DE2533195A1 - Thermosetting sections continuously extruded in one operation - in double screw extruder pref. with screws of unequal length - Google Patents

Thermosetting sections continuously extruded in one operation - in double screw extruder pref. with screws of unequal length

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Publication number
DE2533195A1
DE2533195A1 DE19752533195 DE2533195A DE2533195A1 DE 2533195 A1 DE2533195 A1 DE 2533195A1 DE 19752533195 DE19752533195 DE 19752533195 DE 2533195 A DE2533195 A DE 2533195A DE 2533195 A1 DE2533195 A1 DE 2533195A1
Authority
DE
Germany
Prior art keywords
screws
cylinder
zones
zone
feed
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.)
Granted
Application number
DE19752533195
Other languages
German (de)
Other versions
DE2533195C3 (en
DE2533195B2 (en
Inventor
Hideke Mizuguchi
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.)
Dai Nippon Toryo KK
Japan Steel Works Ltd
Original Assignee
Dai Nippon Toryo KK
Japan Steel Works Ltd
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 Dai Nippon Toryo KK, Japan Steel Works Ltd filed Critical Dai Nippon Toryo KK
Priority to DE2533195A priority Critical patent/DE2533195C3/en
Publication of DE2533195A1 publication Critical patent/DE2533195A1/en
Publication of DE2533195B2 publication Critical patent/DE2533195B2/en
Application granted granted Critical
Publication of DE2533195C3 publication Critical patent/DE2533195C3/en
Expired 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
    • B29B7/30—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
    • B29B7/482—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 provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
    • 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
    • B29B7/484—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 with two shafts provided with screws, e.g. one screw being shorter than the other
    • 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
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • 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
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • B29B7/489—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
    • B29B7/82—Heating or cooling
    • B29B7/826—Apparatus therefor
    • 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
    • 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
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of 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
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • 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
    • B29C48/395—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
    • 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
    • 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
    • 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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • 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
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • 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
    • B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
    • B29K2301/10—Thermosetting resins

Abstract

A continuously operating extruder for thermosetting resins comprises two revolving screws in a barrel. The screws intermesh and revolve in opposite directions and comprise, from the feed openings onwards, a feed zone a rotor zone and an ejection zone, all so designed that the raw materials can be introduced at the feed openings, conveyed forwards, mixed, kneaded and expelled under press all in one continuous operation. The front end of the barrel is open and is adapted for the attachment of an extrusion die. The barrel is surrounded by heating and cooling jackets to permit temp. control. The appts. is useful for the continuous extrusion of thermosetting materials to form prismatic sections. If achieves this in a single operation without premixing of the starting materials in a second stage.

Description

Kontinuierlicher Extruder für hitzehärtbare Harze Die Erfindung bezieht sich auf einen Extruder und insbesondere auf einen Extruder zum kontinuierlichen Extrudieren von hitzehärtbaren Harzen. Continuous extruder for thermosetting resins The invention relates on an extruder and in particular on a continuous extruder Extrusion of thermosetting resins.

Eine kontinuierliche Extrudierung von hitzehärtbaren Harzen wurde bisher noch nicht durchgeführt. Hitzehärtbare Harze wurden üb]icherweise wie folgt geformt. Als erstes wurden die Harze unter Zugabe von Füllstoffen, Weichmachern, Pigmenten, Verstärkungsstoffen usw. vorgeknetet, und eine sogenannte Vormischung erzeugt, die anschliessend separat durch ein Press- oder ein Spritzgussverfahren diskontinuierlich verformt wurde. Die Ausformung von hitzehärtbaren Harzen bzw. Duroplasten erfolgte damit üblicherweise in zwei Schritten. A continuous extrusion of thermosetting resins was made not yet carried out. Thermosetting resins have been commonly used as follows shaped. First, the resins were added with fillers, plasticizers, Pigments, reinforcing materials, etc. pre-kneaded, and a so-called Premix is generated, which is then produced separately by a compression molding or an injection molding process was deformed discontinuously. The molding of thermosetting resins or Thermosetting plastics usually took place in two steps.

