Method for binding paper board, package box mfg. method and package box

[0042] Example 1

[0043] FIG. 1 is a partially enlarged perspective view illustrating the cardboard sticking method according to the first embodiment of the present invention, and FIG. 2 is a flowchart illustrating the cardboard sticking method according to the first embodiment.

[0044] 1 and 2, a first cardboard 110 and a second cardboard 120 are provided, and the end portions of the second cardboard 120 are folded to form an adhesive sheet 125.

[0045] The end of the first cardboard 110 and the adhesive sheet 125 are pasted and fixed, thereby combining the first cardboard 110 and the second cardboard 120 into one body.

[0046] The first adhesive agent I and the second adhesive agent II are coated side by side on the end of the first cardboard 110. As the first adhesive agent I, a hot-melt adhesive was used, and as the second adhesive agent II, an aqueous emulsion adhesive polysol was used. The first adhesive agent I hot-melt adhesive agent is a solid adhesive agent, which has fluidity when heated and melted, and can be easily coated on the first cardboard 110, but it is quickly exposed to normal temperature by spraying from an applicator. Cool the paste to be pasted. Moreover, the second adhesive II polysol is an independent EVA (Ethylene Vinyl Acetate) or a copolymer with AcryI-EVA resin, which is used for bonding boxes, etc., and its adhesive strength and water resistance are very outstanding. However, polysol has the disadvantages of requiring the moisture inside the adhesive to be absorbed into the cardboard, so the initial adhesive force is lower than that of the hot melt adhesive, and it takes a long time to generate sufficient adhesive force. Therefore, by using the first adhesive agent I and the second adhesive agent II at the same time, not only a good initial adhesive force can be obtained, but also a high adhesive strength can be maintained for a long time.

[0047] Fig. 3 is a schematic diagram illustrating a method of coating the first and second adhesive agents on the cardboard. In FIG. 1, the first and second adhesive agents I and II are alternately applied to the application site, but according to another embodiment of the present invention, the first and second adhesive agents I and II can be applied in various forms.

[0048] In Figure 3(a), the first and second adhesive agents I and II are alternately applied in the diagonal direction, while in Figure 3(b), the first and second adhesive agents I and II are applied across each other . However, as described above, when the first adhesive agent I is a hot-melt adhesive agent and the second adhesive agent II is a soluble polysol, the hot-melt adhesive and the soluble polysol cross or contact each other to reduce the temperature. Therefore, you should pay attention to Figure 3 The method shown in (b) has a higher probability of poor adhesion than other methods.

[0049] In addition, in this embodiment, the first and second adhesives I and II are simultaneously coated on the first cardboard 110, but according to other embodiments of the present invention, the first and second adhesives I and II may be coated on Different cardboard. At this time, the cardboard is brought into contact with each other, so that different adhesive properties can be exerted.

[0050] Example 2

[0051] 4 is a front view of a mother board illustrating a packaging box and a manufacturing method thereof according to a second embodiment of the present invention, and FIGS. 5a and 5b are perspective views illustrating a packaging box and a manufacturing method thereof according to the second embodiment.

[0052] 4 to 5a, the packaging box 200 includes a bottom plate 210 and a side wall portion, and the bottom plate 210 and the side wall portion are provided by a mother board 201 in the shape of an expanded view. The motherboard 201 includes a bottom plate 210, a first side wall portion 220 and a second side wall portion 230. The bottom plate 210 is formed in the center of the mother board 201, and the four sides of the quadrilateral shape are connected to the first and second side walls 220 and 230 along the folding line. That is, the first side wall plate 220 is formed on two facing edges of the bottom plate 210, and the second side wall plate 230 is formed on the remaining two facing edges of the bottom plate 210. As mentioned above, in this embodiment, the first sidewall panel 220 and the second sidewall panel 230 are connected along the edge of the quadrilateral bottom plate 210 by using the fold line as a medium, and the sidewall panels are folded vertically relative to the bottom plate 210 to form a box shape Box.

