CN108297237B - Novel composite material violin and manufacturing method thereof - Google Patents
Novel composite material violin and manufacturing method thereof Download PDFInfo
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- CN108297237B CN108297237B CN201810056976.9A CN201810056976A CN108297237B CN 108297237 B CN108297237 B CN 108297237B CN 201810056976 A CN201810056976 A CN 201810056976A CN 108297237 B CN108297237 B CN 108297237B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
- B27M3/0086—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by connecting using glue
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
- G10D3/22—Material for manufacturing stringed musical instruments; Treatment of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
Abstract
The invention belongs to the field of musical instruments, and relates to a novel composite violin and a manufacturing method thereof. The invention adopts two or more of carbon fiber, fibrilia, glass fiber, aramid fiber and basalt fiber as the reinforcing fiber of the composite material, overcomes the defects of large sound difference and low user acceptance of a single fiber composite material violin and the traditional violin, utilizes the synergistic effect of two or more fibers, and adjusts the occupation ratio, position distribution and direction distribution of different fibers in the composite material to manufacture the violin panel, back panel and side panel, wherein the elastic modulus of the violin panel, back panel and side panel is similar to that of a wooden violin, the inherent frequency of the violin panel, back panel and side panel is closer to that of the wooden violin, and the timbre can completely replace the wooden violin and even exceed a part of the wooden violin. Meanwhile, the violin manufactured by the invention also has the advantages of light weight, shock resistance, falling resistance, good weather resistance, reproducible tone quality and easy batch manufacturing.
Description
Technical Field
The invention belongs to the field of musical instruments, and relates to a novel composite violin and a manufacturing method thereof.
Background
According to the data, the yield of violins in China is at least 100 thousands, which consumes a large amount of high-quality natural forest. Pine wood used for a violin panel is over 30 years in the growing period, and the artificially planted pine wood can be used for very few violin materials, and most of the pine wood used at present is natural forest wood; ebony used by the finger board of the violin is also a rare wood, most of the ebony is imported from Brazil and Myanmar, the Brazil government has already issued no export of ebony raw materials at present, and the ebony resource of Myanmar is also sharply reduced; the maple used by the violin backboard is difficult to find at present in China, and violin manufacturers import wood mainly from Russia, Burma and other countries. The price of these precious non-renewable wood materials is also rising as reserves decrease.
In addition, because timber belongs to porous material, the moisture content of timber can be influenced to the height of temperature and humidity, leads to ligneous absorption and dehydration, can lead to ligneous inflation and shrink, causes the change of timber own physical properties, finally influences the tone quality of musical instrument, so the tone quality of wooden musical instrument receives the influence of environment humiture easily, needs frequent maintenance and repeated calibration in the use.
Combining the two reasons, the violin industry is in urgent need to develop new materials which can replace wood. At present, German mezzo-forte company develops stringed instruments such as a carbon fiber violin, a viola and a cello, abandons the appearance of the traditional violin, redesigns the appearance of the violin with simpler forming, and has great difference with the traditional xylophone in tone quality; the carbon fiber violin is also manufactured by the company Limited on carbon fiber bicycle of hawk in hong Kong (patent application No. 201310228266.7), and the carbon fiber violin with a heat-resistant and scratch-resistant layer is manufactured by the company Limited on carbon fiber in Suzhouxing new dimension (application No. 201620333499.2), but the market acceptance of the carbon fiber violin is not high all the time because the rigidity of the carbon fiber is very high and the tone quality of the violin or other stringed instruments made of a single carbon fiber material cannot restore the tone quality of wooden musical instruments.
Disclosure of Invention
The invention aims to provide a novel composite material violin and a manufacturing method thereof aiming at the defects in the prior art.
