Fire-resistant acrylic sheet and manufacturing method thereof

Abstract

The present invention aims to provide a fire-resistant acrylic board and a manufacturing method thereof, which includes a composite acrylic board and a flame retardant component, wherein a central groove and two side grooves are provided in the composite acrylic board, the two side grooves are respectively located on both sides of the central groove, the top ends of the central groove and the two side grooves are connected to each other, and the bottom ends of the central groove and the two side grooves are independent of each other, the flame retardant component includes a flame retardant seat, a hot melt ball, a mixing release component and a spray release component, the flame retardant seat is provided with a pressure relief pipe and a spray pipe, a pressure chamber, a first material chamber and a second material chamber are provided in the flame retardant seat, the pressure chamber is connected to the pressure relief pipe, the second material chamber and the spray pipe are both connected to the first material chamber, the flame retardant seat is plugged into the bottom end of the composite acrylic board to connect the pressure relief pipe with the side grooves, and the spray pipe is connected to the central groove, the hot melt ball is provided in the pressure relief pipe, the mixing release component and the spray release component are both provided in the pressure chamber, the mixing release component is used to seal the second material chamber and the first material chamber, and the spray release component is used to seal the spray pipe and the first material chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of acrylic sheets, in particular to a fireproof acrylic sheet and a manufacturing method thereof. Background Art

[0002] Acrylic sheet, also known as plexiglass, is a transparent organic material made from the polymerization of methyl methacrylate (MMA). Due to its high transparency and gloss, good weather resistance and chemical stability, easy processing and molding, light weight, and high impact strength, acrylic sheet is widely used in the construction, advertising, and transportation industries.

[0003] In order to improve the fire resistance of acrylic, there are mainly three existing methods. The first is to add flame retardants to improve the fire resistance of acrylic boards. The second is to improve the fire resistance of acrylic boards by applying a flame retardant layer on the surface. The third is to improve the fire resistance of acrylic boards by changing the structure of the acrylic boards and adding a flame retardant structure. For example, Chinese patent document No. CN116728923A discloses a high-strength flame retardant acrylic board, which includes a pair of acrylic board bodies, a strip gap is provided between the pair of acrylic board bodies, a pair of side reinforcing plates are connected between the pair of acrylic board bodies, and the side reinforcing plates include a base plate, a fixed connection on the base plate. A leak plate is connected, which has multiple leak holes, and a hot-melt film is laid on the outer wall of the leak plate; a reinforced seal is provided between a pair of acrylic plate bodies, and a sealing strip is connected between the reinforced seal and the acrylic plate body, and the sealing strip and the reinforced seal are bonded by heat-conducting flame-retardant sealant, and the heat-conducting flame-retardant sealant extends into the sealing strip and the reinforced seal; the reinforced seal includes a pair of card strips, and a plurality of sealing balls are clamped between the pair of card strips; a plurality of hemispherical grooves matching the sealing balls are provided on the card strip, and two through holes communicating with the hemispherical grooves are provided on the card strip, and the two through holes intersect; flame-retardant particles are filled in the side reinforcing plate or the sealing ball; the flame-retardant particles include epp flame-retardant masterbatch and quartz sand. In this way, when the entire board is in an overly high temperature environment, an effective flame retardant layer is quickly formed in the composite acrylic board to achieve flame retardancy of the board. It is easy to achieve when using acrylic boards with low flame retardant additions to construct composite boards, which can ensure the flame retardant and fireproof effect of the composite boards, and the equipment for strengthening the seal can easily further improve the overall strength of the composite boards.

[0004] However, existing flame-retardant acrylic sheets have the following technical drawbacks: while flame-retardant particles are filled into the strip-shaped gaps to form a flame-retardant layer within the acrylic sheet body, this does not alter the flame-retardant properties of the outer surface of the acrylic sheet body. This means that the outer wall of the acrylic sheet body will still be burned by high temperatures, causing the EPP flame-retardant masterbatch and quartz sand within the strip-shaped gaps to flow out, thus causing the flame-retardant layer to disappear and the flame-retardant function to be lost. Therefore, to achieve flame retardancy by modifying the structure of acrylic sheets, the present invention proposes a fire-retardant acrylic sheet and a method for manufacturing the same. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a fire-resistant acrylic plate and a manufacturing method thereof, which is fire-resistant by changing the structure of the acrylic plate.

