G.R.P low-carbon wood-replacing sound-channel-selecting sound-quality-determining sound gong and drum

Abstract

The invention relates to a G.R.P low-carbon wood-replacing channel-selecting sound-quality-determining sound gong and drum, which is provided with a drum body and comprises a suite product, the drum body and a drum head are connected by adopting a plurality of rivets, the rivets are respectively attached and fastened on the opening thigh walls of the two tail ends of the drum body, and the drum body and the drum head are manufactured into a whole, and the drum body is of a structure made of a glass fiber reinforced plastic material. Under certain technical requirements and process conditions, under the condition of customizing the structures and wall thicknesses of different drum body components, the sound of the gong and drum sound under the quality of a series of products with different specifications of drum surface diameters is respectively determined, so that the acoustic effect of the sound with the optimal tone quality required by a music player and different scenes is obtained, and the whole gong and drum with the pure G.R.P structure is manufactured. Manufacturing and using of the new-quality productivity can generate positive effects, large-scale finished trees can be saved, forest felling is reduced, forest resources are protected, natural ecology is preferentially protected, carbon dioxide emission can be reduced by hundreds of tons every year, and a new scheme is provided for accelerating formation of an industrial system of the new-quality productivity.

Description

Technical Field

[0001] The present invention relates to a G·R·P low-carbon wood substitute, channel-selectable fixed sound quality, and sound gong and drum. The present invention is a music and sound instrument device, which is suitable for hitting the drum with a drumstick, and the drum sound can be heard. When the drum surface is touched by hand, the drum surface can be felt to vibrate rapidly. If the drum surface is pressed by the palm to stop the vibration, the drum sound will disappear immediately. When the gong and drum are hit, the vibration of the drum surface produces a beautiful and pleasant gong and drum sound.

[0002] Mass law of single-layer dense homogeneous components: the greater the mass per unit area, the better the sound insulation effect. Lightweight components have a small density per unit area and are easily excited to cause vibration, so their sound insulation ability is poor. This principle is called the "mass law".

[0003] Generation of sound: The vibration of objects is the source of sound; the propagation of object vibration in the air is called fluctuation; sound is also called sound wave; the propagation of sound waves has the following characteristics: 1. The radiation and attenuation of sound; 2. The reflection, refraction and diffraction of sound waves; 3. The superposition and interference of sound waves.

[0004] The speed at which sound waves propagate in a certain medium is called the speed of sound (denoted by C, in meters per second); at room temperature (20°C) and standard atmospheric pressure (the mass of air is about 1.2 kg / m 3 ), the speed of sound in air is 344 m / s; but the speed of sound is not fixed, when the temperature changes, the speed of sound also changes, at 0℃, the speed of sound C = 331.5 m / s, for every increase of 1℃, the speed of sound increases by 0.607 m / s; in different media, the speed of sound is also different; for example, in glass it is about 5000-6000 m / s; in steel it is about 5000 m / s; in oak it is about 4000 m / s; in pine it is about 3500 m / s; in water the speed of sound is approximately 1450 m / s; in In glass fiber reinforced plastic, it is about 800 to 2000 m / s; in cork, it is about 500 m / s; and in rubber, it is about 40 to 150 m / s; at room temperature, in air, when the frequency f = 20 Hz, the wavelength λ = 17.2 m, and when the frequency f = 20000 Hz, the wavelength λ = 17.2 cm; therefore, at room temperature, the wavelength of audible sound waves in the air is between 17.2 cm and 17.2 m; that is: the higher the frequency of the sound, the shorter the wavelength (called high-frequency sound), and the lower the frequency, the longer the wavelength (called low-frequency sound).

[0005] Glass fiber reinforced plastic (Glass fiber Reinforced Plastic) - English abbreviation and abbreviation: G·R·P.

