CN113601628A - Process for producing plywood by using small crushed veneers - Google Patents
Process for producing plywood by using small crushed veneers Download PDFInfo
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- CN113601628A CN113601628A CN202110750536.5A CN202110750536A CN113601628A CN 113601628 A CN113601628 A CN 113601628A CN 202110750536 A CN202110750536 A CN 202110750536A CN 113601628 A CN113601628 A CN 113601628A
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- plywood
- wood
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- filling
- drying
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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
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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
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G1/00—Machines or devices for removing knots or other irregularities or for filling-up holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/06—Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to the technical field of plywood production, in particular to a process for producing plywood by using small crushed veneers, which comprises the following steps of 1, material preparation; step 2, gluing; step 3, extruding and drying; step 4, finishing the plate; step 5, glue supplementing; step 6, filling gaps; step 7, high-pressure curing; and 8, adjusting corners. The gaps of the plywood are filled with the synthetic epoxy resin filler, so that compared with gypsum filling, the quality of the plywood is improved, the condition of subsequent cracking of the plywood is avoided, the nail feeding effect of the plywood is improved, compared with the condition that residues are not dropped after putty cutting, the durability of the plywood is improved, the device carries out high-pressure bubble removal on the filler after gluing after the gaps are filled, the tightness of subsequent gluing of the plywood is facilitated, the device is low-temperature bonding, is similar to shade drying, does not carry out ultrahigh-temperature treatment on the filler, is beneficial to maintaining the viscosity of glue, shortens the manufacturing time and is beneficial to the production efficiency.
Description
Technical Field
The invention relates to the technical field of plywood production, in particular to a process for producing plywood by using small crushed veneers.
Background
The waste material of small single board is used to produce plywood, which is three-layer or multi-layer plate material made up by rotary cutting wood into single board or planing wood into thin wood and gluing them with adhesive.
Chinese patent discloses a plywood's production technology, (grant publication No. CN 106182220A), this patent technology pre-compaction hot pressing time is short, the production speed is fast, the internal stress is little, be difficult to open glue and warp, the gluing agent has thermosetting good, viscosity is high, high strength, the endurance is good, be difficult to rotten advantage, however, the putty that fills on above-mentioned device and the market generally fills up for the gypsum, fall the sediment easily after the cutting, be unfavorable for the incorruptibility of panel, generally after the rubberizing, do not handle it, lead to gluey interior bubble more, be unfavorable for the anchorage of subsequent panel veneer, in the above-mentioned device through many times hot pressing, it is long when having increased the preparation, be unfavorable for production efficiency. Accordingly, one skilled in the art provides a process for producing plywood using shredded veneers to address the problems set forth in the background above.
Disclosure of Invention
The invention aims to provide a process for producing plywood by using small crushed veneers, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a process for producing plywood by using small crushed veneers comprises the following process steps:
step 1, material preparation: peeling raw wood, cutting the raw wood into wood chips, drying the wood chips in the sun, grinding the collected small single boards to be consistent in thickness, removing wood chips on the materials, softening and flattening the boards, and cutting the upper panel and the lower panel into required sizes;
step 2, gluing: arranging the trimmed small single plates on the upper surface of the lower panel by using an adhesive, extruding and pre-solidifying the small single plates, then applying the adhesive on the small single plates adhered to the lower panel, and extruding the lower surface of the upper panel to the upper surfaces of the small single plates for extruding and pre-solidifying;
step 3, extruding and drying: orderly placing the glued plywood, stacking the plywood through a separation frame, pressurizing, and placing the plywood in a drying room for drying treatment;
step 4, plate finishing: trimming and forming the extruded and dried board to obtain a regular plywood, polishing the corners of the board, polishing the upper and lower surface layers of the wood, and removing wood chips;
step 5, glue supplementing: uniformly supplementing adhesive along two sides of the wood chips;
step 6, filling gaps: sealing the other three edges of the plate by using a sealing adhesive tape, filling the prepared filler in holes, cracks and gaps on the plate, leveling, stripping the outer side of the plate at the positions of glue opening and bubbling, filling putty and leveling;
step 7, high-pressure curing: filling the glued board subjected to gap filling into a high-pressure chamber for high pressure, wherein the temperature in the high-pressure chamber is kept at 60-80 ℃, the pressure is 20-32 MPa, the time is controlled to be 60-80 minutes, keeping the side, which is not subjected to edge sealing, of the board in the high-pressure chamber vertically upwards, and arranging and extruding and fixing the board through a partition frame;
step 8, corner adjustment: and taking out the plywood cured under high pressure, removing the adhesive tapes on the edges of the plywood, polishing the corners of the plywood, and sleeving plastic corner protectors on the four corners of the plywood as required to package bags.
