JPH0327008B2 - - Google Patents
Info
- Publication number
- JPH0327008B2 JPH0327008B2 JP10347885A JP10347885A JPH0327008B2 JP H0327008 B2 JPH0327008 B2 JP H0327008B2 JP 10347885 A JP10347885 A JP 10347885A JP 10347885 A JP10347885 A JP 10347885A JP H0327008 B2 JPH0327008 B2 JP H0327008B2
- Authority
- JP
- Japan
- Prior art keywords
- mixing chamber
- liquid
- closing valve
- opening
- mixing
- 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
Links
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000010107 reaction injection moulding Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000012459 cleaning agent Substances 0.000 claims 4
- 239000007788 liquid Substances 0.000 description 73
- 238000004140 cleaning Methods 0.000 description 17
- 239000007789 gas Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000013019 agitation Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
- B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、複数の樹脂材料を反応させて成形す
る反応射出成形装置の混合ヘッドに関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mixing head for a reaction injection molding apparatus that molds a plurality of resin materials by reacting them.
従来の技術
従来の反応射出成形装置の混合ヘッドの一例に
ついて、図面を参照しながら説明する。従来の技
術として、例えば「プラスチック」第30巻第５号
114ペ−ジ（工業調査会）に示されている例の断
面図を第７図に示す。第７図において、１は混合
室、２は第１液流入口、３は第２液流入口、４は
圧縮空気流入口、５は攪拌翼、６は流出口であ
る。2. Description of the Related Art An example of a mixing head of a conventional reaction injection molding apparatus will be described with reference to the drawings. As a conventional technique, for example, "Plastics" Vol. 30 No. 5
A cross-sectional view of the example shown on page 114 (Industrial Research Association) is shown in FIG. In FIG. 7, 1 is a mixing chamber, 2 is a first liquid inlet, 3 is a second liquid inlet, 4 is a compressed air inlet, 5 is a stirring blade, and 6 is an outlet.
このように構成された反応射出成形装置の混合
ヘッドについて以下その動作について説明する。
まず混合室１の内部に第１液流入口２、第２液流
入口３からそれぞれ第１液及び第２液を注入し、
同時に攪拌翼５を回転させて第１液と第２液を混
合反応させながら流出口６から成形型内へ注入す
る。注入終了後、混合室１内部に付着した混合液
を圧縮空気流入口４から圧縮空気を吹き込んで外
部へ排出していた。 The operation of the mixing head of the reaction injection molding apparatus constructed in this manner will be described below.
First, a first liquid and a second liquid are injected into the mixing chamber 1 from the first liquid inlet 2 and the second liquid inlet 3, respectively.
At the same time, the stirring blade 5 is rotated to cause the first liquid and the second liquid to mix and react while being injected into the mold from the outlet 6. After the injection was completed, the mixed liquid adhering to the inside of the mixing chamber 1 was discharged to the outside by blowing compressed air through the compressed air inlet 4.
発明が解決しようとする問題点
しかしながら上記のような構成では、第１液、
第２液を混合室１内で攪拌翼５を回転させて、攪
拌、混合させる際に、気泡を巻き込むため、混合
液とともに気泡が成形型内に注入され、成形製品
にエアボイドなど欠陥部が発生するという問題点
を有していた。Problems to be Solved by the Invention However, in the above configuration, the first liquid,
When the second liquid is stirred and mixed by rotating the stirring blade 5 in the mixing chamber 1, air bubbles are involved, so the air bubbles are injected into the mold together with the mixed liquid, causing defects such as air voids in the molded product. There was a problem with this.
本発明は上記問題点を解決するもので、成形型
内に注入される混合液に気泡が含まれず、従って
成形製品にエアボイドなどの欠陥が発生しない反
応射出成形装置の混合ヘッドを提供するものであ
る。 The present invention solves the above-mentioned problems and provides a mixing head for a reaction injection molding apparatus in which air bubbles are not included in the liquid mixture injected into the mold, and therefore defects such as air voids do not occur in the molded product. be.
