CN115320510A - Enclose thermal-insulated sound insulation pad before auttombilism room based on macromolecular material - Google Patents
Enclose thermal-insulated sound insulation pad before auttombilism room based on macromolecular material Download PDFInfo
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- CN115320510A CN115320510A CN202210992718.8A CN202210992718A CN115320510A CN 115320510 A CN115320510 A CN 115320510A CN 202210992718 A CN202210992718 A CN 202210992718A CN 115320510 A CN115320510 A CN 115320510A
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- 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
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- 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
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- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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Abstract
The invention discloses a high polymer material-based front wall heat and sound insulation pad for an automobile cab, and relates to the technical field of automobile part manufacturing. The heat and sound insulation pad provided by the invention takes the high polymer material as a main raw material, and simultaneously optimizes the internal structure of the heat and sound insulation pad, so that the heat and sound insulation pad can be well adapted to the front walls of the cabs of automobiles with different models, has the characteristics of high heat and sound insulation effect, light weight and shock resistance, and can be well applied to the field of new energy automobiles.
Description
Technical Field
The invention relates to the technical field of automobile part manufacturing, in particular to a high polymer material-based front wall heat and sound insulation pad for an automobile cab.
Background
The polymer material is an artificial synthetic material with large molecular weight, the plastic, the synthetic rubber and the synthetic fiber are the most main polymer synthetic materials, and the polymer material has light texture, abundant raw materials, convenient processing, good performance and wide application, so the development speed at the present stage has surpassed three traditional basic materials of steel, wood and cement.
With the continuous development of automobiles, the new energy automobiles realize the conversion of automobiles from traditional fossil fuels to unconventional automobile fuels at present, and although the new energy automobiles adopt advanced technologies in the aspect of power sources and replace traditional engine devices to a certain extent, most of new energy automobiles still adopt traditional metal materials for body materials and the like. The metal material has heavy vehicle body weight, high loss can be generated on a power source of the new energy vehicle, and the metal material has poor heat and sound insulation performance.
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 a front wall upper cover plate. 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. Therefore, the arrangement of the front wall plate structure is particularly important for the automobile, and the good heat and sound insulation function has a great influence on the new energy automobile, and the structural design and material selection of the front wall plate in the existing new energy automobile need to be improved and optimized.
Disclosure of Invention
In order to solve the problems, the invention provides a high polymer material-based front wall heat and sound insulation pad for an automobile cab.
The technical scheme of the invention is as follows:
a high polymer material-based automobile cab front wall heat and sound insulation pad comprises a heat insulation reinforcing plate, a sound insulation reinforcing plate and a honeycomb plate, wherein the heat insulation reinforcing plate is fixedly connected with a front wall plate of an automobile cab in an attaching mode, the sound insulation reinforcing plate is located on one side where an automobile engine is located, the honeycomb plate is located between the heat insulation reinforcing plate and the sound insulation reinforcing plate and used for connecting the heat insulation reinforcing plate and the sound insulation reinforcing plate, and two sides of the honeycomb plate are connected with the heat insulation reinforcing plate and the sound insulation reinforcing plate in a hot melting mode through a cementing agent;
the honeycomb plate comprises a plurality of small honeycomb holes which are mutually attached and have regular hexagonal cross sections, and a plurality of large honeycomb holes which are arranged among the small honeycomb holes in an inserting manner and are arranged at equal intervals, the interval between two adjacent large honeycomb holes in the vertical direction is the distance between 5 and 6 rows of small honeycomb holes, and the interval between two adjacent large honeycomb holes in the horizontal direction is the distance between 7 and 9 rows of small honeycomb holes;
the cross sections of any positions in the small honeycomb holes are the same in size, a transition section is arranged in the large honeycomb hole, one side of the transition section, which is close to the heat insulation reinforcing plate, is an expanding section, one side of the transition section, which is close to the sound insulation reinforcing plate, is a reducing section, the cross section of the expanding section is the sum of the areas of 7 small honeycomb holes, the cross section of the expanding section is in a peripheral shape formed by surrounding 1 small honeycomb hole by 6 small honeycomb holes, the reducing section extends to the sound insulation reinforcing plate, the cross section of the reducing section is the same as that of the small honeycomb holes, through holes are arranged at positions, corresponding to the reducing sections, on the sound insulation reinforcing plate, and the cross section of each through hole is in an inscribed circle of the reducing section corresponding to the through hole;
and a spiral noise reduction blade is arranged in the diameter expansion section in each large honeycomb hole.
