Paper binding clip, method of manufacturing the same, and manufacturing apparatus

Abstract

The present invention relates to a method of manufacturing a paper binding clip, and includes the steps of: providing a composite web, coating one side of an inner web and an outer web with a high-heat reactive bonding material, and placing the other side of each of the inner web and the outer web opposite each other with a low-heat reactive molding material interposed therebetween, and bonding the inner web and the outer web to each other by low-heat; cutting the composite web to a predetermined width, and cutting the cut web into a shape having a comb tooth portion and a comb tooth connecting portion, thereby forming a flat comb tooth-shaped binding member; heating the low-heat reactive molding material in the flat comb tooth-shaped binding member by a heating plate or a heating zone; and transferring the flat comb tooth-shaped binding member, which has been heated by the low-heat reactive molding material, to a molding device by a transfer device, and molding the flat comb tooth-shaped binding member into a cylindrical shape with the comb tooth portion front end facing the comb tooth connecting portion.

Description

Technical Field

[0001] This invention relates to a paper binding clip, its manufacturing method and manufacturing apparatus, which is used for binding by punching holes, like notebooks, sketchbooks, calendars and notepads. Background Technology

[0002] Typically, the methods of binding or making books by punching holes, similar to those used in notebooks, sketchbooks, calendars, and notepads in the past, include coil binding and twin binding, using either wire or plastic (PVC, PET) rings. Coil binding involves inserting a row of coils continuously into each punched hole, binding them in a radial pattern. Twin binding involves inserting two rows of rings into each punched hole, interlocking them, and binding them in an O-ring pattern.

[0003] Recently, considering the trend / requirements of product environmental protection and the issue of separation and recycling when discarding products, products that use wire or plastic rings as described above require the wire and plastic to be separated from the paper for recycling when discarded, which is troublesome. In addition, the wire or plastic rings themselves are not environmentally friendly.

[0004] In addition, there is a problem with office and stationery products such as notebooks, sketchbooks, calendars, and notepads that are bound with wire or plastic rings. Because the protruding ends of the wire or plastic at both ends of the coils are sharp, accidents such as hand punctures or cuts often occur when using the products.

[0005] Prior art (Patent No. 10-1124063) discloses a product that can use paper instead of wire in double-ring binding. However, prior art paper products used in double-ring binding have various fundamental problems.

[0006] The manufacturing process and problems of the double ring disclosed in the prior art (Patent No. 10-1124063) will be explained below.

[0007] (1) Liquid adhesives (heat sealants)

[0008] In existing technologies, polymers are dissolved in a composite organic solvent and then coated with a heat sealant between the sheets. In this way, the polymers contained in the organic solvent, i.e. the heat sealant, are a major cause of air pollution due to the volatile organic substances. Furthermore, because they are harmful to the human body and flammable, they are substances that are prone to causing fires.

[0009] In addition, after the liquid adhesive is applied to the paper surface, long-term or long-duration thermal drying is required to allow the organic solvents to evaporate, which leads to complex processes and increased installation costs.

[0010] In existing technologies, liquid heat sealants are not only necessary for paper lamination processes that bond paper together, but also for subsequent forming processes where the heat sealant is reheated for shaping. Furthermore, they are essential adhesives used in binding processes to thermally bond the front ends of the comb teeth to the comb tooth connections by exposing the heat sealant at the front end of the comb tooth pattern. In particular, because these heat sealants are in a low-viscosity liquid state, they easily penetrate the paper during coating processes, resulting in insufficient solid film formation and limitations in ensuring adequate rigidity. Consequently, even when using paper thicker than 1 mm, sufficient rigidity as an adhesive cannot be guaranteed.

[0011] (2) The unnecessaryness of the semi-cutting process and the rewinding process

[0012] The existing technology involves exposing the heat sealant to the front end of the comb pattern by cutting the front end of the comb pattern. As described above, since the existing technology requires a front end cutting process of the comb pattern to expose the heat sealant to the front part of the comb pattern, it is necessary to add a lead-out device for leading out the laminated paper of the comb pattern wound on the spool, a semi-cutting device for cutting the front end of the comb pattern of the laminated paper, and a winding device for rewinding the laminated paper led out from such a semi-cutting device onto the spool.

[0013] This complex process is a factor that unnecessarily increases manufacturing costs. In addition, the necessary equipment increases the cost of the equipment / devices, which is also a factor that increases costs.

[0014] (3) Complex processes and equipment involving two-part transfer in the molding process

[0015] In the existing molding process, the molding device includes: a first molding section and a second molding section, which have a platform-shaped base frame and a pressure mechanism; and multiple conveying sections that convey stacked paper from the front and back of the molding sections on both sides, and the conveying section, the first molding section, the conveying section, the second molding section and the conveying section are arranged sequentially on the base frame.

