Film covering packaging machine for packaging carton production

Abstract

The invention relates to the technical field of packaging equipment, in particular to a film covering packaging machine for packaging carton production, which comprises a rack, a discharging roller, an opening roller, a first paper conveying roller, a conveying belt, a composite roller group, a calendaring roller group, a second paper conveying roller and a third paper conveying roller, upper cutting modules are installed on the conveying belt at equal intervals, cutters are installed in the upper cutting modules, the upper cutting modules between the two cartons collect hot melt adhesive gathered on a film when passing through the composite roller set and the calendaring roller set, and the cutters move upwards to cut off the film when the upper cutting modules pass through the calendaring roller set. When passing through the first paper conveying roller, the cutter is continuously jacked up by the multiple protruding edges to remove the hot melt adhesive collected by the upper cutting module, and protection of thin cartons during film covering is achieved in the mode that one conveying belt is used for conveying the cartons at equal intervals, the hot melt adhesive is collected and a thin film is cut.

Description

Technical Field

[0001] The invention relates to the technical field of packaging equipment, in particular to a film laminating packaging machine for producing packaging cartons. Background Art

[0002] Packaging makes products more valuable and facilitates the transportation and storage of products. Therefore, packaging cartons are very common in life. In order to further improve the exquisiteness of packaging cartons and their moisture-proof and anti-corrosion functions, laminating technology has also emerged. Laminating packaging machines for packaging carton production can be divided into instant coating type and pre-coating type according to the laminating method. Compared with the instant coating type, the pre-coating type has no glue coating and drying structure, so it is small in size, low in cost, easy to operate, and has broad application prospects.

[0003] The core principle of the laminating packaging machine for the production of pre-coated packaging cartons is to heat the film that has been pre-coated with hot melt adhesive, melt the hot melt adhesive to restore its viscosity, and at the same time, make the film contact and bond with the surface of the carton. Figure 1 The carton enters the heating zone via the conveyor belt 1. The heating zone is composed of a hot roller and upper and lower pressure rollers. The hot roller melts the hot melt adhesive on the film through its own heating function, and together with the lower pressure roller 1, adheres the film to the carton. The upper and lower pressure rollers 2 located at the next station further compact the coated carton.

[0004] In order to ensure the above compaction effect, the distance between the upper pressure roller and the lower pressure roller 2 will be smaller than the distance between the hot roller and the lower pressure roller 1, so that the film and the cardboard between the upper pressure roller and the lower pressure roller 2 will be subjected to greater pressure, thereby improving the adhesion and smoothness of the coating. However, it is inevitable that the hot melt adhesive on the film will also be squeezed and gathered at the place where the film is not attached to the cardboard, especially the hot melt adhesive gathered at the gap between the two cardboards, which will cause the following consequences: when the gap between the cardboards passes through the upper pressure roller and the lower pressure roller 2 (at this time there is no cardboard bonded under the film), especially when the cardboard with thinner coating (such as the cardboard of the toy packaging box, which is not only thinner, but also not as hollow as corrugated paper, and its side has poor adsorption effect on the hot melt adhesive at the gap), the hot melt adhesive gathered on the lower surface of the film will contact and adhere to the lower pressure roller 2, thereby causing the following damage to the carton:

[0005] 1. When the hot melt adhesive adhered to the lower pressure roller 2 is sticky, it will adhere to the lower surface of the carton, making it difficult for the carton to be separated from the lower pressure roller 2 and easy to be damaged;

[0006] 2. When the hot melt adhesive adhering to the lower pressing roller 2 is not sticky, the local thickness of the lower pressing roller 2 will still increase, so that the distance between the upper pressing roller and the lower pressing roller 2 will be further reduced, thereby further increasing the pressure of the two on the carton, causing the carton to wrinkle.

