CN112757415A - Method for manufacturing laminated base material - Google Patents

Abstract

The invention discloses a method for manufacturing a gluing laminated substrate, which has the technical scheme that: the method comprises the following steps: step one, preparing materials: selecting natural logs, making the natural logs into fixed-length wood sections by using cutting equipment, cooking and softening the wood sections, and then rotary-cutting the wood sections into thin plates by using processing equipment by using wood section annual rings, wherein the processing thickness is controlled to be 2.5-8mm, and the thickness tolerance of the thin plates is controlled to be +/-2 mm; step two, gluing: uniformly coating glue on the surface of the thin plate prepared in the step one by using glue coating equipment, so that the glue on two sides of the thin plate is uniform and has no omission; step three, embryo grouping: according to the symmetry principle, the three layers of the thin plates coated with the glue in the step two are combined into a group by mutually vertically pressing according to the direction of the wood grain fibers of the adjacent layers, and a blank is prepared after the combination is finished; the effects of uniform gluing, difficult cracking, uniform thickness, high hardness, excellent stability, low defective rate, health, environmental protection and environmental protection are achieved.

Description

Method for manufacturing laminated base material

Technical Field

The invention belongs to the field of laminated base materials, and particularly relates to a manufacturing method of a glued laminated base material.

Background

The laminated veneer base material is a three-layer or multi-layer plate-shaped material formed by rotationally cutting wood sections into veneers or slicing battens into thin wood and gluing the veneers by using an adhesive, wherein the laminated veneer base material is usually formed by gluing odd layers of veneers in a way that the fiber directions of the veneers on the adjacent layers are mutually vertical; the plywood is one of common furniture materials, is one of three large plates of an artificial plate, and can also be used as a material for airplanes, ships, trains, automobiles, buildings, packing boxes and the like. A group of veneers are typically assembled and glued perpendicular to each other in the direction of the adjacent layers of wood grain, and the skins and inner sheets are typically symmetrically disposed on either side of the center layer or core. The glued veneer is pressed into the wood grain board blank by the criss-cross matching of the glued veneer according to the wood grain direction under the condition of heating or not heating. The number of layers is generally odd, and a few are even. The difference of physical and mechanical properties in the longitudinal and transverse directions is small. The types of plywood commonly used are plywood, plywood and the like. The plywood can improve the utilization rate of the wood and is a main way for saving the wood.

Reference may be made to chinese patent publication No. CN104441099A, which discloses an anti-deformation glued laminated wood board comprising: the anti-deformation layer is glued on the upper surface of the anti-deformation layer through a glue, the substrate is glued on the lower surface of the anti-deformation layer through the glue, the substrate is a wood fiberboard, the wear-resistant layer is formed by mixing copper oxide powder and quartz powder, the content of the copper oxide powder is 20-30%, the content of the quartz powder is 70-80%, the anti-deformation layer is formed by mixing carbon fiber and polyetherimide, the content of the carbon fiber is 90-95%, and the content of the polyetherimide is 5-10%.

Above-mentioned patent has the wear resistance who improves the plank, can improve holistic rigidity and intensity moreover to make the holistic resistance to deformation performance of plank obtain promoting by a wide margin, improve the advantage of safety in utilization and life, but it also has the defect, if: the plywood has poor quality, uneven bonding strength, easy cracking and poor stability.

Disclosure of Invention

The present invention is directed to a method for manufacturing a laminated adhesive substrate, which solves the above-mentioned problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a method of manufacturing a glued laminated substrate comprising the steps of:

step one, preparing materials: selecting natural logs, making the natural logs into fixed-length wood sections by using cutting equipment, cooking and softening the wood sections, and then rotary-cutting the wood sections into thin plates by using processing equipment by using wood section annual rings, wherein the processing thickness is controlled to be 2.5-8mm, and the thickness tolerance of the thin plates is controlled to be +/-2 mm;

step two, gluing: uniformly coating glue on the surface of the thin plate prepared in the step one by using glue coating equipment, so that the glue on two sides of the thin plate is uniform and has no omission;

step three, embryo grouping: according to the symmetry principle, the three layers of the thin plates coated with the glue in the step two are combined into a group by mutually vertically pressing according to the direction of the wood grain fibers of the adjacent layers, and a blank is prepared after the combination is finished;

step four, drying: drying the blank prepared in the third step in drying equipment, controlling the temperature of the drying equipment to be 85-120 ℃, turning over and continuously drying after drying for 2h until the blank is fully dried, and controlling the moisture of the blank to be 5-15%;

step five, forming: and performing secondary gluing, hot pressing and gluing on the fully dried blank in the step four to finally obtain the laminated base material.

