JPH0346420B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a method for manufacturing painted ceramics such as tea bowls and plates, in which a glaze is applied to the painted portion of the ceramic base before applying glaze to the ceramic base with the painted sketch. A method for producing painted ceramics including a process of surface firing, and
This article relates to a device used for surface baking.

Conventional technology The general manufacturing method for painted ceramics such as bowls and plates is to unglaze a ceramic base formed by pressure casting or mechanical potter's wheel, and then apply pigments such as metal oxides to the surface of the ceramic base. The sketch is colored by printing or hand-painting using paint mixed in an aqueous solution of a binder such as CMC, ethylene glycol, or starch glue, and then a glaze is applied to the surface and the final firing is performed. It's summery.

Problems to be Solved by the Invention By the way, when applying glaze using the above method, since the binder in the paint has already soaked into the painted area of the ceramic base, the underpainted area, especially The caking agent mixed into the glaze does not soak into the darkly colored sketch areas.
The glaze runs down and the thickness of the glaze varies between the underpainting and other areas, creating unevenness on the surface of the ceramic product after it has been fired, resulting in a poor appearance. The fact is that the formation of such unevenness is unavoidable, and no measures have been taken to improve it.

The present invention was completed in order to improve the above-mentioned problems, and it enables the glaze to be applied uniformly to the entire surface of the ceramic base, including the painted part of the sketch, so that the painted part does not have unevenness on the surface. The purpose is to manufacture ceramics.

Means for Solving the Problems In order to achieve the above object, the method for producing painted ceramics, which is the first invention of the present invention, is a method for producing colored ceramics, which is a first invention of the present invention. After coloring, flame is sprayed onto the sketch to burn off the binder, glaze is applied, and then fired. In this method, a nozzle that sprays a flame toward the ceramic base on the conveyor is placed near the conveyor that carries the unglazed ceramic base painted with paint mixed with pigment and binder in one direction. The structure is as follows.

Effect Since the present invention has the above-described configuration, while a ceramic base having a colored sketch painted on a part of its surface is conveyed in one direction by a conveyor, flame is blown from a nozzle onto the sketched portion, and As a result, the binder in the paint that had soaked into the ceramic base is burnt out, leaving only the pigment, and when glaze is applied in the next process, the glaze covers the entire surface of the ceramic base, including the painted area. The binder inside soaks in and the glaze is evenly applied, and the subsequent firing process produces painted ceramics with no irregularities on the surface.

Embodiments Hereinafter, embodiments of the surface firing apparatus for painted ceramics of the present invention will be explained based on the attached drawings, and examples of the method for producing painted ceramics of the present invention will be explained by explaining its operation and the steps before and after the same. reveal.

In FIGS. 1 to 3, reference numeral 1 denotes the main body of the surface baking device, which has an elongated shape in the left-right direction in FIGS.
The main body 1 can be moved freely on the floor, and can be fixed at any position using a fixing device 3.A horizontal support plate 5 is stretched over the top surface of the main body 1, and its periphery is covered with a cover 6. A drive sprocket 7 connected to a drive motor (not shown) installed in the main body 1 is supported by a shaft 8 on one end side of the support plate 5, and a driven sprocket (not shown) is pivotally supported on the other end side. An endless chain conveyor 10 is stretched between the driving sprocket 7 and the driven sprocket, and this chain conveyor 10 carries a plurality of running rollers 11 attached to the lower surface of the chain conveyor 10 on the support plate 5 to maintain a constant height. The chain conveyor 10 has a plurality of mounting shafts 13 formed on link plates at regular intervals and passing through the chain conveyor 10 in the vertical direction. A teacup base material a is fitted into the fitting hole 14 and supported only for rotation, and is attached to the upper end of each mounting shaft 13 protruding from the upper surface of the cover 6.
A pallet 15 for placing the is fixed, and a sprocket 16 is fixed to the lower end.

In the travel path of the chain conveyor 10 described above, as shown in FIG. The straight running part of the length is at the flame spraying position B, and an endless auxiliary chain 18 is supported outside of the flame spraying position B along the chain conveyor 10 passing through the flame spraying position B. A pair of drive sprockets 19 pivotally supported on plate 5
and a driven sprocket 20, and is configured to circulate in the same direction as the chain conveyor 10 by the driving force of a motor 21 connected to a drive sprocket 19. A guide plate 23 attached to the support plate 5 between the two presses the inner linear running part toward the chain conveyor 10 so that it meshes with the sprocket 16 at the lower end of the mounting shaft 13 running at the flame spraying position B. It's summery.