[0007] In order to avoid damage and wrinkles of thinner packaging cartons during the laminating process, a laminating packaging machine for packaging carton production is proposed. Summary of the invention

[0008] The object of the present invention is to provide a laminating packaging machine for the production of packaging cartons, which solves the problem that thin packaging cartons are easily damaged and wrinkled during the laminating process. By using a conveyor belt to convey cartons at equal intervals and utilizing the positional relationship between the conveyor belt and each group of rollers to store hot melt adhesive and cut film, the film and the lower pressure roller are isolated, and the hot melt adhesive at the intervals between the cartons is cleaned.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A film laminating packaging machine for producing packaging cartons, comprising a frame, a feeding roller, an opening roller, a first paper feeding roller, a conveyor belt, a composite roller group, a calendering roller group, a second paper feeding roller and a third paper feeding roller, the feeding roller is wound with a film for laminating, the film passes through the opening roller, the composite roller group and the calendering roller group, convex edges are arranged at equal intervals on the circumference of the first paper feeding roller, the first paper feeding roller, the second paper feeding roller and the third paper feeding roller are respectively on the left side, the right side and the bottom side of the composite roller group, the conveyor belt is wound on the first paper feeding roller, the second paper feeding roller and the third paper feeding roller and driven by the second paper feeding roller, and the conveyor belt passes through the composite roller group and the calendering roller group, upper cutting modules are installed on the conveyor belt at equal intervals, carton pieces are placed between adjacent upper cutting modules, and a cutter is installed inside the upper cutting module;

[0011] The carton pieces are driven by the conveyor belt and squeezed by the composite roller group and the calendering roller group in sequence to complete the coating and compaction. The upper cutting module between the two cartons collects the hot melt adhesive accumulated on the film when passing through the composite roller group and the calendering roller group, and the cutter of the upper cutting module moves upward to cut the film when passing through the calendering roller group. When the cutter passes through the first paper feeding roller, it is continuously lifted up by multiple ridges to remove the hot melt adhesive collected by the upper cutting module.

[0012] In the existing laminating packaging machine for packaging carton production, the carton needs to be cut by a slitting machine after the lamination is completed to separate it from the film as a whole. Whether the carton is discharged manually or by machine, it is difficult to ensure the absolute uniformity of the carton spacing. Therefore, a photoelectric detection device is often installed before the slitting machine so that the slitting machine can accurately cut. There is room for improvement in such a design: first of all, the slitting machine and the photoelectric detection device themselves are expensive, and the linkage between the two requires an additional implantation of a control system, which further increases the production cost; in addition, relying solely on the coordination of "detection" and "slitting", the interval between cartons cannot be effectively controlled. In the prior art, when the carton is coated with a thinner film, the lower pressure roller can be prevented from adhering to the hot melt adhesive by reducing the interval, but the smaller interval will have higher requirements on the coordination accuracy of "detection" and "slitting", and it is easy to cause the carton to be cut by mistake; and when the interval is increased due to uncontrollable factors (such as the uncertainty of manual discharge), it will cause too much waste of film at the interval, which will increase the production cost. In view of the above situation, this solution uses a conveyor belt to cover the lower pressure roller to prevent the lower pressure roller from sticking to the hot melt adhesive, thereby protecting the carton. At the same time, blocks are set at equal intervals on the conveyor belt, that is, the upper cutting module, so that the spacing between the cartons can be maintained at a fixed value. Of course, such a design will limit the scope of use of the laminating machine, because for different cartons, it is necessary to install a conveyor belt with different block spacing. Therefore, the present invention is more suitable for laminating large quantities of thinner packaging cartons (such as hand-made packaging boxes, electronic device packaging boxes, etc.).

[0013] By setting the upper cutting module, the use of the photoelectric detection device can be avoided. In order to make the slitting more stable, it is considered to connect the slitting machine more closely with the conveying process of the carton. The prior art fixes the slitting machine at a certain position, while the carton is in motion, so it is difficult to control the slitting position. Therefore, it is considered to arrange the slitting device on the upper cutting module, so that it is located at the interval between the two cartons and remains relatively still with the carton. When the slitting device is working, it can slit the film more stably and simply.

[0014] Preferably, the composite roller group includes a hot roller and a concave roller from top to bottom, and the hot roller and the concave roller are both connected to the frame. The middle part of the circumference of the concave roller is provided with a groove. The calendering roller group includes an upper roller and a lower roller from top to bottom, and the upper roller and the lower roller are both connected to the frame. The upper cutting module also includes a shell and a propulsion part, and the shell is connected to the conveyor belt. The inside of the shell is provided with teeth and guide rods from top to bottom, and the cutter is plugged into the guide rod.

[0015] Through the above scheme, when the upper cutting module moves between the hot roller and the concave roller, the groove can accommodate the cutter to prevent the cutter from cutting the film (the reason for avoiding cutting at this time: the film is collected by the film adhered to the carton and moved together with the carton. If the cutting is completed during the lamination, the power for film collection is missing. Therefore, the cutting is carried out during the compaction process.); when the upper cutting module moves between the upper roller and the lower roller, the roller surface of the lower roller causes the cutter to move upward to complete the cutting of the film.

