JPH0689071A - Molding material for art and its production - Google Patents

Abstract

PURPOSE:To stably supply a molding material for art (for educational purpose) by using diatomaceous earth or the like as the raw material, to make recycling of this material possible by heat treatment, to avoid pollution of nature, and to stabilize this material. CONSTITUTION:The molding material for art (for educational purpose) is obtd. by mixing a vinyl acetate resin (e.g. CF 630 by KONISI CASTING Co.), a powdery inorg. filler (diatomaceous earth, volcano sand, sand, etc.) and water, for example in 1:2:3 mixing ratio. The obtd. liquid mixture is poured in a die and dried (may be dried naturally or forcedly) to solidify.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for modeling art (educational material).

2. Description of the Related Art In the conventional art education for art and design, natural materials such as wood and stone, and chemical compounds such as gypsum and paraffin are used as modeling materials (educational materials). In order to provide a large amount of uniform processed products to children and students, it is necessary to cut or mine a large amount of uniform and homogeneous wood and stone. Although chemical compounds such as gypsum and paraffin are also provided, the workability is inferior to that of wood, and the modeling state of the finished product can only be expressed in blocks. Moreover, shavings of gypsum come out in the form of powder, so that children and students suck the shavings at the time of work and at the time of cleaning up, which is a health problem. Next, a paraffin-shaped molding material is left on the desk or floor for a long time because shavings tend to adhere and are difficult to remove. Since the adhered matter is soft and water repellent, sand particles and the like adhere to the upper side and cannot be removed. Also, when performing work involving water,
It has been pointed out that cleansing and safety problems cause the fall of children and students due to the water repellent effect.

In recent years, as environmental problems have been addressed, wood used as a material for modeling arts and crafts is a factor that promotes environmental destruction and is difficult to obtain. New modeling materials are required. For this reason, foamed cement and gypsum materials are provided,
In some cases, it cannot be replaced because the workability is different from wood and the modeling state at the time of completion is different. Therefore, it is necessary to provide a drawing and art modeling material (educational material) whose workability and the modeling state of the finished product are similar to those of wood. In the present invention, since diatomaceous earth or something similar is used as the raw material, a stable supply can be achieved. In addition, it can be recycled by performing heat treatment. Therefore, it is an object to avoid the destruction of nature and to stably supply the modeling material (educational material) for art and craft.

[Means for Solving the Problems] A vinyl acetate resin (for example, CF630 manufactured by Konishi Co., Ltd.), an inorganic filler in powder form (diatomaceous earth, shirasu, sand grains, etc.), and water, for example, 1: It is a modeling material (educational material) that is made by pouring a liquid mixture obtained by mixing it in a ratio of 2: 3 into a mold, drying it (either natural drying or forced drying) and solidifying it. Vinyl compounds include chloride type and acetic acid type, but vinyl chloride type has a rubber-like solid substance and emits a toluene type solvent when dried, which may cause a safety problem in the manufacturing process. Therefore, vinyl acetate was used. Above all, we used the one that met the standards based on the Food Sanitation Law in consideration of the case where children and students should put it in their mouth.
Next, an inorganic filler was selected as a filler because it does not deteriorate in a steady state and can be recycled by heat treatment. Regarding the mixing ratio of the resin and the filler, if the ratio of resin: filler = 3: 8 is exceeded, a solid material will not be formed after drying. On the contrary, if the ratio of resin: filler = 1: 1 is exceeded, the resin component will be deposited on the surface. In addition, the solid material becomes rubber-like and is not suitable as a molding material. The amount of water is added so that the resin and the filler can be easily stirred and poured into the mold easily, but if added in a large amount, the mixture of the resin and the filler is separated. In addition, the shrinkage rate when dried is significantly increased, and the accuracy of the product is significantly reduced. According to the experimental result, the filler: water content = 2: 3 can perform stable stirring, the shrinkage rate is small, and the precision is small.

In the present invention, since the powdery filler is used as the raw material, the shavings generated during processing can be easily treated. For example, if it is incinerated, it is reduced to the original filler. Further, by controlling the particle size of the filler, it is possible to obtain an appropriate cutting feeling. By changing the particle size distribution and the filler, it is possible to obtain a feel similar to stone as well as wood. In addition, it is possible to express a three-dimensional composition like wood that was not possible with stone materials. For example, a box-shaped molded article or the like can be manufactured by using a technique such as cutting or bonding.
Also, because it is much lighter than natural stone, it can be displayed on the wall. And it becomes easy for children and students to carry. Children and students use blades (saws, chisels, chisels, etc.) to make works, but due to differences in their individual production abilities, processing may fail during the process. that time,
In the case of wood and stone, repair is difficult and most of them often lead to irreparable damage. However, the modeling material provided by the present invention can be easily restored with a vinyl acetate adhesive or the like in a short time. Next, regarding dust, since the filler is solidified through the resin, it does not easily become a fine powder, and the fine powder does not easily scatter in the air.
Therefore, the possibility of inhalation by children / students is low, and the safety is higher than that of stone or plaster. Moreover, since it does not adhere to the classroom, it is easy to clean and clean up.

Example: 1 kg of water was added to 10 kg of powdered diatomaceous earth.
Mix 3.5 Kg for about 5 minutes. To this, 4 kg of vinyl acetate resin, such as CF630, is added and mixed for another 5 minutes until it becomes familiar. Form this mixed liquid with a mold such as 5
It is poured into 50 × 270 × 30 mm within about 10 minutes and naturally dried for about 1 week. During this time, it is reversed once or twice to prevent warpage. Although diatomaceous earth was used in the above-mentioned examples, shirasu or volcanic ash, sand grains, etc. may be used.
CH18 (bond for woodworking) for vinyl acetate resin
And so on. In addition, when sand particles having a relatively large granularity are used as the filler, a fiber material such as virgin pulp may be mixed as a reinforcing material. Further, by adding a water-soluble pigment to water and kneading, a colored present modeling material can be prepared.

Industrial Applicability As described above, according to the present invention, the effects of preventing environmental destruction due to felling of wood, enabling the recycling of materials, and being reproducible are described. Can be easily lead to completion,
It greatly contributes to the improvement of artistic education for the purpose of giving joy of completion and improving the expression of three-dimensional modeling education of art education and art education.

Claims (2)

[Claims] 1. A molding material characterized by being formed by drying and solidifying a liquid mixture obtained by mixing a vinyl acetate resin, an inorganic filler (diatomaceous earth, shirasu, sand grains, etc.) and water. Educational material). 2. A molding material characterized by being formed by drying and solidifying a liquid mixture obtained by mixing a vinyl acetate resin, an inorganic filler (diatomaceous earth, shirasu, sand grains, etc.) and water. Educational material) manufacturing method.