Plywood hot pressing method

A hot-pressing method and plywood technology, applied in the field of plywood hot-pressing, can solve the problems of unstable quality of plywood, poor products, easy degumming, etc., and achieve the effect of reducing delamination and degumming, less air bubbles, and reducing board air bubbles

Inactive Publication Date: 2019-04-19
太和县金鑫木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing plywood production method, the semi-finished plywood after the arrangement is directly hot-pressed, which makes it easy to produce defects such as bubbles and bulges after hot-pressing, and it is easy to degumming in the later stage, the quality of the plywood is unstable, and it is easy to cause defective products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A plywood hot pressing method is characterized in that, according to the following steps:

[0021] Step 1, pre-pressing: dry the sliced ​​veneer, glue it and arrange the boards, and dry the semi-finished plywood after the glued boards. The drying time is 30-40 minutes in summer and 40 minutes in winter. -60 minutes, then put the air-dried semi-finished plywood into the pre-pressing machine for normal temperature pre-pressing, the pre-pressing pressure is 3MPa, and the pre-pressing time is 40 minutes; Carry out surface modification and repair the cracks that appear, and use adhesive tape to bond and connect the slits in the middle of the board. After the repair is completed, carry out the next step of hot pressing;

[0022] Step 2, hot pressing: Put the pre-pressed plywood semi-finished product into the plywood heat press machine, turn on the heat press to pressurize the plywood semi-finished product, the pressurized pressure is 8MPa, and the holding time is set to 15 mi...

Embodiment 2

[0026] A plywood hot pressing method is characterized in that, according to the following steps:

[0027] Step 1, pre-pressing: dry the sliced ​​veneer, glue it and arrange the boards, and dry the semi-finished plywood after the glued boards. The drying time is 30-40 minutes in summer and 40 minutes in winter. -60 minutes, then put the air-dried semi-finished plywood into the pre-pressing machine for pre-pressing at room temperature, the pre-pressing pressure is 5MPa, and the pre-pressing time is 30 minutes; Carry out surface modification and repair the cracks that appear, and use adhesive tape to bond and connect the slits in the middle of the board. After the repair is completed, carry out the next step of hot pressing;

[0028] Step 2, hot pressing: put the pre-pressed plywood semi-finished product into the plywood hot press machine, turn on the hot press to pressurize the plywood semi-finished product, the pressurized pressure is 10MPa, and the holding time is set to 15 mi...

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PUM

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Abstract

The invention discloses a plywood hot pressing method. The plywood hot pressing method comprises the following steps of 1, pre-pressing, wherein a sliced veneer is dried in the air, laminated and thenarranged, a plywood semi-finished product after the laminating and arranging is aired, and then the aired plywood semi-finished product is putted into a pre-pressing machine for normal-temperature pre-pressing; 2, hot pressing, wherein the pre-pressed plywood semi-finished product is putted into a plywood hot pressing machine, and the hot pressing machine is started to pressurize the semi-finished plywood; 3, pressure relief and moisture removal, wherein a pressure relief valve is opened for relieving pressure and removing moisture for the hot-pressed plywood semi-finished product; and 4, cooling, wherein the plywood after pressure relief is placed on an airing rack for cooling setting, and then the next procedure is carried out for surface finishing. According to the plywood hot pressingmethod, pre-pressing time and pressure of the plywood are controlled, so that the plywood has less foams in hot-pressing, the gluing bonding force is strong and the structure is stable.

Description

technical field [0001] The invention relates to the technical field of plywood processing, in particular to a plywood hot pressing method. Background technique [0002] Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced ​​into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other. [0003] Existing plywood is generally cut into veneer thin boards by wood segments, and then the veneers are glued, then arranged, hot-pressed after the arranged boards, and then the surface is trimmed and formed. In the existing plywood production method, the semi-finished plywood after the arrangement is directly hot-pressed, so that defects such as bubbles and bulges are prone to occur after hot-pressing, and it is easy to degumming in the later stage, the quality of the plywood is unstable,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08B27D5/00
CPCB27D1/08B27D5/00
Inventor 宋奇运宋鑫唐朝钦
Owner 太和县金鑫木业有限公司
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