[0053] However, according to another embodiment of the present invention, the side wall plates constituting the side wall portion are connected in sequence along the folding line, and a bottom plate is provided at the lower end of each side wall plate, so that the side wall plate and the bottom plate can be connected as a whole. According to other embodiments, the side wall portion composed of the side wall plate may be formed separately from the bottom plate portion. That is, the packaging box described in this embodiment is an example of a box including a bottom plate and a side wall. The packaging box according to the present invention can be understood as including a conventional packaging box including a bottom plate and a side wall. Moreover, the upper plate covering the packaging box can be formed independently or integrally according to the designer's intention.

[0054] Referring again to FIG. 4, adhesive sheets 235 are formed at both ends of the second side wall 230. The adhesive sheet 235 is pasted on the inner surface of the first side wall plate 220, thereby connecting the first side wall plate 220 and the second side wall plate 230, and maintaining the connection, so that the bottom plate and the side wall are kept firm Box shape.

[0055] Generally, a mother board 201 including a bottom board 210 and sidewall boards 120 and 130 is composed of cardboard. Cardboard, as one of the cardboard materials, is composed of paper, which is lighter in material and includes a corrugated structure inside, which can absorb external shocks. At the same time, the characteristics of paper materials are easy to fold and reuse, so they are widely used in a variety of Industry field. However, although the cardboard is a paper material, it has the resilience to restore the original when it is folded. Therefore, it needs to be stuck for a certain period of time during the initial sticking. Moreover, when loading goods and other items in the packing box, force is applied from the inside of the box, and the joint part of the box may be separated.

[0056] According to the manufacturing method of the present invention, the first adhesive agent I with good initial adhesive force and the second adhesive agent II that provide high adhesive strength for a long time are used at the same time. In particular, this manufacturing method, such as being used in mass production of packaging boxes, etc., on a production line, etc., can be effectively applied to situations where the pasting process is completed quickly while providing strong pasting strength. Actually, when manufacturing the packaging box on the production line, it is impossible to fold the motherboard neatly and carefully apply the adhesive. Therefore, there are many inferior products caused by poor adhesion in the manufactured packaging box, and these inferior products are directly discarded, so the manufacturing process Huge time and property losses occurred in the process.

[0057] However, in the production method according to the present invention, a hot melt adhesive is used as the first adhesive agent I, and polysol is used as an aqueous emulsion adhesive agent as the second adhesive agent II. Originally, the first adhesive agent I and the second adhesive agent 11 were used independently for the application of boxes and the like, but the application at the same time can significantly improve the adhesive effect. Specifically, although the first adhesive agent I hot-melt adhesive agent cannot provide very satisfactory adhesive strength, the adhesive agent is quickly combined with cardboard and the like, and the initial application is quick. Therefore, producers can use this rapidity for production lines and so on. Moreover, the second adhesive agent II used at the same time as the first adhesive agent I is polysol, which requires water or solvent to penetrate into the cardboard, so the initial application time is longer, but as long as the bond is formed, it can maintain a very high adhesive strength, which is beneficial Keep the box structure of large-volume boxes or heavy-load boxes. That is, the advantages of the first adhesive agent I and the second adhesive agent II can be used to complement each other's shortcomings. Therefore, when the cardboard box is manufactured on the production line, the appearance of inferior products caused by poor adhesion can be minimized.

[0058] Hereinafter, the manufacturing method of the packaging box according to this embodiment will be described with reference to FIGS. 5a and 5b.

[0059] 5a, the motherboard 201 includes a bottom plate 210, a first side wall plate 220, a second side wall plate 230, and an adhesive sheet 235. When the mother board 201 is automatically moved by a conveyor belt or other conveying device, it passes through the second sprayer 320-2 that sprays the second adhesive agent II and the first sprayer 320-1 that sprays the first adhesive agent I. Since the melted heat-melting adhesive is sprayed by the first sprayer 320-1, the first sprayer 320-1 is placed behind and sprayed later.

