Nano-material composite coating of guitar fingerboard and wear-resistant and corrosion-resistant process

Abstract

The invention belongs to the technical field of guitar fingerboard preparation, and particularly relates to a nano-material composite coating of a guitar fingerboard and a wear-resistant and corrosion-resistant process, and the process comprises the following steps: S1, pretreating a base material to obtain a smooth fingerboard; s11, cutting, wherein a base material is selected, and the base material is cut into a blank with the size larger than that of the fingerboard through a cutting machine; the blank is ground through any one of an automatic grinding machine or a manual grinding machine, so that the appearance shape and size of the blank are close to the specified shape, and the fingerboard initial shape is obtained; an edge trimming machine is used for conducting edge trimming treatment on the edge position of the blank, the corners of the blank are trimmed into round corners from right angles, and a rough fingerboard is obtained; s2, the base material is modified to form an anti-corrosion bottom layer; and S3, the fingerboard joint is placed in a curing box to be subjected to low-temperature curing. According to the invention, through layered compounding and low-temperature curing technologies, the problem that timbre is affected because wear resistance and corrosion resistance are difficult to consider in the prior art is solved.

Description

Technical Field

[0001] This invention belongs to the field of guitar fingerboard manufacturing technology, specifically relating to a nanomaterial composite coating and wear-resistant and corrosion-resistant process for guitar fingerboards. Background Technology

[0002] The guitar fretboard, as the core component that the fingers directly contact and that is repeatedly rubbed against the strings during playing, directly affects the playing experience, lifespan, and tone of the instrument. Currently, the mainstream materials for guitar fretboards are mostly natural woods such as rosewood, maple, and ebony.

[0003] However, due to the low surface hardness of wood, it is prone to scratches and grooves caused by fingers pressing the strings, sliding the strings, and friction between the strings during long-term use, which can lead to inaccurate pitch. In addition, the porous structure of wood easily absorbs sweat and environmental moisture, which can cause mold and corrosion. Especially in humid environments, the fingerboard is prone to deformation and cracking, which seriously affects the lifespan of the guitar. Summary of the Invention

[0004] The purpose of this invention is to provide a nanomaterial composite coating and wear-resistant and corrosion-resistant process for guitar fingerboards. This process can solve the problem that it is difficult to achieve both wear resistance and corrosion resistance in existing processes, which affects the tone, through layered composite and low-temperature curing technology.

[0005] The specific technical solution adopted by this invention is as follows:

[0006] A nanomaterial composite coating for a guitar fretboard includes a substrate body, a plurality of fret grooves formed on the surface of the substrate body, a nano-functional coating sprayed on the surface of the substrate body, and adhesive coated in the fret grooves.

[0007] The surface of the nano-functional coating is coated with epoxy resin adhesive.

[0008] Several protrusions are fixedly connected to the side wall of the wire groove.

[0009] A wear-resistant and corrosion-resistant process for guitar fingerboards, the process comprising the following steps:

[0010] S1: Pre-treat the substrate to obtain a smooth finger plate;

[0011] The specific content of S1 is as follows:

[0012] S11: Cutting: Select the substrate and use a cutting machine to cut the substrate into blanks larger than the finger plate size;

[0013] S12: Shaping: Use either an automatic grinder or a manual grinder to grind the blank so that the appearance and size of the blank are close to the specified shape, and obtain the initial shape of the finger plate;

[0014] S13: Trimming: Using a trimming machine to trim the edges of the blank, turning the right angles of the blank into rounded corners to obtain a rough finger plate;

[0015] S14: Polishing: Use 10-120 grit sandpaper for coarse polishing, then use 180-240 grit medium sandpaper for initial polishing, and finally use 320-400 grit fine sandpaper for fine polishing to obtain a smooth fingerboard.

[0016] S2: Modify the substrate material to form an anti-corrosion underlayer;

[0017] The specific content of S2 is as follows:

[0018] S21: Use a 75% (v / v) ethanol aqueous solution for sonication for 10-20 minutes, dry to a moisture content of 8-10%, and perform degreasing treatment;

[0019] The degreasing treatment is as follows: the fingerboard wood is soaked in a sodium carbonate aqueous solution with a mass fraction of 5-8% and treated at a constant temperature of 40-45℃ for 1-1.5 hours. After removal, it is rinsed with deionized water until neutral.

