JP3510504B2 - Control method and apparatus for compression molding machine - Google Patents
Control method and apparatus for compression molding machineInfo
- Publication number
- JP3510504B2 JP3510504B2 JP30802898A JP30802898A JP3510504B2 JP 3510504 B2 JP3510504 B2 JP 3510504B2 JP 30802898 A JP30802898 A JP 30802898A JP 30802898 A JP30802898 A JP 30802898A JP 3510504 B2 JP3510504 B2 JP 3510504B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- mold
- preheating
- molding machine
- pressure
- 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 - Lifetime
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Description
【０００１】[0001]
【発明の属する技術分野】熱硬化性樹脂原料を圧縮成形
する方法とそのための制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for compression-molding a thermosetting resin material and a control device therefor.
【０００２】[0002]
【従来の技術】図１に示すのは、本発明に係る圧縮成形
機の型締装置、原料供給装置および制御装置を概略的に
図示したものであるが、型締装置１１および原料供給装
置２０に関しては従来の技術と同一である。型締装置１
１は、固定盤４と、固定盤４に取付けた固定金型１と、
可動盤５と、可動盤５に取付けた可動金型２と、固定金
型１と可動金型２との間の金型間隔をラック８と歯合す
るエンコーダ等により検出する位置検出器９と、可動金
型２を固定金型１に密着加圧・離隔可能にするラム６
と、ラム６を油圧密に嵌挿するシリンダ７とからなる。
原料供給装置２０は、可動金型２が固定金型１から十分
離隔したとき可動金型２のキャビティ３内に原料１９を
供給するための装置であり、原料１９を貯留する無底の
ホッパ１２と、ホッパ１２の下部に樹脂等からなるシー
ル材１５を介してシリンダ１４により原料１９が漏洩せ
ずに摺動可能とするコンベア１３と、ホッパ１２の底部
範囲のコンベア１３に穿孔した貫通孔３１と連通する伸
縮自在のチューブ１６と、シリンダ１８によりチューブ
１６の底部を下方に貫通と非貫通に選択するシャッタ１
７とからなる。2. Description of the Related Art FIG. 1 schematically shows a mold clamping device, a raw material supplying device and a control device of a compression molding machine according to the present invention. The mold clamping device 11 and the raw material supplying device 20. Is the same as the conventional technique. Mold clamping device 1
1 is a fixed platen 4, a fixed mold 1 attached to the fixed platen 4,
A movable platen 5, a movable mold 2 attached to the movable platen 5, and a position detector 9 for detecting a mold interval between the fixed mold 1 and the movable mold 2 by an encoder or the like that meshes with the rack 8. A ram 6 that enables the movable mold 2 to be closely pressed and separated from the fixed mold 1.
And a cylinder 7 into which the ram 6 is hydraulically fitted.
The raw material supply device 20 is a device for supplying the raw material 19 into the cavity 3 of the movable mold 2 when the movable mold 2 is sufficiently separated from the fixed mold 1, and is a bottomless hopper 12 that stores the raw material 19. And a conveyor 13 that allows the raw material 19 to slide on the lower part of the hopper 12 through a sealing material 15 made of resin or the like by the cylinder 14 without leaking, and a through hole 31 formed in the conveyor 13 in the bottom area of the hopper 12. A retractable tube 16 that communicates with the shutter 1, and a shutter 1 that selects a penetrating or non-penetrating bottom portion of the tube 16 downward by a cylinder 18.
It consists of 7.
