CN211016472U - National musical instrument broad-spectrum artificial vibration membrane - Google Patents
National musical instrument broad-spectrum artificial vibration membrane Download PDFInfo
- Publication number
- CN211016472U CN211016472U CN201921534724.9U CN201921534724U CN211016472U CN 211016472 U CN211016472 U CN 211016472U CN 201921534724 U CN201921534724 U CN 201921534724U CN 211016472 U CN211016472 U CN 211016472U
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- Prior art keywords
- glass fiber
- musical instrument
- erhu
- laminated
- skin
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- 239000012528 membrane Substances 0.000 title claims abstract description 24
- 239000003365 glass fiber Substances 0.000 claims abstract description 28
- 239000004593 Epoxy Substances 0.000 claims abstract description 18
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000007639 printing Methods 0.000 claims abstract description 6
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 5
- 239000013078 crystal Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 claims 3
- 102000008186 Collagen Human genes 0.000 abstract description 4
- 108010035532 Collagen Proteins 0.000 abstract description 4
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- 239000002131 composite material Substances 0.000 abstract description 4
- 210000003205 muscle Anatomy 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 2
- 229920006335 epoxy glue Polymers 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 8
- 241000270295 Serpentes Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 241001482175 Pythonidae Species 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
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Abstract
The utility model discloses a national musical instrument broad-spectrum artificial vibration membrane, which is made of a plurality of raw materials into a laminated membrane by compounding, wherein the laminated membrane comprises thermosetting epoxy resin, alkali-free glass fiber cloth, a printing layer and a coating membrane respectively; the composite laminated film is used for simulating the tone of the python skin. The python skin structure is full of a muscle network and coagulated collagen. The utility model discloses in replace the muscle network in the python skin with glass fiber cloth, the collagen in the epoxy glue replacement python skin. Therefore, the artificial diaphragm of the utility model has very similar structure with the python skin, and the elasticity of the epoxy glass fiber laminated board is obviously superior to that of the python skin.
Description
Technical Field
The utility model relates to an use artificial diaphragm on national musical instrument replaces the python skin snake skin of traditional national musical instrument.
Background
For thousands of years, the boa skin or snake skin is adopted as a vibrating membrane in Chinese national musical instruments such as a huqin, a three-stringed instrument and the like. With the progress of human society and the improvement of civilization, pythons are classified as internationally protected animals, and python skin products are subject to strict limitations. If no special procedures exist, the boa skin musical instrument cannot go out of China, so that the living and development space of national musical instruments is greatly compressed, and the boa skin musical instrument is not popular all over the world like a western musical instrument.
The musical instruments made of python skin and snake skin have many defects, such as fear of dampness, fear of mildew and moth damage, short service life and no collection value. Because the performance of each python skin is greatly different due to different ages of the pythons and different positions on the pythons, the manufactured musical instruments have different personalities and different timbres. In large-scale ensemble, more than ten urheens are difficult to realize uniform tone, and the ensemble effect is influenced. In addition, the volume of the boa skin erhu is weak, dark and stuffy, and is in a weak state during ensemble.
SUMMERY OF THE UTILITY MODEL
The utility model is a broad-spectrum artificial vibration membrane developed for solving the problems.
The technical scheme adopted by the utility model is a national musical instrument broad-spectrum artificial vibration membrane, which is made of a plurality of raw materials into a laminated membrane by compounding, wherein the laminated membrane comprises a heat-fixing epoxy resin 1, an alkali-free glass fiber cloth 2, a printing layer 3 and a coating membrane 4; the alkali-free glass fiber cloth 2 is embedded in the thermosetting epoxy resin 1 to form an epoxy glass fiber laminated board, a printed layer 3 is bonded on the outer part of the epoxy glass fiber laminated board, and a dressing film 4 is bonded on the outer part of the printed layer 3; the laminated film is adhered to the sounding cavity of the national musical instrument;
the number of the coating films 4 is more than or equal to one.
The dressing film 4 is OPP, CPP or EVA plastic dressing film.
The national musical instrument is Mongolian Beijing opera fiddle, Beijing Erhu, Gaohu, Yuehu, Erhu with spring or crystal Erhu. The Beijing opera fiddle uses 0.1mm thick epoxy glass fiber laminate, the Beijing Erhu, Gaohu and Yuehu select 0.15mm thick epoxy glass fiber laminate, and the Shunquan Erhu and the Crystal Erhu select 0.2mm thick epoxy glass fiber laminate.
