CN103742048A - Door board with foamed aluminum core - Google Patents

Abstract

The invention discloses a foamed aluminum sandwich door panel, comprising: an upper panel, a lower panel, and a core layer arranged between the upper panel and the lower panel, wherein the core layer includes a frame, and a foamed aluminum core, and the foamed aluminum core is inlaid In the frame, and the thickness of the aluminum foam core is smaller than the thickness of the frame. Since the foamed aluminum core is embedded in the frame, and the thickness of the foamed aluminum core is smaller than the thickness of the frame, two air cavities are formed between the upper and lower panels and the foamed aluminum core, so the multiple reflections of sound waves in the air cavity can be used , and the sound-absorbing characteristics of aluminum foam itself work together to form a sound-insulation mechanism to achieve the purpose of sound insulation.

Description

Aluminum foam sandwich door panel

technical field

The invention belongs to the field of door panel manufacturing, and relates to a door panel used in a large conference room and a family bedroom, in particular to a foam aluminum sandwich door panel.

Background technique

Aluminum foam is an aluminum-based metal material containing a large number of disordered and uniformly distributed pores. It has the mechanical properties of high specific strength and high specific stiffness, as well as sound insulation, heat insulation, flame retardant, electromagnetic shielding and impact energy absorption properties. Good and many other functions, so it has a wide range of application prospects. At present, it is widely used in the floors of high-speed trains and cars, as well as the guardrails on both sides of railways and highways.

With the development of society, the sources of external noise are diversified, and the noise presents the characteristics of high intensity and time uncertainty. At the same time, people's requirements for working, living and resting environments are getting higher and higher, so the requirements for sound insulation and shock insulation performance of interior doors are increasing day by day. Although the current office and family bedroom door panels on the market use sandwich structures filled with organic fibers, foam plastics, wood debris and coated with organic damping materials, the shock absorption and sound insulation performance has been improved, but the sound insulation effect of these materials is not very ideal. At the same time, it has problems such as low strength and poor fire resistance. Once a fire breaks out, it may release toxic gases, and the consequences will be more serious.

Contents of the invention

In view of the above defects or deficiencies, the object of the present invention is to provide a foamed aluminum sandwich door panel with good sound insulation performance and safety performance.

For achieving above object, technical scheme of the present invention is:

It includes: an upper panel, a lower panel, and a core layer arranged between the upper panel and the lower panel, wherein the core layer includes a frame and a foamed aluminum core, and the foamed aluminum core is embedded in the frame, and the thickness of the foamed aluminum core is smaller than that of the frame thickness of.

The frame includes an upper frame and a lower frame matched with the upper frame. The upper frame and the lower frame have the same structure, and the upper frame and the lower frame are respectively provided with grooves, and the foamed aluminum core is engaged in the groove of the upper frame and the lower frame. in the slot.

The four corners of the upper frame and the lower frame are connected by pins.

The depth of the groove is 0.5cm, and the thickness of the aluminum foam core is 1cm.

The length and width of the foamed aluminum core are the same as the length and width of the groove on the lower frame.

Glue is applied around the rectangular frame of the core layer and bonded with the upper panel and the lower panel.

The foamed aluminum core is made of closed-cell foamed aluminum.

The pore diameter of closed-cell aluminum foam is 2-5mm, and the relative density is 0.2-0.4.

Compared with prior art, the beneficial effects of the present invention are:

The invention provides a foamed aluminum sandwich door panel. Since the foamed aluminum core is embedded in the frame, and the thickness of the foamed aluminum core is smaller than the thickness of the frame, two air cavities are formed between the upper and lower panels and the foamed aluminum core. , can use the multiple reflections of sound waves in the air cavity and the sound-absorbing characteristics of foamed aluminum to form a sound insulation mechanism; secondly, the closed-cell foamed aluminum used in the sandwich structure door panel of the present invention has high The mechanical properties of specific strength and high specific stiffness, sound insulation, flame retardancy, heat insulation, electromagnetic shielding performance, and the characteristics of non-volatile toxic or harmful gases in case of fire; in addition, the aluminum foam sandwich door panel of the present invention also has structural quality Lightweight, simple and compact structure, easy to install advantages.

Description of drawings

Fig. 1 is the structure schematic diagram of aluminum foam sandwich door panel of the present invention;

Fig. 2 is an exploded view of the aluminum foam sandwich door panel of the present invention.

