Millstone extrusion apparatus
US5217303A · kind A · utility
Inventor
Key dates
| Filing date | Jul 2, 1992 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/251
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extrusion apparatus is provided for the mixing and extrusion of thermo-plastic and thermo-setting materials and the pelletizing of thermo-set materials, in which a rotor member is rotatable within a barrel member. The apparatus is articulated into three sections including a barrel entrance section, a forcing section and a metering section. Each section is provided with helical rotor extrusion grooves, and is followed by a circumferential barrier and a rotor to barrel to rotor mixing zone. The circumferential barrier is provided with a clearance, barrier top to barrel bore, designed to pass fluent material and retarding the over-size and less fluent material. The leading edge of the circumferential barrier is provided with multiple dual purpose plows which, direct the fluent material downstream and the over-size and less fluent material upstream for additional working. The circumferential barrier communicates with the co-acting receiving geometry of the barrel and effects the transfer of the fluent material to the barrel grooves. The barrel grooves co-acting with the smooth surface of the rotor are arranged to have various extrusion rates so as to displace the material longitudin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.