DE3400309A1 - Injection moulding machine for two-component silicone rubber, specifically of RTV grade - Google Patents

Injection moulding machine for two-component silicone rubber, specifically of RTV grade

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Publication number
DE3400309A1
DE3400309A1 DE19843400309 DE3400309A DE3400309A1 DE 3400309 A1 DE3400309 A1 DE 3400309A1 DE 19843400309 DE19843400309 DE 19843400309 DE 3400309 A DE3400309 A DE 3400309A DE 3400309 A1 DE3400309 A1 DE 3400309A1
Authority
DE
Germany
Prior art keywords
component
plastics
nozzle
silicone rubber
specifically
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.)
Withdrawn
Application number
DE19843400309
Other languages
German (de)
Inventor
Peter Balas
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.)
PETER BALAS GmbH
Original Assignee
PETER BALAS GmbH
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Filing date
Publication date
Application filed by PETER BALAS GmbH filed Critical PETER BALAS GmbH
Priority to DE19843400309 priority Critical patent/DE3400309A1/en
Publication of DE3400309A1 publication Critical patent/DE3400309A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/55—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers driven by the moving material
    • 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
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2112—Level of material in a container or the position or shape of the upper surface of the material
    • 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
    • B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
    • 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
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/831—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices using one or more pump or other dispensing mechanisms for feeding the flows in predetermined proportion, e.g. one of the pumps being driven by one of the flows
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/32—Mixing; Kneading continuous, with mechanical mixing or kneading devices with non-movable mixing or kneading devices
    • B29B7/325—Static mixers
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/402—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft using a rotor-stator system with intermeshing elements, e.g. teeth
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B29B7/603—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • 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
    • B29B7/7461—Combinations of dissimilar mixers
    • 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
    • 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
    • B29B7/7476—Systems, i.e. flow charts or diagrams; Plants
    • B29B7/7485—Systems, i.e. flow charts or diagrams; Plants with consecutive mixers, e.g. with premixing some of the components
    • 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
    • B29B7/802—Constructions or methods for cleaning the mixing or kneading device
    • B29B7/803—Cleaning of mixers of the gun type, stream-impigement type, mixing heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/2805—Mixing plastics, polymer material ingredients, monomers or oligomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • B29K2083/005—LSR, i.e. liquid silicone rubbers, or derivatives thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention relates to a process for producing plastic parts from multi-component liquid plastics, the plastics being fed from storage tanks in a metered amount via gear pumps to a mixer and subsequently to the mould via a nozzle, curing being initiated by pressure and/or temperature.

Description

Beschreibung description

Verfahren zur Herstellung von Kunststoffteilen aus mehrkomponentigen flüssigen Kunststoffen Die Erfindung betrifft ein Verfahren zur Herstellung von Kunststoffteilen aus mehrkomponentigen flüssigen Kunststoffen. Process for the production of plastic parts from multi-component liquid plastics The invention relates to a method for the production of Plastic parts made from multi-component liquid plastics.

Es ist bekannt, mehrkomponentige flüssige Kunststoffe, insbesondere 2-Komponentensilikonkautschuk in Spritzgußmaschinen zu verarbeiten. Bei den bekannten Maschinen wurde hierbei die Mischung der mehrkomponentigen Kunststoffe vor ihrer Zufuhr in die Spritzgußmaschine in separaten Dosier- und Mischmaschinen vermischt. Dies führte insbesondere bei schnell reagierenden Kunststoffen zu Produktionsstörungen.It is known, multicomponent liquid plastics, in particular To process 2-component silicone rubber in injection molding machines. With the known Machines was doing the mixing of the multi-component plastics before their Feed into the injection molding machine mixed in separate metering and mixing machines. This led to production disruptions, especially with fast-reacting plastics.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von Kunststoffteilen aus mehrkomponentigen flüssigen Kunststoffen zu schaffen, bei dem unter optimaler Dosierung der Komponenten ihre sichere Vermischung gewährleistet ist und zugleich diese Mischung in für die Verspritzung optimal aufbereitete Weise dem Spritzgußwerkzeug zugeführt wird.The invention is based on the object of a method for production of plastic parts from multi-component liquid plastics to create which guarantees their safe mixing with optimal dosage of the components is and at the same time this mixture in a way that is optimally prepared for spraying is fed to the injection molding tool.

