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CN116489566A - Composite material cone for strong sound rejection driving-off device and preparation method thereof - Google Patents

Composite material cone for strong sound rejection driving-off device and preparation method thereof Download PDF

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Publication number
CN116489566A
CN116489566A CN202310478180.3A CN202310478180A CN116489566A CN 116489566 A CN116489566 A CN 116489566A CN 202310478180 A CN202310478180 A CN 202310478180A CN 116489566 A CN116489566 A CN 116489566A
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CN
China
Prior art keywords
cone
strong
composite material
epoxy resin
sound
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Pending
Application number
CN202310478180.3A
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Chinese (zh)
Inventor
王志远
陈刚
魏化震
王启芬
于倩倩
王�忠
赵伟松
崇琳
秦贞明
陈青香
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Shandong Non Metallic Material Research Institute
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Shandong Non Metallic Material Research Institute
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Publication date
Application filed by Shandong Non Metallic Material Research Institute filed Critical Shandong Non Metallic Material Research Institute
Priority to CN202310478180.3A priority Critical patent/CN116489566A/en
Publication of CN116489566A publication Critical patent/CN116489566A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/001—Moulding aspects of diaphragm or surround

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The invention discloses a composite material cone of a strong-sound strong-light drive-off system and a preparation method thereof, and belongs to the technical field of strong-sound drive-off prevention equipment. The basin body of the composite material basin of the strong sound and strong light separation system is of an integrated multielement conical structure, is manufactured by adopting a high-strength, high-modulus and high-toughness fiber fabric and a high-toughness and high-damping epoxy resin system, and has the advantages of high overall structural strength, high rigidity, good damping performance, strong stability, outstanding sound intensity, excellent sound directivity, high speaking definition and the like. The preparation method of the composite material cone of the strong-sound strong-light separation system comprises the steps of designing and preparing a mould comprising a multi-element conical cavity with an integrated structure, manufacturing the composite material cone by utilizing a vacuum adsorption and infusion molding process, impregnating prepared epoxy resin into a preformed body, and finally integrally molding the composite material cone of the strong-sound strong-light separation system.

Description

Composite material cone for strong sound rejection driving-off device and preparation method thereof
Technical Field
The invention belongs to the technical field of strong-sound rejection driving-off equipment, and particularly relates to a composite material cone for a strong-sound rejection driving-off device and a preparation method thereof.
Background
The strong sound rejection driving-away device is a strong sound wave cluster with high directivity by emitting. The cone is an important sound transmission component on the system, and the voice coil fixed on the cone generates strong vibration in a magnetic field after being connected with an audio signal, and drives the cone to vibrate at the same time, so that the cone vibrates to force air to vibrate, and then sound is generated. The material and manufacturing process of the cone have great influence on the electroacoustic performances such as the resonance frequency, the effective frequency, the sound intensity, the sensitivity, the distortion degree and the like of the strong sound rejection driving-off system and the system stability, and further have great influence on the rejection driving-off effect.
At present, the materials of the sound basin for the strong sound rejection driving-off device are few, and the materials are reported to be polypropylene materials, so that the cost of the materials is lower, but the sound basin prepared by adopting the materials and the corresponding processing technology is easy to generate uneven thickness, and the minimum thickness area is difficult to reach the thickness requirement of a product. Moreover, the strength, rigidity and damping of the material are general, higher sound intensity cannot be achieved, resonance is easy to generate, and the shouting definition is not high, so that the effect is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a composite material cone for a strong sound rejection driving-off device and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme: the basin body of the composite material basin is designed into an integrated multi-element conical structure; designing and preparing a die comprising a multi-element conical cavity with an integrated structure according to the composite material cone structure; the invention adopts fiber fabric and prepared epoxy resin, and the integral molding is manufactured by vacuum adsorption injection molding process, thereby realizing the purpose of the invention.
The invention also relates to a composite material cone for the strong sound rejection driving-off device, which is made of fiber fabric and epoxy resin and comprises a top flat plate outer edge and a multi-element cone-shaped cone body with an integral structure; the outer edge of the top flat plate is positioned at the outer side of the top of the conical basin body; a bulge is arranged at the center of the bottom of each cone-shaped basin body, and connecting holes are arranged around the bottoms of the bulges; the outer edge of the top flat plate is provided with a connecting hole.
Preferably, the fiber fabric comprises plain aramid fiber fabric, twill aramid fiber fabric and aromatic carbon hybrid fiber fabric, and the surface density is 100g/m 2 ～400g/m 2 。
Preferably, the epoxy resin has a viscosity of less than or equal to 500 mPa.S at normal temperature and a loss factor of the cured product of 0.70-0.85 and is prepared from 20-50 parts by mass of TDE-85 epoxy resin, 50-80 parts by mass of E-51 epoxy resin, 15-30 parts by mass of reactive epoxy diluent and 40-50 parts by mass of T403 curing agent
The invention also relates to a preparation method of the composite material cone for the strong-sound rejection driving-off device, which comprises the following operation steps:
1) Preparing and processing a mould: the die comprises a plurality of conical cavities matched with the number and the structure of the conical basin bodies and a flat plate positioned on the outer side of the top of each conical cavity; the surface of the die is smooth and flat, and a release agent is coated before use;
2) Preparing a composite cone preform: cutting the fiber fabric according to the design requirement; spreading the fiber fabric along the whole cone-shaped cavity surface, shaping by using a shaping agent, and staggering the overlapping parts between adjacent spreading layers to obtain a composite material cone preform;
3) Preparing a composite cone blank: preparing epoxy resin components in proportion, uniformly mixing and defoaming, and then soaking the cone preform by using a vacuum adsorption injection molding process to prepare a composite cone blank;
4) Post-treatment: trimming the blank of the cone, perfecting the defect of local tiny pores, and spraying paint to prepare the finished product of the cone made of the composite material for the strong-sound rejection driving-off device.
Preferably, the epoxy resin has a viscosity of 500 mPa.S or less at normal temperature and a loss factor of 0.70-0.85, and is prepared from 20-50 parts by mass of TDE-85 epoxy resin, 50-80 parts by mass of E-51 epoxy resin, 15-30 parts by mass of reactive epoxy diluent and 40-50 parts by mass of T403 curing agent.
Further preferred, the reactive epoxy diluent is 678 or 669 reactive epoxy diluent.
Preferably, the epoxy resin is cured at normal temperature when the composite cone blank is prepared.
Preferably, the epoxy resin is cured in a temperature environment heated to 80 ℃ during the preparation of the composite cone blank.
Further preferably, when the composite cone blank is prepared, the heating of the epoxy resin is realized by arranging a graphene flexible electrothermal film on the composite cone preform.
Still further preferably, the graphene flexible electrothermal film starts to heat after resin injection is completed.
The basin body of the composite material basin of the strong sound and strong light separation system is of an integrated multielement conical structure, is manufactured by adopting a high-strength, high-modulus and high-toughness fiber fabric and a high-toughness and high-damping epoxy resin system, has the advantages of high overall structural strength, high rigidity, good damping, strong stability, outstanding sound intensity, excellent sound directivity, speaking definition and the like, and overcomes the defects that the sound intensity is not high, resonance is easy to generate and the like in the basin prepared by engineering plastics such as polypropylene and the like in the prior art. The invention relates to a preparation method of a sound-intensity light-emitting system composite material cone, which comprises the steps of designing and preparing a mould comprising a multi-element conical cavity with an integrated structure, integrally paving cut fiber fabrics in the cavity of the mould to prepare a preformed body, manufacturing the preformed body by utilizing a vacuum adsorption and infusion molding process, impregnating prepared epoxy resin into the preformed body, curing and molding the preformed body, and performing post-treatment.
Drawings
FIG. 1 is a schematic view of a composite basin according to an embodiment;
FIG. 2 is a top view of a composite basin according to an embodiment;
FIG. 3 is a cross-sectional view of a composite basin according to an embodiment.
Wherein, 1-top flat plate outer edge, 2-connecting hole, 3-bulge, 4-vertical side, 5-cone basin.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example 1
The composite material cone for the strong sound rejection driving-off system is of a three-way structure with equal wall thickness, and consists of a top flat plate outer edge 1 and three cone-shaped cone bodies 5 of an integral structure, wherein the top flat plate outer edge 1 is positioned on the outer side of the top of the cone-shaped cone bodies 5, as shown in figures 1 to 3. A bulge 3 is arranged at the center of the bottom of each cone-shaped basin body 5 and is used for placing a sounding component; four connecting holes 2 are uniformly distributed around the bottom of the bulge 3 and are used for fixedly connecting with the sounding component; the top of the side wall is provided with an upstanding side surface 4 for defining the horizontal position of the cone-shaped basin 5 in the interior cavity of the housing. The top flat plate outer edge 1 is positioned above the shell, is used for limiting the position of the conical basin body 5 in the height direction of the inner cavity of the shell, and is convenient to take and place; four connecting holes 2 are formed in the outer edge 1 of the top plate and are fixedly connected with the shell.
The composite material cone for the strong sound rejection and separation prevention system is made of high-toughness high-damping aramid fiber fabric reinforced epoxy resin matrix composite material. The method comprises the following specific steps:
and (5) preparing and processing a mould. The mold is designed and prepared according to the composite material cone structure, and comprises three conical cavities of an integral structure and a flat plate positioned on the outer side of the top of each conical cavity, and is prepared from a metal material. Cleaning the mould and coating a release agent on the surface of the mould.
Preparing a composite cone preform. Cutting aramid fiber fabric, paving plain aramid fiber fabric along the conical cavity type surface, shaping by using a shaping agent, staggering the lap joint parts between adjacent layers, and paving 8 layers together to obtain the composite cone preform.
And (3) preparing a resin system. 20 parts of TDE-85 epoxy resin, 80 parts of E-51 epoxy resin, 15 parts of 669 reactive diluent and 40 parts of T403 curing agent are weighed and uniformly mixed to prepare an epoxy resin system with the viscosity of 500 mPa.S at normal temperature, and the loss factor of a cured product is 0.70.
Vacuum adsorption and pouring to form blank of composite material cone. Spreading demolding cloth and a diversion net on the surface of the prepared composite material cone preform, placing diversion pipes and glue injection bases on two sides of the composite material cone preform, placing glue injection pipelines and glue outlet pipelines, and then packaging a vacuum bag. And (3) pouring the prepared resin glue solution after vacuum defoamation by using a vacuum pump, closing a glue injection port valve after the surface of the composite material cone preform is fully impregnated with the epoxy resin glue solution, continuously maintaining vacuum pumping, placing a graphene flexible electrothermal film on the surface of a vacuum bag, keeping close fit with the surface of the composite material cone, setting the temperature to be 80 ℃, solidifying for 2 hours at the temperature, and demoulding after the composite material cone is naturally cooled to room temperature to obtain an aramid composite material cone blank.
And (5) post-treatment. And cutting the peripheral corners of the obtained composite material cone blank to obtain a regular composite material cone component meeting the size requirement, checking the surface finish condition of the inner cavity of the cone, putty-spraying and repairing the local pits, and spraying paint on the surface after repairing to obtain a finished product of the composite material cone.
The composite material cone for the strong sound rejection and separation system, which is prepared by the embodiment, is made of an aramid fiber fabric reinforced epoxy resin composite material consisting of an aramid fiber fabric with high strength, high modulus and high toughness and an epoxy resin system with high toughness and high damping, has the advantages of high overall structural strength, high rigidity, good damping property, high stability, high sound intensity up to 160dB/m, effective voice broadcasting distance of more than or equal to 2km, dispersing distance of more than or equal to 550m, uniform overall thickness of the cone, error of less than or equal to 0.5mm, capability of meeting product requirements in a minimum thickness area, and no occurrence of resonance phenomenon.
Example 2:
the composite material cone structure for the strong sound rejection and separation system of the embodiment is the same as that of the first embodiment.
The composite material cone for the strong sound rejection and separation prevention system is made of high-toughness high-damping aramid fiber fabric reinforced epoxy resin matrix composite material. The method comprises the following specific steps:
and (5) preparing and processing a mould. The mold is designed and prepared according to the structure of the composite material cone, and comprises three conical cavities and a flat plate, wherein the three conical cavities are integrally structured, the flat plate is positioned on the outer side of the top of each conical cavity, and the mold is prepared by using epoxy resin/fiber reinforced resin matrix composite materials at low temperature and high temperature. Cleaning the mould and coating a release agent on the surface of the mould.
