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Insulating wood laminating product and preparation method thereof

A technology for products and wood, applied in the field of wood laminate materials, can solve the problems of low surface electrical strength, low tensile strength, high dielectric loss, and achieve the effects of avoiding partial discharge, high mechanical strength, and good mechanical strength

Active Publication Date: 2011-01-12
ZHALANTUN TONGDE WOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fasteners made of phenolic bakelite have low tensile strength, easy to break, low surface electric strength and high dielectric loss

Method used

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  • Insulating wood laminating product and preparation method thereof
  • Insulating wood laminating product and preparation method thereof
  • Insulating wood laminating product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] as attached figure 1 Schematic, which is a schematic diagram of superposition of vertical veneers, and this insulating product can be used to make bolt plates;

[0026] The technical scheme of this embodiment is as follows,

[0027] choose raw material

[0028] (1) Beech veneer with a moisture content of 3%, the thickness of the veneer is 2mm;

[0029] (2) The insulating resin glue is alcohol-soluble phenolic resin glue, with a solid content of 60%, a viscosity of 80-90 seconds (coated with -4 cups, 20°C), and a polymerization speed of more than 100 seconds; the glue can be made by polyvinyl butyrate Mix aldehyde and ethanol at a weight ratio of 1:7 and heat to 70°C, stir until uniform and transparent to form a polyvinyl butyral solution; add about 20% polyvinyl butyral solution and about 6% epoxy resin solution, adjust the viscosity to about 45 In seconds, it becomes a modified alcohol-soluble phenolic resin glue.

[0030] A. Dipping the veneer with glue:

[003...

Embodiment 2

[0044] The difference with the example is that, if figure 2 As shown, the beech veneer is a horizontal single superimposed schematic diagram, and the adjacent veneers 1 and 2 are perpendicular to each other, and the insulating product can be made into a nut plate.

[0045] The insulating glue of the present invention can be purchased directly in the market, and can also be directly produced.

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Abstract

The invention relates to a wood laminating material, in particular to a wood laminating material used for manufacturing transformer connecting pieces and a preparation method thereof, and more particularly relates to a material which can be processed into woody bolt or woody nut with an insulating function. The raw materials of the product provided by the invention comprises broad leaf miscellaneous tree veneers the water content of which is less than 4%, wherein, the thickness of the veneer is 1-2mm; and the adjacent veneers are arranged according to a sequential fiber direction or a mutually vertical fiber direction, and are superposed one by one into an assembly after being soaked in the insulating rubber, and formed after being carried out hot-pressing. The wood laminating material of the invention has good mechanical strength, arc resistance, higher resistivity, lower dielectric loss and a certain self-locking performance after being soaking in the oil. The product of the invention can be further processed into bolt plates or nut plates; the bolts and the nuts manufactured by the invention have the following advantages that each layer of rubber plate is soaked with modified alcohol-soluble phenol aldehyde resin, thus leading that the bolts and nuts have higher mechanical strength and uniform inner structure compared with an electric laminating wood board, avoiding the property of partial discharge generated by bubbles, making up for the shortcomings of the bolts prepared by phenolic bakelite and nylon, and being used in the transformer with the voltage more than 220KV.

Description

technical field [0001] The present invention relates to a wood laminated material, especially a wood laminated material for manufacturing transformer connectors and a manufacturing method thereof, more specifically, a material that can be processed into wooden bolts or nuts with insulating function. Background technique [0002] The fixing of large-scale transformer lead wires is mainly composed of insulating parts such as lead brackets, splints and fasteners. The materials for manufacturing insulating fasteners mainly include phenolic bakelite, nylon and laminated wood. Fasteners made of phenolic bakelite have low tensile strength, are easy to break, have low surface electric strength, and high dielectric loss. For fasteners formed by thermoplastic extrusion of nylon powder, due to the shrinkage of the base material during the molding process, it is difficult to avoid shrinkage cavities inside, forming air bubbles, and partial discharge under high electric field strength. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/08B27D3/00H01F27/29C09J161/14C09J161/06
Inventor 宋春恩郑希清
Owner ZHALANTUN TONGDE WOOD
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