A chocolate paper box and its production process

Abstract

The present invention relates to a chocolate paper box, which comprises a paper box body. The paper box body includes, from outside to inside in sequence: a first film layer; a cardboard layer; a second film layer; an isolation layer; a third film layer. Among them, the first film layer and the second film layer are respectively laminated on both sides of the cardboard layer, and the third film layer is laminated on the inner side of the isolation layer. The beneficial effects of the present invention are as follows: The first film layer and the second film layer can effectively protect the cardboard layer and improve the waterproof effect of the cardboard layer. The isolation layer can effectively isolate light, oxygen and odor, preventing light, oxygen and odor from passing through the cardboard layer and contacting the internal food, thus prolonging the shelf life of the internal food.

Description

Technical Field

[0001] The present invention relates to the technical field of paper boxes, and particularly relates to a chocolate paper box and its production process. Background Art

[0002] Paper product packaging is the type with the largest consumption in industrial packaging. Paper boxes are widely used as sales packaging for various products such as food, medicine, and electronics. With the changes in transportation methods and sales methods, the styles of cardboard boxes and paper boxes are becoming increasingly diverse.

[0003] Some existing chocolate gift box packages generally directly place chocolates in the paper box. However, the existing paper boxes easily allow external oxygen, light, and odors to pass through the paper box body and enter the paper box, thereby affecting the quality of the food stored in the paper box. Especially for foods like chocolates that are sensitive to temperature and humidity, the impact is greater. Summary of the Invention

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide a chocolate paper box and its production process to solve the above problems.

[0005] The technical solution of the present invention is realized as follows: A chocolate paper box includes a paper box body, and the paper box body includes, from outside to inside in sequence:

[0006] A first film layer;

[0007] A cardboard layer;

[0008] A second film layer;

[0009] An isolation layer;

[0010] A third film layer;

[0011] Among them, the first film layer and the second film layer are respectively laminated on both sides of the cardboard layer, and the third film layer is laminated on the inner side of the isolation layer.

[0012] By adopting the above technical solution, the first film layer and the second film layer can effectively protect the cardboard layer and improve the waterproof effect of the cardboard layer. The isolation layer can effectively isolate light, oxygen, and odors, preventing light, oxygen, and odors from passing through the cardboard layer and contacting the internal food, and prolonging the storage period of the internal food.

[0013] The present invention is further configured as: It further includes:

[0014] A reinforcement layer, which is provided on the peripheral side walls and the bottom of the paper box body and has a shape corresponding to them;

[0015] Among them, the reinforcement layer is provided between the second film layer and the isolation layer.

[0016] By adopting the above technical solution, the reinforcement layer can effectively improve the strength of the four sides and the bottom of the paper box body, making it more resistant to pressure and better protecting the food inside.

[0017] The present invention is further configured such that: the reinforcement layer is a plastic sheet.

[0018] By adopting the above technical solution, the plastic sheet is light in weight and has good compression resistance and certain elasticity, thereby effectively improving the strength of the paper box body.

[0019] The present invention is further configured as follows: the isolation layer is configured as aluminum foil.

[0020] By adopting the above technical solution, the aluminum foil can effectively isolate light, oxygen and odor, so that the paper box has a better packaging and protection effect on food. In addition, the aluminum foil is very light, which avoids the paper box from being too heavy.

[0021] The present invention is further configured to include:

[0022] A hot-adhesive layer is provided at each bonding edge of the paper box body, and the hot-adhesive layer is provided on a side of the third film layer away from the isolation layer.

[0023] By adopting the above technical solution, the paper box can be folded and formed from paperboard more quickly and conveniently, thereby improving the production efficiency.

[0024] A production process for a chocolate paper box comprises the following steps:

[0025] S1: laminating the first film layer and the second film layer onto both sides of the pretreated paperboard layer respectively by a pre-coating laminating machine;

[0026] S2: Applying adhesive on the inner side of the second film layer by a gluing machine;

[0027] S3: bonding a reinforcement layer of a corresponding shape to the inner side of the second film layer;

[0028] S4: Apply glue on the inner side of the reinforcement layer through a glue coating machine;

[0029] S5: Lay the isolation layer on the inner side of the reinforcement layer and press it with a flattening machine;

[0030] S6: laminating the third film layer onto the inner side of the isolation layer by a pre-coating laminating machine to obtain a finished paperboard;

[0031] S7: Put the finished cardboard into the cutting machine and press and cut it into a specified shape to obtain a paper box body;

[0032] S8: Put the paper box body into the creasing machine to make indentations at the folding corners;

[0033] S9: Apply a hot-adhesive layer on each bonding edge of the paper box body, and then fold and bond the paper box body;

[0034] S10: Put a partition into the paper box body to obtain a finished chocolate paper box.

[0035] By adopting the above technical solution, the layers can be effectively fixed together to make the connection more stable. Mechanical automation operation is adopted to make the production and processing faster and improve the production efficiency.

[0036] The present invention is further configured as follows: the first film layer, the second film layer and the third film layer in the step S1, the step S2 and the step S6 are all subjected to corona discharge treatment before hot pressing.

[0037] By adopting the above technical solution, the connection between the first film layer, the second film layer and the third film layer and other layers can be made more stable and firm.

[0038] The present invention is further configured as follows: in the step S5, the pressure of the flattening machine is set to 30-50 MPa, and the holding time is 15S-30S.

[0039] By adopting the above technical solution, the bonding between the aluminum foil and the plastic sheet can be made tighter and more stable.

[0040] The present invention is further configured as follows: the gluing machine comprises:

[0041] A plastic box, wherein an opening is provided on the upper side of the plastic box, and a scraper is provided at the edge of the opening;

[0042] A glue attachment roller, the side wall of which extends into the glue box and contacts and seals with the scraper;

[0043] A glue storage box, wherein glue is stored in the glue storage box;

[0044] The filter box is used to filter the glue in the glue storage box and send it into the glue box.

