AU2021101007A4 - Bamboo Guitar Musical Instrument and Manufacturing Method Thereof - Google Patents

Abstract

The present disclosure discloses a bamboo guitar musical instrument and a manufacturing method thereof The manufacturing method includes the following steps: Si, manufacturing a 5 side by taking a carbonized side pressed plate bamboo integrated material with the thickness of 2 mm; S2, manufacturing a top and a bottom plate by a laser cutting machine after two carbonized side pressed plate bamboo integrated plates with the thickness of 3 mm are spliced; S3, completing binding and repairing of bass bars; S4, closing a barrel and forming; S5, manufacturing a finger board; S6, mounting a bridge; S7, binding the finger board and a handle; 10 S8, completing the grinding of the handle, a neck, and a sound barrel; S9, performing painting operation; S10, mounting a pickup. The guitar is manufactured by using bamboo, which plays excellent acoustic performance of a vascular bundle-parenchyma cell gradient structure of the bamboo, and is full of interest and special cultural value. The source of raw materials is wide and the price is low. Meanwhile, the pickup and the bamboo guitar are integrated, which can 15 greatly improve an acoustic effect and meet the requirements of different performance scenes. 1/1 DRAWINGS bass bar A reinforcing plate 1 a 3 plate cutting reinforcing plate 2 reinforcing plate 4 a 3 plate cutting a 3 plate cutting bass bar I bass bar F bass bar H bs a bass bar C bass bar B bass ba1 D bass bar E reinforcing plate 3 8 3 plate cutting FIG. 1 bass bar a bass bar b \ bass bar c \bass bar d FIG. 2

Description

1/1 DRAWINGS

bass bar A

reinforcing plate 1 a 3 plate cutting reinforcing plate 2

reinforcing plate 4 a 3 plate cutting a3 plate cutting

bass bar I bass bar F

bass bar H bs a

bass bar C bass bar B

bass ba1 D

bass bar E

reinforcing plate 3

8 3 plate cutting

FIG. 1

bass bar a

bass bar b

\ bass bar c

\bass bar d

FIG. 2

BAMBOO GUITAR MUSICAL INSTRUMENT AND MANUFACTURING METHOD THEREOF

TECHNICAL FIELD The present disclosure relates to the field of musical instruments, and in particular, to a bamboo guitar musical instrument and a manufacturing method thereof.

BACKGROUND Bamboo, as a musical instrument material, can produce melodious music, which has a close internal relationship with the special cell structure and the chemical composition of the bamboo. The bamboo has the density of 0.6 to 0.7g/cm3 and the elastic modulus of 9 to 15 GPa. Light weight and high strength characteristics endow the bamboo with good acoustic vibration efficiency, which can effectively amplify the vibration of guitar strings through a resonance box and spread to the air. Meanwhile, beautiful timbre of the bamboo comes from its vibration spectrum characteristics. Researches found that the acoustic vibration spectrum characteristics of the bamboo are similar to those of spruce, that is, the loudness is low in a high frequency area, and the loudness is high in a low frequency area. The peak of the vibration changes to the next trough uniformly and continuously with small changes without loud jarring jump, which just compensates the defects that human ears are sensitive to high frequency sound and insensitive to low frequency sound, and accords with the characteristic of "equal loudness of human ear". The special cell structure of the bamboo and a resonance cavity of a bamboo guitar achieve the effects of naturally polishing, modifying, and beautifying. In addition, a hemicellulose part of bamboo is degraded after carbonization treatment, which can greatly improve the dimension stability and the acoustic vibration reliability to adapt to the changes of humidity and heat in natural environment. At current, most guitars are made of superior wood (spruce, red sandalwood, Guibourtia, ebony wood, Cedarwood, walnut, and sapele). Especially, for a medium and high-end guitar, the production and debugging of the top, back, side, finger board, and neck are completed with precious wood (red sandalwood, black locust, ebony wood, and dark wood) elaborately selected by a guitar master, so the price of the raw material is high, and meanwhile, the manufacturing process is complex.

