JP2700543B2 - Thermal pressure control method for multi-stage press - Google Patents
Thermal pressure control method for multi-stage pressInfo
- Publication number
- JP2700543B2 JP2700543B2 JP62068312A JP6831287A JP2700543B2 JP 2700543 B2 JP2700543 B2 JP 2700543B2 JP 62068312 A JP62068312 A JP 62068312A JP 6831287 A JP6831287 A JP 6831287A JP 2700543 B2 JP2700543 B2 JP 2700543B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- plywood material
- heating
- time
- reduced
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/06—Platens or press rams
- B30B15/062—Press plates
- B30B15/064—Press plates with heating or cooling means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
- Control Of Presses (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、上下方向、若しくは左右方向に複数段の熱
板が開閉自在に配設された多段プレスにおいて、供給さ
れる合板材料の種類、特にその縦横サイズに加え、その
材厚に応じて、加圧開始から加圧終了に至るまでの熱圧
制御方法に関するものである。
「従来の技術」
従来より、その上下面に接着剤が塗布されたベニヤ単
板を複数枚積層した後、仮圧締した合板材料を多段プレ
スの各段の熱板間にて加熱加圧するに際しては、合板材
料の縦横サイズから求められた面積に応じて、油圧シリ
ンダの吐出圧力を制御していた。またこの時、熱板間へ
供給される合板材料は、複数種の縦横サイズを有してい
るので、合板材料の単位面積当りの加圧力が等しくなる
様に、油圧シリンダへのポンプによる吐出圧力をその都
度変更していた。
通常、合板材料の単位圧力gと、ポンプの吐出圧力P
の関係は、
によって求められる。
ただし、上式において、Wは総圧縮力(kg)、Aは合
板材料の面積(cm2)、Sはシリンダの面積、dはシリ
ンダの内径、nはシリンダの本数である。尚、シリンダ
の面積S、シリンダの内径d、シリンダの本数nは、当
初設置された多段プレスにおいては不変であり、一定の
定数となるので、合板材料の面積が変化すれば、上式か
らポンプの吐出圧力を変更することによて、合板材料の
最適面圧を求めて加圧制御を行うことになる。
即ち、上式が設定されている演算部による演算結果に
基づいて、ポンプによって油圧シリンダへ圧油が給送さ
れ、また、その吐出圧力を調整すべく、リリーフ弁を介
して、ポンプの吐出圧力を変更し、合板材料を最適面圧
にて加圧制御することになる。
「発明が解決しようとする問題点」
しかしながら、上式からの計算結果により得られた油
圧シリンダの加圧制御は、合板材料の面積に基づく平面
的な要素のみで決定されている。即ち、合板材料を熱板
間にて加圧する時、熱板温度を合板材料の上下より深層
部分まで到達させて、合板材料を構成する各ベニヤ単板
間に塗布されている接着剤層を加熱し、加圧しながら加
熱による接着剤の硬化時間を正確に規制することが必要
となるが、合板材料は立体的であり、その板厚が大小存
在しており、この材厚に応じた加熱加圧時間を正確に規
制していなかった。
「問題点を解決するための手段」
本発明は叙上に鑑み、開閉自在とされ、相互に隣接す
る複数段の熱板間で加熱加圧される合板材料の縦横サイ
ズ、材厚に応じて類型化し、各類型毎にそれぞれ定めた
加熱加圧条件を予めコンピュータ内に組み込み、熱板間
に供給される合板材料の縦横サイズと材厚とから、これ
と合致する、もしくは最も近似する類型を選んで、それ
に応じた加熱加圧条件で加熱加圧作業を行う方法におい
て、該加熱加圧条件と多段プレスの熱板温度、シリンダ
の吐出圧力、熱圧時間をそれぞれ検出する検出器からの
検出値とを一致させるように熱板温度、シリンダの吐出
圧力、熱圧時間を制御し、特に、厚さの大きい合板材料
に対しては、任意設定時間の加圧、或いは圧力に上限と
下限とを設定することによって圧力に幅を持たせ、圧力
が上限に達したら加圧力の供給を停止し、下限に達した
ら再び加圧力を供給し、設定された幅の中で圧力を調整
した(以後調圧という)後に一旦減圧し、減圧した状態
で圧力を保持したり、若しくは減圧した状態にて再び調
圧する加熱加圧条件としたものである。
「実施例」
以下、本発明の一実施例を添付図面に基づいて説明す
る。
まず、本発明に採用される多段プレスの概要を第6図
乃至第7図に基づいて説明する。
即ち、第6図に示す縦型の多段プレス1とは、支柱2
を介して上フレーム3と下フレーム4を上下に一定間隔
を置いて対設し、下フレーム4に設置された油圧シリン
ダ5のラム6によって、可動盤7を昇降自在とし、この
可動盤7と上フレーム3間に等間隔を置いて熱板8を複
数段配設したものであり、これら熱板8間に合板材料9
を挿入載置した後、可動盤7を上昇させて最下部に位置
する熱板8から、その上の熱板8を合板材料9を介して
順次押し上げてプレス閉鎖し、合板材料9を加熱加圧す
るものである。
また、第7図に示す横型の多段プレス10とは、上横梁
11と下横梁12を介して左フレーム13と右フレーム14が左
右に対設され、右フレーム14に設けられた油圧シリンダ
15のラム16によって可動盤17を左右方向に往復動自在と
し、また一方、左フレーム13と可動盤17の間には、上横
梁11に設置された軌条18に、上部両側から移動部材19を
突出させた熱板20が複数段吊持され、各段の熱板20と可
動盤17の四隅部には、ブラケット21と規制具22が各々一
組として配置された搬送コンベヤ23によって、合板材料
9をほぼ直立状態に搬送して各段の熱板20間へ介挿し、
可動盤17の往動に伴って、熱板20を順次左方向へ縮閉さ
せてプレス閉鎖状態とし、加熱加圧される合板材料9に
対する加圧力のバラツキ、厚み減り等を防止したもので
ある。
これら縦型或いは横型の多段プレス1,10の油圧シリン
ダ5,15には、通常、オイルタンク24からモータ25を介し
て駆動される可変吐出ポンプ26によって圧油が給送され
ており、また、その吐出圧力を調整すべく、圧力調整を
可能としたリリーフ27弁が配管途上に設置されて成る油
圧制御回路28を構成している。
一方、コンピュータ29内には、合板材料9の縦横サイ
ズ、材厚に応じて類型30化し、各類型30毎にそれぞれ定
めた加熱加圧条件が予め複数組み込まれ、各類型30毎に
定めた加熱加圧条件、即ち、単位面積当りの加圧力を求
める式と、ベニヤ単板を加熱することによって深層部分
の接着剤を硬化させるに必要な温度並びに時間と、若し
くは両者の相関関係に基づいて定めた加熱加圧条件が、
プログラム31化されて備えられている。
即ち、合板材料9は、その面積については前記式によ
って得られた最適の加圧力を、また材厚の大小について
は、設定された熱板温度に基づく所要時間長さを調整し
て、第2図に示すタイムチャート図のように決定されて
いる。このタイムチャート図によれば、プログラム31に
おいて設定された圧力を7kg/cm2、温度を115℃、加圧調
圧時間を60秒としている。
また特に特定の材厚以上の合板材料9、例えば、材厚
5mm以上の合板材料9については、第3図に示すタイム
チャート図のように、プログラム31において設定された
第1段加圧の圧力を7kg/cm2、温度を120℃として、60秒
の加圧調圧後に一旦減圧し、減圧した状態で40秒間だ
け、その圧力を保持したり、さらに、第4図のタイムチ
ャート図に示すように、減圧した状態にて、40秒間再び
調圧する加熱加圧条件も組み込み、合板材料9の“フク
レ”、“パンク”等を防止すべく、加圧状態を一旦減圧
して合板材料9内に滞留する含有水分を大気へ放出する
ものである。
