs to be cut off. The trimming process is carried out on the trimming equipment.

[0004] It can be understood that after the lunch box is cut, the cut edge material will remain near the positioning part of the equipment. Before performing the trimming operation again, the trimming equipment needs to be cleaned, otherwise the edge material remaining on the equipment will affect the normal trimming process and hinder the lunch box from being placed normally in the positioning part of the trimming equipment.

[0005] Generally, before placing the lunch box into the trimming device, it is necessary to use an air gun to blow air to the positioning part of the trimming device, and blow away the edge material remaining in the positioning part with high-pressure gas. That is, before each edge material cutting operation, a blowing operation is required.

[0006] However, when removing the edge material by high-pressure gas, it is difficult to control the direction of the edge material, and the blown edge material cannot be recovered normally. In addition, the existence of the blowing process makes the edge material cutting operation discontinuous, affecting the efficiency of shaping the edge of the lunch box. Therefore, how to improve the equipment structure and improve the problem of difficulty in removing the edge material is the key to improving the production efficiency of paper lunch boxes and improving the quality of paper lunch box production. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an environmentally friendly paper lunch box trimming device, wherein the material discharge position of the device is set on the side of a machine tool, a component for removing edge materials is provided on a material taking mechanism, and after the edge trimming operation of the lunch box is completed, the lunch box is lifted by the edge trimming component to keep the lunch box away from the edge materials, and the material taking mechanism enters the machine tool to take the lunch box and pushes the edge materials away at the same time, thereby combining the edge material removal operation and the material taking operation together, shortening the total time consumption of the edge material cutting process and improving the edge trimming efficiency.

[0008] The objective of the present invention is achieved through the following technical solutions:

[0009] An environmentally friendly paper lunch box trimming device comprises: a punching mechanism, a trimming collection box and a transfer mechanism;

[0010] The stamping mechanism includes a machine tool, a punch plate, a positioning lower die, a trimming upper die and a driving member, the machine tool is provided with a workbench, the positioning lower die is arranged on the workbench, the punch plate is slidably arranged on the machine tool, and the punch plate is located directly above the workbench, the trimming upper die is installed on the punch plate, and the trimming upper die is arranged toward the positioning lower die, the positioning lower die and the trimming upper die are both connected to an air pump, and the driving member is arranged on the machine tool for driving the trimming upper die to reciprocate in a direction close to or away from the positioning lower die;

[0011] The edge material collecting box is arranged on one side of the machine tool;

[0012] The transfer mechanism includes a conveyor belt, a displacement component, a flip component, an adsorption manipulator and a push plate. The conveyor belt is arranged on a side of the machine tool away from the edge material collection box, and a gap is arranged between the conveyor belt and the machine tool. The displacement component is arranged on the conveyor belt, and the flip component is installed on the displacement component. The adsorption manipulator is arranged on the flip component. The flip component is used to drive the adsorption manipulator to rotate, and the displacement component is used to drive the adsorption manipulator to move back and forth between the conveyor belt and the machine tool. The push plate is arranged on a side of the pushing manipulator close to the machine tool, and the push plate is used to push the edge material to move toward the edge material collection box.

[0013] In one embodiment, the adsorption robot includes a support frame and a plurality of adsorption plates, the support frame is mounted on the flip assembly, the plurality of adsorption plates are spaced apart on the support frame, each of the adsorption plates is used to adsorb a paper lunch box, and the push plate is mounted on the side of the support frame away from the flip assembly.

[0014] In one of the embodiments, the push plate includes a fastening sheet and a scraping sheet, the fastening sheet is mounted on the support frame, the scraping sheet is arranged on the fastening sheet, and the scraping sheet is oriented opposite to the adsorption plate.

[0015] In one embodiment, the driving member is a cylinder.

[0016] In one embodiment, a plurality of driving members are provided.

[0017] In one embodiment, the edge material collection box includes a box body, a supporting frame and a plurality of casters, the plurality of casters are installed at the bottom of the supporting frame, the box body is arranged in the supporting frame, and a material inlet is opened at the top of the box body.

[0018] In one of the embodiments, a material guiding bevel is provided at the edge of the feed inlet.

[0019] In one of the embodiments, a movable door is provided on the side of the box.

[0020] In one of the embodiments, a handrail is provided on the supporting frame.

[0021] In one embodiment, the displacement assembly includes a tripod, a transverse translation electric cylinder, and a longitudinal displacement electric cylinder. The tripod is arranged on the conveyor belt, the transverse translation electric cylinder is installed on the tripod, and the longitudinal displacement electric cylinder is arranged on the transverse translation electric cylinder. The transverse translation electric cylinder is used to drive the longitudinal displacement electric cylinder to approach or move away from the machine tool. The flipping assembly is arranged on the longitudinal displacement electric cylinder, and the longitudinal displacement electric cylinder is used to drive the flipping assembly to approach or move away from the conveyor belt.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] 1. The positioning lower mold and the trimming upper mold are both connected to the air pump, so that the positioning lower mold and the trimming upper mold can absorb the lunch box. When trimming, the positioning lower mold will absorb and position the lunch box, and when opening the mold, the trimming upper mold will lift the lunch box away, which saves the robot action steps and can separate the lunch box from the cut edge material;

[0024] 2. A push plate is arranged on the adsorption manipulator. When the adsorption manipulator extends into the machine tool, the push plate sweeps over the positioning lower die and pushes the edge materials into the edge material collection box, thereby integrating the material taking step with the edge material cleaning step.

[0025] 3. The edge materials are removed by pushing the plate, which is convenient for centralized processing, avoiding pollution of the surrounding environment of the equipment, making cleaning easier and reducing the workload of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a structural schematic diagram of an environmentally friendly paper lunch box trimming device in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 The structural schematic diagram of the environmentally friendly paper lunch box trimming device from another perspective;

[0029] Figure 3 It is a structural schematic diagram of the environmentally friendly paper lunch box trimming equipment when the transfer mechanism takes the material;

[0030] Figure 4 It is a structural schematic diagram of a transfer mechanism in one embodiment of the present invention;

[0031] Figure 5 An exploded schematic diagram of a positioning lower die and a trimming upper die in one embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure when the positioning lower mold and the trimming upper mold are in the mold closing state. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] See also Figure 1An environmentally friendly paper lunch box trimming device 10 includes: a punching mechanism 100, a trimming collection box 200 and a transfer mechanism 300. The trimming collection box 200 and the transfer mechanism 300 are respectively arranged on the punching mechanism 100, and a component for removing trimming is arranged on the transfer mechanism 300 to replace the existing air blowing cleaning structure, and after the trimming operation of the lunch box is completed, the punching mechanism 100 lifts the lunch box to keep it away from the trimming, and the transfer mechanism 300 enters the machine tool to take the lunch box and pushes the trimming into the trimming collection box 200 at the same time, combining the trimming removal operation and the material taking operation together, shortening the total time consumption of the trimming process and improving the trimming efficiency.

[0037] See also Figure 1 and Figure 2 The punching mechanism 100 includes a machine tool 110, a punch plate 120, a positioning lower die 130, a trimming upper die 140 and a driving member 150. The machine tool 110 is provided with a workbench 111. The positioning lower die 130 is provided on the workbench 111. The punch plate 120 is slidably provided on the machine tool 110, and the punch plate 120 is located directly above the workbench 111. The trimming upper die 140 is installed on the punch plate 120, and the trimming upper die 140 is provided toward the positioning lower die 130. The positioning lower die 130 and the trimming upper die 140 are both connected to an air pump. The driving member 150 is provided on the machine tool 110 for driving the trimming upper die 140 to reciprocate in a direction close to or away from the positioning lower die 130. Among them, the positioning lower die 130 is used to position the lunch box, and the trimming upper die 140 is used to cut off the edge material of the lunch box.

[0038] The punching mechanism 100 is used to perform edge trimming operation on the lunch box. The specific steps are as follows: In the initial state (such as Figure 1 As shown), the punch plate 120 is away from the workbench 111, and at this time, the trimming upper die 140 is located directly above the positioning lower die 130, and there is a gap between the trimming upper die 140 and the positioning lower die 130, that is, the material taking interval;

[0039] The lunch box conveying mechanism transfers the lunch box to be trimmed to the position of the positioning lower mold 130. At this time, the air pump is started, and negative pressure is generated on the positioning lower mold 130 to absorb the lunch box and fix the lunch box at the positioning lower mold 130. At this time, the lunch box is positioned;

[0040] The driving member 150 is started to push the punch plate 120 downward, so that the trimming upper die 140 and the positioning lower die 130 are attached to each other, and then the edge material on the lunch box is cut off. At this time, the matching state of the trimming upper die 140 and the positioning lower die 130 is as shown in FIG. Figure 6 As shown;

[0041] Next, the positioning lower die 130 stops adsorbing the lunch box, and the trimming upper die 140 generates negative pressure to adsorb the lunch box. The driving member 150 starts again, pulling the punch plate 120 up, and the trimming upper die 140 is driven by the punch plate 120 to move away from the positioning lower die 130. At this time, the lunch box with the trimming material cut off is lifted up by the trimming upper die 140, and the trimming material cut off is retained on the positioning lower die 130, and the trimming material cutting step is completed.

