Extrusion apparatus
US4872761A · kind A · utility
Inventor
Key dates
| Filing date | May 12, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | May 12, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The apparatus is for the mixing and refining of rubber-like materials, either hot or cold feed, and some thermoplastic materials. It comprises an elongated cylindrical barrel member and an elongated rotor member, disposed coaxially in the interior of said barrel member. The rotor member is provided with a concentric bore, at its downstream end in which a stationary screw-like member is coaxially disposed. Means are provided for relative rotational movement of the rotor member, to the barrel member and to the stationary screw-like member in the treating and axial advancement of the process material. With such a construction, the barrel, rotor and screw-like members have a feed end, a forcing zone, a mixing and refining zone, a stationary screw-like member and discharge end, interposed between the ends of the apparatus. The rotor member of the forcing zone is provided with extrusion grooves or groove, capable of warming, pressurizing and transporting the process material to the mixing and refining zone. The rotor groove which is the continuation of the forcing zone groove design is provided with a two part groove design. The leading portion of the groove design consists of a deep, hi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.