Resin blending system for glass fiber reinforced reinforcing rib based on double dipping tanks

Abstract

The resin blending system for the glass fiber reinforced reinforcing rib based on the double dipping tanks comprises a tank assembly and a resin blending assembly, the storage tank is used for storing resin combined with glass fibers; the blending tank is used for blending the resin by using a blender in a state of comprising a first feeding part for feeding a heat curing agent; the distribution tank is used for receiving distribution of the blended resin; a dipping tank assembly which receives the resin supply from the distribution tank and individually includes a first dipping tank for molding the core of the reinforcing rib and a second dipping tank for molding the surface of the reinforcing rib in which the core is molded by the first dipping tank; the conveying assembly comprises a first conveying part for conveying the resin stored in the storage tank to the blending tank, a second conveying part for conveying the resin blended in the blending tank to the distribution tank, and a third conveying part for conveying the resin in the distribution tank to the first dipping tank and the second dipping tank.

Description

Technical Field

[0001] This invention relates to a resin mixing system for glass fiber reinforced ribs based on a double impregnation tank, and more specifically, to a resin mixing system that, in the manufacturing process of ribs based on a double impregnation tank, effectively distributes resin through multiple tanks and a conveying unit to mold the core and surface of the ribs with optimized resin, thereby maximizing the physical properties and consistency of the ribs. Background Technology

[0002] Glass fiber reinforced polymer (GFRP) rebar is a next-generation building material produced through a combination of composite material technology and engineering techniques that combine glass fiber and resin. Compared to steel, it has superior strength and advantages such as low weight, corrosion resistance, and low maintenance costs. It can also reduce overall life-cycle costs and prevent the aging of concrete structures, thus extending their service life. Therefore, it is a new type of material widely used in various building environments such as civil engineering, construction, bridges, tunnels, railways, wind power, and marine structures.

[0003] This type of glass fiber reinforced rib is manufactured by impregnating coarsely spun glass fiber yarn in resin, bundling multiple coarsely spun yarn bundles to form a rod, then forming ribs that function as recesses / protrusions on the surface, and finally cutting them to a fixed length.

[0004] At this point, the impregnation tank consists of a single impregnation tank, so it is often the case that the coarse yarn can only be impregnated once. In this case, it has been pointed out that it is not possible to manufacture a reinforcing rib that can perform the three-dimensional function of providing internal structural stability and surface durability.

[0005] In addition, the resin used for impregnating glass fibers may contain a thermosetting agent. To ensure their uniformity, it is common practice to mix the resin and thermosetting agent in a mixer. As mentioned earlier, the result of providing a single impregnation tank is that the mixed resin is also supplied only to a single impregnation tank.

[0006] Korean Patent No. 2397056 provides a method for forming ribs by winding / rewinding fiber bundles on a wire using a molding system for high tensile strength and corrosion resistance thermosetting composite raw materials. However, this prior art does not get rid of the existing process of simply impregnating a single coarse yarn in a single impregnation tank, thus including the aforementioned problems. Korean Patent No. 2670877 describes a resin impregnation adjustment device for manufacturing glass fiber reinforcing ribs, which adjusts the amount of resin impregnated using a single impregnation process. This device also does not consider the internal and external characteristics of the reinforcing ribs and only adjusts the amount of resin impregnated in a simple one-time impregnation, thus failing to solve the aforementioned problems.

[0007] Therefore, there is a practical need to develop a resin mixing system that, in the manufacturing process of reinforcing ribs based on double impregnation tanks, effectively distributes resin through multiple tanks and conveying units to mold the core and surface of the reinforcing ribs with optimized resin, thereby maximizing the physical properties and consistency of the reinforcing ribs.

[0008] (Prior technical documents)

[0009] (Patent Documents)

[0010] Patent Document 1: Korean Domestic Patent No. 2397056

[0011] Patent Document 2: Korean Domestic Patent No. 2670877 Summary of the Invention

[0012] (The problem the invention aims to solve)

[0013] The present invention was developed to overcome the problems of the above-mentioned technology. Its main purpose is to provide a resin mixing system that, in the manufacturing process of reinforcing ribs based on double impregnation tanks, effectively distributes resin through multiple tanks and conveying units to mold the core and surface of the reinforcing ribs with optimized resin, thereby further enhancing the physical properties and consistency of the reinforcing ribs.

[0014] Another object of the present invention is to supply resin via a pipeline branching to the first impregnation tank during the process of supplying resin from the dispensing tank to the second impregnation tank, thereby naturally regulating the pressure and flow rate of the resin.

[0015] Another object of the present invention is to differentiate the physical properties of the second impregnation tank by introducing a UV curing agent at a location in the conduit leading to the second impregnation tank, thereby providing the surface characteristics of the reinforcing ribs.