Mit der Entwicklung von Erzeugnissen mit neuen Formen und deren Verbreitung, wie z.B. profilförmige oder stangenförmige Produkte usw., entstand das Bedürfnis, eine Vorrichtung zu schaffen, mit der ein kontinuierliches Kneten von hitzehärtbaren Harzen mit Zusätzen möglich ist und ein anschliessendes Extrudieren in bestimmte Formen, ohne dass vorher Vormischungen hergestellt werden müssen.With the development of products with new shapes and their diffusion, such as profile-shaped or rod-shaped products etc., the need arose to to provide a device with which a continuous kneading of thermosetting Resins with additives is possible and a subsequent extrusion into certain Shapes without pre-mixing.

Es ist die Aufgabe der Erfindung, einen kontinuierlichen Extruder für hitzehärtbare Harze zu schaffen, wodurch die Herstellung von Vormischungen entfällt, so dass die hitzehärtbaren Harze zusammen mit Zusätzen, wie Füllstoffen, Weichmachern, usw., direkt eingegeben werden können, ausreichend geknetet und durch eine Ausstossöffnung kontinuierlich extrudiert werden.It is the object of the invention to provide a continuous extruder for thermosetting resins, eliminating the need to make premixes, so that the thermosetting resins together with additives such as fillers, plasticizers, etc., can be inputted directly, sufficiently kneaded and passed through a discharge port continuously extruded.

Eine weitere Aufgabe der Erfindung besteht darin, einen kontinuierlichen Extruder für hitzehärtbare Harze zu schaffen, der direkt mit Rohmaterialien, wie hitzehärtbaren Harzen, Füllstoffen, Weichmachern, etc., beschickt werden kann, und der diese Stoffe für eine kontinuierliche Extrudierung durch eine Ausstossöffnung vollständig durchknetet, so dass bei Anbringung einer geeigneten Strangpressform an der Ausstossöffnung das extrudierte Produkt in der gewünschten Form kontinuierlich erhalten wird.Another object of the invention is to provide a continuous To create extruder for thermosetting resins directly with raw materials such as thermosetting resins, fillers, plasticizers, etc., can be charged, and of these substances for continuous extrusion through an exhaust port completely kneaded, so that when a suitable extrusion mold is attached the extruded product in the desired shape continuously at the discharge opening is obtained.

Erfindungsgemäss besteht der kontinuierliche Extruder für hitzehärtbare Harze aus zwei Schnecken, die sich gegeneinander drehen und in einem Zylinder angeordnet sind. Jede dieser Schnecken ist in Längsrichtung in eine Beschickungszone, eine Rotorzone und eine Ausstosszone geteilt. Jede dieser Zonen hat eine äussere Gestaltung, die am besten zur Vorwärtsförderung der Rohmaterialien bzw. zur ausreichenden Knetung bzw. zur Extrudierung unter Druck geeignet ist, wenn sich beide Schnecken zusammenwirkend drehen. Der Zylinder ist an seinem rückwärtigen Bereich mit einer oder mehreren Öffnungen zur Beschickung mit Rohmaterial versehen und hat an seinem vorderen Ende eine Öffnung, welche die Befestigung einer Strangpressform ermöglicht. Der Zylinder ist weiterhin mit Doppelmänteln zur Temperatursteuerung umgeben.According to the invention, the continuous extruder for thermosetting Resins made of two screws that rotate against each other and arranged in a cylinder are. Each of these screws is longitudinally in a loading zone, one Rotor zone and an ejection zone divided. Each of these zones has an external design, the best for forwarding the raw materials or for adequate kneading or is suitable for extrusion under pressure when both screws interact turn. The cylinder is at its rear with one or more Provided openings for loading with raw material and has at its front end an opening that allows an extrusion mold to be attached. The cylinder is still surrounded by double jackets for temperature control.

Nachfolgend ist eine Ausffihrungsform der Erfindung anhand der beigefügten Zeichnungen beispielsweise beschrieben.The following is an embodiment of the invention with reference to the attached Drawings described for example.