[0006] Glass fiber reinforced plastics have excellent properties such as light weight and high strength, corrosion resistance, good electrical insulation, good thermal performance, excellent fatigue performance, sound insulation, damping, and shock absorption; the molding of glass fiber reinforced plastics is relatively convenient and flexible, which is incomparable to many conventional materials; in terms of design, since the materials and products of glass fiber reinforced plastics are formed simultaneously in the same process flow, it has a huge degree of design freedom; glass fiber reinforced plastics have not only been widely used in electrical and electronic technologies due to their excellent electrical insulation properties, but also have excellent properties such as being immune to electromagnetic effects, not reflecting radio waves, and having good microwave transmittance, so glass fiber reinforced plastics are currently widely used in communication engineering; glass fiber reinforced plastics can also be designed according to the product's load, structural form, geometric shape, size and other use requirements, and the raw materials and molding methods can be reasonably selected; glass fiber reinforced plastics are suitable for overall molding and for products with complex shapes, low output, and difficult to shape, the effect is particularly significant; the molding process is simple and saves labor time; in addition, glass fiber reinforced plastics also have the advantages of sound insulation, transparency, and easy coloring.

[0007] Frequency - Frequency is a physical quantity that indicates the speed of vibration of the sound source; the frequency of audible sound is within the range of 20 to 20,000 Hz; in the science of acoustics, noise (sound) below 500 Hz is usually called low frequency, 500 to 2,000 Hz is called medium frequency, and above 2,000 Hz is called high frequency.

[0008] Frequency range - In acoustics, for the sake of convenience, people divide the wide audio frequency range into several small frequency bands, which are called frequency bands or frequency ranges; the frequency range is divided into octaves and 1 / 3 octaves. The octave range is commonly used in engineering, and its center frequencies are 31.5, 63, 125, 250, 500, 1000, 2000, 40000, 80000, 16000 [Hz].

[0009] Spectrum - In acoustics, the frequency distribution of sound strength is given with frequency (frequency range) as the horizontal axis and the strength of sound as the vertical axis. From the spectrum, the various frequency components or corresponding intensities of the noise (sound) can be analyzed, which is the so-called spectrum analysis. Background Art

[0010] For example, Chinese patent publication number: CN202307103U discloses "A portable timpani", which has the following problems and disadvantages: only the drum body and supporting legs are replaced with fiberglass materials in order to reduce the weight of the drum and facilitate carrying.

[0011] For another example, Common Knowledge 1 discloses that the book "Orchestral Instruments Method" compiled by Cui Yongri and published by Harbin Map Publishing House in September 2004 discloses the following content on page 179: "Timpani, also known as national timpani, is simply modified on the basis of the cylinder drum by absorbing the fixed pitch characteristics of Western timpani; the drum frame is made of wood (some are made of fiberglass)" and other existing problems and shortcomings.

[0012] For example, Common Knowledge 2 discloses that Wang Man wrote in his article “Similarities and Differences between National Drums and Western Drums in Playing Methods” published in the 1st issue of Tianjin Conservatory of Music Journal (January 31, 1998) in 1998 that “National drums such as hall drum, row drum and class drum have problems and shortcomings only in that their cavities are basically made of wood or fiberglass. Summary of the invention

[0013] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a G·R·P low-carbon substitute for wood, a channel-selected fixed sound quality, and a sound gong and drum. To solve the above technical problems, the technical solution (i) adopted is, comprising: a drum body, the material of the drum body adopts the structural form of G·R·P, in order to optimize the drum body structure reorganization and respectively select the best: select the sound speed, adjust the audio frequency and determine the sound quality, etc., in the quality of the G·R·P low-carbon substitute for wood, the channel-selected fixed sound quality, and the sound gong and drum, respectively, in determining each technical characteristic parameter of [channel-selected fixed sound quality] in a series of products of various specifications, in order to better improve the G·R·P low-carbon substitute for wood, the channel-selected fixed sound quality, the sound gong and drum product quality, such as loud sound, pure sound quality, etc., it can be done and achieved: when the gongs and drums are struck, the vibration of the drum surface respectively produces a variety of sound channel [audio frequency band] timbre and sound quality - that is, under specific technical requirements and process conditions, and customized different drum body structures and wall thicknesses, the various determined The invention relates to a G·R·P drum body complete set product 2 which can obtain the best and beautiful effects required by musicians and different scenes by making the sounds of gongs and drums under the quality of a series of products with different drum head diameters; the materials of the G·R·P drum body complete set product specifically include: one is a complete set product 2 which is an unsaturated polyester G·R·P drum body structure and its manufacturing and constitutes an integral whole, and the other is another complete set product 2 which is an epoxy polyester G·R·P drum body structure and its manufacturing and constitutes an integral whole; and the technical scheme adopted above is for: under certain technical requirements and process conditions, and by customizing the structure and wall thickness of different G·R·P drum body components, the sounds of gongs and drums under the quality of a series of products with different drum head diameters are respectively determined to obtain the acoustic effects of the best sound quality required by musicians and different scenes and to manufacture them into a whole: a first complete set product of G·R·P low-carbon wood substitute, channel-selected fixed sound quality, and loud gongs and drums.