[0016] (The measures taken to solve the problem)

[0017] To achieve the above objectives, the resin mixing system for glass fiber reinforced ribs based on the double impregnation tank according to the present invention is characterized by comprising: a tank assembly comprising a storage tank for storing resin bonded to glass fibers, a mixing tank for mixing the resin using a mixer in a state including a first feeding section for adding a thermosetting agent, and a dispensing tank for receiving the dispensing of the mixed resin; an impregnation tank assembly comprising receiving the resin supply from the dispensing tank, and comprising a first impregnation tank for molding the core of the rib and a second impregnation tank for molding the surface of the rib having the core molded in the first impregnation tank; and a conveying assembly comprising a first conveying section for conveying the resin stored in the storage tank to the mixing tank, a second conveying section for conveying the resin mixed in the mixing tank to the dispensing tank, and a third conveying section for conveying the resin from the dispensing tank to the first and second impregnation tanks.

[0018] Furthermore, the present invention is characterized in that the first impregnation tank is configured to be closer to the dispensing tank than the second impregnation tank, and the pipe in the third conveying section connecting the dispensing tank to the first and second impregnation tanks includes a main pipe connecting the dispensing tank and the second impregnation tank and a branch pipe branching from one side of the main pipe to the first impregnation tank.

[0019] Furthermore, the present invention is characterized in that the third conveying unit includes a second input unit located at a location after the branch point where the main pipe branches into a branch pipe, and inputs the UV curing agent into the resin conveyed to the second impregnation tank.

[0020] (The effect of the invention)

[0021] The resin formulation system for glass fiber reinforced ribs based on the double impregnation tank according to the present invention has the following effects:

[0022] 1) The double impregnation tanks, namely the first and second impregnation tanks, which are used to mold the core and surface of the reinforcing ribs with the optimized resin respectively, are each supplied with formulated resin, thereby providing the advantage of providing a basis that can further enhance the physical properties and consistency of the reinforcing ribs.

[0023] 2) It can naturally control the flow of resin toward the first and second impregnation tanks;

[0024] 3) Further addition of UV curing agent to the second impregnation tank has the effect of further enhancing the properties of the second impregnation tank for molding surfaces. Attached Figure Description

[0025] Figure 1 This is a simplified flowchart illustrating the manufacturing process of reinforcing ribs based on a double immersion tank.

[0026] Figure 2 This is a block diagram illustrating the general configuration of the system of the present invention.

[0027] Figure 3 This is a conceptual diagram illustrating the end of the main pipe on the side of the second impregnation tank.

[0028] Figure 4 This is a conceptual diagram illustrating the second input section and the mixer.

[0029] Figure 5 This is a conceptual diagram illustrating a mixer controlled by sensing a first viscosity sensor and a flow sensor located on the pipe behind the second input section.

[0030] Figure 6 This is a conceptual diagram illustrating the structure of multiple second input units arranged at certain intervals along the length of the main pipeline, and the arrangement of the second viscosity sensor and temperature sensor.

[0031] (Explanation of reference numerals in the attached diagram)

[0032] 10: First input section; 20: Second input section; 30: Mixer; 41: First viscosity sensor;

[0033] 42: Second viscosity sensor; 50: Flow sensor; 60: Temperature sensor; 110: Storage tank;

[0034] 120: Mixing tank; 130: Dispensing tank; 210: First impregnation tank; 220: Second impregnation tank;

[0035] 310: First conveying section; 320: Second conveying section; 330: Third conveying section; 331: Main pipeline;

[0036] 332: Branch pipe. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The drawings are not to scale, and the same reference numerals in each drawing refer to the same constituent elements.

[0038] The system of the present invention relates to a system for formulating and dispensing resin bonded to glass fibers into an impregnation tank in the manufacturing process of a glass fiber reinforced polymer rebar (hereinafter referred to as "rebar"). Its main feature is that it not only provides automation of the entire resin formulating and dispensing process, but also, particularly for molding in a manner that distinguishes the core and surface of the rebar, it invents a process in which the impregnation tank is divided into two impregnation tanks, namely, first and second impregnation tanks 210 and 220, to efficiently dispense the formulated resin into the first and second impregnation tanks 210 and 220.

[0039] First, the inherent and unique reinforcing rib manufacturing process of the present invention, which separates the core and surface of the reinforcing rib, will be explained. Then, the detailed structure and function of the resin formulation system of the present invention based on this process will be explained.

[0040] Figure 1 This is a simplified flowchart illustrating the manufacturing process of reinforcing ribs based on a double immersion tank.

[0041] from Figure 1 As can be seen from the above, the reinforcing rib manufacturing process of the present invention includes, in the following order, a supply process, a first impregnation tank impregnation process, a core forming process, a second impregnation tank impregnation process, a rod forming process, and a post-processing process.

[0042] The supply process provides the function of supplying roving yarns, which are provided in reel form and have undergone roving treatment of glass fibers, to subsequent manufacturing / processes. In particular, the supply process of the present invention has the feature of separating the roving yarns into first and second roving yarns and supplying them to the first and second impregnation tanks 210 and 220, respectively.

[0043] The first and second impregnation tanks 210 and 220 use the resin supplied by the resin preparation system of the present invention for impregnation treatment of glass fibers. In the state where the first and second impregnation tanks 210 and 220 are physically divided, the second impregnation tank 220 is located after the first impregnation tank 210 in the time sequence of the process.

[0044] Specifically, the first impregnation tank impregnation process is a process of impregnating the first coarse spun yarn in the first impregnation tank 210. The impregnated glass fiber is then formed into a core wire that serves as a reinforcing core in the core wire forming process (core wire forming section).

[0045] The core wire forming process is a process located between the first and second impregnation tanks 210 and 220, in which the first coarse yarn, after being impregnated in the first impregnation tank 210, is inserted into the nozzle to form the core wire. The core wire can be considered an intermediate before the final completion of the wire.

[0046] At this time, the nozzle provides the function of not only properly gathering the first roving yarn, but also extruding a portion of the resin impregnated in the first roving yarn and increasing the resin impregnation density of the first roving yarn while forming the core yarn.

[0047] The second impregnation tank impregnation process is also a process of using the resin supplied by the resin mixing system of the present invention to impregnate the first coarse yarn bundle, i.e. the core wire, which has passed through the first impregnation tank and the core wire forming part to produce wire. In other words, it provides the function of providing the surface of the finally formed wire or reinforcing rib (forming the surface by adding impregnation resin to the core).

[0048] That is, the core, i.e. the core yarn, which is impregnated in the first impregnation tank 210, provides a basis for enhancing tensile strength by increasing the density of the first coarse yarn by binding it more densely. As for the surface impregnated in the second impregnation tank, although the density is slightly lower than that of the first coarse yarn, the amount of resin impregnation of the second coarse yarn is increased compared to that of the first coarse yarn, thereby providing a basis for enhancing adhesion to concrete, i.e., adhesion strength. In this way, by differentially adjusting the density or amount of resin impregnation of the core and the surface, it is possible to provide the three-dimensional characteristics that ensure the internal and external structure of the reinforcing bar and to have the differential characteristics that can simultaneously enhance tensile strength and adhesion strength.

[0049] The post-processing step is to wind, rewind, and cut the wire that has been impregnated in the second impregnation tank 220 to complete the final reinforcing rib. This is the same as the known process, so it is omitted from separate description.

[0050] As previously explained, the reinforcing rib manufacturing process of the present invention does not involve producing the reinforcing rib through a single impregnation process in one impregnation tank. Instead, it utilizes two impregnation tanks, referred to as the first and second impregnation tanks 210 and 220, to separate the core and surface of the reinforcing rib for a total of two impregnations. For this purpose, it is necessary not only to supply / distribute the prepared resin to the first and second impregnation tanks 210 and 220 respectively, but also to use technical means to differentiate the resin preparation and the curing agent contained in the resin in the first and second impregnation tanks 210 and 220. The resin preparation system of the present invention provides such technical means.

[0051] The specific structure and function of the resin blending system of the present invention will be described below.

[0052] Figure 2 This is a block diagram illustrating the general configuration of the system of the present invention.

[0053] from Figure 2 As can be seen from the above, the resin mixing system of the present invention basically includes a tank assembly, an impregnation tank assembly, and a conveying assembly.

[0054] The can assembly of the present invention plays an important role in storing, mixing and distributing resin in the manufacturing process of reinforcing ribs. Specifically, the can assembly consists of a storage tank 110, a mixing tank 120 and a dispensing tank 130.

[0055] The reason for making the tank assembly into three separate tanks (storage / mixing / distribution tanks) is to maximize the efficiency, quality management, and process flexibility of the reinforcing rib manufacturing process.

[0056] That is, the storage tank 110 prepares a sufficient amount of resin in advance, the mixing tank 120 optimizes the mixing operation, and the distribution tank 130 supplies the resin appropriately so that the core and surface molding of the reinforcing ribs can be carried out smoothly. In this way, each tank is responsible for a specialized function, so that the process can be carried out continuously without interruption.

[0057] In addition, after the resin and curing agent are fully mixed in the mixing tank 120, they are moved to the dispensing tank 130 and uniformly supplied to the impregnation tank, thereby improving the final quality of the reinforcing rib.

[0058] Furthermore, as needed, the resin in the storage tank 110 can be changed or a curing agent can be added in various proportions in the mixing tank 120. By using the dispensing tank 130, different resins can be used in the core and surface of the reinforcing rib, thereby providing a basis for manufacturing composite and high-performance reinforcing ribs.

[0059] Specifically, the storage tank 110 stores the resin to be bonded with glass fiber. The storage tank 110 provides the function of storing the resin as a raw material in preparation for stable use in the formulation process of subsequent processes.

[0060] That is, the storage tank 110 maintains a constant quality of resin and regulates the process of supplying a stable amount to the mixing tank 120, thereby providing a basis for ensuring continuous production processes.

[0061] The mixing tank 120 performs the function of preparing the optimal resin mixture required to manufacture reinforcing ribs by adding a thermosetting agent to the resin supplied from the storage tank 110. The mixing tank 120 includes a mixer (not shown) with multiple impellers or propellers, thereby enabling uniform mixing of the resin and the curing agent.

[0062] The resin used in this invention is combined with glass fiber as a reinforcing material, thereby providing an important function that determines the physical and chemical properties of the reinforcing rib. It also encapsulates the glass fiber, combining individual fibers into a strong structure and forming a protective film surrounding the glass fiber, thereby preventing the glass fiber from being damaged by external factors such as moisture, chemicals, abrasion, and impact.

[0063] In addition, together with glass fiber, it determines the strength, durability, elasticity, tensile strength of the composite material and absorbs and disperses impact energy, thus enabling the stiffener to resist external impacts or loads.

[0064] Furthermore, the combination of resin and glass fiber allows for the combination of lightweight composite materials that are much lighter than metals, flexibility in easy processing into desired shapes, and chemical and environmental resistance.

[0065] This type of resin is suitable for thermosetting resins but not thermoplastic resins because thermosetting resins have many characteristics. Specifically, thermosetting resins form a three-dimensional chemical bond during the curing process, thereby providing extremely high strength and durability. When combined with glass fiber, they exert a synergistic effect, thus maximizing the physical properties of the composite material, such as tensile strength and compressive strength. After curing, they not only guarantee the thermal stability of physical properties at high temperatures, but also guarantee chemical resistance. Furthermore, due to the irreversible curing process, which prevents melting or deformation after a single curing, permanent properties are guaranteed.

[0066] This type of thermosetting resin requires a thermosetting agent, which alone plays the role of triggering the curing reaction of thermosetting resins that are not easy to cure without special conditions. The thermosetting agent not only enhances the chemical bonding of the resin, but also improves the reactivity of the resin itself, and provides the function of enhancing the uniform curing of the resin as a whole.

[0067] In this invention, the curing agent, i.e. the thermosetting agent, can be a mixture of curing agents that can perform optimally in the range of high temperature, medium temperature and low temperature.

[0068] High-temperature curing agents exhibit optimal performance (curing reaction) above 80°C and are suitable for environments requiring high heat resistance and strength. For example, at least one of the following curing agents can be used: dicumyl peroxide (DCP), tert-Butyl peroxybenzoate (TBPB), and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane.

[0069] Medium-temperature curing agents exhibit optimal performance at temperatures between 40°C and 80°C and are suitable for compounds such as lauroyl peroxide (LPO), azobisisobutyronitrile (AIBN), and dibenzoyl peroxide (BPO).

[0070] Low-temperature curing agents exhibit optimal performance at temperatures between 30°C and 40°C and are suitable for applications such as methyl ethyl ketone peroxide (MEKP) and di(4-tert-butylcyclohexyl)peroxydicarbonate.

[0071] This thermosetting agent can be added at a ratio of 0.5 to 5 parts by weight based on 100 parts by weight of resin, and the high-temperature / medium-temperature / low-temperature curing agents are preferably mixed in a ratio of 1:2:1.

[0072] In terms of this ratio, although the high-temperature curing agent and the low-temperature curing agent work in high-temperature and low-temperature environments respectively, the medium-temperature curing agent covers a wide temperature range between these two extremes, thus relatively increasing the ingredient ratio. This is to adjust the curing speed to optimize the curing speed, so as to avoid curing occurring too quickly or too slowly throughout the process.

[0073] At this time, the temperature of mixing tank 120 needs to be maintained at a level where the low-temperature curing agent will not react, i.e., less than 30°C, in order to avoid curing reaction during mixing.

[0074] That is, the mixing tank 120 mixes the curing agent (thermosetting agent) and resin (thermosetting resin) well, thereby performing the core function of determining the strength and durability of the final product, i.e., the reinforcing rib. The unit in which the thermosetting agent is added to the mixing tank 120 is called the first addition unit 10.

[0075] This first feeding section 10 can be equipped with a metering pump and flow control valve mechanism that accurately feeds the thermosetting agent stored in the thermosetting agent tank into the resin; or an in-line mixer and injection nozzle mechanism that directly feeds the curing agent into the resin stream for mixing; or a batch mixer mechanism that feeds the thermosetting agent stored in the storage chamber multiple times in small amounts using a timer and sensing sensor that automatically adjusts the feeding time. That is, any of these mechanisms can be used, and these mechanisms can also be applied to the second feeding section, which will be described later.

[0076] The distribution tank 130 serves to distribute the resin to the dual impregnation tanks, namely the first and second impregnation tanks 210 and 220, after the resin has been temporarily stored in the mixing tank 120.

[0077] The reason for not dispensing resin directly from mixing tank 120 to the first and second impregnation tanks 210 and 220 is as follows: the mixed resin can be easily dispensed into the first and second impregnation tanks 210 and 220 in the required amount by each tank in dispensing tank 130, and the dispensing tank 130 plays an intermediate storage role between mixing tank 120 and the first and second impregnation tanks 210 and 220, thus allowing the mixing process and impregnation process to be carried out independently and the speed and timing of each process to be flexibly adjusted.

[0078] In addition, when the resin is directly supplied from the mixing tank 120 to the first and second impregnation tanks 210 and 220, the quality of the resin sent to the first and second impregnation tanks 210 and 220 may vary depending on the mixing state or mixing speed in the mixing tank 120. The distribution tank 130 will buffer it and control the viscosity and other physical properties of the resin, so that the quality of the resin sent to the first and second impregnation tanks 210 and 220 remains uniform, and the reaction between the thermosetting agent and the resin proceeds in a certain manner. Thus, it can also have the ability to manage the curing reaction so that the corresponding resin is in the best state when it arrives at the first and second impregnation tanks 210 and 220.

[0079] Furthermore, the distribution tank 130 allows for the continuous supply of resin to the first and second impregnation tanks 210 and 220 during the resin preparation process in the mixing tank 120. This ensures both the continuity of production and the ability to accurately adjust the necessary amount and timing when supplying resin to the first and second impregnation tanks 210 and 220 via the distribution tank 130.

[0080] Furthermore, such as Figure 2 As shown, multiple distribution tanks 130 are preferably configured.

[0081] Specifically, if multiple distribution tanks 130 are configured, each production line can operate independently, thereby enabling parallel operations where preparation or replenishment work can be carried out in one tank while resin is being supplied in another. Furthermore, while one tank is being emptied for cleaning, work can continue in another tank. This not only minimizes operational interruptions but also allows for the preparation and supply of larger quantities of resin, thus providing the advantage of being able to manufacture large-scale reinforcing ribs.

[0082] The impregnation tank assembly of the present invention receives resin supplied by the dispensing tank 130 for bonding resin to glass fiber or core wire. As previously described, the impregnation tank assembly includes: a first impregnation tank 210 for storing resin for molding the core of the reinforcing rib; and a second impregnation tank 220 for storing resin for molding the surface of the reinforcing rib that has been molded in the first impregnation tank 210.

[0083] The significance and function of the first and second impregnation tanks 210 and 220 have been explained in the reinforcing rib manufacturing process, so the explanation will not be repeated.

[0084] The conveying assembly of the present invention includes a number of facilities for conveying resin between tanks or impregnation tank assemblies, and includes first, second, and third conveying sections 310, 320, and 330 corresponding to the number of the three tanks and impregnation tank assemblies previously described.

[0085] The first conveying unit 310 is responsible for all the structures and functions of conveying the resin stored in the storage tank 110 to the mixing tank 120, and it basically includes a pump, pipes, valves, a sensor unit and a first control unit.

[0086] The pump is the power source that moves the resin from the storage tank 110 to the mixing tank 120. The pipeline is the pipeline connecting the storage tank 110 and the mixing tank 120. The valve provides the function of controlling the flow of resin and can be disconnected when necessary. The sensor unit includes a flow sensor, a pressure sensor, and a temperature sensor, and monitors the amount, temperature, and pressure of the resin delivered by the pump in real time, thereby providing an accurate amount of resin that can be delivered to the mixing tank 120.

[0087] When the resin is transported from the storage tank 110 to the mixing tank 120, the first control unit adjusts the resin transport speed, flow rate, pressure, temperature, etc. in real time through the sensor values ​​of the sensor unit mentioned above, thereby performing the function of optimizing the resin transport.

[0088] The second delivery unit 320 provides all the construction and functions for delivering the resin prepared in the mixing tank 120 to the dispensing tank 130. As the first delivery unit 310 described earlier, it includes a pump, pipes, valves, a sensor unit, and a second control unit. Their functions are the same or similar to the detailed construction of the first delivery unit 310 described above, only the names are different.

[0089] In particular, in the configuration of multiple dispensing tanks 130, the second conveying unit 320 is equipped with a distribution manifold, which can perform the function of accurately dispensing the resin from the mixing tank 120 into the multiple dispensing tanks 130.

[0090] The third conveying unit 330 is responsible for all the structures and functions of conveying the resin from the dispensing tank 130 to the first and second impregnation tanks 210 and 220. It also includes pumps, pipes, valves, sensor units, and a third control unit, whose functions are the same as or similar to the detailed configurations of the first and second conveying units 310 and 320 described above.

[0091] In particular, when multiple dispensing tanks 130 are configured, a function may be included to control the delivery of resin to the first and second impregnation tanks 210 and 220 by opening the valve provided in the dispensing tank 130 after a specific dispensing tank 130 is selected by the third control unit.

[0092] In summary, the system of the present invention, in the reinforcing rib manufacturing process based on a dual impregnation tank, effectively distributes resin through multiple tanks and a conveying section to mold the core and surface of the reinforcing rib with optimized resin, thereby providing properties that maximize the physical properties and consistency of the reinforcing rib.

[0093] Figure 3 This is a conceptual diagram illustrating the end of the main pipe on the side of the second impregnation tank.

[0094] from Figure 2 As can be seen, after the core yarn is formed by impregnating the first coarse yarn in the first impregnation tank 210, the core yarn is then impregnated in the second impregnation tank 220. Due to this characteristic, preferably, the first impregnation tank 210 is positioned closer to the dispensing tank 130 than the second impregnation tank 220.

[0095] At this time, regarding the configuration of the third conveying unit 330, the pipes connecting the distribution tank 130 to the first and second impregnation tanks 210 and 220 are preferably composed of a main pipe 331 and a branch pipe 332, rather than pipes that branch from the distribution tank 130 to the first and second impregnation tanks 210 and 220 respectively.

[0096] Specifically, the main pipeline 331 extends from the distribution tank 130 to... Figure 3 The piping of the second impregnation tank 220 shown in the figure has a branch pipe 332 which is a branch pipe from one side of the main pipe 331 to the first impregnation tank 210.

[0097] That is, resin that moves along the main pipe 331 is first supplied to the first impregnation tank 210 via the branch pipe 332, and then moves to the end of the main pipe 331. Figure 3 The structure that is ultimately supplied to the second impregnation tank 220 as shown.

[0098] In this way, if the resin moves along the main pipe 331 and a portion of the resin is distributed to the first impregnation tank 210 through the branch pipe 332, the pressure and flow rate of the main pipe 331 are naturally regulated. Then, when the resin that has reached the end of the main pipe 331 moves to the second impregnation tank 220, it can be transmitted to the second impregnation tank 220 in a state where the pressure and flow rate are stabilized. This allows the resin flow to be maintained more consistently and an appropriate amount of resin to be stably supplied to the first and second impregnation tanks 210 and 220.

[0099] Furthermore, after stabilizing the flow rate and pressure of the resin in the first stage of supplying it to the first impregnation tank 210, the flow rate and pressure can be adjusted separately in the second stage while supplying it to the second impregnation tank 220. This not only allows for more precise management of the resin flow but also has the advantages of minimizing resin waste and accurately using the required amount.

[0100] Furthermore, the resin is first supplied to the first impregnation tank 210, and then the remaining resin is supplied to the second impregnation tank 220. Therefore, although it will be described later, it provides the characteristic of being able to manage the mixing state of the resin or the reaction state with the curing agent separately at each stage.

[0101] Figure 4 This is a conceptual diagram illustrating the second input section and the mixer.

[0102] Furthermore, from Figure 4 As can be seen from the above, the third conveying unit 330 may include a second input unit 20, which is located at a location after the branch pipe 332 from the main pipe 331 mentioned above, and inputs the UV curing agent into the resin conveyed to the second impregnation tank 220.

[0103] This is equivalent to taking full advantage of the previously explained construction using the main pipe 331 and the branch pipe 332 to specialize the detailed composition of the resin supplied to the second impregnation tank 220, providing the characteristic of optimizing the application of special curing agents while regulating the curing reaction in stages.

[0104] UV curing agent is a formulation that absorbs ultraviolet (UV) light to trigger a chemical reaction and rapidly cure the resin suitable for this invention.

[0105] This UV curing agent is mainly composed of a photoinitiator and reactive monomers or oligomers. When exposed to ultraviolet light, the photoinitiator is activated, resulting in a curing reaction that forms a polymer network. UV curing agents begin to cure almost immediately upon exposure to ultraviolet light, giving the cured layer high hardness, durability, chemical resistance, and weather resistance.

[0106] Furthermore, UV curing is primarily triggered by ultraviolet light, so it requires little or no heat to cure and minimizes the emission of volatile organic compounds (VOCs), supporting environmentally friendly manufacturing processes.

[0107] That is, in this invention, the first impregnation tank 210 serves as the core of the reinforcing rib, so the core molding does not require a UV curing agent. Therefore, the UV curing agent is only added to the resin delivered to the second impregnation tank 220 that forms the surface of the reinforcing rib, and not to the resin going to the first impregnation tank 210, thereby providing optimized curing agent utilization that allows the UV curing agent to be accurately applied to where necessary.

[0108] In other words, it provides units and processes that optimize the curing of the core and surface of the reinforcing rib to maximize the performance of the reinforcing rib, thereby not only optimizing the amount of curing agent used to reduce costs, but also ensuring a uniform curing state on the outer surface of the reinforcing rib.

[0109] At this point, the curing agent suitable for the present invention can be modified by setting the previously described thermosetting agent ratio to a ratio of high-temperature curing agent: medium-temperature curing agent: low-temperature curing agent: UV curing agent = 1:2:1:1 to 5, and the UV curing agent can be any of the following curing agents: alpha-hydroxy ketone, phenyl glycolate, alpha-amino ketone, benzyl dimethyl ketal, or phosphine oxide.

[0110] In addition, although the second input unit 20 is not specifically illustrated in the accompanying drawings, it may include a storage tank for storing UV curing agent, an injection nozzle for injecting UV curing agent into the corresponding location, a metering pump for metering the UV curing agent from the storage tank to the injection nozzle, a flow control valve for finely adjusting the input amount of UV curing agent, and an input control unit for real-time monitoring of resin flow rate, curing agent input amount, mixing state, etc., and automatically performing necessary adjustments.

[0111] Furthermore, such as Figure 4As shown, the third delivery section 330 may further include a mixer 30 at a location downstream of the pipeline where the second input section 20 is provided. The mixer 30 mixes the UV curing agent input from the second input section 20 and the resin flowing along the main pipeline 331 by means of a propeller.

[0112] This mixer 30 can be installed in a separate pipeline that detours through the main pipeline 331 or at the aforementioned location within the main pipeline 331, in a manner that includes a propeller, a motor, and a mixing control unit.

[0113] The motor is the power source for the rotating propeller. The propeller is a structure made of stainless steel or other chemically resistant materials that uses the motor's power to rotate and uniformly mix resin and UV curing agent. The mixing control unit performs the function of controlling the motor's drive and rotation speed.

[0114] The main pipe 331 of the mixer 30 can be set at a location with a larger diameter than other parts to minimize flow resistance while ensuring the rotation radius of the propeller, and to reduce pressure loss from the second input section 20 and the mixer 30 while ensuring effective mixing.