Preferably, the preparation process of the glue in the second step is as follows:

s1, preparing the following components in parts by weight: 10-15 parts of rubber powder, 2-6 parts of butyl acetate, 2-4 parts of chlorosulfonated polyethylene, 2-6 parts of epoxy resin, 0.4-0.8 part of accelerator, 2-8 parts of zinc oxide, 0.5-0.8 part of stearate, 2-4 parts of anti-aging agent and 2-8 parts of carbon fiber;

s2, sequentially putting rubber powder, butyl acetate, chlorosulfonated polyethylene, stearate and carbon fiber into a reaction kettle, mixing, and fully mixing to obtain a mixed solution;

s3, sequentially adding the accelerator, the anti-aging agent and the zinc oxide into the mixed liquid prepared in the step S2, fully mixing, heating to 85 ℃, finally adding the epoxy resin, fully mixing, and cooling to room temperature to obtain the glue.

Preferably, in the step S2, the rotation speed of the reaction kettle is controlled to be 150r/min, the heating speed of the reaction kettle is controlled to be 5 ℃/min, the heating is stopped after the temperature in the reaction kettle is increased to 45-55 ℃, and the temperature is kept at 50 ℃ for continuously mixing for 20-45 min.

Preferably, after the fifth step, the prepared laminated base material is subjected to sampling inspection according to an inspection standard, and if all the laminated base materials are qualified, the laminated base material is packaged and sold.

Preferably, the inspection standards comprise that the surface of the base material is flat and smooth, the multi-layer thin plates are not degummed, the surface is not damaged by sand and pressure, the whole plate has no obvious color difference, the dimensional processing precision is not wrong, the thickness deviation is not caused, and the bonding strength is more than 0.7 Mpa.

Preferably, the symmetry principle includes a texture arrangement principle and an odd layer principle, the texture arrangement principle includes that the fiber arrangement directions of the sheets of the adjacent layers form right angles with each other or reduce the value of the separation angle to minimize the anisotropy of the finished product, and the odd layer principle includes that the number of layers of the sheets is reduced for the purpose of reducing the production cost.

Preferably, the natural log is a high-quality log with an average tree diameter of more than 30cm, no plant diseases and insect pests, no knots, no cracks and no notches.

Preferably, the hot pressing comprises the steps of placing the blank in hot pressing equipment, starting the hot pressing equipment to increase the surface pressure to 12-16Mpa and the temperature to 120-.

Preferably, the fifth step further comprises putty plastering, edge sawing and sanding.

Preferably, the putty smearing comprises the steps of smearing cracks and holes of the blank by using putty with the same color as the surface of the blank, and scraping the redundant putty to ensure that the surface of the blank is smooth and flat;

the edge sawing comprises the steps of cutting redundant edge materials on two sides of a blank by using a saw blade, removing the edge defects of the blank, and controlling the sawed blank to have square four corners, straight plate edges, no edge hitting and no burr;

the sanding comprises the step of controlling the thickness of the sanding plate to be 5 mm.

Compared with the prior art, the invention has the beneficial effects that:

according to the manufacturing method of the glued laminated base material, the glued laminated base material prepared by the method is uniform in gluing, good in strength, uniform in thickness, high in hardness and excellent in stability, the defective rate of products is remarkably reduced, and the production benefit is improved.

Drawings

FIG. 1 is a schematic flow diagram of the present invention;

fig. 2 is a flow chart of the glue process of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A method of manufacturing a glued laminated substrate comprising the steps of:

step one, preparing materials: selecting natural logs, making the natural logs into fixed-length wood sections by using cutting equipment, cooking and softening the wood sections, then rotary-cutting the wood sections into thin plates by using processing equipment by using wood section annual rings, controlling the processing thickness to be 4mm, and controlling the thickness tolerance of the thin plates to be +/-2 mm;

step two, gluing: uniformly coating glue on the surface of the thin plate prepared in the step one by using glue coating equipment, so that the glue on two sides of the thin plate is uniform and has no omission;

step three, embryo grouping: according to the symmetry principle, the three layers of the thin plates coated with the glue in the step two are combined into a group by mutually vertically pressing according to the direction of the wood grain fibers of the adjacent layers, and a blank is prepared after the combination is finished;

step four, drying: drying the blank prepared in the third step in drying equipment, controlling the temperature of the drying equipment to be 85 ℃, turning over and continuously drying after drying for 2 hours until the blank is fully dried, and controlling the moisture of the blank to be 6%;

step five, forming: and performing secondary gluing, hot pressing and gluing on the fully dried blank in the step four to finally obtain the laminated base material.