Diese Aufgabe wird erfindungsgemäß einem Verfahren gemäß dem Oberbegriff des Anspruchs 1 durch den kennzeichnenden Teil des Anspruchs 1 gelöst.According to the invention, this object is achieved by a method according to the preamble of claim 1 solved by the characterizing part of claim 1.

Durch die Verwendung von Zahnradpumpen wird eine optimale Dosierung erreicht. In dem nachgeschalteten Mischer erfolgt die Vermengung der verschiedenen Komponenten und die nachgeschaltete Druck- und/oder Temperaturbeaufschlagung der Mischung bewirkt eine optimale Aufbereitung vor der Spritzgußmaschine.The use of gear pumps ensures an optimal dosage achieved. The various mixers are mixed in the downstream mixer Components and the downstream pressure and / or temperature application of the Mixing results in optimal preparation in front of the injection molding machine.

Weitere Merkmale, Vorteile und Anwendungsmöglichkeiten der Erfindung ergeben sich aus dem Ausführungsbeispiel in Verbindung mit der Zeichnung. Hierin zeigt: Fig. 1 einen schematischen Überblick über ein erfindungsgemäßes Verfahren, Fig. 2 eine schematische Darstellung der Dosiereinheit Fig. 3 und 4 schematische Darstellungen des Mischers, Fig. 5 eine schematische Darstellung der Spritzdüse Fig. 6 eine schematische Darstellung der Membranpresse.Further features, advantages and possible uses of the invention result from the exemplary embodiment in conjunction with the drawing. Here in shows: Fig. 1 a schematic overview of a method according to the invention, 2 shows a schematic representation of the metering unit; FIGS. 3 and 4 show a schematic Representations of the mixer, FIG. 5 a schematic representation of the spray nozzle 6 shows a schematic representation of the membrane press.

Fig. 1 zeigt eine schematische Übersicht des erfindungsgemäßen Verfahrens.1 shows a schematic overview of the method according to the invention.

Die Komponente A gelangt vom Behälter (16a) mittels hydraulisch angetriebener Zahnradpumpen (la) in den GIasbehälter (18a). Die Komponente B ebenfalls mittels Zahnradpumpe (ib) in den Glasbehälter (18b).The component A comes from the container (16a) by means of hydraulically driven Gear pumps (la) in the glass container (18a). Component B also means Gear pump (ib) into the glass container (18b).

Eine dritte Komponente kann von Hand in den Behälter (17) eingefüllt werden. In den Behältern 16a und 16b befindet sich vor den Zahnradpumpen 1a und Ib je ein Sperrventil 5a bzw. 5b. In den Behältern 18a und 18b wird der Füllungsgrad mittels Sensoren (10) kontrolliert und beim Erreichen der eingestellten Minimal- und Maximalfüllungen die Füllpumpen ein- bzw. abgeschaltet. Von den Behältern 18a, 18b und 17 gelangen die einzelnen Komponenten über Dreiwegventile (6) in die Dosierungseinheiten (3). Mittels der Zahnradpumpe (2) werden die Komponenten zum Mischer (4) gefördert.A third component can be filled into the container (17) by hand will. In the containers 16a and 16b is located in front of the gear pumps 1a and Ib each have a check valve 5a or 5b. The filling level is set in the containers 18a and 18b controlled by sensors (10) and when the set minimum and maximum fillings, the filling pumps are switched on and off. From the containers 18a, 18b and 17, the individual components arrive via three-way valves (6) into the dosage units (3). By means of the gear pump (2) the components promoted to the mixer (4).

Im Mischer (4), der sowohl statisch - dynamisch als auch nur dynamisch sein kann, erfolgt die Mischung. Das Gemisch gelangt unter Druck in die Düse (13), die durch den Zylinder (19) geschlossen werden kann. Durch diesen Zylinder (19) wird die Düse (13) an die Einspritzbuchse gepreßt.In the mixer (4), which is both static - dynamic and only dynamic can be, the mixture takes place. The mixture enters the nozzle (13) under pressure, which can be closed by the cylinder (19). Through this cylinder (19) the nozzle (13) is pressed against the injection socket.

