Aramid paper honeycomb EMU floor and preparation method thereof

Abstract

The present invention belongs to the technical field of rail passenger car interior decoration, and discloses an aramid paper honeycomb EMU floor and a preparation method thereof. The aramid paper honeycomb EMU floor of the present invention comprises the following raw materials by mass fraction: 25-30% of high-density board skeleton, 8-10% of aramid paper honeycomb, 10-13% of resin glue, 33-37% of carbon fiber cured sheet, and 13-17% of iron embedded block. The present invention also provides a preparation method of the aramid paper honeycomb EMU floor: demoulding paper a, carbon fiber cured sheet a, resin glue a, aramid paper honeycomb, high-density board skeleton, iron embedded block, resin glue b, carbon fiber cured sheet b, demoulding paper b are placed in sequence, mold closing and pressurizing treatment is performed, and then milling treatment is performed to obtain the aramid paper honeycomb EMU floor. The aramid paper honeycomb floor obtained by the present invention has greatly improved tensile strength, compression strength, sound insulation effect and weight reduction effect, is suitable for EMU operation, and has broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of rail passenger car interior decoration, and in particular to an aramid paper honeycomb EMU floor and a preparation method thereof. Background Art

[0002] Traditional train floors generally use plastic floors due to the large number of train sets. The advantages of plastic floors are that they are easy to maintain and lay; but the disadvantages are that their service life is mostly only 3 to 5 years, and they usually need to be produced by specialized floor manufacturers, which is expensive.

[0003] In order to solve the problems of traditional train floors mentioned above, aluminum honeycomb floors and phenolic floors have been used to replace plastic floors in recent years. The structure of aluminum honeycomb floors includes panels, back panels, profiles, reinforcements, core materials and adhesive films. Among them, the panels and back panels are made of 5083-H111 hard aluminum plates, with a panel thickness of 2mm and a back panel thickness of 1mm; the core material is made of 3003-H18 or 5052-H32 aluminum foil, with a grid side length of 3 to 4mm and a thickness of not less than 0.06mm; the frame profile is made of 6063-T5 aluminum alloy, which is firmly connected to ensure that all cavities are closed; the surface is brushed with 80 mesh, along the length of the vehicle, and the brushed surface is uniform. Aluminum honeycomb floors have the advantages of extremely high flatness, uniform force, bending resistance, compression resistance, no combustible substances, high fire rating, dimensional stability and low thermal expansion coefficient, but they also have defects such as poor thermal insulation, easy collapse and fall off, poor repairability and large dead weight.

[0004] At present, there is no floor that can reduce weight and ensure its mechanical properties at home and abroad. Therefore, designing a floor that can reduce its own weight and have excellent mechanical properties has important practical significance and broad application prospects. Summary of the invention

[0005] The object of the present invention is to provide an aramid paper honeycomb EMU floor and a preparation method thereof, so as to solve the problem that the existing floor cannot both reduce its own weight and have excellent mechanical properties.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides an aramid paper honeycomb EMU floor, which is prepared from raw materials containing the following mass fractions:

[0008] High-density board skeleton 25-30%, aramid paper honeycomb 8-10%, resin glue 10-13%, carbon fiber cured sheet 33-37%, iron embedded block 13-17%.

[0009] Furthermore, in the aramid paper honeycomb EMU floor, the high-density board frame is a frame made of high-density fiberboard, the outer frame width of the frame is 45-55 mm, the thickness of the high-density board frame is 15-20 mm, and the density of the high-density board frame is 900-1000 kg / m 3 .

[0010] Furthermore, in the aramid paper honeycomb EMU floor, the thickness of the aramid paper honeycomb is 15 to 20 mm, and the density of the aramid paper honeycomb is 48 kg / m 3 .

[0011] Furthermore, in the aramid paper honeycomb EMU floor, the preparation method of the carbon fiber cured sheet is: placing the release paper, carbon fiber prepreg, and release paper in sequence, performing hot pressing treatment, and obtaining the carbon fiber cured sheet after removing the release paper.

[0012] Furthermore, in the aramid paper honeycomb EMU floor, the type of the carbon fiber prepreg is carbon fiber T300, the number of layers of the carbon fiber prepreg is 3 to 6 layers, the thickness of the carbon fiber cured sheet is 0.9 to 1.4 mm, and the density of the carbon fiber cured sheet is 1200 to 1800 kg / m 3 .

