Method and device for manufacturing fiber-reinforced resin molding material
US11643513B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2020 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Jul 21, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing a fiber-reinforced resin molding material having a cut fiber tow impregnated with a resin includes a separation step of intermittently separating a fiber tow and forming at least two separation-processed lines arranged side by side in a width direction of the fiber tow and a cutting step of cutting the fiber tow at an interval in the longitudinal direction, and the separation step and the cutting step are carried out to satisfy (1) to (3). (1) 1≤c/L≤50 (2) c<a (3) b/L<1 “c” is an overlapping length of separated parts when one separation-processed line is projected to another separation-processed line adjacent thereto in the width direction, “L” is the interval in the cutting step, “a” is a length of the separated part in the separation-processed line, and “b” is a length of an unseparated part in the separation-processed line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.