Apparatus for manufacturing synthetic resin hollow member incorporating an intermediate element therein
US6981860B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 10, 2001 |
| Grant date | Jan 3, 2006 |
| Priority date | — |
| Expiry date | Jul 11, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/0067
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for manufacturing a synthetic resin-made hollow member incorporating an intermediate element are provided which enable operations of molding half bodies, abutting and joining the half bodies together, and molding an intermediate element in a series of steps, and which eliminate the necessity of such a manual work as may otherwise be required in incorporating the intermediate element into the half bodies. A pair of rotary injection molding dies are used which can be opened and closed relative to each other and are rotatable relative to each other over an angle of 60° for each turn, each die having a half body molding section including one male molding portion and two female molding portions in the direction of rotation for each rotational run over an angle of 120°, each die also having an intermediate element molding portion provided between specified half body molding portions in the direction of each rotational run over an angle of 120°. In each two rotational runs of the molding dies, a series of steps is carried out including first injection for molding a pair of half bodies and an intermediate element, molded product setting for matching two half bodies wit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.