Waterproof sound absorption type polycarbonate plate and preparation method thereof

Abstract

The invention discloses a waterproof sound absorption type polycarbonate plate and a preparation method, and relates to the related field of polycarbonate plates, and the waterproof sound absorption type polycarbonate plate comprises a TPO coiled material, a PC composite plate, sound insulation cotton, an adhesive layer, a hollow layer, honeycomb convex pieces and honeycomb lines. Honeycomb lines of the top-layer TPO waterproof coiled material and the middle-layer PC board are meshed with each other, so that the bonding stability is enhanced, and slippage and stripping are prevented; a honeycomb hollow cavity is formed in the middle layer and is combined with a bottom continuous PC plate support, so that the weight is reduced, and the sound absorption performance is improved; the bottom layer of independent sound-absorbing cotton is provided with an adhesive layer, overall rapid installation is facilitated, the overall structure is light and high in strength, the waterproof and noise reduction effects are excellent, and the structure is suitable for various architectural acoustics and protection scenes.

Description

Technical Field

[0001] The present invention relates to the field of polycarbonate plates, and particularly to a waterproof and sound-absorbing polycarbonate plate and a preparation method thereof. Background Art

[0002] A polycarbonate plate is a high-performance engineering plastic plate made of polycarbonate (PC) resin through processes such as extrusion or injection molding. It has excellent transparency, impact resistance, high-temperature resistance, weather resistance, and flame retardancy. Its light transmittance is close to that of glass, but its weight is only half of that of glass. At the same time, its impact strength is 250 times that of ordinary glass. Therefore, it is often used to replace glass in applications such as building lighting, curtain walls, skylights, canopies, greenhouses, advertising light boxes, bulletproof glass, etc. In addition, the polycarbonate plate also has good processability, is easy to cut, drill, and thermally bend, and is suitable for multiple fields such as industrial manufacturing, electronic and electrical, mechanical protection, and safety protection. It is a multi-purpose material with both safety and functionality. Adding a thermoplastic polyolefin waterproof coil to the polycarbonate plate can achieve stable waterproofing.

[0003] A sound-insulating polycarbonate plate with Chinese Patent Application No.: CN201721163603.9 includes a sound-insulating layer, an upper polycarbonate plate disposed on the upper side of the sound-insulating layer, and a lower polycarbonate plate disposed on the lower side of the sound-insulating layer. Protrusions are provided on the side surfaces of the upper polycarbonate plate and the lower polycarbonate plate that cooperate with the sound-insulating layer. Corresponding grooves that cooperate with the protrusions are provided on the upper and lower side surfaces of the sound-insulating layer. A structure with a sound-insulating layer sandwiched between two layers of polycarbonate plates forms contact surfaces of two different substances, causing the noise to gradually attenuate step by step. The cooperation of the protrusions and the grooves is a snap-fastener type design. After being processed by dry heating and pressurization, the connection between the three layers of plates can be made firm and close. The structure of the present utility model is simple, novel in design, uses polycarbonate material to solve the problem of the fragility of glass materials, and can effectively shield most of the noise, improving the living environment of people.

[0004] In the actual use process of the above patent and the prior art, the following problems exist. The overall composite plate structure is relatively single, resulting in weak sound insulation and waterproof effects, and weak fitting stability. Moreover, during the production process, the glue application component needs to be manually disassembled and cleaned, which is labor-consuming and reduces work efficiency. Summary of the Invention

[0005] Therefore, in order to solve the above deficiencies, the present invention provides a waterproof and sound-absorbing polycarbonate plate and a preparation method thereof.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A waterproof and sound-absorbing polycarbonate board and a preparation method thereof, including a TPO coil, a PC composite board is arranged at the bottom of the TPO coil, a sound insulation cotton is arranged at the bottom of the PC composite board, and an adhesive layer is arranged at the bottom of the sound insulation cotton; A hollow layer is opened at the lower end inside the PC composite board, honeycomb convex pieces are arranged at the top of the PC composite board, and honeycomb patterns matching the honeycomb convex pieces are arranged on the bottom joint surface of the TPO coil.

