CN1057723C - High strength electrical laminated wood and its preparing method - Google Patents
High strength electrical laminated wood and its preparing method Download PDFInfo
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- CN1057723C CN1057723C CN96111702A CN96111702A CN1057723C CN 1057723 C CN1057723 C CN 1057723C CN 96111702 A CN96111702 A CN 96111702A CN 96111702 A CN96111702 A CN 96111702A CN 1057723 C CN1057723 C CN 1057723C
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- veneer
- laminated wood
- wood
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- Laminated Bodies (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The present invention provides a high-strength electric laminated wood and a technical method thereof. The high-strength electrical laminated wood formed by superposing, assembling and pressing a plurality of single boards 2 coated with low medium loss adhesive 1 according to vertical and horizontal stagger wood grains through the technical processes of raw wood finishing, steam boiling, rotary cutting, drying finishing, single board gluing and drying, the hot press of membrane assembly blanks, etc. The laminated wood has the advantages of good mechanical property, good electric property, good appearance quality and high insulating property. Under the function of external force and a strong electric field, the laminated wood can not be broken or penetrated by impact, and can be used on a transformer and a mutual inductor with more than 220KV.
Description
The present invention relates to a kind of electrical laminated wood and preparation method thereof, particularly a kind of preparation method of high strength electrical laminated wood with and products thereof.
Electrical laminated wood is a kind of insulating materials that possesses better mechanical performance and good electrical performance, alternative or steel construction piece and insulation system spares such as epoxy fabric swatch and epoxy cardboard in instead of transformers and the transformer partly, to reduce the volume of transformer, transformer, reduce its cost, therefore more and more adopted by transformer production producer.Because prior art is in addition comprehensive on the basis of plywood production technology and thermoset layer stampings (as insulating materials) production technology, therefore (density is 0.75--0.85g/cm to the electrical laminated wood of producing with prior art because of density is big inadequately
2), caused the mechanical strength and the electric property of electrical laminated wood not ideal enough, in use once produced fracture, cracking and dielectric loss height, phenomenon such as breakdown, so can only on the transformer of 110KV electric pressure, use, and can not on the transformer of 220KV and above electric pressure thereof, use, otherwise will cause fracture and breakdown, directly influence the work of transformer and damage transformer, cause power supply to pause, therefore, anxious high strength electrical laminated wood and the production technology thereof treated during industrial production is used.
The object of the present invention is to provide this kind to produce the process of high strength electrical laminated wood.
Another object of the present invention is to provide the high strength electrical laminated wood that goes out with this explained hereafter product, to satisfy the needs of voltage levels transformer.
Concrete technical scheme of the present invention is that it comprises following technical process:
1, the above Birch of diameter 40cm is selected in log arrangement for use, downy cherry fruit, or other neutral hard wood is truncated into juggle by the finished product specification requirement;
2, boiling, juggle removes silt particle with clear water immersion peeling after 48 hours, and the intensification boiling is to 90--100 ℃, and programming rate is 3-5 ℃/hour, is cooled to 80 ℃ naturally, is incubated 24-36 hour;
3, rotary-cut, 0.5--1.8mm is peeled into veneer by veneer thickness;
4, dry arrangement, under 100-130 ℃ of temperature steam drying 15-20 minute, remove scar joint and rotten part, be spliced into the veneer of certain specification after the repairing;
It is characterized in that adopting 410 epoxy phenolics as adhesive, pass through following technical process again:
5, veneer gluing drying, through the veneer of arrangement, long and short central layer is all by 220--300g/m
2The even gluing of glue-spread, under 60-80 ℃ of temperature, make its dry 15-20 minute, the control volatile content is at 1-2% (percentage by weight), in this process baking temperature cross low or drying time too short, it is few that volatile matter is reduced, the finished product dielectric loss increases, influence the mechanical performance and the electric property of laminate, even cause waste product by existing " blowing out " layering, if but baking temperature is too high or drying time is long, and easily cause adhesive to give to solidify and can't bond;
6, barrier film assembly hot pressing, between slab and backing plate, adopt high-temperature resistant membrane, as polypropylene or polyester film, slab and backing plate are separated, be used to prevent that impurity on the backing plate to the pollution of lamination wood surface, improving the finished product presentation quality, increase creep age distance, guarantee the good insulation performance of product, carry out assembly by the compression ratio of 20-25%, and carry out the hot pressing plywood by the following stage:
Give hot phase temperature 70-80 ℃ of unit pressure 25kg/cm
2
Time 1 minute/mm (finished product thickness)
120-130 ℃ of unit pressure 60kg/cm of hot pressing phase temperature
2
Time 3 minutes/mm (finished product thickness)
The cooling stage steam off, cooling is 1-2 hour naturally, and logical cold water cooling is after 2-5 hour, and slowly plate is unloaded in decompression;
7, handle eventually, the semi-finished product after the hot pressing are sawed the limit behind 36-48 hour natural cooling and shaping, fill a vacancy, and processing such as sanding surface promptly get the high strength electrical laminated wood finished product.
