Rotary mold extrusion molding process of screw pump rotor
US11731180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2022 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Jan 6, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present disclosure relates to the field of screw pump technologies, and in particular to a rotary mold extrusion molding process of a screw pump rotor. The rotary mold extrusion molding process of a screw pump rotor includes: performing isothermal spheroidizing annealing for a metal embryo material after treating the metal embryo material ultrasonically for 8˜30 s; performing cylindrical turning for the annealed metal embryo material and then performing sand-blasting, and soaking the metal embryo material in saponified oil for 10˜30 min for lubrication treatment, where the saponified oil contains a nano-silicon carbide of 0.5%˜8% which is a nano-silicon carbide mixture with particle sizes of 20˜60 nm and 140˜200 nm with a mixed weight ratio of 1:(2.8˜4); at room temperature, placing the metal embryo material into an extrusion cylinder to perform rotary mold extrusion molding so as to obtain a finished product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.