JPS5834422B2 - Pottery base molding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves a first step of manufacturing a rubber female mold from a prototype having deep unevenness with hooks where the ground and the uneven patterned wall surface intersect at right angles or acute angles; a second step of applying a mold release agent to the inner surface of the female mold and manufacturing a rubber prototype from the female mold;
Furthermore, a third step of manufacturing a water-absorbing female mold made of flammable or thin plaster from this rubber master mold, and a fourth step of molding a base material using the water-absorbing female mold manufactured in the third step,
The present invention relates to a method for forming a ceramic base comprising a fifth step of firing the base without separating the base from the female mold.

Conventionally, when manufacturing pottery, slurry was poured into a female plaster mold, water was absorbed from the surface of the female plaster mold, the slurry was hardened along the female mold, and after the unhardened slurry was discharged, the mold was removed and the ceramic base was made. It was intended to be molded and processed.

However, the moisture-absorbing hardening material described above shrinks slightly when it hardens, so when removing a female mold that has deep unevenness where the surface of the material and the uneven pattern wall intersect at right or acute angles, the catching is a dog. It is difficult.

Furthermore, when producing the female mold, it is difficult to separate the female mold from the master mold if there is a deep catch as described above.

The present invention has been made in view of the above-mentioned drawbacks, and a sculpture pattern made by a sculptor or a pattern made by a potter is placed in a mold.

This prototype has deep unevenness where the ground and the uneven pattern wall intersect at right angles or acute angles, and liquid silicone rubber mixed with a hardening agent is poured into the formwork to create a flexible and elastic structure. The first step is completed by hardening the rubber female mold and separating the mold 3 and the master mold from the rubber female mold (this first step is not shown).

The separation is facilitated by the flexibility or elasticity of the rubber female die.

A mold release agent such as potash soap was applied to the inner surface of the female mold, liquid silicone rubber mixed with a hardening agent was poured into the female mold, and a male mold 1 (hereinafter referred to as After the rubber mold (referred to as the rubber mold) is cured, the female mold is separated to complete the second process.

When the liquid silicone rubber is cured, it does not shrink and expands due to heat for a long time.

Next, this rubber mold 1 is placed inside a mold 3 on a stand 2 as shown in FIG. After forming, the mold 3 is demolded, and the rubber prototype 1 is separated from the female mold 4 to complete the third step.

In this third step, when the mold is introduced, the surface of the rubber master mold 1 is sufficiently moistened so that the mold is placed in a deep trap where the ground of the rubber master mold 1 and the uneven patterned wall surface intersect at right or acute angles. It is possible to form a flammable button and a water-absorbing female mold 4 by sufficiently penetrating into the mold (deep groove type) or vertical type (reverse tapered type) unevenness 5 and in close contact with the same unevenness 5, and from the same female mold 4. By pulling the rubber mold 1, the mold 1 is deformed due to its elasticity and flexibility, and is separated from the female mold 4 by being pulled completely through.

A slurry is injected into the female mold 4, absorbing moisture from the surface of the female mold 4, and the base material 6 is hardened and molded.

Then, the uncured slurry is discharged and the same substrate 6 is dried.
Finish the process.

When the thus-formed base 6''J? and female mold 4 are placed in a ceramic furnace and fired in the usual manner, the female mold 4 burns and disappears, and the base 6 is exposed in the furnace, and the firing process (fifth step) is completed. ) can be terminated.

Furthermore, if the female mold 4 is made of thin gypsum, the female mold 4 will crack or deliquesce in the furnace.

Since the present invention is based on the method described above, it is possible not only to easily reproduce a large amount of water-absorbing female mold 4 from one master mold having deep unevenness as described above, but also to reproduce from the same female mold 4 as described above. There is an effect that it is possible to mass-produce pottery having unevenness 5 with deep catching without having to separate the base 6 having unevenness 5 with deep catching.

[Brief explanation of drawings]

Fig. 1 is a plan view of the rubber mold, Fig. 2 is a longitudinal sectional view taken along line A-A in Fig. 1, showing the rubber mold housed in the mold, and Fig. 3 is a plan view of the female mold. FIG. 4 is a longitudinal sectional view taken along the line B--B in FIG. 3, FIG. 5 is a longitudinal sectional view of the female mold end and the base material, and FIG. 6 is a partially cutaway side view of the female mold end and the base material. 1... Rubber prototype, 4... Female mold, 6... Base material.

Claims (1)

[Claims] 1 The first step is to manufacture a rubber female mold from a prototype having deep unevenness where the ground and the uneven pattern wall intersect at right or acute angles, and then apply a mold release agent to the inner surface of this rubber female mold. a second step of coating and manufacturing a rubber master mold 1 from the same female mold; a third step of manufacturing a water-absorbing female mold 4 made of flammable or thin plaster from the rubber master mold 1; A method for forming a ceramic base, which comprises a fourth step of molding the base 6 using the water-absorbing female mold 4 produced in the step, and a fifth step of firing the base 6 without separating it from the female mold 4.