And (5) preparing a preform. Cutting aramid fiber fabric, paving twill aramid fiber fabric along the conical cavity type surface, shaping by using a shaping agent, staggering the lap joint parts between adjacent layers, and paving 20 layers together to obtain the cone preform.
And (3) preparing a resin system. 50 parts of TDE-85 epoxy resin, 50 parts of E-51 epoxy resin, 30 parts of 669 reactive diluent and 50 parts of T403 curing agent are weighed and uniformly mixed to prepare an epoxy resin system with the viscosity of 300 mPa.S at normal temperature, and the loss factor of a cured product is 0.85.
Vacuum adsorption and pouring to form blank of composite material cone. Spreading demolding cloth and a diversion net on the surface of the prepared composite material cone preform, placing diversion pipes and glue injection bases on two sides of the composite material cone preform, placing glue injection pipelines and glue outlet pipelines, and then packaging a vacuum bag. And (3) pouring the prepared resin glue solution after vacuum defoamation by using a vacuum pump, closing a glue injection port valve after the surface of the composite material cone preform is fully impregnated with the epoxy resin glue solution, continuously maintaining vacuum pumping, solidifying for 48 hours at room temperature, and demoulding after the cone is naturally cooled to the room temperature to obtain the aramid fiber composite material cone blank.
And (5) post-treatment. And cutting the peripheral corners of the obtained composite material cone blank to obtain a regular composite material cone component meeting the size requirement, checking the surface finish condition of the inner cavity of the cone, putty-spraying and repairing the local pits, and spraying paint on the surface after repairing to obtain a finished product of the composite material cone.
The composite material cone for the strong sound rejection and separation system, which is prepared by the embodiment, is made of an aramid fiber fabric reinforced epoxy resin composite material consisting of an aramid fiber fabric with high strength, high modulus and high toughness and an epoxy resin system with high toughness and high damping, has the advantages of high overall structural strength, high rigidity, good damping, high stability, high sound intensity up to 165dB/m, effective voice broadcasting distance of more than or equal to 2km, dispersing distance of more than or equal to 550m, uniform overall thickness of the cone, error of less than or equal to 0.5mm, capability of meeting product requirements in a minimum thickness area, and no occurrence of resonance phenomenon.
Example 3:
the composite material cone for the strong sound rejection and separation system is of a quaternary structure and consists of a top flat plate outer edge 1 and four cone-shaped cone bodies 5 of an integral structure.
The composite material cone for the strong sound rejection and separation prevention system is made of high-toughness high-damping aromatic carbon hybrid fiber fabric reinforced epoxy resin matrix composite material. The method comprises the following specific steps:
and (5) preparing and processing a mould. The mold is designed and prepared according to the composite material cone structure and comprises four conical cavities of an integrated structure and a flat plate positioned on the outer side of the top of each conical cavity. Cleaning the mould and coating a release agent on the surface of the mould.
And (5) preparing a preform. Cutting aramid fiber fabric, paving aromatic carbon hybrid fiber fabric along the profile of the conical cavity, shaping by using a shaping agent, staggering the lap joint parts between adjacent layers, and paving 12 layers together to obtain the cone preform.
And (3) preparing a resin system. 30 parts of TDE-85 epoxy resin, 70 parts of E-51 epoxy resin, 25 parts of 678 reactive diluent and 45 parts of T403 curing agent are weighed and uniformly mixed to prepare an epoxy resin system with the viscosity of 400 mPa.S, and the loss factor of the cured product is 0.75.
Vacuum adsorption and pouring to form blank of composite material cone. Spreading demolding cloth and a diversion net on the surface of the prepared composite material cone preform, placing diversion pipes and glue injection bases on two sides of the composite material cone preform, placing glue injection pipelines and glue outlet pipelines, and then packaging a vacuum bag. And (3) pouring the prepared resin glue solution after vacuum defoamation by using a vacuum pump, closing a glue injection port valve after the surface of the composite material cone preform is fully impregnated with the epoxy resin glue solution, continuously maintaining vacuum pumping, placing a graphene flexible electrothermal film on the surface of a vacuum bag, keeping close fit with the surface of the cone, setting the temperature to be 80 ℃, solidifying for 2 hours at the temperature, and demoulding after the composite material cone is naturally cooled to room temperature to obtain an aromatic carbon hybrid composite material cone blank.
And (5) post-treatment. And cutting the peripheral corners of the obtained composite material cone blank to obtain a regular cone component meeting the size requirement, checking the surface finish condition of the inner cavity of the composite material cone, putty-spraying and repairing the local pits, and spraying paint on the surface after repairing to obtain a finished product of the composite material cone.
The composite material cone for the strong sound rejection and separation system, which is prepared by the embodiment, is made of an aromatic carbon hybrid fiber fabric reinforced epoxy resin composite material consisting of an aromatic fiber fabric with high strength, high modulus and high toughness and an epoxy resin system with high toughness and high damping, has the advantages of high overall structural strength, high rigidity, good damping performance, high stability, high sound intensity up to 163dB/m, effective voice broadcasting distance of more than or equal to 2km, dispersing distance of more than or equal to 550m, uniform overall thickness of the cone, error of less than or equal to 0.5mm, capability of meeting product requirements in a minimum thickness area, and no occurrence of resonance phenomenon.

