Method for producing a flat particle-faced plywood panel
阅读：764发布：2022-05-28
专利汇可以提供Method for producing a flat particle-faced plywood panel专利检索，专利查询，专利分析的服务。并且A method for minimizing warpage of a plywood assembly having a bonded face of wood particle board or similar material. This is accomplished by curing the particle board layer on a single sheet of veneer, which consequently is used in place of a conventional face veneer in a plywood layup.，下面是Method for producing a flat particle-faced plywood panel专利的具体信息内容。
1. A method of producing a flat laminated wood product having single facing of resin-impregnated wood particles comprising: first pressing a relatively thick wet mat of resin-impregnated wood particles upon one surface of a wood veneer sheet under sufficient pressure and heat to cure the resin and bond it and the particles to the wood veneer to form a composite sheet; subsequently bonding the composite sheet to a backing of wood veneer material, using conventional laminating techniques, the particle face being directed outward at one face of the resulting lamination.
2. A method as set out in claim 1 wherein the step of bonding the composite sheet to a backing of wood veneer material comprises: laying up a plurality of layers of wood veneer with a resin coating applied between adjacent wood veneer surfaces; laying up the composite sheet as an outer or face veneer at one side of said layers of wood veneer with a similar resin coating applied between the adjacent wood veneer surfaces; and subjecting the layers of wood veneer and composite sheet to sufficient heat and pressure perpendicular to the veneer surfaces to cure the resin coatings.
3. A method as set out in claim 1 wherein the step of bonding the composite sheet to a backing of wood material comprises: laying up a plurality of alternately oriented veneers in an assembly comprising a back veneer and core stock assembled thereon; applying a resin coating to the abutting veneer surfaces of the assembly; laying up the composite sheet by placement of its veneer surface in abutment with the side of the core stock opposite to the back veneer; applying a resin coating to the abutting veneer surfaces of the core stock and composite sheet; and subjecting the assembly and composite sheet to sufficient heat and pressure perpendicular to the veneer surfaces to cure the resin coatings.
4. A method as set out in claim 1, wherein the pressing of the mat and wood veneer is carried out with a cushioned caul abutting the mat material surfaces.
5. A method as set out in claim 1, wherein the pressing of the mat is carried out by pressing oppositely facing composite sheet layups separated by a resilient parting sheet separating their respective mats.
6. A method as set out in claim 1 wherein the mat of particles is placed upon the tight side of the wood veneer sheet in forming of the composite sheet.
7. A method as set out in claim 1, wherein the wood particles comprise wood shavings.
8. A method of producing flat laminated veneer assemblies having one face comprising fibrous wood particles bonded by a resin binder, comprising the following steps: laying up the fibrous wood particles and resin binder as a relatively thick mat on the tight surface of a first layer of wood veneer; subjecting the wood veneer and mat to sufficient pressure and heat to cure the resin and bond the cured particle mat to the wood veneer; subsequently laying up additional layers of wood veneer and laminating resin, using the first layer of wood veneer and cured mat as a face veneer with the mat facing outwardly in the assembly, the laminating resin being applied to abutting wood veneer surfaces in each layer; and curing the laminating resin by subjecting the assembly to pressure and heat.
9. A method as set out in claim 8 wherein the additional layers of wood veneer comprise conventional plywood face veneers and core stock laid up in a balanced assembly, the first layer of wood veneer and bonded particle mat substituting for one of the conventional face veneers in such a plywood assembly.
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