DE20320505U1 - Extruder for blending plastic with hollow micro-spheres comprises a twin-screw extruder with twin-extruder side feed followed by vacuum de-gassing section - Google Patents

Extruder for blending plastic with hollow micro-spheres comprises a twin-screw extruder with twin-extruder side feed followed by vacuum de-gassing section Download PDF

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Publication number
DE20320505U1
DE20320505U1 DE20320505U DE20320505U DE20320505U1 DE 20320505 U1 DE20320505 U1 DE 20320505U1 DE 20320505 U DE20320505 U DE 20320505U DE 20320505 U DE20320505 U DE 20320505U DE 20320505 U1 DE20320505 U1 DE 20320505U1
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Germany
Prior art keywords
extruder
zone
housing
twin
plastic
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Expired - Lifetime
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DE20320505U
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German (de)
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Coperion GmbH
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Coperion GmbH
Coperion Werner and Pfleiderer GmbH and Co KG
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Priority to DE20320505U priority Critical patent/DE20320505U1/en
Priority claimed from DE10342822.4A external-priority patent/DE10342822B4/en
Publication of DE20320505U1 publication Critical patent/DE20320505U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • 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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • 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
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
    • B29C48/37—Gear pumps
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
    • B29C70/66—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres the filler comprising hollow constituents, e.g. syntactic foam
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/297—Feeding the extrusion material to the extruder at several locations, e.g. using several hoppers or using a separate additive feeding
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
    • 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
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B29K2105/165—Hollow fillers, e.g. microballoons or expanded particles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Plastic material is fed (14) to a twin-screw extruder (11, 12) fitted with a mixing and kneading section (25). Further downstream is a side feed for hollow micro-spheres through another twin-screw extruder (36, 37) with a further mixing section (28). Finally there is a de-gassing section with a vacuum connection (52), the material being held back by a retaining extruder (45).

Description

Die Erfindung betrifft einen Extruder zum Herstellen von syntaktischem Kunststoff durch Vermischen von Kunststoff und Mikro-Hohl-Kugeln.The The invention relates to an extruder for producing syntactic Plastic by mixing plastic and micro hollow balls.

Syntaktische Kunststoffe sind aus der DE 101 29 232 A1 (entsprechend WO 02/102887 A1) bekannt. Hierunter versteht man im Allgemeinen Kunststoffe, die hohle Füllstoffe aufweisen, beispielsweise also Mikro-Hohl-Kugeln aus Glas oder dergleichen. Derartige syntaktische Kunststoffe werden als Isolierbeschichtungen eingesetzt. Bei dem aus der DE 101 29 232 A1 (entsprechend WO 02/102887 A1) bekannten Verfahren werden in einem ersten Schritt Polyurethansystemkomponenten zur Reaktion gebracht und in einem zweiten Schritt Mikro-Hohl-Kugeln in einer Mischvorrichtung zugegeben, wobei die Mischvorrichtung totraumfrei aufgebaut ist aus einem trichterförmigen Mischtopf, einem Zulauf für Polyurethan, einem Zulauf für Mikro-Hohl-Kugeln, einem Rührorgan und einer Austrittsöffnung. Hierbei ist es wichtig, dass möglichst große Mengenanteile der bruchempfindlichen Mikro-Hohl-Kugeln gleichmäßig und unter möglichst geringem Bruch und hoher Einarbeitungsgeschwindigkeit in den Kunststoff eingemischt werden. Das aus Kunststoff und Mikro-Hohl-Kugeln bestehende Gemisch soll möglichst frei von Lufteinschlüssen sein. Diese Forderungen werden bei dem bekannten Verfahren und der bekannten Vorrichtung nicht zufriedenstellend erfüllt.Syntactic plastics are made of DE 101 29 232 A1 (corresponding to WO 02/102887 A1). This is generally understood to mean plastics which have hollow fillers, for example micro-hollow balls made of glass or the like. Such syntactic plastics are used as insulating coatings. The one from the DE 101 29 232 A1 Known methods (corresponding to WO 02/102887 A1) are reacted with polyurethane system components in a first step and micro-hollow balls are added in a mixing device in a second step, the mixing device being constructed without dead space from a funnel-shaped mixing pot, an inlet for polyurethane, an inlet for hollow micro spheres, a stirrer and an outlet. It is important here that the largest possible proportions of the break-sensitive micro hollow spheres are mixed into the plastic evenly and with the least possible breakage and high incorporation speed. The mixture consisting of plastic and micro-hollow spheres should be as free as possible from air pockets. These requirements are not met satisfactorily in the known method and the known device.

