DE2743844C2 - Process for achieving a thickness of the press nip of a calender that is constant over the entire length of the roll - Google Patents
Process for achieving a thickness of the press nip of a calender that is constant over the entire length of the rollInfo
- Publication number
- DE2743844C2 DE2743844C2 DE19772743844 DE2743844A DE2743844C2 DE 2743844 C2 DE2743844 C2 DE 2743844C2 DE 19772743844 DE19772743844 DE 19772743844 DE 2743844 A DE2743844 A DE 2743844A DE 2743844 C2 DE2743844 C2 DE 2743844C2
- Authority
- DE
- Germany
- Prior art keywords
- roller
- rollers
- calender
- load
- last
- 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
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/002—Opening or closing mechanisms; Regulating the pressure
- D21G1/0026—Arrangements for maintaining uniform nip conditions
- D21G1/0033—Arrangements for maintaining uniform nip conditions by offsetting the roll axes horizontally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
-
- 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
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/68—Positioning of rollers
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/24—Calendering
- B29C43/245—Adjusting calender parameters, e.g. bank quantity
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
f—— —f—— -
33
§| peratur der betreffenden Walze vorgesehen.§ | temperature of the roller in question provided.
β Die Erfindung wird nachfolgend anhand eines in derβ The invention is based on one in the
ίί; zelnen erläutert Es zeigtίί; individually explained It shows
|v Fi g. 1 eine schematisch vereinfacht gezeichnete Sei-| v Fi g. 1 shows a schematically simplified side
h F i g. 2 in schematisierter Darstellung die Ausbiegung H F i g. 2 shows the deflection in a schematic representation
% wählten Walzendurchmessern, wenn die Walzen in ei-•i ner gemeinsamen Ebene angeordnet sind, und % selected roller diameters when the rollers are arranged in a common plane, and
■ i Fig.3 die Ausbiegung der Walzen gemäß Fig.2,■ i Fig.3 the bending of the rollers according to Fig.2,
■; wenn die zweitletzte Walze eine seitliche Lageverschief bung erhalten hat, wie sie in F i g. 1 gezeigt ist■; if the penultimate roller has misaligned a lateral position has received exercise as shown in FIG. 1 is shown
F i g. 1 zeigt einen Walzensatz entsprechend einem gewöhnlichen Kunststoff-Kalander, bei dem das Kunst- : Stoffmaterial zwischen erste und zweite Walzen 1 und 2 eingegeben wird, von wo es durch die Preßspalte zwi- i}, sehen nachfolgenden Walzen 3 und 4 geführt wird, um M dadurch zu einer Folie vorbesürnmier Stärke gepreßt ; zu werden. Die Durchmesser der Walzen 2, J und 4 '.; relativ zueinander sind in solcher Weise gewählt, daß die Walzen 3 und 4 unter den unterschiedlichen Lastbe- ; dingungen, die auftreten, in im wesentlichen ähnlicher Weise ausgebogen werden. Der Durchmesser der Walze 3 ist daher geringer als der Durchmesser der Walze 4, ; welche wiederum einen geringeren Durchmesser besitzt als die Walze 2. Der Durchmesser der Wa'ze 4 ist jedoch etwas größer ausgelegt, als es aufgrund der Berechnungen für eine genau identische Ausbiegung der Walzen 3 und 4 erforderlich ist In diesem Fall weist der '■ ■'; letzte Preßspalt zwischen den Walzen 3 und 4 die in F i g. 2 gezeigte Form auf, wenn die Achsen der Walzen 2,3 und 4 in der gleichen Ebene angeordnet sind. An- ~. schließend wird das Profil des letzten Preßspalts durch Verschieben der Walze 3 genau eingestellt, wobei die ; Achse der Walze 3 bei der Verschiebung, die in von der gemeinsamen Ebene der Waken weg gerichteter Richtung erfolgt, parallel zu den Achsen der übrigen Walzen gehalten wird, wodurch die Möglichkeit geschaffen wird, daß sich die Walze 3 in einer von der Ebene weg nach auswärts gerichteten Richtung ausbiegen kann, um da durch eine Kompensation der schmäleren Spaltbreite im mittleren Bereich des Preßspalts zu bewirken. Die Walze 2 und'oder die Walze A- müssen dann natürlich in der gemeinsamen Walzenebene gegen die Walze 3 hin verschoben werden, um den Druck am Preßspalt auf dem gewünschten Wert zu halten. Die Verschiebung der Walze 3 wird immer so durchgeführt, daß ihre Achse zu den anderen Walzenachsen parallel bleibtF i g. 1 shows a roller set according to an ordinary plastic calender in which the Art: material between first and second rollers 1 and 2 is entered, where it be- through the press nips i}, see subsequent