Collapsible core and method of using same

Details Collapsible core and method of using same Collapsible core and method of using same

1980-12-22

1982-12-07

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

164132, 249 62, 249 63, 249134, 249135, 249175, 264332, B28B 114, B28B 720

Patent

active

043626866

ABSTRACT:
Thermally collapsible core of three to five solid carbonaceous segments of generally equal volume and of wedge-like shape arranged around a collapse axis of the core in narrowly spaced apart relation to each other. Core includes spacers occupying a minor portion of the narrow spacing nearest the external periphery of the core and which are made of metal, glass, ceramic or mixtures thereof having a melting point below the highest temperature to which the core is subjected by molten material solidifying therearound, e.g. fusion-cast refractory. The segments are the larger parts of the core. Heat transferred from solidified molten material to core causes spacers to melt and allow segments to collapse inwardly toward collapse axis to accommodate cooling shrinkage of casting without cracking. Melted spacers can drain downwardly out of core. Design yields highly quenched microstructure in fusion-cast refractory, which is especially beneficial in tap hole blocks for steelmaking furnaces and vessels.

REFERENCES:
patent: 1683475 (1924-09-01), Littell
patent: 1698308 (1929-01-01), Lemcke
patent: 1929842 (1933-10-01), Forster
patent: 1946451 (1934-02-01), Bailey
patent: 1948653 (1934-02-01), Emery et al.
patent: 1993438 (1935-03-01), Flammang et al.
patent: 2004378 (1935-06-01), McMullen
patent: 3506235 (1970-04-01), Katz et al.
patent: 3940102 (1976-02-01), Bedell

Affiliated with

Also associated with

Rating

Collapsible core and method of using same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Collapsible core and method of using same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collapsible core and method of using same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1902790