阅读说明：本技术 一种基于巨尾桉原木的胶合板制作工艺 (Plywood manufacturing process based on eucalyptus grandis logs ) 是由 林毅宏 张连章 赖飞家 张明良 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种基于巨尾桉原木的胶合板制作工艺,包括如下生产步骤：第一步：对巨尾桉原木进行去皮和蒸煮；第二步：将蒸煮过的巨尾桉原木进行单板制作；第三步：将制成的单板,进行烘干处理；第四步：对烘干的单板,进行防腐处理；第五步：将防腐处理好的单板进行组装,组装好以后,进行热压成型；第六步：热压成型以后,放在室外进行自然风干冷却；第七步：将冷却完成的巨尾桉原木单板按照规定的尺寸进行裁切；第八步：将裁切好的边角进行打磨。该发明,制作工艺简单合理,制得的胶合板强度大,纹路清晰和不易变形,综合品质高。(The invention discloses a plywood manufacturing process based on eucalyptus grandis logs, which comprises the following production steps: the first step is as follows: peeling and cooking raw eucalyptus grandis; the second step is that: making veneer from the boiled log of the eucalyptus grandis; the third step: drying the prepared veneer; the fourth step: carrying out antiseptic treatment on the dried veneer; the fifth step: assembling the single plates subjected to the antiseptic treatment, and performing hot press molding after the single plates are assembled; and a sixth step: after hot press forming, the mixture is placed outdoors for natural air drying and cooling; the seventh step: cutting the cooled eucalyptus grandis raw wood veneer according to a specified size; eighth step: and polishing the cut corners. The manufacturing process is simple and reasonable, and the manufactured plywood is high in strength, clear in lines, not easy to deform and high in comprehensive quality.)

1. A plywood manufacturing process based on eucalyptus grandis is characterized by comprising the following steps: comprises the following production steps:

the first step is as follows: peeling and cooking raw eucalyptus grandis;

the second step is that: making veneer from the boiled log of the eucalyptus grandis;

the third step: drying the prepared veneer;

the fourth step: carrying out antiseptic treatment on the dried veneer;

the fifth step: assembling the single plates subjected to the antiseptic treatment, and performing hot press molding after the single plates are assembled;

and a sixth step: after hot press forming, the mixture is placed outdoors for natural air drying and cooling;

the seventh step: cutting the cooled eucalyptus grandis raw wood veneer according to a specified size;

eighth step: and polishing the cut corners.

2. The process for making plywood based on eucalyptus grandis log as claimed in claim 1, wherein: and in the second step, the single plate is formed by cutting, and the thickness of the single plate is 0.5-1 mm.

3. The process for making plywood based on eucalyptus grandis log as claimed in claim 1, wherein: and in the fourth step of antiseptic treatment, the single board is placed in a closed soaking pool, the inside of the soaking pool is filled with the preservative solution, the single board is completely soaked in the preservative solution under pressure, and the single board is soaked for 20-30 minutes and taken out.

4. The process for making plywood based on eucalyptus grandis log as claimed in claim 1, wherein: and the hot-press molding in the step five comprises three times of hot pressing, wherein the first hot-press temperature is 120 ℃ and the hot-press time is 20-40 minutes, the second hot-press temperature is 150 ℃ and the hot-press time is 40-60 minutes, the third hot-press temperature is 180 ℃ and the hot-press time is 60-80 minutes.

5. The process for making plywood based on eucalyptus grandis log as claimed in claim 1, wherein: and (3) cooking in the step one, wherein the temperature is 50-80, and the time is 2-3 days.

6. The process for making plywood based on eucalyptus grandis log as claimed in claim 1, wherein: and in the sixth step, the natural air drying is carried out for 1 to 3 hours in summer and 3 to 5 hours in winter.

Technical Field

The invention belongs to the technical field of eucalyptus grandis log plywood, and particularly relates to a plywood manufacturing process based on eucalyptus grandis logs.

Background

The plywood is formed by assembling rotary-cut wood blocks or thin slices through hot pressing, different processes are often needed for assembly, the existing production process of the plywood generally adopts the steps of rotary cutting wood sections into veneers, gluing the veneers, typesetting, directly carrying out hot pressing after typesetting, trimming and forming after hot pressing, the plywood is prepared by adopting the production process, and the plywood is discovered to be directly glued by adhesives in the use process, has lower strength and can deform or even break under the action of larger acting force, and when the plywood is in a humid environment, the water enters the interior of the plywood and can be degummed, so that the plywood is cracked and layered, and the strength of the plywood is reduced; secondly, in the process of manufacturing the plywood by adopting the rotary-cut veneers, the non-standard rotary-cut veneers generated in the rotary-cut process can not be reasonably applied, and the problem of wood waste is still serious.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a plywood manufacturing process based on eucalyptus grandis logs, which has the advantage of cost saving and solves the problem of serious waste in the prior art.

The invention is realized in this way, a plywood preparation method based on eucalyptus grandis log, including the following production steps:

the first step is as follows: peeling and cooking raw eucalyptus grandis;

the second step is that: making veneer from the boiled log of the eucalyptus grandis;

the third step: drying the prepared veneer;

the fourth step: carrying out antiseptic treatment on the dried veneer;

the fifth step: assembling the single plates subjected to the antiseptic treatment, and performing hot press molding after the single plates are assembled;

and a sixth step: after hot press forming, the mixture is placed outdoors for natural air drying and cooling;

the seventh step: cutting the cooled eucalyptus grandis raw wood veneer according to a specified size;

eighth step: and polishing the cut corners.

Preferably, in the second step, the single plate is formed by cutting, and the thickness of the single plate is 0.5-1 mm.

Preferably, in the fourth step of the corrosion prevention treatment, the single board is placed in a closed soaking pool, the inside of the soaking pool is filled with the corrosion prevention liquid, the single board is completely soaked in the corrosion prevention liquid under pressure, and the single board is soaked for 20-30 minutes and taken out.

Preferably, the hot-press molding in the step five is carried out by three times of hot pressing, the first hot-press temperature is 120 ℃ and the hot-press time is 20-40 minutes, the second hot-press temperature is 150 ℃ and the hot-press time is 40-60 minutes, and the third hot-press temperature is 180 ℃ and the hot-press time is 60-80 minutes.

Preferably, the cooking in the first step is carried out at 50-80 ℃ for 2-3 days.

Preferably, in the sixth step, the natural air drying is carried out for 1 to 3 hours in summer and 3 to 5 hours in winter.

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

1. the invention can improve the durability of the wood by soaking the raw wood with the liquid medicine before cooking, and simultaneously, the process of the invention is more reasonable in application, firstly cooking the raw wood with 50-80 ℃ of water, improving the plasticity of the wood, and simultaneously removing harmful substances in the wood.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following examples are given and detailed below.

The structure of the present invention will be described in detail below.

Example one

The plywood manufacturing process based on the eucalyptus grandis provided by the embodiment of the invention comprises the following production steps:

the first step is as follows: peeling and cooking raw eucalyptus grandis: peeling raw eucalyptus grandis, soaking in the medicinal liquid for 30 min, draining, steaming at 50-80 deg.C for 1-2 days, and absorbing with the medicinal liquid to increase hardness and toughness of the veneer.

The second step is that: the method comprises the following steps of (1) carrying out veneer making on cooked eucalyptus grandis raw wood: placing the cooked eucalyptus grandis into a rotary cutter to be cut into sections or slices to be subjected to rotary cutting to obtain veneers, wherein the thickness of the veneers is 0.5-1mm, waste chippings and strips can be generated in the cutting process, the waste chippings are recycled, and the strips are spliced.

The third step: drying the prepared veneer: after the veneer is obtained, drying is carried out through belt type drying equipment, then the moisture remained in the veneer after drying is distributed, and the moisture content is dried to different degrees according to different requirements, wherein the moisture content is respectively 5%, 10% and 18%.

The fourth step: and (3) carrying out antiseptic treatment on the dried veneer: after the veneer is dried, the veneer is placed into a soaking pool, antiseptic liquid medicine is added into the soaking pool, the veneer is completely soaked in the liquid medicine by increasing different pressures, and different antiseptic degrees are realized by different pressures.

The fifth step: assembling the single boards subjected to the antiseptic treatment, and after the single boards are assembled, performing hot-press forming: and placing the single plate at a specified position for stacking, wherein the stacking height cannot exceed the standard height, and hot pressing is carried out for three times, the first hot pressing temperature is 100 ℃, the hot pressing time is 20 minutes, the second hot pressing temperature is 130 ℃, the hot pressing time is 40 minutes, the third hot pressing temperature is 160 ℃, and the time is 60 minutes.

And a sixth step: after hot press forming, the material is placed outdoors for natural air drying and cooling: the sample plate formed by hot pressing is placed outdoors for natural cooling, so that cracking and internal damage of the plate due to extreme cold and extreme heat are avoided.

The seventh step: cutting the cooled eucalyptus grandis raw wood veneer according to the specified size: and placing the cooled sample plate on a cutting device, cutting according to a specified size to reach the size of a standard plywood, and simultaneously recovering the cut waste.

Eighth step: polishing the cut corners: the cutting opening of cutting can have deckle edge, polishes through abrasive paper and edging machine, polishes and scribbles the wax after accomplishing.

This embodiment, through to water content and hot briquetting's temperature, all strict the accuse, not only improved the structural strength of plywood, also can improve the overall quality of plywood simultaneously.

Example two

A plywood manufacturing process based on eucalyptus grandis logs comprises the following production steps:

the first step is as follows: peeling and cooking raw eucalyptus grandis, namely peeling the raw eucalyptus grandis, soaking the raw eucalyptus grandis in a liquid medicine, taking out the raw eucalyptus grandis after soaking for 50 minutes, draining the raw eucalyptus grandis, putting the raw eucalyptus grandis into a cooker for cooking, wherein the cooking stability is guaranteed to be 80-100 ℃ and not more than 100 ℃, the cooking time is 3 days, the absorption of the liquid medicine is increased in the cooking process, the cooking temperature is increased at the same time, the high-temperature resistance of the board is improved, and harmful substances in the wood can be well removed, so that the quality of the wood is guaranteed.