[0045] By adopting the above technical scheme, the glue in the glue storage box is continuously filtered through the filter box and then enters the glue box, the surface of the glue adhesion roller extends into the glue box and contacts the glue, the scraper at the opening of the glue box has a sealing function, and can effectively remove the excess glue on the surface of the glue adhesion roller, and the glue application roller is dipped in glue through the glue adhesion roller to glue the conveyed cardboard, and the glue in the glue box also continuously flows back to the glue storage box for circulation.

[0046] The present invention is further configured as follows: a first cavity, a second cavity, and a third cavity are formed in the filter box. An annular receiving groove is formed on the side wall of the first cavity. The receiving groove is isolated from the first cavity by an annular retaining net. A number of through holes are formed in the retaining net. The filter box is provided with a first channel connecting the outside and the receiving groove, a second channel connecting the first cavity and the second cavity, a third channel connecting the first cavity and the third cavity, a fourth channel connecting the outside and the third cavity, and a fifth channel connecting the outside and the second cavity. The first channel is connected to the glue storage box through a first conduit and extends below the liquid level. The second cavity and the third cavity are communicated. A flow regulating device is provided in the first cavity. A second sealing block is provided in the second cavity. A telescopic rod is provided on one side of the second sealing block. The telescopic rod is connected to a driving mechanism. A third sealing block for isolating the second cavity and the third cavity is provided in the third cavity. A spring is provided on the side of the third sealing block away from the second cavity. The second sealing block can extend into the third cavity to drive the third sealing block to slide. Check valves are provided in the second channel, the third channel, the fourth channel, and the fifth channel. The second cavity sends the glue into the glue box through the fifth channel. The check valve in the second channel is set to flow towards the second cavity. The check valve in the third channel is set to flow towards the third cavity. The check valves in the fourth channel and the fifth channel are both set to flow towards the outside.

[0047] By adopting the above technical solution, the second sealing block can have two working modes. The first working mode is that when the telescopic rod is in a contracted state, the initial position of the second sealing block is inside the right end of the second cavity. At this time, the driving mechanism drives the telescopic rod to make the second sealing block slide reciprocally in the second cavity. When the second sealing block slides inward, the glue in the second cavity is extruded through the fifth channel and sent into the glue box, and at the same time, the glue in the glue box is sent out to the glue storage box. When the second sealing block slides outward, the glue passing through the retaining net in the first cavity is sucked into the second cavity through the second channel, and the glue in the glue storage box is sucked into the first cavity through the retaining net, completing one cycle. Thus, the filtered glue is effectively continuously sent into the glue storage box. At the same time, the retaining net can effectively filter the impurities in the glue and the flocs and lumps generated after the glue is used for a long time, avoiding clogging the glue box and effectively improving the quality of glue application.

[0048] The second working mode is that when the telescopic rod is in the extended state, the initial position of the second sealing block is in contact with the third sealing block. When the second sealing block slides through the driving mechanism, it always maintains the sealing of the second channel and the fifth channel. The driving mechanism is activated to drive the second sealing block and push the third sealing block into the third cavity, while compressing the spring. When the third sealing block moves into the third cavity, the impurities blocked by the blocking net in the third cavity will be discharged through the fourth channel. When the second sealing block retracts, the third sealing block moves to the right under the action of the spring. At this time, under the action of negative pressure, the impurities blocked by the blocking net in the receiving groove will be pumped into the third cavity through the third channel, thereby effectively cleaning the accumulated impurities in the receiving groove, ensuring the use effect of the blocking net, making the flow of glue smoother and the cleaning more convenient; by adjusting the length of the telescopic rod, the effect of conveying and cleaning through one driving component is achieved, and the structure is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0050] Figure 1 Structural schematic diagram of the paper box body in the specific embodiment of the present invention;

[0051] Figure 2 Structural schematic diagram of the fitting edge of the paper box body in the specific embodiment of the present invention;

[0052] Figure 3 Structural schematic diagram of the glue applicator in the specific embodiment of the present invention;

[0053] Figure 4 Structural schematic diagram of the filter box in the specific embodiment of the present invention;

[0054] Figure 5 Structural schematic diagram of A in the specific embodiment of the present invention;

[0055] Figure 6 Structural schematic diagram of the filter box in the first working mode in the specific embodiment of the present invention;

[0056] Figure 7 Structural schematic diagram of the filter box in the second working mode in the specific embodiment of the present invention Figure 1 ;

[0057] Figure 8 Structural schematic diagram of the filter box in the second working mode in the specific embodiment of the present inventionFigure 2 ;

[0058] Figure 9 This is the structural schematic diagram of B in the specific embodiment of the present invention;

[0059] Figure 10 This is the cross-sectional view of the glue box and the cleaning rod in the specific embodiment of the present invention;

[0060] Figure 11 This is the structural schematic diagram of C in the specific embodiment of the present invention;

[0061] Figure 12 This is the structural schematic diagram of the temporary storage mechanism in the specific embodiment of the present invention;

[0062] Figure 13 This is the top view cross-section of the humidifying and heating mechanism in the specific embodiment of the present invention Figure 1 ;

[0063] Figure 14 This is the front view cross-section of the humidifying and heating mechanism in the specific embodiment of the present invention Figure 2 ;

[0064] Figure 15 This is the structural schematic diagram of the heating tube in the specific embodiment of the present invention; Specific Embodiment

[0065] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0066] As Figures 1 - 15 shown, the present invention discloses a chocolate paper box, which includes a paper box body, and the paper box body includes, from outside to inside in sequence:

[0067] The first film layer 1;

[0068] The cardboard layer 2;

[0069] The second film layer 3;

[0070] The isolation layer 5;

[0071] The third film layer 6;

[0072] Among them, the first film layer 1 and the second film layer 3 are respectively laminated on both sides of the cardboard layer 2, and the third film layer 6 is laminated on the inner side of the isolation layer 5.