[0007] Preferably, the specific steps are as follows: S1: Preparation of the PC composite board. Select high-transparency and high-impact polycarbonate material particles, pre-dry them at 110°C for 4 - 6 hours, control the moisture content < 0.02%, and use a double-sided mold for injection molding to form honeycomb convex pieces on the top of the PC board; Hollow layer engraving, use precision CNC engraving inside the PC board to open a hollow cavity, and keep the bottom PC board continuous and complete; S2: Preparation of the TPO coil. Select thermoplastic polyolefin waterproof coil raw materials with excellent aging resistance, ultraviolet resistance, and flexibility, press honeycomb patterns on the bottom surface of the TPO coil through a calender, require the honeycomb size to be accurately corresponding to the honeycomb convex piece pattern, and perform surface corona treatment after pressing; S3: Intermediate gluing treatment. Use an auxiliary gluing device to apply glue to the top joint surface of the PC composite board, select a thermoplastic composite adhesive, control the thickness between 50 - 100μm, and do not apply glue separately to the bottom of the TPO coil; S4: Hot press lamination. Align the honeycomb convex pieces of the PC composite board with the honeycomb patterns of the TPO coil to ensure accurate fitting of the honeycomb textures, pre-press and exhaust to avoid air bubble residues, temperature: 120 - 140°C, pressure: 0.2 - 0.5MPa, holding pressure time 30 - 60s, and then perform shaping by cooling roll pressing at room temperature; S5: Addition of the sound insulation cotton c layer. Select sound insulation cotton made of PET fiber by hot pressing, apply glue and stick it to the bottom of the PC composite board, then coat a layer of pressure-sensitive adhesive on the bottom of the sound insulation cotton through a spraying machine, and finally cover it with a PE release film.

[0008] Preferably, the auxiliary gluing device includes a fixed seat with a notch opened at the right inner end, a cleaning component arranged at the left front end of the fixed seat, a pushing mechanism arranged at the bottom of the fixed seat, a contact plate installed on the left side of the notch inside the fixed seat, a blocking plate arranged at the right inner end of the fixed seat, and a gluing component installed on the top of the pushing mechanism.

[0009] Preferably, a driving motor is arranged at the left end of the back of the fixed seat, and a set of rotating rollers are respectively arranged at the left and right positions at the lower end inside the fixed seat. The left rotating roller is connected to the output shaft of the driving motor, and the outer sides of the two groups of rotating rollers are connected by a scraping belt.

[0010] Preferably, an opening is formed at the right end of the inner bottom of the fixed seat, the opening corresponds to the glue application assembly, and magnets are arranged at both ends of the inner side of the opening.

[0011] Preferably, the cleaning assembly includes a box body arranged at the left front end of the fixed seat and communicated with the fixed seat, a water injection pipe arranged on the left side of the box body, a water spraying pipe arranged at the upper end of the box body and connected to the water injection pipe, and a scraping block arranged at the upper end of the box body close to the box body.

[0012] Preferably, inclined convex blocks are arranged at the left and right positions at the upper end of the inner side of the box body.

[0013] Preferably, the pushing mechanism includes a fixed guiding frame arranged at the lower end of the fixed seat, a first cylinder connected to the left front end of the fixed guiding frame, a connecting plate connected to the pushing rod of the first cylinder, a connecting rod connected to the back surface of the connecting plate, a supporting rod hinged to both the left and right ends of the connecting rod, guide wheels arranged at both ends of the back surface of the connecting rod, and a supporting column fixed at the right front end of the connecting rod. The glue application assembly is located above the connecting plate.

[0014] Preferably, the rear end of the fixed guiding frame is in the shape of a guide rail, and the guide wheels are movably embedded in the rear end of the fixed guiding frame.

