Carbon fiber reinforced nylon flute tail tube and preparation method thereof

Abstract

The invention discloses a carbon fiber reinforced nylon flute tail tube and a preparation method thereof. The flute tail tube is made of a carbon fiber reinforced nylon composite material formed by nylon, carbon fibers and glass fibers. The preparation method comprises the following steps: preparing raw materials for preparing the carbon fiber reinforced nylon composite material, including nylon, carbon fiber and glass fiber, grinding the three raw materials into powder, and uniformly mixing to obtain raw material mixed powder; the raw material mixed powder is put into a material bin of a 3D printer to be preheated; and after preheating is finished, a 3D printer is used for forming the flute tail pipe according to the preset flute tail pipe structure shape through the fused deposition 3D printing technology. The carbon fiber reinforced nylon composite material is used for replacing the original material of the tail pipe of the flute, so that the flute can maintain the original tone, the weight can be reduced, the flute is corrosion-resistant, and the comfort of a player is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind instrument manufacturing, and in particular to a carbon fiber reinforced nylon flute tail pipe and a preparation method thereof. Background Art

[0002] The flute is a wind instrument. The timbre of the flute is bright in the treble range, ethereal in the middle range, and warm and soft in the bass range. It is one of the most important instruments in the treble part of a symphony orchestra. The timbre of the flute has a unique texture. In order to obtain good sound quality, in addition to the performer's excellent playing skills, the material used to make the instrument is also particularly important, so as to provide the instrument with high-quality resonance effects and form a soft and bright timbre.

[0003] The structure of the flute can be disassembled into three parts for easy carrying and repair: the blowing part (mouthpiece), the main tube, and the tail tube. The musical instruments currently produced on the market are often made of metals, such as copper alloys, silver alloys, etc.; wood such as ebony, etc. High-quality and stable metal materials have high density and relatively large weight. Many flute players will suffer from varying degrees of muscle strain in their hands, such as wrists or fingers, during high-intensity and long-term practice. If the posture of holding the instrument is incorrect or non-standard, severe cases may lead to hand diseases such as tenosynovitis. The tone of wooden flutes is softer, more delicate, and warmer than that of metal flutes, but flutes made of metal are more common and common. Secondly, wooden products are easily affected by temperature and humidity, causing them to crack and corrode, and their relatively low output is not within the scope of consideration for this experiment.

[0004] The material of a musical instrument is one of the main reasons that determine its timbre. After studying the structure of the flute, we originally considered replacing the material of the flute keys, hoping that the flute could retain its original timbre to a large extent while reducing its weight. However, after research and experiments, we found that due to the small size, high precision and practical needs of the flute keys, despite many attempts and debugging, the keys made of various innovative printing materials could not well restore the use effect of metal keys. Summary of the invention

[0005] The purpose of the present invention is to provide a carbon fiber reinforced nylon flute tail tube and a preparation method thereof, using carbon fiber reinforced nylon composite materials to replace the original material of the flute tail tube, and using 3D printing technology to accurately and conveniently prepare a structure that can replace the original flute tail tube, so that the instrument can achieve the purpose of weight reduction without affecting the timbre of the flute.

[0006] To achieve the above purpose, the technical solution provided by the present invention is:

[0007] A first aspect of the present application provides a carbon fiber reinforced nylon flute tail tube, wherein the material of the flute tail tube adopts a carbon fiber reinforced nylon composite material formed by nylon, carbon fiber and glass fiber.

[0008] In the carbon fiber reinforced nylon composite material, the composition ratios of nylon, carbon fiber and glass fiber are 55-64 parts: 23-27 parts: 27-33 parts respectively by mass.

[0009] The second aspect of the present application provides a method for preparing a carbon fiber reinforced nylon flute tail tube, comprising the following steps:

[0010] Step S1: preparing raw materials for making carbon fiber reinforced nylon composite materials, including nylon, carbon fiber and glass fiber, grinding the three raw materials into powder and uniformly mixing them to obtain raw material mixed powder;

[0011] Step S2: loading the raw material mixed powder into the material bin of the 3D printer and preheating it;

[0012] Step S3: After the preheating is completed, a 3D printer is used to shape the flute tail tube according to the preset flute tail tube structure shape using fused deposition 3D printing technology.

