Novel fiber-added sandwich composite material plate

Abstract

The invention discloses a novel fiber-added sandwich composite material plate which comprises a PET foaming core, an upper skin and a lower skin, the upper skin is attached to the upper end of the PET foaming core, when the novel fiber-added sandwich composite material plate is used, the cut PET foaming core, the upper skin and the lower skin enter a Teflon belt compound machine together, the PET foaming core is laid on the lower skin, and the lower skin is attached to the upper skin. The PET foaming core layer is taken into a compound machine along with the operation of a Teflon belt conveyor, upper and lower skins are melted in the heating process of a heating section, the upper and lower skins are pressed and pasted on the upper and lower surfaces of the PET foaming core layer through a pressing area, then the PET foaming core layer enters a cooling section to be subjected to curing and pressing forming, the skins can be continuously unwound, and the honeycomb core is continuously laid and attached to the machine; and at the cutting part, the virtual edge of the edge part is longitudinally cut, the cutting size is set through a meter counter for metering, automatic cutting operation is carried out when the cutting size reaches the set size, and finally, the novel fiber-added sandwich composite material plate is cut into the required specified size of length, width and thickness, so that the novel fiber-added sandwich composite material plate is finished.

Description

Technical Field

[0001] The invention relates to the technical field related to decoration flat plate materials, in particular to a novel fiber-reinforced sandwich composite material plate. Background Art

[0002] The commonly used board materials on the market mainly include gypsum, plywood, bamboo plywood, wood, metal alloys, plastics, etc. Although these materials have their own advantages, they also have some obvious defects and shortcomings. There are many varieties of boards on the market, which are suitable for various scenarios and can be processed into various supporting materials, decorative materials, flat paving materials, etc. The following is a description of the advantages and disadvantages of various types of boards. Gypsum board and plywood are light in weight, easy to cut and install, but have low strength and are easily affected by moisture. After being affected by moisture, they will fail to function; wooden boards are light in weight, easy to process and install, but they are easy to crack, easy to get damp, moldy, and rot during use; metal alloy boards have strong rigidity, high strength, and are strong and wear-resistant, but due to their high cost, high density, heavy weight, and difficult installation and drilling, they cannot be used for decorative ceilings, have poor decorative properties, and cannot achieve poor insulation effects; plastic boards are light in weight, easy to transport and install, but they are easy to discolor, deform, and are not durable The thermal performance is poor, and most of them are not flame retardant; the boards made of stone are rigid, have good wear resistance, and good stability, but they are bulky, easy to break, difficult to process, poor decorative properties, and poor thermal insulation effects; glass boards have good rigidity and good aging resistance, but they are fragile and difficult to process and fix and install. They are bulky for photovoltaic products and require fixed brackets for support. The production cost is high and the installation is inconvenient. The currently mature thermoplastic continuous fiber reinforced sandwich boards (sandwich composite boards) have a hollow honeycomb tubular core material. The boards cannot be effectively fixed during processing and use, or the fixing riveting force is too small. This results in the composite board being unable to be widely used in various fields and can only be used as ordinary floors or on objects with small riveting force and relatively static, or as an intermediate layer. Therefore, we need a new type of fiber-reinforced sandwich composite board.

[0003] However, the currently used panels have the problems of long production cycle, complex processing, low production efficiency, poor thermal insulation performance, poor flatness, and poor thermal insulation effect. In addition, they are not light weight, flame retardant, and are not easy to transport, process, and install. Summary of the invention

[0004] The purpose of the present invention is to provide a novel fiber-reinforced sandwich composite material plate to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A novel fiber-reinforced sandwich composite material plate comprises a PET foam core, an upper skin and a lower skin, wherein the upper end of the PET foam core is bonded with the upper skin, and the lower end of the PET foam core is bonded with the lower skin.

[0007] Preferably, the upper skin and the lower skin are made of a thermoplastic glass fiber composite material, including glass fibers and PET resin, and the PET resin is impregnated on the fully expanded glass fibers.

[0008] A method for manufacturing a novel fiber-reinforced sandwich composite material plate comprises the following steps:

[0009] S1. Produce the unidirectional tape required for the upper and lower skins. The thickness of the unidirectional tape is in the range of 0.15 to 0.3 mm / layer. Then use the composite equipment to produce the multi-layer unidirectional tape skin. The composite is 2 layers or more, and the structure needs to be symmetrical.

[0010] S2. Prepare the intermediate PET foam core by melt extrusion or co-blending injection molding. The melt extrusion method is to mix PET and PE and heat them to a molten state, then extrude them into a film through an extruder, and then break the PET molecular chain and form bubbles through cooling and stretching to obtain a foam material. The weight of the PET foam core can be customized according to customer needs and can range from 80 to 160 kg / m 3 Switch production at will. The molded foam is pressurized and cured using specific glue and a press to form a rectangular block, which is then cut according to the customer's different thickness requirements.

