Method of making a hollow plastic article
US4895268A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Aug 17, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7172
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A blow molding process is disclosed for making the products having at least one substantially solid attachment projection unitary with and projecting outwardly from an exterior wall. The process comprises the steps of: PA0 (A) forming a molten plastic parison; PA0 (B) enclosing the parison within a cavity formed by cooperating blow molding die parts, a void in fluid communication with such cavity and having a configuration corresponding to that desired for the attachment projection being provided at a parting line between one and another of the die parts; PA0 (C) introducing fluid pressure into the parison to expand it outwardly within the cavity and to flow molten plastic into the void; and PA0 (D) opening the blow mold and removing the product. A second aspect of the invention provides a motor vehicle fuel tank comprising a blow molded exterior wall having (a) at least one substantially solid attachment projection unitary with and projecting outwardly from an exterior surface of such wall, and (b) a heat shield mounted on such attachment projection in fixed space relation to the exterior surface of the tank wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.