[0015] Preferably, the glue application assembly includes a fixed shell with the top corresponding to the opening of the fixed seat, glue injection pipes arranged at both ends of the front end face of the fixed shell, a glue application mesh arranged at the upper end of the fixed shell, a connecting ear arranged at the bottom of the fixed shell and connected to the other end of the supporting rod, second cylinders arranged at both ends of the bottom of the fixed shell, the pushing rods at the tops of the second cylinders contacting the glue application mesh, a partition arranged in the middle of the fixed shell, and electromagnets embedded at the left and right positions inside the fixed shell.

[0016] The beneficial effects of the present invention: The present invention adopts the top - layer TPO waterproof coiled material to interlock with the honeycomb pattern of the middle - layer PC board, enhancing the bonding stability and preventing slipping and peeling; a honeycomb - shaped hollow cavity is arranged inside the middle layer, combined with the continuous PC board support at the bottom, which not only reduces the weight but also improves the sound absorption performance; the bottom - layer independent sound - absorbing cotton is provided with an adhesive layer, facilitating the overall quick installation. The overall structure is light - weight, high - strength, and has excellent waterproof and noise - reduction effects, and is applicable to various building acoustics and protection scenarios.

[0017] The present invention is completed by using an auxiliary glue - applying device in the glue - applying process. The auxiliary glue - applying device is internally provided with a pushing mechanism, the top of the pushing mechanism is connected to the glue - applying assembly. The glue - applying assembly can contact the passing wood along with the pushing mechanism to realize automatic glue application, and the glue - applying area inside the glue - applying assembly can be replaced. Moreover, the glue - applying mesh 63 inside it can be automatically removed and cooperate with the cleaning assembly and the scraping belt for efficient cleaning, with good automation effect, reducing manual operation and effectively improving work efficiency. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the bonding surface between the TPO coil material and the PC composite board of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the auxiliary glue coating device of the present invention.

[0021] Figure 4 It is a schematic internal structural diagram of the main view of the auxiliary glue coating device of the present invention.

[0022] Figure 5 It is a schematic structural diagram of the pushing mechanism of the present invention.

[0023] Figure 6 It is a schematic partial structural diagram of the pushing mechanism of the present invention.

[0024] Figure 7 It is a schematic structural diagram of the glue coating assembly of the present invention.

[0025] Wherein: TPO coil material - a, PC composite board - b, sound insulation cotton - c, adhesive layer - d, hollow layer - b1, honeycomb convex piece - b2, honeycomb pattern - a1, auxiliary glue coating device, fixed seat - 1, cleaning assembly - 2, pushing mechanism - 3, contact plate - 4, blocking plate - 5, glue coating assembly - 6, driving motor - 11, rotating roller - 12, scraping belt - 13, box body - 21, water injection pipe - 22, water spraying pipe - 23, scraping block - 24, fixed guiding frame - 31, first air cylinder - 32, connecting plate - 33, connecting rod - 34, support rod - 35, guide wheel - 36, support column - 37, fixed shell - 61, glue injection pipe - 62, glue coating net - 63, connecting ear - 64, second air cylinder - 65, partition plate - 66, electromagnet - 67. Specific embodiments

[0026] In order to further explain the technical solution of the present invention, the following is elaborated in detail through specific embodiments.

[0027] Please refer to Figure 1 and Figure 2 , the present invention provides a waterproof and sound - absorbing polycarbonate board and a preparation method, including a TPO coil material a, the bottom of the TPO coil material a is bonded to the top of a PC composite board b, a sound insulation cotton c is provided at the bottom of the PC composite board b, an adhesive layer d is bonded to the bottom of the sound insulation cotton c, a hollow layer b1 is opened at the lower end inside the PC composite board b, honeycomb convex pieces b2 are provided on the bonding surface at the top of the PC composite board b, and honeycomb patterns a1 matching the honeycomb convex pieces b2 are provided on the bonding surface at the bottom of the TPO coil material a.