Further, the cement is a polyamic acid ester cement.
Description of the drawings: the high-temperature-resistant cementing agent is selected to achieve a good cementing effect, so that the heat-insulating and sound-insulating pad is good in firmness and free of cracking at high temperature.
Further, the heat insulation reinforcing plate is obtained by mixing silica aerogel, polytetrafluoroethylene and glass fiber in a solvent, and then carrying out stirring, filtering, drying, compacting and high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 2-4 times of the total mass of the silica aerogel, the glass fiber and the polytetrafluoroethylene, and the content of the silica aerogel, the glass fiber and the polytetrafluoroethylene is as follows by mass percent: 16-20%: 3-5%: the balance, the stirring speed is 1000-1200 r/min, the compaction pressure is 8-12 MPa, the temperature of the high-temperature heat treatment is 350-380 ℃, the temperature rising speed is 1-2 ℃/min, and the time of the high-temperature heat treatment is 20-30 min.
Description of the drawings: through selecting for use macromolecular material polytetrafluoroethylene can creep and can compound with silica aerogel well under the high temperature, make polytetrafluoroethylene fill in silica aerogel's space, improve the compound effect to make the density of material further increase through introducing glass fiber, improved the heat-resisting effect of thermal-insulated reinforcing plate.
Furthermore, the honeycomb plate is made of aluminum silicate.
Description of the drawings: the quality of the honeycomb plate can be effectively reduced by selecting aluminum silicate as the material of the honeycomb plate.
Furthermore, the sound insulation reinforcing plate is made of polypropylene fibrilia plates.
Description of the drawings: by selecting the high polymer material polypropylene fibrilia plate as the material of the sound insulation reinforcing plate, the sound insulation effect is ensured, meanwhile, the sound insulation reinforcing plate can be well matched with the honeycomb plate, and the weight is light and meets the energy-saving characteristic of a new energy automobile.
Furthermore, the thickness of the heat insulation reinforcing plate is 3X, the thickness of the honeycomb plate is 7X, the length of the expanding section is 4X, the length of the transition section is 1X, the length of the reducing section is 2X, the thickness of the sound insulation reinforcing plate is 2X, the radius of the through hole is 0.5-0.8X, and the length represented by X is 10-12 mm.
Description of the invention: thickness and length through each structure in to thermal-insulated puigging fill have been injectd, make length or thickness between each structure form mutual corresponding relation to reach optimum result of use, can choose the structure size of different specifications for use according to the difference of automobile model size, improved resource utilization, guaranteed thermal-insulated puigging fill's the thermal-insulated effect that gives sound insulation simultaneously.
Furthermore, one end of the spiral noise reduction blade is fixedly connected with the heat insulation reinforcing plate through a fixing rod arranged in the middle of the spiral noise reduction blade, the other end of the spiral noise reduction blade extends into the transition section, the radius of the spiral noise reduction blade is 0.3-0.4X, the pitch of the spiral noise reduction blade is 0.2-0.3X, and the spiral noise reduction blade is made of epoxy resin.
Description of the drawings: the length of the blade manufactured by the propeller is limited, so that the length of the helical noise reduction blade corresponds to the length of the large honeycomb hole, and the use requirement is met.
Furthermore, a plurality of reinforcing beams are arranged in the honeycomb plate at equal intervals in the horizontal direction, 4-5 rows of large honeycomb holes are arranged between every two adjacent reinforcing beams, the reinforcing beams are made of copper-aluminum alloy, and the outer walls of the small honeycomb holes or the large honeycomb holes in the honeycomb plate are welded with the reinforcing beams.
Description of the invention: can be according to the different structures of bounding wall before the different cars through setting up of reinforcement roof beam, select to install the reinforcement roof beam in appropriate position, the controllability is high, and has guaranteed thermal-insulated sound insulation pad's quality intensity.
