JP4438154B2 - Heat treatment unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat treatment product transfer unit that becomes a container for carrying and transferring a processed product in a continuous furnace such as a roller hearth furnace.
[0002]
[Prior art]
In the case of continuous heat treatment of processed products such as metal powder and metal parts, the processed product is conventionally placed in an appropriately sized container and placed on a tray for roller hearths, mesh belts, and other transport methods. It was common to charge in a continuous furnace.
[0003]
In addition, processed products that are easily oxidized, such as rare metal, are processed in a vacuum or high-purity non-oxidizing atmosphere gas, but a very small amount of oxidation is inevitable. Therefore, conventionally, the container is covered with a lid to block the ventilation of the container, and further, a substance that easily oxidizes (Mg, Ca, etc.) is put in the container in advance to prevent oxidation of the processed product. Yes.
[0004]
[Problems to be solved by the invention]
However, there is a problem that when the container is continuously used and heating and cooling are repeated, deformation occurs and the airtightness with the lid is easily lost. In particular, a large container used for mass processing has a large amount of deformation, so that the gap between the lid and the lid tends to be large.
[0005]
The present invention solves such problems, prevents harmful effects associated with thermal expansion and contraction, and does not impair usability.
[0006]
[Means for Solving the Problems]
Therefore, the heat-treated product carrying unit according to the present invention is characterized in that a plurality of independent containers with lids are fixed on a single tray.
Further, the present invention is characterized in that, in the heat-treated product carrying unit, the lid of each container is suspended and supported by one frame.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of the heat-treated product carrying unit with the lid open, and FIG. 2 is a longitudinal sectional view when the lid is closed. In the figure, 1, 1,... Are in-furnace transport rollers provided at regular intervals, and 2 is a cast frame-shaped tray slidably disposed on the rollers. Containers 3 a to 3 d are fixed by bolts 4. Each container is fixed on the tray so that there is a slight gap between adjacent containers.
[0008]
Further, 5 is provided with a ring 7 at the four corners, and a frame is supported by hanging the lids 6a to 6d covering the upper end openings of the containers 3a to 3d, and 8 is provided at the center of the frame. It is a hook.
[0009]
The heat treatment product transfer unit configured in this manner is filled with the treatment product 9 in each of the containers 3a to 3d and covered with the lids 6a to 6d, and is carried into and transferred to a continuous furnace such as a roller hearth furnace. It is subjected to heat treatment by heating and cooling at a predetermined temperature. Therefore, in this transport unit, the four subdivided containers 3a to 3d are fixed on one tray 2, and the size of each container is reduced, so that the amount of thermal expansion and contraction of each container is small. Therefore, even if there is repeated thermal expansion and contraction, the amount of deformation can be reduced compared to a large container. Further, the lids 6a to 6d can be made small, and the deformation amount can be kept small. For this reason, it is hard to produce the clearance gap between a container and a lid | cover resulting from a deformation | transformation, and airtightness can be maintained over a long term.
[0010]
In this embodiment, since the lids 6a to 6d are suspended and supported by the frame body 5, a robot arm or the like is engaged with the hook 8, and the frame body 5 is automatically moved onto the containers 3a to 3d. Thus, the four lids can be opened and closed simultaneously, so that the workability of the heat treatment is not impaired even if the container is subdivided.
[0011]
In this embodiment, the containers 3a to 3d are fixed on the tray 2 with bolts 4. However, the containers 3a to 3d may be fixed to the tray 2 by welding or formed integrally with the tray by casting or the like. May be. It goes without saying that the number of containers to be partitioned is not limited to this embodiment.
[0012]
【The invention's effect】
As described above, the unit for transporting a heat-treated product according to the present invention is formed by fixing a plurality of independent containers with lids on a single tray, so that the amount of deformation accompanying thermal expansion and contraction of each container can be kept small. Even when used repeatedly, the airtightness is maintained and the durability is improved.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing a state where a cover of a heat-treated product carrying unit according to an embodiment of the present invention is opened.
2 is a longitudinal sectional view showing a state in which a lid of the heat-treated product carrying unit of FIG. 1 is closed. FIG.
[Explanation of symbols]
2 Tray 3a-3d Container 5 Frame 6a-6d Lid

Claims (2)

A unit for transporting a heat-treated product, wherein a plurality of independent containers with lids are fixed on one tray. The heat-treated product carrying unit according to claim 1, wherein the lid of each container is suspended and supported by one frame.

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