[0016] The upper cutting module needs to pass between the upper roller and the lower roller, and the height of the passing part should be less than the height of the carton. However, a smaller height will weaken the supporting effect on the carton. The conveying of carton depends on two aspects of power: one is the static friction between the carton and the conveyor belt; the other is the support provided by the upper cutting module. Obviously, the latter provides more sufficient and more stable power. Therefore, we need to try to improve the upper cutting module to push the carton more stably.

[0017] Preferably, the width of the hot roller and the upper roller is smaller than the width of the conveyor belt, the propulsion part is arranged on the front and rear sides of the shell, the lower end of the propulsion part is connected to the conveyor belt, and the upper end of the propulsion part is above the tooth part.

[0018] Through the above scheme, the higher propulsion part can stably push the carton pieces without being blocked by the hot roller and the upper roller. In addition, through the connection between the propulsion part and the conveyor belt, the structural strength of the conveyor belt after slotting can be enhanced (the sliding of the cutter requires space, so the conveyor belt needs to be slotted).

[0019] During slitting, if the cutter is in direct contact with the upper roller, both will wear out at a faster rate, and the continuous impact caused by the collision between the two will be detrimental to preventing the connection components from loosening.

[0020] Preferably, the upper roller is configured as a shuttle-shaped structure, and a connecting portion is provided in the middle of the circumference of the upper roller, the connecting portion is knurled, and a silicon sleeve is wrapped on the connecting portion, and the silicon sleeve contacts the film.

[0021] Through the above scheme, the shuttle-shaped structure of the upper roller makes it easy to install the silicone sleeve, and the knurling treatment of the connecting part enhances the stability of the connection of the silicone sleeve on the upper roller. The elasticity of the silicone sleeve itself enables the cutter to cut the film more thoroughly, and through the flexible contact between the silicone sleeve and the film, the upper roller and the lower roller will compact the carton coating more tightly.

[0022] Due to the pressure between the heated roller and the concave roller (laminating process), and the pressure between the upper roller and the lower roller (compacting process), the hot melt adhesive on the film will gather at the intervals of the carton, so try to collect the gathered hot melt adhesive.

[0023] Preferably, the tooth portion includes a first tooth and a butt tooth from top to bottom, the top of the first tooth is set as an inclined surface, the butt tooth abuts the left and right sides of the cutter, and the minimum left and right spacing of the butt tooth is smaller than the minimum left and right spacing of the first tooth.

[0024] Through the above scheme, a gap is created between the first tooth and the cutter, and the inclined surface of the first tooth is used to guide the gathered hot melt adhesive to the inside of the tooth portion, so as to collect the hot melt adhesive; at the same time, the cutter is positioned in the left and right directions by using the abutting tooth with a smaller distance from the cutter, and the friction during the sliding process of the cutter is reduced by taking advantage of the smaller contact area between the two.

[0025] Preferably, the cutter comprises a cutter head, a cutter body, a guide portion and a cutter tail from top to bottom, the left and right cutter surfaces of the cutter head are respectively arranged as an inclined surface and a vertical surface, the guide portion is plugged into a guide rod, and the cutter tail is arranged as a fan-shaped structure.

[0026] Through the above scheme, the center of the fan-shaped structure at the tail of the knife is on the left side of the blade of the knife head. When the cutter is fully upward, the blade of the knife head is located to the right of the center, that is, there is a certain space above the film, and this space is used for better cutting; in addition, due to the action of the composite roller group and the smoothing roller group, more hot melt adhesive will be squeezed out from the right side of the gap, and the design of the knife head can push the hot melt adhesive to the left when it goes up, so that the hot melt adhesive is more evenly distributed on the side of the carton, and the hot melt adhesive can also enter the teeth more evenly, thereby avoiding the phenomenon of excessive hot melt adhesive between the right side of the cutter and the teeth, which is difficult to clean.

[0027] Preferably, the guide rod portion above the guide portion is installed with a spring, and the first paper feed roller is fixedly connected to the frame, so that the conveyor belt slides on the first paper feed roller, thereby causing the ridge to continuously lift the cutter, and the cutter is lowered with the help of the spring, thereby achieving the removal of the hot melt adhesive collected by the teeth through continuous lifting and falling.

