Thermosetting Two-component resin automatic feeding system

Abstract

The present invention relates to an automatic supply system for thermosetting two-component resins, and more specifically, a floating level sensor is attached to each of a plurality of resin tanks. When the resin in the tank is consumed, the thermosetting two-component resin is automatically supplied only to the tank that has consumed the resin according to the level set by the floating level sensor. When the resin reaches the level of the set floating level sensor, the supply stops. This eliminates the need for an operator to monitor the resin tanks individually or to manually supply the resin, thereby reducing manpower and working time. Furthermore, it prevents contamination of the workplace during the conventional mixing and resin transportation processes, resulting in improved working environment and efficiency.

Description

Technology Field

[0001] The present invention relates to an automatic supply system for thermosetting two-component resins, and more specifically, to a system in which a floating level sensor is attached to each of a plurality of resin tanks, and when the resin in the tank is consumed, the thermosetting two-component resin is automatically supplied only to the tank that has consumed the resin according to the level set by the floating level sensor, and the supply stops when the resin reaches the level set by the floating level sensor, thereby reducing manpower and working time by eliminating the need for an operator to monitor the resin tanks individually or supply the resin manually, and increasing the working environment and efficiency by preventing contamination of the workplace during the existing stirring and resin transportation processes. Background Technology

[0003] Pultrusion is a method used to manufacture continuous fiber-reinforced linear composites in which fibers are bonded to various matrix polymers. Typically, it is carried out by a mixed-component open-reactor method using a thermosetting resin system having a gelation time ranging from several hours to several days at room temperature. In this method, continuous fibers are immersed in an open liquid resin impregnation tank, then stretched through a heated die, and cured. The cured composite material is then drawn from the die by a mechanical drawing device and cut to a desired length by a flying saw.

[0004] In addition to such open impregnation bath methods, closed mixed-component (main / hardener) liquid resin injection die methods are also used in the pultrusion industry. In these methods, the mixed liquid resin is injected directly onto reinforcing fibers through a closed die and then stretched and cured through a heated die. Currently, it is estimated that over 90% of the pultrusion industry utilizes the open liquid resin impregnation bath method, which is generally the most economical method for manufacturing pultrusion-formed fiber-reinforced composites. Most thermosetting resin systems used in the pultrusion industry utilize monomers, such as styrene or methyl methacrylate (MMA), as solutions in unsaturated resins. The monomers reduce the viscosity of the resin and facilitate the impregnation of fibers within the open impregnation bath. However, due to strict environmental concerns (e.g., styrene and MMA emissions and other health hazards), the closed injection pultrusion method is gaining attention and being considered as an alternative to the open impregnation bath method. However, in order to use the closed injection die method, the resin injection device, the distribution mechanism, and the internal structure of the die must be modified for a conventional pultrusion setup. These modifications to the closed injection die can also be effective in resolving monomer release and odor problems in the case of conventional styrene or MMA-based thermosetting systems.

[0005] The resins used in the open impregnation bath and injection die method of pultrusion molding are thermosetting resins, such as unsaturated polyester, vinyl ester, epoxy, polyurethane, phenolic resin, etc.

[0006] However, among these, polyurethane resin has a very short pot life, making it impossible to produce using open-type resin tanks. The purpose of applying the above technology is to form a system that leverages the advantages of both open and closed types while compensating for their disadvantages, thereby creating convenience for workers, environmentally friendly working conditions, and consistently maintaining product performance characteristics. Prior art literature

[0008] Republic of Korea Published Patent Application No. 10-2003-0029825 The problem to be solved

[0009] The present invention has been devised to resolve the aforementioned conventional problems, and,

[0010] The purpose is to provide an automatic supply system for thermosetting two-component resin, in which floating level sensors are attached to each of multiple resin tanks, so that when the resin in the tank is consumed, thermosetting two-component resin is automatically supplied only to the tank that has consumed resin according to the level set by the floating level sensor, and the supply stops when the resin reaches the level set by the floating level sensor, thereby reducing labor and working time by eliminating the need for an operator to monitor each tank individually or supply resin manually, and by preventing contamination of the workplace during the conventional stirring and resin transportation processes. means of solving the problem

[0012] To achieve the above objective, the present invention relates to a system for automatically supplying a thermosetting two-component resin to a plurality of resin tanks in a pultrusion process, wherein

[0013] A main component storage tank in which the main component of the above-mentioned thermosetting two-component resin is stored;