[0014] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a G·R·P low-carbon substitute for wood, a channel-selected fixed sound quality, and a sound gong and drum. To solve the above technical problems, the technical solution (ii) adopted is, comprising: a drum body, the material of the drum body adopts the structural form of G·R·P, in order to optimize the drum body structure reorganization and respectively select the best: select the sound speed, adjust the audio frequency and determine the sound quality, etc., in the quality of the G·R·P low-carbon substitute for wood, the channel-selected fixed sound quality, and the sound gong and drum, respectively, in determining each technical characteristic parameter of the [channel-selected fixed sound quality] in the series of products of various specifications, in order to better improve the G·R·P low-carbon substitute for wood, the channel-selected fixed sound quality, the sound gong and drum product quality, such as loud sound, pure sound quality, etc., it can be done and achieved: when the gongs and drums are struck, the vibration of the drum surface respectively produces a variety of sound channel [audio frequency band] timbre and sound quality - that is, under specific technical requirements and process conditions, and customized different drum body structures and wall thicknesses, the various determined The invention relates to a G·R·P drum body complete set product 5 which can obtain the best and most pleasant sound effects required by musicians and different scenes by making the sounds of gongs and drums under the quality of a series of products with different drum head diameters; the materials of the G·R·P drum body complete set product specifically include: one is a complete set product 5 which is an unsaturated polyester G·R·P drum body structure and its manufacturing as a whole, and the other is another complete set product 5 which is an epoxy polyester G·R·P drum body structure and its manufacturing as a whole; and the technical scheme adopted above is for the purpose of: under certain technical requirements and process conditions, customizing the structure and wall thickness of different G·R·P drum body components, and respectively determining the sounds of gongs and drums under the quality of a series of products with different drum head diameters, so as to obtain the acoustic effects of the best sound quality required by musicians and different scenes and manufacture them as a whole: a second complete set product of G·R·P low-carbon wood substitute, channel-selected fixed sound quality, and sound gongs and drums.

[0015] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a G·R·P low-carbon substitute for wood, a channel-selected fixed sound quality, and a sound gong and drum. In order to solve the above technical problems, the technical solution (iii) adopted is, comprising: a drum body, the material of the drum body adopts the structural form of G·R·P, in order to optimize the drum body structure reorganization and respectively select the best: select the sound speed, adjust the audio frequency and determine the sound quality, etc., in the quality of the G·R·P low-carbon substitute for wood, the channel-selected fixed sound quality, and the sound gong and drum, respectively, in determining each technical characteristic parameter of the [channel-selected fixed sound quality] in the series of products of various specifications, in order to better improve the G·R·P low-carbon substitute for wood, the channel-selected fixed sound quality, the sound gong and drum product quality The sound is loud, the sound quality is pure and other excellent characteristics, it can be done and achieved: when the gongs and drums are struck, the vibration of the drum surface produces a variety of sound channels [audio frequency bands] timbre and sound quality respectively - that is, under specific technical requirements and process conditions, customized different drum body structures and wall thicknesses, the various specifications are determined The sound of gongs and drums under the quality of the series of products of the standard drum head diameter can achieve the best beautiful and pleasant G·R·P drum shell complete set product 10 required by musicians and different scenes; the materials of the G·R·P drum shell complete set product specifically include: one is a complete set product 10 that is an unsaturated polyester G·R·P drum shell structure and its manufacturing to form a whole, and the other is another complete set product 10 that is an epoxy polyester G·R·P drum shell structure and its manufacturing to form a whole; and the above-mentioned technical scheme is to: under certain technical requirements and process conditions, customize the structure and wall thickness of different G·R·P drum shell components, and respectively determine the sound of gongs and drums under the quality of each series of products of the standard drum head diameter, to obtain the acoustic effect of the best sound quality required by musicians and different scenes and manufacture it as a whole: a third complete set of G·R·P low-carbon wood substitute, channel-selected sound quality, and sound gongs and drums.

