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Intermittent heat treatment furnace

A heat treatment furnace, batch technology, applied in the field of batch heat treatment furnace, can solve problems such as uneven atmosphere

Pending Publication Date: 2021-12-07
NGK INSULATORS LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, in the batch heat treatment furnace of Patent Document 1, there is a problem that the atmosphere in the furnace tends to become uneven.

Method used

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  • Intermittent heat treatment furnace
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  • Intermittent heat treatment furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (Example 1) Hereinafter, the batch type heat treatment furnace 10 which concerns on Example 1 is demonstrated. Such as figure 1 , 2 As shown, the batch heat treatment furnace 10 has: a hearth 20; a furnace body 12 covering the top of the hearth 20; In the furnace space S formed between the bodies 12.

[0038] The hearth 20 is made of a refractory, and includes a main hearth 22 , four sub-hearths 24 installed on the main hearth 22 , and a fixed bed 26 arranged around the main hearth 22 . The main hearth 22 has a disk-shaped outer shape, and is disposed such that its central axis (ie, a line extending vertically passing through the center of the main hearth 22 ) coincides with the axis of the furnace body 12 . The main hearth 22 is connected to a driving device (not shown), and is rotatable around its central axis (the axis of the furnace body 12 ).

[0039] The sub-hearth 24 has a disc shape and is provided rotatably with respect to the main hearth 22 . In this embo...

Embodiment 2

[0058] (Example 2) Next, a batch type heat treatment furnace 110 according to Example 2 will be described. The difference between the batch heat treatment furnace 110 and the first embodiment is that the gas introduction pipe 140 is embedded in the side wall 114 of the furnace body 112 , and has substantially the same configuration as the batch heat treatment furnace 10 of the first embodiment in other respects. Hereinafter, differences from Embodiment 1 will be mainly described.

[0059] Such as Figure 9 ~ Figure 11 As shown, the batch heat treatment furnace 110 is similar to the first embodiment, and includes a hearth 120 , a furnace body 112 , a plurality of heaters 130 , and a plurality of gas introduction pipes 140 . The hearth 120 has the same configuration as the hearth 20 of the first embodiment, and the heater 130 also has the same configuration as the heater 30 of the first embodiment. In the batch heat treatment furnace 110, the furnace body 112 and the gas intro...

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Abstract

The invention provides an intermittent heat treatment furnace, which can inhibit the non-uniformity of the atmosphere in the furnace. The intermittent heat treatment furnace (10) is provided with a furnace body (12) provided with a top wall and side walls (14); a hearth (20) having an upper surface on which an object to be processed is placed; a plurality of heaters (30) which are arranged inside the furnace body, are arranged between the side wall and the object to be processed, and are arranged along the side wall at intervals in the circumferential direction; and a plurality of gas outlets for supplying atmospheric gas into the furnace body. The shape of the inside of the furnace formed by the furnace body and the hearth has a cylindrical shape. The plurality of gas outlets are located between the heaters and the side wall in the radial direction in the cylindrical furnace, and are located between circumferentially adjacent heaters in the circumferential direction in the cylindrical furnace. The direction in which the gas is blown out from the plurality of gas outlets is the inside of the furnace.

Description

technical field [0001] The technology disclosed in this specification relates to a batch-type heat treatment furnace for heat-treating an object to be processed (for example, laminated ceramic components such as ceramic capacitors, ceramic piezoelectric elements, and ceramic resistors, etc.). Background technique [0002] In order to stabilize the properties of the object after heat treatment, it is necessary to make the furnace temperature and furnace atmosphere uniform during the heat treatment. In the batch-type heat treatment furnace of Patent Document 1, a plurality of heaters are arranged at intervals in the circumferential direction, and gas outlets are arranged at positions corresponding to the respective heaters. The gas outlet is arranged between the heater and the inner wall surface of the furnace, and the atmospheric gas from the gas outlet is supplied into the furnace while being heated by the heater. Thereby, uniformization of the temperature in the furnace an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B3/06F27B3/20F27B3/22F27B3/12
CPCF27B3/06F27B3/20F27B3/22F27B3/12F27B2003/125F27M2001/035
Inventor 山口实丹羽浩平有马和彦中村纪久
Owner NGK INSULATORS LTD