JPH07174468A - Conveying heating furnace - Google Patents

Abstract

PURPOSE:To provide a conveying heating furnace in which oxidation, thermal deformation, rusting, dusts, etc., are prevented by passing only components of a minimum limit for holding a material to be heated in a heating chamber, and eliminating exposure of a whole conveyor to a high temperature which is structurally weak against heat. CONSTITUTION:A conveyor body 8 is passed outside of a heating chamber 14 and a heat buffer chamber 15 at a position of a furnace 3, a holder 9 stood on the body 8 is passed through a groove hole 19 of partition wall 17 and groove holes 18 of the chamber 15 and a partition wall 16, and a held material 1 to be heated is inserted into the chamber 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor heating furnace used for subjecting various industrial materials and products to heat treatment such as annealing and drying.

[0002]

2. Description of the Related Art Conventionally, when heat-treating various industrial materials or products, a batch type heating furnace capable of batch-processing a large number of articles has been generally used. When there is a heat treatment process in the line, batch processing is performed at the position of the heating furnace, so the line is cut off and production stagnation occurs, resulting in reduced production efficiency and inventory. There is an increasing number of cases in which a transfer heating furnace that can perform heat treatment is used.

However, in the conventional transfer heating furnace, since the conveyor is passed through the heating chamber and the object to be heated is transferred while being conveyed by the conveyor, the entire conveyor is exposed to a high temperature to cause oxidation or thermal deformation. There is a drawback in that rusting, dusting, and the like occur, and loosening of parts and malfunctioning of the parts cause frequent adjustments. Moreover, since it generates dust, it cannot be used in a clean room.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to make a conveyor that is structurally vulnerable to heat exposed to high temperatures as a whole, so that only the minimum parts that hold the object to be heated pass through the heating chamber. It is to provide a transfer heating furnace that prevents oxidation, thermal deformation, rusting, dusting, etc. by eliminating the above.

[0005]

In order to solve the above-mentioned problems, a conveying and heating furnace of the present invention is a conveyor device for holding and conveying an object to be heated, and a heating treatment for the object to be heated held on the conveyor device. Consisting of a furnace section, the conveyor device, on the conveyor body driven at a desired speed, a plurality of elongated heat-resistant holders for holding the object to be heated is erected at predetermined intervals, The furnace part has a heating chamber equipped with a heater, and the partition wall of the heating chamber is formed with a slot through which a holder of the conveyor device passes, and at the position of the furnace part, the conveyor body of the conveyor device is a heating chamber. Passing outside
The holder on the conveyor body is fitted into the heating chamber through the slot. A thermal buffer chamber for preventing heat convection between the heating chamber and the outside of the furnace through a slot through which the holder passes may be provided adjacent to the heating chamber.

[0006]

The object to be heated held on the holder of the conveyor device is heated by passing through the heating chamber in the furnace section while being conveyed by the conveyor device at a desired speed. At this time, at the position of the furnace portion, the conveyor body of the conveyor device is located outside the heating chamber, and only the heat-resistant holder and the object to be heated held therein are inserted into the heating chamber through the slots. The conveyor body is not exposed to high temperatures, and the conveyor body is not oxidized, thermally deformed, rusted, or dusted.

Further, the thermal buffer chamber provided adjacent to the heating chamber allows cool air from outside the furnace to directly flow into the heating chamber through the slot through which the holder is passed, or the hot air from the heating chamber remains at a high temperature in the furnace. It is prevented from flowing out, so that the temperature distribution in the heating chamber becomes non-uniform due to the inflow of cold air, and the heating of the conveyor body due to the outflow of hot air is prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a transfer heating furnace for annealing an aluminum magnetic disk substrate. The transfer heating furnace holds a object 1 to be heated and transfers it, and a conveyor device 2 held by the conveyor device 2. And a furnace section 3 for heat-treating the heated object 1.

As shown in FIG. 2, the conveyor device 2 has a plurality of elongated holders for holding the article to be heated 1 on a conveyor body 8 which is an endless track wound around drive rollers 6 and 7. 9 are erected at predetermined intervals, and the object to be heated 1 can be conveyed at a desired speed by controlling the rotation speeds of the drive rollers 6 and 7.

