JPS634763B2 - - Google Patents
Info
- Publication number
- JPS634763B2 JPS634763B2 JP58189567A JP18956783A JPS634763B2 JP S634763 B2 JPS634763 B2 JP S634763B2 JP 58189567 A JP58189567 A JP 58189567A JP 18956783 A JP18956783 A JP 18956783A JP S634763 B2 JPS634763 B2 JP S634763B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- clamping
- wood
- open end
- jig
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000853 adhesive Substances 0.000 claims description 27
- 230000001070 adhesive effect Effects 0.000 claims description 27
- 239000002023 wood Substances 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 2
- 239000013013 elastic material Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- WNYHOOQHJMHHQW-UHFFFAOYSA-N 1-chloropyrene Chemical compound C1=C2C(Cl)=CC=C(C=C3)C2=C2C3=CC=CC2=C1 WNYHOOQHJMHHQW-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 241000287462 Phalacrocorax carbo Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Veneer Processing And Manufacture Of Plywood (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【発明の詳細な説明】
この発明は、マイクロ波加熱による木材の接着
方法とその圧締治具に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wood bonding method using microwave heating and a pressing jig therefor.
従来接着剤の硬化を促進させる方法として、熱
風・ホツトプレス・赤外線ランプ等による外部加
熱と高周波加熱（工業的には13.56MHの波長の
ものを使う）・マイクロ波加熱（国内では
2450MH、海外では915MH）のいわゆる内部加
熱とがある。このうち高周波加熱は外部電源なし
で被加熱物自体が発熱するため、内部を均一に加
熱でき、且つ接着剤のみを局部的に加熱するの
で、短時間で十分な接着強度が得られるという利
点がある。 Conventional methods for accelerating the curing of adhesives include external heating using hot air, hot presses, infrared lamps, etc., high frequency heating (industrially, those with a wavelength of 13.56 MH are used), and microwave heating (in Japan,
There is so-called internal heating (2450MH, 915MH overseas). Among these, high-frequency heating has the advantage that the heated object itself generates heat without an external power source, so the interior can be heated uniformly, and only the adhesive is locally heated, so sufficient adhesive strength can be obtained in a short time. be.
しかし、この反面つぎのような欠点がある。
２枚の平行板電極の間に加工材を挿入して、高周
波電圧を加えるため、製品の大きさに制限をうけ
る。同調（マツチング）をとるのが非常に面倒
である。木材の含水率が７〜10％になるように
シビアに規制しないと、十分な接着性能が得られ
ない。 However, on the other hand, it has the following drawbacks.
Because the processed material is inserted between two parallel plate electrodes and a high-frequency voltage is applied, there are restrictions on the size of the product. Matching is extremely troublesome. Unless the moisture content of wood is strictly regulated to 7 to 10%, sufficient adhesive performance cannot be obtained.
これに対し、マイクロ波加熱では、製品を入れ
る密閉金属箱（オーブン又はキヤビテイという）
にマイクロ波をマグネトロンから放射するため、
高周波加熱のような一対の電極間に製品を入れる
必要がないので、製品の大きさに規制をうけず、
且つ同調の必要もない。また木材含水率の高低が
接着性能を与える影響も少ない等の利点がある。 In contrast, microwave heating uses a sealed metal box (called an oven or cavity) in which the product is placed.
In order to emit microwaves from the magnetron,
Since there is no need to place the product between a pair of electrodes like in high-frequency heating, there are no restrictions on product size.
And there is no need for synchronization. It also has the advantage that the adhesive performance is less affected by the moisture content of the wood.