[0042] The scrap collecting box 200 is disposed at one side of the machine tool 110 , and the scrap collecting box 200 is used to store the cut scraps.

[0043] See also Figure 1 and Figure 4 The transfer mechanism 300 includes a conveyor belt 310, a displacement assembly 320, a flip assembly 330, an adsorption manipulator 340 and a push plate 350. The conveyor belt 310 is arranged on a side of the machine tool 110 away from the edge material collection box 200, and a gap is arranged between the conveyor belt 310 and the machine tool 110. The displacement assembly 320 is arranged on the conveyor belt 310, the flip assembly 330 is installed on the displacement assembly 320, the adsorption manipulator 340 is arranged on the flip assembly 330, the flip assembly 330 is used to drive the adsorption manipulator 340 to rotate, the displacement assembly 320 is used to drive the adsorption manipulator 340 to move back and forth between the conveyor belt 310 and the machine tool 110, and the push plate 350 is arranged on the side of the pushing manipulator close to the machine tool 110, and the push plate 350 is used to push the edge material to move toward the edge material collection box 200.

[0044] After the edge material cutting operation of the lunch box is completed at the punching mechanism 100, the lunch box is transferred by the transfer mechanism 300, and the lunch box with the edge material cut off is transferred to the disinfection station for disinfection by the transfer mechanism 300. The specific actions when transferring the lunch box are as follows:

[0045] See also Figure 1 In the initial state, the adsorption robot 340 is located directly above the conveyor belt 310, and the adsorption part of the adsorption robot 340 is set toward the conveyor belt 310, that is, the adsorption part of the adsorption robot 340 is downward at this time;

[0046] When the material taking step is started, the flip assembly 330 drives the adsorption manipulator 340 to flip 180 degrees, so that the adsorption part of the adsorption manipulator 340 is set upward;

[0047] It should be noted that after the trimming step, the lunch box with the trimming material removed is lifted by the trimming upper die 140 and suspended above the positioning lower die 130. At this time, the trimming upper die 140 is separated from the positioning lower die 130 to form a material taking area again.

[0048] The displacement component 320 pushes the adsorption manipulator 340 to extend into the material picking interval. At this time, the adsorption manipulator 340 is located between the positioning lower mold 130 and the positioning lower mold 130, and the adsorption part of the adsorption manipulator 340 is set toward the lunch box on the trimming upper mold 140. After the displacement component 320 moves the adsorption manipulator 340 upward so that the adsorption part is in contact with the outer wall of the lunch box, the adsorption manipulator 340 is started and generates suction to adsorb the lunch box. At this time, the trimming upper mold 140 stops adsorbing the lunch box, and the adsorption manipulator 340 removes the lunch box. At this time, the coordination state of the adsorption manipulator 340 and the stamping mechanism 100 is as shown in FIG. Figure 4 As shown;

[0049] It should be noted that while the displacement assembly 320 pushes the adsorption robot 340 into the material picking interval, the push plate 350 provided on the adsorption robot 340 will also enter the material picking interval, and the push plate 350 will contact the outer wall of the positioning lower mold 130. During the extension process of the robot 340, it will sweep from the side of the positioning lower mold 130 close to the conveyor belt 310 to the side of the positioning lower mold 130 close to the edge material collection box 200, and then sweep the edge material retained on the surface of the positioning lower mold 130 into the edge material collection box 200.

[0050] After the adsorption robot 340 takes down the lunch box, the displacement component 320 starts again and drags the adsorption robot 340 out of the material picking interval. At this time, the adsorption robot 340 is moved to the top of the conveyor belt 310, and the flipping component 330 drives the adsorption robot 340 to rotate 180° again, so that the lunch box on the adsorption robot 340 faces the conveyor belt 310.

[0051] The displacement assembly 320 descends, so that the lunch box on the adsorption robot 340 fits with the conveyor belt 310, and then the lunch box is placed on the surface of the conveyor belt 310. Then the displacement assembly 320 drives the adsorption robot 340 to rise and move to the initial position, and the conveyor belt 310 starts to transfer the lunch box to the next workstation.

