CN115320510B - Automobile cab front wall heat-insulation and sound-insulation pad based on high polymer material - Google Patents
Automobile cab front wall heat-insulation and sound-insulation pad based on high polymer material Download PDFInfo
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- CN115320510B CN115320510B CN202210992718.8A CN202210992718A CN115320510B CN 115320510 B CN115320510 B CN 115320510B CN 202210992718 A CN202210992718 A CN 202210992718A CN 115320510 B CN115320510 B CN 115320510B
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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
Abstract
The invention discloses a high polymer material-based heat-insulation and sound-insulation pad for a front wall of an automobile cab, which relates to the technical field of manufacture of automobile parts. The heat-insulating sound-insulating pad takes the high polymer material as the main raw material, and simultaneously optimizes the internal structure of the heat-insulating sound-insulating pad, so that the heat-insulating sound-insulating pad can be well adapted to the front wall of cabins of automobiles of different models, has the characteristics of high heat-resisting sound-insulating 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 an automobile cab front wall heat-insulation sound-insulation pad based on a high polymer material.
Background
The polymer material is an artificial synthetic material with large molecular weight, and plastic, synthetic rubber and synthetic fiber are the most main polymer synthetic materials, and the polymer material has light and handy texture, abundant raw materials, convenient processing, good performance and wide application, so the development speed at the present stage has passed through three traditional basic materials of steel, wood and cement.
With the continuous development of automobiles, at present, the new energy automobiles realize the transformation from traditional fossil fuels to unconventional automobile fuels, and most of the new energy automobiles still adopt traditional metal materials such as automobile body materials and the like, although the new energy automobiles adopt advanced technology in the aspect of power sources and replace traditional engine devices to a certain extent. The weight of the vehicle body of the metal material is large, so that higher loss can be generated on the power source of the new energy automobile, and the heat insulation and sound insulation performance of the metal material is poor.
In particular to a front coaming of an automobile cab, which is a partition plate between an engine room and a carriage, is connected with a floor and a front column and is arranged below an upper cover plate of the front coaming. The front panel has many openings for the wires, rods, pipes and wire bundles to pass through, and also cooperates with the mounting positions of the pedals, the square query posts and other parts. Therefore, the arrangement of the dash panel structure is particularly important for automobiles, and the good heat and sound insulation function has great influence on new energy automobiles, and the structural design and material selection of the dash panel in the existing new energy automobiles also need to be improved and optimized.
Disclosure of Invention
Aiming at the problems, the invention provides an automobile cab front wall heat and sound insulation pad based on a high polymer material.
The technical scheme of the invention is as follows:
the heat-insulating and sound-insulating pad comprises a heat-insulating reinforcing plate, a sound-insulating reinforcing plate and a honeycomb plate, wherein the heat-insulating reinforcing plate is fixedly connected with a front coaming of the automobile cab, the sound-insulating reinforcing plate is positioned on one side of an automobile engine, the honeycomb plate is positioned between the heat-insulating reinforcing plate and the sound-insulating reinforcing plate and is used for connecting the heat-insulating reinforcing plate and the sound-insulating reinforcing plate, and two sides of the honeycomb plate are connected with the heat-insulating reinforcing plate and the sound-insulating reinforcing plate in a cementing agent hot melting mode;
the honeycomb plate comprises a plurality of small honeycomb holes with regular hexagons in cross section, and a plurality of large honeycomb holes which are arranged between the small honeycomb holes in an inserted mode and are arranged at equal intervals, wherein the distance between two adjacent large honeycomb holes in the vertical direction is the distance between 5-6 rows of small honeycomb holes, and the distance between two adjacent large honeycomb holes in the horizontal direction is the distance between 7-9 rows of small honeycomb holes;
the cross section of any position in the small honeycomb holes is uniform in size, a transition section is arranged in the large honeycomb holes, one side, close to the heat insulation reinforcing plate, of the transition section is an expanded diameter section, one side, close to the sound insulation reinforcing plate, of the transition section is a reduced diameter section, the cross section of the expanded diameter section is the sum of the areas of 7 small honeycomb holes, the cross section of the expanded diameter section is the peripheral shape formed by surrounding 1 small honeycomb hole by 6 small honeycomb holes, the reduced diameter section extends to the sound insulation reinforcing plate, the cross section of the reduced diameter section is identical to the cross section of the small honeycomb holes, through holes are formed in the positions, corresponding to the reduced diameter sections, of the sound insulation reinforcing plate, and the cross section of each through hole is an inscribed circle of the reduced diameter section corresponding to the through hole;
and a spiral noise reduction blade is arranged in the diameter expansion section inside each large honeycomb hole.
