JPH072893U - Gas kiln for firing ceramics - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a gas kiln for firing ceramics that can be used in ordinary households. [Structure] Ceramic kiln gas kiln has an internal volume of approximately 6000
A kiln body 1 which is surrounded by a fireproof heat insulating board so as to have a width of about ³ cm ³ and is provided with a flame blowing port 1d and an exhaust port 1e, and a kiln which faces the kiln body 1 with a distance from the flame blowing port 1d. Fireproof screen 1f standing inside the main body 1
A burner member having a cassette type gas cylinder 3 for a portable stove, which is filled with a combustible gas, and detachable from the head of the cassette type gas cylinder 3, and having at least a control valve 4a and a flame nozzle 4b. It consists of 4 and
The cassette type gas cylinder 3 is arranged such that the flame nozzle 4b of the burner member 4 faces the flame blowing port 1d of the kiln body 1 from the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas kiln for firing ceramics, which is most suitable for personal and home use.

[0002]

[Prior art]

 Currently, there are gas kilns, electric kilns, kerosene kilns, etc. as kilns for firing ceramics. By the way, in recent years, hobbies have diversified, and the number of ceramic art lovers who enjoy making and making ceramics at home is increasing. Small electric kilns for burning ceramics that can be installed in ordinary households are commercially available for such ceramic lovers.

[0003]

[Problems to be solved by the device]

 However, since the small electric kiln uses nichrome wire for the heating element, it is very expensive, the cost required for one firing is high, and there is a functional limitation that reduction firing cannot be performed. Ceramic art enthusiasts are trying to enjoy making original works by making full use of various techniques, so electric kilns that are limited to oxidative firing cannot fully meet the needs of ceramic art lovers. On the other hand, the gas kiln, which can be fired most like a wood-fired kiln, is currently used industrially a lot, but since it uses refractory bricks, there is a limit to its compactness, and only complicated regulators, etc. It is unsuitable for pottery lovers to use at home, as it is expensive because it is necessary. The present invention has been made in view of the above, and an object thereof is to provide a gas kiln for firing ceramics that can be used in ordinary households.

[0004]

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a kiln body which is surrounded by a fireproof heat insulating board so as to have an inner volume of about 6000 cm ^3, and which is provided with a flame blowing port and an exhaust port. A fire-resistant screen that is erected inside the kiln body so as to face each other at a distance from the mouth, a cassette-type gas cylinder for a portable stove that is filled with flammable gas, and the head of the cassette-type gas cylinder And a burner member having at least a control valve and a flame nozzle, and the cassette gas cylinder is arranged so that the flame nozzle of the burner member faces the flame blowing port of the kiln body from the outside. To provide a gas kiln for firing ceramics. In addition, it is preferable to provide an intake area with adjustable spacing between the flame nozzle and the flame blowing port.

[0005]

[Action]

When a burner member is attached to a cassette-type gas cylinder for a portable stove and a flame is emitted from a flame nozzle, the flame enters the kiln body from the flame injection port and heats the inside. Next, adjust the flame intensity with the control valve to gradually raise the temperature inside the kiln body. Since the kiln body has an internal volume of about 6000 cm ^3, it is possible to raise the temperature to about 1200 ° C, which is sufficient for firing ceramics, with the flame of a cassette-type gas bomb. Further, by appropriately adjusting the size of the intake region provided between the flame nozzle and the flame blowing port within a range of about 0 to 1 cm, the amount of oxygen supplied into the kiln body can be adjusted. It is possible to freely switch between oxidation firing and reduction firing.