The conveyor body 8 has a heat resistant temperature of 150.
Any material can be used as long as it is at about ℃,
On the other hand, the holder 9 is made of a heat-resistant material such as stainless steel that can withstand heat of 700 to 800 ° C., and has a narrow shape suitable for holding the object 1 to be heated. Holding the article to be heated 1 by an appropriate method, such as fitting a part of the article to be heated 1 into the concave groove of the article or grasping a part of the article to be heated 1 with a claw provided at the upper end. Is. In the holder 9 shown in the embodiment, three support rods each having a groove at the upper end are erected vertically upward, and the disk-shaped object to be heated 1 is fitted into the groove. I am trying to let you.

Further, the furnace section 3 is disposed along the conveyor device 2, and inside the furnace box 10 having a heat insulating structure, a heating chamber 14 provided with a heater 13 and a heating chamber 14 adjacent to the heating chamber 14. And a heat buffer chamber 15 located at
4 in the partition wall 16 between the thermal buffer chamber 15 and the partition wall 17 outside the thermal buffer chamber 15, and a slot 18 slightly wider than the width of the holder 9 through which the holder 9 of the conveyor device 2 passes. , 19 are provided, and at the position of the furnace section 3, the conveyor main body 8 of the conveyor device 2 has the heating chamber 14 and the thermal buffer chamber 1.
A holding tool 9 that passes through the outside of 5 and stands upright on the conveyor main body 8.
However, the upper end portion is inserted into the heating chamber 14 through the groove hole 19 of the partition wall 17, the thermal buffer chamber 15 and the groove hole 18 of the partition wall 16.

The width of the holder 9 and the slots 18, 19 is made as narrow as possible, and the clearance between the holder and the slot is the minimum necessary for the holder 9 to move smoothly. It is desirable to keep the limit size.

The thermal buffer chamber 15 is for absorbing and relaxing thermal convection between the heating chamber 14 and the outside of the furnace, which is generated through the groove holes 18 and 19, and cool air from the outside of the furnace directly enters the heating chamber 14. In addition to preventing the inflow, the hot air in the heating chamber 14 is prevented from flowing out of the furnace at a high temperature.
The inside temperature is made uniform and the conveyor body 8 is prevented from being heated.

In the transfer heating furnace having the above-mentioned structure, the object to be heated 1 held by the holder 9 of the conveyor device 2 is transferred at a desired speed by the conveyor device 2 while being heated in the heating chamber 14 of the furnace part 3. Heat treatment is carried out by passing through. At this time, at the position of the furnace part 3, the conveyor body 8 of the conveyor device 2 is located outside the heating chamber 14 and the thermal buffer chamber 15, and the holder 9 penetrating the slots 18, 19 and the thermal buffer chamber 15 is provided. Since only the article 1 to be heated held therein is located in the heating chamber 14, the conveyor body 8 is not exposed to high temperature, and therefore, the conveyor body 8 is oxidized or thermally deformed due to heating, rusting, No dust is generated. Therefore, the transfer heating furnace can be used in a clean room.

The air in the heating chamber 14 is heated by the heater 13
It is heated by the convection and flows out into the thermal buffer chamber 15 from the groove hole 18. The hot air that has flowed out stays in the upper portion of the thermal buffer chamber 15 on the side of the heating chamber 14 and the portion is heated to the temperature inside the heating chamber. Keep high temperature close to. Therefore, the heating chamber 14 passes through the slot 18.
Even if air flows between the heat buffer chamber 15 and the heat buffer chamber 15, the temperature of the air inside the heat chamber 14 hardly changes because the air flowing from the heat buffer chamber 15 into the heating chamber 14 has a high temperature. It will be kept constant and uniform.

On the other hand, even if cold air flows into the thermal buffer chamber 15 from the outside of the furnace through the slot 19, the cold air is warmed in the thermal buffer chamber 15 and therefore can flow into the heating chamber 14 at a low temperature. Absent. Moreover, since the lower portion of the thermal buffer chamber 15, that is, the portion on the side of the slot 19 is kept in a low temperature state due to the retention of air having a relatively low temperature, the thermal buffer chamber 15
Even if the air flows out of the furnace, the conveyor main body 8 is not heated thereby.