【０００３】次に作動について説明する。前ショットの
成形が終了し、可動盤５を下降して成形品を取出した
後、次の成形のため原料供給装置２０を金型間に侵入さ
せる。図２の（１）に示すように、シャッタ１７を閉位
置にし、コンベア１３をその貫通孔３１がホッパ１２の
底部に位置するように移動させる。原料１９は貫通孔３
１を通じてチューブ１６とシャッタ１７により形成され
た計量枡に落下する。チューブ１６はテレスコープ式に
伸縮自在となっており、成形品の大きさに応じて枡の容
積が変えられるようにしている。また、チューブ１６の
位置と数はキャビティ３に対応させている。次に（２）
ではシリンダ１４を伸長させコンベア１３を金型内に侵
入させて位置決めさせた後、シリンダ１８によりシャッ
タ１７を開放し枡の中の原料をキャビティ３内に落下さ
せる。そして、（３）に示すようにコンベア１３を
（１）の位置に戻した後型閉して成形を開始する。Next, the operation will be described. After the molding of the previous shot is completed and the movable platen 5 is lowered to take out the molded product, the raw material supply device 20 is inserted between the molds for the next molding. As shown in (1) of FIG. 2, the shutter 17 is set to the closed position, and the conveyor 13 is moved so that the through hole 31 is located at the bottom of the hopper 12. Raw material 19 is through hole 3
It falls through the measuring cell formed by the tube 16 and the shutter 17 through 1. The tube 16 is telescopically expandable and contractible so that the volume of the box can be changed according to the size of the molded product. Further, the position and the number of the tubes 16 correspond to the cavities 3. Next (2)
Then, the cylinder 14 is extended and the conveyor 13 is inserted into the mold to be positioned, then the shutter 17 is opened by the cylinder 18 and the raw material in the box is dropped into the cavity 3. Then, as shown in (3), the conveyor 13 is returned to the position of (1), and then the mold is closed to start molding.
【０００４】図３は圧縮成形の工程中の位置検出器９と
圧力検出器１０の信号を時間経過で示したものである。
従来の制御状態は図３において破線で示すものとなる。
すなわち可動金型２が圧縮完了位置２８に接近するに従
い、可動金型２内の原料は固定金型１のコアにより徐々
に圧縮されてゆく。そして予熱開始位置２９に到達した
とき、可動盤５はその位置を保持して原料を予熱する。
原料予熱工程が終了すると圧縮工程が開始し、可動盤５
は所定の圧縮速度で圧縮完了位置２８に向かって移動す
る。その後ガス抜きのため僅か型開きし再加圧して成形
を終了する。FIG. 3 shows the signals of the position detector 9 and the pressure detector 10 during the compression molding process over time.
The conventional control state is shown by the broken line in FIG.
That is, as the movable mold 2 approaches the compression completion position 28, the raw material in the movable mold 2 is gradually compressed by the core of the fixed mold 1. When the preheat start position 29 is reached, the movable platen 5 holds the position to preheat the raw material.
When the raw material preheating process ends, the compression process starts and the movable platen 5
Moves toward the compression completion position 28 at a predetermined compression speed. After that, the mold is slightly opened for degassing, and the pressure is applied again to finish the molding.
【０００５】[0005]
【発明が解決しようとする課題】上記のような従来の成
形方法において、原料の計量は枡の容積によるためホッ
パ１２に貯留された原料１９の多少に応じて枡にかかる
圧力が変化し、原料の実質的な容積が変化するのであ
る。例えば、ホッパ１２の原料１９が多い場合、枡の原
料の密度は高くなり実質的な原料の量が増加する。この
原料を圧縮成形した場合、ガス抜けが悪くなり成形品に
膨れ不良が発生するのである。また、原料の製造ロッド
の相違や予熱開始位置まで加圧移動する時間のバラツキ
により硬化速度が変化して、ガス抜けを阻害したり成形
品のバリの発生状況が変化する等の問題が発生する。In the conventional molding method as described above, since the raw material is measured by the volume of the square, the pressure applied to the square changes depending on the amount of the raw material 19 stored in the hopper 12. The actual volume of is changed. For example, when the amount of the raw material 19 of the hopper 12 is large, the density of the raw material of the masu is high and the substantial amount of the raw material is increased. When this raw material is compression-molded, outgassing is deteriorated and a molded product is swelled and defective. Further, the curing rate changes due to the difference in the manufacturing rod of the raw material and the variation in the time of pressurizing and moving to the preheating start position, which causes problems such as inhibiting outgassing and changing the occurrence of burrs in the molded product. .
【０００６】[0006]
【課題を解決するための手段】そこで、金型を加圧・圧
縮して金型間隔が所定位置に到達するかまたは加圧力が
所定値に上昇したとき、原料予熱工程を開始するように
し、そのための制御装置として、金型間隔が所定位置に
達したとき予熱工程を開始する信号を発信する予熱開始
位置設定器および比較部と、金型の加圧力が所定値に達
したとき予熱工程を開始する信号を発信する予熱開始圧
力設定器および比較部と、前記二の予熱工程を開始する
信号のいずれかを選択する識別部とを備えるようにした
のである。[Means for Solving the Problems] Therefore, when the die is pressed / compressed to reach a predetermined position or the pressurizing force rises to a predetermined value, the raw material preheating step is started. As a control device therefor, a preheating start position setter and a comparison unit for transmitting a signal to start the preheating process when the mold interval reaches a predetermined position, and a preheating process when the mold pressing force reaches a predetermined value. The preheating start pressure setting device and the comparison unit for transmitting the signal for starting and the identifying unit for selecting one of the signals for starting the second preheating process are provided.
【０００７】[0007]
【発明の実施の形態】図１に基づいて本発明の実施の形
態を詳細に説明する。前記したように、型締装置１１と
原料供給装置２０は従来の技術と同一であるが、型締装
置１１にはシリンダ７の圧力室の圧力を検出する圧力検
出器１０を備えている。油圧駆動装置２１は油圧ポン
プ、流量制御弁、圧力制御弁、方向切換弁等からなり電
気信号によって設定値に応じた流量や圧力の作動油をシ
リンダ７等に供給する。制御装置２７は油圧駆動装置２
１や原料供給装置２０を制御する電気信号を出力し、論
理演算回路またはマイクロプロセッサから構成され、所
定の成形作動を実行する。予熱開始位置設定器２２は図
３における予熱開始位置２９を設定し、その信号は位置
検出器９の信号と比較部２３で比較演算され、可動盤５
が予熱開始位置設定器２２の位置に到達したとき一致信
号を識別部２６へ出力する。一方、予熱開始圧力設定器
２４は図３における予熱開始圧力３０を設定し、その信
号は圧力検出器１０の信号と比較部２５で比較演算さ
れ、シリンダ７の圧力室の油圧が予熱開始圧力設定器２
４の圧力に到達したとき一致信号を識別部２６へ出力す
る。識別部２６は前記二の一致信号のうちいずれか速く
入力された信号によって予熱工程を開始するように油圧
駆動装置２１を制御する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail with reference to FIG. As described above, the mold clamping device 11 and the raw material supply device 20 are the same as those in the conventional technique, but the mold clamping device 11 is equipped with the pressure detector 10 for detecting the pressure in the pressure chamber of the cylinder 7. The hydraulic drive device 21 is composed of a hydraulic pump, a flow rate control valve, a pressure control valve, a direction switching valve, and the like, and supplies hydraulic oil having a flow rate and a pressure corresponding to a set value to the cylinder 7 and the like by an electric signal. The control device 27 is the hydraulic drive device 2.
1 and an electric signal for controlling the raw material supply device 20 are output, which is composed of a logical operation circuit or a microprocessor and executes a predetermined molding operation. The preheat start position setter 22 sets the preheat start position 29 in FIG. 3, and the signal thereof is compared with the signal of the position detector 9 in the comparison unit 23, and the movable plate 5 is moved.
When reaches the position of the preheat start position setter 22, a coincidence signal is output to the identification unit 26. On the other hand, the preheating start pressure setter 24 sets the preheating start pressure 30 in FIG. 3, and the signal is compared with the signal of the pressure detector 10 in the comparison unit 25, and the hydraulic pressure in the pressure chamber of the cylinder 7 is set to the preheating start pressure setting. Bowl 2
When the pressure of 4 is reached, a coincidence signal is output to the identification unit 26. The identification unit 26 controls the hydraulic drive device 21 to start the preheating process according to whichever of the two coincidence signals is input earlier.
【０００８】図３に基づいて本発明の作動を説明する。
通常の成形状態では、可動盤５が予熱開始位置２９に達
する前にシリンダ７の圧力が予熱開始圧力３０に到達す
るように予熱開始位置設定器２２および予熱開始圧力設
定器２４をそれぞれ適宜調整設定する。可動盤５が固定
盤４に接近して、可動金型２のキャビティ３内の原料が
固定金型１のコアによって加圧・圧縮されると、その反
力としてシリンダ７の加圧室内の油圧が次第に上昇して
ゆき予熱開始圧力３０（時間A）に達したとき可動盤５
の圧縮・移動信号を切換えてその位置を保持させる。こ
の工程は原料予熱工程であり、次の予め定めた圧縮工程
が開始するとき（時間B）まで継続する。予熱開始位置
２９に達する前までに予熱開始圧力３０が発信しなかっ
たときには、破線で示すように予熱開始位置２９により
予熱工程が開始される。The operation of the present invention will be described with reference to FIG.
In a normal molding state, the preheating start position setting device 22 and the preheating starting pressure setting device 24 are appropriately adjusted and set so that the pressure of the cylinder 7 reaches the preheating starting pressure 30 before the movable platen 5 reaches the preheating starting position 29. To do. When the movable platen 5 approaches the fixed platen 4 and the raw material in the cavity 3 of the movable mold 2 is pressurized / compressed by the core of the fixed mold 1, the reaction force is the hydraulic pressure in the pressurizing chamber of the cylinder 7. When the preheating start pressure reaches 30 (time A), the movable platen 5
The compression / movement signal of is switched to hold its position. This step is a raw material preheating step and continues until the next predetermined compression step starts (time B). When the preheating start pressure 30 has not been transmitted before reaching the preheating start position 29, the preheating step is started by the preheating start position 29 as indicated by the broken line.
【０００９】圧縮工程はガス抜き工程や再加圧工程とと
もに予めプログラムされており、その終了時期（時間
C）と圧縮速度は制御装置２７のプログラム設定器によ
って設定されている。すなわち図３から理解出来るよう
に、時間B−C間の圧縮工程の勾配は固定されており、予
熱開始圧力３０に応じて変化する時間Aによって原料予
熱工程である時間A−Bは変化する。The compression process is pre-programmed together with the degassing process and the repressurizing process, and the end time (time
C) and the compression speed are set by the program setter of the controller 27. That is, as can be understood from FIG. 3, the gradient of the compression process between times B and C is fixed, and the time A-B that is the raw material preheating process changes with the time A that changes according to the preheating start pressure 30.
【００１０】[0010]
【実施例】次に、実成形における実施例を説明する。使
用した成形機は名機製作所製のMCP−５０型直圧プレス
成形機（型締力５０トン）であり、電気配線部品の４個
取り金型によりユリア樹脂を圧縮力２６トン（圧縮油圧
力７４kg/cm2）で成形した。従来技術による成形におい
ては、月産約７万５千個のうち約８百６十個余りの膨れ
不良、ガス割れ不良、ガス残り不良が発生し、不良率は
１．１〜１．２％に達した。上記と同一の成形を本発明
の技術で成形したところ、ガスが原因の上記不良はなく
なり、不良率はほぼ零となった。また、他の１６点の金
型における成形では、ガスによる不良率は６０％に低減
した。EXAMPLES Next, examples of actual molding will be described. The molding machine used is a MCP-50 type direct pressure press molding machine (mold clamping force 50 tons) manufactured by Meiki Seisakusho, which compresses urea resin to a compression force of 26 tons (compressing oil pressure) with a mold for taking four electric wiring parts. It was molded at 74 kg / cm 2 ). In the molding by the conventional technology, out of about 75,000 pieces per month, about 860 pieces of swelling defects, gas cracking defects, and gas residue defects occur, and the defect rate is 1.1 to 1.2%. Reached When the same molding as described above was molded by the technique of the present invention, the above defects caused by gas disappeared and the defect rate became almost zero. Further, in the molding with the other 16-point mold, the defective rate due to gas was reduced to 60%.
【００１１】[0011]
【発明の効果】本発明によれば、予熱工程の開始を位置
のみによらず、位置と圧力を組み合わせた制御としたの
で、金型に供給される原料の量や硬化速度のバラツキに
影響されない成形を実施でき、成形の不良率を激減する
ことが出来た。According to the present invention, since the start of the preheating step is controlled not only by the position but also by the combination of the position and the pressure, it is not affected by the variation in the amount of the raw material supplied to the mold and the curing speed. Molding could be carried out and the defective rate of molding could be drastically reduced.
【図１】本発明を実施する圧縮成形機の構成の概要を示
す説明図である。FIG. 1 is an explanatory diagram showing an outline of a configuration of a compression molding machine for carrying out the present invention.
【図２】本発明の圧縮成形機の原料供給状態を説明する
原料供給装置の断面図である。FIG. 2 is a sectional view of a raw material supply device for explaining a raw material supply state of the compression molding machine of the present invention.
【図３】本発明の圧縮成形機の金型位置と圧縮油圧力を
示す作動図である。FIG. 3 is an operation diagram showing a mold position and compression oil pressure of the compression molding machine of the present invention.