[0073] By adopting the above technical solution, the first thin film layer 1 and the second thin film layer 3 can effectively protect the cardboard layer 2, preventing it from improving the waterproof effect of the cardboard layer 2. The isolation layer 5 can effectively isolate light, oxygen and odor, preventing light, oxygen and odor from passing through the cardboard layer 2 and contacting the internal food, thus extending the shelf life of the internal food.

[0074] In an embodiment of the present invention, it further includes:

[0075] A reinforcing layer 4, which is provided on the four side walls and the bottom of the carton body and has a shape corresponding thereto;

[0076] Wherein, the reinforcing layer 4 is provided between the second thin film layer 3 and the isolation layer 5.

[0077] By adopting the above technical solution, the reinforcing layer 4 can effectively improve the strength of the four sides and the bottom of the carton body, making it more compression-resistant and providing better protection for the internal food.

[0078] In an embodiment of the present invention, the reinforcing layer 4 is a plastic sheet.

[0079] By adopting the above technical solution, the plastic sheet is light in weight and has good compression resistance and certain elasticity, thus effectively improving the strength of the carton body.

[0080] In an embodiment of the present invention, the isolation layer 5 is an aluminum foil.

[0081] By adopting the above technical solution, the aluminum foil can effectively isolate light, oxygen and odor, making the packaging protection effect of the carton on the food better, and the quality of the aluminum foil is very light, avoiding the carton from being too heavy.

[0082] In an embodiment of the present invention, it further includes:

[0083] A hot melt adhesive layer 7, which is provided at each bonding edge of the carton body, and the hot melt adhesive layer 7 is provided on the side of the third thin film layer 6 away from the isolation layer 5.

[0084] By adopting the above technical solution, the carton can be folded and formed from the cardboard more quickly and conveniently, improving the production efficiency.

[0085] A production process of a chocolate carton includes the following steps:

[0086] S1: Laminate the first thin film layer 1 and the second thin film layer 3 onto both sides of the pretreated cardboard layer 2 through a pre-coated laminating machine respectively; the pretreatment includes the following steps:

[0087] a: Dry the cardboard layer 2 to reach the required dryness;

[0088] b: Dust the two sides of the cardboard layer 2 with a dust collector;

[0089] S2: Coat the inner side of the second film layer 3 with adhesive using a gluing machine;

[0090] S3: Adhere the corresponding-shaped reinforcement layer 4 to the inner side of the second film layer 3;

[0091] S4: Coat the inner side of the reinforcement layer 4 with adhesive again using a gluing machine;

[0092] S5: Bond the isolation layer 5 to the inner side of the reinforcement layer 4 and press it using a flattening machine;

[0093] S6: Laminate the third film layer 6 onto the inner side of the isolation layer 5 using a pre-coated laminating machine to obtain the finished cardboard;

[0094] S7: Place the finished cardboard into a cutting machine and press-cut it into a specified shape to obtain the carton body;

[0095] S8: Place the carton body into a scoring machine and score the corners;

[0096] S9: Apply a hot adhesive layer 7 to the bonding edges of the carton body, and then fold and bond the carton body;

[0097] S10: Place a partition inside the carton body to obtain the finished chocolate carton.

[0098] By adopting the above technical solution, drying the cardboard layer 2 first can effectively prevent separation between the first film layer 1 and the second film layer 3 after laminating, improve the stability of the lamination connection and the strength of the cardboard layer 2, effectively fix and connect each layer together, make the connection more stable, and all adopt mechanical automation operation to make the production and processing faster and improve production efficiency.

[0099] In the embodiment of the present invention, the first film layer 1, the second film layer 3, and the third film layer 6 in steps S1, S2, and S6 are all subjected to corona discharge treatment before hot pressing.

[0100] By adopting the above technical solution, the connection between the first film layer 1, the second film layer 3, and the third film layer 6 and other layers can be made more stable and firm.

[0101] In the embodiment of the present invention, the pressure of the flattening machine in step S5 is set to 30 - 50 MPa, and the pressure holding time is 15S - 30S.

[0102] By adopting the above technical solution, the bonding between the aluminum foil and the plastic sheet can be made closer and more stable.

[0103] In the embodiment of the present invention, the gluing machine includes:

[0104] A plastic box 8, wherein an opening is provided on the upper side of the plastic box 8, and a scraper 80 is provided at the edge of the opening;

[0105] A glue attachment roller 9, the side wall of which extends into the glue box 8 and contacts and seals with the scraper 80;

[0106] A glue roller 10, the outer wall of which contacts the outer wall of the glue attachment roller 9;

[0107] A pressing roller 11, which is arranged above the gluing roller 10 and is used to press the paperboard;

[0108] A glue storage box 12, wherein glue is stored in the glue storage box 12;

[0109] The filter box 13 is used to filter the glue in the glue storage box 12 and send it into the glue box 8.

[0110] By adopting the above technical scheme, the glue in the glue storage box 12 is continuously filtered through the filter box 13 and then enters the glue box 8. The surface of the glue adhesion roller 9 extends into the glue box 8 and contacts the glue. The scraper 80 at the opening of the glue box 8 has a sealing function, which can effectively remove the excess glue on the surface of the glue adhesion roller 9. The glue roller 10 is coated with glue through the glue adhesion roller 9 to glue the conveyed cardboard, and the glue in the glue box 8 also continuously flows back to the glue storage box 12 for circulation.

