[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

DE884105C - Injection molding process and device for the production of all kinds of molded parts from thermoplastic materials - Google Patents

Injection molding process and device for the production of all kinds of molded parts from thermoplastic materials

Info

Publication number
DE884105C
DE884105C DED6019D DED0006019D DE884105C DE 884105 C DE884105 C DE 884105C DE D6019 D DED6019 D DE D6019D DE D0006019 D DED0006019 D DE D0006019D DE 884105 C DE884105 C DE 884105C
Authority
DE
Germany
Prior art keywords
screws
injection molding
molding process
production
kinds
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.)
Expired
Application number
DED6019D
Other languages
German (de)
Inventor
Richard Dr Roehm
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Priority to DED6019D priority Critical patent/DE884105C/en
Application granted granted Critical
Publication of DE884105C publication Critical patent/DE884105C/en
Expired legal-status Critical Current

Links

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
    • 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
    • B29C45/58—Details
    • B29C45/60—Screws
    • 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
    • B29C45/20—Injection nozzles
    • B29C45/23—Feed stopping equipment
    • 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
    • B29C48/25—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
    • 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
    • B29C48/72—Feedback means, i.e. part of the molten material being fed back into upstream stages of the extruder
    • B29C48/725—Feedback means, i.e. part of the molten material being fed back into upstream stages of the extruder for plasticising or homogenising devices
    • 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
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • 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
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

Spritzgußverfahren und Vorrichtung zur Herstellung von Formstücken aller Art aus thermoplastischen Werkstoffen Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Formstücken aller Art aus thermoplastischenWerkstoffen, insbesondere thermoplastischen Kunststoffen, wie z. B. Polymerisate oder Mischpolymerisate der Vinylhalogenide und Polykondensationsprodukte, das sind hochmolekulare Stoffe mit in der Molekülkette periodisch wiederkehrenden C O-N H-Gruppen.Injection molding process and device for the production of molded pieces of all kinds made of thermoplastic materials The invention relates to a method for the production of all kinds of molded parts from thermoplastic materials, in particular thermoplastics, such as. B. polymers or copolymers of the Vinyl halides and polycondensation products, these are high molecular weight substances with Periodically recurring C O-N H groups in the molecular chain.

Es ist bekannt, derartige Formstücke nach dem Spritzgußverfahren herzustellen. Hierbei bedient man sich im wesentlichen solcher Maschinen, bei denen der Werkstoff in einem Zylinder erwärmt und mittels eines Kolbens durch eine Düse in die Spritzform getrieben wird. Diese Art der Verarbeitung ist jedoch mit Vorteil nur dann vorzunehmen, wenn es sich um Werkstoffe handelt, die bei kurzzeitiger Erwärmung einen guten und glatten Fluß zeigen. Man stößt bei Anwendung dieses Verfahrens auf Schwierigkeiten, wenn Werkstoffe vorliegen, die in erweichtem Zustand sehr zäh sind und bei denen die Verarbeitungstemperatur sehr nahe beim Zersetzungspunkt liegt. It is known to injection mold such shaped pieces to manufacture. In doing so, such machines are essentially used where the material is heated in a cylinder and through a nozzle by means of a piston is driven into the injection mold. However, this type of processing is advantageous only to be carried out if it is a matter of materials that are subject to brief heating show a good and smooth flow. One encounters using this procedure Difficulties when materials are present that are very tough when softened and at which the processing temperature is very close to the decomposition point.

Wenn es auch gelingen mag, solche Werkstoffe auf den bekannten vorbeschriebenen Spritzgußmaschinen zu verarbeiten, indem man durch besondere Ausbildung des Spritzzylinders und des Spritzkolbens bzw. durch Anordnung besonderer Heizaggregate für eine möglichst gleichmäßige Wärmezuführung Sorge trägt, so besteht bei diesem Verfahren immer die Gefahr, daß Reste des Werk- stoffes zurüdibleiben, die sich tei zusätzlicher Erwärmung zersetzen und die nachfolgenden Spritzlinge verderben.Even if it may succeed, such materials on the known above-described Injection molding machines can be processed by special training of the injection cylinder and the injection piston or by arranging special heating units for a possible ensures uniform heat supply, with this method there is always the Danger that remains of the work matter that divides additional heating decompose and spoil the subsequent molded parts.