このプログラム31内に設定された変数のうち、設定圧
力は逐次変換された信号によって油圧シリンダ5,15への
吐出圧力を制御することになり、またこの時、設定温度
は、前記熱板8,20の入側へ蒸気を供給し、出側よりドレ
ンを排出している各蒸気ヘッダ32に設置された温度調節
器33によって制御される。
一方、縦型、横型の多段プレス1,10には、作動中の熱
板温度、シリンダの吐出圧力、熱圧時間の各値を把握す
る検出器が配置されており、プログラム31内に組み込ま
れた類型30の各変数と対比させている。即ち、前記油圧
シリンダ5,15に対する吐出圧力は、圧力検出器34によっ
て常時検出されており、この圧力の検出値35は逐次比較
部36へフィードバックされることになる。また同様に、
前記熱板8,20の出側から蒸気ヘッダ32のドレン温度を温
度検出器37によって常時検出し、この温度の検出値38を
逐次前記比較部36へフィードバックしている。次いで、
各検出値35,38は前記比較部36内において、前記コンピ
ュータ29から送信されている任意の類型30による経時点
の各変数と逐次比較され、その比較結果が相異する場合
には、類型30による経時点の各変数と合致、若しくは近
似するように、リリーフ弁27によって油圧シリンダ5,15
に対する吐出圧力を調整したり、温度調節器33によって
蒸気ヘッダ32からの熱板8,20への蒸気の流量を制御する
ものである。
しかして、縦型或いは横型の多段プレス1,10の熱板8,
20間へ供給される合板材料9は、その縦横サイズ、材厚
がローダ側に配置した光電管、リミットスイッチ等の検
出器、或いは手動によってコンピュータ29内へ入力され
れば、この入力値に基づいて、最適の加熱加圧条件が前
記記載の如く自動的に選択され、この加熱加圧条件にて
加熱加圧されることになる。
尚、本実施例、特に第3図乃至第4図に示すタイムチ
ャート図においては、厚さの大きい合板材料9を加熱加
圧するに際し、任意時間の加圧調圧後に1回のみ減圧す
る場合を説明しているが、その材厚がさらに増大する場
合には、第5図に示すように減圧回数を材厚に応じて増
やし、減圧する毎に、第3図のように減圧した状態で圧
力を保持したり、若しくは第4図のように減圧した状態
にて再び調圧するものとし、また、減圧する毎にその時
間を逓減するのものとする。
「効果」
以上のように本発明によれば、開閉自在とされ、相互
に隣接する複数段の熱板間で加熱加圧される合板材料の
縦横サイズ、材厚に応じて類型化し、各類型毎にそれぞ
れ定めた加熱加圧条件を予めコンピュータ内に組み込
み、熱板間に供給される合板材料の縦横サイズと板厚と
から、これと合致する、もしくは最も近似する類型を選
んで、それに応じた加熱加圧条件で加熱加圧作業を行う
方法において、該加熱加圧条件と多段プレスの熱板温
度、シリンダの吐出圧力、熱圧時間をそれぞれ検出する
検出器からの検出値とを一致させるように熱板温度、シ
リンダの吐出圧力、熱圧時間を制御するので、前記記載
した従来方法の如き、油圧シリンダの加圧制御を合板材
料の面積に基づく平面的な要素のみで決定していたのに
対し、合板材料の材厚の大小に基づく要素を加え、加熱
による接着剤が硬化する時間を正確に規制して、加熱温
度と加圧時間を相関的に決定することができ、良好なプ
レス制御を期し得るものである。DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a type of plywood material to be supplied in a multi-stage press in which a plurality of hot plates are arranged to be openable and closable in a vertical direction or a horizontal direction. In particular, the present invention relates to a method for controlling heat and pressure from the start of pressurization to the end of pressurization in accordance with the material thickness in addition to the vertical and horizontal sizes. "Prior art" Conventionally, after laminating a plurality of veneer veneers coated with adhesive on the upper and lower surfaces, temporarily press-pressed plywood material is heated and pressed between hot plates in each stage of a multi-stage press Has controlled the discharge pressure of the hydraulic cylinder in accordance with the area determined from the vertical and horizontal sizes of the plywood material. At this time, since the plywood material supplied between the hot plates has a plurality of types of vertical and horizontal sizes, the discharge pressure of the pump to the hydraulic cylinder is adjusted so that the pressing force per unit area of the plywood material becomes equal. Was changed each time. Usually, the unit pressure g of the plywood material and the discharge pressure P of the pump
The relationship is Required by In the above equation, W is the total compressive force (kg), A is the area of the plywood material (cm 2 ), S is the area of the cylinder, d is the inner diameter of the cylinder, and n is the number of cylinders. The area S of the cylinder, the inner diameter d of the cylinder, and the number n of the cylinders are constant in the initially installed multi-stage press and are constant, so if the area of the plywood material changes, the pump By changing the discharge pressure, the pressurization control is performed by obtaining the optimum surface pressure of the plywood material. That is, based on the calculation result by the calculation unit in which the above equation is set, the pump supplies pressure oil to the hydraulic cylinder, and adjusts the discharge pressure of the pump via a relief valve in order to adjust the discharge pressure. And the pressurization of the plywood