Opening and closing mechanism for portfolio blowing and blowing-stretching mold
US5326250A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1992 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Sep 23, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C49/4236
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mechanism for opening and closing a portfolio blowing or stretching-blowing mold used to manufacture plastic containers. A stationary pin (4) supports two rotating half-molds (3), and two curved control arms (9) are joined at their one ends to the two half-molds on either side of the pin (4). A cam device includes a loose follower roller (16) on a support shaft (16a) parallel to the pin (4), and a guide cam (17) moves the roller perpendicular to (toward and away from) the pin (4). The connection between the roller and the other end of the two arms (9) includes a pair of normally parallel connection rods (13, 14) whose one ends individually support the shaft (16a) and a shaft (10) connecting the other ends of the arms (9), and whose other ends are mounted on a shaft (15) parallel to the shaft (4), the connection rods being oriented transverse to a mold joint plane (M) containing the pin (4) and the shaft (10). The connection rods are coupled by a ball and detent arrangement, which releases in the event of an excessive load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.