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] A fire-resistant acrylic board, comprising:

[0008] A composite acrylic plate, wherein the composite acrylic plate has a central groove and two side grooves, the two side grooves are respectively located on either side of the central groove, the top ends of the central groove and the two side grooves are interconnected, and the bottom ends of the central groove and the two side grooves are independent of each other; and

[0009] A flame retardant assembly, the flame retardant assembly includes a flame retardant seat, a hot melt ball, a mixing release piece and a spray release piece, the flame retardant seat is provided with a pressure relief pipe and a spray pipe, a pressure chamber, a first material chamber and a second material chamber are opened in the flame retardant seat, the first material chamber and the second material chamber are both used to contain flame retardants, the pressure chamber is connected to the pressure relief pipe, the second material chamber and the spray pipe are both connected to the first material chamber, the flame retardant seat is inserted into the bottom end of the composite acrylic plate so that the pressure relief pipe is connected to the two side grooves and the spray pipe is connected to the central groove, the hot melt ball is arranged in the pressure relief pipe to seal the pressure relief pipe and the side groove, the mixing release piece and the spray release piece are both arranged in the pressure chamber, the mixing release piece also extends between the second material chamber and the first material chamber to seal the second material chamber and the first material chamber, and the spray release piece also extends between the spray pipe and the first material chamber to seal the spray pipe and the first material chamber.

[0010] Optionally, the composite acrylic panel includes a bottom panel, a top panel, two side panels and four panel bodies, the four panel bodies are stacked at intervals, and the bottom ends of the four panel bodies are connected to the bottom panel, the top ends of the four panel bodies are connected to the top panel, and the two sides of the four panel bodies are respectively connected to the two side panels, so that the central groove and the two side grooves are formed between the four panel bodies.

[0011] Optionally, a plurality of spaced-apart air-avoiding grooves are provided at the top ends of the two inner plates, so that the central groove and the side grooves are connected through the space-avoiding grooves.

[0012] Optionally, a mounting groove is provided on a side surface of the bottom plate away from the plate body, and the flame retardant seat is inserted into the mounting groove.

[0013] Optionally, a plurality of slots are provided on the inner bottom wall of the installation groove, and a plurality of flame-retardant seats are provided, and each flame-retardant seat is plugged into each slot in a one-to-one correspondence.

[0014] Optionally, a first through hole and a second through hole are further provided on the inner bottom wall of the slot, the first through hole is connected to the center slot, and the second through hole is connected to the side slot. When the flame retardant seat is inserted into the slot, the spray pipe is inserted into the first through hole, and the pressure relief pipe is inserted into the second through hole.

[0015] Optionally, there are two second through holes, the two second through holes are respectively connected to the two side grooves, and two pressure relief pipes are provided, the two pressure relief pipes are used to be respectively inserted into the two second through holes.

[0016] Optionally, the mixing release member includes a sealing pin, a spring and a sealing ring, the sealing pin is inserted into the flame retardant seat so that one end of the sealing pin is located in the pressure chamber, and the other end of the sealing pin extends between the second material chamber and the first material chamber. An air outlet is provided on the axis of the sealing pin, and a conducting groove is provided on the outer wall of the sealing pin. The spring is sleeved on the outer wall of the sealing pin, and the spring is respectively in contact with the sealing pin and the inner wall of the pressure chamber. The sealing ring is sleeved on one end of the sealing pin located in the pressure chamber. When the air pressure in the pressure chamber increases, the air pressure will push the sealing pin so that the sealing ring closes the air outlet and the pressure chamber, and the conducting groove is not connected with the second material chamber and the first material chamber. When the air pressure in the pressure chamber drops, the spring pushes the sealing pin so that the air outlet is connected with the pressure chamber, and the conducting groove is respectively connected with the second material chamber and the first material chamber.

[0017] Optionally, the structure of the material spraying release member is equivalent to that of the material mixing release member, and the sealing pin in the material spraying drive member is used to extend between the material spraying pipe and the first material cavity.

[0018] A method for manufacturing a fire-resistant acrylic sheet comprises the following steps:

[0019] Step S10: Obtain a composite acrylic sheet, wherein the composite acrylic sheet has a central groove and two side grooves, the two side grooves are located on either side of the central groove, the tops of the central groove and the two side grooves are connected to each other, and the bottoms of the central groove and the two side grooves are independent of each other;

[0020] Step S20: Obtain a flame retardant assembly, wherein the flame retardant assembly includes a flame retardant seat, a hot melt ball, a mixing release member, and a spray release member; the flame retardant seat is provided with a pressure relief pipe and a spray pipe; a pressure chamber, a first material chamber, and a second material chamber are defined within the flame retardant seat; the pressure chamber is communicated with the pressure relief pipe; the second material chamber and the spray pipe are both communicated with the first material chamber; the hot melt ball is disposed within the pressure relief pipe to seal the pressure relief pipe; the mixing release member and the spray release member are both disposed within the pressure chamber; the mixing release member further extends between the second material chamber and the first material chamber; and the spray release member further extends between the spray pipe and the first material chamber.