[0016] A further technical solution for achieving the purpose of the technical solutions 1, 2 and 3 of the present invention is: to provide a G·R·P low-carbon wood substitute, channel-selectable, sound-determined gong and drum, comprising: the materials of the drum body 2, or 5, or 10 are respectively selected from: the structure of unsaturated polyester glass fiber reinforced plastic, or the structure of epoxy polyester glass fiber reinforced plastic, and the molding process methods provided therein are respectively: ①. The wet contact hand paste molding process is respectively selected, and the hand paste molding process is to apply a layer of unsaturated polyester / epoxy polyester resin adhesive mixed according to the formula on a mold pre-coated with a release agent, and lay a layer of alkali-free untwisted coarse roving gingham cloth to discharge bubbles, and repeat this N times until the wall thickness of the above-mentioned drum body is required at room temperature Solidification → demoulding → mechanical processing (finishing) → qualified drum body finished product 2, or 5 and or 10; ②. Select to adopt semi-dry winding molding process respectively, the winding molding process is to impregnate the continuous glass fiber untwisted yarn into: the resin glue of unsaturated polyester / epoxy polyester mixed according to the formula, pre-bake and then wind it onto the core mold to form - unsaturated polyester glass fiber reinforced plastic / epoxy polyester glass fiber reinforced plastic product method (the winding process can be carried out at room temperature), the core mold rotates around its own axis at a uniform speed, the guide wire head reciprocates along the axis direction of the core mold at a specific speed, and its winding angle is about 12 to 70°, and so on until the wall thickness required for the above-mentioned drum body is achieved, solidification → demoulding → mechanical processing (finishing) → qualified drum body finished product 2, or 5, or 10.

[0017] A further technical solution for achieving the purpose of the above-mentioned technical solutions 1, 2 and 3 of the present invention is: to provide a G·R·P low-carbon wood substitute, channel-selectable fixed sound quality, and sound gong and drum, including: the materials of the drum body 2, or 5, or 10 are respectively selected from: the structure of unsaturated polyester glass fiber reinforced plastic, or the structure of epoxy polyester glass fiber reinforced plastic. In order to improve the weather resistance, water resistance, chemical properties and extend the service life of the above-mentioned glass fiber reinforced plastic drum body products, as well as the smooth, beautiful and generous appearance, a colored anti-aging resin gel coat layer is made on the surface of the glass fiber reinforced plastic drum body 2, or 5, or 10 product, and the thickness of the colored gel coat layer is a structural form between 0.25 and 0.45 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 Bottom view of the kit 1 according to an embodiment of the present invention.

[0020] Figure 2 A front view of the kit 1 according to an embodiment of the present invention.

[0021] Figure 3 A top view of a kit 1 according to an embodiment of the present invention.

[0022] Figure 4 A left side view of the kit 1 according to an embodiment of the present invention.

[0023] Figure 5 A right side view of the kit 1 according to an embodiment of the present invention.

[0024] Figure 6 Kit 1 of the embodiment of the present invention Figure 2 AA cross-section diagram.

[0025] Figure 7 Bottom view of the kit 2 according to an embodiment of the present invention.

[0026] Figure 8 A front view of a kit 2 according to an embodiment of the present invention.

[0027] Fig. 9 A top view of a kit 2 according to an embodiment of the present invention.

[0028] Fig.10 A left side view of a kit 2 according to an embodiment of the present invention.

[0029] Fig.11 A right side view of a kit 2 according to an embodiment of the present invention.

[0030] Fig.12 Kit 2 of the embodiment of the present invention Figure 8 BB cross-section diagram.

[0031] Fig.13 A front view of the kit 3 according to an embodiment of the present invention.

[0032] Fig.14 Bottom view of the kit 3 according to the embodiment of the present invention.

[0033] Fig.15 A top view of a kit 3 according to an embodiment of the present invention.