[0016] The existing technology consists of a first molding section and a second molding section to form a molding process. The problem is that it unnecessarily adds a transportation process and equipment.

[0017] In other words, the complex molding process, which involves molding in two parts, results in low productivity and increases manufacturing costs due to the need for unnecessary machinery.

[0018] (4) Heating function of multiple clamping plates in the molding process

[0019] Because the molding film is not fully formed in the composite process, the molding device must heat the fixture plate during the molding process. As a result, the molded part must be separated from the fixture plate after molding and then cooled. During the cooling period after separation, the molded part has the ability to recover its original shape. As a result, the accuracy of the desired molded shape is reduced and sufficient toughness cannot be ensured.

[0020] In the forming process of paper binding clips consisting of cylindrical bending and folding parts, multiple clamping plates with heating functions for both the first and second forming parts are required, along with cooling devices for each part.

[0021] Therefore, the heating of the fixture plate during molding unnecessarily prolongs the operation time, and cooling is required after molding, so the manufacturing process takes a long time, resulting in low production efficiency and difficulty in accurate molding.

[0022] (5) The necessity of “U”-shaped protective paper

[0023] According to existing binding clips, the heat sealant is exposed at the front end of the comb pattern section. Therefore, when the binding clip, to be formed in the molding process, is wound onto the spool, the exposed heat sealant may adhere incorrectly to the surface and underside of the binding clip itself. Consequently, in the prior art, a process must be employed where paper manufactured in a "U" shape wraps around a C-shaped binding clip before winding. The problem is that this additional paper material, additional manufacturing process, and additional winding device complicate the manufacturing process and equipment, resulting in low production efficiency and increased manufacturing costs. Summary of the Invention

[0024] The purpose of this invention is to improve production efficiency by eliminating the use of liquid adhesives and the need for a long drying interval / time to evaporate organic solvents. It also eliminates the need for complex processes such as the half-cutting and rewinding processes required in the prior art to expose the heat sealant to the front end of the comb teeth, and eliminates the need to separately manufacture and use the "U"-shaped protective paper required in the prior art to prevent the adhesion and tangling of the heat sealant exposed to the front end of the comb teeth. The binding clip itself can be directly wound, thereby simplifying the production process and reducing unnecessary paper waste.

[0025] The purpose of this invention is that, since the front-end cutting process in the prior art is not required, the thickness of the front end of the comb teeth and the connecting part of the comb teeth is the same, resulting in easy winding onto the spool without problems such as the expansion or shrinkage of the shape of the front end of the comb teeth. In particular, it maintains its shape during circulation, thereby facilitating the insertion operation in the binding process.

[0026] The purpose of this invention is to preheat the comb teeth by a heating plate (or heating zone) before the forming process, and to cool the comb teeth in a fixed position while forming them sequentially, without having to transfer the comb teeth and comb teeth connecting parts again, thereby shortening the production time and achieving precise bending.

[0027] The purpose of this invention is to add a straight section (or a long groove in the middle of the straight section) to the back side opposite to the front end of the comb teeth and the comb tooth connecting section when the comb teeth front end and the comb tooth connecting section are joined together in a mutually convex form. In this way, a true circle is naturally formed by the elasticity of the paper ring binder, with the two "fold points" (or the long groove in the middle of the straight section) at both ends of the straight section as force points. In particular, the true circle is maintained with considerable durability after binding and will not be deformed.

[0028] To achieve the objectives described above, one embodiment of the present invention provides a method for manufacturing a paper binding clip, characterized by comprising the following steps: providing a composite roll of paper; coating one side of the inner roll and the outer roll with a high-temperature reactive bonding material, and placing the uncoated sides of the inner roll and the outer roll opposite each other, and bonding the inner roll and the outer roll together by low-temperature heating using a low-temperature reactive molding material as a medium; cutting the composite roll of paper to a predetermined width, and cutting the cut roll of paper into a shape having comb teeth and comb tooth connecting parts, thereby forming a flat comb-type binding clip; performing low-temperature heating in a heating plate or heating zone to melt only the low-temperature reactive molding material within the flat comb-type binding clip; and transferring... The feeding device transfers the flat, comb-shaped binding material, which has only undergone low-heat reaction molding and low-temperature heating, to the forming device. The forming device then shapes the flat, comb-shaped binding material into a cylindrical shape, with the front end of the comb teeth facing the comb tooth connecting part. The melting point of the high-heat reaction bonding material is at least 10 degrees higher than that of the low-heat reaction molding material, so it is not affected when laminating with low heat or shaping into a cylinder with low-heat heating. The low-heat reaction molding material has the function of laminating the inner and outer paper rolls with low-heat heating and shaping the flat, comb-shaped binding material into a cylindrical shape. Conversely, the high-heat reaction bonding material has the function of joining the front end of the comb teeth of the flat, comb-shaped binding material to the comb tooth connecting part with high heat heating when binding with perforated paper products inserted later.

