Paper binder manufacturing method and paper binder system

Abstract

The present invention particularly relates to a method for manufacturing a paper binder, and the present invention is configured to include the steps of: providing laminated roll paper in which one side of an inner roll paper and one side of an outer roll paper are each coated with a high-heat reaction bonding material, and the other uncoated sides of the inner roll paper and the outer roll paper are positioned facing each other, and the laminated roll paper is laminated to each other at low heat via a low-heat reaction molding material; slitting the laminated roll paper to a desired width, and cutting the slit roll paper to have the shape of a comb tooth portion and a comb tooth connecting portion to form a flat comb tooth-shaped paper binder; low-heat heating on a heating plate or heating zone so that only the low-heat reaction molding material in the flat comb tooth-shaped paper binder is melted; and transporting the flat comb-shaped paper binder in which only the low-heat reaction molding material has been low-heat heated by a transport means to a molding device, and molding the flat comb tooth-shaped paper binder by the molding device into a cylindrical shape so that the tips of the comb tooth portions of the flat comb tooth-shaped paper binder face each other corresponding to the comb tooth connecting portions.

Description

[Technical Field]

[0001] The present invention relates to a paper binder for binding notebooks, sketchbooks, calendars, and planners through punched holes. - Manufacturing method and Paper Binder System Regarding. [Background technology]

[0002] Generally, there are two methods for binding or bookbinding using holes, such as conventional notebooks, sketchbooks, calendars, and planners: coil ring and twin ring. These methods use wire or plastic (PVC, PET) rings. The coil ring binding method involves inserting one row of coil rings continuously into each hole to form a diagonal binding, while the twin ring binding method involves inserting two rows of rings into each hole and interlocking them to form an O-ring.

[0003] In recent years, in view of the demand and trend for eco-friendliness of products, as well as the problem of separate collection at the time of disposal, conventional products using wire or plastic rings as described above have had the inconvenience of having to separate the wire or plastic from the paper for recycling when disposed of, and also have the problem that the wire or plastic rings themselves are not environmentally friendly.

[0004] Furthermore, in the case of office supplies and stationery products such as notebooks, sketchbooks, calendars, and planners that are bound with wire or plastic rings, the wire or plastic tips protruding from both ends of the coil rings of the products are sharp, which has led to the problem of accidents such as pricking hands when using the products.

[0005] The prior art (Korean Patent No. 10-1124063) discloses a product that can replace wire with paper in twin-ring binding. However, the prior art paper product used in twin-ring binding has various fundamental problems.

[0006] The twin ring manufacturing process and problems disclosed in the prior art (Korean Patent No. 10-1124063) will now be described.

[0007] (1) Liquid adhesive (heat sealant) Conventional technology involves dissolving a polymeric substance in an organic solvent to be used to bond the papers together, and then applying the heat-sealing agent between the papers. However, heat-sealing agents, which are polymeric substances that contain an organic solvent as a solvent, are volatile organic substances that are a major cause of air pollution, are harmful to the human body, and are flammable, making them vulnerable to fires.

[0008] In addition, after applying the liquid adhesive to the surface of the paper, a long period or time of heat drying is required to volatilize the organic solvent, which causes problems such as a complicated process and increased installation costs.

[0009] The liquid heat-sealing agent used in the prior art is not only required in the paper-stacking process for laminating sheets of paper together, but also in the subsequent molding process for heating and molding the heat-sealing agent again, and is also an adhesive required in the bookbinding process for thermally bonding the tips of the comb teeth to the comb tooth connecting parts using the heat-sealing agent exposed at the tips of the comb teeth. In particular, because such heat-sealing agents are in a low-viscosity liquid form, they can easily penetrate the paper during the application process to the paper surface, but they do not form a solid film, limiting their ability to ensure sufficient rigidity. As a result, there is a problem in that they cannot ensure sufficient rigidity as a binder, even when used with paper that is 1 mm or thicker.

[0010] (2) Elimination of half-cutting and rewinding processes In the conventional technology, the tips of the comb teeth are cut to expose the heat-sealing agent at the tips of the comb teeth. As described above, the conventional technology requires a tip-cutting process for the comb teeth to expose the heat-sealing agent at the tips of the comb teeth, which further requires a drawing device for drawing out the comb-shaped stacked paper wrapped around the bobbin, a half-cutting device for cutting the tips of the comb teeth of the stacked paper, and a winding device for rewinding the stacked paper drawn from the half-cutting device onto the bobbin.

[0011] These complicated processes increase unnecessary manufacturing costs, and the additional equipment required increases facility and equipment costs, which also increases costs.