material is controlled at the optimum surface pressure. "Problems to be Solved by the Invention" However, the pressurization control of the hydraulic cylinder obtained by the calculation result from the above equation is determined only by a planar element based on the area of the plywood material. That is, when the plywood material is pressed between the hotplates, the hotplate temperature is allowed to reach deeper portions from above and below the plywood material, and the adhesive layer applied between the veneer veneers constituting the plywood material is heated. However, it is necessary to accurately regulate the curing time of the adhesive by heating while applying pressure, but the plywood material is three-dimensional, and its thickness is large and small. The pressure time was not precisely regulated. "Means for solving the problem" In view of the above, the present invention is openable and closable, and depends on the vertical and horizontal size and thickness of the plywood material which is heated and pressed between a plurality of hot plates adjacent to each other. Classify, pre-install the heating and pressurizing conditions specified for each type in the computer in advance, and determine the type that matches or is the closest to this from the vertical and horizontal sizes and thickness of the plywood material supplied between the hot plates. In the method of selecting and performing the heating and pressurizing work under the heating and pressurizing condition according to the selection, the detection from the detector which detects the heating and pressurizing condition, the hot plate temperature of the multi-stage press, the discharge pressure of the cylinder, and the heat and pressure time respectively The hot plate temperature, cylinder discharge pressure, and heat pressure time are controlled to match the values.Especially, for a thick plywood material, pressurization for an arbitrary set time, or upper and lower limits to the pressure By setting the pressure to the width When the pressure reaches the upper limit, the supply of the pressurizing force is stopped, and when the pressure reaches the lower limit, the pressurizing force is supplied again. After the pressure is adjusted within the set width (hereinafter referred to as pressure regulation), the pressure is reduced once. The heating and pressurizing condition is such that the pressure is maintained in a reduced pressure state or the pressure is adjusted again in the reduced pressure state. Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First, the outline of the multi-stage press employed in the present invention will be described with reference to FIGS. That is, the vertical multi-stage press 1 shown in FIG.
The upper frame 3 and the lower frame 4 are opposed to each other at regular intervals vertically, and the movable plate 7 can be moved up and down by the ram 6 of the hydraulic cylinder 5 installed on the lower frame 4. A plurality of hot plates 8 are arranged at equal intervals between the upper frames 3, and a plywood material 9 is provided between the hot plates 8.
Then, the movable platen 7 is raised and the hot plate 8 located above the lowermost plate is sequentially pushed up through the plywood material 9 to close the press, and the plywood material 9 is heated. To press. The horizontal multi-stage press 10 shown in FIG.
A left frame 13 and a right frame 14 are provided on the right and left via a lower horizontal beam 12 and a hydraulic cylinder provided on the right frame 14.
