CH247704A - Machine for performing kneading and mixing processes in a continuous operation. - Google Patents
Machine for performing kneading and mixing processes in a continuous operation.Info
- Publication number
- CH247704A CH247704A CH247704DA CH247704A CH 247704 A CH247704 A CH 247704A CH 247704D A CH247704D A CH 247704DA CH 247704 A CH247704 A CH 247704A
- Authority
- CH
- Switzerland
- Prior art keywords
- screw
- housing
- machine
- kneading
- mixing processes
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J17/00—Kneading machines for butter, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
- B29B7/422—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing
- B29B7/423—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing and oscillating axially
-
- 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
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
- B29C48/525—Conical 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
- 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
- B29C48/45—Axially movable screws
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
Maschine zur DurchfUhrung von Knet- und Mischprozessen in kontinuierlichem Arbeitsgang.
Für die Durchführung von : Enetprozes- sen in kontinuierlichem Arbeitsgang steht nach dem heutigen Stand der Technik eine kontinuierlich arbeitende Maschine zur Verfügung, die mittels zweier Schnecken nach dem Prinzip der Schraubenpumpe arbeitet.
Für viele Produkte, insbesondere Eautschukw und Kunststoffmischungen ist jedoch mit dieser Maschine keine genügende Knetwirkung zu erreichen.
Die Erfindung bezweckt, diesem Mangel abzuhelfen. Sie betrifft eine Maschine zur Durchführung von kontinuierlichen Knet- und Mischprozessen, die, im Gegensatz zu den obenerwähnten Maschinen, nur eine einzige Schnecke aufweist, und bei der im Hinblick auf den angestrebten Zweck besondere Vorkehrungen getroffen sind, um die Knetmasse auf ihrem Weg durch dieselbe in wiederholter Weise in den Arbeitgang zurückzuführen.
Auf der beiliegenden Zeichnung sind drei Ausführungsbeispiele des Erfindungsgegenstandes veranschaulicht :
Fig. 1 ist ein Längsschnitt durch das erste Ausführungsbeispiel ;
Fig. 2 und 3 sind Längsschnitte durch das zweite Ausführungsbeispiel bei verschiedenen Arbeitslagen;
Fig. 4 zeigt, in grösserem Massstabe, eine abwicklung der Schnecke nach Fig. 2 und 3, und
Fig. 5 ist ein Längsschnitt durch das dritte Ausführungsbeispiel.
Die Schnecke nach Fig. 1 ist eine konische Pressschnecke üblicher Bauart, deren Gehäuse 2 aber mit Umführungen 3 versehen ist. Im Betrieb presst der Schneckenkörper 1 die zu knetende Masse infolge des Druckunterschiedes zwischen den Schneckengängen durch die Umführungen 3 hindurch, wodurch diese Masse in wiederholter Weise in den Arbeitsgang zurückgeführt wird, so dass eine innige Vermischung aller Teilchen stattfindet.
Bei den Fig. 2 und 3 handelt es sich um eine zylindrische Schnecke, deren I < : Körper zwecks Bildung einzelner Schneckenflügel unterbrochene Schneckengänge aufweist. Das Schneckengehäuse 2 ist mit einem Eintrittsstutzen 3" und einem Autrittsstutzen 4 versehen. Ausserdem ist es an seiner Innenwand mit zahnartigen Vorsprüngen 5 versehen.
Schliesslich ist dieses Gehäuse 2 so gelagert, dass es sich in axialer Richtung hin-und herverschieben lässt, wozu ein Kurbelmechanis- mus dienen kann, wie es in den Fig. 2 und 3 gezeigt ist. Die Anordnung der Vorsprünge 5 an der Innenwand des Gehäuses 2 und der Lücken bildenden Unterbrechungen in den Schneckengängen ist so getroffen, das beim Umlauf des Schneckenkörpers 1 und der Hinund Herbewegung des Gehäuses 2 mit passenden Geschwindigkeiten die Vorsprünge 5 bei ihrer Hin- und Herbewegung immer wieder durch die Lücken in den Schneckengängen hindurchtreten. In Fig. 4 ist dieser Vorgang mittels einer Abwicklung der Schneckenflügel veranschaulicht.