[0029] According to another embodiment of the present invention, a paper binding clip system is characterized by comprising: a composite roll forming section, which coats one side of an inner roll and an outer roll with a high-heat reactive bonding material, and places the uncoated other sides of the inner roll and the outer roll opposite each other, and composites the inner roll and the outer roll with each other through low-heat by means of a low-heat reactive molding material; a low-heat pressure roller section, which melts a portion of the low-heat reactive molding material by low-heat heating and pressure, thereby composites the inner roll and the outer roll; a cutting section, which cuts the composite roll to a predetermined width; a cutting section, which cuts the cut roll into shapes having comb-tooth portions and comb-tooth connecting portions, thereby forming a flat comb-tooth binding piece; and a low-heat heating section, which melts only the low-heat reactive molding material within the flat comb-tooth binding piece. The process involves: a melting section for low-temperature heating on a heating plate or heating zone; a transfer section for transferring a flat, comb-shaped binding piece, which is only heated by the low-temperature reaction molding material, to a forming device; and a forming section for forming the flat, comb-shaped binding piece into a cylindrical shape, such that the front end of the comb teeth faces the comb tooth connecting part. The melting point of the high-temperature reaction bonding material is at least 10 degrees higher than that of the low-temperature reaction molding material, so that it is not affected when compounding by low heat and forming a cylindrical shape by low-temperature heating. The low-temperature reaction molding material has the function of compounding the inner and outer paper rolls by low-temperature heating and forming the flat, comb-shaped binding piece into a cylindrical shape. Conversely, the high-temperature reaction bonding material has the function of joining the front end of the comb teeth of the flat, comb-shaped binding piece to the comb tooth connecting part by high-temperature heating when binding with a perforated paper product inserted later.

[0030] According to another embodiment of the present invention, a paper binding clip manufactured by the above-described manufacturing method is provided.

[0031] According to the present invention, the following effects are achieved.

[0032] First, the absence of liquid adhesives eliminates the need for extended drying intervals / times to evaporate organic solvents, thereby improving production efficiency. Furthermore, it eliminates the need for complex processes such as the semi-cutting and rewinding required in existing technologies to expose heat sealant to the front end of the comb teeth, resulting in increased production efficiency and cost savings. Additionally, it eliminates the need for separately manufacturing and using the "U"-shaped protective paper required in existing technologies to prevent adhesion and tangling of heat sealant exposed to the front end of the comb teeth; the binding clip itself can be directly wound, simplifying the production process and reducing unnecessary paper waste.

[0033] Secondly, since the front-end cutting process in the prior art is not required, the thickness of the front end of the comb teeth and the connecting part of the comb teeth is the same, which makes it easy to wind onto the spool without problems such as the expansion or shrinkage of the shape of the front end of the comb teeth. In particular, it maintains its shape during circulation, which facilitates the insertion operation in the binding process.

[0034] Third, the comb teeth and comb tooth connection parts are preheated by heating plate (or heating zone) before the forming process, and the comb teeth and comb tooth connection parts do not need to be moved again. They are formed in a fixed position and cooled at the same time, thereby shortening the production time and achieving precise bending.

[0035] Fourth, when the front end of the comb teeth and the comb tooth connecting part, which are convex outwards, are joined together, a straight part (or a long groove in the middle of the straight part) is added to the back of the opposite side of the front end of the comb teeth and the comb tooth connecting part. Thus, the two "fold points" (or the long groove in the middle of the straight part) at both ends of the straight part are used as force points, and the elasticity of the paper ring binding clip naturally forms a true circle. In particular, the true circle is maintained with considerable durability after binding and will not be deformed. Attached Figure Description

[0036] Figure 1 This is a schematic diagram illustrating the compounding, cooling, and cutting process according to the present invention.

[0037] Figure 2 A roll of paper and an example cross-section thereof are shown after the compounding, cooling and cutting process according to the present invention.

[0038] Figure 3 The illustration shows a flat, comb-shaped binding piece made by symmetrically cutting a rolled paper roll into the shape of a comb tooth section and a comb tooth connection section.

[0039] Figure 4 This is a schematic diagram illustrating the heating and molding process according to the present invention.

[0040] Figure 5 This is a schematic diagram illustrating a molding process performed sequentially by the molding apparatus according to the invention.