Der Erfindung liegt die Aufgabe zugrunde, einen Extruder zum Herstellen von syntaktischem Kunststoff durch Vermischen von Kunststoff und Mikro-Hohl-Kugeln zu schaffen, der die gestellten Forderungen erfüllt.The The object of the invention is to produce an extruder of syntactic plastic by mixing plastic and To create micro hollow spheres that meet the requirements.

Die der Erfindung zugrundeliegende Aufgabe wird durch einen Extruder mit den Merkmalen des Anspruches 1 gelöst.The The object underlying the invention is achieved by an extruder solved with the features of claim 1.

Durch erfindungsgemäßen Einsatz eines Zwei-Wellen-Extruders und dessen Ausgestaltung wird erreicht, dass ein schnelles, schonendes Einmischen der Mikro-Hohl-Kugeln in den Kunststoff erfolgt und dass hierbei nur geringer Bruch entsteht. Das Gemisch aus Kunststoff und Mikro-Hohl-Kugeln ist luftfrei und verfügt daher über gute thermische und mechanische Eigenschaften, insbesondere niedrige Wärmeleitfähigkeit, geringe Dichte und hohe Druckfestigkeit. Das Gemisch aus Kunststoff und Mikro-Hohl-Kugeln kann direkt weiterverarbeitet werden, und zwar in einer Wärme, so dass keine Beschädigung oder Zerstörung der Mikro-Hohl-Kugeln durch einen erneuten Aufschmelzprozess erfolgt.By use according to the invention of a two-shaft extruder and its design is achieved that a quick, gentle mixing of the micro hollow balls in the plastic and that there is only a small break. The Mixture of plastic and micro hollow balls is air-free and therefore has good ones thermal and mechanical properties, especially low thermal conductivity, low density and high pressure resistance. The mixture of plastic and micro hollow balls can be processed directly, and in a heat, so that no damage or destruction of the micro hollow balls through a new melting process.

Es ist besonders vorteilhaft, wenn gemäß Anspruch 3 der aufgeschmolzene Kunststoff vor der Zuführung der Mikro-Hohl-Kugeln insbesondere atmosphärisch entgast wird und wenn gemäß Anspruch 4 das Gemisch aus Kunststoff und Mikro-Hohl-Kugeln vakuumentgast wird.It is particularly advantageous if, according to claim 3, the melted Plastic before feeding the micro hollow spheres are degassed in particular atmospheric and if according to claim 4 the mixture of plastic and micro-hollow spheres is vacuum-degassed becomes.

Weitere vorteilhafte Einzelheiten des Extruders ergeben sich aus den weiteren Ansprüchen.Further advantageous details of the extruder result from the others Claims.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung. Es zeigtFurther Features, advantages and details of the invention result from the following description of an embodiment using the Drawing. It shows

1 eine Draufsicht auf einen Extruder nach der Erfindung in teilweise aufgebrochener Darstellung, 1 2 shows a plan view of an extruder according to the invention in a partially broken away illustration,

2 eine Seitenansicht des Extruders in teilweise aufgebrochener Darstellung mit einer abgewandelten Anordnung einer Rückhalte-Schneckenmaschine, 2 2 shows a side view of the extruder in a partially broken-open representation with a modified arrangement of a retaining screw machine,

3 einen vertikalen Querschnitt durch den Extruder mit einer Anordnung der Rückhalte-Schneckenmaschine gemäß 1, 3 a vertical cross section through the extruder with an arrangement of the retaining screw machine according to 1 .

4 einen vertikalen Querschnitt durch den Extruder mit einer Anordnung der Rückhalte-Schneckenmaschine nach 2 und 4 a vertical cross section through the extruder with an arrangement of the retaining screw machine after 2 and

5 eine Seiten-Längs-Ansicht einer dem Extruder nachzuordnenden Zahnrad-Pumpen-Anordnung. 5 a side-longitudinal view of a gear pump arrangement to be arranged after the extruder.

