A coating device for a fresh-keeping coated corrugated cardboard box and the cardboard box

Abstract

The present invention relates to the technical field of corrugated cardboard box production, and in particular to a coating device for a coated corrugated cardboard box for freshness preservation and the cardboard box, including a base, a material cylinder and a conveying frame. A screw rod is fixed to the upper end of the base, a supporting screw sleeve is threadedly connected to the side wall of the screw rod, a support plate is fixed to the upper end of the supporting screw sleeve, and a push plate is fixed to the side wall of the supporting screw sleeve. A freshness preservation layer and an ethylene absorption layer covering the outside of the freshness preservation layer are coated on the surface of the liner paper of the cardboard box. The freshness preservation layer is mainly formed by coating 0.5 to 1.5 parts by weight of konjac glucomannan and 100 parts by weight of deionized water on the surface of the liner paper of the cardboard box and drying. The ethylene absorption layer is formed by coating potassium permanganate added with deionized water on the surface of the freshness preservation layer and drying. The advantages are as follows: The cardboard box rotates and moves upward, the nozzles are evenly distributed and spray the coating evenly, so that the inner wall of the cardboard box is subjected to rotary and uniform spraying treatment from top to bottom, the treatment efficiency is very high, and the equipment runs stably.

Description

Technical Field

[0001] The present invention relates to the technical field of corrugated carton production, and particularly relates to a coating device for a fresh-keeping coated corrugated carton and the carton thereof. Background Art

[0002] According to statistics, more than 8 million tons of fruits and vegetables rot in China every year, causing high economic losses. Therefore, researching fresh-keeping technologies is of great significance for reducing the losses of fruits and vegetables caused by rot. Especially in the links of storage, transportation, and sales after the fruits and vegetables are picked;

[0003] In the aspect of fresh-keeping of fruits and vegetables in the prior art, commonly used technologies include modified atmosphere packaging, low-temperature refrigeration, etc. These require a large number of equipment and high costs, and the fresh-keeping effect is not good. In recent years, the film coating fresh-keeping technology has been used, that is, a layer of edible film with fresh-keeping effect is coated on the surface of fruits and vegetables, but there are also many problems, such as too long drying time and easy to breed microorganisms; after film coating, packaging containers are still needed, etc. Existing cartons generally lack direct fresh-keeping ability, and the efficiency of coating the fresh-keeping layer on the surface of some cartons is very low. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of low coating efficiency and poor effect in the prior art, and to propose a coating device for a fresh-keeping coated corrugated carton and the carton thereof.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: A coating device for a fresh-keeping coated corrugated carton, including a base, a material cylinder, and a conveying frame. A screw rod is fixed at the upper end of the base. A support screw sleeve is threadedly connected to the side wall of the screw rod. A support plate is fixed at the upper end of the support screw sleeve. A push plate is fixed to the side wall of the support screw sleeve. A lifting rod is fixed to the bottom of the push plate. The lifting rod is fixed to the base. A pair of transfer frames are fixed to the side wall of the support plate. A pair of side wheels are rotatably connected to the inner wall of the transfer frame. A side belt is sleeved on the two side wheels. A motor is fixed to the side wall of the transfer frame. The output shaft of the motor is fixed to one of the side wheels;

[0006] An oil pump is fixed at the upper end of the material cylinder. A hole for adding materials is provided on the side wall of the material cylinder and a valve is provided inside. A pressing plate is hermetically and slidably connected to the inner wall of the material cylinder. A spray box is fixed at the bottom of the material cylinder. A falling hole communicating with the inside of the spray box is provided at the bottom of the material cylinder. A plurality of nozzles are installed on the side wall of the spray box.

[0007] In the above coating device for a fresh-keeping coated corrugated carton, a guide plate is fixed to the inner bottom of the spray box. The middle of the guide plate is low and the periphery is high. A rotating rod is hermetically and rotatably connected to the bottom of the spray box. A brush block is fixed to the lower end of the rotating rod. A brush hair is fixed to the bottom of the brush block.

