CN212920658U - Composite board for truck exterior trim - Google Patents

Composite board for truck exterior trim Download PDF

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Publication number
CN212920658U
CN212920658U CN202022199669.1U CN202022199669U CN212920658U CN 212920658 U CN212920658 U CN 212920658U CN 202022199669 U CN202022199669 U CN 202022199669U CN 212920658 U CN212920658 U CN 212920658U
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layer
truck
composite
board
paper honeycomb
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CN202022199669.1U
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孟辰屹
孟丙浩
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Nanjing Baiduan Science And Trade Co ltd
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Nanjing Baiduan Science And Trade Co ltd
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Abstract

The utility model relates to the technical field of truck decorative boards, in particular to a composite board for truck exterior decoration, which is provided with a surface layer, a middle layer and a reinforcing layer from top to bottom in sequence; the reinforcing layer is a composite board of a PU layer and one of a paper honeycomb board, glass fiber cloth or a wire mesh; still be equipped with the chromatograph between intermediate level and the top layer, the chromatograph is the mixed layer of the PMMA of pigment particle dispersion, the material that the top layer adopted is PMMA, the material in intermediate level is strenghthened type ABS or PC, through the paper honeycomb panel, the interpolation of glass fiber cloth or wire netting can compensate among the prior art truck air-inlet grille heat resistance not enough, the fragility is big, and the high microthermal problem of not nai, and through the interpolation of back up coat, can make the composite sheet reach better mechanical properties, thereby can suitably reduce the thickness on top layer and intermediate level, thereby can make the composite sheet more light, the cost is lower, the utility model has the advantages of be convenient for process, weight is lighter, the cost is lower, high and low temperature resistant, toughness strength is better.