Darin zeigen: Figur 1 die Draufsicht auf einen Querschnitt durch den Extruder, Figur 2 den Querschnitt einer Seitenansicht des Extruders nach Figur 1,und Figur 3 einen Querschnitt durch den Extruder entlang der Linie 111-111 nach Figur 2.These show: FIG. 1 the top view of a cross section through the Extruder, Figure 2 shows the cross-section of a side view of the extruder according to Figure 1, and FIG. 3 shows a cross section through the extruder along the line 111-111 according to FIG 2.

Der kontinuierliche Extruder für hitzehärtbare Harze nach der Erfindung besteht im Prinzip aus zwei Schnecken und einem oder mehreren Zylindern.The continuous extruder for thermosetting resins according to the invention consists in principle of two screws and one or more cylinders.

Wie in den Figuren gezeigt, sind die Schnecken 1 und 2 so ausgebildet, dass sie mit entgegengesetztem Drehsinn innerhalb der Zylinder rotieren, wobei sie durch beliebige Antriebsmittel (nicht gezeicht) ueber die mit Nuten 3 versehenen Wellenenden angetrieben werden. In diesem Zusammenhang wird darauf hingewiesen, dass in den Zeichnungen eine der Schnecken, z.B. die Schnecke 1, eine grössere axiale Länge als die andere, z.B. Schnecke 2, aufweist, so dass die erstere in ihrem vorderen Ausstossbereich wie in einer Einzelschneckenpresse ausgebildet ist, beide Schnecken 1 und 2 können jedoch auch gleiche axiale Langen aufweisen.As shown in the figures, the screws 1 and 2 are designed so that that they rotate in opposite directions within the cylinder, whereby they by any drive means (not shown) via the grooves 3 Shaft ends are driven. In this context it is pointed out that that in the drawings one of the screws, e.g. screw 1, has a larger axial one Length than the other, e.g. screw 2, so that the former in its front The discharge area is designed as in a single screw press, both screws However, 1 and 2 can also have the same axial lengths.

Beide Schnecken 1 und 2 sind in axialer Richtung von ihrem hinteren, mit Nuten versehenen Ende zu ihrem vorderen Ausstossende gemäss ihrer Funktion und ihrer Form in verschiedene Zonen aufgeteilt. Diese Zonen sind der Reihe nach eine Einzugszone 4 oder 4a, in welcher die Rohstoffe vorwärts gefördert werden, eine Rotorzone bzw. Umwandlungszone 5 oder 5a, in welcher die Rohstoffe ausführlich geknetet werden und eine Ausstosszone 6 oder 6a, in welcher die gekneteten Rohstoffe unter Druck durch eine Ausstossöffnung des Zylinders kontinuierlich ausgestossen werden.Both screws 1 and 2 are in the axial direction from their rear, grooved end to their front ejection end according to their function and their shape divided into different zones. These zones are one in turn Feed zone 4 or 4a, in which the raw materials are conveyed forward, one Rotor zone or conversion zone 5 or 5a, in which the raw materials are kneaded extensively and a discharge zone 6 or 6a, in which the kneaded raw materials under Pressure can be continuously ejected through an exhaust port of the cylinder.