The technical scheme of the invention is as follows:
the method comprises the following manufacturing steps:
manufacturing violin panel
a) Cutting materials: cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin panel;
b) paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the violin panel, and the thickness of the layer is 0.1-0.2 mm;
(2) the second layer is paved with a frequency adjusting layer, the shape of the frequency adjusting layer is the same as that of the violin panel, the fiber direction is 0 degree and 90 degrees, the fiber direction is 0 degree and is the string direction, the layer material is one or a mixture of a plurality of fibers of carbon fiber, fibrilia or other fibers, the thickness of the layer is 0.3-0.5mm,
(3) a third layer is paved with a thickness adjusting layer, wherein an elliptical or elliptical-like unidirectional prepreg is stacked between two f holes of the violin panel from small to large, the fiber direction is 0 degree or 90 degrees, the fiber direction at 0 degree is the string direction, so that the thickness between the two f holes of the violin panel is gradually thinned from the center to the periphery, the thickness adjusting layer is made of carbon fiber or fibrilia or other fibers or mixed fibers, and the thickness of the layer is changed from 0.6mm to 0.1 mm;
(4) paving and pasting a fourth layer of edge thickening layer, wherein the fourth layer of edge thickening layer is in the shape of a narrow strip with the width of 15mm, paving and pasting prepreg fabric along the edge of the violin panel, the material of the fourth layer of edge thickening layer is carbon fiber, fibrilia or other fibers or mixed fibers, and the thickness of the fourth layer of edge thickening layer is 2-3 mm;
(5) a fifth layer is paved with a sound transmission reflecting layer, the shape of the sound transmission reflecting layer is the same as that of the violin panel, the fiber direction is 0 degree, the fiber direction of 0 degree is the string direction, the material of the layer is carbon fiber, fibrilia or other fibers, and the thickness of the layer is 0.1-0.2 mm;
c) hot-pressing and curing: curing the violin panel according to the curing process of the adopted resin;
d) demoulding, and taking out the violin panel for finishing;
(II) manufacture of violin backboard
a) Cutting materials: cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin back plate,
b) paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the violin backboard, and the thickness of the layer is 0.1-0.2 mm;
(2) the second layer is paved with a frequency adjusting layer, the shape of the frequency adjusting layer is the same as that of the violin backboard, the fiber direction is 0 degree and 90 degrees, the fiber direction of 0 degree is the string direction, the layer material is one or a mixture of carbon fiber, fibrilia or other fibers, and the thickness of the layer is 0.3-0.5 mm;
(3) a third layer is paved with a thickness adjusting layer, the center of the violin back plate is stacked from small to large to form an elliptical or quasi-elliptical unidirectional prepreg, the fiber direction is 0 degree or 90 degrees, the 0 degree direction of the fiber is the string direction, the thickness of the violin back plate is gradually thinned from the center to the periphery, the thickness adjusting layer is made of carbon fiber, fibrilia or other fibers or mixed fiber, and the thickness of the layer is changed from 0.6mm to 0.1 mm;
(4) paving a fourth layer of edge thickening layer in the shape of a narrow strip with the width of 15mm, and paving the fourth layer of edge thickening layer along the edge of the violin backboard, wherein the thickness of the fourth layer is 2-3 mm;
(5) a fifth layer is paved with a sound transmission reflecting layer, the shape of the sound transmission reflecting layer is the same as that of the violin backboard, the fiber direction is 0 degree, the fiber direction of 0 degree is the string direction, the material of the layer is carbon fiber, fibrilia or other fibers, and the thickness of the layer is 0.1-0.2 mm;
c) hot-pressing and curing: curing the violin backboard according to the curing process of the adopted resin;
d) demoulding, and taking out the violin back plate for finishing;
(III) manufacture of violin side plate
a) Cutting materials: cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin side plates,
b) paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is made of carbon fibers, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of a violin side plate, and the thickness of the layer is 0.1-0.2 mm;
(2) the second layer of bonding reinforcing blocks is used for bonding four corner timbers, a top timber and a bottom timber on the surface layer, and the materials are wood blocks or rigid foam;
(3) paving a lining strip layer on the third layer, wherein the width of the lining strip layer is 7-8mm, the lining strip layer is paved and pasted for a circle along the upper edge and the lower edge of each side plate and is respectively used as a bonding surface of the violin panel and the back plate, and the lining strip layer is made of wood skin or prepreg fabric and is 0.5-1.5mm thick;
(4) paving a sound transmission reflecting layer on the fourth layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the side plate, and the thickness of the layer is 0.1-0.2 mm;
c) hot-pressing and curing: curing the violin side plate according to the curing process of the adopted resin;
d) demoulding, and taking out the side plate of the violin for trimming;
gluing, namely gluing all parts of the violin in sequence, wherein the parts comprise a panel, a bass beam, a back plate, a side plate, a fingerboard and a headstock;
(V) coating the surface of the violin by complement grinding;
sixthly, mounting accessories such as a sound post, a tuning peg, a tail post, a tailpiece, strings, a bridge, a chin rest and the like;
and (seventhly) tuning.