Das in der Zeichnung dargestellte Ausführungsbeispiel weist einen Extruder 1 auf. Er wird mittels eines Motors 2 über eine Kupplung 3 und ein Getriebe 4 angetrieben. Der Extruder 1 weist ein mit einer Heizung 5 versehenes Gehäuse 6 auf, in dem zwei etwa 8-förmig ineinander greifende Gehäuse-Bohrungen 7, 8 mit zueinander parallelen Achsen 9, 10 ausgebildet sind. In diesen Gehäuse-Bohrungen 7, 8 sind zwei Schnecken-Wellen 11, 12 angeordnet, die an das Getriebe 4 angekoppelt sind. Die Schnecken-Wellen 11, 12 werden gleichsinnig angetrieben. Der Extruder 1 weist einen in einer Förderrichtung 13 hinter dem Getriebe 4 angeordneten Zuführ-Trichter 14 auf, durch den aufzubereitender Kunststoff zugeführt wird oder aufzubereitende Kunststoffe zugeführt werden, und an den sich eine Einzugs-Zone 15 anschließt. Im Anschluss daran ist eine Aufschmelz-Zone 16 ausgebildet. Der Aufschmelz-Zone 16 folgt eine Atmosphären-Entgasungs-Zone 17. Im Anschluss daran ist eine Füllstoff-Zuführ-Zone 18 ausgebildet, an die sich eine Füllstoff-Einmisch-Zone 19 anschließt. Je nach dem Anteil der als Füllstoff zuzuführenden Mikro-Hohlkugeln sind mehrere Füllstoff-Zuführ-Zonen mit jeweils nachgeordneter Füllstoff-Einmisch-Zone und stromaufwärts angeordneter atmosphärischer Entgasung vorgesehen. Dieser Einmisch-Zone 19 folgt eine Rückstau-Zone 20, hinter der sich eine Vakuum-Entgasungs-Zone 21 befindet. Daran schließt sich eine Druckaufbau-Zone 22 und daran eine Austrags-Zone 23 an.The embodiment shown in the drawing has an extruder 1 on. It is powered by an engine 2 via a clutch 3 and a gear 4 driven. The extruder 1 has one with a heater 5 provided housing 6 in which two approximately 8-shaped interlocking housing bores 7 . 8th with axes parallel to each other 9 . 10 are trained. In these housing holes 7 . 8th are two snail waves 11 . 12 arranged to the gearbox 4 are coupled. The snail waves 11 . 12 are driven in the same direction. The extruder 1 has one in a conveying direction 13 behind the gearbox 4 arranged feed hopper 14 on, through which plastic to be processed is supplied or plastics to be processed are supplied, and to which there is a feed zone 15 followed. This is followed by a melting zone 16 educated. The melting zone 16 follows an atmospheric degassing zone 17 , Following is a filler feed zone 18 trained to which there is a filler mixing zone 19 followed. Depending on the proportion of the hollow microspheres to be supplied as filler, a plurality of filler supply zones are provided, each with a filler mixing zone arranged downstream and atmospheric degassing arranged upstream. This meddling zone 19 follows one Backwater zone 20 , behind which there is a vacuum degassing zone 21 located. This is followed by a pressure build-up zone 22 and there is a discharge zone 23 on.

In der Einzugs-Zone 15 weisen die Schnecken-Wellen 11, 12 Schnecken-Elemente 24 auf. In der Aufschmelz-Zone 16 sind sie mit Knet-Elementen 25 versehen. In der Atmosphären-Entgasungs-Zone 17 und der sich daran anschließenden mindestens einen Füllstoff-Zuführ-Zone 18 sind wiederum Schnecken-Elemente 26 vorgesehen. Außerdem mündet aus der Atmosphären-Entgasungs-Zone 17 aus dem Gehäuse 6 eine Entgasungs-Öffnung 27 aus, durch die der aufgeschmolzene Kunststoff gegen Atmosphärendruck entgast wird. In der Füllstoff-Einmisch-Zone 19 sind die Schnecken-Wellen 11, 12 mit als sogenannte Schulterscheiben ausgebildeten Misch-Elementen 28 versehen, wie sie aus der EP 0 875 356 (entsprechend US 6,048,088 ) bekannt sind, die besonders scherspitzenarm und selbstreinigend sind. In der Rückstau-Zone 20 sind Stau-Elemente 29 in Form von Rückförder-Schnecken-Elementen oder dergleichen vorgesehen. In der Vakuum-Entgasungs-Zone 21, der nachfolgenden Druckaufbau-Zone 22 und der Austrags-Zone 23 sind wiederum Schnecken-Elemente 30 vorgesehen. An die Druckaufbau-Zone 22 und die Austrags-Zone 23 schließt sich eine Düse 31 an.In the catchment area 15 point the snail waves 11 . 12 Screw elements 24 on. In the melting zone 16 they are with kneading elements 25 Mistake. In the atmosphere degassing zone 17 and the adjoining at least one filler feed zone 18 are in turn snail elements 26 intended. It also flows out of the atmospheric degassing zone 17 out of the housing 6 a vent opening 27 through which the melted plastic is degassed against atmospheric pressure. In the filler mixing zone 19 are the snail waves 11 . 12 with mixing elements designed as so-called shoulder disks 28 provided as from the EP 0 875 356 (corresponding US 6,048,088 ) are known that are particularly low in shear tips and self-cleaning. In the backflow zone 20 are congestion elements 29 provided in the form of return screw elements or the like. In the vacuum degassing zone 21 , the subsequent pressure build-up zone 22 and the discharge zone 23 are in turn snail elements 30 intended. To the pressure build-up zone 22 and the discharge zone 23 a nozzle closes 31 on.