[0021] Step S30: Filling the pressure chamber with nitrogen at 1.2 MPa to 1.5 MPa, so that the mixing release member seals the second material chamber and the first material chamber, and the spray release member seals the spray pipe and the first material chamber;

[0022] Step S40: injecting flame retardant into the first cavity and the second cavity respectively;

[0023] Step S50: insert the flame retardant seat into the bottom end of the composite acrylic plate so that the pressure relief pipe is connected to the two side grooves and the spray pipe is connected to the central groove to obtain a fire-resistant acrylic plate.

[0024] Compared with the prior art, the present invention has at least the following advantages:

[0025] When the fire-retardant acrylic sheet is exposed to a fire source, the heat will make its outer wall surface more susceptible to heat deformation or even burning. Therefore, the temperature of the two side grooves of the composite acrylic sheet will increase first. As the temperature of the side grooves increases, the hot melt ball in the pressure relief pipe will melt due to the heat, causing the high-pressure gas in the pressure chamber to be released from the pressure relief pipe to the outside. As the air pressure in the pressure chamber decreases, the air pressure can no longer act on the mixing release member and the spray release member, causing the mixing release member to connect the second material chamber with the first material chamber, allowing the aluminum sulfate solution and the sodium bicarbonate solution to react in the first material chamber to produce a large amount of foam. Then the spray release member connects the spray pipe with the first material chamber, allowing the foam to spread from the bottom end of the spray pipe to the central groove, and finally spread from the top of the central groove to the side grooves on both sides, and cover the inner walls of the side grooves. In this way, compared with the existing fire-proof structure, the fire-retardant acrylic sheet of the present application can coat the fire-proof material on the surface of the composite acrylic sheet, effectively achieving the purpose of fire retardancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the structure of a fire-retardant acrylic plate according to one embodiment of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the partial structure of the fire-retardant acrylic board shown;

[0029] Figure 3 This is a schematic structural diagram of a flame retardant assembly according to one embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the cross-sectional structure of a composite acrylic plate according to one embodiment of the present invention;

[0031] Figure 5 for Figure 1 Schematic diagram of the partial cross-sectional structure of the fire-retardant acrylic plate shown;

[0032] Figure 6 for Figure 1 A schematic diagram of a partial cross-sectional structure of a fire-retardant acrylic plate at another angle shown;

[0033] Figure 7 for Figure 3 A schematic cross-sectional view of the flame retardant assembly shown;

[0034] Figure 8 for Figure 4 Schematic diagram of the partial structure of the composite acrylic plate shown;

[0035] Figure 9 for Figure 3 A schematic cross-sectional view of the flame retardant assembly from another angle;

[0036] Figure 10 for Figure 3 A schematic cross-sectional view of the flame retardant assembly at another angle;

[0037] Figure 11 Schematic diagram of the cross-sectional structure of a mixed material release member according to one embodiment of the present invention;

[0038] Figure 12 Schematic diagram of the cross-sectional structure of a spray material release member according to one embodiment of the present invention;

[0039] Figure 13 This is a flow chart of a method for producing a fire-retardant acrylic sheet according to one embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 10. Fire-retardant acrylic sheet; 100. Composite acrylic sheet; 200. Flame-retardant component; 141. Center groove; 142. Side groove; 210. Flame-retardant seat; 220. Hot-melt ball; 230. Mixing release piece; 240. Spraying release piece; 250. Pressure relief pipe; 260. Spraying pipe; 211. Pressure chamber; 212. First material chamber; 213. Second material chamber; 110. Bottom plate; 120. Top plate; 130. Side plate; 140. Plate body; 143. Air avoidance groove; 111. Mounting groove; 112. Slot; 113. First through hole; 114. Second through hole; 231. Sealing pin; 232. Spring; 233. Sealing ring; 2311. Air outlet; 2312. Conducting groove. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0043] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0045] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0046] In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown.

[0047] like Figures 1 to 7 As shown, a fire-retardant acrylic plate 10 includes a composite acrylic plate 100 and a flame retardant component 200. A central groove 141 and two side grooves 142 are provided in the composite acrylic plate 100. The two side grooves 142 are respectively located on both sides of the central groove 141. The top ends of the central groove 141 and the two side grooves 142 are connected to each other, and the bottom ends of the central groove 141 and the two side grooves 142 are independent of each other. The flame retardant component 200 includes a flame retardant seat 210, a hot melt ball 220, a mixing release member 230 and a spray release member 240. A pressure relief pipe 250 and a spray pipe 260 are provided on the flame retardant seat 210. A pressure chamber 211, a first material chamber 212 and a second material chamber 213 are provided in the flame retardant seat 210. The first material chamber 212 and the second material chamber 213 are both used to accommodate flame retardants. The pressure chamber 211 is connected to the pressure relief pipe 250, the second material chamber 213 and the spray pipe 260 are both connected to the first material chamber 212, the flame retardant seat 210 is inserted into the bottom end of the composite acrylic plate 100 to connect the pressure relief pipe 250 with the two side grooves 142, and the spray pipe 260 is connected to the central groove 141, the hot melt ball 220 is arranged in the pressure relief pipe 250 to seal the pressure relief pipe 250 and the side grooves 142, the mixing release member 230 and the spray release member 240 are both arranged in the pressure chamber 211, the mixing release member 230 also extends between the second material chamber 213 and the first material chamber 212 to seal the second material chamber 213 and the first material chamber 212, and the spray release member 240 also extends between the spray pipe 260 and the first material chamber 212 to seal the spray pipe 260 and the first material chamber 212.

