DE3000478A1 - Adjustable needle nozzle for resin reagents mixer - needle end has tapered longitudinal groove and is adjusted longitudinally - Google Patents

Adjustable needle nozzle for resin reagents mixer - needle end has tapered longitudinal groove and is adjusted longitudinally

Info

Publication number
DE3000478A1
DE3000478A1 DE19803000478 DE3000478A DE3000478A1 DE 3000478 A1 DE3000478 A1 DE 3000478A1 DE 19803000478 DE19803000478 DE 19803000478 DE 3000478 A DE3000478 A DE 3000478A DE 3000478 A1 DE3000478 A1 DE 3000478A1
Authority
DE
Germany
Prior art keywords
nozzle
needle
mixer
groove
longitudinal groove
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.)
Ceased
Application number
DE19803000478
Other languages
German (de)
Inventor
Wolfgang 8035 Gauting Krompaß
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Krauss Maffei AG filed Critical Krauss Maffei AG
Priority to DE19803000478 priority Critical patent/DE3000478A1/en
Publication of DE3000478A1 publication Critical patent/DE3000478A1/en
Ceased legal-status Critical Current

Links

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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7631—Parts; Accessories
    • B29B7/7636—Construction of the feed orifices, bores, ports
    • B29B7/7642—Adjustable feed orifices, e.g. for controlling the rate of feeding
    • 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
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7684—Parts; Accessories

Abstract

Adjustable-section nozzle at the inlet of a mixing chamber allows regulation of small quantities used in synthetic resin reactions in a mixing head. A needle nozzle moves in its inlet and has at least one external tapered face or groove along its length. Arrangement permits feed adjustment down to a few g/sec. without gradually changing over time.

Description

Die Erfindung betrifft eine Düse mit einem willkürlich veränderbaren Querschnitt der Eintrittsöffnung zu einer Mischkammer zum Einstellen kleiner Durchtrittstnengen für die Verarbeitung von Reaktionskunststoffen mittels eines Nischkopfes. Ein solcher Mischkopf ist aus den DE-ASen 25 13 492 und 26 02 669 bekannt. The invention relates to a nozzle with an arbitrarily variable Cross-section of the inlet opening to a mixing chamber for setting small passage volumes for processing reaction plastics using a niche head. Such a Mixing head is known from DE-ASs 25 13 492 and 26 02 669.

Die bekannten Verstellvorrichtungen sind, wennThe known adjusting devices are if

es um den Durchtritt kleiner Mengen bis hinunter zu einigen Gramm jeder der beiden Kunststoffkomponenten pro Sekunde geht (Gewicht des Formteils zwischen 5 und 50 g), nicht mehr zufriedenstellend. Das hat seinen Grund darin, daß schon beim kleinsten in der Praxis realisierbaren Abheben des Ventilteils die freigegebene Durchtrittsfläche relativ gro!i wird. Da es sich um Kunststoffkomponenten (z.3. Polyol, Isocyanat) handelt, verbietet es sich z.B. aus Gründen der Zusetzbarkeit, Düsen mit kleinsten Querschnitten zu netmen, was für wasserähliliche Flüssigkeiten durchaus möglich wäre.it is about the passage of small amounts down to a few grams each of the two plastic components goes per second (weight of the molded part between 5 and 50 g), no longer satisfactory. The reason for this is that yes at the smallest lifting of the valve part that can be realized in practice, the released one Passage area becomes relatively large. Since these are plastic components (e.g. 3. Polyol, isocyanate), it is forbidden, e.g. for reasons of addability, Nozzles with the smallest cross-sections to be used, what for water-like liquids would be quite possible.

Der Erfindung liegt die Aufgabe zugrunde, den Öffnungsquerschnitt einer Düse zum Durchtritt für miteinander reagierende Kunststoffkomponenten veränderbar so auszugestalten, daß auch dosierte Mengen von nur wenigen Gramm pro Sekunde hindurchtreten können, ohne daß der Querschnitt sich mit der Zeit zusetzt.The invention is based on the object of the opening cross-section a nozzle for the passage of reacting plastic components changeable designed so that even metered amounts of only a few grams per second pass through without the cross-section becoming clogged over time.

Die Aufgabe wird durch die Maßnahme nach dem Kennzeichen des Anspruches 1 gelöst. Die axiale Stellung der Düsennadel ist dabei ein Maß für den Durchtrittsquerschnitt, wobei die Formgebung der Nut für die Feinheit der Durchtrittssteuerung verantwortlich ist. Besonders geeignet ist eine Nutenform nach Anspruch 2. Die Nut verhindert auch weitgehend, daß sich die Durchtrittsöffnung mit der Zeit zusetzt, weil alle Komponententeile in Bewegung gehalten werden und somit keine Absetzmöglichkeit finden.The task is determined by the measure according to the characteristic of the claim 1 solved. The axial position of the nozzle needle is a measure of the passage cross-section, whereby the shape of the groove is responsible for the fineness of the passage control is. A groove shape according to claim 2 is particularly suitable. The groove also prevents largely that the passage opening clogs over time, because all component parts be kept in motion and thus find no possibility of withdrawal.

