JPS63176117A - Two pack reaction injection - Google Patents
Two pack reaction injectionInfo
- Publication number
- JPS63176117A JPS63176117A JP62008779A JP877987A JPS63176117A JP S63176117 A JPS63176117 A JP S63176117A JP 62008779 A JP62008779 A JP 62008779A JP 877987 A JP877987 A JP 877987A JP S63176117 A JPS63176117 A JP S63176117A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- mixing chamber
- valve
- mold
- liquid
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 51
- 239000007924 injection Substances 0.000 title claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 98
- 239000002994 raw material Substances 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims description 22
- 239000000047 product Substances 0.000 abstract description 7
- 239000007795 chemical reaction product Substances 0.000 abstract description 2
- 206010047700 Vomiting Diseases 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000008673 vomiting Effects 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 12
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 8
- 239000004677 Nylon Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring 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
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/16—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with paddles or arms
-
- 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
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7174—Feed mechanisms characterised by the means for feeding the components to the mixer using pistons, plungers or syringes
-
- 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
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
- B01F35/8822—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances using measuring chambers of the piston or plunger type
-
- 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
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
- B29B7/242—Component parts, details or accessories; Auxiliary operations for feeding in measured doses
- B29B7/244—Component parts, details or accessories; Auxiliary operations for feeding in measured doses of several materials
-
- 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
- B29B7/801—Valves
-
- 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
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
- B29B7/283—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control measuring data of the driving system, e.g. torque, speed, power
-
- 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
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7471—Mixers in which the mixing takes place at the inlet of a mould, e.g. mixing chambers situated in the mould opening
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- 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、各原料槽に貯えられた2種以上の原料液を、
吸入開閉弁を経て各計量ポンプに吸入して計量した後、
吐出開閉弁を経て混合室へ吐出して混合し、この混合液
を射出11J閉弁を経て吸引装置で負圧にされている金
型内へ射出する2液反応射出方店に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method for using two or more raw material liquids stored in each raw material tank.
After suctioning into each metering pump through the suction on-off valve and measuring,
This invention relates to a two-liquid reaction injection method in which the mixed liquid is discharged into a mixing chamber through a discharge opening/closing valve and mixed, and the mixed liquid is injected into a mold which is kept under negative pressure by a suction device through an injection 11J closing valve.
〈従来の技術〉
この←1の2液反応射出方法に用いられろ装置としては
、従来、例えば第3図に示すよ5ならのが知られている
。そして、一般に、この2液反応射出装置によって次の
ようにして射出がなされる。<Prior Art> As a device used in the two-component reaction injection method of ←1, for example, a device 5 as shown in FIG. 3 is known. Generally, injection is performed using this two-liquid reaction injection device in the following manner.
即ち、大気に開放されたまたはチッ素ガス等で封入され
た各原料槽2+a、21bに貯えられた7〜。That is, 7~ stored in each raw material tank 2+a, 21b that is open to the atmosphere or sealed with nitrogen gas or the like.
B成分からなる原料液La、Lbを各計量ポンプ22a
、22bへ吸入するに先立ち、気泡の混入を防ぐために
、吸入開閉弁24a、24.bおよび吐出開閉弁25a
、25bを閉じ、射出開閉弁29を開いて、真空ポンプ
30で金型28.混合室26内を20x7Ii(g程度
に減圧した後、吸入開閉弁24a。The raw material liquids La and Lb consisting of component B are supplied to each metering pump 22a.
, 22b, the suction on-off valves 24a, 24. b and discharge on/off valve 25a
, 25b are closed, the injection on-off valve 29 is opened, and the mold 28. After reducing the pressure in the mixing chamber 26 to about 20x7Ii (g), the suction on-off valve 24a is opened.
24bを開き、吐出開閉弁25a、25bを閉じ、各計
量ポンプのピストン23a、23bを図中上方に引いて
原料液La、Lbをポンプ内に夫々吸入して計量する。24b is opened, the discharge on-off valves 25a and 25b are closed, and the pistons 23a and 23b of each metering pump are pulled upward in the figure to draw and meter the raw material liquids La and Lb into the pumps, respectively.