[0060] When the mother board 201 passes through the second injector 320-2, the second adhesive agent II is sprayed on the upper surface of the first side wall plate 220. Because the mother board 201 is always moving, the second adhesive II on the first side wall plate 220 is applied in parallel. A sensor is installed near the second injector 320-2, and the sensor senses the passage of the mother board 201. When the mother board 201 reaches a predetermined position, the second injector 320-2 sprays the second adhesive agent II. The first injector 320-1 is located at a position separated by a predetermined distance from the second injector 320-2. When the mother board 201 passes through the first injector 320-1, it sprays heat and melts on the upper side of the first side wall plate 220 ( hot-melt) Adhesive First Adhesive I. The first sprayer 320-1 sprays the first patch I corresponding to the second patch II coating position, and is also applied in parallel. Also, at the same time, the second sprayer 320-2 applies the second adhesive agent II to other application locations on the first side wall plate 220. As in the previous process, the ejector 320-1 coats the first adhesive agent I on the other application locations.

[0061] The first sprayer 320-1 and the second sprayer 320-2 arranged in front and back form a group, respectively spray the first adhesive agent I and the second adhesive agent II, and the first adhesive agent I and the second adhesive agent 11 are respectively applied It is clothed on both ends of the adhesive sheet 235 and the first side wall 220 to form an adhesive area.

[0062] Referring to Figure 5b, the first side wall 220 and the second side wall 230 are folded upwards, and are erected vertically relative to the bottom plate 210, and the adhesive sheets 235 at both ends of the second side wall 230 are folded inward to contact the walking adhesive Location. When a slight force is applied to maintain the backlog for a few seconds, the adhesive sheet 235 and the first side wall 220 are initially bonded by the thermally-melted adhesive to form the box structure of the packaging box 200.

[0063] Moreover, with the folding of the first and second side wall panels 220 and 230, the outer wall panel attached to the outside of the side wall panel is also erected relative to the bottom plate 210, and the bottom end of the outer wall panel protrudes downward from the bottom surface of the bottom plate 210 Form a clip.

[0064] As in the above process, the packaging box 200 manufactured through the production line passes through a series of assembly processes on a rapidly moving conveyor belt. As a result, packaging box producers need to quickly paste cardboard and the like, so they usually use hot melt adhesives. However, the hot-melt adhesive has lower adhesive strength than other adhesives. Therefore, the adhesive part may be separated during transportation of the packaging box 200, and the adhesive part may be separated during storage or transportation of the article. Moreover, it has the disadvantages of reduced heat resistance and lower adhesive force at relatively high temperatures. However, the packaging box manufactured according to the manufacturing method of this embodiment uses hot-melt adhesive, and the initial bonding is good, and the bonding part of the polysol is more firmly bonded over time, regardless of the manufacturing process or the subsequent storage/transportation process. Worry about cracks in the adhesive part. Moreover, it can be applied to the production line, can be quickly pasted, and can significantly reduce the proportion of inferior products in mass production.

[0065] Fig. 6a is a partial side view illustrating a packaging box manufacturing method according to another embodiment of the present invention similar to the first embodiment, and Fig. 6b is a diagram schematically showing the process of Fig. 6a.

[0066] The device shown in FIG. 6a is a box-making device that automatically folds the first side wall plate 220 and the second side wall plate 230, and folds the mother body 201 coated with the first adhesive agent I and the second adhesive agent II to automatically manufacture the box body The shape of the packing box 200.

[0067] 6a and 6b, the box making device includes a frame 332 forming a combined device structure, a hydraulic cylinder device 334 mounted on the upper end of the frame 332, a support body 336 squeezing the mother body 201, and a mother that is folded and moved according to the hydraulic cylinder 334 device A box folding device 338 for the first and second side walls 220 and 230 of the board 201.