Description

Composite board for truck exterior trim
Technical Field
The utility model relates to a truck decorative board technical field, concretely relates to a composite sheet for truck exterior trim.
Background
With the rapid development of the automobile industry in China, the light weight, low oil consumption, high safety, environmental pollution reduction and automobile manufacturing and use comprehensive cost reduction become common recognition of the automobile industry increasingly, at present, materials commonly used for automobile spare tire covers in China comprise wood powder plates, polypropylene honeycomb plates and the like, and due to the fact that the weight is heavy, the bearing performance is poor, VOC (volatile organic compounds) seriously exceed standards and the design is single, the requirements of the prior art indexes and consumers on the automobile quality are not met any more, the application of the spare tire cover materials is eliminated in the coming years, and the production of scratch resistance is realized along with the improvement of the living standard.
The paper honeycomb board is a paper board compounded by surface paper on the upper side and the lower side of a honeycomb paper core, can be made into various shapes, specifications and sizes according to the requirements of products, and has the advantages of good buffering performance, environmental protection, light weight, easy recovery and the like.
Disclosure of Invention
The to-be-solved problem of the utility model is to provide a be convenient for processing, weight is lighter, the cost is lower, resistant high low temperature, the better composite sheet that is used for truck exterior trim of toughness strength.
In order to solve the technical problem, the utility model discloses a technical scheme is: a composite board for truck exterior trim is provided with a surface layer, a middle layer and a reinforcing layer from top to bottom in sequence;
the reinforcing layer is a composite board of a paper honeycomb board, glass fiber cloth or iron wire mesh and a PU layer.
Further, the back up coat be paper honeycomb board with the composite sheet one on PU layer, the PU layer is located paper honeycomb board both sides, the aperture of paper honeycomb board is 3.5mm, and pore wall thickness is 1.8 mm.
Further, the reinforcing layer is made of glass fiber cloth and the PU layer is a second composite board, the glass fiber cloth is arranged between the two PU layers, and the second composite board is obtained through curing and forming.
Furthermore, the back up coat be the wire netting with the composite sheet three on PU layer, the wire netting soak in the PU layer, the thickness on PU layer is greater than the thickness of wire netting.
Further, a color layer is arranged between the middle layer and the surface layer, and the color layer is a PMMA mixed layer with dispersed pigment particles.
Further, the pigment particles may be pearlescent pigment particles, metallic pigment particles, or mixed pigment particles, and the like.
Furthermore, the surface layer is made of PMMA, and the middle layer is made of reinforced ABS or PC.
Furthermore, the PMMA, ABS, PC or PU raw material particles are subjected to surface cleaning treatment and drying treatment, so that the water content is reduced to 0.03 percent, and the PMMA, ABS, PC or PU raw material particles can be used.
A method of processing a composite panel for truck exteriors, comprising the steps of:
the method comprises the following steps: preparing the intermediate layer by injection molding, wherein the injection molding temperature is 180-330 ℃, and obtaining the intermediate layer;
step two: preparing a reinforcing layer, placing the middle layer into a mold, spraying, mold closing and mold pressing to prepare the reinforcing layer, wherein the mold closing pressure is 18-20MPa, the pressing time is 120-130s, and the mold temperature is 120-130 ℃ to obtain a semi-finished product;
step three: sequentially injecting a color layer and a surface layer into the semi-finished product through a mould, wherein the color layer is prepared by adding pigment particles into PMMA heated to 330 ℃ and uniformly stirring, the injection temperature of the color layer is 120-;
step four: and carrying out die pressing on the crude product, wherein the die pressing pressure is 18-20MPa, the pressing time is 120-130s, and the die temperature is 120-130 ℃, so as to obtain a finished product.
Further, the finished product can be trimmed, cut and the like when in use.
Further, the mould includes mould and shaping lower mould on the shaping, mould and shaping lower mould phase-match on the shaping.
Further, in the second step, the preparation method of the composite board one comprises the following steps:
after the PU is melted, the PU is sprayed on the middle layer, and the paper honeycomb board is laid on the PU layer by spraying a certain thickness, is punched, is cured by heat preservation, is placed into a die, and is sprayed, matched and molded outside the paper honeycomb board to prepare a reinforcing layer.
Further, in the second step, the preparation method of the second composite board comprises the following steps:
after the PU is melted, the PU is sprayed on the middle layer, and the glass fiber cloth is laid on the PU layer by spraying a certain thickness, is punched, is cured by heat preservation, is put into a die, and is sprayed, closed and molded outside the glass fiber cloth to prepare a reinforcing layer.
Further, in the second step, the preparation method of the composite board III comprises the following steps:
and infiltrating the wire mesh into the melted PU, spraying the melted PU on the middle layer, paving the wire mesh on the PU layer by spraying a certain thickness, continuously spraying until the thickness of the PU layer is greater than that of the wire mesh, stamping, and performing heat preservation and solidification.
Compared with the prior art, the utility model has the advantages and positive effect be:
the utility model discloses an add of paper honeycomb panel, glass fiber cloth or wire netting can compensate among the prior art truck kuppe heat resistance not enough, the fragility is big, and not resistant high low temperature problem, and through the interpolation of back up coat, can make the composite sheet reach better mechanical properties, thereby can suitably reduce the thickness of top layer and intermediate level, thereby can make the composite sheet lighter, the cost is lower, paper honeycomb panel is hollow structure, obtain through the foaming, consequently can save material, alleviate the weight of part when having higher intensity; the glass fiber cloth has stronger toughness, and is firmly adhered to the inner part of the PU layer through the viscosity generated by the melting of PU, so that the strength and the toughness of the part can be ensured; the wire netting has higher intensity and toughness, and the plasticity of just being convenient for, when guaranteeing mechanical strength, the processing of being convenient for is buckled, the utility model provides a decorative position that needs certain intensity such as truck guide plate, truck front face, air-inlet grille can be applied to the composite sheet, has the processing of being convenient for, weight is lighter, the cost is lower, resistant high and low temperature, advantage that toughness strength is better.