Die beiden Formhälften werden durch eine Membranepresse (21) geschlossen.The two mold halves are closed by a membrane press (21).

Das Gesamtsystem wird durch die Vacuumpumpe (15) über das Zweiwegventil (9) ausvacuiert.The entire system is activated by the vacuum pump (15) via the two-way valve (9) evacuated.

Durch die Spüleinrichtung (11) wird wechselweise Reinigungsflüssigkeit und Luft durch das Gesamtsystem mit Ausnahme der Behälter 18a, 18b und 17 geleitet.The rinsing device (11) alternately supplies cleaning fluid and air is passed through the entire system with the exception of containers 18a, 18b and 17.

Funktionsbeschreibung Dosiereinheit (3) Die Komponente treibt das Turbinenrad (3.1) auf dessen Achse (3.2) die Stroboskopscheibe (3.3) durch die optoelektronische Einheit (3.4) abgetastet wird. Die durch die Abtasteinheit (3.4) aufgenommenen Impulse werden über einen Microcomputer ausgewertet und mittels Programm zur Steuerung der Ventile 6a und 6b verwendet. Die Mischverhältnisse sind im Verhältnis 1:1 bis 1:9 voreinstellbar.Functional description of the dosing unit (3) The component drives the Turbine wheel (3.1) on its axis (3.2) the stroboscopic disc (3.3) through the optoelectronic Unit (3.4) is scanned. The pulses picked up by the scanning unit (3.4) are evaluated by a microcomputer and by means of a program to control the Valves 6a and 6b are used. The mixing ratios are in the ratio 1: 1 to 1: 9 presettable.

Funktionsbeschreibung statisch - dynamischer Mischer (4a) für Medien mit zwei verschieden hohen Viskositäten Um eine totale homogene Mischung zu erreichen, erfolgt unser Mischvorgang in zwei Schritten: Dynamischer Mischvorgang: In die Zwischenkreisringfläche strömt die Komponente A (mit höherer Viskosität) unter Druck und strömt turbulent über die Turbinendüse, welche sich dadurch dreht (abhängig vom Druck). Damit wird ein gleichmäßiger Strömungsquerschnitt für die Komponente A erzielt.Functional description of static-dynamic mixer (4a) for media with two different viscosities To achieve a completely homogeneous mixture, Our mixing process takes place in two steps: Dynamic mixing process: In the intermediate circular ring area Component A (with a higher viscosity) flows under pressure and flows in a turbulent manner above the turbine nozzle, which rotates as a result (depending on the pressure). This becomes a A uniform flow cross-section for component A is achieved.

Durch die Turbinendüse strömt Komponente B turbulent (mit kleinerer Viskosität als Komponente A). Die Turbinendüse mit Komponente B ist durch Komponente A angetrieben. Die durch den Turbinenritzel gedrehte Düse verteilt die Komponente B aus mehreren Löchern am Ende der Düse über den ganzen Strömungsquerschnitt von Komponente A und vermischt so die mit eingeführte Komponente B mit der Komponente A auf blasenfreie und homogene Art.Component B flows through the turbine nozzle in a turbulent manner (with a smaller Viscosity as component A). The turbine nozzle with component B is through component A driven. The nozzle rotated by the turbine pinion distributes the component B from several holes at the end of the nozzle over the entire flow cross-section of Component A and thus mixes the component B introduced with the component A in a bubble-free and homogeneous way.

Durch die Strömung von Komponente A und Verkleinerung des Querschnittes an der Turbinendüse nimmt Komponente A an Geschwindigkeit zu und vermischt sich homogen mit der turbulenteingeführten Komponente B niedrigerer Viskosität.Due to the flow of component A and a reduction in the cross-section component A increases in speed and mixes at the turbine nozzle homogeneous with the turbulent-induced component B of lower viscosity.