次に、吸入開閉弁24a、24bを閉じ、吐出開閉弁2
5a、25bを開き、上記ピストン23a、23bを図
中下方に押して両原料液を混合室26へ吐出し、これを
回転するプロペラ27で攪拌・混合した後、金型28内
に射出して、金型内で両原料液を反応させ成形している
。Next, the suction on-off valves 24a and 24b are closed, and the discharge on-off valve 2
5a and 25b, and push the pistons 23a and 23b downward in the figure to discharge both raw material liquids into the mixing chamber 26, stir and mix them with the rotating propeller 27, and then inject into the mold 28, Both raw material liquids are reacted in a mold to form the product.
〈発明が解決しようとする問題点〉
ところが、上記従来の2液反応射出方法によって、アル
カリ触媒とカプロラクタムからなろA成分と、ソフト成
分を含むプレポリマーとカプロラクタムからなる日成分
を反応、射出してUBEナイロンRIM UX−21(
商品名)を製造する場合、次のような問題があることが
明らかになった。<Problems to be Solved by the Invention> However, by the conventional two-component reaction injection method described above, it is possible to react and inject a component A consisting of an alkali catalyst and caprolactam, and a component consisting of a prepolymer containing a soft component and caprolactam. UBE nylon RIM UX-21 (
It has become clear that there are the following problems when manufacturing (trade name):
即ち、上記A、B両成分成分共に95〜105℃に加熱
溶融された状態で各原料槽21a、21bに貯えられ、
150℃に加熱された金型28内へ射出されて反応せし
められ成形されるが、A成分液の粘度が、5〜20cP
(センチポアズ)とB成分液の粘度100〜200cP
よりも相当低いうえ、混合室26が20Jl+mHgと
相当低圧まで減圧されているため、特に上記A成分液が
、吐出開閉弁25a。That is, both the A and B components are heated and melted at 95 to 105° C. and stored in each raw material tank 21a, 21b,
The A component liquid is injected into the mold 28 heated to 150°C, reacted and molded, but the viscosity of the A component liquid is 5 to 20 cP.
(centipoise) and B component liquid viscosity 100-200cP
In addition, the pressure in the mixing chamber 26 is reduced to a considerably low pressure of 20 Jl+mHg.
25bを開くや否やピストン23a、23bを押し下げ
る以前に混合室26内へ流れ込んで、2液の混合比を一
定に保てないことにより、成形品に反応が充分でない部
分を生じるという問題がある。そのため、A、B成分液
の射出量および射出時間を各計量ポンプ22a、22b
のシリンダ内圧とピストン速度によって制御しようとし
ても、制御精度が悪くて望ましい成形品を得ることがで
きないという問題がある。As soon as the liquid 25b is opened and before the pistons 23a and 23b are pushed down, the liquid flows into the mixing chamber 26, making it impossible to maintain a constant mixing ratio of the two liquids, resulting in a problem that some parts of the molded product do not react sufficiently. Therefore, the injection amount and injection time of the A and B component liquids are determined by each metering pump 22a, 22b.
Even if control is attempted using the cylinder internal pressure and piston speed, there is a problem in that the control accuracy is poor and a desirable molded product cannot be obtained.
そこで、本発明の目的は、吸入開閉弁と射出開閉弁の間
の計量ポンプ内の圧力を混合室の圧力よりも予め低くす
ることによって、原料液が計量ポンプのストローク分し
か吐出されないようにし、2種以上の原料液を各計量ポ
ンプによって正確な量だけ混合室内へ供給でき、均一成
分比の望ましい反応生成物を得ることができる2液反応
射出方法を提供することである。Therefore, an object of the present invention is to make the pressure in the metering pump between the suction on-off valve and the injection on-off valve lower than the pressure in the mixing chamber in advance so that the raw material liquid is discharged only by the stroke of the metering pump, It is an object of the present invention to provide a two-liquid reaction injection method in which accurate amounts of two or more raw material liquids can be supplied into a mixing chamber by each metering pump, and a desired reaction product having a uniform component ratio can be obtained.
