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Routing plate processing technique

A processing technology, engraving and milling technology, applied in the direction of wood processing equipment, manufacturing tools, thin wood chip manufacturing, etc., can solve the problems of unreasonable density distribution, high formaldehyde emission, low board strength, etc., to reduce pre-curing time, Stable mechanical properties and reduced formaldehyde emission

Active Publication Date: 2008-11-05
DARE WOOD BASED PANEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, MDF was often not suitable for engraving and milling due to reasons such as unreasonable density distribution, low or high strength of the board, and high formaldehyde emission.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0011] A milling board processing technology, the processing steps are: chipping and screening of wood: chipping tree species with similar specific gravity into wood chips of uniform size; pre-cooking and steaming: pre-cooking the chipped wood chips with saturated steam Cook for 3 minutes, the pre-cooking temperature is 90°C, and then cook for 3 minutes, the cooking temperature is 165°C; fiber separation: defibrate the cooked wood chips through a thermal mill, and the obtained wood fibers have ≥36 meshes accounting for the total fiber weight 10% of the total fiber weight, ≤200 meshes accounted for 5% of the total fiber weight; preparation of E1 grade urea-formaldehyde glue: After heating the formaldehyde in the container to 30°C, add NaOH with a mass concentration of 30% to adjust the pH value to 8.5; add the first batch of urea , the amount added is 35% of the mass of formaldehyde. After stirring until the temperature is balanced, measure the pH value to 8.3-8.5; heat up to 65...

Embodiment 2

[0013]A milling board processing technology, the processing steps are: chipping and screening of wood: chipping tree species with similar specific gravity into wood chips of uniform size; pre-cooking and steaming: pre-cooking the chipped wood chips with saturated steam Cook for 5 minutes, the pre-cooking temperature is 100°C, and then cook for 5 minutes, the cooking temperature is 175°C; fiber separation: defibrate the cooked wood chips through a thermal mill, and the obtained wood fibers have ≥36 meshes accounting for the total fiber weight 20%, ≤200 mesh accounts for 10% of the total fiber weight; preparation of E1 grade urea-formaldehyde glue: After heating the formaldehyde in the container to 35°C, add NaOH with a mass concentration of 30% to adjust the pH value to 8.8; add the first batch of urea , the amount added is 35% of the mass of formaldehyde. After stirring until the temperature is balanced, measure the pH value to 8.5; heat up to 65-83°C, measure the pH value at 7...

Embodiment 3

[0015] A milling board processing technology, the processing steps are: chipping and screening of wood: chipping tree species with similar specific gravity into wood chips of uniform size; pre-cooking and steaming: pre-cooking the chipped wood chips with saturated steam Cook for 4 minutes, the pre-cooking temperature is 95°C, and then cook for 4 minutes, the cooking temperature is 170°C; fiber separation: defibrate the cooked wood chips through a thermal mill, and the obtained wood fibers have ≥36 meshes accounting for the total fiber weight 15% of the fiber, ≤200 meshes accounted for 8% of the total fiber weight; preparation of E1 grade urea-formaldehyde glue: After heating the formaldehyde in the container to 33°C, add NaOH with a mass concentration of 30% to adjust the pH value to 8.7; add the first batch of urea , the amount added is 35% of the mass of formaldehyde. After stirring until the temperature is balanced, measure the pH value to 8.4; heat up to 65-83°C, measure th...

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Abstract

The invention provides a processing technology for a routing plate, comprising the processing steps as follows: chipping and selecting of wood, pre-steaming and steaming, fiber separation, preparing the E1-class urea-formaldehyde, preparing the curing agent, adding the urea-formaldehyde, curing agent and paraffin, drying the fiber of the added the urea-formaldehyde, curing agent and paraffin, uniformly paving the dried wood fiber and smoothly pre-pressing the wood fiber under the pressure of 3.0-5.0MPa, heat pressing under the temperature of 180-185 DEG C, cooling, quenching and tempering, sanding and sawing, classifying and packaging. The plate prepared by the process has reasonably distributed density, moderate strength and low release quantity of formaldehyde.

Description

1. Technical field [0001] The invention belongs to the field of wood-based panel processing, and in particular relates to a process for processing engraved and milled panels. 2. Background technology [0002] Existing technology: In recent years, my country's wood-based panels have achieved great development, and in 2006 it has exceeded 70 million m 3 , the market competition is very severe; with the increasing awareness of the environment, health and life, people pay more and more attention to functional green wood-based panel products. In order to adapt to this development trend, further tap the potential of the enterprise, and create greater profits, our company has developed a functional E1 grade MDF suitable for engraving and milling, and put it into mass production. In the past, MDF was often not suitable for engraving and milling because of unreasonable density distribution, low or high strength of the board, and high formaldehyde emission. 3. Contents of the inven...

Claims

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Application Information

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IPC IPC(8): B27N3/04B27L5/00D21B1/14B27N1/02B27N3/08B27N3/12B27N3/18C09J161/24
Inventor 金岭朱丽军闻文高宏伟
Owner DARE WOOD BASED PANEL GRP
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