The thickness of the violin panel is non-uniform and ranges from 0.5 to 4 mm.
The thickness of the violin back plate is also non-uniform and ranges from 0.5mm to 4 mm.
The thickness of the side plates of the violin is also non-uniform and ranges from 0.3 to 2 mm.
The violin head is made of resin-based composite materials or wood.
The fingerboard material of the violin is resin-based composite material or wood
The chin rest material of the violin is resin-based composite material or wood.
The bass beam material of the violin is resin-based composite material or wood.
The sound column material of the violin is resin-based composite material or wood.
The composite material base for the face plate, back plate, side plate, head, fingerboard, chin rest, bass beam and sound column of the violin
The body is a thermosetting resin or a thermoplastic resin.
Other fibers used for the face plate, back plate, side plate, headstock, fingerboard, chin rest, bass beam and sound column of the violin can be
Is one or a combination of several of glass fiber, aramid fiber and basalt fiber.
The forming process for manufacturing the face plate, the back plate, the side plates, the head, the fingerplate, the chin rest, the bass beam and the sound column of the violin can be die pressing, autoclave and vacuum bag forming or liquid forming, and when the matrix is made of thermoplastic resin, the violin is formed by adopting an injection molding mode.
The invention has the advantages that: the invention adopts two or more of carbon fiber, fibrilia, glass fiber, aramid fiber and basalt fiber as the reinforcing fiber of the composite material, overcomes the defects of large sound difference and low user acceptance of a single fiber composite material violin and the traditional violin, utilizes the synergistic effect of two or more fibers, and adjusts the occupation ratio, position distribution and direction distribution of different fibers in the composite material to manufacture the violin panel, back panel and side panel, wherein the elastic modulus of the violin panel, back panel and side panel is similar to that of a wooden violin, the inherent frequency of the violin panel, back panel and side panel is closer to that of the wooden violin, and the timbre can completely replace the wooden violin and even exceed a part of the wooden violin. Meanwhile, the violin manufactured by the invention also has the advantages of light weight, shock resistance, falling resistance, good weather resistance, reproducible tone quality and easy batch manufacturing.
The specific implementation mode is as follows:
the invention is further explained below, and the manufacturing steps of the method are as follows:
manufacturing violin panel
a) Cutting materials: and cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin panel.
b) Paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the violin panel, and the thickness of the layer is 0.1-0.2 mm;
(2) the second layer is paved with a frequency adjusting layer, the shape of the frequency adjusting layer is the same as that of the violin panel, the fiber direction is 0 degree and 90 degrees, the fiber direction is 0 degree and the string direction, the layer material is a mixed fiber of one or more of carbon fiber, fibrilia or other fibers, the layer material can adjust the vibration frequency of the whole panel to achieve the effect of adjusting the tone color and the volume, the thickness of the layer is 0.3-0.5mm,
(3) the third layer is paved with a thickness adjusting layer, the shape of the third layer is an ellipse or an ellipse similar to the ellipse from small to large, the fiber direction is 0 degree or 90 degrees, the fiber 0 degree direction is the string direction, the paving position is stacked from small to large between two f holes of the violin panel, the thickness of the vibration area of the panel can be adjusted by the material of the third layer, the thickness of the panel is gradually thinned from the center to the periphery, the material of the thickness adjusting layer is carbon fiber or fibrilia or other fibers or mixed fiber, and the thickness of the third layer is transited from 0.6mm to 0.1 mm;
(4) paving a fourth layer of edge thickening layer in the shape of a narrow strip with the width of 15mm, paving and pasting prepreg fabric along the edge of the violin panel, mainly playing the roles of increasing the stability of the panel and preventing deformation, wherein the thickness of the layer is 2-3 mm;
(5) and a fifth layer is paved with a sound transmission reflecting layer, the shape of the sound transmission reflecting layer is the same as that of the panel of the violin, the fiber direction is 0 degree, the fiber direction of 0 degree is the string direction, the material of the material is carbon fiber, fibrilia or other fibers, the material of the material is in direct contact with the resonance cavity of the violin, the effect of increasing sound reflection can be achieved, and the thickness of the layer is 0.1-0.2 mm.
c) Hot-pressing and curing: curing the violin panel according to the curing process of the adopted resin;
d) demoulding, and taking out the violin panel for finishing;
(II) manufacture of violin backboard
a) Cutting materials: and cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin back plate.
b) Paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the violin backboard, and the thickness of the layer is 0.1-0.2 mm;
(2) the second layer is paved with a frequency adjusting layer, the shape of the frequency adjusting layer is the same as that of the violin backboard, the fiber directions are 0 degree and 90 degrees, the fiber direction of 0 degree is the string direction, the layer material is a mixed fiber of one or more of carbon fiber, fibrilia or other fibers, the layer material can adjust the vibration frequency of the whole backboard, the effect of adjusting the tone and the volume is achieved, and the thickness of the layer is 0.3-0.5 mm;
(3) the third layer is paved with a thickness adjusting layer, the shape of the third layer is an ellipse or an ellipse similar to the ellipse from small to large, the fiber direction is 0 degree or 90 degrees, the fiber 0 degree direction is the string direction, the paving position is stacked from small to large from the center of the violin backboard, the layer material can adjust the thickness of the vibration area of the backboard, so that the thickness of the backboard becomes thinner gradually from the center to the periphery, the thickness adjusting layer is made of carbon fiber or fibrilia or other fibers or mixed fiber, and the thickness of the layer is transited from 0.6mm to 0.1 mm;
(4) paving an edge thickening layer in the shape of a narrow strip with the width of 15mm on the fourth layer, paving and pasting prepreg fabrics along the edge of the violin backboard, mainly playing the roles of increasing the stability of the backboard and preventing deformation, wherein the thickness of the layer is 2-3 mm;
(5) and a fifth layer is paved with a sound transmission reflecting layer, the shape of the sound transmission reflecting layer is the same as that of the violin backboard, the fiber direction is 0 degree, the fiber 0 degree direction is the string direction, the material of the material is carbon fiber, fibrilia or other fibers, the material of the material is in direct contact with the resonance cavity of the violin, the effect of increasing sound reflection can be achieved, and the thickness of the layer is 0.1-0.2 mm.
c) Hot-pressing and curing: curing the violin backboard according to the curing process of the adopted resin;
d) demoulding, and taking out the violin back plate for finishing;
(III) manufacture of violin side plate
a) Cutting materials: and cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin side plates.
b) Paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is made of carbon fibers, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of a violin side plate, and the thickness of the layer is 0.1-0.2 mm;
(2) the second layer of bonding reinforcing blocks is used for bonding four corner timbers, a top timber and a bottom timber on the surface layer, and the materials are wood blocks or rigid foam;
(3) paving a lining strip layer on the third layer, wherein the width of the lining strip layer is 7-8mm, the lining strip layer is paved and pasted for a circle along the upper edge and the lower edge of each side plate and is respectively used as a bonding surface of the violin panel and the back plate, and the lining strip layer is made of wood skin or prepreg fabric and is 0.5-1.5mm thick;
(4) paving a sound transmission reflecting layer on the fourth layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the side plate, and the thickness of the layer is 0.1-0.2 mm;
c) hot-pressing and curing: curing the violin side plate according to the curing process of the adopted resin;
d) demoulding, and taking out the side plate of the violin for trimming;
gluing, namely gluing all parts of the violin in sequence, wherein the parts comprise a panel, a bass beam, a back plate, a side plate, a fingerboard and a headstock;
(V) coating the surface of the violin by complement grinding;
and (VI) mounting accessories such as a sound post, a tuning peg, a tail post, a tailpiece, strings, a bridge, a chin rest and the like.
And (seventhly) tuning.
Examples
In the embodiment, the 0-degree direction of the violin panel and back plate layer is the string direction of the violin.
In the embodiment, the prepreg sheets of the surface layer, the frequency adjusting layer and the sound transmission reflecting layer of the violin panel are the same as the violin panel in shape, the violin panel thickness adjusting layer is in an oval shape with different sizes, the violin panel thickness adjusting layer is formed by stacking from small to large between two f holes of the panel, the thickening layer on the edge of the violin panel is a narrow strip with the width of 15mm, and the strip is laid and pasted along the edge of the violin panel.
In the embodiment, the prepreg sheets of the surface layer, the frequency adjusting layer and the sound transmission reflecting layer of the violin backboard are the same as the violin backboard in shape, the violin backboard thickness adjusting layer is in an oval shape with different sizes and is formed by stacking from small to large from the center of the backboard, and the thickening layer on the edge of the violin backboard is a narrow strip with the width of 15mm and is paved along the edge of the violin backboard.