The movable plate 17 can be reciprocated in the left-right direction by the ram 16 of 15; on the other hand, between the left frame 13 and the movable plate 17, a moving member 19 from both upper sides on a rail 18 installed on the upper cross beam 11. The protruding hot plates 20 are suspended in a plurality of stages, and at each corner of the hot plates 20 and the movable plate 17 at each stage, a bracket 21 and a regulating member 22 are respectively provided as a set by a transport conveyor 23, and a plywood material is provided. 9 is transported almost upright and inserted between the hot plates 20 of each stage,
With the forward movement of the movable platen 17, the hot plate 20 is sequentially contracted to the left to close the press, thereby preventing variations in the pressure applied to the plywood material 9 to be heated and pressed, thickness reduction, and the like. . The hydraulic cylinders 5, 15 of these vertical or horizontal multi-stage presses 1, 10 are usually supplied with pressurized oil by a variable discharge pump 26 driven from an oil tank 24 via a motor 25. In order to adjust the discharge pressure, a hydraulic pressure control circuit 28 is provided in which a relief 27 valve capable of adjusting the pressure is provided on the way of the piping. On the other hand, in the computer 29, types 30 are formed in accordance with the vertical and horizontal sizes and the material thickness of the plywood material 9, and a plurality of heating / pressing conditions respectively set for each type 30 are incorporated in advance. Pressing conditions, that is, formulas for determining the pressing force per unit area, and the temperature and time required to cure the adhesive in the deep layer by heating the veneer veneer, or based on the correlation between both Heat and pressure conditions
The program 31 is provided. That is, the plywood material 9 adjusts the optimal pressing force obtained by the above equation for the area, and adjusts the required time length based on the set hot plate temperature for the thickness of the plywood material. It is determined as in the time chart shown in the figure. According to this time chart, the pressure set in the program 31 is set to 7 kg / cm 2 , the temperature is set to 115 ° C., and the pressurizing and regulating time is set to 60 seconds. Plywood material 9 having a specific thickness or more, for example,
As for the plywood material 9 having a thickness of 5 mm or more, as shown in the time chart of FIG. 3, the first-stage pressurizing pressure set in the program 31 is set to 7 kg / cm 2 and the temperature is set to 120 ° C. for 60 seconds. After the pressure has been adjusted, the pressure is temporarily reduced, and the pressure is maintained for 40 seconds while the pressure is reduced. Further, as shown in the time chart of FIG. 4, the heating pressure is adjusted again for 40 seconds while the pressure is reduced. The pressure condition is also incorporated, and in order to prevent “swelling”, “puncture” and the like of the plywood material 9, the pressurized state is once reduced to release the moisture contained in the plywood material 9 to the atmosphere. Of the variables set in the program 31, the set pressure controls the discharge pressure to the hydraulic cylinders 5, 15 by sequentially converted signals, and at this time, the set temperature is set to the hot plate 8, The steam is supplied to the inlet side of 20, and the drain is discharged from the outlet side. The steam is controlled by a temperature controller 33 installed in each steam header 32. On the other hand, the vertical and horizontal multi-stage presses 1, 10 are equipped with detectors for grasping the hot plate temperature during operation, the discharge pressure of the cylinder, and the heat pressure time, and are incorporated in the program 31. Each variable of type 30 is compared. That is, the discharge pressure to the hydraulic cylinders 5, 15 is constantly detected by the pressure detector 34, and the detected value 35 of this pressure is fed back to the successive comparison unit 36. Similarly,
