JPH01198313A - Apparatus for injecting foamed urethane - Google Patents
Apparatus for injecting foamed urethaneInfo
- Publication number
- JPH01198313A JPH01198313A JP2192288A JP2192288A JPH01198313A JP H01198313 A JPH01198313 A JP H01198313A JP 2192288 A JP2192288 A JP 2192288A JP 2192288 A JP2192288 A JP 2192288A JP H01198313 A JPH01198313 A JP H01198313A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- injection
- metering pump
- low pressure
- injection head
- 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.)
- Granted
Links
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 69
- 239000007924 injection Substances 0.000 claims abstract description 69
- 239000011550 stock solution Substances 0.000 claims description 14
- 238000005187 foaming Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 101100008047 Caenorhabditis elegans cut-3 gene Proteins 0.000 description 1
- 101100008048 Caenorhabditis elegans cut-4 gene Proteins 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は発泡ウレタン注入装置に係り、特に注入ヘッド
からの吐出量を一定に保持し、かつ装置の異常監視も行
なえる高精度の注入装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a foamed urethane injection device, and particularly to a high-precision injection device that can maintain a constant discharge amount from an injection head and also monitor abnormalities in the device. Regarding.
従来の発泡ウレタン注入装置は、少なくとも２種の原液
をそれぞれ計量ポンプ及び高低圧切替弁を介して、高圧
噴射ノズルを具備した注入ヘッドで混合吐出するものが
一般的である。しかし、実際に注入された成形品が設定
値どうり注入されたか否か判断することが困難であり、
最近では注入量異常を感知するため、例えば特開昭５９
−２６０７１３号公報は、上記注入ヘッドからの戻り液
を圧力センサーで感知することで注入量不足品を自動的
に発見できる装置を提案している。A conventional foamed urethane injection device generally mixes and discharges at least two kinds of stock solutions with an injection head equipped with a high-pressure injection nozzle through a metering pump and a high-low pressure switching valve. However, it is difficult to judge whether or not the molded product was actually injected according to the set value.
Recently, in order to detect abnormal injection amount, for example,
Japanese Patent No. 260713 proposes a device that can automatically detect a product with insufficient injection amount by sensing the liquid returned from the injection head with a pressure sensor.
上記従来技術では、注入ヘッドの作動不良等による注入
量異常は容易に感知されるが、注入精度自体の向上につ
いては配慮がされていない。すなまるが、実際には配管
抵抗や原液温度及び吐出圧力等の発泡条件の変動により
計量ポンプの吐出精度より劣る。また、計量ポンプや高
低圧切替弁からの原液洩れ等があると吐出精度はさらに
低下するという問題があり、通常はこのような吐′出流
量のバラツキを考慮して必要量よりも３％程度余分に注
入することが多い。In the above-mentioned conventional technology, an abnormal injection amount due to malfunction of the injection head or the like is easily detected, but no consideration is given to improving the injection accuracy itself. However, in reality, the discharge accuracy is inferior to that of a metering pump due to fluctuations in foaming conditions such as piping resistance, stock solution temperature, and discharge pressure. In addition, there is a problem that the discharge accuracy will further deteriorate if there is a leakage of raw liquid from the metering pump or high/low pressure switching valve, and normally, taking into account such variations in the discharge flow rate, the amount is about 3% lower than the required amount. Extra injections are often required.
本発明の目的は上記発泡条件等の変動に関係なく注入ヘ
ッドからの吐出精度を大幅に向上させた発泡ウレタン注
入装置を提供することにある。An object of the present invention is to provide a foamed urethane injection device that greatly improves the accuracy of ejection from an injection head regardless of variations in the above-mentioned foaming conditions.
上記目的は、少なくとも２種の原液をそれぞれ計量ポン
プ及び高低圧切替弁を介して、高圧噴射ノズルを具備し
た注入ヘッドで混合吐出する発泡ウレタン注入装置にお
いて、上記高低圧切替弁と注入ヘットとの間に具備した
流量感知部の出力により上記計量ポンプの吐出流量を制
御する流量制御部を設けることにより達成される。The above object is to provide a foamed urethane injection device that mixes and discharges at least two types of stock solutions through a metering pump and a high/low pressure switching valve, respectively, from an injection head equipped with a high pressure injection nozzle. This is achieved by providing a flow rate control section that controls the discharge flow rate of the metering pump based on the output of a flow rate sensing section provided therebetween.
計量ポンプにより送られた原液は高低圧切替弁を介して
高圧循環となり、上記流量感知部で実際の吐出流量を感
知しながら注入ヘッドより吐出される。ここで感知し、
た吐出流量が設定値をはずｊｌて変動した場合、上記流
量制御部により瞬時に上記計量ポンプの吐出流量を自動
変換し、注入ヘットからの吐出流量を常に設定値どうり
二定に保持するものである。The stock solution sent by the metering pump is circulated at high pressure via the high/low pressure switching valve, and is discharged from the injection head while the actual discharge flow rate is detected by the flow rate sensor. sense here,
If the discharge flow rate deviates from the set value, the flow rate controller instantly automatically converts the discharge flow rate of the metering pump to maintain the discharge flow rate from the injection head at a constant value equal to the set value. It is.
以下、本発明の一実施例を第１図により説明する。第１
図は本発明の流量制御部を備えた発泡ウレタン注入装置
のブロック図である。なお、２種の原液（ポリオール側
とイソシアネート側）を混合する装置の内、一方の原液
側循環経路は省略した。また、図中の矢印は原液及び信
号の流れを示す。An embodiment of the present invention will be described below with reference to FIG. 1st
The figure is a block diagram of a foamed urethane injection device equipped with a flow rate control section of the present invention. In addition, among the devices for mixing two types of stock solutions (polyol side and isocyanate side), one stock solution side circulation path was omitted. Moreover, the arrows in the figure indicate the flow of the stock solution and the signal.
図において、１は原液タンクであり、計量ポンプ２より
送り込まれた原液は高低圧切替弁５を介して高圧循環と
なり、流量センサ６（流量感知部）を通過した後、高圧
噴射ノズル７ａの開閉により（開閉は油圧装置で行なう
・・・図示せず）注入ヘッド７で２種の原液が１００
ｋｇｆ／ ｃ＋＃前後の高圧で撹拌混合され製品１１に
注入される。なお、循環時は絞り弁９で注入時とほぼ同
じ圧力に調整しておくと注入が安定し好ましい。さらに
装置の故障等で圧力が異常に変動した場合は、低圧カッ
ト３又は高圧カット４により自動的に注入装置を停止さ
せる構成になっている。また、注入量は成形する製品１
１及び発泡治具１２の温度（通常は３０°Ｃ〜４５℃に
予熱して注入する）により異なるが、本実施例では、壁
温センサ１０で注入直前の製品１１及び発泡治具１２の
予熱温度を感知し、制御部１３内に組み込まれたシーケ
ンサ１３ａにより適正注入量（注入タイム）を算出して
注入０Ｎ−ＯＦＦ、すなわち高圧噴射ノズル７ａの開閉
を自動的に制御するものである。In the figure, reference numeral 1 denotes a stock solution tank, and the stock solution sent from a metering pump 2 is circulated under high pressure via a high/low pressure switching valve 5, and after passing through a flow rate sensor 6 (flow sensing section), the high pressure injection nozzle 7a is opened/closed. (Opening and closing is done by a hydraulic device...not shown) Two kinds of stock solutions are injected into the injection head 7 at 100 ml.
The mixture is stirred and mixed at a high pressure of around kgf/c+# and is injected into the product 11. Note that during circulation, it is preferable to adjust the pressure to approximately the same pressure as during injection using the throttle valve 9 to stabilize injection. Furthermore, if the pressure fluctuates abnormally due to a malfunction of the device, the injection device is automatically stopped by a low pressure cut 3 or a high pressure cut 4. In addition, the injection amount is the product 1 to be molded.
1 and the foaming jig 12 (usually preheated to 30°C to 45°C before injection), in this embodiment, the wall temperature sensor 10 preheats the product 11 and the foaming jig 12 immediately before injection. The system senses the temperature, calculates an appropriate injection amount (injection time) using a sequencer 13a built into the control unit 13, and automatically controls injection ON-OFF, that is, opening and closing of the high-pressure injection nozzle 7a.
一方１本発明では上記流量センサ６の出力を制御部１３
に送り、高圧循環時及び注入時の実際の吐出流量を計測
し、シーケンサ１３ａにより０．５秒ごとに誤差演算を
行ない、流量設定値に対する誤差分をその都度流量変換
するものである。流量変換はシーケンサ１’３ａからの
信号により、流量変換装置１３ｂ（インバータ）で計量
ポンプ２を運転するモータ２ａの回転数を制御すること
により行なう。On the other hand, in one aspect of the present invention, the output of the flow rate sensor 6 is controlled by the control section 13.
The actual discharge flow rate during high-pressure circulation and injection is measured, and the sequencer 13a calculates an error every 0.5 seconds, and converts the error with respect to the flow rate setting value each time. The flow rate conversion is performed by controlling the rotational speed of the motor 2a that operates the metering pump 2 using a flow rate conversion device 13b (inverter) based on a signal from the sequencer 1'3a.
なお、上記流量センサ６は日東精工製ＲＨＰ２型流量計
等が好ましく、高低圧力切替弁５と注入ヘッド７との間
に、好ましくは注入ヘッド７の直前に配設するのが良い
。The flow rate sensor 6 is preferably a Nitto Seiko RHP2 type flowmeter or the like, and is preferably disposed between the high/low pressure switching valve 5 and the injection head 7, preferably just before the injection head 7.
さらに、注入ヘッド７からの戻り配管に圧力センサ８を
配設した。循環時の戻り配管内圧力は絞り弁９により１
００ ｋｇｆ／ ｃａ前後に調整されているが、注入時
では原液の流れが止まり圧力はほぼ０に近くなる。した
がって、この圧力変化を上記圧力センサ８で感知するこ
とにより、高圧噴射ノズルの実際の開閉時間注入時間及
び注入時に戻り液がないかを監視し、異常の湯量は、注
入量不良品と判断しその信号が制御部１３に送られ自動
的に注入装置を停止させるものである。Furthermore, a pressure sensor 8 was installed in the return pipe from the injection head 7. The pressure inside the return pipe during circulation is reduced to 1 by the throttle valve 9.
The pressure is adjusted to around 0.00 kgf/ca, but during injection, the flow of the stock solution stops and the pressure becomes close to 0. Therefore, by sensing this pressure change with the pressure sensor 8, the actual opening/closing time of the high-pressure injection nozzle, the injection time, and whether there is any liquid returning during injection are monitored, and an abnormal amount of hot water is determined to be a product with a defective injection amount. The signal is sent to the control unit 13 to automatically stop the injection device.
本実施例によれば製品や発泡治具の予熱温度に対応した
最適注入量に制御することができ、かつ注入時の吐出流
量を常に設定値どうり一定に保持することができるので
注入精度が大幅に向上し、注入量の無駄がなくなると共
に成形した製品の品質向上に効果がある。また、圧力セ
ンサで注入異常を監視することで実際に注入された製品
が設定値どうり注入されたか否かを感知することができ
るので、注入不良品を自動的に発見できる効果がある。According to this embodiment, it is possible to control the injection amount to the optimum amount corresponding to the preheating temperature of the product and the foaming jig, and the discharge flow rate during injection can always be kept constant to the set value, so injection accuracy can be improved. This has the effect of significantly improving the amount of injection, eliminating wasted injection volume, and improving the quality of molded products. Furthermore, by monitoring injection abnormalities with a pressure sensor, it is possible to sense whether or not the actually injected product has been injected according to the set value, which has the effect of automatically discovering defective injection products.