[0013] Furthermore, in the aramid paper honeycomb EMU floor, the temperature of the hot pressing treatment is 130-140° C., the pressure of the hot pressing treatment is 4-54 MPa, and the time of the hot pressing treatment is 50-60 min.

[0014] Furthermore, in the aramid paper honeycomb EMU floor, the resin glue is a two-component epoxy resin glue WSR618.

[0015] Furthermore, in the aramid paper honeycomb EMU floor, it is prepared from raw materials containing the following mass fractions:

[0016] High-density board skeleton 29%, aramid paper honeycomb 9%, resin glue 11%, carbon fiber cured sheet 36%, iron embedded block 15%.

[0017] The present invention also provides a method for preparing an aramid paper honeycomb EMU floor, comprising the following steps:

[0018] The demoulding paper a, the carbon fiber cured sheet a, the resin glue a, the aramid paper honeycomb, the high-density board frame, the iron embedded block, the resin glue b, the carbon fiber cured sheet b, and the demoulding paper b are sequentially placed, and molded and pressurized to obtain a semi-finished floor part; the semi-finished floor part is then processed by CNC milling to obtain a finished aramid paper honeycomb EMU floor;

[0019] The sum of the mass fractions of the carbon fiber cured sheet a and the carbon fiber cured sheet b is 33-37%, and the sum of the mass fractions of the resin glue a and the resin glue b is 10-13%.

[0020] Furthermore, in the method for preparing the aramid paper honeycomb EMU floor, the temperature of the mold closing and pressurizing treatment is 20 to 30° C., the pressure of the mold closing and pressurizing treatment is 1 to 1.5 MPa, and the time of the mold closing and pressurizing treatment is 24 to 30 hours.

[0021] Furthermore, in the method for preparing the aramid paper honeycomb EMU floor, the conditions for the numerical milling process are: the diameter of the cylindrical milling cutter is The cylindrical milling cutter head speed is 9000r / min, the feed speed is 3000mm / min, the processing speed is 5000mm / min, and the retracting speed is 9000mm / min.

[0022] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The aramid paper honeycomb EMU floor provided by the present invention uses aramid paper honeycomb as the main raw material, and carbon fiber, high-density board and resin glue three industrial by-products as auxiliary materials, which are optimized and combined to prepare an aramid paper honeycomb floor. Compared with phenolic floor and aluminum honeycomb floor, the aramid paper honeycomb EMU floor obtained by the present invention has obvious weight reduction and does not affect its mechanical properties;

[0024] (2) The aramid paper honeycomb EMU floor obtained by the present invention breaks through the limitation that the service life of traditional plastic floor is only 3 to 5 years. While meeting the mechanical performance standards of traditional plastic floor, it also achieves the purpose of weight reduction and has repairability, and has broad application prospects;

[0025] (3) The raw materials for preparing the aramid paper honeycomb EMU floor of the present invention are widely available, and the floor is 100% degradable without causing secondary pollution to the environment. It is in line with the low-carbon and environmentally friendly development direction of the railway passenger car industry and has good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below.

[0027] Figure 1 This is a schematic diagram of the structure of the aramid paper honeycomb EMU floor obtained by the present invention.

[0028] In the figure, 1 and 5 are carbon fiber cured sheets, 2 and 4 are resin glue, and 3 is a high-density board skeleton embedded with aramid paper honeycomb;

[0029] Figure 2 This is a schematic diagram of the structure of a high-density board skeleton embedded with aramid paper honeycombs.

[0030] In the figure, 6 is an iron embedded block, 7 is a high-density board frame, and 8 is an aramid paper honeycomb;

[0031] Figure 3 This is a schematic diagram of the three-dimensional model of aramid paper honeycomb;

[0032] Figure 4 It is a schematic diagram when the deflection of the aramid paper honeycomb sandwich is 30 mm;

[0033] Figure 5 It is a schematic diagram when the deflection of the steel plate is 30 mm;

[0034] Figure 6 The performance of a plate with a thickness of t is compared with a plate with a thickness of t and 3t sandwiched with aramid paper honeycombs. DETAILED DESCRIPTION

[0035] The present invention provides an aramid paper honeycomb EMU floor, which is prepared from raw materials containing the following mass fractions:

[0036] High-density board skeleton 25-30%, aramid paper honeycomb 8-10%, resin glue 10-13%, carbon fiber cured sheet 33-37%, iron embedded block 13-17%.