In the embodiment, the prepreg sheet of the surface layer and the sound transmission reflection layer of the violin side plate has the same shape as the violin side plate, the width of the lining strip layer is 7-8mm, and the lining strip layer is paved and adhered for a circle along the upper edge and the lower edge of the side plate respectively (as the adhering surface of the back plate of the violin panel).
Example 1: making violins from carbon fiber and hemp fiber
And cutting carbon fiber and fibrilia prepreg sheets with corresponding shapes and quantities according to the shapes and thickness distribution of the violin panel, the back panel and the side panels.
The panel plies are as shown in the table below:
| panel layer | Material | Thickness of |
| Surface layer | Carbon fiber plain prepreg | 0.2mm |
| Frequency adjusting layer | Carbon-hemp mixed fiber prepreg with fiber directions of 0 degree and 90 degrees | 0.5mm |
| Thickness adjusting layer | Carbon-hemp mixed fiber prepreg with fiber direction of 0 ° | 0.4mm |
| Edge thickening layer | Carbon fiber prepreg | 3mm |
| Sound transmission reflecting layer | 0-degree carbon fiber prepreg | 0.1mm |
The backsheet lay-up is shown in the following table:
the side panel plies are as shown in the table below:
| side panel paving layer | Material | Thickness of |
| Surface layer | Carbon fiber woven prepreg | 0.2mm |
| Corner wood, top wood and bottom wood | Wood block | - |
| Liner layer | Wood veneer | 1mm |
| Sound transmission reflecting layer | 0-degree carbon fiber prepreg | 0.1mm |
And curing the paved face plate, back plate and side plate for 60min at the temperature of 130 ℃ under the pressure of 2 MPa. And demolding, taking out and trimming. Then gluing, painting, fitting and tuning are carried out.
Example 2: making violins from carbon fiber and hemp fiber
The preparation method in example 1 was used.
The panel plies are as shown in the table below:
| name of ply | Material | Thickness of |
| Surface layer | Carbon fiber twill prepreg | 0.2mm |
| Frequency adjusting layer | Fibrilia prepreg with fiber directions of 0 ° and 90 ° | 0.5mm |
| Thickness adjusting layer | Carbon-hemp mixed fiber prepreg with fiber direction of 0 ° | 0.4mm |
| Edge thickening layer | Carbon fiber fabric prepreg | 2mm |
| Sound transmission reflecting layer | 0-degree carbon fiber prepreg | 0.1mm |
The backsheet lay-up is shown in the following table:
| name of ply | Material | Thickness of |
| Surface layer | Carbon fiber twill prepreg | 0.2mm |
| Frequency adjusting layer | Carbon fiber prepreg having fiber directions of 0 DEG and 90 DEG | 0.4mm |
| Thickness adjusting layer | Prepreg of hemp fiber with fiber direction of 0 ° | 0.4mm |
| Edge thickening layer | Carbon fiber fabric prepreg | 2mm |
| Sound transmission reflecting layer | 0-degree fibrilia prepreg | 0.2mm |
The side panel plies are as shown in the table below:
and curing the face plate, the back plate and the side plates for 10min at 130 ℃ under the pressure of 2 MPa. And demolding, taking out and trimming.
Then gluing, painting, fitting and tuning are carried out.
Example 3: manufacturing glass fiber and fibrilia violin
The preparation method in example 1 was used.
The panel plies are as shown in the table below:
| panel layer | Material | Thickness of |
| Surface layer | Glass fiber plain prepreg | 0.2mm |
| Frequency adjusting layer | The fiber direction of the glass fiber and hemp mixed-woven fiber prepreg is 0 degree and 90 degrees | 0.5mm |
| Thickness adjusting layer | Glass fiber and hemp mixed fiber prepreg with fiber direction of 0 DEG | 0.4mm |
| Edge thickening layer | Glass fiber prepreg | 3mm |
| Sound transmission reflecting layer | 0-degree glass fiber prepreg | 0.1mm |
The backsheet lay-up is shown in the following table:
| back board paving layer | Material | Thickness of |
| Surface layer | Glass fiber plain prepreg | 0.2mm |
| Frequency adjusting layer | Fibrilia prepreg with fiber directions of 0 ° and 90 ° | 0.5mm |
| Thickness adjusting layer | Glass fiber and hemp mixed fiber prepreg with fiber direction of 0 DEG | 0.4mm |
| Edge thickening layer | Glass fiber fabric prepreg | 3mm |
| Sound transmission reflecting layer | 0-degree fibrilia prepreg | 0.2mm |
The side panel plies are as shown in the table below:
| side panel paving layer | Material | Thickness of |
| Surface layer | Glass fiber woven prepreg | 0.2mm |
| Corner wood, top wood and bottom wood | Wood block | - |
| Liner layer | Wood veneer | 1mm |
| Sound transmission reflecting layer | 0-degree glass fiber prepreg | 0.1mm |
And curing the paved face plate, back plate and side plate for 60min at the temperature of 130 ℃ under the pressure of 2 MPa. And demolding, taking out and trimming. Then gluing, painting, fitting and tuning are carried out.
Example 4: manufacturing glass fiber and fibrilia violin
The preparation method in example 1 was used.
The panel plies are as shown in the table below:
| name of ply | Material | Thickness of |
| Surface layer | Glass fiber twill prepreg cloth | 0.2mm |
| Frequency adjusting layer | Fibrilia prepreg with fiber directions of 0 ° and 90 ° | 0.5mm |
| Thickness adjusting layer | Glass fiber and hemp mixed fiber prepreg with fiber direction of 0 DEG | 0.4mm |
| Edge thickening layer | Glass fiber fabric prepreg | 2mm |
| Sound transmission reflecting layer | 0-degree glass fiber prepreg | 0.1mm |
The backsheet lay-up is shown in the following table:
| name of ply | Material | Thickness of |
| Surface layer | Glass fiber twill prepreg cloth | 0.2mm |
| Frequency adjusting layer | Glass fiber prepreg having fiber directions of 0 DEG and 90 DEG | 0.4mm |
| Thickness adjusting layer | Prepreg of hemp fiber with fiber direction of 0 ° | 0.4mm |
| Edge thickening layer | Glass fiber fabric prepreg | 2mm |
| Sound transmission reflecting layer | 0-degree fibrilia prepreg | 0.2mm |
The side panel plies are as shown in the table below:
| side panel paving layer | Material | Thickness of |
| Surface layer | Glass fiber twill prepreg cloth | 0.2mm |
| Corner wood, top wood and bottom wood | Rigid foam | - |
| Liner layer | Glass fiber fabric prepreg | 1mm |
| Sound transmission reflecting layer | 0-degree glass fiber prepreg | 0.1mm |
And curing the face plate, the back plate and the side plates for 10min at 130 ℃ under the pressure of 2 MPa. And demolding, taking out and trimming.
Then gluing, painting, fitting and tuning are carried out.
Example 5: method for manufacturing carbon fiber, hemp fiber and glass fiber violin
And cutting carbon fiber and fibrilia prepreg sheets with corresponding shapes and quantities according to the shapes and thickness distribution of the violin panel, the back panel and the side panels.
The panel plies are as shown in the table below:
the backsheet lay-up is shown in the following table:
| back board paving layer | Material | Thickness of |
| Surface layer | Carbon fiber plain prepreg | 0.2mm |
| Sound adjusting layer | Prepreg of fibrilia, direction of fiberIs 0 DEG and 90 DEG | 0.5mm |
| Thickness adjusting layer | Carbon fiber and glass fiber mixed-woven fiber prepreg with fiber direction of 0 DEG | 0.4mm |
| Edge thickening layer | Carbon fiber fabric prepreg | 3mm |
| Sound transmission reflecting layer | 0-degree fibrilia prepreg | 0.2mm |
The side panel plies are as shown in the table below:
| side panel paving layer | Material | Thickness of |
| Surface layer | Carbon fiber woven prepreg | 0.2mm |
| Corner wood, top wood and bottom wood | Wood block | - |
| Liner layer | Wood veneer | 1mm |
| Sound transmission reflecting layer | 0-degree carbon fiber prepreg | 0.1mm |
And curing the paved face plate, back plate and side plate for 60min at the temperature of 130 ℃ under the pressure of 2 MPa. And demolding, taking out and trimming. Then gluing, painting, fitting and tuning are carried out.
Example 6: violin made by liquid forming method
The laminate was prepared by the method of example 1, except that dry fibers were used instead of prepregs for the lay-up, and then the resin was added by pouring or suction-injection, and finally cured. And demolding, taking out and trimming. And then performing gluing, painting and fitting, and completing tuning.
Example 7: production of violins using thermoplastic prepreg
Using a thermoplastic resin prepreg, the laminate was produced by the method of laying in reference to example 1, and finally cured. And demolding, taking out and trimming. And then performing gluing, painting and fitting, and completing tuning.