The high strength electrical laminated wood that makes with the present invention's process, form by the crisscross stacked assembly compacting of the several layers veneer 2 that scribbles low dielectric loss binding agent 1 by wood grain, it is characterized in that every layer of veneer thickness is 0.5--1.8mm, and every layer of veneer flushed mutually or docked by the polylith veneer and form, and perhaps connects by 30 °-45 hypotenuse tower mutually to form.Be used to guarantee that thickness is even, make product density even, improve the mechanical performance and the electric property of this lamination wood.
Process of the present invention compared with prior art has following advantage: because process of the present invention adopts the 0.5--1.8mm veneer thickness, the length central layer is all wanted gluing and is carried out dry hot repressing moulding, therefore both improved the Veneer Cutting quality, reduce the veneer dorsal fissure, improved the veneer spread again, and volatile matter is reduced, thereby the mechanical performance and the electric property of lamination wood finished product have greatly been improved, adopt high-temperature resistant membrane that slab and backing plate are separated in addition, reducing or eliminating the pollution of impurity to the plate face, when improving the product appearance quality, strengthen the insulating properties of this lamination wood; High strength lamination wood provided by the invention in addition, because adopting thickness is the veneer of 0.5-1.8mm, and the connection of every layer of veneer employing flushes or 30 °-45 hypotenuse tower connects, therefore eliminate the density variation that uneven thickness brings, make product under the effect that is subjected to external force and forceful electric power field boundary, fracture can not appear, can be not breakdown yet, therefore can be used for the above transformer of 220KV, enlarge the scope of application of product, and provide high-performance high-quality excellent product, thereby realized purpose of the present invention to industrial production.
Fig. 1 is the present invention's high strength electrical laminated wood section of structure.
1 is the low dielectric loss binding agent among the figure, and 2 is the horizontal veneer of wood grain, and 3 is the vertical veneer of wood grain, and 4 are flushing between veneer, and 5 connect for the hypotenuse tower between veneer.
Embodiment:
A, the southwestern birch of employing are raw material, and its diameter is the finished product requirement of 244 * 122cm by breadth more than 40cm, and raw material is blocked the long juggle into 260cm;
B, juggle is put into clear water soaked 48 hours, pull out, peel off the tree degree, eliminate silt and other impurity, put into clean water again, the heating gradient by 3 ℃/hour is warming up to 90 ℃, is cooled to 80 ℃ naturally, is incubated 24 hours;
C, by the requirement rotary-cut of thickness 0.5--1.8mm;
D, above-mentioned rotary-cut material is put into steam dryer, feed 120 ℃ of steam dryings 20 minutes, make the veneer moisture content be not more than 6%, go scar joint and rotten part after the drying, and repair, be spliced into the veneer of desired specification by two assemblies, Three kinds of hors d'oeuvres or four assembly requirements;
Veneer and length central layer that e, splicing are put in order are all wanted gluing, and the glue kind is 410 epoxy phenolics, and glue-spread is 220g/m
2
F, blanket glued veneer is carried out drying, baking temperature is 65 ℃, and be 15 minutes drying time, measures volatile content afterwards, and the control content range is at 1-2%;
G, after placing resistant to elevated temperatures polypropylene film on the backing plate, the compression ratio by 20% is carried out assembly to veneer, every layer of veneer flushes according to the geomery of single-board materials etc. or 30 ° of-45 ° of hypotenuse towers connect, and adopts following heat pressing process to carry out hot pressing;
Give heat, temperature 70-80 ℃, unit pressure 25kg/cm
2, time 1 minute/mm,
Hot pressing, temperature 120-130 ℃, unit pressure 60kg/cm
2, time 3 minutes/mm,
Steam is cut off in cooling, and cooling is 1--2 hour naturally, water flowing cooling 2--3 hour.
H, lamination wood that hot pressing is good by 244 * 122cm dimension saw limit, repair surface back sanding, at last the check warehouse-in behind 36 hours natural cooling and shapings.
Claims (4)
1, a kind of process of producing high strength electrical laminated wood comprises the log arrangement, boiling, and rotary-cut, technical process such as dry arrangement is characterized in that adopting low dielectric loss resin 410 epoxy phenolics as adhesive, and the following technical process of process:
A, veneer gluing drying, to veneer, long and short central layer is pressed 220-300g/m respectively
2The even gluing of glue-spread, and under 60-80 ℃ of temperature, make its dry 15-20 minute, the control volatile content is at 1-2% (percentage by weight);
B, the hot pressing of barrier film assembly are provided with high-temperature resistant membrane between slab and backing plate, press compression ratio assembly on film of 20-25%, and carry out the hot pressing plywood by following technology: give heat, and temperature 70-80 ℃, unit pressure 25Kg/cm
2, time 1 minute/mm, hot pressing, temperature 120-130 ℃, unit pressure 60Kg/cm
2, time 3 minutes/mm, steam is cut off in cooling, and cooling is 1--2 hour naturally, water flowing cooling 2--3 hour.
