JPH1059514A - Heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating apparatus which can attain energy saving by reducing the endothermic amount of a carrier belt. SOLUTION: This heating apparatus is provided with two or more metallic or ceramics carrier belts 2 which consist of endless linear or band plate-shaped material respectively with substrate products 1 aligned and loaded and are constituted by being tensed on a pulley 5 and a pulley 6 in parallel, driving the carrier belts 2 through the pulley 5 with a driving motor 3, and inserting the inside of a furnace body 4 which has a heater in it. It is thus possible to improve heat utilization efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus for firing and forming a resistor, a conductor, and the like formed on a ceramic substrate by printing.

[0002]

2. Description of the Related Art As a conventional heating apparatus of this type, for example, FIGS. 5 and 6 show a firing furnace for a chip resistor.

[0003] This firing furnace includes a substrate product 11 made of a ceramic base material before a thick film is printed on one surface and divided into chip resistors, and a substrate product 11 having a wire diameter of 2 mm for loading and transporting the substrate product 11.
Endless conveyance belt 12 having a width of 1 m, which is formed by knitting stainless steel wires in a grid at a pitch of 8 mm, and pulleys 15 and 16 for holding and stretching the conveyance belt 12
A drive motor 13 for rotating the pulley 15 to drive the transport belt 12 and a heater (not shown) for heating the substrate product 11 loaded and transported on the upper surface of the belt 12 to a predetermined temperature. It has a built-in furnace body 14.

[0004]

However, since the transfer belt 12 having the above-mentioned conventional structure absorbs a large amount of heat supplied from the heater of the furnace body 14, it is actually used for firing the substrate product 11. The heat utilization efficiency is as low as, for example, about 4% as an actually measured value. In order to increase the heat utilization efficiency, a transport belt having a small heat absorption amount was required.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a heating device provided with a transport belt having a small heat absorption.

[0006]

In order to solve the above-mentioned problems, a heating device according to the present invention comprises:
A heating unit that heats at least a part of the transport unit, and a drive unit that drives the transport unit, the transport unit is a transport belt made of a metal wire or band-shaped material formed in an endless shape. At least two or more of them are arranged in parallel and stretched.

According to the present invention, the efficiency of heat utilization can be improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to a first aspect of the present invention is directed to a conveying section for conveying an object to be heated, a heating section for heating at least a part of the conveying section, and a drive for driving the conveying section. And a heating device in which the transporting unit is configured by stretching at least two or more transporting belts made of a metal wire or a band-shaped material formed in an endless shape in parallel. In addition, it has the effect of reducing the volume and mass of the transport belt and reducing the amount of heat absorbed.

According to a second aspect of the present invention, there is provided the heating apparatus according to the first aspect, wherein a holding portion for holding the object to be heated is provided at a corner on the conveying surface side of the conveying belt. Has the effect of stabilizing.

According to a third aspect of the present invention, there is provided the heating device according to the first or second aspect, wherein the conveying belt made of a wire or a strip is formed of a ceramic material. It has the effect of improving wear properties.

Hereinafter, a heating device according to an embodiment of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a perspective view of a main part of a heating device according to an embodiment, and FIG. 2 is a sectional view of the main part.

In FIGS. 1 and 2, reference numeral 1 denotes a substrate product, and a resistor, an electrode, an insulator, and the like are printed on one or both sides of a ceramic substrate having a thickness of about 1 mm and an outer shape of 50 × 60 mm in a thick film. .

The transport section includes three transport belts 2 each having an endless shape of a stainless wire or a strip-shaped material,
Pulleys 5 and 6 for stretching and rotating the conveyor belt 2
It consists of.

The drive section comprises a drive motor 3 for driving the transport belt 2 stretched over the pulleys 5 and 6.

In the heating section, a furnace body 4 of about 10 m is formed so as to wrap the transport belt 2 of the transport section.
For example, a heater for heating and firing (not shown) for heating the furnace 4 to about 850 ° C. is installed around the inside of the furnace body 4 at, for example, a central portion.

Next, the operation will be described.
The substrate product 1 is moved inside the furnace body 4 at a speed of, for example, about 150 mm / sec by the rotation of the drive motor 3 at a constant speed of one hour. Approximately 1200 thick-film-printed elements are fired.

The overall weight of the conveyor belt 2 constructed as described above can be reduced to about one half or more of the conventional conveyor belt 12 in which stainless steel wires are woven in a lattice shape.

Further, the conveyor belt 2 composed of the stainless steel wire or the strip-shaped member in the first embodiment and the conveyor belt 12 of the conventional example in which stainless wires are knitted in a lattice shape.
Since they are the same stainless steel material, they have the same specific heat, and therefore the heat absorption is the same as the weight difference between them, so that the heat absorption is reduced to about 1/2 or less.

Since the amount of heat absorbed by the conventional conveyor belt 12 with respect to the total amount of heat of the furnace body 4 is about 1/4 (about 25%), the amount of heat absorbed by the present invention is about 1/2 or more than that of the conventional as described above. Therefore, the product is reduced to about 1/8 (12.5%). As a result, the heat loss of about 12.5% can be reduced, and energy can be saved.

Although the transport belt 2 is made of stainless steel in the first embodiment, it may be made of a ceramic heat-resistant and wear-resistant material.

(Embodiment 2) FIG. 3 is a sectional view of a main part of a heating apparatus according to another embodiment of the present invention. Since the entire configuration is almost the same as the content described with reference to FIG.
A description of them will be omitted.

In FIG. 3, reference numeral 7 denotes a plurality of transport belts made of a metal or ceramic material having a deformed hexagonal cross-sectional shape, and both ends of the substrate product 1 are held by respective inclined plane holding portions of the transport belt 7. keeping.

The transport belt 7 configured as described above is
The substrate product 1 can be stably held and transported with a simple structure and a small transport belt volume and mass.

In the second embodiment, the cross-sectional shape is a modified hexagon. However, as shown in FIGS. 4 (a) to 4 (e), there is provided an inclined plane or step surface holding portion for holding the substrate product 1. A similar effect can be obtained with a structure.

In the above description, the transport belt 2 and the transport belt 7 have been described as an example having a continuous single annular endless shape. However, the present invention can be similarly implemented as a chain-type connected endless belt. is there.

[0026]

As described above, the heating device according to the present invention has the following features.
At least two or more endless belts made of metal or ceramic wires or strips are stretched in parallel to form a transport unit that transports the object to be heated. This has the effect of reducing the amount of heat and saving energy in the firing furnace, that is, the furnace body.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a heating device according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the same.

FIG. 3 is a sectional view of a main part of a heating device according to another embodiment.

FIGS. 4A to 4E are cross-sectional views of the transport belt.

FIG. 5 is a perspective view of a main part of a conventional heating device.

FIG. 6 is a sectional view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate product 2 Transport belt 3 Drive motor 4 Furnace body 5 Pulley 6 Pulley 7 Transport belt

Claims (3)

[Claims] 1. A transport section for transporting an object to be heated, a heating section for heating at least a part of the transport section, and a drive section for driving the transport section, wherein the transport section is formed in an endless shape. A heating device configured by arranging and stretching at least two or more transport belts made of a metal wire or a strip-shaped material. 2. The heating device according to claim 1, wherein a holding portion for holding the object to be heated is provided at a corner on the conveyance surface side of the conveyance belt. 3. The heating device according to claim 1, wherein the transfer belt made of the wire or the strip is formed of a ceramic material.