Paper binder, its manufacturing method and manufacturing device

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 items such as notebooks, sketchbooks, calendars, and planners via holes punched therein, and to a method and apparatus for manufacturing the same. [Background technology]

[0002] Generally, there are two types of binding methods for binding or binding books through holes, such as conventional notebooks, sketchbooks, calendars, and planners, which are coil ring and twin ring, and wire or plastic (PVC, PET) rings are used. The coil ring binding method is a method in which one row of coil rings is continuously inserted into each hole to bind in a diagonal line, and the twin ring binding method is a method in which two rows of rings are inserted into each hole and are meshed with each other to bind in the shape of an O-ring.

[0003] In recent years, in view of the demand and trend for making products eco-friendly, as well as the problem of separate collection at the time of disposal, the above-mentioned conventional products using wire or plastic rings have 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 ring itself is not environmentally friendly.

[0004] Furthermore, in the case of office supplies and stationery products such as notebooks, sketchbooks, calendars, and planners bound with wire or plastic rings, there has been a problem in that the wire or plastic tips protruding from both ends of the coil rings of the products are sharp, which often causes 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 manufacturing process and problems of the twin ring disclosed in the prior art (Korean Patent No. 10-1124063) will be described below.

[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 sealant between the papers. However, heat sealants, which are polymeric substances that contain an organic solvent as a solvent, are volatile organic substances and therefore a major cause of air pollution, are harmful to the human body, and are flammable, making them vulnerable to the risk of fire.

[0008] In addition, after the liquid adhesive is applied 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 sealant in the conventional technology is not only necessary in the paper lamination process for laminating the papers together, but also necessary for heating and molding the heat sealant again in the subsequent molding process, and is also an adhesive required for thermally bonding the tips of the comb teeth to the comb tooth connecting parts using the heat sealant exposed at the tips of the comb teeth in the bookbinding process. In particular, since such heat sealant is a low-viscosity liquid, it can easily penetrate into the paper in the application process to the paper surface, but there is a limit to ensuring sufficient rigidity due to insufficient solid film formation, and even if it is manufactured with paper that is 1 mm or thicker, there is a problem that it is not possible to ensure sufficient rigidity as a binder.

[0010] (2) Elimination of half-cut and rewinding processes In the conventional technology, the tip of the comb tooth portion is cut to expose the heat sealant at the tip of the comb tooth portion. As described above, the conventional technology requires a tip cutting process of the comb tooth portion to expose the heat sealant at the tip of the comb tooth portion, and therefore further requires a pull-out device for pulling out the comb-tooth-shaped stacked paper wrapped around the bobbin, a half-cut device for cutting the tip of the comb tooth portion of the stacked paper, and a winding device for winding the stacked paper pulled out from the half-cut device back onto the bobbin.

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

[0012] (3) Complex process and equipment in which the molding process is divided into two parts The molding device in the molding process of the 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 laminated 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 upper 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 fixture plates during the molding process Since the molded film is not sufficiently formed in the lamination 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 cooled. After separation, the molded shape has a tendency to return to its original shape during cooling. As a result, the accuracy of the desired molded shape decreases and sufficient rigidity cannot be secured.

[0016] In the molding process of the paper binder, which consists of molding the cylindrical curved portion and the folded portion, 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 extends 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 binder according to the conventional technology is configured such that the heat sealant is exposed at the tips of the comb teeth, and therefore when the binder molded in the molding process is wound onto a bobbin, there is a risk that the upper and lower surfaces of the binder itself may be erroneously attached by the exposed heat sealant. Therefore, the conventional technology necessarily requires a process of surrounding the C-shaped binder with U-shaped paper and then winding it up. These additional paper materials, additional manufacturing processes, and additional winding devices, etc., cause problems such as the complicated manufacturing process and manufacturing device, lowering 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, eliminating the need for a long drying period or time for the evaporation of organic solvents, eliminating the need for complicated processes such as half-cutting and rewinding processes required in conventional technology to expose the heat sealant at the tips of the comb teeth, and simplifying the production process and reducing paper waste by allowing the binder itself to be wound up as is without the need to separately manufacture and use U-shaped protective paper required in conventional technology to prevent the heat sealant exposed at the tips of the comb teeth from sticking or becoming distorted.

[0020] The object of the present invention is to eliminate the need for the tip cutting process in the 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 spread 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 even during the distribution process.

[0021] The object of the present invention is to shorten the production time and enable accurate bending by configuring the device so that the temperature is raised in advance by a heating plate (or heating zone) before the molding process, and the comb tooth portion and the comb tooth connection portion are molded sequentially at a fixed position without being transported again, and then cooled at the same time.