[0028] Preferably, the ridges are arranged as arc-shaped structures, and each ridge is discontinuous. The arc-shaped and discontinuous ridges are helpful to reduce the friction between the conveyor belt and the first paper feeding roller.

[0029] The hot melt adhesive collected in the teeth will gradually solidify as the conveyor belt moves. If you wait until the hot melt adhesive is completely solidified before cleaning it, it will be more difficult to clean (specifically, the collision of the ridges with the tail of the cutter will be stronger). To avoid this phenomenon, the hot melt adhesive is destroyed during the solidification process.

[0030] Preferably, the front and rear sides of the circumference of the third paper feed roller both have curvature, and the middle part of the third paper feed roller has no curvature, and the second paper feed roller is consistent with the third paper feed roller.

[0031] Through the above scheme, with the help of the curvature of the front and rear sides of the second paper feed roller and the third paper feed roller, the conveyor belt is automatically centered during operation, and during the operation of the conveyor belt, the middle part of the second paper feed roller and the third paper feed roller is used to lift the cutter to destroy the hot melt adhesive that is gradually solidified in the teeth, so that the ridges can be cleaned more easily.

[0032] Preferably, the middle parts of the circumferences of the lower roller, the second paper feed roller and the third paper feed roller are hardened to improve wear resistance so as to cooperate with the cutter more stably, and the surface of the ridge is polished and hardened to reduce friction between the ridge and the conveyor belt.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention blocks the contact between the film and the lower pressure roller by covering the lower pressure roller with a conveyor belt, and arranges an upper cutting module on the conveyor belt to make the slitting more stable while collecting and cleaning the hot melt adhesive at the intervals between cartons, thereby avoiding damage to the cartons by the hot melt adhesive accumulated at the intervals between cartons.

[0035] 2. The present invention combines the original two conveyor belts into one, and makes the integrated conveyor belt pass through the composite roller group and the calendering roller group, so that the hot melt adhesive on the film directly contacts the conveyor belt, and further arranges an upper cutting module at the contact position between the hot melt adhesive and the conveyor belt, so that the upper cutting module provides movement support for the carton pieces, and at the same time, the spacing between the carton pieces is fixed and can be stably cut under the action of the cutter and the lower roller.

[0036] 3. The present invention introduces the hot melt adhesive at the intervals between the carton pieces into the teeth through the design of the upper cutting module, and gathers it on the left and right sides of the cutter to complete the collection of the hot melt adhesive. At the same time, through the design of the convex ridges on the first paper feeding roller, the cutter can slide continuously in the teeth to grind and discharge the solidified hot melt adhesive in the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural schematic diagram of an existing film-laminating packaging machine for producing packaging cartons;

[0038] Figure 2 It is a schematic diagram of the overall isometric structure of the present invention;

[0039] Figure 3 For the present invention Figure 2 The enlarged schematic diagram of part A in the middle;

[0040] Figure 4 For the present invention Figure 3 The enlarged schematic diagram of part B in the middle;

[0041] Figure 5 The overall front view structural diagram of the present invention is

[0042] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of part C in the middle;

[0043] Figure 7 For the present invention Figure 2 The enlarged schematic diagram of part D in the middle;

[0044] Figure 8 It is a schematic diagram of the overall equiaxial structure with a cross-section of a composite roller group of the present invention;

[0045] Fig. 9 For the present invention Figure 8 Enlarged schematic diagram of part E in the middle.

[0046] In the figure: 1, frame; 2, unloading roller; 21, film; 3, opening roller; 4, first paper feeding roller; 41, convex ridge; 5, conveyor belt; 51, upper cutting module; 511, cutter; 5111, cutter head; 5112, cutter body; 5113, guide part; 5114, cutter tail; 512, shell; 5121, tooth part; 51211, first tooth; 51212, butt tooth; 5122, guide rod; 5123, spring; 513, propulsion part; 52, carton part; 6, composite roller group; 61, hot roller; 62, concave roller; 621, groove; 7, calendering roller group; 71, upper roller; 711, connecting part; 712, silicon sleeve; 72, lower roller; 8, second paper feeding roller; 9, third paper feeding roller. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figures 1 to 9 The present invention provides a film-laminating packaging machine for producing packaging cartons, and the technical solution is as follows:

