JPS6059148B2 - Manufacturing method of lightweight ceramic panels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing specialized lightweight ceramic panels.

The present inventor has developed a core board body made of a sound insulating material such as a flexible board, slate, iron plate, aluminum plate, gypsum board, paper sheet, aluminum foil, etc. This is a sound-absorbing panel sandwiched between porous sound-absorbing materials such as foam boards, and the planar area of the core board is smaller than the planar area of the entire sound-absorbing panel. We have devised a sound-absorbing panel that has a resonance chamber inside and has improved sound-absorbing performance since the energy inside the room is absorbed by the porous sound-absorbing material that fills the room.

That is, in FIG. 1, 1 indicates a core board body made of a sound insulating material such as a flexible board, slate, iron plate, aluminum plate, gypsum board, paper sheet, aluminum foil, etc., and 2 indicates the core board body 1. The planar shapes of the porous sound-absorbing material sandwiched between both sides of the sandwich structure and the core board 1 are various, and each figure a to e shows this. However, this plane area is smaller than the plane area of the entire sound absorbing panel 3, and due to this difference, the slits or holes 4,...
... is formed, and the sound that enters from here is confined in the resonance chamber formed between the core port body 1 and the mounting surface of the sound absorption panel 6, and the porous sound absorption filling the room. Since the sound is absorbed by the material 2, there is no unabsorbed sound, and the sound absorption performance is improved.

Here, in the case of a combination in which a lightweight ceramic is adopted as the porous sound absorbing material 2 and an inorganic port such as flexibor board or slate is adopted as the core board 1, this sandwich structure To make it the
As in the case of other types of combinations, the process of preparing the corresponding lightweight ceramic panels separately for the upper and lower layers of the inorganic board, pasting the inorganic board on one layer, and then overlapping the other layer. It will take a while.

Therefore, separate firing processes are required for the lightweight ceramic panels above and below the inorganic board.
In this respect, the same applies to inorganic boards, and the above-mentioned bonding process is further added to this. Incidentally, the firing of the above-mentioned lightweight ceramic panel will be detailed as follows.

In other words, the raw material for lightweight ceramic is porous spherical foamed stone (spherical foamed obsidian), and its diameter is 0.5 Tfr! ! &
Each grain in the order of ~5 has a glassy thin porous structure with a composition as shown in Table 1. Conventional lightweight ceramic panels are made by mixing this with an inorganic binder, filling it in a mold, forming it, and then putting it in a furnace at 200-300℃ for about 2 hours.
It is baked for a long time and has a snow-like appearance.

The present invention has been made in view of the above-mentioned points, and provides a method for manufacturing the above-mentioned sandwich structure sound absorbing panel with only one firing step.

This will be explained in detail below.

First, as in the conventional method, a mixture of porous spherical foam stone and an inorganic binder is packed in a mold to the thickness shown in Figure 1 and formed flat, and then a flexible board or slate is used as a core material. Place an inorganic bonding agent on both sides of an inorganic board such as
Stone powder, foamed stone powder (foamed obsidian powder), etc., which will be used to make the board during firing, are kneaded with an inorganic binder and poured thinly and flatly onto a predetermined planar shape to a predetermined thickness.
On top of that, a mixture of porous spherical foam stone and an inorganic binder, similar to conventional ones, is filled and formed, then placed in a furnace and fired, including the core material, resulting in an integrated panel. Completed all at once.

As described above, the method of the present invention is extremely suitable because it is possible to complete a sound absorbing panel in which the core board is embedded in the sandwich structure in a single firing step.

[Brief explanation of the drawing]

FIGS. 1A and 1B are cross-sectional and plan views of the sound absorbing panel according to the present invention. 1... Core material board body, 2... Porous sound absorbing material, 3... Sound absorbing panel.

Claims (1)

[Claims] 1. An inorganic sound-insulating core board is sandwiched between lightweight ceramic boards on both sides to create a sandwich structure, and the planar area of the core board is smaller than the planar area of the entire panel. This is a method of manufacturing a sound absorbing panel that improves sound absorption performance by configuring a resonance chamber.First, a mixture of porous spherical foam stone and an inorganic binder is mixed in a mold to the position of the core board body. Fill it and form it into a flat shape, and then place a ready-made inorganic board as a core material on top of this, or pour a mixture of stone powder, foamed stone powder, etc. and an inorganic binder into a flat shape to form the board by firing. A method for producing a special lightweight ceramic panel, which is characterized in that a mixture of porous spherical foam stone and an inorganic binder is further filled on top, molded and then fired.