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Plywood hot pressing process

A hot pressing process and plywood technology, which is applied in the direction of manufacturing tools, wood processing appliances, and the joining of wooden veneers, and can solve the problems of long hot pressing time and low qualified rate of plywood

Inactive Publication Date: 2019-12-03
新田县永顺木器制品有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the traditional hot-pressing process, the processed gluing has the defects of long hot-pressing time and low pass rate of the processed plywood.

Method used

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  • Plywood hot pressing process
  • Plywood hot pressing process
  • Plywood hot pressing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, in the first heat-pressing stage, turn on the heat-pressing machine and quickly raise the pressure to a surface pressure of 20Mpa and a temperature of 130°C within 0.5s, and carry out the first stage of heat-preservation and heat-pressing. Two-thirds of the pressing time, and then gradually reduce the pressure to the surface pressure of 10Mpa in 0.5s, the temperature remains unchanged, and carry out the heat preservation and hot pressing of the second hot pressing stage. The heat preservation and hot pressing time of the second hot pressing stage is the total heat preservation and hot pressing One-third of the time, the surface pressure gradually drops to 0Mpa within 1 second, and the machine is shut down to unload the plate. The total heat preservation and hot pressing time is 13 minutes.

Embodiment 2

[0031] On the basis of Example 1, specifically as image 3 , Figure 4 , Figure 5 and Figure 6 As shown, the hot press machine includes a body 1, and more than four steam hot-pressing plates 3 are arranged in the inner cavity 2 of the body 1. The stepped platform 4 is stepped from top to bottom. A hydraulic cylinder 5 is provided at the bottom of the inner cavity 2 of the body 1. The piston rod of the hydraulic cylinder 5 is connected to the bottom of the lowest steam hot plate 3. The inner cavity 2 is provided with a combined positioning plate, the combined positioning plate includes a front plate 6 and a rear plate 7 which are symmetrically arranged front and rear, the steam hot pressing plate 3 is movably arranged between the front plate 6 and the rear plate 7, and the steam The inside of the hot pressing plate 3 is provided with a cavity 8, and the upper and lower surfaces are provided with small holes 9, the cavity 8 communicates with the small holes 9, and the small...

Embodiment 3

[0035] On the basis of embodiment 2, specifically as image 3 As shown, the top of the inner cavity 2 is provided with a suction port 13, and the suction port 13 communicates with one end of the suction pipe 14, and the other end of the suction pipe 14 communicates with the suction machine 15. Air machine 15 is arranged on body 1 top. The aspirator 15 will suck away the waste gas generated during hot pressing through the air inlet 13 and the air suction pipe 14 .

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Abstract

The invention relates to a plywood hot pressing process. The process comprises a first hot-pressing stage and a second hot-pressing stage. At the first hot-pressing stage, a hot press is started to enable the pressure to be rapidly increased to the surface pressure15-20 Mpa and the temperature to be 110-160 DEG C within 0.5 s, the heat preservation and hot pressing operation at the first stage iscarried out, and the heat preservation and hot pressing time at the first stage is two thirds of the total heat preservation and hot pressing time; and then the pressure is gradually reduced to the surface pressure of 7-10 Mpa within 0.5 s, the temperature is not changed, the heat preservation and hot pressing operation at the second hot pressing stage is carried out, and the heat preservation andhot pressing time of the second hot pressing stage is one third of the total heat preservation and hot pressing time, the surface pressure is gradually reduced to 0 Mpa within 1 s, the hot press is shut down, and a plywood is unloaded. Compared with a traditional hot pressing process, the plywood hot pressing process is shorter in hot pressing time and higher in product percent of pass.

Description

technical field [0001] The invention relates to the field of plywood processing equipment, in particular to a plywood hot-pressing process. 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. However, using the traditional hot-pressing process, the processed gluing has the defects of long hot-pressing time and low qualified rate of the processed plywood. Contents of the invention [0003] The purpose of the present invention is to improve and innovate on the shortcomings and problems existing in the background technology, and to provide a plywood hot-pressing process that can shorten the hot-pressing time and have a higher qualified rate. [0004] The technical solution of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08
CPCB27D1/08
Inventor 谢富元
Owner 新田县永顺木器制品有限责任公司