A closed dipping system for pultrusion

Abstract

The present invention provides a closed glue dipping system for pultrusion molding, including a closed glue dipping tank and a circulating feeding system, wherein the bottom of the closed glue dipping tank is provided with a plurality of reflux holes, the side wall of the closed glue dipping tank is provided with a plurality of feed holes, the reflux holes are connected to the return port of the circulating feeding system, and the feed holes are connected to the discharge port of the circulating feeding system. The present invention changes the traditional open feeding method of the existing glue dipping system, adopts a closed glue dipping tank and a circulating feeding system, realizes circulating feeding, effectively prevents the powder in the resin from precipitating in the glue dipping tank, ensures product quality, and prevents environmental pollution caused by solvent volatilization, thereby improving the operating environment.

Description

Technical Field

[0001] The invention relates to the technical field of pultrusion molding of fiber products, in particular to a closed type glue dipping system for pultrusion molding. Background Art

[0002] In the traditional fiber product pultrusion process, the resin tank used for the unsaturated resin dipping part is open, and the glass fiber (carbon fiber) is pulled out after dipping, preforming mold and mold curing. The disadvantages are: the styrene in the unsaturated resin has a low volatility point, and the volatilization of styrene during the production process will have an impact on the environment and affect the product quality; in addition, the resin formula contains powder, and after a long period of production, the powder in the resin will settle at the bottom of the resin tank, further affecting the product quality. Summary of the invention

[0003] The present invention aims to solve the problems described above. One object of the present invention is to provide a closed dipping system for pultrusion that solves any of the above problems. Specifically, the present invention provides a closed dipping system for pultrusion that can reduce environmental pollution caused by solvent volatilization and prevent powder precipitation.

[0004] In order to solve the above technical problems, the present invention provides a closed glue dipping system for pultrusion molding, wherein the closed glue dipping system for pultrusion molding comprises a closed glue dipping tank and a circulating feeding system, wherein a plurality of reflux holes are arranged at the bottom of the closed glue dipping tank, and a plurality of feed holes are arranged on the side wall of the closed glue dipping tank, the reflux holes are connected with the return port of the circulating feeding system, and the feed holes are connected with the discharge port of the circulating feeding system.

[0005] Wherein, the closed glue dipping system for pultrusion molding also includes a waste gas recovery device, and an air outlet is arranged on the top of the closed glue dipping tank, and the waste gas recovery device is connected to the air outlet.

[0006] Among them, at least one yarn threading plate and at least one preformed plate are arranged in the closed glue dipping tank, and the yarn threading plate is arranged between the preformed plate and the entrance of the closed glue dipping tank; the yarn threading plate is provided with several rows of yarn threading holes, and the preformed plate is provided with preformed holes of a rectangular structure.

[0007] Among them, two yarn threading plates are arranged in the closed glue dipping tank, including a first yarn threading plate and a second yarn threading plate, the first yarn threading plate is arranged at the entrance of the closed glue dipping tank, and the row spacing of the yarn threading holes on the first yarn threading plate is greater than the row spacing of the yarn threading holes on the second yarn threading plate.

[0008] Among them, two preformed plates are arranged in the closed dipping tank, including a first preformed plate and a second preformed plate, the first preformed plate is located between the second preformed plate and the yarn threading plate, and the height of the preformed holes on the first preformed plate is greater than or equal to the height of the preformed holes on the second preformed plate.

[0009] Wherein, the outlet of the closed glue dipping tank is fixedly connected to the mold.

[0010] Wherein, the circulating feeding system comprises a feeding tank and an agitator, the discharge port is located at the bottom of the feeding tank, the return port is located on the side wall of the feeding tank, and the agitator is located inside the feeding tank.

[0011] Wherein, the bottom of the supply tank is a conical structure.

[0012] Wherein, a return valve is arranged between the reflux hole and the return port of the circulating supply system, and a discharge valve is arranged between the feed hole and the discharge port of the circulating supply system.

[0013] The present invention changes the traditional open feeding mode of the existing dipping system, adopts a closed dipping tank and a circulating feeding system to realize circulating feeding, effectively prevents the powder in the resin from precipitating in the dipping tank, ensures product quality, prevents environmental pollution caused by solvent volatilization, and improves the operating environment.

[0014] Other characteristic features and advantages of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. For those of ordinary skill in the art, other drawings can be obtained from these drawings without paying creative work.