[0006]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a gas kiln for firing ceramics, FIG. 2 is a vertical side view of the same, and FIG. 3 is a cross-sectional plan view of the same. A gas kiln for firing ceramics comprises a kiln body 1, a base 2 supporting the kiln body 1, a cassette type gas cylinder 3 as fuel, and a burner member 4 attached to the head of the cassette type gas cylinder 3. , Is roughly composed of. The kiln body 1 includes a box-shaped member 1a having an open upper surface, a plate-like lid 1b covering the upper surface of the box-shaped member 1a, and an exhaust pipe 1c protruding from the rear side surface r of the box-shaped member 1a. It consists of. The kiln body 1 is made of, for example, a fireproof heat-insulating board made of ceramic fiber, and the size of each side is set so that the inner volume of the box-shaped member 1a is about 6000 cm ³ . The kiln body 1 is provided with a circular flame injection port 1d on the front side face f, and an exhaust port 1e communicating with the exhaust pipe 1c on the rear side face r. Inside the kiln body 1, a fire-resistant partition 1f is erected so as to face the flame blowing port 1d at a distance. The material of the fireproof screen 1f is also the same as that of the fireproof heat insulating board. The exhaust pipe 1c is covered with a detachable adjustment panel 1g on the front surface of the upper end of the lid 1b. By attaching and detaching the adjusting panel 1g, the length of the exhaust pipe 1c can be adjusted, and thus the amount of oxygen in the kiln body 1 can be adjusted by the same principle as that of the existing gas kiln.

A base 2 supporting the kiln body 1 is composed of three building bricks. The base 2 may be made of metal or earthenware in the shape of a tower. As the cassette type gas cylinder 3, a commercially available product for a portable stove, which is filled with about 250 g of combustible gas, is used as it is. The head of the cassette type gas cylinder 3 is provided with a locking brim (not shown) for attaching / detaching to / from the portable stove. The locking brim is used to attach / detach to / from the head of the cassette type gas cylinder 3. The burner member 4 is also commercially available as a general tool at present (for example, a product name "UNITORCH-OD" manufactured by Uniframe Co., Ltd.). The burner member 4 is provided with an adjusting valve 4a for adjusting the size of the flame and a flame nozzle 4b for injecting the flame, and the cassette type gas cylinder 3 can be used as a fuel to inject the flame vigorously.

As shown in FIGS. 1 and 2, in the kiln body 1 and the cassette type gas cylinder 3, the flame injection port 1d of the kiln body 1 on the base 2 and the flame nozzle 4b of the burner member 4 face each other. Arranged to do so. The cassette type gas cylinder 3 is on the floor and is self-supporting, and its position can be freely changed. Therefore, by moving the position of the cassette type gas cylinder 3, it is possible to form an intake region 5 of any size between the flame nozzle 4b and the flame blowing port 1d. In the embodiment, the intake area 5 is set to about 0 to 1 cm.

Next, a method of using the gas kiln for firing ceramics of the present invention will be described. First, the lid 1b of the kiln body 1 is opened, and the material to be fired is set between the fireproof screen 1f and the exhaust port 1e. Next, the burner member 4 is attached to the cassette type gas cylinder 3, and the cassette type gas cylinder 3 is placed on the floor so that the flame nozzle 4b and the flame blowing port 1d face each other. At this time, the width of the suction area 5 of the flame nozzle 4b and the flame blowing port 1d is set to about 1 cm. Then, the control valve 4a of the burner member 4 is opened and ignited, and the flame is radiated to the flame injection port 1d. Then, the flame hits the refractory screen 1f through the flame blowing port 1d, and heats the inside of the kiln body 1 substantially evenly. As described above, since the intake region 5 is opened by about 1 cm, sufficient oxygen is supplied to the inside of the kiln body 1, so that oxidation firing is performed. In this state, the size of the flame is adjusted by the adjusting valve 4a of the burner member 4 to appropriately adjust the temperature inside the kiln body 1. According to experiments, it is possible to increase to about 1200 ° C. The temperature of the kiln the body 1 by the capacity of the cassette type gas cylinder 3 as long as the internal volume of the kiln main body 1 is about 6000 cm ^3.

Next, when performing reduction firing as needed, the cassette type gas cylinder 3 is moved to the side of the kiln body 1 to bring the flame nozzle 4b into contact with the flame blowing port 1d, and the intake area 5 is almost Set to 0 ". Then, since oxygen is not supplied from the intake region 5, the inside of the kiln body 1 is in an oxygen-deficient state, and reduction firing is performed. In order to carry out reduction firing, in addition to the method of adjusting the intake region 5 as described above, a method of adjusting the length of the exhaust stack 1c in the same manner as used in industrial gas kilns. There is. In this embodiment, since the adjusting panel 1g is provided on the front surface side of the exhaust tube 1c as described above, it is possible to switch between the oxidation firing and the reduction firing by attaching and detaching the adjustment panel 1g.