Claims (10)

1. A composite material cone for a strong sound rejection driving-off device is characterized in that: is made of fiber fabric and epoxy resin, and comprises a top flat outer edge (1) and a multi-element cone-shaped basin body (5) with an integral structure; the top flat plate outer edge (1) is positioned at the outer side of the top of the conical basin body (5); a bulge (3) is arranged at the center of the bottom of each cone-shaped basin body (5), and connecting holes (2) are arranged around the bottom of the bulge (3); the outer edge (1) of the top flat plate is provided with a connecting hole (2).
2. The composite cone for a strong sound rejection and driving-off device according to claim 1, wherein: the fiber fabric comprises plain aramid fiber fabric, twill aramid fiber fabric and aromatic carbon hybrid fiber fabric, and the surface density is 100g/m 2 ～400g/m 2 。
3. The composite cone for a strong sound rejection and driving-off device according to claim 1, wherein: the epoxy resin has the viscosity of less than or equal to 500 mPa.S at normal temperature, and the loss factor of a cured product is 0.70-0.85, and is prepared from 20-50 parts by mass of TDE-85 epoxy resin, 50-80 parts by mass of E-51 epoxy resin, 15-30 parts by mass of active epoxy diluent and 40-50 parts by mass of T403 curing agent.
4. A method for preparing the composite cone for the strong-sound rejection driving-off device according to claim 1, which is characterized in that: the operation steps are as follows:
1) Preparing and processing a mould: the die comprises a plurality of conical cavities and a flat plate, wherein the conical cavities are matched with the conical basin bodies (5) in number and structure, and the flat plate is positioned on the outer side of the top of each conical cavity; the surface of the die is smooth and flat, and a release agent is coated before use;
2) Preparing a composite cone preform: cutting the fiber fabric according to the design requirement; spreading the fiber fabric along the whole cone-shaped cavity surface, shaping by using a shaping agent, and staggering the overlapping parts between adjacent spreading layers to obtain a composite material cone preform;
3) Preparing a composite cone blank: preparing epoxy resin components in proportion, uniformly mixing and defoaming, and then soaking the cone preform by using a vacuum adsorption injection molding process to prepare a composite cone blank;
4) Post-treatment: trimming the blank of the cone, perfecting the defect of local tiny pores, and spraying paint to prepare the finished product of the cone made of the composite material for the strong-sound rejection driving-off device.
5. The method for preparing the composite material cone for the strong-sound rejection and driving-off device, according to claim 4, is characterized in that: the epoxy resin has the viscosity of less than or equal to 500 mPa.S at normal temperature, and the loss factor of a cured product is 0.70-0.85, and is prepared from 20-50 parts by mass of TDE-85 epoxy resin, 50-80 parts by mass of E-51 epoxy resin, 15-30 parts by mass of active epoxy diluent and 40-50 parts by mass of T403 curing agent.
6. The method for manufacturing the composite cone for the strong-sound rejection and driving-off device according to claim 5, wherein the method comprises the following steps: the reactive epoxy diluent is 678 or 669 reactive epoxy diluent.
7. The method for preparing the composite material cone for the strong-sound rejection and driving-off device, according to claim 4, is characterized in that: when the composite cone blank is prepared, the epoxy resin is solidified at normal temperature.
8. The method for preparing the composite material cone for the strong-sound rejection and driving-off device, according to claim 4, is characterized in that: when the composite cone blank is prepared, the epoxy resin is cured in a temperature environment heated to 80 ℃.
9. The method for preparing the composite material cone for the strong-sound rejection and driving-off device according to claim 8, which is characterized by comprising the following steps: when the composite material cone blank is prepared, the heating of the epoxy resin is realized by arranging the graphene flexible electrothermal film on the composite material cone preform.
10. The method for manufacturing the composite cone for the strong-sound rejection and driving-off device according to claim 9, wherein the method comprises the following steps: and heating the graphene flexible electrothermal film after resin glue injection is completed.
CN202310478180.3A 2023-04-28 2023-04-28 Composite material cone for strong sound rejection driving-off device and preparation method thereof Pending CN116489566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310478180.3A CN116489566A (en) 2023-04-28 2023-04-28 Composite material cone for strong sound rejection driving-off device and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310478180.3A CN116489566A (en) 2023-04-28 2023-04-28 Composite material cone for strong sound rejection driving-off device and preparation method thereof

Publications (1)

Publication Number Publication Date
CN116489566A true CN116489566A (en) 2023-07-25

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Country Status (1)

Country Link
CN (1) CN116489566A (en)

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