[0022] The object of the present invention is to, when joining the tips of the comb tooth parts and the comb tooth connecting parts, which spread outward so as to protrude from each other, further form a straight section (or a long groove in the middle of the straight line) in the spine part on the opposite side of the tips of the comb tooth parts and the comb tooth connecting parts, so that the two "turn points" (or the long groove in the middle of the straight line) at both ends of the straight section are used as force points 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 its considerable durability even after binding. [Means for solving the problem]

[0023] One embodiment of the present invention for achieving the above object includes 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 so as to face each other, and the laminated roll paper is laminated to each other 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 shape of a comb tooth portion and a comb tooth connection 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 reactive molding material in the flat comb tooth-shaped paper binder is melted; and low-heat heating of 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 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 not affected during the lamination by low heat and the cylindrical molding 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 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 paper binder to the comb-tooth connecting portions by high-heat temperature rise when it is later inserted into a paper product that has been punched and bound.

[0024] A paper binder system according to another embodiment of the present invention includes a laminated roll paper generating section in which one side of an inner roll paper and 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 so as to face each other and are laminated to each other at low heat via a low-heat reaction molding material; a low-heat pressure roller section in which a part of the low-heat reaction molding material is melted by low-heat heating and pressurization to laminate the inner roll paper and the outer roll paper; a slit section that slits the laminated roll paper to a desired width; a cutting section that cuts the slit roll paper to have the shape of a comb tooth portion and a comb tooth connection portion to form a flat comb tooth-shaped paper binder; and a heating plate or heating zone that heats the inner roll paper so that only the low-heat reaction molding material in the flat comb tooth-shaped paper binder is melted. 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 during the lamination by low heat and the cylindrical molding by low-heat heating, and the low-heat reaction molding material has a function of laminating the inner roll paper and the outer roll paper by low-heat heating and a function of molding the flat comb-tooth-shaped paper binder into a cylindrical shape, while the high-heat reaction bonding material has a function of bonding the chips of the comb-tooth portions of the flat comb-tooth-shaped paper binder to the comb-tooth connecting portions by high-heat heating when the high-heat reaction bonding material is inserted into a paper product that has been punched later and stapled.

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

[0026] The present invention has the following advantages.

[0027] First, by not using a liquid adhesive, a long drying period and time are not required for the evaporation of the organic solvent, improving productivity; and, since complicated processes such as half-cutting and rewinding processes required to expose the heat seal agent at the tip of the comb teeth, as in the conventional technology, are not required, productivity is improved and manufacturing costs are reduced. In addition, since a separate U-shaped protective paper, which is required to prevent the heat seal agent exposed at the tip of the comb teeth from sticking and becoming distorted, as in the conventional technology, does not need to be manufactured and used, the binder itself can be wound up as it is, simplifying the production process and reducing paper waste.

[0028] Second, since the tip cutting process required in the conventional technology 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 the distribution process, making it easy to insert the book in the bookbinding process.

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

[0030] Fourth, when the tips of the comb tooth parts and the comb tooth connecting parts, which spread outward so as to protrude from each other, are joined together, a straight line part (or a long groove in the middle of the straight line) is further formed in the spine part on the opposite side of the tips of the comb tooth parts and the comb tooth connecting parts, so that the two ``turn points'' (or the long groove in the middle of the straight line) at both ends of the straight line are used as force points to smoothly form a perfect circle due to the elasticity of the paper ring binder, and in particular, even after binding, the perfect circle is maintained due to its considerable durability and no deformation occurs. [Brief description of the drawings]

[0031] [Figure 1] FIG. 2 is a schematic diagram showing the interleaving, cooling and slitting steps according to the present invention. [Diagram 2]1A and 1B are diagrams showing an example cross section of a roll of paper wound after lamination, cooling and slitting processes according to the present invention. [Diagram 3] 13 is a diagram showing a flat comb-tooth 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 a heating and molding process according to the present invention. [Diagram 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)] 13A and 13B are an oblique 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)] 13A and 13B are an oblique 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 PREFERRED EMBODIMENTS