〈問題点を解決するための手段〉
上記目的を達成するため、各原料槽に貯えられた2種以
上の原料液を、吸入開閉弁を経て各計量ポンプに吸入し
て計1した後、計量された原料液を吐出開閉弁を経て混
合室へ吐出して混合し、上記混合室内の混合液を射出開
閉弁を経て吸引装置て負圧にされている金型内へ射出す
る本発明の2液反応射出方法は、少なくとも上記吸入開
閉弁を閉じて計量ポンプ内の圧力を減圧した後、吸入開
閉弁を開き、上記吐出開閉弁を閉ざした状態で、計量ポ
ンプに原料液を吸入し、上記射出開閉弁を開き、上記吸
引装置で金型内および混合室内を大気圧よりも低く、か
つ計量ポンプ内の圧力と同等かまたは高(なるように減
圧した後、吐出開閉弁を開いて計量ポンプで原料液を混
合室に経て金型内へ射出することを特徴とする。<Means for solving the problem> In order to achieve the above purpose, two or more types of raw material liquids stored in each raw material tank are sucked into each metering pump via a suction on-off valve, and then weighed. 2 of the present invention, in which the raw material liquid is discharged through a discharge on-off valve to a mixing chamber for mixing, and the mixed liquid in the mixing chamber is injected through an injection on-off valve into a mold which is under negative pressure through a suction device. In the liquid reaction injection method, at least the suction on-off valve is closed to reduce the pressure inside the metering pump, the suction on-off valve is opened, and the discharge on-off valve is closed, and the raw material liquid is sucked into the metering pump. Open the injection on-off valve, and use the above suction device to reduce the pressure inside the mold and mixing chamber to below atmospheric pressure and equal to or higher than the pressure inside the metering pump, then open the discharge on-off valve and remove the pressure in the metering pump. The method is characterized in that the raw material liquid is injected into the mold through a mixing chamber.
〈実施例〉
以下、本発明を図示の実施例により詳細に説明する6
第1図は本発明の2液反応射出方法に用いる装置の一例
を示した模式図であり、I a、 I bは夫々A、B
2種の原料液を貯える大気に開放された原料槽、2 a
、 2 bは各原料槽1a、lbに連通し、ピストン3
a、 3 bの往動で原料液A、Bを吸入開閉弁4a
。<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated examples.6 Figure 1 is a schematic diagram showing an example of an apparatus used in the two-liquid reaction injection method of the present invention, and I a and I b are A and B respectively
A raw material tank open to the atmosphere that stores two types of raw material liquids, 2a
, 2b communicates with each raw material tank 1a, lb, and piston 3
The opening/closing valve 4a sucks raw liquids A and B by forward movement of a and 3b.
.
4bを経て吸入して計量し、上記各ピストンの復動で計
量された原料液A、Bを吐出開閉弁5 a、 5 bを
経て吐出する計量ポンプ、6は各計量ポンプ2a。A metering pump 6 is each metering pump 2a, which sucks and meters the raw material liquids A and B through the reciprocating motion of each piston and discharges them through discharge on-off valves 5a and 5b.
2bから吐出された原料液A、Bを回転プロペラ7で攪
拌して混合する混合室、8はこの混合室6内の混合液が
射出開閉弁9を経て射出される金型、lOはこの金型8
内の空気を吸引する真空ポンプ、11は上記混合室6に
給液開閉弁12を経て洗浄液を供給する洗浄液タンク、
13は上記混合室6内の廃液を排液開閉弁14を経て回
収する廃液タンク、15はこの廃液タンク13内の空気
を吸引する真空ポンプである。A mixing chamber in which the raw material liquids A and B discharged from 2b are stirred and mixed by a rotary propeller 7, 8 is a mold into which the mixed liquid in this mixing chamber 6 is injected via an injection on-off valve 9, and IO is this mold. Type 8
11 is a cleaning liquid tank that supplies cleaning liquid to the mixing chamber 6 through a liquid supply on/off valve 12;
Reference numeral 13 designates a waste liquid tank that collects the waste liquid in the mixing chamber 6 via the drain opening/closing valve 14, and 15 a vacuum pump that sucks air within the waste liquid tank 13.
アルカリ触媒とカプロラクタムからなる原料液Aと、ソ
フト成分を含むプレポリマーとカプロラクタムからなる
原料液BからUBEナイロンRIMUX−21を製造す
る第1図の装置を用いた2液反応射出方法について、第
2図を参照しつつ次に述べる。Regarding the two-liquid reaction injection method using the apparatus shown in Fig. 1, which produces UBE nylon RIMUX-21 from raw material liquid A consisting of an alkali catalyst and caprolactam and raw material liquid B consisting of prepolymer containing a soft component and caprolactam, This will be explained next with reference to the figure.