Drawings
FIG. 1 is a cross-sectional structural view of the present invention;
fig. 2 is a structural view of embodiment 1 of the present invention;
fig. 3 is a structural view of embodiment 2 of the present invention;
fig. 4 is a structural diagram of embodiment 3 of the present invention.
In the figure: surface layer-1, intermediate layer-2, reinforcing layer-3, paper honeycomb board-4, glass fiber cloth-5, wire netting-6, composite board one-7, composite board two-8, composite board three-9, color layer-10 and PU layer-11.
Detailed Description
For a better understanding of the present invention, reference will now be made to the following descriptions taken in conjunction with the accompanying drawings and specific examples.
As shown in fig. 1-4, a composite board for truck exterior trim is provided with a surface layer 1, an intermediate layer 2 and a reinforcing layer 3 from top to bottom;
the back up coat 3 is paper honeycomb panel 4, one kind of the composite sheet of glass fiber cloth 5 or wire netting 6 and PU layer 11, through paper honeycomb panel 4, the interpolation of glass fiber cloth 5 or wire netting 6 can compensate among the prior art truck kuppe heat resistance not enough, the fragility is big, and the high low temperature resistant problem not, and through the interpolation of back up coat 3, can make the composite sheet reach better mechanical properties, thereby can suitably reduce top layer 1 and 2 thickness in intermediate level, thereby can make the composite sheet more light, the cost is lower.
The back up coat 3 is a composite sheet 7 of paper honeycomb panel 4 and PU layer 11, and 4 both sides of paper honeycomb panel are located on PU layer 11, and the aperture of paper honeycomb panel 4 is 3.5mm, and pore wall thickness is 1.8mm, and paper honeycomb panel 4 is hollow structure, obtains through the foaming, consequently can save material, alleviate the weight of part when having higher strength.
The back up coat 3 is two 8 of glass fiber cloth 5 and the composite sheet on PU layer 11, and glass fiber cloth 5 is located between two-layer PU layer 11, obtains two 8 of composite sheet through the solidification shaping, and glass fiber cloth 5 has stronger toughness, melts through PU and produces viscidity with glass fiber cloth firmly glue in PU layer 11 insidely, can guarantee the intensity and the toughness of part.
The back up coat 3 is three 9 of composite sheet of wire netting 6 and PU layer 11, and wire netting 6 soaks in PU layer 11, and the thickness on PU layer 11 is greater than wire netting 6's thickness, and wire netting 6 has higher intensity and toughness, and the plasticity of just can being convenient for, when guaranteeing mechanical strength, the processing of being convenient for is buckled.
Still be equipped with the chromatograph 10 between intermediate level 2 and the top layer 1, coloured layer 10 mixes the layer for the PMMA of pigment granule dispersion, and the setting on coloured layer 10 can compromise the pleasing to the eye of composite sheet, has better decorative effect when practical.
The surface layer 1 is made of PMMA, and the middle layer 2 is made of reinforced ABS or PC.
Example 1, as shown in fig. 2:
a method of processing a composite panel for truck exteriors, comprising the steps of:
the method comprises the following steps: melting the reinforced ABS, and preparing the middle layer 2 by injection molding at 180 ℃ to obtain the middle layer 2;
step two: preparing a reinforcing layer 3, heating PU to 180 ℃ to melt, spraying the PU on the middle layer 2, spraying a certain thickness to lay the paper honeycomb board 4 on the PU layer 11, stamping, keeping the temperature of the middle layer 2 at 160 ℃, curing for 30s, placing the PU layer 11 with certain viscosity but reduced fluidity into a die, spraying, die closing and die pressing the outer side of the paper honeycomb board 4 to prepare the reinforcing layer 3, wherein the die closing pressure is 18MPa, the pressing time is 130s, and the die temperature is 130 ℃ to obtain a semi-finished product;
step three: sequentially injecting a color layer 10 and a surface layer 1 into the semi-finished product through a mold, wherein the color layer 10 is prepared by adding PMMA heated to 330 ℃ into pearlescent pigment particles and uniformly stirring, the injection molding temperature of the color layer 10 is 120 ℃, and the injection molding temperature of PMMA adopted by the surface layer 1 is 180 ℃, so as to obtain a crude product;
step four: and (3) carrying out die pressing on the crude product, wherein the die pressing pressure is 18MPa, the pressing time is 120s, and the die temperature is 120 ℃, so as to obtain a finished product as an experimental group A.
Example 2, as shown in fig. 3:
the method comprises the following steps: melting PC, and preparing the middle layer 2 by injection molding at 330 ℃ to obtain the middle layer 2;
step two: preparing a reinforcing layer 3, heating PU11 to 180 ℃, melting, spraying and coating the melted PU11 on the middle layer 2, spraying a certain thickness, laying the paper honeycomb board 4 on the PU layer 11, stamping, keeping the temperature of the middle layer 2 at 160 ℃, curing for 30s, putting the PU layer 11 with certain viscosity but reduced fluidity into a die, and then spraying, die closing and die pressing the outer side of the glass fiber cloth 5 to prepare the reinforcing layer 3; the mold closing pressure is 19MPa, the pressing time is 125s, and the mold temperature is 120 ℃, so that a semi-finished product is obtained;
step three: sequentially injecting a color layer 10 and a surface layer 1 into the semi-finished product through a mould, wherein the color layer 10 is prepared by adding a pearlescent pigment into PMMA heated to 330 ℃ and uniformly stirring, the injection molding temperature of the color layer 10 is 130 ℃, and the injection molding temperature of the surface layer 1 is 230 ℃ to obtain a crude product;
step four: and (3) carrying out die pressing on the crude product, wherein the die pressing pressure is 19MPa, the pressing time is 125s, and the die temperature is 125 ℃, so as to obtain a finished product, which is used as an experimental group B.
Example 3, as shown in fig. 4:
a method of processing a composite panel for truck exteriors, comprising the steps of:
