Method and device for applying a synthetic binder to an airborne flow of fibers
US7931765B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 24, 2005 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Mar 13, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27N1/0263
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and a device to be used in the process of manufacturing plates, such as fiberboards or the like boards, where the raw material in form of biomass particles, such as wood fibers or the like, applied with a thermosetting binder is spread onto a forming belt to form a mat, and where said mat by means of a hot press is compressed into the desired thickness of the finished plate and the thermosetting binder is hardened. According to the invention the thermosetting binder is applied to the dried biomass particles in an airborne process, where the intense and homogeneous contact of the biomass particles and the droplets of fluent binder are facilitated by the use of ultrasound generated by the use of compressed air, water steam or another gas. Further measures to intensify the contact between the biomass particles and the binder droplets utilizing the dipole moment of the biomass particles, at the same time preventing the binder to stick to the walls of the device, as well as measures and to control moisture content and temperature of the binder-loaded particles are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.