Dosing pump trigger system

Patent metadata

Field	Value
Publication number	US-12076785-B2
Application number	US-202017619109-A
Country	US
Kind code	B2
Filing date	Jun 10, 2020
Priority date	Jun 14, 2019
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A method for delivering molten metal to a shot sleeve of a casting machine from a molten metal furnace. A molten metal pump is positioned within the furnace. The pump includes a molten metal outlet in fluid communication with the shot sleeve. A shaft and impeller or screw assembly of the pump is selectively rotated to introduce molten metal to the shot sleeve in a predetermined quantity. The predetermined quantity is determined by a controller that receives a signal from a trigger mechanism associated with the molten metal outlet.

First claim

The invention claimed is:

1. A molding machine comprising a cavity to be filled with molten metal; a conduit system leading to said cavity; a mechanical pump in fluid communication with a reservoir of molten metal and the conduit system; and at least one trigger mechanism in association with the conduit system, said trigger mechanism configured to determine when molten metal has reached a defined point in the conduit system; wherein a controller calculates a quantity of molten metal flow based upon the speed of the motor and wherein said controller calculates an associated time of molten metal pump operation necessary to fill a mold and wherein said trigger mechanism instructs said controller to initiate a countdown of said time.

2. The molding machine of claim 1 wherein said pump includes an electronic brake.

3. The molding machine of claim 1 wherein said controller receives data concerning molten metal depth in said reservoir or an associated furnace.

4. The molding machine of claim 1 wherein said trigger mechanism further calculates a volume of molten metal passing through the conduit system over a fixed period of time.

5. The molding machine of claim 1 wherein said trigger mechanism comprises a laser, a thermocouple, molten metal switch and/or a pressure sensor.

6. The molding machine of claim 1 wherein said pump comprises a centrifugal pump.

7. The molding machine of claim 1 wherein said pump comprises a screw pump.

8. The molding machine of claim 1 wherein the system is closed to the environment between the pump and the cavity.

9. The molding machine of claim 1 wherein a rotatable delivery arm is in fluid communication with a riser of the pump.

10. The molding machine of claim 9 wherein the rotatable delivery arm is supported on a track member.

11. The molding machine of claim 9 including a rotatable coupling disposed between the riser and the rotatable arm.

12. The molding machine of claim 9 including a rotatable coupling disposed between the riser and the rotatable arm.

Assignees

• Pyrotek Inc

Inventors

• Tipton Jon
• Horsfall Andrew

Classifications

• B22D39/023

  using a displacement member · CPC title

• B22D17/30

  Accessories for supplying molten metal, e.g. in rations (supplying molten metal in ration in general B22D39/00) · CPC title

• B22D39/02 Primary

  having means for controlling the amount of molten metal by volume · CPC title