[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 showing the lamination, cooling and slitting process according to the present invention. Referring to Fig. 1, the inner roll paper 10, the low heat reaction molding material film 30a, the intermediate roll paper 40, the low heat reaction molding material film 30b, and the outer roll paper 20, each wound on a roll arranged in sequence in the drawing device 1, are continuously drawn out and supplied. In this case, one side of the inner roll paper 10 and the outer roll paper 20 are coated with high heat reaction bonding materials 10a, 20a, respectively. The inner roll paper 10, the low heat reaction molding material film 30a, the intermediate roll paper 40, the low heat reaction molding material film 30b, and the outer roll paper 20 pass through the low heat pressure roller 2 to form a laminated roll paper by melting the low heat reaction molding materials 30a, 30b, and in this case, the inner roll paper 10 and the outer roll paper 20 are laminated so that the other side, which is not coated, of each of them faces each other. Thus, both outer surfaces of the laminated roll paper are kept coated with high heat reaction bonding materials 10a, 20a. The laminated roll paper is cooled by a cooling device 3, slit to a specified width by a known slitting device 4, and then wound up on a roll 5. In particular, the low heat pressure roller 2 is made up of a pair of upper and lower rollers, and is heated to a temperature where only the low heat reaction molding materials 30a, 30b can be melted, so that the high heat reaction 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 lamination by the low heat pressure roller 2 and the subsequent cylindrical molding by low heat heating. More preferably, the high heat reaction bonding material has a melting point at least 30°C higher than that of the low heat reaction molding material.

[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 a biodegradable material made of only biodegradable materials that are 100% naturally decomposed, such as polylactic acid (PLA), cellulose, and biopolymer (PBAT). In this case, when buried, the primary decomposition occurs when sunlight, temperature, humidity, etc. are under certain conditions (composting conditions such as temperature 58°C and humidity 70%), and the secondary decomposition process is carried out by microorganisms (bacteria, mold, etc.), and the material is 100% naturally decomposed into water and carbon dioxide within 180 days. Therefore, it has the effect of preventing environmental pollution and ecosystem destruction, is classified as general waste that is not for recycling, can be easily disposed of, is suitable for composting soil that has been buried and completely decomposed, does not emit any carcinogens when incinerated, and biodegradable vinyl made of biodegradable raw material (EL724) can be recycled.

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

[0038] The high heat reaction bonding material 10a, 20a is preferably an environmentally friendly water-soluble coating material having a higher melting point than the low heat reaction molding material, and is an environmentally friendly material having 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] The high-heat reactive bonding material, when later inserted into a punched paper product and bound, has a water- 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 described 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 exerts a coating function and a bonding function during binding or bookbinding, is not affected in any way during the above-mentioned 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℃ → High heat 200℃ → High heat (B) Process 200℃ → Low heat 150℃ → Low heat For example, polyethylene that melts at 200 degrees Celsius can become a low-heat reaction molding material in process (A) and a high-heat reaction joining material in process (B).

[0042] In other words, the same material can become 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, even if it goes through the lamination and molding process performed at low temperature, it does not have any effect on the high heat reaction bonding material that has been previously coated. Therefore, the high heat reaction bonding material must have a melting point at least 10°C higher (preferably 30°C higher) than the low heat reaction molding material.

[0044] Preferably, the low heat reactive molding material may be a biodegradable film that reacts at 100°C to 220°C, a polyethylene film, a PVC film, a hot melt, etc., with an environmentally friendly biodegradable film being the most preferred.

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

[0046] Fig. 2 is a diagram showing a roll paper wound after the lamination, cooling and slitting process according to the present invention and an exemplary cross section thereof. Fig. 2(a) is a diagram showing a cross section in which "inner roll paper 10 coated with high temperature reaction binder 10a on the outer surface, low heat reaction molding material film 30a, intermediate roll paper 40, low heat reaction molding material film 30b, and outer roll paper 20 coated with high temperature reaction bonding material 20a on the outer surface" are laminated in sequence according to the process shown in Fig. 1. Fig. 2(b) is a diagram showing a cross section in which "inner roll paper 10 coated with high temperature reaction binder 10a on the outer surface, low heat reaction molding material film 30, and outer roll paper 20 coated with high temperature reaction bonding material 20a on the outer surface" are laminated in sequence when the intermediate roll paper in Fig. 1 is not required. In particular, when manufacturing a large-diameter paper binder, further stiffness reinforcement is required. In this case, as shown in Fig. 2(a), an intermediate rolled paper letter paper 40 can be further laminated between the inner rolled paper 10 and the outer rolled paper 20, and low-heat reactive molding material films 30a, 30b can be further laminated between these papers. Therefore, depending on the presence and number of intermediate rolled papers 40 added between the inner rolled paper 10 and the outer rolled paper 20, it can be configured as three, five, or seven layers. For reference, the cross section shown in Fig. 2(a) shows a configuration of five layers, and the cross section shown in Fig. 2(b) shows a configuration of three layers.

