CN113001861B

CN113001861B - Method for manufacturing composite board

Info

Publication number: CN113001861B
Application number: CN202110198462.9A
Authority: CN
Inventors: 李涂丞炳; 陈兴开; 常子安; 和晓慧
Original assignee: Panasonic Corp of China
Current assignee: Panasonic Corp of China
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2022-11-25
Anticipated expiration: 2041-02-22
Also published as: CN113001861A

Abstract

The invention relates to the technical field of composite board manufacturing, and particularly provides a method for manufacturing a composite board, which can effectively reduce the stress applied to a vacuum insulation board in a foaming process. The manufacturing method of the composite board comprises the following steps: s1, laying a vacuum insulation plate on the bottom of a mold; s2, foaming in a space between the upper part of the vacuum insulation plate and the top of the mould in a mode of attaching to one side surface of the vacuum insulation plate to form a single-side foaming piece; s3, turning the single-side foaming piece in the step S2 up and down, and then tiling the single-side foaming piece at the bottom of the mold; and S4, foaming in a mode of attaching the other side surface of the vacuum insulation panel in the space between the upper part of the single-side foaming piece and the top of the mould in the step S3.

Description

Method for manufacturing composite board

Technical Field

The invention relates to the technical field of composite board manufacturing, in particular to a manufacturing method of a composite board.

Background

In order to improve heat insulation or cold insulation performance, many heat insulation or cold insulation devices, such as a carriage of a refrigerator car, a wall surface of a refrigerated warehouse, a refrigerator, and the like, need to be made of a composite sheet material having excellent heat insulation performance.

The existing composite board for the heat preservation or cold insulation device is generally manufactured by wrapping a foaming material with a skin, in order to meet the requirement of heat insulation performance, the thickness of the foaming material is generally required to be increased, and the increase of the thickness causes the increase of the whole weight and volume of the composite board, so that the transportation is difficult, and the storage space of the heat preservation or cold insulation device (such as a carriage, a warehouse or a refrigerator) is occupied.

In order to achieve the strength, thermal insulation and surface density of the composite panel, the skilled person tries to provide a technical solution to embed a vacuum insulation panel in the foam, however, the following problems are encountered in manufacturing the composite panel with the structure: generally, the strength of the vacuum insulation panel is limited, and the foam material may press the vacuum insulation panel from both sides during the foaming process of the foam material, so that the vacuum insulation panel may be deformed or even damaged. This problem becomes more apparent when composite boards with larger dimensions are to be produced. In addition, the foaming materials on both sides of the vacuum insulation panel are difficult to be uniformly filled, and the deformation of the vacuum insulation panel is further increased due to the uneven filling of the foaming materials.

Therefore, it is an urgent technical problem in the art to provide a method for manufacturing a composite board in which the foamed material is embedded in the vacuum insulation panel structure, and the stress applied to the vacuum insulation panel during the foaming process can be reduced.

Disclosure of Invention

Aiming at the problems, the invention provides a manufacturing method of a composite board, which can effectively reduce the stress applied to a vacuum insulation board in a foaming process.

The manufacturing method of the composite board comprises the following steps:

s1, flatly paving a vacuum heat insulation plate at the bottom of a mould;

s2, foaming in a space between the upper part of the vacuum insulation plate and the top of the mould in a mode of attaching to one side surface of the vacuum insulation plate to form a single-side foaming piece;

s3, turning the single-side foaming piece in the step S2 up and down, and then flatly paving the single-side foaming piece at the bottom of the mold;

and S4, foaming in a mode of attaching the other side surface of the vacuum insulation panel in the space between the upper part of the single-side foaming piece and the top of the mould in the step S3.

According to the technical scheme, the vacuum insulation panel is basically kept horizontal in the processing process of the composite board. The horizontal processing and foaming mode can be suitable for processing composite plates with large area, so that the foaming material basically keeps uniform foaming in the direction of the whole large-area plate surface.