[0013] To optimize the above technical solutions, the specific measures taken also include:

[0014] The method of forming the flute tail tube by using the fused deposition 3D printing technology includes three stages: melting, deposition and forming:

[0015] After the raw material mixed powder is heated and melted by a melting device, the molten composite carbon fiber high-performance nylon material is extruded from the nozzle;

[0016] Deposition and printing are performed layer by layer according to the printing path set by the computer modeling and slicing software according to the structural shape of the flute tail tube;

[0017] Finally, the molten composite carbon fiber high-performance nylon material is cooled and solidified to obtain the final carbon fiber reinforced nylon flute tail tube. The carbon fiber reinforced nylon composite material is used to make the flute tail tube.

[0018] In step S2, the preheating temperature range is 199-235°C, and the preheating time is 5-10 minutes; in step S3, the heating melting temperature range of fused deposition 3D printing is 250-280°C, the layer-by-layer deposition printing speed is 30-60 mm / s, and the thickness of each deposition layer is between 0.15 and 0.3 mm.

[0019] The nylon is PA12, and the specific preparation method is to use butadiene as the matrix, melt it through an injection molding process, the melting temperature is 240-300°C, and then dry it to shape it.

[0020] The raw materials for preparing the carbon fiber include acrylic fiber and viscose fiber, and the mass ratio of acrylic fiber to viscose fiber is 62-87:13-38. The preparation method is to mix the raw materials and then prepare the carbon fiber through the following three stages:

[0021] First, pre-oxidation is carried out in air at 200-300°C for 28-65 minutes;

[0022] Then, heat treatment is performed at a high temperature of 1600-1800°C to carbonize the steel for 2-8 minutes;

[0023] Finally, heat treatment is continued at a high temperature of 2600-3000°C to form carbon fibers for 25-45 minutes.

[0024] The raw material for preparing the viscose fiber is pulp, and the preparation method is: immersing the pulp in an alkaline aqueous solution to generate alkali cellulose, allowing the alkali cellulose to react with carbon disulfide to generate cellulose sulfonate, that is, obtaining viscose; extruding the viscose through a spinning machine spinneret and then entering a coagulation bath, allowing the viscose to solidify in the coagulation bath to form fibers.

[0025] The pulp is cotton pulp, wood pulp or a mixture thereof; the alkaline aqueous solution is a 16-20% sodium hydroxide aqueous solution; the coagulation bath is an aqueous solution prepared by mixing sulfuric acid and sodium sulfate in a volume ratio of 1-1.2:1-1.2; and the extrusion speed of the spinning machine spinneret is 120-140 m / min.

[0026] The preparation method of the glass fiber is as follows: inorganic ore is crushed and melted to 1500-2000°C to prepare a glass solution, and then the solution is drawn into glass fiber strands with a diameter of 3-80 μm after removing bubbles, and the drawing speed is 1000-3000 m / min.

[0027] After the tail tube of the flute is shaped by using the fused deposition 3D printing technology and polished to make it smooth, a protective paint is sprayed on the surface.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a carbon fiber reinforced nylon flute tail tube and a preparation method thereof, using a carbon fiber reinforced nylon composite material to replace the original material of the flute tail tube. The carbon fiber reinforced nylon composite material used in the present invention has a low density, and the flute tail tube made of it is lighter than the traditional metal tail tube, which can achieve a weight reduction effect. The flute is divided into three parts: the mouthpiece, the main body tube and the tail tube. The present invention uses a high-performance carbon fiber reinforced nylon tail tube to replace the traditional metal tail tube to reduce the weight of the tail tube, thereby changing the center of gravity distribution of the entire flute, so that the performer can have a more comfortable use experience when playing for a long time.

[0030] Compared with metal materials, wooden materials and the like, the flute tail tube made of the carbon fiber reinforced nylon composite material of the present invention has stable chemical properties and is not easily corroded by water vapor and hand sweat generated when the player uses the instrument; moreover, the flute tail tube made of the carbon fiber reinforced nylon composite material of the present invention has a low water absorption rate, is less affected by water vapor in the air, has stable dimensions, and can be used normally in humid areas; and is much less affected by external temperature changes than metal materials. Therefore, the flute tail tube made of the present invention has good reliability, provides good support for other parts of the flute, and can stabilize the timbre.

[0031] The present invention also verifies that the carbon fiber reinforced nylon flute tail tube made of carbon fiber reinforced nylon composite material can maintain good timbre. The carbon fiber reinforced nylon tail tube prepared by the present invention has high hardness and can withstand the force used by the player during normal playing.