[0016] Figure 1 The structural schematic diagram of the closed type dipping system for pultrusion molding of the present invention is exemplarily shown. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0018] The present invention changes the open dipping and feeding mode in the traditional fiber production line into a closed dipping system, adopts a closed dipping tank, effectively avoids environmental pollution caused by solvent volatilization, and utilizes a waste gas recovery device connected to the top of the closed dipping tank to recover volatile gas components; at the same time, a circulating feeding system is adopted to feed the tank through the side wall of the dipping tank, and the tank liquid at the bottom of the tank is recovered into a feeding tank, which effectively avoids the powder from being deposited at the bottom of the dipping tank, fully ensures the uniformity and fluidity of the tank liquid in the dipping tank, and ensures the dipping effect of the product; in addition, an agitator is arranged in the top of the feeding tank to stir the liquid in the feeding tank in real time, avoids precipitation or stratification of the glue liquid, and ensures that the liquid flowing into the closed dipping tank is evenly mixed.

[0019] The closed type dipping system for pultrusion provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Figure 1 A schematic diagram showing a specific embodiment of the closed type dipping system for pultrusion molding of the present invention is shown. Figure 1 As shown, the closed dipping system for pultrusion molding includes a closed dipping tank 1 and a circulating feeding system 2. Among them, a plurality of reflux holes 101 are arranged at the bottom of the closed dipping tank 1, and a plurality of feed holes 102 are arranged on the side wall of the closed dipping tank 1. The reflux holes 101 are connected to the return port 201 of the circulating feeding system 2, and the feed holes 102 are connected to the discharge port 202 of the circulating feeding system 2, thereby forming a closed-loop, circulating dipping system, ensuring the fluidity of the tank liquid in the closed dipping tank 1, avoiding precipitation of the tank liquid after standing for a long time, and thus ensuring the dipping effect and surface quality of the product.

[0021] In addition, the closed dipping system for pultrusion molding of the present invention also includes a waste gas recovery device (not shown in the figure), which is used to recover the volatile gas in the closed dipping tank 1 to prevent the volatilization of the gas from causing adverse effects on the surrounding environment and the health of the staff. Specifically, an air outlet 103 is provided at the top of the closed dipping tank 1 (for example, on the cover 10), and the waste gas recovery device is connected to the air outlet 103 to fully recover the volatile components in the tank liquid, which can not only prevent the components in the tank liquid from volatilizing and affecting the surrounding environment, but also prevent the volatilized gaseous components from affecting the air pressure in the closed dipping tank 1 and affecting the normal operation of production.

[0022] Specifically, at least one yarn feeding plate 11 and at least one preformed plate 12 are provided in the closed glue dipping tank 1 to guide the yarn to run in the closed glue dipping tank 1. The yarn feeding plate 11 is provided between the preformed plate 12 and the entrance of the closed glue dipping tank 1, or at the entrance of the glue dipping tank, while the preformed plate 12 is located between the yarn feeding plate 11 and the exit of the closed glue dipping tank 1. The yarn feeding plate 11 is provided with a plurality of rows of yarn feeding holes 110, and the preformed plate 12 is provided with rectangular preformed holes 120, both of which are used to guide the yarn to run in the glue dipping tank.

[0023] In practical applications, a number of vertical limit grooves or limit strips 13 are arranged at intervals on the side wall of the closed glue dipping tank 1 to fix the threading plate 11 and the preformed plate 12. For example, through holes with corresponding intervals (the intervals on the limit strips are the same as the intervals on the threading plate or the preformed plate) can be arranged on the limit grooves or limit strips 13 and at the corresponding positions on the edges of the threading plate 11 and the preformed plate 12, and connected and fixed by a combination of screws and nuts or positioning pins and other positioning parts, so as to install and position the threading plate 11 and the preformed plate 12. Specifically, the number, spacing, etc. of the threading plate 11 and the preformed plate 12 can be arranged according to factors such as the length of the glue dipping tank, the number of yarns, and the requirements for the quality of the yarn dipping, so as to ensure the quality of the product dipping and molding.

[0024] exist Figure 1 In the illustrated embodiment, two yarn-threading plates 11 are arranged in the closed glue-dipping tank 1, including a first yarn-threading plate 111 and a second yarn-threading plate 112, wherein the first yarn-threading plate 111 is arranged at the entrance of the closed glue-dipping tank 1, and the second yarn-threading plate 112 is located between the first yarn-threading plate 111 and the preformed plate 12, that is, the yarn first passes through the yarn-threading holes on the first yarn-threading plate 111, and then passes through the yarn-threading holes on the second yarn-threading plate 112. In order to better guide the yarn, ensure that each yarn is fully dipped in glue, and provide preparation for the subsequent forming process, the row spacing of the yarn-threading holes 110 on the first yarn-threading plate 111 is greater than the row spacing of the yarn-threading holes 110 on the second yarn-threading plate 112, that is, the yarn gradually gathers after being dipped in glue.

