Unlock instant, AI-driven research and patent intelligence for your innovation.

Centrifugal casting method and apparatus

A technology of centrifugal casting and molten metal, which is applied in the field of centrifugal casting of metal objects and centrifugal casting of iron pipes, and can solve problems such as lack of uniformity of wall thickness

Active Publication Date: 2015-12-02
美国管业铸造有限公司
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this can result in tubes that lack uniformity in wall thickness, and wide tolerances to specification need to be accepted
Therefore it is very challenging to cast thin walled pipes using current technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Centrifugal casting method and apparatus
  • Centrifugal casting method and apparatus
  • Centrifugal casting method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 100

[0035] Embodiment 100 also includes instrumentation for measuring the liquidus critical temperature and pouring temperature of molten iron. Since the chemical composition of the molten metal can vary from heat to heat, it is not possible to directly calculate the liquidus critical temperature. As is known in the art, as a molten metal cools, the liquidus critical temperature (and information about its chemical composition) can be determined from its temperature profile over time (i.e. its cooling curve) . This determination is typically made using commercially available disposable cups (including thermocouples) for thermal analysis of molten metals. The molten metal is poured into the cup and the output of the thermocouple is analyzed to determine the characteristics of the molten metal. In a preferred embodiment, a QuiK-CupQC4010 manufactured by Heraeus Electro-Nite is used to determine the liquidus critical temperature of molten iron. like figure 2 In the preferred embo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method and apparatus for centrifugal casting, in which transfer functions are developed relating the fluidity of molten metal, for example iron of varying composition, to casting machine movement for a particular mold in order to cast objects, for example pipe, having desired and uniform characteristics, including wall thickness. Fluidity is calculated for each pour of molten metal based on the measured pour temperature and measured liquidus arrest temperature. A drive system controlled by a programmable logic controller moves the casting machine in accordance with the output of the transfer functions based on the calculated fluidity.

Description

technical field [0001] The present invention relates generally to the field of centrifugal casting of metal objects, and more particularly, to the field of centrifugal casting of iron pipes. Background technique [0002] The process of centrifugal casting of metal objects, especially iron pipes, is well known and has been practiced for almost a century. A centrifugal casting machine consists of a conveyor system (such as a tank) and a rotating mold. Molten iron is poured from a machine ladle into a trough. The slots generally extend axially into the interior of the rotating mold. One end of the mold usually includes a core, such as a sand core, to precisely shape the so-called bell of the pipe. The other end of the tube is called the sleeve, and the elongated part between the two ends is the barrel. The molten iron flows down the trough under the influence of gravity. The mold and tank are moved relative to each other to fill the mold with the iron generally from the be...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22D13/12B22D13/02B22D13/10
CPCB22D13/12B22D13/023B22D13/107
Inventor 肯尼斯·J·沃茨特里·M·伍德
Owner 美国管业铸造有限公司