Further, the binder is a polyamic acid ester binder.
Description: good cementing effect can be achieved by selecting the cementing agent with high temperature resistance, so that the heat insulation and sound insulation pad is ensured to have good firmness and can not crack at high temperature.
Further, the heat insulation reinforcing plate is obtained by mixing silica aerogel, polytetrafluoroethylene and glass fibers in a solvent, and then stirring, filtering, drying, compacting and carrying out high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 2-4 times of the sum of the mass of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene, and the content of the components of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene are as follows: 16-20%: 3-5%: the balance is that the stirring speed is 1000-1200 r/min, the compacting pressure is 8-12 MPa, the high temperature heat treatment temperature is 350-380 ℃, the heating speed is 1-2 ℃/min, and the high temperature heat treatment time is 20-30 min.
Description: the polytetrafluoroethylene can creep at high temperature and can be well compounded with the silica aerogel by selecting the high polymer material polytetrafluoroethylene, so that the polytetrafluoroethylene is filled in the gaps of the silica aerogel, the bonding effect is improved, the density of the material is further increased by introducing glass fibers, and the heat-resistant effect of the heat-insulating reinforcing plate is improved.
Further, the honeycomb plate is made of aluminum silicate.
Description: the quality of the honeycomb plate can be effectively reduced by selecting aluminum silicate as the material of the honeycomb plate.
Further, the sound insulation reinforcing plate is made of polypropylene fibrilia plates.
Description: the polypropylene fibrilia plate is made of the high polymer material, so that the sound insulation effect is guaranteed, the sound insulation reinforcing plate can be well matched with the honeycomb plate, and the sound insulation reinforcing plate is light in weight and meets the energy saving characteristic of a new energy automobile.
Further, the thickness of the heat insulation reinforcing plate is 3X, the thickness of the honeycomb plate is 7X, the length of the diameter expansion section is 4X, the length of the transition section is 1X, the length of the diameter reduction 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: through limiting the thickness and the length of each structure in the heat and sound insulation pad, the length or the thickness among the structures form a mutual corresponding relation, so that the optimal use effect is achieved, the structure sizes with different specifications can be selected according to the size of the automobile model, the resource utilization rate is improved, and the sound and heat insulation effect of the heat and sound insulation pad is ensured.
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: the length of the propeller blade is limited, so that the length of the propeller noise reduction blade corresponds to the length of the large honeycomb holes, and the use requirement is met.
Further, 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 two adjacent reinforcing beams, the reinforcing beams are made of copper-aluminum alloy, and the outer walls of the small honeycomb holes or the outer walls of the large honeycomb holes in the honeycomb plate are welded with the reinforcing beams.
Description: the reinforcing beam can be installed at a proper position according to different structures of different automobile front surrounding plates through the arrangement of the reinforcing beam, the adjustability is high, and the quality strength of the heat-insulating and sound-insulating pad is guaranteed.
