loose core

strip core, blockboard, loose core, strip board

A composite board; a coreboard whose core is made up of strips of wood, either laid separately or glued together; veneer is glued to both faces of the core strips with its grain at right angles to that in the strips.
References in periodicals archive ?
In production, the block is produced basically in an all green sand mold (minimal core application) in which the loose cores are set manually into a mold-setting fixture.