Further, equal circumference of changeover portion and undergauge section outer wall is equidistant to be equipped with a plurality of groups of energy-absorbing strengthening rib group, energy-absorbing strengthening rib group rather than corresponding small-size honeycomb holes outer wall fixed connection, every energy-absorbing strengthening rib group of group and rather than adjacent a set of energy-absorbing strengthening rib group rotate the angle of skew on the horizontal direction for Y, and the group number of energy-absorbing strengthening rib group is an, and Y × a =360, and each energy-absorbing strengthening rib equidistant setting in every energy-absorbing strengthening rib group of group is close to the undergauge section outer wall of noise insulation reinforcing plate one side is equipped with the energy-absorbing reinforcing plate, it has the bradyseism material to fill between energy-absorbing reinforcing plate and the noise insulation reinforcing plate, the material of bradyseism material is rubber, the material of energy-absorbing strengthening rib and energy-absorbing reinforcing plate is copper-aluminum alloy.
Description of the drawings: through setting up energy-absorbing strengthening rib and energy-absorbing reinforcing plate can ensure that thermal-insulated sound insulating pad can not take place deformation in axial and footpath when receiving slight striking or vibrations, selects the not enough problem of intensity that has compensatied macromolecular material through the material of copper-aluminum alloy.
The invention has the beneficial effects that:
(1) The heat and sound insulation pad provided by the invention takes the high polymer material as a main raw material, and simultaneously optimizes the internal structure of the heat and sound insulation pad, so that the heat and sound insulation pad can be well adapted to the front walls of the cabs of automobiles with different models, has the characteristics of high heat and sound insulation effect, light weight and shock resistance, and can be well applied to the field of new energy automobiles.
(2) According to the heat-insulating and sound-insulating pad, the polytetrafluoroethylene which is a high polymer material is selected in the heat-insulating and sound-insulating reinforcing layer, the polytetrafluoroethylene can creep at high temperature and can be well compounded with the silicon dioxide aerogel, so that the polytetrafluoroethylene is filled in gaps of the silicon dioxide aerogel, the combination effect is improved, the density of the material is further increased by introducing the glass fiber, and the heat-resisting effect of the heat-insulating and sound-insulating reinforcing plate is improved.
(3) According to the heat and sound insulation pad, the aluminum silicate is selected as the material of the honeycomb plate, so that the quality of the honeycomb plate can be effectively reduced, the large honeycomb holes which are arranged among the small honeycomb holes at equal intervals are inserted into the honeycomb plate, the spiral noise reduction blades are arranged in the diameter expansion sections inside the large honeycomb holes, the noise reduction effect can be further improved, the high polymer material polypropylene fibrilia plate is selected as the material of the sound insulation reinforcing plate, so that the heat and sound insulation pad can be well matched with the honeycomb plate while the sound insulation effect is ensured, and the light quality of the heat and sound insulation pad accords with the energy-saving characteristic of a new energy automobile.
(4) The heat and sound insulation pad of the invention limits the thickness and the length of each structure in the heat and sound insulation pad, so that the length or the thickness of each structure forms a mutual corresponding relationship, thereby achieving the optimal use effect, the structure sizes with different specifications can be selected according to the difference of the automobile model size, the resource utilization rate is improved, the sound and heat insulation effect of the heat and sound insulation pad is ensured, the length of the spiral noise reduction blade corresponds to the length of the large honeycomb hole by limiting the length of the spiral propeller manufacturing blade, and the use requirement is met.
(5) According to the heat and sound insulation pad, the reinforcing beam can be installed at a proper position according to different structures of front panels of different automobiles through the arrangement of the reinforcing beam, the adjustability is high, the quality strength of the heat and sound insulation pad is ensured, the heat and sound insulation pad can be ensured not to deform in the axial direction and the radial direction when being slightly impacted or vibrated by arranging the energy absorption reinforcing ribs and the energy absorption reinforcing plates, and the problem of insufficient strength of a high polymer material is solved through the selection of the copper-aluminum alloy material.
Drawings
FIG. 1 is a schematic view of the overall structure of the thermal and acoustical insulation pad of the present invention;
FIG. 2 is a schematic view of the structure of the heat and sound insulating pad honeycomb panel and reinforcing beam of the present invention;
FIG. 3 is a side view of the honeycomb plate of the thermal and acoustical insulation mat of the present invention and a schematic view of the internal structure of the small-sized honeycomb holes and the large-sized honeycomb holes;
FIG. 4 is a schematic view of the distribution structure of energy-absorbing reinforcing rib components of the thermal and acoustical insulation pad of the present invention;
FIG. 5 is a schematic view of an energy absorbing reinforcement plate structure of the thermal and acoustical insulating pad of the present invention.
The energy-absorbing and energy-reducing composite material comprises 1-a heat-insulating reinforcing plate, 2-a sound-insulating reinforcing plate, 21-a through hole, 3-a honeycomb plate, 4-a small honeycomb hole, 5-a large honeycomb hole, 51-an expanding section, 52-a transition section, 53-a reducing section, 6-a spiral noise-reducing blade, 61-a fixing rod, 7-a reinforcing beam, 8-an energy-absorbing reinforcing rib group and 9-an energy-absorbing reinforcing plate.
Detailed Description
Example 1
As shown in fig. 1, a front wall heat and sound insulation pad for an automobile cab based on a high polymer material comprises a heat insulation reinforcing plate 1 which is fixedly connected with the front wall plate of the automobile cab in an attaching manner, a sound insulation reinforcing plate 2 which is positioned on one side where an automobile engine is positioned, and a honeycomb plate 3 which is positioned between the heat insulation reinforcing plate 1 and the sound insulation reinforcing plate 2 and is used for connecting the heat insulation reinforcing plate 1 and the sound insulation reinforcing plate 2, wherein two sides of the honeycomb plate 3 are connected with the heat insulation reinforcing plate 1 and the sound insulation reinforcing plate 2 in a hot melting manner through a cementing agent which is a polyamide acid ester cementing agent;
the heat insulation reinforcing plate 1 is obtained by mixing silica aerogel, polytetrafluoroethylene and glass fiber in a solvent, and then carrying out stirring, filtering, drying, compacting and high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 3 times of the total mass of the silica aerogel, the glass fiber and the polytetrafluoroethylene, and the component contents of the silica aerogel, the glass fiber and the polytetrafluoroethylene are as follows by mass percent: 18%:4%: the rest, the stirring speed is 1100r/min, the compacting pressure is 10MPa, the high-temperature heat treatment temperature is 360 ℃, the heating rate is 1.5 ℃/min, the high-temperature heat treatment time is 25min, and the sound insulation reinforcing plate 2 is made of a polypropylene fibrilia plate;
as shown in fig. 2, the honeycomb panel 3 includes a plurality of small honeycomb holes 4 which are mutually attached and have a regular hexagonal cross section, and a plurality of large honeycomb holes 5 which are arranged between the small honeycomb holes 4 and are arranged at equal intervals, the interval between two adjacent large honeycomb holes 5 in the vertical direction is the distance between 5 rows of small honeycomb holes 4, the interval between two adjacent large honeycomb holes 5 in the horizontal direction is the distance between 7 rows of small honeycomb holes 4, the material of the honeycomb panel 3 is aluminum silicate, a plurality of reinforcing beams 7 are arranged in the honeycomb panel 3 at equal intervals in the horizontal direction, 4 rows of large honeycomb holes 5 are arranged between two adjacent reinforcing beams 7, the material of the reinforcing beams 7 is copper-aluminum alloy, and the outer walls of the small honeycomb holes 4 or the outer walls of the large honeycomb holes 5 in the honeycomb panel 3 are welded with the reinforcing beams 7;
as shown in fig. 3-5, the cross-sectional area of any position inside the small honeycomb holes 4 is the same, the transition section 52 is arranged inside the large honeycomb hole 5, the side of the transition section 52 close to the heat insulation reinforcing plate 1 is an expanding section 51, the side of the transition section 52 close to the sound insulation reinforcing plate 2 is a reducing section 53, the cross-sectional area of the expanding section 51 is the sum of the areas of 7 small honeycomb holes 4, the cross-sectional area of the expanding section 51 is the peripheral shape formed by surrounding 1 small honeycomb hole 4 by 6 small honeycomb holes 4, the reducing section 53 extends to the sound insulation reinforcing plate 2, the cross-sectional area of the reducing section 53 is the same as that of the small honeycomb hole 4, the sound insulation reinforcing plate 2 is provided with through holes 21 at the position corresponding to each reducing section 53, the cross-sectional shape of the through hole 21 is the inscribed circle of the reducing section 53 corresponding to the through hole 21, 3 groups of energy-absorbing reinforcing rib groups 8 are circumferentially arranged on the outer walls of the transition section 52 and the reducing section 53 at equal intervals, the energy-absorbing reinforcing rib groups 8 are fixedly connected with the outer walls of the corresponding small honeycomb holes 4, the rotating offset angle of each group of energy-absorbing reinforcing rib groups 8 and the adjacent group of energy-absorbing reinforcing rib groups 8 in the horizontal direction is Y, the number of the energy-absorbing reinforcing rib groups 8 is a, YXa =360 degrees, each energy-absorbing reinforcing rib in each group of energy-absorbing reinforcing rib groups 8 is arranged at equal intervals, the outer wall of the reducing section 53 close to one side of the sound-insulating reinforcing plate 2 is provided with an energy-absorbing reinforcing plate 9, a shock-absorbing material is filled between the energy-absorbing reinforcing plate 9 and the sound-insulating reinforcing plate 2, the shock-absorbing material is made of rubber, and the energy-absorbing reinforcing ribs and the energy-absorbing reinforcing plate 9 are made of copper-aluminum alloy;
as shown in fig. 3, the thickness of the heat-insulating reinforcing plate 1 is 3X, the thickness of the honeycomb plate 3 is 7X, the length of the diameter-expanded section 51 is 4X, the length of the transition section 52 is 1X, the length of the diameter-reduced section 53 is 2X, the thickness of the sound-insulating reinforcing plate 2 is 2X, and the radius of the through-hole 21 is 0.6X, and the length represented by X is 11mm;
as shown in fig. 3, a spiral noise reduction blade 6 is arranged in an expanding section 51 inside each large honeycomb hole 5, one end of the spiral noise reduction blade 6 is fixedly connected with the heat insulation reinforcing plate 1 through a fixing rod 61 arranged in the middle of the spiral noise reduction blade 6, the other end of the spiral noise reduction blade 6 extends into a transition section 52, the radius of the spiral noise reduction blade 6 is 0.35X, the pitch of the spiral noise reduction blade 6 is 0.25X, and the material of the spiral noise reduction blade 6 is epoxy resin.
Example 2
The present embodiment is different from embodiment 1 in that: the parameters of the insulating and reinforcing panel 1 are different.
The heat insulation reinforcing plate 1 is obtained by mixing silica aerogel, polytetrafluoroethylene and glass fiber in a solvent, then stirring, filtering, drying, compacting and performing high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 2 times of the mass sum of the silica aerogel, the glass fiber and the polytetrafluoroethylene, and the content of the silica aerogel, the glass fiber and the polytetrafluoroethylene is as follows by mass percent: 16%:3%: the balance, the stirring speed is 1000r/min, the compaction pressure is 8MPa, the high-temperature heat treatment temperature is 350 ℃, the heating speed is 1 ℃/min, the high-temperature heat treatment time is 20min, and the sound insulation reinforcing plate 2 is made of polypropylene fibrilia.
Example 3
The present embodiment is different from embodiment 1 in that: the parameters of the insulating and reinforcing panel 1 are different.
The heat insulation reinforcing plate 1 is obtained by mixing silica aerogel, polytetrafluoroethylene and glass fiber in a solvent, and then stirring, filtering, drying, compacting and performing high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 4 times of the total mass of the silica aerogel, the glass fiber and the polytetrafluoroethylene, and the component contents of the silica aerogel, the glass fiber and the polytetrafluoroethylene are as follows by mass percent: 20%:5%: the balance, the stirring speed is 1200r/min, the compacting pressure is 12MPa, the high-temperature heat treatment temperature is 380 ℃, the heating speed is 2 ℃/min, the high-temperature heat treatment time is 30min, and the sound insulation reinforcing plate 2 is made of polypropylene fibrilia.
Example 4
The present embodiment is different from embodiment 1 in that: the honeycomb panel 3 has a different internal structure.
The cross sectional shape that honeycomb panel 3 includes that a plurality of laminates each other is regular hexagon's small-size honeycomb holes 4, and alternate and set up between small-size honeycomb holes 4 and the large-size honeycomb holes 5 of a plurality of equidistant range, two adjacent large-size honeycomb holes 5's interval is 6 rows of small-size honeycomb holes 4's distance on the vertical direction, two adjacent large-size honeycomb holes 5's interval is 8 rows of small-size honeycomb holes 4's distance on the horizontal direction, honeycomb panel 3's material is the aluminium silicate, honeycomb panel 3 is inside is equipped with a plurality of strengthening beams 7 at the equidistant distance in the horizontal direction, be equipped with 4 rows of large-size honeycomb holes 5 between two adjacent strengthening beams 7, strengthening beams 7's material is the copper aluminum alloy, honeycomb panel 3 is inside small-size honeycomb holes 4 outer walls or large-size honeycomb holes 5 outer walls and strengthening beams 7's connected mode and is the welding.
Example 5
The present embodiment is different from embodiment 1 in that: the honeycomb panel 3 has a different internal structure.
The cross sectional shape that honeycomb panel 3 includes that a plurality of laminates each other is regular hexagon's small-size honeycomb holes 4, and alternate and set up between small-size honeycomb holes 4 and the large-size honeycomb holes 5 of a plurality of equidistant range, two adjacent large-size honeycomb holes 5's interval is 6 rows of small-size honeycomb holes 4's distance on the vertical direction, two adjacent large-size honeycomb holes 5's interval is 9 rows of small-size honeycomb holes 4's distance on the horizontal direction, honeycomb panel 3's material is the aluminium silicate, honeycomb panel 3 is inside is equipped with a plurality of strengthening beams 7 at the equidistant horizontal direction, be equipped with 5 rows of large-size honeycomb holes 5 between two adjacent strengthening beams 7, strengthening beams 7's material is the copper aluminum alloy, honeycomb panel 3 is inside small-size honeycomb holes 4 outer wall or large-size honeycomb holes 5 outer walls and strengthening beams 7's connected mode and is the welding.
Example 6
The present embodiment is different from embodiment 1 in that:
as shown in fig. 3, the thickness of the heat insulating reinforcing plate 1 is 3X, the thickness of the honeycomb panel 3 is 7X, the length of the expanded diameter section 51 is 4X, the length of the transition section 52 is 1X, the length of the reduced diameter section 53 is 2X, the thickness of the sound insulating reinforcing plate 2 is 2X, the radius of the through hole 21 is 0.5x, and the length represented by X is 10mm;
as shown in fig. 3, a spiral noise reduction blade 6 is arranged in an expanding section 51 inside each large honeycomb hole 5, one end of the spiral noise reduction blade 6 is fixedly connected with the heat insulation reinforcing plate 1 through a fixing rod 61 arranged in the middle of the spiral noise reduction blade 6, the other end of the spiral noise reduction blade 6 extends into a transition section 52, the radius of the spiral noise reduction blade 6 is 0.3X, the pitch of the spiral noise reduction blade 6 is 0.2X, and the material of the spiral noise reduction blade 6 is epoxy resin.
Example 7
The present embodiment is different from embodiment 1 in that:
as shown in fig. 3, the thickness of the heat-insulating reinforcing plate 1 is 3X, the thickness of the honeycomb panel 3 is 7X, the length of the expanded diameter section 51 is 4X, the length of the transition section 52 is 1X, the length of the reduced diameter section 53 is 2X, the thickness of the sound-insulating reinforcing plate 2 is 2X, the radius of the through-hole 21 is 0.8X, and the length represented by X is 12mm;
as shown in fig. 3, a spiral noise reduction blade 6 is arranged in an expanding section 51 inside each large honeycomb hole 5, one end of the spiral noise reduction blade 6 is fixedly connected with the heat insulation reinforcing plate 1 through a fixing rod 61 arranged in the middle of the spiral noise reduction blade 6, the other end of the spiral noise reduction blade 6 extends into a transition section 52, the radius of the spiral noise reduction blade 6 is 0.4X, the pitch of the spiral noise reduction blade 6 is 0.3X, and the material of the spiral noise reduction blade 6 is epoxy resin.
Experimental example 1
The thermal conductivity of the thermal insulation reinforcing plate 1 in examples 1-3 was counted and compared with that of a conventional polytetrafluoroethylene thermal-resistant plate as comparative example 1, and the comparison results are shown in table 1.
Table 1 thermal conductivity of examples 1-3 and comparative example 1
| Case(s) | Thermal conductivity W/mK |
| Example 1 | 0.12 |
| Example 2 | 0.14 |
| Example 3 | 0.15 |
| Comparative example 1 | 0.29 |
As can be seen from the data in Table 1, the thermal conductivity of the thermal insulation reinforcing plate 1 of the invention is lower than that of the conventional polytetrafluoroethylene thermal-resistant plate, and the thermal-resistant and thermal-insulating effects are better, and further, as can be seen from comparative examples 1-3, the thermal insulation reinforcing plate 1 prepared according to the parameters in example 1 has better thermal-resistant and thermal-insulating effects.
