JPS5556463A - Controlling device for starting molten metal pouring in electromagnetic pump automatic pouring apparatus - Google Patents
Controlling device for starting molten metal pouring in electromagnetic pump automatic pouring apparatusInfo
- Publication number
- JPS5556463A JPS5556463A JP12915278A JP12915278A JPS5556463A JP S5556463 A JPS5556463 A JP S5556463A JP 12915278 A JP12915278 A JP 12915278A JP 12915278 A JP12915278 A JP 12915278A JP S5556463 A JPS5556463 A JP S5556463A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic pump
- voltage
- molten metal
- circuit
- function generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
PURPOSE: To protect molten metal from scattering and casting molds from being damaged by gradually increasing supply voltage for an electromagnetic pump in changing the condition from nonpouring to pouring condition by means of a soft start circuit being fitted in the control signal circuit.
CONSTITUTION: The supply voltage for an electromagnetic pump 3 is controlled by a static reversible voltage regulator 5 through a load cell 4, a nonreturn voltage controlling function generator 9, a flow rate setting function generator 7, an absolute value circuit 12, a positive/negative phase decision circuit 13. At the step following the change-over switch 8 of this function generator is equipped a soft start circuit 10 which makes the output voltage change gradually in spite of sudden change of the input voltage. In this way, either when the switch 8 is connected with a contact 8a and the electromagnetic pump 3 produces reverse thrust or when the switch is changed over to a contact 8b and normal thrust is produced, the voltage changes gradually and the molten metal 2 can be protected from sudden flush.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12915278A JPS5556463A (en) | 1978-10-19 | 1978-10-19 | Controlling device for starting molten metal pouring in electromagnetic pump automatic pouring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12915278A JPS5556463A (en) | 1978-10-19 | 1978-10-19 | Controlling device for starting molten metal pouring in electromagnetic pump automatic pouring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5556463A true JPS5556463A (en) | 1980-04-25 |
Family
ID=15002416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12915278A Pending JPS5556463A (en) | 1978-10-19 | 1978-10-19 | Controlling device for starting molten metal pouring in electromagnetic pump automatic pouring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5556463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05240186A (en) * | 1992-02-28 | 1993-09-17 | Hitachi Ltd | Liquid feed device for city water |
-
1978
- 1978-10-19 JP JP12915278A patent/JPS5556463A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05240186A (en) * | 1992-02-28 | 1993-09-17 | Hitachi Ltd | Liquid feed device for city water |
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