[0020] S22: Mix silane coupling agent and deionized water at a mass ratio of 1:8-1:10, add 3-5% of nano zinc oxide particles by mass of the mixture, and ultrasonically disperse for 30-40 minutes to prepare the base solution;

[0021] S23: The primer is penetrated to a depth of 50-100μm on the surface of the finger plate using a vacuum impregnation method, and then dried at 60-70℃ for 1-1.5h to form a gradient penetration primer layer;

[0022] S24: Prepare a nano-functional coating and spray the nano-functional coating onto the surface of the finger plate using an electrostatic spraying method to form a wet film coating with a thickness of 20-40 μm.

[0023] The nanofunctional coating is prepared by the following components by weight: 60-70 parts modified polyurethane resin, 5-8 parts nanodiamond particles, 3-5 parts nano alumina particles, 0.5-1 parts dispersant and 0.3-0.5 parts leveling agent. All components are mixed by high-speed rotation to obtain the nanofunctional coating.

[0024] S3: Place the finger joints in a curing chamber for low-temperature curing;

[0025] In step S3, inert gas is injected into the curing chamber at a flow rate of 0.5-1 L / min.

[0026] The curing process consists of three stages: pre-curing, final curing, and cooling. The pre-curing temperature is 30-45℃ and the time is 20-40 minutes. The final curing temperature is 50-60℃ and the time is 2-3.5 hours, followed by natural cooling.

[0027] S4: Apply a layer of epoxy resin adhesive to the surface of the fingerboard, and obtain the finished fingerboard after curing.

[0028] The technical effects achieved by this invention are as follows:

[0029] The present invention discloses a nanomaterial composite coating and wear-resistant and corrosion-resistant process for guitar fingerboards. Through the synergistic design of gradient penetration priming and nanocomposite functional layer, it achieves the dual functions of internal corrosion protection and surface wear resistance of the substrate, solves the problem of weak bonding between the coating and wood, and the process can be applied to substrates such as rosewood, maple, and ebony, with high flexibility and strong controllability. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0031] Figure 2 This is a flowchart of Embodiment 2 of the present invention.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Substrate body; 2. Wire groove; 3. Nano-functional coating; 4. Adhesive; 5. Epoxy resin adhesive; 6. Bump. Detailed Implementation

[0034] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0035] Example 1:

[0036] like Figure 1 As shown, a nanomaterial composite coating for a guitar fretboard includes a substrate body 1, a plurality of fret grooves 2 formed on the surface of the substrate body 1, a nano-functional coating 3 sprayed onto the surface of the substrate body 1, and adhesive 4 coated inside the fret grooves 2. The adhesive 4 is used to fix the frets during assembly, so that the frets are fixed in the fret grooves 2.

[0037] Several protrusions 6 are fixedly connected to the side wall of the wire groove 2, and all protrusions 6 are inclined downwards. When assembling the wire, glue is first injected into the wire groove 2, then the wire is placed in the wire groove 2, and the wire is pressed into the wire groove 2 by tapping or using a press. At the same time, the protrusions 6 are subjected to extrusion force and shift downwards to fill the gap between the wire and the wire groove 2, thereby increasing the contact strength between the wire and the wire groove 2 and further improving the connection stability.

[0038] The surface of the nano-functional coating 3 is coated with epoxy resin adhesive 5. When applying epoxy resin adhesive 5, only a thin layer is needed, mainly to provide waterproofing and moisture protection, preventing external humid air from penetrating. Furthermore, epoxy resin adhesive 5 needs to be applied before the filament is assembled, but it is not applied inside the filament groove 2.

[0039] Example 2:

[0040] A wear-resistant and corrosion-resistant process for guitar fingerboards, comprising the following steps:

[0041] like Figure 2 As shown, S1: Pre-treat the substrate to obtain a smooth finger plate;

[0042] In S1, the specific content is as follows:

[0043] S11: Cutting: Select the base material. Select a guitar fingerboard base material without blemishes or cracks. Use a cutting machine to cut the base material into blanks larger than the fingerboard size. Cut the base material into blanks 2-3mm larger than the designed fingerboard size to allow for subsequent sanding.

[0044] S12: Shaping: Use either an automatic or manual grinder to grind the blank to make its appearance and size close to the specified shape, thus obtaining the initial shape of the finger plate; the deviation between the appearance of the blank and the designed finger plate shape should be ≤0.5mm, and the dimensional deviation should be ≤0.3mm, thus obtaining the initial shape of the finger plate; if it is an irregularly shaped finger plate, a manual grinder is used to facilitate the correction of details;

[0045] S13: Trimming: Use a trimming machine to trim the edges of the blank, turning the right angles of the blank into rounded corners to obtain a rough finger plate; a CNC trimming machine can be used to trim the edges of the blank, turning all the edges of the blank from right angles into rounded corners. After trimming, the surface roughness of the edge Ra≤1.6μm is obtained to obtain a rough finger plate.