In addition, because the mode of foaming on one side of the vacuum insulation panel and then foaming on the other side of the vacuum insulation panel twice is adopted, the stress generated in the foaming process can be released to the upper foaming space by setting the foaming process instead of applying force to the vacuum insulation panel. Through the mode, the problem that the foaming materials on two sides exert force on the middle vacuum insulation panel to extrude and deform the middle vacuum insulation panel can be effectively relieved or even solved.

In a preferred embodiment of the present invention, before step S2, the method further includes: s11, arranging a first outer frame on the outer edge of the vacuum insulation panel; s12, covering a first skin on the top of the first outer frame.

According to the preferred technical scheme, the first outer frame and the first skin can effectively limit a regular foaming space, so that foaming materials obtained through foaming are more tidy and uniform. The first skin can further reinforce the outer surface structure of the composite board, and the abrasion resistance, the corrosion resistance and the structural strength of the composite board are improved.

Further, in a preferred embodiment of the present invention, before step S2, the method further includes: s13, placing a first padding for supporting the first skin on the vacuum insulation panel. According to the preferred technical scheme, in the process of preparing the composite board with a large area, the first skin has certain ductility or plasticity, and the center of the first skin can be sunken towards the bottom of the mold under the action of gravity, so that the problem of uneven thickness of the foaming material is solved. The first padding is arranged between the first skin and the vacuum insulation board in a cushioning mode, powerful support can be provided for the first skin, the whole first skin is basically kept horizontal in the foaming process, and the thickness consistency of the composite board is guaranteed.

Further, in a preferred embodiment of the present invention, the first padding has elasticity, and a thickness of the first padding is greater than a thickness difference between the first outer frame and the vacuum heat insulation plate.

According to the better technical scheme, the elastic first padding material can tolerate a certain dimensional tolerance, and the problems of untight abutting and overlarge deformation caused by overlarge dimensional deviation of the hard padding material are avoided. The thickness of the first padding is slightly larger than the thickness difference between the first outer frame and the vacuum heat insulation plate, so that the first padding can apply certain elastic stress to the first skin, higher friction resistance is generated, and the stress generated in the foaming process is prevented from changing the transverse position of the first skin.

Further, in a preferred embodiment of the present invention, both ends of the first padding are coated with an adhesive. According to this preferred technical scheme, first bedding and padding can accomplish to bond fixedly to vacuum insulation panel and first covering, can stabilize the position of first covering on the one hand in the foaming process, avoids the foaming stress to cause the lateral displacement of first covering, and on the other hand can improve the stability of unilateral foaming piece structure again in-process of upset unilateral foaming piece from top to bottom.

Further, in a preferred embodiment of the present invention, after step S3 and before step S4, the method further includes: s31, arranging a second outer frame on the top of the first outer frame; and S32, covering a second skin on the top of the second outer frame. The two outer frames, namely the first outer frame and the second outer frame, are used, so that the composite plate can be flexibly adapted to composite plates with different thickness requirements on foaming materials on two sides of the vacuum heat-insulating plate, in other words, the composite plates with different thicknesses of the foaming materials on two sides can be manufactured by adjusting the thickness proportion of the first outer frame and the second outer frame. And the double-layer skin structure can also reinforce the surfaces of the two sides of the composite board, so that the abrasion resistance, the corrosion resistance and the structural strength of the composite board are improved. In addition, the second outer frame and the second skin can effectively limit the regular foaming space for secondary foaming, so that the foaming material obtained by foaming is more tidy and uniform.

In a preferred embodiment of the present invention, after step S3 and before step S4, the method further includes: and S33, placing a second padding for supporting a second skin on the vacuum insulation panel. In the process of preparing the composite board with a large area, the second skin has certain ductility or plasticity, and the center of the second skin can be sunken towards the bottom of the mould under the action of gravity, so that the problem of uneven thickness of the foaming material is caused. The second cushion material is filled between the second skin and the single-side foaming piece, so that powerful support can be provided for the second skin, the whole second skin is basically kept horizontal in the secondary foaming process, and the thickness consistency of the composite board is ensured.

