JPH0324284A - Glaze for forming dotty pattern like stone grain on surface of enamel product - Google Patents

Abstract

PURPOSE:To easily form the dotty patterns like the high-grade stone grains of granite, marble, etc., by mixing glaze for forming a body and glaze for forming stone grains having high refractoriness and viscosity to prepare the glaze for patterning the surface of cast enamel products, then glazing the products and firing the products. CONSTITUTION:After ground coat slip 2 is glazed on a casting body 1 of a bath tub, etc., the glaze is dried and fired. Underlying layers of stone grains consisting of upper one layer 3 and upper two layers 4 are formed thereon; thereafter, the glaze mixture composed of the glaze 5 for forming the body consisting of 100 parts transparent glaze essentially consisting of 45% SiO2, 10% B2O3, 10% Na2O, and 10% Li2O and 3 parts black coloring pigment and having 15mum average grain size and 2 to 149mum grain size constitution and the glaze 6 for forming the stone grain like dots having the compsn. consisting of 50% SiO2, 8% B2O3, 15% Na2O, 5% Li2O, and 7% b2O5, and having 500mum average grain size and 300 to 840mum grain size constitution is applied on the above-mentioned layers and is fired at 950 to 1050 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a glaze for patterning the surface of cast enamel products such as bathtubs.

[Conventional technology]

Conventional cast enamel products have a basic pattern of a single color, and even when a pattern is applied to the surface, the pattern is simple and monotonous at best.

In recent years, as household kitchen and sanitary appliances have become more sophisticated, there has been a demand for cast enamel products with stone grain patterns to give them a high-class image.

Various attempts to meet this need have been disclosed; for example, Japanese Patent Application Laid-open No. 144412/1983
It is disclosed that after a casting base is glazed with a glaze having a Munsell brightness of 1'V-6 or more, a glaze having a Munsell brightness of rV-6 or less is applied, and JP-A-58-123'874 discloses that , discloses the form or means of the base for firmly applying the glaze when coloring such enamel.

[Problem to be solved by the invention]

However, such conventionally proposed methods have the disadvantage that the process is complicated, that the developed stone grain pattern has spots that bleed into the fabric, and that it is difficult to control the pattern development.

The problem to be solved by the present invention is to provide a means to industrially easily express a high-grade and calm stone-like surface pattern such as that of granite, marble, or the like.

[Means to solve the problem]

The present invention controls the appearance pattern by the particle size structure of the glaze, and the glaze is divided into a dough-forming glaze and a stone pattern-forming glaze. The above problem was solved by using a glaze for forming stone grain spots that has higher fire resistance and higher viscosity than the glaze for fabrics.

[Effect]

By mixing and baking the glaze with a regular extraction glaze to create a fabric shape and a glaze with higher fire resistance and higher viscosity than the fabric glaze as a glaze to create a stone pattern, The glaze used to create the stone millstone pattern is not melted and mixed into the glaze, creating a sharp spotted pattern.

This action is effective when the glaze for fabric formation has a diameter of 2 μm or more to 149 μm.
This becomes even more noticeable when the average particle size is set to 15 μm, and the particle size of the spot-forming glaze is set to 300 μm or more and 840 μm or less, with an average particle size of 500 μm.

If the particle size of the above-mentioned spot-forming glaze is made coarser than 840 μm, the mesh size of the sieve used for sprinkling must be made larger, which deteriorates the distribution of uniform falling from the sieve and causes problems. Uniform patterns and other defects (unevenness) are more likely to occur.

However, if the grain size becomes even finer than 300 μm, the grain pattern becomes smaller and lacks sharpness because it becomes similar to the grain size of the glaze on the fabric.

Figure 1 shows the process of creating a stone-like enamel pattern using this mixed glaze.

Referring to the figure, each step is performed in the following manner.

■ Lower glaze application: Use a spray gun to apply the lower glaze slip to a thickness of 0.05~0.
Glazed to 2Qmm, 20~60℃ at room temperature to 80℃
Let dry for a minute.

■ Lower glaze: Bake the underglaze at 950-1050°C for 9-12 minutes.

■ Top 1 sprinkling: Using a 35 mesh sieve, sprinkle the stone grain texture glaze evenly for 2 to 3 minutes.

■Top firing: To fuse the sprinkled fabric glaze, 950
Baking at a temperature of ~1050°C for 1-3 minutes.

■ Upper 2 sprinkling, ■ Upper 2 firing: Repeat the steps ■ and ■ to increase the thickness of the enamel glaze and the smoothness of the surface.

■ Top 3 sprinkles: Sprinkle the mixed glaze of the present invention evenly through a 20 mesh sieve to form stone grain spots. At this time, to make the pattern uniform, the sieve surface is leveled and glaze is sprinkled on it.

■ Upper 3 baking precepts: 950 to fuse the sprinkled dough glaze.
Baking at a temperature of ~1050°C for 1-3 minutes.

〔Example〕

Based on the process shown in Figure 1, length 1400mm x width 8
A natural stone-like stone grain pattern was created on a cast iron bathtub measuring 0.00 mm x 590 mm in height.

Glaze (frit) is SiOz45, Bz for fabric.
3 parts of a black colored pigment (li2030) was added to 100 parts of a transparent glaze mainly containing O* 10, Na20 10, Li20 10, and S+ was added for spots.
Ox 50, B2 033, Na20 15,
An antimony-based glaze containing Ll205 and Sb20s7 as main components was used.

Among these, the conditions for adjusting the mixed glaze for forming a stone grain pattern are shown in Tables 1, 2, and 3.

Table 1 Particle size M! ! I. 2. Characteristics of the stone-grained glaze. 3. Mixing ratio of the stone-grained glaze. As a result, a stone-grained pattern having the cross-sectional structure shown in FIG. 2 was obtained. In the figure, 1 indicates a casting base, and 2 indicates a lower glaze layer. The base of the stone pattern consists of the upper 1 layer 3 and the upper 2 layer 4 formed on this lower glaze layer 2.
A stone grain pattern consisting of and spots 6 is evident. Since the spots 6 had a higher fire resistance than the fabric 5 and were formed from a highly viscous glaze, the spots 6 were difficult to melt, and instead of being round, angular gray particles appeared.

〔Effect of the invention〕

The following effects can be achieved by the glaze I of the present invention.

(1) The appearance of speckled patterns can be obtained in an arbitrarily controlled manner without using special processes, equipment, or special glazes.

(2) The stone-like atmosphere has been recreated in the bathtub, and the bathroom as a whole has become more harmonious.

(3) Create a more luxurious bathroom by harmonizing with natural materials (marble, wall materials).

(4) It has become possible to change the color tone of the stones and add the flavor of natural materials to the bath itself.

[Brief explanation of drawings]

FIG. 1 shows the shape or process of a stone pattern using the glaze of the present invention, and FIG. 2 is a diagram showing the cross-sectional structure of the stone pattern obtained by this process.

Claims (2)

[Claims] 1. A glaze for forming a stone-like spotted pattern on the surface of an enamel product, which is made by mixing a dough-forming glaze with a glaze that has higher fire resistance and higher viscosity than the same dough-forming glaze. 2. In the description of claim 1, the particle size structure of the glaze for forming dough is 2 μm or more and 149 μm or less, with an average particle size of 1
A glaze for forming a stone-like spotted pattern on the surface of an enamel product.