[0025] Correspondingly, two preforming plates 12 are arranged in the closed dipping tank 1, including a first preforming plate 121 and a second preforming plate 122, wherein the first preforming plate 121 is located between the second preforming plate 122 and the threading plate 11, and the height of the preforming hole 120 on the first preforming plate 121 is greater than or equal to the height of the preforming hole 120 on the second preforming plate 122 to ensure the preforming effect of the product.

[0026] During production, the outlet of the closed dipping tank 1 is fixedly connected to the mold through the mold connection port, so that the fully dipped product directly enters the mold for molding, effectively shortening the length of the production line and further ensuring the product molding effect.

[0027] In the closed glue dipping system of the present invention, the circulating feeding system 2 includes a feeding tank 21 and an agitator 22, the discharge port 202 is located at the bottom of the feeding tank 21, the return port 201 is located on the side wall of the feeding tank 21, and the agitator 22 is located in the feeding tank 21. The return port 201 and the discharge port 202 are respectively connected to the reflux hole 101 and the feed hole 102 of the closed glue dipping tank 1 through pipelines to form a closed circulating feeding system.

[0028] Specifically, the bottom of the supply tank 21 is a conical structure, which ensures the fluidity of the material at the bottom of the supply tank 21 and prevents the material from being deposited at the bottom of the supply tank 21 .

[0029] In a typical embodiment, a return valve 23 is provided between the reflux hole 101 and the return port 201 of the circulating supply system 2, and a discharge valve 24 is provided between the feed hole 102 and the discharge port 202 of the circulating supply system 2, which are used to control the material flow and cutoff of the corresponding pipelines respectively.

[0030] In actual production, a feed pump (not shown in the figure) is connected between the discharge port 202 of the feed tank 21 and the feed hole 102 of the closed dipping tank 1 to supply the liquid in the feed tank 21 to the closed dipping tank 1. Correspondingly, a return pump (not shown in the figure) can also be connected between the reflux hole 101 of the closed dipping tank 1 and the return port 201 of the feed tank 21 to evenly draw the tank liquid at the bottom of the closed dipping tank 1 back to the feed tank 21, so as to fully ensure the fluidity of the tank liquid at the bottom of the dipping tank.

[0031] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A closed dipping system for pultrusion, characterized in that: The closed glue dipping system for pultrusion molding comprises a closed glue dipping tank (1) and a circulating feeding system (2), wherein a plurality of reflux holes (101) are arranged at the bottom of the closed glue dipping tank (1), a plurality of feed holes (102) are arranged at the side wall of the closed glue dipping tank (1), the reflux holes (101) are connected to a return port (201) of the circulating feeding system (2), and the feed holes (102) are connected to a discharge port (202) of the circulating feeding system (2); The closed glue dipping tank (1) further comprises: a first yarn threading plate (111), a second yarn threading plate (112), a first preformed plate (121) and a second preformed plate (122); The first yarn threading plate (111) and the second yarn threading plate (112) are both provided with a plurality of rows of yarn threading holes (110); The first yarn threading plate (111) is arranged at the entrance of the closed glue dipping tank (1), and the row spacing of the yarn threading holes (110) on the first yarn threading plate (111) is greater than the row spacing of the yarn threading holes (110) on the second yarn threading plate (112); The first preformed plate (121) is located between the second preformed plate (122) and the second threading plate (112), and the height of the preformed hole (120) on the first preformed plate (121) is greater than or equal to the height of the preformed hole (120) on the second preformed plate (122); Wherein, the second yarn threading plate (112) is located between the first preformed plate (121) and the first yarn threading plate (111); The closed glue dipping system for pultrusion molding further comprises a waste gas recovery device, an air outlet (103) is provided at the top of the closed glue dipping tank (1), and the waste gas recovery device is connected to the air outlet (103).

2. The closed type dipping system for pultrusion as claimed in claim 1, characterized in that: The preformed hole (120) is a rectangular structure.

3. The closed type dipping system for pultrusion as claimed in claim 1, characterized in that: The outlet of the closed glue dipping tank (1) is fixedly connected to the mold.

4. The closed type dipping system for pultrusion as claimed in claim 1, characterized in that: The circulating supply system (2) comprises a supply tank (21) and an agitator (22), the discharge port (202) is located at the bottom of the supply tank (21), the return port (201) is located on the side wall of the supply tank (21), and the agitator (22) is located inside the supply tank (21).

5. The closed type dipping system for pultrusion as claimed in claim 4, characterized in that: The bottom of the feed tank (21) is a conical structure.

6. The closed type dipping system for pultrusion as claimed in claim 1, characterized in that: A return valve is provided between the return hole (101) and the return port (201) of the circulating supply system (2), and a discharge valve is provided between the feed hole (102) and the discharge port (202) of the circulating supply system (2).

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