Metal-faced rigid polyurethane sandwich panel with good sound insulation effect

Abstract

The utility model relates to building material technical field, concretely is a kind of metal face hard polyurethane sandwich panel of good sound insulation effect, main part is by outer layer metal panel, damping buffer layer, modified polyurethane core material layer, perforated sound absorption layer and inner layer metal backplate five layers sequentially bonded composition, modified polyurethane core material layer peripheral side is equipped with first recess, cooperate with the inside positioning convex strip of U-shaped fixing frame, and two U-shaped fixing frames are spliced and fixed on the both sides of core material layer, and the outer wall second recess is fixed with sealing strip, the sandwich panel is through multilayer composite structure and U-shaped fixing frame, sealing strip cooperation, improve sound insulation performance, solve traditional splicing sound leakage problem, stable structure, adapt to industrial plant environment, have weather resistance and installation convenience.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, specifically to a metal-faced rigid polyurethane sandwich panel with good sound insulation. Background Technology

[0002] During industrial plant production, mechanical operation and duct airflow continuously generate mid-to-high frequency and mid-to-low frequency noise. Among these, mid-to-low frequency noise has strong penetrating power and significantly interferes with the workshop working environment. Currently, the commonly used metal-faced rigid polyurethane sandwich panels in factories generally adopt a structure of "metal panel + single polyurethane core material + metal back panel". Their sound insulation effect mainly relies on the blocking ability of the core material itself, and its attenuation effect on mid-to-low frequency noise is significantly insufficient, making it difficult to effectively control the propagation of this type of noise. At the same time, the splicing of the panels often adopts a simple overlapping design, resulting in poor sealing performance and easy formation of sound leakage channels, failing to meet the dual needs of hearing protection for personnel and noise reduction for equipment operation in the factory. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a metal-faced rigid polyurethane sandwich panel with good sound insulation.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a metal-faced rigid polyurethane sandwich panel with good sound insulation effect, comprising a sandwich panel body and two U-shaped fixing frames. The sandwich panel body comprises, from top to bottom, an outer metal panel, a damping buffer layer, a modified polyurethane core material layer, a perforated sound-absorbing layer, and an inner metal back panel.

[0007] The modified polyurethane core material layer has a first groove on its periphery, and the inner side of the U-shaped fixing frame has a positioning protrusion that is inserted into the first groove. The two U-shaped fixing frames are spliced ​​and fixed on both sides of the modified polyurethane core material layer, and the sandwich panel body is located in the inner circle of the two U-shaped fixing frames.

[0008] The outer wall of the U-shaped fixing frame is provided with multiple second grooves, and a sealing strip is fixedly installed in the second groove.

[0009] To facilitate the splicing and fixing of the two U-shaped fixing frames, the improvement of this utility model is that the two ends of the two U-shaped fixing frames are bonded and fixed to the outside of the sandwich panel body.

[0010] To make the U-shaped fixing bracket more securely installed, the improvement of this utility model is that the inner wall of the U-shaped fixing bracket is closely fitted with the outer wall of the sandwich panel body, and the positioning protrusion is closely fitted with the inner wall of the first groove.

[0011] Furthermore, an improvement of this utility model is that the outer metal panel, damping buffer layer, modified polyurethane core material layer, perforated sound-absorbing layer, and inner metal back plate are sequentially bonded and fixed.

[0012] Further improvements to this utility model include: the outer metal panel is made of hot-dip galvanized color steel plate; the damping buffer layer is made of butyl rubber damping material; the modified polyurethane core material layer is made of high-density polyurethane; the perforated sound-absorbing layer is made of galvanized steel plate; the inner metal back plate is made of hot-dip galvanized steel plate; the thickness of the outer metal panel is 0.6 mm; the thickness of the damping buffer layer is 2 mm; the thickness of the modified polyurethane core material layer is 60 mm; the thickness of the perforated sound-absorbing layer is 0.4 mm; and the thickness of the inner metal back plate is 0.5 mm.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a metal-faced rigid polyurethane sandwich panel with good sound insulation, which has the following beneficial effects:

[0015] This application constructs a multi-dimensional sound insulation system through the collaborative design of a five-layer sandwich panel body and a U-shaped fixing frame: the outer metal panel and the inner metal back panel serve as protective layers, which can reduce the damage of external impacts to the internal sound insulation structure and block some sound energy transmission; the damping buffer layer can effectively suppress the structural sound transmission caused by noise vibration of the outer metal panel and cut off the path of sound energy transmission through the panel; the modified polyurethane core material layer blocks airborne sound with its own structure, and in conjunction with the perforated sound-absorbing layer, the sound waves are fully absorbed after entering the core material, especially for the strong penetrating mid-to-low frequency noise in industrial plants, achieving efficient reduction. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 For the present utility model Figure 1 The main view;

[0018] Figure 3 For the present utility model Figure 1 Side view;

[0019] Figure 4 This utility model Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0020] In the diagram: 1. Outer metal panel; 2. Damping buffer layer; 3. Modified polyurethane core material layer; 4. Perforated sound-absorbing layer; 5. Inner metal back panel; 6. First groove; 7. U-shaped fixing bracket; 8. Positioning protrusion; 9. Second groove; 10. Sealing strip. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 The present invention provides a metal-faced rigid polyurethane sandwich panel with good sound insulation effect, comprising a sandwich panel body and two U-shaped fixing frames 7. The sandwich panel body comprises, from top to bottom, an outer metal panel 1, a damping buffer layer 2, a modified polyurethane core material layer 3, a perforated sound-absorbing layer 4, and an inner metal back panel 5.

[0023] The modified polyurethane core material layer 3 has a first groove 6 on its periphery, and the U-shaped fixing frame 7 has a positioning protrusion 8 inserted into the first groove 6 on its inner side. The two U-shaped fixing frames 7 are spliced ​​and fixed on both sides of the modified polyurethane core material layer 3, and the sandwich panel body is located in the inner circle of the two U-shaped fixing frames 7.

[0024] The outer wall of the U-shaped fixing frame 7 is provided with a plurality of second grooves 9, and a sealing strip 10 is fixedly installed in the second grooves 9.

[0025] The outer metal panel 1, damping buffer layer 2, modified polyurethane core material layer 3, perforated sound-absorbing layer 4, and inner metal back plate 5 are sequentially bonded and fixed.

[0026] Sandwich panel body fabrication and interlayer bonding:

[0027] The outer metal panel 1 is made of hot-dip galvanized color steel plate, the damping buffer layer 2 is made of butyl rubber damping material, the modified polyurethane core material layer 3 is made of high-density polyurethane, the perforated sound-absorbing layer 4 is made of galvanized steel plate, and the inner metal back plate 5 is made of hot-dip galvanized steel plate. The thickness of the outer metal panel 1 is 0.6 mm, the thickness of the damping buffer layer 2 is 2 mm, the thickness of the modified polyurethane core material layer 3 is 60 mm, the thickness of the perforated sound-absorbing layer 4 is 0.4 mm, and the thickness of the inner metal back plate 5 is 0.5 mm.

[0028] First, prepare the sandwich panel body, and complete the assembly and connection of each layer in the order from top to bottom: fix the outer metal panel 1 and the damping buffer layer 2 by bonding to ensure that the two layers are tightly attached without gaps; then bond the side of the damping buffer layer 2 away from the outer metal panel 1 to the modified polyurethane core material layer 3 to ensure a strong interface bond.

[0029] Then, the other side of the modified polyurethane core material layer 3 is bonded to the perforated sound-absorbing layer 4, while ensuring that the pore structure of the perforated sound-absorbing layer 4 is not blocked by the adhesive.

[0030] Finally, the perforated sound-absorbing layer 4, located away from the modified polyurethane core material layer 3, is bonded and fixed to the inner metal back plate 5 to form a complete five-layer sandwich panel body consisting of "outer metal panel 1 - damping buffer layer 2 - modified polyurethane core material layer 3 - perforated sound-absorbing layer 4 - inner metal back plate 5". The layers are tightly bonded to prevent sound leakage due to gaps between layers.