Statischer Mischvorgang: In das statische Abteil des Mischers gelangen beide Medien schon vorgemischt. Das statische Abteil besteht aus Zahnscheiben von einer Stärke zwischen 0,5 bis 1,5 mm, mit äußerer und innerer Verzahnung, die schlichtenweise aufeinander gelegt sind.Static mixing process: Get into the static compartment of the mixer both media already mixed. The static compartment consists of tooth lock washers from a thickness between 0.5 to 1.5 mm, with external and internal toothing, the finishing are placed on top of each other.

Durch diese Anordnung von Scheiben werden beide schon vorgemischten Komponenten zerschnitten über den ganzen Strömungsquerschnitt ausgebreitet und die Schichtanzahl nimmt zu. Damit werden kontinuierlich und homogen beide Komponenten vermischt.This arrangement of slices means that both are already premixed Components cut across the entire flow cross-section and spread the Number of layers increases. This makes both components continuous and homogeneous mixed.

Dieser ganze Mischvorgang verläuft im Vacuum, dadurch ist gewährleistet, daß beide vermischten Komponenten blasenfrei herauskommen.This entire mixing process takes place in a vacuum, which ensures that both mixed components come out bubble-free.

Funktionsbeschreibung dynamischer Mischer (4 b) Im Gehäuse (1), in dem zylindrische um 906 versetzte Stifte (3) sitzen, dreht sich die Welle (2), die ebenfalls mit Stiften (4) versehen ist.Functional description of dynamic mixer (4 b) In the housing (1), in the cylindrical pins (3) offset by 906, the shaft (2) rotates, the also with Pins (4) is provided.

Die Komponenten A und B werden unter Druck über die Anschlüsse (5 und 6) über den ganzen Strömungsquerschnitt des Gehäuses zugeführt.Components A and B are pressurized via the connections (5 and 6) supplied over the entire flow cross-section of the housing.

Der Strömungsquerschnitt wird durch die Drehung der Achse (2) mit ihren Zapfen (4) kontinuierlich verändert und die dadurch hervorgerufene Turbulenz zerschneidet die Komponentenströme und mischt sie homogen und blasenfrei bei Drehzahlen von 50 - 300 U/min.The flow cross-section is determined by the rotation of the axis (2) their pin (4) continuously changes and the resulting turbulence cuts the component streams and mixes them homogeneously and without bubbles at speeds from 50 - 300 rpm.

Das Gehäuse (1), die Welle (2), sowie sämtliche Zapfen in Gehäuse und Welle sind aus Nirostastahl gefertigt.The housing (1), the shaft (2) and all pins in the housing and shaft are made of stainless steel.

Spritzdüse (13) Im Nirostagehäuse (1) ist der Luftzylinder (2) befestigt und betätigt die Nadel (3).Spray nozzle (13) The air cylinder (2) is attached to the stainless steel housing (1) and actuates the needle (3).

Das aus Komponenten A und B bestehende Gemisch wird über Anschluß (5) unter Druck zugeführt und die Nadel (3), die mittels der aus Silikonkautschuk bestehenden Membrane (6) gegenüber der Druckfeder (4) abgedichtet ist, wird durch diesen Druck angehoben und gibt dadurch die Einspritzöffnung frei. Nach Beendigung des Spritzvorganges drückt der Zylinder (2)die Nadel 3 auf die Einspritzöffnung.The mixture consisting of components A and B is connected via the connection (5) fed under pressure and the needle (3) which is made of silicone rubber by means of the existing diaphragm (6) is sealed against the compression spring (4) is through this pressure is raised, thereby releasing the injection opening. After completion During the injection process, the cylinder (2) presses the needle 3 onto the injection opening.

Hierdurch wird unnötiger Materialverlust vermieden.This avoids unnecessary loss of material.

Membranpresse (21) Die Presse besteht aus zwei Grundplatten (5 und 6) sowie zwei Distanzleisten (4).Membrane press (21) The press consists of two base plates (5 and 6) and two spacer bars (4).