[0037] In the present invention, the mass fraction of the high-density board skeleton is preferably 25 to 30%, more preferably 28 to 30%, and even more preferably 29%.

[0038] In the present invention, the mass fraction of the aramid paper honeycomb is preferably 8-10%, more preferably 9-10%, and more preferably 9%. The aramid paper honeycomb is model 1.83 produced by Jilin Yinghao Industry and Trade Co., Ltd.

[0039] In the present invention, the mass fraction of the resin glue is preferably 10 to 13%, more preferably 10 to 12%, and even more preferably 11%.

[0040] In the present invention, the mass fraction of the carbon fiber cured sheet is preferably 33 to 37%, more preferably 35 to 37%, and even more preferably 36%.

[0041] In the present invention, the mass fraction of the iron embedded block is preferably 13 to 17%, more preferably 14 to 17%, and even more preferably 15%.

[0042] In the present invention, the high-density board skeleton is preferably a frame made of high-density fiberboard.

[0043] In the present invention, the outer frame width of the frame is preferably 45 to 55 mm, more preferably 48 to 53 mm, and even more preferably 50 mm.

[0044] In the present invention, the thickness of the high-density board skeleton is preferably 15 to 20 mm, more preferably 17 to 19 mm, and even more preferably 18 mm.

[0045] In the present invention, the density of the high-density board skeleton is preferably 900-1000 kg / m 3 , more preferably 925 to 975 kg / m 3 , more preferably 960kg / m 3 .

[0046] In the present invention, the thickness of the aramid paper honeycomb is preferably 15 to 20 mm, more preferably 17 to 19 mm, and even more preferably 18 mm.

[0047] In the present invention, the method for preparing the carbon fiber cured sheet is preferably as follows: placing release paper, carbon fiber prepreg, and release paper in sequence, performing heat pressing treatment, and removing the release paper to obtain the carbon fiber cured sheet.

[0048] In the present invention, the type of the carbon fiber prepreg is preferably carbon fiber T300.

[0049] In the present invention, the number of layers of the carbon fiber prepreg is preferably 3 to 6, more preferably 4 to 5, and even more preferably 4.

[0050] In the present invention, the thickness of the carbon fiber cured sheet is preferably 0.9 to 1.4 mm, more preferably 1.1 to 1.3 mm, and even more preferably 1.2 mm.

[0051] In the present invention, the density of the carbon fiber cured sheet is preferably 1200-1800 kg / m 3 , more preferably 1350~1650kg / m 3 , more preferably 1500kg / m 3 Compared with the aluminum plate used in traditional aluminum honeycomb floor, the density of aluminum plate is 2750kg / m 3 , indicating that the carbon fiber cured sheet has excellent weight reduction effect under the same size conditions.

[0052] In the present invention, the temperature of the heat pressing treatment is preferably 130 to 140°C, more preferably 133 to 138°C, and even more preferably 136°C.

[0053] In the present invention, the pressure of the heat press treatment is preferably 4 to 54 MPa, more preferably 4 to 12 MPa, and even more preferably 6 MPa.

[0054] In the present invention, the time of the heat pressing treatment is preferably 50 to 60 minutes, more preferably 52 to 57 minutes, and even more preferably 54 minutes.

[0055] In the present invention, the resin glue is preferably two-component epoxy resin glue WSR618.

[0056] In the present invention, the aramid paper honeycomb EMU floor is prepared from raw materials containing the following mass fractions:

[0057] High-density board skeleton 29%, aramid paper honeycomb 9%, resin glue 11%, carbon fiber cured sheet 36%, iron embedded block 15%.

[0058] The present invention also provides a method for preparing an aramid paper honeycomb EMU floor, comprising the following steps:

[0059] The demoulding paper a, the carbon fiber cured sheet a, the resin glue a, the aramid paper honeycomb, the high-density board frame, the iron embedded block, the resin glue b, the carbon fiber cured sheet b, and the demoulding paper b are sequentially placed, and molded and pressurized to obtain a semi-finished floor part; the semi-finished floor part is then processed by CNC milling to obtain a finished aramid paper honeycomb EMU floor;

[0060] Among them, the sum of the mass fractions of the carbon fiber cured sheet a and the carbon fiber cured sheet b is 33-37%, the mass fraction of the carbon fiber cured sheet a is 15-17%, and the mass fraction of the carbon fiber cured sheet b is 18-20%; the sum of the mass fractions of the resin glue a and the resin glue b is 10-13%, and the mass fractions of the resin glue a and the resin glue b are equal.

