CN113290657A - Plywood processing technology - Google Patents
Plywood processing technology Download PDFInfo
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- CN113290657A CN113290657A CN202110563461.XA CN202110563461A CN113290657A CN 113290657 A CN113290657 A CN 113290657A CN 202110563461 A CN202110563461 A CN 202110563461A CN 113290657 A CN113290657 A CN 113290657A
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- veneer
- drying
- plywood
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- flame retardant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/0207—Pretreatment of wood before impregnation
- B27K3/0214—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L5/00—Manufacture of veneer ; Preparatory processing therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/30—Fireproofing
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a plywood processing technology, which belongs to the technical field of plywood processing technologies and comprises the following steps: selecting raw wood which meets the processing requirements; cutting off the log, namely cutting off the log according to the size of a finished plywood; veneer rotary cutting, namely performing veneer rotary cutting on the log by using a rotary cutter; drying, namely putting the veneer after rotary cutting into a dryer for drying treatment, and then cooling at normal temperature to ensure that the water content of the veneer is lower than 5-10%; soaking a flame retardant, namely soaking the dried veneer into a flame retardant solution; drying again, and continuously drying the veneer soaked with the flame retardant; gluing, namely coating an adhesive on the surface of the dried veneer, and then sequentially superposing the veneers to form a plywood; prepressing and hot-pressing, namely prepressing the glued plate blank on a cold press, and then hot-pressing the prepressed plate blank. The invention provides a plywood processing technology which has the characteristics of good flame retardant effect and low use cost of users.
Description
Technical Field
The invention relates to the technical field of plywood processing, in particular to a plywood processing technology.
Background
Plywood is a three-layer or multi-layer plate material made up by using wood segments and making them be rotary-cut into single board or sliced into thin wood and using adhesive to make them be glued together, and usually using odd number of layers of single board and making the fibre directions of adjacent layers of single board be mutually perpendicular.
With the development of the home industry, the requirements of people on wooden furniture are higher and higher, however, after the existing wooden furniture is used for a long time, the phenomena of aging, cracking, deformation and the like are easy to occur, so that the service life of the furniture is shortened, and the use cost and the maintenance cost of a user are increased; the existing plywood does not have the flame-retardant characteristic, so that when veneers are glued, one or more layers of flame-retardant plates need to be glued to ensure that the plywood has the flame-retardant effect, but the thickness of the plywood is increased, the weight of the plywood is increased, and even the use cost of the plywood is increased. Therefore, the above defects can be overcome by processing the plywood by a special process during processing.
Disclosure of Invention
The invention mainly aims to provide a plywood processing technology, aiming at solving the problem that the existing plywood has poor flame retardant effect; easy cracking, high use cost for users and the like.
In order to achieve the purpose, the invention provides a plywood processing technology, which comprises the following steps:
s1: selecting raw wood which meets the processing requirements;
s2: cutting off the log, namely cutting off the log according to the size of a finished plywood, wherein the cut-off wood section is the size of the finished plywood plus the machining allowance;
s3: peeling the cut log, and performing veneer rotary cutting on the log by using a rotary cutter;
s4: drying, namely putting the veneer after rotary cutting into a dryer for drying treatment, and cooling at normal temperature after drying is finished to ensure that the water content of the veneer is lower than 5-10%;
s5: soaking the flame retardant, namely soaking the dried veneer in a flame retardant solution for 3-5 hours;
s6: drying again, and continuously drying the veneer soaked with the flame retardant;
s7: gluing, namely coating an adhesive on the surface of the dried veneer, and then sequentially superposing the veneers to form a plywood;
s8: prepressing and hot-pressing, namely prepressing the glued plate blank on a cold press, and then hot-pressing the prepressed plate blank to form the plate blank.
Preferably, in step S1, the raw wood is poplar, eucalyptus, oak, walnut, or pine.
Preferably, in the step S2, the length of the cut wood segment is 1500-3000 mm.
Preferably, in the step S4, the drying includes three stages, a first stage, in which the drying temperature is 35 to 48 ℃, and the drying time is 0.5 to 1 hour; in the second stage, the drying temperature is 52-63 ℃, and the drying time is 1-1.5 h; in the third stage, the drying temperature is 65-76 ℃, and the drying time is 0.5-1 h.