[0041] Figure 6 (a) and Figure 6 (b) shows a perspective view and a cross-sectional view of a paper binding clip formed into a cylindrical shape by a forming apparatus according to an embodiment of the present invention.

[0042] Figure 7 (a) and Figure 7 (b) shows a perspective view and a cross-sectional view of a paper binding clip formed into a cylindrical shape by a forming apparatus according to another embodiment of the invention. Detailed Implementation

[0043] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0044] Figure 1 This is a schematic diagram illustrating the compounding, cooling, and cutting processes according to the present invention. (Refer to...) Figure 1 The inner roll 10, the low-temperature reactive molding material film 30a, the middle roll 40, the low-temperature reactive molding material film 30b, and the outer roll 20, which are respectively wound on spools arranged sequentially in the lead-out device 1, are continuously drawn out and supplied. In this case, one side of the inner roll 10 and the outer roll 20 are coated with high-temperature reactive bonding materials 10a and 20a, respectively. As the supplied inner roll 10, low-temperature reactive molding material film 30a, middle roll 40, low-temperature reactive molding material film 30b, and outer roll 20 pass through the low-temperature pressure roller 2, a composite roll is formed by the melting of the low-temperature reactive molding materials 30a and 30b. In this case, the uncoated other sides of the inner roll 10 and the outer roll 20 are composited in a form where they face each other. Therefore, the outer sides of the composite roll are coated with high-temperature reactive bonding materials 10a and 20a. After the composite paper roll is cooled by the cooling device 3, it is cut to a specified width by a known cutting device 4 and then wound onto the roll 5. In particular, the low-heat pressure roller 2 consists of an upper / lower pair of rollers, and only the low-heat reaction molding materials 30a and 30b are heated to a degree that allows them to melt, so that it does not affect or damage the high-heat reaction bonding materials 10a and 20a coated on the outer sides of both sides of the composite paper roll.

[0045] Preferably, the high-temperature reactive bonding materials 10a and 20a have a melting point at least 10 degrees higher than the low-temperature reactive molding materials 30a and 30b, and are unaffected during compounding with the low-temperature pressure roller 2 and subsequent low-temperature heating molding into cylindrical shapes. More preferably, the high-temperature reactive bonding material has a melting point at least 30 degrees higher than the low-temperature reactive molding material.

[0046] Preferably, the low-heat reaction molding materials 30a and 30b are biodegradable films, but can also be polyethylene films, soft PVC films, or heat-liquefied solid films. The coating or film thickness of the low-heat reaction molding material is 50 to 200 μm.

[0047] Preferably, the low-heat reaction molding material uses an environmentally friendly biodegradable material composed solely of 100% naturally degradable biodegradable materials such as corn polylactic acid (PLA), cellulose, and chemical polymers (PBAT). In this case, during landfilling, under certain conditions of sunlight, temperature, and humidity (composting conditions such as 58 degrees Celsius and 70% humidity), the first decomposition occurs, followed by a second decomposition process by microorganisms (bacteria, molds, etc.), resulting in 100% natural decomposition into water and carbon dioxide within 180 days. Therefore, it achieves the effect of preventing environmental pollution and ecosystem damage. It is not recycled but classified as general waste, which can be easily disposed of and is also suitable for landfilling and soil composting. Incineration does not release any carcinogens, and the biodegradable plastics made from the biodegradable raw materials (EL724) can also be reused.

[0048] The low-heat reaction molding material described above has the function of bonding the inner and outer rolls of paper together by low-heat heating (composite function) and the function of molding the subsequent flat comb-shaped binding parts into a cylindrical shape (molding function).

[0049] Preferably, the high-heat reactive bonding materials 10a and 20a are environmentally friendly water-soluble coating materials with a higher melting point than low-heat reactive molding materials, and are also environmentally friendly materials with water resistance, oil resistance, and sealing properties. The thickness of the coating layer of the high-heat reactive bonding material is 5 to 20 μm.

[0050] The high-temperature reactive bonding material has the function of bonding the front end of the comb teeth of the flat comb-shaped binding material to the comb tooth connection part by heating it up with high heat, together with the water-resistant and oil-resistant function (coating function) when the perforated paper product is inserted for binding.

[0051] As mentioned above, the high-temperature reactive bonding material must have a melting point at least 10 degrees Celsius higher (preferably 30 degrees Celsius higher) than the low-temperature reactive molding material. This is to ensure that the high-temperature reactive bonding material, which performs coating and bonding functions during binding or bookmaking, is not affected by the aforementioned low-temperature lamination and low-temperature heating molding of cylindrical materials. In particular, it should be noted that high-temperature and low-temperature are relative concepts here.