Auf der Grundplatte (6) ist eine Membrane (1) aus Kombination von Kupfer- und Federstahlfolie von 0,1 - 0,3 mm Stärke befestigt. Die Folie ist mit dem Stempel (2) verschraubt.On the base plate (6) there is a membrane (1) made of a combination of Copper and spring steel foil 0.1-0.3 mm thick attached. The slide is with screwed to the punch (2).

Die Membrane (1) hat zwei Funktionen: - Druckelement - sie ersetzt den Kolben.The membrane (1) has two functions: - pressure element - it replaces the piston.

- Dichtelement - sie ersetzt die Dicht- und Abstreifringe.- Sealing element - it replaces the sealing and scraper rings.

Der Vorteil der Membranepresse liegt in ihrer geometrischen Unabhängigkeit gegenüber der an kreisförmige Querschnitte gebundenen Kolbenfläche. Der Hub ist auf 3 mm begrenzt, der Schließdruck beträgt 175 000 kp bei 330 Atü, was für die Verarbeitung von Silikonkautschuk vollkommen ausreichend ist.The advantage of the membrane press lies in its geometric independence compared to the piston area bound to circular cross-sections. The hub is limited to 3 mm, the closing pressure is 175,000 kp at 330 Atü, what for the Processing of silicone rubber is completely sufficient.

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Claims (4)

Patentansprüche 1. Verfahren zur Herstellung von Kunststoffteilen aus mehrkomponentigen flüssigen Kunststoffen, d a d u r c h g ek e n n z e i c h n e t, daß die kunststoffe aus Vorratsbehältern (16a,16b) dosiert über Zahnradpumpen (1a,1b) einem Mischer (4) und anschließend dem Formwerkzeug über eine Düse (13) zugeführt werden, wobei durch Druck und/oder Temperatur die Aushärtung eingeleitet wird. Claims 1. A method for producing plastic parts made of multi-component liquid plastics, d u r c h ek e n n n z e i c h n e t that the plastics from storage containers (16a, 16b) are dosed via gear pumps (1a, 1b) a mixer (4) and then the molding tool via a nozzle (13) are supplied, the curing being initiated by pressure and / or temperature will. 2. Verfahren zur Herstellung von Kunststoffteilen aus einkomponentigen flüssigen Kunststoffen, dadurch gekennzeich-(16a) net, daß der Kunststoff aus einem Vorratsbehälter uber eine Zahnradpum#m Formwerkzeug über eine Düs geführt wird, wobei anschließend im Formwerkzeug durch Druck und/oder Temperatur die Aushärtung eingeleitet wird.2. Process for the production of plastic parts from one-component liquid plastics, characterized in that the plastic consists of a Storage container is guided via a gear pump molding tool via a nozzle, then curing in the mold by pressure and / or temperature is initiated. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Formwerkzeug zum Zeitpunkt der Einspritzung des oder der Kunststoffe und in der Zeit der Aushärtunq durch eine Vorrichtung (24) geschlossen gehalten wird.3. The method according to claim 1 or 2, characterized in that the Mold at the time of injection of the plastic or plastics and in the Time of curing is kept closed by a device (24). 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Dosierung der Kunststoffe in Abhängigkeit von der Umdrehungszahl der zugehörigen Zahnradpump e folgt.4. The method according to claim 1, characterized in that the dosage of the plastics depending on the number of revolutions of the associated gear pump e follows.
DE19843400309 1984-01-05 1984-01-05 Injection moulding machine for two-component silicone rubber, specifically of RTV grade Withdrawn DE3400309A1 (en)

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DE19843400309 DE3400309A1 (en) 1984-01-05 1984-01-05 Injection moulding machine for two-component silicone rubber, specifically of RTV grade