[0068] The box making device has a vertical structure, and the mother board 201 entered at the upper end is squeezed downward, and the first and second side wall panels 220 and 230 are sequentially folded. In this way, since the box making device has a vertical device, it is possible to manufacture the packing box 200 without moving or extending the conventional work line. Compared with the conventional horizontal conveyor belt, the first inclined conveyor belt 312 is used to move the mother body 201 upward through the first and second ejectors 320-1, 320-2, and through the first and second ejectors 320-1, 320- At 2 o'clock, the first adhesive agent I and the second adhesive agent 11 are respectively coated on the first side wall plate 220. The mother board 201 coated with the adhesive is conveyed to the box making device.

[0069] The hydraulic cylinder device 334 uses a hydraulic or pneumatic cylinder to move to the box making device along with the mother body 201 and start to start. Through the up and down movement of the hydraulic cylinder, the support body 336 is moved up and down. The supporting body 336 corresponds to the shape of the bottom plate 210, and as the bottom plate 210 is squeezed, it provides the force to fold the sidewall panels 220 and 230 by the moving matrix 201.

[0070] According to the hydraulic cylinder device 334, the motherboard 201 passes through the box folding device 338. When passing through the box folding device 338, the second side wall panel 230 is folded, and then the first side wall panel 220 is folded, and the adhesive sheet 235 and the first side wall panel 220 are pasted.

[0071] After the mother board 201 passes through the box folding device 338, it is located on the lower horizontal conveyor belt 316 in the shape of the packing box 200, and is conveyed by the second inclined conveyor belt 318 to the next operation line.

[0072] As mentioned above, the automatic completion of the box folding and pasting operations can continuously perform the packaging material production speed according to the speed of the work line, and at the same time perform accurate pasting, which can significantly reduce inferior products. At this time, the first adhesive agent I and the second adhesive agent II are coated on the first side wall plate 220, so the sticking speed and strength can be significantly increased, and the sticking can be formed according to the working line speed.

[0073] Example 3

[0074] Fig. 7 is a perspective view illustrating a packaging box machine manufacturing method according to a third embodiment of the present invention.

[0075] The packaging box and the manufacturing method according to the third embodiment use the packaging box 200 according to the second embodiment, and the manufacturing method described in the second embodiment can be continued. For the convenience of description, the packaging box and the manufacturing method thereof according to this embodiment refer to the drawings and descriptions of the previous embodiment.

[0076] Referring to FIG. 7, the packaging box 200 uses a first side wall panel 220 and a second side wall panel 230 to form side walls. A partition 240 is provided inside the packing box 200 to partition the internal space, and both ends of the partition 240 are pasted on the inner surface of the first side wall 220. The divided object 240 includes a divided object center plate 242 in the center and a divided object sticking sheet 244 formed at both ends of the center plate 242. The divided object sticking sheet 244 is folded along the fold line at both ends of the divided object center plate 242, the divided object 240 is formed into a "ㄈ" shape, and a pair of divided objects 240 are arranged facing each other, roughly dividing the inside of the packing box 200 into two section.

[0077] When performing manual work, in order to face the two partitions 240 and stick to the first side wall plate 220, after two workers are placed facing each other, each worker can spray the first adhesive I and the second adhesive II at the same time. Adhesive gun 340 applied the first and second adhesives I and II at the same time. At this time, each worker fixes the end of the different partition 240. As a result, the divided objects 240 can be pasted separately, and since they will not interfere with each other's work, the pasting of the divided objects 240 is simple and quick. Of course, according to other embodiments of the present invention, instead of manual work, the adhesive is moved to the vicinity of the inner wall of the first side wall plate 220 by an automated device, and then the adhesive is sprayed to automatically apply and paste on the inner wall of the first side wall plate 220. Agent.

[0078] Preferably, in order to maintain the mutual temperature, the first and second adhesives I and II of the inner wall of the first side wall 220 are mutually cross-coated.

[0079] The mobile spray gun 340 can be changed variously, and the adhesive can be distributed on the sticking surface in various ways. One of the most important features of the present invention is that the first adhesive agent I of the hot-melt adhesive and the second adhesive agent II of the solvent/emulsion type are applied to the application site at the same time, so as to provide the initial It sticks well and can maintain a strong sticking strength for a long time.