[0052] (A) Process (B) Process

[0053] 300 degrees Celsius => High fever 200 degrees Celsius => High fever

[0054] 200 degrees Celsius => low fever 150 degrees Celsius => low fever

[0055] For example, polyethylene molten at 200 degrees Celsius can be a low-heat reactive molding material in process (A) and a high-heat reactive bonding material in process (B).

[0056] In other words, depending on the process, even the same material can be a low-temperature reactive molding material or a high-temperature reactive bonding material.

[0057] Because the low-temperature reactive molding material reacts at a relatively low temperature compared to the high-temperature reactive bonding material, even in the lamination and molding processes performed at a low temperature, there is no impact on the previously coated high-temperature reactive bonding material. Therefore, the high-temperature reactive bonding material must have a melting point that is at least 10 degrees higher (preferably, 30 degrees higher) than that of the low-temperature reactive molding material.

[0058] Preferably, the low-heat reaction molding material can be a biodegradable film, polyethylene film, PVC film, hot melt adhesive, etc., which react at 100 to 220 degrees Celsius, but most preferably, it is an environmentally friendly biodegradable film.

[0059] The high-temperature reactive binder can be a water-dispersible thermosetting acrylic copolymer that reacts at 300 to 400 degrees Celsius, a thermoplastic material such as polyethylene that reacts at 160 to 220 degrees Celsius, a hot melt adhesive, etc., but most preferably, it is an environmentally friendly water-dispersible thermosetting acrylic copolymer.

[0060] Figure 2 A roll of paper and an exemplary cross-section thereof are shown after the compounding, cooling and cutting process according to the present invention. Figure 2 The example diagram in (a) shows "an inner roll paper 10 with a high-temperature reactive bonding material 10a coated on its outer surface, a low-temperature reactive molding material film 30a, an intermediate roll paper 40, a low-temperature reactive molding material film 30b, and an outer roll paper 20 with a high-temperature reactive bonding material 20a coated on its outer surface." Figure 1 The cross-section shown is a sequential composite of processes. Figure 2 The example diagram in (b) illustrates... Figure 1 In cases where an intermediate roll of paper is not required, a cross-section is formed by sequentially combining an inner roll of paper 10 with an outer surface coated with a high-heat-reactive bonding material 10a, a low-heat-reactive molding material film 30, and an outer roll of paper 20 with an outer surface coated with a high-heat-reactive bonding material 20a. In particular, when manufacturing paper binding clips with larger diameters, additional rigidity reinforcement is especially necessary, especially in cases such as… Figure 2 As shown in (a), the structure can be configured such that an intermediate roll 40 is added between the inner roll 10 and the outer roll 20, and low-temperature reactive molding material films 30a and 30b are added between these rolls. Therefore, depending on whether an intermediate roll 40 is added between the inner roll 10 and the outer roll 20 and the number of sheets of the intermediate roll 40 added, it can be configured with 3, 5, or 7 layers. For reference, Figure 2 The cross-section in example (a) shows a structure consisting of 5 layers. Figure 2The cross section in example (b) shows that it consists of 3 layers.

[0061] Figure 3 A flat, comb-shaped binding piece 50 is shown, made by symmetrically cutting a rolled paper roll into the shape of a comb tooth portion 52 and a comb tooth connecting portion 54. (See reference...) Figure 3 The cut roll of paper is cut into shapes with comb-tooth portions 52 and comb-tooth connecting portions 54, thereby forming a flat comb-tooth-shaped binding piece 50. This cutting process is accomplished by mounting a mold on a pressure machinery device, such as... Figure 3 As shown, the comb teeth and the comb tooth connection are cut in a symmetrical manner along the left and right sides.

[0062] Preferably, the mold used in the cutting process is a composite mold. The upper and lower frames intersect and cut symmetrically from left to right. The comb teeth and comb tooth connections clamped on one side of the lower frame are pulled upwards and moved by a sliding pad installed inside the lower frame. The sliding pad is configured to move up and down via a spring inside the lower frame. When the upper frame presses against the lower frame under strong pressure while symmetrically cutting the comb teeth and comb tooth connections from left to right, the spring inside the lower frame pushes downwards through the upper frame. When the upper frame rises upwards, due to the elasticity of the spring inside the lower frame, the comb teeth and comb tooth connections clamped on one side of the lower frame are pulled upwards and moved.

[0063] Figure 4 This is a schematic diagram illustrating the heating and molding process according to the present invention. (Refer to...) Figure 4 The cut, flat, comb-shaped binding part 50 is drawn from the wound spool 6 and supplied to a heating plate or heating zone 7. In other words, in the heating plate or heating zone 7, it is sufficiently heated at a low temperature so that only the comb teeth and comb tooth connecting parts of the flat, comb-shaped binding part, especially the low-temperature reactive molding material in these parts, can be melted before the molding process. For example, it can be configured as a heating plate controlled and heated by a heater or a heating zone controlled by hot air.

[0064] The flat comb-shaped binding piece, heated by low heat, is transferred to the forming device 8 by a transfer device, and the forming device shapes the flat comb-shaped binding piece into a cylindrical shape, so that the front end of the comb tooth and the comb tooth connecting part face each other, and then it is wound again 9.

[0065] Figure 5 This is a schematic diagram illustrating a molding process performed sequentially by the molding apparatus according to the invention. (Refer to...) Figure 5The molding apparatus 8 of the present invention includes an upper mold 8a that operates in the downward direction and is connected to the upper part of the inner mold 8', a side mold 8b that operates in the side direction and is connected to the side of the inner mold 8', and a lower mold 8c that operates in the upward direction and is connected to the lower part of the inner mold 8'. The upper mold, side mold and lower mold are not transferred again in the molding process and are operated sequentially to form a flat comb-shaped binding piece placed on the inner mold into a cylindrical shape.

[0066] Preferably, another forming apparatus of the present invention may include an upper mold that operates in the downward direction and is connected to the upper part of an inner mold, and a lower mold that operates in the upward direction and is connected to the lower part of an inner mold. The upper mold and the lower mold are not transferred again during the forming process, and are operated sequentially to form the flat comb-shaped binding piece placed on the inner mold into a cylindrical shape. In this case, the lower mold consists of 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.

[0067] Most preferably, a cooling device is also provided for cooling at least one of the inner mold, upper mold, and lower mold, so that cooling can be carried out simultaneously with molding by the molding device without further transfer. For example, room temperature cooling can be carried out in winter, and at least one cooling device capable of allowing water or air to flow can be provided inside each mold in summer, or air can be supplied directly from the outside of the mold or cooled air can be used for cooling.

[0068] Reference Figure 5 The molding process performed by the molding apparatus according to the present invention will be described below.

[0069] First, such as Figure 5 As shown in (a), the flat, comb-shaped binding piece is placed on the inner mold 8' of the forming device. Then, as... Figure 5 As shown in (b), as the upper mold 8a moves downward toward the lower inner mold 8', the support rod 8x, which is partially protruding from the lower end of the upper mold 8a, presses down on and supports the flat, comb-shaped binding piece placed on the inner mold 8'. Then, as... Figure 5 As shown in (c), the upper mold 8a is moved downwards to engage with the upper part of the inner mold 8' and pressure is applied, thereby shaping the upper side of the placed comb-shaped binding piece into a semi-circle. In this case, then as follows Figure 5 As shown in (d), without requiring additional retransfer process, the side mold 8b operates in the lateral direction and contacts and presses against the front side of the inner mold 8', simultaneously shaping the front of the placed comb-shaped binding piece into a semi-circle. Then, as... Figure 5As shown in (e), similarly, without the need for a separate re-transfer process, the lower mold 8c operates upwards and laterally, engaging with and pressing against the lower part of the inner mold 8', simultaneously shaping the lower side of the placed comb-shaped binding piece into a semi-circle. Then as... Figure 5 As shown in (f), the upper mold and lower mold are separated from the inner mold, and the flat comb-shaped binding piece can be formed into a cylindrical shape.

[0070] In particular, such as Figure 5 (b) to Figure 5 As shown in (e), a series of molding processes are performed with the support rod 8x pressing and supporting the flat comb-shaped binding piece placed on the inner mold 8'. Therefore, it is not necessary to divide the molding process into two stages as in the prior art, and molding can be performed sequentially without re-transferring during the molding process, thereby greatly improving production efficiency.

[0071] Preferably, instead of the side mold, the lower mold can be configured as a first lower mold and a second lower mold that operate independently. In this case, the first lower mold and the second lower mold can be operated sequentially in the upward direction.

[0072] Figure 6 (a) and Figure 6 (b) shows a perspective view and a cross-sectional view of a paper binding clip formed into a cylindrical shape by a forming apparatus according to an embodiment of the present invention. Figure 7 (a) and Figure 7 (b) shows a perspective view and a cross-sectional view of a paper binding clip formed into a cylindrical shape by a forming apparatus according to another embodiment of the invention.