[0012] (3) Complex process and equipment in which the molding process is divided into two parts and transported The molding device in the molding process of conventional technology is composed of a table-type base frame, a first molding unit and a second molding unit equipped with a press mechanism, and multiple conveying units that transport stacked paper in front of and behind both molding units, with the conveying units, first molding unit, conveying unit, second molding unit, and conveying unit arranged in that order on the top surface of the base frame.

[0013] In the conventional technology, the molding process is carried out separately in the first molding section and the second molding section, which causes a problem of unnecessary increase in the number of conveying steps and devices.

[0014] In other words, the complicated molding process of molding the product in two parts reduces productivity, requires unnecessary machinery and equipment, and increases manufacturing costs.

[0015] (4) Heating function for multiple jig plates during the molding process Because the molding film is not sufficiently formed in the paper-interleaving process, the molding means must heat the jig plate in the molding process. As a result, after molding, the product must be separated and released from the jig plate and then undergo a cooling process. After separation, the molded shape tends to return to its original shape during cooling, which reduces the accuracy of the desired molded shape and makes it difficult to ensure sufficient rigidity.

[0016] In the molding process of paper binder, which consists of molding cylindrical curved parts and folding parts, both the first molding section and the second molding section require multiple jig plates with heating functions, and each also requires a cooling device.

[0017] Therefore, the temperature rise at the jig plate during molding unnecessarily lengthens the working time, and since cooling is required after molding, the manufacturing process takes a lot of time, reducing productivity and making accurate molding difficult.

[0018] (5) The necessity of U-shaped protective paper The binders of the prior art are configured so that the heat sealant is exposed at the tips of the comb teeth, which creates a risk of the binder itself being accidentally attached due to the exposed heat sealant on the top and bottom surfaces when the binder formed in the molding process is wound onto a bobbin. Therefore, the prior art requires a process in which a C-shaped binder is surrounded by a U-shaped piece of paper and then wound. These additional paper materials, manufacturing processes, and winding devices complicate the manufacturing process and equipment, reducing productivity and increasing manufacturing costs. Summary of the Invention [Problem to be solved by the invention]

[0019] The present invention has been made to solve the above problems, and its purpose is to improve productivity by not using a liquid adhesive, thereby eliminating the need for a long drying period for the evaporation of organic solvents, and to eliminate the need for complicated processes such as half-cutting and rewinding required to expose the heat sealant at the tips of the comb teeth, as in conventional technology. Furthermore, the binder itself can be wound up as is without the need to separately manufacture and use U-shaped protective paper required to prevent the heat sealant exposed at the tips of the comb teeth from sticking or becoming distorted, as in conventional technology, thereby simplifying the production process and reducing paper waste.

[0020] The object of the present invention is to eliminate the need for the tip cutting process in conventional technology, so that the thickness of the tip of the comb tooth portion and the comb tooth connecting portion are the same, and as a result, the expanded shape of the tip of the comb tooth portion can be easily wound onto a bobbin without problems such as expansion or contraction, and in particular, to facilitate the insertion work in the bookbinding process by maintaining the shape as it is during the distribution process.

[0021] The object of the present invention is to shorten the production time and enable accurate bending by using a heating plate (or heating zone) to heat the comb tooth portion and the comb tooth connecting portion in advance before the molding process, and then to mold them sequentially at a fixed position without re-transporting them, while simultaneously cooling them.

[0022] The object of the present invention is to join the tips of the comb tooth portions and the comb tooth connecting portions, which are flared outward so as to protrude from each other, together by forming a straight section (or a long groove in the middle of the straight section) on the spine portion opposite the tips of the comb tooth portions and the comb tooth connecting portion, so that the two "turning points" (or the long groove in the middle of the straight section) at both ends of the straight section are used as points of force to smoothly form a perfect circle using the elasticity of the paper ring binder, and in particular, to maintain the perfect circle and eliminate deformation due to considerable durability even after binding. [Means for solving the problem]

[0023] One embodiment of the present invention for achieving the above object is a method for manufacturing a paper binder, comprising the steps of: providing laminated roll paper in which one side of an inner roll paper and one side of an outer roll paper are each coated with a high-heat reactive bonding material, and the other uncoated sides of the inner roll paper and the outer roll paper are positioned facing each other, and laminated together at low heat via a low-heat reactive molding material; slitting the laminated roll paper to a desired width and cutting the slit roll paper to have the shapes of comb teeth and comb tooth connecting parts, thereby forming a flat comb-tooth shaped paper binder; low-heat heating on a heating plate or heating zone so that only the low-heat reactive molding material in the flat comb-tooth shaped paper binder is melted; and conveying the low-heat reactive molding material by a conveying means. and transporting the flat comb-shaped paper binder whose temperature has been raised by low heat to a molding device, and molding the flat comb-shaped paper binder by the molding device into a cylindrical shape so that the tips of the comb tooth portions of the flat comb-tooth shaped paper binder face each other in correspondence with the comb tooth connecting portions, wherein the high-heat reaction bonding material has a melting point at least 10°C higher than that of the low-heat reaction molding material and is not affected during the laminating process by low heat and the cylindrical molding process by low-heat temperature rise, and the low-heat reaction molding material has the function of laminating the inner roll paper and the outer roll paper by low-heat temperature rise and the function of molding the flat comb-tooth shaped paper binder into a cylindrical shape, while the high-heat reaction bonding material has the function of joining the tips of the comb tooth portions of the flat comb-tooth shaped paper binder to the comb tooth connecting portions by high-heat temperature rise when it is later inserted into a punched paper product and bound.