[0052] By connecting the positioning lower mold 130 and the trimming upper mold 140 to the air pump, the positioning lower mold 130 and the trimming upper mold 140 are both capable of adsorbing the lunch box, so that the trimming upper mold 140 can take out the lunch box after completing the edge material cutting action on the lunch box, so that the lunch box can be separated from the edge material, so that the subsequent transfer mechanism 300 can simultaneously perform material taking and cleaning operations.

[0053] The edge materials are swept into the edge material collecting box 200 by the push plate 350, so that the edge materials can be centrally processed without the need for subsequent cleaning by operators, which reduces the labor intensity of operators and improves the automation degree of the equipment.

[0054] See also Figure 4In order to improve the adsorption capacity of the adsorption manipulator 340 on the lunch box, reduce the weight of the adsorption manipulator 340 to reduce the burden of the displacement component 320, and thus reduce the occurrence rate of equipment failure, the adsorption manipulator 340 includes a support frame 341 and a plurality of adsorption plates 342. The support frame 341 is installed on the flip component 330, and the plurality of adsorption plates 342 are arranged at intervals on the support frame 341. Each adsorption plate 342 is used to adsorb a paper lunch box, and the push plate 350 is installed on the side of the support frame 341 away from the flip component 330. Among them, the support frame 341 is constructed of a plurality of aluminum profiles, and the overall mass of the adsorption manipulator 340 is reduced by the support frame 341, and the plurality of adsorption plates 342 adsorb the lunch box. In this way, the load acting on the displacement component 320 and the flip component 330 is reduced, and the inertial force generated by the movement of the adsorption manipulator 340 is correspondingly reduced, and the wear amount of the components on the displacement component 320 and the flip component 330 is also reduced, thereby reducing the occurrence rate of equipment failure.

[0055] See also Figure 4 In one embodiment, in order to facilitate the maintenance of the adsorption manipulator 340, the adsorption manipulator 340 also includes a plurality of adjustment plates 343, and the plurality of adjustment plates are arranged on the support frame 341 at intervals, and each adjustment plate is provided with a distance adjustment long hole on the side away from the support frame 341, and a plurality of adsorption plates 342 are respectively provided with a plurality of distance adjustment long holes. In actual use, when replacing the product, since both the positioning lower mold 130 and the trimming upper mold 140 need to be replaced, the position of the part used to position the lunch box therein will change. By changing the installation position of the adsorption plate 342 in the distance adjustment long hole, each adsorption plate 342 can correspond to the position on the trimming upper mold 140 used to position the product, thereby achieving the purpose of meeting the handling needs without replacing the adsorption manipulator 340.

[0056] See also Figure 4 In one embodiment, in order to improve the ability of the push plate 350 to sweep away the edge materials, improve the service life of the push plate 350, and avoid the vibration of the adsorption robot 340 caused by the push plate 350 when sweeping away the edge materials, the push plate 350 includes a fastening sheet 351 and a scraping sheet 352, the fastening sheet 351 is installed on the support frame 341, the scraping sheet 352 is arranged on the fastening sheet 351, and the scraping sheet 352 is in the opposite direction to the adsorption plate 342. The fastening sheet 351 is used to connect the scraper sheet 352 to the adsorption robot 340, and the scraper sheet 352 is used to sweep away the edge material. The push plate 350 is arranged in sections, and the scraper sheet 352 can be replaced individually when it is excessively worn. The fastening sheet 351 and the scraper sheet 352 can be made of different materials to improve the buffering capacity between the fastening sheet 351 and the scraper sheet 352. For example, the scraper sheet 352 can be replaced with soft rubber to increase the elasticity of the scraper sheet 352 to prevent the vibration generated by the scraper sheet 352 when sweeping on the positioning lower mold 130 from being directly transmitted to the adsorption robot 340.

[0057] See also Figure 1 Specifically, in order to increase the trimming pressure, the driving member 150 is a cylinder, and a plurality of driving members 150 are provided.

[0058] See also Figure 2 In order to facilitate the processing of the scraps, the scrap collection box 200 includes a box body 210, a carrier frame 220 and a plurality of casters 230, wherein the plurality of casters 230 are installed at the bottom of the carrier frame 220, the box body 210 is arranged in the carrier frame 220, and a feed inlet 211 is provided at the top of the box body 210, a guide bevel 240 is provided at the edge of the feed inlet 211, a movable door 250 is provided on the side of the box body 210, and a handrail 260 is provided on the carrier frame 220. The guide bevel 240 increases the floor space of the scrap collection box 200, ensures that the scraps swept out by the push plate 350 can smoothly pass through the feed inlet 211 and fall into the box body 210, the handrail 260 can push the carrier frame 220 to move to the unloading position, and the movable door 250 on the box body 210 can be opened to directly sweep out the scraps in the box body 210, and the scraps can be unloaded without turning over the box body 210, thereby reducing the labor intensity of the operator.

