CN110588535A - Install sound insulation construction at automobile front wall board - Google Patents
Install sound insulation construction at automobile front wall board Download PDFInfo
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- CN110588535A CN110588535A CN201910933470.6A CN201910933470A CN110588535A CN 110588535 A CN110588535 A CN 110588535A CN 201910933470 A CN201910933470 A CN 201910933470A CN 110588535 A CN110588535 A CN 110588535A
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- Prior art keywords
- sound insulation
- parts
- front wall
- cavity
- antioxidant
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- 238000009413 insulation Methods 0.000 title claims abstract description 39
- 238000010276 construction Methods 0.000 title description 2
- -1 polypropylene Polymers 0.000 claims abstract description 44
- 239000004743 Polypropylene Substances 0.000 claims abstract description 40
- 229920001155 polypropylene Polymers 0.000 claims abstract description 40
- 239000012774 insulation material Substances 0.000 claims abstract description 24
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 21
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 21
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000007822 coupling agent Substances 0.000 claims abstract description 11
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 11
- 239000000314 lubricant Substances 0.000 claims abstract description 11
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 11
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 11
- 239000011787 zinc oxide Substances 0.000 claims abstract description 11
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 15
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000003508 Dilauryl thiodipropionate Substances 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 235000019304 dilauryl thiodipropionate Nutrition 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 7
- VNQNXQYZMPJLQX-UHFFFAOYSA-N 1,3,5-tris[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CN2C(N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C(=O)N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C2=O)=O)=C1 VNQNXQYZMPJLQX-UHFFFAOYSA-N 0.000 claims description 5
- ODJQKYXPKWQWNK-UHFFFAOYSA-L 3-(2-carboxylatoethylsulfanyl)propanoate Chemical compound [O-]C(=O)CCSCCC([O-])=O ODJQKYXPKWQWNK-UHFFFAOYSA-L 0.000 claims description 5
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 claims description 5
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 5
- 239000007983 Tris buffer Substances 0.000 claims description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 5
- 238000012360 testing method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0815—Acoustic or thermal insulation of passenger compartments
- B60R13/0823—Insulating partitions, e.g. between front and rear seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0884—Insulating elements, e.g. for sound insulation for mounting around noise sources, e.g. air blowers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
The invention discloses a sound insulation structure arranged on a front wall plate of an automobile, which is arranged on one side of the front wall plate close to a cab and comprises a cavity plate, wherein the cavity plate is arranged on the front wall plate, and a sealed cavity is arranged between the cavity plate and the front wall plate; a sound insulation board is arranged in the cavity, and a polyurethane foam filling agent is filled between the sound insulation board and the inner wall of the cavity; the sound insulation board consists of a first moisture-proof layer, a polypropylene modified sound insulation material layer and a second moisture-proof layer which are sequentially attached; the polypropylene modified sound insulation material layer is composed of the following raw materials in parts by weight: 85-90 parts of polypropylene, 10-12 parts of talcum powder, 0.1-0.3 part of coupling agent, 0.3-1.2 parts of heat stabilizer, 0.2-0.5 part of lubricant, 0.3-0.7 part of white oil, 1.1-1.3 parts of antioxidant, 30-35 parts of zinc oxide and 11-21 parts of magnesium oxide. The invention can effectively reduce the noise generated by the engine in the vehicle cab and improve the driving comfort of the vehicle.
Description
Technical Field
The invention relates to a sound insulation structure arranged on a front wall plate of an automobile, and belongs to the technical field of vehicle structures.
Background
The front wall board is a clapboard between an engine compartment and a carriage, is connected with a floor and a front upright post, and is arranged below an upper cover plate of a front wall. The dash panel has a plurality of openings for passage of operating wires, rods, pipes and wiring harnesses and for attachment of pedals, square columns and the like.
At present, with stricter and stricter regulations on Noise control and continuously improved requirements of users on comfort of acoustic environments in automobiles, automobile enterprises increasingly attach importance to the aim of achieving vibration and Noise reduction from the beginning of design, and the performance of automobile NVH (Noise, Noise and harshness) becomes an important design index for evaluating the performance of the whole automobiles. The NVH research of automobiles relates to a plurality of components, wherein an automobile front wall plate is an important part, the sound insulation performance of the automobile front wall plate directly influences the riding comfort, and sound insulation design research on the front wall plate can provide meaningful help for structure optimization.
Disclosure of Invention
The invention aims to provide a sound insulation structure mounted on a front wall plate of an automobile, which can effectively reduce noise generated by an engine in a cab of the automobile and improve driving comfort of the automobile.
In order to solve the technical problems, the invention adopts the following technical scheme:
a sound insulation structure installed on a front wall plate of an automobile is installed on one side, close to a cab, of the front wall plate and comprises a cavity plate, wherein the cavity plate is installed on the front wall plate, and a sealed cavity is formed between the cavity plate and the front wall plate; a sound insulation board is arranged in the cavity, and a polyurethane foam filling agent is filled between the sound insulation board and the inner wall of the cavity; the sound insulation board consists of a first moisture-proof layer, a polypropylene modified sound insulation material layer and a second moisture-proof layer which are sequentially attached; the polypropylene modified sound insulation material layer is composed of the following raw materials in parts by weight: 85-90 parts of polypropylene, 10-12 parts of talcum powder, 0.1-0.3 part of coupling agent, 0.3-1.2 parts of heat stabilizer, 0.2-0.5 part of lubricant, 0.3-0.7 part of white oil, 1.1-1.3 parts of antioxidant, 30-35 parts of zinc oxide and 11-21 parts of magnesium oxide.
In the sound insulation structure mounted on the front wall plate of the automobile, the first moisture-proof layer and the second moisture-proof layer are both polypropylene films.
In the sound insulation structure mounted on the front wall plate of the automobile, the performance indexes of the talc powder are as follows: the loss on ignition at 750 ℃ is less than or equal to 3 percent, the content of undissolved substances of hydrochloric acid is more than or equal to 95 percent, the content of silicon is more than or equal to 60 percent, and the percent represents the weight percentage; the antioxidant is one or more than two of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010), tris (2, 4-di-tert-butyl) phosphite (antioxidant 168), thiodipropionate stearate (DSTP), dilauryl thiodipropionate (DLTP) and 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid (antioxidant 3114).
In the sound insulation structure mounted on the front wall plate of the automobile, the polypropylene modified sound insulation material layer is prepared by the following method:
(1) mixing polypropylene, a coupling agent, a heat stabilizer, a lubricant, an antioxidant and white oil according to the weight parts, heating to 198 +/-15 ℃, and keeping for five minutes;
(2) mixing the magnesium oxide, the zinc oxide and the talcum powder according to the weight parts, heating to 203 +/-15 ℃, and keeping for five minutes;
(3) extruding, cooling and drying by a double-screw extruder;
(4) and heating the polypropylene modified sound insulation material to 175 +/-15 ℃ and banburying and molding under the pressure of 47 +/-5 MPa.
Compared with the prior art, the noise-reducing device can effectively reduce the noise generated by the engine in the vehicle cab and improve the driving comfort of the vehicle. The antetheca plate structure performance of this patent is leading in current antetheca board comprehensively. Especially, after the frequency is higher than 3000, the sound insulation performance of the front wall plate structure exceeds the existing sound insulation performance of more than 51%.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a graph of the results of a performance comparison experiment of this patent and the prior art.
Reference numerals: 1-front wall plate, 2-polyurethane foam filler, 3-polypropylene modified sound insulation material layer and 4-cavity plate.
The invention is further described with reference to the following figures and detailed description.
Detailed Description
Example 1 of the invention: a sound insulation structure installed on a front wall plate of an automobile is installed on one side, close to a cab, of a front wall plate 1 and comprises a cavity plate 4, wherein the cavity plate 4 is installed on the front wall plate 1, and a sealed cavity is formed between the cavity plate 4 and the front wall plate 1; a sound insulation board is arranged in the cavity, and a polyurethane foam filling agent 2 is filled between the sound insulation board and the inner wall of the cavity; the sound insulation board consists of a first moisture-proof layer, a polypropylene modified sound insulation material layer 3 and a second moisture-proof layer which are sequentially attached; the first moisture barrier and the second moisture barrier are both polypropylene films.
The polypropylene modified sound insulation material layer 3 is composed of the following raw materials in parts by weight: 85 parts of polypropylene, 10 parts of talcum powder, 0.1 part of coupling agent, 0.3 part of heat stabilizer, 0.2 part of lubricant, 0.3 part of white oil, 1.1 part of antioxidant, 30 parts of zinc oxide and 11 parts of magnesium oxide.
The performance indexes of the talc powder are as follows: the loss on ignition at 750 ℃ is less than or equal to 3 percent, the content of undissolved substances of hydrochloric acid is more than or equal to 95 percent, the content of silicon is more than or equal to 60 percent, and the percent represents the weight percentage; the antioxidant is one or more than two of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010), tris (2, 4-di-tert-butyl) phosphite (antioxidant 168), thiodipropionate stearate (DSTP), dilauryl thiodipropionate (DLTP) and 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid (antioxidant 3114).
The polypropylene modified sound insulation material layer 3 is prepared by the following method:
(1) mixing polypropylene, a coupling agent, a heat stabilizer, a lubricant, an antioxidant and white oil according to the weight parts, heating to 198 ℃, and keeping for five minutes;
(2) mixing the magnesium oxide, the zinc oxide and the talcum powder according to the weight parts, heating to 203 ℃, and keeping for five minutes;
(3) extruding, cooling and drying by a double-screw extruder;
(4) and heating the polypropylene modified sound insulation material to 175 ℃ and banburying and molding under the pressure of 47 MPa.
Example 2: a sound insulation structure installed on a front wall plate of an automobile is installed on one side, close to a cab, of a front wall plate 1 and comprises a cavity plate 4, wherein the cavity plate 4 is installed on the front wall plate 1, and a sealed cavity is formed between the cavity plate 4 and the front wall plate 1; a sound insulation board is arranged in the cavity, and a polyurethane foam filling agent 2 is filled between the sound insulation board and the inner wall of the cavity; the sound insulation board consists of a first moisture-proof layer, a polypropylene modified sound insulation material layer 3 and a second moisture-proof layer which are sequentially attached; the first moisture barrier and the second moisture barrier are both polypropylene films.
The polypropylene modified sound insulation material layer 3 is composed of the following raw materials in parts by weight: 90 parts of polypropylene, 12 parts of talcum powder, 0.3 part of coupling agent, 1.2 parts of heat stabilizer, 0.5 part of lubricant, 0.7 part of white oil, 1.3 parts of antioxidant, 35 parts of zinc oxide and 21 parts of magnesium oxide.
The performance indexes of the talc powder are as follows: the loss on ignition at 750 ℃ is less than or equal to 3 percent, the content of undissolved substances of hydrochloric acid is more than or equal to 95 percent, the content of silicon is more than or equal to 60 percent, and the percent represents the weight percentage; the antioxidant is one or more than two of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010), tris (2, 4-di-tert-butyl) phosphite (antioxidant 168), thiodipropionate stearate (DSTP), dilauryl thiodipropionate (DLTP) and 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid (antioxidant 3114).
The polypropylene modified sound insulation material layer 3 is prepared by the following method:
(1) mixing polypropylene, a coupling agent, a heat stabilizer, a lubricant, an antioxidant and white oil according to the weight parts, heating to 213 ℃, and keeping for five minutes;
(2) mixing the magnesium oxide, the zinc oxide and the talcum powder according to the weight parts, heating to 218 ℃, and keeping for five minutes;
(3) extruding, cooling and drying by a double-screw extruder;
(4) and heating the polypropylene modified sound insulation material to 190 ℃ and banburying and molding under the pressure of 83 MPa.
Example 3: a sound insulation structure installed on a front wall plate of an automobile is installed on one side, close to a cab, of a front wall plate 1 and comprises a cavity plate 4, wherein the cavity plate 4 is installed on the front wall plate 1, and a sealed cavity is formed between the cavity plate 4 and the front wall plate 1; a sound insulation board is arranged in the cavity, and a polyurethane foam filling agent 2 is filled between the sound insulation board and the inner wall of the cavity; the sound insulation board consists of a first moisture-proof layer, a polypropylene modified sound insulation material layer 3 and a second moisture-proof layer which are sequentially attached; the first moisture barrier and the second moisture barrier are both polypropylene films.
The polypropylene modified sound insulation material layer 3 is composed of the following raw materials in parts by weight: 87 parts of polypropylene, 11 parts of talcum powder, 0.2 part of coupling agent, 0.9 part of heat stabilizer, 0.4 part of lubricant, 0.5 part of white oil, 1.2 parts of antioxidant, 33 parts of zinc oxide and 16 parts of magnesium oxide.
The performance indexes of the talc powder are as follows: the loss on ignition at 750 ℃ is less than or equal to 3 percent, the content of undissolved substances of hydrochloric acid is more than or equal to 95 percent, the content of silicon is more than or equal to 60 percent, and the percent represents the weight percentage; the antioxidant is one or more than two of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010), tris (2, 4-di-tert-butyl) phosphite (antioxidant 168), thiodipropionate stearate (DSTP), dilauryl thiodipropionate (DLTP) and 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid (antioxidant 3114).
The polypropylene modified sound insulation material layer 3 is prepared by the following method:
(1) mixing polypropylene, a coupling agent, a heat stabilizer, a lubricant, an antioxidant and white oil according to the weight parts, heating to 200 ℃, and keeping for five minutes;
(2) mixing the magnesium oxide, the zinc oxide and the talcum powder according to the weight parts, heating to 210 ℃, and keeping for five minutes;
(3) extruding, cooling and drying by a double-screw extruder;
(4) and heating the polypropylene modified sound insulation material to 185 ℃, and banburying and molding under the pressure of 49 MPa.
The double-screw extruder adopts a 65B type double-screw extruder unit, and the length-diameter ratio is as follows: 40:1, controlling the temperature of cooling water in a water-cooling brace granulation process at 50-60 ℃, and cooling length: and cooling the whole water tank length. Storing the granulated product in a storage bin for 2 hours, and naturally cooling; directly injection-molding into a sample plate and a standard sample strip by using an injection molding machine, processing at 23 +/-2 ℃ and 50% humidity in a standard environment for 48h, and then testing. After the product is cooled for 4 hours in a natural state, a moisture tester with the moisture content of 1 per mill g is used for testing the moisture content.
The results of the physical property tests (taking the average of the results of the tests on the finished products of the three preceding examples) are shown in the following table:
the experiment is the result of random spot check for producing PPT3010 tons, and the original process is the sample detection result of each batch of original products.
Moisture test results:
| number of tests | For the first time | For the second time | The third time |
| Test results | 0.32‰ | 0.31‰ | 0.33‰ |
The sound-insulating front wall panel commonly available in the market and the front wall panel of example 3 were compared for experimental analysis, and the comparison results are shown in fig. 2. The antetheca plate structure performance of this patent is leading in current antetheca board comprehensively. Particularly, after the frequency is higher than 3000, the sound insulation performance of the front wall plate structure exceeds the existing sound insulation performance of more than 51%, the above effects can be obtained, on one hand, the cavity plate is added, and the cavity is filled with polyurethane foam filling agent; most importantly, the polypropylene modified sound insulation material layer manufactured by adopting a special process is adopted.
Claims (4)
1. A sound insulation structure arranged on a front wall plate of an automobile is characterized in that the sound insulation structure is arranged on one side, close to a cab, of a front wall plate (1) and comprises a cavity plate (4), the cavity plate (4) is arranged on the front wall plate (1), and a sealed cavity is arranged between the cavity plate (4) and the front wall plate (1); a sound insulation board is arranged in the cavity, and a polyurethane foam filling agent (2) is filled between the sound insulation board and the inner wall of the cavity; the sound insulation board consists of a first moisture-proof layer, a polypropylene modified sound insulation material layer (3) and a second moisture-proof layer which are sequentially attached;
the polypropylene modified sound insulation material layer (3) is composed of the following raw materials in parts by weight: 85-90 parts of polypropylene, 10-12 parts of talcum powder, 0.1-0.3 part of coupling agent, 0.3-1.2 parts of heat stabilizer, 0.2-0.5 part of lubricant, 0.3-0.7 part of white oil, 1.1-1.3 parts of antioxidant, 30-35 parts of zinc oxide and 11-21 parts of magnesium oxide.
2. A sound-insulating structure for mounting on a front wall panel of an automobile as claimed in claim 1, wherein said first and second moisture barriers are polypropylene films.
3. The sound insulating structure mounted on a front wall panel of an automobile according to claim 1, wherein said talc powder has the following performance criteria: the loss on ignition at 750 ℃ is less than or equal to 3 percent, the content of undissolved substances of hydrochloric acid is more than or equal to 95 percent, the content of silicon is more than or equal to 60 percent, and the percent represents the weight percentage; the antioxidant is one or more than two of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010), tris (2, 4-di-tert-butyl) phosphite (antioxidant 168), thiodipropionate stearate (DSTP), dilauryl thiodipropionate (DLTP) and 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid (antioxidant 3114).
4. An acoustic insulation structure mounted on a front wall panel of an automobile according to claim 1, wherein the polypropylene modified acoustic insulation material layer (3) is prepared by the following method:
(1) mixing polypropylene, a coupling agent, a heat stabilizer, a lubricant, an antioxidant and white oil according to the weight parts, heating to 198 +/-15 ℃, and keeping for five minutes;
(2) mixing the magnesium oxide, the zinc oxide and the talcum powder according to the weight parts, heating to 203 +/-15 ℃, and keeping for five minutes;
(3) extruding, cooling and drying by a double-screw extruder;
(4) and heating the polypropylene modified sound insulation material to 175 +/-15 ℃ and banburying and molding under the pressure of 47 +/-5 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910933470.6A CN110588535A (en) | 2019-09-29 | 2019-09-29 | Install sound insulation construction at automobile front wall board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910933470.6A CN110588535A (en) | 2019-09-29 | 2019-09-29 | Install sound insulation construction at automobile front wall board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
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|---|---|---|---|---|
| JPH1120572A (en) * | 1997-07-01 | 1999-01-26 | Nippon Tokushu Toryo Co Ltd | Soundproof material for vehicle room of automobile |
| CN103774833A (en) * | 2014-01-23 | 2014-05-07 | 浙江润阳新材料科技有限公司 | Soundproof floor mat |
| US20160002495A1 (en) * | 2014-07-07 | 2016-01-07 | Daehan Solution Co., Ltd | Polyurethane sound-insulating composition and method of manufacturing sound-absorbing and insulating material for vehicles using the same |
| CN205344768U (en) * | 2016-01-30 | 2016-06-29 | 重庆长安汽车股份有限公司 | Wallboard gives sound insulation and fills up structure before automobile |
| CN108891106A (en) * | 2018-06-08 | 2018-11-27 | 昆山同昌汽车新材料有限公司 | A kind of structure and manufacturing process of sound insulating and absorbing front wall |
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2019
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| JPH1120572A (en) * | 1997-07-01 | 1999-01-26 | Nippon Tokushu Toryo Co Ltd | Soundproof material for vehicle room of automobile |
| CN103774833A (en) * | 2014-01-23 | 2014-05-07 | 浙江润阳新材料科技有限公司 | Soundproof floor mat |
| US20160002495A1 (en) * | 2014-07-07 | 2016-01-07 | Daehan Solution Co., Ltd | Polyurethane sound-insulating composition and method of manufacturing sound-absorbing and insulating material for vehicles using the same |
| CN205344768U (en) * | 2016-01-30 | 2016-06-29 | 重庆长安汽车股份有限公司 | Wallboard gives sound insulation and fills up structure before automobile |
| CN108891106A (en) * | 2018-06-08 | 2018-11-27 | 昆山同昌汽车新材料有限公司 | A kind of structure and manufacturing process of sound insulating and absorbing front wall |
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Application publication date: 20191220 |