[0024] A paper binder system according to another embodiment of the present invention includes a laminated roll paper generating unit in which one side of an inner roll paper and one side of an outer roll paper are each coated with a high-temperature reactive bonding material, and the other uncoated sides of the inner roll paper and the outer roll paper are positioned facing each other and laminated together at low heat via a low-temperature reactive molding material; a low-heat pressure roller unit in which a portion of the low-temperature reactive molding material is melted by low-heat heating and pressure, and the inner roll paper and the outer roll paper are laminated together; a slitting unit that slits the laminated roll paper to a desired width; a cutting unit that cuts the slit roll paper to have the shapes of comb teeth and comb tooth connecting parts, thereby forming a flat comb-shaped paper binder; and a heating plate or heating zone that melts only the low-temperature reactive molding material in the flat comb-shaped paper binder. the low-heat reaction molding material has a melting point at least 10°C higher than that of the low-heat reaction molding material and is not affected by the laminating process by low heat and the cylindrical molding process by low-heat, and the low-heat reaction molding material has the function of laminating the inner roll paper and the outer roll paper by low-heat heating and the function of molding the flat comb-tooth shaped paper binder into a cylindrical shape, while the high-heat reaction bonding material has the function of joining the tips of the comb-tooth portions of the flat comb-tooth shaped paper binder to the comb-tooth connecting portions by high-heat heating when it is inserted into a punched paper product later and bound.

[0025] According to another embodiment of the present invention, there is provided a paper binder produced by the above-described method. [Effects of the Invention]

[0026] The present invention has the following effects.

[0027] First, by not using a liquid adhesive, there is no need for a long drying period for the evaporation of the organic solvent, improving productivity. Also, there is no need for complicated processes such as half-cutting and rewinding, which are required in conventional technology to expose the heat seal agent at the tips of the comb teeth, thereby improving productivity and reducing manufacturing costs. Furthermore, there is no need to separately manufacture and use U-shaped protective paper, which is required in conventional technology to prevent the heat seal agent exposed at the tips of the comb teeth from sticking or becoming distorted. This allows the binder itself to be wound up, simplifying the production process and reducing paper waste.

[0028] Second, since the tip cutting process required in the prior art is not required, the thickness of the tip of the comb tooth portion and the comb tooth connecting portion are the same, and as a result, the expanded shape of the tip of the comb tooth portion can be easily wound onto a bobbin without problems such as expansion or contraction.In particular, the shape is maintained even during distribution, making it easy to insert the paper during the bookbinding process.

[0029] Third, before the molding process, the temperature is raised in advance by a heating plate (or heating zone), and the comb tooth portion and comb tooth connecting portion are molded sequentially at a fixed position without being re-transported, and are cooled at the same time, thereby shortening production time and enabling accurate bending.