SUMMARY In order to solve the above problems, the present disclosure provides a bamboo guitar musical instrument and a manufacturing method thereof. To achieve the above objective, the technical solution adopted by the present disclosure is that: A manufacturing method for a bamboo guitar musical instrument includes the following steps: S1, manufacturing a side taking a carbonized side pressed plate bamboo integrated material with the thickness of 2 mm, and cutting according to drawing dimensions, where the length direction is consistent with a bamboo texture direction; then, soaking the plate for 15 minutes in warm water at 40 to 45 °C to fully wet the plate; taking out the plate, and immediately wrapping the plate with an aluminum foil to prevent water from evaporating; preheating a bending grinding tool, setting the temperature to be 130 to 135 °C, pressing the plate in place by uniformly bending and stressing, and keeping for 35 minutes to complete the manufacturing of the side of the bamboo guitar; S2, manufacturing a top and a bottom plate S21, coating a suitable amount of plate alignment adhesive after grinding the sides of two carbonized side pressed bamboo integrated plates with the thickness of 3 mm smoothly; splicing the two plates after the two plates are flattened and aligned; applying a pressure on the outer surfaces of the two plates when the two plates are spliced, where the two plates are firmly spliced after 12 hours; S22, inputting parameters of the top and the back of the guitar into a laser cutting machine according to a preset CAD drawing of the guitar, and cutting out the top and the back with specified shapes and dimensions; S3, binding and repairing bass bars drawing bass bar position lines on the top; then, binding the bass bars, after being coated with glue, to the corresponding bass bar position lines, and tightly compressing by using elastic support wood; after completing the mounting treatment of all bass bars, grinding sharp edges of the bass bars to make the bass bars smooth and round, which is beneficial to the reflection of acoustic waves, where the thickness of the bass bars close to the edge of a sound barrel is between 1.5 and 2 mm, and small thickness at the edge of the sound barrel is beneficial to vibration; it is to be noted that the glue spilled because of pressure needs to be cleaned at once after the binding treatment of one bass bar is completed, so that a plate surface is clean; S4, closing a barrel and forming S41, aligning the top or the back with the center of a barrel shape, drawing the positions of the bass bars on the inner side surface of the side by using a pencil; milling to remove scribing parts on the inner side surface of the side through a 3 mm cutter by an edge opener, where it is worth noting that notch dimensions of the inner side surface of the side are consistent with the thickness of edges of the bass bars;

S42, trimming both ends of the bass bars by using a woodworking chisel, and making the bass bars enter the notches in the inner side surface of the side; S43, uniformly coating inner edge strips of the side with Titebond, adjusting the position of the top or the back to make the top or the back consistent with the function of the side; then, clamping the two sides of the position, aligned with the center line of the side, of the top or the back by using F clips, and clamping the four edges with F clips, so that the top or the back are tightly attached to the inner edge strips of the side; after 24 hours, taking down all F clips, and binding the other surface by the same method; S5, manufacturing a finger board cutting and forming fret slots by using Indian rosewood according to a drawing, and wrapping the side surface with pvc; S6, mounting a bridge determining the position of the bridge according to an effective string spacing of the finger board, where the length of string 1 from a nut to a saddle is 652 mm, the center of the bridge needs to be aligned with the center line of the top, and the left and the right are kept balanced; after the position of the bridge is determined, drilling through a string hole on the bridge and the top of the sound barrel together by using a 5 mm drill bit of an electric hand drill, temporarily fix the bridge with string trees, gently drawing a line along the bridge, marking the position of the bridge, sticking flat along the outside of the line by using an adhesive tape, applying the Titebond to the bottom of the bridge, clamping tightly by using F clips, and keeping for 3 hours; S7, binding the finger board and a handle after completing the mounting of front points and side points of the finger board, horizontally placing the finger board, then placing frets coated with glue into the fret slots, gently knocking by using a hammer, knocking the two sides first and knocking the middle, and gently and repeatedly knocking to inlay the frets into the fret slots, where it is required that there is no gap between the frets and the finger board; finding out a center line on a binding surface of the finger board, aligning the center line with the center line of a neck, aligning the fourteenth fret of the finger board with the link of the neck and the sound barrel, applying the Titebond to the handle, clamping the finger board and the handle by using 3 to 4 woodworking clips, and removing the clips after 3 hours; S8, completing the grinding of the handle, the neck, and the sound barrel, namely, filing by using a woodworking file first and then grinding by using 180-mesh abrasive paper, 320-mesh abrasive paper, 600-mesh abrasive paper, and 1000-mesh abrasive paper in sequence; S9, performing painting operation spraying paint after uniformly stirring nitrocellulose lacquer and a paint thinner according to the proportion 1:1, where when the paint is sprayed, the distance between a paint gun and a guitar body is kept at 15 to 20 mm, each polishing of the paint should be consistent with one third of the paint of the previous shot, and the paint should be sprayed uniformly without sagging; S10, mounting a pickup forming a hole in the side of the guitar according to the dimension of a controller of the pickup, so that the pickup can be inlaid into the side perfectly; fixing by using screws, mounting a sensor under a lower bridge, and making the overall lower bridge be in uniform contact with the sensor; connecting the sensor to the controller through an electric wire; mounting an audio jack on the side at the tail of the guitar; fixing the audio jack by using a screw after a hole is drilled. The carbonized side pressed plate bamboo integrated material is prepared by the following steps: performing secondary carbonization treatment on finely planed bamboo strips by using saturated steam by using 140 °C, making the lengths and the radial surfaces of the bamboo strips upward, coating and brushing an adhesive, simultaneously performing bidirectional hot pressing from the two sides, the upper surfaces, and the lower surfaces of the bamboo strips to form a plate, and slicing by a slicing machine to obtain the carbonized side pressed plate bamboo integrated material. The guitar is manufactured by using bamboo, which plays excellent acoustic performance of a vascular bundle-parenchyma cell gradient structure of the bamboo, and is full of interest and special cultural value. The source of raw materials is wide and the price is low. Meanwhile, the pickup and the bamboo guitar are integrated, which can greatly improve the acoustic effect and meet the requirements of different performance scenes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a layout diagram of bass bars on a top in the embodiment of the present disclosure. FIG. 2 is a layout diagram of bass bars on a back in the embodiment of the present disclosure.