[0028] The present invention provides a preparation method of a waterproof and sound-absorbing polycarbonate board. S1: Preparation of the PC composite board b. Select high-transparency and high-impact polycarbonate material particles, pre-dry them at 110°C for 5 hours, control the moisture content <0.02%, and use a double-sided mold for injection molding to form honeycomb convex tabs b2 on the top of the PC board. Engrave the hollow layer b1. Use precision CNC engraving inside the PC board to open a hollow cavity, and keep the bottom layer of the PC board continuous and intact. S2: Preparation of the TPO coil a. Select a thermoplastic polyolefin waterproof coil raw material with excellent aging resistance, ultraviolet resistance, and flexibility. Press honeycomb patterns on the bottom surface of the TPO coil a through a calender, and require the honeycomb size to be accurately corresponding to the pattern of the honeycomb convex tabs b2. After pressing, perform surface corona treatment. S3: Intermediate gluing treatment. Use an auxiliary gluing device to apply glue to the top bonding surface of the PC composite board b. Select a thermoplastic composite adhesive, and control the thickness between 75μm. Do not apply glue separately to the bottom of the TPO coil a. S4: Hot pressing and compounding. Align the honeycomb convex tabs b2 of the PC composite board b with the honeycomb patterns a1 of the TPO coil a to ensure accurate fitting of the honeycomb textures. Pre-press and exhaust to avoid air bubble residues. The temperature is: 130°C, the pressure is: 0.35 MPa, and the pressure holding time is 30 - 60 s. Then, perform shaping by cooling and rolling at room temperature. S5: Adding the sound-absorbing cotton c layer. Select a sound-absorbing cotton c made of PET fiber by hot pressing and adhesively bond it to the bottom of the PC composite board b. Then, coat a layer of pressure-sensitive adhesive on the bottom of the sound-absorbing cotton c through a spraying machine, and finally cover it with a PE release film.

[0029] Please refer to Figure 3 and Figure 4 , the auxiliary gluing device includes a fixed seat 1 for support. A cleaning component 2 is installed at the left front end of the bottom of the fixed seat 1. A pushing mechanism 3 is installed at the lower end inside the fixed seat 1. A notch is opened at the right rear end inside the fixed seat 1, and a contact plate 4 is welded on the left side inside the notch. A blocking plate 5 is installed at the right end inside the fixed seat 1. A gluing component 6 is installed at the right end of the top of the pushing mechanism 3. An opening is opened at the right end of the bottom inside the fixed seat 1, and the opening corresponds to the gluing component 6. Magnets are arranged at both ends of the inner side of the opening. A driving motor 11 is arranged at the left end of the back of the fixed seat 1, and a set of rotating rollers 12 are arranged at the left and right positions at the lower end inside the fixed seat 1 respectively. The left rotating roller 12 is connected to the output shaft of the driving motor 11, and the outer sides of the two sets of rotating rollers 12 are connected by a scraping belt 13. The cleaning component 2 includes a box body 21, and the box body 21 is communicated with the inside of the fixed seat 1. A water injection pipe 22 is arranged on the left side of the box body 21. A water spraying pipe 23 communicating with the water injection pipe 22 is installed at the upper end inside the box body 21. A water outlet hole is opened at the upper end inside the water spraying pipe 23. A scraping block 24 is locked at the upper end inside the box body 21. Inclined protruding blocks are arranged at the left and right positions at the upper end inside the box body 21 to facilitate blocking the water column and making it more concentrated on the scraping block 24. A sealing cover is arranged at the bottom of the box body 21 to facilitate drainage.