[0032] The scheme of the present invention can provide players with a more comfortable and relaxed playing experience, alleviate the risk of hand fatigue and hand diseases caused by players playing instruments for a long time, and at the same time seek sustainable development of musical instrument manufacturing materials; according to the needs of players, the carbon fiber reinforced nylon tail tube can be painted to achieve personalized color customization, further improving its commercial value and popularity. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 : A schematic flow chart of a method for preparing a carbon fiber reinforced nylon flute tail tube of the present invention. DETAILED DESCRIPTION

[0034] The above contents of the present invention are further described in detail below in the form of embodiments, but this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the above contents of the present invention belong to the scope of the present invention.

[0035] The experimental methods used in the following examples are all conventional methods unless otherwise specified, and the reagents, methods and equipment used are all conventional reagents, methods and equipment in the technical field unless otherwise specified.

[0036] Example 1

[0037] The embodiment of the present invention provides a flute tail tube made of high-performance carbon fiber reinforced nylon.

[0038] The preparation method comprises the following steps:

[0039] 1. Creation of 3D Model

[0040] After removing the key part of the traditional flute tail pipe and cleaning the pipe body, the dimensions of each part of the tail pipe were measured, and a three-dimensional model of the tail pipe was made using digital modeling technology for setting the 3D printing path.

[0041] (II) Preparation of high-performance carbon fiber reinforced nylon materials

[0042] S1. Preparation of PA12:

[0043] It is based on butadiene and is prepared by injection molding.

[0044] The melting temperature is 270°C and it is shaped and used after drying.

[0045] S2. Preparation of viscose fiber:

[0046] The spinning solution is coagulated by a coagulation bath through a fine stream of a spinneret, and chemical changes occur at the same time to form fibers. The process is as follows:

[0047] The raw material for preparing viscose fiber is pulp, and the preparation method is: immersing the pulp in an alkaline aqueous solution to generate alkali cellulose, allowing the alkali cellulose to react with carbon disulfide to generate cellulose sulfonate viscose; extruding the viscose through a spinning machine spinneret and then entering a coagulation bath, allowing the viscose to solidify in the coagulation bath to form viscose fiber.

[0048] The alkaline aqueous solution is a 17% sodium hydroxide aqueous solution; the coagulation bath is prepared by preparing sulfuric acid and sodium sulfate in equal proportions into an aqueous solution.

[0049] S3. Preparation of carbon fiber:

[0050] It is made of acrylic and viscose fibers after high-temperature oxidation and carbonization, with the mass ratio of acrylic to viscose being 75:25; it is first pre-oxidized in air at 250°C for 40 minutes;

[0051] Then, it was heat treated at a high temperature of 1700°C for 5 minutes to carbonize it;

[0052] Finally, heat treatment is continued at a high temperature of 2800°C for 30 minutes to form carbon fibers.

[0053] S4. Preparation of glass fiber:

[0054] Inorganic ore is melted to make glass solution. The solution is melted to 1800℃ to make glass solution. After the bubbles are removed, a porous plate is used to draw the glass fiber strands with a diameter of 20 to 60 μm at high speed. The drawing speed is 2000 m / min.

[0055] (III) Preparation of high performance carbon fiber reinforced nylon flute tail tube:

[0056] Using the PA12 and carbon fiber materials prepared in step (ii), the three-dimensional model of the tail pipe prepared in step (i) is introduced into a 3D printing machine; after the raw materials are polished and evenly mixed to form a raw material mixed powder, it is formed by fused deposition modeling (FDM), and the steps are as follows:

[0057] After the raw material mixed powder is heated and melted by a melting device, the molten composite carbon fiber high-performance nylon material is extruded from the nozzle;

[0058] Deposition and printing are performed layer by layer according to the printing path set by the computer modeling and slicing software according to the structural shape of the flute tail tube;

[0059] After the molten composite carbon fiber high-performance nylon material is cooled and solidified, the final carbon fiber reinforced nylon flute tail tube is obtained.

[0060] The mass composition ratio of the raw material mixed powder is: nylon, carbon fiber and glass fiber 60:25:30;

[0061] The preheating temperature is 210°C and the preheating time is 8 minutes. The heating melting temperature range of fused deposition 3D printing is 270°C, the layer-by-layer deposition printing speed is 45mm / s, and the thickness of each deposition layer is about 0.2mm.