(1)操作に先立って、全ての開閉弁は閉じた状態にあ
り、ピストン3 a、 3 bは第1図中の下限位置に
あるものとする。まず、吐出開閉弁5 a、 5 bと
排液開閉弁I4を開き、真空ポンプI5によって空気を
吸引し、計量ポンプ2a、2bのシリンダ室、混合室6
.廃液タンクI3内を2%m1gまで減圧する。(1) Prior to operation, it is assumed that all on-off valves are closed and the pistons 3a and 3b are at the lower limit positions in FIG. First, the discharge on-off valves 5 a, 5 b and the drain on-off valve I4 are opened, air is sucked by the vacuum pump I5, and the cylinder chambers of the metering pumps 2 a, 2 b and the mixing chamber 6 are
.. The pressure inside the waste liquid tank I3 is reduced to 2% ml.
(2)上記吐出開閉弁5 a、 5 bと排液開閉弁1
4を閉じ、吸入開閉弁4a、4bを開くとともに、ピス
トン3 a、 3 bを第1図中の上限位置まで往動さ
せて、原料槽1a、Ibから計量ポンプ2a、2bのシ
リンダ室に夫々原料液A、Bを吸入して計量する。(2) The discharge on-off valves 5 a, 5 b and the drain on-off valve 1
4, and open the suction on-off valves 4a, 4b, and move the pistons 3a, 3b forward to the upper limit positions shown in FIG. Inhale and measure raw material solutions A and B.
このとき、計量ポンプ2a、2bのシリンダ室内は2x
iHg!、:減圧されており、内部に空気が混入するこ
とかなく、原料液の正確な計量が行なえる。At this time, the cylinder chambers of the metering pumps 2a and 2b are 2x
iHg! ,: The pressure is reduced, and the raw material liquid can be accurately measured without air being mixed inside.
(3)上記吸入開閉弁4a、4bを閉じ、射出開閉弁9
を開いて、真空ポンプ10によって空気を吸引し、混合
室6.金型8内を20x*Hgまで減圧する。(3) Close the suction on-off valves 4a and 4b, and close the injection on-off valve 9.
The mixing chamber 6. is opened and air is drawn in by the vacuum pump 10. The pressure inside the mold 8 is reduced to 20x*Hg.
(4)吐出開閉弁5 a、 5 bを開くととらに、ピ
ストン3 a、 3 bを下限位置へ向けて復動させ、
原料液A、Bを計量ポンプ2a、2bから混合室6内へ
吐出する。この吐出開始時に、シリンダ室内の原料液A
、Bの液圧は、吸入開閉弁4 a、 4 bが閉じてい
て大気圧が加イつらないため、2aml−1gと混合室
6の内圧20zuI−1gよりも低く、従って、従来の
ようにピストン3a、3bが復動する前に原料液A、B
が混合室6へ流れ込むことがなく、原料液Bは勿論、特
に粘度の低い原料液Aの計量ポンプ2aによる正確な射
出量と射出時間の制御が行なえる。計量ポンプ2a、2
bから吐出された原t4液A、Bは、混合室6内の回転
プロペラ7で攪拌・混合された後、開状態の射出開閉弁
9を経て金型8内へ射出される。このとき、金型8内ら
同じ< 20 、v1!l−(gに減圧されているので
、均一に混合された混合液は、空気を混入することなく
円滑に金型8内へ射出される。(4) When the discharge on-off valves 5a, 5b are opened, the pistons 3a, 3b are moved back toward the lower limit position,
Raw material liquids A and B are discharged into the mixing chamber 6 from the metering pumps 2a and 2b. At the start of this discharge, the raw material liquid A in the cylinder chamber
, B are lower than 2aml-1g and the internal pressure of 20zuI-1g in the mixing chamber 6 because the suction on-off valves 4a and 4b are closed and the atmospheric pressure is not increased, and therefore, as in the conventional case, Before the pistons 3a and 3b move back, the raw material liquids A and B
Since no liquid flows into the mixing chamber 6, the injection amount and injection time of not only the raw material liquid B but also the raw material liquid A, which has a particularly low viscosity, can be accurately controlled by the metering pump 2a. Metering pump 2a, 2
The raw T4 liquids A and B discharged from b are stirred and mixed by a rotating propeller 7 in a mixing chamber 6, and then injected into a mold 8 through an injection on-off valve 9 which is in an open state. At this time, the inside of the mold 8 is the same < 20, v1! Since the pressure is reduced to 1-(g), the uniformly mixed liquid mixture is smoothly injected into the mold 8 without mixing air.