[0059] See also Figure 2 In one embodiment, the displacement assembly 320 includes a tripod 321, a transverse translation electric cylinder 322, and a longitudinal displacement electric cylinder 323. The tripod 321 is arranged on the conveyor belt 310, the transverse translation electric cylinder 322 is installed on the tripod 321, and the longitudinal displacement electric cylinder 323 is arranged on the transverse translation electric cylinder 322. The transverse translation electric cylinder 322 is used to drive the longitudinal displacement electric cylinder 323 to approach or move away from the machine tool 110. The flipping assembly 330 is arranged on the longitudinal displacement electric cylinder 323, and the longitudinal displacement electric cylinder 323 is used to drive the flipping assembly 330 to approach or move away from the conveyor belt 310.

[0060] Compared with the prior art, the present invention has at least the following advantages:

[0061] 1. The positioning lower mold 130 and the trimming upper mold 140 are both connected to the air pump, so that the positioning lower mold 130 and the trimming upper mold 140 can absorb the lunch box. When trimming, the positioning lower mold 130 will absorb and position the lunch box, and when opening the mold, the trimming upper mold 140 will lift the lunch box away, which saves the robot action steps and can separate the lunch box from the cut edge material;

[0062] 2. A push plate 350 is provided on the adsorption manipulator 340. When the adsorption manipulator 340 extends into the machine tool 110, the push plate 350 sweeps over the positioning lower die 130 to push the edge materials into the edge material collecting box 200, thereby integrating the material taking step with the edge material cleaning step.

[0063] 3. The edge material is removed by the push plate 350, which is convenient for centralized processing of edge material, avoids pollution of the surrounding environment of the equipment, is easy to clean, and reduces the workload of operators.

[0064] It is understandable that in order to improve the efficiency of trimming, there are generally multiple lunch boxes that are simultaneously trimmed on the trimming equipment. Before trimming the edge material on the lunch box, it is necessary to apply a fixing force to the lunch box placed in the mold to keep it in the mold. In order to avoid damaging the lunch box, the lunch box is generally fixed by adsorbing the lunch box. However, since there are multiple lunch boxes that need to continue to be adsorbed, a negative pressure cavity is opened at the positioning position of each lunch box on the mold, and each negative pressure cavity is connected to an air pump. The air pump is used to evacuate air to form a negative pressure and then adsorb the lunch box. Since each negative pressure cavity needs to be connected to an air pipe, it is difficult to wire the air pipe on the trimming machine, and due to the large number of air pipes, it is difficult to maintain it later. In addition, the size of the lunch box will change according to the needs of different customers, that is, the size of the lunch box to be trimmed and trimmed will be different. At this time, the mold needs to be replaced. Due to the large number of air pipes on the mold, it takes a lot of time to re-erect and connect the air pipes, and it requires experienced maintenance personnel to operate, so it is difficult to replace the mold.

[0065] Therefore, how to optimize the structure of the existing trimming upper mold 140 to reduce the difficulty of operation when replacing the mold is a problem that technical personnel in this field need to solve.

[0066] In order to enable the environmentally friendly paper lunch box trimming device 10 to replace the positioning lower mold 130 and the trimming upper mold 140 to meet the needs of using paper lunch boxes of different sizes,

[0067] See also Figure 5 and Figure 6 , positioning the lower mold 130, the positioning lower mold 130 includes a pad 131, a bottom plate 132 and a positioning seat 133, the bottom plate 132 is installed on the pad 131, and the bottom plate 132 is provided with an air hole 132a, a guide mesh groove 132b and a plurality of negative pressure chambers 132c, the plurality of negative pressure chambers 132c are all located on the side of the bottom plate 132 away from the pad 131, and the plurality of negative pressure chambers 132c are all communicated with the guide mesh groove 132b, the air hole 132a is communicated with one of the negative pressure chambers 132c, the positioning seat 133 is covered on the bottom plate 132, and the positioning seat 133 is provided with a plurality of positioning cavities 133a, each of the positioning cavities 133a is used to accommodate a lunch box, and the plurality of positioning cavities 133a are communicated with the plurality of negative pressure chambers 132c in a one-to-one correspondence, and the air hole 132a is communicated with an air pump;

