Composite extruding apparatus of rubber and method of extruding unvulcanized rubber
US6468067B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Sep 13, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2021/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
With the same screw diameter as in conventional screw extruders, the screw length is reduced, whereby the material residue is reduced, the throughput is increased, the screw motive power is reduced, the temperature control is facilitated to prevent rubber scorching, and extrusion molding of a vulcanizalbe rubber composition is made possible at a lower temperature. In a composite extruding apparatus of rubber, a gear pump 20 is connected to a tip end of a screw extruder 10 via a screen mesh 14 having a breaker plate 15, and a die head 24 is connected to an ejecting side of the gear pump 20, wherein the screw extruder 10 plasticizes a fed rubber composition G mainly by friction with an inner surface of a barrel 12 and by heating from outside and extrudes the rubber composition G from the screen mesh 14 to a space on an inlet side of the gear pump 20; the screen mesh 14 rectifies the rubber composition G passing through the screen mesh 14 towards the gear pump 20 while stirring and plasticizing the rubber composition G by friction and shear; and the gear pump 20 further stirs and platicizes the ruber composition G, which is fed to the space on the inlet side, by shear and compression,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.