JP2003314964A - Atmosphere baking furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable atmosphere baking furnace provided with gas displacement chambers at an inlet and an outlet of a baking furnace body, enabling smooth operation of a door causing no abnormal noise nor failure of the operation of the door when opening the door of the gas displacement chamber. <P>SOLUTION: In the atmosphere baking furnace provided with the gas displacement chambers at the inlet and outlet of the baking furnace, in order to have a highly reliable door opening and closing structure enabling the smooth operation of the door causing no abnormal noise nor failure of the operation of the door when opening the door of the gas displacement chamber, pipes are arranged between an inside of the baking furnace body and the gas displacement chamber, and a valve is provided. Before opening an intermediate door, the valve is opened to have the pressure in the baking furnace body the same as that in the gas displacement chamber. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atmosphere firing furnace having a gas replacement chamber at an inlet and an outlet of a firing furnace body. When a reducing gas, an inert gas or an oxidizing gas is introduced into a continuous pusher type firing furnace or a batch type firing furnace to form an atmosphere, replacement chambers are provided at an inlet and an outlet of a firing furnace body. In some cases, a door for maintaining airtightness is provided to shut off the outside air. In a continuous pusher type firing furnace,
For example, paying attention to the outlet of the firing furnace, when the base plate arrives in front of the gas replacement chamber, an intermediate door between the firing furnace main body and the replacement chamber is opened, and the base plate is sent into the replacement chamber. Generally, in order to maintain the atmosphere in the furnace, a pressure difference occurs between the inside of the firing furnace main body and the gas replacement chamber. Due to this pressure difference, stress is applied to one side of the intermediate door, and there is a problem that it is difficult to open. Attempting to open it forcibly causes abnormal noise, malfunctions of the door, etc., resulting in a device with low reliability. In order to solve this problem, measures have been taken such as arranging a roller on a door or a guide rail of the door, but maintenance is extremely difficult due to a complicated structure. SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems and to provide an atmosphere firing furnace having a gas replacement chamber at an inlet and an outlet of a firing furnace. Provided is a highly reliable atmosphere firing furnace that can be operated smoothly without generating abnormal noise or malfunction when opening a door installed between main bodies. [0004] That is, an atmosphere firing furnace according to the present invention is an atmosphere firing furnace having a gas replacement chamber at an inlet and an outlet of a firing furnace main body. A valve is provided to make the pressure the same, facilitating opening and closing of the door. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Although there is no limitation to an embodiment of the present invention, a continuous pusher type sintering furnace will be described with reference to the drawings. FIG. 1 is a plan view of an exit replacement chamber and a door embodying the present invention. In an atmosphere firing furnace having a gas replacement chamber 2 at an inlet and an outlet of a firing furnace main body, a firing furnace main body 1 is provided.
To shut off the atmosphere in the gas replacement chamber 2
However, an exit door 4 is provided to shut off the outside air.
In the continuous pusher type firing furnace, the transported base plate 7
Reaches the front of the replacement chamber pushing pusher 6, the intermediate door 3 is opened and the base plate 7 is pushed into the gas replacement chamber 2. At this time, a pressure difference is generated between the inside of the firing furnace main body and the gas replacement chamber 2, so that the intermediate door 3 is hard to open. Therefore, according to the present invention, the pressure equalizing valve 5 provided between the firing furnace 1 and the gas replacement chamber 2 is opened to make the inside of the furnace and the gas replacement chamber 2 have the same pressure. As a result, the intermediate door 3 operates smoothly without any abnormal noise or a malfunction of the door operation. As described above, according to the present invention, in an atmosphere firing furnace having a gas replacement chamber at the inlet and the outlet of the continuous pusher type firing furnace main body, when the door of the gas replacement chamber is opened, an abnormal sound is generated. It is possible to provide a device that operates smoothly and has a small number of maintenance times without any trouble in door operation. This device is used for electronic components such as capacitors and piezoelectric elements,
It is useful for firing phosphor powder and the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an outlet replacement chamber and a door in a continuous pusher type firing furnace of the present invention. [Explanation of Codes] Firing furnace body2. Gas replacement chamber3. Intermediate door 4. Exit door5. Equalizing valve 6. 6. Pusher for pushing the replacement chamber Bed plate

Claims (1)

Claims: 1. An atmosphere firing furnace having gas replacement chambers at an inlet and an outlet of a firing furnace main body, wherein an airtight maintenance door provided between the firing furnace main body and the gas replacement chamber is provided. An atmosphere baking furnace characterized by providing a valve to make the inside of the baking furnace main body and the gas replacement chamber have the same pressure when opened, to facilitate opening and closing of a door.