JPH03256731A - Mold cooling control method for foam molding machine - Google Patents
Mold cooling control method for foam molding machineInfo
- Publication number
- JPH03256731A JPH03256731A JP2053563A JP5356390A JPH03256731A JP H03256731 A JPH03256731 A JP H03256731A JP 2053563 A JP2053563 A JP 2053563A JP 5356390 A JP5356390 A JP 5356390A JP H03256731 A JPH03256731 A JP H03256731A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- cooling
- cooling water
- water
- temperature
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 17
- 238000010097 foam moulding Methods 0.000 title claims description 5
- 239000000498 cooling water Substances 0.000 claims abstract description 32
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 238000007666 vacuum forming Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 239000007921 spray Substances 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、合成樹脂発泡体を型内酸形する真空成形法に
用いられる金型を冷却する際に冷却時間を制御する方法
に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for controlling cooling time when cooling a mold used in a vacuum forming method in which a synthetic resin foam is formed into an in-mold acid form. be.
一般に、合成樹脂発泡体を型内で真空成形する方法に用
いられる金型は、加熱・冷却して用いられるため成形品
を形成する金型部に温度検知部を取付、検出温度によっ
て成形品の冷却時間を制御することが知られている。In general, molds used for vacuum forming synthetic resin foam in a mold are heated and cooled, so a temperature detection unit is attached to the mold part that forms the molded product, and the detected temperature determines the molded product. It is known to control the cooling time.
そして、従来では通常冷却水として水温３０〜３５℃位
の圧力水を第２図に示すように金型Ａ。Conventionally, pressurized water at a water temperature of about 30 to 35° C. is normally used as cooling water in the mold A as shown in FIG.
Ｂに配管された冷却水管Ｃ，Ｄに備えたスプレーノズル
Ｅ、Ｆにて数秒（３〜５秒程度）噴射し、その後、金型
内を真空にして冷却水を節減した形態で冷却するもので
、金型に付着した水滴の蒸発潜熱をも利用し金型温度を
６０〜７０℃位程度位まで冷却する方法が採られている
。The spray nozzles E and F installed in the cooling water pipes C and D connected to B are used to spray water for several seconds (approximately 3 to 5 seconds), and then the inside of the mold is evacuated to reduce the amount of cooling water used. A method has been adopted in which the temperature of the mold is cooled to about 60 to 70° C. by also utilizing the latent heat of evaporation of water droplets attached to the mold.
この従来の金型冷却方法には、一般に合成樹脂発泡体製
造工場、例えばスチロール工場によっては金型冷却水の
管理即ち地下水または工業用水の確保が困難となってお
り、節水のために金型冷却に使用したドレーン水（６０
〜７０℃位）を排水せずに貯水槽に戻してクーリングタ
ンク等にて冷却し、金型冷却に最適温度３０〜３５′Ｃ
を確保する努力がなされて用いられているため、金型冷
却水の管理が難しくなっている。特に冷却水の温度が日
々外気によって或いは午前と午後とでも温度が異なって
くるので、その都度、冷却時間の調整を余儀なくされ作
業管理も煩雑で問題であった。This conventional mold cooling method generally has difficulties in managing mold cooling water, that is, securing underground water or industrial water, in some synthetic resin foam manufacturing factories, such as styrene factories, so mold cooling is used to save water. Drain water used for
~70°C) is returned to the water tank without draining and cooled in a cooling tank, etc., to the optimum temperature of 30 to 35'C for mold cooling.
As efforts are being made to ensure that mold cooling water is being used, it has become difficult to manage mold cooling water. In particular, since the temperature of the cooling water varies depending on the outside air every day or even in the morning and afternoon, the cooling time has to be adjusted each time, making work management complicated and problematic.
本発明は、これら従来の欠点を排除しようとするもので
、金型冷却水の管理が簡単で冷却水の温度変動があって
も冷却時間の対応が自動的にａｉｔになされ金型内を均
一に冷却することを可能とし、サイクルタイムを過不足
なく変動させて真空成形における金型冷却を有効に行い
うる方法を提供することを目的としたものである。The present invention aims to eliminate these conventional drawbacks, and the mold cooling water can be easily managed, and even if the cooling water temperature fluctuates, the cooling time is automatically adjusted to keep the inside of the mold uniform. The object of the present invention is to provide a method that can effectively cool a mold in vacuum forming by varying the cycle time just the right amount.
本発明は、合成樹脂発泡体を金型内で加熱及び冷却して
成形する真空成形方法において、金型内部に供給する冷
却水の入口温度を温度検出器によって検知し、該検知信
号をアナログ信号として入力してデジタル信号に変換す
るＡ／Ｄ変換器及びシーケンサ−を含むデータ処理部で
予じめ設定された演算式を用いて演算処理したのち、冷
却時間を設定するタイマーの設定時間を加減制御して金
型冷却を行うことを特徴とする発泡成形機における金型
冷却制御方法である。The present invention is a vacuum forming method in which a synthetic resin foam is molded by heating and cooling in a mold, in which the inlet temperature of cooling water supplied to the inside of the mold is detected by a temperature detector, and the detection signal is converted into an analog signal. The data processing unit, which includes an A/D converter and a sequencer, inputs the input as a digital signal and converts it into a digital signal.The data processing unit includes a sequencer and an A/D converter that uses a preset calculation formula to process the data, then adjusts or subtracts the setting time of the timer that sets the cooling time. This is a mold cooling control method in a foam molding machine, characterized in that mold cooling is controlled.
本発明の型内成形では、金型内を真空にして充填、加熱
及び冷却を行う際に冷却工程において、金型内部に供給
する冷却水の入口温度を温度検出器によって検知し、こ
の検知データをアナログ信号として入力してデジタル信
号に変換するＡ／Ｄ変換器及びシーケンサ−を含むデー
タ処理部で内部固定データ、即ち予じめ複数種類の演算
式を記憶させておき入力データで、この一つの演算式を
選択して用い演算処理してタイマーの設定時間を可変と
するモータを制御し、設定点に向かって移動させ冷却時
間の加減制御して運転し安全な状態で発泡成形作業を遂
行できるものである。In the in-mold molding of the present invention, when the inside of the mold is evacuated and filling, heating, and cooling are performed, the inlet temperature of the cooling water supplied to the inside of the mold is detected by a temperature detector in the cooling process, and the detected data is A data processing unit including an A/D converter and a sequencer inputs the signal as an analog signal and converts it into a digital signal. Select and process two calculation formulas to control the motor that changes the timer setting time, move it toward the set point, control the cooling time, and perform foam molding work in a safe state. It is possible.
本発明の実施態様を第１図例で説明すると、キャビ側金
型ｌとコア側金型２とで成形品３を成形するのに金型内
を真空にしてフィーダ４からビーズをクランキングを生
じないように充填したのち、またはクラッキング充填し
たのち両金型の蒸気管５．６より温度１１０〜１１５℃
程度の蒸気を供給し加熱して発泡成形する。次で両金型
の冷却水管７．８から冷却水弁７□、８．の開閉で温度
３０〜３５℃程度の冷却水を供給し、スプレ−ノズル７
□日□で噴射し、金型１，２に付着した水滴で冷却する
ものであるが、冷却水の入口温度を冷却水管７．８に設
けた温度検出器１７．１８によって検知し、該検知信号
をアナログ信号として入力してデジタル信号に変換する
Ａ／Ｄ変換器１５及びシーケンサ−１６を含むコンピュ
ータユニットのデータ処理部２０で所定の演算式を用い
て演算処理したのち、冷却時間を設定するタイマー１９
の設定時間を自動制御して金型冷却を行えるようになっ
ていて金型に水滴が付着し、その水滴の蒸発潜熱で金型
を均一に冷却（金型温度６０〜７０℃に冷却）ができる
。The embodiment of the present invention will be explained with reference to an example in FIG. 1. To mold a molded product 3 using a cavity side mold 1 and a core side mold 2, the inside of the mold is evacuated and beads are cranked from a feeder 4. After filling to prevent cracking or cracking, the temperature is 110 to 115℃ from the steam pipes 5.6 of both molds.
A certain amount of steam is supplied and heated to perform foam molding. Next, from the cooling water pipes 7.8 of both molds to the cooling water valves 7□, 8. Cooling water at a temperature of about 30 to 35 degrees Celsius is supplied by opening and closing the spray nozzle 7.
