Title:
METHOD AND DEVICE FOR CONTROLLING FLUIDITY INDEX OF MOLTEN RESIN
Document Type and Number:
WIPO Patent Application WO/2021/085256
Kind Code:
A1
Abstract:
[Problem] To provide a method for controlling a fluidity index of a molten resin, whereby not only can the fluidity of the molten resin be ascertained while continuous molding is being performed, but the fluidity can be controlled to within a desired target range. [Solution] Assuming a narrow flow channel formed in a molten resin flow channel to be a capillary or an orifice, a fluidity index representing a fluidity characteristic of the weighed molten resin is measured on the basis of the weighed resin quantity of the molten resin and a back pressure acting on a screw during a weighing step, the measured value of the fluidity index is fed back and compared with a target value, and the back pressure or the rotation speed of the screw is controlled so that there is no deviation from the target value.
Inventors:
OKUYAMA HIROSHI (JP)
Application Number:
PCT/JP2020/039491
Publication Date:
May 06, 2021
Filing Date:
October 21, 2020
Export Citation:
Assignee:
SHIBAURA MACHINE CO LTD (JP)
International Classes:
B29C45/52; B29C45/76
Foreign References:
| JPH1110694A | 1999-01-19 | |||
| JP2003262579A | 2003-09-19 | |||
| JP2008044110A | 2008-02-28 | |||
| JPH05329864A | 1993-12-14 | |||
| JPS54135857A | 1979-10-22 |
Attorney, Agent or Firm:
NAKAMURA Yukitaka et al. (JP)
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