[0030] Fourth, when the tips of the comb tooth portions and the comb tooth connecting portions, which are flared outward so as to protrude from each other, are joined together, a straight section (or a long groove in the middle of the straight line) is further formed on the spine portion on the opposite side of the tips of the comb tooth portions and the comb tooth connecting portion, and the two ``turning points'' (or the long groove in the middle of the straight line) at both ends of the straight section are used as force points, and the elasticity of the paper ring binder allows the book to be smoothly made into a perfect circle, and in particular, its considerable durability means that it maintains its perfect circle and does not deform even after binding. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 2 is a schematic diagram showing the interleaving, cooling and slitting steps according to the present invention. [Figure 2]1A and 1B are diagrams showing an exemplary cross section of a roll of paper wound after the interleaving, cooling and slitting processes according to the present invention. [Figure 3] 10 is a diagram showing a flat comb-shaped paper binder made by symmetrically cutting a slit roll of paper so as to have the shapes of comb-tooth portions and comb-tooth connecting portions. FIG. [Figure 4] FIG. 2 is a schematic diagram showing the heating and molding process according to the present invention. [Figure 5] 3A to 3C are schematic diagrams sequentially showing molding steps performed by the molding device according to the present invention. [Figure 6(a)] 1A and 1B are a perspective view and a cross-sectional view of a paper binder molded into a cylindrical shape by a molding device according to one embodiment of the present invention. [Figure 6(b)] 1A and 1B are a perspective view and a cross-sectional view of a paper binder molded into a cylindrical shape by a molding device according to one embodiment of the present invention. [Figure 7(a)] 10A and 10B are a perspective view and a cross-sectional view of a paper binder molded into a cylindrical shape by a molding device according to another embodiment of the present invention. [Figure 7(b)] 10A and 10B are a perspective view and a cross-sectional view of a paper binder molded into a cylindrical shape by a molding device according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0032] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0033] FIG. 1 is a schematic diagram illustrating the laminating, cooling, and slitting process according to the present invention. Referring to FIG. 1, an inner roll of paper 10, a low-heat reaction molding material film 30a, an intermediate roll of paper 40, a low-heat reaction molding material film 30b, and an outer roll of paper 20 are sequentially wound on rolls arranged in a drawing device 1 and continuously drawn out and supplied. One side of the inner roll of paper 10 and the outer roll of paper 20 is coated with a high-heat reaction bonding material 10a, 20a, respectively. The inner roll of paper 10, the low-heat reaction molding material film 30a, the intermediate roll of paper 40, the low-heat reaction molding material film 30b, and the outer roll of paper 20 pass through a low-heat pressure roller 2, where the low-heat reaction bonding materials 30a, 30b melt to form a laminated roll of paper. In this case, the inner roll of paper 10 and the outer roll of paper 20 are laminated so that the uncoated sides of the inner roll of paper 10 and the outer roll of paper 20 face each other. Therefore, both outer surfaces of the laminated roll paper are kept coated with high-heat reactive bonding materials 10a, 20a. The laminated roll paper is cooled by cooling device 3, then slit to a predetermined width by known slitting device 4, and then wound up onto roll 5. In particular, low-heat pressure roller 2 consists of a pair of upper and lower rollers, and is heated to a temperature that only melts low-heat reactive molding materials 30a, 30b, so that the high-heat reactive bonding materials 10a, 20a coated on both outer surfaces of the laminated roll paper are not affected or damaged in any way.

[0034] Preferably, the high-heat reaction bonding materials 10a, 20a have a melting point at least 10°C higher than that of the low-heat reaction molding materials 30a, 30b, and are not affected during the laminating process by the low-heat pressure roller 2 and the subsequent cylindrical molding process by low-heat heating. More preferably, the high-heat reaction bonding materials have a melting point at least 30°C higher than that of the low-heat reaction molding materials.

[0035] The low-heat reaction molding materials 30a and 30b are preferably biodegradable films, and may be polyethylene films, soft PVC films, or heat-liquefied solid films. The thickness of the coating or film of the low-heat reaction molding material is 50 to 200 μm.

[0036] Most preferably, the low-heat reactive molding material is made solely of biodegradable materials that are 100% naturally decomposable, such as polylactic acid (PLA), cellulose, and biopolymer (PBAT). In this case, when landfilled, primary decomposition occurs under certain conditions of sunlight, temperature, and humidity (composting conditions, such as a temperature of 58°C and humidity of 70%), followed by secondary decomposition by microorganisms (bacteria, fungi, etc.), resulting in 100% natural decomposition into water and carbon dioxide within 180 days. Therefore, it prevents environmental pollution and ecosystem destruction, is classified as general waste (not for recycling), and can be easily disposed of. It is also suitable for composting soil after being landfilled and fully decomposed. It does not emit any carcinogens when incinerated, and biodegradable vinyl made from biodegradable raw materials (EL724) can also be recycled.

[0037] Such low-heat reactive molding material has the function of joining the inner roll paper and the outer roll paper by low heat temperature rise (paper joining function), and the function of molding the subsequent flat comb-tooth shaped paper binder into a cylindrical shape (molding function).

[0038] The high-heat reaction bonding materials 10a and 20a are preferably environmentally friendly water-soluble coating materials with a higher melting point than the low-heat reaction molding material, and are environmentally friendly materials with water resistance, oil resistance, and sealing properties. The thickness of the coating layer of the high-heat reaction bonding material is 5 to 20 μm.

[0039] When the high-temperature reactive bonding material is later inserted into a punched paper product and bound, it has a water-resistant and oil-resistant function (coating function), as well as a function (bonding function) of bonding the tips of the comb tooth portion of the flat comb-tooth-shaped paper binder to the comb tooth connecting portion by heating to high heat.