The composite laminated film is mainly used for simulating the tone of the python skin. The python skin structure is full of a muscle network and coagulated collagen. The utility model discloses in replace the muscle network in the python skin with glass fiber cloth, the collagen in the epoxy glue replacement python skin. Therefore, the artificial diaphragm of the present invention has very similar structure to the boa skin, but the performance of the artificial diaphragm is different from that of the boa skin, which is mainly reflected in the natural frequency of the artificial diaphragm and the boa skin.
The elasticity of the epoxy glass fiber laminated board is obviously better than that of the python skin in the direction vertical to the board surface, namely the normal direction. The laminated board is curled into a cylinder shape, the board can be immediately restored after the laminated board is released, and the boa skin is difficult to restore after being curled, so that the epoxy glass laminated board has good elasticity and vibration performance, and the artificial skin diaphragm made of the laminated board can certainly make the sound volume large, thereby improving the weak situation of weak biceps, dark sound and stuffy sound of the boa skin. One is to replace the fibres in the python skin with glass fibres in the material and the other is to apply a membrane to the laminate to increase the response to low frequencies. So as to achieve the sound production effect of the artificial material approaching the python skin material to the maximum extent and being used on the musical instrument.
Drawings
Fig. 1 is a schematic view of the structure of a broad-spectrum artificial diaphragm.
FIG. 1-thermosetting epoxy resin; 2-alkali-free glass fiber cloth; 3, printing a layer; 4, coating the membrane.
Fig. 2 is a statistical graph of the whole range sound intensity of the boa skin erhu.
Fig. 3 is a total range sound intensity statistical chart of the artificial Erhu.
Fig. 4 shows a graph of the frequency response of the boa skin erhu.
Fig. 5 is a graph of artificial urheen frequency response.
Detailed Description
A broad-spectrum artificial vibration membrane for national musical instruments is shown in figure 1, and is formed by laminating a heat-fixing epoxy resin 1, an alkali-free glass fiber cloth 2, a printing layer 3 and a coating membrane 4. The preparation method comprises the following steps:
(1) a commercially available standard epoxy glass cloth laminate of appropriate thickness is selected as required. The thickness of Mongolian Beijing opera fiddle is preferably 0.1mm, the thickness of Jing Erhu, Gaohu and Yue hu is preferably 0.15mm, and the thickness of Shuiquan Erhu and Crystal Erhu is preferably 0.2 mm.
(2) The python pattern or the snakeskin pattern is designed on the alkali-free glass fiber cloth, and other patterns can be adopted according to the requirements of users, and the patterns are printed on the laminated board by thermal transfer printing or silk screen printing.
(3) An OPP, CPP or EVA film is hot-compressed onto the printed layer of the laminate on a film applicator.
If the laminated board with proper thickness is not available, for example, the thickness of 0.18mm is needed for Erhu, and the thickness of 0.22mm is needed for Zhonghu and Sanhai, the slightly thick laminated board can be used for grinding to the needed thickness, and the epoxy glass fiber cloth non-standard laminated board with any thickness can be made at normal temperature, and the specific technical method is as follows:
(1) preparing a glue solution formula for epoxy resin hand-pasting molding at normal temperature:
the dosage of the epoxy resin E44 is 100, the curing agent is 6-8 parts of ethylenediamine, 10-14 parts of triethylene tetramine, 8-12 parts of diethylenetriamine, 10-15 parts of polyethylene polyamine, 20-22 parts of m-xylylenediamine, 40 parts of curing agent polyamide and 16-18 parts of plasticizer dibutyl ester, and the diluent can be dicarboxylic acid, dibutyl ester or acetone.
(2) The diluent or other auxiliary materials are added into the epoxy resin and evenly stirred for standby, and the curing agent is added and fully stirred before use.
(3) And flatly paving one or more layers of alkali-free glass fiber cloth in an injection mold.
(4) Injecting the mixed glue solution, and pressurizing.
(5) Note that: in the formula design, the gel time is controlled to be long, so that the glue solution in the blank is easy to run off; on the contrary, the glass fiber cannot be impregnated sufficiently, resulting in poor interlayer adhesion.
Fig. 2 to fig. 5 are actually measured records of important acoustic indexes of the acoustic instrument for the boa erhu and the artificial boa erhu, respectively. The actual measurement result shows that the performance index of the artificial vibration membrane reaches various indexes of the python skin, and the performance of the artificial vibration membrane can completely surpass the python skin as the improvement and development work is deeply improved.