(5)射出が終了すると、吐出開閉弁5 a、 5 b
と射出開閉弁9を閉じ、給液開閉弁12と排液開閉弁1
・1を所定時間だけ開いて、洗浄液タンク11の洗浄液
で混合室6内を洗浄し、洗浄後の廃液を廃液タンクI3
に回収する。このとき、洗浄液タンクは大気に開放され
またはチッ素カスにより加圧されており、混合室6およ
び廃液タンクI3内は2Qzil(gに減圧されている
ので、給液開閉弁を短時間開くだけで、洗浄液の供給1
回収が行なえろ。洗浄が終わると、混合室6および廃液
タンク13内は大気圧に達する。(5) When the injection is completed, the discharge on-off valves 5 a, 5 b
and close the injection on-off valve 9, and close the liquid supply on-off valve 12 and drain on-off valve 1.
1 for a predetermined period of time, the inside of the mixing chamber 6 is cleaned with the cleaning liquid in the cleaning liquid tank 11, and the waste liquid after cleaning is transferred to the waste liquid tank I3.
to be collected. At this time, the cleaning liquid tank is open to the atmosphere or pressurized by nitrogen scum, and the pressure inside the mixing chamber 6 and waste liquid tank I3 is reduced to 2Qzil (g), so simply opening the liquid supply on/off valve for a short time , Cleaning liquid supply 1
Let's collect it. When cleaning is completed, the inside of the mixing chamber 6 and the waste liquid tank 13 reach atmospheric pressure.
上記(5)の操作から所定時間が経過すると、金型8内
に射出された混合液は、反応を終えて成形品となり、金
型8を開いてこの成形品を取り出す。When a predetermined period of time has elapsed from the operation (5) above, the liquid mixture injected into the mold 8 completes its reaction and becomes a molded product, and the mold 8 is opened to take out the molded product.
これによって、金型8内も大気圧となる。以上で1回の
2液反応射出工程か終了し、再び上記(1)の操作に戻
って次の射出工程が姶よることになる。As a result, the inside of the mold 8 also becomes atmospheric pressure. This completes one two-liquid reaction injection process, and the procedure returns to step (1) above for the next injection process.
かかる2液反応射出方法によるMCナイロンUX−21
の射出特性の具体例を挙げれば、上記原料液Aおよび原
料液Bの射出量を150cc、各計量ポンプ(シリンダ
径49悶)の射出速度を80cc/minとして、10
回の射出成形を行なった場合、設定射出時間に対する実
射出時間の誤差は、A液が十0.9%、B液が±03%
であり、設定射出量に対する実射出量の誤差はA液が±
0.5%、B液が±0.2%と極く僅かであった1、因
に、これと同一条件で従来の2液反応射出方法によって
MCナイロン0X−21の製造を試みたところ、計量ポ
ンプの吐出工程以前の30〜40秒の間に両原料液A、
Bが混合室内へ全て流出してしまい、製造不可能であっ
た。MC nylon UX-21 produced by such two-component reaction injection method
To give a specific example of the injection characteristics of
When injection molding is performed twice, the error between the actual injection time and the set injection time is 10.9% for liquid A and ±03% for liquid B.
The error between the actual injection amount and the set injection amount is ±
0.5%, and B liquid was extremely small at ±0.2%1.Incidentally, when we tried to manufacture MC nylon 0X-21 using the conventional two-component reaction injection method under the same conditions, During 30 to 40 seconds before the discharge process of the metering pump, both raw material liquids A,
B completely leaked into the mixing chamber, making production impossible.
上記実施例では、混合室6に洗浄液の給排ライン(11
,12,14,1,3)を設け、これiこよって混合室
内を毎回洗浄するとともに、この給排ラインの廃液タン
ク13に真空ポンプI5を設け、この1台の真空ポンプ
15によって両計崖ポンプ2a。In the above embodiment, the cleaning liquid supply/discharge line (11
, 12, 14, 1, 3), which clean the inside of the mixing chamber every time.A vacuum pump I5 is also installed in the waste liquid tank 13 of this supply and discharge line, and this one vacuum pump 15 cleans the inside of the mixing chamber every time. Pump 2a.