[0034] Fig.16 A left side view of the kit 3 according to an embodiment of the present invention.

[0035] Fig.17 A right side view of the kit 3 according to an embodiment of the present invention.

[0036] Fig.18 Kit 3 of the embodiment of the present invention Fig.13 CC cross-section diagram.

[0037] Figure 2 Middle: 1. Drum skin, 2. Drum body, 3. Metal rivets.

[0038] Figure 5 Middle: 1. Drum head, 3. Metal rivets.

[0039] Figure 6Middle: 2. Drum body.

[0040] Figure 7 Middle: 5. Drum body, 6. Lower drum head, 7. Metal rivets.

[0041] Figure 8 Middle: 4. Upper drum head, 5. Drum body, 6. Lower drum head, 7. Metal rivets.

[0042] Fig. 9 Middle: 4. Upper drum head, 5. Drum body, 7. Metal rivets.

[0043] Fig.12 Middle: 5. Drum body.

[0044] Fig.13 Middle: 8. Drum skin, 9. Metal sheet reinforced elbow skin, 10. Drum body, 11. Metal rivets.

[0045] Fig.15 Middle: 8. Drum skin, 9. Metal sheet reinforced elbow skin, 10. Drum body, 11. Metal rivets.

[0046] Fig.18 Middle: 10. Drum body. DETAILED DESCRIPTION

[0047] like Figure 2 , Figure 5 , Figure 6 As shown, a G·R·P low-carbon wood substitute, channel-selectable fixed-tone, sound-making gong and drum of this embodiment comprises: a drum body 2, wherein the connection between the drum body 2 and the drum skin 1 is achieved by a plurality of metal rivets 3, which are respectively attached and fastened to the two end edges of the drum body 2, and are manufactured together with the drum body 2 to form a first complete set of products as a whole; the first complete set of products has an appearance and geometric shape as shown in the attached figure. Figure 2 The arrangement shown is a waist drum-shaped regular ellipsoidal sphere.

[0048] like Figure 2 , Figure 5 As shown, a G·R·P low-carbon wood substitute, channel-selected fixed-tone, sound-making gong and drum of this embodiment has a drum skin 1 material, which is selected from high-quality domestic and foreign brand drum skins: real sheepskin; or real cowhide; or real horsehide products.

[0049] like Figure 2 , Figure 6 As shown, a G·R·P low-carbon wood substitute, channel-selectable fixed-tone, sound-making gong and drum in this embodiment, the material of the drum body 2 is respectively: unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic structure.

[0050] like Figure 7 , Figure 8 , Fig. 9 , Fig.12 As shown, a G·R·P low-carbon wood substitute, channel-selectable fixed-tone, sound-making gong and drum of this embodiment comprises: a drum body 5, wherein the connection between the drum body 5 and the upper drum skin 4 and the lower drum skin 6 is achieved by a plurality of metal rivets 7, which are respectively attached and fastened to the two end edges of the drum body 5, and are manufactured together with the drum body 5 to form a second set of products as a whole; the appearance geometric shape of the second set of products is as follows Figure 8 The setting shown is the shape of the waist and drum of a medium-sized right circular cone table.

[0051] like Figure 7 , Figure 8 , Fig. 9 , Fig.12 As shown, a G·R·P low-carbon wood substitute, channel-selectable, sound-determined gong and drum of this embodiment has a drum body 5 made of unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic.

[0052] like Figure 7 , Figure 8 , Fig. 9 As shown, the G·R·P low-carbon wood substitute, channel-selected fixed-tone, sound-making gong and drum of this embodiment, the upper drum skin 4 and the lower drum skin 6 are provided with materials, and the drum skins of domestic and foreign high-quality brands are respectively selected to be: real sheepskin; or real cowhide; or real horsehide products.

[0053] like Figure 7 , Figure 8 , Fig. 9 , Fig.12 As shown, the support bracket of a G·R·P low-carbon wood substitute, channel-selectable fixed-tone, and sound-making gong and drum of the present embodiment is selected and customized according to the diameter size of the right cone ball table of the upper drum skin 4 and the lower drum skin 6 and the requirements of different occasions when they are exchanged and used, so as to meet the needs of different performers and scenes, etc., and can be used comfortably and conveniently, and has a stable and reliable structure of the gong and drum support bracket.