In dieser Figur ist 5i die linke Endstellung der Vorsprünge, 5II die Stellung der Vorprünge im Augenblick des Durchtretens durch die Lükken im Schneckenkörper 1 und 5m die rechte Endstellung der Vorsprünge. Gegebenenfalls könnte dem Gehäuse 2 ausser einer Längs bewegung auch noch eine pendelnde Drehbewegung erteilt werden.
Die Fig. 2 und 3 zeigen die Maschine in ihren beiden : Endstellungen. In Fig. 2 ist das Gehäuse 2 nach rechts verschoben. Am Eintrittsstutzen 3" ist die Knetmasse mittels einer an sich bekannten Vorrichtung eingebracht oder eingepresst worden. Bei der Verschiebung des Gehäuses 2 nach links wird die am Eintrittsstutzen 3" sich befindende Masse in den Arbeitsgang hineinbefördert. Die Bewegung des Gehäuses 2 nach rechtes' hat gleichzeitig zur Folge, dass die auf die am Austrittsende des Gehäuses sich befindende Masse ein Druck ausgeübt wird, wodurch ein Ausstossen der Masse aus demAustrittsstutzen 4 stattfindet. Dieser Vorgang wird zweckmässig dadurch unterstützt, dass die letzten Schneckengänge keine Unterbrechungen aufweisen, so dass sie als Kolben im Gehäuse 2 wirken.
Die axiale Relativbewegung zwischen Schnecke und Gehäuse kann auch dadurch erreicht werden, dass das Gehäuse stehenbleibt und die Schnecke zusätzlich zu ihrer Drehbewegung axial eine und herbewegt wird.
In Fig. 5 ist eine konische Pressschnecke gezeigt, bei der sich das Gehäuse 2 ebenfalls eine und herverschieben lässt. Beim Verschiehen des Gehäuses in Richtung des Austrittes 4 hin entsteht zwischen dem Schneckenkörper 1 und dem Gehäuse 2 ein vergrösserter Zwischenraum, durch den hindurch ein Teil der Masse zufolge des Druckunterschiedes zwisehen den einzelnen Schneckengängen zu riickgedrängt wird, wodurch die Enetwir- kung erhöht wird. Um den Druckunterschied zwischen den Schneckengängen am Eintritts- ende zu erhöhen, wird der Schneckenkörper zweckmässig in der gezeichneten, konkaven
Form ausgeführt.
Bei einer solchen Bauart vergrössert sich der oben genannte Zwischen raum beim Verschieben des Gehäuses nicht gleichmässig, wie bei einer geraden Ausfüh rung, sondern er nimmt nach dem Eintritts stutzen 3' hin zu. Dadurch wird der Druck unterschied zwischen den ersten Schnecken gängen grösser und erhöht so das beabsich tigte Zurückdrängen der zu knetenden Masse.
Machine to carry out kneading and mixing processes in a continuous operation.
According to the current state of the art, a continuously working machine is available for the implementation of: etching processes in continuous operation, which works by means of two screws on the principle of the screw pump.
For many products, especially rubber and plastic mixtures, however, this machine cannot achieve a sufficient kneading effect.
The invention aims to remedy this deficiency. It relates to a machine for carrying out continuous kneading and mixing processes which, in contrast to the above-mentioned machines, has only a single screw, and in which, with a view to the intended purpose, special precautions are taken to keep the kneading material on its way through the same returned to the operation in a repeated manner.
Three exemplary embodiments of the subject matter of the invention are illustrated in the accompanying drawing:
Fig. 1 is a longitudinal section through the first embodiment;
2 and 3 are longitudinal sections through the second embodiment in different working positions;
Fig. 4 shows, on a larger scale, a development of the screw according to FIGS. 2 and 3, and
Fig. 5 is a longitudinal section through the third embodiment.