2b内の圧力を原料槽1.a、Ib内の圧力よりも低く
なるように減圧(2几π■−(g)シ、かつ廃液タンク
内をも減圧して洗浄液の給排を行なわせろようにしたの
で、設備に無駄のない経済的な装置でらって2液反応射
出方法を行なうことができ、洗浄により毎回の射出にお
いてより正確な量の混合液を金型へ供給することができ
る。2b to the raw material tank 1. By reducing the pressure (2⇠π■-(g)) so that it is lower than the pressure in a and Ib, and also reducing the pressure in the waste liquid tank to supply and drain cleaning liquid, there is no waste in the equipment. The two-component reaction injection process can be carried out using economical equipment, and cleaning allows a more accurate amount of the mixture to be delivered to the mold for each injection.
なお、上記実施例では、計量ポンプ内を減圧する真空ポ
ンプ15を、前述の如く廃液タンク13を介して混合室
6に設けたが、これを直接混合室6に、あるいは各計量
ポンプ2 a、 2 bのシリンダ室に、または計量ポ
ンプから混合室のラインの途中に設けて、各開閉弁を適
宜操作して同様の手順で2液反応射出を行なわせること
もできる。また、上記実施例では、A、82種の原料液
を混合して射出する場合について述べたが、本発明か3
種以上の原料液の混合、射出にも適用できることはいう
までしない。In the above embodiment, the vacuum pump 15 for reducing the pressure inside the metering pump was provided in the mixing chamber 6 via the waste liquid tank 13 as described above, but it could be installed directly in the mixing chamber 6 or in each metering pump 2a, It is also possible to install it in the cylinder chamber of 2b or in the middle of the line from the metering pump to the mixing chamber, and perform two-liquid reaction injection in the same manner by operating each on-off valve as appropriate. In addition, in the above embodiment, A, the case where 82 kinds of raw material liquids are mixed and injected, but the present invention
It goes without saying that it can also be applied to mixing and injection of raw material liquids of more than one type.
〈発明の効果〉
以上の説明で明らかなように、本発明の2液反応射出方
法は、原料槽から各計量ポンプに各原料液を吸入する際
、吸入開閉弁を閉じて計量ポンプ内の圧力を予め減圧す
るとともに、計量ポンプ内に吸入され計量された各原料
液を、吐出開閉弁。<Effects of the Invention> As is clear from the above explanation, in the two-component reaction injection method of the present invention, when each raw material liquid is sucked from the raw material tank to each metering pump, the suction on-off valve is closed to reduce the pressure inside the metering pump. The pressure is reduced in advance, and each raw material liquid sucked into the metering pump and measured is discharged through an on-off valve.
混合室、射出開閉弁を経て金型内へ射出する際、上記吐
出開閉弁を閉ざした状態で金型内および混合室内を大気
圧よりも低く、かつ計量ポンプ内の圧力よりも高くなる
ように予め減圧するようにしているので、計量ポンプへ
の原料液の吸入に際し、空気の混入がないため、原料液
の正確な計量ができるとともに、計量ポンプの吐出工程
以前に、1男かれた吐出開閉弁を経て混合室内へ原料液
が流れ込むことがなく、したがって、粘性の低い原料液
でも計量ポンプによる射出量と射出時間の正確な制御が
行なえ、均質で高品質な2液反応射出成形品を得ること
ができる。When injecting into the mold through the mixing chamber and injection on-off valve, the pressure inside the mold and the mixing chamber is lower than atmospheric pressure and higher than the pressure inside the metering pump with the discharge on-off valve closed. Since the pressure is reduced in advance, there is no air mixed in when the raw material liquid is drawn into the metering pump, allowing for accurate metering of the raw material liquid. The raw material liquid does not flow into the mixing chamber through the valve, so even with low viscosity raw material liquids, the injection amount and injection time can be accurately controlled by the metering pump, resulting in homogeneous, high-quality two-component reaction injection molded products. be able to.