Man hat daher schon versucht, die Spritzgußmaschinen so abzuändern, daß der Werkstoff durch umlaufende Preßschrauben bzw. Schnecken zur -Spritzdüse befördert wird, um auf diese Weise eine bessere, gleichmäßigere Plastifizierung zu erreichen. Erfolge waren aber derartigen Konstruktionen nicht beschieden, weil man noch nicht erkannt hatte, daß bei der Ausbildung der Schnecken die Eigenheiten des Werkstoffes in Rechnung zu stellen sind und die Schnecken mehr oder weniger nach überfieferter Methode als normale Transportschnecken konstruiert wurden. Das Problem, auch solche empfindlichen, thermoplastischen Werkstoffe nach dem Spritzgußverfahren zu einwandfreien Formstücken zu verarbeiten, blieb daher nach wie vor ungelöst. Das geht allein schon daraus hervor, daß die zur Zeit auf dem Markt befindlichen Spritzgußmaschinen ausnahmslos solche sind, bei welchen mit Zylinder und Kolben gearbeitet wird. Attempts have therefore already been made to modify the injection molding machines in such a way that that the material is transported to the spray nozzle by rotating press screws or screws is promoted in order to achieve a better, more uniform plasticization in this way to reach. However, such constructions were not successful because one had not yet recognized that the peculiarities of the formation of the snails of the material are to be charged and the screws more or less were constructed as normal screw conveyors according to the over-supplied method. That Problem, even such sensitive, thermoplastic materials after the injection molding process Processing it into flawless fittings remained unsolved. This is evident from the fact that those currently on the market Injection molding machines are invariably those with cylinders and pistons is being worked on.

Es hat sich nun überraschenderweise herausgestellt, daß Werkstoffe mit schlechtem Fließvermögen, die zu ihrer Verarbeitung einer Aufheizung bis in die Nähe ihres Zersetzungspunktes bedürfen, nach dem Spritzgußverfahren verarbeitet werden können, wenn zur Plastifizierung und zur Förderung des Werkstoffes bis zur Spritzdüse zwei oder mehrere mit ihren Flanken ineinandergreifende Schnecken Anwendung finden, die sich in einem geheizten Gehäuse in gleichem Drehsinn bewegen. It has now surprisingly been found that materials with poor flowability, which leads to heating up to in require the proximity of their decomposition point, processed by the injection molding process can be if for plasticization and for promoting the material up to Spray nozzle with two or more screws that interlock with their flanks that move in the same direction of rotation in a heated housing.

Hierbei kann in einer beispielsweisen Ausführungsform des Verfahrens die plastifizierte Werkstoffmasse der Düse unmittelbar zugeführt werden, so daß der zur Formung des Spritzlings erforderliche Druck von den Schnecken ausgeiibt wird. In an exemplary embodiment of the method the plasticized material mass of the nozzle are fed directly so that the pressure required to form the molding is exerted by the screws will.

In einer weiteren Ausbildung des erfindungsgemäßen Verfahrens dienen die Schnecken ausschließlich einer den Eigenheiten des Werkstoffes angepaßten Plastifizierung und treiben den Werkstoff in eine als Zylinder ausgebildete Kammer vor. Serve in a further embodiment of the method according to the invention the screws only have a plasticization adapted to the characteristics of the material and propel the material into a chamber designed as a cylinder.

Das eigentliche absatzweise Verspritzen fällt dabei einem hin und her gehenden Kolben zu, der beim Vorgehen die Eintrittsöffnung für den Werkstoff abschließt und beim Zurückfahren wieder freigibt.The actual intermittent splashing falls down and coming piston, which is the inlet opening for the material when proceeding closes and releases again when driving back.