しかし接着木材を圧接する圧接治具として、従
来一般に使われている金属製のものを使用する
と、金属は誘導加熱又は放電するため、治具自体
が急速に加熱される。このため、圧締部分の木材
が焦げてへこむので、押圧力不足となつて十分な
接着性能が得られなくなる。このように従来は圧
締治具に問題があるため、金属治具によるマイク
ロ波照射で接着剤の硬化促進を図ることは行われ
ていない。このため例えば特公昭57−52883号公
報に示されるように接着剤を塗布した単板を単に
積層した状態でマイクロ波照射をして接着剤を溶
融させたのち、上記単板をコールドプレスにより
冷圧縮しているので、工程が２工程に分れるほか
押圧せずにマイクロ波照射をするため、十分な接
着性態がえられない欠点があつた。 However, if a commonly used metal press jig is used for press-welding bonded wood, the metal undergoes induction heating or discharge, which causes the jig itself to heat up rapidly. As a result, the wood at the pressed portion is scorched and dented, resulting in insufficient pressing force and insufficient adhesive performance. As described above, conventional pressure jigs have problems, and therefore, attempts to accelerate the curing of adhesives using microwave irradiation using metal jigs have not been carried out. For this purpose, for example, as shown in Japanese Patent Publication No. 57-52883, veneers coated with adhesive are simply laminated and exposed to microwaves to melt the adhesive, and then the veneers are cooled by cold pressing. Since it is compressed, the process is divided into two steps, and since microwave irradiation is performed without pressing, it has the disadvantage that sufficient adhesiveness cannot be obtained.
この発明は前記の欠点を解消しようとするもの
で、第１発明は接合面に接着剤を塗布した木材同
志を、少くとも挾着部を絶縁性とした圧締治具に
よつて挾着し、この加圧状態でマイクロ波を照射
して接着剤を乾燥硬化させることを特徴とする木
材の接着方法である。第２発明は前記の接着方法
で使用する圧締治具で、一側を開口端とした環状
体で、少くとも開口端の挾着部を絶縁性とし、且
つ開口端を無理に開くとそこに強い挾着部を生ず
る適度の弾性体で形成したことを特徴とする圧締
治具である。以下にその実施例を図面に従つて説
明する。 This invention attempts to solve the above-mentioned drawbacks, and the first invention is to clamp pieces of wood whose joint surfaces are coated with adhesive using a clamping jig whose clamping parts are at least insulated. , is a wood bonding method characterized by drying and curing the adhesive by irradiating it with microwaves in this pressurized state. The second invention is a clamping jig used in the above bonding method, which is an annular body with an open end on one side, and at least the clamping part of the open end is insulated, and when the open end is forcibly opened, This clamping jig is characterized in that it is made of a moderately elastic material that creates a clamping portion that is strong against water. Examples thereof will be described below with reference to the drawings.
実施例 １
第１図に示すように一側に開口端１を設けた環
状体２により圧締治具３を設け、この開口端１に
無理に開いて、接着面アに接着剤を塗布した木片
イ，イを挾む。圧締治具３は誘電損失係数が低
く、且つ適度の弾性があつて、開口端１を無理に
開いて木片イ，イの挾むと木片イ，イを強く挾着
する材質よりなるもの、この実施例ではポリプロ
ピレンの単板を切り出してつくる。しかし材料は
ポリプロピレンに限るものではなく、ポリエチレ
ン・テフロン・アセタール・ポリカーボネイト樹
脂等の熱可塑性樹脂ならいずれでもよい。開口端
１の引張り強度は20Kg／m2。この力で木片イ，イ
を挾着し、そこへ2450MHz、出力1400Wのマイク
ロ波を９秒間照射する。木片イの大きさは、120
mm×25mm×10mmの直方体である。結果は圧締治具
３による挾着面ウ，ウには何らの焦げを生ぜず
に、接着剤は硬化する。接着力（JISK6852ブロ
ツク圧縮 断試験方法による）は112Kg／m2とな
る。Example 1 As shown in Fig. 1, a clamping jig 3 was provided using an annular body 2 with an open end 1 on one side, the open end 1 was forced open, and adhesive was applied to the adhesive surface A. Hold the pieces of wood A and A together. The clamping jig 3 is made of a material that has a low dielectric loss coefficient, has appropriate elasticity, and can firmly clamp the wooden pieces A and A when the open end 1 is forced open and the wooden pieces A and A are clamped together. In this example, it is made by cutting out a polypropylene veneer. However, the material is not limited to polypropylene, and any thermoplastic resin such as polyethylene, Teflon, acetal, polycarbonate resin, etc. may be used. The tensile strength of the open end 1 is 20Kg/m 2 . Using this force, the wooden pieces A and A are clamped together and microwaves of 2450 MHz and 1400 W output are irradiated onto them for 9 seconds. The size of a piece of wood is 120
It is a rectangular parallelepiped with dimensions of mm x 25 mm x 10 mm. As a result, the adhesive hardens without causing any scorching on the clamping surfaces U and C by the clamping jig 3. Adhesive strength (according to JISK6852 block compression test method) is 112Kg/ m2 .