In der Füllstoff-Zuführ-Zone 18 mündet eine Beschickungs-Schneckenmaschine 32 radial zur Achse 9 in eine Gehäuse-Bohrung 7 ein. Sie weist einen Antriebs-Motor 33 auf, der über eine Kupplung 34 mit einem Getriebe 35 gekoppelt ist, von dem zwei dicht miteinander kämmende Förder-Schnecken 36, 37 gleichsinnig angetrieben werden. Die Förderschnecken 36, 37 sind in ebenfalls 8-förmig einander durchdringenden Gehäuse-Bohrungen 38, 39 angeordnet, die durch eine Füllstoff-Zuführ-Öffnung 40 im Gehäuse 6 in die Gehäuse-Bohrung 7 einmünden und bis in die Nähe der Schnecken-Elemente 26 reichen. Benachbart zum Getriebe 35 ist ein Füllstoff-Zuführ-Trichter 41 vorgesehen, der in die Gehäuse-Bohrungen 38, 39 einmündet. Mittels der Beschickungs-Schnecken-Maschine 32 wird zuzugebender Füllstoff, nämlich Mikro-Hohl-Kugeln 42 zugeführt und in der Füllstoff-Zuführ-Zone 18 des Extruders 1 in den aufgeschmolzenen Kunststoff eingegeben. Der Zuführ-Trichter 41 ist zweckmäßiger Weise geteilt ausgebildet. Die Zugabe der Mikro-Hohl-Kugeln 42 erfolgt über ein erstes Trichter-Abteil 43, das sich auf der die Kugeln 42 ergreifenden Seite der Förder-Schnecken 36, 37 befindet. Der Trichter 41 weist ein zweites Trichter-Abteil 44 auf, in dem sich die Förder-Schnecken 36, 37 gleichsam nach oben drehen; durch dieses zweite Trichter-Abteil 44 erfolgt noch eine weitere atmosphärische Entgasung, und zwar insbesondere der Luft, die mit den Mikro-Hohl-Kugeln 42 in die Beschickungs-Schnecken-Maschine 32 gelangt ist. Das Einmischen der Mikro-Hohl-Kugeln 42 in der Füllstoff-Einmisch-Zone 19 in den bereits aufgeschmolzenen Kunststoff erfolgt außerordentlich schonend mittels der als Schulterscheiben ausgebildeten Misch-Elemente 28.In the filler feed zone 18 opens a feeding screw machine 32 radial to the axis 9 in a housing bore 7 on. It has a drive motor 33 on that via a clutch 34 with a gear 35 is coupled, of which two closely intermeshing conveyor screws 36 . 37 are driven in the same direction. The screw conveyors 36 . 37 are also 8-shaped penetrating housing bores 38 . 39 arranged through a filler feed opening 40 in the housing 6 in the housing bore 7 flow into and close to the snail elements 26 pass. Adjacent to the gearbox 35 is a filler hopper 41 provided that in the housing holes 38 . 39 opens. By means of the feed screw machine 32 becomes filler to be added, namely micro hollow spheres 42 fed and in the filler feed zone 18 of the extruder 1 entered into the melted plastic. The feed hopper 41 is expediently divided. The addition of the micro-hollow balls 42 takes place via a first hopper compartment 43 that is on the balls 42 gripping side of the conveyor screws 36 . 37 located. The funnel 41 has a second hopper compartment 44 on, in which the conveyor snails 36 . 37 as it were turn up; through this second hopper compartment 44 there is yet another atmospheric degassing, especially the air that comes with the micro-hollow spheres 42 into the feeding screw machine 32 has arrived. The mixing of the micro hollow balls 42 in the filler mixing zone 19 in the already melted plastic is done extremely gently using the mixing elements designed as shoulder disks 28 ,