[0049] Reference Figure 2 and Figure 7A film laminating packaging machine for producing packaging cartons includes a frame 1, a discharge roller 2, an opening roller 3, a first paper feeding roller 4, a conveyor belt 5, a composite roller group 6, a calender roller group 7, a second paper feeding roller 8 and a third paper feeding roller 9. A film 21 for laminating is wound on the discharge roller 2, and the film 21 passes through the opening roller 3, the composite roller group 6 and the calender roller group 7. The first paper feeding roller 4, the second paper feeding roller 8 and the third paper feeding roller 9 are respectively on the left side, the right side and the bottom side of the composite roller group 6. The conveyor belt 5 is wound on the first paper feeding roller 4, the second paper feeding roller 8 and the third paper feeding roller 9 and driven by the second paper feeding roller 8, and the conveyor belt 5 passes through the composite roller group 6 and the calender roller group 7. Upper cutting modules 51 are installed on the conveyor belt 5 at equal intervals, and carton pieces 52 are placed between adjacent upper cutting modules 51, and a cutter 511 is installed inside the upper cutting module 51. The first paper feed roller 4 is fixedly connected to the frame 1, so that the conveyor belt 5 keeps sliding on the first paper feed roller 4, so that the ridges 41 constantly lift the cutter 511. The ridges 41 are welded on the circumference of the first paper feed roller 4 at equal intervals. After welding, the circumference of the first paper feed roller 4 is polished smooth with a grinding wheel to reduce the friction between the conveyor belt 5 and the first paper feed roller 4 and avoid the welding burrs from scratching the cutter 511. The ridges 41 are set as an arc structure, and each ridge 41 is discontinuous, so as to further reduce the friction between the conveyor belt 5 and the first paper feed roller 4. In addition, the number of ridges 41 should be appropriate. Too many ridges cannot well reduce the friction between the first paper feed roller 4 and the conveyor belt 5, and too few ridges have limited cleaning effect on the hot melt adhesive. In this scheme, 16 ridges are arranged, and the disconnected areas of any two adjacent ridges 41 can form a complementary relationship.

[0050] The carton pieces 52 are driven by the conveyor belt 5 and are squeezed by the composite roller group 6 and the calendering roller group 7 in succession to complete the coating and compaction. The upper cutting module 51 between the two carton pieces 52 collects the hot melt adhesive accumulated on the film 21 when passing through the composite roller group 6 and the calendering roller group 7, and the cutter 511 of the upper cutting module 51 moves upward to cut off the film 21 when passing through the calendering roller group 7. When the cutter 511 passes through the first paper feeding roller 4, it is continuously lifted up by multiple ridges 41 to remove the hot melt adhesive collected by the upper cutting module 51.

[0051] As an embodiment of the present invention, refer to Figure 2 and Figure 3The composite roller group 6 includes a hot roller 61 and a concave roller 62 from top to bottom. The hot roller 61 and the concave roller 62 are both rotatably connected to the frame 1. A groove 621 is provided in the middle part of the circumference of the concave roller 62. When manufacturing the concave roller 62, the integral roller is first cast, and then the groove 621 is machined by turning. Because the depth of the groove 621 is small, the direct casting effect is not ideal, and further cooperation of the mold is required, while the groove 621 can be easily machined by turning. In addition, when the width of the film 21 to be coated is large, the groove 621 should not be opened as an integral type. Multiple groups of grooves 621 can be opened in the corresponding area to avoid the sinking of the carton part 52 during film coating. Correspondingly, the tail 5114 of the cutter 511 should also be consistent with the position of the groove 621, and be arranged intermittently. The calender roller group 7 includes an upper roller 71 and a lower roller 72 from top to bottom. The upper roller 71 and the lower roller 72 are both rotatably connected to the frame 1. The upper cutting module 51 also includes a shell 512 and a propulsion unit 513. The shell 512 is connected to the conveyor belt 5. The shell 512 is provided with a tooth portion 5121 and a guide rod 5122 from top to bottom. The cutter 511 is inserted into the guide rod 5122 and slides along the guide rod 5122. The sliding of the cutter 511 requires space, so the conveyor belt 5 needs to be slotted. However, the strength of the conveyor belt 5 will be weakened after the slotting. Therefore, the following design is made: the width of the hot roller 61 and the upper roller 71 is smaller than the width of the conveyor belt 5. The propulsion unit 513 is arranged on the front and rear sides of the shell 512. The lower end of the propulsion unit 513 is connected to the conveyor belt 5, and the upper end of the propulsion unit 513 is above the tooth portion 5121, so that the propulsion unit 513 can stably push the carton 52. The shell 512 and the propulsion unit 513 are bonded to the conveyor belt 5. The structural strength of the conveyor belt 5 is improved by bonding the conveyor belt 5 to the two. In addition, in order to avoid direct contact between the cutter 511 and the upper roller 71 and to provide a buffer for the "slitting" process, the following design is performed: the upper roller 71 is set as a shuttle structure, and a connecting portion 711 is provided in the middle of the circumference of the upper roller 71. The connecting portion 711 has no curvature and a flat surface to achieve stable film coating. The connecting portion 711 is knurled and is wrapped with a silicon sleeve 712, which contacts the film 21.

