JPS6054250B2 - Method for manufacturing enamel products with irregularly shaped and large-sized states pull pattern - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an enamel product having an irregularly shaped and large staple pattern of a color different from the ground color and used for interior and exterior panels for construction, kitchen equipment, and the like.

Generally, enamel products are manufactured by firing the bottom glaze, then applying the top glaze and firing to produce the final product, and other enamel products have also come to be seen in which designs are printed using transfer paper or the like after the top glaze is fired. On the other hand, in the field of ceramics, enamel products with special surface shapes are obtained by applying a uniquely colored, easy-to-melt glaze to top-firing products and firing them. Furthermore, in the field of interior and exterior panels for construction, etc., enamel products are provided that exhibit a stippled pattern by applying glaze to the base material in a stippled manner. Conventionally, especially in the case of enamel products with the above-mentioned stipple pattern, after the lower glaze is fired, a glaze with a reinforcing substance added to it than the lower glaze is applied in advance in a stippled pattern to create an uneven surface. It is manufactured by forming a staple glaze surface, then applying a colored top glaze and firing the glaze. In this case, in the conventional technology, the size of the staples is often about 1-20cm at most, with a fine pattern, and if you try to make the pattern larger, it becomes a circular staples pull, which has large irregularities and stops (slip indicating plastic flow). This has the disadvantage that the size and shape of the staples are limited because they tend to have a poor stability (ratio of stability and mobility) and tend to be prone to defects such as cracks. This invention is
This technology was developed to overcome the drawbacks of the above-mentioned conventional technology, and even if the method for creating irregularly shaped and large-sized staple patterns is a normal glazing method using spraying, etc. To propose a method for easily glazing large-sized objects, and obtaining enamel products with good glaze retention without making the glaze too thick even when double glazing is applied.

The gist is to apply a top glaze to the enamel product after firing the bottom glaze, which has been treated according to a conventional method, and then immediately after the glaze is applied or after the glaze is applied and fired, 10 pieces of frit are placed on top of the enamel product. In contrast, a viscosity of 11 parts by weight or less, 5.07 parts by weight or less of hydrous amorphous silicon oxide, 5.0 parts by weight or less of bentonite, and 0.05 to 1.1 parts by weight of sodium silicofluoride were added. The structure consists of spraying and firing a finished glaze that can be ground and adjusted. The details of the configuration will be explained below. This invention mainly focuses on the composition of the finishing glaze to be overlaid and its formulation so that a large staple pattern can be achieved by spraying, which is a general-purpose glazing method, without using any special glazing method. It has been improved and completed.

Therefore, in this invention, there is no need to particularly consider the base metal, the underglaze, and the firing method itself. Here, the above-mentioned finishing glaze to be applied will be explained.

This finishing glaze contains 100 parts by weight of frit.
A viscosity of 0 parts by weight or less is added. A small amount of this viscosity is added to the slip (glaze mud) to increase the adhesion strength during glazing, and is important for suspending the slip or preventing settling of the frit. It plays a role. However, when the amount of viscosity in the slip increases, the fluidity deteriorates, the stoppage also worsens, and cracking defects are more likely to occur. That is, if the amount exceeds 1 part by weight, the specific gravity and viscosity of the glaze will increase, creating a drawback that it will be difficult to control the amount and strength of the adhesion. In addition, as a suspending agent for the glaze, 5 J weight part of hydrous amorphous silicon oxide is used in the frit, but if this amount exceeds 1, the dry film will peel off or break-in defects will occur.

In this regard, as a type of suspending agent, the ratio to the frit is 5.
Bentonite below the glaze level is also used, and it plays an important role in adjusting the viscosity of the glaze. However, the amount is 5. If it exceeds the rut area, the specific gravity and viscosity of the glaze! This not only increases the quality of the enamel, but also causes enamel defects such as cracks. On the other hand, in this invention, a small amount of deflocculant (electrolyte substance) is used to control the amount of adhesion and adhesion strength during glazing.

Sodium silifluoride is most suitable for this purpose; other types are not preferred because they require a large amount of addition to glaze a large staple pattern, which may cause discoloration or bubble defects. . The amount of addition is 0.05 to 1 in terms of frit ratio.
．． 0 parts by weight is preferable. This is due to the addition of sodium silicofluoride, as is clear from the drawing showing the relationship between the addition amount and stop time 1 (the time from when a pre-fired enameled product is immersed in a slip and pulled up until the slip stops flowing down). If the amount exceeds 0.05 parts by weight, the retention time will be significantly shortened, while if it exceeds 1.0 parts by weight, foam defects will likely occur. The above-mentioned method for producing an irregularly shaped and large-sized staple pattern by applying the finishing glaze is carried out as follows.

First, it is underglazed using the usual method, and then a top glaze is applied.
Thereafter, the product is either fired once or immediately coated with the above-mentioned finishing glaze over the top glaze and fired again. Possible methods for applying the glaze include dipping and spraying, and other methods such as spraying and painting are also possible. The following is an example of the method of this invention, in which a finishing glaze having the following composition was used.

Top glaze A Finishing glaze B In this example, after the bottom glaze is fired (820-840°C), top glaze A is applied, then finishing glaze B is sprayed and glazed in a stipple pattern, and then 780-800°C is applied. It was baked at ℃ for 4 minutes.

The obtained product was an enameled product having a beautiful appearance and having a light brown irregularly shaped large staple pattern on a dark brown background. As explained above, according to the present invention, it is possible to glaze a large staple pattern with an irregular shape of 3" or more, and it is also possible to obtain an enameled product with good glaze retention.

[Brief explanation of the drawing]

The drawing is a graph showing the relationship between the amount of sodium silifluoride added and the slip stop speed.

Claims (1)

[Claims] 1. A top glaze is applied to the enamel product after firing the bottom glaze treated according to a conventional method, and a hydrated amorphous oxidation product with a viscosity of not more than 10 parts by weight and not more than 5.0 parts by weight per 100 parts by weight of the frit is applied thereon. An irregular large size product characterized by being sprayed with a finishing glaze that can be adjusted by grinding and adding silicon, 5.0 parts by weight or less of bentonite, and 0.05 to 1.0 parts by weight of sodium silifluoride, and then fired. A method for manufacturing an enameled product having a staple pattern.