Further, the second padding has elasticity, and the thickness of the second padding is greater than that of the second outer frame. The elastic second padding can allow certain dimensional tolerance, and the problems of untight abutting and overlarge deformation caused by overlarge dimensional deviation of the hard padding are avoided. The thickness of the second padding is slightly larger than that of the second outer frame, so that the second padding can apply certain elastic stress to the second skin, higher friction resistance is generated, and the stress generated in the foaming process is prevented from changing the transverse position of the second skin.

Further, both ends of the second mat are coated with an adhesive. According to the better technical scheme, the second padding can be used for bonding and fixing the vacuum insulation plate and the second skin, so that the position of the second skin can be stabilized in the foaming process, the transverse displacement of the second skin caused by foaming stress is avoided, and the overall structural strength of the composite board can be improved.

In a preferred embodiment of the present invention, the step S2 and the step S4 use the same mold for foaming, and after the step S2 and before the step S4, the method further comprises: and S34, adjusting a gap between the top of the mold and the bottom of the mold. Through adjusting the clearance distance between mould top and bottom in manufacturing process, can use same mould in whole manufacturing process, avoid the problem that the cost that multiunit mould brought rises.

In a preferred embodiment of the present invention, the manufacturing method is used to fabricate a wafer having an area of 2m ² The above composite board. The manufacturing method can be well suitable for manufacturing large-area composite plates, the composite plates with large-area vacuum insulation panels embedded with foaming materials are produced, the produced composite plates are good in flatness and uniform in thickness, the stress deformation amount of the vacuum insulation panels is small, and the quality is more reliable.

In a preferred technical scheme of the invention, the first padding and the foaming material on one side surface of the vacuum heat insulation plate are made of the same material, and the second padding and the foaming material on the other side surface of the vacuum heat insulation plate are made of the same material. The padding and the foaming material which are made of the same material are used, so that the overall performance parameters of the foaming material and the padding are kept consistent, the binding force between the same materials is tighter, and the overall structural strength is excellent.

In a preferred technical scheme of the invention, the first padding, the second padding and the foaming material are made of polyurethane materials. The polyurethane material has more excellent strength, fire resistance, heat insulation performance and the like, and can meet various performance requirements of the foaming material.

Drawings

FIG. 1 is a block diagram of a composite panel provided by an embodiment of the present invention;

FIG. 2 is a flow chart of a method of manufacturing a composite panel provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the outermost edge of the assembly obtained at the stage S12 in the embodiment of FIG. 2;

FIG. 4 is a schematic structural view of a one-sided foam part obtained at the stage S2 in the embodiment of FIG. 2;

FIG. 5 is a schematic diagram of the structure of the components obtained at the stage S32 in the embodiment of FIG. 2;

fig. 6 is a schematic diagram of the structure of the components obtained at the step S4 in the embodiment of fig. 2.

Reference numerals: 1-vacuum insulation panels; 2-foaming material; 3-covering the skin; 31-a first skin; 32-a second skin; 4-molding; 51-a first outer frame; 52-a second outer frame; 61-a first pad; 62-a second mat; 7-one-sided foam.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The present embodiment provides a method of manufacturing a composite board, which is used for manufacturing the composite board shown in fig. 1. The composite board is of a multi-layer sandwich structure, the core material is a vacuum heat-insulating plate 1, and the two sides of the vacuum heat-insulating plate 1 are provided with foaming materials 2, specifically polyurethane foaming materials.

The two sides of the polyurethane foaming material are covered with the skins 3, the vacuum heat insulation plate 1 can greatly improve the heat insulation performance of the composite board, and the thickness of the foaming material 2 required to be used is reduced on the premise of ensuring the heat insulation performance. The polyurethane foam material can meet various performance requirements of the foam material 2, such as strength, fire resistance and heat insulation performance, and the polyurethane foam material has relatively low hardness, so that the polyurethane foam material can have good protection and buffering effects on the vacuum heat-insulating plate 1, and the damage to the vacuum heat-insulating plate 1 caused by bumping or impact in the transportation process is avoided. The skin 3, including the first skin 31 and the second skin 32, can improve the abrasion resistance, the corrosion resistance and the structural strength of the composite board, and a regular foaming space is defined in the manufacturing process, so that the foaming material 2 obtained by foaming is more neat and uniform.

