Large-size honeycomb spraying process method

Abstract

The invention discloses a large-size honeycomb spraying process method. The method comprises the following steps: S1, cutting a honeycomb to a proper size; s2, drying the honeycomb, draining water in the honeycomb, and putting the honeycomb into a spraying pool; s3, the glue solution is subjected to constant volume, and the glue solution is guided into a glue solution tank to be stored; s4, the glue solution in the glue solution tank is guided to a spraying system at the top of the honeycomb through a flow pump, spraying operation is conducted from top to bottom, redundant glue solution flows back into the glue solution tank from the spraying pool, the glue solution is circularly sprayed to the top of the honeycomb, and glue dipping is conducted repeatedly; s5, vibrating and flapping, removing redundant glue solution from the honeycomb, and airing the honeycomb; and S6, weighing the aired honeycomb, if the weight meets the standard, baking and curing the honeycomb to obtain a finished honeycomb product, and if the weight is lower than the standard, repeating the steps S4 to S6, so that a large amount of resin can be saved, sedimentation and layering are effectively avoided, the consistency of the resin is improved, the consistency of the product quality is also favorably improved, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wave-absorbing honeycomb material processing, and in particular to a large-size honeycomb spraying process method. Background Art

[0002] The absorbing honeycomb is classified as a "structure and function integrated absorbing material" and is obtained by impregnating the honeycomb with an absorbing resin glue containing an absorbent. The main components are aramid honeycomb, composite absorbent and bismaleimide resin matrix. The absorbing honeycomb has good post-processing properties and can be processed into components of a certain shape. It is used for stealth components in the fields of aviation, etc. It can also be used alone as an absorbing material.

[0003] The existing production method of absorbing honeycombs is a manual dipping process; the manual dipping process uses a method of repeatedly immersing the aramid honeycomb completely in resin glue, then letting it air-dry, then immersing it again, and then letting it air-dry to allow the absorbent to adhere to the honeycomb surface, so as to achieve the purpose of evenly covering the honeycomb surface with the absorbent.

[0004] The glue liquid is stored in the glue dipping pool. The glue dipping operation requires that the honeycomb be completely submerged in the glue liquid, which requires a certain amount of glue liquid as "priming glue liquid". This part of the glue liquid will eventually need to be scrapped over time, resulting in the utilization rate of the glue liquid being maintained between 70% and 75%.

[0005] In the manual dipping process, due to consideration of the utilization rate of the resin, it has been verified that after the glue solution is dissolved, the resin performance gradually decreases with the extension of time. For this reason, the use cycle of the glue solution is determined to be "four days". However, even so, the performance of the product produced on the fourth day after the resin has dissolved is still lower than that of the honeycomb produced in the early stage of the resin dissolving.

[0006] After the honeycomb is impregnated, the inner plate is filled with glue, and then the glue is left on the inner wall of the honeycomb hole by gravity and manual patting, leaving only a uniform thin layer. However, manual patting has the disadvantage of poor consistency.

[0007] Therefore, the larger the product, the larger the dipping tank is required, and the more finished the product, the deeper the resin glue liquid in the dipping tank is required, which will inevitably lead to problems such as low resin utilization, long glue liquid use cycle, manual dipping, and poor patting consistency. Summary of the invention

[0008] In order to solve the technical problems existing in the background technology, the present invention proposes a large-size honeycomb spraying process method.

[0009] A large-size honeycomb spraying process method proposed by the present invention:

[0010] S1, cutting honeycomb to appropriate size;

[0011] S2, dry the honeycomb, drain the internal water, and put it into the spray pool;

[0012] S3, the glue solution is dissolved and introduced into the glue solution tank for storage;

[0013] S4, the glue in the glue tank is guided to the spraying system on the top of the honeycomb through a flow pump, and the spraying operation is carried out from top to bottom. The excess glue flows back to the glue tank from the spray pool, and is circulated and sprayed to the top of the honeycomb, and the glue is repeatedly dipped;

[0014] S5, vibrating and beating to remove excess glue from the honeycomb, and then airing the honeycomb;

[0015] S6, weighing the honeycomb after airing, if the weight meets the standard, baking and curing the honeycomb to obtain a finished honeycomb, if the weight is lower than the standard, repeating steps S4-S6.

[0016] Preferably, the spray system adopts an aluminum frame, which is fastened by bolts to form a gantry frame, and a slider is slidably connected to the gantry frame, and a spray nozzle is installed on the slider.

[0017] Preferably, a stirring mechanism is provided in the glue tank.

[0018] Preferably, the bottom of the spray pool is set as an inclined slope, and the glue liquid flows back into the glue liquid tank by gravity.

[0019] Preferably, the flow pump adopts a pneumatic diaphragm pump, and the flow data can be determined by adjusting the air pressure, and the spraying air pressure is set within the range of 0.2-0.3MPa.

[0020] Preferably, the spray height is set at 170mm-220mm.

[0021] In the present invention, a large-size honeycomb spraying process method is proposed, and the automatic spraying process is to store the resin glue in a circulation system and repeatedly spray it onto the surface of the aramid honeycomb through a spray head, so that there is no need to fill a large amount of glue in the dipping tank, as long as the glue can meet the circulation requirements and product weight gain;

[0022] The characteristic of the spraying process is that there is no need to immerse the honeycomb in the glue pool. Instead, it is a top-down spraying operation. The gravity of the glue is used to flow down and fill every place on the inner wall of the honeycomb. Finally, the glue flows back to the glue tank through the pipeline and is recycled, which can improve the utilization rate of the resin.