Die Einzugszone 4 oder 4a wird von einer üblichen Förderschnecke gebildet, deren Abstand der Gewindegänge in achsparalleler Richtung für eine Drehung geeignet ist, wobei das Material in der gleichen Weise vorwärts gefördert wird, wie dies von Extrudern für synthetische Harze bekannt ist. Die beiden Einzugszonen 4 und 4a haben eine entgegengesetzte Steigung. Die Gewindegänge der Schnecken 1 und 2 stehen in den Einzugszonen 4, 4a miteinander im Eingriff. Die Rotor- bzw. Umwandlungszonen r :rn a werden von einer Reihe von Rotorbereichen mit jeweils der Länge B gebildet (siehe Figur 2). Die Ausbildung der Querschnitte dieser Bereiche entspricht im allgemeinen derjenigen der Rotorflügel des bekannten diskontinuierlich betriebenen Banbury Mischers, der in Figur 3 gezeigt ist, wobei nach entgegengesetzten Seiten ragande Flüge l jedes Bereicnes innerhalb der Länge B oder an beiden Eendsn in einem Winkel von 90° einander entgegengesetzt verdreht sind wie dIes in den Figuren ^ und 2 gezeigt ist Die Anzahl der Rotorbereiche und die Richtungen der Steigung kann nach Wunsch ausgewählt werden. Die Steigungwinkel zwischen aufeinander folgenden Rotorbereichen können ebenfalls verändert oder sogar umgekehrt werden, um einen optimalen Wirkungsgrad für den Knetvorgang zu erhalten, abhängig von der Art des zu knetenden Materials.The feed zone 4 or 4a is formed by a conventional screw conveyor, whose distance between the threads in the axis-parallel direction is suitable for rotation with the material being fed forward in the same manner as this synthetic resin extruders. The two feed zones 4 and 4a have an opposite slope. The threads of worms 1 and 2 are in engagement with one another in the feed zones 4, 4a. The rotor or conversion zones r: rn a are made up of a number of rotor areas, each with of length B (see Figure 2). The formation of the cross-sections of these areas generally corresponds to that of the rotor blades of the known discontinuous operated Banbury mixer shown in Figure 3, with opposite Side ragande flights l of each area within length B or at both ends are rotated in opposite directions to one another at an angle of 90 °, as in the figures ^ and 2 shown is the number of rotor areas and the directions of the pitch can be selected as desired. The slope angles between consecutive Rotor areas can also be changed or even reversed to get one to obtain optimal efficiency for the kneading process, depending on the type of material to be kneaded.

Die Ausstosszone 6 oder 6a weist eine bekannte Fördersechecke auf, deren Gewindegänge in achsparalleler Richtung einen solchen Abstand haben, der ihrem Drehung entspricht und die die gekneteten Stoffe unter Druck zu der Ausstossöffnung des Zylinders transportiert. Die Ausstosszone 6 oder 6a ist in ihrer Ausbildung ähnlich der Einzugszone 4 oder 4a, jedoch ist der Abstand der Gewindegänge in achsparalleler Richtung kleiner und wenigstens einer seiner teile hat eine wesentlich gr-ssere axiale Länge als die Einzugszone oder 4a.The discharge zone 6 or 6a has a known conveyor screw, whose threads in the axially parallel direction have such a distance that their Corresponds to rotation and which the kneaded materials under pressure to the discharge port of the cylinder. The discharge zone 6 or 6a is in its formation similar to the feed zone 4 or 4a, but the distance between the threads is parallel to the axis Towards smaller and at least one of its parts has a significantly larger one axial length than the feed zone or 4a.

er Ziliner, in dem sich die drehbaren Schnecken -, und 2 befinden besteht aus zwei Teilen dn. einem hinteren Zilinder 7 und einem vorderen Zylinder 8, wobei der hintere Zylinder 7 berie Schnecken 1 und 2 enthält, und der vordere Zylinder 8 nur die Schnecke .he Ziliner, in which the rotating screws -, and 2 are located consists of two parts dn. a rear cylinder 7 and a front cylinder 8, the rear cylinder 7 including screws 1 and 2, and the front one Cylinder 8 only the screw.

In der oberen Wand des hinteren Zylinders 7 nahe den mit Nuten verwehenen Wellenenden der Schnecken in einem Bereich, welcher der Einzugszone 4 und 4a der Schnecken 1 und 2 entspricht, sind Eingabeöffnungen 9, 10 und 11 für das Rohmaterial eng aneinanderliegend zwischen den Mittellinien der beiden Schnecken 1 und 2 in axialer Richtung der Zylinder 7 und 8 angeordnet. Bei der gezeigten Ausführungsform sind drei Rohmaterialeinspeiseöffnungen 9, 10 und 11 für hitzehärtbares Harz bzw.In the upper wall of the rear cylinder 7 near the blown with grooves Shaft ends of the screws in an area which is the feed zone 4 and 4a of the Corresponding to augers 1 and 2, input ports 9, 10 and 11 are for the raw material closely spaced between the center lines of the two augers 1 and 2 in arranged in the axial direction of the cylinders 7 and 8. In the embodiment shown are three raw material feed ports 9, 10 and 11 for thermosetting resin and

Füllstoffe bzw. Verstärkungsmaterialien vorgesehen.Fillers or reinforcing materials are provided.