[0040] As mentioned above, the high-heat reaction bonding material must have a melting point at least 10°C (preferably 30°C) higher than that of the low-heat reaction molding material. This is to ensure that the high-heat reaction bonding material, which performs coating and bonding functions during binding or bookbinding, is not affected in any way by the aforementioned low-heat interleaving and low-heat temperature-rise cylindrical molding. In particular, it should be noted that high heat and low heat are relative concepts.

[0041] (A) Process 300°C → High heat 200°C → High heat (B) Process 200℃ → Low heat 150℃ → Low heat For example, polyethylene that melts at 200°C can become a low-heat reaction molding material in process (A) and a high-heat reaction joining material in process (B).

[0042] That is, the same material can be a low-heat reaction molding material or a high-heat reaction joining material depending on the process.

[0043] Since the low-heat reaction molding material reacts at a relatively low temperature compared to the high-heat reaction bonding material, it does not affect the high-heat reaction bonding material that has been previously coated, even when it goes through the laminating and molding processes that are performed at low temperatures. Therefore, the high-heat reaction bonding material must have a melting point that is at least 10°C (preferably 30°C) higher than that of the low-heat reaction molding material.

[0044] Preferably, the low-heat reactive molding material may be a biodegradable film that reacts at 100 to 220 degrees Celsius, such as a polyethylene film, a PVC film, or a hot melt, with an environmentally friendly biodegradable film being most preferred.

[0045] The high-temperature reaction binder may be a water-dispersible thermosetting acrylic copolymer that reacts at 300 to 400 degrees Celsius, a thermoplastic material such as polyethylene that reacts at temperatures of 160 to 220 degrees Celsius, or a hot melt, but an environmentally friendly water-dispersible thermosetting acrylic copolymer is most preferred.

[0046] Figure 2 shows an example cross section of rolled paper after the laminating, cooling, and slitting processes according to the present invention. Figure 2(a) shows a cross section of the inner rolled paper 10 coated with a high-temperature reaction binder 10a on its outer surface, a low-heat reaction molding material film 30a, an intermediate rolled paper 40, a low-heat reaction molding material film 30b, and an outer rolled paper 20 coated with a high-temperature reaction bonding material 20a on its outer surface, laminated in sequence according to the process shown in Figure 1. Figure 2(b) shows a cross section of the inner rolled paper 10 coated with a high-temperature reaction binder 10a on its outer surface, a low-heat reaction molding material film 30, and an outer rolled paper 20 coated with a high-temperature reaction bonding material 20a on its outer surface, laminated in sequence when the intermediate rolled paper in Figure 1 is not required. In particular, when manufacturing large-diameter paper binders, further rigidity reinforcement is required. In this case, as shown in Figure 2(a), an intermediate roll of letter paper 40 can be further laminated between the inner roll of paper 10 and the outer roll of paper 20, with low-heat reactive molding material films 30a, 30b further laminated between each of these sheets. Therefore, depending on whether or not and how many intermediate rolls of paper 40 are added between the inner roll of paper 10 and the outer roll of paper 20, a binder can be configured with three, five, or seven layers. For reference, the cross section shown in Figure 2(a) shows a binder configured with five layers, and the cross section shown in Figure 2(b) shows a binder configured with three layers.

[0047] Fig. 3 shows a flat comb-tooth shaped paper binder 50 made by symmetrically cutting a slit roll of paper so as to have the shapes of comb-tooth portions 52 and comb-tooth connecting portions 54. Referring to Fig. 3, the slit roll of paper is cut to have the shapes of comb-tooth portions 52 and comb-tooth connecting portions 54 to form a flat comb-tooth shaped paper binder 50. This cutting process is performed by attaching a mold to a press mechanism, and as shown in Fig. 3, the comb-tooth portions and comb-tooth connecting portions are cut symmetrically on both the left and right sides.

[0048] Preferably, the mold used in the cutting process is a composite die mold, and cutting is performed to the left and right as the upper frame and the lower frame intersect, and the comb teeth portion and comb tooth connection portion on one side fitted to the lower frame are pulled upward and transported by a slide pad attached within the lower frame. The slide pad is configured to move up and down by a spring within the lower frame. When the upper frame presses the lower frame with strong pressure to cut the comb teeth portion and comb tooth connection portion symmetrically, the spring within the lower frame is pushed downward by the upper frame, and then, when the upper frame rises upward, the elastic action of the spring within the lower frame causes the comb teeth portion and comb tooth connection portion on one side fitted to the lower frame to be pulled upward and transported.