The drain temperature of the steam header 32 is constantly detected from the outlet sides of the hot plates 8 and 20 by the temperature detector 37, and the detected value 38 of this temperature is sequentially fed back to the comparison unit 36. Then
The respective detection values 35 and 38 are sequentially compared with each variable at the time point according to an arbitrary type 30 transmitted from the computer 29 in the comparison unit 36, and when the comparison results are different, the type 30 The hydraulic cylinders 5, 15 are controlled by the relief valve 27 so as to match or approximate each variable at the time of
And the flow rate of steam from the steam header 32 to the hot plates 8, 20 is controlled by the temperature controller 33. Then, the hot plate 8,10 of vertical or horizontal multi-stage press 1,10
If the plywood material 9 supplied between the spaces 20 is input into the computer 29 by a detector such as a phototube, a limit switch, or the like, whose length and width and thickness are arranged on the loader side, based on the input values, The optimum heating and pressing conditions are automatically selected as described above, and the heating and pressing are performed under the heating and pressing conditions. In addition, in the present embodiment, particularly in the time charts shown in FIGS. 3 and 4, when heating and pressurizing the plywood material 9 having a large thickness, it is assumed that the pressure is reduced only once after the pressure control for an arbitrary time. As described above, when the material thickness further increases, the number of times of depressurization is increased according to the material thickness as shown in FIG. 5, and each time the pressure is reduced, the pressure is reduced in a state as shown in FIG. Or the pressure is adjusted again in a state where the pressure is reduced as shown in FIG. 4, and the time is gradually reduced every time the pressure is reduced. [Effects] As described above, according to the present invention, the plywood material is made openable and closable, and heated and pressed between a plurality of hot plates adjacent to each other. The heating and pressurizing conditions determined for each case are incorporated in the computer in advance, and from the vertical and horizontal sizes and plate thicknesses of the plywood material supplied between the hot plates, a type that matches or is closest to this is selected, and accordingly In the method of performing the heating and pressurizing operation under the heating and pressurizing condition, the heating and pressurizing condition and the detection values from the detectors that detect the hot plate temperature of the multi-stage press, the discharge pressure of the cylinder, and the heat and pressure time are matched. As described above, since the hot plate temperature, the discharge pressure of the cylinder, and the heat pressure time are controlled, the pressurization control of the hydraulic cylinder is determined only by a planar element based on the area of the plywood material as in the above-described conventional method. Whereas plywood material An element based on the size of the material thickness, which can precisely control the time that the adhesive cures due to heating, and determine the heating temperature and pressurization time in a correlated manner, thus ensuring good press control. It is.