[0115] This mixer 30 can uniformly mix the resin and UV curing agent, thereby providing properties that can significantly improve the consistency of the curing reaction and the surface quality of the reinforcing ribs.

[0116] Figure 5 This is a conceptual diagram illustrating a mixer controlled by sensing a first viscosity sensor and a flow sensor located in the pipe behind the second input section.

[0117] Reference Figure 5 It can be seen that the third conveying unit 330 further includes a first viscosity sensor 41 and a flow sensor 50 at a location behind the main pipeline 331 where the second input unit 20 is located.

[0118] Correspondingly, the mixer 30 can provide the function of controlling the propeller rotation speed differentially based on the viscosity measured by the first viscosity sensor 41 and the flow rate measured by the flow sensor 50.

[0119] For example, if the first viscosity sensor 41 senses an increase in the viscosity of the resin, the mixer 30 (specifically the mixing control unit) increases the rotation speed of the propeller to apply a stronger mixing force so that the high-viscosity resin and the UV curing agent are mixed evenly.

[0120] In addition, if the flow sensor 50 detects a decrease in resin flow, the mixer 30 reduces the rotation speed of the propeller to adjust the mixing intensity, thereby preventing over-mixing and ensuring that the resin and UV curing agent are mixed evenly. If the viscosity and flow rate of the resin are both low, the mixer 30 optimizes the rotation speed of the propeller to reduce unnecessary energy consumption and maintain a uniform mixture of the resin and UV curing agent.

[0121] In this way, the rotational speed of the propeller set in the mixer 30 is controlled differentially based on the data / sensor values ​​of the first viscosity sensor 41 and the flow sensor 50, thereby optimizing the mixing of resin and UV curing agent in real time and achieving the characteristics of simultaneously improving process stability, the final quality of reinforcing ribs, and energy efficiency.

[0122] Figure 6 This is a conceptual diagram illustrating a structure in which multiple second input units are arranged at certain intervals along the length of the main pipeline.

[0123] from Figure 6 As can be seen from the above, multiple second input sections 20 can be set at certain intervals along the direction toward the second impregnation tank 220 from a location behind the point where the main pipe 331 branches into a branch pipe 332.

[0124] If multiple second input sections 20 are set up in this way, the UV curing agent is added to the resin in stages, so that the curing agent can be evenly distributed in the resin. This allows the curing agent to be uniformly mixed throughout the flow of the resin, thus improving the consistency of the curing reaction.

[0125] Furthermore, the UV curing agent is injected in 20 stages through multiple second injection points, which allows the mixing process of the resin and UV curing agent to be carried out more efficiently.

[0126] In addition, the amount of UV curing agent injected through each second injection section 20 can be adjusted individually, thereby increasing the flexibility of the process to optimize the injection of UV curing agent according to the flow rate or viscosity of the resin.

[0127] Furthermore, by injecting UV curing agent at numerous locations through multiple second injection points 20, the curing reaction can be controlled more precisely, especially for UV curing agents that undergo rapid curing reactions, thus providing the advantage of being able to properly disperse and adjust the reaction rate.

[0128] This enhances the uniform mixing of the UV curing agent and resin, thus improving the overall system stability of the present invention, including flexibility in process control and optimization of the curing reaction.

[0129] In addition, a second viscosity sensor 42 can be provided around each of the plurality of second input units 20.

[0130] Correspondingly, the second input unit 20 can adjust the input amount of the UV curable agent according to the value of each second viscosity sensor 42.

[0131] For example, assuming that three second input units A, B, and C are provided at regular intervals, when the viscosity value sensed by the second viscosity sensor 42 on the side of the second input unit A is within the normal range, the second input unit A inputs the set basic amount of the UV curable agent into the resin.

[0132] After the resin passes through the second input unit A, if the second viscosity sensor 42 on the side of the second input unit B senses a slight increase in viscosity, the second input unit B can increase the input amount of the UV curable agent by 10% based on this to adjust the mixing ratio of the resin and the UV curable agent.

[0133] After the resin passes through the second input unit B, when the second viscosity sensor 42 on the side of the second input unit C senses a greater change in viscosity, that is, the viscosity of the resin increases by 15% more than expected, the second input unit C can increase the input amount of the UV curable agent by 20% to maintain the best mixing.

[0134] Accordingly, each second input unit 20 can separately adjust the amount of the UV curable agent according to the state of the resin, thereby ensuring an environment for the best curing reaction even if the resin experiences various conditions during the mixing process, and endowing the characteristics of further enhancing the uniformity of the curing quality on the surface of the reinforcing rib.

[0135] Furthermore, a temperature sensor 60 can be further provided around each of the plurality of second input units 20.

[0136] Correspondingly, the second input unit 20 can further adjust the input amount of the UV curable agent adjusted by the second viscosity sensor 42 according to the value of the temperature sensor 60 using the following mathematical formula 1.

[0137] Mathematical formula 1:

[0138] Q(T) = Q0 × [1 + c × tanh(b × (T0 - T)]]

[0139] Where, Q(T) is the final input amount of the UV curable agent adjusted at temperature T, Q0 is the initial input amount of the UV curable agent adjusted according to the viscosity sensor value, T is the current temperature measured by the temperature sensor, c is the sensitivity of the input amount adjustment according to the temperature change (0 < c ≤ 1, if c = 0.1, the sensitivity is low, if c = 1, the sensitivity is high), b is the adjustment constant for adjusting the sharpness of the temperature change (the larger the b value, the more rapid the change in the input amount of the UV curable agent), and T0 is the reference temperature.