[0031] U-shaped fixing bracket 7 is assembled with the sandwich panel body:

[0032] The two ends of the two U-shaped fixing brackets 7 are bonded and fixed to the outside of the sandwich panel body. The inner wall of the U-shaped fixing brackets 7 is tightly fitted to the outer wall of the sandwich panel body, and the positioning protrusion 8 is tightly fitted to the inner wall of the first groove 6.

[0033] First, a first groove 6 is pre-set on the periphery of the modified polyurethane core material layer 3. Then, two U-shaped fixing brackets 7 are taken, and the positioning protrusions 8 on the inner side of each U-shaped fixing bracket 7 are aligned with the first groove 6 of the modified polyurethane core material layer 3. The positioning protrusions 8 are slowly inserted until they are fully embedded in the first groove 6. At the same time, the position of the U-shaped fixing bracket 7 is adjusted so that the inner wall of the U-shaped fixing bracket 7 is tightly fitted with the outer wall of the sandwich panel body, and the positioning protrusions 8 are completely fitted with the inner wall of the first groove 6, ensuring that the two are assembled without looseness.

[0034] (III) Fixing the U-shaped bracket 7 and installing the sealing strip 10:

[0035] After both U-shaped fixing brackets 7 are assembled with the sandwich panel body, the two ends of the two U-shaped fixing brackets 7 are fixed on the outside of the sandwich panel body by adhesive bonding, which further enhances the connection stability between the U-shaped fixing brackets 7 and the sandwich panel body, and at the same time, the U-shaped fixing brackets 7 form protection for the periphery of the sandwich panel body; then take the sealing strip 10 and fix it in the multiple second grooves 9 pre-set on the outer wall of the U-shaped fixing bracket 7 to ensure that the sealing strip 10 fits tightly with the inner wall of the second groove 9 and there is no risk of falling off.

[0036] (iv) On-site splicing of sandwich panel body:

[0037] During on-site installation in an industrial plant, multiple sandwich panel bodies with assembled U-shaped fixing frames 7 and sealing strips 10 are spliced ​​together: the U-shaped fixing frames 7 of adjacent sandwich panel bodies are brought closer to each other. At this time, the sealing strips 10 on the outer walls of adjacent U-shaped fixing frames 7 will squeeze each other. After being squeezed, the sealing strips 10 are compressed into the second groove 9 until the adjacent sandwich panel bodies are spliced ​​in place. The compressed sealing strips 10 fill the splicing gap, thus achieving a seal at the splicing point.

[0038] Each layer is tightly connected by adhesive, with no gaps between layers, preventing sound energy from leaking between layers. Compared with the traditional three-layer structure, the sound insulation effect is greatly improved, meeting the needs of factory personnel for hearing protection and equipment noise reduction.

[0039] The U-shaped fixing bracket 7 is bonded to the outside of the sandwich panel body at both ends, further strengthening the connection strength and providing comprehensive protection for the periphery of the sandwich panel body, preventing the core material layer from being damaged by external force collisions. In addition, the presence of the U-shaped fixing bracket 7 can also enhance the overall rigidity of the sandwich panel body, adapt to the load requirements of industrial plants, and extend the service life of the panels.

[0040] A sealing strip 10 is fixed in the second groove 9 on the outer wall of the U-shaped fixing frame 7. During on-site splicing, the adjacent sandwich panel bodies squeeze the sealing strip 10, compressing the sealing strip 10 into the second groove 9. This not only fills the splicing gap but also achieves a tight seal through the elastic deformation of the sealing strip 10, leaving no obvious splicing gaps. This completely solves the problems of poor sealing and easy sound leakage in traditional simple overlapping designs. At the same time, the mating structure between the sealing strip 10 and the second groove 9 eliminates the need for additional sealing procedures, simplifying the installation process and improving the on-site construction efficiency of industrial plants.

[0041] Both the outer metal panel 1 and the inner metal back plate 5 are made of hot-dip galvanized steel sheet (the outer layer is color steel sheet), which has excellent corrosion resistance and impact resistance, and can withstand the acid and alkali environment and mechanical collision in industrial plants; the damping buffer layer 2 is made of butyl rubber damping material, which has strong stability and is not easy to age.

