DE853345C - Process for homogenizing and refining rubber or similar plastic masses on rolling mills - Google Patents
Process for homogenizing and refining rubber or similar plastic masses on rolling millsInfo
- Publication number
- DE853345C DE853345C DEV1746D DEV0001746D DE853345C DE 853345 C DE853345 C DE 853345C DE V1746 D DEV1746 D DE V1746D DE V0001746 D DEV0001746 D DE V0001746D DE 853345 C DE853345 C DE 853345C
- Authority
- DE
- Germany
- Prior art keywords
- rubber
- rollers
- homogenizing
- plastic masses
- technology
- 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
Links
- 229920001971 elastomer Polymers 0.000 title claims description 10
- 238000005096 rolling process Methods 0.000 title claims description 6
- 239000004033 plastic Substances 0.000 title claims description 5
- 238000007670 refining Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims 3
- 239000000899 Gutta-Percha Substances 0.000 claims 1
- 240000000342 Palaquium gutta Species 0.000 claims 1
- 229920000588 gutta-percha Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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
- B29B7/52—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
- B29B7/56—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set
-
- 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
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
Verfahren zum Homogenisieren und Verfeinern von Kautschuk oder ähnlichen plastischen Massen auf Walzwerken Zum Homogenisieren und Verfeinern von Kautschuk od. dgl. plastischen Anlassen dienen im allgemeinen Walzwerke, deren eng zusammenstehende Walzen mit verschiedenen Umfangsgeschwindigkeiten angetrieben sind und bei denen die schneller laufende Walze etwa 1,5- bis 3mal so schnell umläuft als die langsam laufende Walze. Die irerschiedenen Umfangsgeschwindigkeiten werden hiebei dadurch herbeigeführt, daß zwischen den Walzen ein bestimmtes Übersetzungsverhältnis geschaffen wurde. Da aber die i?eil>nngsverbältnisse in dem Einzugsspalt nicht nur von dem Übersetzungsverhältllis, sondern auch bei gleichem Übersetzungsverhältnis von dem Durchmesser der Walzen abhängig ist, kann durch die Wahl des Übersetzungsverhältnisses, das zu verschiedenen Umfangsgeschwindigkeiten der Walzen führt, das Reibungsverhältnis und damit die Güte des Arbeitsergebnisses nicht eirideutig festgelegt werden.Process for homogenizing and refining rubber or the like plastic masses on rolling mills For homogenizing and refining rubber od. The like. Plastic annealing are generally used in rolling mills whose closely spaced Rollers are driven at different peripheral speeds and at which the faster running roller rotates about 1.5 to 3 times as fast as the slow one running roller. This results in the different peripheral speeds caused a certain transmission ratio to be created between the rollers became. But since the i? Eil> nngsverbältnisse in the feed slot not only from that Transmission ratio, but also with the same transmission ratio of the Depends on the diameter of the rollers, by choosing the transmission ratio, which leads to different circumferential speeds of the rollers, the friction ratio and thus the quality of the work result is not clearly defined.
Weiterhin hat man sich bisher damit begnügt, die sich durch die verschiedenen Umfangsg.eschwindigkeiten der Walzen ergebende Differenz derselben möglichst klein zu halten und versucht, ein günstiges Arbeitsergebnis durch entsprechende Wahl der Walzendurchmesser und der absoluten Drehzahlen zu erreichen. Es hat sich nun gezeigt daß ein bestes Arbeitsergebnis sowohl bezüglich des Grades der Verfeinerung als auch der Arbeitsleistung beim Homogenisieren und Verfeinern von Kautschuk od.dgl. plastischen Massen auf einem Walzwerk dann erreicht wird, wenn die jeweils zusammenarbeitenden Walzen mit einer Differenz der Umfangsgeschwindigkeit angetrieben werden, dlie größer ist als 0,5 m/Sek., wobei die absoluten Drehzahlen den jeweiligen Betriebsbedingungen entsprechend festgesetzt werden können. In Sonderfällen beispielsweise, wenn es darauf ankommt, die Temperatur der Walzen sehr niedrigizu halten, können die absoluten Drehzahlen soweit gesenkt werden, daß eine der Walzen mit einer praktisch gleichkommenden Drehzahl angetrieben wird. Furthermore, one has so far been content with looking through the various The difference in circumferential speeds of the rollers is as small as possible to keep and tries to achieve a favorable work result by appropriate choice of To achieve roller diameter and absolute speeds. It has now been shown that a best work result both in terms of degree of refinement and also the work performance at Homogenize and refine Rubber or the like. plastic masses on a rolling mill is achieved when the respective co-operating rollers with a difference in peripheral speed are driven, dlie is greater than 0.5 m / sec., the absolute speeds can be set according to the respective operating conditions. In special cases for example, when it comes to keeping the temperature of the rollers very low hold, the absolute speeds can be reduced so far that one of the rollers is driven at a practically equivalent speed.