Experimental example 2
The sound absorption and insulation efficiency of the honeycomb panel 3 was counted in examples 1, 4 and 5 and compared with a conventional PET sound absorption panel having the same thickness as comparative example 2, and the comparison results are shown in table 2.
Table 2 examples 1, 4, 5 have a change in sound absorption and insulation compared to comparative example 2
| Case(s) | Change in the sound absorption Rate% | The sound insulation rate is changed% | Change in mass% |
| Example 1 | +12.3 | +8.5 | -2.3 |
| Example 2 | +9.8 | +7.3 | -2.7 |
| Example 3 | +9.0 | +7.1 | -2.6 |
As can be seen from the data in Table 2, the honeycomb panel 3 of the present invention can significantly improve the sound absorption and insulation efficiency by the cross arrangement of the small honeycomb holes 4 and the large honeycomb holes 5 and the arrangement of the internal spiral noise reduction blades 6, and the like, and the sound absorption rate and the sound insulation rate are both improved compared with the comparative example 2, wherein the sound absorption rate is significantly improved because the sound absorption efficiency can be further improved by the arrangement of the internal structure of the large honeycomb holes 5, and the quality in 3 groups of examples is reduced, which meets the requirement of light weight, and the parameters of the honeycomb panel 3 in the example 1 are comprehensively considered.
Claims (9)
1. The front wall heat and sound insulation pad based on the high polymer material for the automobile cab is characterized by comprising a heat insulation reinforcing plate (1) fixedly connected with a front wall plate of the automobile cab in an attaching manner, a sound insulation reinforcing plate (2) located on one side where an automobile engine is located, and a honeycomb plate (3) located between the heat insulation reinforcing plate (1) and the sound insulation reinforcing plate (2) and used for connecting the heat insulation reinforcing plate (1) and the sound insulation reinforcing plate (2), wherein two sides of the honeycomb plate (3) are connected with the heat insulation reinforcing plate (1) and the sound insulation reinforcing plate (2) in a cementing agent hot melting manner;
the honeycomb plate (3) comprises a plurality of small honeycomb holes (4) which are mutually attached and have regular hexagonal cross sections and a plurality of large honeycomb holes (5) which are arranged among the small honeycomb holes (4) in an inserting mode and are arranged at equal intervals, the interval between two adjacent large honeycomb holes (5) in the vertical direction is the distance between 5 rows of small honeycomb holes (4) and 6 rows of small honeycomb holes (4), and the interval between two adjacent large honeycomb holes (5) in the horizontal direction is the distance between 7 rows of small honeycomb holes (4) and 9 rows of small honeycomb holes (4);
the cross-sectional areas of any positions in the small honeycomb holes (4) are the same in size, a transition section (52) is arranged in the large honeycomb hole (5), one side, close to the heat insulation reinforcing plate (1), of the transition section (52) is an expanding section (51), one side, close to the sound insulation reinforcing plate (2), of the transition section (52) is a reducing section (53), the cross-sectional area of the expanding section (51) is the sum of the areas of 7 small honeycomb holes (4), the cross-sectional shape of the expanding section (51) is the peripheral shape formed by surrounding 1 small honeycomb hole (4) by 6 small honeycomb holes (4), the reducing section (53) extends to the sound insulation reinforcing plate (2), the cross-sectional area of the reducing section (53) is the same as that of the small honeycomb hole (4), a through hole (21) is arranged at a position, corresponding to each reducing section (53), on the sound insulation reinforcing plate (2), and the cross-sectional shape of the through hole (21) is an inscribed circle of the reducing section (53) corresponding to the through hole (21);
and a spiral noise reduction blade (6) is arranged in the diameter expansion section (51) in each large honeycomb hole (5).
2. The polymer material-based automotive cab front wall thermal and sound insulation pad as claimed in claim 1, wherein the cement is a polyamide acid ester cement.