[0042] The modified polyurethane core layer 3 is made of high-density polyurethane, which combines thermal insulation and structural strength; the perforated sound-absorbing layer 4 is made of galvanized steel plate, which has excellent durability; the synergistic effect of the various materials makes the board not only meet the sound insulation requirements, but also adapt to the complex use environment of industrial plants, making it highly practical.

[0043] U-shaped bracket 7 selection:

[0044] Material selection: hot-dip galvanized cold-rolled steel sheet;

[0045] Sealing strip 10 selection:

[0046] Material selection: Ethylene propylene diene monomer (EPDM) rubber;

[0047] To address the temperature fluctuations (-20℃ to 60℃), long-term compression, and sealing requirements of industrial plants, sealing strip 10 is made of high-elasticity EPDM rubber.

[0048] Weather resistance and aging resistance: EPDM rubber has a propylene content of ≥65%. By adding antioxidants (such as hindered phenols) and ultraviolet absorbers, it can resist temperature changes, light and slight chemical corrosion in the factory. The compression set is ≤20% (70℃×22h test), ensuring that it can still maintain elastic sealing after long-term use.

[0049] Sound insulation and sealing compatibility: The rubber's Shore A hardness is controlled at 50-60, which provides sufficient elasticity (compression capacity up to 30%-40%) to be squeezed and filled into the second groove 9 of the U-shaped fixing frame 7 and the splicing gap, without being too soft and causing "collapse" during long-term use; at the same time, the closed-cell structure of EPDM rubber accounts for ≥90%, which can block airborne sound from propagating through the gap of the sealing strip 10, thus helping to improve the sound insulation effect at the splicing point.

[0050] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A metal-faced rigid polyurethane sandwich panel with good sound insulation, comprising a sandwich panel body and two U-shaped fixing frames (7), characterized in that: The sandwich panel body comprises, from top to bottom, an outer metal panel (1), a damping buffer layer (2), a modified polyurethane core material layer (3), a perforated sound-absorbing layer (4), and an inner metal back panel (5). The modified polyurethane core material layer (3) has a first groove (6) on its periphery, and the U-shaped fixing frame (7) has a positioning protrusion (8) inserted into the first groove (6) on its inner side. The two U-shaped fixing frames (7) are spliced ​​and fixed on both sides of the modified polyurethane core material layer (3), and the sandwich panel body is located in the inner circle of the two U-shaped fixing frames (7). The outer wall of the U-shaped fixing frame (7) is provided with a plurality of second grooves (9), and a sealing strip (10) is fixedly installed in the second groove (9).

2. The metal-faced rigid polyurethane sandwich panel with good sound insulation effect according to claim 1, characterized in that: The two ends of the two U-shaped fixing brackets (7) are bonded and fixed to the outside of the sandwich panel body.

3. The metal-faced rigid polyurethane sandwich panel with good sound insulation effect according to claim 2, characterized in that: The inner wall of the U-shaped fixing frame (7) is closely fitted to the outer wall of the sandwich panel body, and the positioning protrusion (8) is closely fitted to the inner wall of the first groove (6).

4. The metal-faced rigid polyurethane sandwich panel with good sound insulation effect according to claim 3, characterized in that: The outer metal panel (1), damping buffer layer (2), modified polyurethane core material layer (3), perforated sound-absorbing layer (4), and inner metal back plate (5) are bonded and fixed in sequence.

5. A metal-faced rigid polyurethane sandwich panel with good sound insulation as described in claim 4, characterized in that: The outer metal panel (1) is made of hot-dip galvanized color steel plate, the damping buffer layer (2) is made of butyl rubber damping material, the modified polyurethane core material layer (3) is made of high-density polyurethane, the perforated sound-absorbing layer (4) is made of galvanized steel plate, and the inner metal back plate (5) is made of hot-dip galvanized steel plate.

6. The metal-faced rigid polyurethane sandwich panel with good sound insulation effect according to claim 5, characterized in that: The outer metal panel (1) has a thickness of 0.6 mm, the damping buffer layer (2) has a thickness of 2 mm, the modified polyurethane core material layer (3) has a thickness of 60 mm, the perforated sound-absorbing layer (4) has a thickness of 0.4 mm, and the inner metal back plate (5) has a thickness of 0.5 mm.

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