[0011] S3. The cut PET foam core and the upper and lower skins are then fed into the Teflon belt laminating machine together. The PET foam core is laid on the lower skin and brought into the laminating machine along with the operation of the Teflon belt conveyor. During the heating process in the heating section, the upper and lower skins are melted, and the upper and lower skins are pressurized and pasted on the upper and lower surfaces of the PET foam core through the pressurized area. Then, the cores enter the cooling section for curing and pressurization molding. The finished product is a middle core material with upper and lower skins bonded together.

[0012] S4. Finally, the cut PET foam core material is compounded with the upper and lower skins through a compounding machine to form a finished board product. During the production, the skin can be continuously unrolled, and the PET foam core is continuously laid. The sheets are closely connected to each other and fed into the machine. After the finished product is produced, the virtual edges of the edges are longitudinally cut, and the cutting size is set by a meter. When the set size is reached, the cutting operation is automatically carried out, and finally it is cut into the required length, width and thickness specified size.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The board adopts PET foam core, upper skin and lower skin. The board has high processing efficiency and no noise during production. The cutting debris and processing waste gas in production will be collected by bags and dust removal devices. It has good heat insulation and sound insulation performance. Since the foam core board is a solid foam board, it can be punched and riveted quickly and easily. It is also light in weight, strong in rigidity, flame retardant, easy to transport, and convenient to process and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of a novel fiber-reinforced sandwich composite material plate of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of a novel fiber-reinforced sandwich composite material plate of the present invention;

[0017] Figure 3 It is a structural schematic diagram of a method for manufacturing a novel fiber-reinforced sandwich composite material plate of the present invention.

[0018] In the figure: 1, PET foam core; 2, upper skin; 201, glass fiber; 202, PET resin; 3, lower skin. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0020] See also Figure 1-3 The present invention provides a new fiber-reinforced sandwich composite material board technical solution:

[0021] A novel fiber-reinforced sandwich composite material plate comprises a PET foam core 1, an upper skin 2 and a lower skin 3. The upper end of the PET foam core 1 is bonded with the upper skin 2, and the lower end of the PET foam core 1 is bonded with the lower skin 3.

[0022] The upper skin 2 and the lower skin 3 are made of a thermoplastic glass fiber composite material, including glass fibers 201 and PET resin 202 , and the PET resin 202 is impregnated on the fully expanded glass fibers 201 .

[0023] A method for manufacturing a novel fiber-reinforced sandwich composite material plate comprises the following steps:.

[0024] S1. Produce the unidirectional tape required for the upper skin 2 and the lower skin 3. The thickness of the unidirectional tape is in the range of 0.15 to 0.3 mm / layer. Then use the composite equipment to produce the multi-layer unidirectional tape surface composite. The composite is 2 layers or more, and the structure needs to be symmetrical.

[0025] S2. The intermediate PET foam core 1 is prepared by melt extrusion or co-injection molding. The melt extrusion method is to mix PET and PE and heat them to a molten state, and then extrude them into a film through an extruder, and then cool and stretch the PET molecular chain to break and form bubbles, thereby obtaining a foaming material. The weight of the PET foam core 1 can be customized according to customer needs and can be from 80 to 160 kg / m 3 Switch production at will. The molded foam is pressurized and cured using specific glue and a press to form a rectangular block, which is then cut according to the customer's different thickness requirements.

[0026] S3. The cut PET foam core 1, the upper skin 2 and the lower skin 3 are then put into the Teflon belt laminating machine together. The PET foam core 1 is laid on the lower skin 3 and brought into the laminating machine along with the operation of the Teflon belt conveyor. During the heating process in the heating section, the upper skin 2 and the lower skin 3 are melted, and the upper and lower skins are pressurized and pasted on the upper and lower surfaces of the PET foam core 1 through the pressurized area. Then, they enter the cooling section for curing and pressurized molding. The molded finished product is a middle core material with upper and lower skins bonded together.

[0027] S4. Finally, the cut PET foam core 1 sheet is compounded with the upper skin 2 and the lower skin 3 through a compounding machine to form a finished board product. The production operation is continuous during production, the skin can be continuously unrolled, and the PET foam core 1 is continuously laid, and the sheets are closely fed into the machine. After the finished product is produced, the virtual edges of the edges are longitudinally cut, and the cutting size is set by a meter meter. When the set size is reached, the cutting operation is automatically carried out, and finally it is cut into the required length, width and thickness specified size.