Preferably, in the step S5, the flame retardant is a water-soluble flame retardant, and before soaking the flame retardant, the ammonium polyphosphate and the water are mixed to prepare a solution with a solution concentration of 15% -25%, and after standing for 0.5-1h, the veneer is placed in the solution to be soaked.
Preferably, in the step S7, the adhesive used is phenolic resin glue, and before gluing, the flame retardant is added to the adhesive in an amount of 20% -50% of the phenolic resin glue for sufficient mixing.
Preferably, the coating amount of the adhesive is 40 to 55g/m2。
Preferably, the flame retardant mixed with the phenolic resin glue is magnesium hydroxide or aluminium hydroxide.
Preferably, in the step S8, the pre-pressing time is 0.5 to 1 hour, the pre-pressing pressure is 0.2 to 0.4MPa, the hot-pressing time is 2 to 2.5 hours, the hot-pressing pressure is 0.5 to 0.8MPa, and the hot-pressing temperature is 80 to 120 ℃.
The technical scheme of the invention has the beneficial effects that: the invention relates to a plywood processing technology, which mainly comprises eight processing procedures, namely material selection, log cutting, veneer rotary cutting, drying, fire retardant dipping, drying again, gluing, prepressing and hot pressing; selecting wood with a good appearance, reserving machining allowance and allowance loss when the log is cut off, carrying out rotary cutting on the veneer by using an existing rotary cutter, drying by using a veneer dryer, soaking the veneer in a flame retardant solution for a proper time after drying is finished, drying again, coating an adhesive on the surface of the dried veneer for gluing to form a veneer blank, and finally, prepressing and hot-pressing to form a finished veneer product; the whole processing process is simple, the veneer is dipped in glue, and the flame retardant effect of the plywood is ensured.
Detailed Description
In the following, the embodiments of the present invention will be described in detail and completely, and obviously, the described embodiments are only a part of the embodiments of the present invention, but 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
As a preferred embodiment of the present invention, the present invention provides a plywood processing process, including the steps of:
s1: selecting raw wood which meets the processing requirements and is a wood section cut into a certain length along the length direction of the raw wood strips according to the standard specification or special specification of size, shape and quality. The raw wood is selected mainly from the aspects of cracking and breaking the appearance of the wood or whether wood sections have moths or not.
S2: cutting off the log, namely cutting off the log according to the size of a finished plywood, wherein the cut-off wood section is the size of the finished plywood plus the machining allowance; for example, the size of the finished plywood is 200mm × 200mm, it is necessary to control the length of the log at least to 220mm to 240mm, wherein 20mm to 40mm is the processing margin.
S3: peeling the cut log, and performing veneer rotary cutting on the log by using a rotary cutter; the log is peeled by the existing special peeling machine, so that the peeling efficiency is high, the wood damage is small, and the subsequent processing is convenient; the rotary cutter used in the invention is a large-scale rotary cutter, the rotary cutter is used for processing the cut logs into continuous veneer strips and then forming veneers, the quality and the precision of the veneers are improved, the production efficiency is also improved, the rotary cutter is one of main devices for producing plywood, and the processing precision of the rotary cutter can further influence the precision of the veneers.
S4: drying, namely putting the veneer after rotary cutting into a dryer for drying treatment, and cooling at normal temperature after drying is finished to ensure that the water content of the veneer is lower than 5-10%; the existing veneer dryer is adopted in the dryer, the moisture content of the veneer which is just cut off in a rotary mode is high, and the veneer dryer is mainly used for drying the veneer, so that the moisture content in the veneer is reduced, and the dehydrated veneer meets the requirements of a processing technology. During the drying process the veneer will shrink appropriately, which also needs to be reserved when the logs are cut. After the drying is finished, the veneer needs to be cooled at normal temperature to recover the physical properties of the veneer.
S5: soaking the flame retardant, namely soaking the dried veneer in a flame retardant solution for 3-5 hours; the flame retardant used in the invention is a water-soluble flame-retardant solution mixed with water, the veneer is placed in the flame-retardant solution to be soaked so as to ensure the flame-retardant property of the veneer, the soaking time can also influence the flame-retardant effect of the veneer, and the veneer needs to be dried continuously after being soaked.
