System for producing steel castings

Patent metadata

Field	Value
Publication number	US-10875089-B2
Application number	US-201916452656-A
Country	US
Kind code	B2
Filing date	Jun 26, 2019
Priority date	Jul 6, 2018
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

To provide a system for producing steel castings that is simple and suitable to continuously produce many small steel castings. A system 1 comprises multiple furnaces 10 that are aligned and hold molten metal for cast steel, a pouring machine 20 that has a ladle 30 that receives the molten metal from the furnaces, wherein the pouring machine travels in parallel to a line of the furnaces and pours the molten metal into a mold 70 by tilting the ladle, a line 60 for conveying the molds that intermittently conveys molds that are aligned in parallel to a direction in which the pouring machine travels, wherein the line is located on the opposite side of the furnaces across the pouring machine, and a temperature sensor 38 that measures a temperature of the molten metal so as to generate an alarm if the temperature is low.

First claim

The invention claimed is:

1. A system for producing steel castings comprising:
multiple furnaces that are aligned and hold molten metal for cast steel;
a pouring machine that has a ladle that receives the molten metal from the furnaces, wherein the pouring machine travels in parallel to a line of the multiple furnaces and pours the molten metal into a mold by tilting the ladle;
a line for conveying molds that intermittently conveys multiple molds that are aligned in parallel to a direction in which the pouring machine travels, wherein the line for conveying the molds is located on an opposite side of the furnaces and across the pouring machine: and
a temperature sensor that measures a temperature of the molten metal in the ladle so as to generate an alarm if the measured temperature is below a predetermined temperature.

2. The system for producing steel castings of claim 1 ,
wherein, when the alarm is generated, pouring molten metal is stopped and the molten metal is returned to the furnaces.

3. The system for producing steel castings of claim 1 ,
wherein the pouring machine has a device for moving the ladle that moves the ladle between a side of the furnaces and a side of the molds.

4. The system for producing steel castings of claim 3 ,
wherein the device for moving the ladle is a roller conveyor that moves the ladle from a position for receiving the molten metal from the furnaces to a position for pouring molten metal into the molds.

5. The system for producing steel castings of claim 4 ,
wherein the pouring machine has a travelling bogie that transports the pouring machine, a device for vertically moving the roller conveyor, a device for moving the roller conveyor back and forth that moves the roller conveyor toward the position for receiving the molten metal and the position for pouring molten metal, and a device for tilting the roller conveyor that tilts the roller conveyor to cause the ladle to pour the molten metal into the molds.

6. The system for producing steel castings of claim 5 ,
wherein the pouring machine has a device for putting on a cover that puts the cover on the ladle and removes the cover from the ladle.

7. The system for producing steel castings of claim 6 ,
wherein each mold is a tight flask mold that has a flask and a through-hole is formed in the flask,
the system further comprising a device for decompression that has multiple connecting ports along the line for conveying the molds, wherein the ports are connected to the through-hole of the flask of each mold, into which the molten metal is poured, so as to decompress each mold.

8. The system for producing steel castings of claim 7 further comprising:
a device for supplying antioxidant gas that fills the ladle with antioxidant gas.

9. The system for producing steel castings of claim 8 ,
wherein the ladle has a porous refractory layer between a metal shell and a refractory material.

10. The system for producing steel castings of claim 1 ,
wherein the pouring machine has a device for putting on a cover that puts the cover on the ladle and removes the cover from the ladle.

11. The system for producing steel castings of claim 1 ,
wherein each mold is a tight flask mold that has a flask and a through-hole is formed in the flask,
the system further comprising a device for decompression that has multiple connecting ports along the line for conveying the molds, wherein the ports are connected to the through-hole of the flask of each mold, into which the molten metal is poured, so as to decompress each mold.

12. The system for producing steel castings of claim 1 further comprising:
a device for supplying antioxidant gas that fills the ladle with antioxidant gas.

13. The system for producing steel castings of claim 12 ,
wherein the ladle has a porous refractory layer between a metal shell and a refractory material.

Assignees

• Sintokogio Ltd
• Fujiwa Denki Co Ltd

Inventors

• Nishida Tadashi
• Tamotsu Hiroyuki
• Hyodo Toshiyuki

Classifications

• B22D41/12 Primary

  Travelling ladles or similar containers; Cars for ladles (casting cranes B66C) · CPC title

• B22D35/04 Primary

  into moulds, e.g. base plates, runners · CPC title

• B22D47/00 Primary

  Casting plants · CPC title

• B22D41/01

  Heating means · CPC title

• B22D46/00

  Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons (controlling or regulating in general G05) · CPC title