実施例 ２
第２図に示すような鉄製の環状体４で圧締治具
５をつくる。圧締治具５の両開口端にFRP製の
挾着部６，６を設け、この挾着部６，６を介して
木片イ，イを挾着する。この状態で実施例１と同
様にマイクロ波を照射する。挾着面ウ，ウには焦
げを生せず、接着剤は瞬間的に硬化する。接着力
は120Kg／m2。Example 2 A clamping jig 5 is made from an annular body 4 made of iron as shown in FIG. Clamping parts 6, 6 made of FRP are provided at both open ends of the clamping jig 5, and the pieces of wood A and A are clamped through the clamping parts 6, 6. In this state, microwaves are irradiated in the same manner as in Example 1. There is no charring on the clamping surfaces (U) and (U), and the adhesive hardens instantly. Adhesive strength is 120Kg/m 2 .
実施例 ３
実施例２と同じ圧締治具５を使うが、ここでは
FRP製の挾着部６，６を設けず、直接木片イ，
イを挾着してマイクロ波を照射する。挾着面ウ，
ウに焦げが発生。このため圧締力が減じ、接着力
は54Kg／m2と大きく後退した。また接着層剥離も
生じた。Example 3 The same clamping jig 5 as in Example 2 is used, but here
Without installing the FRP clamping parts 6, 6, the wooden pieces can be directly installed.
Clamp the paper and irradiate it with microwaves. Clamping surface U,
Charring occurred on the cormorant. As a result, the clamping force decreased and the adhesive strength significantly decreased to 54Kg/m 2 . In addition, peeling of the adhesive layer also occurred.
実施例 ４
第３図に示すように20mm角長さ1400mmの試験片
エ，エの木口を45度に切つて留め接合し、これを
前記と同様酸硬化型酢ビ接着剤で接着したのち、
７秒間マイクロ波（2450MHz、1400W）を照射。
結果として30Kg／m2の接着力を得た。しかし同様
の試験片にクロロピレンゴム系接着剤を分離塗布
したときの接着力は１Kg／m2、HBプライマー分
離塗布法では４Kg／m2、酢ビエマルジヨン＋ユリ
ヤ樹脂の分離塗布法では７Kg／m2、ホツトメルト
接着剤では18Kg／m2。このようにマイクロ波照射
をしないときの接着力は非常に小さいものとなつ
た。Example 4 As shown in Figure 3, the ends of test specimens E and E, each 20 mm square and 1400 mm long, were cut at 45 degrees and fastened together, and then glued together with an acid-curing vinyl acetate adhesive in the same manner as above.
Irradiate with microwave (2450MHz, 1400W) for 7 seconds.
As a result, an adhesive strength of 30Kg/m 2 was obtained. However, when chloropyrene rubber adhesive was separately applied to a similar test piece, the adhesive force was 1Kg/m 2 , 4Kg/m 2 when using the HB primer separate application method, and 7Kg/m 2 when using the vinyl acetate emulsion + urea resin separate application method. 2. 18Kg/m 2 for hot melt adhesive. In this way, the adhesive strength without microwave irradiation was extremely small.