[0073] Reference Figure 6 (a) and Figure 6 (b) When the comb tooth front end and the comb tooth connecting part are formed into a cylindrical shape facing each other by the forming device, a straight (planar) portion 56 is additionally formed on the opposite back side of the comb tooth front end 52a and the comb tooth connecting part 54, which are mutually protruding and facing each other. In the subsequent binding and book-making steps, when the comb tooth front end and the comb tooth connecting part, which are mutually protruding and outwardly unfolded, are joined together, a true circle is naturally formed by the elasticity of the paper ring binding clip at the two "fold points X" at both ends of the straight portion formed on the opposite back side of the comb tooth front end and the comb tooth connecting part. In particular, the true circle can be maintained with considerable durability after book-making without any special deformation.

[0074] Reference Figure 7 (a) and Figure 7(b) A long groove 58, which is recessed inward toward the unfolded portion, can be added to the center of the straight portion. In subsequent binding and book-making steps, when the front ends of the comb teeth and the comb tooth connecting portions that bulge outward and unfold to each other are joined together, the long groove formed in the center of the straight portion acts as a force point, and the elasticity of the paper ring binding clip naturally forms a perfect circle. In particular, after book-making, the perfect circle can be maintained with considerable durability without any special deformation. In addition, when the roll of paper that is combined with the inner roll and the outer roll is formed into a cylinder, the long groove has the following effect: it prevents deformation of the combined roll of paper due to the difference in the circumference of the inner diameter of the inner roll and the outer diameter of the outer roll [e.g., the phenomenon of pushing or tunneling between the combined outer roll and the inner roll (the phenomenon of warping, etc., between the combined papers)].

[0075] While specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the specific structures described above. Those skilled in the art can make various modifications or variations to the present invention without departing from the technical concept and scope of the invention as set forth in the patent claims. However, it should be clarified beforehand that such simple design modifications or structural variations are clearly within the scope of the present invention.

Claims

1. A method for manufacturing a paper binding clip, characterized in that, It includes the following steps: A composite roll is provided in which one side of the inner roll and one side of the outer roll are coated with a high-heat reactive bonding material, and the other uncoated sides of the inner roll and the outer roll are placed opposite each other, and the inner roll and the outer roll are bonded together by low heat through a low-heat medium using a low-heat reactive molding material as a medium. The composite roll of paper is cut to a specified width, and the cut roll of paper is then cut into shapes with comb teeth and comb tooth connecting parts, thereby forming a flat comb tooth-shaped binding piece; To ensure that only the low-heat reactive molding material within the flat, comb-shaped binding component melts, a low-heat heating process is performed on a heating plate or in a heating zone; and A flat, comb-shaped binding part, obtained by low-heat reaction molding material, is transferred to a molding device via a transfer device. The molding device then shapes the flat comb-shaped binding part into a cylindrical shape, such that the front end of the comb teeth faces the comb tooth connection part. The melting point of the high-temperature reactive bonding material is at least 10 degrees higher than that of the low-temperature reactive molding material. It is unaffected when compounding with low heat and when molding into a cylinder with low heat. The low-temperature reactive molding material has the function of compounding the inner and outer paper rolls with low heat and molding flat comb-shaped binding parts into cylinders. In contrast, the high-temperature reactive bonding material has the function of joining the front end of the comb teeth of the flat comb-shaped binding part to the comb tooth connection part with high heat when binding with punched paper products.

2. The method for manufacturing paper binding clips according to claim 1, characterized in that, The inner and outer rolls of paper are combined with each other by melting the low-heat reaction molding material while passing through the low-heat pressure rollers.

3. The method for manufacturing paper binding clips according to claim 1, characterized in that, The melting point of a high-temperature reactive bonding material is at least 30 degrees higher than that of a low-temperature reactive molding material.

4. The method for manufacturing paper binding clips according to claim 1, characterized in that, The forming device includes: an upper mold that operates downward and connects to the upper part of an inner mold; and a lower mold that operates upward and connects to the lower part of an inner mold. The upper mold and the lower mold do not need to be transferred again during the forming process, but are operated sequentially to form a flat comb-shaped binding piece placed on the inner mold into a cylindrical shape.

5. The method for manufacturing paper binding clips according to claim 4, characterized in that, The lower mold includes 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. The method for manufacturing a paper binding clip according to claim 1, characterized in that, The forming apparatus includes: an upper mold that operates downward and connects to the upper part of an inner mold; a side mold that operates laterally and connects to the side of the inner mold; and a lower mold that operates upward and connects to the lower part of the inner mold. The upper mold, side mold, and lower mold do not need to be transferred during the forming process, but are operated sequentially to form a flat comb-shaped binding piece placed on the inner mold into a cylindrical shape.

7. The method for manufacturing a paper binding clip according to claim 4, characterized in that, A cooling device is also provided inside or outside the mold for cooling at least one of the inner mold, upper mold and lower mold, so that cooling is carried out while the molding device is forming without further transfer.

