Collapsible core and method for producing the collapsible core f

Details Collapsible core and method for producing the collapsible core f Collapsible core and method for producing the collapsible core f

1988-07-28

1989-05-30

Lin, Kuang Y.

Metal founding

Process

Shaping a forming surface

164138, 164369, 164 33, B22C 300

Patent

active

048341657

ABSTRACT:
Disclosed is a collapsible core for use in a casting and a method for producing the collapsible core. The collapsible core comprises a main core body, a first layer formed over the core body, a second layer formed over the first layer, and a third layer formed over the second layer. The second layers includes a thermosetting resin such as low temperature decomposable resin. The low temperature decomposable resin comprises one of urea resin and phenol resin. The thermosetting resin is applied to the first layer by dipping, spraying or brush-painting. This thermosetting resin provides tight bonding to the neighbouring layers.

REFERENCES:
patent: 3903950 (1975-09-01), Lirones
patent: 4413666 (1983-11-01), Page

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