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:
Jul. 11, 1989
Filed:
Aug. 23, 1988
Masakazu Sato, Utsunomiya, JP;
Keisuke Ban, Utsunomiya, JP;
Bakugo Fujito, Utsunomiya, JP;
Michio Konishi, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Kabushiki Kaisha Teisan Industries, Tokyo, JP;
Abstract
A secondary pressurization casting method, in which molten metal is injected into and filled in a cavity of a mold and then a secondary pressurizing force is exerted upon the filled molten metal by making a secondary pressurization pin advance within a through-hole formed in the wall of the mold. After commencement of filling of the molten metal in the cavity, the secondary pressurization pin placed at an initial set position is once retreated, and subsequently it is made to advance to pressurize the molten metal. A casting fin produced around the outer circumference of the tip end of the secondary pressurization pin during the period when the molten metal is being injected and filled, is integrated with the molten metal entered into the through-hole as a result of the retreat of the secondary pressurization pin, and subsequently it is pushed into the cavity by the secondary pressurization pin. Accordingly, it would never occur that the movement of the secondary pressurization pin is prevented by a wedge effect of a casting film.