CN110920090B - Preparation method of sound liner made of sound-deadening and noise-reducing composite material - Google Patents

Preparation method of sound liner made of sound-deadening and noise-reducing composite material Download PDF

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Publication number
CN110920090B
CN110920090B CN201911194735.1A CN201911194735A CN110920090B CN 110920090 B CN110920090 B CN 110920090B CN 201911194735 A CN201911194735 A CN 201911194735A CN 110920090 B CN110920090 B CN 110920090B
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plate
sound
perforated plate
noise
rubber
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CN110920090A (en
Inventor
马秀菊
黎玉钦
倪敏轩
郭渊
盛毅
罗旭慧
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Aerospace Haiying Zhenjiang Special Material Co ltd
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Aerospace Haiying Zhenjiang Special Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/04—Making preforms by assembling preformed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • B29C51/145—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets having at least one layer of textile or fibrous material combined with at least one plastics layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/46—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Textile Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a preparation method of a sound liner made of a noise-reducing composite material, which is based on the traditional sound liner gluing process.A glue blocking plate is introduced into a non-gluing surface of a perforated plate, so that a glue film is effectively prevented from flowing in holes of the perforated plate in a high-temperature and high-pressure gluing forming environment of an autoclave, the gluing hole blocking rate of a sound liner part is greatly reduced, the sound-absorbing and noise-reducing performance of the part is effectively ensured, and the yield of the part is improved; the rubber blocking plate used in the invention has simple forming process and common materials, and greatly reduces the production cost on the premise of ensuring the quality of parts.