In this embodiment, preferably, the preparation process of the glue in the second step is as follows:

s1, preparing the following components in parts by weight: 15 parts of rubber powder, 6 parts of butyl acetate, 4 parts of chlorosulfonated polyethylene, 2 parts of epoxy resin, 0.4 part of accelerator, 2 parts of zinc oxide, 0.5 part of stearate, 2 parts of anti-aging agent and 4 parts of carbon fiber;

s2, sequentially putting rubber powder, butyl acetate, chlorosulfonated polyethylene, stearate and carbon fiber into a reaction kettle, mixing, and fully mixing to obtain a mixed solution;

s3, sequentially adding the accelerator, the anti-aging agent and the zinc oxide into the mixed liquid prepared in the step S2, fully mixing, heating to 85 ℃, finally adding the epoxy resin, fully mixing, and cooling to room temperature to obtain the glue.

In this embodiment, preferably, in S2, the rotation speed of the reaction kettle is controlled to 150r/min, the temperature rising speed of the reaction kettle is controlled to 5 ℃/min, the temperature rising is stopped after the temperature in the reaction kettle rises to 55 ℃, and the temperature is kept at 50 ℃ for continuously mixing for 20 min.

In this embodiment, preferably, after the fifth step, the produced laminated substrate is subjected to sampling inspection according to an inspection standard, and if all the inspection standards are qualified, the laminated substrate is packaged and sold.

In the embodiment, the inspection standards preferably include that the surface of the base material is flat and smooth, the multi-layer thin plates are not degummed, the surface is not damaged by sand and pressure, the whole plate has no obvious color difference, the dimensional processing precision is not wrong, the thickness deviation is not caused, and the bonding strength is more than 0.7 Mpa.

In this embodiment, preferably, the symmetry principle includes a texture arrangement principle and an odd layer principle, the texture arrangement principle includes that the fiber arrangement directions of the sheets of the adjacent layers are at right angles to each other or the separation angle is reduced to minimize the anisotropy of the finished product, and the odd layer principle includes that the number of layers of the sheets is reduced for the purpose of reducing the production cost.

In the embodiment, the natural logs are preferably high-quality logs with the average tree diameter of more than 30cm, no plant diseases and insect pests, no knots, no cracks and no notches.

In this embodiment, preferably, the hot pressing includes placing the blank in a hot pressing device, then starting the hot pressing device to increase the surface pressure to 12Mpa and the temperature to 120 ℃, then performing heat preservation and hot pressing, continuously performing heat preservation and hot pressing for 20min, then gradually reducing the surface pressure to 8Mpa and keeping the temperature unchanged, performing heat preservation and hot pressing, then performing heat preservation and hot pressing for 10min, and finally reducing the surface pressure to 0Mpa and stopping the machine.

In this embodiment, preferably, the fifth step further includes putty applying, edge sawing and sanding.

In this embodiment, preferably, the putty applying includes applying putty, which has the same color as the surface of the blank, to the cracks and holes of the blank, and scraping off the excess putty to make the surface of the blank smooth and flat;

trimming comprises cutting redundant trimmings on two sides of the blank by using a saw blade, removing the edge defects of the blank, and controlling the square and straight four corners of the trimmed blank, flat and straight plate edges, no trimming and burr phenomena;

sanding involves controlling the thickness of the sanded plate to 5 mm.

The working principle and the using process of the invention are as follows:

according to the manufacturing method of the glued laminated base material, the glued laminated base material prepared by the method is uniform in gluing, good in strength, uniform in thickness, high in hardness and excellent in stability, the defective rate of products is remarkably reduced, and the production benefit is improved.