[0008] In the above-mentioned coating device for fresh-keeping corrugated cartons, the upper end of the rotating rod is hermetically and rotatably penetrated through the bottom of the material cylinder. A carrying plate is fixed to the inner wall of the material cylinder. The rotating rod penetrates through the carrying plate. The upper section of the rotating rod is provided with threads and is threadedly connected with a slider. The upper end of the slider is fixed with a pressing rod.

[0009] In the above-mentioned coating device for fresh-keeping corrugated cartons, a plurality of release holes are respectively formed through the bottoms of the guide plate and the spray box. A plurality of baffles are fixed to the side wall of the brush block, and the baffles close the release holes.

[0010] In the above-mentioned coating device for fresh-keeping corrugated cartons, a drying sleeve is fixed to the upper end of the conveying frame. A high-temperature wheel and a low-temperature wheel are rotatably connected to the side wall of the conveying frame. The high-temperature wheel and the low-temperature wheel are jointly sleeved with a conveyor belt. A plurality of heat-conducting strips are embedded in the side wall of the conveyor belt. A heating rod is installed on the side wall of the conveying frame, and the heating rod is located inside the conveyor belt.

[0011] In the above-mentioned coating device for fresh-keeping corrugated cartons, an inflation hole is formed in the side wall of the conveying frame. A distribution sleeve is fixed to the top of the drying sleeve. A lead-out pipe communicated with the inside of the distribution sleeve is fixed to the side wall of the conveying frame. A plurality of internal heat pipes communicated with the inside of the distribution sleeve are fixed to the top of the drying sleeve.

[0012] In the above-mentioned coating device for fresh-keeping corrugated cartons, a high-temperature sleeve and a low-temperature sleeve are fixed to the outer wall of the conveying frame. An eddy current tube is fixed to the bottom of the conveying frame. The hot end of the eddy current tube is communicated with the high-temperature sleeve through a heat flow pipe. The cold end of the eddy current tube is communicated with the low-temperature sleeve through a cold flow pipe. A high-temperature shaft is fixed to the end of the high-temperature wheel. A low-temperature shaft is fixed to the end of the low-temperature wheel. High-temperature blades and low-temperature blades are respectively fixed to the side walls of the high-temperature shaft and the low-temperature shaft. The high-temperature shaft and the low-temperature shaft are respectively located inside the high-temperature sleeve and the low-temperature sleeve. The inflation hole is communicated with the high-temperature sleeve. A transfer pipe is fixed to the side wall of the low-temperature sleeve, and a plurality of spray pipes are fixed to the side wall of the transfer pipe.

[0013] A carton applied to the above-mentioned coating device for fresh-keeping corrugated cartons. A fresh-keeping layer and an ethylene absorption layer covering the outside of the fresh-keeping layer are coated on the surface of the liner paper of the carton. The fresh-keeping layer is mainly formed by coating 0.5-1.5 parts by weight of konjac glucomannan and 100 parts by weight of deionized water on the surface of the liner paper of the carton and drying. The ethylene absorption layer is formed by coating potassium permanganate added with deionized water on the surface of the fresh-keeping layer and drying.

[0014] Compared with the existing technology, the advantages of the present invention are as follows:

[0015] 1. The carton rotates and moves upward, the nozzles are evenly distributed and spray the coating evenly, so that the inner wall of the carton is subjected to a rotary and uniform spraying treatment from top to bottom, the treatment efficiency is very high, and the equipment runs stably;

[0016] 2. The airflow takes away and transfers the heat generated by the heating rod, thus transferring it to the distribution sleeve through the outlet pipe and finally spraying it out through each internal heat pipe to achieve the drying treatment of the inside of the cardboard box. At the same time, the heat will also be conducted through the heat conduction strip, so that the fabric at the bottom of the cardboard box can also be fully heat-dried;

[0017] 3. It can use low-temperature airflow to cool the processed cardboard box, enabling it to be collected faster. Moreover, the flow of the airflow will also impact the low-temperature leaves and high-temperature leaves, thereby causing the high-temperature shaft and the low-temperature shaft to rotate. Thus, without the need for external driving components, the kinetic energy of the airflow can be utilized to convey the cardboard box;

[0018] 4. The surface of the liner paper of the cardboard box is coated with a fresh-keeping layer and an ethylene absorption layer covering the fresh-keeping layer. It is green, environmentally friendly, non-toxic and harmless, recyclable, and can achieve the fresh-keeping effect throughout the transportation and sales processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic structural diagram of a coating device for a fresh-keeping coated corrugated cardboard box and the cardboard box proposed by the present invention;

[0020] Figure 2 FIG. is a side cross-sectional view of the support plate part of a coating device for a fresh-keeping coated corrugated cardboard box and the cardboard box proposed by the present invention;

[0021] Figure 3 FIG. is a half cross-sectional view of the conveying frame part of a coating device for a fresh-keeping coated corrugated cardboard box and the cardboard box proposed by the present invention;

[0022] Figure 4 FIG. is a partial cross-sectional view of the high-temperature sleeve and the low-temperature sleeve of a coating device for a fresh-keeping coated corrugated cardboard box and the cardboard box proposed by the present invention;

[0023] Figure 5 FIG. is a schematic internal structure diagram of the spray box of a coating device for a fresh-keeping coated corrugated cardboard box and the cardboard box proposed by the present invention.

[0024] In the figure: 1 base, 2 barrel, 3 conveying rack, 4 screw, 5 support sleeve, 6 support plate, 7 push plate, 8 lifting rod, 9 transfer rack, 10 side wheel, 11 motor, 12 side belt, 13 oil pump, 14 pressing plate, 15 spraying box, 16 nozzle, 17 guiding plate, 18 falling hole, 19 rotating rod, 20 carrying plate, 21 slider, 22 pressing rod, 23 brush block, 24 brush hair, 25 baffle plate, 26 release hole, 27 drying sleeve, 28 high-temperature wheel, 29 low-temperature wheel, 30 conveyor belt, 31 heating rod, 32 heat-conducting strip, 33 eddy current tube, 34 heat flow tube, 35 cold flow tube, 36 high-temperature sleeve, 37 high-temperature shaft, 38 high-temperature blade, 39 inflation hole, 40 low-temperature sleeve, 41 low-temperature shaft, 42 low-temperature blade, 43 transfer tube, 44 spraying tube, 45 outlet tube, 46 distribution sleeve, 47 internal heat tube. Detailed implementation mode

[0025] The following embodiments are only for illustrative purposes and are not intended to limit the scope of the present invention. Embodiment

[0026] Refer to Figures 1-5 , a coating device for a fresh-keeping coated corrugated cardboard box, including a base 1, a barrel 2 and a conveying rack 3. A screw 4 is fixed to the upper end of the base 1. A support sleeve 5 is threadedly connected to the side wall of the screw 4. A support plate 6 is fixed to the upper end of the support sleeve 5. A push plate 7 is fixed to the side wall of the support sleeve 5. A lifting rod 8 is fixed to the bottom of the push plate 7. The lifting rod 8 is fixed to the base 1. A pair of transfer racks 9 are fixed to the side wall of the support plate 6. A pair of side wheels 10 are rotatably connected to the inner wall of the transfer rack 9. A side belt 12 is sleeved on the two side wheels 10 together. A motor 11 is fixed to the side wall of the transfer rack 9. The output shaft of the motor 11 is fixed to one of the side wheels 10;

[0027] An oil pump 13 is fixed to the upper end of the barrel 2. A hole for feeding is provided on the side wall of the barrel 2 and a valve is provided inside. A pressing plate 14 is hermetically slidably connected to the inner wall of the barrel 2. A spraying box 15 is fixed to the bottom of the barrel 2. A falling hole 18 communicating with the inside of the spraying box 15 is provided at the bottom of the barrel 2. A plurality of nozzles 16 are installed on the side wall of the spraying box 15. The inside of the cardboard box is comprehensively and evenly coated by the rotation and lifting of the cardboard box.

[0028] A guiding plate 17 is fixed to the inner bottom of the spraying box 15. The middle of the guiding plate 17 is low and the periphery is high. A rotating rod 19 is hermetically and rotatably connected through the bottom of the spraying box 15. A brush block 23 is fixed to the lower end of the rotating rod 19. Brush hair 24 is fixed to the bottom of the brush block 23. The bottom of the cardboard box is evenly coated by the relative rotation of the brush hair 24 and the cardboard box.

