CN103496023B - Method for manufacturing solid wood multilayer composite floor - Google Patents

Abstract

The invention discloses a method for manufacturing a solid wood multilayer composite floor, which comprises the following process steps: 1. sorting logs, 2, thermally modifying logs, 3, processing veneers, 4, sorting veneers, 5, assembling base materials, 6, cold pressing, 7, hot pressing, 8, preserving, 9, veneering, 10, grooving, 11, coloring, 12, returning to a kiln, and 13, painting; according to the invention, through modification treatment on the wood, the characteristics of the wood are improved, the wood is not easy to deform, the correspondingly prepared solid wood multilayer composite floor is stable in size structure and small in deformation, the problem that the existing solid wood multilayer composite floor is easy to deform due to poor size stability is fundamentally solved, the solid wood multilayer composite floor is more durable, the floor cannot be replaced due to excessive deformation of the floor, the process flow is strict, and the quality of a finished product is good.

Description

A kind of manufacturing method of solid wood multi-layer composite floor

technical field

The invention relates to a method for manufacturing solid wood multilayer composite flooring.

Background technique

With the improvement of living standards, people are used to laying wooden floors with better foot feel indoors to look beautiful and elegant, and to make the living environment more comfortable. Since the use effect of solid wood multi-layer composite flooring is better than that of solid wood flooring, most of the wooden floors on the market are solid wood multi-layer flooring. The resulting solid wood multi-layer composite floor generally has the problem of being easily deformed due to poor dimensional stability of the floor. The purpose of the present invention is to improve the existing production process of solid wood multi-layer flooring to solve the problem of poor dimensional stability of the existing solid wood multi-layer floor.

Contents of the invention

In order to overcome the deficiencies in the prior art, the technical solution provided by the invention is:

A method for manufacturing solid wood multilayer composite flooring, comprising the following process steps:

1) Log sorting: select substrate logs and panel logs;

2) Thermal modification of logs: put the logs into a heat treatment tank with airtight vacuum, heat to 60°C and feed steam, the temperature of the steam is between 170°C and 210°C, and the feed time is 17 to 19 hours. Stop steaming, and when the temperature drops to 40°C, open the tank and take out the logs, and keep them healthy at room temperature for 2 to 3 days;

3) Veneer processing: Process the substrate veneer with a thickness of 1.2mm to 2.0mm and the panel veneer with a thickness of 0.6mm to 2.0mm, and dry the veneer so that the moisture content of the substrate veneer is controlled at Between 6% and 12%, the moisture content of the panel veneer is controlled between 6% and 10%;

4) Veneer sorting: Sorting, repairing and splicing the base veneers, sorting the panel veneers according to the texture and color difference grades and marking the elastic surface;

5) Substrate assembly: two substrate veneers are bonded by glue in the direction perpendicular to each other with adjacent textures;

6) Cold pressing: put the base material assembled into a cold pressing machine for cold pressing, the pressure of cold pressing is 9.7-11.1 MPa, and the time is 30-40 minutes;

7) Hot pressing: within 2 hours after the cold pressing is completed, put the base material into a hot pressing machine for hot pressing. ℃;

8) Health preservation: place the base material on a flat place for 5-7 days, and control the surface temperature of the base material below 40°C;

9) Veneering: after trimming the base material, the base material is veneered by pressing and pasting to make a slab. The temperature of the veneer hot pressing is 125°C-135°C, and the time is 300-350 seconds , the pressure is 11.1～13MPa;

10) rebate: set up rebate on the slab;

11) Coloring: color the slab according to the actual needs, but color adjustment and color testing are required before coloring;

12) Returning to the kiln: after the coloring is completed, dry the slab with a drying kiln at a temperature of 50±5°C, and the drying time is more than 2 hours, so that the moisture content of the slab is controlled between 7% and 11%;

13) Paint: Spray the primer and finish paint on the floor surface according to the requirements to make a solid wood multi-layer composite floor.

The beneficial effects of the invention are: the present invention improves the characteristics of the wood by modifying the wood so that the wood is not easily deformed, and the corresponding solid wood multi-layer composite floor has a stable size and structure and a small amount of deformation, which fundamentally solves the problem of existing problems. Some solid wood multi-layer composite floors are easy to deform due to poor dimensional stability, so that the solid wood multi-layer composite floor is more durable, and the floor will not be replaced due to excessive deformation of the floor. The process is strict and the quality of the finished product is good.

Detailed ways

Below in conjunction with embodiment the present invention is further described.

As a preferred embodiment of the present invention, the manufacture method of solid wood multilayer composite floor is as follows:

1 Log sorting: select high-quality substrate logs with a diameter of 10cm, preferably eucalyptus; select high-quality panel logs;

2 Thermal modification of logs: put the logs into a closed vacuum heat treatment tank, heat them to 60°C and pass steam in 5 stages: ①Steam at 170°C for 1.5 hours, ②Steam at 180°C for 2.5 hours, ③Steam at 190°C for 3.5 hours, ④Steam at 200°C for 4.5 hours, ⑤Steam at 210°C for 5.5 hours, stop steaming, and when the temperature drops to 40°C, open the tank and take out the logs. 3 days of health preservation; improve the characteristics of wood, so that the wood is not easy to deform;

3. Veneer processing: use rotary cutting to process the substrate veneer with a thickness of 1.6mm, and use rotary cutting or slicing to process the panel veneer with a thickness of 1.3mm; and dry the veneer, and the base veneer The moisture content of the veneer is controlled between 6% and 12%, and the moisture content of the panel veneer is controlled between 6% and 10%;