[0061] In the present invention, the sum of the mass fractions of the resin glue a and the resin glue b is preferably 10 to 13%, more preferably 10 to 12%, and even more preferably 11%.

[0062] In the present invention, the sum of the mass fractions of the carbon fiber cured sheet a and the carbon fiber cured sheet b is preferably 33 to 37%, more preferably 35 to 37%, and even more preferably 36%.

[0063] In the present invention, the temperature of the mold clamping and pressurizing treatment is preferably 20 to 30°C, more preferably 22 to 27°C, and even more preferably 25°C.

[0064] In the present invention, the pressure of the mold clamping and pressurizing treatment is preferably 1 to 1.5 MPa, more preferably 1.1 to 1.3 MPa, and even more preferably 1.2 MPa.

[0065] In the present invention, the time of the mold clamping and pressurizing treatment is preferably 24 to 30 hours, more preferably 26 to 29 hours, and even more preferably 27 hours.

[0066] In the present invention, the conditions for the numerical milling process are preferably: the diameter of the cylindrical milling cutter is The cylindrical milling cutter head speed is 9000r / min, the feed speed is 3000mm / min, the processing speed is 5000mm / min, and the retracting speed is 9000mm / min.

[0067] In the present invention, before the numerical milling process, the demoulding paper on the surface of the semi-finished floor part is removed.

[0068] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] Example 1

[0070] This embodiment provides an aramid paper honeycomb EMU floor, which is prepared from raw materials containing the following mass fractions:

[0071] High-density board skeleton 29%, aramid paper honeycomb 9% (model 1.83 produced by Jilin Yinghao Industry and Trade Co., Ltd., density 48kg / m 3 ), WSR618 two-component epoxy resin adhesive 11%, carbon fiber cured sheet 36%, iron embedded block 15%:

[0072] The thickness of the high-density board skeleton is 18mm, the specification is 820mm×820mm, the width of the outer frame is 60mm, and the density is 900kg / m 3 ; The thickness of the aramid paper honeycomb is 18 mm; The preparation method of the carbon fiber cured sheet is as follows: placing the release paper, 4 layers of carbon fiber T300 prepreg, and the release paper in sequence (the bright side of the release paper faces the carbon fiber T300 prepreg), hot pressing for 55 min at 135°C and 6 MPa, and removing the release paper to obtain the carbon fiber cured sheet. The thickness of the carbon fiber cured sheet is 1.2 mm, the specification is 850 mm×850 mm, and the density is 1500 kg / m 3 .

[0073] The preparation method of the aramid paper honeycomb EMU floor comprises the following steps:

[0074] The demoulding paper a, carbon fiber cured sheet a, WSR618 two-component epoxy resin glue a, aramid paper honeycomb, high-density board skeleton, iron embedded block, WSR618 two-component epoxy resin glue b, carbon fiber cured sheet b, and demoulding paper b are placed in sequence (the bright side of the demoulding paper faces the carbon fiber cured sheet), and mold closing and pressurizing treatment is performed at 25°C and 1.2MPa for 27h. After removing the demoulding paper, a semi-finished floor part is obtained; the semi-finished floor part is then subjected to CNC milling treatment, and the conditions for CNC milling treatment are: the diameter of the cylindrical milling cutter is The cylindrical milling cutter head speed is 9000r / min, the feed speed is 3000mm / min, the processing speed is 5000mm / min, and the retracting speed is 9000mm / min. The finished aramid paper honeycomb EMU floor is obtained. The specification of the finished floor is 800mm×800mm, and the structure is as follows Figure 1 As shown;

[0075] The mass fraction of the carbon fiber cured sheet a is 16%, the mass fraction of the carbon fiber cured sheet b is 20%, and the mass fractions of the resin glue a and the resin glue b are both 5.5%.

[0076] The aramid paper honeycomb EMU floor product obtained in Example 1 was applied to the "Fuxing" Beijing-Zhangjiakou high-speed rail intelligent EMU of CRRC Changchun Railway Vehicles Co., Ltd. The running speed of the EMU is 380km / h, which is the highest operating speed EMU at present. The train has low running noise, and the noise value does not exceed 70 decibels at the highest running speed; the train uses lightweight, green and environmentally friendly materials such as carbon fiber, paper honeycomb, and prepreg, and the weight can be reduced by 10%, which increases the passenger capacity of the train and realizes energy saving and high efficiency of train operation.