[0111] In an embodiment of the present invention, a first cavity 15, a second cavity 16, and a third cavity 17 are formed in the filter box 13. An annular accommodation groove 150 is formed on the side wall of the first cavity 15. The accommodation groove 150 is isolated from the first cavity 15 by an annular retaining net 151. A plurality of through holes are formed in the retaining net 151. The filter box 13 is provided with a first channel 130 communicating the outside with the accommodation groove 150, a second channel 131 communicating the first cavity 15 and the second cavity 16, a third channel 132 communicating the first cavity 15 and the third cavity 17, a fourth channel 133 communicating the outside with the third cavity 17, and a fifth channel 134 communicating the outside with the second cavity 16. The first channel 130 is connected to the glue storage box 12 through a first conduit 18 and extends below the liquid level. The second cavity 16 and the third cavity 17 communicate with each other. A flow regulating device is provided in the first cavity 15. A second sealing block 160 is provided in the second cavity 16. A telescopic rod 161 is provided on one side of the second sealing block 160. The telescopic rod 161 is connected to a driving mechanism 19. A third sealing block 170 for isolating the second cavity 16 and the third cavity 17 is provided in the third cavity 17. A spring 171 is provided on the side of the third sealing block 170 away from the second cavity 16. The second sealing block 160 can extend into the third cavity 17 to drive the third sealing block 170 to slide. Check valves 135 are provided in the second channel 131, the third channel 132, the fourth channel 133, and the fifth channel 134. The second cavity 16 feeds glue into the glue box 8 through the fifth channel 134. The check valve 135 in the second channel 131 is set to flow towards the second cavity 16. The check valve 135 in the third channel 132 is set to flow towards the third cavity 17. The check valves 135 in the fourth channel 133 and the fifth channel 134 are both set to flow towards the outside.

[0112] By adopting the above technical solution, the second sealing block 160 can have two working modes. In the first working mode, when the telescopic rod 161 is in the contracted state, the initial position of the second sealing block 160 is inside the right end of the second cavity 16. At this time, the driving mechanism 19 drives the telescopic rod 161 to make the second sealing block 160 slide back and forth in the second cavity 16. When the second sealing block 160 slides inward, the glue in the second cavity 16 is extruded from the fifth channel 134 and sent into the glue box 8, and at the same time, the glue in the glue box 8 is sent out into the glue storage tank 12. When the second sealing block 160 slides outward, the glue passing through the mesh 151 in the first cavity 15 is drawn into the second cavity 16 through the second channel 131, and the glue in the glue storage tank 12 is drawn into the first cavity 15 through the mesh 151, completing a cycle, so as to effectively send the filtered glue into the glue storage tank 12 continuously. At the same time, the mesh 151 can effectively filter the impurities in the glue and the flocs and lumps generated after the glue is used for a long time, avoiding blocking the glue box 8 and effectively improving the gluing quality;

[0113] In the second working mode, when the telescopic rod 161 is in the extended state, the initial position of the second sealing block 160 is in contact with the third sealing block 170. When the second sealing block 160 slides through the driving mechanism 19, it always keeps the second channel 131 and the fifth channel 134 sealed. The driving mechanism 19 is started to drive the second sealing block 160 and push the third sealing block 170 into the third cavity 17, while compressing the spring 171. When the third sealing block 170 moves into the third cavity 17, the impurities blocked by the mesh 151 in the third cavity 17 are discharged through the fourth channel 133. When the second sealing block 160 retracts, the third sealing block 170 moves to the right under the action of the spring 171. At this time, under the action of negative pressure, the impurities blocked by the mesh 151 in the receiving groove 150 are drawn into the third cavity 17 through the third channel 132, so as to effectively clean the accumulated impurities in the receiving groove 150, ensure the use effect of the mesh 151, make the flow of the glue smoother and the cleaning more convenient; By adjusting the length of the telescopic rod 161, the effect of conveying and cleaning through one driving component is realized, and the structure is simple and efficient.

[0114] In the embodiment of the present invention, the adjusting device includes:

[0115] A sealing block 152, the sealing block 152 corresponds to the inner wall of the mesh 151, and an operating rod 153 is provided at one end of the sealing block 152, and the operating rod 153 penetrates through the filter box 13 and extends out for sliding.

[0116] By adopting the above technical solution, the flow rate of the retaining net 151 can be adjusted by adjusting the position of the sealing block 152, so as to adjust the flow rate of the glue in the first cavity 15, and the operation is very simple and convenient.

[0117] In the embodiment of the present invention, the shape of the second sealing block 160 corresponds to the inner wall of the second cavity 16, the shape of the third sealing block 170 corresponds to the third cavity 17. When the second sealing block 160 is in the initial position, there is a spacing between it and the third sealing block 170. The third sealing block 170 is pressed against the connection of the second cavity 16 and the third cavity 17 by a spring 171. When the telescopic rod 161 is in the contracted state, the second sealing block 160 slides in the second cavity 16 under the action of the driving mechanism 19. When the telescopic rod 161 is in the extended state, the second sealing block 160 slides in the second cavity 16 and the third cavity 17 under the action of the driving mechanism 19. When the second sealing block 160 pushes the third sealing block 170, the second channel 131 and the fifth channel 134 are always kept sealed.

[0118] By adopting the above technical solution, the second sealing block 160 can not only effectively send the glue in the glue storage tank 12 into the glue box 8, but also effectively discharge the impurities in the receiving groove 150, and the use is simpler and more efficient.

[0119] In the embodiment of the present invention, a first diversion channel 1700 is provided at one end of the third sealing block 170 close to the second cavity 16. One end of the first diversion channel 1700 is provided at the center of the third sealing block 170, and the other end of the first diversion channel 1700 is arranged close to the fifth channel 134. A second diversion channel 136 communicating the fifth channel 134 and the third cavity 17 is opened on the filter box 13, and the other end of the first diversion channel 1700 corresponds to and conducts with the second diversion channel 136.

[0120] By adopting the above technical solution, when in the first working mode, the second sealing block 160 slides in the second cavity 16. When the second cavity 16 moves towards the third sealing block 170, the squeezed glue will also move towards the third sealing block 170. At this time, the pressure will act on the third sealing block 170. Part of the glue will directly flow out through the fifth channel 134, and the other part will effectively introduce the glue squeezing the third sealing block 170 into the fifth channel 134 through the first diversion channel 1700 and the second diversion channel 136, thereby effectively reducing the pressure on the side of the third sealing block 170 facing the second sealing block 160, and effectively avoiding the movement of the third sealing block 170 due to excessive pressure.