In addition, the method for manufacturing the composite board provided by the embodiment is suitable for manufacturing the composite board with the area of 2m ² The above composite sheet is, for example, a composite sheet constituting a compartment or a wall surface of a refrigerator compartment, a refrigerated warehouse, or a refrigerated container. The large-area composite board produced by the manufacturing method provided by the embodiment has excellent flatness and uniform thickness, and the polyurethane foam material has smaller stress deformation applied to the vacuum heat insulation board 1, so that the quality is more reliable.

The following describes a method for manufacturing a composite board according to the present embodiment with reference to the drawings.

Fig. 2 is a flowchart showing a method for manufacturing a composite board according to the present embodiment, which specifically includes the following steps.

Referring to fig. 2 and 3, firstly, a mold 4 for preparing a composite board is provided, the top and bottom of the mold 4 are made of heavy-weight die plates made of metal, and the top die plate and the bottom die plate are fixedly connected by a threaded connection. The distance between the die pressing plate at the top and the die pressing plate at the bottom can be adjusted by utilizing the threaded connecting piece, and in the subsequent preparation process, the size of a foaming space can be adjusted by adjusting the distance between the die pressing plate at the top and the die pressing plate at the bottom, so that different requirements on the size of the foaming space can be met by using the same die, the problem of cost rise caused by using multiple groups of dies is avoided, and the die cost is saved.

Then, the following steps are performed in sequence:

step S1, the vacuum insulation panel 1 is flatly laid at the bottom of the mold 4.

In step S11, a first outer frame 51 is disposed on the outer edge of the vacuum insulation panel 1.

Step S13, placing a first padding 61 for supporting the first skin 31 on the vacuum insulation panel 1.

Step S12, the first skin 31 is covered on the top of the first outer frame 51.

The structure of the assembly obtained after steps S1, S11, S13, and S12 is shown in fig. 3, fig. 3 is a schematic structural view of the outermost edge portion of the whole assembly, and fig. 3 only shows one first padding 61 symbolically, and a plurality of first padding can be placed during actual manufacturing. Referring to fig. 3, the inner wall of the first outer frame 51, the bottom of the first skin 31, and the top surface of the vacuum insulation panel 1 together define a regular foaming space, so that the foaming material 2 obtained in the subsequent foaming process is more orderly and uniform. The first padding 61 is padded between the first skin 31 and the vacuum insulation panel 1, and can provide strong support for the first skin 31, so that the problem that the middle of the first skin 31 is sunken downwards to cause uneven thickness of the composite board is solved.

Before the first spacer 61 is placed, an adhesive may be applied to both upper and lower ends of the first spacer 61. The first padding 61 coated with the adhesive can basically fix the relative positions of the vacuum insulation panel 1 and the first skin 31, so that the transverse displacement of the first skin 31 caused by the foaming stress generated in the subsequent foaming process is avoided, and the structural strength of the single-side foaming member 7 can be improved in the subsequent process of turning the single-side foaming member 7 up and down.

In the present embodiment, the first padding 61 has elasticity, and the thickness H61 of the first padding 61 is greater than the difference between the thicknesses of the first outer frame 51 and the vacuum insulation panel 1. The elastic first padding 61 can tolerate a certain dimensional tolerance, and the problems of untight abutting and excessive deformation caused by excessive dimensional deviation of the hard padding are avoided.

The thickness of the first padding 61 is slightly larger than the thickness difference between the first outer frame 51 and the vacuum insulation panel 1, so that the first padding 61 can apply certain elastic stress to the first skin 31, higher friction resistance is generated, and the stress generated in the foaming process is prevented from changing the transverse position of the first skin 31. Specifically, in the present embodiment, the thickness of the first skin 31 is 1.5mm, the thickness H51 of the first outer frame 51 is 27.5mm, and the thickness H1 of the vacuum insulation panel 1 is 8mm. The thickness H61 of the first padding 61 is 20-23mm, which is slightly larger than the thickness difference H51-H1=19.5mm between the first outer frame 51 and the vacuum heat insulation plate 1.