[0068] See also Figure 5 and Figure 6, the trimming upper die 140, the trimming upper die 140 includes a connecting plate 141, an intermediate pad 142 and a plurality of trimming punches 143, the intermediate pad 142 is installed on the connecting plate 141, a plurality of through holes 142a and negative pressure holes 142b are provided on the intermediate pad 142, and a conducting groove 142c is provided between each two adjacent through holes 142a, the negative pressure hole 142b is communicated with one of the through holes 142a, the conducting groove 142c is located on the side of the intermediate pad 142 close to the connecting plate 141, a plurality of the trimming punches 143 are respectively covered with a plurality of the through holes 142a, a plurality of the trimming punches 143 are respectively arranged toward a plurality of positioning cavities 133a, and the trimming punches 143 are used to cut off the edge material of the lunch box.

[0069] In order to better illustrate the trimming upper mold 140 and the positioning lower mold 130 , the improved concept of the trimming upper mold 140 and the positioning lower mold 130 is better understood.

[0070] See also Figure 5 and Figure 6 The positioning lower mold 130 includes a pad 131, a bottom plate 132 and a positioning seat 133. The bottom plate 132 is installed on the pad 131, and the bottom plate 132 is provided with a vent hole 132a, a guide mesh groove 132b and a plurality of negative pressure chambers 132c. The plurality of negative pressure chambers 132c are all located on the side of the bottom plate 132 away from the pad 131, and the plurality of negative pressure chambers 132c are all connected to the guide mesh groove 132b, and the vent hole 132a is connected to one of the negative pressure chambers 132c. The vent hole 132a is used to It is connected to an external air pump, and each negative pressure chamber is used to form a negative pressure area to adsorb a lunch box. The guide mesh groove 132b connects multiple negative pressure chambers 132c together, so that air can be extracted from the air vent 132a alone to generate negative pressure in all negative pressure chambers 132c, thereby reducing the number of air pipes set up, facilitating equipment wiring, and reducing the number of parts that need to be replaced when switching molds. The switching difficulty is low and can be completed through simple operating instructions without the need for professional assembly knowledge.

[0071] The positioning seat 133 is covered on the bottom plate 132, and a plurality of positioning cavities 133a are opened on the positioning seat 133, each positioning cavity 133a is used to accommodate a lunch box, and the plurality of positioning cavities 133a are connected to the plurality of negative pressure chambers 132c in a one-to-one correspondence, and the air holes 132a are connected to the air pump.

[0072] Among them, the positioning cavity 133a is used to accommodate the lunch box, and the inner wall of the positioning cavity 133a fits with the lunch box to provide positioning for the lunch box. When the device is started, the air pump draws air from the bottom plate 132 through the air hole 132a, so that each negative pressure chamber 132c generates negative pressure and then adsorbs the lunch box in the positioning cavity 133a.

[0073] See also Figure 5 and Figure 6 The trimming upper die 140 includes a connecting plate 141, an intermediate pad 142 and a plurality of trimming convex dies 143. The intermediate pad 142 is installed on the connecting plate 141. A plurality of through holes 142a and negative pressure holes 142b are provided on the intermediate pad 142. A conducting groove 142c is provided between each two adjacent through holes 142a. The negative pressure hole 142b is connected to one of the through holes 142a. The conducting groove 142c is located on the side of the intermediate pad 142 close to the connecting plate 141. A plurality of trimming convex dies 143 are provided one by one to cover the plurality of through holes 142a. The plurality of trimming convex dies 143 are provided one by one to face the plurality of positioning cavities 133a. The trimming convex dies 143 are used to cut off the edge material of the lunch box.

[0074] The multiple through holes 142a are connected through the conducting groove 142c, and the negative pressure hole 142b is connected to the air pump. When the air pump is started, the air in the middle pad 142 is extracted through the negative pressure hole 142b, and negative pressure is generated at each through hole 142a, so that the trimming punch 143 generates suction to adsorb the lunch box. The lunch box is lifted from the positioning mold 100 to facilitate the subsequent material removal operation. In this way, while ensuring the function of the trimming upper mold 140 to lift the lunch box, the purpose of reducing the number of air pipes set on the trimming upper mold 140 is to reduce the difficulty of switching the fixture, and the maintenance difficulty is also reduced accordingly.

[0075] The trimming upper die 140 is arranged directly above the positioning die 100. When the lunch box is placed in the positioning cavity 131, it is located directly below one of the trimming convex dies 143. Driven by the trimming machine, the connecting plate 141 descends, driving the trimming convex 143 to press down. When the trimming convex 143 contacts the edge of the lunch box, the edge material on the lunch box is cut off.