１ ……… 固定金型 ２ ……… 可動金型 ３ ……… キャビティ ４ ……… 固定盤 ５ ……… 可動盤 ６ ……… ラム ７ ……… シリンダ ９ ……… 位置検出器 １０ …… 圧力検出器 １１ …… 型締装置 １２ …… ホッパ １３ …… コンベア １６ …… チューブ １７ …… シャッタ １９ …… 原料 ２０ …… 原料供給装置 ２１ …… 油圧駆動装置 ２２ …… 予熱開始位置設定器 ２３、２５ …… 比較部 ２４ …… 予熱開始圧力設定器 ２６ …… 識別部 ２７ …… 制御装置 ２８ …… 圧縮完了位置 ２９ …… 予熱開始位置 ３０ …… 予熱開始圧力 ３１ …… 貫通孔 1 ……… Fixed mold 2 ……… Movable mold 3 ……… Cavity 4 ……… Fixed board 5 ……… Movable plate 6 ……… Ram 7 ……… Cylinder 9 ……… Position detector 10 ... Pressure detector 11 …… Mold clamping device 12 …… Hopper 13 …… Conveyor 16 …… Tube 17 ... Shutter 19 …… Raw material 20 …… Raw material supply device 21 ... Hydraulic drive 22 …… Preheat start position setting device 23, 25 …… Comparison section 24 …… Preheating start pressure setting device 26 …… Identification section 27 ... Control device 28 ... compression completion position 29 …… Preheating start position 30 …… Preheating start pressure 31 ・ ・ ・ Through hole
Claims (3)
ティに供給後、金型により加圧する圧縮成形機の制御方
法において、金型を加圧・圧縮して金型間隔が所定位置
に到達するかまたは加圧力が所定値に上昇したとき、原
料予熱工程を開始することを特徴とする圧縮成形機の制
御方法。1. A method of controlling a compression molding machine in which a predetermined amount of a thermosetting resin raw material is supplied to a mold cavity and then pressure is applied by the mold so that the mold is pressed and compressed so that the mold interval is at a predetermined position. A method for controlling a compression molding machine, which comprises starting a raw material preheating step when the pressure reaches a predetermined value or when a pressing force rises to a predetermined value.
が原料予熱工程の開始時期に影響されないように制御す
ることを特徴とする請求項１に記載の圧縮成形機の制御
方法。2. The method for controlling a compression molding machine according to claim 1, wherein the end time of the compression step following the raw material preheating step is controlled so as not to be influenced by the start time of the raw material preheating step.
ティに供給後、金型により加圧する圧縮成形機の制御装
置において、 金型間隔が所定位置に達したとき予熱工程を開始する信
号を発信する予熱開始位置設定器および比較部と、金型
の加圧力が所定値に達したとき予熱工程を開始する信号
を発信する予熱開始圧力設定器および比較部と、前記二
の予熱工程を開始する信号のいずれかを選択する識別部
とを有する圧縮成形機の制御装置。3. A signal for starting a preheating step when a die interval reaches a predetermined position in a controller of a compression molding machine in which a predetermined amount of a thermosetting resin raw material is supplied to a die cavity and then pressurized by the die. The preheating start position setter and the comparison unit, the preheating start pressure setter and the comparison unit that sends a signal to start the preheating process when the mold pressure reaches a predetermined value, and the second preheating process. A control device for a compression molding machine, comprising: an identification unit that selects one of the signals to start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30802898A JP3510504B2 (en) | 1998-10-29 | 1998-10-29 | Control method and apparatus for compression molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30802898A JP3510504B2 (en) | 1998-10-29 | 1998-10-29 | Control method and apparatus for compression molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000127192A JP2000127192A (en) | 2000-05-09 |
| JP3510504B2 true JP3510504B2 (en) | 2004-03-29 |
Family
ID=17976028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30802898A Expired - Lifetime JP3510504B2 (en) | 1998-10-29 | 1998-10-29 | Control method and apparatus for compression molding machine |
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| JP (1) | JP3510504B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103978618B (en) * | 2014-06-04 | 2016-06-08 | 无锡新宏泰电器科技股份有限公司 | A kind of compression mould folding mould controlling organization |
| CN105058676A (en) * | 2015-07-16 | 2015-11-18 | 佛山威明塑胶有限公司 | Thin-film heating roller heating system |
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1998
- 1998-10-29 JP JP30802898A patent/JP3510504B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| JP2000127192A (en) | 2000-05-09 |
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