Der aufgeschmolzene Kunststoff, in dem die Mikro-Hohl-Kugeln 42 gleichmäßig verteilt sind, wird anschließend in der Vakuum-Entgasungs-Zone 21 unter Vakuum entgast. Hierzu ist eine einwellige oder zweiwellige Rückhalte-Schnecken-Maschine 45 vorgesehen, die einen Antriebs-Motor 46 aufweist, der über eine Kupplung 47 mit einem Getriebe 48 gekoppelt ist. Mit diesem ist eine Rückhalte-Schnecke 49 drehfest verbunden, die in einer Bohrung 50 eines Gehäuses 51 der Maschine 45 angeordnet ist. Die Bohrung 50 mündet in den Extruder 1 ein. Benachbart zum Getriebe 48 weist das Gehäuse 51 einen in die Bohrung 50 einmündenden Vakuum-Anschluss 52 auf. Die Schnecke 49 reicht bis an die Schnecken-Elemente 30 heran.The melted plastic in which the micro-hollow balls 42 are evenly distributed in the vacuum degassing zone 21 degassed under vacuum. A single-shaft or double-shaft retaining screw machine is used for this 45 provided a drive motor 46 has, via a clutch 47 with a gear 48 is coupled. With this is a retention snail 49 non-rotatably connected in a hole 50 of a housing 51 the machine 45 is arranged. The hole 50 flows into the extruder 1 on. Adjacent to the gearbox 48 points the case 51 one in the hole 50 merging vacuum connection 52 on. The snail 49 extends to the snail elements 30 approach.

Wie 1 und 3 entnehmbar ist, kann die Rückhalte-Schneckenmaschine 45 seitlich und horizontal in eine Gehäuse-Bohrung 8 des Gehäuses 6 des Extruders 1 einmünden. Wie 2 und 4 entnehmbar ist, kann die Rückhalte-Schnecken-Maschine 45 auch vertikal von oben in das Gehäuse 6 einmünden und zwar im Bereich des oberen Zwickels 53 zwischen den beiden Gehäuse-Bohrungen 7, 8. Sie kann aber auch vertikal, aber seitlich gegenüber dem Zwickel 53 versetzt in eine Gehäuse-Bohrung 7 oder 8 einmünden. Die Rückhalte-Schnecke 49 wird derart angetrieben, dass sie eine Förderwirkung in Richtung zu den Gehäuse-Bohrungen 7, 8 ausübt, so dass trotz des angelegten Vakuums kein mit Mikro-Hohl-Kugeln 42 gemischter Kunststoff aus der Vakuum-Entgasungs-Zone 21 austritt.How 1 and 3 can be removed, the retention screw machine 45 laterally and horizontally in a housing bore 8th of the housing 6 of the extruder 1 open out. How 2 and 4 can be removed, the retention screw machine 45 also vertically from above into the housing 6 flow into the area of the upper gusset 53 between the two housing bores 7 . 8th , But it can also be vertical, but laterally opposite the gusset 53 placed in a housing bore 7 or 8th open out. The retention snail 49 is driven in such a way that it has a conveying action towards the housing bores 7 . 8th exercises, so that despite the applied vacuum none with micro-hollow balls 42 mixed plastic from the vacuum degassing zone 21 exit.