[0121] In the embodiment of the present invention, it further includes:

[0122] A pressure relief valve 137, the pressure relief valve 137 is arranged in the third channel 132 and in front of a check valve 135 in the third channel 132.

[0123] By adopting the above technical solution, when in the first working mode, the pressure relief valve 137 is in a normally closed state, which can effectively prevent the glue in the first cavity 15 from automatically flowing into the third cavity 17. Only when in the second working mode, when the spring 171 resets to push the third sealing block 170, the negative pressure generated in the third cavity 17 can open the pressure relief valve 137, sucking the glue and impurities in the first cavity 15 into the third cavity 17, effectively avoiding the waste of glue.

[0124] In the embodiment of the present invention, the telescopic rod 161 includes:

[0125] A fixed tube 1610, one end of the fixed tube 1610 is fixed on the second sealing block 160;

[0126] A sliding tube 1611, the sliding tube 1611 is slidably connected in the fixed tube 1610, the inside of the sliding tube 1611 is hollow, one end of the sliding tube 1611 is provided with a support sleeve 1612 that can be expanded under the action of an external force, and the inner wall of the end of the sliding tube 1611 away from the support sleeve 1612 is provided with internal threads;

[0127] A pull rod 1613, one end of the pull rod 1613 is provided with a tapered block 1614, the other end of the pull rod 1613 is provided with a threaded rod 1615, and the outer wall of the threaded rod 1615 is provided with external threads corresponding to the internal threads;

[0128] Wherein, the pull rod 1613 is arranged in the sliding tube 1611, and the maximum outer diameter of the tapered block 1614 is greater than the inner diameter of the sliding tube 1611.

[0129] By adopting the above technical solution, the sliding tube 1611 can freely expand and contract in the fixed tube 1610. After adjusting to the required length, by rotating the threaded rod 1615, the threaded rod 1615 is screwed into the sliding tube 1611, driving the tapered block 1614 to move into the sliding tube 1611, and the tapered block 1614 expands the support sleeve 1612, so that the outer surface of the support sleeve 1612 abuts against and locks with the inner wall of the fixed tube 1610, realizing the fixation of the sliding tube 1611 in the fixed tube 1610, and the operation is very convenient.

[0130] In the embodiment of the present invention, it further includes:

[0131] A limiting hole 1616, the limiting hole 1616 is strip-shaped and opened on the side wall of the fixed tube 1610;

[0132] The guide pin 1617 is provided on the outer wall of the sliding tube 1611 and extends into the limit hole 1616.

[0133] The friction layer 1618 is provided on the outer wall of the support sleeve 1612 to increase the frictional force between the support sleeve 1612 and the inner wall of the fixed tube 1610.

[0134] Wherein, the guide pin 1617 is slidably connected to the limit hole 1616.

[0135] By adopting the above technical solution, the cooperation between the guide pin 1617 and the limit hole 1616 can effectively prevent the threaded rod 1615 from driving the sliding tube 1611 to rotate when rotating, making the operation more convenient; the friction layer 1618 can effectively increase the frictional force between the support sleeve 1612 and the inner wall of the fixed tube 1610, making the locking more firm and stable.

[0136] In the embodiment of the present invention, the driving mechanism 19 includes:

[0137] The housing 190;

[0138] The first gear 191, two sets of circumferentially symmetrically arranged first tooth patterns 1910 are provided on the circumferential side wall of the first gear 191. The area of each first tooth pattern 1910 on the first gear 191 is set as the first transmission angle. The first movement angle accounts for no more than 7% of the circumference of the first gear 191. The first gear 191 is driven to rotate by a motor.

[0139] The second gear 192, a second tooth pattern 1920 is provided on the circumferential side wall of the second gear 192. The area of the second tooth pattern 1920 on the second gear 192 is set as the second transmission angle. The second transmission angle accounts for no more than 18% of the circumference of the second gear 192.

[0140] The rack 193 is slidably connected in the housing 190, and a third tooth pattern 1930 is provided on the rack 193.

[0141] Wherein, the first gear 191 and the second gear 192 are both rotatably connected in the housing 190. The second tooth pattern 1920 is always meshed with the third tooth pattern 1930. The first tooth pattern 1910 is intermittently meshed with the second tooth pattern 1920 and the third tooth pattern 1930. The diameters of the first gear 191 and the second gear 192 are the same. The rack 193 is fixedly connected to the sliding tube 1611.

[0142] By adopting the above technical solution, when the first gear 191 rotates counterclockwise, one of the first tooth patterns 1910 will first engage with the second tooth pattern 1920 on the second gear 192, thereby driving the second gear 192 to rotate clockwise. The rotation of the second gear 192 can drive the rack 193 to move to the right. When the first tooth pattern 1910 is separated from the second tooth pattern 1920, the rack 193 stops moving. Then, the first tooth pattern 1910 will engage with the third tooth pattern 1930 on the rack 193, driving the rack 193 to move to the left and driving the second gear 192 to rotate counterclockwise, so that the second gear 192 rotates to a preset position where it engages with another first tooth pattern 1910, realizing the reciprocating movement of the rack 193. The reciprocating movement speed and stroke can be adjusted by designing different tooth numbers, effectively improving the overall efficiency.

[0143] In an embodiment of the present invention, the gluing machine further includes:

[0144] A cleaning rod 20, which is arranged in the glue box 8 and contacts the outer wall of the glue adhering roller 9;

[0145] An outer cover 21, on which an inlet and an outlet for the cardboard to enter and exit are provided;

[0146] A heating cover 22, which is used to blow hot air on one side of the outer wall of the glue adhering roller 9;

[0147] A hot air circulation mechanism;

[0148] Among them, the glue adhering roller 9 is hollow inside, and the outer cover 21 wraps the glue adhering roller 9, the gluing roller 10, the pressing roller 11, and the heating cover 22. The hot air circulation mechanism is used to heat, filter, and transport the air in the outer cover 21 to the heating cover 22.

