Back to results
US 6,949,161 B2Granted
One step multiple-ply panel pressing
AssigneeLonglac Wood Industries Inc.
InventorJames McPherson
Life of this patent
Estimating the term…
Abstract
A method for making in a single step a multiple-ply panel comprising the steps of forming and sandwiching a raw mat assembly of resinated furnish between two sheets of green incised wood veneer, applying a layer of thermosetting high-moisture tolerant adhesive at interfaces between the green veneer and core mat, and applying pressure and heat to cure the consolidated panel assembly for a duration sufficient to secure good internal bond within the substrate panel.
Claims16
A method for making a multiple-ply wood panel composite comprising the steps of:
- (i) forming a panel substrate by sandwiching an uncured resinated mat between two sheets of green incised wood veneer, said sheets of green veneer having an overall moisture range from 30% to over 100% based on a dry weight of said sheets;
- (ii) applying a thermosetting and moisture compatible adhesive between the veneer sheets and the resinated mat to form an unconsolidated panel;
- (iii) without performing a drying step and a cold processing step, applying pressure and heat to the unconsolidated panel in an amount and for a duration sufficient to inject steam generated from water inside the sheets of green veneer through the incisions toward the mat to substantially simultaneously cure the resin in the mat and the adhesive between the mat and sheets of veneer, whereby green veneers are used to form the multi-ply wood panel composite without performing a drying step and a cold pressing step.
A method of making hardwood, said method consisting essentially of:
- sorting wet green veneers into groups having similar moisture content, said green veneers not being subject to a drying step and having a moisture content above 30% based on dry weight of the sheets;
- selecting two green veneers from the same group of moisture content;
- making incisions through the green veneers;
- applying a binder to a wood mat;
- applying a moisture compatible thermosetting adhesive between inner surfaces of the green veneers and the mat;
- without performing a drying step and a cold processing step, substantially simultaneously curing both the adhesive and binder by hot pressing n unconsolidated panel of the green veneers at a temperature of 130° C.-190° C. for a duration of 4-6 minutes to inject steam generated from water inside the green veneers through the incisions toward the mat to substantially simultaneously cure the resin and the thermosetting adhesive to form a composite panel without requiring the green veneers to be previously dried;
- sanding an outer surface of the panel;
- and
- applying a decorative veneer to the sanded surface of the panel.
6 more elements
Dependencies are inferred from the claim text.