[0029] The upper end of the rotating rod 19 is hermetically and rotatably penetrated through the bottom of the material cylinder 2. A carrying plate 20 is fixed to the inner wall of the material cylinder 2. The rotating rod 19 penetrates through the carrying plate 20. The upper section of the rotating rod 19 is provided with threads and is threadedly connected with a slider 21. A pressing rod 22 is fixed to the upper end of the slider 21. Multiple release holes 26 are respectively formed through the bottom of the guide plate 17 and the spraying box 15. A plurality of baffles 25 are fixed to the side wall of the brush block 23. The baffles 25 block the release holes 26. By the offset and yielding of the baffles 25, the release holes 26 are opened, and then the bottom of the carton is coated.

[0030] A drying sleeve 27 is fixed to the upper end of the conveying rack 3. A high-temperature wheel 28 and a low-temperature wheel 29 are rotatably connected to the side wall of the conveying rack 3. The high-temperature wheel 28 and the low-temperature wheel 29 are jointly sleeved with a conveyor belt 30. A plurality of heat-conducting strips 32 are embedded in the side wall of the conveyor belt 30. A heating rod 31 is installed on the side wall of the conveying rack 3. The heating rod 31 is located inside the conveyor belt 30. The high-temperature wheel 28 and the low-temperature wheel 29 can be driven by an external driving component to operate, realizing the transportation of the carton.

[0031] An inflation hole 39 is formed in the side wall of the conveying rack 3. A distribution sleeve 46 is fixed to the top of the drying sleeve 27. A lead-out pipe 45 communicated with the inside of the distribution sleeve 46 is fixed to the side wall of the conveying rack 3. A plurality of internal heat pipes 47 communicated with the inside of the distribution sleeve 46 are fixed to the top of the drying sleeve 27. The heating rod 31 can be electrified to generate heat, thus realizing high-temperature drying. And after air flow is introduced, heat air flow transfer can be realized, and then heat can be rapidly diffused, realizing efficient drying treatment.

[0032] A high-temperature sleeve 36 and a low-temperature sleeve 40 are fixed to the outer wall of the conveying rack 3. An eddy current tube 33 is fixed to the bottom of the conveying rack 3. The hot end of the eddy current tube 33 is communicated with the high-temperature sleeve 36 through a heat flow tube 34. The cold end of the eddy current tube 33 is communicated with the low-temperature sleeve 40 through a cold flow tube 35. A high-temperature shaft 37 is fixed to the end of the high-temperature wheel 28. A low-temperature shaft 41 is fixed to the end of the low-temperature wheel 29. High-temperature blades 38 and low-temperature blades 42 are respectively fixed to the side walls of the high-temperature shaft 37 and the low-temperature shaft 41. The high-temperature shaft 37 and the low-temperature shaft 41 are respectively located inside the high-temperature sleeve 36 and the low-temperature sleeve 40. The inflation hole 39 is communicated with the high-temperature sleeve 36. A transfer pipe 43 is fixed to the side wall of the low-temperature sleeve 40. A plurality of spray pipes 44 are fixed to the side wall of the transfer pipe 43. The eddy current tube 33 is connected with an external air compressor. Therefore, high-temperature air flow and low-temperature air flow can be provided simultaneously, thus completing the drying and cooling treatment, improving the overall efficiency, and driving the transportation of the carton by using the high fluidity of the air flow, reducing the number of external devices.

[0033] A carton applied to the carton coating device for fresh-keeping, with a fresh-keeping layer coated on the surface of the inner paper of the carton and an ethylene absorption layer covering the outside of the fresh-keeping layer. The fresh-keeping layer is mainly formed by coating 0.5 - 1.5 parts by weight of konjac glucomannan and 100 parts by weight of deionized water on the surface of the inner paper of the carton and drying. The ethylene absorption layer is formed by adding deionized water to potassium permanganate, coating it on the surface of the fresh-keeping layer and drying. It is green and environmentally friendly, non-toxic and harmless, recyclable, and can play a fresh-keeping effect throughout the transportation and sales process.

