JPS5843358B2 - Manufacturing method of inorganic substrate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an inorganic substrate, which is characterized in that a wet mat 1 made of an inorganic material is coated with a paint 2 containing a release agent and then subjected to a molding process. An object of the present invention is to provide a method for manufacturing an inorganic substrate that can efficiently produce molded products of good quality.

In conventional processing methods, inorganic materials are generally formed using a wet mat roll or press, and then painted after curing and drying steps.

However, wet mats using rolls or presses (
Molding in wet mats (in a hydrated state) has poor mold releasability due to the strong adhesion of wet mats to rolls or presses, which requires a release agent application step before molding, which increases the number of processes and makes it difficult to mold. It has the disadvantage that it requires a long time, and since it is painted after drying, the water absorption effect of the board increases and the amount of paint applied increases.

Taking the case of a press as an example, the above conventional method is
Finishing treatment is performed through the mold release agent application process in Figure a, the press molding process in b, the curing process in C, the drying process in d, and the painting process in e. In the figure, 1 is a wet mat and 3 is a press. , 4 is a mold release agent, 5 is a lower mold, 6 is a curing oven, 7 is a drying oven, 8
9 is a conveyor, and 10 is an applicator.

The present invention aims to eliminate such conventional drawbacks, and will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an example using a press 3, in which finishing treatment is performed through a painting process shown in a, a pressing process shown in b, a curing process shown in C, and a drying process shown in d.

First, a release agent, such as a liquid release agent such as silicone, vegetable oil, or mineral oil, is added to the paint and stirred with a mixer or the like to disperse it well to prepare the release agent-containing paint 2, which is placed in the applicator 10. Before the press molding process shown in FIG. 1, the release agent-containing paint 2 is applied to the wet mat 1 using an applicator 10, as shown in FIG.

Here, the materials for the wet mat 1 include cement, slate, gypsum, calcium silicate, magnesium carbonate, rock wool, calcium aluminate monosulfate hydrate (MSH), calcium aluminate trisulfate hydrate (TSH), etc. alone or in combination. It is used as

Further, any paint can be used, but generally water-soluble emulsion type vinyl acetate, ethylene-vinyl acetate, acrylic resin, etc. are suitable.

The amount of release agent used is, for example, 0.1 to 1.0% based on the paint.
Although the degree is preferable, it may be in a range other than this, and the type may also be solid or paste-like other than those exemplified above.

Immediately after coating the mold release agent-containing paint 2, pressure molding is performed using a press 3 and a lower mold 5 as shown in FIG.

In this case, if the press 3 is provided with a pressure forming section, an end surface finishing section, and a cutting section, finishing processing can be performed at the same time as the forming process.

After releasing the mold from the press 3, as shown in FIG. The treated inorganic substrate is obtained as a product.

In the present invention, as described above, the molding process is performed after applying a paint containing a mold release agent to the wet mat made of inorganic material, so the conventional mold release agent application process is the same as the paint application process. This method has the advantage of reducing the number of steps and processing time.

In addition, since the coating is applied to a wet mat that contains water, it does not absorb water like it does after drying, so the amount of paint applied is reduced to about 1/2, which has the advantage of improving efficiency. Since a mold release agent is blended with the mold release agent, the mold release property after molding is also good, and the surface condition of the obtained inorganic substrate is also advantageous.

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

〔Example〕

2% coconut oil was added to an aqueous emulsion type vinyl acetate resin paint and stirred to obtain a paint emulsion containing a release agent.

When this was applied to a calcium silicate wet mat in the step shown in FIG. 1a, a uniform coating film was obtained with a coating amount of 10 to 15 g/square.

In addition, when this was molded, cured, dried and finished according to Figures 1 to d, it did not adhere to the mold (press) during molding and had good moldability, and the surface of the obtained calcium silicate plate It was in good condition.

[Comparative example]

Following Figure 2 a to e, healing oil was applied as a mold release agent to the molding surface of the press, then a calcium silicate wet mat was pressure molded, and after curing and drying, a water-based emulsion type vinyl acetate resin paint was applied. However, 20-35g/
Good results could not be obtained without angular application.

[Brief explanation of drawings]

Figures 1 a to d are schematic process explanatory diagrams of an embodiment of the present invention;
FIGS. 2a to 2e are schematic process explanatory diagrams of a conventional example, 1
2 indicates a wet matte, and 2 indicates a release agent-containing paint.

Claims (1)

[Claims] 1. A method for manufacturing an inorganic substrate, which comprises applying a paint containing a mold release agent to a wet mat of an inorganic material, and then subjecting it to molding.