[0076] Furthermore, in order to increase the cutting edge area of ​​the lunch box, the negative pressure chambers 132c are distributed in a rectangular array.

[0077] See also Figure 5 and Figure 6 In one embodiment, the positioning lower mold 130 further includes a gasket 134 , and the gasket 134 is disposed on a side of the positioning seat 133 away from the bottom plate 132 .

[0078] See also Figure 5 In order to facilitate wiring, a quick-change connector 132d is provided on the outer wall of the bottom plate 132, and the quick-change connector 132d is connected to the air vent 132a.

[0079] See also Figure 5In order to reduce the difficulty of mold opening and avoid the inability to separate the trimming upper mold 140 and the positioning lower mold 130 due to negative pressure after trimming, the trimming upper mold 140 also includes a mold opening cylinder 144, which is installed on the middle pad 142, and the output end of the mold opening cylinder 144 is arranged toward the positioning seat 133. A plurality of mold opening cylinders 144 are provided. The mold opening cylinders 144 apply thrust between the trimming upper mold 140 and the positioning lower mold 130 to assist the mold opening action.

[0080] See also Figure 5 and Figure 6 In order to facilitate trimming and to suck up the lunch box after trimming, the trimming punch 143 includes a contour positioning cover 143a and an annular blade 143b. The contour positioning cover 143a is set on the through hole 142a, and the annular blade 143b is set on the outer wall of the contour positioning cover 143a. The trimming punch 143 also includes a hoop 143c, which is placed on the outer wall of the contour positioning cover 143a, and the annular blade 143b is located between the inner wall of the hoop 143c and the outer wall of the contour positioning cover 143a. The contour positioning cover 143a and the annular blade 143b are set separately. The annular blade 143b is a wearing part. When the annular blade 143b is worn, the hoop 143c can be untied to replace the annular blade 143b.

[0081] In order to increase the adsorption force on the lunch box, the contoured positioning cover 143a is provided with a plurality of adsorption holes.

[0082] In order to facilitate the replacement of the mold, an alignment groove is opened on the outer wall of the middle pad 142.

[0083] It can be understood that the above-mentioned positioning lower mold 130 is connected to each negative pressure chamber 132c through the guide mesh groove 132b, and the air in each negative pressure chamber 132c is extracted by the air pump to generate negative pressure and then apply adsorption force to the lunch box. As the number of negative pressure chambers 132c increases, the output power of the air pump also increases. In this way, the requirements for the air pump are relatively high, and the service life of the air pump will be greatly reduced if it is in a high-load operation state for a long time. In order to reduce the load of the air pump, the guide mesh groove 132b is composed of a plurality of monomer channels, which include a transverse channel and a longitudinal channel. The transverse channel and the longitudinal channel intersect to form an "X"-shaped structure. The center positions of the transverse channel and the longitudinal channel coincide and are connected to form an intersection node, and both ends of the transverse channel and the longitudinal channel are connected to a negative pressure chamber 132c, that is, each monomer channel is connected to four negative pressure chambers 132c, and a guide plate is provided at the intersection node.

[0084] The negative pressure chambers 132c are connected by intersecting transverse channels and longitudinal channels, further reducing the distance between each negative pressure chamber 132c and the air vent 132a, reducing the hollow space inside the bottom plate 132, and further reducing the amount of air that the air pump needs to draw when negative pressure is formed in each negative pressure chamber 132c, thereby reducing the output power of the air pump.

[0085] Furthermore, during the gas extraction process, the flow directions of air in the transverse channel and the longitudinal channel are different. Therefore, when they meet at the intersection node, convection will be formed, resulting in mixed flow at the intersection node, which increases the difficulty of gas extraction. The more negative pressure chambers 132c are set, the greater the impact. By setting a guide plate at the intersection node, the air flowing into the transverse channel and the longitudinal channel can be prevented from directly converging to form convection. After the air enters the intersection node, it contacts the guide plate and slightly turns under the action of the guide plate, thereby avoiding the phenomenon of direct collision between the transverse channel and the longitudinal channel to cause mixed flow. The air flow direction is guided at the intersection node to reduce the air pump extraction load.