[0054] like Fig.13 , Fig.15 , Fig.18 As shown, a G·R·P low-carbon wood substitute, channel-selectable fixed-tone, sound-making gong and drum of this embodiment comprises: a drum body 10, wherein the connection between the drum body 10 and the drum skin 8 and the metal sheet reinforced elbow skin 9 is made of a plurality of metal rivets 11, which are respectively attached and fastened to the two end edges of the drum body 10, and are manufactured together with the drum body 10 to form a third set of products as a whole; the appearance geometric shape of the third set of products is as follows Fig.13 The arrangement shown is: a large spherical table drum shape.

[0055] like Fig.13 , Fig.15 As shown, the G·R·P low-carbon wood substitute, channel-selected fixed sound quality, and sound gong and drum of this embodiment have a drum skin 8 material, which is selected from high-quality domestic and foreign brand drum skins: real sheepskin; or real cowhide; or real horsehide products.

[0056] exist Fig.13 , Fig.15 As shown, a G·R·P low-carbon wood substitute, channel selection and sound quality, sound gong and drum of this embodiment, the material of the metal sheet reinforced elbow skin 9 is respectively composed of: a stainless steel sheet or a brass sheet.

[0057] like Fig.13 , Fig.15 , Fig.18 As shown, a G·R·P low-carbon wood substitute, channel-selectable, sound-determined gong and drum of this embodiment has a drum body 10 made of: unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic structure.

[0058] like Fig.13 , Fig.15 As shown, the support bracket of a G·R·P low-carbon wood substitute, channel-selectable fixed sound quality, and sound gong and drum in this embodiment is selected and customized according to the diameter size of the drumhead 8 and the requirements of different occasions when it is exchanged and used, and is suitable for different performers and scenes, etc. It can be used comfortably and easily, and has a stable and reliable structure of the gong and drum support bracket.

[0059] like Figure 2 , Figure 5 , Figure 6 and Figure 7 , Figure 8 , Fig. 9 , Fig.12 as well as Fig.13 , Fig.15 , Fig.18As shown, the present embodiment is a G·R·P low-carbon wood substitute, channel selection and sound quality, sound gong and drum, the materials of the drum bodies 2, 5 and 10 are respectively: unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic structure, and the drum skin 1 and the upper drum skin 4 and the lower drum skin 6 and the drum skin 8 are respectively selected under the same premise that domestic and foreign high-quality brand drum skins are respectively selected. Further, the materials of the drum bodies 2, 5 and 10 are respectively selected: unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic structure. The purpose is to optimize the drum body 2, or 5, or 10 structural reorganization respectively select: select the sound speed, adjust the audio frequency and determine the sound quality, etc. G·R·P low-carbon wood substitute, channel selection and sound quality, sound gong and drum quality, respectively in determining the series of various specifications. Each technical characteristic parameter in the product (select channel to determine sound quality) is measured to better improve the quality of the G·R·P low-carbon wood substitute, select channel to determine sound quality, and sound gongs and drums, such as loud sound, pure sound quality, wide frequency, noise isolation, damping and shock absorption, good anti-electromagnetic and radio wave performance, low carbon and energy saving, clean and environmentally friendly, moisture-proof and fire-proof, high strength, good fatigue resistance, easy coloring, strong designability, convenient and flexible molding, not easy to be damaged after long-term use, and low manufacturing cost. It can achieve and achieve the following advantages: when beating gongs and drums, the vibration of the drumhead produces a variety of sound channels (audio frequency bands) timbres and sound qualities {that is: under specific technical requirements and conditions, different drum body 2, or 5, or 10 structures and wall thicknesses, and the quality of various specifications of drumhead diameter series products is determined} The sound of gongs and drums can achieve the best effect of beautiful and pleasant sounds required by musicians and different scenes.

