Method for form-pressing wood fibre panels and form pressed panels, for example door skins
US5183622A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1990 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Sep 21, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27N7/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method for manufacturing form-pressed wood fibre panels, for example door skins, and panels manufactured according to the method. The process starts from a workable, mass produced panel displaying high thermal conductance, for example a so-called MDF-board or chip board. The panel is preheated to a condition where the wood fibres and the binding agent which binds the wood fibres form a pliable or stretchable composition though still in continous panel-like condition. This preheated panel is fed to a form-pressing device where the pressure is relatively slowly increased from 0 to approximately 30 kg/cm.sup.2 during continuing heat supply to a temperature of around 150.degree.-200.degree. C. Usually this is attained in connection with door skins after a period of approximately 1,5 minutes. Finally, a form-stable, form-pressed panel is removed from the press.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.