【図面の簡単な説明】
第1図は本発明の一実施例の概略を示すブロック線図、
第2図はプログラムの類型の一実施例を示すタイムチャ
ート図、第3図乃至第5図は第2図の他の実施例を示す
タイムチャート図、第6図は本発明の制御に使用される
縦型の多段プレスの一実施例を示す概略側面図、第7図
は本発明の制御に使用される横型の多段プレスの一実施
例を示す一部切欠き側面図
1……縦型の多段プレス、8,20……熱板、
9……合板材料、10……横型の多段プレス、
29……コンピュータ、30……類型、
31……プログラム、33……温度調節器、
34……圧力検出器、35,38……検出値、
36……比較部、37……温度検出器、BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram schematically showing an embodiment of the present invention;
FIG. 2 is a time chart showing one embodiment of the type of program, FIGS. 3 to 5 are time charts showing another embodiment of FIG. 2, and FIG. 6 is used for control of the present invention. FIG. 7 is a schematic side view showing one embodiment of a vertical multi-stage press, and FIG. 7 is a partially cutaway side view showing one embodiment of a horizontal multi-stage press used for control of the present invention. Multi-stage press, 8,20 ... Hot plate, 9 ... Plywood material, 10 ... Horizontal multi-stage press, 29 ... Computer, 30 ... Type, 31 ... Program, 33 ... Temperature controller, 34 ... Pressure detector, 35, 38… Detected value, 36… Comparison part, 37… Temperature detector,
Claims (1)
加熱加圧される合板材料の縦横サイズ、材厚に応じて類
型化し、各類型毎にそれぞれ定めた加熱加圧条件を予め
コンピュータ内に組み込み、熱板間に供給される合板材
料の縦横サイズと材厚とから、これと合致する、もしく
は最も近似する類型を選んで、それに応じた加熱加圧条
件で加熱加圧作業を行う方法において、該加熱加圧条件
と多段プレスの熱板温度、シリンダの吐出圧力、熱圧時
間をそれぞれ検出する検出器からの検出値とを一致させ
るように熱板温度、シリンダの吐出圧力、熱圧時間を制
御することを特徴とする多段プレスの熱圧制御方法。 2.各類型毎にそれぞれ定めた加熱加圧条件のうちの加
圧条件が、合板材料を所定時間加圧調圧した後に一旦減
圧し、減圧した状態で圧力を保持するものである特許請
求の範囲第1項記載の多段プレスの熱圧制御方法。 3.各類型毎にそれぞれ定めた加熱加圧条件のうちの加
圧条件が、合板材料を所定時間加圧調圧した後に一旦減
圧し、減圧した状態にて再び調圧するものである特許請
求の範囲第1項記載の多段プレスの熱圧制御方法。 4.各類型毎にそれぞれ定めた加熱加圧条件のうちの加
圧条件が、合板材料を所定時間加圧調圧した後に一旦減
圧し、減圧した状態で圧力を保持し、この圧力保持後に
その材厚に応じて、さらに複数回減圧して圧力を保持
し、また、減圧する毎にその時間を逓減するものである
特許請求の範囲第1項記載の多段プレスの熱圧制御方
法。 5.各類型毎にそれぞれ定めた加熱加圧条件のうちの加
圧条件が、合板材料を所定時間加圧調圧した後に一旦減
圧し、減圧した状態にて再び調圧し、この調圧後にその
材厚に応じて、さらに複数回減圧して調圧し、また、減
圧する毎にその時間を逓減するものである特許請求の範
囲第1項記載の多段プレスの熱圧制御方法。(57) [Claims] The plywood material is openable and closable, and is heated and pressed between a plurality of adjacent hotplates. The plywood material is classified according to the vertical and horizontal sizes and the material thickness, and the heating and pressing conditions determined for each type are previously stored in a computer. A method of selecting a type that matches or is closest to the length and width of the plywood material and the thickness of the plywood material supplied between the hot plates, and performing the heating and pressing work under the heating and pressing conditions according to that The hot plate temperature, the discharge pressure of the cylinder, and the hot pressure so that the detection values from the detectors that detect the hot press temperature, the hot plate temperature of the multi-stage press, the discharge pressure of the cylinder, and the heat pressure time, respectively, match. A method for controlling heat and pressure of a multi-stage press, characterized by controlling time. 2. The pressurizing condition among the heating and pressurizing conditions respectively defined for each type is such that the plywood material is pressurized and regulated for a predetermined time and then temporarily depressurized, and the pressure is maintained in the depressurized state. 2. The method for controlling heat and pressure of a multi-stage press according to claim 1. 3. The pressurizing condition of the heating and pressurizing conditions respectively defined for each type is such that the plywood material is pressurized and regulated for a predetermined time, and then temporarily depressurized, and then re-pressurized in the depressurized state. 2. The method for controlling heat and pressure of a multi-stage press according to claim 1. 4. The pressurizing condition among the heating and pressurizing conditions determined for each type is as follows. After the plywood material is pressurized and regulated for a predetermined time, the pressure is temporarily reduced, and the pressure is maintained in the reduced pressure state. 