問題点を解決するための手段
上記問題点を解決するために本発明の反応射出
成形装置の混合ヘッドは、混合室に、複数樹脂材
料混合液を溜めた状態で、上記混合室の排気がで
きる位置に排気及び圧縮気体の供給をするための
開閉弁を設けたものである。Means for Solving the Problems In order to solve the above problems, the mixing head of the reaction injection molding apparatus of the present invention is capable of evacuating the mixing chamber with a plurality of resin material mixtures stored in the mixing chamber. An on-off valve is provided at the position for exhausting and supplying compressed gas.
作 用
本発明は上記の構成によって、混合室の射出口
開閉弁を閉じた状態で、第１液、第２液を混合室
に注入し、攪拌後、混合室上部に設けた排気及び
圧縮気体の供給をするための開閉弁を開いて混合
室内を排気し、混合液中に巻き込まれている気泡
を脱泡した後、射出口開閉弁を開いて成形型に混
合液を注入するため、成形型内に気泡が混入せ
ず、成形製品にエアボイドなどの欠陥が発生しな
くなる。Effects The present invention has the above-described configuration, in which the first liquid and the second liquid are injected into the mixing chamber with the injection port opening/closing valve of the mixing chamber closed, and after stirring, the exhaust gas and compressed gas provided at the upper part of the mixing chamber are injected. After opening the on-off valve for supplying the mixture and exhausting the inside of the mixing chamber to defoam the air bubbles caught in the mixed liquid, the injection port on-off valve is opened to inject the mixed liquid into the mold. Air bubbles will not be mixed into the mold, and defects such as air voids will not occur in the molded product.
実施例
以下本発明の一実施例の反応射出成形装置の混
合ヘッドについて図面を参照しながら説明する。Embodiment A mixing head of a reaction injection molding apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例における反応射出成
形装置の混合ヘッドの断面図を示す。第１図にお
いて、１１は混合室、１２は混合室１１に第１液
を注入する第１液注入口開閉弁、１３は第１液タ
ンク、１４は第１液計量ポンプ、１５は混合室１
１に第２液を注入する第２液注入口開閉弁、１６
は第２液タンク、１７は第２液計量ポンプ、１８
は混合室１１の上部に設けられ、混合室１１に対
して排気及び圧縮気体の供給をする排給気口開閉
弁、１９は排給気口開閉弁１８に通じる排気系、
２０は排気経路を開閉する排気弁、２１は排給気
口開閉弁１８から混合室１１に逆に圧縮空気を吹
き込む空圧源、２２は空圧経路を開閉する空圧制
御弁、２３は混合室１１に洗浄液を注入する洗浄
液注入口開閉弁、２４は洗浄液注入口開閉弁、２
３に通じる洗浄液タンク、２５は混合液を混合室
１１から成形型に射出する射出口開閉弁、２６は
洗浄液を混合室１１から外部へ排出する洗浄液排
出口、２７は洗浄液排出口２６を開閉する排出口
開閉弁、２８は混合室１１の中に設けられた攪拌
翼、２９は攪拌翼２８の駆動モータである。 FIG. 1 shows a sectional view of a mixing head of a reaction injection molding apparatus in an embodiment of the present invention. In FIG. 1, 11 is a mixing chamber, 12 is a first liquid inlet opening/closing valve for injecting the first liquid into the mixing chamber 11, 13 is a first liquid tank, 14 is a first liquid metering pump, and 15 is a mixing chamber 1
a second liquid inlet opening/closing valve for injecting a second liquid into 1;
is the second liquid tank, 17 is the second liquid metering pump, 18
19 is an exhaust air opening/closing valve provided at the upper part of the mixing chamber 11 and supplies exhaust gas and compressed gas to the mixing chamber 11; 19 is an exhaust system leading to the exhaust air opening/closing valve 18;
20 is an exhaust valve that opens and closes the exhaust path, 21 is a pneumatic source that blows compressed air from the exhaust air opening/closing valve 18 into the mixing chamber 11, 22 is a pneumatic control valve that opens and closes the pneumatic path, and 23 is a mixing device. A cleaning liquid inlet opening/closing valve 24 for injecting cleaning liquid into the chamber 11;
3, a cleaning liquid tank, 25, an injection opening/closing valve for injecting the mixed liquid from the mixing chamber 11 into the mold, 26, a cleaning liquid outlet for discharging the cleaning liquid from the mixing chamber 11 to the outside, and 27, opening and closing the cleaning liquid outlet 26. 28 is a stirring blade provided in the mixing chamber 11, and 29 is a drive motor for the stirring blade 28.