DETAILED DESCRIPTION The present disclosure will be described below in combination with specific embodiments. The following embodiments will help those skilled in the art to further understand the present disclosure, but do not limit the present disclosure in any form. It should be noted that, for those skilled in the art, a number of modifications and improvements can also be made without departing from the concept of the present disclosure. All these belong to the scope of protection of the present disclosure. A manufacturing method for a bamboo guitar musical instrument includes the following steps: S1, manufacturing a side taking a carbonized side pressed plate bamboo integrated material with the thickness of 2 mm (which is obtained by performing secondary carbonization treatment on finely planed bamboo strips by using saturated steam by using 140 °C, making the lengths and the radial surfaces of the bamboo strips upward, coating and brushing an adhesive, simultaneously performing bidirectional hot pressing from the two sides, the upper surfaces, and the lower surfaces of the bamboo strips to form a plate, and slicing by a slicing machine), and cutting according to drawing dimensions, where the length direction is consistent with a bamboo texture direction; then, soaking the plate for 15 minutes in warm water at 40 to 45 °C to fully wet the plate; taking out the plate, and immediately wrapping the plate with an aluminum foil to prevent water from evaporating; preheating a bending grinding tool, setting the temperature to be 130 to 135 °C, pressing the plate in place by uniformly bending and stressing, and keeping for 35 minutes to complete the manufacturing of the side of the bamboo guitar; S2, manufacturing a top and a bottom plate S21, coating a suitable amount of plate alignment adhesive after grinding the sides of two carbonized side pressed bamboo integrated plates with the thickness of 3 mm smoothly; splicing the two plates after the two plates are flattened and aligned; simultaneously applying a pressure on the outer surfaces of the two plates when the two plates are spliced, where the two plates are firmly spliced after 12 hours; S22, inputting parameters of the top and the back of the guitar into a laser cutting machine according to a preset CAD drawing of the guitar, and cutting out the top and the back with specified shapes and dimensions; S3, binding and repairing bass bars as shown in FIG. 1, drawing bass bar position lines on the top and the back; then, binding bass bar A, bass bar B, bass bar C, bass bar D, bass bar E , bass bar F, bass bar G, bass bar H, and bass bar I to the corresponding bass bar position lines by using the Titebond, and tightly compressing by using elastic support wood; after completing the mounting treatment of all bass bars, cutting round all edges and corners inside the bass bars by using a hand file, and mounting reinforcing plates between bass bar A and bass bar B, between bass bar A and bass bar G, and between bass bar B and bass bar G, where the thickness of the bass bars close to the edge of the sound barrel is between 1.5 and 2 mm, and small thickness at the edge of the sound barrel is beneficial to vibration; it is to be noted that the glue spilled because of pressure needs to be cleaned at once after the binding treatment of one bass bar is completed, so that the plate surface is clean; S4, closing a barrel and forming S41, aligning the top or the back with the center of a barrel shape, and drawing the positions of the bass bars on the inner side surface of the side by using a pencil; milling to remove scribing parts on the inner side surface of the side through a 3 mm cutter by an edge opener, where it is worth noting that the notch dimensions of the inner side surface of the side are consistent with the thickness of edges of the bass bars; S42, trimming both ends of the bass bars by using a woodworking chisel, and making the bass bars enter the notches in the inner side surface of the side; S43, uniformly coating inner edge strips of the side with Titebond, and adjusting the positions of the top or the back to make the top or the back consistent with the function of the side; then, clamping the two sides of the positions, aligned with the center line of the