Die Anzahl der Öffnungen zur Einspeisung der Rohstoffe kann jedoch, abhängig von den jeweils zu behandelnden Materialien geändert werden.However, the number of openings for feeding in the raw materials can can be changed depending on the particular materials to be treated.

Der vordere Zylinder 8 ist an seinem Ende offen, wodurch eine Ausstoseöffnung gebildet wird, welche so ausgebildet ist, dass eine Strangpressform lösbar daran befestigt werden kann, um das geknetete Material direkt im Anschluss an seinen Ausstoss aus dem Extruder durch die Ausstossöffnung zu formen.The front cylinder 8 is open at its end, creating an exhaust port is formed, which is designed so that an extrusion mold releasably thereon can be attached to the kneaded material directly following its ejection from the extruder through the discharge port.

Der hintere und vordere Zylinder 7 und 8 sind aussen jeweils mit Doppelmänteln 12 versehen, um die Temperatur des im Inneren befindlichen Materials zu steuern.The rear and front cylinders 7 and 8 are each provided with double jackets on the outside 12 to control the temperature of the material inside.

Der beschriebene Extruder arbeitet wie folgt.The extruder described operates as follows.

Die Rohstoffe, wie hitzehärtbares Harz, Füllstoffe, Weichmacher, Verstärkungsmaterialien, usw., werden in geeigneter Weise durch die Naterialbeschickungsöffnungen 9 10 wnd 11 in den hinteren Zylinder 7 eingespeist und durch die Arbeitsweise der Einzugszonen 4, 4a der Schnecken 1 und 2, die sich in dem hinteren Zylinder 7 einander entgegengesetzt drehen, nach vorne in die Rotorzone 5 und 5a der Schnecken 1 und 2 gefördert. Dort werden die Rohstoffe völlig durchgeknetet, um dann weiter in die Ausstosszonen 6, 6a der Schnecken t und 2 gefördert zu werden. Anschliessend werden die gekneteten Stoffe kontinuierlich unter Druck durch die Ausstossöffnung des Extruders extrudiert. Gegebenenfalls können aie Materialien in Produkte geformt werden, wenn sie durch eine geeignete Strangpressform extrudiert werden die der Ausstossöffnung des Zylinders 8 befestigt ist.The raw materials, such as thermosetting resin, fillers, plasticizers, reinforcing materials, etc., are suitably fed through the material feed openings 9 10 wnd 11 fed into the rear cylinder 7 and by the operation of the feed zones 4, 4a of the snails 1 and 2, which are located in the rear cylinder 7 rotate in opposite directions, forward into the rotor zone 5 and 5a of the screws 1 and 2 funded. There the raw materials are fully kneaded and then continued to be conveyed into the discharge zones 6, 6a of the screws t and 2. Afterward the kneaded materials are continuously pressurized through the discharge port of the extruder. Optionally, all materials can be molded into products when extruded through a suitable extrusion die are those of the The discharge opening of the cylinder 8 is attached.

Vorzugsweise werden die Rohstoffe in den Rotorzonen 5, 5a durch die Rotorflügel vom Ranbur-nirp der entsprechenden Rotorbereiche kraftvoll durchgeknetet. Die Knetwirkung kann vervielfacht werden, wenn der Winkel der Steigung der Flügel verändert oder zwischen bestimmten Rotorbereichen umgekehrt wird.Preferably, the raw materials are in the rotor zones 5, 5a by the Rotor blades from the Ranbur-nirp of the corresponding rotor areas are powerfully kneaded. The kneading effect can be multiplied if the angle of the slope of the blades is changed or reversed between certain rotor areas.