Bei einer zweckmäßigen Vorrichtung zur Durchführung des Verfahrens besitzen die Schnecken von der Austrittsseite nach der Einfüllseite abnehmenden Durchmesser sowie absatzweise abnehmende Steigung. Dadurch wird erreicht, daß auf der Einfüliseite zwischen den Schneckengängen einerseits sowie zwischen Schneckengängen und Gehäuse andererseits ein größerer Raum zum Einfüllen der Massen zur Verfügung steht, die dann im weiteren Verlauf der Plastifizierung in dem enger werdenden Querschnitt verdichtet werden. In an expedient device for carrying out the method the screws have decreasing from the outlet side to the filling side Diameter and gradually decreasing pitch. This ensures that on the filling side between the screw flights on the one hand and between screw flights and housing, on the other hand, a larger space is available for filling in the masses which is then in the further course of the plasticization in the narrowing cross-section be condensed.

Die kontinuierliche Arbeitsweise kann bei diesem Verfahren in bekannter Weise dadurch gewährleistet werden, daß z. B. die Düse der Maschine beim Abheben der Form sich selbsttätig schließt und der iiberschüssige Werkstoff der Schnecke mittels einer Umlaufleitung, deren Ventil sich gleichzeitig betätigt, durch eine Öffnung dem Schneckengehäuse am Einfüllstutzen wieder zugeführt wird. Man kann aber ebensogut auch periodisch arbeiten, indem Einrichtungen vorgesehen werden, mit deren Hilfe die Schnecken nach jedem Schuß automatisch stillgesetzt und zum neuen Arbeitstakt wieder eingeschaltet werden. The continuous mode of operation can be known in this process Way to be ensured that z. B. the nozzle of the machine when taking off the shape closes automatically and the excess material of the screw by means of a circulation line, the valve of which is actuated at the same time, through a Opening is fed back to the screw housing at the filler neck. But you can also work periodically by providing facilities with their Help the snails automatically shut down after each shot and start a new work cycle be switched on again.

In der Zeichnung zeigt Fig. I eine periodisch arbeitende Doppelschnecke a, die in einem Gehäuse b läuft. Der bei c aufgegebene Stoff wird durch den Kanal d in die Spritzform S gedrückt. In the drawing, FIG. I shows a periodically operating twin screw a, which runs in a housing b. The substance given in at c is passed through the channel d pressed into the injection mold S.

In Fig. 2 drücken die Schnecken a über Kanal d in den Zylinder e mit dem Steuerkolben f in die Spritzform S. In Fig. 3 sind Schnecken mit absatzweise steigendem Durchmesser, in Fig. 4 solche mit absatzweise steigender Steigung dargestellt. Für eine kontinuierliche Arbeitsweise zeigt Fig. 5 einen zur Spritzform geöffneten Kanal d des Steuerorgans g und in Fig. usa einen für die Formentleerung zum Umleitkanal k geöffnete Stellung des Steuerorgans. In Fig. 6 ist eine Doppelschnecke dargestellt, in welcher das Gehäuse wie auch die Schnecken zonenweise heiz- und kühlbar eingerichtet sind.In FIG. 2, the screws a press along with the cylinder e via channel d the control piston f in the injection mold S. In Fig. 3 are screws with intermittent increasing diameter, in Fig. 4 those shown with incrementally increasing slope. For a continuous mode of operation, FIG. 5 shows one that is open to the injection mold Channel d of the control member g and, in FIG. Usa, one for emptying the mold to the diversion channel k open position of the control element. In Fig. 6 a double screw is shown, in which the housing and the screws can be heated and cooled in zones are.

Claims (4)