[0034] In the present invention, during actual processing, the carton is placed on the upper end of the support plate 6, a certain amount of coating is injected into the barrel 2, and then the lifting rod 8 and the oil pump 13 are started. The push plate 7 is pushed upward by the lifting rod 8, and then the support sleeve 5 is driven to move upward. At the same time, due to the effect of the thread, the support sleeve 5 rotates while moving upward during the upward movement, so that the carton placed on the support plate 6 rotates and moves upward;

[0035] After the oil pump 13 is started, oil is injected into the upper part of the barrel 2, so as to push the pressing plate 14 downward. The coating inside the barrel 2 is extruded through the pressing plate 14, so that it is manually pressurized and passes through the falling hole 18, and finally evenly sprayed by each nozzle 16. The carton rotates and moves upward, and the nozzles 16 are evenly distributed and spray the coating evenly, so that the inner wall of the carton is evenly sprayed in a rotary manner from top to bottom. The processing efficiency is very high, and the equipment runs stably;

[0036] When the pressing plate 14 moves down to the bottom area of the barrel 2, it will push the pressure rod 22 downward, so that the slider 21 moves downward, and then the rotating rod 19 rotates under the action of the thread, driving the brush block 23 to rotate, and finally making the baffle 25 rotate, so that the baffle 25 is displaced and no longer closes the release hole 26, so that the remaining coating can be released through the release hole 26 to the inner bottom of the carton, and finally the bristles 24 will contact the bottom of the carton, and then rotate and smear the coating on the inner bottom of the carton, so that the inside of the carton is effectively and comprehensively coated;

[0037] Subsequently, the carton is moved downward to reset, and then the motor 11 is started, and then the side belt 12 is driven to operate, and the upper carton is transferred into the drying sleeve 27, thus completing the spraying step, and the subsequent processing of the carton can be carried out;

[0038] After entering the drying sleeve 27, the heating rod 31 can be started, and the external air pump is connected to the inflation hole 39. Then, the high-temperature wheel 28 and the low-temperature wheel 29 are rotated by the external driving component, so that the conveyor belt 30 can operate to convey the carton, and the airflow takes away the heat generated by the heating rod 31 and transfers it, and then transfers it to the distribution sleeve 46 through the outlet pipe 45, and finally sprays out from each internal heat pipe 47 to realize the drying treatment of the inside of the carton. At the same time, the heat will also be conducted through the heat conduction strip 32, so that the fabric at the bottom of the carton can also be fully heat-dried.

[0039] Similarly, the vortex tube 33 can be activated to output hot and cold airflows simultaneously through the vortex tube 33. The hot airflow is introduced into the high-temperature sleeve 36 through the hot flow tube 34, and then injected into the conveying rack 3 through the inflation hole 39, thereby completing the drying process with the hot airflow. The cold airflow is injected into the low-temperature sleeve 40 through the cold flow tube 35, and then distributed to each ejection tube 44 by the transfer tube 43, and finally ejected comprehensively. Thus, the processed cardboard boxes can be cooled with the low-temperature airflow, enabling them to be collected more quickly. Moreover, the flowing airflow will also impact the low-temperature blades 42 and the high-temperature blades 38, causing the high-temperature shaft 37 and the low-temperature shaft 41 to rotate. Therefore, no external driving components are required, and the kinetic energy of the airflow can be utilized to achieve the conveyance of the cardboard boxes.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A coating device for a fresh-keeping coated corrugated cardboard box, comprising a base (1), a material cylinder (2) and a conveying rack (3), characterized in that, A screw rod (4) is fixed to the upper end of the base (1). A support screw sleeve (5) is threadedly connected to the side wall of the screw rod (4). A support plate (6) is fixed to the upper end of the support screw sleeve (5). A push plate (7) is fixed to the side wall of the support screw sleeve (5). A lifting rod (8) is fixed to the bottom of the push plate (7). The lifting rod (8) is fixed to the base (1). A pair of transfer frames (9) are fixed to the side wall of the support plate (6). A pair of side wheels (10) are rotatably connected to the inner wall of the transfer frame (9). A side belt (12) is sleeved on the two side wheels (10) together. A motor (11) is fixed to the side wall of the transfer frame (9). The output shaft of the motor (11) is fixed to one of the side wheels (10); An oil pump (13) is fixed to the upper end of the material cylinder (2). A hole for feeding material is provided in the side wall of the material cylinder (2) and a valve is provided inside. A pressing plate (14) is hermetically and slidably connected to the inner wall of the material cylinder (2). A spraying box (15) is fixed to the bottom of the material cylinder (2). A falling hole (18) communicating with the inside of the spraying box (15) is provided in the bottom of the material cylinder (2). A plurality of spray nozzles (16) are installed on the side wall of the spraying box (15). A guiding plate (17) is fixed to the inner bottom of the spraying box (15). The guiding plate (17) is low in the middle and high around. A rotating rod (19) is hermetically and rotatably connected through the bottom of the spraying box (15). A brush block (23) is fixed to the lower end of the rotating rod (19). A brush hair (24) is fixed to the bottom of the brush block (23). The upper end of the rotating rod (19) is hermetically and rotatably connected through the bottom of the material cylinder (2). A carrying plate (20) is fixed to the inner wall of the material cylinder (2). The rotating rod (19) penetrates through the carrying plate (20). A thread is provided on the upper section of the rotating rod (19) and a slider (21) is threadedly connected thereto. A pressing rod (22) is fixed to the upper end of the slider (21). A plurality of groups of release holes (26) are provided through the guiding plate (17) and the bottom of the spraying box (15). A plurality of baffle plates (25) are fixed to the side wall of the brush block (23). The baffle plates (25) close the release holes (26).

