JPS6351842B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clay molding method for molding clay into containers such as teacups and jars in the process of making ceramics.

In this type of molding method, as shown in Fig. 2, clay 4 as a raw material is put into a female mold A made of plaster, and then a male mold B, which has a smaller diameter than the female mold A, is inserted into the female mold A. These molds A and B are press-fitted into mold A.
When the clay 4 is rotated, the clay 4 is expanded in the gap formed between the molds A and B, thereby forming the container 4'.

However, in this type of molding method, when trying to mold a container with an embossed peripheral surface, the concave part of the female mold A engages with the convex part of the molded clay 4, as shown in FIG. There was a drawback that when the clay 4 was removed from the female mold A, the relief would fall off or be deformed.

Furthermore, this type of molding method has the disadvantage that since the female mold A is made of gypsum, its strength is low and its life is therefore short.

The present invention aims to provide a viscosity molding method that can eliminate these drawbacks.

The method of the present invention will be explained below with reference to the accompanying drawings.

As shown in FIG. 1, the method of the present invention involves charging a molten low-melting metal 2 into a first female mold 1 that can rotate along a horizontal plane, and then placing the metal 2 into the first female mold 1. A first male mold 3 made of an elastic material having a higher melting point than the first male mold 3 is press-fitted, and these two molds 1 and 3 are simultaneously rotated, so that the metal 2 is
The mold is extended between the female mold 1 and the first female mold 3 to form a second female mold 2', and then the first male mold 3 is removed from the second female mold 2'. A predetermined amount of clay 4 is put into the second female mold 2', and then a second male mold 5 made for molding the clay is press-fitted into the second female mold 2'. These two molds 2' and 5 are rotated simultaneously, thereby causing the clay 4 to be stretched between the second female mold 2' and the second male mold 5 to form a container 4', for example, a teacup. After molding, the second female mold 2' is removed from the first female mold 1, the clay 4 is dried, and then the second female mold 2' is heated and melted and then removed from the container 4'. At the same time, the second male mold 5 is pulled out from the container 4', thereby completing the clay molding process.

The above-mentioned low melting point metal 2 is, for example, a product name Zero Bend (alloy with a melting point of 71°C) manufactured by Toyo Rust Industry Co., Ltd.
However, lead, solder, etc. may also be used without being limited to this.

In the method of the present invention, when molding the metal 2 into the second female mold 2', the metal 2 heated and melted in advance is
The metal 2 may be put into the female mold 1, or the metal 2 may be heated and melted in the first female mold 1, but the metal 2 separated from the container 4' in the final step
If it is charged into the first female mold 1 in a liquid state without being cooled, there are advantages in that it saves materials and also simplifies the work process.

The first female mold 3 may be made of an elastic resin material such as silicone rubber, and in this embodiment, an embossed part is formed on the side circumferential surface, but the invention is not limited to this; for example, In order to form the clay 4 into a pot or the like, the side surface may be swollen.

The first male mold 3 is made smaller in diameter than the first female mold 1, and the first male mold 3 is made smaller in diameter than the first female mold 1.
While pressing the metal 2 in the female mold 1, the metal 2 is lowered to a position slightly above the bottom surface of the first female mold 1, thereby transferring the metal 2 to the outer peripheral surface and bottom surface of the first male mold 3. and the inner peripheral surface and bottom surface of the first female mold 1.

The step of molding the liquid metal 2 into the second female mold 2' includes the first female mold 1 and the first male mold 3.
These molds 1 and 3 are held stationary without rotating.
Liquid metal 2 may be introduced into the space 6 between them.

Furthermore, in the method of the present invention, the second male mold 5 is also made so that its diameter is smaller than the diameter of the second female mold 2', and the second male mold 5 is connected to the second female mold 5. When pressed into the mold 2', the clay expands into the space 7 formed between the molds 2', 5.
In this case, without rotating the two molds 2' and 5 together, the second female mold 2' or the second male mold 5
It is sufficient to rotate either one of them, but if both molds 2' and 5 are rotated in the same direction at the same time,
For example, if the rotation speed of the second male mold 5 is made slightly lower than the rotation speed of the second female mold 2', there is an advantage that the friction between the clay 4 and these molds 2' and 5 is reduced. There is.

Here, the method of the present invention is a method for removing the second female mold 2' made of metal 2 from the first female mold 1, for example, in advance so that metal does not adhere to the inner surface of the first female mold 1. Coating treatment may be performed with Teflon resin, silicone resin, etc., or a hole may be provided in the bottom surface of the first female mold 1 (which is closed during molding of the metal 2), and a high pressure may be applied from this hole. A method of releasing the mold by blowing air may also be used.

In the method of the present invention described above, when removing the second female mold 2' attached to the container 4' molded with clay 4, the second female mold 2' is replaced with the second female mold 2'. 1
The second female mold 2' may be removed from the female mold 1 and heated and melted by applying hot air or the like, but the present invention is not limited thereto. After heating and melting, the container 4' may be pulled out from the molten metal 2.

In the method of the present invention, the step of pulling out the second male mold 5 from the container 4' is performed while the second female mold 2' and the container 4' are located inside the first female mold 1. You can go while you still have time.

The container 4' molded from the clay 4 according to the method of the present invention is then fired into earthenware or porcelain.

Since the method of the present invention is as described above, its use has the following effects.

Since the second female mold 2' attached to the container 4' formed of clay 4 is to be removed by heating and melting, protrusions and recesses are provided on the circumferential surface of the container 4'. However, these uneven portions do not deform or fall off.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the method of the present invention, and FIGS. 2 and 3 are schematic diagrams explaining the conventional method. In the figure, 1 is a first female mold, 2 is a low melting point metal, 2' is a second female mold, 3 is a first male mold, 4 is clay, 4' is a container, 5 is a second male mold, 6 and 7 each indicate a space.

Claims (1)

[Claims] 1. By interposing a molten low melting point metal between a first female mold made for molding the metal and a first male mold made of an elastic body with a higher melting point than the metal, molding into a second female mold, then removing the first male mold from the second female mold, and then removing the first male mold from the second female mold.
Clay is put into the female mold, and then a second male mold made for molding the clay is press-fitted into the second female mold, and the second female mold or the second male mold is pressed into the second female mold. At least one of them is rotated, whereby the clay is stretched between the second female mold and the second male mold to form a container, and then the second female mold is heated and melted. A method for molding clay, characterized in that the clay is removed from the container.