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A kind of manufacturing method of twill plywood

A manufacturing method and technology for plywood, which are used in manufacturing tools, joining of wooden veneers, wood processing appliances, etc., can solve the problems of low in-plane shear strength, large difference between longitudinal strength and transverse strength of bending strength, etc. Achieve uniform mechanical properties in all directions, improve low cross-grain strength, and improve performance.

Inactive Publication Date: 2015-11-18
黑龙江省木材科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the longitudinal strength and transverse strength of the bending strength of the existing plywood are quite different, and the in-plane shear strength is low, and a method for manufacturing twill plywood is provided

Method used

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  • A kind of manufacturing method of twill plywood
  • A kind of manufacturing method of twill plywood
  • A kind of manufacturing method of twill plywood

Examples

Experimental program
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specific Embodiment approach 1

[0020] Specific embodiment one: the manufacturing method of a kind of twill plywood of this embodiment is to carry out according to the following steps:

[0021] 1. Select a veneer with a width of 1320mm, a length of 2540mm, a thickness of 1.5-5.5mm and a moisture content of 8-12%, and obliquely grind the long side of the wood veneer at an angle of tanθ=1 / 8~ 1 / 6, and then apply glue on the oblique grinding place, and press the narrow board hot press to get the lengthened veneer. The hot pressing temperature of the narrow board hot press is 180-190 °C, Pressing time is 30-40s;

[0022] 2. Perform truncation processing at an angle greater than 0 degrees and less than 90 degrees with the wood fiber direction of the lengthened veneer to obtain a parallelogram veneer unit;

[0023] 3. Extend the parallelogram veneer unit along the width direction to obtain a parallelogram veneer; if the parallelogram veneer is connected as the surface plate, the joint width shall not exceed 2mm; i...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment differs from Embodiment 1 in that the wood veneer described in Step 1 is larch, with a thickness of 2.5 mm and a moisture content of 8%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the oblique grinding angle in step 1 is tanθ=1 / 7. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for manufacturing diagonal plywood. The method aims at solving the problem that the longitudinal strength and the transverse strength of existing plywood are large in difference. The method for manufacturing the diagonal plywood comprises the steps that firstly, the end faces of long edges of a wooden veneer are obliquely ground, the obliquely ground portions are coated with glue, pressed and lengthened, and a lengthened veneer is obtained; secondly, the lengthened veneer is cut off and lengthened in the width direction, so that a lengthened parallelogram veneer is obtained; thirdly, adjacent layers of the lengthened parallelogram veneer are continuously assembled in the thickness direction in the mode that wood fiber directions are perpendicular to one another and the two faces of the lengthened parallelogram veneer serving as a core board are coated with glue, prepressing is conducted on the lengthened parallelogram veneer, and then the veneer is cut off; fourthly, a cut blank board is placed in a hot press for hot-pressing, then the edges are trimmed, and therefore the diagonal plywood is manufactured. According to the method, the defect that the transverse strength of the plywood is low is obviously overcome, so that mechanical properties of the plywood tend to be even. The method is applied to the plywood manufacturing field.

Description

technical field [0001] The invention relates to a manufacturing method of twill plywood. Background technique [0002] Wood-based panels (mainly including plywood, fiberboard, particleboard, blockboard, etc.) have always been traditional products in my country's wood industry, and are indispensable intermediate inputs for furniture, wood flooring, construction and other industries. And plywood is the earliest start among my country's wood-based panel products (the plywood manufacturing industry began in 1953, the production of fiberboard began in 1958, and the production of particleboard began in 1962). The advantage product with the fastest development speed and the strongest international competitiveness. With the implementation of the reform and opening up policy, especially in the 1990s, with the continuous heating up of the real estate industry, the rapid development of the hotel industry, furniture industry and interior decoration industry, my country's plywood industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/06B27D1/10
Inventor 林利民孙玉慧刘巍岩王春明杨亮庆张冬梅姜伟利顾颜郑海威
Owner 黑龙江省木材科学研究所