Die Einhaltung einer derart großen Differenz der Umfangsgeschwindigkeit gewährleistet für die Verarbeitung, insbesondere das Verfeinern von Kautschuk, die günstigsten Reibungsverhältn,isse in dem Einzugsspalt. Das neue Verfahren ist dabei unabhängig von dem Durchmesser bzw. den absoluten Drehzahlen der Walzen, die trotz der großen Differenz in der Umfangsgeschwindigkeit klein gehalten werden können, so daß die Abmessungen der Walzwerke und der Kraftbedarf gering sind An sich sind Knetwalzwerke bekannt, bei denen die Mischsalze bei doppelt so großem Durchmesser wie die mit ihr zusammenarbeitenden Knetwalzen mit etwa der halben Umfangsgeschwindigkeit gegenüber derjenigen der Knetwalzen angetrieben, ist und dabei gegenüber den sonst üblichen Ausbildungen eine auf ein Drittel herabgesetzte Drehzahl erhält. Hier sollte durch den verschieden großen Walzendurchmesser bei einer gegebenen Drehzahl für die Knetwalzen eine möglichst kleine Drehzahl der Hauptwa.lze erreicht werden, um eine übermäßige Erhitzung zu verhüten Nicht erkannt wurde dagegen, daß nur durch die Wahl einer möglichst großen Differenz der Umfangsgeschwindigkeit der Walzen unabhängig von den absoluten Drehzahlen oder Walzendurchmessern ein bestes Arbeitsergebnis erzielt werden kann, wobei die eine der Walzen nahezu stillstehen kann, also auch absolut kleine Umlaufzahlen und damit geringste Temperatursteigerung erreicht werden können. Compliance with such a large difference in peripheral speed guarantees for the processing, especially the refining of rubber, which The most favorable friction conditions are in the feed gap. The new procedure is included regardless of the diameter or the absolute speeds of the rollers, which despite the large difference in peripheral speed can be kept small, so that the dimensions of the rolling mills and the power requirement are small per se Kneading mills known in which the mixed salts are twice as large in diameter like the kneading drums that work with it at about half the peripheral speed is driven compared to that of the kneading rollers, and compared to the otherwise usual training receives a speed reduced to a third. Here should be due to the different sized roller diameters at a given speed for the kneading rollers as low a speed as possible for the main roller to prevent excessive heating It was not recognized that only through the choice of the largest possible difference in the circumferential speed of the rollers The best work result regardless of the absolute speeds or roller diameters can be achieved, one of the rollers can almost stand still, so too absolutely small numbers of revolutions and thus the lowest temperature increase can be achieved can.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV1746D DE853345C (en) | 1940-07-23 | 1940-07-23 | Process for homogenizing and refining rubber or similar plastic masses on rolling mills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV1746D DE853345C (en) | 1940-07-23 | 1940-07-23 | Process for homogenizing and refining rubber or similar plastic masses on rolling mills |
Publications (1)
Publication Number | Publication Date |
---|---|
DE853345C true DE853345C (en) | 1952-10-23 |
Family
ID=7569800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV1746D Expired DE853345C (en) | 1940-07-23 | 1940-07-23 | Process for homogenizing and refining rubber or similar plastic masses on rolling mills |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE853345C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014110499A3 (en) * | 2013-01-14 | 2014-09-12 | Cabot Corporation | Method and apparatus for processing elastomer composite |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1850450A (en) * | 1929-04-05 | 1932-03-22 | Gen Tire & Rubber Co | Rubber mixing mill |
GB381822A (en) * | 1931-06-04 | 1932-10-13 | Firestone Tire & Rubber Co | Improvements in or relating to methods of and apparatus for treating rubber compositions |
US1930873A (en) * | 1929-09-26 | 1933-10-17 | Farrel Birmingham Co Inc | Rubber refining machine |
DE658314C (en) * | 1935-01-13 | 1938-03-26 | Celluloid Fabrik Deutsche | Process for the production of films from cellulose derivatives |
DE669760C (en) * | 1939-01-03 | Auguste Frerotte | Roller mill |
-
1940
- 1940-07-23 DE DEV1746D patent/DE853345C/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE669760C (en) * | 1939-01-03 | Auguste Frerotte | Roller mill | |
US1850450A (en) * | 1929-04-05 | 1932-03-22 | Gen Tire & Rubber Co | Rubber mixing mill |
US1930873A (en) * | 1929-09-26 | 1933-10-17 | Farrel Birmingham Co Inc | Rubber refining machine |
GB381822A (en) * | 1931-06-04 | 1932-10-13 | Firestone Tire & Rubber Co | Improvements in or relating to methods of and apparatus for treating rubber compositions |
DE658314C (en) * | 1935-01-13 | 1938-03-26 | Celluloid Fabrik Deutsche | Process for the production of films from cellulose derivatives |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014110499A3 (en) * | 2013-01-14 | 2014-09-12 | Cabot Corporation | Method and apparatus for processing elastomer composite |
US9855686B2 (en) | 2013-01-14 | 2018-01-02 | Cabot Corporation | Method and apparatus for processing elastomer composite |
US10730211B2 (en) | 2013-01-14 | 2020-08-04 | Cabot Corporation | Method and apparatus for processing elastomer composite |
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