Title:
MELT SOLIDIFICATION COMPLETION DETECTION METHOD AND MELT SOLIDIFICATION COMPLETION DETECTION DEVICE FOR CASTING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/033790
Kind Code:
A1
Abstract:
In the present invention, an eddy current sensor (1) is disposed in a position such that an electromagnetic field that is generated reaches a melt that is filled into a cavity (11). After pouring the melt into the cavity (11) is started, a voltage signal output by the eddy current sensor (1) changes to increase and an output signal of a differentiating circuit (28) within a detection device (21) exceeds a threshold value (Vx) (first step), and if the output signal of the differentiating circuit (28) exceeds a threshold value (Vy) (< Vx) (second step), a controller (27) stores the sensor output value at the time as a reference voltage value (V3) (= Voffset + Vα). Furthermore, if it is detected that the sensor detection value increases by a determination value (ΔVb) from the reference voltage value (V3), solidification of the melt is determined to be completed (third step).
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Inventors:
TAKATSUKA TOMOSHI (JP)
Application Number:
PCT/JP2014/071880
Publication Date:
March 12, 2015
Filing Date:
August 21, 2014
Export Citation:
Assignee:
SG CORP (JP)
International Classes:
B22D17/32; B22C9/00
Foreign References:
| JP2006142360A | 2006-06-08 | |||
| JP2007083275A | 2007-04-05 | |||
| JPH09271926A | 1997-10-21 |
Other References:
J.P .WALLANCE ET AL.: "An Eddy-Current Study of Casting", ASTM SPEC TECH PUBL, NO.722, 1981, pages 173 - 186
Attorney, Agent or Firm:
SATO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Satow international patent firm (JP)
Patent business corporation Satow international patent firm (JP)
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