Der aufgeschmolzene und mit den Mikro-Hohl-Kugeln 42 durchmischte Kunststoff wird in einer Wärme weiterverarbeitet, d. h. eine Weiterverarbeitungsstation ist unmittelbar nachgeordnet, so dass für eine Weiterverarbeitung kein erneutes Aufschmelzen erforderlich ist, so dass eine Zerstörung der Mikro-Hohl-Kugeln 42 einerseits beim Granulieren und andererseits beim erneuten Aufschmelzen ausgeschlossen wird. Um eine solche Weiterverarbeitung in einer Wärme zu ermöglichen, ist der geschilderte Druckaufbau in der Druckaufbau-Zone 22 im Zusammenwirken mit der nachgeordneten Düse 31 von Vorteil. Sollte der an der Düse 31 erreichbare Druck nicht ausreichend sein, so kann es zweckmäßig sein, eine Zahnradpumpe 54 zum Druckaufbau hinter der Auftrags-Zone 23 anzuordnen, wie sie in 5 dargestellt ist. Eine solche Zahnrad-Pumpe 54 weist in üblicher Weise ein Pumpen-Gehäuse 55 auf, in dem zwei miteinander kämmende Zahnräder 56, 57 angeordnet sind. Um ein Zerquetschen oder Zerreiben der Mikro-Hohl-Kugeln 42 in der Zahnrad-Pumpe 54 zu vermeiden, werden beide Zahnräder 56, 57 absolut synchron und mechanisch zwangsgekoppelt angetrieben, und zwar über ein Verzweigungs-Getriebe 58, das von einem Pumpen-Motor 59 angetrieben wird. Jedes Zahnrad 56, 57 wird über eine eigene Antriebs-Welle 60, 61 angetrieben, so dass zwischen den Zahnrädern 56, 57 kein Dreh-Spiel entsteht, d.h. die Zähne 62 der Zahnräder 56, 57 liegen nicht aneinander. Derartige Antriebe werden auch als timing-gear bezeichnet. Die Zahnrad-Pumpe 54 wird quer zum Extruder 1 angeordnet, würde als in 1 nach rechts und oben angeschlossen. Bei einem Druckaufbau durch eine Zahnrad-Pumpe 54 würde die Düse 31 direkt hinter der Zahnrad-Pumpe 54 angeordnet. Weiterhin kann auch zum Druckaufbau ein einwelliger Extruder eingesetzt werden, wie es allgemein bekannt ist.The melted and with the micro-hollow balls 42 mixed plastic is further processed in a heat, ie a further processing station is immediately downstream, so that no further melting is necessary for further processing, so that the micro-hollow spheres are destroyed 42 on the one hand when granulating and on the other hand when re-melting is excluded. In order to enable such further processing in heat, the pressure build-up described is in the pressure build-up zone 22 in cooperation with the downstream nozzle 31 advantageous. Should that on the nozzle 31 achievable pressure may not be sufficient, so it may be appropriate to use a gear pump 54 to build up pressure behind the order zone 23 to arrange as in 5 is shown. Such a gear pump 54 has a pump housing in the usual way 55 on, in which two meshing gears 56 . 57 are arranged. To crush or grate the micro hollow balls 42 in the tooth rad pump 54 to avoid both gears 56 . 57 driven absolutely synchronously and mechanically positively coupled, via a branching gear 58 by a pump motor 59 is driven. Every gear 56 . 57 will have its own drive shaft 60 . 61 driven so that between the gears 56 . 57 there is no turning game, ie the teeth 62 of the gears 56 . 57 do not lie against each other. Such drives are also referred to as timing gear. The gear pump 54 becomes across the extruder 1 would be arranged as in 1 connected to the right and up. With a pressure build-up by a gear pump 54 would the nozzle 31 directly behind the gear pump 54 arranged. Furthermore, a single-shaft extruder can be used to build up pressure, as is generally known.

Als Kunststoffe kommen u.a. alle technischen Kunststoffe in Betracht, insbesondere Polyolefine, z. B. Polypropylene, Polyethylene und deren Mischungen, Copolymere hiervon, Polykondensate, z. B. Polyamide, Polyester, wie auch Hochtemperaturkunststoffe, z. B. PEEK (Polyetheretherketon), PPS (Polyphenylensulfide), LCP (flüssigkristalline Polymere). Die Mikro-Hohl-Kugeln 42 bestehen aus Glas oder Aluminiumsilikat. Für die Mikro-Hohl-Kugeln 42 gelten etwa folgende Daten:
Dichte der Mikro-Hohl-Kugeln: 0,2 bis 0,8 g/cm³
bevorzugt 0,3 bis 0,5 g/cm³
Schüttdichte der Mikro-Hohl-Kugeln: 0,05 bis 0,6 g/cm³
bevorzugt 0,1 bis 0,3 g/cm³
Durchmesser der Mikro-Hohl-Kugeln: 1 bis 300 µm
bevorzugt 1 bis 150 µmAll engineering plastics come into consideration as plastics, in particular polyolefins, e.g. B. polypropylenes, polyethylenes and mixtures thereof, copolymers thereof, polycondensates, for. B. polyamides, polyesters, as well as high-temperature plastics, for. B. PEEK (polyether ether ketone), PPS (polyphenylene sulfide), LCP (liquid crystalline polymers). The micro hollow balls 42 consist of glass or aluminum silicate. For the micro hollow balls 42 the following data apply:
Density of the micro hollow spheres: 0.2 to 0.8 g / cm³
preferably 0.3 to 0.5 g / cm³
Bulk density of the hollow micro spheres: 0.05 to 0.6 g / cm³
preferably 0.1 to 0.3 g / cm³
Diameter of the micro hollow balls: 1 to 300 µm
preferably 1 to 150 microns