Description

Preparation method of sound liner made of sound-deadening and noise-reducing composite material
Technical Field
The invention relates to a preparation method of a sound liner made of a noise-reducing composite material.
Background
The problem of aircraft noise has always been a problem which is extremely interesting and difficult to solve for designers in various countries, especially in the field of civil aircrafts, where the noise in the passenger cabin and airports has to be strictly controlled, which is a necessary factor for both the requirement of riding comfort and the creation of an environmentally friendly society. The noise of the airplane mainly comes from the engine, so that the noise of the airplane can be effectively solved as long as the noise of the engine can be effectively controlled and reduced. Engine noise reduction techniques can be divided into two categories: source control techniques and process control techniques. Wherein the process control technique refers to a control technique that effectively attenuates noise over its path of propagation. For example, noise reduction structures such as acoustical liners are used in nacelles to absorb attenuated noise and the like. Therefore, the riding experience of the plane is directly influenced by the quality of the sound absorption and noise reduction performance of the engine sound lining, and the economic benefit of the whole civil plane is further influenced.
With the development of the design and manufacturing technology of the acoustic liner, the sound absorption and noise reduction performance of the acoustic liner is greatly improved, but the noise reduction performance of the acoustic liner is always influenced by the hole blocking problem in the process of gluing the perforated plate and the honeycomb of the acoustic liner. At present, high-pressure gas is used for blowing off glue films in holes before the perforated plate is bonded with the honeycomb, but the glue films have certain toughness, and burrs are easy to generate in the blowing-off process; therefore, the sound lining is easy to flow in a high-temperature and high-pressure glue joint curing environment, blocks the perforated plate and reduces the sound absorption and noise reduction performance of the sound lining.
Disclosure of Invention
Aiming at the existing problems, the invention provides a preparation method of a sound liner made of a noise-reducing composite material, aiming at solving the problem of hole blocking formed in the gluing and curing process of the sound liner, improving the perforation rate of the sound liner and ensuring the noise reduction performance. The specific technical scheme is as follows:
a preparation method of a sound liner made of a sound-deadening and noise-reducing composite material comprises the following steps:
the method comprises the following steps: preparation of rubber plugging plate
Processing an auxiliary flat plate and a rubber plugging plate preformed body which have the same size as the perforated plate, respectively cleaning the perforated plate, the auxiliary flat plate and the rubber plugging plate preformed body by using a release agent, laying the cementing surface of the perforated plate on the auxiliary flat plate after drying by an oven, laying the rubber plugging plate preformed body on the non-cementing surface of the auxiliary flat plate, and then packaging, vacuumizing and pre-pressing to form a three-plate integrated assembly; sending the three-plate integrated assembly into an autoclave for hot pressing treatment under the condition of high temperature and high pressure, and forming a rubber plugging plate after hot pressing of the rubber plugging plate preformed body;
step two: perforated plate and honeycomb glue joint
Removing the auxiliary flat plate from the hot-pressed three-plate integrated component in the step one to obtain a perforated plate and a glue blocking plate to form a combined piece; polishing the cementing surface of the perforated plate by using abrasive paper, cleaning by using acetone and drying; cutting a glue film with the same size as the perforated plate, compacting the glue film on the gluing surface of the perforated plate by using a vacuum bag, and then removing the glue film on the holes of the perforated plate; paving and pasting honeycombs on the surface, pasted with the glue film, of the perforated plate, and vacuumizing and pre-compacting;
step three: glue jointed backboard
Paving a layer of adhesive film on the honeycomb which is bonded with the perforated plate in the step two, and then bonding a back plate on the honeycomb through adhesive film positioning glue to form a sound lining preformed body;
step four:
and (3) packaging the sound lining preformed body obtained in the third step, then sending the sound lining preformed body into an autoclave for co-curing and connecting, taking the sound lining preformed body out of the autoclave, cooling and demolding to obtain the sound lining made of the sound-deadening and noise-reducing composite material.
Preferably, in the first step, the auxiliary flat plate is a metal plate or a resin-based composite material laminated plate; the preformed body of the rubber plugging plate is formed by paving and pasting two layers of rubber materials; the rubber material is preferably ordinary silicon rubber, and the thickness of the rubber layer material is preferably 2-4 mm.
In a preferred embodiment, in the first step, the conditions of the hot pressing treatment are as follows: the hot pressing temperature is 140-190 ℃, the hot pressing pressure is 0.4-0.6 Mpa, and the hot pressing time is 2-5 hours.
In the second step, the adhesive film on the holes of the perforated plate is removed by using a special round hole cutter, wherein the round hole cutter is a metal cutter, and the diameter of the cutter edge of the round hole cutter is larger than that of the holes of the perforated plate. Preferably, the round hole cutter is a steel cutter, and the diameter of the cutter edge of the round hole cutter is 0.1-0.5 mm larger than that of the hole of the perforated plate.
As a preferable technical solution, in the fourth step, the co-curing connection conditions are as follows: the curing temperature is 150-180 ℃, the curing pressure is 0.2-0.3 Mpa, and the curing time is 2-5 hours.
The invention has the beneficial effects that:
(1) compared with the traditional bonding process of the honeycomb sound lining structure, the rubber plugging rubber plate used in the invention has certain expansion performance under the conditions of high temperature and high pressure, and can effectively plug the micropores of the perforated plate, and the rubber material is a flexible material, so that the hole wall structure of the honeycomb can not be damaged under the condition of plugging the flowing glue film.
(2) The circular hole cutter used in the invention is a customized cutter, the diameter of the circular hole cutter is larger than that of the perforated plate, redundant glue films in the hole can be effectively removed after the circular hole cutter is aligned with the edge of the hole (the glue films and the perforated plate can obviously protrude the edge of the hole after being pre-compacted), and excessive glue film burrs and flashes cannot be generated.
(3) The rubber plugging plate used in the invention has good flexibility after sufficient vulcanization reaction at high temperature and high pressure, and can effectively support the pulling-out of the rubber material in the hole in the demoulding process, and the whole performance of a hard part in the perforated plate is continuously improved.
(4) The auxiliary materials used in the invention are common and easily available materials, and the process is simple, so that the production cost of parts is greatly reduced, and the method has good market popularization adaptability.
Drawings
FIG. 1 is a schematic structural view of a three-panel integrated assembly of the present invention;
fig. 2 is a schematic representation of the acoustic liner preform structure of the present invention.
In the figure: 1. a perforated plate; 2. an auxiliary plate; 3. plugging the preformed body of the rubber plate; 4. plugging a rubber plate; 5. a glue film; 6. honeycombing; 7. a back plate; 8. packaging materials; 9. and sealing rubber strips.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only one embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the present embodiment, belong to the protection scope of the present invention.
The embodiment provides a preparation method of a sound liner made of a sound-deadening and noise-reducing composite material, which comprises the following steps:
the method comprises the following steps: preparation of rubber plugging plate
Processing an auxiliary flat plate 2 and a rubber plugging plate preformed body 3 which have the same size as the perforated plate 1, wherein the auxiliary flat plate 2 can be a metal plate or a resin matrix composite laminated plate, the rubber plugging plate preformed body 3 is formed by paving and pasting two layers of rubber materials, the used rubber material is common silicone rubber, and the thickness of the rubber layer material is 2-4 mm; then, a release agent is used for respectively cleaning the perforated plate 1, the auxiliary flat plate 2 and the plugging rubber plate preformed body 3, after being dried by an oven, the cementing surface of the perforated plate 1 is laid on the auxiliary flat plate 2, the plugging rubber plate preformed body 3 is laid on the non-cementing surface of the perforated plate, then the perforated plate is packaged by a packaging material 8, and the perforated plate, the auxiliary flat plate and the plugging rubber plate preformed body are sealed by a sealing rubber strip 9 and then vacuumized and pre-pressed to form a three-plate integrated component; and (3) conveying the three-plate integrated assembly into an autoclave for hot pressing treatment for 2-5 hours at the temperature of 140-190 ℃ and under the pressure of 0.4-0.6 Mpa, so that the rubber plugging plate preform 3 is hot pressed to form a rubber plugging plate 4, as shown in figure 1.
Step two: perforated plate and honeycomb glue joint
Removing the auxiliary flat plate 2 from the hot-pressed three-plate integrated component in the step one to obtain a combined part formed by the perforated plate 1 and the rubber plugging plate 4; polishing the cementing surface of the perforated plate 1 by using abrasive paper, cleaning by using acetone and drying; cutting a glue film 5 with the same size as the perforated plate 1, compacting the glue film 5 on the gluing surface of the perforated plate 1 by using a vacuum bag, and then excavating the glue film 5 on the holes of the perforated plate 1 by using a specially-made round hole cutter, wherein the round hole cutter is a metal cutter, such as a steel cutter, the diameter of the edge of the round hole cutter is greater than the diameter of the hole of the perforated plate 1, and the preferred diameter of the edge of the round hole cutter is 0.1-0.5 mm greater than the diameter of the hole of the perforated plate 1. Then, the honeycomb 6 is laid on the face of the perforated plate 1 to which the adhesive film 5 is attached, and vacuum pre-compaction is performed.
Step three: glue jointed backboard
And paving a layer of adhesive film 5 on the honeycomb 6 bonded with the perforated plate 1 in the second step, and then positioning and bonding the back plate 7 on the honeycomb 6 through the adhesive film 5 to form the acoustic lining preform, as shown in fig. 2.
Step four:
packaging the sound lining pre-formed body obtained in the third step by using packaging materials 8 such as isolating films, breathable felts, vacuum bags and the like and a sealing rubber strip 9, and then sending the packaged sound lining pre-formed body into an autoclave for co-curing connection together, wherein the co-curing connection conditions are as follows: curing temperature is 150-180 ℃, curing pressure is 0.2-0.3 Mpa, and curing time is 2-5 hours; and (5) taking the material out of the tank, cooling and demolding to obtain the sound lining made of the noise-reducing composite material.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. Furthermore, it should be understood that the above description is only one preferred embodiment of the present invention, and is not intended to limit the present invention in any way, as those skilled in the art may change or modify the equivalent embodiments using the technical disclosure described above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims (6)