[0077] Comparative Example 1

[0078] This comparative example provides an aluminum honeycomb floor, which is prepared from raw materials containing the following mass fractions:

[0079] Panel 38.92%, aluminum honeycomb core 6.2%, profile frame 24.34%, WSR618 two-component epoxy resin glue 6.2%, backboard 16.04%, iron embedded block 8.3%;

[0080] The front panel and back panel are made of 5083-H111 hard aluminum plate. The thickness of the front panel is 2mm, the thickness of the back panel is 1mm, and the density is 2750kg / m 3 The aluminum honeycomb core material is made of 3003-H18 aluminum foil, with a lattice side length of 4mm, a thickness of not less than 0.06mm, and a density of 61kg / m 3 ; The profile frame is made of 6063-T5 aluminum alloy with a density of 2750kg / m 3 .

[0081] The preparation method comprises the following steps:

[0082] The demoulding paper a, back plate, WSR618 two-component epoxy resin adhesive layer a, profile frame layer embedded with aluminum honeycomb core material, WSR618 two-component epoxy resin adhesive layer b, panel, demoulding paper b (the bright side of demoulding paper faces the back plate and the panel) are molded and pressurized for 27 hours at 25°C and 1.2MPa, and the demoulding paper is removed to obtain a semi-finished floor. The semi-finished floor is then subjected to CNC milling. The conditions for CNC milling are: the diameter of the cylindrical milling cutter is The milling cutter speed is 3000r / min, the feed speed is 1000mm / min, the processing speed is 1500mm / min, and the retracting speed is 6000mm / min to obtain the finished aluminum honeycomb floor;

[0083] The mass fractions of the WSR618 two-component epoxy resin adhesive layer a and the WSR618 two-component epoxy resin adhesive layer b are both 3.1%.

[0084] Performance Test:

[0085] The aramid paper honeycomb floor prepared in Example 1 and the aluminum honeycomb floor prepared in Comparative Example 1 were tested for tensile strength according to the "Test Method for Tensile Strength of Sandwich Structure" (GB / T 1452-2005), for compressive strength according to the "Test Method for Flat Compressive Performance of Sandwich Structure or Core" (GB / T 1453-2005), for shear strength according to the "Test Method for Shear Performance of Sandwich Structure or Core" (GB / T 1455-2005), for peel strength according to the "Test Method for Roller Peel Strength of Sandwich Structure" (GB / T 1457-2005), for sound insulation strength according to the "Acoustic Building and Building Component Sound Insulation Measurement Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Components" (GB / T 19889.3-2005), and the mass per square meter of both were tested. The test results are shown in Table 1:

[0086] Table 1. Performance test results of aramid paper honeycomb floor and aluminum honeycomb floor

[0087]

[0088] From the performance data tested in Table 1, it can be seen that the mechanical properties of the aramid paper honeycomb floor are almost the same as those of the aluminum honeycomb floor, while the weight reduction and sound insulation performance are significantly improved. In addition, all the raw materials used in the present invention are environmentally friendly and pollution-free raw materials, which can be 100% degraded and will not cause secondary pollution to the environment. Furthermore, the cost of the aramid paper honeycomb floor is lower than that of the aluminum honeycomb floor, and the maintenance conditions are also simple, fast and convenient.

[0089] like Figure 4 , Figure 5As shown, under the condition of equal deflection, the weight reduction of the 17mm paper honeycomb sandwich panel (the paper honeycomb sandwich panel is an aramid paper honeycomb embedded in a high-density board skeleton) and the 5mm steel plate is almost 90%.

[0090] like Figure 6 As shown in the figure, when the thickness of the plate is t, its stiffness is 1.0, its flexural strength is 1.0, and its weight is 1.0; when the plates are sandwiched with aramid paper honeycomb core material of thickness t, compared with the pure plate of thickness t, the stiffness of the aramid paper honeycomb material is 7.0, the flexural strength is 3.5, and the weight is 1.03; when the plates are sandwiched with aramid paper honeycomb core material of thickness 3t, compared with the pure plate of thickness t, the stiffness of the aramid paper honeycomb material is 37.0, the flexural strength is 9.2, and the weight is 1.06. It can be seen that aramid paper honeycomb, as the core material of the EMU floor, has excellent mechanical strength while being light in weight, and is an ideal floor core material.