[0030] Please refer to Figure 5 and Figure 6 Figure 6 A connecting rod 34 is fixed to the back surface of the connecting plate 33. Grooves are formed at both ends of the back surface of the connecting rod 34. A set of support rods 35 are respectively hinged to both ends of the front surface of the connecting rod. The other ends of the support rods 35 are connected to the glue application assembly 6. Guide wheels 36 are installed inside the grooves. The guide wheels 36 are movably embedded in the guide rail position at the rear end of the fixed guide frame 31. A support column 37 is fixed to the lower right end of the front surface of the connecting rod 34 for supporting the connecting rod 34.

[0031] Please refer to Figure 7 Figure 7

[0032] The specific implementation process is as follows: When glue application is required, the auxiliary glue application device needs to be used. First, both ends of the device are connected to the sheet conveying equipment. When the sheet enters the device, the pushing mechanism 3 is first started to work. The first cylinder 32 pushes the connecting plate 33. During the movement of the connecting plate 33, the rear end is guided by the guide wheels 36 on the back surface of the connecting rod 34. Under continuous movement, the support rods 35 at the right end are blocked by the blocking plate 5 and can swing. The two groups of support rods 35 can lift the glue application assembly 6 connected to the other end and place it at the notch position at the right end of the fixed seat 1 to contact the passing sheet. After contacting the sheet, glue is supplied by an external glue supply device, enters the inside of the fixed shell 61 through the glue injection pipe 62, and then is discharged from the glue application mesh 63 to start glue application. When it is necessary to clean the glue - applying mesh 63 or apply glue over a large area, the glue - applying assembly 6 is reset by starting the first cylinder 32, so that the glue - applying mesh 62 is placed at the opening position at the bottom of the fixed seat 1. Then, the second cylinder 65 is started to work, and the second cylinder 65 can lift the glue - applying mesh 62. At the same time, the adsorption of the electromagnet 67 on the glue - applying mesh 62 needs to be released. When it is placed at the opening, it is adsorbed by the magnets at both ends, completing the removal of the glue - applying mesh 62. Then, the first cylinder 32 is started again to apply glue over a large area to the corresponding wood through the partition plate 66; Since the top of the glue - applying mesh 62 contacts the scraping belt 13, the driving motor 11 is started to work. The driving motor 11 drives the rotating roller 12 to rotate. When the rotating roller 12 rotates, the scraping belt 13 can move accordingly, and at the same time, the residual glue on the glue - applying mesh 62 is scraped off. It is cleaned in cooperation with the passing scraping block 24. At the same time, external water is injected through the water injection pipe 22 into the spray pipe 23 and sprayed out to achieve efficient cleaning of the scraping belt 13.

[0033] The above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A waterproof and sound-absorbing polycarbonate board, characterized in that: It comprises a TPO coil, a PC composite board is arranged at the bottom of the TPO coil, a sound insulation cotton is arranged at the bottom of the PC composite board, and an adhesive layer is arranged at the bottom of the sound insulation cotton; A hollow layer is provided at the lower end of the PC composite board, a honeycomb convex piece is provided on the top of the PC composite board, and a honeycomb pattern matching the honeycomb convex piece is provided on the bottom bonding surface of the TPO coil.

2. The method for preparing a waterproof and sound-absorbing polycarbonate sheet according to claim 1, characterized in that: The specific steps are as follows: S1: Preparation of PC composite board, select high-transparency, high-impact polycarbonate material particles, pre-dry at 110°C for 4-6 hours, control the moisture content to less than 0.02%, use double-sided mold injection molding to form honeycomb convex pieces on the top of the PC board; hollow layer carving, use precision CNC carving inside the PC board to open a hollow cavity to keep the bottom PC board continuous and complete; S2: Preparation of TPO membranes. Select thermoplastic polyolefin waterproof membrane materials with excellent aging resistance, UV resistance and flexibility. Use a calender to press honeycomb patterns on the bottom of the TPO membrane. The size of the honeycomb must accurately correspond to the honeycomb convex pattern. After pressing, perform surface corona treatment. S3: Middle glue coating treatment, use auxiliary glue coating device to coat the top bonding surface of PC composite board, select thermoplastic composite adhesive, the thickness is controlled between 50~100μm, and the bottom of TPO coil is not coated separately; S4: Hot pressing and laminating, aligning the honeycomb convex pieces of the PC composite board with the honeycomb patterns of the TPO coil to ensure accurate fitting of the honeycomb patterns, pre-pressing and exhausting to avoid residual bubbles, temperature: 120-140℃, pressure: 0.2-0.5MPa, holding time 30-60s, followed by cooling and roller pressing at room temperature for shaping; S5: Add a layer of sound insulation cotton c, then use PET fiber hot-pressed sound insulation cotton to glue it to the bottom of the PC composite board, then use a sprayer to apply a layer of pressure-sensitive adhesive on the bottom of the sound insulation cotton, and finally cover it with PE release film.