Anstelle von Glas oder Aluminiumsilikat kommt als Material für die Mikro-Hohl-Kugeln auch ein entsprechend temperaturfester Kunststoff in Betracht.Instead of comes from glass or aluminum silicate as the material for the micro hollow spheres an appropriately temperature-resistant plastic can also be considered.

Claims (8)

Extruder zum Herstellen von syntaktischem Kunststoff durch Vermischen von Kunststoff und Mikro-Hohl-Kugeln – mit einem Gehäuse (6), – mit zwei in dem Gehäuse (6) ausgebildeten, einander durchdringenden Gehäuse-Bohrungen (7, 8), – mit zwei in den Gehäuse-Bohrungen (7, 8) angeordneten, gleichsinnig drehantreibbaren Schnecken-Wellen (11, 12), – mit einer Zuführ-Einrichtung (14) für Kunststoff, – mit einer der Zuführ-Einrichtung (14) in einer Förderrichtung (13) nachgeordneten Aufschmelz-Zone (16) mit einer Heizung und/oder Misch- und Knetelementen (25), – mit mindestens einer in eine der Aufschmelz-Zone (16) nachgeordnete Füllstoff-Zuführ-Zone (18) einmündenden Beschickungs-Schneckenmaschine (32) zur Zuführung von Mikro-Hohl-Kugeln (42), – mit in einer Füllstoff-Einmisch-Zone (19) vorgesehenen Misch-Elementen (28), – mit einer in eine Entgasungs-Zone (21) einmündenden und in diese fördernd ausgebildeten Rückhalte-Schneckenmaschine (45) und – mit einer nachgeordneten Druckaufbau-Zone.Extruder for the production of syntactic plastic by mixing plastic and micro hollow balls - with a housing ( 6 ), - with two in the housing ( 6 ) trained, penetrating housing bores ( 7 . 8th ), - with two holes in the housing ( 7 . 8th ) arranged, co-rotating worm shafts ( 11 . 12 ), - with a feed device ( 14 ) for plastic, - with one of the feeding devices ( 14 ) in a conveying direction ( 13 ) downstream melting zone ( 16 ) with a heater and / or mixing and kneading elements ( 25 ), - with at least one in one of the melting zone ( 16 ) downstream filler feed zone ( 18 ) feeding screw machine ( 32 ) for feeding micro hollow balls ( 42 ), - with in a filler mixing zone ( 19 ) provided mixing elements ( 28 ), - with one in a degassing zone ( 21 ) and screw conveyor machine designed to promote this ( 45 ) and - with a downstream pressure build-up zone. Extruder nach Anspruch 1, dadurch gekennzeichnet, dass die Beschickungs-Schneckenmaschine (32) mit zwei Förder-Schnecken (36, 37) versehen ist.Extruder according to claim 1, characterized in that the feed screw machine ( 32 ) with two conveyor screws ( 36 . 37 ) is provided. Extruder nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Beschickungs-Schneckenmaschine (32) einen Füllstoff-Zuführ-Trichter (41) aufweist, der geteilt ausgebildet ist und ein Trichter-Abteil (43) zur Zugabe der Mikro-Hohl-Kugeln (42) und ein Trichter-Abteil (44) zur Entlüftung der Mikro-Hohl-Kugeln (42) aufweist.Extruder according to claim 1 or 2, characterized in that the feed screw machine ( 32 ) a filler feed hopper ( 41 ) which is divided and has a funnel compartment ( 43 ) for adding the micro hollow balls ( 42 ) and a funnel compartment ( 44 ) for venting the micro hollow balls ( 42 ) having. Extruder nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Rückhalte-Schneckenmaschine (45) einen Vakuum-Anschluss (52) aufweist.Extruder according to one of claims 1 to 3, characterized in that the retaining screw machine ( 45 ) a vacuum connection ( 52 ) having. Extruder nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Rückhalte-Schneckenmaschine (45) seitlich und radial zu einer Gehäuse-Bohrung (8) in das Gehäuse (6) einmündet.Extruder according to one of claims 1 to 4, characterized in that the retaining screw machine ( 45 ) laterally and radially to a housing bore ( 8th ) in the housing ( 6 ) flows into. Extruder nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Rückhalte-Schneckenmaschine (45) in einen Zwickel (53) zwischen den beiden Gehäuse-Bohrungen (7, 8) in letztere einmündet.Extruder according to one of claims 1 to 4, characterized in that the retaining screw machine ( 45 ) in a gusset ( 53 ) between the two housing bores ( 7 . 8th ) flows into the latter. Extruder nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Druckaufbau-Zone als Zahnrad-Pumpe (54) ausgebildet ist.Extruder according to one of claims 1 to 6, characterized in that the pressure build-up zone as a gear pump ( 54 ) is trained. Extruder nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass eine Einrichtung zur Weiterverarbeitung in einer Wärme vorgesehen ist.Extruder according to one of claims 1 to 7, characterized in that that a device is provided for further processing in heat is.
DE20320505U 2003-09-17 2003-09-17 Extruder for blending plastic with hollow micro-spheres comprises a twin-screw extruder with twin-extruder side feed followed by vacuum de-gassing section Expired - Lifetime DE20320505U1 (en)