[0014] A curing agent storage tank in which the curing agent of the above-mentioned thermosetting two-component resin is stored;

[0015] A metering pump connected to the main material storage tank and the hardener storage tank, respectively, for transferring the main material or hardener according to a set amount;

[0016] A mixing unit that mixes the main material and the hardener transferred from the above-mentioned multiple metering pumps and supplies them to a resin tank;

[0017] A branching unit connected to the above mixing unit, which branches and supplies the two-component resin mixed in the mixing unit to each of a plurality of resin tanks;

[0018] The present invention relates to an automatic supply system for thermosetting two-component resins characterized by being composed of the following:

[0019] In addition, the branching section of the present invention comprises a main pipe through which a thermosetting two-component resin, mixed and supplied in the mixing section, is conveyed;

[0020] A plurality of branch pipes, each branched from the main pipe and connected to a plurality of resin tanks, and each supplying a thermosetting two-component resin transferred through the main pipe to a plurality of resin tanks;

[0021] The present invention relates to an automatic supply system for a thermosetting two-component resin, characterized by comprising pneumatic switches installed in each of the aforementioned multiple branch pipes to open and close the thermosetting two-component resin being transported inside.

[0022] In addition, the present invention relates to an automatic supply system for thermosetting two-component resin, characterized in that a floating level sensor is installed in each of the multiple resin tanks to detect the level of the thermosetting two-component resin filled inside the resin tank, and when the level of the thermosetting two-component resin is below the level set by the floating level sensor, the mixing unit and multiple pneumatic switches are opened to supply the thermosetting two-component resin to the resin tank.

[0023] In addition, the present invention relates to an automatic supply system for thermosetting two-component resins, characterized in that the mixing section of the present invention is connected to a branching section and a washing section for washing the thermosetting two-component resin injected into the interior of the mixing section.

[0024] In addition, the cleaning unit of the present invention comprises: a cleaning agent storage tank in which a cleaning agent is stored internally and which transfers the stored cleaning agent by a cleaning agent pump;

[0025] A detergent transfer pipe connected between the detergent pump and the mixing unit to transfer the detergent transferred by the detergent pump to the mixing unit;

[0026] An air pressure transfer pipe branched off from one end of the above-mentioned cleaning agent transfer pipe to deliver high-pressure air to a mixing section;

[0027] A high-pressure air generator connected to the above-mentioned air pressure transfer pipe to generate high-pressure air and transfer it to the mixing section through the air pressure transfer pipe;

[0028] The present invention relates to an automatic supply system for thermosetting two-component resins, characterized by comprising: a three-way ball valve formed between the air pressure transfer pipe and the detergent transfer pipe, which opens and closes the interior to selectively transfer the detergent from the detergent storage tank or the high-pressure air from the high-pressure air generator to the mixing section. Effects of the invention

[0030] As described above, the automatic supply system for thermosetting two-component resin according to the present invention is equipped with floating level sensors in each of the multiple resin tanks. When the resin in the tank is consumed, the thermosetting two-component resin is automatically supplied only to the tank that has consumed the resin according to the level set by the floating level sensor. When the resin reaches the level of the set floating level sensor, the supply stops. Consequently, the operator does not need to monitor the resin tanks individually or supply the resin manually, thereby reducing manpower and working time. Furthermore, by preventing contamination of the workplace during the conventional mixing and resin transportation processes, the system has the effect of improving the working environment and increasing efficiency. Brief explanation of the drawing

[0032] FIG. 1 is a schematic diagram showing an automatic supply system for a thermosetting two-component resin according to one embodiment of the present invention, and FIG. 2 is a schematic diagram showing a large material tank connected to a main component storage tank or a curing agent storage tank according to one embodiment of the present invention. Specific details for implementing the invention

[0033] The present invention having such characteristics may be explained more clearly through preferred embodiments thereof.

[0034] Before describing various embodiments of the present invention in detail with reference to the attached drawings, it will be understood that the application is not limited to the details of the configuration and arrangement of components described in the following detailed description or illustrated in the drawings. The present invention may be embodied and practiced in other embodiments and may be carried out in various ways. Furthermore, it will be understood that expressions and terms used herein regarding device or element orientations (e.g., "front," "back," "up," "down," "top," "bottom," "left," "right," "lateral") are used merely to simplify the description of the present invention and do not indicate or imply that the related device or element must simply have a specific orientation. Additionally, terms such as "first" and "second" are used in this and the appended claims for illustrative purposes and are not intended to indicate or imply relative importance or intent.