[0086] Compared with the prior art, the present invention has at least the following advantages:

[0087] 1. When replacing the mold, only the bottom plate 132 and the positioning seat 133 of the positioning lower mold 130, the middle pad 142 and multiple trimming convex molds 143 on the trimming upper mold 140 need to be replaced, that is, the connecting plate 141 and the pad 131 are common parts, which reduces the replacement of parts and reduces the labor intensity of the operator;

[0088] 2. Multiple negative pressure chambers 132c are interconnected through the guide mesh groove 132b, and the air pump and multiple negative pressure chambers 132c are connected through the air holes 132a. It is only necessary to connect the air holes 132a to form a negative pressure adsorption lunch box in each negative pressure chamber 132c. When replacing the mold, it is only necessary to reconnect the air pipe at the position of the air holes 132a, which reduces the difficulty of replacing the mold;

[0089] 3. By reducing the number of air pipes used, the number of easily worn parts on the mold is reduced, thereby reducing the failure rate of the mold and reducing the difficulty of mold maintenance.

[0090] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An environmentally friendly paper lunch box trimming device, characterized in that: include: A stamping mechanism, the stamping mechanism comprising a machine tool, a punching plate, a positioning lower die, a trimming upper die and a driving member, the machine tool being provided with a workbench, the positioning lower die being provided on the workbench, the punching plate being slidably provided on the machine tool, and the punching plate being located directly above the workbench, the trimming upper die being mounted on the punching plate, and the trimming upper die being arranged toward the positioning lower die, the positioning lower die and the trimming upper die being both connected to an air pump, and the driving member being provided on the machine tool for driving the trimming upper die to reciprocate in a direction close to or away from the positioning lower die; A scrap collecting box, the scrap collecting box being arranged on one side of the machine tool; A transfer mechanism, the transfer mechanism includes a conveyor belt, a displacement component, a flip component, an adsorption manipulator and a push plate, the conveyor belt is arranged on a side of the machine tool away from the edge material collection box, and a gap is arranged between the conveyor belt and the machine tool, the displacement component is arranged on the conveyor belt, the flip component is installed on the displacement component, the adsorption manipulator is arranged on the flip component, the flip component is used to drive the adsorption manipulator to rotate, the displacement component is used to drive the adsorption manipulator to move back and forth between the conveyor belt and the machine tool, the push plate is arranged on a side of the adsorption manipulator close to the machine tool, and the push plate is used to push the edge material to move in a direction close to the edge material collection box; In the initial state, the adsorption manipulator is located directly above the conveyor belt, and the adsorption part of the adsorption manipulator is arranged toward the conveyor belt; when the material picking step is started, the flip assembly is used to drive the adsorption manipulator to flip 180 degrees, so that the adsorption part of the adsorption manipulator is arranged upward; The adsorption manipulator comprises a support frame and a plurality of adsorption plates, wherein the support frame is mounted on the flip assembly, the plurality of adsorption plates are arranged at intervals on the support frame, each of the adsorption plates is used to adsorb a paper lunch box, and the push plate is mounted on the side of the support frame away from the flip assembly; The edge material collection box comprises a box body, a supporting frame and a plurality of casters, wherein the plurality of casters are mounted on the bottom of the supporting frame, the box body is arranged in the supporting frame, and a material inlet is opened on the top of the box body.

2. The environmentally friendly paper lunch box trimming device according to claim 1 is characterized in that: The push plate includes a fastening sheet and a scraping sheet, wherein the fastening sheet is mounted on the support frame, and the scraping sheet is arranged on the fastening sheet, and the scraping sheet is in the opposite direction to the adsorption disk.

3. The environmentally friendly paper lunch box trimming device according to claim 2, characterized in that: The driving member is an oil cylinder.

4. The environmentally friendly paper lunch box trimming device according to claim 3, characterized in that: The driving member is provided in plurality.

5. The environmentally friendly paper lunch box trimming device according to claim 1, characterized in that: A material guiding bevel is arranged at the edge of the material inlet.

6. The environmentally friendly paper lunch box trimming device according to claim 5, characterized in that: A movable door is arranged on the side of the box body.

7. The environmentally friendly paper lunch box trimming device according to claim 5, characterized in that: The bearing frame is provided with an armrest.

8. The environmentally friendly paper lunch box trimming device according to claim 1, characterized in that: The displacement assembly includes a tripod, a transverse translation electric cylinder, and a longitudinal displacement electric cylinder. The tripod is arranged on the conveyor belt, the transverse translation electric cylinder is installed on the tripod, and the longitudinal displacement electric cylinder is arranged on the transverse translation electric cylinder. The transverse translation electric cylinder is used to drive the longitudinal displacement electric cylinder to approach or move away from the machine tool. The flipping assembly is arranged on the longitudinal displacement electric cylinder, and the longitudinal displacement electric cylinder is used to drive the flipping assembly to approach or move away from the conveyor belt.

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