S6: drying again, and continuously drying the veneer soaked with the flame retardant; the drying process of the step is also carried out by adopting a veneer dryer, so that the fire retardant can be completely immersed in the veneer, and the fire retardant effect of the veneer is further ensured.
S7: gluing, namely coating an adhesive on the surface of the dried veneer, and then sequentially superposing the veneers to form a plywood; the plywood produced by the invention is composed of five or seven veneers, and when glue is applied, the two surfaces of the veneer of the middle layer need to be coated with the adhesive and need to be uniformly coated, so that each veneer can be uniformly glued, and the bonding effect of the plywood is ensured.
S8: prepressing and hot-pressing, namely prepressing the glued plate blank on a cold press, and then hot-pressing the prepressed plate blank to form the plate blank. After gluing, the plywood is required to be pressed and formed, so that the veneers can be bonded together and are not easy to fall off; the pressing plate forming comprises two procedures: prepressing and hot pressing, wherein the prepressing is to put the glued plywood plate blank on a cold press for pressing, and then to put the prepressed plate blank on a wood plate hot press for hot pressing, the hot-pressed plywood is a finished product, and the hot pressing pressure is proper, so that the gluing effect of the finished product and the outturn percentage of the finished product can be further ensured; and finally, continuing to carry out subsequent edge cutting and sanding processes to ensure that the plywood meets the inspection standard.
The invention relates to a plywood processing technology, which mainly comprises eight processing procedures, namely material selection, log cutting, veneer rotary cutting, drying, fire retardant dipping, drying again, gluing, prepressing and hot pressing; selecting wood with a good appearance, reserving machining allowance and allowance loss when the log is cut off, carrying out rotary cutting on the veneer by using an existing rotary cutter, drying by using a veneer dryer, soaking the veneer in a flame retardant solution for a proper time after drying is finished, drying again, coating an adhesive on the surface of the dried veneer for gluing to form a veneer blank, and finally, prepressing and hot-pressing to form a finished veneer product; the whole processing process is simple, and the veneer is dipped with glue, so that the flame retardant effect of the plywood is ensured.
In step S1, the raw wood is poplar, eucalyptus, oak, walnut, pine, or other wood, which is not described herein.
In the step S2, the length of the intercepted wood segment is 1500-3000mm, and the intercepted wood segment can be cut into multiple sections at one time by adopting an automatic segmented wood cutting machine, so that the intercepting efficiency is high, and full-automatic processing is realized.
In the step S4, the drying comprises three stages, namely a first stage, the drying temperature is 35-48 ℃, and the drying time is 0.5-1 h; in the second stage, the drying temperature is 52-63 ℃, and the drying time is 1-1.5 h; in the third stage, the drying temperature is 65-76 ℃, and the drying time is 0.5-1 h. As trees grow in the nature and contain certain moisture, the wood needs to be dried after being felled, and the wood drying is an important link for ensuring and improving the quality of the wood, reducing the loss of the wood and improving the utilization rate of the wood. The traditional method is to only dry the wood once, and although the process is simple, the drying effect is poor.
In step S5, the fire retardant is water-soluble fire retardant, and before soaking the fire retardant, the ammonium polyphosphate and the water are mixed to prepare a solution with the concentration of 15-25%, and after standing for 0.5-1h, the veneer is placed into the solution to be soaked. Wherein, the ammonium polyphosphate can also be replaced by other flame retardants.
In the step S7, the used adhesive is phenolic resin glue, before gluing, a flame retardant is added into the adhesive according to 20% -50% of the phenolic resin glue for full mixing, the flame retardant mixed with the phenolic resin glue is magnesium hydroxide or aluminum hydroxide, the flame retardant used in the step is a powdery flame retardant, and the powdery flame retardant is different from the water-soluble flame retardant in the step S5 and does not influence each other, so that the flame retardant effect of the plywood is further ensured.
In step S7, the coating amount of the adhesive is 40-55g/m2During gluing, the uniformity of the glue on the surface of the veneer is ensured, and the subsequent hot pressing process and the forming of the veneer are not influenced.
