Extrusion and mixing apparatus
US4075712A · kind A · utility
Inventor
Key dates
| Filing date | Dec 22, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Dec 22, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus is provided for the mixing and extruding of thermo-plastic and thermo-setting materials in which a rotor member is rotatable within a barrel member. The members are provided with interacting rotor and barrel helical grooves in the mixing stage of the apparatus which includes a rotor to barrel stock transfer zone and a barrel to rotor stock transfer zone. The grooves of the rotor and barrel members, in the rotor to barrel zone, being sized, with the extrusion capacity of the helical groove in the rotor member decreasing and with the helical groove in the barrel member providing the extrusion capacity for the material. With such a construction relative rotational movement between the barrel and rotor members forces material or stock from the groove in the rotor member into the groove of the barrel member at an approximate uniform rate along the length of the rotor to barrel zone. Material or stock not transferred and remaining in the groove of the rotor member is conveyed forwardly as a result of the aforesaid relative rotational movement between the barrel and rotor members. The apparatus includes material or stock reorienting means in the portion of the barrel member, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.