Thermoplastic resin molded article having hollow portion and method of manufacturing same
US9855700B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Dec 25, 2012 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Feb 26, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a thermoplastic resin molded article having a hollow portion includes setting a molded article (A) premolded from a thermoplastic resin in a first die, forming a melted thermoplastic resin plate (B) in a shape along an inner surface of a second die facing the first die by being attached to the inner surface of the second die by vacuum pressure, welding the thermoplastic resin plate (B) and the molded article (A) only in a predetermined region by mold-clamping the first die and the second die, and forming at least part of an unwelded region as a hollow portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.