Obwohl eine bevorzugte Ausführungsform der Erfindung beschrieben und gezeigt wurde, sollen auch Modifikationen und Anderungen möglich sein, ohne den Bereich der Erfindung zu verlassen.Although a preferred embodiment of the invention is described and has been shown, modifications and changes should also be possible without the To leave the scope of the invention.

Claims (5)

Patentansprüche Claims Kontinuierlicher Extruder für hitzehärtbare Harze, dadurch g e k e n n z e i c h n e t, dass er zwei Schecken (1, 2) und einen Zylinder (7, 8) aufweist, in welchem die Schnecken drehbar gelagert sind und die Schnecken (1, 2) mit entgegengesetztem Drehsinn angetrieben werden und in Längsrichtung ausgehend vom Hinterende eine Einzugszone (4, 4a), eine Rotorzone (5, 5a) und eine Ausstosszone (6, Ga) aufweisen und jede dieser Zonen so ausgebildet ist, dass sie auf geeignete Weise die Rohstoffe vorwärts fördern kann bzw. ausreichend kneten kann bzw. sie unter Druck ausstossen kann, wenn die miteinander zusammenwirkenden Schnecken (1, 2) sich drehen und dass der Zylinder (7, 8) mit einer oder mehreren Öffnungen (9, 10, 11) zur Beschickung mit Rohmaterial versehen ist, und die Öffnungen in der Einzugszone (4, 4a) der zu Schnecken angeordnet sind und dass das vordere Ende der Zylinder (7, 8) offen ist, um ein Strangpresswerkzeug zu befestigen und dass der Zylinder (7, 8) von Doppelmänteln (12) umgeben ist. um die Temperatur der Rohstoffe zu steuern.Continuous extruder for thermosetting resins, thereby g e k e n n n z e i n e t that it has two screws (1, 2) and a cylinder (7, 8), in which the screws are rotatably mounted and the screws (1, 2) with opposite Direction of rotation are driven and a feed zone in the longitudinal direction starting from the rear end (4, 4a), a rotor zone (5, 5a) and an exhaust zone (6, Ga) and each These zones are designed in such a way that they can move the raw materials forward in a suitable manner can convey or knead sufficiently or can expel it under pressure, when the co-operating screws (1, 2) rotate and that the Cylinder (7, 8) with one or more openings (9, 10, 11) for loading with Raw material is provided, and the openings in the feed zone (4, 4a) of the screw are arranged and that the front end of the cylinder (7, 8) is open to a Attach the extrusion tool and that the cylinder (7, 8) of double jackets (12) is surrounded. to control the temperature of the raw materials. 2. Kontinuierlicher Extruder nach Anspruch 11 dadurch g e k e n n z e i c h n e t, dass die Einzug zonen (4, 4a) der Schnecken (1 2) durch Förderschnecken mit einem geeigneten achsparallelen Abstand der Gewindegänge gebildet werden und dass die Steigung der Schnecken in den beiden Einzugsbereichen (4, 4a) einander entgegengesetzt gerichtet ist.2. Continuous extruder according to claim 11, thereby g e k e n n notices that the feed zones (4, 4a) of the screws (1 2) are provided by screw conveyors be formed with a suitable axially parallel spacing of the threads and that the pitch of the screws in the two intake areas (4, 4a) is mutually exclusive is directed in the opposite direction. 3. Kontinuierlicher Extruder nach Anspruch 1 oder 2, dadurch g e k e n n z e i c h n e t, dass die Rotorzonen (5, 5a) der Schnecken (1,2) aus einer Reihe von Rotorbereichen gebildet werden, deren Querschnitt demjenigen der Rotorflügel eines bekannten di skontinuierlich betriebenen Banbury-Mischers entspricht, wobei einander entgegengesetzt gerichtete Flügel eines Bereiches in einem gegebenen Winkel zwischen beiden Enden gegeneinander verdreht sind.3. Continuous extruder according to claim 1 or 2, characterized g e k It is noted that the rotor zones (5, 5a) of the screws (1,2) consist of a Series of rotor areas are formed, the cross section of which corresponds to that of the rotor blades corresponds to a known di continuously operated Banbury mixer, wherein oppositely directed wings of an area at a given angle are twisted against each other between the two ends. 4. Kontinuierlicher Extruder nach einem oder mehreren der Ansprüche 1 bis 3, dadurch g e k e n n -z e i c h n e t, dass die Ausstosszonen (5, 5a) der Schnecken (1, 2j von Förderschnecken mit geeignetem achsparallelen Abstand zwischen den Gewindegängen gebildet werden, wobei dieser Abstand jedoch kleiner ist als derjenige der Einzugszonen (4, 4a) und dass die Steigung der Schnecken (1, 2) zwischen beiden Ausstosszonen (6, C,a) umgekehrt ist und dass wenigstens eine der Ausstosszonen axial eine grössere Länge als die Einzugszonen aufweist.4. Continuous extruder according to one or more of the claims 1 to 3, characterized in that the discharge zones (5, 5a) of the Screws (1, 2j of screw conveyors with a suitable axially parallel distance between the threads are formed, but this distance is smaller than that the feed zones (4, 4a) and that the pitch of the screws (1, 2) between the two Ejection zones (6, C, a) is reversed and that at least one of the discharge zones axially has a greater length than the feed zones. 5. Kontinuierlicher Extruder nach einem oder mehreren der Ansprüche 1 bis 4, dadurch g e k e n n -z e i c h n e t, dass die axialen Längen der Schnekken (1 2) unterschiedlich sind und dass der Zylinder axial in einen hinteren und einen vorderen Zylinder geteilt ist welche durch gegeneinanderliegende Flansche fest miteinander verbunden sind und dass der hintere Zylinder (7) beide Schnecken (1. 2) enthält, während der vordere Zylinder (8) nur die längere Schnecke (1) enthält.5. Continuous extruder according to one or more of the claims 1 to 4, which means that the axial lengths of the screws (1 2) are different and that the cylinder is axially divided into a rear and a front cylinder is divided which is fixed to each other by opposing flanges are connected and that the rear cylinder (7) contains both screws (1. 2), while the front cylinder (8) contains only the longer screw (1). L e e r s e i t eL e r s e i t e
DE2533195A 1975-07-24 1975-07-24 Continuous twin screw extruder Expired DE2533195C3 (en)