この発明は以上説明したように少くとも挾着部
をマイクロ波を浴びても誘導体電流を流さない絶
縁性とした圧締治具を設け、この治具で木材を挾
着圧締したため、これにマイクロ波を照射して
も、従来の金属製治具のように治具自体が加熱さ
れないので、圧締部分の木材が焦げて押圧力が減
ずることがない。このように加圧しながらマイク
ロ波を照射して接着剤を硬化させることが可能と
なつたので、接着剤は木材の細胞間に容易に滲透
して所謂投錨効果が生ずるため、大きな接着・性
能が得られる。また加圧しながらマイクロ波を照
射するので、従来照射と加圧を分けて二工程とし
ていた作業を一工程に短縮できる効果も生ずるも
のである。また圧締治具は上記のように弾性体の
弾力を使つて挾着するため、構造簡単で安価に提
供できるものである。 As explained above, this invention provides a clamping jig whose clamping part is insulated so that no inductive current flows even when exposed to microwaves, and the wood is clamped and clamped with this jig. Even when irradiated with microwaves, the jig itself is not heated unlike conventional metal jigs, so the wood in the pressed area will not burn and the pressing force will not decrease. In this way, it has become possible to harden the adhesive by irradiating it with microwaves while applying pressure, which allows the adhesive to easily penetrate between the cells of the wood, creating a so-called anchoring effect, which greatly improves adhesion and performance. can get. Furthermore, since the microwave is irradiated while applying pressure, the work that conventionally required irradiation and pressurization to be separated into two steps can be shortened to one step. Furthermore, since the clamping jig uses the elasticity of the elastic body to clamp the clamping jig as described above, it has a simple structure and can be provided at low cost.
第１図はこの発明の第１実施例、第２図は第２
実施例、第３図は第４実施例を示す説明図であ
る。
１……開口端、２，４……環状体、３，５……
圧締治具、６……挾着部。
FIG. 1 shows a first embodiment of the invention, and FIG. 2 shows a second embodiment.
Embodiment FIG. 3 is an explanatory diagram showing a fourth embodiment. 1... Open end, 2, 4... Annular body, 3, 5...
Pressing jig, 6... clamping part.
Claims (1)
とも挾着部を絶縁性した圧締治具によつて挾着
し、この加圧状態でマイクロ波を照射して接着剤
を乾燥硬化させることを特徴とする木材の接着方
法。 ２ 一側を開口端とした環状体で、少くとも開口
端の挾着部を絶縁性とし、且つ開口端を無理に開
くとそこに強い挾着力を生ずる適度の弾性体で形
成したことを特徴とする圧締治具。[Scope of Claims] 1. Two pieces of wood whose joint surfaces are coated with adhesive are clamped together using a clamping jig whose clamping parts are insulated, and in this pressurized state, microwaves are irradiated. A wood bonding method characterized by drying and curing the adhesive. 2. An annular body with an open end on one side, at least the clamping part of the open end is insulating, and is made of a moderately elastic material that generates a strong clamping force when the open end is forced open. Pressing jig for
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18956783A JPS6081274A (en) | 1983-10-11 | 1983-10-11 | Method for bonding wood and clamping jig therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18956783A JPS6081274A (en) | 1983-10-11 | 1983-10-11 | Method for bonding wood and clamping jig therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6081274A JPS6081274A (en) | 1985-05-09 |
| JPS634763B2 true JPS634763B2 (en) | 1988-01-30 |
Family
ID=16243490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18956783A Granted JPS6081274A (en) | 1983-10-11 | 1983-10-11 | Method for bonding wood and clamping jig therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6081274A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945623U (en) * | 1972-07-25 | 1974-04-22 | ||
| JPS5334388U (en) * | 1976-08-30 | 1978-03-25 | ||
| JPS5882704A (en) * | 1981-11-11 | 1983-05-18 | 株式会社 天童木工 | Compression clamping molding method for wooden sheet |
| JPS634763A (en) * | 1986-06-25 | 1988-01-09 | Canon Inc | Recorder |
-
1983
- 1983-10-11 JP JP18956783A patent/JPS6081274A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945623U (en) * | 1972-07-25 | 1974-04-22 | ||
| JPS5334388U (en) * | 1976-08-30 | 1978-03-25 | ||
| JPS5882704A (en) * | 1981-11-11 | 1983-05-18 | 株式会社 天童木工 | Compression clamping molding method for wooden sheet |
| JPS634763A (en) * | 1986-06-25 | 1988-01-09 | Canon Inc | Recorder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6081274A (en) | 1985-05-09 |
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