The inlet temperature of the cooling water is detected by the temperature detector 17.18 installed in the cooling water pipe 7.8, and the temperature of the cooling water is detected by the temperature detector 17.18 installed in the cooling water pipe 7.8. The data processing section 20 of the computer unit, which includes an A/D converter 15 that inputs the signal as an analog signal and converts it into a digital signal, and a sequencer 16 performs calculation processing using a predetermined calculation formula, and then sets a cooling time. timer 19
The mold can be cooled by automatically controlling the set time, so water droplets adhere to the mold, and the latent heat of evaporation of the water droplets cools the mold uniformly (cooling the mold temperature to 60-70℃). can.
なお、加熱時に蒸気供給側の反対側から排気することに
より、金型内の空気とドレーンを強制的に早く排出させ
るために両金型のドレーン弁９゜１０及び真空側弁１１
．排水側弁１２を操作して真空装置１３及び排水装Ｗ１
４で効率よく加熱冷却工程が達成することができると共
に、冷却時にも真空を利用することにより真空冷却を行
えばよく、この場合成形品３の含水率をも数％として効
率のよい冷却が可能となる。In addition, in order to forcefully and quickly exhaust the air and drain inside the mold by exhausting from the side opposite to the steam supply side during heating, the drain valves 9゜10 and the vacuum side valve 11 of both molds are installed.
．． By operating the drain side valve 12, the vacuum device 13 and the drain device W1 are removed.
The heating and cooling process can be achieved efficiently in step 4, and vacuum cooling can be performed by using vacuum during cooling, and in this case, efficient cooling can be achieved by reducing the moisture content of molded product 3 to a few percent. becomes.
この場合、金型内成形の加熱、冷却を制御する方法とし
て、加熱工程で金型の温度ないし蒸気室の温度を熱電対
を用いて測定し、蒸気弁５．６を開閉して加熱を制御す
ることや、冷却工程で金型温度、ドレーン温度を熱電対
の検出器を用いて測定し、冷却水管７．８にある冷却水
弁７＋、８１を開閉して冷却を制御することも選んでで
きる。In this case, as a method of controlling heating and cooling of molding in the mold, the temperature of the mold or the temperature of the steam chamber is measured using a thermocouple during the heating process, and the heating is controlled by opening and closing the steam valve 5.6. Alternatively, the mold temperature and drain temperature may be measured using thermocouple detectors during the cooling process, and cooling may be controlled by opening and closing the cooling water valves 7+ and 81 in the cooling water pipes 7.8. can.
また、この冷却には予冷工程或いは放冷工程を冷却サイ
クル組み入れて次サイクルでの蒸気量の節約をはかると
共に、金型壁等に付着したドレーンの排出に役立つよう
にすることも考慮される。It is also considered to incorporate a pre-cooling step or a cooling step into the cooling cycle in order to save the amount of steam in the next cycle and also to help discharge drains adhering to the mold walls and the like.
図中、２１は設定部で演算式を複数通り記憶させておき
、冷却水温度によ、って使用する演算式、例えば水冷時
間を設定しであるタイマーの値をＴＩＭＩ （秒）と
する。金型等によって決まる係数をＫとし、かつ測定温
度をＴ （’Ｃ） 、求める水冷時間をＴＩＭ （秒）
とする。基準温度を３５℃にする。In the figure, reference numeral 21 denotes a setting unit that stores a plurality of arithmetic expressions, and sets the arithmetic expression to be used depending on the cooling water temperature, for example, the water cooling time, and sets the value of a timer as TIMI (seconds). Let the coefficient determined by the mold etc. be K, the measured temperature be T ('C), and the required water cooling time TIM (seconds).
shall be. Set the reference temperature to 35°C.
最初に比較によってＴが３５℃より上か下かを求める。First, by comparison, determine whether T is above or below 35°C.
７１３５℃
Ｔ〈３５℃
（負の数の処理のできるシステムを使うときは■式のみ
で可能）
を用いてタイマーＩ９を何秒延ばすかを決定するために
用いられるものである。なお、前記データ処理部２０で
は、メモリーとなるフィードレート設定回路と指令パル
スを発生するパルス発生回路と、フィードハックパルス
を積算するレジスタと、指令パルスとフィードバックパ
ルスとの差を示すレジスタとの組合せでサンプリングし
て演算処理できるようにするものが用いられる。This is used to determine how many seconds to extend the timer I9 using 7135°C T<35°C (when using a system that can process negative numbers, only formula (2) can be used). The data processing unit 20 has a combination of a feed rate setting circuit that serves as a memory, a pulse generation circuit that generates command pulses, a register that integrates feed hack pulses, and a register that indicates the difference between the command pulse and the feedback pulse. A device that allows sampling and calculation processing is used.
本発明は、冷却水によって金型冷却の際に冷却水の入口
温度を温度検出器によって検知し、該検知信号をアナロ
グ信号として入力してデジタル信号に変換するＡ／Ｄ変
換器及びシーケンサ−を含むデータ処理部で予じめ設定
された演算式を用いて演算処理したのち、冷却時間を設
定するタイマーの設定時間を加減制御して金型冷却を行
うことにより、冷却水の温度変動があっても冷却時間の
調整を自動的に行って金型に均一に付着した水滴で金型
をむらなく冷却させることが可能となり、必要以上に冷
却時間も長くする必要もなくサイクルタイムの大幅な短
縮化ができるほか、安定した成形作業を効率よく行うこ
とができるし、運転管理も簡便である等の効果がある。The present invention includes an A/D converter and a sequencer that detect the inlet temperature of the cooling water using a temperature detector when cooling a mold using the cooling water, input the detection signal as an analog signal, and convert it into a digital signal. After performing calculation processing using a preset calculation formula in the data processing section that includes the mold, the mold is cooled by controlling the setting time of the timer that sets the cooling time, thereby eliminating fluctuations in the temperature of the cooling water. The cooling time can be automatically adjusted to cool the mold evenly with water droplets evenly attached to the mold, and there is no need to make the cooling time longer than necessary, significantly shortening the cycle time. In addition to being able to perform stable and efficient molding operations, operation management is also simple.
第１図は本発明方法の系統説明図、第２図は従来法の系
統説明図である。
１．２・・・金型、３・・・成形品、４・・・フィーダ
、５．６・・・蒸気管、７．８・・・冷却管、７．．８
．・・・冷却水弁、９．１０・・・ドレーン弁、１１・
・・真空側弁、１２・・・排水側弁、１３・・・真空装
置、１４・・・排水装置、１５・・・Ａ／Ｄ変換器、Ｉ
６・・・シーケンサ−１７，１８・・・温度検出器、１
９・・・タイマー、２゜・・・データ処理部。
２０゜FIG. 1 is a system explanatory diagram of the method of the present invention, and FIG. 2 is a system explanatory diagram of the conventional method. 1.2... Mold, 3... Molded product, 4... Feeder, 5.6... Steam pipe, 7.8... Cooling pipe, 7. ．． 8
．． ...Cooling water valve, 9.10...Drain valve, 11.
...Vacuum side valve, 12...Drain side valve, 13...Vacuum device, 14...Drainage device, 15...A/D converter, I
6...Sequencer-17,18...Temperature detector, 1
9...Timer, 2°...Data processing section. 20°
Claims (1)
する真空成形方法において、金型内部に供給する冷却水
の入口温度を温度検出器によって検知し、該検知信号を
アナログ信号として入力してデジタル信号に変換するＡ
／Ｄ変換器及びシーケンサーを含むデータ処理部で予じ
め設定された演算式を用いて演算処理したのち、冷却時
間を設定するタイマーの設定時間を加減制御して金型冷
却を行うことを特徴とする発泡成形機における金型冷却
制御方法。(1) In a vacuum forming method in which synthetic resin foam is molded by heating and cooling in a mold, the inlet temperature of the cooling water supplied to the inside of the mold is detected by a temperature detector, and the detection signal is converted into an analog signal. A to input and convert to digital signal
The feature is that the mold is cooled by controlling the setting time of the timer that sets the cooling time after performing calculation processing using a preset calculation formula in the data processing unit including the /D converter and sequencer. Mold cooling control method for foam molding machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2053563A JPH03256731A (en) | 1990-03-07 | 1990-03-07 | Mold cooling control method for foam molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2053563A JPH03256731A (en) | 1990-03-07 | 1990-03-07 | Mold cooling control method for foam molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03256731A true JPH03256731A (en) | 1991-11-15 |
Family
ID=12946289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2053563A Pending JPH03256731A (en) | 1990-03-07 | 1990-03-07 | Mold cooling control method for foam molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03256731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001076843A1 (en) * | 2000-03-31 | 2001-10-18 | Woo Won Lee | Molding device for manufacturing midsole and insole of shoes |
-
1990
- 1990-03-07 JP JP2053563A patent/JPH03256731A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001076843A1 (en) * | 2000-03-31 | 2001-10-18 | Woo Won Lee | Molding device for manufacturing midsole and insole of shoes |
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