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

[0048] Preferably, the mold used in the cutting step is a composite die mold, in which the upper frame and the lower frame cross each other to perform cutting to the left and right, and the comb tooth part and the comb tooth connection part on one side fitted to the lower frame are pulled upward and transported by a slide pad attached in the lower frame. The slide pad is configured to move up and down by a spring in the lower frame. When the upper frame presses the lower frame with strong pressure to cut the comb tooth part and the comb tooth connection part symmetrically on the left and right, the spring in the lower frame is pushed downward by the upper frame, and then, when the upper frame moves upward, the elastic action of the spring in the lower frame causes the comb tooth part and the comb tooth connection part on one side fitted to the lower frame to be pulled upward and transported.

[0049] Fig. 4 is a schematic diagram showing the heating and molding process according to the present invention. Referring to Fig. 4, a cut flat comb-shaped paper binder 50 is pulled out from a wound roll 6 and supplied 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 parts of the flat comb-shaped paper binder, especially the low-heat reaction molding material in those parts, at low heat just before the molding process so that only the comb teeth and comb tooth connection parts of the flat comb-shaped paper binder are melted. For example, it can 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 that has been heated to a low temperature is sent by a conveying means to a molding device 8, which molds the flat, comb-tooth-shaped paper binder 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, and then the flat, comb-tooth-shaped paper binder is rolled up again (9).

[0051] Fig. 5 is a schematic diagram showing the sequence of molding steps 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 operates downward to abut against the upper part of the inner die 8', a side die 8b that operates laterally to abut against the side surface of the inner die 8', and a lower die 8c that operates upward to abut against the lower part of the inner die 8', and the upper die, side die, and lower die operate sequentially without re-transporting during the molding step to mold the flat comb-shaped paper binder placed on the inner die into a cylindrical shape.

[0052] Preferably, the molding device according to another aspect of the present invention comprises an upper die that operates downward to abut against the upper part of the inner die, and a lower die that operates upward to abut against the lower part of the inner die, and the upper die and the lower die operate sequentially without re-transporting during the molding process to mold the flat comb-shaped paper binder placed on the inner die into a cylindrical shape. In this case, the lower die comprises a first lower die and a second lower die that operate independently, and the first lower die and the second lower die 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 a separate re-transportation. 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 is provided, or cooling can be performed directly by blowing air or cooling air outside the mold.

[0054] With reference to FIG. 5, the molding process using the molding device according to the present invention will be described as follows.

[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. 5b, the upper mold 8a moves downward toward the lower inner mold 8', so that the support rod 8 attached 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 to abut against the upper part of the inner mold 8' and pressurize it, thereby molding the upper surface of the comb-shaped paper binder placed above into a semicircular shape. In this case, next, as shown in FIG. 5(d), the side mold 8b operates laterally while being maintained as it is without a separate re-transportation process, abuts against the front side surface of the inner mold 8' and pressurizes it, molding the lower surface of the comb-shaped paper binder placed above into a semicircular shape. Next, as shown in Fig. 5(e), the lower die 8c similarly operates upwards without a separate re-transportation process to come into contact with the lower part of the inner die 8' and apply pressure, molding the lower surface of the comb-tooth-shaped paper binder placed above into a semicircular shape. Next, as shown in Fig. 5(f), the upper and lower dies are released from the inner die, 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'. This eliminates the need to configure the molding process in two stages as in conventional technology, and enables the molding to be carried out sequentially without the need for re-transportation during the molding process, thereby significantly improving productivity.

[0057] Preferably, instead of the side mold, 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 upwards sequentially.

[0058] Figures 6(a) and 6(b) 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, and Figures 7(a) and 7(b) 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.

[0059] 6(a) and 6(b), when the tips of the comb teeth are molded into a cylindrical shape to face each other corresponding to the comb teeth connection part by the molding device, a straight (flat) part 56 may be molded on the spine part opposite the comb teeth tip 52a and the comb teeth connection part 54, which are expanded outward so as to protrude from each other. This is because, when the tips of the comb teeth and the comb teeth connection part, which are expanded outward so as to protrude from each other, are joined to each other in the later binding and bookbinding step, the straight part formed on the spine part opposite the tips of the comb teeth and the comb teeth connection part is smoothly turned into a perfect circle by the elasticity of the paper ring binder with the "folding points X" at both ends as force points, and in particular, the perfect circle can be maintained without any particular deformation due to its considerable durability even after bookbinding.