Ein durch eine Disemladel steuerbarer Mischkopf ist durch die DE-AS 25 01 483 bekanntgeworden; jedoch dient diese Düsennadel lediglich zum Verschlieren der Düsenöifnung. In der Hydraulik sind Ventileinsätze mit konischem Ventilsitz und mit Feinsteuerkerben bereits angewandt worden. Die Ventileinsätze sind dort aber federbelastet und sollen eine Steuerung bewirken, die abhängig ist von dem Verhältnis der konischen Ventilsitzfläche zur Fläche des Ventileinsatzes.A mixing head controllable by a Disemladel is by the DE-AS 25 01 483 became known; however, this nozzle needle is only used for occlusion the nozzle opening. In hydraulics, there are valve inserts with a conical valve seat and with fine control notches have already been applied. The valve cores are there but spring-loaded and are intended to effect a control that is dependent on the Ratio of the conical valve seat area to the area of the valve insert.

Anspruch 3 gibt eine bei etwas größeren Durchtrittsmengen geeignete Lösung an, die darüberhinaus den Hischeffekt in der anschließenden Mischkammer erhöht.Claim 3 gives a suitable for slightly larger amounts of passage Solution, which also increases the noise effect in the subsequent mixing chamber.

In der Zeichnung ist die Erfindung anhand zwele, AusführungsbeisDiele dargestellt. Dabei zeigt Fig. 1 den Längsschnitt durch einen Mischkopf mit einer Nut in der Düsennadel und Fig. 2 die Draufsicht au eine aLgewandelteb Düsennadel mit drei Nuten.In the drawing, the invention is based on two, AusführungsbeisDiele shown. 1 shows the longitudinal section through a mixing head with a Groove in the nozzle needle and FIG. 2 the plan view of a modified nozzle needle with three grooves.

in Mischkopf 1 nach Fig. 1 weist ein Zylindergehäuse 2, einen mit zwei Überströmnuten 4 versehenen Steuerkolben 3 und im Zylindergehäuse 2 zwei ein ander gegenüberliegende Eintrittsöffnungen 6 und zwei ebenfalls einander gegenüberliegende Hückströmöffnungen 8 auf. Der Steuerkolben 3 kann zwei Endlagen einnehmen. Bei der gezeichneten (oberen) Endlage wird im Bereich unterhalb des Steuerkolbens 3 eine Diischkammei 5 gebildet, in die mit hohem Druck über die Eintrittsöffnungen 6 Kunststoffkomponenten eintreten, sich miteinander vermischen und über eine Austrittsöffnung 7 in einen Formhohlraum (unmittelbar oder über einen Beruhigungskanal) austreten. In der unteren Endlage des Steuerkolbens 3 werden die über die Eintrittsöffnungen 6 eintretenden Kunststoffkomponenten über die überströmnuten 4 und die Rückströmöffnungen 8 unvermischt zurückgeleitet, wobei der Steuerkolben 3 bei seinem Weg in die untere Endlage die in der Mischkammer 5 befindliche Menge an gemischten Komponenten ausstößt, ferner die Verbindung der Eintrittsöffnungen 6 mit der Mischkamm er 5 unterbricht und die Innenwand des Zylindergehäuses 2 reinigt.in mixing head 1 according to FIG. 1, a cylinder housing 2, one with two overflow grooves 4 provided control piston 3 and two in the cylinder housing 2 other opposite inlet openings 6 and two also opposite one another Backflow openings 8. The control piston 3 can assume two end positions. In the Drawn (upper) end position is in the area below the control piston 3 a Diischkammei 5 formed, in the high pressure through the inlet openings 6 plastic components enter, mix with each other and via an outlet opening 7 in a Exit mold cavity (directly or via a calming channel). In the lower End position of the control piston 3 are via the inlet openings 6 entering plastic components via the overflow grooves 4 and the return flow openings 8 returned unmixed, the control piston 3 on its way into the lower End position ejects the amount of mixed components in the mixing chamber 5, Furthermore, the connection of the inlet openings 6 with the mixing comb 5 interrupts and cleans the inner wall of the cylinder housing 2.

