Title:
LONGITUDINAL DRAWING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/079213
Kind Code:
A1
Abstract:
Provided is a longitudinal drawing device capable of reducing the occurrence of transfer damage, scratches, or the like on a thermoplastic film when drawn longitudinally. Specifically, a longitudinal drawing device 5 draws a thermoplastic film F, heated by heating rolls 13, by means of a difference in peripheral speed between a plurality of low-speed driving rolls 8 and a plurality of high-speed driving rolls 9. The plurality of low-speed driving rolls 8 and the plurality of high-speed driving rolls 9 are respectively composed of suction rolls having low-speed-side suction holes 8b and high-speed-side suction holes 9b which are a plurality of suction holes in conveyance surfaces thereof for conveying the thermoplastic film F. A plurality of the heating rolls 13 are provided between adjacent low-speed driving rolls 8 and high-speed driving rolls 9. Each of the plurality of heating rolls 13 is provided with a following electric motor 15 serving as an actuator. Each of the plurality of heating rolls 13 is configured to be independently rotationally drivable. The output torque of each of the following electric motors 15 is controlled so as to coincide with a target value set for each of the following electric motors 15.
Inventors:
KANESHIMA NARIMITSU (JP)
AOKI OSAMU (JP)
AOKI OSAMU (JP)
Application Number:
PCT/JP2017/036207
Publication Date:
May 03, 2018
Filing Date:
October 05, 2017
Export Citation:
Assignee:
TORAY ENG CO LTD (JP)
International Classes:
B65H20/12; B29C55/06; B65H23/192
Foreign References:
| JP2016044295A | 2016-04-04 | |||
| JP2013082149A | 2013-05-09 | |||
| JP2008524011A | 2008-07-10 | |||
| JP2008213332A | 2008-09-18 | |||
| JP2002254509A | 2002-09-11 | |||
| JPS63310439A | 1988-12-19 |
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