このように構成された反応射出成形装置の混合
ヘッドについて、以下第１図ないし第６図を用い
てその動作を説明する。第１図において、二液を
混合していない状態では、第１液注入口開閉弁１
２、第２液注入口開閉弁１５、排給気口開閉弁１
８、洗浄液注入口開閉弁２３、射出口開閉弁２５
及び排出口開閉弁２７はすべて閉じた状態であ
り、第１液が第１液計量ポンプ１４により圧送さ
れて、第１液注入口開閉弁１２と第１液タンク１
３との間を循環し、第２液が第２液計量ポンプ１
７により圧送されて、第２液注入口開閉弁１５と
第２液タンク１６との間を循環するように構成さ
れている。 The operation of the mixing head of the reaction injection molding apparatus constructed as described above will be explained below with reference to FIGS. 1 to 6. In Fig. 1, when the two liquids are not mixed, the first liquid inlet opening/closing valve 1
2. Second liquid inlet opening/closing valve 15, exhaust air opening opening/closing valve 1
8. Cleaning liquid inlet opening/closing valve 23, injection opening opening/closing valve 25
and the outlet opening/closing valve 27 are all closed, and the first liquid is fed under pressure by the first liquid metering pump 14 to the first liquid inlet opening/closing valve 12 and the first liquid tank 1.
3, the second liquid circulates between the second liquid metering pump 1
7 and circulated between the second liquid inlet opening/closing valve 15 and the second liquid tank 16.
次に混合時には、まず第２図に示すように、第
１液注入口開閉弁１２と第２液注入口開閉弁１５
を開き、混合室１１の中に第１液と第２液を必要
量だけ注入し、駆動モータ２９により攪拌翼２８
を回転させて、二液を攪拌混合する。 Next, at the time of mixing, first, as shown in FIG.
is opened, the required amount of the first liquid and the second liquid are injected into the mixing chamber 11, and the stirring blade 28 is driven by the drive motor 29.
Rotate to stir and mix the two liquids.
次に第３図に示すように、混合室１１内に混合
液を溜めた状態で、排給気口開閉弁１８と排気弁
２０を開いて、混合室１１内部を排気し、混合液
中に巻き込まれた気泡を脱泡する。 Next, as shown in FIG. 3, with the mixed liquid stored in the mixing chamber 11, the exhaust air opening/closing valve 18 and the exhaust valve 20 are opened to exhaust the inside of the mixing chamber 11, and the mixed liquid is poured into the mixed liquid. Defoaming trapped air bubbles.
次に第４図に示すように、射出口開閉弁２５を
開いて、混合室１１から成形型へ気泡が除去され
た混合液を射出する。なおこの時に、混合室１１
の内圧が外圧よりも低くて混合液が自重だけで
は、外部へ射出されないときには、混合室内外の
差圧が適正になるように、排気弁２０を閉じた状
態で、排給気口開閉弁１８と空圧制御弁２２を一
定時間だけ開き混合室に給気してから射出する。 Next, as shown in FIG. 4, the injection port opening/closing valve 25 is opened to inject the mixed liquid from which air bubbles have been removed from the mixing chamber 11 into the mold. At this time, the mixing chamber 11
When the internal pressure of the mixing chamber is lower than the external pressure and the mixed liquid cannot be injected to the outside by its own weight, the exhaust valve 20 is closed and the exhaust air opening/closing valve 18 is closed so that the differential pressure between the inside and outside of the mixing chamber is appropriate. Then, the pneumatic control valve 22 is opened for a certain period of time to supply air to the mixing chamber, and then the mixture is injected.
次に第５図に示すように、洗浄液注入口開閉弁
２３を開けて洗浄液タンク２４から洗浄液を混合
室１１へ注入し、混合室１１内に洗浄液を溜めた
状態で、攪拌翼２８を回転させ混合室１１を洗浄
する。 Next, as shown in FIG. 5, the cleaning liquid inlet opening/closing valve 23 is opened to inject the cleaning liquid from the cleaning liquid tank 24 into the mixing chamber 11, and with the cleaning liquid stored in the mixing chamber 11, the stirring blades 28 are rotated. Clean the mixing chamber 11.