In addition, on the outside of the flame spraying position B of the main body 1,
An LP gas supply pipe 25 is arranged, and this supply pipe 2
Five branch pipes 26 branched from the support plate 5 penetrate the support plate 5 and protrude from the upper surface thereof, and a nozzle 27 having a circular spout for ejecting flame is attached to the tip of each branch pipe 26. Two nozzles 27 out of 27 are directed toward the inner surface of the bowl base a from above, and the other three nozzles 27 are directed at different angles to the outside of the bowl base a from the side. Flame spraying position B is the entrance 3 of the chain conveyor 10
0 and an outlet 31, and a cooling device (not shown) is installed in front of the flame blowing position B in the conveying direction to apply cold air to the bowl base a.

Next, the operation of this embodiment will be explained.

After bisque firing the bowl base a, a rough sketch is applied to the inner and outer surfaces of the bowl base a by printing or hand-painting using a pigment mixed in an aqueous solution of a binder such as CMC, ethylene glycol, or starch paste. The colored teacup base a of this sketch is
When placed on the pallet 15 at the transfer position A, the chain conveyor 10 travels to sequentially convey it to the flame spraying position B.
During the process, the auxiliary chain 18 and the sprocket 16 of the mounting shaft 13 engage with each other, causing the mounting shaft 13 and the pallet 15 to rotate around their axes, and the bowl material a is conveyed while rotating. Flame is directly blown onto the inner and outer surfaces of the bowl base a from 27, thereby causing the bowl base a to
The binder in the paint that had soaked into the sketch area is burnt off, leaving only the pigment.Next, the bowl base a is cooled by the cooling device, and when it returns to the above-mentioned transfer position A, the pallet is removed. It is taken out from 15.

Next, when this tea bowl base a is immersed in a glaze bath, the binder in the sketch area has been burned off by the surface firing process, so the entire surface of the tea bowl base a, including the sketch area, is immersed in the glaze. The binder soaks in and the glaze is evenly applied, and the subsequent firing process completes the painted bowl with no irregularities on the surface.

Note that the rotational speed of the bowl base a while passing through the flame spraying position B can be arbitrarily changed by changing the running speed of the auxiliary chain 18.

In addition, in the above embodiment, the case where the surface of the bowl base a was baked was explained, but like a plate,
If the sketch is colored only on the top surface and it is only necessary to perform surface baking on the top surface, as shown in FIG. Dish base b
During the conveyance, a nozzle 31 having an elongated slit-shaped spout is placed across the top of the bar conveyor 30.
Alternatively, the surface may be baked by blowing flame like an air curtain toward the top surface of the dish base b.

Effects of the Invention As explained above, according to the method for manufacturing painted ceramics of the present invention, before glazing for final firing, the binder in the paint that has soaked into the sketch area of the ceramic base is burned out, During glazing, the glaze can be uniformly applied to the entire surface of the ceramic base, including the underpainting, and it is possible to produce painted ceramics with a good appearance without any unevenness on the surface. Since the binder is sprayed directly onto the area to burn it off, it is more economical and saves fuel compared to heating the entire ceramic body in a closed furnace to burn off the binder. Since the core of the base material is not heated, it can be cooled in a short time and the glazing process can be started in a short time, which has the effect of improving production efficiency. According to the surface-burning device, it is possible to reliably perform the surface-burning of the sketch portion of the ceramic base described above.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of one embodiment of the device of the present invention, Fig. 2 is a partially cutaway plan view thereof, Fig. 3 is a partially enlarged perspective view thereof, and Fig. 4 is a partially cutaway front view of one embodiment of the device of the present invention. FIG. a: Tea bowl base, b: Plate base, 10: Chain conveyor, 13: Mounting shaft, 15: Pallet, 16:
Sprocket, 18: Auxiliary chain, 27: Nozzle, 30: Bar conveyor, 31: Nozzle.

Claims (1)

[Scope of Claims] 1. After painting a sketch on a bisque-fired ceramic base with a paint containing a pigment and a binder, blowing flame onto the sketch to burn off the binder, glazing, and firing. A method for producing painted ceramics characterized by: 2. A nozzle that sprays a flame toward the ceramic base on the conveyor was placed near the conveyor on which the unglazed ceramic base painted with a pigment mixed with a binder was placed and conveyed in one direction. This is a surface firing device for painted ceramics. 3. The conveyor according to claim 2, wherein the table on which the ceramic blank is placed is a rotating table, and the rotating table is adapted to rotate at least at the flame spraying position. Surface firing device for painted ceramics.