After step S12 is completed, performing a first foaming on the assembly shown in fig. 3, where the first foaming step is specifically: step S2, foaming is performed in a space between the upper side of the vacuum insulation panel 1 and the top of the mold 4 (specifically, below the first skin 31) in a manner of attaching one side surface of the vacuum insulation panel 1, so as to form a one-side foamed piece 7. The structure of the one-sided foamed member 7 obtained in step S2 is shown in fig. 4.

After step S2 is completed, performing:

step S34, adjusting the gap between the top of the mold 4 and the bottom of the mold 4;

and S3, turning the single-side foaming piece 7 in the step S2 up and down, and then flatly paving the single-side foaming piece at the bottom of the mold 4.

Specifically, in this embodiment, after the foam material 2 is substantially completely cured, the die plate on the top of the mold 4 is removed by using the threaded connection member, the single-sided foam material 7 is taken out and turned upside down, and then the turned single-sided foam material 7 is placed back into the mold 4 with the top-bottom gap adjusted, with the reverse side facing up and the obverse side facing down (i.e., the vacuum insulation panel 1 is located above and the foam material 2 and the first skin 31 are located below).

In the present embodiment, the same mold 4 is used in the manufacturing method flow, but in another embodiment of the present invention, the manufacturing method may be performed by using a plurality of sets of molds. In these embodiments, step S34 may be omitted, and the one-sided foamed member 7 may be directly placed in the mold bottom corresponding to the gap height.

In addition, the order of step S34 and step S3 can also be adaptively changed, and the technical solutions obtained by such adaptive adjustment will also fall within the protection scope of the present invention without departing from the gist of the present invention.

After step S3, execution continues with:

in step S31, the second frame 52 is placed on top of the first frame 51.

Step S33, a second spacer 62 for supporting the second skin 32 is placed on the vacuum insulation panel.

Step S32, the second skin 32 is covered on top of the second outer frame 52.

The assembly structure obtained after completion of step S32 is shown in fig. 5. As can be seen from fig. 5, the second padding 62 is padded between the second skin 32 and the single-sided foaming member 7, so as to provide strong support for the second skin 32, so that the second skin 32 as a whole is substantially kept horizontal during the secondary foaming process, so as to ensure the thickness consistency of the composite board.

In the present embodiment, the second spacer 62 is elastic, and the elastic second spacer 62 can allow a certain dimensional tolerance, thereby avoiding the problem that the hard spacers are not in tight contact or have an excessive amount of deformation due to an excessive dimensional deviation.

The thickness of the second padding 62 is slightly larger than that of the second outer frame 52, so that the second padding 62 can apply certain elastic stress to the second skin 32, and therefore high friction resistance is generated, and stress generated in the foaming process is prevented from changing the transverse position of the second skin 32. In the present embodiment, the thickness H62 of the second spacer 62 (shown in the figure as the amount of the second spacer 62 compressed) is 20 to 23mm, which is slightly larger than the thickness H52=19.5mm of the second outer frame 52.

In this embodiment, the enclosed composite board uses two outer frames, namely, the first outer frame 51 and the second outer frame 52, and the structure can be flexibly adapted to composite boards with different thickness requirements for the foaming materials 2 on two sides of the vacuum insulation panel 1, in other words, composite boards with different thicknesses of the foaming materials 2 on two sides can be manufactured by adjusting the thickness ratios of the first outer frame 51 and the second outer frame 52. The structure of the double-layer skin 3 can reinforce the surfaces of the two sides of the composite board, so that the abrasion resistance, the corrosion resistance and the structural strength of the composite board are improved. In addition, the second outer frame 52 and the second skin 32 can effectively define a regular foaming space for secondary foaming, so that the foaming material 2 obtained by foaming is more regular and uniform.

