Easy-to-load extrustion sizing device
US5480295A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1994 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Aug 30, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2791/006
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sizing device having a series of sets of sizing dies each composed of first and second die elements for use in extruding articles. Each die element is made of a plate having two opposite faces bounded by a peripheral edge. The edge further defines a notch through the plate. The notch in each die element has an open end extending inwardly to a closed end. The first and second die elements can be moved relative to each other from an open position in which the notches are unoccluded to a closed position in which first and second die elements overlie each other in the direction of extrusion and abut with the notches partly occluded by the abutting complementary die element. When the die is closed, the interior closed ends of the notches of the abutting elements of each die overlap to form a passage through the die that determines the shape of the extrusion. Support structure maintains the series of die sets at spaced apart locations in a vacuum extrusion chamber. A pin through the second die elements allows them to pivot relative to the first die elements so that the entire die assembly can be opened together for easy loading and closed together during extrusion. A stop is positioned…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.