、第1図は本発明の2液反応射出方法に用いる装置の一
例を示した模式図、第2図は第1図の装置を用いた2液
反応射出方法の手順を示す図、第3図は従来の2液反応
射出装置の模式図である。
Ia、lb・・・原料槽、2 a、 2 b・・・計量
ポンプ、3 a、 3 b・・・ピストン、4 a、
4 b・・・吸入開閉弁、5a、5b・・・吐出開閉弁
、6・・・混合室、7・・・回転プロペラ、8・・・金
型、9・・・射出開閉弁、lO・真空ポンプ、11・・
・洗浄液タンク、12・・・給液開閉弁、I3・・・廃
液タンク、14・・排液開閉弁、15 ・真空ポンプ。
特 許 出 願 人 住友ゴム工業株式会社代 理
人 弁理士 青 山 葆 ほか2名第1 面, FIG. 1 is a schematic diagram showing an example of the apparatus used in the two-component reaction injection method of the present invention, FIG. 2 is a diagram showing the procedure of the two-component reaction injection method using the apparatus of FIG. 1, and FIG. is a schematic diagram of a conventional two-liquid reaction injection device. Ia, lb... Raw material tank, 2 a, 2 b... Metering pump, 3 a, 3 b... Piston, 4 a,
4 b... Suction on/off valve, 5a, 5b... Discharge on/off valve, 6... Mixing chamber, 7... Rotating propeller, 8... Mold, 9... Injection on/off valve, lO. Vacuum pump, 11...
-Cleaning liquid tank, 12...Liquid supply on/off valve, I3...Waste liquid tank, 14...Drainage liquid on/off valve, 15 -Vacuum pump. Patent applicant Agent: Sumitomo Rubber Industries, Ltd.
People Patent attorney Aoyama Aoyama and 2 others Front page
Claims (1)
開閉弁を経て各計量ポンプに吸入して計量した後、計量
された原料液を吐出開閉弁を経て混合室へ吐出して混合
し、上記混合室内の混合液を射出開閉弁を経て吸引装置
で負圧にされている金型内へ射出する2液反応射出方法
において、少なくとも上記吸入開閉弁を閉じて計量ポン
プ内の圧力を減圧した後、吸入開閉弁を開き、上記吐出
開閉弁を閉ざした状態で、計量ポンプに原料液を吸入し
、上記射出開閉弁を開き、上記吸引装置で金型内および
混合室内を大気圧よりも低く、かつ計量ポンプ内の圧力
と同等かまたは高くなるように減圧した後、吐出開閉弁
を開いて計量ポンプで原料液を混合室を経て金型内へ射
出することを特徴とする2液反応射出方法。(1) Two or more types of raw material liquids stored in each raw material tank are sucked into each metering pump via a suction on-off valve and measured, and then the measured raw material liquids are discharged into the mixing chamber via a discharge on-off valve. In a two-liquid reaction injection method in which the mixed liquid in the mixing chamber is injected into a mold which is under negative pressure by a suction device through an injection on-off valve, at least the suction on-off valve is closed and the liquid in the metering pump is injected. After reducing the pressure, open the suction on-off valve, close the above-mentioned discharge on-off valve, suck the raw material liquid into the metering pump, open the above-mentioned injection on-off valve, and use the suction device to vacuum the inside of the mold and the mixing chamber. After reducing the pressure to a level lower than atmospheric pressure and equal to or higher than the pressure inside the metering pump, the discharge on-off valve is opened and the metering pump injects the raw material liquid into the mold through the mixing chamber. Two-liquid reaction injection method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62008779A JPS63176117A (en) | 1987-01-16 | 1987-01-16 | Two pack reaction injection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62008779A JPS63176117A (en) | 1987-01-16 | 1987-01-16 | Two pack reaction injection |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63176117A true JPS63176117A (en) | 1988-07-20 |
Family
ID=11702364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62008779A Pending JPS63176117A (en) | 1987-01-16 | 1987-01-16 | Two pack reaction injection |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63176117A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0276008U (en) * | 1988-11-28 | 1990-06-11 | ||
JP2002103344A (en) * | 2000-09-29 | 2002-04-09 | Mitsuboshi Belting Ltd | Apparatus for manufacturing casting polyamide resin and washing method therefor |
-
1987
- 1987-01-16 JP JP62008779A patent/JPS63176117A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0276008U (en) * | 1988-11-28 | 1990-06-11 | ||
JP2002103344A (en) * | 2000-09-29 | 2002-04-09 | Mitsuboshi Belting Ltd | Apparatus for manufacturing casting polyamide resin and washing method therefor |
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