[0023] Therefore, a large amount of resin can be saved. And because the glue liquid is constantly circulating and stirring in the system, it can effectively avoid sedimentation and stratification, improve the consistency of the resin, and also help improve the consistency of product quality;

[0024] Compared with the conventional dipping process, the cost of the spraying process is lower. The total cost of the spraying process product is only about 85-90% of the conventional dipping process.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Explanation of the numbers in the figure: 1. Spray pool; 2. Spray system; 3. Glue tank; 4. Conveyor. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] like Figure 1 A large-size honeycomb spraying process method is shown:

[0030] S1, cutting honeycomb to appropriate size;

[0031] S2, drying the honeycomb, draining the internal water, and placing it in the spray pool 1;

[0032] The honeycomb material is transported by the conveyor 4.

[0033] S3, the glue solution is dissolved and introduced into the glue solution tank 3 for storage;

[0034] S4, the glue in the glue tank 3 is guided to the spray system 2 on the top of the honeycomb through a flow pump, and the spraying operation is carried out from top to bottom. The excess glue flows back to the glue tank 3 from the spray pool 1, and is circulated and sprayed to the top of the honeycomb, and the glue is repeatedly dipped;

[0035] S5, vibrating and beating to remove excess glue from the honeycomb, and then airing the honeycomb;

[0036] S6, weighing the honeycomb after airing, if the weight meets the standard, baking and curing the honeycomb to obtain a finished honeycomb, if the weight is lower than the standard, repeating steps S4-S6.

[0037] Preferably, the spray system 2 uses an aluminum frame, which is fastened by bolts to form a gantry frame, and a slider is slidably connected to the gantry frame, and a spray nozzle is installed on the slider.

[0038] The spray system 2 is designed in the form of X, Y, and Z axes, where the X direction is the length direction of the honeycomb, the Y direction is the width direction of the honeycomb, and the Z direction is the width direction of the honeycomb. The height of the spray head is precisely adjusted through program settings, and it moves at a uniform speed on the honeycomb plate to complete the spraying operation.

[0039] The sprinkler head should be able to move regularly to ensure that the honeycomb holes can absorb the glue. It is designed as a hose to facilitate the movement of the sprinkler head.

[0040] The material of the sprinkler head is resistant to solvent corrosion and easy to clean;

[0041] The shape and aperture of the spray head should meet the needs of continuous spraying and discharging. Problems such as bifurcation and poor glue flow should not occur during the construction process.

[0042] Preferably, a stirring mechanism is provided in the glue liquid tank 3. In order to ensure the uniformity of the glue liquid and prevent the glue liquid from settling, a stirring device is designed for the storage tank. Since the solution used is flammable and explosive, this scheme selects an air motor to drive the stirring device. During the spraying operation, the air motor is turned on to stir continuously.

[0043] Preferably, the bottom of the spray pool 1 is set to be an inclined slope, and the glue liquid flows back into the glue liquid tank 3 by gravity.

[0044] Preferably, the flow pump adopts a pneumatic diaphragm pump, and the flow data can be determined by adjusting the air pressure, and the spraying air pressure is set within the range of 0.2-0.3MPa.

[0045] Preferably, the spray height is set at 170mm-220mm.

[0046] Comparative analysis of the quality of automatic spraying and conventional dipping processes

[0047] Quality comparison analysis table

[0048]

[0049]

[0050] After four rounds of trial production verification, the test pieces with thicknesses of 50mm, 90mm and 140mm have been tested and basically meet the quality standard requirements; however, the uniformity of weight gain of the test pieces with a thickness of 175mm cannot meet the requirements, and the process parameters need to be optimized in the later stage.

[0051] Comparative analysis of the cost of automatic spraying and conventional dipping processes

[0052] Comparison table of total cost of products produced by two processes

[0053]

[0054] From this table, we can see that the cost of the spraying process is lower than that of the conventional dipping process. The total cost of the spraying process product is only about 85-90% of that of the conventional dipping process.

[0055] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large-size honeycomb spraying process, characterized in that: S1, cutting honeycomb to appropriate size; S2, drying the honeycomb, draining the internal water, and placing it in the spray pool (1); S3, the glue solution is dissolved and introduced into the glue solution tank (3) for storage; S4, the glue in the glue tank (3) is guided to the spray system (2) on the top of the honeycomb through a flow pump, and the spraying operation is carried out from top to bottom. The excess glue flows back from the spray pool (1) to the glue tank (3), and is circulated and sprayed to the top of the honeycomb, and the glue is repeatedly dipped; S5, vibrating and beating to remove excess glue from the honeycomb, and then airing the honeycomb; S6, weighing the honeycomb after airing, if the weight meets the standard, baking and curing the honeycomb to obtain a finished honeycomb, if the weight is lower than the standard, repeating steps S4-S6.

2. A large-size honeycomb spraying process according to claim 1, characterized in that: The spray system (2) adopts an aluminum frame, which is fastened by bolts to form a gantry frame. A slider is slidably connected to the gantry frame, and a spray nozzle is installed on the slider.

3. A large-size honeycomb spraying process according to claim 1, characterized in that: The glue liquid tank (3) is provided with a stirring mechanism.

4. A large-size honeycomb spraying process according to claim 1, characterized in that: The bottom of the spray pool (1) is configured as an inclined slope, and the glue liquid flows back into the glue liquid tank (3) by gravity.

5. A large-size honeycomb spraying process according to claim 1, characterized in that: The flow pump adopts a pneumatic diaphragm pump, and the flow data can be determined by adjusting the air pressure, and the spraying air pressure is set within the range of 0.2-0.3MPa.

6. A large-size honeycomb spraying process according to claim 1, characterized in that: The spray height is set at 170mm-220mm.

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