2, process according to claim 1 is characterized in that described high-temperature resistant membrane is polypropylene film or polyester film.
3, the high strength electrical laminated wood for preparing according to the described process of claim 1, form by the crisscross stacked assembly compacting of the several layers veneer 2 that scribbles low dielectric loss binding agent 1 by wood grain, it is characterized in that every layer of thick 0.5--1.8mm of veneer, and every layer of veneer connect to (putting down) mutually by the polylith veneer and forms.
4, high strength electrical laminated wood according to claim 3 is characterized in that described every layer of veneer formed by 30 °-45 hypotenuse overlap joint by the polylith veneer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96111702A CN1057723C (en) | 1996-08-09 | 1996-08-09 | High strength electrical laminated wood and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96111702A CN1057723C (en) | 1996-08-09 | 1996-08-09 | High strength electrical laminated wood and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1156080A CN1156080A (en) | 1997-08-06 |
| CN1057723C true CN1057723C (en) | 2000-10-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96111702A Expired - Fee Related CN1057723C (en) | 1996-08-09 | 1996-08-09 | High strength electrical laminated wood and its preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1057723C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394864A (en) * | 2018-04-25 | 2019-11-01 | 康利源科技（天津）股份有限公司 | A kind of production method of electrical laminated wood bakelite rod |
| EP3744492A1 (en) * | 2019-05-29 | 2020-12-02 | Neofor | Method for manufacturing multi-layer solid wood panels |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098759C (en) * | 1997-11-06 | 2003-01-15 | 黑龙江省苇河林业局电工层压木厂 | Technology for producing ring-pressed electric laminated wood |
| CN103909685A (en) * | 2012-12-31 | 2014-07-09 | 湖南广信电工科技股份有限公司 | Adhesive-free supporting insulation part hot press molding process |
| CN108081403A (en) * | 2016-11-23 | 2018-05-29 | 徐州家邦家具有限公司 | A kind of furniture plywood production technology |
| CN107127843A (en) * | 2017-07-12 | 2017-09-05 | 康利源科技（天津）股份有限公司 | The technique that a kind of use beech seeds make electrical laminated plank |
| CN107160522A (en) * | 2017-07-12 | 2017-09-15 | 康利源科技（天津）股份有限公司 | A kind of electrician's veneer shovels the production technology of skin |
| CN107127858A (en) * | 2017-07-12 | 2017-09-05 | 康利源科技（天津）股份有限公司 | A kind of electrician's veneer thin slice production technology |
| CN107186834A (en) * | 2017-07-12 | 2017-09-22 | 康利源科技（天津）股份有限公司 | A kind of hot pressing mitered technique in mitered electrical laminated wood production process |
| CN107359031A (en) * | 2017-07-20 | 2017-11-17 | 许昌绝缘材料研究院有限公司 | A kind of method that electrical laminated plate is made using maple birch material |
| CN110682376A (en) * | 2018-07-04 | 2020-01-14 | 康利源科技（天津）股份有限公司 | Electrical laminated wood structure and production process |
| CN109664379B (en) * | 2019-01-08 | 2021-02-09 | 宁安市安杰木业有限公司 | Pure electrical laminated wood and preparation method thereof |
| CN110238920A (en) * | 2019-06-14 | 2019-09-17 | 耿富杰 | A kind of electrical laminated wood and preparation method thereof changing physical aspect |
| CN112192677A (en) * | 2019-07-08 | 2021-01-08 | 康利源科技（天津）股份有限公司 | Method for manufacturing electrical laminated wood board |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2041065U (en) * | 1988-08-18 | 1989-07-12 | 沈阳变压器厂 | Electrical plywood with low dielectric constant |
| CN2264064Y (en) * | 1996-08-09 | 1997-10-08 | 昆明市木器厂 | High strength electrical laminated wood |
-
1996
- 1996-08-09 CN CN96111702A patent/CN1057723C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2041065U (en) * | 1988-08-18 | 1989-07-12 | 沈阳变压器厂 | Electrical plywood with low dielectric constant |
| CN2264064Y (en) * | 1996-08-09 | 1997-10-08 | 昆明市木器厂 | High strength electrical laminated wood |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394864A (en) * | 2018-04-25 | 2019-11-01 | 康利源科技（天津）股份有限公司 | A kind of production method of electrical laminated wood bakelite rod |
| EP3744492A1 (en) * | 2019-05-29 | 2020-12-02 | Neofor | Method for manufacturing multi-layer solid wood panels |
| FR3096601A1 (en) * | 2019-05-29 | 2020-12-04 | Neofor | Manufacturing process of multi-layered solid wood panels |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1156080A (en) | 1997-08-06 |
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| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 12 of the detailed rules for the implementation of the patent law: 96111702.8 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 96220189.8 utility model patent to be given up, and in the 16 volume of the 43 issue of the new type of communique on the patent right to abandon the announcement. |
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| CF01 | Termination of patent right due to non-payment of annual fee |