[0062] After printing, tap the reserved holes in the flute tail tube corresponding to the internal threads of the original metal tail tube key column and install the screw sleeves. Drill holes and install needle springs at the spring installation locations corresponding to the original sound columns, in preparation for the next step of installing the other structural parts of the flute to form the entire flute. Then polish the finished tail tube and spray it with protective paint. Then, combine and install the other metal tube body parts, metal keys and the finished flute tail tube, and make overall adjustments to ensure the normal performance of the instrument.

[0063] Example 2

[0064] The timbre and weight of the flute tail tube prepared in Example 1 of the present invention are compared with those of the traditional flute tail tube:

[0065] (I) Tone

[0066] In terms of timbre, the flute belongs to the category of wind instruments with holes, and is a typical edge instrument. The principle of its sound generation is as follows: the player blows out air from the mouthpiece of the flute head, and the airflow collides with the edge of the mouthpiece at a specific angle to produce edge sound, which is then reflected by the flute head sound reflector to the inner wall of the tube body, causing the air column in the tube to vibrate and produce sound. The tail tube is used to close the sound hole and change the effective tube length of the instrument so that the instrument can produce different pitches. Therefore, the material of the flute tail tube has no significant effect on the flute's timbre. Using high-performance carbon fiber reinforced nylon to make the flute tail tube does not change the flute's timbre, which is convenient for the player's daily learning and use.

[0067] Compared with metal materials, wooden materials and the like, the flute tail tube made of the carbon fiber reinforced nylon composite material has stable chemical properties and is not easily corroded by water vapor and hand sweat generated when the player uses the instrument. In addition, the flute tail tube made of the carbon fiber reinforced nylon composite material has a low water absorption rate, is less affected by water vapor in the air, is dimensionally stable, and can be used normally in humid areas. It is also much less affected by external temperature changes than metal materials. Therefore, the flute tail tube made of the present invention has good reliability, provides good support for other parts of the flute, and is more conducive to maintaining the stability of the timbre.

[0068] (ii) Weight

[0069] From the intuitive feeling of the performer when playing, the weight of the instrument itself has a relatively obvious difference; the carbon fiber reinforced nylon flute tail tube is smaller in density and lighter in weight than the traditional metal flute tail tube (see Table 1); through experiments, taking the same C-tail flute tail tube as an example, when the same keys are installed, the weight of the carbon fiber reinforced nylon flute tail tube after the tube body is installed is about 51g, while the weight of the traditional tail tube on the market after the tube body is installed is about 78.6kg; in comparison, the weight of the high-performance carbon fiber reinforced nylon prepared by the present invention is relatively light, and the player can better relieve the pressure on the wrist during long-term performance, improve comfort, and reduce fatigue and damage to muscles and joints.

[0070] Table 1 Comparison of density of available materials for flute

[0071]

[0072]

[0073] The carbon fiber reinforced nylon tail tube prepared in Example 1 of the present invention has multiple advantages:

[0074] Compared with the traditional metal tail pipe, it is lighter, which can reduce the risk of hand fatigue and hand diseases caused by long-term playing of the instrument;

[0075] Compared with metal materials, it has stable chemical properties and is not easily corroded by water vapor and sweat from the hands of the player when using the instrument.

[0076] The material is more stable, with a water absorption rate of 0.12-1.3%, which is lower than that of traditional nylon materials (such as nylon 66, nylon 6, etc., with a water absorption rate of 2.5%-5.8%). It is less affected by water vapor in the air, has stable dimensions, and can be used normally in humid areas.

[0077] The hardness is high and it is basically inelastic. The tensile strength of the product can reach about 101-105Mpa, which is better than the traditional carbon fiber reinforced nylon material. Although it is slightly lower than the metal hardness, the tail tube of the material can withstand the force used by the player during normal performance (1MPa (1 megapascal) = 1000000Pa (1 million Pascal); Pa is the unit of pressure, 1Pa = 1N / m 2 1Pa means 1N of force is uniformly pressed on 1m 2 The pressure generated on the area, the larger the value, the greater the pressure the substance can withstand);

[0078] Moreover, the carbon fiber reinforced nylon tail tube is much less affected by external temperature changes than metal materials. When using the instrument in a cold environment, the player's fingers are exposed to the air in a low-temperature environment and are prone to discomfort, which leads to reduced flexibility. The metal tail tube affected by temperature will further deepen the player's feeling of coldness. Therefore, using a high-performance carbon fiber reinforced nylon tail tube that is not easy to change temperature instead of a traditional metal tail tube can provide a more comfortable use experience for the player;

[0079] Compared with the tail tube made of metal material, the carbon fiber reinforced nylon tail tube has better environmental protection performance;

[0080] In addition, according to the needs of the performer, the carbon fiber reinforced nylon tail tube can be polished flat and sprayed with protective paint on the surface to achieve personalized customization in color and have a better visual effect of the performance.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A carbon fiber reinforced nylon flute tail tube, characterized in that: The material of the flute tail pipe is carbon fiber reinforced nylon composite material formed by nylon, carbon fiber and glass fiber.