side, of the top or the back by using F clips, and clamping the four edges with F clips, so that the top or the back are tightly attached to the inner edge strips of the side; after 24 hours, taking down all F clips, and binding the other surface by the same method; S5, manufacturing a finger board cutting and forming fret slots by using Indian rosewood according to a drawing, and wrapping the side surface with pvc; S6, mounting a bridge determining the position of the bridge according to an effective string spacing of the finger board, where the length of string 1 from a nut to a saddle is 652 mm, the center of the bridge needs to be aligned with the center line of the top, and the left and the right are kept balanced; after the position of the bridge is determined, drilling through a string hole on the bridge and a sound barrel top together by using a 5 mm drill bit of an electric hand drill, temporarily fix the bridge with string trees, gently drawing a line along the bridge, marking the position of the bridge, sticking flat along the outside of the line by using an adhesive tape, applying the Titebond to the bottom of the bridge, clamping tightly by using F clips, and keeping for 3 hours; S7, binding the finger board and a handle after completing the mounting of front points and side points of the finger board, horizontally placing the finger board, then placing frets coated with glue into the fret slots, gently knocking by using a hammer, knocking the two sides first and knocking the middle, and gently and repeatedly knocking to inlay the frets into the fret slots, where it is required that there is no gap between the frets and the finger board; finding out a center line on a binding surface of the finger board, aligning the center line with the center line of a neck, aligning the fourteenth fret of the finger board with the link of the neck and the sound barrel, applying the Titebond to the handle, clamping the finger board and the handle by using 3 to 4 woodworking clips, and removing the clips after 3 hours; S8, completing the grinding of the handle, the neck, and the sound barrel, namely, filing by using a woodworking file first and then grinding by using 180-mesh abrasive paper, 320-mesh abrasive paper, 600-mesh abrasive paper, and 1000-mesh abrasive paper in sequence; S9, performing painting operation spraying paint after uniformly stirring nitrocellulose lacquer and a paint thinner according to the proportion 1:1, where when the paint is sprayed, the distance between a paint gun and a guitar body is kept at 15 to 20 mm, each polishing of the paint should be consistent with one third of the paint of the previous shot, and the paint should be sprayed uniformly without sagging; S10, mounting a pickup the pickup is widely used in the guitar, which can transform the vibration of the guitar during playing into an electrical signal and input the electrical signal into an acoustic equipment; because the sensor under the bridge is directly pressed by the rotary vibration, a sound signal outside the guitar will not be mixed in an acoustic signal of the rotary vibration of the guitar to be transmitted to sound equipment together, which ensures the purity of the sound of the musical instrument when the guitar is played. forming a hole in the side of the guitar according to the dimension of a controller of the pickup, so that the pickup can be inlaid into the side perfectly; fixing by using screws, mounting a sensor under a lower bridge, and making the overall lower bridge be in uniform contact with the sensor; connecting the sensor to the controller through an electric wire; mounting an audio jack on the side at the tail of the guitar; fixing the audio jack by using a screw after a hole is drilled. It is worth noting that the materials used for the bamboo guitar are not only limited to the bamboo integrated material, but also include other bamboo recombined materials, such as flattened bamboo, and bamboo composite materials. Especially, other musical instrument bamboo, which are subjected to heat treatment and chemical modification treatment by carbonizing, vegetable oil, and the like and used for improving the acoustic vibration efficiency, the timbre, and the acoustic vibration stability, are also included.