Example 2

A method of manufacturing a glued laminated substrate comprising the steps of:

step one, preparing materials: selecting natural logs, making the natural logs into fixed-length wood sections by using cutting equipment, cooking and softening the wood sections, then rotary-cutting the wood sections into thin plates by using processing equipment by using wood section annual rings, controlling the processing thickness to be 3mm, and controlling the thickness tolerance of the thin plates to be +/-2 mm;

step two, gluing: uniformly coating glue on the surface of the thin plate prepared in the step one by using glue coating equipment, so that the glue on two sides of the thin plate is uniform and has no omission;

step three, embryo grouping: according to the symmetry principle, the three layers of the thin plates coated with the glue in the step two are combined into a group by mutually vertically pressing according to the direction of the wood grain fibers of the adjacent layers, and a blank is prepared after the combination is finished;

step four, drying: drying the blank prepared in the third step in drying equipment, controlling the temperature of the drying equipment to be 120 ℃, turning over and continuously drying after drying for 2 hours until the blank is fully dried, and controlling the moisture of the blank to be 8%;

step five, forming: and performing secondary gluing, hot pressing and gluing on the fully dried blank in the step four to finally obtain the laminated base material.

In this embodiment, preferably, the preparation process of the glue in the second step is as follows:

s1, preparing the following components in parts by weight: 10 parts of rubber powder, 2 parts of butyl acetate, 2 parts of chlorosulfonated polyethylene, 2 parts of epoxy resin, 0.4 part of accelerator, 2 parts of zinc oxide, 0.5 part of stearate, 2 parts of anti-aging agent and 2 parts of carbon fiber;

s2, sequentially putting rubber powder, butyl acetate, chlorosulfonated polyethylene, stearate and carbon fiber into a reaction kettle, mixing, and fully mixing to obtain a mixed solution;

s3, sequentially adding the accelerator, the anti-aging agent and the zinc oxide into the mixed liquid prepared in the step S2, fully mixing, heating to 85 ℃, finally adding the epoxy resin, fully mixing, and cooling to room temperature to obtain the glue.

In this embodiment, preferably, in S2, the rotation speed of the reaction kettle is controlled to 150r/min, the temperature rising speed of the reaction kettle is controlled to 5 ℃/min, the temperature rising is stopped after the temperature in the reaction kettle rises to 45 ℃, and the temperature is kept at 50 ℃ for continuously mixing for 20 min.

In this embodiment, preferably, after the fifth step, the produced laminated substrate is subjected to sampling inspection according to an inspection standard, and if all the inspection standards are qualified, the laminated substrate is packaged and sold.

In the embodiment, the inspection standards preferably include that the surface of the base material is flat and smooth, the multi-layer thin plates are not degummed, the surface is not damaged by sand and pressure, the whole plate has no obvious color difference, the dimensional processing precision is not wrong, the thickness deviation is not caused, and the bonding strength is more than 0.7 Mpa.

In this embodiment, preferably, the symmetry principle includes a texture arrangement principle and an odd layer principle, the texture arrangement principle includes that the fiber arrangement directions of the sheets of the adjacent layers are at right angles to each other or the separation angle is reduced to minimize the anisotropy of the finished product, and the odd layer principle includes that the number of layers of the sheets is reduced for the purpose of reducing the production cost.

In the embodiment, the natural logs are preferably high-quality logs with the average tree diameter of more than 30cm, no plant diseases and insect pests, no knots, no cracks and no notches.

In this embodiment, preferably, the hot pressing includes placing the blank in a hot pressing device, then starting the hot pressing device to increase the surface pressure to 12Mpa and the temperature to 120 ℃, then performing heat preservation and hot pressing, continuously performing heat preservation and hot pressing for 16min, then gradually reducing the surface pressure to 7Mpa and keeping the temperature unchanged, performing heat preservation and hot pressing, then performing heat preservation and hot pressing for 8min, and finally reducing the surface pressure to 0Mpa and stopping the machine.