rolls 3 and 4 is guided to M pressed into a film of vorbesürnmier starch; to become. The diameters of rollers 2, J and 4 '.; relative to each other are chosen in such a way that the rollers 3 and 4 under the different load; conditions that occur are deflected in a substantially similar manner. The diameter of the roller 3 is therefore smaller than the diameter of the roller 4; which in turn has a smaller diameter than the roller 2. The diameter of the roller 4 is, however, somewhat larger than is necessary on the basis of the calculations for an exactly identical deflection of the rollers 3 and 4. In this case, the '■ ■'; last press nip between the rollers 3 and 4 in F i g. 2 when the axes of the rollers 2, 3 and 4 are arranged in the same plane. To ~. finally, the profile of the last press nip is set precisely by moving the roller 3, the; Axis of roller 3 is kept parallel to the axes of the other rollers during the displacement, which takes place in a direction away from the common plane of the wakes, whereby the possibility is created that roller 3 is outwardly in a direction away from the plane can bend in the direction in order to compensate for the narrower gap width in the central area of the press gap. The roller 2 and 'or the roller A- then of course have to be shifted in the common roller plane towards the roller 3 in order to keep the pressure at the press nip at the desired value. The displacement of the roller 3 is always carried out so that its axis remains parallel to the other roller axes
Die Walze 3 kann geradlinig von der Ebene weg verschoben werden oder längs einer bogenförmig gekrümmten Bahn entsprechend dem Umfang einer der Walze 2 oder 4.The roller 3 can be moved in a straight line away from the plane or along an arcuately curved path corresponding to the circumference of one of the Roller 2 or 4.
Für die praktische Durchführung der Regelung des Preßspalts können die im Hauptpatent gezeigten Methoden zum Messen der Walzenausbiegung und/oder der Stärke und die Kethoden zum Übertragen der Meßergebnisse auf die einzelnen Steuereinrichtungen, beispielsweise ein Komputer, zur Anwendung gebracht werden.For the practical implementation of the regulation of the press gap, the methods shown in the main patent can be used for measuring the roll deflection and / or the thickness and the methods for transferring the measurement results brought to the individual control devices, such as a computer, applied will.
~~~~~~
Claims (1)
Preßspalt in seinem mittleren Bereich, verglichen mit Aus der DE-PS 8 S3 260 ist es zwar bereits bekanntIn the case of the method according to the main patent, 50 can come. It should nevertheless be possible to achieve a roll with a convex curvature, even with the presence of WaI, i.e. a so-called cambered roll, for the roll whose surface has a curvature-reliable setting of the last press nip of the cam . The strength zen with slightly different properties, and woder crowning is chosen so that when operating the expensive crowned curvature at least one of the calender under maximum work load in the last 55 rolls of the calender, as they are according to the method of the press nip along its entire Gap width is provided according to the main patent, a constant gap thickness is superfluous. If the load falls below this maximum value according to the invention due to the maximum value in the patent, then the last claim is reached
Press gap in its central area, compared with From DE-PS 8 S3 260 it is already known
dadurch das engere Profil im mittleren Bereich des Die Wahl der Größe des Umschlingungswinkels istthe edge areas, closer. According to the main patent 60 in a drawing calender with at least three rollers, in this case one of the rollers of the calender: ne or more rollers to be arranged in such a way that they are preferably both a roller forming a press nip, relatively adjustable in the horizontal as well as in the vertical plane moved to the common roller plane, where is. The adjustment of the roller in question takes place because the axis of this roller is parallel to the axes of the rest of the roller, however, it is kept exclusively with regard to the adjustment of the rollers. This enables the nip pressure to be increased and, in particular, to select the size of these displaced rollers in a direction away from the joint of the contact arc of the rolling stock with the roller plane around the surface (wrap angle).