[0091] In summary, the aramid paper honeycomb floor obtained by the present invention adopts the new aramid paper honeycomb as the main material, takes the high-density board and the carbon fiber cured sheet as the skeleton frame, and is bonded with the epoxy resin glue as the auxiliary material. The main performance characteristics include extremely high flatness, uniform force, bending resistance, compression resistance, high fireproof grade, dimensional stability and low thermal expansion coefficient. Compared with the aluminum honeycomb floor and the phenolic floor, the mechanical properties are almost the same, but the tensile strength, compression resistance, sound insulation effect and weight reduction effect are greatly improved. It is suitable for operation in EMUs and has broad application prospects.

[0092] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An aramid paper honeycomb EMU floor, characterized in that: Prepared from raw materials containing the following mass fractions: High-density board skeleton 25~30%, aramid paper honeycomb 8~10%, resin glue 10~13%, carbon fiber cured sheet 33~37%, iron embedded block 13~17%; The high-density board skeleton is a frame made of high-density fiberboard, the aramid paper honeycomb is embedded in the frame made of high-density fiberboard, the outer frame width of the frame is 45-55 mm, the thickness of the high-density board skeleton is 15-20 mm, and the density of the high-density board skeleton is 900-1000 kg / m 3 ; The preparation method of the carbon fiber cured sheet is as follows: placing release paper, carbon fiber prepreg, and release paper in sequence, performing hot pressing treatment, and removing the release paper to obtain the carbon fiber cured sheet; The category of the carbon fiber prepreg is carbon fiber T300, the number of layers of the carbon fiber prepreg is 3 to 6, the thickness of the carbon fiber cured sheet is 0.9 to 1.4 mm, and the density of the carbon fiber cured sheet is 1200 to 1800 kg / m 3 ; The temperature of the hot pressing treatment is 130-140°C, the pressure of the hot pressing treatment is 4-54MPa, and the time of the hot pressing treatment is 50-60min; The resin glue is two-component epoxy resin glue WSR618; The method for preparing the aramid paper honeycomb EMU floor comprises the following steps: The demoulding paper a, the carbon fiber cured sheet a, the resin glue a, the aramid paper honeycomb, the high-density board frame, the iron embedded block, the resin glue b, the carbon fiber cured sheet b, and the demoulding paper b are sequentially placed, and molded and pressurized to obtain a semi-finished floor part; the semi-finished floor part is then processed by CNC milling to obtain a finished aramid paper honeycomb EMU floor; Among them, the sum of the mass fractions of the carbon fiber cured sheet a and the carbon fiber cured sheet b is 33-37%, and the sum of the mass fractions of the resin glue a and the resin glue b is 10-13%; The temperature of the mold-closing pressurizing treatment is 20-30° C., the pressure of the mold-closing pressurizing treatment is 1-1.5 MPa, and the time of the mold-closing pressurizing treatment is 24-30 hours.

2. The aramid paper honeycomb EMU floor according to claim 1, characterized in that: Prepared from raw materials containing the following mass fractions: High-density board skeleton 29%, aramid paper honeycomb 9%, resin glue 11%, carbon fiber cured sheet 36%, iron embedded block 15%.

3. The method for preparing the aramid paper honeycomb EMU floor according to claim 1 or 2, characterized in that: The following steps are involved: The demoulding paper a, the carbon fiber cured sheet a, the resin glue a, the aramid paper honeycomb, the high-density board frame, the iron embedded block, the resin glue b, the carbon fiber cured sheet b, and the demoulding paper b are sequentially placed, and molded and pressurized to obtain a semi-finished floor part; the semi-finished floor part is then processed by CNC milling to obtain a finished aramid paper honeycomb EMU floor; Among them, the sum of the mass fractions of the carbon fiber cured sheet a and the carbon fiber cured sheet b is 33-37%, and the sum of the mass fractions of the resin glue a and the resin glue b is 10-13%; The temperature of the mold-closing pressurizing treatment is 20-30° C., the pressure of the mold-closing pressurizing treatment is 1-1.5 MPa, and the time of the mold-closing pressurizing treatment is 24-30 hours.

4. The method for preparing an aramid paper honeycomb EMU floor according to claim 3, characterized in that: The conditions for the numerical milling process are: the diameter of the cylindrical milling cutter is φ6, the rotation speed of the cylindrical milling cutter head is 9000r / min, the feed speed is 3000mm / min, the processing speed is 5000mm / min, and the retracting speed is 9000mm / min.

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