Claims (12)
1. A manufacturing method of a novel composite violin is characterized by comprising the following manufacturing steps:
manufacturing violin panel
a) Cutting materials: cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin panel;
b) paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the violin panel, and the thickness of the layer is 0.1-0.2 mm;
(2) a second layer of frequency adjusting layer is paved and pasted, the shape of the second layer of frequency adjusting layer is the same as that of the violin panel, the layer of material is a mixed fiber made of at least two fibers, the fibers are selected from carbon fibers, fibrilia or other fibers, the thickness of the layer is 0.3-0.5mm, the fiber directions are 0 degree and 90 degrees, and the fiber direction of 0 degree is the string direction;
(3) a third layer is paved with a thickness adjusting layer, wherein an elliptical or elliptical-like unidirectional prepreg is stacked between two f holes of the violin panel from small to large, the fiber direction is 0 degree or 90 degrees, the fiber direction at 0 degree is the string direction, so that the thickness between the two f holes of the violin panel is gradually thinned from the center to the periphery, the thickness adjusting layer is made of carbon fiber or fibrilia or other fibers or mixed fibers, and the thickness of the layer is changed from 0.6mm to 0.1 mm;
(4) paving and pasting a fourth layer of edge thickening layer, wherein the fourth layer of edge thickening layer is in the shape of a narrow strip with the width of 15mm, paving and pasting prepreg fabric along the edge of the violin panel, the material of the fourth layer of edge thickening layer is carbon fiber, fibrilia or other fibers or mixed fibers, and the thickness of the fourth layer of edge thickening layer is 2-3 mm;
(5) a fifth layer is paved with a sound transmission reflecting layer, the shape of the sound transmission reflecting layer is the same as that of the violin panel, the fiber direction is 0 degree, the fiber direction of 0 degree is the string direction, the material of the layer is carbon fiber, fibrilia or other fibers, and the thickness of the layer is 0.1-0.2 mm;
c) hot-pressing and curing: curing the violin panel according to the curing process of the adopted resin;
d) demoulding, and taking out the violin panel for finishing;
(II) manufacture of violin backboard
a) Cutting materials: cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin back plate,
b) paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the violin backboard, and the thickness of the layer is 0.1-0.2 mm;
(2) a second layer of frequency adjusting layer is laid and pasted, the shape of the second layer of frequency adjusting layer is the same as that of the violin backboard, the layer of material is a mixed fiber made of at least two fibers, the fibers are selected from carbon fibers, fibrilia or other fibers, the thickness of the layer is 0.3-0.5mm, the fiber directions are 0 degree and 90 degrees, and the fiber direction of 0 degree is the string direction;
(3) a third layer is paved with a thickness adjusting layer, the center of the violin back plate is stacked from small to large to form an elliptical or quasi-elliptical unidirectional prepreg, the fiber direction is 0 degree or 90 degrees, the 0 degree direction of the fiber is the string direction, the thickness of the violin back plate is gradually thinned from the center to the periphery, the thickness adjusting layer is made of carbon fiber, fibrilia or other fibers or mixed fiber, and the thickness of the layer is changed from 0.6mm to 0.1 mm;
(4) paving a fourth layer of edge thickening layer in the shape of a narrow strip with the width of 15mm, and paving the fourth layer of edge thickening layer along the edge of the violin backboard, wherein the thickness of the fourth layer is 2-3 mm;
(5) a fifth layer is paved with a sound transmission reflecting layer, the shape of the sound transmission reflecting layer is the same as that of the violin backboard, the fiber direction is 0 degree, the fiber direction of 0 degree is the string direction, the material of the layer is carbon fiber, fibrilia or other fibers, and the thickness of the layer is 0.1-0.2 mm;
c) hot-pressing and curing: curing the violin backboard according to the curing process of the adopted resin;
d) demoulding, and taking out the violin back plate for finishing;
(III) manufacture of violin side plate
a) Cutting materials: cutting prepreg sheets with corresponding shapes and numbers according to the shape and thickness distribution of the violin side plates,
b) paving:
(1) paving a surface layer on the first layer, and paving a prepreg fabric, wherein the prepreg fabric is made of carbon fibers, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of a violin side plate, and the thickness of the layer is 0.1-0.2 mm;
(2) the second layer of bonding reinforcing block bonds four corner timbers, a top timber and a bottom timber on the upper part of the surface layer, and the materials are wood blocks or rigid foam;