Preferably, the second mat 62 and the first mat 61 can be arranged in an up-and-down corresponding manner. In this preferred manner, the first mat 61 can give the second mat 62 effective support during the second foaming. Of course, in some embodiments of the present invention, the first and

second pads

61, 62 may be arranged in a staggered manner, which is not limited by the present invention.

In some embodiments of the invention, an adhesive may be applied to the upper and lower ends of the second mat 62 prior to placing the second mat 62. The second padding 62 coated with the adhesive can complete the bonding and fixing of the vacuum insulation panel 1 and the second skin 32, so that on one hand, the position of the second skin 32 can be stabilized in the foaming process, the transverse displacement of the second skin 32 caused by the foaming stress is avoided, and on the other hand, the overall structural strength of the composite board can be improved.

Finally, performing secondary foaming on the assembly shown in fig. 5, wherein the secondary foaming specifically comprises the following steps: and a step S4 of foaming the space between the upper side of the one-side foaming piece 7 and the top of the mold 4 in the step 3 in such a manner as to be attached to the other side surface of the vacuum insulation panel 1. The structure of the composite board obtained in step S4 is shown in fig. 6.

As can be seen from the above steps, in the method for manufacturing a composite board according to the present embodiment, the vacuum insulation panel 1 is substantially kept horizontal during the processing. The horizontal processing and foaming mode can be suitable for processing composite plates with large area, so that the foaming material 2 basically keeps foaming uniformly in the whole large area of the plate surface direction.

In addition, since the double single-sided foaming method of firstly foaming one side surface of the vacuum insulation panel 1 and then foaming the other side surface is adopted, the stress generated in the foaming process can be released to the upper foaming space by setting the foaming process, rather than applying force to the vacuum insulation panel 1. Through the mode, the problem that the foaming materials 2 on the two sides exert force on the middle vacuum heat insulation plate 1 to extrude and deform the middle vacuum heat insulation plate 1 can be effectively relieved or even solved.

Furthermore, the vacuum insulation panel 1 is transferred from the closed space at the bottom of the mold 4 to the open space by turning over the one-side foaming member 7, so that the other side surface of the vacuum insulation panel 1 is conveniently foamed for the second time, and the structure of the vacuum insulation panel 1 embedded with the foaming material 2 can be conveniently manufactured by the above manufacturing method.

In some embodiments of the present invention, the skin 3 may be sheet iron, fiber reinforced plastic, continuous fiber reinforced thermoplastic composite, or any other suitable material, and the foam 2 may be a urethane sheet, a polystyrene sheet, a phenolic foam sheet, a polyurethane sheet, or any other suitable foam. Preferably, the skin 3 is a continuous fiber reinforced thermoplastic composite material, the continuous fiber reinforced thermoplastic composite material has high tensile strength and impact strength and small surface density, has an obvious weight reduction effect compared with an iron sheet, is good in acid resistance, alkali resistance and elasticity, is not easy to generate plastic deformation, and is environment-friendly and recyclable. In addition, the elastic modulus of the continuous fiber reinforced thermoplastic composite material is slightly lower than that of an iron sheet, the deformation amount of the continuous fiber reinforced thermoplastic composite material is slightly larger than that of the iron sheet under external force, the plate can be immediately restored after the external force is relieved, and the integral bearing performance of the composite plate is superior to that of a composite plate using the iron sheet as a skin by matching with a small-distance underframe for supporting.

Preferably, the foamed material 2 is a polyurethane board, and the polyurethane board is further excellent in strength, fire resistance and heat insulation performance. The skin 3 and the foam material 2 which are formed by the preferable materials can meet the material performance requirements of each layer, and the interfaces among the skin 3, the foam material 2 and the vacuum heat-insulating plate 1 can be conveniently bonded due to similar material properties, so that the whole structure is more compact. More preferably, a polyurethane foam is used for the first spacer 61, the second spacer 62, and the foam 2. The padding and the foaming material 2 made of the same material are used, so that the overall performance parameters of the foaming material 2 and the padding are kept consistent, the binding force between the same materials is tighter, and the overall structural strength is excellent. The foaming process of the polyurethane can adopt the foaming conditions in the prior art, and the invention is not limited to this, and is not described herein again.