[0048] It should be noted that the two side grooves 142 within the composite acrylic sheet 100 are located on either side of the central groove 141. The top ends of the central groove 141 and the two side grooves 142 are interconnected, while the bottom ends are independent. Furthermore, a pressure chamber 211, a first material chamber 212, and a second material chamber 213 are defined within the flame retardant seat 210. The pressure chamber 211 is connected to the pressure relief pipe 250. The second material chamber 213 and the injection pipe 260 are both connected to the first material chamber 212. When the flame retardant seat 210 is plugged into the bottom end of the composite acrylic sheet 100, the pressure relief pipe 250 is connected to the two side grooves 142, while the injection pipe 260 is connected to the central groove 141. A hot melt ball 220 is installed in the pressure relief pipe 250, which blocks the pressure relief pipe 250, thereby disconnecting the side grooves 142 from the pressure chamber 211. In one embodiment, the hot melt ball 220 is made of paraffin wax, which melts when heated. Furthermore, one end of the mixing release member 230 is located within the pressure chamber 211, and the other end extends between the second chamber 213 and the first chamber 212. The mixing release member 230 is used to close or open the passage between the second chamber 213 and the first chamber 212. It should be noted that both the second chamber 213 and the first chamber 212 are used to hold flame retardants. For example, the second chamber 213 can hold an aluminum sulfate solution, while the first chamber 212 can hold a sodium bicarbonate solution. Thus, the mixing release member 230 controls the connection between the second chamber 213 and the first chamber 212. When closed, the flame retardants are isolated from each other and do not chemically react. When connected, the aluminum sulfate solution in the second chamber 213 flows into the sodium bicarbonate solution in the first chamber 212, causing a chemical reaction and generating a large amount of foam. Furthermore, one end of the spray release member 240 is located in the pressure chamber 211, and the other end of the spray release member 240 extends between the spray pipe 260 and the first material chamber 212. The spray release member 240 is used to control the connection or closure between the spray pipe 260 and the first material chamber 212. When closed, the foam in the first material chamber 212 cannot be sprayed out from the spray pipe 260. When connected, the foam in the first material chamber 212 will be sprayed out along the spray pipe 260, thereby entering the central groove 141 from the bottom of the central groove 141. Since the central groove 141 and the side groove 142 are connected at the top, the foam will spread from the bottom of the central groove 141 to the top, and spread from the position where the central groove 141 and the side groove 142 are connected at the top to the two side grooves 142, so that the foam covers the side wall of the side groove 142 close to the central groove 141, so that the composite acrylic plate 100 has good isolation and flame retardant properties.It should be noted that the pressure chamber 211 is used to inject high-pressure gas. The high-pressure gas causes the mixing release member 230 to close the passage between the second material chamber 213 and the first material chamber 212, and at the same time causes the spray release member 240 to close the passage between the spray pipe 260 and the first material chamber 212. When the fire-resistant acrylic plate 10 is facing a fire source, the heat causes its outer wall surface to be more susceptible to heat deformation or even burning. Therefore, the temperature of the two side grooves 142 of the composite acrylic plate 100 will first increase. As the temperature of the side grooves 142 increases, the hot melt ball 220 in the pressure relief pipe 250 is heated and melted, causing the high-pressure gas in the pressure chamber 211 to be released from the pressure relief pipe 250 to the outside. As the air pressure in the pressure chamber 211 decreases, the air pressure can no longer continue to The mixing release member 230 and the spray release member 240 work so that the mixing release member 230 connects the second material chamber 213 with the first material chamber 212, so that the aluminum sulfate solution and the sodium bicarbonate solution react in the first material chamber 212 to produce a large amount of foam. Then the spray release member 240 connects the spray pipe 260 with the first material chamber 212, so that the foam spreads from the bottom end to the central groove 141 along the spray pipe 260, and finally spreads from the top of the central groove 141 to the side grooves 142 on both sides, and covers the inner side walls of the side grooves 142. In this way, compared with the existing fireproof structure, the fireproof acrylic panel 10 of the present application can coat the fireproof material on the surface of the composite acrylic panel 100, effectively achieving the purpose of fire retardancy.