PATENTANSPRÜcHE: I. Spritzgußverfahren zum Herstellen von Formstücken aller Art aus thermoplastischen Werkstoffen, dadurch gekennzeichnet, daß die Plastifizierung der noch nicht vorbearbeiteten, gegebenenfalls vorgemischten pulver- oder kornförmigen Rohstoffe und ihre Förderung zur Spritzdüse mittels zweier oder mehrerer mit ihren Flanken ineinandergreifenden Schnecken erfolgt, die sich in einem geheizten Gehäuse im gleichen Drehsinn bewegen. PATENT CLAIMS: I. Injection molding process for the production of molded pieces of all kinds made of thermoplastic materials, characterized in that the plasticization the not yet preprocessed, possibly premixed powdery or granular Raw materials and their conveyance to the spray nozzle by means of two or more with their Flanks interlocking screws are made, which are located in a heated housing move in the same direction of rotation. 2. Verfahren nach Anspruch I, dadurch gekennzeichnet, daß nur die Plastifizierung des Werkstoffes durch die Schnecken vorgenommen wird, während das Verspritzen durch einen vorgeschalteten Zylinder mit Kolben in an sich bekannter Weise erfolgt. 2. The method according to claim I, characterized in that only the Plasticization of the material is carried out by the screws while the Spraying through an upstream cylinder with piston in a known manner Way done. 3. Vorrichtung zur Durchführung des Verfahrens nach Anspruch I und 2, dadurch gekennzeichnet, daß die Schnecken absatzweise abnehmenden Durchmesser besitzen. 3. Apparatus for performing the method according to claim I and 2, characterized in that the screws intermittently decreasing diameter own. 4. Vorrichtung zur Durchführung des Verfahrens nach Anspruch I bis 3, dadurch gekennzeichnet, daß die Schnecken absatzweise abnehmende Steigung besitzen. 4. Apparatus for performing the method according to claim I to 3, characterized in that the screws have intermittently decreasing pitch. Angezogene Druckschriften: Deutsche Patentschriften Nr. 652 ggo, 682 787; schweizerische Patentschriften Nr. 198 647, 220 550; britische Patentschrift Nr. 386 vom Jahre 1913. Attached publications: German patent specifications No. 652 ggo, 682 787; Swiss patents No. 198 647, 220 550; British patent specification No. 386 from 1913.
DED6019D 1943-05-30 1943-05-30 Injection molding process and device for the production of all kinds of molded parts from thermoplastic materials Expired DE884105C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED6019D DE884105C (en) 1943-05-30 1943-05-30 Injection molding process and device for the production of all kinds of molded parts from thermoplastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED6019D DE884105C (en) 1943-05-30 1943-05-30 Injection molding process and device for the production of all kinds of molded parts from thermoplastic materials

Publications (1)

Publication Number Publication Date
DE884105C true DE884105C (en) 1953-08-03

Family

ID=7031669

Family Applications (1)

Application Number Title Priority Date Filing Date
DED6019D Expired DE884105C (en) 1943-05-30 1943-05-30 Injection molding process and device for the production of all kinds of molded parts from thermoplastic materials

Country Status (1)

Country Link
DE (1) DE884105C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068460B (en) * 1959-11-05 R. H. Windsor Limited, South Chessington, 'Surbiton, Surrey (Großbritannien) Injection molding machine for processing thermoplastics
DE974124C (en) * 1950-03-08 1960-09-22 Carlo Pasquetti Screw press for processing thermoplastic materials
DE1155232B (en) * 1960-12-06 1963-10-03 Gerhard Kestermann Zahnraeder Screw extrusion press for processing thermoplastics
DE1168063B (en) * 1955-10-26 1964-04-16 Siemens Ag Screw press for preparing, in particular gelling, and processing thermoplastic and rubber-like plastics
DE1217055B (en) * 1960-06-15 1966-05-18 Anton Johannes Vox Flow casting process and machine for the production of workpieces from thermoplastic material
DE2359329A1 (en) * 1972-11-29 1974-05-30 Saint Gobain SPRAY NOZZLE FOR PLASTICS
US4973239A (en) * 1988-08-01 1990-11-27 Werner & Pfleiderer Gmbh Apparatus for the extraction of melt samples from a material which is liquid at an elevated temperature, but solid at ambient temperature

