JPH0554987U - High temperature atmosphere furnace - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a high-temperature atmosphere furnace capable of firing an article to be fired in an arbitrary atmosphere and excellent in response to temperature change. [Structure] A trolley 2 having a vertical wall 8 capable of sealing its opening is arranged inside a fiber-lined furnace body 1. A refractory airtight box 9 in which the material W to be fired is stored is mounted on the trolley 2, and an atmosphere gas is supplied to the inside of the airtight box 9 through a communication pipe 10 penetrating the vertical wall 8.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a high temperature atmosphere furnace for firing an object to be fired in a high temperature atmosphere.

[0002]

[Prior Art]

 Conventionally, an electric furnace having a structure in which an electric heater is arranged inside a refractory furnace body has been used as a high temperature atmosphere furnace. However, since such an electric furnace has a poor response to temperature changes, it is not possible to increase the rate of temperature increase or decrease, and it is impossible to give a rapid temperature gradient such as 1000 ° C / Hr. It was However, recently, in order to guarantee the electrical and temporal characteristics of products, it is sometimes required to perform firing while applying a wide temperature gradient from 5 ° C / Hr to 1000 ° C / Hr. This electric furnace could not meet this requirement.

[0003]

[Problems to be solved by the device]

 The present invention has been completed in order to solve the above-mentioned conventional problems and provide a high-temperature atmosphere furnace which can fire a product to be fired in an arbitrary atmosphere and is excellent in response to a temperature change.

[0004]

[Means for Solving the Problems]

 The present invention, which has been made to solve the above problems, inserts a trolley having a vertical wall capable of sealing an opening of a furnace into a gas-fired furnace body in which a ceramic fiber is lined, and It is arranged so that it can be pulled out freely, and a refractory airtight box that houses the material to be fired is mounted on the trolley, and a communication pipe for supplying atmospheric gas to the inside of this airtight box penetrates the vertical wall. It is characterized by being provided separately.

[0005]

Embodiments The present invention will be described in more detail below with reference to illustrated embodiments. In FIGS. 1 and 2, reference numeral 1 is a gate-shaped furnace body, and 2 is a trolley arranged along the bottom rail 3 of the furnace body 1 so that it can be inserted into and pulled out of the furnace body 1. The furnace body 1 of the embodiment is a fiber-lined furnace in which a ceramic ceramic fiber 4 having excellent heat resistance is lined thickly on the ceiling and side walls. The furnace body 1 is an upper exhaust type furnace having an exhaust hole 6 with a damper 5 on the ceiling, and is a gas combustion type furnace heated by a gas burner 7. The gas burner 7 uses, for example, LPG or LNG as a fuel, and can change the combustion temperature in a much shorter time than an electric heater. Also, since the fiber-lined furnace is used, it is possible to reduce the amount of heat stored in the furnace body and improve the response to temperature changes.

The trolley 2 has an L-shaped cross section and includes a vertical wall 8 integrated with the floor surface of the trolley 2. The vertical wall 8 is for sealing the opening of the furnace body 1 when the carriage 2 is inserted into the furnace body 1 as shown in the figure. Both the floor surface and the vertical wall 8 of the trolley 2 are thickly lined with alumina ceramic fibers 4 like the furnace body 1.

A refractory airtight box 9 in which the material W to be fired is stored is mounted on the trolley 2. A plurality of communication pipes 10 extending through the vertical wall 8 reach the airtight box 9 so that an atmospheric gas such as O ₂ or N ₂ can be supplied into the airtight box 9. There is.

[0008]

[Action]

 In order to perform firing in the high temperature atmosphere furnace of the present invention configured as described above, first, the article W to be fired is stored in the airtight box 9 made of refractory on the truck 2, and the truck 2 is placed inside the furnace body 1. And the vertical wall 8 of the carriage 2 seals the opening of the furnace body 1. In this state, the inside of the furnace body 1 is heated by the gas burner 7, and the atmospheric gas is supplied to the inside of the airtight box 9 through the plurality of communication pipes 10 extending through the vertical wall 8. As a result, the object W to be fired is muffle-heated at, for example, 1500 ° C. through the airtight box 9.

As described above, in the high temperature atmosphere furnace of the present invention, the atmosphere gas can be freely supplied to the inside of the airtight box 9 through the communication pipe 10, so that high temperature firing can be performed in any atmosphere. Further, the high temperature atmosphere furnace of the present invention has a thick ceramic fiber 4 lined in the furnace body 1 and the carriage 2 and has a very small heat storage amount, and a gas burner 7 capable of changing the combustion temperature instantaneously. Since it is used, the response of the furnace temperature change is extremely good. In particular, when the upper exhaust furnace is used as in the embodiment, it is possible to perform firing while giving a wide temperature gradient from 5 ° C / Hr to 1000 ° C / Hr, which is suitable for firing electronic parts and the like. It is a thing.

[0010]

[Effect of the device]

 As described above, according to the present invention, the product to be fired can be fired at a high temperature in an arbitrary atmosphere, and the response of the temperature change is extremely good. As a furnace, its practical value is extremely large.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment of the present invention in a direction perpendicular to FIG.

[Explanation of symbols]

 1 Furnace 2 Bogie 4 Ceramic Fiber 8 Vertical Wall 9 Refractory Airtight Box 10 Communication Tube W Fired Material

Claims (1)

[Scope of utility model registration request] 1. A trolley provided with a vertical wall capable of sealing an opening of a furnace body is inserted and pulled out inside a gas-fired furnace body lined with ceramic fibers, and a product to be fired is A refractory airtight box to be housed is mounted on a trolley, and a communication pipe for supplying atmospheric gas to the inside of the airtight box is provided through the vertical wall to provide a high temperature atmosphere. Furnace.