Vehicle body frame, die-cast product, mold for die-cast product and die-cast method
US7726382B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2006 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Aug 9, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A mold and a die-cast manufacturing method for the die-cast product, in which a main frame which is contiguously formed with a head pipe constitutes a portion of a hollow light-weight-metal-made vehicle-body frame. The mold includes a core for forming an inner space of the hollow vehicle-body frame. The core includes a core body and a plurality of splints mounted on the core body, the splints having approximately elliptical cross-sectional shapes. The long axes direction of ellipses of the splints are set parallel to a mold split surface of the mold. As a result, measurement of the positional accuracy of the splints is facilitated, a clearance between the splint and the mold can decrease by increasing the dimensional accuracy of splint mounting portions of the mold based on sizes of the splints, and the frame can be manufactured with high dimensional accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.