The second step is that: the method comprises the following steps of (1) carrying out veneer making on cooked eucalyptus grandis raw wood: placing the cooked eucalyptus grandis log into a rotary cutter for cutting into sections or slices for rotary cutting to obtain veneers with the thickness of 2 mm.

The third step: drying the prepared veneer: through the inside that gets into drying equipment with the veneer suspension, when getting into drying equipment inside, rotate and dry, the rotational speed is 10 rotations for 1 minute, guarantees that the veneer can not break because of the rotational speed is too fast, and the efficiency of drying simultaneously is higher.

The fourth step: and (3) carrying out antiseptic treatment on the dried veneer: the surface of the veneer is coated with a layer of anti-corrosion paint, and due to drying, the veneer has certain heat, can quickly absorb the anti-corrosion paint when encountering the anti-corrosion paint, and can be taken out from the coating equipment after the anti-corrosion paint is solidified.

The fifth step: assembling the single boards subjected to the antiseptic treatment, and after the single boards are assembled, performing hot-press forming: and placing the single plate at a specified position for stacking, wherein the stacking height cannot exceed the standard height, and hot pressing is carried out for three times, the first hot pressing temperature is 120 ℃, the hot pressing time is 40 minutes, the second hot pressing temperature is 150 ℃, the hot pressing time is 60 minutes, the third hot pressing temperature is 180 ℃, and the time is 80 minutes.

And a sixth step: and (3) cooling: and (3) putting the formed plywood after hot pressing into cooling equipment for water flushing and cooling, wherein the temperature of water is between-5 and 0 ℃, and quickly cooling the plywood.

The seventh step: cutting the cooled eucalyptus grandis raw wood veneer according to the specified size: the formed plywood was cut regularly.

Eighth step: polishing the cut corners: the cutting opening of cutting can have deckle edge, polishes through abrasive paper and edging machine, polishes and scribbles wax after accomplishing, guarantees the smoothness.

This embodiment, through further control water content and hot pressing temperature, makes the wholeness ability of plywood better, also more durable simultaneously.

EXAMPLE III

A plywood manufacturing process based on eucalyptus grandis logs comprises the following production steps:

the first step is as follows: peeling and cooking raw eucalyptus grandis: firstly peeling raw eucalyptus grandis, then soaking the raw eucalyptus grandis in a liquid medicine, taking out the raw eucalyptus grandis after soaking for 50 minutes, draining the raw eucalyptus grandis, then putting the raw eucalyptus grandis into a cooker for cooking, wherein the cooking stability is guaranteed to be 80-100 ℃, the highest temperature is not more than 100 ℃, the cooking time is 3 days, in the cooking process, the absorption of the liquid medicine is increased, the cooking temperature is increased, the high-temperature resistance of the board is improved, and meanwhile, harmful substances in the wood can be well removed, so that the quality of the wood is guaranteed.

The second step is that: the method comprises the following steps of (1) carrying out veneer making on cooked eucalyptus grandis raw wood: the boiled log of the eucalyptus grandis is put into a rotary cutter to be cut into sections or slices to be rotary-cut, so that a veneer is obtained, the thickness is 3mm, leftover materials are certainly generated in the rotary cutting process, and the leftover materials are recycled.

The third step: drying the prepared veneer: because of the inside of veneer after the rotary-cut, can have the waste heat, carry out quick air-dry cooling through cold wind, just so can get rid of the inside waste heat of veneer totally, guarantee the quality of veneer.

The fourth step: and (3) carrying out antiseptic treatment on the dried veneer: the surface of the veneer is coated with a layer of anti-corrosion paint, the veneer has certain heat due to drying, the anti-corrosion paint can be quickly absorbed when encountering the anti-corrosion paint, and the coated veneer is taken out of the coating equipment after the anti-corrosion paint is solidified

The fifth step: assembling the single boards subjected to the antiseptic treatment, and after the single boards are assembled, performing hot-press forming: and placing the single plate at a specified position for stacking, wherein the stacking height cannot exceed the standard height, and hot pressing is carried out for three times, the first hot pressing temperature is 100 ℃, the hot pressing time is 30 minutes, the second hot pressing temperature is 130 ℃, the hot pressing time is 40 minutes, the third hot pressing temperature is 160 ℃, and the time is 50 minutes.

And a sixth step: cooling after hot press forming: and (3) putting the formed plywood after hot pressing into cooling equipment for water flushing and cooling, wherein the temperature of water is between-5 and 0 ℃, and quickly cooling the plywood.

The seventh step: cutting the cooled eucalyptus grandis raw wood veneer according to the specified size: the cutting opening of cutting can have deckle edge, polishes through abrasive paper and edging machine, polishes and scribbles wax after accomplishing, guarantees the smoothness.

Eighth step: polishing the cut corners: the cutting opening of cutting can have deckle edge, polishes through abrasive paper and edging machine, polishes and scribbles wax after accomplishing, guarantees the smoothness.

This embodiment, through twice quick cooling, detects the quality of plywood, gets rid of inferior product, makes the quality of product higher, and the method is also more swift simultaneously.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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.