[0035] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0036] FIG. 1 is a schematic diagram showing an automatic supply system for a thermosetting two-component resin according to one embodiment of the present invention, and FIG. 2 is a schematic diagram showing a large material tank connected to a main component storage tank or a curing agent storage tank according to one embodiment of the present invention.

[0037] As illustrated in FIGS. 1 and 2, the thermosetting two-component resin automatic supply system of the present invention is a system for automatically supplying thermosetting two-component resin to a plurality of resin tanks in a pultrusion process, comprising: a main component storage tank (100) in which the main component of the thermosetting two-component resin is stored; a curing agent storage tank (200) in which the curing agent of the thermosetting two-component resin is stored; a metering pump (300) connected to the main component storage tank (100) and the curing agent storage tank (200), respectively, to transfer the main component or the curing agent according to a set amount; and a mixing unit (400) that mixes the main component and the curing agent transferred from the plurality of metering pumps (300) and supplies them to the resin tank (10). It is composed of a branching unit (500) connected to the above mixing unit (400) and branching and supplying the two-component resin mixed in the mixing unit (400) to each of the multiple resin tanks (10).

[0038] Here, the main component storage tank (100) stores additives such as a coloring agent, a release agent, and an accelerator mixed with the main resin, and the curing agent storage tank (200) stores a curing agent consisting only of a curing agent.

[0039] In addition, since the main component storage tank (100) and the curing agent storage tank (200) are small in size and require frequent and cumbersome refilling of new materials when consumption is high, as shown in FIG. 2, a large material tank (800) is installed separately on the outside of each and connected, and a separate level sensor (110, 210) is attached to the main component storage tank (100) and the curing agent storage tank (200) so that the main component mixture or curing agent of the large material tank (800) is automatically delivered. At this time, the level is set to 30~70 volume% by the level sensor (110, 210) inside the main component storage tank (100) or the curing agent storage tank (200), and is programmed so that when the internal main component mixture or curing agent reaches 30 volume%, the main component mixture or curing agent of the large material tank (800) is supplied to the main component storage tank (100) or the curing agent storage tank (200).

[0040] In addition, as shown in FIG. 2, an input window (810) for introducing additives is installed on the side of the large material tank (800), and the large material tank (800) is provided with the functions of stirring / circulation / heating (insulation). At this time, the large material tank (800) has a capacity of 1 to 2 tons.

[0042] As shown in FIG. 1, the branching section (500) is composed of: a main pipe (510) through which a thermosetting two-component resin, mixed and supplied from the mixing section (400), is transported; a plurality of branch pipes (520) each branched from the main pipe (510) and connected to a plurality of resin tanks (10), and each supplying the thermosetting two-component resin transported through the main pipe (510) to the plurality of resin tanks (10); and pneumatic switches (530) each installed in the plurality of branch pipes (520) to open and close the thermosetting two-component resin transported inside.

[0044] As shown in FIGS. 1 and 2, a floating level sensor (700) for detecting the level of a thermosetting two-component resin filled inside the resin tank (10) is installed in each of the above multiple resin tanks (10). When the level of the thermosetting two-component resin is below the level set by the floating level sensor (700), the metering pump (300), the mixing unit (400), and the multiple pneumatic switches (530) are opened to supply the thermosetting two-component resin to the resin tank (10). Conversely, when the thermosetting two-component resin reaches the set level position, the pneumatic switches (530) and the mixing unit (400) are closed.

[0046] As illustrated in FIG. 1, the mixing section (400) is connected to a washing section (600) that washes a thermosetting two-component resin injected into the mixing section (400) and the branching section (500); the washing section (600) has a washing agent stored inside and a washing agent storage tank (610) that transfers the stored washing agent by a washing agent pump (611); a washing agent transfer pipe (620) connected between the washing agent pump (611) and the mixing section (400) to transfer the washing agent transferred by the washing agent pump (611) to the mixing section (400); and an air pressure transfer pipe (630) branched off from one end of the washing agent transfer pipe (620) to transfer high-pressure air to the mixing section (400). It is composed of: a high-pressure air generator (640) connected to the air pressure transfer pipe (630) to generate high-pressure air and transfer it to the mixing section through the air pressure transfer pipe (630); and a three-way ball valve (650) formed between the air pressure transfer pipe (630) and the cleaning agent transfer pipe (620) to open and close its interior to selectively transfer the cleaning agent from the cleaning agent storage tank (610) or the high-pressure air from the high-pressure air generator (640) to the mixing section (400).