Further, a plurality of groups of energy-absorbing reinforcing rib groups are circumferentially equidistant on the outer walls of the transition section and the reducing section, the energy-absorbing reinforcing rib groups are fixedly connected with the corresponding small honeycomb hole outer walls, the rotation offset angle of each group of energy-absorbing reinforcing rib groups and the adjacent group of energy-absorbing reinforcing rib groups in the horizontal direction is Y, the number of groups of energy-absorbing reinforcing rib groups is a, and Y multiplied by a=360 degrees, each energy-absorbing reinforcing rib in each group of energy-absorbing reinforcing rib groups is arranged at equal intervals, an energy-absorbing reinforcing plate is arranged on the outer wall of the reducing section close to one side of the sound-insulating reinforcing plate, a cushioning material is filled between the energy-absorbing reinforcing plate and the sound-insulating reinforcing plate, the cushioning material is rubber, and the energy-absorbing reinforcing ribs and the energy-absorbing reinforcing plates are all made of copper aluminum alloy.
Description: through setting up energy-absorbing strengthening rib and energy-absorbing reinforcing plate, can ensure that thermal-insulated sound insulation pad can not take place deformation in axial and radial when receiving slight striking or vibrations, through the material selection of copper aluminum alloy, made up the intensity of polymer material not enough problem.
The beneficial effects of the invention are as follows:
(1) The heat-insulating sound-insulating pad takes the high polymer material as the main raw material, and simultaneously optimizes the internal structure of the heat-insulating sound-insulating pad, so that the heat-insulating sound-insulating pad can be well adapted to the front wall of cabins of automobiles of different models, has the characteristics of high heat-resisting sound-insulating effect, light weight and shock resistance, and can be well applied to the field of new energy automobiles.
(2) According to the heat-insulating sound-insulating pad, the high-molecular material polytetrafluoroethylene is selected in the heat-insulating reinforcing layer, so that the heat-insulating sound-insulating pad can creep at high temperature and can be well compounded with the silica aerogel, the polytetrafluoroethylene is filled in the gaps of the silica aerogel, the bonding effect is improved, the density of the material is further increased by introducing glass fibers, and the heat-resisting effect of the heat-insulating reinforcing plate is improved.
(3) According to the heat-insulating sound-insulating pad, aluminum silicate is selected as a material of the honeycomb plate, so that the quality of the honeycomb plate can be effectively reduced, large honeycomb holes which are arranged among small honeycomb holes in an inserted mode and are arranged at equal intervals are formed in the honeycomb plate, spiral noise-reducing blades are arranged in the expanded sections in the large honeycomb holes, the noise-reducing effect can be further improved, and the high-polymer material polypropylene hemp fiber plates are selected as materials of the sound-insulating reinforcing plate, so that the sound-insulating effect is guaranteed, the heat-insulating sound-insulating pad can be well matched with the honeycomb plate, and the heat-insulating sound-insulating pad has lighter quality and meets the energy-saving characteristic of a new energy automobile.
(4) The heat and sound insulation pad provided by the invention has the advantages that the thickness and the length of each structure in the heat and sound insulation pad are limited, so that the lengths or the thicknesses of the structures form a mutual corresponding relation, the optimal use effect is achieved, the structure sizes with different specifications can be selected according to the different sizes of the automobile models, the resource utilization rate is improved, the sound and heat insulation effect of the heat and sound insulation pad is ensured, and the length of the spiral noise reduction blade corresponds to the length of the large honeycomb hole by limiting the length of the propeller blade, so that the heat and sound insulation pad meets the use requirement.
(5) According to the heat-insulating sound-insulating pad, the reinforcing beam can be installed at a proper position according to different structures of different automobile front surrounding plates, the adjustability is high, the mass strength of the heat-insulating sound-insulating pad is guaranteed, the heat-insulating sound-insulating pad can be prevented from deforming in the axial direction and the radial direction when the heat-insulating sound-insulating pad receives slight impact or vibration through the energy-absorbing reinforcing ribs and the energy-absorbing 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 a thermal and sound insulation mat of the present invention;
FIG. 2 is a schematic view of the structure of a honeycomb panel and reinforcing beams of the heat and sound insulation mat of the present invention;
FIG. 3 is a schematic diagram of the side view of the thermal and acoustic insulator mat honeycomb panel of the present invention and the internal structure of the small honeycomb and large honeycomb;
FIG. 4 is a schematic view of the distribution of energy absorbing reinforcement rib components of the thermal and acoustic insulation mat of the present invention;
FIG. 5 is a schematic view of an energy absorbing reinforcement panel structure of a thermal and acoustic insulation mat of the present invention.