4 Veneer sorting: Sorting, repairing and splicing the substrate veneers, sorting the panel veneers according to the texture and color difference level and marking the elastic surface;

5 Substrate assembly: When forming blanks, apply glue between two substrate veneers, the amount of glue applied is 230±10g/㎡, so that the substrate veneers are bonded in the direction of the grain, and the obtained substrate is Good bonding effect, stable dimensional structure and small deformation;

6. Cold pressing: put the base material assembled into a cold pressing machine for cold pressing. The cold pressing pressure is 11.1MPa and the time is 40 minutes;

7 Hot pressing: within 2 hours after the cold pressing is completed, put the substrate into a hot pressing machine for hot pressing. The hot pressing pressure is 13.1MPa, the time is 480 seconds, and the temperature is 130°C;

8 Health preservation: place the substrate on a flat place for 7 days, and the temperature of the substrate surface should be controlled below 40°C;

9 Veneering: After trimming the substrate, press and paste the substrate to make a veneer, so as to make a slab. The temperature of the veneer hot pressing is 130°C, the time is 350 seconds, and the pressure is 11.3MPa;

10 groove: set groove on the slab;

11 Coloring: color the slab according to actual needs, but color adjustment and color testing are required before coloring;

12 kilns: After the coloring is completed, dry the slab with a drying kiln at a temperature of 50°C and a drying time of 3 hours, and control the moisture content of the slab between 7% and 11%;

13 Paint: Spray the primer and topcoat on the floor surface according to the requirements to make a solid wood multi-layer composite floor.

In the above process, health preservation is the process of releasing internal stress by letting the wood and floor stand for a period of time to balance, which can make the wood and floor more balanced and stable.

The solid wood multi-layer composite floor produced by the above process steps has stable dimensional structure and small deformation, which fundamentally solves the problem that the existing solid wood multi-layer composite floor is easy to deform due to poor dimensional stability, and makes the solid wood multi-layer composite floor Floors are more durable and will not require floor replacement due to excessive deformation of the floor.

In order to make the finished floor formaldehyde-free, the glue used in the splicing in step 4, the blank assembly in step 5, and the pressing in step 9 is all commercially available environmentally friendly modified formaldehyde-free bean gum, giving The user provides a formaldehyde-free environment, which is very environmentally friendly; of course, the glue used can also be other types of glue, as long as there is no formaldehyde release in the glue.

Claims (4)

1. a manufacture method for solid wood multi-layer composite floor board, is characterized in that comprising following processing step:

1) log sorting: choose base material log and panel log;

2) log heat modification: log is put in the heat treatment tank of airtight vacuum, be heated to 60 DEG C and pass into steam, pass into the temperature of steam between 170 DEG C ~ 210 DEG C, the time of passing into is 17 ~ 19 hours, stop passing into steam, treat that temperature is down to 40 DEG C, can opening takes out log, health at normal temperatures 2 ~ 3 days;

3) veneer processing: process base material veneer that thickness is 1.2mm ~ 2.0mm and thickness is 0.6mm ~ 2.0mm panel veneer, and drying process is carried out to veneer, make the moisture control of base material veneer between 6% ~ 12%, the moisture control of panel veneer is between 6% ~ 10%;

4) veneer sorting: sorting, repairing, splicing are carried out to base material veneer, counter plate veneer carries out sorting by texture, aberration grade and marks degree of tightness face;

5) base material assembly: formed by adjacent texture mutually perpendicular direction bonding by glue between base material veneer between two;

6) cold pressing: the base material that assembly is good is put into cold press and colds pressing, the pressure of colding pressing is 9.7 ~ 11.1MPa, and the time is 30 ~ 40 minutes;

7) hot pressing: in 2 hours after having colded pressing, puts into hot press and carries out hot pressing by base material, the pressure of hot pressing is 13 ~ 15MPa, and the time is 480 ~ 500 seconds, and temperature is 125 DEG C ~ 135 DEG C;

8) health: base material is placed on smooth local health 5 ~ 7 days, and the plate surface temperature of base material controls below 40 DEG C;

9) veneer: after cutting edge is carried out to base material, adopt the mode overlayed to carry out veneer to base material, thus make slab, the temperature of veneer hot pressing is 125 DEG C ~ 135 DEG C, and the time is 300 ~ 350 seconds, and pressure is 11.1 ~ 13MPa;

10) tongue and groove: offer tongue and groove on slab;

11) paint: according to the actual requirements slab is painted, but need to carry out mixing colours, trying look before colouring;

12) return kiln: after having painted, carry out drying process with dry kiln to slab, temperature is 50 ± 5 DEG C, and drying time, more than 2 hours, makes the moisture control of slab between 7% ~ 11%;

13) paint: the spraying as requested floor surface being carried out to priming paint and finish paint, make solid wood multi-layer composite floor board.

2. the manufacture method of solid wood multi-layer composite floor board according to claim 1, it is characterized in that: in step 2) in, the time passing into steam is divided into 5 stages: the steam 1.5 hours 1. passing into 170 DEG C, 2. the steam 2.5 hours of 180 DEG C is passed into, 3. the steam 3.5 hours of 190 DEG C is passed into, 4. pass into the steam 4.5 hours of 200 DEG C, 5. pass into the steam 5.5 hours of 210 DEG C.

3. the manufacture method of solid wood multi-layer composite floor board according to claim 1, is characterized in that: in step 5) in, glue-spread during assembly is 230 ± 10g/ ㎡.

4. the manufacture method of solid wood multi-layer composite floor board according to claim 1, is characterized in that: step 4) in splicing, step 5) in assembly and step 9) in the used glue that overlays be environment-friendly modified aldehyde-free gum.