Then, when the object to be fired has been sufficiently baked, the adjustment valve 4a of the burner member 4 is closed to extinguish the fire, and the kiln body 1 is left until it is sufficiently cooled. Normally, one cassette type gas cylinder 3 is used for one firing, but if the object to be fired is thick or the amount of the object to be fired is large, two cassette type gas cylinders 3 may be used as needed. Use more than a book.

Although the present invention has been described with reference to the embodiments, the present invention is of course not limited to the above embodiments. For example, in the embodiment, the inner volume of the kiln body 1 is set to about 6000 cm ³ which is the best result obtained in the experiment, but even if the inner volume of the kiln body 1 is larger than the range that can be fired by the cassette type gas cylinder 3 for the portable stove. It may be small. Further, although the cassette type gas cylinder 3 is made to stand on the floor in the embodiment, the cassette type gas cylinder 3 is fixed by providing an appropriate holder, and the holder can be slid to move the cassette type gas cylinder 3. None, so that the intake region 5 may be adjusted appropriately. By using such a holder, the cassette-type gas cylinder 3 becomes stable and the risk of tipping over is eliminated. Further, a thermometer may be provided in the kiln main body 1 of the embodiment to serve as a guide for flame adjustment.

[0013]

[Effect of device]

The gas kiln for firing ceramics of the present invention is an organic combination of a kiln body 1 having an internal volume of about 6000 cm ³ , a cassette type gas cylinder 3 and a burner member 4, so that even a simple cassette type gas cylinder can burn the inside of the kiln body 1 It is possible to raise the temperature to 1200 ° C. which is necessary and sufficient. By the way, the current small electric kiln has a cassette gas cylinder 3 that is not equipped with the function to raise the temperature up to 1200 ° C due to the cost constraint to set the price at a level that can be purchased individually. Since the burner member 4 can use the existing mass-produced product as it is, the total manufacturing cost is significantly lower than that of the electric kiln. Also, the fuel consumption for one firing is about 100 yen, which is the current price of one cassette type gas cylinder, so it is ideal for single product production. The kiln body 1 has an internal volume of around 6000 cm ^3. As a result, it is compact with a side of 30 cm or less in external dimensions, and because it is lightweight because it is composed entirely of fireproof insulation boards, it is easy to carry and it does not take up much space. Since it can handle both oxidative firing and reduction firing, it does not have the functional restrictions of an electric kiln and can fully satisfy the needs of ceramic art lovers. In particular, when the intake region 5 whose distance can be adjusted is provided between the flame blowing port 1d and the flame nozzle 4b as in claim 2, the switching between the oxidation firing and the reduction firing can be performed extremely easily and smoothly. , And so on. In short, the gas kiln for firing ceramics of the present invention has a function superior to the conventional small electric kiln, but can reduce the price by about 1/3, and has an excellent effect in promoting the spread of pottery. To do.

[Brief description of drawings]

FIG. 1 is a perspective view of a gas kiln for firing ceramics.

FIG. 2 is a vertical sectional side view of a gas kiln for firing ceramics.

FIG. 3 is a cross-sectional plan view of a gas kiln for firing ceramics.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Kiln main body 1d ... Flame injection port 1e ... Exhaust port 1f ... Fireproof partition 3 ... Cassette gas cylinder 4 ... Burner member 4a ... Control valve 4b ... Flame nozzle 5 ... Intake area

Claims (2)

[Scope of utility model registration request] 1. A kiln body which is surrounded by a fireproof heat insulating board so as to have an inner volume of about 6000 cm ³ and has a flame inlet and an exhaust outlet, and a distance from the flame inlet. A fire-resistant screen that is erected inside the kiln body so as to face each other, a cassette-type gas cylinder for a portable stove that is filled with a combustible gas, and a detachable mount on the head of the cassette-type gas cylinder. A burner member having at least a control valve and a flame nozzle, wherein the cassette type gas cylinder is arranged such that the flame nozzle of the burner member faces the flame blowing port of the kiln body from the outside. Gas kiln for firing. 2. The gas kiln for porcelain firing according to claim 1, wherein an intake region with adjustable spacing is provided between the flame nozzle and the flame blowing port.