Description of the embodiments and technical principles
In order to adapt to the traditional habits and psychological effects of people, the boa skin or snake skin patterns and other patterns can be printed on the plate surface of the artificial vibration membrane.
For the crystal musical instrument, in order to be crystal clear, printing and coating can be omitted, and only a white transparent epoxy glass cloth laminated board is used. The Beijing women crystal Lefang uses the crystal Erhu manufactured by us, and is active on domestic and foreign stages for many years.
For high-pitched music instruments such as Beijing opera fiddle, Gaohu fiddle and the like, the high-pitched music instrument is required to be crisp and beautiful, and a film is not required to be coated.
Natural frequency f of any diaphragm0Can be expressed by formula (1).
In the formula: m is0Is the mass of the diaphragm, c0Is compliance of the diaphragm
Compliance of the diaphragm c0Is a physical quantity that expresses softness; c. C0The larger the value, the more compliant the diaphragm is, the lower the vibration frequency, and the better the low-frequency vibration effect.
The thermosetting epoxy resin film plate has high hardness, no boa skin is soft and smooth, and c0Small value, vibration frequency f0High, low frequency vibration performance is poor.
The utility model discloses an improve the low side frequency characteristic of lamination diaphragm plate, apply ointment or plaster one deck or multilayer high strength plastic film on the basis of epoxy glass fiber membrane board to improve the compliance of composite vibration membrane. Thereby the tone of the artificial diaphragm is closer to that of the python skin.
The dressing film not only improves the smoothness of the composite laminated vibrating membrane, but also has the protection effect on a printed layer due to no toxicity, transparency and high strength.
The tensile property of the epoxy glass fiber cloth laminated film is far superior to that of the python skin snake skin, and under the action of strong force, even if the laminated film is broken, the size of the laminated film cannot be changed in the stress direction, so that the laminated film can not become loose and collapse after being used for making musical instruments like the python skin for several years, and the service life of the musical instruments is prolonged.
Meanwhile, the laminated sheet can be made into a laminated sheet with any thickness at normal temperature without heating, and the low-frequency characteristic of the laminated sheet is improved by adding the plasticizer.
Claims (4)
1. The utility model provides a national musical instrument broad spectrum artificial vibration membrane, this artificial vibration membrane adopts multiple raw and other materials complex to make laminated film, its characterized in that: the laminated films respectively comprise a heat-fixing epoxy resin (1), alkali-free glass fiber cloth (2), a printing layer (3) and a coating film (4); the alkali-free glass fiber cloth (2) is embedded in the thermosetting epoxy resin (1) to form an epoxy glass fiber laminated board, a printed layer (3) is bonded to the outer part of the epoxy glass fiber laminated board, and a dressing film (4) is bonded to the outer part of the printed layer (3); the laminated film is adhered to the sounding cavity of the national musical instrument.
2. The wide-spectrum artificial diaphragm of an ethnic musical instrument according to claim 1, wherein: the number of the coating films (4) is more than or equal to one.
3. The wide-spectrum artificial diaphragm of an ethnic musical instrument according to claim 1, wherein: the dressing film (4) is an OPP, CPP or EVA plastic dressing film.
4. The wide-spectrum artificial diaphragm of an ethnic musical instrument according to claim 1, wherein: the national musical instrument is Mongolian Beijing opera fiddle, Beijing Erhu, Gaohu, Yuehu, Erhu with spring or crystal Erhu; the Beijing opera fiddle uses 0.1mm thick epoxy glass fiber laminate, the Beijing Erhu, Gaohu and Yuehu select 0.15mm thick epoxy glass fiber laminate, and the Shunquan Erhu and the Crystal Erhu select 0.2mm thick epoxy glass fiber laminate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921534724.9U CN211016472U (en) | 2019-09-16 | 2019-09-16 | National musical instrument broad-spectrum artificial vibration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921534724.9U CN211016472U (en) | 2019-09-16 | 2019-09-16 | National musical instrument broad-spectrum artificial vibration membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211016472U true CN211016472U (en) | 2020-07-14 |
Family
ID=71473184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921534724.9U Expired - Fee Related CN211016472U (en) | 2019-09-16 | 2019-09-16 | National musical instrument broad-spectrum artificial vibration membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211016472U (en) |
-
2019
- 2019-09-16 CN CN201921534724.9U patent/CN211016472U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200714 |