DE1178578B - Device for plasticizing and granulating thermoplastics - Google Patents
Device for plasticizing and granulating thermoplasticsInfo
- Publication number
- DE1178578B DE1178578B DET11859A DET0011859A DE1178578B DE 1178578 B DE1178578 B DE 1178578B DE T11859 A DET11859 A DE T11859A DE T0011859 A DET0011859 A DE T0011859A DE 1178578 B DE1178578 B DE 1178578B
- Authority
- DE
- Germany
- Prior art keywords
- granulating
- cutting
- plasticizing
- annular gap
- cylindrical
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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- 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
- B29C48/04—Particle-shaped
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0027—Cutting off
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
Vorrichtung zum Plastifizieren und Granulieren von thermoplastischen Kunststoffen Die Erfindung betrifft eine Vorrichtung zum Plastifizieren und Granulieren von thermoplastischen Kunststoffen mit gleichartigen, gleichachsigen, ineinander gesetzten und einen mehr oder weniger kegeligen sich in Bewegungsrichtung des Kunststoffes erweiternden Ringspalt bildenden Walzenflächen, deren eine relativ zur anderen umläuft, mit einer nachgeschalteten Granuliereinrichtung.Device for plasticizing and granulating thermoplastics Plastics The invention relates to a device for plasticizing and granulating of thermoplastics with similar, equiaxed, interlocking set and one more or less conical in the direction of movement of the plastic widening annular gap forming roller surfaces, one of which rotates relative to the other, with a downstream granulating device.
Es sind bereits Plastifiziermaschinen bekannt, welche mit einer Granuliervorrichtung ausgestattet sind, die direkt an die Maschinen angebaut ist. Bei den bekannten Maschinen werden die aus dem Ringspalt austretenden Rund schnüre aus durchgeliertem Material in einem konisch verlaufenden Ringspalt des Granulierkopfes geführt, der durch ihn umgebende Doppelmäntel gekühlt wird. In einem sich daran anschließenden zylindrischen Teil des Granulierkopfes wird der plastifizierte Kunststoff durch nach einem Spezialverfahren gebohrte Lochbleche gepreßt. Eine solche Granuliervorrichtung in Siebanordnung ist praktisch nur für die Verarbeitung von Weich-PVC geeignet. Das Auspressen durch die Lochbleche erfordert einen Kraftmehrbedarf von etwa 30 O/o, und die auftretende beträchtliche Wärmemenge muß zusätzlich abgeführt werden, was in der bekannten Anordnung durch Kühlrippen erreicht wird. There are already known plasticizing machines which have a granulating device that is attached directly to the machines. With the known machines the round cords emerging from the annular gap are made of fully gelled material guided in a conical annular gap of the granulating head, which passes through it surrounding double jackets is cooled. In an adjoining cylindrical The plasticized plastic becomes part of the granulating head using a special process Pressed drilled perforated sheets. Such a granulating device is in a sieve arrangement practically only suitable for processing soft PVC. The squeezing through the perforated plate requires an additional force of about 30 O / o, and the occurring considerable amount of heat must also be dissipated, which in the known arrangement is achieved by cooling fins.
Im Hinblick auf die Wärmebelastung des an den Lochblechen verdichteten Materials dürfte eine Verarbeitung von Hart-PVC nach der bekannten Anordnung in Frage gestellt werden. With regard to the heat load of the compacted on the perforated sheets Materials is likely to allow processing of rigid PVC according to the known arrangement in Question to be asked.
Bei bekannten anderen Vorrichtungen werden die in Schneckenpressen verkneteten Massen in besonderen Schneidmühlen granuliert. In known other devices in screw presses kneaded masses granulated in special granulators.
Erfindungsgemäß wird eine Plastifiziervorrichtung der eingangs geschilderten Art dadurch verbessert, daß als Granuliervorrichtung in Verlängerung der inneren konischen Walzenfläche eine zylindrische Schneidschnecke angeordnet ist, die stirnseitig und am Umfang messerartige Schneiden aufweist, der Außenmantel ebenfalls zylindrisch verlängert ist und zusammen mit der Schneidschnecke einen Ringspalt bildet. According to the invention, a plasticizing device is that described above Art improved in that as a granulating device in extension of the inner conical roller surface a cylindrical cutting worm is arranged, the end face and has knife-like cutting edges on the circumference, the outer jacket also being cylindrical is extended and forms an annular gap together with the cutting screw.
Beim Verlassen der Knetzone und beim Austritt aus dem Ringspalt der Geliermaschine werden die meist zu Rundschnüren verdrillten plastischen Stränge von den auf dem Umfang eines rotierenden Zylinders befindlichen Schneckengängen der Granuliervorrichtung aufgenommen und am Eingang zu den Schnekkengängen durch die messerartigen Schneiden zu Granulatkorn, z. B. von 3 bis 5 mm Länge zerkleinert. Auf dem Wege durch die Schneckengänge bis zum Austritt werden die Teilchen zu vorzugsweise kegelförmigem Granulat gerollt und gleichzeitig gekühlt. Die Größe des Granulatkornes ist abhängig von der Austrittsgeschwindigkeit der Massestränge und der darauf abgestimmten Gangzahl der Schnecke. When leaving the kneading zone and when exiting the annular gap The plastic strands that are mostly twisted into round cords are gelling machines of the screw flights on the circumference of a rotating cylinder the granulating device and at the entrance to the screw flights through the knife-like cutting to granulate, z. B. crushed from 3 to 5 mm in length. On the way through the worm threads up the particles become too preferential to exit cone-shaped granules rolled and chilled at the same time. The size of the granule grain depends on the exit speed of the mass strands and the one coordinated with them Number of flights of the worm.