[0149] By adopting the above technical solution, the cleaning rod 20 rotates in the glue box 8 and contacts the outer wall of the glue adhering roller 9, effectively cleaning the impurities adhering to the outer wall of the glue adhering roller 9. The hot air blown by the heating cover 22 heats the side of the glue adhering roller 9 that is about to enter the glue box 8, preventing the glue on the glue adhering roller 9 from solidifying and causing the impurities to solidify in the glue, making the cleaning rod 20 cleaner in cleaning the impurities adhering to the glue adhering roller 9. The hot air circulation mechanism can effectively improve the utilization rate of heat and save energy.

[0150] In an embodiment of the present invention, the hot air circulation mechanism includes:

[0151] An air pump 27, which is used to extract the air in the outer cover 21;

[0152] A temporary storage mechanism 23, which can store gas inside;

[0153] A filter 24 for filtering the air sent out by an air pump 27;

[0154] A humidifying and heating mechanism 25 for heating the incoming air and increasing its humidity;

[0155] Wherein, the intake end of the air pump 27 is connected to the inside of the outer cover 21, the outlet end of the air pump 27 is connected to the filter 24 through a temporary storage mechanism 23, the outlet end of the filter 24 is connected to the inlet end inside the glue application roller 9, and the outlet end inside the glue application roller 9 is connected to the heating cover 22 through the humidifying and heating mechanism 25.

[0156] By adopting the above technical solution, the hot air blown out by the heating cover 22 still has residual heat after passing through the surface of the glue application roller 9. The air pump 27 extracts the air inside the outer cover 21, passes it through the temporary storage mechanism 23 and then enters the filter 24 to filter impurities in the air, and then sends it into the inside of the glue application roller 9 to heat the glue application roller 9. The air coming out of the inside of the glue application roller 9 passes through the humidifying and heating mechanism 25 to increase the temperature and increase a certain humidity according to the actual situation, adjust it to the required humidity, and then send it into the heating cover 22 to blow on the glue application roller 9, effectively utilizing the residual heat of the hot air blown out by the heating cover 22, and circulating, making its energy utilization rate higher, more energy-saving, and also effectively improving the heating effect on the glue application roller 9.

[0157] In the embodiment of the present invention, the cleaning rod 20 includes:

[0158] An inner tube 200 which is hollow inside, and a plurality of first guide holes 2000 are formed on the side wall of the inner tube 200 around the axis;

[0159] A diversion tube 201, on the inner wall of which diversion grooves 2010 are formed corresponding to the first guide holes 2000, and second guide holes 2011 are formed on the bottom of the diversion grooves 2010;

[0160] A conical plate 202, the cross-section of which is conical, the conical plate includes a left side plate 2020 and a right side plate 2021, the upper sides of the left side plate 2020 and the right side plate 2021 are connected, the lower sides of the left side plate 2020 and the right side plate 2021 are arranged on the outer wall of the diversion tube 201 and are separated, and a plurality of third guide holes 2022 are formed on the side walls of the left side plate 2020 and the right side plate 2021 along their lengths;

[0161] A cover plate strip 203 which is arc-shaped, and both ends of the cover plate strip 203 are fixedly connected to both ends of the diversion tube 201 through mounting plates 204, and a plurality of fourth guide holes 2030 are formed on the cover plate strip 203;

[0162] A brush sleeve 205, the brush sleeve 205 includes a mesh sleeve 2050 and a brush 2051, the brush 2051 is evenly distributed on the outer wall of the mesh sleeve 2050, and the mesh sleeve 2050 is provided with a hollow structure;

[0163] Wherein, a plurality of conical plates 202 are arranged annularly around the axis line of the diversion tube 201. A diversion space 206 is formed by the left side plate 2020, the right side plate 2021 and the diversion tube 201. The second guide hole 2011 is communicated with the diversion space 206. The cover plate strip 203 is arranged between the tops of two adjacent conical plates 202. The sleeve 2050 is sleeved on the outer side of the cover plate strip 203. The glue flowing out from the fourth guide hole 2030 can pass through the mesh sleeve 2050 and flow towards the brush 2051. The filter box 13 simultaneously sends the filtered glue into the inner tube 200.

[0164] By adopting the above technical solution, the glue enters the interior from one end of the inner tube 200, and successively flows out through the first guide hole 2000, the diversion groove 2010, the second guide hole 2011, the diversion space 206, the third guide hole 2022, and the fourth guide hole 2030, and then passes through the mesh sleeve 2050 and enters between the brushes 2051. Thus, when the brush 2051 contacts the glue application roller 9, the glue is applied on the surface of the glue application roller 9, so that the cleaning rod 20 can not only effectively clean the impurities on the glue application roller 9, but also effectively apply the glue evenly on the surface of the glue application roller 9, making the glue more evenly distributed on the surface of the glue application roller 9.

[0165] In the embodiment of the present invention, connection pipes 2001 and a rotating shaft 2002 are respectively arranged at both ends of the inner tube 200. The connection pipe 2001 is communicated with the interior of the inner tube 200. The connection pipe 2001 penetrates through the glue box 8 and extends out and is connected to the outlet end of the filter box 13 through a rotary joint 207. The rotating shaft 2002 penetrates through the glue box 8 and extends out to be connected with a driving motor 208. The driving motor 208 is used to drive the cleaning rod 20 to rotate in the glue box 8.

[0166] By adopting the above technical solution, the cleaning rod 20 is rotationally connected in the glue box 8 through the driving motor 208, so that the brush 2051 rotates and contacts the surface of the glue application roller 9, improving the cleaning effect.