[0049] like Figure 4 and Figure 8 As shown, in one embodiment, the composite acrylic panel 100 includes a bottom panel 110, a top panel 120, two side panels 130 and four panel bodies 140. The four panel bodies 140 are stacked at intervals, and the bottom ends of the four panel bodies 140 are connected to the bottom panel 110, the top ends of the four panel bodies 140 are connected to the top panel 120, and the two sides of the four panel bodies 140 are respectively connected to the two side panels 130, so that a central groove 141 and two side grooves 142 are formed between the four panel bodies 140.

[0050] It should be noted that the four plates 140 are spaced apart, forming three gaps between them: a central groove 141 located in the center, and side grooves 142 located on either side of the central groove 141. Furthermore, the four plates 140 are fixedly connected to form the composite acrylic panel 100 via the bottom plate 110, top plate 120, and two side plates 130. In one embodiment, the bottom plate 110, top plate 120, two side plates 130, and four plates 140 are bonded and fixed together using glue.

[0051] like Figure 8 As shown, in one embodiment, the top ends of the two inner plates 140 are each provided with a plurality of spaced-apart avoidance grooves 143 , so that the central groove 141 and the side grooves 142 are connected through the avoidance grooves 143 .

[0052] It should be noted that the two plates 140 in the middle position are used to jointly form a central groove 141, and the central groove 141 needs to be connected to the side grooves 142. At the same time, in order to ensure that the top end of the plate 140 in the middle position can be reliably connected and fixed to the top plate 120, spaced-apart air-avoidance grooves 143 are formed on the top end of the two plates 140 in the middle position. This ensures that the foam can smoothly spread from the central groove 141 through the air-avoidance grooves 143 into the side grooves 142, so that the foam can reliably cover the inner sidewalls of the central groove 141 and the side grooves 142.

[0053] like Figure 2 As shown, in one embodiment, a mounting groove 111 is defined on one side of the bottom plate 110 away from the plate body 140 , and the flame retardant seat 210 is inserted into the mounting groove 111 .

[0054] It should be noted that, in order to facilitate the installation of the flame retardant seat 210 in the base plate 110 , a mounting groove 111 is provided on the bottom side of the base plate 110 so that the flame retardant seat 210 can be plugged into the mounting groove 111 .

[0055] like Figure 2 As shown, in one embodiment, a plurality of slots 112 are further provided on the inner bottom wall of the mounting groove 111 , and a plurality of flame retardant seats 210 are provided, and each flame retardant seat 210 is plugged into each slot 112 in a one-to-one correspondence.

[0056] It should be noted that by providing slots 112 spaced apart in the installation groove 111 , the flame retardant seat 210 can be installed by simply inserting the slots 112 , so that the flame retardant seat 210 can be quickly and conveniently installed in the base plate 110 .

[0057] like Figure 2 As shown, in one embodiment, a first through hole 113 and a second through hole 114 are further provided on the inner bottom wall of the slot 112. The first through hole 113 is connected to the central groove 141, and the second through hole 114 is connected to the side groove 142. When the flame retardant seat 210 is inserted into the slot 112, the spray pipe 260 is inserted into the first through hole 113, and the pressure relief pipe 250 is inserted into the second through hole 114.

[0058] It should be noted that by forming a first through hole 113 and a second through hole 114 on the inner bottom wall of the slot 112, wherein the first through hole 113 is connected to the central groove 141 and the second through hole 114 is connected to the side groove 142, the injection pipe 260 can be adaptively inserted into the first through hole 113, and the pressure relief pipe 250 can be adaptively inserted into the second through hole 114, so that the flame retardant seat 210 can be quickly and conveniently plugged and fixed in the slot 112. In one embodiment, O-rings are provided in both the first through hole 113 and the second through hole 114, and the O-rings are made of silicone. In this way, the O-rings can be used to eliminate the gap between the injection pipe 260 and the first through hole 113, or eliminate the gap between the pressure relief pipe 250 and the second through hole 114.

[0059] like Figure 5 and Figure 6 As shown, in one embodiment, two second through holes 114 are provided, and the two second through holes 114 are respectively connected to the two side grooves 142 . Two pressure relief pipes 250 are provided, and the two pressure relief pipes 250 are used to be respectively inserted into the two second through holes 114 .

[0060] It should be noted that to avoid the installation limitation of the fire-retardant acrylic sheet 10, that is, to enable installation in any orientation, two second through-holes 114 and two pressure relief pipes 250 are provided. This allows the fire-retardant acrylic sheet 100 to have two surfaces facing the fire source. If the sheet body 140 on that side heats up, deforms, or even burns, the hot melt balls 220 in the pressure relief pipes 250 connected to the side grooves 142 of the sheet body 140 on that side will melt immediately, releasing the air pressure in the pressure chamber 211 and allowing the foam to escape. This effectively improves the fire-retardant properties of the fire-retardant acrylic sheet 100.