The screw according to FIG. 1 is a conical press screw of conventional design, the housing 2 of which, however, is provided with bypasses 3. During operation, the screw body 1 presses the mass to be kneaded through the bypasses 3 due to the pressure difference between the screw flights, whereby this mass is repeatedly returned to the operation so that all particles are intimately mixed.
2 and 3 is a cylindrical screw, the I <: body of which has interrupted screw flights for the purpose of forming individual screw wings. The screw housing 2 is provided with an inlet connection 3 ″ and an entry connection 4. In addition, it is provided with tooth-like projections 5 on its inner wall.
Finally, this housing 2 is mounted in such a way that it can be pushed back and forth in the axial direction, for which a crank mechanism, as shown in FIGS. 2 and 3, can serve. The arrangement of the projections 5 on the inner wall of the housing 2 and the gap-forming interruptions in the screw flights is made so that when the screw body 1 revolves and the housing 2 moves back and forth at suitable speeds, the projections 5 repeatedly during their back and forth movement pass through the gaps in the worm threads. In Fig. 4 this process is illustrated by means of a development of the screw blades.
In this figure, 5i is the left end position of the projections, 5II the position of the projections at the moment of passage through the gaps in the screw body 1 and 5m is the right end position of the projections. If necessary, the housing 2 could also be given a reciprocating rotary movement in addition to a longitudinal movement.
FIGS. 2 and 3 show the machine in its two end positions. In Fig. 2, the housing 2 is shifted to the right. The kneading mass has been introduced or pressed in at the inlet connection 3 ″ by means of a device known per se. When the housing 2 is moved to the left, the mass located at the inlet connection 3 ″ is conveyed into the operation. The movement of the housing 2 to the right at the same time has the consequence that a pressure is exerted on the mass located at the outlet end of the housing, as a result of which the mass is expelled from the outlet connector 4. This process is expediently supported by the fact that the last screw flights have no interruptions, so that they act as pistons in the housing 2.
The axial relative movement between the worm and the housing can also be achieved in that the housing stops and the worm is moved axially in and out in addition to its rotational movement.
In Fig. 5, a conical press screw is shown, in which the housing 2 can also be pushed out. When the housing is shifted in the direction of the outlet 4, an enlarged space is created between the screw body 1 and the housing 2, through which part of the mass is pushed back due to the pressure difference between the individual screw flights, whereby the effect is increased. In order to increase the pressure difference between the screw flights at the inlet end, the screw body is expediently in the concave shape shown
Form executed.
With such a design, the above-mentioned space does not increase evenly when the housing is moved, as in the case of a straight execution, but it increases after the inlet connector 3 '. This increases the pressure difference between the first screw threads and increases the intended push back of the mass to be kneaded.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH247704T | 1945-08-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH247704A true CH247704A (en) | 1947-03-31 |
Family
ID=4466388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH247704D CH247704A (en) | 1945-08-20 | 1945-08-20 | Machine for performing kneading and mixing processes in a continuous operation. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH247704A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE836345C (en) * | 1949-03-15 | 1952-04-10 | En Commandite Simple Paix & Ci | Device for the continuous mixing of two substances |
DE1000215B (en) * | 1953-11-11 | 1957-01-03 | Mannesmann Meer Ag | Revolving screw for mixing, kneading and pressing powder mixtures for sintered metals and plastics |