[0060] 7(a) and 7(b), a long groove 58 recessed inward toward the widening portion may be formed in the center of the straight portion. When the tips of the comb teeth and the comb teeth connecting portion, which are widened outward so as to protrude from each other, are joined together in the subsequent binding and bookbinding step, the long groove formed in the center of the straight portion is used as a force point to smoothly form a perfect circle due to the elasticity of the paper ring binder, and in particular, even after bookbinding, the perfect circle can be maintained without any particular deformation due to its considerable durability. In addition, the long groove has the effect of preventing deformation of the laminated roll paper (for example, a misalignment phenomenon between the laminated outer roll paper and inner roll paper, or a tunnel phenomenon (a phenomenon in which floating occurs between laminated sheets of paper) due to the difference in the overall circumference between the inner diameter of the inner roll paper and the outer diameter of the outer roll paper when the laminated roll paper of the inner roll paper and the outer roll paper is molded into a cylindrical shape.

[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 modify or change the present invention in various ways without departing from the technical spirit and scope of the present invention as set forth 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 producing a paper binder, providing a 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 side of the inner roll paper and the outer roll paper are positioned opposite each other and laminated to each other at low heat via a low-heat reactive molding material; a step of slitting the laminated roll paper to a desired width, and cutting the slit roll paper to have the shape of the comb tooth portion and the comb tooth connecting portion to form 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 is heated by a conveying means to a molding device, and molding the flat comb-shaped paper binder into a cylindrical shape by the molding device so that the tips of the comb teeth of the flat comb-shaped paper binder face each other in correspondence with the comb teeth connecting portion, 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 lamination by low heat and the cylindrical molding by low heat 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 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 portion of the flat comb-tooth-shaped paper binder to the comb tooth connecting portion by high heat rise when it is later inserted into a punched paper product and bound. This is 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. The method for manufacturing a paper binder described in 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 without being re-transported during the molding process to mold the 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 die comprises a first lower die and a second lower die which operate independently, and the first lower die and the second lower die are configured to operate independently in sequence.

6. The method for manufacturing a paper binder described in 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 without being re-transported during the molding process to mold the flat comb-tooth-shaped paper binder placed on the inner mold into a cylindrical shape.

7. The method for manufacturing a paper binder according to claim 4, wherein the inner mold is further provided with a cooling means for cooling at least one of the upper mold and the lower mold inside or outside the mold, and is cooled simultaneously with molding by the molding device without being separately transported again.

8. A method for manufacturing a paper binder as described in claim 4 or 6, wherein a support rod attached so as to protrude partially from the lower end of the upper mold is configured to pressurize and support a flat comb-tooth-shaped paper binder placed on the inner mold by moving the upper mold downward toward 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 molding device molds the tips of the comb tooth portions into a cylindrical shape so that they face each other in correspondence with the comb tooth connection portion, straight lines are further molded into the tips of the comb tooth portions that expand to protrude toward each other and into the back portion on the opposite side of the comb tooth connection portion.

11. The method for producing a paper binder according to claim 10, further comprising forming a groove recessed inward toward the centrally expanding portion of the straight portion.

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 side of the inner roll paper and the outer roll paper are positioned so as to face each other and are laminated to each other at low heat via a low-heat reactive molding material; a low-heat pressure roller unit that melts a part 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 into a desired width; a cutting section that cuts the slit roll paper into a shape having a comb tooth portion and a comb tooth connecting portion to form a flat comb tooth-shaped paper binder; A low-temperature heating section that heats the low-temperature reaction molding material in the flat comb-shaped paper binder with a heating plate or heating zone so that only the low-temperature 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 the tips of the comb-tooth parts of the flat comb-tooth-shaped 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 lamination caused by the low heat and the cylindrical molding caused by the low heat rise, and the low-heat reaction molding material has the function of laminating the inner roll paper and the outer roll paper by the 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 portion of the flat comb-tooth-shaped paper binder to the comb tooth connecting portion by the high heat rise when it is later inserted into a punched paper product and bound, characterized in that the paper binder system.

13. The flat comb-shaped paper binder is molded into cylindrical comb-tooth tips and comb-tooth connection parts that are expanded by the molding part so as to protrude from each other and face each other, The paper binder system of claim 12, further comprising a binding section which, when a punched paper product is inserted into the tip of the comb tooth section and pressurized so that the tip of the comb tooth section abuts the comb tooth connection section, bonds the paper products together without a separate adhesive by the high-temperature reactive bonding material melted by high temperature rise.

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 described in 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 without being re-transported during the molding process to mold the 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 die comprises a first lower die and a second lower die that operate independently, and the first lower die and the second lower die are configured to operate independently in sequence.

17. The paper binder system described in 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 laterally 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 without being re-transported during the molding process to mold the 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 includes a cooling means for cooling at least one of the upper mold and the lower mold inside or outside the mold, and is cooled simultaneously with molding by the molding device without a separate re-transportation.

19. A paper binder produced by the method according to any one of claims 1 to 11.

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