次に第６図に示すように、排出口開閉弁２７を
開ける。同時に、排気弁２０を閉じた状態で、排
給気口開閉弁１８と空圧制御弁２２を開け、洗浄
液を洗浄液排出口２６から外部へ空気圧にて押し
出すとともに、さらに混合室１１の内部に付着し
た洗浄液の残液も空気圧により外部に排出し、次
の混合、射出に備える。 Next, as shown in FIG. 6, the outlet opening/closing valve 27 is opened. At the same time, with the exhaust valve 20 closed, the exhaust air opening/closing valve 18 and the pneumatic control valve 22 are opened, and the cleaning liquid is pushed out from the cleaning liquid outlet 26 to the outside using air pressure, and is further deposited inside the mixing chamber 11. The remaining cleaning liquid is also discharged to the outside by air pressure in preparation for the next mixing and injection.
以上のように本実施例によれば、第１液、第２
液の混合液を混合室１１内に溜めた状態で、混合
室１１の排気ができる位置に排給気口開閉弁１８
を設け、混合液が攪拌されたときに発生する気泡
を除去してから成形型に混合液を注入するため、
成形製品にエアボイドなどの欠陥が発生すること
はない。 As described above, according to this embodiment, the first liquid, the second liquid
With the mixture of liquids stored in the mixing chamber 11, the exhaust air inlet opening/closing valve 18 is located at a position where the mixing chamber 11 can be exhausted.
In order to remove air bubbles generated when the mixed liquid is stirred, the mixed liquid is injected into the mold.
Defects such as air voids do not occur in the molded product.
なお、本実施例では、混合室１１の排気と空圧
の供給を単一の排給気口開閉弁１８にて行なって
いるが、排気口開閉弁と給気口開閉弁を別々に設
けてもよい。また、２１は空圧源としたが、不活
性ガスなどでもよく、要は、圧縮気体源であれば
よい。 Note that in this embodiment, exhaust air and air pressure supply to the mixing chamber 11 are performed by a single exhaust air inlet opening/closing valve 18, but an exhaust opening opening/closing valve and an air supply opening opening/closing valve are provided separately. Good too. Further, although the reference numeral 21 is a pneumatic source, it may be an inert gas or the like, and in short, any compressed gas source is sufficient.
発明の効果
以上のように本発明は、混合室に複数樹脂材料
混合液を溜めた状態で、上記混合室の排気ができ
る位置に排気及び圧縮気体の供給をするための開
閉弁を設けたことにより、成形製品にエアボイド
などの欠陥が発生しないようにすることができ
る。Effects of the Invention As described above, the present invention provides an opening/closing valve for exhausting air and supplying compressed gas at a position where the mixing chamber can be evacuated while a plurality of resin material mixtures are stored in the mixing chamber. This can prevent defects such as air voids from occurring in the molded product.
第１図は本発明の一実施例における反応射出成
形装置の混合ヘッドの断面図、第２図ないし第６
図はその動作を説明するための工程図、第７図は
従来の反応射出成形装置の混合ヘッドの断面図で
ある。
１１…混合室、１２…第１液注入口開閉弁、１
３…第１液タンク、１４…第１液計量ポンプ、１
５…第２液注入口開閉弁、１６…第２液タンク、
１７…第２液計量ポンプ、１８…排給気口開閉
弁、２０…排気弁、２２…空圧制御弁、２３…洗
浄液注入口開閉弁、２４…洗浄液タンク、２５…
射出口開閉弁、２６…洗浄液排出口、２７…排出
口開閉弁、２８…攪拌翼。
FIG. 1 is a sectional view of a mixing head of a reaction injection molding apparatus according to an embodiment of the present invention, and FIGS.