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191300386A (en) * 1913-01-06 1913-08-14 John Clarkson Fiddyment Presses.
DE652990C (en) * 1935-07-26 1937-11-13 I G Farbenindustrie Akt Ges Device for the preparation of malleable masses, especially ceramic and rubber masses, with two interlocking, wide-pitched screws
CH198647A (en) * 1935-11-30 1938-07-15 Paul Leistritz Kneading machine.
DE682787C (en) * 1935-12-01 1939-10-21 Franz Burghauser Kneading pump
CH220550A (en) * 1939-02-06 1942-04-15 Liguna S A Method and apparatus for the continuous production of profiles of molten or pasty materials, in particular of plastics.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191300386A (en) * 1913-01-06 1913-08-14 John Clarkson Fiddyment Presses.
DE652990C (en) * 1935-07-26 1937-11-13 I G Farbenindustrie Akt Ges Device for the preparation of malleable masses, especially ceramic and rubber masses, with two interlocking, wide-pitched screws
CH198647A (en) * 1935-11-30 1938-07-15 Paul Leistritz Kneading machine.
DE682787C (en) * 1935-12-01 1939-10-21 Franz Burghauser Kneading pump
CH220550A (en) * 1939-02-06 1942-04-15 Liguna S A Method and apparatus for the continuous production of profiles of molten or pasty materials, in particular of plastics.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068460B (en) * 1959-11-05 R. H. Windsor Limited, South Chessington, 'Surbiton, Surrey (Großbritannien) Injection molding machine for processing thermoplastics
DE974124C (en) * 1950-03-08 1960-09-22 Carlo Pasquetti Screw press for processing thermoplastic materials
DE1168063B (en) * 1955-10-26 1964-04-16 Siemens Ag Screw press for preparing, in particular gelling, and processing thermoplastic and rubber-like plastics
DE1217055B (en) * 1960-06-15 1966-05-18 Anton Johannes Vox Flow casting process and machine for the production of workpieces from thermoplastic material
DE1155232B (en) * 1960-12-06 1963-10-03 Gerhard Kestermann Zahnraeder Screw extrusion press for processing thermoplastics
DE2359329A1 (en) * 1972-11-29 1974-05-30 Saint Gobain SPRAY NOZZLE FOR PLASTICS
US4973239A (en) * 1988-08-01 1990-11-27 Werner & Pfleiderer Gmbh Apparatus for the extraction of melt samples from a material which is liquid at an elevated temperature, but solid at ambient temperature

Similar Documents

Publication Publication Date Title
DE1779953A1 (en) Extrusion head of a blow molding machine
DE4210687C2 (en) Device for dispensing viscous, hardening substances, and method for operating such a device
DE884105C (en) Injection molding process and device for the production of all kinds of molded parts from thermoplastic materials
DE2445107A1 (en) METHOD AND DEVICE FOR MANUFACTURING INJECTION MOLDED PARTS
DE3400309A1 (en) Injection moulding machine for two-component silicone rubber, specifically of RTV grade
DE960854C (en) Injection molding machine
DE1729539A1 (en) Mixing device for processing multicomponent plastics to be made from fast-reacting prepolymers and their mixtures with additives
DE1135161B (en) Injection molding machine for processing thermoplastics
DE10163409B4 (en) Control for an injection molding compounder
DE851691C (en) Screw injection machine
DE2043997A1 (en) Injection molding process and equipment for its implementation
DE2814285A1 (en) Extruder for thermoplastics - uses screw with collar fitted at leading end to act as pressure ram during injection
DE2744058A1 (en) Injection moulding mottled thermoplastics articles - by plasticising components in separate plasticisers and different quantities and injecting into common head
DE2609855A1 (en) Injection moulding sandwich construction mouldings - with core and skin streams separately regulated before combining at injection nozzle
DE1629734A1 (en) Extrusion plant for better homogenization of warm plastic plastics
DE909821C (en) Device for spraying plastic and thermoplastic compounds, especially for spraying around wires, strands and other electrical conductors
DE2261922A1 (en) Temp. control of rotationally moulded hollow articles - using recycling line with programme controlled mixer servocontrolled to temp. in heating fluid line
AT305608B (en) Molding line for the production of objects from multi-component or foamable plastic
DE1261309B (en) Injection unit for an injection molding machine that processes thermoplastics
AT372039B (en) DEVICE FOR PRODUCING HOLLOW BODIES FROM THERMOPLASTIC PLASTIC
DE1729191C3 (en) Injection device for plasticizable compounds with a rotatable and axially displaceable plasticizing screw
DE2702649A1 (en) Polyethylene extruder feeding device - has hopper discharge opening provided with reciprocable presser foot whose stroke is controlled by end switches
DE1802694A1 (en) Plastifying and moulding plastics
DE1094447B (en) Injection molding machine for processing thermoplastics
DE1554999A1 (en) Process and device for the production of injection molded parts from two or more component plastics