JPS5850849B2 - Manufacturing method of inorganic substrate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that an endless strip of felt 5 is placed on the upper surface of a suction section 4 that is sucked by a vacuum pump, and the felt 5 is
is freely driven by a roller 9, a wet cloak 1 made of an inorganic material is placed on the top surface of the felt 5, and pressure molded from the top surface of the wet mat 1 with a mold 2. At the same time, the moisture of the wet mat 1 is passed through the felt 5 to the suction section. 4, the suction section 4 suctions the mold 2 from the wet mat 1, and then the felt 5 is driven to transport the molded wet mat 1. The purpose of the manufacturing method is to provide a method for manufacturing an inorganic substrate that has good mold releasability and can be molded while reducing moisture content.

The only molding method for inorganic substrates is to adjust the thickness of wet mats using rolls;
Processing such as edge processing and cutting is generally performed in a dry cloak state as a post-process after drying.

In addition, edge forming or patterning using a wet mantle is not used for rock wool or other mineral fiberboards due to the material's characteristic of remarkable elastic recovery.

On the other hand, in the production of calcium silicate plates and other similar inorganic substrates, filtration is sometimes performed using a Nanche pump or other vacuum pump, but even in this case, edge forming, patterning, cutting, etc. are performed after filtration. It's just that.

The present invention was completed as a result of research in view of this situation, and will be described in detail below based on the attached drawings.

In Figure 1, 1 is a wet cloak made of inorganic material, 2 is a mold set in a hydraulic press or other pressurizing machine, 3 is a perforated board such as a punching board or wire mesh, and 4 is this perforated board. 3 is a box-shaped suction section provided on the lower surface side and is connected to a vacuum pump (not shown) with a pipe; 5 is a felt placed on the perforated plate 3 and moved by rollers 9; It is possible.

Although rock wool can be used as the above inorganic material, cement, slate, gypsum, magnesium carbonate, etc.
Calcium silicate, calcium aluminate monosulfate hydrate (MSH), calcium aluminate trisulfate hydrate (TSH), etc. alone or in combination are preferably used.

For example, a TSH-calcium silicate wet cloak 1 after papermaking is introduced into the apparatus shown in FIG. Pressure mold.

On the other hand, at the same time as the above-mentioned setting, the suction section 4 is operated by a vacuum pump to suction and remove moisture generated during the above-mentioned pressure molding process from the lower surface of the wet cloak 1 through the felt 5.

After a certain period of time has elapsed, pressure is removed while maintaining the suction by the suction section 3, and the mold 2 and wet mat 1 are released, and the molding is completed.

Thereafter, the felt 5 is moved to send the formed wet mat 1 to the next process.

Similarly, the mold structure can be designed so that end finishing, patterning, and cutting can be performed at the same time in mold 2.
In FIG. 1, 6 is a molding surface, T is an end finishing portion, and 8 is a cutting blade.

In the case of a TSH-calcium silicate wet cloak, suitable molding conditions are a pressure of 1 to 100 @/cra and a suction pressure of 1 to 600 Hg, but these may be set as appropriate depending on the material.

Instead of direct pressure molding using the residual mold 2, a roll or other suitable pressure means may be used.

In the present invention, as described above, the wet mat made of inorganic material is pressurized from one side by the mold and the other side is sucked by the suction part, so that the squeezed surplus water generated by the pressurization is transferred to the wet mat. It is possible to prevent a polyhydric layer from forming and adhering to the molding surface of the mold, which would occur if the wet mat is simply pressurized. If the mold is used as the upper mold, the upper mold will be released with the wet cloak being sucked into the lower mold, so that the above-mentioned moisture layer will not be formed. This also has the advantage of improving mold releasability and improving the condition of the molding surface of the press-molded product.

In addition, as mentioned above, a considerable amount of excess moisture is simultaneously removed during pressure molding due to the suction action, and for example, if the moisture content is around 70%, it will drop to around 55%, and in the subsequent process. It is possible to reduce costs by reducing the amount of heat and time required for drying.

In addition, an endless strip of felt is placed on the top of the suction part that is sucked by the vacuum pump, and the felt can be freely driven by a roller, so that the wet cloak after being formed is transported by driving the felt. A pressure-molded wet cloak placed on felt! It can be removed from the mold, and the productivity of inorganic substrates can be improved by continuously performing molding with the mold and conveying with felt. The work can be carried out safely without the need to take out the wet mat.

The present invention will be specifically described below based on embodiments.

〔Example〕

A wet mat (moisture content: 70) of TSH-calcium silicate (1:1 by weight) was obtained by paper making.

This was prepared to a size of 150 mm x 150 m x 12 tran.

This wet mat is brought to a pressure of 50 t using the apparatus shown in FIG.
/era and pressure molding at a suction pressure of 100 rranHg, the mold could be released smoothly.

For comparison, when pressure molding was carried out in the same manner except that suction was not performed, the mold adhered to the upper surface of the wet mat and could not be released from the mold.

In the above case, when suction was applied, the moisture content after pressure molding was reduced to 60 to 65 ratios, but when suction was not performed, it remained at 65 ratios.

Furthermore, when the relationship between water content and mold release resistance was investigated, it was found that the lower the water content was, the smaller the mold release resistance was, as shown in Figure 2.

Similarly, the mold release resistance was measured by tensile strength (ky/cr?r).

[Brief explanation of drawings]

FIG. 1 is a schematic front view of an embodiment of the device used in the present invention;
FIG. 2 is a graph showing -f1 of the relationship between the moisture content of the wet cloak and the mold release resistance, where 1 is the wet mat, 2
4 represents a mold, 4 represents a suction portion, 5 represents felt, and 9 represents a roller.

Claims (1)

[Claims] 1. An endless strip of felt is placed on the upper surface of the suction part that is sucked by a vacuum pump, and the felt is freely driven by rollers. A wet mat material is set and pressure molded using a mold from the top of the wet mat.At the same time, the moisture in the wet mat is sucked through the felt at the suction section, then sucked at the suction section, and the mold is released from the wet cloak. let me,
A method for producing an inorganic substrate, characterized in that the formed wet mat is then conveyed by driving felt.