[0052] As an embodiment of the present invention, refer to Figures 4 to 6The tooth portion 5121 includes a first tooth 51211 and a butt tooth 51212 from top to bottom. The top of the first tooth 51211 is set as an inclined surface. The butt tooth 51212 butts against the left and right sides of the cutter 511, and the minimum left-right spacing of the butt tooth 51212 is smaller than the minimum left-right spacing of the first tooth 51211. The cutter 511 includes a cutter head 5111, a cutter body 5112, a guide portion 5113 and a cutter tail 5114 from top to bottom. The left and right cutter surfaces of the cutter head 5111 are respectively set as an inclined surface and a vertical surface. The guide portion 5113 is plugged into the guide rod 5122, and the cutter tail 5114 is set as a fan-shaped structure. A spring 5123 is installed on the guide rod 5122 above the guide portion 5113. In order to prevent the hot melt adhesive from adhering to the cutter 511 and the tooth portion 5121, an isolation coating is sprayed on the surface of the cutter 511 and the tooth portion 5121. In addition, in order to make it easier for the cutter 511 that continuously slides in the tooth portion 5121 under the action of the ridge 41 and the spring 5123 to discharge the ground hot melt adhesive, a through hole is arranged above the inclined surface of the tooth 51212. Regarding the manufacture of the tooth portion 5121, the left half shell 512 and the right half shell 512 can be manufactured in a separate form, and the left half tooth portion 5121 and the right half tooth portion 5121 are processed on the left half shell 512 and the right half shell 512 respectively, and then the left half shell 512 and the right half shell 512 are bonded together.

[0053] As an embodiment of the present invention, refer to Figure 2 , the front and rear sides of the circumference of the third paper feed roller 9 are both curved, and the middle part of the third paper feed roller 9 has no curvature, and the second paper feed roller 8 is consistent with the third paper feed roller 9. The second paper feed roller 8 and the third paper feed roller 9 are both slidably connected to the frame 1. When connected, the bearing seat is first installed on the frame 1, and the roller shaft is set in the bearing seat, and then the first paper feed roller 4 and the second paper feed roller 8 are sleeved on the roller shaft. The middle part of the circumference of the lower roller 72, the second paper feed roller 8 and the third paper feed roller 9 is hardened, and the surface can be shot peened or quenched to improve the wear resistance, so as to work more stably with the cutter 511. The surface of the convex rib 41 is polished and hardened to reduce the friction between the convex rib 41 and the conveyor belt 5.

[0054] Working principle: Refer to Figure 1 and Figure 2, the present invention integrates the conveyor belt 5 into one and passes through the composite roller group 6 and the calender roller group 7, so as to avoid the contact between the film 21 and the lower roller 72, thereby protecting the carton pieces 52 from damage and wrinkles. Furthermore, in order to fix the position of the carton pieces 52 at intervals on the conveyor belt 5, so as to more uniformly handle the hot melt adhesive accumulated at the intervals of the carton pieces 52, the upper cutting modules 51 are arranged at equal intervals on the conveyor belt 5 according to the specifications of the packaged carton pieces 52. Furthermore, in order to make the slitting effect of the carton pieces 52 after lamination more stable and accurate, the slitting machine originally fixed on the frame 1 is converted into the upper cutting module 51, so that the "slitting" can be carried out under the relative stillness of the upper cutting module 51 and the carton pieces 52.