3. The method for preparing a waterproof and sound-absorbing polycarbonate board according to claim 2, characterized in that: The auxiliary gluing device includes a fixing seat with a notch at the inner right end, a cleaning assembly arranged at the left front end of the fixing seat, a pushing mechanism arranged at the bottom of the fixing seat, a contact plate installed on the left side of the notch in the fixing seat, a blocking plate arranged at the inner right end of the fixing seat, and a gluing assembly installed on the top of the pushing mechanism.

4. The method for preparing a waterproof and sound-absorbing polycarbonate sheet according to claim 3, characterized in that: A driving motor is arranged at the left end of the back side of the fixing seat, and a group of rotating rollers are arranged at the left and right positions of the lower end inside the fixing seat, the rotating roller at the left end is connected to the output shaft of the driving motor, and the outer sides of the two groups of rotating rollers are connected by a scraping belt.

5. The method for preparing a waterproof and sound-absorbing polycarbonate board according to claim 4, characterized in that: An opening is provided at the right end of the bottom inner portion of the fixing seat, the opening is arranged corresponding to the glue coating component, and magnets are arranged at both ends of the inner side of the opening.

6. The method for preparing a waterproof and sound-absorbing polycarbonate board according to claim 4, characterized in that: The cleaning assembly includes a box body arranged at the left front end of the fixing seat and the two are connected, a water injection pipe arranged at the left side of the box body, a water spray pipe arranged at the upper end of the box body and connected to the water injection pipe, and a scraping block arranged at the upper end of the box body close to the box body.

7. The method for preparing a waterproof and sound-absorbing polycarbonate board according to claim 6, characterized in that: The left and right positions of the upper inner side of the box body are provided with inclined protruding blocks.

8. The method for preparing a waterproof and sound-absorbing polycarbonate board according to claim 5, characterized in that: The pushing mechanism includes a fixed guide frame arranged at the lower end of the fixed seat, a first cylinder connected to the left front end of the fixed guide frame, a connecting plate connected to the pushing rod of the first cylinder, a connecting rod connected to the back of the connecting plate, a support rod hinged to the left and right ends of the connecting rod, guide wheels arranged at both ends of the back of the connecting rod and a support column fixed to the right front end of the connecting rod, and a glue coating component is located above the connecting plate.

9. The method for preparing a waterproof and sound-absorbing polycarbonate board according to claim 8, characterized in that: The rear end of the fixed guide frame is in the shape of a guide rail, and the guide wheel is movably embedded in the rear end of the fixed guide frame.

10. The method for preparing a waterproof and sound-absorbing polycarbonate board according to claim 9, characterized in that: The glue coating assembly includes a fixed shell with an opening at the top corresponding to the fixed seat, glue injection tubes arranged at both ends of the front end surface of the fixed shell, a glue coating net arranged at the upper end of the fixed shell, a connecting ear installed at the bottom of the fixed shell and connected to the other end of the support rod, a second cylinder arranged at both ends of the bottom of the fixed shell, a push rod at the top of the second cylinder contacts the glue coating net, a partition arranged in the middle of the fixed shell, and an electromagnet embedded in the left and right positions on the inner side of the fixed shell.

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