In step S8, the pre-pressing time is 0.5-1h, the pre-pressing pressure is 0.2-0.4MPa, the hot-pressing time is 2-2.5h, the hot-pressing pressure is 0.5-0.8MPa, and the hot-pressing temperature is 80-120 ℃.
Example 2
S1: selecting raw wood which meets the processing requirements;
s2: cutting off the log, namely cutting off the log according to the size of a finished plywood, wherein the cut-off wood section is the size of the finished plywood plus the machining allowance;
s3: peeling the cut log, and performing veneer rotary cutting on the log by using a rotary cutter;
s4: drying, namely putting the veneer after rotary cutting into a dryer for drying treatment, and cooling at normal temperature after drying is finished to ensure that the water content of the veneer is lower than 5%;
s5: soaking the flame retardant, namely soaking the dried veneer in a flame retardant solution for 3 hours,
s6: drying again, and continuously drying the veneer soaked with the flame retardant;
s7: gluing, namely coating an adhesive on the surface of the dried veneer, and then sequentially superposing the veneers to form a plywood;
s8: prepressing and hot-pressing, namely prepressing the glued plate blank on a cold press, and then hot-pressing the prepressed plate blank to form the plate blank.
In step S1, the raw wood is poplar, eucalyptus, oak, walnut, pine.
In step S2, the length of the cut wood segment is 1500 mm.
In the step S4, the drying comprises three stages, namely a first stage, the drying temperature is 35 ℃, and the drying time is 0.5 h; in the second stage, the drying temperature is 52 ℃, and the drying time is 1 h; in the third stage, the drying temperature is 65 ℃ and the drying time is 0.5 h.
In the step S5, the fire retardant is water-soluble fire retardant, and before soaking the fire retardant, the ammonium polyphosphate and the water are mixed to prepare a solution with the concentration of 15 percent, and after standing for 0.5h, the veneer is placed into the solution to be soaked.
In step S7, the adhesive used is phenolic resin glue, and before gluing, a flame retardant is added to the adhesive in an amount of 20% of the phenolic resin glue and fully mixed, and the flame retardant mixed with the phenolic resin glue is magnesium hydroxide or aluminum hydroxide.
The coating amount of the adhesive was 40g/m2。
In step S8, the pre-pressing time is 0.5h, the pre-pressing pressure is 0.2MPa, the hot-pressing time is 2h, the hot-pressing pressure is 0.5MPa, and the hot-pressing temperature is 80 ℃.
Example 3
S1: selecting raw wood which meets the processing requirements;
s2: cutting off the log, namely cutting off the log according to the size of a finished plywood, wherein the cut-off wood section is the size of the finished plywood plus the machining allowance;
s3: peeling the cut log, and performing veneer rotary cutting on the log by using a rotary cutter;
s4: drying, namely putting the veneer after rotary cutting into a dryer for drying treatment, and cooling at normal temperature after drying is finished to ensure that the water content of the veneer is lower than 10%;
s5: soaking the flame retardant, namely soaking the dried veneer in a flame retardant solution for 5 hours,
s6: drying again, and continuously drying the veneer soaked with the flame retardant;
s7: gluing, namely coating an adhesive on the surface of the dried veneer, and then sequentially superposing the veneers to form a plywood;
s8: prepressing and hot-pressing, namely prepressing the glued plate blank on a cold press, and then hot-pressing the prepressed plate blank to form the plate blank.
In step S1, the raw wood is poplar, eucalyptus, oak, walnut, pine.
In step S2, the length of the cut wood segment is 3000 mm.
In the step S4, the drying comprises three stages, namely a first stage, the drying temperature is 48 ℃, and the drying time is 1 h; in the second stage, the drying temperature is 63 ℃ and the drying time is 1.5 h; in the third stage, the drying temperature is 76 ℃ and the drying time is 1 h.
In step S5, the fire retardant is water-soluble fire retardant, and before soaking the fire retardant, the ammonium polyphosphate and the water are mixed to prepare a solution with the concentration of 25%, and after standing for 1h, the veneer is placed into the solution to be soaked.
In step S7, the adhesive used is phenolic resin glue, and before gluing, a flame retardant is added to the adhesive in an amount of 50% of the phenolic resin glue and fully mixed, and the flame retardant mixed with the phenolic resin glue is magnesium hydroxide or aluminum hydroxide.