This means that the narrower profile in the middle area of the The choice of the size of the wrap angle is
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772743844 DE2743844C2 (en) | 1976-03-30 | 1977-09-29 | Process for achieving a thickness of the press nip of a calender that is constant over the entire length of the roll |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI760841A FI64902C (en) | 1976-03-30 | 1976-03-30 | COMPENSATION FOR COMPENSATION OF VALUES AND ENVIRONMENT |
DE19772743844 DE2743844C2 (en) | 1976-03-30 | 1977-09-29 | Process for achieving a thickness of the press nip of a calender that is constant over the entire length of the roll |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2743844A1 DE2743844A1 (en) | 1979-04-12 |
DE2743844C2 true DE2743844C2 (en) | 1986-01-02 |
Family
ID=25772818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19772743844 Expired DE2743844C2 (en) | 1976-03-30 | 1977-09-29 | Process for achieving a thickness of the press nip of a calender that is constant over the entire length of the roll |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2743844C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004033235A1 (en) * | 2004-07-08 | 2006-02-02 | Breyer Gmbh Maschinenfabrik | Method for operating a four-roll calender |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE893260C (en) * | 1951-07-01 | 1953-10-15 | Erich Devermann | Calenders or rolling mills, in particular drawing calenders |
-
1977
- 1977-09-29 DE DE19772743844 patent/DE2743844C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2743844A1 (en) | 1979-04-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2713917C3 (en) | Process for achieving a thickness of the press nip of a calender that is constant over the entire length of the roll | |
DE2334492C2 (en) | Device for the continuous control of the flatness and parallelism of rolling stock surfaces | |
DE3873103T2 (en) | METAL ROLLING METHOD WITH WORK ROLLS SLIDING IN THE AXIAL DIRECTION. | |
DE2543738C3 (en) | Calender for foils made of thermoplastic or elastomeric material | |
DE3639244A1 (en) | ROLLING DEVICE FOR MOVING RAILWAYS | |
EP0910486A1 (en) | Method and modular-multistation device for folding profiles | |
DE3020669A1 (en) | METHOD FOR CONTROLLING THE LINE PRESSURE DISTRIBUTION IN A ROLLING DEVICE AND CORRESPONDING ROLLING DEVICE | |
DE3245090A1 (en) | METHOD AND DEVICE FOR ROLLING METAL STRIPS | |
EP0152810B1 (en) | Method for rolling foils from aluminium | |
DE19839614A1 (en) | Bending roller process for the production of electrical composite tubes by means of a roller bearing | |
DE2848295C2 (en) | Calender for the production of thermoplastic films | |
DE69502447T2 (en) | Device for compensating the changes in length of at least two wires or rods in a pulling device | |
DE2743844C2 (en) | Process for achieving a thickness of the press nip of a calender that is constant over the entire length of the roll | |
EP1197272B1 (en) | Bending machine with two rolls and method of round bending plates | |
EP0149108B1 (en) | Roller assembly | |
EP1634989A1 (en) | Apparatus for correcting weft distortions in a textile web | |
DE19962754A1 (en) | Process for flexibly rolling a metal strip comprises carrying out a compensation of the temperature influence effecting the metal strip during rolling to avoid deviations | |
DE4345345C2 (en) | roller | |
DE69924466T2 (en) | SCREENING DEVICE FOR LIQUIDS | |
DE3400608C2 (en) | Roll stand with an offset intermediate roll inserted between the work roll and the back-up roll | |
EP1080800A2 (en) | Method for flexibly rolling a metal strip | |
DE3404833C2 (en) | ||
DE3811847C2 (en) | ||
DE3113659C2 (en) | Pressure fixing device for toner images in a photocopier | |
DE3245031A1 (en) | Rolling stand |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8128 | New person/name/address of the agent |
Representative=s name: BARTELS, H. HELD, M., DIPL.-ING. DR.-ING., PAT.-AN |
|
AF | Is addition to no. |
Ref country code: DE Ref document number: 2713917 Format of ref document f/p: P |
|
AF | Is addition to no. |
Ref country code: DE Ref document number: 2713917 Format of ref document f/p: P |
|
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8340 | Patent of addition ceased/non-payment of fee of main patent |