[0060] like Figure 2 , Figure 5 , Figure 6 and Figure 7 , Figure 8 , Fig. 9 , Fig.12 as well as Fig.13 , Fig.15 , Fig.18 As shown, a G·R·P low-carbon substitute for wood, channel selection to determine the sound quality, and sound gongs and drums of this embodiment, and further, the drum body 2, drum body 5 and drum body 10 respectively choose to use: glass fiber reinforced plastic structural material to replace high-quality large-scale mature wood raw materials - to manufacture: G·R·P low-carbon substitute for wood, channel selection to determine the sound quality, sound gongs and drums quality products, is to save a large number of large-scale mature wood, reduce deforestation, and, can protect the forest resources and ecological environment of the global village, promote the formation and implementation of green, environmentally friendly, low-carbon life and production and sustainable growth development mode, as well as give priority to the protection of natural ecology, play a positive and direct role in the purpose, benefit the present and future generations, ..., and so on.

[0061] like Figure 2 , Figure 5 , Figure 6 and Figure 7 , Figure 8 , Fig. 9 , Fig.12 as well as Fig.13 , Fig.15 , Fig.18 As shown, a G·R·P low-carbon substitute for wood, channel selection and fixed sound quality, and sound gongs and drums of this embodiment, the materials of the drum bodies 2, 5 and 10 are respectively selected: unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic structure, and the molding process methods provided are respectively: ①. Wet contact hand paste molding process is selected respectively. The hand paste molding process is to apply a layer of unsaturated polyester / or epoxy polyester resin sizing agent mixed according to the formula on a mold pre-coated with a release agent, and lay a layer of alkali-free untwisted coarse roving gingham cloth to discharge bubbles, and repeat this N times until the wall thickness of the above-mentioned drum body 2, or 5, or 10 is required, room temperature curing → demoulding → machining (finishing) → qualified drum body 2, or 5, or 10 finished products; ②. Select to adopt semi-dry winding molding process respectively, the winding molding process is to impregnate the continuous glass fiber untwisted yarn into: the resin glue of unsaturated polyester / or epoxy polyester mixed according to the formula, pre-bake and then wind it onto the core mold to form - unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic products (the winding process can be carried out at room temperature), the core mold rotates around its own axis at a uniform speed, the guide wire head reciprocates along the axis direction of the core mold at a specific speed, and its winding angle is about 12 to 70°, and so on until the wall thickness of the above-mentioned drum body 2, or 5, or 10 is required, solidification → demoulding → machining (trimming) → qualified drum body 2, or 5, or 10 finished products.

[0062] like Figure 2 , Figure 5 , Figure 6 and Figure 7 , Figure 8 , Fig. 9 , Fig.12 as well as Fig.13 , Fig.15 , Fig.18As shown, a G·R·P low-carbon wood substitute, channel-selectable sound quality, and sound gong and drum of this embodiment, the materials of the drum bodies 2, 5 and 10 are respectively selected from: unsaturated polyester glass fiber reinforced plastic / or epoxy polyester glass fiber reinforced plastic structure. In order to improve the weather resistance, water resistance, chemical properties and extend the service life of the above-mentioned glass fiber reinforced plastic drum body 2, or 5, or 10 products, as well as the smooth, beautiful and generous appearance, a colored anti-aging resin gel coat layer is made on the surface of the glass fiber reinforced plastic drum body 2, or 5, or 10 products, and the thickness of the colored gel coat layer is between 0.25 and 0.45 mm. For example, the color of the outer gel coat layer of the above-mentioned glass fiber reinforced plastic drum body 2, or 5, or 10 products can be festive red appearance color, etc., that is, any color and pattern (such as: auspicious cloud lace pattern), etc.

Claims

1. A G·R·P low-carbon wood substitute, channel-selectable fixed-tone quality, sound-making gong and drum, having a drum body, characterized in that: Under certain technical requirements and process conditions, the structure and wall thickness of different G·R·P drum body components are customized, and the sound of gongs and drums under the quality of each series of drumhead diameter products is determined respectively to obtain the acoustic effects of the best sound quality required by musicians and different scenes. The purpose of this product is to manufacture a set of G·R·P low-carbon wood substitutes, channel-selected sound quality, and sound gongs and drums. The "manufacturing and use" of the new quality productivity of this set of products can produce positive effects, reduce a large amount of carbon dioxide emissions, and effectively alleviate the pressure of high-consumption production capacity reduction and decarbonization in related industries, providing new solutions for accelerating the formation of new quality productivity and building a modern industrial system.

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