2. The carbon fiber reinforced nylon flute tail tube according to claim 1, characterized in that: In the carbon fiber reinforced nylon composite material, the composition ratios of nylon, carbon fiber and glass fiber are 55-64 parts: 23-27 parts: 27-33 parts respectively by mass.

3. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 1 or 2, characterized in that: The following steps are involved: Step S1: preparing raw materials for making carbon fiber reinforced nylon composite materials, including nylon, carbon fiber and glass fiber, grinding the three raw materials into powder and uniformly mixing them to obtain raw material mixed powder; Step S2: loading the raw material mixed powder into the material bin of the 3D printer and preheating it; Step S3: After the preheating is completed, a 3D printer is used to shape the flute tail tube according to the preset flute tail tube structure shape using fused deposition 3D printing technology.

4. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 3, characterized in that: The method of forming the flute tail tube by using the fused deposition 3D printing technology includes three stages: melting, deposition and forming: After the raw material mixed powder is heated and melted by a melting device, the molten composite carbon fiber high-performance nylon material is extruded from the nozzle; Deposition and printing are performed layer by layer according to the printing path set by the computer modeling and slicing software according to the structural shape of the flute tail tube; After the molten composite carbon fiber high-performance nylon material is cooled and solidified, the final carbon fiber reinforced nylon flute tail tube is obtained.

5. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 4, characterized in that: In step S2, the preheating temperature range is 199-235°C, and the preheating time is 5-10 minutes; in step S3, the heating melting temperature range of fused deposition 3D printing is 250-280°C, the layer-by-layer deposition printing speed is 30-60 mm / s, and the thickness of each deposition layer is between 0.15 and 0.3 mm.

6. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 3, characterized in that: The nylon is PA12, and the specific preparation method is to use butadiene as the matrix, melt it through an injection molding process, the melting temperature is 240-300°C, and then dry it to shape it.

7. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 3, characterized in that: The raw materials for preparing the carbon fiber include acrylic fiber and viscose fiber, and the mass ratio of acrylic fiber to viscose fiber is 62-87:13-38. The preparation method is to mix the raw materials and then prepare the carbon fiber through the following three stages: First, pre-oxidation is carried out in air at 200-300°C for 28-65 minutes; Then, heat treatment is performed at a high temperature of 1600-1800°C to carbonize the steel for 2-8 minutes; Finally, heat treatment is continued at a high temperature of 2600-3000°C to form carbon fibers for 25-45 minutes. The raw material for preparing the viscose fiber is pulp, and the preparation method is: immersing the pulp in an alkaline aqueous solution to generate alkali cellulose, allowing the alkali cellulose to react with carbon disulfide to generate cellulose sulfonate viscose; extruding the viscose through a spinning machine spinneret and then entering a coagulation bath, allowing the viscose to solidify in the coagulation bath to form fibers.

8. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 7, characterized in that: The pulp is cotton pulp, wood pulp or a mixture thereof; the alkaline aqueous solution is a 16-20% sodium hydroxide aqueous solution; the coagulation bath is an aqueous solution prepared by mixing sulfuric acid and sodium sulfate in a volume ratio of 1-1.2:1-1.2; and the extrusion speed of the spinning machine spinneret is 120-140 m / min.

9. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 3, characterized in that: The preparation method of the glass fiber is as follows: inorganic ore is crushed and melted to 1500-2000°C to prepare a glass solution, and then the solution is drawn into glass fiber strands with a diameter of 3-80 μm after removing bubbles, and the drawing speed is 1000-3000 m / min.

10. The method for preparing the carbon fiber reinforced nylon flute tail tube according to claim 3, characterized in that: The tail tube of the flute is shaped using fused deposition modeling 3D printing technology, then polished and sprayed with protective paint on the surface.

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