The coating amount of the adhesive was 55g/m2。
In step S8, the pre-pressing time is 1h, the pre-pressing pressure is 0.4MPa, the hot-pressing time is 2.5h, the hot-pressing pressure is 0.8MPa, and the hot-pressing temperature is 120 ℃.
Example 4
S1: selecting raw wood which meets the processing requirements;
s2: cutting off the log, namely cutting off the log according to the size of a finished plywood, wherein the cut-off wood section is the size of the finished plywood plus the machining allowance;
s3: peeling the cut log, and performing veneer rotary cutting on the log by using a rotary cutter;
s4: drying, namely putting the veneer after rotary cutting into a dryer for drying treatment, and cooling at normal temperature after drying is finished to ensure that the water content of the veneer is lower than 5-10%;
s5: soaking the flame retardant, namely soaking the dried veneer in a flame retardant solution for 3-5h,
s6: drying again, and continuously drying the veneer soaked with the flame retardant;
s7: gluing, namely coating an adhesive on the surface of the dried veneer, and then sequentially superposing the veneers to form a plywood;
s8: prepressing and hot-pressing, namely prepressing the glued plate blank on a cold press, and then hot-pressing the prepressed plate blank to form the plate blank.
In step S1, the raw wood is poplar, eucalyptus, oak, walnut, pine.
In step S2, the length of the cut wood segment is 2000 mm.
In the step S4, the drying comprises three stages, namely a first stage, the drying temperature is 40 ℃, and the drying time is 0.8 h; in the second stage, the drying temperature is 56 ℃, and the drying time is 1.2 h; in the third stage, the drying temperature is 70 ℃, and the drying time is 0.8 h.
In step S5, the fire retardant is water-soluble fire retardant, and before soaking the fire retardant, the ammonium polyphosphate and the water are mixed to prepare a solution with the concentration of 20%, and after standing for 0.8h, the veneer is placed in the solution to be soaked.
In step S7, the adhesive used is phenolic resin glue, and before gluing, a flame retardant is added to the adhesive in an amount of 35% of the phenolic resin glue and fully mixed, and the flame retardant mixed with the phenolic resin glue is magnesium hydroxide or aluminum hydroxide.
The coating amount of the adhesive was 48g/m2。
In the step S8, the pre-pressing time is 0.8h, the pre-pressing pressure is 0.3MPa, the hot-pressing time is 2.2h, the hot-pressing pressure is 0.7MPa, and the hot-pressing temperature is 100 ℃.
The above description is only a part of the preferred embodiment or embodiments of the present invention, and the text should not therefore limit the scope of the present invention, and all the equivalent structural changes made by the content of the present specification or the related technical fields directly/indirectly using the content of the present specification are included in the scope of the present invention.
Claims (9)
1. A plywood processing technology is characterized by comprising the following steps:
s1: selecting raw wood which meets the processing requirements;
s2: cutting off the log, namely cutting off the log according to the size of a finished plywood, wherein the cut-off wood section is the size of the finished plywood plus the machining allowance;
s3: peeling the cut log, and performing veneer rotary cutting on the log by using a rotary cutter;
s4: drying, namely putting the veneer after rotary cutting into a dryer for drying treatment, and cooling at normal temperature after drying is finished to ensure that the water content of the veneer is lower than 5-10%;
s5: soaking the flame retardant, namely soaking the dried veneer in a flame retardant solution for 3-5 hours;
s6: drying again, and continuously drying the veneer soaked with the flame retardant;
s7: gluing, namely coating an adhesive on the surface of the dried veneer, and then sequentially superposing the veneers to form a plywood;
s8: prepressing and hot-pressing, namely prepressing the glued plate blank on a cold press, and then hot-pressing the prepressed plate blank to form the plate blank.
2. Plywood processing technology according to claim 1, characterized in that: in the step S1, the raw wood is poplar, eucalyptus, oak, walnut, pine.
3. Plywood processing technology according to claim 1, characterized in that: in the step S2, the length of the cut wood segment is 1500-3000 mm.