[0061] like Figures 9 to 12As shown, in one embodiment, the mixed material release member 230 includes a sealing pin 231, a spring 232 and a sealing ring 233. The sealing pin 231 is inserted into the flame retardant seat 210 so that one end of the sealing pin 231 is located in the pressure chamber 211, and the other end of the sealing pin 231 extends between the second material chamber 213 and the first material chamber 212. An air outlet 2311 is provided on the axis of the sealing pin 231, and a conducting groove 2312 is provided on the outer wall of the sealing pin 231. The spring 232 is sleeved on the outer wall of the sealing pin 231, and the spring 232 is respectively connected to the sealing pin 231 and the pressure chamber 211. The inner walls are in contact with each other, and the sealing ring 233 is sleeved on one end of the sealing pin 231 located in the pressure chamber 211. When the air pressure in the pressure chamber 211 increases, the air pressure will push the sealing pin 231, so that the sealing ring 233 closes the air outlet 2311 and the pressure chamber 211, and makes the conducting groove 2312 not connected with the second material chamber 213 and the first material chamber 212. When the air pressure in the pressure chamber 211 drops, the spring 232 pushes the sealing pin 231, so that the air outlet 2311 is connected with the pressure chamber 211, and makes the conducting groove 2312 connected with the second material chamber 213 and the first material chamber 212 respectively.

[0062] It should be noted that a through hole is provided in the flame retardant seat 210, and the through hole extends from the pressure chamber 211 to a position between the second material chamber 213 and the first material chamber 212, and the sealing pin 231 passes through the through hole. The sealing ring 233 is sleeved on the end of the sealing pin 231 located in the pressure chamber 211, and the spring 232 is sleeved on the sealing pin 231, and the spring 232 abuts against the inner side wall of the sealing pin 231 and the pressure chamber 211 respectively. In this way, under the elastic thrust of the spring 232, the sealing pin 231 drives the sealing ring 233 away from the through hole, so that the air outlet 2311 on the sealing pin 231 is connected to the pressure chamber 211, wherein the air outlet 2311 extends to the end of the sealing pin 231 away from the sealing ring 233. Thus, when high-pressure gas is injected into the pressure chamber 211, the thrust of the compression spring 232 is applied to the sealing pin 231, causing the sealing ring 233 to seal the via hole, thereby closing the air outlet 2311 and the pressure chamber 211. This will keep the sealing ring 233 in a state of sealing the pressure chamber 211. In this sealed state, the conducting groove 2312 of the sealing pin 231 is not connected to the second material chamber 213 and the first material chamber 212, thereby preventing the second material chamber 213 from contacting the flame retardant in the first material chamber 212. When the hot melt ball 220 melts, causing the high-pressure gas in the pressure chamber 211 to release pressure, the elastic thrust of the spring 232 can connect the conducting groove 2312 with the second material chamber 213 and the first material chamber 212, thereby allowing the flame retardant to contact and produce a large amount of foam. It should be noted that by opening an air outlet hole 2311 at the axis of the sealing pin 231, the pressure chamber 211 is connected to the outside through the air outlet hole 2311, while the pressure chamber 211 is not connected to the second material chamber 213 and the first material chamber 212. In this way, the impact between the pressure chamber 211 and the second material chamber 213 and the first material chamber 212 can be avoided.

[0063] like Figure 11 As shown, in one embodiment, an annular groove is formed on one end of the sealing pin 231 close to the pressure chamber 211 , and the sealing ring 233 is sleeved in the annular groove. The outer diameter of the sealing ring 233 gradually decreases in the direction away from the pressure chamber 211 .

[0064] In this way, under the pressure of the high-pressure gas in the pressure chamber 211 , the oblique outer edge of the sealing ring 233 can reliably seal the pressure chamber 211 and the gas outlet 2311 , so that the pressure chamber 211 stably and reliably forms a sealed chamber structure.

[0065] like Figure 11 and Figure 12 As shown, in one embodiment, the structure of the spray release member 240 is equivalent to that of the mixing release member 230 , and the sealing pin 231 in the spray release member 240 is used to extend between the spray pipe 260 and the first material chamber 212 .