[0167] In the embodiment of the present invention, the cleaning rod 20 further includes:

[0168] A plug 2003, the plug 2003 is arranged on the outer wall of the inner tube 200 along the length direction of the inner tube 200;

[0169] Slot 2012, the shape of the slot 2012 corresponding to the insertion block 2003, the slot 2012 being provided on the inner wall of the diversion pipe 201, one end of the slot 2012 extending to one end of the diversion pipe 201;

[0170] Wherein, the insertion block 2003 is inserted into the slot 2012.

[0171] By adopting the above technical solution, the inner pipe 200 can be effectively connected to the diversion pipe 201 through the insertion block 2003 and the slot 2012, thereby driving its rotation, making the connection between the inner pipe 200 and the diversion pipe 201 more convenient and easy.

[0172] In the embodiment of the present invention, it further includes:

[0173] A second pressure relief valve 29, the inlet end of the second pressure relief valve 29 being connected to the inlet end of the filter 24, and the outlet end of the second pressure relief valve 29 being connected to the temporary storage mechanism 23 through a second pipeline 236.

[0174] By adopting the above technical solution, the second pressure relief valve 29 is in a normally closed state. When the filter 24 is blocked by impurities, the air pressure at its inlet end will be higher than that at the outlet end. When the air pressure at the inlet end of the filter 24 exceeds the opening pressure of the second pressure relief valve 29, the second pressure relief valve 29 will automatically open, introducing air into the temporary storage mechanism 23 for storage, effectively preventing the high pressure at the inlet end of the filter 24 from pressing unfiltered air into the filter 24, ensuring that the air at the outlet end of the filter 24 is all filtered.

[0175] In the embodiment of the present invention, the temporary storage mechanism 23 includes:

[0176] A box body 230;

[0177] A first pipeline 231, both ends of the first pipeline 231 being connected to the outlet end of the air pump 27 and the inlet end of the filter 24, the first pipeline 231 passing through the box body 230;

[0178] An air storage bag 232, the air storage bag 232 being connected to the inlet end of the filter 24 through a second pipeline 236, the upper side of the air storage bag 232 being communicated with the first pipeline 231 through an electromagnetic valve 233, the air storage bag 232 being elastic;

[0179] An elastic member 234;

[0180] A support plate 235, the support plate 235 being provided on the lower side of the air storage bag 232;

[0181] Wherein, the elastic member 234 is provided between the lower side of the support plate 235 and the bottom of the box body 230.

[0182] By adopting the above technical solution, under normal conditions, the air sent out by the air pump 27 enters the filter 24 through the first pipeline 231. When the filter 24 is blocked, the second pressure relief valve 29 opens and guides the air into the air storage bag 232 through the second pipeline 236. The air storage bag 232 gradually expands and compresses the elastic member 234. When the air stored in the air storage bag 232 reaches a certain amount, an alarm will be issued to remind the worker that the filter 24 is blocked. After the filter 24 is cleaned, by opening the solenoid valve 233, the air in the air storage bag 232 is squeezed into the first pipeline 231 under the action of the elastic member 234 and is transported to the filter 24 for filtration. Thus, the air guided by the second pressure relief valve 29 can be effectively stored temporarily. After the filter 24 is cleaned, this part of the air is filtered again to ensure that the air at the outlet end of the filter 24 is all filtered.

[0183] In the embodiment of the present invention, the humidifying and heating mechanism 25 includes:

[0184] A bottom plate 250, a water collecting tank 2500 is arranged inside the bottom plate 250, a plurality of water collecting holes 2501 communicating with the water collecting tank 2500 are opened on the upper side of the bottom plate 250, and a water outlet 2502 communicating with the water collecting tank 2500 is opened on one side of the bottom plate 250;

[0185] A top plate 251, a water guiding groove 2510 is opened on the top plate 251, a plurality of downward water holes 2511 communicating with the water guiding groove 2510 are opened on the lower side of the top plate 251, and a water inlet 2512 communicating with the water guiding groove 2510 is opened on the upper side of the top plate 251;

[0186] A heating tube group 252, the heating tube group 252 includes two mounting plates 2521 and a plurality of heating tubes 2520 fixedly connected between the two mounting plates 2521. A heating hole 2522 for gas to flow through and be heated is arranged in the middle of the heating tube 252. A gas guiding hole 2523 corresponding to the heating hole 2522 is opened on the mounting plate 2521. Two groups of the heating tube group 252 are arranged in parallel between the bottom plate 250 and the top plate 251. The two sides of the heating tube group 252 where the gas guiding holes 2523 are located are respectively set as the first side C1 and the second side C2, and the other two opposite sides are respectively set as the third side C3 and the fourth side C4;

[0187] A first fan 253, the first fan 253 is arranged at one end of one of the heating tube groups 252 on the first side;

[0188] A dry air outlet 254, the dry air outlet 254 is arranged at one end of the other heating tube group 252 on the first side;

[0189] A second fan 255, the second fan 255 is arranged on the third side;

[0190] A deflector plate 256 is provided on the second side surface, and the side of the deflector plate 256 facing the second side surface is arcuately arranged. The deflector plate 256 is used to direct the air sent from the heating holes 2522 of one heating tube group 252 into the heating holes 2522 of the other heating tube group 252;

[0191] A wet air outlet 257 is provided on the fourth side surface;

[0192] An air volume mixing and adjusting device 258, which includes two inlet ends and two outlet ends;

[0193] A branch pipe 259;

[0194] Wherein, the dry air outlet 254 and the wet air outlet 257 are respectively connected to the two inlet ends of the air volume mixing and adjusting device 258. One outlet end of the air volume mixing and adjusting device 258 is connected to the heating hood 22, and the other outlet end of the air volume mixing and adjusting device 258 is connected to the outside. The outlet ends inside the glue adhering roller 9 are respectively connected to the first fan 253 and the second fan 255 through the branch pipe 259.