[0055] Specifically, the carton piece 52 is placed between the two upper cutting modules 51 from the left end of the conveyor belt 5, and the carton piece 52 moves to the right by means of the static friction between itself and the conveyor belt 5, and the supporting force of the upper cutting module 51 on its left side.

[0056] Reference Figure 8 and Fig. 9 During the rightward movement of the carton 52, it first passes through the composite roller group 6, and is bonded to the film 21 under the pressure of the hot roller 61 and the concave roller 62. During this process, in order to prevent the cutter 511 from cutting the film 21 when it moves upward, so that the film 21 loses the power to collect the material, a groove 621 is provided in the middle of the circumference of the concave roller 62 to accommodate the cutter 511.

[0057] The carton piece 52 continues to move to the right, and when it passes through the calendering roller group 7, in order to obtain a better compaction effect, the distance between the upper roller 71 and the lower roller 72 will be smaller than the distance between the hot roller 61 and the concave roller 62. Therefore, the carton piece 52 that has completed the coating will be subjected to greater pressure, so that when the gap between the two carton pieces 52 passes through the calendering roller group 7, the hot melt adhesive on the carton piece 52 on the right side of the gap is squeezed to the gap. Through the setting of the upper cutting module 51, the hot melt adhesive gathered at the gap will not directly contact the conveyor belt 5, thereby avoiding the damage caused by the adhesion of the carton piece 52 to the conveyor belt 5. More specifically, a tooth portion 5121 is provided in the housing 512 of the upper cutting module 51. Through the inclined surface design of the first tooth 51211 and the abutting tooth 51212 on the tooth portion 5121, and the arrangement of the first tooth 51211, the abutting tooth 51212 and the cutter 511 at different intervals, the hot melt adhesive gathered at the interval can flow into the tooth portion 5121 and adhere to the left and right sides of the cutter 511, thereby completing the collection of the hot melt adhesive at the interval. At the same time, the tail 5114 of the cutter 511 will contact the circumference of the lower roller 72 and be continuously lifted until it reaches the highest point, so that the cutter head 5111 completes the slitting of the film 21. As mentioned above, the hot melt adhesive gathered at the interval mainly comes from the carton piece 52 on the right side of the interval, so the content of the hot melt adhesive at the interval gradually decreases from right to left, so more hot melt adhesive is pushed to the carton piece 52 on the left side of the interval through the single bevel design of the cutter head 5111, so that the hot melt adhesive bonded on the side of the carton piece 52 is uniform. And through the single bevel design of the cutter head 5111, the blade of the cutter head 5111 can be biased to the right side of the center of the blade tail 5114, so that the cutter head 5111 coincides with the left and right symmetric plane of the calender roller group 7, so that when the slitting is completed, the cutter 511 is not lifted to the highest point, and as the lifting continues, the cutter head 5111 moves to the right side of the left and right symmetric plane of the calender roller group 7 to obtain a larger upward space, so as to more thoroughly slit the film 21. The coated and slit carton piece 52 continues to move to the right along the conveyor belt 5 and is discharged at the second paper feeding roller 8.

[0058] During the continuous operation of the conveyor belt 5, the hot melt adhesive collected by the tooth portion 5121 will gradually solidify. In order to remove the solidified hot melt adhesive, the first paper feed roller 4 is fixedly connected to the frame 1, and discontinuous ridges 41 are arranged at equal intervals on the circumference of the first paper feed roller 4, so that the conveyor belt 5 can slide relatively on the first paper feed roller 4, and the ridges 41 can continuously lift the cutter 511, so that the cutter 511 can continuously slide in the tooth portion 5121 to grind the solidified hot melt adhesive, and discharge the ground hot melt adhesive along the inclined surface of the guide portion 5113 and the inclined surface of the knife tail 5114.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A film laminating packaging machine for producing packaging cartons, comprising a frame (1), a feeding roller (2), an opening roller (3), a first paper feeding roller (4), a conveyor belt (5), a composite roller group (6), a calender roller group (7) and a second paper feeding roller (8), wherein a film (21) for laminating is wound around the feeding roller (2), and the film (21) passes through the opening roller (3), the composite roller group (6) and the calender roller group (7), and is characterized in that: It also includes a third paper feeding roller (9), the circumference of the first paper feeding roller (4) is provided with ridges (41) at equal intervals, the conveyor belt (5) is wound around the first paper feeding roller (4), the second paper feeding roller (8) and the third paper feeding roller (9) and is driven by the second paper feeding roller (8), and the conveyor belt (5) passes through a composite roller group (6) and a calendering roller group (7), upper cutting modules (51) are installed on the conveyor belt (5) at equal intervals, carton pieces (52) are placed between adjacent upper cutting modules (51), and a cutter (511) is installed inside the upper cutting module (51); The carton pieces (52) are driven by the conveyor belt (5) and are squeezed by the composite roller group (6) and the calendering roller group (7) to complete the lamination and compaction. The upper cutting module (51) between the two carton pieces (52) passes through the composite roller group (6) and the calendering roller group (7) and collects the hot melt adhesive accumulated on the film (21). When the upper cutting module (51) passes through the calendering roller group (7), the cutter (511) moves upward to cut the film (21). When the cutter (511) passes through the first paper feeding roller (4), it is continuously lifted by a plurality of ridges (41) to remove the hot melt adhesive collected by the upper cutting module (51).