[0066] It should be noted that the spray release 240 is used to close or connect the spray tube 260 and the first material chamber 212. Its structure, similar to that of the mixing release 230, also consists of a sealing pin 231, a spring 232, and a sealing ring 233. In this way, the high-pressure gas in the pressure chamber 211 can be used to control the operation of the mixing release 230 and the spray release 240. Furthermore, in one embodiment, the spring constant of the spring 232 in the mixing release 230 is greater than the spring constant of the spray release 240. Thus, when the high-pressure gas pressure in the pressure chamber 211 decreases, the spring force of the spring 232 in the mixing release 230 is greater than the spring force of the spray release 240. Therefore, the mixing release 230 actuates before the spray release 240. Specifically, the second chamber 213 communicates with the first chamber 212 before the spray pipe 260. This allows the flame retardant to fully contact the first chamber 212 and generate a large amount of foam before the spray pipe 260 communicates with the central groove 141, allowing the foam to spread to the central groove 141 and the two side grooves 142. This ensures that sufficient air pressure is generated in the first chamber 212, allowing the foam to spread from the bottom of the central groove 141 to the top, and then from the top escape groove 143 to the side grooves 142.

[0067] like Figure 1 As shown, a method for manufacturing a fire-resistant acrylic board includes the following steps:

[0068] Step S10: Obtain a composite acrylic sheet, wherein the composite acrylic sheet has a central groove and two side grooves, the two side grooves are located on either side of the central groove, the tops of the central groove and the two side grooves are connected to each other, and the bottoms of the central groove and the two side grooves are independent of each other;

[0069] Step S20: Obtain a flame retardant assembly, wherein the flame retardant assembly includes a flame retardant seat, a hot melt ball, a mixing release member, and a spray release member. The flame retardant seat is provided with a pressure relief pipe and a spray pipe. The flame retardant seat is provided with a pressure chamber, a first material chamber, and a second material chamber. The pressure chamber is connected to the pressure relief pipe, and the second material chamber and the spray pipe are both connected to the first material chamber. The hot melt ball is disposed in the pressure relief pipe to seal the pressure relief pipe. The mixing release member and the spray release member are both disposed in the pressure chamber. The mixing release member further extends between the second material chamber and the first material chamber, and the spray release member further extends between the spray pipe and the first material chamber.

[0070] Step S30: Filling the pressure chamber with nitrogen at 1.2 MPa to 1.5 MPa to allow the mixing release member to seal the second material chamber and the first material chamber, and the spray release member to seal the spray pipe and the first material chamber;

[0071] Step S40: injecting flame retardant into the first cavity and the second cavity respectively;

[0072] Step S50: insert the flame retardant seat into the bottom end of the composite acrylic board so that the pressure relief pipe is connected to the two side grooves and the spray pipe is connected to the central groove to obtain a fire-resistant acrylic board.

[0073] It should be noted that the hot melt ball is a spherical structure made of paraffin. Nitrogen is filled into the pressure chamber, wherein the pressure of the nitrogen is 1.2MPa~1.5MPa, so as to ensure that the mixing release part reliably closes the second material chamber and the first material chamber, and the spray release part closes the spray pipe and the first material chamber. In this way, when the first material chamber and the second material chamber are independent closed chambers, aluminum sulfate solution is injected into the second material chamber, and sodium bicarbonate solution is injected into the first material chamber. Finally, the flame retardant seat is inserted into the bottom end of the composite acrylic plate to obtain a finished fireproof acrylic plate. In this way, the fireproof acrylic plate obtained by the manufacturing method of the fireproof acrylic plate of the present application can coat the fireproof material on the surface of the composite acrylic plate, effectively achieving the purpose of fire retardancy.

[0074] It should be noted that the flame retardant seat is provided with an injection hole for connecting the pressure chamber, the first material chamber and the second material chamber, so as to inject high-pressure gas into the pressure chamber through the injection hole, or inject flame retardant into the first material chamber and the second material chamber. It should be noted that after the injection is completed, the injection holes can be completely sealed by gluing.

[0075] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A fire-resistant acrylic sheet, characterized in that: include: A composite acrylic plate, wherein the composite acrylic plate has a central groove and two side grooves, the two side grooves are respectively located on either side of the central groove, the top ends of the central groove and the two side grooves are interconnected, and the bottom ends of the central groove and the two side grooves are independent of each other; and a flame retardant assembly comprising a flame retardant seat, a hot melt ball, a mixing release member and a spray release member; the flame retardant seat is provided with a pressure relief pipe and a spray pipe; a pressure chamber, a first material chamber and a second material chamber are provided in the flame retardant seat; the first material chamber and the second material chamber are both used to contain flame retardant; the pressure chamber is connected to the pressure relief pipe, the second material chamber and the spray pipe are both connected to the first material chamber; the flame retardant seat is plugged into the bottom end of the composite acrylic plate so that the pressure relief pipe is connected to the two side grooves and the spray pipe is connected to the central groove; the hot melt ball is arranged in the pressure relief pipe to seal the pressure relief pipe and the side grooves; the mixing release member and the spray release member are both arranged in the pressure chamber; the mixing release member also extends between the second material chamber and the first material chamber to seal the second material chamber and the first material chamber; the spray release member also extends between the spray pipe and the first material chamber to seal the spray pipe and the first material chamber; The mixing release member includes a sealing pin, a spring and a sealing ring, the sealing pin is inserted into the flame retardant seat so that one end of the sealing pin is located in the pressure chamber, and the other end of the sealing pin extends between the second material chamber and the first material chamber. An air outlet is provided on the axis of the sealing pin, and a conducting groove is provided on the outer wall of the sealing pin. The spring is sleeved on the outer wall of the sealing pin, and the spring is respectively in contact with the sealing pin and the inner wall of the pressure chamber. The sealing ring is sleeved on one end of the sealing pin located in the pressure chamber. When the air pressure in the pressure chamber increases, the air pressure will push the sealing pin so that the sealing ring closes the air outlet and the pressure chamber, and the conducting groove is not connected with the second material chamber and the first material chamber. When the air pressure in the pressure chamber decreases, the spring pushes the sealing pin so that the air outlet is connected with the pressure chamber, and the conducting groove is respectively connected with the second material chamber and the first material chamber.