1. A preparation method of a sound liner made of a noise-reducing composite material is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: preparation of rubber plugging plate
Processing an auxiliary flat plate and a rubber plugging plate preformed body which have the same size as the perforated plate, respectively cleaning the perforated plate, the auxiliary flat plate and the rubber plugging plate preformed body by using a release agent, laying the cementing surface of the perforated plate on the auxiliary flat plate after drying by an oven, laying the rubber plugging plate preformed body on the non-cementing surface of the auxiliary flat plate, and then packaging, vacuumizing and pre-pressing to form a three-plate integrated assembly; sending the three-plate integrated assembly into an autoclave for hot pressing treatment under the condition of high temperature and high pressure, and forming a rubber plugging plate after hot pressing of the rubber plugging plate preformed body; the preformed body of the rubber plugging plate is formed by paving and pasting two layers of rubber materials; the conditions of the hot pressing treatment are as follows: the hot pressing temperature is 140-190 ℃, the hot pressing pressure is 0.4-0.6 Mpa, and the hot pressing time is 2-5 hours;
step two: perforated plate and honeycomb glue joint
Removing the auxiliary flat plate from the hot-pressed three-plate integrated component in the step one to obtain a perforated plate and a glue blocking plate to form a combined piece; polishing the cementing surface of the perforated plate by using abrasive paper, cleaning by using acetone and drying; cutting a glue film with the same size as the perforated plate, compacting the glue film on the gluing surface of the perforated plate by using a vacuum bag, and then removing the glue film on the holes of the perforated plate; paving and pasting honeycombs on the surface, pasted with the glue film, of the perforated plate, and vacuumizing and pre-compacting;
step three: glue jointed backboard
Paving a layer of adhesive film on the honeycomb which is bonded with the perforated plate in the step two, and then bonding a back plate on the honeycomb through adhesive film positioning glue to form a sound lining preformed body;
step four:
and (3) packaging the sound lining preformed body obtained in the third step, then sending the sound lining preformed body into an autoclave for co-curing and connecting, taking the sound lining preformed body out of the autoclave, cooling and demolding to obtain the sound lining made of the sound-deadening and noise-reducing composite material.
2. The method of making a sound-damping and noise-reducing composite acoustical liner of claim 1, wherein: in the first step, the auxiliary flat plate is a metal plate or a resin-based composite material laminated plate.
3. The method of making a sound-damping and noise-reducing composite acoustical liner of claim 2, wherein: the rubber material is common silicone rubber.
4. The method of making a sound-damping and noise-reducing composite acoustical liner of claim 1, wherein: and in the second step, the adhesive film on the holes of the perforated plate is removed by using a special round hole cutter, wherein the round hole cutter is a metal cutter, and the diameter of the cutter edge of the round hole cutter is larger than that of the holes of the perforated plate.
5. The method of making a sound-damping and noise-reducing composite acoustical liner of claim 4, wherein: the round hole cutter is a steel cutter, and the diameter of the cutter edge of the round hole cutter is 0.1-0.5 mm larger than that of the hole of the perforated plate.
6. The method of making a sound-damping and noise-reducing composite acoustical liner of claim 1, wherein: in the fourth step, the co-curing connection conditions are as follows: the curing temperature is 150-180 ℃, the curing pressure is 0.2-0.3 Mpa, and the curing time is 2-5 hours.
CN201911194735.1A 2019-11-28 2019-11-28 Preparation method of sound liner made of sound-deadening and noise-reducing composite material Active CN110920090B (en)

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CN113878886B (en) * 2021-06-17 2022-08-09 中国航空工业集团公司济南特种结构研究所 Composite material silencing nacelle sound lining maintenance method

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Publication number Priority date Publication date Assignee Title
CN106393710A (en) * 2016-11-08 2017-02-15 深圳市知宇新材料应用研究院有限公司 Gluing method, structure and parts of micro-perforated panel and honeycomb sandwich structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106393710A (en) * 2016-11-08 2017-02-15 深圳市知宇新材料应用研究院有限公司 Gluing method, structure and parts of micro-perforated panel and honeycomb sandwich structure

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