Seitlich an dieses im Bereich der Eintrittsöffnungen sind zwei Führungsgehäuse 9 für je einen Kolben 10 angeflanscht. Am zur Nischkammer 5 hin gerichteten Ende des Kolbens 10 ist unter Zwischenschaltung eines konischen Ubergangsstücks 11 eine Düsennadel 12 vorgesehen, die mit ihrem Durchmesser in die Austrittsöffnung 6 paßt und mit einer Kerbe 13 versek.t-n ist. Deren Grund ist schräg zur Achse der Austrittsöffnung 6 ausgebildet, und zwar derart, daß je nach Lage der Düsennadel 12 der Durchtrittsquerschnitt zur Mischkammer 5 größer oder kleiner ist. Um den gewünschten Durchtrittsquerschnitt zu erreichen, kann der Kolben 10 über einen Gewindebolzen 14, eine mutter 15 und über ein in den Deckel 16 des Führungsgehäuses geschnittenes Gewinde längs zu seiner Achse verschoben werden. (Sofern es erforderlich ist, daß die Kerbe 13 eine bestim te Drehlage beibehalten soll, wird mittels bekannter Maßnahmen der Kolben 10 drehsicher angeordnet.) Das Führungsgehäuse 9 weist ferner eine Zuführungsöffnung 17 und einen Zuführungskanal 18 für die jeweilige Kunststoffkomponente auf.To the side of this in the area of the inlet openings are two guide housings 9 flanged for one piston 10 each. At the end facing the niche chamber 5 of the piston 10 is with the interposition of a conical transition piece 11 a Nozzle needle 12 is provided, the diameter of which fits into the outlet opening 6 t-n with a notch 13. Their base is oblique to the axis of the outlet opening 6 formed in such a way that, depending on the position of the nozzle needle 12, the passage cross section to the mixing chamber 5 is larger or smaller. To the desired passage cross-section to reach, can the piston 10 via a threaded bolt 14, a nut 15 and a thread cut into the cover 16 of the guide housing be shifted along its axis. (If necessary, the notch 13 is to maintain a certain te rotational position, is by means of known measures Piston 10 arranged in a rotationally secure manner.) The guide housing 9 also has a feed opening 17 and a feed channel 18 for the respective plastic component.

Fig. 2 zeigt einen dem Kolben 10 nach Fig. 1 entsprechenden Kolben 19, dessen Düsennadel 20 mit drei, gleichmäßig über den Umfang verteilten Kerben 21 ausgestattet ist.FIG. 2 shows a piston corresponding to the piston 10 according to FIG. 1 19, whose nozzle needle 20 has three notches evenly distributed over the circumference 21 is equipped.

LeerseiteBlank page

Claims (3)

Düse mit einem willkürlich veränderbaren Querschnitt der Eintrittsöffnung für die Verarbeitung von Reaktionskunststoffen mittels eines SIischkopfes Patentansprüche Düse mit einem willkürlich veränderbaren Querschnit-b der Eintrittsöffnung zu einer Mischkammer zum Einstellen kleiner Durchtrittsmengen für die Verarbeitung von Reaktionskunststoffen mittels eines Mischkopfes, g e k e n n z e i c h n e t d u r c h die Anordnung einer Düsennadel (12, 20), die ir. Nozzle with an arbitrarily variable cross-section of the inlet opening for the processing of reaction plastics by means of a mixer head Nozzle with an arbitrarily variable cross-section b of the inlet opening to a Mixing chamber for setting small flow rates for processing reaction plastics by means of a mixing head, the arrangement of a Nozzle needle (12, 20), the ir. der Eintrittsöffnung (6) verschiebbar ist und die mindestens eine an der Auffenwand der Düsennadel angebrachte, sich etwa über deren Länge in ihrer Tiefe veränderliche Nu-t (Kerbe 13, 21) auSweist. the inlet opening (6) is displaceable and the at least one attached to the Auffenwand of the nozzle needle, about its length in their Depth variable groove (notch 13, 21) has. 2. Düse nach Anspruch 1, d a d u r c h g e k e n n -z e i c h n e t , da3 die Nut als Kerbe (13, 21) ausgebildet ist, deren Grund eine Gerade bildet.2. Nozzle according to claim 1, d a d u r c h g e k e n n -z e i c h n e t, that the groove is designed as a notch (13, 21), the base of which forms a straight line. 3. Risse nach Anspruch 1 oder 2, g e k e n n z e i c h -n e t d u r c h die Anordnung mehrerer, gleichmaßig über den Umfang der Düsennadel verteilter Nute (Kerben 21).3. Cracks according to claim 1 or 2, g e k e n n z e i c h -n e t d u r c h the arrangement of several, evenly distributed over the circumference of the nozzle needle Groove (notches 21).
DE19803000478 1980-01-08 1980-01-08 Adjustable needle nozzle for resin reagents mixer - needle end has tapered longitudinal groove and is adjusted longitudinally Ceased DE3000478A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803000478 DE3000478A1 (en) 1980-01-08 1980-01-08 Adjustable needle nozzle for resin reagents mixer - needle end has tapered longitudinal groove and is adjusted longitudinally