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235639A1 (en) * 1992-10-22 1994-04-28 Sonderhoff Ernst Fa Process for the production of silicone foam molded parts by injection molding
USRE35771E (en) * 1992-10-22 1998-04-14 H. B. Fuller Licensing & Financing, Inc. Process for producing a fine pored silicone foam
EP0904927A1 (en) * 1997-09-25 1999-03-31 Engel Maschinenbau Gesellschaft m.b.H. Apparatus for injecting plastics consisting of at least two constituting components in a mould
DE19831122A1 (en) * 1998-07-11 2000-01-13 Felten & Guilleaume Kabelwerk Equipment producing moldings from two-component silicon rubber hardening at high temperature
DE10024620A1 (en) * 2000-05-18 2001-09-06 Wacker Chemie Gmbh Dosing equipment for polymer injection molding machines, comprises four rotary positive displacement pumps in series-parallel connection, feeding mixer
WO2001072861A2 (en) * 1999-11-12 2001-10-04 Ten Cate Enbi International Apparatus for mixing and injection molding thermosetting polyurethane
EP1249328A1 (en) * 2001-04-12 2002-10-16 Bayerische Motoren Werke Aktiengesellschaft Deformable mat for producing three-dimensional parts and method of its production
EP1407872A1 (en) * 2002-10-08 2004-04-14 Pietro Galbusera Apparatus for preparing two-component silicone
EP1447207A1 (en) * 2003-02-13 2004-08-18 M. Huber I.T.S. GmbH Apparatus and method for injection molding a part
US7229584B2 (en) 2001-09-14 2007-06-12 Demag Ergotech Gmbh Method and apparatus for injection molding multi-component mixtures
EP2123349A3 (en) * 2008-05-21 2010-10-27 Hitachi Plant Technologies, Ltd. Emulsification device
CN102350772A (en) * 2011-08-24 2012-02-15 佘晓峰 Multicolor co-injection combined full-electric rubber injection mould machine
WO2015038364A1 (en) * 2013-09-16 2015-03-19 Dow Global Technologies Llc Mixing device for two component polyurethane foam formulation

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35771E (en) * 1992-10-22 1998-04-14 H. B. Fuller Licensing & Financing, Inc. Process for producing a fine pored silicone foam
DE4235639A1 (en) * 1992-10-22 1994-04-28 Sonderhoff Ernst Fa Process for the production of silicone foam molded parts by injection molding
EP0904927A1 (en) * 1997-09-25 1999-03-31 Engel Maschinenbau Gesellschaft m.b.H. Apparatus for injecting plastics consisting of at least two constituting components in a mould
DE19831122B4 (en) * 1998-07-11 2006-01-19 Nkt Cables Gmbh Arrangement and method for processing silicone rubber
DE19831122A1 (en) * 1998-07-11 2000-01-13 Felten & Guilleaume Kabelwerk Equipment producing moldings from two-component silicon rubber hardening at high temperature
WO2001072861A2 (en) * 1999-11-12 2001-10-04 Ten Cate Enbi International Apparatus for mixing and injection molding thermosetting polyurethane
WO2001072861A3 (en) * 1999-11-12 2002-02-28 Ten Cate Enbi Internat Apparatus for mixing and injection molding thermosetting polyurethane
DE10024620A1 (en) * 2000-05-18 2001-09-06 Wacker Chemie Gmbh Dosing equipment for polymer injection molding machines, comprises four rotary positive displacement pumps in series-parallel connection, feeding mixer
EP1249328A1 (en) * 2001-04-12 2002-10-16 Bayerische Motoren Werke Aktiengesellschaft Deformable mat for producing three-dimensional parts and method of its production
US7229584B2 (en) 2001-09-14 2007-06-12 Demag Ergotech Gmbh Method and apparatus for injection molding multi-component mixtures
EP1407872A1 (en) * 2002-10-08 2004-04-14 Pietro Galbusera Apparatus for preparing two-component silicone
EP1447207A1 (en) * 2003-02-13 2004-08-18 M. Huber I.T.S. GmbH Apparatus and method for injection molding a part
EP2123349A3 (en) * 2008-05-21 2010-10-27 Hitachi Plant Technologies, Ltd. Emulsification device
CN102350772A (en) * 2011-08-24 2012-02-15 佘晓峰 Multicolor co-injection combined full-electric rubber injection mould machine
WO2015038364A1 (en) * 2013-09-16 2015-03-19 Dow Global Technologies Llc Mixing device for two component polyurethane foam formulation
US10322385B2 (en) 2013-09-16 2019-06-18 Dow Global Technologies Llc Mixing device for two component polyurethane foam formulation

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