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DE2533195B2 DE2533195B2 (en) 1979-03-29
DE2533195C3 DE2533195C3 (en) 1980-08-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309410A2 (en) * 1987-09-25 1989-03-29 Ciba-Geigy Ag Process for the manufacture of a heat-curable, meltable mixture, installation for carrying it out and suitable extruder inlet chamber for use in the latter
US5302106A (en) * 1991-07-11 1994-04-12 Friedrich Theysohn Gmbh Double-worm extruder with polygonal-disk kneader
CN106743213A (en) * 2017-04-01 2017-05-31 南京锎巴新材料科技有限公司 A kind of twin-screw for being stirred for highly viscous slurry grinding distribution and being conveyed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309410A2 (en) * 1987-09-25 1989-03-29 Ciba-Geigy Ag Process for the manufacture of a heat-curable, meltable mixture, installation for carrying it out and suitable extruder inlet chamber for use in the latter
EP0309410A3 (en) * 1987-09-25 1990-09-05 Ciba-Geigy Ag Process for the manufacture of a heat-curable, meltable mixture, installation for carrying it out and suitable extruder inlet chamber for use in the latter
US5302106A (en) * 1991-07-11 1994-04-12 Friedrich Theysohn Gmbh Double-worm extruder with polygonal-disk kneader
CN106743213A (en) * 2017-04-01 2017-05-31 南京锎巴新材料科技有限公司 A kind of twin-screw for being stirred for highly viscous slurry grinding distribution and being conveyed

Also Published As

Publication number Publication date
DE2533195C3 (en) 1980-08-07
DE2533195B2 (en) 1979-03-29

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