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US 5,472,770 AGranted
Abrasion resistant pattern
Assignee501 Fuji Toryo Co. Ltd.
InventorsDaisuke Sato, Nobuo Hirose
Life of this patent
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Abstract
An abrasion resistant pattern is provided. This pattern is composed of a pattern and a paint film coated thereon, which film includes about 5% or more by volume of powder material having a New Mohs' hardness of 6 or more. This pattern can bear the repeated impact of the casting sand, and can be used to lower casting costs.
Claims6
An improved construction for a pattern member for the repetitive impact forming of casting molds from silica base casting sand of abrasive character, comprising
- a rigid base member having a selectively shaped surface portion adapted to be compressively displaced into an unformed mass of casting sand to form a sand mold having a surface complemental to that of said selectively shaped surface portion,
- said selectively shaped surface portion of said base member having a thin continuous abrasion resistant coating adhesively disposed thereon and formed of the dry residue of a resinous carrier film having uniformly dispersed therein at least about 5% to 65% by volume of finely divided particulate material of a New Mohs' hardness in excess of that of the casting sand and of a minimum New Mohs' hardness of at least 6 for interposed interfacial contact with said casting sand in the formation of sand molds therefrom.
Dependencies are inferred from the claim text.