In addition, it should be noted that the numerical references in the terms "S1", "S2" and "S11" are only exemplary for distinguishing different steps, and do not limit the order of the steps or the inclusion relationship of the steps.

In some embodiments of the invention, the total thickness of the composite board is 20 to 50mm. The total thickness of the composite board is not too thick or too thin, the too thick composite board can cause too large weight, is not beneficial to transportation and can occupy storage space, and the heat insulation performance of the too thin composite board is difficult to ensure or the structural strength is difficult to meet the requirement. By adopting the composite board within the thickness range, the requirements of the composite board on strength, heat insulation performance and surface density can be further effectively considered.

The thickness of the vacuum insulation panel 1 is not too thick or too thin, the cost of the excessively thick vacuum insulation panel 1 is high, the weight of the excessively thin vacuum insulation panel 1 is large, the requirement of the heat insulation performance or the strength of the excessively thin vacuum insulation panel 1 is difficult to meet, and the requirements of the cost, the weight and the heat insulation performance can be met by adopting the vacuum insulation panel 1 with the thickness of 5-10 mm. In this embodiment, a vacuum insulation panel 1 having a thickness of 8mm is used.

In addition, the excessively thick skin 3 has a heavy weight and poor toughness, while the excessively thin skin 3 is not convenient to form strong protection for the foam material 2 or the vacuum insulation panel 1, and the skin 3 with the thickness of 1-2mm can meet the requirements of toughness and hardness. In this embodiment, a glass fiber reinforced plastic (fiber reinforced plastic) skin having a thickness of 1.5mm is used.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The manufacturing method of the composite board is characterized by comprising the following steps:

s1, flatly paving a vacuum heat insulation plate at the bottom of a mould;

s11, arranging a first outer frame on the outer edge of the vacuum heat-insulating plate;

s12, covering a first skin on the top of the first outer frame;

s13, placing a first padding for supporting a first skin on the vacuum insulation panel;

after step S2 is completed, performing:

s34, adjusting a gap between the top of the mold and the bottom of the mold;

s3, turning the single-side foaming piece in the step S2 up and down and then tiling the single-side foaming piece at the bottom of the mold;

s4, foaming in a mode of attaching the other side surface of the vacuum heat insulation plate to the space between the upper portion of the single-side foaming piece and the top of the mold in the step S3, wherein the first padding has elasticity, the thickness of the first padding is larger than the thickness difference between the first outer frame and the vacuum heat insulation plate, the two ends of the first padding are coated with adhesives, and the step S2 and the step S4 are foamed by using the same mold.

2. The method of manufacturing a composite board according to claim 1, further comprising, after step S3 and before step S4:

s31, arranging a second outer frame on the top of the first outer frame;

and S32, covering a second skin on the top of the second outer frame.

3. The method of manufacturing a composite board according to claim 2, further comprising, after step S31 and before step S32:

and S33, placing a second padding for supporting a second skin on the vacuum insulation panel.

4. The method of manufacturing a composite panel as defined in claim 3, wherein said second mat is resilient and has a thickness greater than a thickness of said second outer frame.

5. A method of manufacturing a composite sheet material as claimed in claim 4, in which the second mat is coated at both ends with an adhesive.

6. A method of manufacturing a composite board as claimed in any one of claims 1 to 5, wherein the method is used to manufacture a composite board having an area of 2m2 or more.

7. The method of manufacturing a composite panel according to any one of claims 3 to 5, wherein the first spacer is made of the same material as the foam material of one surface of the vacuum insulation panel, and the second spacer is made of the same material as the foam material of the other surface of the vacuum insulation panel.

8. The method of manufacturing a composite board according to claim 7, wherein the first spacer, the second spacer, and the foam material are made of polyurethane.