Structure and method for molding optical disks
US6508961B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Dec 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/81
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for molding an optical disk includes applying a thermally insulative mold insert onto a thermally conductive mold form by coating the mold insert on the mold form. The mold insert has a coefficient of thermal expansion compatible with the coefficient of thermal expansion of the mold form and includes an adhesion promoting material. The method further includes positioning the coated mold form in a thermally conductive mold apparatus with the mold insert positioned between the mold form and the mold apparatus; injecting a molten thermoplastic material into the mold apparatus; retaining the molten thermoplastic material in the mold apparatus for a time sufficient for the molten thermoplastic material to cool below its glass transition temperature to form the optical disk; and ejecting the optical disk from the mold apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.