Method and apparatus for the manufacture of blown plastic containers
US6171542A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | May 6, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2023/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Wheel molding apparatus for molding thermoplastic containers or other articles, the apparatus having a multiplicity of sets (10) of opposed, separable radially aligned mold halves (12, 14) that travel in a circular path about a horizontal axis. The inner of the mold halves (14) is separated from the outer of the mold halves (12) at the 12:00 o'clock position of the mold set that includes such mold halves to permit the molded article to be ejected from the mold set. However, the ejection of the molded article should not take place until after the separation of the mold halves, and this requires that the molded article be positively retained within the outer mold half until it is desired to eject the article therefrom. This is accomplished by translation of a translatable pin (16) within a passage (18) of the outer mold half, the translatable pin having an undercut (20) near an end thereof that extends into the article, and preferably into a portion of excess material thereof, and forms an interference fit with the article at an outermost position of the translatable pin, to which the pin is resiliently biased by a spring (22). Ejection of the article is obtained by engaging an exter…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.