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803000478 DE3000478A1 (en) 1980-01-08 1980-01-08 Adjustable needle nozzle for resin reagents mixer - needle end has tapered longitudinal groove and is adjusted longitudinally

Publications (1)

Publication Number Publication Date
DE3000478A1 true DE3000478A1 (en) 1981-07-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111718A1 (en) * 1982-11-16 1984-06-27 BASF Aktiengesellschaft Device for producing a mixture of at least two synthetics components
DE3522618A1 (en) * 1985-06-25 1987-01-08 Hennecke Gmbh Maschf Mixing head for the continuous production of a flowable, plastic-forming, in particular foam-forming, reaction mixture from at least two flowable reaction components
EP0271803A2 (en) * 1986-12-19 1988-06-22 Bayer Ag Device for mixing at least two flowable reactive components for forming rigid or foamable plastic material

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421542A (en) * 1965-08-24 1969-01-14 Omark Winslow Co Flow regulator
DE1550278A1 (en) * 1966-01-15 1970-01-02 Heyne Gmbh Geb Valve, in particular heater valve
DE1939593A1 (en) * 1969-08-04 1971-02-25 Nalbach Adolf Nikolaus Fine control valve for liquid detergents
DE2065057B2 (en) * 1970-02-20 1977-01-13 Ausscheidung aus: 20 07 935 Ausscheidung in: 20 65 841 Krauss-Maffei AG, 8000 München DEVICE FOR GENERATING A PREFERABLY CHEMICALLY REACTIONABLE MIXTURE FROM PLASTIC COMPONENTS
DE2647990A1 (en) * 1975-10-21 1977-05-05 Euratom DEVICE FOR CONTROLLING THE FLOW OF A FLOWABLE MEDIUM
DE2513492B2 (en) * 1975-03-26 1977-07-28 The Upjohn Co, Kalamazoo, Mich. (V.St.A.) DEVICE FOR MIXING A LIQUID PROPELLER WITH LOW BOILING POINT WITH OTHER COMPONENTS FOR THE PRODUCTION OF FOAM
DE2602669B2 (en) * 1975-01-28 1979-06-07 Secmer S.A., La Tronche (Frankreich) Device for · generating and ejecting a chemically reactive mixture of at least two plastic components
DE2555177B2 (en) * 1975-12-08 1979-08-16 The Upjohn Co., Kalamazoo, Mich. (V.St.A.) Mixing head

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421542A (en) * 1965-08-24 1969-01-14 Omark Winslow Co Flow regulator
DE1550278A1 (en) * 1966-01-15 1970-01-02 Heyne Gmbh Geb Valve, in particular heater valve
DE1939593A1 (en) * 1969-08-04 1971-02-25 Nalbach Adolf Nikolaus Fine control valve for liquid detergents
DE2065057B2 (en) * 1970-02-20 1977-01-13 Ausscheidung aus: 20 07 935 Ausscheidung in: 20 65 841 Krauss-Maffei AG, 8000 München DEVICE FOR GENERATING A PREFERABLY CHEMICALLY REACTIONABLE MIXTURE FROM PLASTIC COMPONENTS
DE2602669B2 (en) * 1975-01-28 1979-06-07 Secmer S.A., La Tronche (Frankreich) Device for · generating and ejecting a chemically reactive mixture of at least two plastic components
DE2513492B2 (en) * 1975-03-26 1977-07-28 The Upjohn Co, Kalamazoo, Mich. (V.St.A.) DEVICE FOR MIXING A LIQUID PROPELLER WITH LOW BOILING POINT WITH OTHER COMPONENTS FOR THE PRODUCTION OF FOAM
DE2647990A1 (en) * 1975-10-21 1977-05-05 Euratom DEVICE FOR CONTROLLING THE FLOW OF A FLOWABLE MEDIUM
DE2555177B2 (en) * 1975-12-08 1979-08-16 The Upjohn Co., Kalamazoo, Mich. (V.St.A.) Mixing head

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111718A1 (en) * 1982-11-16 1984-06-27 BASF Aktiengesellschaft Device for producing a mixture of at least two synthetics components
DE3522618A1 (en) * 1985-06-25 1987-01-08 Hennecke Gmbh Maschf Mixing head for the continuous production of a flowable, plastic-forming, in particular foam-forming, reaction mixture from at least two flowable reaction components
EP0271803A2 (en) * 1986-12-19 1988-06-22 Bayer Ag Device for mixing at least two flowable reactive components for forming rigid or foamable plastic material
EP0271803A3 (en) * 1986-12-19 1988-11-30 Bayer Ag Device for mixing at least two flowable reactive components for forming rigid or foamable plastic material

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