Claims (3)

1. A manufacturing method for a bamboo guitar musical instrument, comprising the following steps:

Si, manufacturing a side

taking a carbonized side pressed plate bamboo integrated material with the thickness of 2 mm, and cutting according to drawing dimensions, wherein the length direction is consistent with a bamboo texture direction; then, soaking the plate for 15 minutes in warm water at 40 to 45 °C to fully wet the plate; taking out the plate, and immediately wrapping the plate with an aluminum foil to prevent water from evaporating; preheating a bending grinding tool, setting the temperature to be 130 to 135 °C, pressing the plate in place by uniformly bending and stressing, and keeping for 35 minutes to complete the manufacturing of the side of the bamboo guitar;

S2, manufacturing a top and a bottom plate

S21, coating a suitable amount of plate alignment adhesive after grinding the sides of two carbonized side pressed bamboo integrated plates with the thickness of 3 mm smoothly; splicing the two plates after the two plates are flattened and aligned; simultaneously applying a pressure on the outer surfaces of the two plates when the two plates are spliced, wherein the two plates are firmly spliced after 12 hours;

S22, inputting parameters of the top and the back of the guitar into a laser cutting machine according to a preset CAD drawing of the guitar, and cutting out the top and the back with specified shapes and dimensions;

S3, binding and repairing bass bars

drawing bass bar position lines on the top and the back; then, binding the bass bars, after being coated with glue, to the corresponding bass bar position lines, and tightly compressing by using elastic support wood; after completing the mounting treatment of all bass bars, grinding sharp edges of the bass bars to make the bass bars smooth and round, wherein the thickness of the bass bars close to the edge of the sound barrel is between 1.5 and 2 mm, and it is to be noted that the glue spilled because of pressure needs to be cleaned at once after the binding treatment of one bass bar is completed, so that the plate surface is clean;

S4, closing a barrel and forming

S41, aligning the top or the back with the center of a barrel shape, drawing the positions of the bass bars on the inner side surface of the side by using a pencil; milling to remove scribing parts on the inner side surface of the side through a 3 mm cutter by an edge opener, wherein it is worth noting that the notch dimensions of the inner side surface of the side are consistent with the thickness of edges of the bass bars;

S42, trimming both ends of the bass bars by using a woodworking chisel, and making the bass bars enter the notches in the inner side surface of the side;

S43, uniformly coating inner edge strips of the side with Titebond, and adjusting the positions of the top or the back to make the top or the back consistent with the function of the side; then, clamping the two sides of the positions, aligned with the center line of the side, of the top or the back by using F clips, and clamping the four edges with F clips, so that the top or the back are tightly attached to the inner edge strips of the side; after 24 hours, taking down all F clips, and binding the other surface by the same method;

S5, manufacturing a finger board

cutting and forming fret slots by using Indian rosewood according to a drawing, and wrapping the side surface with pvc;

S6, mounting a bridge

determining the position of the bridge according to an effective string spacing of the finger board, wherein the length of the string 1 from a nut to a saddle is 652 mm, the center of the bridge needs to be aligned with the center line of the top, and the left and the right are kept balanced;

after the position of the bridge is determined, drilling through a string hole on the bridge and the top of the sound barrel together by using a 5 mm drill bit of an electric hand drill, temporarily fix the bridge with string trees, gently drawing a line along the bridge, marking the position of the bridge, sticking flat along the outside of the line by using an adhesive tape, applying the Titebond to the bottom of the bridge, clamping tightly by using F clips, and keeping for 3 hours;

S7, binding the finger board and a handle

after completing the mounting of front points and side points of the finger board, horizontally placing the finger board, then placing frets coated with glue into the fret slots, gently knocking by using a hammer, knocking the two sides first and knocking the middle, and gently and repeatedly knocking to inlay the frets into the fret slots, wherein it is required that there is no gap between the frets and the finger board;

finding out a center line on a binding surface of the finger board, aligning the center line with the center line of a neck, aligning the fourteenth fret of the finger board with the link of the neck and the sound barrel, applying the Titebond to the handle, clamping the finger board and the handle by using 3 to 4 woodworking clips, and removing the clips after 3 hours;

S8, completing the grinding of the handle, the neck, and the sound barrel, namely, filing by using a woodworking file first and then grinding by using 180-mesh abrasive paper, 320-mesh abrasive paper, 600-mesh abrasive paper, and 1000-mesh abrasive paper in sequence;

S9, performing painting operation

spraying paint after uniformly stirring nitrocellulose lacquer and a paint thinner according to the proportion 1:1, wherein when the paint is sprayed, the distance between a paint gun and a guitar body is kept at 15 to 20 mm, each polishing of the paint should be consistent with one third of the paint of the previous shot, and the paint should be sprayed uniformly without sagging;

S10, mounting of a pickup

forming a hole in the side of the guitar according to the dimension of a controller of the pickup, so that the pickup can be inlaid into the side perfectly; fixing by using screws, mounting a sensor under a lower bridge, and making the overall lower bridge be in uniform contact with the sensor; connecting the sensor to the controller through an electric wire; mounting an audio jack on the side at the tail of the guitar; fixing the audio jack by using a screw after a hole is drilled.

2. The manufacturing method for the bamboo guitar according to claim 1, wherein the carbonized side pressed plate bamboo integrated material is prepared by the following steps:

performing secondary carbonization treatment on finely planed bamboo strips by using saturated steam by using 140°C, making the lengths and the radial surfaces of the bamboo strips upward, coating and brushing an adhesive, simultaneously performing bidirectional hot pressing from the two sides, the upper surfaces, and the lower surfaces of the bamboo strips to form a plate, and slicing by a slicing machine to obtain the carbonized side pressed plate bamboo integrated material.

3. A bamboo guitar musical instrument, wherein the bamboo guitar musical instrument is manufactured by the method according to claim 1.