As a further scheme of the invention: in the step 1, the softening of the wood is carried out by detecting the water content of the wood, such as 30% -50% of the water content of the wood, directly heating and softening, such as the water content of the wood is less than 30%, humidifying and heating for softening, such as the water content of the wood is more than 50%, drying the wood to reach the water content of 30% -50%, and heating for softening.
As a still further scheme of the invention: the filler in the step 6 is composed of epoxy resin, chemical fiber silk wadding, a fire retardant, 4-diamino diphenyl sulfone and camphor wood chips, wherein the epoxy resin is 40%, the chemical fiber silk wadding is 30%, the fire retardant is 5%, the 4, 4-diamino diphenyl sulfone is 5%, and the camphor wood chips are 20%.
Compared with the prior art, the invention has the beneficial effects that: the gaps of the plywood are filled with the synthetic epoxy resin filler, so that compared with gypsum filling, the quality of the plywood is improved, the condition that the subsequent cracks are formed in the plywood is avoided, the nail feeding effect of the plywood is improved, the problem that the degree of nail biting is low and slipping is caused by putty is solved, compared with putty cutting, slag is not dropped, the durability of the plywood is improved, after the cracks are formed, the filler is subjected to high-pressure bubble removal after gluing, the subsequent tightness of board gluing is facilitated, the low-temperature gluing device is similar to shade drying, ultrahigh-temperature treatment is not performed, the stickiness of the glue is favorably maintained, the manufacturing time is shortened, and the production efficiency is facilitated.
Drawings
FIG. 1 is a flow diagram of a process for producing plywood from shredded veneers.
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.
Referring to fig. 1, in an embodiment of the present invention, a process for producing plywood by using crushed small veneers includes the following steps:
example one
Step 1, material preparation: peeling raw wood, cutting the raw wood into wood chips, drying the wood chips in the sun, grinding the collected small single boards to be consistent in thickness, removing wood chips on the materials, softening and flattening the boards, and cutting the upper panel and the lower panel into required sizes;
step 2, gluing: arranging the trimmed small single plates on the upper surface of the lower panel by using an adhesive, extruding and pre-solidifying the small single plates, then applying the adhesive on the small single plates adhered to the lower panel, and extruding the lower surface of the upper panel to the upper surfaces of the small single plates for extruding and pre-solidifying;
step 3, extruding and drying: orderly placing the glued plywood, stacking the plywood through a separation frame, pressurizing, and placing the plywood in a drying room for drying treatment;
step 4, plate finishing: trimming and forming the extruded and dried board to obtain a regular plywood, polishing the corners of the board, polishing the upper and lower surface layers of the wood, and removing wood chips;
step 5, glue supplementing: uniformly supplementing adhesive along two sides of the wood chips;
step 6, filling gaps: sealing the other three edges of the plate by using a sealing adhesive tape, filling the prepared filler in holes, cracks and gaps on the plate, leveling, stripping the outer side of the plate at the positions of glue opening and bubbling, filling putty and leveling;
step 7, high-pressure curing: filling the glued board which is subjected to gap filling into a high-pressure chamber for high pressure, wherein the temperature in the high-pressure chamber is kept at 60 ℃, the pressure is 20MPa, the time is controlled to be 60 minutes, keeping the side, which is not sealed, of the board in the high-pressure chamber vertically upwards, and arranging and extruding and fixing the board through a separation frame;
step 8, corner adjustment: and taking out the plywood cured under high pressure, removing the adhesive tapes on the edges of the plywood, polishing the corners of the plywood, and sleeving plastic corner protectors on the four corners of the plywood as required to package bags.