[0049] 4 is a schematic diagram showing the heating and molding process according to the present invention. Referring to FIG. 4, cut, flat, comb-shaped paper binders 50 are unwound from a wound roll 6 and fed to a heating plate or heating zone 7. That is, the heating plate or heating zone 7 is configured to sufficiently heat the comb teeth and comb tooth connection portions of the flat, comb-shaped paper binders just before the molding process, particularly to melt only the low-heat reactive molding material in those areas, at low heat. For example, the heating plate or heating zone 7 may be provided in the form of a heating plate heated by a heater or a heating zone controlled by hot air.

[0050] The flat, comb-tooth-shaped paper binder heated to a low temperature is sent to a molding device 8 by a conveying means, and the molding device molds the flat, comb-tooth-shaped paper binder into a cylindrical shape so that the tips of the comb-tooth portions of the paper binder face each other in correspondence with the comb-tooth connecting portions, and then the paper binder is wound up again (9).

[0051] Fig. 5 is a schematic diagram showing the sequence of molding steps performed by the molding device according to the present invention. Referring to Fig. 5, the molding device 8 of the present invention comprises an upper die 8a that moves downward to contact the upper part of the inner die 8', a side die 8b that moves laterally to contact the side of the inner die 8', and a lower die 8c that moves upward to contact the lower part of the inner die 8'. The upper die, side die, and lower die move sequentially without being re-transported during the molding step to mold the flat, comb-like paper binder placed on the inner die into a cylindrical shape.

[0052] Preferably, a molding device according to another aspect of the present invention comprises an upper mold that operates downward to contact the upper part of the inner mold and a lower mold that operates upward to contact the lower part of the inner mold, and the upper and lower molds operate sequentially without being re-transported during the molding process to mold a flat, comb-shaped paper binder placed on the inner mold into a cylindrical shape. In this case, the lower mold comprises a first lower mold and a second lower mold that operate independently, and the first lower mold and the second lower mold are configured to operate independently in sequence.

[0053] Most preferably, the inner mold is further provided with a cooling means for cooling at least one of the upper mold and the lower mold, and can be cooled simultaneously with molding by the molding device without the need for a separate re-transport. For example, room temperature cooling is possible in winter, and at least one cooling device capable of flowing water or air within each mold in summer can be provided, or cooling can be performed directly outside the mold with blown air or cooled air.

[0054] The molding process using the molding device according to the present invention will be described below with reference to FIG.

[0055] First, as shown in FIG. 5(a), a flat, comb-shaped paper binder is placed on the inner mold 8' of the molding device. Next, as shown in FIG. 5(b), the upper mold 8a moves downward toward the lower inner mold 8', so that the support rod 8, which is attached so as to protrude partially from the lower end of the upper mold 8a, presses and supports the flat, comb-shaped paper binder placed on the inner mold 8'. Next, as shown in FIG. 5(c), the upper mold 8a is moved further downward, so that it abuts against the upper part of the inner mold 8' and applies pressure, thereby molding the upper surface of the placed comb-shaped paper binder into a semicircular shape. In this case, as shown in FIG. 5(d), the side mold 8b is operated laterally while the inner mold 8' is maintained as it is without a separate re-transportation process, so that it abuts against the front side surface of the inner mold 8' and applies pressure, molding the lower surface of the placed comb-shaped paper binder into a semicircular shape. Next, as shown in Fig. 5(e), similarly, without a separate re-transportation process, the lower mold 8c moves upward to abut against the lower part of the inner mold 8' and apply pressure, molding the lower surface of the previously placed comb-tooth-shaped paper binder into a semicircular shape. Next, as shown in Fig. 5(f), the upper and lower molds are released from the inner mold, and finally, a flat comb-tooth-shaped paper binder can be molded into a cylindrical shape.

[0056] In particular, as shown in Figures 5(b) to 5(e), a series of molding processes are carried out while the support rod 8x applies pressure to and supports the flat, comb-tooth-shaped paper binder placed on the inner mold 8', so there is no need to configure the molding process in two stages as in conventional technology, and as a result, the molding can be carried out sequentially without the need for re-transportation during the molding process, thereby significantly improving productivity.

[0057] Preferably, instead of the side molds, the lower mold can be configured with a first lower mold and a second lower mold that operate independently, and in this case, the first lower mold and the second lower mold can be configured to operate upward sequentially.

[0058] Figures 6(a) and 6(b) show a perspective view and a cross-sectional view of a paper binder molded into a cylindrical shape by a molding device according to one embodiment of the present invention, and Figures 7(a) and 7(b) show a perspective view and a cross-sectional view of a paper binder molded into a cylindrical shape by a molding device according to another embodiment of the present invention.