2. The method according to claim 1, wherein the pressure is further reduced a plurality of times to maintain the pressure, and each time the pressure is reduced, the time is gradually reduced. 5. The pressurizing condition among the heating and pressurizing conditions defined for each type is as follows. After the plywood material is pressurized and regulated for a predetermined time, the pressure is temporarily reduced, and then the pressure is reduced again. 2. The hot-press control method for a multi-stage press according to claim 1, wherein the pressure is further reduced and adjusted a plurality of times in accordance with the pressure, and the time is gradually reduced each time the pressure is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62068312A JP2700543B2 (en) | 1987-03-23 | 1987-03-23 | Thermal pressure control method for multi-stage press |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62068312A JP2700543B2 (en) | 1987-03-23 | 1987-03-23 | Thermal pressure control method for multi-stage press |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63233802A JPS63233802A (en) | 1988-09-29 |
JP2700543B2 true JP2700543B2 (en) | 1998-01-21 |
Family
ID=13370169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62068312A Expired - Fee Related JP2700543B2 (en) | 1987-03-23 | 1987-03-23 | Thermal pressure control method for multi-stage press |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2700543B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011161751A1 (en) * | 2010-06-21 | 2011-12-29 | 株式会社太平製作所 | Vertical plate press device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4937884B2 (en) * | 2007-11-09 | 2012-05-23 | 株式会社太平製作所 | Finger joint pressing method and device |
CN102615691B (en) * | 2012-04-12 | 2014-11-05 | 刘强 | Hot pressing exhaust device in artificial board manufacture process and hot pressing exhaust method |
CN104552527A (en) * | 2014-12-19 | 2015-04-29 | 广德平江竹业制作有限公司 | Energy-saving plate bending machine for bamboo board |
-
1987
- 1987-03-23 JP JP62068312A patent/JP2700543B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011161751A1 (en) * | 2010-06-21 | 2011-12-29 | 株式会社太平製作所 | Vertical plate press device |
Also Published As
Publication number | Publication date |
---|---|
JPS63233802A (en) | 1988-09-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4645632A (en) | Belt-type particleboard press with flexible upper platen | |
US6500372B1 (en) | Method for the moulding of wood fiber board | |
US4647417A (en) | Particleboard press with spring-loaded platen | |
DE4233622C2 (en) | Pressing process for coating a workpiece and press for carrying out the process | |
EP0699120B1 (en) | Method for compressive shape-drying of wood | |
SE504580C2 (en) | Process and plant for continuous manufacture of chipboard, fiberboard and the like | |
TW201020102A (en) | Horizontal multistage press | |
JP2700543B2 (en) | Thermal pressure control method for multi-stage press | |
TWI516348B (en) | Vertical plate of the stamping device | |
JP2700544B2 (en) | Thermal pressure control method for multi-stage press | |
JP5373384B2 (en) | Vertical cold press machine | |
US6533890B1 (en) | Method and steam press for the production of boards of ligneous material | |
US20100090368A1 (en) | Method and device for the molding of wood fiber board | |
JP2520631B2 (en) | Hot pressure control method for multi-stage press | |
JPH0631500A (en) | Hot press | |
JPH06238696A (en) | Method and device for controlling slide of resin molding press | |
JP2010023289A (en) | Horizontal multi-stage press apparatus | |
JP2010023288A (en) | Horizontal multi-stage press apparatus | |
JP3761613B2 (en) | Press machine | |
US4724757A (en) | Press control and arrangement for compressing particleboard | |
WO2011161751A1 (en) | Vertical plate press device | |
JPH0367482B2 (en) | ||
JP3136047B2 (en) | Wood material compaction treatment method | |
JPH0753364B2 (en) | Hot plate for horizontal multi-stage press | |
JPS60111797A (en) | Method and device for pressurization with horizontal type multi-stage press |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |