JPS6357207A - Method of wash purging mixing part and its equipment in reaction injection molding machine - Google Patents
Method of wash purging mixing part and its equipment in reaction injection molding machineInfo
- Publication number
- JPS6357207A JPS6357207A JP61202788A JP20278886A JPS6357207A JP S6357207 A JPS6357207 A JP S6357207A JP 61202788 A JP61202788 A JP 61202788A JP 20278886 A JP20278886 A JP 20278886A JP S6357207 A JPS6357207 A JP S6357207A
- Authority
- JP
- Japan
- Prior art keywords
- caprolactam
- injection molding
- mixing section
- mixing part
- tank
- 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
- 238000010107 reaction injection moulding Methods 0.000 title claims abstract description 20
- 238000010926 purge Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 9
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000001746 injection moulding Methods 0.000 claims abstract description 14
- 229920005862 polyol Polymers 0.000 claims abstract description 5
- 150000003077 polyols Chemical class 0.000 claims abstract description 5
- 239000003054 catalyst Substances 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims abstract 8
- 239000007788 liquid Substances 0.000 claims description 56
- 238000004140 cleaning Methods 0.000 claims description 22
- 239000011261 inert gas Substances 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/10—Maintenance of mixers
- B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
- B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、反応射出成形機の混合部の洗浄パージの方法
およびその装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for cleaning and purging a mixing section of a reaction injection molding machine.
（従来の技術）
反応射出成形とくにポリアミド系反応射出成形において
は、主触媒とε−カプロラクタムを成分とするＡ液およ
びポリオールとε−カプロラクタムを成分とするＢ液と
をキャスティングして成形する。従来のこの反応射出機
のシステム概念図を第２図に示す。以下、これに基づい
て従来技術について説明する。(Prior Art) In reaction injection molding, particularly polyamide-based reaction injection molding, molding is carried out by casting liquid A containing a main catalyst and ε-caprolactam, and liquid B containing a polyol and ε-caprolactam. A conceptual diagram of the system of this conventional reaction injection machine is shown in FIG. Hereinafter, the conventional technology will be explained based on this.
Ａ液１４が原料用タンク１に投入され、インペラ３によ
り攪拌され、Ｂ液１５が原料用タンク１０に投入されて
いる。この両タンクは、温度調節体２により約９０℃に
保温されている。A liquid 14 is put into the raw material tank 1 and stirred by the impeller 3, and a B liquid 15 is put into the raw material tank 10. Both tanks are kept at about 90° C. by a temperature regulator 2.
温度計１２は温度調節のための温度センサーである。ま
たバルブブロック１３および混合部８も温度調節体によ
り常時約８０℃に保温されている。The thermometer 12 is a temperature sensor for temperature adjustment. Further, the valve block 13 and the mixing section 8 are also kept at a constant temperature of about 80° C. by a temperature regulator.
バルブ６が図示した状態において原料用タンクバルブ６
を反時計回りの方向へ９０°回転し、プ混合部８に導か
れ混合されて吐出ロアより成形型に射出される。In the state where the valve 6 is shown, the raw material tank valve 6
The mixture is rotated 90° counterclockwise, guided to the mixing section 8, mixed, and injected into the mold from the discharge lower.
才た各タンクは不活性ガス用ボンベ１１より供給される
不活性ガスにより加圧されている。Each tank is pressurized with inert gas supplied from an inert gas cylinder 11.
以上のような反応射出成形機において、Ａ液とＢ液は混
合されると、約３分で重合反応が始まｐ固化する性質を
有する。そこでＡ液とＢ液が混合される混合部８は、射
出成形特以外には洗浄パージする必要がある。従来の洗
浄パージ方法としては、バルブ９を開き、不活性ガス用
ボンベ１１より供給される不活性ガスにより、混合部８
中のＡ液およびＢ液を押し流す方法がとられていた。In the reaction injection molding machine as described above, when liquids A and B are mixed, a polymerization reaction starts in about 3 minutes and the mixture becomes solidified. Therefore, the mixing section 8 where liquid A and liquid B are mixed needs to be cleaned and purged except for injection molding. In the conventional cleaning and purging method, the valve 9 is opened and the mixing section 8 is flushed with inert gas supplied from the inert gas cylinder 11.
A method was used in which the A and B liquids inside were washed away.
（発明が解決しようとする問題点）
次に混合部８の構造を第３図および第４図（ａ）（ｂ）
に示す。第３図は断面図であり、第４図は混合部の内部
の部品であるチップの平面図であシ、（ａ）がチップ２
１ 、（１））がチップ２２のものである。(Problems to be Solved by the Invention) Next, the structure of the mixing section 8 is shown in FIGS. 3 and 4 (a) and (b).
Shown below. FIG. 3 is a cross-sectional view, and FIG. 4 is a plan view of the chip, which is an internal part of the mixing section.
1, (1)) is that of chip 22.
これかられかるように混合部８内では、複雑な形状をし
たチップ２１および２２が何枚も重ねであるため不活性
ガスのみではＡ液およびＢ液を十分に押し流すことがで
きず、チップ２１および２２の端に少量ずつＡ液および
Ｂ液が滞留し混合部８が閉塞するという問題が生ずる。As you will see, in the mixing section 8, the chips 21 and 22 with complicated shapes are stacked one on top of the other, so the inert gas alone cannot sufficiently sweep away the A liquid and the B liquid. A problem arises in that liquid A and liquid B accumulate little by little at the end of the pipe 22, and the mixing section 8 becomes clogged.
本発明はこの問題点を解決するためのものである。The present invention is intended to solve this problem.
（問題点を解決するための手段）
第一の発明の反応射出成形機における混合部の洗浄パー
ジ方法は、主触媒とε−カプロラクタムを成分とするＡ
液、ポリオールとε−カプロラクタムを成分とするＢ液
、および洗浄液であるε−カプロラクタムをそれぞれ別
のタンクに投入し、これら各タンクに不活性ガスを満た
し、Ａ液とＢ液を該ガス圧および送液装置により吐出口
を先端に配した混合部に送り、この混合部で混合後、該
吐出口より成形型に射出し成形する反応射出成形におい
て、この射出成形の工程と工程の間、該ε−カプロラク
タムを不活性ガス圧により該混合部内に送り、該混合部
内に残留するＡ液およびＢ液を該吐出口より押し流し、
該混合部内をε−カプロラクタムに置換することを特徴
とする。(Means for Solving the Problems) A method for cleaning and purging a mixing section in a reaction injection molding machine according to the first invention is a method for cleaning and purging a mixing section in a reaction injection molding machine according to the first invention.
Liquid, B liquid containing polyol and ε-caprolactam as components, and ε-caprolactam which is a cleaning liquid are respectively put into separate tanks, each tank is filled with inert gas, and A liquid and B liquid are heated to the gas pressure and ε-caprolactam. In reaction injection molding, in which a liquid is sent to a mixing section with a discharge port at the tip, mixed in this mixing section, and then injected from the discharge port into a mold, between the steps of injection molding, Sending ε-caprolactam into the mixing section by inert gas pressure, flushing out liquids A and B remaining in the mixing section from the discharge port,
It is characterized in that the inside of the mixing part is replaced with ε-caprolactam.
第二の発明の反応射出成形機における混合部の洗浄パー
ジ装置は、射出成形の原料液の入ったタンクから、これ
ら原料液を混合する混合部に送り、この混合液を該混合
部の先端に配した吐出口より成形型に射出し成形する反
応射出成形機における混合部の洗浄パージ装置が、混合
部へ配管されたε−カプロラクタムの入った洗浄液用タ
ンク、このタンクに満たす不活性ガスのボンベ、そして
洗浄液用タンクと混合部の中間に位置する該ε−カプロ
ラクタムを混合部へ導く切換え弁であるロータリーバル
ブおよび該ε−カプロラクタムを該ロータリーバルブに
導く切換え弁とより構成されることを特徴とする。The cleaning and purging device for the mixing section in the reaction injection molding machine of the second invention sends the raw material liquids for injection molding from the tank containing them to the mixing section where these raw material liquids are mixed, and supplies this mixed liquid to the tip of the mixing section. In a reaction injection molding machine that performs injection molding into a mold through a discharge port arranged in the machine, the cleaning and purging device for the mixing section cleans the cleaning liquid tank containing ε-caprolactam that is piped to the mixing section, and the inert gas cylinder that fills this tank. and a rotary valve located between the cleaning liquid tank and the mixing section, which is a switching valve for guiding the ε-caprolactam to the mixing section, and a switching valve for guiding the ε-caprolactam to the rotary valve. do.
第一の発明の反応゛射出成形機における混合部の洗浄パ
ージ方法において、原料用タンクおよび洗浄液用タンク
および混合部並びに混合部までのラインは約９０℃に温
度調節されており、射出成形の工程と工程の間で、２分
間以上の停止のある場合には、該成形機の混合部に、洗
浄液用タンクからε−カプロラクタムが該タンクに満た
された圧力約４．５に−の不活性ガスにより送液され、
該混合部内に残留するＡ液およびＢ液の混合物を押し流
し、該混合部内をε−カプロラクタムで置換する。ε−
カプロラクタムは約９０℃に長時間放置しても伺ら問題
はない。In the reaction method of the first invention for cleaning and purging a mixing section in an injection molding machine, the temperature of the raw material tank, the cleaning liquid tank, the mixing section, and the line up to the mixing section is adjusted to about 90°C, and the injection molding process If there is a stoppage of 2 minutes or more between the steps, the mixing section of the molding machine is filled with ε-caprolactam from the cleaning liquid tank at a pressure of about 4.5 - inert gas. The liquid is delivered by
The mixture of liquids A and B remaining in the mixing section is washed away, and the inside of the mixing section is replaced with ε-caprolactam. ε−
Caprolactam can be left at about 90°C for a long time without any problems.
このことから、該混合部内でのＡ液およびＢ液の重合反
応による混合部内の閉塞を防止することができる。This makes it possible to prevent clogging of the mixing section due to the polymerization reaction of liquids A and B in the mixing section.
第二の発明の反応射出成形機における混合部の洗浄パー
ジ装置は、同様に洗浄液用タンクおよび混合部並びに混
合部までのラインは約９０℃に温度調節されている。本
装置によると、射出成形の工程と工程の間で、２分間以
上の停止のある場合には、該成形機の混合部に、洗浄液
用タンクからε−カプロラクタムが該タンクに満たされ
た圧力約４．５にν笈の不活性ガスにより送液され、該
混合部内に残留するＡ液およびＢ液の混合液を押し流し
、該混合部内をε−カプロラクタムで置換することがで
きる。ε−カプロラクタムは約９０℃に長時間放置して
も何ら問題はない。このことから、該混合部内でのＡ液
およびＢ液の重合反ろによる混合部内の閉塞を防止する
ことができる。Similarly, in the cleaning and purging device for the mixing section in the reaction injection molding machine of the second invention, the temperature of the cleaning liquid tank, the mixing section, and the line to the mixing section is adjusted to about 90°C. According to this device, if there is a stoppage of 2 minutes or more between injection molding processes, the mixing section of the molding machine is filled with ε-caprolactam from the cleaning liquid tank at a pressure of approximately In step 4.5, the mixture of liquids A and B remaining in the mixing section is flushed away by feeding the liquid with an inert gas of v-heater, and the inside of the mixing section can be replaced with ε-caprolactam. ε-caprolactam can be left at about 90°C for a long time without causing any problems. This makes it possible to prevent clogging of the mixing section due to polymerization backlash of liquids A and B in the mixing section.
（作 用）
本発明によると、反応射出成形機の射出成形の工程と工
程の間に、ε−カプロラクタムを混合部内に満たすこと
により、原料液であるＡ液とＢ液の混合液を完全に混合
部外に押し流すことができ、混合部内の原料液滞留によ
る閉塞は生じない。(Function) According to the present invention, by filling the mixing section with ε-caprolactam between the injection molding steps of the reaction injection molding machine, the mixture of the raw material liquids A and B is completely mixed. It can be flushed out of the mixing section, and blockage due to raw material liquid retention within the mixing section does not occur.
（実施例）
次に本発明の実施例に基づいて、本発明の方法およびそ
れに使用する装置を説明する。(Example) Next, the method of the present invention and the apparatus used therein will be described based on examples of the present invention.
第１図に本発明の装置の一実施態様のシステム概念図を
示した。主触媒とε−カプロラクタムを成分とするＡ液
１４を原料用タンク１に、ポリオールとε−カプロラク
タムを成分とするＢ液１５を原料用タンク１０に投入し
、Ａ液はインペラ３により攪拌される。また洗浄液タン
ク３１にけε−カプロラクタム１６を投入する。FIG. 1 shows a system conceptual diagram of one embodiment of the apparatus of the present invention. A liquid A 14 containing a main catalyst and ε-caprolactam as components is put into a raw material tank 1, a B liquid 15 containing a polyol and ε-caprolactam as components is put into a raw material tank 10, and the A liquid is stirred by an impeller 3. . Further, ε-caprolactam 16 is charged into the cleaning liquid tank 31.
これら各タンクは不活性ガス用ボンベ１１より供給され
る不活性ガスにより約４．５ Ｋｐ／ｄに加圧されてい
る。さらに各タンクは温度調節体２により約９０℃に保
温されている。温度計１２は温度調節のための温度セン
サーである。またパルプブロック１３および混合部８感
温度調節体により常時約９０℃に保温されている。Each of these tanks is pressurized to about 4.5 Kp/d with inert gas supplied from an inert gas cylinder 11. Further, each tank is kept at about 90° C. by a temperature regulator 2. The thermometer 12 is a temperature sensor for temperature adjustment. Further, the pulp block 13 and the mixing section 8 are kept at a constant temperature of about 90° C. by the temperature-sensitive temperature controller.
リーバルブ６が図示した状態において原料タン混合部８
に導かれ混合されて吐出ロアより成形型に射出され成形
される。When the Lee valve 6 is in the state shown in the figure, the raw material tank mixing section 8
The mixture is mixed and injected into a mold from a discharge lower to be molded.
このような射出成形の工程と工程の間に、ロータリーバ
ルブ６を図示の状態とし、切換え弁９を開き、タンク内
の不活性ガス３２の圧力によりε−カプロラクタムを十
分量混合部８内に導く。これにより混合部８内に残留し
ているＡ液およびＢ液が吐出ロアよ）押し出され、混合
部８内は完全にε−カプロラクタムにより置換される。Between these injection molding steps, the rotary valve 6 is set to the state shown in the figure, the switching valve 9 is opened, and a sufficient amount of ε-caprolactam is guided into the mixing section 8 by the pressure of the inert gas 32 in the tank. . As a result, liquids A and B remaining in the mixing section 8 are pushed out (by the discharge lower), and the inside of the mixing section 8 is completely replaced with ε-caprolactam.
この結果、混合部８内の閉塞は起こらなかった。As a result, no clogging occurred in the mixing section 8.
（発明の効果）
本発明によると、反応射出成形機の射出成形の工程と工
程の間に、ε−カプロラクタムを混合部内に満たすこと
により、原料液であるＡ液とＢ液の混合液を完全に混合
部外に押し流すことができ、混合部内の原料液滞留によ
る閉塞は生じない。これにより円滑な反応射出成形の実
施が可能となる。(Effects of the Invention) According to the present invention, by filling the mixing section with ε-caprolactam between the injection molding processes of a reaction injection molding machine, the mixture of liquids A and B, which are raw material liquids, is completely mixed. This allows the liquid to be flushed out of the mixing section without causing blockage due to accumulation of raw material liquid inside the mixing section. This enables smooth reaction injection molding.
第１図は本発明の装置の一実施態様のシステム概念図、
第２図は従来技術による装置のシステム概念図、第３図
は混合部の断面図および第４図（ａ）および（ｂ）は混
合部内部部品であるチップの平面図を表わす。
図中、
６・・・ロータリーバルブFIG. 1 is a system conceptual diagram of an embodiment of the device of the present invention,
FIG. 2 is a system conceptual diagram of a conventional apparatus, FIG. 3 is a sectional view of a mixing section, and FIGS. 4(a) and 4(b) are plan views of chips that are internal components of the mixing section. In the diagram, 6... rotary valve
Claims (2)
ポリオールとε−カプロラクタムを成分とするＢ液、お
よび洗浄液であるε−カプロラクタムをそれぞれ別のタ
ンクに投入し、これら各タンクに不活性ガスを満たし、
Ａ液とＢ液を該ガス圧および送液装置により吐出口を先
端に配した混合部に送り、この混合部で混合後、該吐出
口より成形型に射出し成形する反応射出成形において、
この射出成形の工程と工程の間、該ε−カプロラクタム
を不活性ガス圧により該混合部内に送り、該混合部内に
残留するＡ液およびＢ液を該吐出口より押し流し、該混
合部内をε−カプロラクタムに置換することを特徴とす
る反応射出成形機における混合部の洗浄パージ方法。(1) Liquid A containing the main catalyst and ε-caprolactam,
Solution B, which contains polyol and ε-caprolactam, and ε-caprolactam, which is a cleaning liquid, are placed in separate tanks, and each tank is filled with inert gas.
In reaction injection molding, liquids A and B are sent by the gas pressure and the liquid feeding device to a mixing part having a discharge port at the tip, and after being mixed in this mixing part, the liquids are injected from the discharge port into a mold,
During the injection molding process, the ε-caprolactam is fed into the mixing section by inert gas pressure, and the A and B liquids remaining in the mixing section are flushed out from the discharge port, causing the ε-caprolactam to flow inside the mixing section. A method for cleaning and purging a mixing section in a reaction injection molding machine, characterized by substituting caprolactam with caprolactam.
料液を混合する混合部に送り、この混合液を該混合部の
先端に配した吐出口より成形型に射出し成形する反応射
出成形機における混合部の洗浄パージ装置が、混合部へ
配管されたε−カプロラクタムの入った洗浄液用タンク
、このタンクに満たす不活性ガスのボンベ、そして洗浄
液用タンクと混合部の中間に位置する該ε−カプロラク
タムを混合部へ導く切換え弁であるロータリーバルブお
よび該ε−カプロラクタムを該ロータリーバルブに導く
切換え弁とより構成されることを特徴とする反応射出成
形機における混合部の洗浄パージ装置。(2) Reaction injection molding, in which the raw material liquids for injection molding are sent from a tank containing them to a mixing part where these raw material liquids are mixed, and the mixed liquid is injected into a mold through a discharge port placed at the tip of the mixing part. The cleaning and purging device for the mixing section of the machine consists of a cleaning liquid tank containing ε-caprolactam that is piped to the mixing section, an inert gas cylinder that fills this tank, and an ε-caprolactam tank located between the cleaning liquid tank and the mixing section. - A cleaning and purging device for a mixing section in a reaction injection molding machine, comprising a rotary valve that is a switching valve that guides caprolactam to a mixing section, and a switching valve that guides the ε-caprolactam to the rotary valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61202788A JPS6357207A (en) | 1986-08-29 | 1986-08-29 | Method of wash purging mixing part and its equipment in reaction injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61202788A JPS6357207A (en) | 1986-08-29 | 1986-08-29 | Method of wash purging mixing part and its equipment in reaction injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6357207A true JPS6357207A (en) | 1988-03-11 |
Family
ID=16463202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61202788A Pending JPS6357207A (en) | 1986-08-29 | 1986-08-29 | Method of wash purging mixing part and its equipment in reaction injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6357207A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63212518A (en) * | 1986-11-04 | 1988-09-05 | Mitsubishi Monsanto Chem Co | Manufacture of sliding part |
| US5082437A (en) * | 1989-04-13 | 1992-01-21 | Sumitomo Rubber Industries, Ltd. | Reaction injection machine utilizing a plurality of reactant liquids |
| JPH05147024A (en) * | 1991-11-29 | 1993-06-15 | Polyurethan Kasei Kk | Apparatus for mixing multicomponent synthetic resin and cleaning method for the same |
-
1986
- 1986-08-29 JP JP61202788A patent/JPS6357207A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63212518A (en) * | 1986-11-04 | 1988-09-05 | Mitsubishi Monsanto Chem Co | Manufacture of sliding part |
| US5082437A (en) * | 1989-04-13 | 1992-01-21 | Sumitomo Rubber Industries, Ltd. | Reaction injection machine utilizing a plurality of reactant liquids |
| JPH05147024A (en) * | 1991-11-29 | 1993-06-15 | Polyurethan Kasei Kk | Apparatus for mixing multicomponent synthetic resin and cleaning method for the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1590366A (en) | Injection moulding | |
| CA1065842A (en) | Mixing apparatus | |
| JPS6357207A (en) | Method of wash purging mixing part and its equipment in reaction injection molding machine | |
| KR100692234B1 (en) | Insulation injection apparatus | |
| KR101388650B1 (en) | An injection molding apparatus for urethane | |
| JPS615908A (en) | Cleaning method of mixing section of reactive injection machine | |
| US3905582A (en) | Foamed material molding head | |
| US4066097A (en) | Apparatus for processing molten liquid plastics, particularly for extrusion of plastics | |
| JP2726892B2 (en) | Discharge method of liquid material in mixer and mixer | |
| GB2198386A (en) | Injecting resin | |
| EP0392541B1 (en) | Reaction injection machine utilizing a plurality of reactant liquids | |
| JP2021529247A (en) | Reactive plastic manufacturing equipment and manufacturing method | |
| JPH0235462Y2 (en) | ||
| KR0134274Y1 (en) | Inputting apparatus for chemicals of a mixer for rubber mixing | |
| JPS5832902Y2 (en) | Polyurethane resin mixing equipment | |
| KR102424426B1 (en) | Auto injection device for ice suger | |
| KR200258656Y1 (en) | Match system of undiluted solution and sclerotic | |
| CN210999415U (en) | Concrete prefabricated component pouring device | |
| KR20030015979A (en) | Match system of undiluted solution and sclerotic | |
| JP3274500B2 (en) | Method and apparatus for supplying liquid to casting machine | |
| JP3688992B2 (en) | Operation method of ground improvement agent supply plant | |
| JP2994221B2 (en) | Mixing head of reaction injection molding machine | |
| JPS63283913A (en) | Mixing injection machine of reactive injection molding device | |
| JP2599222Y2 (en) | Continuous injection device for diluted chemicals | |
| JPH0129056Y2 (en) |