[0046] S14: Polishing: Use 10-120 grit sandpaper for coarse polishing, then use 180-240 grit medium sandpaper for initial polishing, and finally use 320-400 grit fine sandpaper for fine polishing to obtain a smooth fingerboard.

[0047] S2: Modify the substrate material to form an anti-corrosion underlayer;

[0048] In S2, the specific content is as follows:

[0049] S21: Use a 75% ethanol aqueous solution to sonicate for 10-20 minutes, dry to a moisture content of 8-10%, and perform degreasing treatment to remove surface dust and residual grease;

[0050] The degreasing treatment specifically involves immersing the fingerboard wood in a 5-8% sodium carbonate aqueous solution and maintaining this temperature at 40-45℃ for 1-1.5 hours. After removal, rinse with deionized water until neutral. This effectively removes surface and shallow layers of grease without damaging the wood fiber structure. Rinsing with deionized water until neutral removes residual sodium carbonate, preventing alkaline residues from causing subsequent coating deterioration and ensuring coating stability.

[0051] S22: Mix silane coupling agent and deionized water at a mass ratio of 1:8-1:10, add 3-5% (by mass) of nano-zinc oxide particles, and ultrasonically disperse for 30-40 minutes to prepare the primer. This ensures both the solubility of the silane coupling agent and suitable penetration properties of the primer. The antibacterial and anti-corrosion properties of nano-zinc oxide can block corrosion pathways from within the substrate, preventing mold growth in the pores of wood. After ultrasonic dispersion for 30-40 minutes, the nano-zinc oxide particles are uniformly dispersed in the primer without agglomeration.

[0052] S23: The primer is penetrated to a depth of 50-100μm on the surface of the finger plate using a vacuum impregnation method, and then dried at 60-70℃ for 1-1.5h to form a gradient penetration primer layer;

[0053] The gradient penetration primer process differs from the surface coating primer process in existing processes. It uses vacuum impregnation to penetrate a mixture of silane coupling agent and nano zinc oxide into the surface of the wood. It utilizes the bifunctional characteristics of the silane coupling agent, that is, one end binds to the hydroxyl groups of wood cellulose and the other end binds to the upper functional layer resin, which strengthens the interfacial adhesion. At the same time, the nano zinc oxide particles form an anti-corrosion network in the pores of the wood, blocking the corrosion path from the inside of the substrate.

[0054] S24: Prepare nano-functional coating 3, and spray nano-functional coating 3 onto the surface of the finger plate by electrostatic spraying to form a wet film coating with a thickness of 20-40 μm.

[0055] The nano-functional coating 3 is prepared by mass fraction comprising: 60-70 parts of modified polyurethane resin, 5-8 parts of nano-diamond particles, 3-5 parts of nano-alumina particles, 0.5-1 parts of dispersant and 0.3-0.5 parts of leveling agent. All components are mixed by high-speed rotation to obtain the nano-functional coating 3.

[0056] Among them, the preparation of nano-functional coating 3 abandons the single nanoparticle coating and adopts a composite system formed by mixing multiple component materials. Through a specific ratio, the functional layer has both wear resistance with a Mohs hardness of 6-7 and good flexibility (elongation at break ≥15%), matching the deformation characteristics of wood and avoiding coating cracking.

[0057] This solution, through the application of nano-functional coating 3, ensures that the fingerboard surface remains smooth during long-term use, preventing a decline in string feel due to surface wear. The coating is also resistant to cracking and peeling during temperature changes (such as from dry northern regions to humid southern regions), maintaining its protective integrity. From an aesthetic perspective, the nano-functional coating 3 offers high transparency, preserving the natural texture of the substrate 1 and maintaining the guitar fingerboard's beauty, thus meeting consumers' demand for the natural feel of wood.

[0058] S3: Place the fingerboard joints in a curing chamber for low-temperature curing; control the curing temperature at 40-60℃, which is much lower than the 80-120℃ of the existing process, and at the same time introduce inert gas to prevent resin oxidation. This avoids wood thermal deformation and ensures that the resin is fully cured, thus solving the problem of tone deterioration caused by high temperature.

[0059] In S3, inert gas is injected into the curing chamber at a flow rate of 0.5-1 L / min;

[0060] The curing process consists of three stages: pre-curing, final curing, and cooling. The pre-curing temperature is 30-45℃ and the time is 20-40 minutes. The final curing temperature is 50-60℃ and the time is 2-3.5 hours, followed by natural cooling.

[0061] Low temperature prevents the wood's fiber structure from being damaged by thermal expansion and contraction at high temperatures. On the other hand, low temperature can preserve the natural resonance characteristics of the wood to the greatest extent, avoiding tone deterioration caused by high temperatures and ensuring the guitar's playing tone. At the same time, the use of inert gas prevents the resin in the nano-functional coating 3 from being oxidized during the curing process, which is especially suitable for light-colored maple fingerboards, thereby ensuring the stability of the curing environment, preventing dust and impurities in the air from adhering to the coating surface, and ensuring the smoothness of the coating.

[0062] S4: Apply a layer of epoxy resin adhesive 5 to the surface of the fingerboard, and obtain the finished fingerboard after curing.

[0063] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A nanomaterial composite coating for a guitar fingerboard, characterized by: The base material body (1) is provided with a plurality of filiform grooves (2) on the surface, and the surface of the base material body (1) is sprayed with a nano functional coating (3), and the filiform grooves (2) are coated with glue (4).

2. The nanomaterial composite coating of a guitar fingerboard according to claim 1, characterized in that: The surface of the nano functional coating (3) is coated with epoxy resin glue (5).

3. The nanomaterial composite coating of a guitar fingerboard according to claim 1, characterized in that: The side wall of the filiform groove (2) is fixedly connected with a plurality of protrusions (6).

4. The wear-resistant and corrosion-resistant process of the guitar fingerboard, the nanomaterial composite coating of the guitar fingerboard according to any one of claims 1-3, characterized in that: The process comprises the following steps: S1: pretreat the base material to obtain a smooth finger plate; S2: modify the base material to form a corrosion-resistant bottom layer; S3: place the finger plate in a curing box for low-temperature curing; S4: coat the surface of the finger plate with a layer of epoxy resin glue (5), and obtain the finished finger plate after curing.

5. A wear-resistant and corrosion-resistant process for a guitar fingerboard according to claim 4, characterized in that: In S1, the specific content is as follows: S11: cutting: select the base material and cut it into a blank larger than the size of the finger plate using a cutting machine; S12: shaping: use any one of an automatic sander or a manual sander to sand the blank, so that the appearance shape and size of the blank are close to the specified shape, and obtain the initial shape of the finger plate; S13: edge trimming: use an edge trimming machine to trim the edge position of the blank, and trim the straight angle of the blank to a round angle, to obtain a rough finger plate; S14: sanding: use 10-120 mesh sandpaper for rough sanding, then use 180-240 mesh sandpaper for preliminary sanding, and finally use 320-400 mesh fine sandpaper for fine sanding, to obtain a smooth finger plate.

6. A wear resistant corrosion resistant process for a guitar fingerboard as claimed in claim 4, wherein: In S2, the specific content is as follows: S21: use an ethanol aqueous solution with a volume fraction of 75% for ultrasonic treatment for 10-20 min, dry to a water content of 8-10%, and perform degreasing treatment; S22: mix silane coupling agent and deionized water at a mass ratio of 1:8-1:10, add 3-5% of nano zinc oxide particles based on the mass of the mixed solution, and ultrasonic disperse for 30-40 min to prepare a primer solution; S23: use a vacuum impregnation method to penetrate the primer solution to a depth of 50-100 μm in the surface layer of the finger plate, and then dry at 60-70°C for 1-1.5 h to form a gradient permeation primer layer; S24: prepare a nano functional coating (3), and use electrostatic spraying to spray the nano functional coating (3) on the surface of the finger plate to form a wet film coating, and the thickness of the wet film coating is 20-40 μm.

7. A wear resistant and corrosion resistant process for a guitar fingerboard as claimed in claim 6, characterized in that: In S21, the degreasing treatment is specifically: immerse the finger plate wood in a sodium carbonate aqueous solution with a mass fraction of 5-8%, and perform constant temperature treatment at 40-45°C for 1-1.5 h, and then rinse with deionized water to neutral.

8. A wear resistant corrosion resistant process for a guitar fingerboard as claimed in claim 6, wherein: In S24, the preparation of the nano functional coating (3) comprises, by mass fraction: modified polyurethane resin 60-70 parts, nano diamond particles 5-8 parts, nano aluminum oxide particles 3-5 parts, dispersing agent 0.5-1 part, and leveling agent 0.3-0.5 part, and all the ingredients are mixed at high speed to obtain the nano functional coating (3).

9. A wear resistant corrosion resistant process for a guitar fingerboard as claimed in claim 4, wherein: In S3, inert gas is injected into the curing box, and the gas flow is 0.5-1 L / min. The curing temperature adopts three stages of pre-curing, tail section curing and cooling, the pre-curing temperature is 30-45℃, the time is 20-40min, the tail section curing temperature is 50-60℃, the time is 2-3.5h, and the cooling is natural.

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