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DE10342822.4A DE10342822B4 (en) 2003-09-17 2003-09-17 Extruder for producing syntactic plastic

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1719600A2 (en) 2005-05-04 2006-11-08 Coperion Werner & Pfleiderer GmbH & Co. KG Plant for making foam plastic film
DE102005043867A1 (en) * 2005-09-12 2007-03-15 Reimelt Henschel Mischsysteme Gmbh Device on an extruder for side feeding of fillers
DE102005043868A1 (en) * 2005-09-12 2007-03-15 Reimelt Henschel Mischsysteme Gmbh extruder frame
WO2010097169A1 (en) 2009-02-27 2010-09-02 Rehau Ag + Co Extruded section, especially for aircraft, and method for producing an extruded section
WO2014082804A1 (en) * 2012-11-27 2014-06-05 Titan Umreifungstechnik Gmbh & Co. Kg Plastic strap, use thereof, and method for producing such a plastic strap
EP2860013B1 (en) * 2013-10-11 2018-05-02 Blach Verwaltungs GmbH & Co. KG Sidefeeder with backward venting
US20200180202A1 (en) * 2017-07-04 2020-06-11 Bostik Sa Production of an adhesive composition in an extruder
WO2021018845A1 (en) 2019-07-29 2021-02-04 Lanxess Deutschland Gmbh Polybutylene terephthalate with low thf content
WO2021018848A1 (en) 2019-07-29 2021-02-04 Lanxess Deutschland Gmbh Polybutylene terephthalate with low thf content

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1719600A2 (en) 2005-05-04 2006-11-08 Coperion Werner & Pfleiderer GmbH & Co. KG Plant for making foam plastic film
EP1719600B1 (en) * 2005-05-04 2016-01-13 Coperion GmbH Method for making foam plastic film
DE102005043867A1 (en) * 2005-09-12 2007-03-15 Reimelt Henschel Mischsysteme Gmbh Device on an extruder for side feeding of fillers
DE102005043868A1 (en) * 2005-09-12 2007-03-15 Reimelt Henschel Mischsysteme Gmbh extruder frame
DE102005043868B4 (en) * 2005-09-12 2013-10-17 Zeppelin Reimelt Gmbh extruder frame
WO2010097169A1 (en) 2009-02-27 2010-09-02 Rehau Ag + Co Extruded section, especially for aircraft, and method for producing an extruded section
WO2014082804A1 (en) * 2012-11-27 2014-06-05 Titan Umreifungstechnik Gmbh & Co. Kg Plastic strap, use thereof, and method for producing such a plastic strap
EP2860013B1 (en) * 2013-10-11 2018-05-02 Blach Verwaltungs GmbH & Co. KG Sidefeeder with backward venting
US10035291B2 (en) 2013-10-11 2018-07-31 Blach Verwaltungs Gmbh & Co. Kg Side feeder with rearwards ventilation
US20200180202A1 (en) * 2017-07-04 2020-06-11 Bostik Sa Production of an adhesive composition in an extruder
WO2021018845A1 (en) 2019-07-29 2021-02-04 Lanxess Deutschland Gmbh Polybutylene terephthalate with low thf content
WO2021018848A1 (en) 2019-07-29 2021-02-04 Lanxess Deutschland Gmbh Polybutylene terephthalate with low thf content

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