the method comprises the following steps: heating a copolymer formed by blending 30% of ABS and 70% of PC, and preparing the middle layer 2 by injection molding at 240 ℃ to obtain the middle layer 2;
step two: preparing a reinforcing layer 3, heating PU to 180 ℃ for melting, soaking the wire netting 6 in the melted PU, spraying the melted PU on the middle layer 2, spraying a certain thickness, keeping the temperature of the middle layer 2 at 160 ℃, curing for 30s, laying the wire netting 6 on the PU layer 11, continuing spraying until the thickness of the PU layer 11 is more than that of the wire netting 6, stamping, preserving heat and curing; putting the reinforcing layer 3 into a mold, and carrying out mold closing and mold pressing treatment, wherein the mold closing pressure is 20MPa, the pressing time is 120s, and the mold temperature is 125 ℃, so as to obtain a semi-finished product;
step three: sequentially injecting a color layer 10 and a surface layer 1 into the semi-finished product through a mould, wherein the color layer 10 is prepared by adding a pigment into PMMA heated to 330 ℃ and uniformly stirring, the injection molding temperature of the color layer 10 is 125 ℃, and the injection molding temperature of the surface layer 1 is 220 ℃ to obtain a crude product;
step four: and (3) carrying out die pressing on the crude product, wherein the die pressing pressure is 20MPa, the pressing time is 130s, and the die temperature is 130 ℃, so as to obtain a finished product as an experimental group C.
Example 4:
the method comprises the following steps: melting PC, and preparing the middle layer 2 by injection molding at 330 ℃ to obtain the middle layer 2;
step two: preparing a reinforcing layer 3, heating PU to 180 ℃ for melting, and then carrying out die assembly, injection molding and mould pressing to prepare the reinforcing layer 3; the mold closing pressure is 19MPa, the pressing time is 125s, and the mold temperature is 120 ℃, so that a semi-finished product is obtained;
step three: sequentially performing injection molding on the semi-finished product through a mold to obtain a color layer 10 and a surface layer 1, wherein the color layer 10 is prepared by adding a pearlescent pigment into PC heated to 330 ℃ and uniformly stirring, the injection molding temperature of the color layer 10 is 130 ℃, and the injection molding temperature of the surface layer 1 is 230 ℃ to obtain a crude product;
step four: and (3) carrying out die pressing on the crude product, wherein the die pressing pressure is 19MPa, the pressing time is 125s, and the die temperature is 125 ℃, so as to obtain a finished product, which is used as an experimental group D.
Example 5:
the method comprises the following steps: melting PC, and preparing the middle layer 2 by injection molding at 330 ℃ to obtain the middle layer 2;
step two: sequentially injecting a color layer 10 and a surface layer 1 into the semi-finished product through a mould, wherein the color layer 10 is prepared by adding a pearlescent pigment into PMMA heated to 330 ℃ and uniformly stirring, the injection molding temperature of the color layer 10 is 130 ℃, and the injection molding temperature of the surface layer 1 is 230 ℃ to obtain a crude product;
step three: and (3) carrying out die pressing on the crude product, wherein the die pressing pressure is 19MPa, the pressing time is 125s, and the die temperature is 125 ℃, so as to obtain a finished product serving as a control group A.
Example 6:
heating PU to 180 ℃ to melt, and then carrying out die assembly, injection molding and mould pressing to prepare an intermediate layer 2; the mold clamping pressure was 19MPa, the pressing time was 125s, and the mold temperature was 120 ℃ to obtain the PU layer 11 as a control group B.
Example 7:
the effects of experimental groups A-D and control groups A-B were tested.
1. Measurement of mechanical properties: the finished products of examples 1-6 were cut into smooth resin strips of the same size using a cutter, and subjected to tensile and bending strength tests using a WAW-C universal tester, and the results of the tests were averaged for three sets of samples, as shown in Table 1.
Table 1: mechanical properties
And (4) conclusion: table 1 summarizes the tensile strength and the bending strength of examples 1 to 6, and it can be seen that the tensile strength of the materials of experimental groups a to C is 63 to 69Mpa, and the bending strength is 92 to 123Mpa, and it can be seen that the materials provided in examples 1 to 3 have better toughness, are not easily broken, and are not easily damaged during the use, transportation, and installation processes, while the mechanical properties of the materials provided in experimental group D are poorer than those of experimental groups a to C, because the experimental group D is made of resin only, and no supporting framework exists therein, so that the mechanical properties thereof are affected to some extent, and the comparative groups a to B use less kinds of resin, so that the constraining force caused by the difference in mechanical properties between layers is reduced, and therefore the mechanical properties of the comparative groups a to B are the worst.
2. Measurement of thermal Properties: the composite plate materials of examples 1 to 6 were cut into 10 mm-long cubic pieces, which were placed inside sample tubes of an expansion machine and measured, and the samples were cut into pieces of the same size and placed between stages of a temperature measuring machine, respectively, and a load of 1.82Mpa was applied to the samples to raise the temperature at a constant rate, thereby measuring the thermal deformation temperature of the materials, and the experimental results of the samples are shown in table 2.
Table 2: determination of thermal Properties
And (4) conclusion: table 2 summarizes the thermal properties of examples 1 to 6, and under the condition of 1.82Mpa, the thermal deformation temperature of the material provided in examples 1 to 3 is higher than 90 ℃ to 92 ℃, and the thermal expansion coefficient is lower, it can be seen that the material provided in examples 1 to 3 has better thermal properties, while the thermal deformation temperature of the material provided in experimental group D is lower, and in the comparison groups a to B, fewer types of resins are used, so that the constraint force caused by the difference in mechanical properties between layers is reduced, and therefore the comparison groups a to B are more likely to generate the expansion deformation phenomenon, and in the ordinary life, the stability can be kept better after installation, and the thermal expansion cannot cause damage in the using process, so that the problems of insufficient heat resistance, large brittleness and low temperature resistance of the truck cowl in the prior art can be solved.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.