Example two
Step 1, material preparation: peeling raw wood, cutting the raw wood into wood chips, drying the wood chips in the sun, grinding the collected small single boards to be consistent in thickness, removing wood chips on the materials, softening and flattening the boards, and cutting the upper panel and the lower panel into required sizes;
step 2, gluing: arranging the trimmed small single plates on the upper surface of the lower panel by using an adhesive, extruding and pre-solidifying the small single plates, then applying the adhesive on the small single plates adhered to the lower panel, and extruding the lower surface of the upper panel to the upper surfaces of the small single plates for extruding and pre-solidifying;
step 3, extruding and drying: orderly placing the glued plywood, stacking the plywood through a separation frame, pressurizing, and placing the plywood in a drying room for drying treatment;
step 4, plate finishing: trimming and forming the extruded and dried board to obtain a regular plywood, polishing the corners of the board, polishing the upper and lower surface layers of the wood, and removing wood chips;
step 5, glue supplementing: uniformly supplementing adhesive along two sides of the wood chips;
step 6, filling gaps: sealing the other three edges of the plate by using a sealing adhesive tape, filling the prepared filler in holes, cracks and gaps on the plate, leveling, stripping the outer side of the plate at the positions of glue opening and bubbling, filling putty and leveling;
step 7, high-pressure curing: filling the glued board which is subjected to gap filling into a high-pressure chamber for high pressure, wherein the temperature in the high-pressure chamber is kept at 80 ℃, the pressure is 32MPa, the time is controlled to be 80 minutes, keeping the side, which is not sealed, of the board to be vertically upward in the high-pressure chamber, and arranging and extruding and fixing the board through a separation frame;
step 8, corner adjustment: and taking out the plywood cured under high pressure, removing the adhesive tapes on the edges of the plywood, polishing the corners of the plywood, and sleeving plastic corner protectors on the four corners of the plywood as required to package bags.
Further: in the step 1, firstly, the water content of the wood is detected, if the water content of the wood is 30-50%, the wood is directly heated and softened, if the water content of the wood is less than 30%, the wood is humidified and heated and softened, if the water content of the wood is more than 50%, the wood is dried and treated to have the water content of 30-50%, and the wood is heated and softened, in the step 6, the filler is composed of epoxy resin, chemical fiber silk wadding, a fire retardant, 4-diaminodiphenyl sulfone and camphor wood chips, wherein the epoxy resin is 40%, the chemical fiber silk wadding is 30%, the fire retardant is 5%, the 4, 4-diaminodiphenyl sulfone is 5%, and the camphor wood chips are 20%.
Softening test of the materials
| Water content before softening | Humidification humidity | Temperature of heating | Water content after adjustment | Water content after softening |
| ＜30％ | 30％ | 120° | 30％ | 10％ |
| 30％ | 0％ | 120° | 30％ | 10％ |
| 40％ | 0％ | 120° | 40％ | 15％ |
| 50％ | 0％ | 120° | 50％ | 20％ |
| ＞30％ | -30％ | 120° | 30％ | 10％ |
Test of filler ratio of Table II
| 1 | 2 | 3 | |
| Epoxy resin | 40％ | 30％ | 20％ |
| Chemical fiber silk wadding | 30％ | 35％ | 40％ |
| Refractory agent | 5％ | 5％ | 5％ |
| 4, 4-diaminodiphenyl sulfone | 5％ | 5％ | 5％ |
| Cinnamomum camphora wood flour | 20％ | 25％ | 30％ |
Parameter testing of the materials of table III
| Hardness of | Preventing moth-eating | Maximum temperature limit | Interval of curing time | |
| 1 | 4501n | 95％ | 430° | 80min |
| 2 | 3851n | 97％ | 378° | 60min |
| 3 | 2640n | 99％ | 325° | 40min |
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. A process for producing plywood by using small crushed veneers is characterized by comprising the following process steps:
step 1, material preparation: peeling raw wood, cutting the raw wood into wood chips, drying the wood chips in the sun, grinding the collected small single boards to be consistent in thickness, removing wood chips on the materials, softening and flattening the boards, and cutting the upper panel and the lower panel into required sizes;
step 2, gluing: arranging the trimmed small single plates on the upper surface of the lower panel by using an adhesive, extruding and pre-solidifying the small single plates, then applying the adhesive on the small single plates adhered to the lower panel, and extruding the lower surface of the upper panel to the upper surfaces of the small single plates for extruding and pre-solidifying;
step 3, extruding and drying: orderly placing the glued plywood, stacking the plywood through a separation frame, pressurizing, and placing the plywood in a drying room for drying treatment;
step 4, plate finishing: trimming and forming the extruded and dried board to obtain a regular plywood, polishing the corners of the board, polishing the upper and lower surface layers of the wood, and removing wood chips;
step 5, glue supplementing: uniformly supplementing adhesive along two sides of the wood chips;
step 6, filling gaps: sealing the other three edges of the plate by using a sealing adhesive tape, filling the prepared filler in holes, cracks and gaps on the plate, leveling, stripping the outer side of the plate at the positions of glue opening and bubbling, filling putty and leveling;
step 7, high-pressure curing: filling the glued board subjected to gap filling into a high-pressure chamber for high pressure, wherein the temperature in the high-pressure chamber is kept at 60-80 ℃, the pressure is 20-32 MPa, the time is controlled to be 60-80 minutes, keeping the side, which is not subjected to edge sealing, of the board in the high-pressure chamber vertically upwards, and arranging and extruding and fixing the board through a partition frame;
step 8, corner adjustment: and taking out the plywood cured under high pressure, removing the adhesive tapes on the edges of the plywood, polishing the corners of the plywood, and sleeving plastic corner protectors on the four corners of the plywood as required to package bags.
