Title:
CARDBOARD SHEET MANUFACTURING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/049387
Kind Code:
A1
Abstract:
A control unit 65 of a cardboard sheet manufacturing apparatus 10 can execute a steady operation in which a corrugated roll 17A is rotated at a first set velocity V1, then execute a deceleration operation in which the corrugated roll 17A is decelerated to a second set velocity V2, and thereafter execute an acceleration operation in which the corrugated roll 17A is accelerated to a third set velocity V3. In the steady operation, the control unit 65 places an open/close valve 60A in a closed state, and supplies steam to a hollow part 17b at a first set pressure P1 using a pressure adjusting valve 55. In the deceleration operation, the control unit 65 maintains the states of the open/close valve 60A and the pressure adjusting valve 55. In the acceleration operation, the control unit 65 switches the open/close valve 60A from the closed state to an open state, and adjusts the pressure adjusting valve 55 such that steam is supplied to the hollow part 17b at a second set pressure P2.
Inventors:
YANO TAKUJI (JP)
TAHARA HIROSHI (JP)
TAHARA HIROSHI (JP)
Application Number:
PCT/JP2020/033242
Publication Date:
March 18, 2021
Filing Date:
September 02, 2020
Export Citation:
Assignee:
RENGO CO LTD (JP)
International Classes:
B31F1/36
Foreign References:
| JP2007112024A | 2007-05-10 | |||
| JP2002096411A | 2002-04-02 | |||
| US5671549A | 1997-09-30 | |||
| JP5199586B2 | 2013-05-15 | |||
| JP4558566B2 | 2010-10-06 |
Other References:
See also references of EP 4029681A4
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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