JPH051887A - Heat treatment device - Google Patents

Abstract

PURPOSE:To obtain a simplified, miniaturized and economical heat treatment device capable of heating or cooling a work uniformly. CONSTITUTION:An air feeding duct 41 and an air discharging duct 42 are connected to another air feeding duct 32 and another air discharging duct 31, which are connected to a treating chamber in which a work is received, in a relation that the former are intersected with the latter orthogonally while a fan 61 is interposed in either one of the air feeding duct 41, or the air discharging duct 42 and a switching damper 51 is mounted in the orthogonally intersecting section between the air feeding and discharging ducts 31, 32 and the air feeding duct 41 as well as the air discharging duct 42.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a heat treatment apparatus. Various heat treatment apparatuses are used to heat or cool a material to be processed such as a metal material or a ceramic material with a heating gas or a cooling gas such as air or nitrogen gas. The present invention relates to an improvement of such a heat treatment apparatus.

[0002]

2. Description of the Related Art Conventionally, as a heat treatment apparatus for a material to be processed, an air supply duct and an exhaust duct are connected to a processing chamber, and a fan is provided in either one of the air supply duct and the exhaust duct. Things are being used. This conventional apparatus heats or cools the material to be processed stored in the processing chamber by rotating a fan so that a heating gas or a cooling gas is circulated in a path of an air supply duct → a processing chamber → a material to be processed → an exhaust duct. Is to do. However, this conventional apparatus has a basic defect that the material to be treated cannot be uniformly heated or uniformly cooled because the heated gas or the cooled gas is passed through the processing chamber only from one direction.

Further, conventionally, as a heat treatment apparatus for a material to be treated,
Two lines of air supply and exhaust ducts are connected to the processing chamber.
A switching damper is attached to each of the supply / exhaust ducts of the system, and a fan is used at a collective portion of the supply / exhaust ducts of the two systems. This conventional device
By rotating the fan and operating the switching damper to open and close the material to be processed stored in the processing chamber, heating gas or heat is generated in the path of one air supply / exhaust duct → processing chamber → material to be processed → other air supply / exhaust duct. The cooling gas is circulated, and the heating gas or the cooling gas is circulated in the path of the other air supply / exhaust duct → processing chamber → processed material → one air supply / exhaust duct to heat or cool. However, in this conventional apparatus, since the heating gas or the cooling gas is passed through the processing chamber from two reversible directions, the material to be treated is more uniform than the conventional apparatus in which the heating gas or the cooling gas is passed from only one direction. Although it has an advantage that it can be heated or uniformly cooled, it has a drawback that it is uneconomical because the device becomes complicated and large.

[0004]

The problem to be solved by the present invention is that the conventional apparatus cannot uniformly cool the material to be treated, or the apparatus becomes complicated and large in size, which is uneconomical.

[0005]

SUMMARY OF THE INVENTION According to the present invention, however, an air supply duct and an exhaust duct are connected to a processing chamber, in which a material to be processed is accommodated, through an air supply / exhaust duct in a relationship orthogonal to the air supply / exhaust duct. A fan is provided in either one of the air supply duct and the exhaust duct, and a switching damper is installed in a portion orthogonal to the air supply and exhaust duct and the air supply duct and the exhaust duct. The present invention relates to a heat treatment apparatus.

In the present invention, the air supply duct and the air exhaust duct are connected to the processing chamber, in which the material to be processed is accommodated, through the air supply and exhaust duct in a relationship orthogonal to the air supply and exhaust duct.
A fan is provided in either one of the air supply duct and the exhaust duct. Further, a switching damper is attached to the air supply / exhaust duct and a portion orthogonal to the air supply / exhaust duct, which is orthogonal to the air supply / exhaust duct.

[0007]

When the switching damper is rotated and both edges of the switching damper are joined to the connection portion between the air supply duct and the other air supply / exhaust duct and the connection portion between the exhaust duct and one air supply / exhaust duct,
The air supply duct and the one air supply / exhaust duct communicate with each other, and the exhaust duct and the other air supply / exhaust duct communicate with each other. When the fan is rotated in this state, the heated gas or the cooled gas flows in the route of the air supply duct → switching damper → one supply / exhaust duct → processing chamber → processed material → other supply / exhaust duct → switching damper → exhaust duct. Circulate. The switching damper is 45
When the two edges of the switching damper are joined to the connection between the air supply duct and one air supply / exhaust duct and the connection between the exhaust duct and the other air supply / exhaust duct, the air supply duct and the other air supply duct are turned. The air supply / exhaust duct is communicated with the exhaust duct and the one air supply / exhaust duct is communicated. When the fan is rotated in this state, the heated gas or the cooled gas flows in the route of the air supply duct → the switching damper → the other air supply / exhaust duct → the processing chamber → the material to be processed → the one air supply / exhaust duct → the switching damper → the exhaust duct. Circulate.