The figure is a process diagram for explaining its operation, and FIG. 7 is a sectional view of a mixing head of a conventional reaction injection molding apparatus. 11...Mixing chamber, 12...First liquid inlet opening/closing valve, 1
3...First liquid tank, 14...First liquid metering pump, 1
5...Second liquid inlet opening/closing valve, 16...Second liquid tank,
17...Second liquid metering pump, 18...Exhaust air opening/closing valve, 20...Exhaust valve, 22...Pneumatic control valve, 23...Cleaning liquid inlet opening/closing valve, 24...Cleaning liquid tank, 25...
Injection port opening/closing valve, 26...Cleaning liquid discharge port, 27...Discharge port opening/closing valve, 28...Agitation blade.
Claims (1)
ための複数の樹脂材料注入開閉弁と、上記混合室
に洗浄剤を注入するための洗浄剤注入口開閉弁
と、上記混合室から複数樹脂材料混合液を射出す
るための射出口開閉弁と、上記混合室から洗浄剤
を排出するための排出口開閉弁と、上記混合室に
対して排気及び圧縮気体を供給するための開閉弁
と、上記混合室内部に設けられた攪拌手段とを備
え、上記混合室に複数樹脂材料混合液を溜めた状
態で上記混合室への排気を可能に構成した反応射
出成形装置の混合ヘッド。1 A mixing chamber, a plurality of resin material injection on/off valves for injecting resin components into the mixing chamber, a cleaning agent injection inlet on/off valve for injecting a cleaning agent into the mixing chamber, and a plurality of resin material injection on/off valves for injecting a cleaning agent into the mixing chamber; an injection port opening/closing valve for injecting the material mixture; an outlet opening/closing valve for discharging cleaning agent from the mixing chamber; and an opening/closing valve for supplying exhaust gas and compressed gas to the mixing chamber; A mixing head for a reaction injection molding apparatus, comprising a stirring means provided inside the mixing chamber, and configured to be capable of exhausting a plurality of resin material mixtures stored in the mixing chamber to the mixing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10347885A JPS61258712A (en) | 1985-05-14 | 1985-05-14 | Mixing head for reaction injection molding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10347885A JPS61258712A (en) | 1985-05-14 | 1985-05-14 | Mixing head for reaction injection molding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61258712A JPS61258712A (en) | 1986-11-17 |
| JPH0327008B2 true JPH0327008B2 (en) | 1991-04-12 |
Family
ID=14355115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10347885A Granted JPS61258712A (en) | 1985-05-14 | 1985-05-14 | Mixing head for reaction injection molding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61258712A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5082437A (en) * | 1989-04-13 | 1992-01-21 | Sumitomo Rubber Industries, Ltd. | Reaction injection machine utilizing a plurality of reactant liquids |
| US5562883A (en) * | 1995-05-05 | 1996-10-08 | Davidson Textron Inc. | Solvent flush reaction injection molding mixhead |
| FR2789621B1 (en) * | 1999-02-15 | 2001-05-04 | Secmer | VACUUM MIXER DEVICE FOR THE CASTING OF POLYMERIZABLE PLASTIC MATERIALS |
| DE10027589C1 (en) * | 2000-06-02 | 2001-10-11 | Uwe Roeth | Apparatus for making molds for dental implants under vacuum has top container whose base acts as lid for casting container and is fitted with outlet valve., tube outside container connecting base to wall of top container |
| DE10044013A1 (en) * | 2000-09-05 | 2002-03-14 | Hennecke Gmbh | Method and device for producing molded plastic parts from a flowable reaction mixture |
| KR100480381B1 (en) * | 2001-11-07 | 2005-03-30 | 이태성 | Colored mid-sole manufacture device |
| ITPD20020018A1 (en) * | 2002-01-28 | 2003-07-28 | Stemma Srl | MIXING AND INJECTION UNIT FOR POLYURETHANE WITH TWO OR MORE LIQUID COMPONENTS. |
| CN108556169A (en) * | 2018-03-28 | 2018-09-21 | 汪涛 | A kind of Novel rubber material device |
| CN108972989B (en) * | 2018-07-23 | 2020-10-23 | 苏州知瑞光电材料科技有限公司 | Pouring device in silica gel mold manufacturing device for surfboard fins |
-
1985
- 1985-05-14 JP JP10347885A patent/JPS61258712A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61258712A (en) | 1986-11-17 |
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