The heat-insulating and sound-insulating reinforcing plate comprises a 1-heat-insulating reinforcing plate, a 2-sound-insulating reinforcing plate, 21-through holes, a 3-honeycomb plate, 4-small honeycomb holes, 5-large honeycomb holes, a 51-expanding section, a 52-transition section, a 53-reducing section, 6-spiral noise-reducing blades, 61-fixing rods, 7-reinforcing beams, 8-energy-absorbing reinforcing rib groups and 9-energy-absorbing reinforcing plates.
Detailed Description
Example 1
As shown in fig. 1, the heat and sound insulation pad based on the high polymer material for the front wall of the automobile cab comprises a heat insulation reinforcing plate 1 which is fixedly connected with the front wall plate of the automobile cab, 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 mode through cementing agents, and the cementing agents are polyamide acid ester cementing agents;
the heat insulation reinforcing plate 1 is prepared by mixing silica aerogel, polytetrafluoroethylene and glass fibers in a solvent, stirring, filtering, drying, compacting and carrying out high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 3 times of the sum of the mass of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene, and the content of the components of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene are as follows: 18%:4%: the balance is that the stirring speed is 1100r/min, the compacting pressure is 10MPa, the temperature of high-temperature heat treatment is 360 ℃, the heating speed is 1.5 ℃/min, the time of high-temperature heat treatment is 25min, and the sound insulation reinforcing plate 2 is made of polypropylene fibrilia plates;
as shown in fig. 2, the honeycomb panel 3 includes a plurality of small honeycomb holes 4 with regular hexagons in cross section, and a plurality of large honeycomb holes 5 interposed between the small honeycomb holes 4 and arranged at equal intervals, the distance between two adjacent large honeycomb holes 5 in the vertical direction is the distance between 5 rows of small honeycomb holes 4, the distance between two adjacent large honeycomb holes 5 in the horizontal direction is the distance between 7 rows of small honeycomb holes 4, the honeycomb panel 3 is made of 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 reinforcing beams 7 are made of copper-aluminum alloy, and the outer walls of the small honeycomb holes 4 in the honeycomb panel 3 or the outer walls of the large honeycomb holes 5 are welded with the reinforcing beams 7;
as shown in fig. 3-5, the cross-sectional area of any position in the small honeycomb holes 4 is the same, a transition section 52 is arranged in the large honeycomb holes 5, one side of the transition section 52, which is close to the heat insulation reinforcing plate 1, is an expanded diameter section 51, one side of the transition section 52, which is close to the sound insulation reinforcing plate 2, is a reduced diameter section 53, the cross-sectional area of the expanded diameter section 51 is the sum of the areas of 7 small honeycomb holes 4, the cross-sectional shape of the expanded diameter section 51 is 6 small honeycomb holes 4 surrounding the peripheral shape formed by 1 small honeycomb holes 4, the reduced diameter section 53 extends to the sound insulation reinforcing plate 2, the cross-sectional area of the reduced diameter section 53 is the same as the cross-sectional area of the small honeycomb holes 4, through holes 21 are arranged on the sound insulation reinforcing plate 2 corresponding to the position of each reduced diameter section 53, the cross-sectional shape of the through holes 21 is an inscribed circle of the reduced diameter section 53 corresponding to the through holes 21, 3 groups of reinforcing rib groups 8 are circumferentially arranged on the outer walls of the transition section 52 and the reduced diameter section 53, the outer walls of the energy absorption reinforcing rib groups 8 are fixedly connected with the outer walls of the corresponding small honeycomb holes 4, each group 8 is an energy absorption rubber reinforcing plate with the adjacent groups in the adjacent groups, the energy absorption groups are horizontally offset from the energy absorption groups 8x 9, the energy absorption ribs are arranged in the sound insulation reinforcing plates are arranged in the vibration absorption plate 2, the vibration absorption plate is an equal angle between the groups, and the groups are equal to the vibration absorption plate is equal, the vibration absorption plate is a 9, and the vibration absorption material is filled with the reinforcing ribs and filled with the vibration absorbing materials and filled with the Y and has 3;
as shown in fig. 3, the thickness of the heat insulation reinforcing plate 1 is 3X, the thickness of the honeycomb plate 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 insulation reinforcing plate 2 is 2X, 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 disposed in the expanded 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 disposed in the middle of the spiral noise reduction blade 6, 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 0.35X, the pitch of the spiral noise reduction blade 6 is 0.25X, and the spiral noise reduction blade 6 is made of epoxy resin.
Example 2
This embodiment differs from embodiment 1 in that: the parameters of the insulation reinforcement plate 1 are different.
The heat insulation reinforcing plate 1 is prepared by mixing silica aerogel, polytetrafluoroethylene and glass fibers in a solvent, stirring, filtering, drying, compacting and carrying out high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 2 times of the sum of the mass of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene, and the content of the components of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene are as follows: 16%:3%: the balance is that the stirring speed is 1000r/min, the compacting pressure is 8MPa, the temperature of high-temperature heat treatment is 350 ℃, the heating speed is 1 ℃/min, the time of the high-temperature heat treatment is 20min, and the sound insulation reinforcing plate 2 is made of polypropylene fibrilia plates.
Example 3
This embodiment differs from embodiment 1 in that: the parameters of the insulation reinforcement plate 1 are different.
The heat insulation reinforcing plate 1 is prepared by mixing silica aerogel, polytetrafluoroethylene and glass fibers in a solvent, stirring, filtering, drying, compacting and carrying out high-temperature heat treatment, wherein the solvent is absolute ethyl alcohol, the mass of the solvent is 4 times of the sum of the mass of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene, and the content of the components of the silica aerogel, the mass of the glass fibers and the mass of the polytetrafluoroethylene are as follows: 20%:5%: the balance is that the stirring speed is 1200r/min, the compacting pressure is 12MPa, the temperature of high-temperature heat treatment is 380 ℃, the heating speed is 2 ℃/min, the time of the high-temperature heat treatment is 30min, and the sound insulation reinforcing plate 2 is made of polypropylene fibrilia plates.
Example 4
This embodiment differs from embodiment 1 in that: the honeycomb panel 3 has a different internal structure.
The honeycomb plate 3 comprises a plurality of small honeycomb holes 4 with regular hexagons in cross section, and a plurality of large honeycomb holes 5 which are arranged between the small honeycomb holes 4 in an penetrating manner and are arranged at equal intervals, the distance between two adjacent large honeycomb holes 5 in the vertical direction is the distance between 6 rows of small honeycomb holes 4, the distance between two adjacent large honeycomb holes 5 in the horizontal direction is the distance between 8 rows of small honeycomb holes 4, the material of the honeycomb plate 3 is aluminum silicate, a plurality of reinforcing beams 7 are arranged in the honeycomb plate 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 in the honeycomb plate 3 or the connection mode between the outer walls of the large honeycomb holes 5 and the reinforcing beams 7 are welded.
Example 5
This embodiment differs from embodiment 1 in that: the honeycomb panel 3 has a different internal structure.
The honeycomb plate 3 comprises a plurality of small honeycomb holes 4 with regular hexagons in cross section, and a plurality of large honeycomb holes 5 which are arranged between the small honeycomb holes 4 in an penetrating manner and are arranged at equal intervals, the distance between two adjacent large honeycomb holes 5 in the vertical direction is the distance between 6 rows of small honeycomb holes 4, the distance between two adjacent large honeycomb holes 5 in the horizontal direction is the distance between 9 rows of small honeycomb holes 4, the material of the honeycomb plate 3 is aluminum silicate, a plurality of reinforcing beams 7 are arranged in the honeycomb plate 3 at equal intervals in the horizontal direction, 5 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 in the honeycomb plate 3 or the connection mode between the outer walls of the large honeycomb holes 5 and the reinforcing beams 7 are welded.
Example 6
This embodiment differs from embodiment 1 in that:
as shown in fig. 3, the thickness of the heat insulation reinforcing plate 1 is 3X, the thickness of the honeycomb plate 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 insulation 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 disposed in the expanded 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 disposed in the middle of the spiral noise reduction blade 6, 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 0.3X, the pitch of the spiral noise reduction blade 6 is 0.2X, and the spiral noise reduction blade 6 is made of epoxy resin.
Example 7
This embodiment differs from embodiment 1 in that:
as shown in fig. 3, the thickness of the heat insulation reinforcing plate 1 is 3X, the thickness of the honeycomb plate 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 insulation 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 disposed in the expanded 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 disposed in the middle of the spiral noise reduction blade 6, 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 0.4X, the pitch of the spiral noise reduction blade 6 is 0.3X, and the spiral noise reduction blade 6 is made of epoxy resin.
Experimental example 1
The thermal conductivity of the heat insulation reinforcing plate 1 was counted using examples 1 to 3 as an example and compared with that of a conventional polytetrafluoroethylene heat resistant plate, and the comparison result is shown in table 1 as a comparison example 1.
Table 1 thermal conductivity of examples 1-3 and comparative example 1
| Case (B) | 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 of table 1, the thermal conductivity of the heat insulation reinforcing plate 1 of the present invention is lower than that of the conventional polytetrafluoroethylene heat-resistant plate, and the heat-resistant and heat-insulating effects are better, and further, as can be seen from comparative examples 1 to 3, the heat-resistant and heat-insulating effects of the heat insulation reinforcing plate 1 prepared by the parameters of example 1 are better.
Experimental example 2
The sound absorption and insulation efficiency of the honeycomb panel 3 was counted using examples 1, 4 and 5 as examples, and compared with that of a conventional PET sound absorption panel of the same thickness, and the comparison result is shown in table 2 as comparative example 2.
Table 2 examples 1, 4, 5 show variations in sound absorption and insulation compared to comparative example 2
| Case (B) | Sound absorption rate change% | Sound insulation rate change% | Mass change% |
| 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 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 compared with the comparative example 2, the sound absorption and insulation efficiency are improved, wherein the sound absorption efficiency is improved significantly, 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 the 3 groups of embodiments is reduced, thereby meeting the requirement of light weight, and comprehensively considering the parameters of the honeycomb panel 3 in the embodiment 1.
Claims (6)
1. The heat-insulating and sound-insulating cushion is characterized by comprising a heat-insulating reinforcing plate (1) which is fixedly connected with a front coaming of the automobile cab in a bonding way, a sound-insulating reinforcing plate (2) which is positioned on one side of an automobile engine, and a honeycomb plate (3) which is positioned between the heat-insulating reinforcing plate (1) and the sound-insulating reinforcing plate (2) and is used for connecting the heat-insulating reinforcing plate (1) and the sound-insulating reinforcing plate (2), wherein both sides of the honeycomb plate (3) are connected with the heat-insulating reinforcing plate (1) and the sound-insulating reinforcing plate (2) in a cementing agent hot melting way;
the honeycomb plate (3) comprises a plurality of small honeycomb holes (4) with regular hexagons in cross section, and a plurality of large honeycomb holes (5) which are arranged between the small honeycomb holes (4) in an inserted mode and are arranged at equal intervals, wherein the distance between two adjacent large honeycomb holes (5) in the vertical direction is the distance between 5-6 rows of small honeycomb holes (4), and the distance between two adjacent large honeycomb holes (5) in the horizontal direction is the distance between 7-9 rows of small honeycomb holes (4);
the cross-sectional area of any position inside the small honeycomb holes (4) is the same, a transition section (52) is arranged inside the large honeycomb holes (5), one side, close to the heat insulation reinforcing plate (1), of the transition section (52) is an expanded diameter section (51), one side, close to the sound insulation reinforcing plate (2), of the transition section (52) is a reduced diameter section (53), the cross-sectional area of the expanded diameter section (51) is the sum of the areas of 7 small honeycomb holes (4), the cross-sectional shape of the expanded diameter section (51) is the peripheral shape formed by surrounding 1 small honeycomb hole (4) by 6 small honeycomb holes (4), the reduced diameter section (53) extends to the sound insulation reinforcing plate (2), the cross-sectional area of the reduced diameter section (53) is the same as the cross-sectional area of the small honeycomb holes (4), through holes (21) are formed in positions, corresponding to the reduced diameter sections (53), on the sound insulation reinforcing plate (2), and the cross-sectional shape of the through holes (21) is an inscribed circle, corresponding to the reduced diameter sections (53) of the through holes (21).