[0140] Formula 1, based on the characteristics of the hyperbolic tangent function, exhibits nonlinear properties where the adjustment amount changes little with small temperature changes but changes drastically with large temperature changes. Therefore, it provides the characteristic that the amount of UV curing agent added can be finely adjusted with temperature.

[0141] In other words, mathematical formula 1 nonlinearly reflects the effect of temperature on the physical properties of the resin and adjusts it so that the curing reaction always takes place under optimal conditions.

[0142] This can be illustrated as follows: When the current temperature is 20℃, which is 25℃ lower than the baseline temperature, and c is 0.2, b is 0.1, and the initial input is set to 100 (units), according to mathematical formula 1, then...

[0143] Q(20)=100×[1+0.2×tanh(0.1×(25-20)]=109.24

[0144] That is, since the current temperature is lower than the reference temperature, in order to promote the curing reaction, the amount of UC curing agent added can be adjusted to be increased by 9.24 compared with the initial calculation of 100.

[0145] That is, according to mathematical formula 1, in a nonlinear manner, if the temperature decreases, the amount of UV curing agent added is increased, and if the temperature increases, the amount added is decreased, thereby providing characteristics that optimize the curing reaction.

[0146] As explained above, although the structure and function of the resin mixing system for glass fiber reinforced ribs based on the double impregnation tank according to the present invention have been described in the above description and drawings, this is merely an example. Therefore, the concept of the present invention is not limited to the above description and drawings. Of course, various changes and modifications can be made without departing from the technical concept of the present invention.

Claims

1. A resin mixing system, which is a resin mixing system for glass fiber reinforced ribs based on a double impregnation tank, characterized in that, include: A tank assembly comprising: a storage tank for storing resin bonded to glass fibers; a mixing tank for mixing the resin using a mixer while including a first feeding section for adding a thermosetting agent; and a dispensing tank for receiving the dispensed resin. An impregnation tank assembly receiving resin from the dispensing tank and including a first impregnation tank for molding the core of a reinforcing rib; the impregnation tank assembly further including a second impregnation tank for molding the surface of the reinforcing rib whose core has been molded in the first impregnation tank; and The conveying assembly includes a first conveying section for conveying resin stored in the storage tank to the mixing tank, a second conveying section for conveying resin mixed in the mixing tank to the dispensing tank, and a third conveying section for conveying resin from the dispensing tank to the first impregnation tank and the second impregnation tank.

2. The resin preparation system according to claim 1, characterized in that, The first impregnation tank is configured to be closer to the dispensing tank than the second impregnation tank. The pipeline connecting the third conveying section from the distribution tank to the first impregnation tank and the second impregnation tank includes: a main pipeline connecting the distribution tank and the second impregnation tank; and a branch pipeline branching from one side of the main pipeline to the first impregnation tank.

3. The resin blending system according to claim 2, characterized in that, The aforementioned third conveying unit includes a second input unit, which is located at a point behind the branch point where the main pipe branches into a branch pipe and inputs UV curing agent into the resin being conveyed to the aforementioned second impregnation tank.

4. The resin blending system according to claim 3, characterized in that, The aforementioned third conveying unit includes a mixer at a location downstream of the main pipeline where the aforementioned second input unit is located, which uses a propeller to mix the aforementioned resin and the aforementioned UV curing agent.

5. The resin blending system according to claim 4, characterized in that, The aforementioned third conveying unit includes a first viscosity sensor and a flow sensor at a location downstream of the main pipeline where the aforementioned second input unit is located. The mixer differentially controls the rotational speed of the propeller based on the viscosity measured by the first viscosity sensor and the flow rate measured by the flow sensor.

6. The resin blending system according to claim 3, characterized in that, At a location behind the branch point where the main pipeline branches into a branch pipeline, multiple second input points are installed at certain intervals along the direction toward the second impregnation tank.

7. The resin blending system according to claim 6, characterized in that, A second viscosity sensor is installed around each of the aforementioned second input sections. The second input unit adjusts the amount of UV curing agent added based on the value of the second viscosity sensor.

8. The resin blending system according to claim 7, characterized in that, Temperature sensors are further installed around each of the aforementioned second input sections. The second input unit further adjusts the amount of UV curing agent added based on the value of the temperature sensor using the following mathematical formula 1. Mathematical formula 1: Q(T) = Q0 × [1 + c × tanh(b × (T0 - T))] Where, Q(T) is the final input amount of the UV curable agent adjusted at temperature T, Q0 is the initial input amount of the UV curable agent adjusted according to the viscosity sensor value, T is the current temperature measured by the temperature sensor, c is the sensitivity of the input amount adjustment according to the temperature change, where 0 < c ≤ 1. If c = 0.1, the sensitivity is low. If c = 1, the sensitivity is high. b is the adjustment constant for adjusting the sharpness of the temperature change. The larger the b value, the more sharply the input amount of the UV curable agent changes. T0 is the reference temperature.

Images