[0047] That is, the above-mentioned three-way ball valve (650) is formed as a manual valve or an electronic valve to open and close the cleaning agent transfer pipe (620) and the air pressure transfer pipe (630) to deliver the cleaning agent or high-pressure air to the mixing unit (400). At this time, the cleaning agent or high-pressure air delivered to the mixing unit (400) cleans up to the main pipe (510) and branch pipe (520) of the mixing unit (400) and the branch unit (500), and is formed in a manner in which the cleaning agent cleans up the cleaning agent inside and then cleans it thoroughly with high-pressure air, or in a manner in which cleaning is performed by dividing it into cleaning with the cleaning agent or cleaning with high-pressure air.

[0049] Although the invention has been described with reference to the embodiments above, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as set forth in the following claims. Furthermore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the invention, and all technical spirits within the scope of the following claims and equivalents should be interpreted as being included within the scope of the rights of the present invention. Explanation of the symbols

[0051] 100 : Resident Department storage tank 200 : Hardener storage tank 110,210 : Level sensor 300 : Metering pump 400 : Mixing section 500 : Branch 510 : Main Hall 520 : Branch 530 : Pneumatic switch 600 : Washing section 610 : Detergent storage tank 611: Cleaning agent pump 620: Detergent transfer pipe 630: Pneumatic transfer pipe 640 : High-pressure air generator 650 : 3-way ball valve 700: Floating level sensor 800: Large material tank 810 : Input window

Claims

Claim 1 A thermosetting two-component resin automatic supply system comprising: a main component storage tank (100) in which the main component of the thermosetting two-component resin is stored; a curing agent storage tank (200) in which the curing agent of the thermosetting two-component resin is stored; a metering pump (300) connected to the main component storage tank (100) and the curing agent storage tank (200) respectively to transfer the main component or the curing agent according to a set amount; a mixing unit (400) that mixes the main component and the curing agent transferred from the multiple metering pumps (300) and supplies them to the resin tanks (10); and a branching unit (500) connected to the mixing unit (400) to branch and supply the two-component resin mixed in the mixing unit (400) to each of the multiple resin tanks (10). Claim 2 In claim 1, the branching section (500) comprises: a main pipe (510) through which a thermosetting two-component resin mixed and supplied from the mixing section (400) is transported; a plurality of branch pipes (520) each branched from the main pipe (510) and connected to a plurality of resin tanks (10), and each supplying the thermosetting two-component resin transported through the main pipe (510) to the plurality of resin tanks; and a pneumatic switch (530) each installed in the plurality of branch pipes (520) to open and close the thermosetting two-component resin transported inside. This characterizes the thermosetting two-component resin automatic supply system. Claim 3 In claim 2, a floating level sensor (700) for detecting the level of a thermosetting two-component resin filled inside the resin tank (10) is installed in each of the plurality of resin tanks (10), and if the level of the thermosetting two-component resin is below the level set by the floating level sensor (700), the mixing unit (400) and the plurality of pneumatic switches (530) are opened to supply the thermosetting two-component resin to the resin tank (10), characterized by an automatic supply system for thermosetting two-component resin. Claim 4 A thermosetting two-component resin automatic supply system according to claim 2, characterized in that the mixing section (400) is connected to a branching section (500) and a washing section (600) for washing the thermosetting two-component resin injected into the interior of the mixing section (400). Claim 5 In claim 4, the cleaning unit (600) comprises: a cleaning agent storage tank (610) in which a cleaning agent is stored internally and which transfers the stored cleaning agent by a cleaning agent pump (611); a cleaning agent transfer pipe (620) connected between the cleaning agent pump (611) and the mixing unit (400) to transfer the cleaning agent transferred by the cleaning agent pump (611) to the mixing unit (400); an air pressure transfer pipe (630) branched off from one end of the cleaning agent transfer pipe (620) to transfer high-pressure air to the mixing unit (400); a high-pressure air generator (640) connected to the air pressure transfer pipe (630) to generate high-pressure air and transfer it to the mixing unit (400) through the air pressure transfer pipe (630); and a cleaning agent of the cleaning agent storage tank (610) or of the high-pressure air generator (640) formed between the air pressure transfer pipe (630) and the cleaning agent transfer pipe (620). A thermosetting two-component resin automatic supply system characterized by comprising: a three-way ball valve (650) that opens and closes the interior to selectively deliver high-pressure air to a mixing section (400).

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