[0028] It should be noted that the present invention is a novel fiber-reinforced sandwich composite material sheet. When the sheet is manufactured, the glass fiber 201 is fully expanded, and the molten PET resin 202 is impregnated on the fully expanded glass fiber 201 by using the upper and lower extrusion mold equipment. After passing through the secondary impregnation device, the upper and lower rollers are pressed and formed to form a sheet-like unidirectional tape. After cooling and forming, it is rolled up, and the rolled unidirectional tape is cut into transverse materials. The unidirectional tape is cross-stacked at 0° and 90°, and enters the composite machine to synthesize two or more layers of skin, and the unidirectional tape required for the upper skin 2 and the lower skin 3 is rolled up. The unidirectional tape is produced, and the thickness range of the unidirectional tape is 0.15-0.3mm / layer. Then, the multi-layer unidirectional tape skin is composited by composite equipment. The composite has 2 or more layers, and the structure needs to be symmetrical. The middle PET foam core 1 is prepared by melt extrusion or co-blending injection molding. The melt extrusion method is to mix PET and PE and heat them to a molten state, and then extrude them into a film through an extruder. Then, the PET molecular chain is broken by cooling and stretching to form bubbles, thereby obtaining a foaming material. The gram weight of the PET foam core 1 can be customized according to customer needs and can be from 80 to 160kg / m 3 The production can be switched at will. The foam after production is pressurized and cured with a specific glue and a press to form a rectangular block. Then it is cut according to the different thickness requirements of the customer. The cut PET foam core 1, the upper skin 2 and the lower skin 3 are put into the Teflon belt laminating machine together. The PET foam core 1 is laid on the lower skin 3 and brought into the laminating machine along with the operation of the Teflon belt conveyor. During the heating process in the heating section, the upper skin 2 and the lower skin 3 are melted. Through the pressurized area, the upper and lower skins are pressurized and pasted on the upper and lower surfaces of the PET foam core 1, and then enter the cooling section for curing. Pressurized molding, the finished product is the upper and lower skins bonded with the middle core material, and finally the cut PET foam core 1 sheet is compounded with the upper skin 2 and the lower skin 3 through a compounding machine to make a finished board product. Continuous production operation is carried out during production, the skin can be continuously unrolled, and the PET foam core 1 is continuously laid, and the sheets are closely fed into the machine. After the finished product is produced, the virtual edges of the edges are longitudinally cut, and the cutting size is set by a meter meter. When the set size is reached, the cutting operation is automatically carried out, and finally it is cut into the required length, width and thickness specified size. In this way, a new type of fiber-reinforced sandwich composite material board is completed.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of fiber-reinforced sandwich composite material plate, characterized by: It comprises a PET foam core (1), an upper skin (2) and a lower skin (3), wherein the upper end of the PET foam core (1) is bonded to the upper skin (2), and the lower end of the PET foam core (1) is bonded to the lower skin (3).

2. The novel fiber-reinforced sandwich composite material sheet according to claim 1, characterized in that: The upper skin (2) and the lower skin (3) are made of a thermoplastic glass fiber composite material, including glass fibers (201) and PET resin (202), wherein the PET resin (202) is impregnated on the fully expanded glass fibers (201).

3. A method for manufacturing a novel fiber-reinforced sandwich composite material sheet, characterized in that: The following steps are involved: S1. The unidirectional tape required for the upper skin (2) and the lower skin (3) is produced. The thickness of the unidirectional tape is in the range of 0.15 to 0.3 mm / layer. Then, the multi-layer unidirectional tape is composited with 2 or more layers through a composite device. The structure needs to be symmetrical. S2. The intermediate PET foam core (1) is prepared by melt extrusion or co-injection molding. The melt extrusion method is to mix PET and PE and heat them to a molten state, and then extrude them into a film through an extruder, and then cool and stretch the PET molecular chains to break and form bubbles, thereby obtaining a foaming material. The gram weight of the PET foam core (1) can be customized according to customer needs and can be from 80 to 160 kg / m 3 Switch production at will. The molded foam is pressurized and cured using specific glue and a press to form a rectangular block, which is then cut according to the customer's different thickness requirements. S3. The cut PET foam core (1), the upper skin (2) and the lower skin (3) are then put into the Teflon belt laminating machine. The PET foam core (1) is laid on the lower skin (3) and brought into the laminating machine along with the operation of the Teflon belt conveyor. During the heating process in the heating section, the upper skin (2) and the lower skin (3) are melted. The upper and lower skins are pressurized and glued to the upper and lower surfaces of the PET foam core (1) through the pressurized area. The cores then enter the cooling section for curing and pressurization molding. The molded product is a middle core material with upper and lower skins bonded together. S4. Finally, the cut PET foam core (1) sheet is compounded with the upper skin (2) and the lower skin (3) through a compounding machine to produce a finished board product. During the production, the skin can be continuously unrolled, and the PET foam core (1) is continuously laid, with each sheet feeding the machine close to the other. After the finished product is produced, the virtual edge of the edge is longitudinally cut, and the cutting size is set by a meter. When the set size is reached, the cutting operation is automatically carried out, and finally it is cut into the required length, width and thickness specified size.

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