Process for producing a bumper for a vehicle
US6068807A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1996 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Nov 1, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/3044
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a bumper for a vehicle uses a first step of injecting an outer layer forming material into a bumper forming cavity through a gate in a mold, and a second step of injecting a core forming material, thereby allowing the core forming material to flow into the outer layer forming material existing in said gate and said cavity, while allowing the outer layer and core forming materials to flow within the cavity. In the mold, the volume of a mounting portion forming area of the bumper forming cavity is set so that the thickness t.sub.1 of at least a mounting portion of the bumper for mounting to a vehicle body to extend laterally from a central portion of the vehicle body can be larger than the thickness t.sub.2 of a bumper main portion excluding the mounting portion, and the gate opens into the mounting portion forming area. Thus, the outer layer forming material can be allowed to flow substantially uniformly over the entire cavity, thereby enhancing the filling rate of the core forming material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.