2. The process for producing plywood according to claim 1, wherein the softening of the wood in step 1 is performed by detecting the moisture content of the wood, such as 30-50% of the moisture content of the wood, directly heating for softening, such as less than 30% of the moisture content of the wood, humidifying for softening, such as more than 50% of the moisture content of the wood, drying the wood to 30-50% of the moisture content, and heating for softening.
3. The process for manufacturing plywood according to claim 1, wherein in step 6, the filler is composed of epoxy resin, chemical fiber batting, fire-resistant agent, 4-diaminodiphenyl sulfone, and camphorwood chips, and the epoxy resin is 40%, the chemical fiber batting is 30%, the fire-resistant agent is 5%, the 4, 4-diaminodiphenyl sulfone is 5%, and the camphorwood chips are 20%.
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| CN202110750536.5A CN113601628A (en) | 2021-07-02 | 2021-07-02 | Process for producing plywood by using small crushed veneers |
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| CN202110750536.5A CN113601628A (en) | 2021-07-02 | 2021-07-02 | Process for producing plywood by using small crushed veneers |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56106853A (en) * | 1980-01-30 | 1981-08-25 | Noda Plywood Mfg Co Ltd | Pannel for building and manufacture thereof |
| US4541880A (en) * | 1983-09-09 | 1985-09-17 | Crown Forest Industries Limited | Method of making overlaid plywood |
| CN102490219A (en) * | 2011-12-07 | 2012-06-13 | 东北林业大学 | Method for preparing strengthened poplar composite material |
| CN104942912A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for processing high-performance environment-friendly eucalyptus plywood |
| CN106042085A (en) * | 2016-07-21 | 2016-10-26 | 和县薛氏木制品制造有限公司 | Production technology of high-temperature-resistant plywood |
| CN106182220A (en) * | 2016-07-21 | 2016-12-07 | 和县薛氏木制品制造有限公司 | A kind of production technology of plywood |
| CN108858592A (en) * | 2018-07-03 | 2018-11-23 | 临沂市华源经贸有限公司 | The cycle production process of timber leftover bits and pieces production Europe deals |
| CN108908558A (en) * | 2018-07-05 | 2018-11-30 | 广州厚邦木业制造有限公司 | A kind of solid wooden compound floor dash board method for repairing and mending |
| CN110126056A (en) * | 2019-04-29 | 2019-08-16 | 李珂 | A kind of manufacture craft of fireproof medium-density fiberboard |
| CN112405735A (en) * | 2019-08-21 | 2021-02-26 | 庆镒机械实业有限公司 | Automatic board splicing board repairing method with diversified functions and equipment thereof |
-
2021
- 2021-07-02 CN CN202110750536.5A patent/CN113601628A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56106853A (en) * | 1980-01-30 | 1981-08-25 | Noda Plywood Mfg Co Ltd | Pannel for building and manufacture thereof |
| US4541880A (en) * | 1983-09-09 | 1985-09-17 | Crown Forest Industries Limited | Method of making overlaid plywood |
| CN102490219A (en) * | 2011-12-07 | 2012-06-13 | 东北林业大学 | Method for preparing strengthened poplar composite material |
| CN104942912A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for processing high-performance environment-friendly eucalyptus plywood |
| CN106042085A (en) * | 2016-07-21 | 2016-10-26 | 和县薛氏木制品制造有限公司 | Production technology of high-temperature-resistant plywood |
| CN106182220A (en) * | 2016-07-21 | 2016-12-07 | 和县薛氏木制品制造有限公司 | A kind of production technology of plywood |
| CN108858592A (en) * | 2018-07-03 | 2018-11-23 | 临沂市华源经贸有限公司 | The cycle production process of timber leftover bits and pieces production Europe deals |
| CN108908558A (en) * | 2018-07-05 | 2018-11-30 | 广州厚邦木业制造有限公司 | A kind of solid wooden compound floor dash board method for repairing and mending |
| CN110126056A (en) * | 2019-04-29 | 2019-08-16 | 李珂 | A kind of manufacture craft of fireproof medium-density fiberboard |
| CN112405735A (en) * | 2019-08-21 | 2021-02-26 | 庆镒机械实业有限公司 | Automatic board splicing board repairing method with diversified functions and equipment thereof |
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| Title |
|---|
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