4. Plywood processing technology according to claim 1, characterized in that: in the step S4, the drying comprises three stages, namely a first stage, the drying temperature is 35-48 ℃, and the drying time is 0.5-1 h; in the second stage, the drying temperature is 52-63 ℃, and the drying time is 1-1.5 h; in the third stage, the drying temperature is 65-76 ℃, and the drying time is 0.5-1 h.
5. Plywood processing technology according to claim 1, characterized in that: in the step S5, the fire retardant is water-soluble fire retardant, before soaking the fire retardant, the ammonium polyphosphate and the water are mixed to prepare a solution with the concentration of 15-25%, and after standing for 0.5-1h, the veneer is placed into the solution to be soaked.
6. Plywood processing technology according to claim 1, characterized in that: in the step S7, the used adhesive is phenolic resin glue, and before gluing, the flame retardant is added into the adhesive according to 20-50% of the phenolic resin glue for fully mixing.
7. The plywood processing process of claim 6, wherein: the coating amount of the adhesive is 40-55g/m 2.
8. The plywood processing process of claim 6, wherein: the flame retardant mixed with the phenolic resin glue is magnesium hydroxide or aluminum hydroxide.
9. Plywood processing technology according to claim 1, characterized in that: in the step S8, the pre-pressing time is 0.5-1h, the pre-pressing pressure is 0.2-0.4MPa, the hot-pressing time is 2-2.5h, the hot-pressing pressure is 0.5-0.8MPa, and the hot-pressing temperature is 80-120 ℃.
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| CN202110563461.XA CN113290657A (en) | 2021-05-21 | 2021-05-21 | Plywood processing technology |
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| CN202110563461.XA CN113290657A (en) | 2021-05-21 | 2021-05-21 | Plywood processing technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114311196A (en) * | 2022-01-05 | 2022-04-12 | 仁化县奥达胶合板有限公司 | Fire-fighting plywood and manufacturing process thereof |
| CN115179373A (en) * | 2022-06-22 | 2022-10-14 | 周美君 | Preparation method of polyurethane plywood |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792578A (en) * | 2005-10-26 | 2006-06-28 | 哈尔滨市香坊区人造板胶粘剂研究所 | Method for producing plywood with glueing on one side and plywood mould |
| CN102554981A (en) * | 2012-01-09 | 2012-07-11 | 浙江升华云峰新材股份有限公司 | Method for manufacturing flame-retardant core-board |
| CN105479557A (en) * | 2015-11-23 | 2016-04-13 | 安徽国泰印务有限公司 | Processing technology of flame-retardant plywood |
| CN107984560A (en) * | 2017-11-29 | 2018-05-04 | 黄桂凤 | A kind of preparation method of flame-retardant plywood |
| CN112549216A (en) * | 2020-12-04 | 2021-03-26 | 南京林业大学 | Preparation method of flame-retardant plywood |
-
2021
- 2021-05-21 CN CN202110563461.XA patent/CN113290657A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792578A (en) * | 2005-10-26 | 2006-06-28 | 哈尔滨市香坊区人造板胶粘剂研究所 | Method for producing plywood with glueing on one side and plywood mould |
| CN102554981A (en) * | 2012-01-09 | 2012-07-11 | 浙江升华云峰新材股份有限公司 | Method for manufacturing flame-retardant core-board |
| CN105479557A (en) * | 2015-11-23 | 2016-04-13 | 安徽国泰印务有限公司 | Processing technology of flame-retardant plywood |
| CN107984560A (en) * | 2017-11-29 | 2018-05-04 | 黄桂凤 | A kind of preparation method of flame-retardant plywood |
| CN112549216A (en) * | 2020-12-04 | 2021-03-26 | 南京林业大学 | Preparation method of flame-retardant plywood |
Non-Patent Citations (2)
| Title |
|---|
| 唐忠荣编著: "《人造板制造学(上册)》", 31 March 2015, 科学出版社 * |
| 杨杨等: "《土木工程材料》", 31 July 2018, 武汉大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114311196A (en) * | 2022-01-05 | 2022-04-12 | 仁化县奥达胶合板有限公司 | Fire-fighting plywood and manufacturing process thereof |
| CN115179373A (en) * | 2022-06-22 | 2022-10-14 | 周美君 | Preparation method of polyurethane plywood |
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