Die Steigung der Schnecke ist so groß zu wählen, daß bei gegebener Austrittsgeschwindigkeit des Materials aus dem Ringspalt eine Stauung des Granulats in den Schneckengängen vermieden wird.The pitch of the screw is to be chosen so large that with a given The exit speed of the material from the annular gap creates a congestion of the granulate is avoided in the worm threads.
Die Schneckengänge werden zweckmäßig als Kühlzone ausgebildet, was man in einfacher Weise dadurch erreicht, daß die Schneidschnecke in an sich bekannter Weise hohl ausgebildet und mit Kühlmittelzuführungen versehen wird. The screw flights are expediently designed as a cooling zone, what can be achieved in a simple manner in that the cutting screw is known per se Way is made hollow and provided with coolant supplies.
Die zylindrische Verlängerung des Außenmantels weist gleichfalls in an sich bekannter Weise Kühlkanäle auf. The cylindrical extension of the outer jacket also has in a known manner on cooling channels.
Mit der Anordnung nach der Erfindung kann auf eine Schneidmühle zum Granulieren der mit der Plastifiziermaschine hergestellten Stränge verzichtet werden. Ferner wird mit der erfindungsgemäßen Granuliervorrichtung eine gleichmäßige Korngröße erzielt, wie sie mit Schneidmühlen kaum zu erreichen ist. Durch die zusätzliche Lagerung des Granulierkopfes erhält auch der Kegel in der Plastifiziermaschine einen ruhigeren Lauf. With the arrangement according to the invention, a cutting mill for Granulating the strands produced with the plasticizing machine can be dispensed with. Furthermore, the granulating device according to the invention produces a uniform grain size achieved in a way that can hardly be achieved with granulators. By the additional Storage of the granulating head is also given to the cone in the plasticizing machine smoother run.
Aus der Abbildung, die als Ausführungsbeispiel dient, sind die kennzeichnenden Merkmale nach der Erfindung zu entnehmen. Die aus dem Mantelgehäuse 1 und der Schneidschnecke 2 bestehende Granuliervorrichtung ist am Ringspaltausgang der Plastifiziermaschine 3 angeordnet. Um dem Kegel und dem Schneckenkörper einen ruhigeren Lauf zu geben, läuft die Hohlwelle 4 in einem Lager 5. Durch die Hohlwelle wird der Schneckenkörper von innen mit einer Wasserkühlung versehen, während die Außenkühlung durch Kühlrohre 6 im Mantelkörper erfolgt. From the figure, which serves as an exemplary embodiment, are the characteristic ones Features according to the invention can be found. The one from the casing 1 and the cutting screw 2 existing granulating device is at the annular gap exit of the plasticizing machine 3 arranged. To give the cone and the worm body a smoother run, the hollow shaft 4 runs in a bearing 5. The hollow shaft becomes the worm body from within provided with a water cooling, while the external cooling takes place through cooling tubes 6 in the jacket body.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET11859A DE1178578B (en) | 1956-02-10 | 1956-02-10 | Device for plasticizing and granulating thermoplastics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET11859A DE1178578B (en) | 1956-02-10 | 1956-02-10 | Device for plasticizing and granulating thermoplastics |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1178578B true DE1178578B (en) | 1964-09-24 |
Family
ID=7546844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET11859A Pending DE1178578B (en) | 1956-02-10 | 1956-02-10 | Device for plasticizing and granulating thermoplastics |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1178578B (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE749184C (en) * | 1938-04-29 | 1944-11-17 | Apparatus for producing synthetic resin press mixes | |
GB634901A (en) * | 1946-12-14 | 1950-03-29 | Bata | Improvements in and relating to the homogenisation of plastic masses |
DE763547C (en) * | 1939-01-18 | 1953-10-26 | Aug Nowack A G | Process for the preparation of press mixes from hardenable resins |
DE914551C (en) * | 1951-11-25 | 1954-07-05 | Wacker Chemie Gmbh | Method and device for plasticizing and / or gelling thermoplastics |
DE920270C (en) * | 1939-01-10 | 1954-11-18 | Richard Dr Hessen | Apparatus for producing synthetic resin press mixes |
-
1956
- 1956-02-10 DE DET11859A patent/DE1178578B/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE749184C (en) * | 1938-04-29 | 1944-11-17 | Apparatus for producing synthetic resin press mixes | |
DE920270C (en) * | 1939-01-10 | 1954-11-18 | Richard Dr Hessen | Apparatus for producing synthetic resin press mixes |
DE763547C (en) * | 1939-01-18 | 1953-10-26 | Aug Nowack A G | Process for the preparation of press mixes from hardenable resins |
GB634901A (en) * | 1946-12-14 | 1950-03-29 | Bata | Improvements in and relating to the homogenisation of plastic masses |
DE914551C (en) * | 1951-11-25 | 1954-07-05 | Wacker Chemie Gmbh | Method and device for plasticizing and / or gelling thermoplastics |
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