(3) paving a lining strip layer on the third layer, wherein the width of the lining strip layer is 7-8mm, the lining strip layer is paved and pasted for a circle along the upper edge and the lower edge of each side plate and is respectively used as a bonding surface of the violin panel and the back plate, and the lining strip layer is made of wood skin or prepreg fabric and is 0.5-1.5mm thick;
(4) paving a sound transmission reflecting layer on the fourth layer, and paving a prepreg fabric, wherein the prepreg fabric is carbon fiber, fibrilia or other fibers, the shape of the prepreg fabric is the same as that of the side plate, and the thickness of the layer is 0.1-0.2 mm;
wherein, other fibers used by the faceplate, the back plate and the side plate of the violin are one or a combination of a plurality of glass fibers, aramid fibers and basalt fibers;
c) hot-pressing and curing: curing the violin side plate according to the curing process of the adopted resin;
d) demoulding, and taking out the side plate of the violin for trimming;
gluing, namely gluing all parts of the violin in sequence, wherein the parts comprise a panel, a bass beam, a back plate, a side plate, a fingerboard and a headstock;
(V) coating the surface of the violin by complement grinding;
sixthly, mounting accessories of the sound post, the tuning peg, the tail post, the tailpiece, the strings, the bridge and the chin rest;
and (seventhly) tuning.
2. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the thickness of the violin panel is not uniform and ranges from 0.5 to 4 mm.
3. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the thickness of the violin back is also non-uniform, ranging from 0.5 to 4 mm.
4. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the thickness of the side plates of the violin is also non-uniform, ranging from 0.3 to 2 mm.
5. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the violin head is made of resin-based composite materials or wood.
6. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the fingerboard material of the violin is resin-based composite material or wood.
7. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the chin rest material of the violin is resin-based composite material or wood.
8. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the bass beam material of the violin is resin-based composite material or wood.
9. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the bass beam material of the column of the violin is a resin-based composite material or wood.
10. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the composite material matrix used by the face plate, the back plate, the side plate, the head, the fingerboard, the chin rest, the bass beam and the sound column of the violin is thermosetting resin or thermoplastic resin.
11. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the violin is characterized in that other fibers used by a violin head, a fingerboard, a chin rest, a bass beam and a sound column are one or a combination of a plurality of glass fibers, aramid fibers and basalt fibers.
12. The manufacturing method of the novel composite violin according to claim 1, characterized in that: the forming process for manufacturing the face plate, the back plate, the side plates, the head, the fingerboard, the chin rest, the bass beam and the sound column of the violin is mould pressing, autoclave, vacuum bag forming or liquid forming, and when the matrix is thermoplastic resin, the violin is formed by adopting an injection molding mode.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103280210A (en) * | 2013-06-07 | 2013-09-04 | 连云港神鹰碳纤维自行车有限责任公司 | Method of manufacturing violin by using carbon fiber composites |
| CN103413541A (en) * | 2013-08-31 | 2013-11-27 | 连云港神鹰碳纤维自行车有限责任公司 | Method of making guitar with carbon fiber reinforced composite materials |
| CN103440858A (en) * | 2013-08-31 | 2013-12-11 | 连云港神鹰碳纤维自行车有限责任公司 | Method for manufacturing guitar with carbon fiber and glass fiber prepreg in composite mode |
| CN106328102A (en) * | 2016-10-27 | 2017-01-11 | 李焕强 | Carbon fiber guitar and making method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106466947B (en) * | 2015-08-21 | 2019-10-25 | 华为技术有限公司 | A kind of composite material and preparation method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280210A (en) * | 2013-06-07 | 2013-09-04 | 连云港神鹰碳纤维自行车有限责任公司 | Method of manufacturing violin by using carbon fiber composites |
| CN103413541A (en) * | 2013-08-31 | 2013-11-27 | 连云港神鹰碳纤维自行车有限责任公司 | Method of making guitar with carbon fiber reinforced composite materials |
| CN103440858A (en) * | 2013-08-31 | 2013-12-11 | 连云港神鹰碳纤维自行车有限责任公司 | Method for manufacturing guitar with carbon fiber and glass fiber prepreg in composite mode |
| CN106328102A (en) * | 2016-10-27 | 2017-01-11 | 李焕强 | Carbon fiber guitar and making method thereof |
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