Core and pressing head of mold box assembly

Details Core and pressing head of mold box assembly Core and pressing head of mold box assembly

1975-09-29

1976-09-14

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

With foraminous or absorbent means for removal of vehicle or...

Vacuum means

425394, 425352, 425412, 425405R, 425423, B30B 928

Patent

active

039804143

ABSTRACT:
A greater percentage of hole area is provided in opposite leg portions of the semi-cylindrical perforated backing plate of either the core or the pressing head of a mold box assembly, used in the pressing of a slurry into semi-cylindrical bodies of lightweight thermal insulation for pipe, than in the crown portion connecting the leg portions. More uniform density is thereby provided in the pieces of insulation, and breakage during handling before curing is greatly reduced.

REFERENCES:
patent: 2979770 (1961-04-01), Greene et al.
patent: 3128503 (1964-04-01), Hahn et al.
patent: 3158547 (1964-11-01), Smith
patent: 3162895 (1964-12-01), Pusch
patent: 3179726 (1965-04-01), Perry
patent: 3295167 (1967-01-01), Corbin
patent: 3748072 (1973-07-01), Whelan

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