Title:
BATCH-TYPE HEAT TREATMENT FURNACE
Document Type and Number:
WIPO Patent Application WO/2022/054437
Kind Code:
A1
Abstract:
The technical problem addressed by the present invention is to provide a batch-type heat treatment furnace which, when cooling variation occurs in a workpiece, can suppress the cooling variation and enable easier and more uniform workpiece cooling by changing the cooling capacity for each area and cooling only specific parts. This technical problem is solved by a batch-type heat treatment furnace that comprises, disposed inside of a casing (2), an inner chamber (3) which constitutes a heat treatment chamber, a cooling space (S), multiple ventilation flow paths (10) which allow communication between the inside of the inner chamber (3) and the cooling space (S), and lids (11) which are provided in each ventilation flow path (10), wherein each of the lids (11) can individually open and close the ventilation flow paths (10) in a manner allowing adjustment of the degree of opening thereof so as to differ the amount of air flowing from the cooling space (S) into the inner chamber (3) for each ventilation flow path (10); each of the ventilation flow paths (10) is provided with discharge holes (10a), and the discharge holes (10a) allow communication with the inner chamber (3); the multiple ventilation flow paths (10) include ventilation flow paths (10) that are arranged in a branching manner and ventilation flow paths that have different numbers and arrangements of the discharge holes (10a).
Inventors:
NAGAI NORIAKI (JP)
OOKUBO TOMOYA (JP)
USUDA JUNICHI (JP)
OOKUBO TOMOYA (JP)
USUDA JUNICHI (JP)
Application Number:
PCT/JP2021/027867
Publication Date:
March 17, 2022
Filing Date:
July 28, 2021
Export Citation:
Assignee:
CHUGAI RO KOGYO KAISHA LTD (JP)
International Classes:
F27B5/16; C21D1/74; F27B14/08; F27D9/00
Foreign References:
| JP2020085359A | 2020-06-04 | |||
| JPH01176023A | 1989-07-12 | |||
| JPS6364762U | 1988-04-28 | |||
| JPH04174289A | 1992-06-22 | |||
| JPS63255319A | 1988-10-21 | |||
| JPS62188718A | 1987-08-18 |
Attorney, Agent or Firm:
SUZUKI Satoru (JP)
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