2. The film-laminating packaging machine for producing packaging cartons according to claim 1, characterized in that: The composite roller group (6) comprises, from top to bottom, a hot roller (61) and a concave roller (62), both of which are connected to the frame (1), and a groove (621) is provided in the middle part of the circumference of the concave roller (62). The calendering roller group (7) comprises, from top to bottom, an upper roller (71) and a lower roller (72), both of which are connected to the frame (1). The upper cutting module (51) also comprises a shell (512) and a propulsion part (513), and the shell (512) is connected to the conveyor belt (5). A tooth part (5121) and a guide rod (5122) are provided inside the shell (512) from top to bottom, and the cutter (511) is plugged into the guide rod (5122).

3. The film-laminating packaging machine for producing packaging cartons according to claim 2, characterized in that: The widths of the hot roller (61) and the upper roller (71) are smaller than the width of the conveyor belt (5); the propulsion portion (513) is arranged on the front and rear sides of the shell (512); the lower end of the propulsion portion (513) is connected to the conveyor belt (5), and the upper end of the propulsion portion (513) is above the tooth portion (5121).

4. The film-laminating packaging machine for producing packaging cartons according to claim 2, characterized in that: The upper roller (71) is configured as a shuttle-shaped structure, and a connecting portion (711) is provided in the middle of the circumference of the upper roller (71), the connecting portion (711) is knurled, and a silicon sleeve (712) is wrapped on the connecting portion (711), and the silicon sleeve (712) contacts the film (21).

5. The film-laminating packaging machine for producing packaging cartons according to claim 4, characterized in that: The tooth portion (5121) comprises a first tooth (51211) and a butt tooth (51212) from top to bottom, the top of the first tooth (51211) is arranged as an inclined surface, the butt tooth (51212) butts against the left and right sides of the cutter (511), and the minimum left-right spacing of the butt tooth (51212) is smaller than the minimum left-right spacing of the first tooth (51211).

6. The film-laminating packaging machine for producing packaging cartons according to claim 5, characterized in that: The cutting knife (511) comprises, from top to bottom, a cutting head (5111), a cutting body (5112), a guiding portion (5113) and a cutting tail (5114); the left and right cutting surfaces of the cutting head (5111) are respectively arranged as an inclined surface and a vertical surface; the guiding portion (5113) is plugged into a guiding rod (5122); and the cutting tail (5114) is arranged as a fan-shaped structure.

7. The film-laminating packaging machine for producing packaging cartons according to claim 6, characterized in that: The guide rod (5122) above the guide portion (5113) is partially installed with a spring (5123), and the first paper feeding roller (4) is fixedly connected to the frame (1).

8. The film-laminating packaging machine for producing packaging cartons according to claim 7, characterized in that: The convex ridges (41) are arranged as arc-shaped structures, and each convex ridge (41) is discontinuous.

9. The film-laminating packaging machine for producing packaging cartons according to claim 1, characterized in that: The front and rear sides of the circumference of the third paper feeding roller (9) both have curvature, and the middle part of the third paper feeding roller (9) has no curvature, and the second paper feeding roller (8) is consistent with the third paper feeding roller (9).

10. The film-laminating packaging machine for producing packaging cartons according to claim 2, characterized in that: The middle parts of the peripheral surfaces of the lower roller (72), the second paper feeding roller (8) and the third paper feeding roller (9) are all hardened, and the surface of the convex ridge (41) is polished and hardened.

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