[0059] 6(a) and 6(b), when the tips of the tooth portions are formed into cylindrical shapes facing each other in correspondence with the tooth connection portions by the molding device, a straight (flat) portion 56 may be further molded on the spine portion opposite the tooth portion tips 52a and tooth connection portions 54, which are flared outward so as to protrude from each other. This is because, when the tooth portion tips and tooth connection portions, which are flared outward so as to protrude from each other, are joined together in the subsequent binding step, the straight portions formed on the spine portion opposite the tooth portion tips and tooth connection portions are smoothly turned into perfect circles by the elasticity of the paper ring binder with the "fold points X" at both ends as force points, and in particular, the perfect circles can be maintained without any significant deformation due to their considerable durability even after binding.

[0060] 7(a) and 7(b), a long groove 58 recessed inward toward the flared portion may be formed in the center of the straight portion. When the tips and connecting portions of the comb teeth, which flare outward and protrude from each other, are joined together in the subsequent binding process, the long groove formed in the center of the straight portion serves as a force point to smoothly form a perfect circle with the elasticity of the paper ring binder. In particular, the long groove maintains its perfect circle without significant deformation even after binding due to its considerable durability. Furthermore, when the roll paper, in which the inner and outer roll paper are laminated, is molded into a cylindrical shape, the long groove prevents deformation of the laminated roll paper (for example, misalignment between the outer and inner roll paper) due to the difference in overall circumference between the inner and outer diameters of the inner roll paper and the outer roll paper.

[0061] Although the present invention has been described in detail with reference to the drawings, the present invention is not limited to these specific structures. Those skilled in the art may make various modifications and alterations to the present invention without departing from the technical spirit and scope of the present invention as defined in the following claims. However, it should be made clear in advance that such simple design changes in materials or modified structures are all clearly within the scope of the present invention.

Claims

1. In a method for manufacturing a paper binder, providing laminated roll paper in which one side of the inner roll paper and one side of the outer roll paper are coated with a high-heat reactive bonding material, and the other uncoated sides of the inner roll paper and the outer roll paper are positioned opposite each other, and laminated together at low heat via a low-heat reactive molding material therebetween; a step of slitting the laminated roll paper to a desired width and cutting the slit roll paper to have the shapes of the comb tooth portion and the comb tooth connecting portion, thereby forming a flat comb tooth-shaped paper binder; A step of low-temperature heating on a heating plate or heating zone so that only the low-heat reaction molding material in the flat comb-shaped paper binder is melted; A step of conveying the flat comb-shaped paper binder in which only the low-heat reaction molding material has been heated by low heat to a molding device by a conveying means, and molding the flat comb-shaped paper binder into a cylindrical shape by the molding device so that tips of the comb tooth portions of the flat comb-shaped paper binder face each other in correspondence with the comb tooth connecting portions, The high-heat reaction bonding material has a melting point at least 10°C higher than that of the low-heat reaction molding material, and is therefore not affected by the laminating process using low heat and the cylindrical molding process using low heat rise, and the low-heat reaction molding material has the function of laminating the inner roll paper and the outer roll paper using low heat rise and the function of molding the flat comb-tooth shaped paper binder into a cylindrical shape, while the high-heat reaction bonding material has the function of joining the tips of the comb tooth portions of the flat comb-tooth shaped paper binder to the comb tooth connecting portions using high heat rise when it is later inserted into a punched paper product and bound. A method for manufacturing a paper binder, characterized in that

2. 2. The method for producing a paper binder according to claim 1, wherein the inner roll paper and the outer roll paper are laminated together by melting the low-heat reaction molding material while passing through a low-heat pressure roller.

3. The method for producing a paper binder according to claim 1, wherein the high-heat reaction bonding material has a melting point at least 30°C higher than that of the low-heat reaction molding material.

4. 2. The method for manufacturing a paper binder according to claim 1, wherein the molding device comprises an upper mold that operates downward to abut against the upper part of the inner mold, and a lower mold that operates upward to abut against the lower part of the inner mold, and the upper and lower molds operate sequentially to mold a flat, comb-tooth-shaped paper binder placed on the inner mold into a cylindrical shape.

5. 5. The method for manufacturing a paper binder according to claim 4, wherein the lower mold comprises a first lower mold and a second lower mold that operate independently, and the first lower mold and the second lower mold are configured to operate independently in sequence.

6. 2. The method for manufacturing a paper binder according to claim 1, wherein the molding device comprises an upper mold that operates downward to abut against the upper part of the inner mold, a side mold that operates horizontally to abut against the side of the inner mold, and a lower mold that operates upward to abut against the lower part of the inner mold, and the upper mold, side mold, and lower mold operate sequentially to mold a flat, comb-tooth-shaped paper binder placed on the inner mold into a cylindrical shape.