A spiral noise reduction blade (6) is arranged in the diameter expansion section (51) in each large honeycomb hole (5);
the thickness of the heat insulation reinforcing plate (1) is 3X, the thickness of the honeycomb plate (3) is 7X, the length of the expanding section (51) is 4X, the length of the transition section (52) is 1X, the length of the reducing section (53) is 2X, the thickness of the sound insulation reinforcing plate (2) is 2X, the radius of the through hole (21) is 0.5-0.8X, and the length represented by X is 10-12 mm;
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 spiral noise reduction blade (6) is made of epoxy resin;
the transition section (52) and the reducing section (53) outer wall all circumference equidistant are equipped with a plurality of groups of energy-absorbing strengthening rib groups (8), energy-absorbing strengthening rib group (8) rather than corresponding small-size honeycomb hole (4) outer wall fixed connection, every group energy-absorbing strengthening rib group (8) and adjacent a set of energy-absorbing strengthening rib group (8) are the angle of rotation skew in the horizontal direction be Y, and the group number of energy-absorbing strengthening rib group (8) is a, and Y x a = 360, each energy-absorbing strengthening rib equidistant setting in every group energy-absorbing strengthening rib group (8), is close to reducing section (53) outer wall of sound insulation reinforcing plate (2) one side is equipped with energy-absorbing reinforcing plate (9), it has the brad material to fill between energy-absorbing reinforcing plate (9) and sound insulation reinforcing plate (2), the material of brad material is rubber, the material of energy-absorbing strengthening rib and energy-absorbing reinforcing plate (9) is the copper aluminum alloy.
2. The polymeric material-based automotive cab front wall heat and sound insulation pad of claim 1, wherein the binder is a polyamic acid ester binder.
3. The heat-insulating and sound-insulating pad for the front wall of the automobile cab based on the high polymer material according to claim 1, wherein the heat-insulating reinforcing plate (1) is prepared by mixing silica aerogel, polytetrafluoroethylene and glass fibers in a solvent, and then stirring, filtering, drying, compacting and carrying out high-temperature heat treatment, the solvent is absolute ethyl alcohol, the mass of the solvent is 2-4 times of the sum of the mass of the silica aerogel, the glass fibers and the polytetrafluoroethylene, and the content of the components of the silica aerogel, the glass fibers and the polytetrafluoroethylene is as follows in percentage by mass: 16-20%: 3-5%: the balance is that the stirring speed is 1000-1200 r/min, the compacting pressure is 8-12 MPa, the high temperature heat treatment temperature is 350-380 ℃, the heating speed is 1-2 ℃/min, and the high temperature heat treatment time is 20-30 min.
4. The heat and sound insulation pad for the front wall of the automobile cab based on the high polymer material according to claim 1, wherein the honeycomb plate (3) is made of aluminum silicate.
5. The heat and sound insulation pad for the front wall of the automobile cab based on the high polymer material according to claim 1, wherein the sound insulation reinforcing plate (2) is made of a polypropylene fibrilia plate.
6. The automobile cab front wall heat and sound insulation pad based on the high polymer material is characterized in that 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 two adjacent reinforcing beams (7), the reinforcing beams (7) are made of copper-aluminum alloy, and the outer walls of small honeycomb holes (4) or the outer walls of the large honeycomb holes (5) in the honeycomb plate (3) are welded with the reinforcing beams (7).
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