Therefore, according to the present invention, since heating gas or cooling gas is passed through the processing chamber from two reversible directions,
The material to be processed contained in the processing chamber can be uniformly heated or cooled. Moreover, since this is realized by rotating one fan at a constant speed and switching operation of one switching damper, the device can be simplified and downsized, which is economical.

In the present invention, when the upstream side of the air supply duct and the downstream side of the exhaust duct are connected via a heater or a cooler, the heated gas or the cooled gas can be circulated and reused. Further, as a switching damper, a plurality of guide plates are arranged side by side at a predetermined interval between two support plates. Of these, the central guide plate is flat, and the upper half of the guide plates are both side parts thereof. The upper half of the guide plate is curved, and the lower half of the guide plate is curved on both sides thereof so that both edges of these guide plates are located on the same cylindrical side circumferential surface as a whole. When the formed material is used, the heating gas or the cooling gas is primarily rectified by these guide plates, so that the material to be processed can be heated or cooled more uniformly.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view (partially sectional view) schematically showing an embodiment of the present invention, FIG. 2 is a front view schematically showing a switching damper used in the present invention, and FIG. It is a -B line sectional view. Air supply / exhaust ducts 31 and 32 are connected to both sides of the processing chamber 11 in which the material to be processed A is housed via porous straightening plates 21 and 22, and the air supply / exhaust ducts 31 and 32 are in a relationship orthogonal to these. The air supply duct 41 and the exhaust duct 42 are connected.

Air supply / exhaust ducts 31, 32 and air supply duct 41
Further, a switching damper 51 is attached to a portion orthogonal to the exhaust duct 42, and a fan 61 is provided in the air supply duct 41 so that the upstream side of the air supply duct 41 and the downstream side of the exhaust duct 42 are connected to each other. It is connected via a cooler 71.

The switching damper 51 is constructed as follows. That is, a plurality of guide plates 91 to 97 are juxtaposed at predetermined intervals between the two support plates 81 and 82 each having an arcuate surface protruding outward, and of these, the central guide plate 91 is the guide plate 91.
Is flat, the upper half guide plates 92 to 94 are curved upward on both sides, and the lower half guide plates 95 to 9 are curved.
7, both side portions thereof are curved downward, and both edges of the guide plates 91 to 97 connect the circumferential ends of the support plate 81 and the support plate 82 to the same cylindrical side. It is formed so as to be located on the peripheral surface.

In FIG. 1, the switching damper 51 is swung to join both edges of the guide plate 91 to the connection portion between the air supply duct 41 and the air supply / exhaust duct 32 and the connection portion between the exhaust duct 42 and the air supply / exhaust duct 31. In this state, the cooling gas is circulated as indicated by the solid arrow.

[0014]

As is apparent from the above, according to the present invention described above, the material to be treated can be uniformly heated or cooled, and the apparatus can be simplified and downsized to be economical. effective.

[Brief description of drawings]

FIG. 1 is a plan view (partially sectional view) schematically showing an embodiment of the present invention.

FIG. 2 is a front view schematically showing a switching damper used in the present invention.

3 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

11 ... Processing chamber, 31, 32 ... Supply / exhaust duct, 4
1 ... Air supply duct, 42 ... Exhaust duct, 51 ...
・ Switching damper, 61 ... Fan, 71 ... Cooler,
81, 82 ... Support plate, 91-97 ... Guide plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location F25D 17/08 301 8511-3L F27D 9/00 8825-4K G01N 25/00 K 8310-2J

Claims (3)

[Claims] 1. An air supply duct and an exhaust duct are connected to a processing chamber, in which a material to be processed is accommodated, through an air supply / exhaust duct in a relationship orthogonal to the air supply / exhaust duct, the air supply duct and the exhaust duct. The heat treatment apparatus is characterized in that a fan is provided in either one of the two, and a switching damper is attached to the air supply / exhaust duct and a portion orthogonal to the air supply / exhaust duct. 2. The heat treatment apparatus according to claim 1, wherein the upstream side of the air supply duct and the downstream side of the exhaust duct are connected via a heater or a cooler. 3. A switching damper, wherein a plurality of guide plates are arranged side by side at a predetermined interval between two support plates, of which the center guide plate is flat and the upper half guide plate is the same. Both sides of the guide plate are curved upward, and the lower half of the guide plates are curved downward at both sides, and both edges of these guide plates are on the same cylindrical side circumferential surface as a whole. The heat treatment apparatus according to claim 1, wherein the heat treatment apparatus is formed so as to be positioned.