The working principle and the using process of the invention are as follows:

according to the manufacturing method of the glued laminated base material, the glued laminated base material prepared by the method is uniform in gluing, good in strength, uniform in thickness, high in hardness and excellent in stability, the defective rate of products is remarkably reduced, and the production benefit is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A method of manufacturing a glued laminated substrate, comprising the steps of:

step one, preparing materials: selecting natural logs, making the natural logs into fixed-length wood sections by using cutting equipment, cooking and softening the wood sections, and then rotary-cutting the wood sections into thin plates by using processing equipment by using wood section annual rings, wherein the processing thickness is controlled to be 2.5-8mm, and the thickness tolerance of the thin plates is controlled to be +/-2 mm;

step two, gluing: uniformly coating glue on the surface of the thin plate prepared in the step one by using glue coating equipment, so that the glue on two sides of the thin plate is uniform and has no omission;

step three, embryo grouping: according to the symmetry principle, the three layers of the thin plates coated with the glue in the step two are combined into a group by mutually vertically pressing according to the direction of the wood grain fibers of the adjacent layers, and a blank is prepared after the combination is finished;

step four, drying: drying the blank prepared in the third step in drying equipment, controlling the temperature of the drying equipment to be 85-120 ℃, turning over and continuously drying after drying for 2h until the blank is fully dried, and controlling the moisture of the blank to be 5-15%;

step five, forming: and performing secondary gluing, hot pressing and gluing on the fully dried blank in the step four to finally obtain the laminated base material.

2. The method of claim 1, wherein: the preparation process of the glue in the second step is as follows:

s1, preparing the following components in parts by weight: 10-15 parts of rubber powder, 2-6 parts of butyl acetate, 2-4 parts of chlorosulfonated polyethylene, 2-6 parts of epoxy resin, 0.4-0.8 part of accelerator, 2-8 parts of zinc oxide, 0.5-0.8 part of stearate, 2-4 parts of anti-aging agent and 2-8 parts of carbon fiber;

s2, sequentially putting rubber powder, butyl acetate, chlorosulfonated polyethylene, stearate and carbon fiber into a reaction kettle, mixing, and fully mixing to obtain a mixed solution;

s3, sequentially adding the accelerator, the anti-aging agent and the zinc oxide into the mixed liquid prepared in the step S2, fully mixing, heating to 85 ℃, finally adding the epoxy resin, fully mixing, and cooling to room temperature to obtain the glue.

3. A method of manufacturing a glue laminated substrate according to claim 2, wherein: and in the step S2, the rotating speed of the reaction kettle is controlled to be 150r/min, the heating speed of the reaction kettle is controlled to be 5 ℃/min, the heating is stopped after the temperature in the reaction kettle is increased to 45-55 ℃, and the temperature is kept at 50 ℃ for continuously mixing for 20-45 min.

4. The method of claim 1, wherein: and after the fifth step, performing sampling inspection on the prepared laminated base material according to an inspection standard, and packaging and selling if all the laminated base material is qualified.

5. The method of claim 4, wherein: the inspection standards comprise that whether the surface of the base material is flat and smooth, whether the multi-layer thin plates are degummed, whether the surface has sand damage and pressure damage, whether the whole plate has obvious chromatic aberration, whether the size processing precision has errors, whether thickness deviation exists and whether the bonding strength is more than 0.7 Mpa.

6. The method of claim 1, wherein: the symmetry principle comprises a texture arrangement principle and an odd layer principle, the texture arrangement principle comprises the step of enabling the fiber arrangement directions of the thin plates of the adjacent layers to form right angles or reducing the value of the separation angle to enable the anisotropy of a finished product to be reduced to be minimum, and the odd layer principle comprises the step of reducing the number of layers of the thin plates with the aim of reducing production cost.

7. The method of claim 1, wherein: the natural log is a high-quality log with the average tree diameter of more than 30cm, no plant diseases and insect pests, no knots, no cracks and no notches.

8. The method of claim 1, wherein: the hot pressing comprises the steps of placing the blank in hot pressing equipment, starting the hot pressing equipment to increase the surface pressure to 12-16Mpa and the temperature to 120-.

9. The method of claim 1, wherein: and step five, putty smearing, edge sawing and sanding are further included.

10. The method of claim 9, wherein the step of forming the adhesive laminate substrate comprises: the putty smearing comprises the steps of smearing cracks and holes of the blank by using putty with the same color as the surface of the blank, and scraping the redundant putty to ensure that the surface of the blank is smooth and flat;

the edge sawing comprises the steps of cutting redundant edge materials on two sides of a blank by using a saw blade, removing the edge defects of the blank, and controlling the sawed blank to have square four corners, straight plate edges, no edge hitting and no burr;

the sanding comprises the step of controlling the thickness of the sanding plate to be 5 mm.

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