7. 5. The method for manufacturing a paper binder according to claim 4, wherein the inner mold further comprises a cooling means for cooling at least one of the upper mold and the lower mold inside or outside the mold, and cooling is performed simultaneously with molding by the molding device.

8. A method for manufacturing a paper binder as described in claim 4 or 6, wherein when the upper mold moves downward toward the inner mold, a support rod attached so as to protrude partially from the lower end of the upper mold applies pressure to and supports a flat, comb-tooth-shaped paper binder placed on the inner mold.

9. 2. The method for producing a paper binder according to claim 1, wherein an additional intermediate roll of paper and a low-heat reaction molding material on both sides of the intermediate roll of paper can be sequentially laminated between the outer roll of paper and the inner roll of paper.

10. A method for manufacturing a paper binder as described in claim 1, wherein when the tips of the comb tooth portions are molded into a cylindrical shape so that they face each other in correspondence with the comb tooth connecting portion by the molding device, straight portions are further molded into the tips of the comb tooth portions that expand to protrude and face each other, and into the spine portion on the opposite side of the comb tooth connecting portion.

11. The method for manufacturing a paper binder according to claim 10, wherein a long groove recessed inward toward the central widening portion of the straight section is further molded.

12. In paper binder systems, a laminated roll paper generating section in which one side of the inner roll paper and one side of the outer roll paper are coated with a high-heat reactive bonding material, and the other uncoated sides of the inner roll paper and the outer roll paper are positioned facing each other, and are laminated together at low heat via a low-heat reactive molding material; a low-heat pressure roller unit that melts a portion of the low-heat reaction molding material by low-heat temperature rise and pressure to laminate the inner roll paper and the outer roll paper; a slitting section that slits the laminated roll paper to a desired width; a cutting unit that cuts the slit roll paper into a shape having a comb tooth portion and a comb tooth connecting portion, thereby forming a flat comb tooth-shaped paper binder; A low-heat heating section that heats the temperature of the heating plate or heating zone so that only the low-heat reaction molding material in the flat comb-shaped paper binder is melted; a conveying section that conveys the flat comb-shaped paper binder in which only the low-heat reaction molding material has been heated by low heat to a molding device; a molding part that molds the flat comb-tooth-shaped paper binder into a cylindrical shape so that tips of the comb-tooth parts of the paper binder face each other in correspondence with the comb-tooth connecting part, The high-heat reaction bonding material has a melting point at least 10°C higher than that of the low-heat reaction molding material, and is therefore not affected by the laminating process using low heat and the cylindrical molding process using low heat rise, and the low-heat reaction molding material has the function of laminating the inner roll paper and the outer roll paper using low heat rise and the function of molding the flat comb-tooth-shaped paper binder into a cylindrical shape, while the high-heat reaction bonding material has the function of joining the tips of the comb tooth portions of the flat comb-tooth-shaped paper binder to the comb tooth connecting portions using high heat rise when it is later inserted into a punched paper product and bound. This is a paper binder system characterized by the above.

13. The flat comb-shaped paper binder is molded into a tip and a comb-tooth connecting portion of a cylindrical comb-tooth portion that are expanded by the molding portion so as to protrude from each other and face each other, 13. The paper binder system of claim 12, further comprising a binding section that inserts a punched paper product into the tip of the comb tooth section and presses the tip of the comb tooth section so that it abuts against the comb tooth connecting section, thereby bonding the paper products together without a separate adhesive by the high-temperature reactive bonding material melted by high heat temperature.

14. The paper binder system according to claim 12, wherein the high-heat reaction bonding material has a melting point at least 30°C higher than that of the low-heat reaction molding material.

15. The paper binder system of claim 12, wherein the molding section comprises an upper mold that operates downward to abut against the upper part of the inner mold, and a lower mold that operates upward to abut against the lower part of the inner mold, and the upper and lower molds operate sequentially to mold a flat, comb-tooth-shaped paper binder placed on the inner mold into a cylindrical shape.

16. 16. The paper binder system of claim 15, wherein the lower mold comprises a first lower mold and a second lower mold that operate independently, and the first lower mold and the second lower mold are configured to operate independently in sequence.

17. The paper binder system of claim 12, wherein the molding section comprises an upper mold that operates downward to abut against the upper part of the inner mold, a side mold that operates horizontally to abut against the side of the inner mold, and a lower mold that operates upward to abut against the lower part of the inner mold, and the upper mold, side mold, and lower mold operate sequentially to mold a flat, comb-tooth-shaped paper binder placed on the inner mold into a cylindrical shape.

18. The paper binder system according to claim 15, wherein the inner mold further comprises a cooling means for cooling at least one of the upper mold and the lower mold inside or outside the mold, and cooling is performed simultaneously with molding by the molding device.

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