8. The method for manufacturing a paper binding clip according to claim 4 or 6, characterized in that, As the upper mold moves downward toward the inner mold, a support rod, which is mounted as a protrusion from the lower end of the upper mold, presses down on and supports the flat, comb-shaped binding piece placed on the inner mold.

9. The method for manufacturing a paper binding clip according to claim 1, characterized in that, Between the outer and inner rolls, there may be additional layers of middle rolls and low-heat reactive molding material on both sides.

10. The method for manufacturing a paper binding clip according to claim 1, characterized in that, When the front end of the comb tooth and the comb tooth connecting part are formed into a cylindrical shape with the comb tooth facing each other in a corresponding manner by the forming device, a straight part is additionally formed on the back side opposite to the front end of the comb tooth and the comb tooth connecting part, which are unfolded in a mutually protruding manner.

11. The method for manufacturing a paper binding clip according to claim 10, characterized in that, A long groove is added to the center of the straight section, which is recessed inward toward the unfolded part.

12. A paper binding clip system, characterized in that, include: The composite roll paper generating unit coats one side of the inner roll paper and one side of the outer roll paper with a high-heat reactive bonding material, and places the uncoated other sides of the inner roll paper and the outer roll paper facing each other, and uses a low-heat reactive molding material as a medium to bond the inner roll paper and the outer roll paper together with low heat. The low-heat pressure roller section melts the low-heat reaction molding material through low-heat heating and pressure, thereby combining the inner and outer roll paper; The cutting section cuts the composite roll of paper to the specified width; The cutting section cuts the rolled paper into shapes with comb teeth and comb tooth connecting parts, thereby forming a flat comb-shaped binding piece; The low-heat heating section is designed to melt only the low-heat reaction molding material inside the flat comb-shaped binding part by heating the heating plate or heating zone. The transfer section transfers flat, comb-shaped binding parts, which are formed by low-temperature heating of the material with only low-temperature reaction, to the forming device. as well as The forming section shapes the flat, comb-tooth-shaped binding piece into a cylindrical shape, such that the front end of the comb teeth faces the connecting part of the comb teeth. The melting point of the high-temperature reactive bonding material is at least 10 degrees higher than that of the low-temperature reactive molding material. It is unaffected when compounding with low heat and when molding into a cylinder with low heat. The low-temperature reactive molding material has the function of compounding the inner and outer paper rolls with low heat and molding flat comb-shaped binding parts into cylinders. In contrast, the high-temperature reactive bonding material has the function of joining the front end of the comb teeth of the flat comb-shaped binding part to the comb tooth connection part with high heat when binding with punched paper products.

13. The paper binding clip system according to claim 12, characterized in that, The flat, comb-shaped binding piece is formed by the forming part into a cylindrical structure with the front end of the comb teeth and the connecting part of the comb teeth, which unfold in a mutually protruding form and face each other in a corresponding form. It also includes a binding section, in which the front end of the comb tooth is inserted into a perforated paper product, and the front end of the comb tooth is pressed to make it contact the comb tooth connecting part, thereby joining the front end of the comb tooth and the comb tooth connecting part together by means of a high-temperature reaction bonding material that melts through high-temperature heating, without the need for additional adhesive.

14. The paper binding clip system according to claim 12, characterized in that, The melting point of a high-temperature reactive bonding material is at least 30 degrees higher than that of a low-temperature reactive molding material.

15. The paper binding clip system according to claim 12, characterized in that, The forming part includes: an upper mold that operates in the downward direction and is connected to the upper part of the inner mold; and a lower mold that operates in the upward direction and is connected to the lower part of the inner mold. The upper mold and the lower mold do not need to be transferred during the forming process, but are operated sequentially to form the flat comb-shaped binding piece placed on the inner mold into a cylindrical shape.

16. The paper binding clip system according to claim 15, characterized in that, The lower mold includes 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 binding clip system according to claim 12, characterized in that, The forming section includes: an upper mold that operates in a downward direction and connects to the upper part of an inner mold; a side mold that operates in a side direction and connects to the side of an inner mold; and a lower mold that operates in an upward direction and connects to the lower part of an inner mold. The upper mold, side mold, and lower mold do not need to be transferred during the forming process, but are operated sequentially to form the flat comb-shaped binding piece placed on the inner mold into a cylindrical shape.

18. The paper binding clip system according to claim 15, characterized in that, A cooling device is also provided inside or outside the mold for cooling at least one of the inner mold, upper mold and lower mold, so that cooling is carried out while the molding device is forming without further transfer.

19. A paper binding clip manufactured by the manufacturing method according to any one of claims 1 to 11.

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