The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2018
Filed:
Oct. 19, 2015
Kobe Steel, Ltd., Hyogo, JP;
Kazuyuki Tsutsumi, Kobe, JP;
Kobe Steel, Ltd., Hyogo, JP;
Abstract
An opening is provided in a foam pattern, and a coating agent is applied to the opening. The coating agent applied to the opening is taken as a beam having a sectional secondary moment I (mm), a vertical plate thickness h (mm), and a length L (mm). It is assumed that a volume of a cavity part in the foam pattern is V (mm), a bulk density of the casting sand filling the cavity part is ρs (kg/mm), a gravitational acceleration is g (mm/sec), a density of the melt is ρm (kg/mm), an angle of the opening with respect to a vertical direction is θ, and a transverse strength of the coating agent at the highest temperature during pouring of the melt is σb (MPa). A sectional shape of the opening, the angle θ of the opening, and the transverse strength σb of the coating agent are selected to satisfy the expression:σ(ρ){(/2)sin θ−cos θ}.