In the figure, 1 is a frame, 1-1 is an upper frame, 1-2 is a lower frame, 2 is a core layer, 3-1 is an upper panel, 3-2 is a lower panel, and 4 is an aluminum foam core.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the present invention provides a foamed aluminum sandwich door panel, comprising: an upper panel 3-1, a lower panel 3-2, and an upper panel 3-1 and a lower panel 3-2 The core layer 2, wherein the core layer 2 includes a frame 1 and an aluminum foam core 4, the aluminum foam core 4 is embedded in the frame 1, and the thickness of the aluminum foam core 4 is smaller than the thickness of the frame 1, wherein the frame 1 includes an upper frame 1-1 and the lower frame 1-2 matched with the upper frame 1-1, the upper frame 1-1 and the lower frame 1-2 have the same structure, and the upper frame 1-1 and the lower frame 1-2 are respectively provided with grooves The aluminum foam core 4 is engaged in the grooves of the upper frame 1-1 and the lower frame 1-2, and the length and width of the aluminum foam core 4 are the same as the length and width of the grooves on the upper frame 1-1 and the lower frame 1-2. same width. In this way, two air cavities are formed in the middle of the sandwich structure door panel, and the sound waves enter the air layer through the panel. Due to the special structure of the closed-cell foam aluminum and the random and non-directional characteristics of the cells, it forms different surface holes after cutting. form. On the one hand, due to the closed-cell foam aluminum, the sound wave produces diffuse reflection, and the sound wave is reflected multiple times in the air layer to interfere with the noise reduction; on the other hand, the sound wave enters the gap of the foam aluminum, causing the skeleton to vibrate to release heat and consume sound energy. At the same time, the upper and lower panels also have a certain sound insulation effect. The four corners of the upper frame 1-1 and the lower frame 1-2 are connected by pins.

In the present invention, the aluminum foam is a closed-cell aluminum foam, using industrially produced standard aluminum foam plates with a length of 240 cm and a width of 90 cm, with a thickness between 1-15 cm, a pore diameter of 2-5 mm, and a relative density of 0.2-0.4, which can be Cut into desired size slabs as needed.

The manufacture method of aluminum foam sandwich door panel of the present invention is:

1. Process the wooden rectangular frame into a groove splint of the required shape and size; process a wooden rectangular frame with a length of 200cm, a width of 90cm, and a thickness of 1cm, and carve a width of 2cm on the rectangular frame with a width of 5cm. A groove with a thickness of 0.5 cm;

2. Cut the closed-cell aluminum foam into a flat plate of the required size; cut the selected closed-cell aluminum foam into a plate with a width of 194cm, a width of 84cm, and a thickness of 1cm;

3. Process the wooden board into a panel of the required shape and size; process the selected wooden board into a panel with a length of 200cm, a width of 90cm, and a thickness of 1cm;

4. Place the cut closed-cell foam aluminum between the upper frame 1-1 and the lower frame 1-2, and connect the four corners with pins to form the middle core layer 2;

5. Glue the upper panel 3-1 and the lower panel 3-2 to the surrounding rectangular frame of the core layer 2 in the middle, wherein the closed-cell foam aluminum core layer 4 and the upper panel 3-1 and the lower panel 3-2 respectively contain Air layer with a thickness of 0.5cm.

Finally, edge milling, veneering and surface painting are carried out to the upper panel 3-1 and the lower panel 3-2.

The characteristics of the present invention are: firstly, the multiple reflections of sound waves in the two air cavities and the sound-absorbing characteristics of the closed-cell foamed aluminum work together to insulate the sound; secondly, the sandwich structure door panel has a high ratio Mechanical properties of strength and high specific stiffness, good sound insulation, flame retardant, heat insulation, electromagnetic shielding performance, and non-volatile toxic or harmful gases in case of fire; in addition, the structure is light in weight, simple and compact in structure, and easy to install .

Claims (8)

1. A foam aluminum sandwich door panel, characterized in that it includes: an upper panel (3-1), a lower panel (3-2), and an upper panel (3-1) and a lower panel (3-2) The core layer (2) between them, wherein the core layer (2) includes the frame (1) and the foamed aluminum core (4), the foamed aluminum core (4) is embedded in the frame (1), and the foamed aluminum core (4 ) is less than the thickness of the frame (1). 2. The aluminum foam sandwich door panel according to claim 1, characterized in that, the frame (1) includes an upper frame (1-1) and a lower frame (1-1) matched with the upper frame (1-1). 2), the structure of the upper frame (1-1) and the lower frame (1-2) is the same, and the upper frame (1-1) and the lower frame (1-2) are respectively provided with grooves, and the foamed aluminum core layer (4 ) snap into the grooves of the upper frame (1-1) and the lower frame (1-2). 3. The aluminum foam sandwich door panel according to claim 2, characterized in that, the four corners of the upper frame (1-1) and the lower frame (1-2) are connected by pins. 4. The foamed aluminum sandwich door panel according to claim 2, characterized in that, the depth of the groove is 0.5 cm, and the thickness of the foamed aluminum core (4) is 1 cm. 5. The aluminum foam sandwich door panel according to claim 2 or 4, characterized in that the length and width of the aluminum foam core (4) are the same as the length and width of the groove on the lower frame (1-2). 6. The foamed aluminum sandwich door panel according to claim 1, the rectangular frame of the core layer (2) is coated with glue around it and bonded to the upper panel (3-1) and the lower panel (3-2). 7. The aluminum foam sandwich door panel according to claim 1 or 2, characterized in that the aluminum foam core (4) is made of closed-cell aluminum foam. 8. The aluminum foam sandwich door panel according to claim 7, characterized in that the closed-cell aluminum foam has a pore diameter of 2-5mm and a relative density of 0.2-0.4.

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