Claims (5)

1. A composite panel for a truck exterior trim, characterized by: the surface layer (1), the middle layer (2) and the reinforcing layer (3) are sequentially arranged from top to bottom;
the reinforcing layer (3) is a composite board of a paper honeycomb board (4), glass fiber cloth (5) or an iron wire net (6) and a PU layer (11).
2. A composite panel for use in truck exteriors according to claim 1, wherein: the reinforced layer (3) is a paper honeycomb plate (4) and a composite plate (7) of the PU layer (11), the PU layer (11) is arranged on two sides of the paper honeycomb plate (4), the aperture of the paper honeycomb plate (4) is 3.5mm, and the thickness of the hole wall is 1.8 mm.
3. A composite panel for use in truck exteriors according to claim 1, wherein: the reinforced layer (3) is a glass fiber cloth (5) and a second composite board (8) of the PU layer (11), the glass fiber cloth (5) is arranged between the two PU layers (11), and the second composite board (8) is obtained through curing and forming.
4. A composite panel for use in truck exteriors according to claim 1, wherein: reinforcing layer (3) be wire netting (6) with composite sheet three (9) on PU layer (11), wire netting (6) soak in PU layer (11), the thickness on PU layer (11) is greater than the thickness of wire netting (6).
5. A composite panel for use in truck exteriors according to claim 2, wherein: the surface layer (1) is made of PMMA, and the middle layer (2) is made of reinforced ABS or PC.
CN202022199669.1U 2020-09-29 2020-09-29 Composite board for truck exterior trim Active CN212920658U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022199669.1U CN212920658U (en) 2020-09-29 2020-09-29 Composite board for truck exterior trim

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022199669.1U CN212920658U (en) 2020-09-29 2020-09-29 Composite board for truck exterior trim

Publications (1)

Publication Number Publication Date
CN212920658U true CN212920658U (en) 2021-04-09

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Application Number Title Priority Date Filing Date
CN202022199669.1U Active CN212920658U (en) 2020-09-29 2020-09-29 Composite board for truck exterior trim

Country Status (1)

Country Link
CN (1) CN212920658U (en)

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