2. The fire-resistant acrylic sheet according to claim 1, characterized in that: The composite acrylic panel includes a bottom panel, a top panel, two side panels, and four panel bodies. The four panel bodies are stacked at intervals, and the bottom ends of the four panel bodies are connected to the bottom panel, the top ends of the four panel bodies are connected to the top panel, and the two sides of the four panel bodies are respectively connected to the two side panels, so that the central groove and the two side grooves are formed between the four panel bodies.

3. The fire-resistant acrylic sheet according to claim 2, characterized in that: The top ends of the two inner plates are each provided with a plurality of spaced-apart air-avoiding grooves, so that the central groove and the side grooves are communicated with each other through the air-avoiding grooves.

4. The fire-resistant acrylic sheet according to claim 2, characterized in that: A mounting groove is provided on one side of the bottom plate away from the plate body, and the flame retardant seat is inserted into the mounting groove.

5. The fire-resistant acrylic sheet according to claim 4, characterized in that: A plurality of slots are further provided on the inner bottom wall of the installation groove, and a plurality of the flame retardant seats are provided, and each of the flame retardant seats is plugged into each of the slots in a one-to-one correspondence.

6. The fire-resistant acrylic sheet according to claim 5, characterized in that: A first through hole and a second through hole are also provided on the inner bottom wall of the slot, the first through hole is connected to the central slot, and the second through hole is connected to the side slot. When the flame retardant seat is inserted into the slot, the spray pipe is inserted into the first through hole, and the pressure relief pipe is inserted into the second through hole.

7. The fire-resistant acrylic sheet according to claim 6, characterized in that: There are two second through holes, which are communicated with the two side grooves respectively. There are two pressure relief pipes, which are used to be inserted into the two second through holes respectively.

8. The fire-resistant acrylic sheet according to claim 1, wherein: The structure of the material spraying release member is equivalent to that of the material mixing release member, and the sealing pin in the material spraying release member is used to extend between the material spraying pipe and the first material cavity.

9. A method for producing a fire-resistant acrylic sheet, for producing the fire-resistant acrylic sheet according to claim 1, characterized in that: The manufacturing method comprises the following steps: Step S10: Obtain a composite acrylic sheet, wherein the composite acrylic sheet has a central groove and two side grooves, the two side grooves are located on either side of the central groove, the tops of the central groove and the two side grooves are connected to each other, and the bottoms of the central groove and the two side grooves are independent of each other; Step S20: Obtain a flame retardant assembly, wherein the flame retardant assembly includes a flame retardant seat, a hot melt ball, a mixing release member, and a spray release member; the flame retardant seat is provided with a pressure relief pipe and a spray pipe; a pressure chamber, a first material chamber, and a second material chamber are defined within the flame retardant seat; the pressure chamber is communicated with the pressure relief pipe; the second material chamber and the spray pipe are both communicated with the first material chamber; the hot melt ball is disposed within the pressure relief pipe to seal the pressure relief pipe; the mixing release member and the spray release member are both disposed within the pressure chamber; the mixing release member further extends between the second material chamber and the first material chamber; and the spray release member further extends between the spray pipe and the first material chamber. Step S30: Filling the pressure chamber with nitrogen at a pressure of 1.2 MPa to 1.5 MPa, so that the mixing release member seals the second material chamber and the first material chamber, and the spray release member seals the spray pipe and the first material chamber; Step S40: injecting flame retardant into the first cavity and the second cavity respectively; Step S50: insert the flame retardant seat into the bottom end of the composite acrylic plate so that the pressure relief pipe is connected to the two side grooves and the spray pipe is connected to the central groove to obtain a fire-resistant acrylic plate.

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