3. The front wall heat and sound insulation pad for the automobile cab based on the high polymer material as claimed in claim 1, wherein the heat and sound insulation reinforcement plate (1) is obtained by mixing silica aerogel, polytetrafluoroethylene and glass fiber in a solvent, and then stirring, filtering, drying, compacting and performing high temperature heat treatment, the solvent is absolute ethyl alcohol, the mass of the solvent is 2-4 times of the total mass of the silica aerogel, the glass fiber and the polytetrafluoroethylene, and the content of the silica aerogel, the glass fiber and the polytetrafluoroethylene is as follows by mass percent: 16-20%: 3-5%: the balance, the stirring speed is 1000-1200 r/min, the compaction pressure is 8-12 MPa, the temperature of the high-temperature heat treatment is 350-380 ℃, the temperature rising speed is 1-2 ℃/min, and the time of the high-temperature heat treatment is 20-30 min.
4. The front wall heat and sound insulation pad for the automobile cab based on the high polymer material as claimed in claim 1, wherein the material of the honeycomb plate (3) is aluminum silicate.
5. The high polymer material-based front wall heat and sound insulation pad for the automobile cab is characterized in that the sound insulation reinforcing plate (2) is made of polypropylene fibrilia.
6. The automobile cab front wall thermal and sound insulation pad based on the polymer material as claimed in claim 1, wherein the thermal insulation reinforcing plate (1) has a thickness of 3X, the honeycomb plate (3) has a thickness of 7X, the expanded diameter section (51) has a length of 4X, the transition section (52) has a length of 1X, the reduced diameter section (53) has a length of 2X, the sound insulation reinforcing plate (2) has a thickness of 2X, and the through hole (21) has a radius of 0.5-0.8X, which represents a length of 10-12 mm.
7. The front wall heat and sound insulation pad for the automobile cab based on the high polymer material as claimed in claim 6, wherein one end of the spiral noise reduction blade (6) is fixedly connected with the heat insulation reinforcing plate (1) through a fixing rod (61) arranged in the middle of the spiral noise reduction blade, the other end of the spiral noise reduction blade (6) extends into the transition section (52), the radius of the spiral noise reduction blade (6) is 0.3-0.4X, the pitch of the spiral noise reduction blade (6) is 0.2-0.3X, and the material of the spiral noise reduction blade (6) is epoxy resin.
8. The high polymer material-based automobile cab front wall heat and sound insulation pad as claimed in claim 1, wherein a plurality of reinforcing beams (7) are arranged in the honeycomb plate (3) at equal intervals in the horizontal direction, 4-5 rows of large honeycomb holes (5) are arranged between every two adjacent reinforcing beams (7), the reinforcing beams (7) are made of copper-aluminum alloy, and the outer walls of the small honeycomb holes (4) or the large honeycomb holes (5) in the honeycomb plate (3) are welded with the reinforcing beams (7).
9. The front wall heat and sound insulation pad for the automobile cab based on the high polymer material is characterized in that a plurality of energy-absorbing reinforcing rib groups (8) are circumferentially arranged on the outer walls of the transition section (52) and the reducing section (53) at equal intervals, the energy-absorbing reinforcing rib groups (8) are fixedly connected with the outer walls of the small honeycomb holes (4) corresponding to the energy-absorbing reinforcing rib groups, the angle of rotation and deviation of each energy-absorbing reinforcing rib group (8) and the adjacent energy-absorbing reinforcing rib group (8) in the horizontal direction is Y, the group number of the energy-absorbing reinforcing rib groups (8) is a, yxa =360 degrees, each energy-absorbing reinforcing rib in each energy-absorbing reinforcing rib group (8) is arranged at equal intervals, an energy-absorbing reinforcing plate (9) is arranged on the outer wall of the reducing section (53) close to one side of the sound insulation reinforcing plate (2), a shock absorber is filled between the energy-absorbing reinforcing plate (9) and the sound insulation reinforcing plate (2), the shock absorber is made of rubber, and the energy-absorbing reinforcing rib and the reinforcing plate (9) are made of copper-aluminum alloy.
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| CN202210992718.8A CN115320510B (en) | 2022-08-18 | 2022-08-18 | Automobile cab front wall heat-insulation and sound-insulation pad based on high polymer material |
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| CN202210992718.8A CN115320510B (en) | 2022-08-18 | 2022-08-18 | Automobile cab front wall heat-insulation and sound-insulation pad based on high polymer material |
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| CN116001412A (en) * | 2022-11-23 | 2023-04-25 | 江苏森远汽车部件有限公司 | Method for preparing heat insulation pad of automobile engine based on polymer material |
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| CN115320510B (en) | 2023-09-05 |
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