2. The coating device for a fresh-keeping coated corrugated cardboard box according to claim 1, wherein A drying sleeve (27) is fixed to the upper end of the conveying frame (3). A high-temperature wheel (28) and a low-temperature wheel (29) are rotatably connected to the side wall of the conveying frame (3). A conveyor belt (30) is sleeved on the high-temperature wheel (28) and the low-temperature wheel (29) together. A plurality of heat-conducting strips (32) are embedded in the side wall of the conveyor belt (30). A heating rod (31) is installed on the side wall of the conveying frame (3). The heating rod (31) is located inside the conveyor belt (30).

3. A coating device for a fresh-keeping coated corrugated cardboard box according to claim 2, characterized in that, An inflation hole (39) is provided in the side wall of the conveying frame (3). A distribution sleeve (46) is fixed to the top of the drying sleeve (27). A lead-out pipe (45) communicating with the inside of the distribution sleeve (46) is fixed to the side wall of the conveying frame (3). A plurality of internal heat pipes (47) communicating with the inside of the distribution sleeve (46) are fixed to the top of the drying sleeve (27).

4. A coating device for a fresh-keeping coated corrugated cardboard box according to claim 3, characterized in that, The outer wall of the conveying frame (3) is fixed with a high-temperature sleeve (36) and a low-temperature sleeve (40). The bottom of the conveying frame (3) is fixed with a vortex tube (33). The hot end of the vortex tube (33) is connected to the high-temperature sleeve (36) through a heat flow tube (34). The cold end of the vortex tube (33) is connected to the low-temperature sleeve (40) through a cold flow tube (35). The end of the high-temperature wheel (28) is fixed with a high-temperature shaft (37). The end of the low-temperature wheel (29) is fixed with a low-temperature shaft (41). The side walls of the high-temperature shaft (37) and the low-temperature shaft (41) are respectively fixed with high-temperature blades (38) and low-temperature blades (42). The high-temperature shaft (37) and the low-temperature shaft (41) are respectively located in the high-temperature sleeve (36) and the low-temperature sleeve (40). The inflation hole (39) is connected to the high-temperature sleeve (36). The side wall of the low-temperature sleeve (40) is fixed with a transfer pipe (43). The side wall of the transfer pipe (43) is fixed with a plurality of ejection pipes (44).

5. A carton applied to the carton coating device for freshness preservation described in any one of claims 1-4, characterized in that, The inner paper surface of the carton is coated with a fresh-keeping layer and an ethylene absorption layer covering the fresh-keeping layer. The fresh-keeping layer is mainly formed by coating 0.5 - 1.5 parts by weight of konjac glucomannan and 100 parts by weight of deionized water on the inner paper surface of the carton and drying. The ethylene absorption layer is formed by adding potassium permanganate to deionized water, coating it on the surface of the fresh-keeping layer and drying.

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