The thermal buffer chamber 15 includes a holder 9 and a slot 1
8 and 19 as narrow as possible, these slot 18,
It can be omitted by reducing the heat convection generated through 19.

FIG. 3 shows a second embodiment of the present invention.
In this embodiment, the furnace box 20 in the furnace section 3 has a double structure of an inner box 21 and an outer box 22, a heating chamber 24 provided with a heater 23 is provided in the inner box 21, and an inner box is provided in the outer box 22. Two
1, a heat buffer chamber 25 is formed so as to surround 1, and the lower partition walls 21a and 22a of the inner box 21 and the outer box 22 have slots 28 and 29 through which the holder 9 passes, and the upper partition wall 21b of the inner box 21 has a heating chamber 24. A through hole 30 is formed to connect the heat buffer chamber 25 with the heat buffer chamber 25.

In the second embodiment, the hot air in the heating chamber 24 flows into the thermal buffer chamber 25 through the slots 28, 29 and the through hole 30 and circulates in the thermal buffer chamber 25. On the other hand, even if cold air from the outside of the furnace flows into the thermal buffer chamber 25 through the slot 29, the cold air is warmed in the thermal buffer chamber 25,
The low temperature is prevented from flowing into the heating chamber 24. Moreover, the lower portion of the thermal buffer chamber 25, that is, the portion on the groove 29 side,
Since the air is kept at a low temperature due to the retention of the air having a relatively low temperature, even if the air flows out of the furnace from the thermal buffer chamber 25, the conveyor body 8 is not heated by the air.

[0020]

As described above, according to the present invention, the conveyor main body passes through the outside of the heating chamber, and only the heat-resistant holder standing on the conveyor main body holds the object to be heated and passes through the heating chamber. Since it is configured as described above, it is possible to reliably prevent oxidation, thermal deformation, rusting, dust generation, etc. due to high temperature heating of the conveyor body, which is relatively weak to heat, and prevent material deterioration due to heating, and durability of the conveyor device. And the length of the conveyor device need not be readjusted due to thermal expansion. Moreover, since it does not generate dust, it can be introduced into the production line process as a transfer heating furnace used in a clean room, and the economic effect thereof is very large.

Further, since the thermal buffer chamber is provided adjacent to the heating chamber, cold air from the outside of the furnace flows into the heating chamber through the slot through which the holder is passed, or the hot air from the heating chamber remains at the high temperature. It is possible to prevent the air from flowing out, and prevent the temperature change in the heating chamber due to the inflow of cold air and the heating of the conveyor body due to the outflow of hot air.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a transfer heating furnace according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the transfer heating furnace shown in FIG.

FIG. 3 is a cross-sectional view showing a second embodiment of the transfer heating furnace according to the present invention.

[Explanation of sign]

DESCRIPTION OF SYMBOLS 1 Heated object 2 Conveyor device 3 Furnace part 8 Conveyor body 9 Holding device 13,23 Heater 14,24 Heating chamber 15,25 Thermal buffer chamber 16,21a, 22a Partition wall 18,19,2
8,29 slot

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuneji Kiryu 4-1, 10 New Product, Nagaoka City, Niigata Prefecture Clean Technology Co., Ltd. (72) Inventor Tadashi Suzuki 4 New product, Nagaoka City, Niigata Prefecture 1-chome 10 Clean Technology Co., Ltd.

Claims (2)

[Claims] 1. A conveyor device that holds and conveys an object to be heated, and a furnace section that heats the object to be heated held on the conveyor device, wherein the conveyor device is driven at a desired speed. On the conveyor main body to be formed, a plurality of elongated heat-resistant holders for holding the object to be heated are provided upright at predetermined intervals, and the furnace part has a heating chamber equipped with a heater,
A partition hole of the heating chamber is formed with a slot through which the holder of the conveyor device passes, and at the position of the furnace part, the conveyor body of the conveyor device passes outside the heating chamber, and the holder on the conveyor body is grooved. A transfer heating furnace, which is fitted into the heating chamber through a hole. 2. A thermal buffer chamber is provided adjacent to the heating chamber to prevent heat convection between the heating chamber and the outside of the furnace through a slot through which the holder is passed. Item 2. The transfer heating furnace according to Item 1.