DE963688C (en) * | 1951-11-01 | 1957-05-09 | Hermann Heim Dipl Ing | Device for handling viscous, doughy, gritty or fibrous masses |
DE1111599B (en) * | 1958-06-04 | 1961-07-27 | Krauss Maffei Ag | Mixing and kneading device with discontinuous operation for plastic masses |
DE1147832B (en) * | 1955-04-05 | 1963-04-25 | Dow Chemical Co | Screw press for the extrusion of crushed or powdery light metal |
DE1168063B (en) * | 1955-10-26 | 1964-04-16 | Siemens Ag | Screw press for preparing, in particular gelling, and processing thermoplastic and rubber-like plastics |
DE1177327B (en) * | 1960-09-08 | 1964-09-03 | Elkemet Werk Lahnkunststoff G | Extrusion press for processing easily plasticizable plastics |
DE1187009B (en) * | 1957-04-30 | 1965-02-11 | Ankerwerk Gebr Goller | Screw extrusion press for processing thermoplastics or similar materials |
DE1195719B (en) * | 1957-06-21 | 1965-07-01 | Baker Perkins Holdings Ltd | Mixing device with an insert that can be rotated in a mixing chamber |
DE1200517B (en) * | 1957-04-30 | 1965-09-09 | Ankerwerk Gebr Goller | Screw extrusion press for processing plastics |
DE1207074B (en) * | 1959-12-31 | 1965-12-16 | Maillefer Sa | Method and device for processing thermoplastics in a screw press |
DE1241417B (en) * | 1962-09-28 | 1967-06-01 | Buss Ag | Continuously working mixing and kneading device |
DE1268823B (en) * | 1959-06-11 | 1968-05-22 | Dr Zareh Lorenian | Screw press for processing thermoplastic and / or thermally curable plastics |
DE1269334B (en) * | 1961-01-19 | 1968-05-30 | Wmb Internat Ab | Heatable screw press for producing porous bodies from thermoplastics based on polystyrene |
-
1945
- 1945-08-20 CH CH247704D patent/CH247704A/en unknown
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE836345C (en) * | 1949-03-15 | 1952-04-10 | En Commandite Simple Paix & Ci | Device for the continuous mixing of two substances |
DE963688C (en) * | 1951-11-01 | 1957-05-09 | Hermann Heim Dipl Ing | Device for handling viscous, doughy, gritty or fibrous masses |
DE1000215B (en) * | 1953-11-11 | 1957-01-03 | Mannesmann Meer Ag | Revolving screw for mixing, kneading and pressing powder mixtures for sintered metals and plastics |
DE1000215C2 (en) * | 1953-11-11 | 1957-06-13 | Mannesmann Meer Ag | Revolving screw for mixing, kneading and pressing powder mixtures for sintered metals and plastics |
DE1147832B (en) * | 1955-04-05 | 1963-04-25 | Dow Chemical Co | Screw press for the extrusion of crushed or powdery light metal |
DE1147832C2 (en) * | 1955-04-05 | 1963-11-14 | Dow Chemical Co | Screw press for extrusion of crushed or powdery light metal |
DE1168063B (en) * | 1955-10-26 | 1964-04-16 | Siemens Ag | Screw press for preparing, in particular gelling, and processing thermoplastic and rubber-like plastics |
DE1187009B (en) * | 1957-04-30 | 1965-02-11 | Ankerwerk Gebr Goller | Screw extrusion press for processing thermoplastics or similar materials |
DE1200517B (en) * | 1957-04-30 | 1965-09-09 | Ankerwerk Gebr Goller | Screw extrusion press for processing plastics |
DE1195719B (en) * | 1957-06-21 | 1965-07-01 | Baker Perkins Holdings Ltd | Mixing device with an insert that can be rotated in a mixing chamber |
DE1111599B (en) * | 1958-06-04 | 1961-07-27 | Krauss Maffei Ag | Mixing and kneading device with discontinuous operation for plastic masses |
DE1268823B (en) * | 1959-06-11 | 1968-05-22 | Dr Zareh Lorenian | Screw press for processing thermoplastic and / or thermally curable plastics |
DE1207074B (en) * | 1959-12-31 | 1965-12-16 | Maillefer Sa | Method and device for processing thermoplastics in a screw press |
DE1177327B (en) * | 1960-09-08 | 1964-09-03 | Elkemet Werk Lahnkunststoff G | Extrusion press for processing easily plasticizable plastics |
DE1269334B (en) * | 1961-01-19 | 1968-05-30 | Wmb Internat Ab | Heatable screw press for producing porous bodies from thermoplastics based on polystyrene |
DE1241417B (en) * | 1962-09-28 | 1967-06-01 | Buss Ag | Continuously working mixing and kneading device |
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