本発明によれば、配管抵抗や原液温度及び吐出圧力等の
発泡条件の変動に関係なく注入ヘッドからの吐出流量は
常に設定置どうり一定となるので、大幅に吐出精度を向
上できる。また、従来吐出流量のバラツキを考慮し必要
量よりも３％程度余分に注入していたものが、その必要
がなくなり約３％注入量を削減できると共に、信頼性を
大幅に改善できる効果がある。According to the present invention, the discharge flow rate from the injection head is always constant at the set position regardless of fluctuations in foaming conditions such as piping resistance, stock solution temperature, and discharge pressure, so that discharge accuracy can be greatly improved. In addition, in the past, about 3% more than the required amount was injected to account for variations in the discharge flow rate, but this is no longer necessary and the injection amount can be reduced by about 3%, and reliability can be significantly improved. .
第１図は本発明の流量制御部を備えた発泡ウレタン注入
装置のブロック図である。
１・原液タンク、２・・計量ポンプ、２ａ・・・モータ
ー、３・・・低圧カット、４・・高圧カット、５・・・
高低圧力切替弁、６・・流量センサ、７・・・注入ヘッ
ド、７ａ・・・高圧噴射ノズル、８・圧力センサ、９・
・絞り弁、１０・・壁温センサ、１１・・・製品、１２
・・・発泡治具、１３・・制御部、１３ａ・・シーケン
サ、１３ｂ・・・流量変換装置。
代理人弁理士 小 川 勝 男FIG. 1 is a block diagram of a foamed urethane injection device equipped with a flow rate control section of the present invention. 1. Stock solution tank, 2.. Metering pump, 2a.. Motor, 3.. Low pressure cut, 4.. High pressure cut, 5..
High/low pressure switching valve, 6.Flow rate sensor, 7.Injection head, 7a.High pressure injection nozzle, 8.Pressure sensor, 9.
- Throttle valve, 10... Wall temperature sensor, 11... Product, 12
... Foaming jig, 13.. Control section, 13a.. Sequencer, 13b.. Flow rate conversion device. Representative Patent Attorney Katsuo Ogawa
Claims (1)
低圧切替弁を介して、高圧噴射ノズルを具備した注入ヘ
ッドで混合吐出する発泡ウレタン注入装置において、上
記高低圧切替弁と注入ヘッドとの間に具備した流量感知
部の出力により上記計量ポンプの吐出流量を制御する流
量制御部を設けたことを特徴とする発泡ウレタン注入装
置。1. In a foamed urethane injection device that mixes and discharges at least two types of stock solutions from an injection head equipped with a high-pressure injection nozzle through a metering pump and a high-low pressure switching valve, there is a space between the high-low pressure switching valve and the injection head. A foamed urethane injection device comprising a flow rate control section that controls the discharge flow rate of the metering pump based on the output of the included flow rate sensing section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2192288A JPH0796234B2 (en) | 1988-02-03 | 1988-02-03 | Urethane foam injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2192288A JPH0796234B2 (en) | 1988-02-03 | 1988-02-03 | Urethane foam injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01198313A true JPH01198313A (en) | 1989-08-09 |
| JPH0796234B2 JPH0796234B2 (en) | 1995-10-18 |
Family
ID=12068564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2192288A Expired - Fee Related JPH0796234B2 (en) | 1988-02-03 | 1988-02-03 | Urethane foam injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796234B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5709892A (en) * | 1994-07-21 | 1998-01-20 | Woodbridge Foam Corporation | System for producing a foamed isocyanate-based polymer |
| WO1998032580A1 (en) * | 1997-01-23 | 1998-07-30 | Sunstar Giken Kabushiki Kaisha | Two-pack urethane foam composition, and two-pack urethane foam composition packing apparatus and method |
| JP2013544681A (en) * | 2010-11-03 | 2013-12-19 | バイエル・インテレクチュアル・プロパティ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Manufacturing method of foam molded product |
| CN116176008A (en) * | 2023-04-25 | 2023-05-30 | 北京维盛复合材料有限公司 | Raw material process flow control system |
-
1988
- 1988-02-03 JP JP2192288A patent/JPH0796234B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5709892A (en) * | 1994-07-21 | 1998-01-20 | Woodbridge Foam Corporation | System for producing a foamed isocyanate-based polymer |
| WO1998032580A1 (en) * | 1997-01-23 | 1998-07-30 | Sunstar Giken Kabushiki Kaisha | Two-pack urethane foam composition, and two-pack urethane foam composition packing apparatus and method |
| US6337355B1 (en) | 1997-01-23 | 2002-01-08 | Sunstar Giken Kabushiki Kaisha | Two-pack urethane foam composition |
| US6866804B2 (en) | 1997-01-23 | 2005-03-15 | Sunstar Suisse Sa | Two-pack urethane foam composition, and two-pack urethane foam composition injecting apparatus and method |
| US7459107B2 (en) | 1997-01-23 | 2008-12-02 | Sunstar Suisse Sa | Two-pack urethane foam composition, and two-pack urethane foam composition injecting apparatus and method |
| JP2013544681A (en) * | 2010-11-03 | 2013-12-19 | バイエル・インテレクチュアル・プロパティ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Manufacturing method of foam molded product |
| CN116176008A (en) * | 2023-04-25 | 2023-05-30 | 北京维盛复合材料有限公司 | Raw material process flow control system |
| CN116176008B (en) * | 2023-04-25 | 2023-08-22 | 北京维盛复合材料有限公司 | Raw material process flow control system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0796234B2 (en) | 1995-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5494112A (en) | System for introduction of concentrated liquid chemical foamant into a water stream for fighting fires | |
| CA2242531C (en) | Gas fuel supply piping system | |
| US7278776B2 (en) | Apparatus and method for injecting a liquid dye into a polymer melt | |
| JP4361620B2 (en) | Gas container filling method | |
| US5590686A (en) | Liquid delivery systems | |
| WO1990004479A1 (en) | Working fluid temperature abnormality alarm apparatus of electric discharge machine | |
| JPH01198313A (en) | Apparatus for injecting foamed urethane | |
| JP4237473B2 (en) | Chemical injection method and apparatus | |
| US5411685A (en) | Gas control unit and process for gas-assisted injection molding | |
| JPH09156697A (en) | Flow rate control type charging method | |
| JP3317778B2 (en) | Automatic measuring method of gas pressure of accumulator | |
| US5957171A (en) | Pressure filling method and apparatus for liquid | |
| TWI813786B (en) | mixing device | |
| CA1267574A (en) | Method and apparatus for controlling the gas content of dispensed hot melt thermoplastic adhesive foam | |
| JP2003251672A (en) | Supercritical fluid injecting apparatus | |
| JP3379800B2 (en) | High pressure urethane injection device | |
| JP2001239567A (en) | Method for controlling motor driven injection molding machine | |
| JP2001150485A (en) | Mechanism for adjusting flow rate of supercritical fluid | |
| JPH0995394A (en) | Pressure type packing apparatus | |
| JP2552702B2 (en) | Dissolved gas concentration adjusting device for coolant for nuclear power generation | |
| KR100971240B1 (en) | Gas density control apparatus for idle rotation prevention of booster | |
| SU1239520A1 (en) | Device for metered dispensing of liquid | |
| JPH1110647A (en) | Pressurizing and pressure reducing apparatus for inside of mold, and method for injection molding | |
| JP2000006907A (en) | Filling method of liquid object and apparatus therefor | |
| KR100328388B1 (en) | The temperature-controlling arrangement for chemical storage tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |