Manufacturing method for a synthetic resin hollow member and manufacturing apparatus therefor
US6372170B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 2, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Jun 2, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/0067
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing a synthetic resin hollow member wherein using a die slide injection molding machine comprising a stationary die having a series of molding portions formed lengthwise in male-female-female-male sequence, and a movable die having a series of molding portions formed lengthwise in female-male-female sequence, the manufacturing method comprising the following steps: a die clamping step; an injection step for molding two half bodies for the present cycle in a male/female combination of molding portions and joining two half bodies from preceding cycle in a combination of female molding portions; a removal step for opening the dies and removing the finished hollow member; a die sliding step for sliding the dies lengthwise a specific distance relative to each other in a reverse direction of that in the previous cycle; these steps are then repeated to manufacture one hollow member with each die sliding step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.