[0195] By adopting the above technical solution, the water outlet holes 2511 on the top plate 251 continuously spray water onto the heating tube group 252. The air coming out of the inside of the glue adhering roller 9 enters the first fan 253 and the second fan 255 respectively. The first fan 253 drives the air into the heating holes 2522 of one group of heating tube groups 252 for primary heating, and then is directed by the deflector plate 256 into the heating holes 2522 of the other group of heating tube groups 252 for secondary heating. Since there is no contact with water throughout the process, the air coming out of the dry air outlet 254 is all dry and hot air; the second fan 255 drives the air through the outer surface of the heating tube group 252, and the heating tube group 252 heats both the air and the water simultaneously, so that the air coming out of the wet air outlet 257 is all humid and hot air. Then, the dry and hot air and the humid and hot air are both introduced into the air volume mixing and adjusting device 258 for mixing and adjusting to obtain the hot air with a required humidity. The remaining humid and hot air is discharged to the outside, and the humidity of the output hot air can be adjusted according to the humidity of the air inside the outer cover 21, so as to have a better heating effect on the glue cured on the glue adhering roller 9.

[0196] In the embodiment of the present invention, the heating tube 2520 includes:

[0197] An outer heat conducting tube 2524;

[0198] An inner heat conducting tube 2525, and the inside of the inner heat conducting tube 2525 is provided with heating holes 2522;

[0199] Electric heating wire 2526;

[0200] Wherein, the outer heat conducting tube 2524 is sleeved outside the inner heat conducting tube 2525, and the electric heating wire 2526 is spirally sealed between the outer heat conducting tube 2524 and the inner heat conducting tube 2525.

[0201] By adopting the above technical solution, the electric heating wire 2526 can heat the inner wall and the outer wall of the heating tube 2520 simultaneously, and the structure is simple.

[0202] In the embodiment of the present invention, it further includes:

[0203] A first pressure relief valve 28, the inlet end of the first pressure relief valve 28 is connected to the outlet end of the filter box 13, and the outlet end of the first pressure relief valve 28 is connected to the glue storage box 12.

[0204] By adopting the above technical solution, when the pressure in the glue box 8 exceeds the opening pressure of the first pressure relief valve 28, the first pressure relief valve 28 opens to directly introduce the glue sent by the filter box 13 into the glue storage box 12, so that the pressure in the glue box 8 is maintained within a certain range, effectively avoiding the situation that the glue in the glue box 8 overflows due to excessive amount.

[0205] 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 principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gluing machine applied to the production of chocolate cartons, characterized in that, The glue applicator includes: A glue storage tank (12) which stores glue inside; A filter tank (13) which is used to filter the glue in the glue storage tank (12) and send it into the glue box (8); A first cavity (15), a second cavity (16) and a third cavity (17) are formed in the filter tank (13). An annular accommodation groove (150) is formed on the side wall of the first cavity (15). The accommodation groove (150) is isolated from the first cavity (15) by an annular retaining net (151). A number of through holes are formed on the retaining net (151). The filter tank (13) is provided with a first passage (130) connecting the outside and the accommodation groove (150), a second passage (131) connecting the first cavity (15) and the second cavity (16), a third passage (132) connecting the first cavity (15) and the third cavity (17), a fourth passage (133) connecting the outside and the third cavity (17), and a fifth passage (134) connecting the outside and the second cavity (16). The first passage (130) is connected to the glue storage tank (12) through a first conduit (18) and extends below the liquid level. The second cavity (16) and the third cavity (17) are connected. A flow regulating device is provided in the first cavity (15); A second sealing block (160) is provided in the second cavity (16). A telescopic rod (161) is provided on one side of the second sealing block (160). The telescopic rod (161) is connected to a driving mechanism (19). A third sealing block (170) for isolating the second cavity (16) and the third cavity (17) is provided in the third cavity (17). A spring (171) is provided on the side of the third sealing block (170) away from the second cavity (16). The second sealing block (160) can extend into the third cavity (17) to drive the third sealing block (170) to slide. Check valves (135) are provided in the second passage (131), the third passage (132), the fourth passage (133) and the fifth passage (134). The second cavity (16) sends the glue into the glue box (8) through the fifth passage (134). The check valve (135) in the second passage (131) is set to flow towards the second cavity (16). The check valve (135) in the third passage (132) is set to flow towards the third cavity (17). The check valves (135) in the fourth passage (133) and the fifth passage (134) are both set to flow towards the outside; The shape of the second sealing block (160) corresponds to the inner wall of the second cavity (16), the shape of the third sealing block (170) corresponds to the third cavity (17), and there is a gap between the second sealing block (160) and the third sealing block (170) when the second sealing block (160) is in the initial position. The third sealing block (170) is pressed against the connection between the second cavity (16) and the third cavity (17) by a spring (171). When the telescopic rod (161) is in the contracted state, the second sealing block (160) slides in the second cavity (16) under the action of the driving mechanism (19). When the telescopic rod (161) is in the extended state, the second sealing block (160) slides in the second cavity (16) and the third cavity (17) under the action of the driving mechanism (19). When the second sealing block (160) pushes the third sealing block (170), the second channel (131) and the fifth channel (134) are always kept sealed; A pressure relief valve (137) is provided in front of the one-way valve (135) in the third channel (132); under normal working conditions, the pressure relief valve (137) is in a normally closed state; only when the spring (171) resets to push the third sealing block (170), the negative pressure generated in the third cavity (17) can open the pressure relief valve (137).

2. The gluing machine applied to the production of chocolate cartons according to claim 1, wherein, The glue applicator further includes: A glue box (8), an opening is provided on the upper side of the glue box (8), and a scraper (80) is provided at the edge of the opening; A glue adhering roller (9), the side wall of the glue adhering roller (9) extends into the glue box (8) and contacts and seals with the scraper (80).

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