Rear slagging for induction furnace

Claim 2

A back-tilting induction melting furnace assembly having a center of gravity comprising an induction furnace unit normally disposed on a vertical axis for melting, said furnace unit having a forwardly directed pouring spout and a rearwardly directed slag spout; an upright unitary rigid fraMe having a front portion and a rearwardly extending portion; means pivotally mounting said furnace unit to said frame for pivoting about an axis disposed adjacent to the upper end of and at the front portion of said frame and forwardly of the center of gravity of said furnace unit and frame and adjacent to said pouring spout whereby said furnace unit is pivotable upwardly and forwardly with respect to said frame to pour melt therefrom; and means pivotally mounting the lower end of said frame on a fixed base means rearwardly of the center of gravity of said furnace unit and frame for tilting said frame and said furnace unit rearwardly and upwardly for slagging whereby the center of gravity of said frame and furnace unit is between said two pivotal mounting means.

Claim 3

A back-tilting induction melting furnace assembly as set forth in claim 1: said means pivotally mounting said furnace unit comprising a cradle mounted adjacent to the upper end of said furnace unit; said cradle pivoted at its forward end to the upper end of said frame adjacent to the front portion of said frame on an axis transverse to the direction of pouring.

Claim 4

A back-tilting induction melting furnace assembly as set forth in claim 2: power means acting between said frame and said cradle for pivoting said cradle and said furnace unit forwardly for pouring; and power means acting between said frame and said fixed base means for tilting said frame, cradle, and furnace unit rearwardly for slagging.

Claim 5

A back-tilting induction melting furnace assembly as set forth in claim 2: said cradle having side members disposed at the sides of said furnace unit adjacent to the upper end thereof; said frame having horizontal members at the bottom side edges thereof; cylinders disposed on either side of said furnace unit and connected between said side members and said horizontal members substantially rearwardly of the vertical plane of said transverse axis for pivoting said cradle and furnace unit forwardly for pouring; the rearwardly directed ends of said horizontal members being pivoted on said fixed base means to provide the lower pivot for said frame; and cylinder means connected between the front of said frame and said fixed base means for tilting said frame, cradle, and furnace unit rearwardly for slagging.

Claim 6

A back-tilting induction melting furnace assembly as set forth in claim 1: power means for pivoting said furnace unit forwardly and upwardly about the axis of said first mentioned pivotal mounting means; and power means for tilting said frame and furnace unit upwardly and rearwardly about the axis of said second mentioned pivotal mounting means.

Claim 7

A back-tilting induction melting furnace assembly having a center of gravity comprising an induction furnace unit normally disposed on a vertical axis for melting, said furnace unit having a forwardly directed pouring spout and an opposite, rearwardly directed slag spout disposed generally at the level of a normal operating deck; an upright unitary rigid frame having a front portion and a rearwardly extending portion; means pivotally mounting said furnace unit to said frame for pivoting about an axis disposed adjacent to the upper end of and at the front portion of said frame forwardly of the center of gravity of said furnace unit and frame and adjacent to said pouring spout whereby said furnace unit is pivotable upwardly and forwardly with respect to said frame to pour melt therefrom above the level of the operating deck; and means pivotally mounting the lower end of said frame on a fixed base means rearwardly of the center of gravity of said furnace unit for tilting said frame and furnace unit rearwardly and upwardly in the opposite direction for slagging above the level of the operating deck, the center of gravity of said furnace being between said two pivotal mounting means whereby said furnace normally tends to return to an upright position.

Claim 8

A back-tilting induction melting furnace assembly having a center of gravity comprising an induction furnace unit normally disposed on a vertical axis for melting, said furnace unit having a forwardly directed pouring spout and an opposite, rearwardly directed slag spout disposed generally at the level of a normal operating deck; an upright unitary rigid frame having a front portion and a rearwardly extending portion; means pivotally mounting said furnace unit to said frame for pivoting about an axis disposed adjacent to the upper end of and at the front portion of said frame forwardly of the center of gravity of said furnace unit and frame and adjacent to said pouring spout whereby said furnace unit is pivotable upwardly and forwardly with respect to said frame to pour melt therefrom above the level of the operating deck; and means pivotally mounting the lower end of said frame on a fixed base means rearwardly of the center of gravity of said furnace unit for tilting said frame and furnace unit rearwardly and upwardly in the opposite direction for slagging above the level of the operating deck, the center of gravity of said furnace being between said two pivotal mounting means whereby said furnace normally tends to return to an upright position.