DE3319279A1 - Polishing stack for thermoplastic sheets and films of different melt viscosities - Google Patents
Polishing stack for thermoplastic sheets and films of different melt viscositiesInfo
- Publication number
- DE3319279A1 DE3319279A1 DE19833319279 DE3319279A DE3319279A1 DE 3319279 A1 DE3319279 A1 DE 3319279A1 DE 19833319279 DE19833319279 DE 19833319279 DE 3319279 A DE3319279 A DE 3319279A DE 3319279 A1 DE3319279 A1 DE 3319279A1
- Authority
- DE
- Germany
- Prior art keywords
- polishing
- roller
- plates
- calender
- different viscosities
- 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.)
- Ceased
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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0072—Roughness, e.g. anti-slip
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Glättwerk für thermoplastische Platten und FolienCalender for thermoplastic sheets and foils
verschiedener Schmeizviskositäten 1. Stand der Technik Kunststoff-Folien, hergestellt auf einer Bseitschlitzdüse, bedürfen zur Verfeinerung der Oberfläche einer Glättung im thermoplastischen Bereich. Das Glättwerk besteht hier im allgemeinen aus einer hochglanzpolierten oder entsprechend profilierten Metall-Abzugswalze, kombiniert mit einer druckbelasteten, ebenfalls oberflächenbehandelten Metall-Gegen walze (Presseur). Derartige Glättwerkzeuge sind üblich bei hochviskosen Kunststoff-Materialien, wie Polypropylen, Polyäthylen, Polystyrol und Polyamid. Durch die hohe Viskosität sind Stärkeunterschiede dabei mit dieser Maßnahme noch zu überbrücken, es setzt jedoch eine genaue Regulierung der vorgeschalteten Breitschlitzdüse voraus. Kunststoff-Folien mit anderem viskosen Verhalten in der Schmelze, vor allen Dingen mit Fließspuren herrührend von der Schneckenarbeit, bzw. von der Beschaffenheit der Düse sind mit diesen Maßnahmen nicht mehr zu bewältigen. Hier wird speziell auf die Verarbeitung von Hart-PVC aber auch ähnlich gearteter Kunststoffe gezielt, die als Glättwerk einen 3-4-Walzenkalander benötigen. Außerdem sind enorme Aufwendungen für den Antrieb dieser Walzen für die Vermeidung der Durchbiegung, für die Lagerung und für das thermische Gleichgewicht zu berücksichtigen.different melt viscosities 1. State of the art plastic films, made on a side slot nozzle, need to refine the surface smoothing in the thermoplastic area. The smoothing works here in general from a highly polished or appropriately profiled metal take-off roller, combined with a pressure-loaded, also surface-treated metal counter roller (impression roller). Such smoothing tools are common with highly viscous plastic materials, such as polypropylene, polyethylene, polystyrene and polyamide. Due to the high viscosity if strength differences are still to be bridged with this measure, it sets however, a precise regulation of the upstream slot nozzle is required. Plastic foils with different viscous behavior in the melt, especially with flow marks originating from the work of the worm or from the nature of the nozzle are included can no longer cope with these measures. Here is special on the processing of rigid PVC but also of similar types of plastics, which are used as a smoothing unit need a 3-4 roller calender. In addition, there are enormous expenses for the drive of these rollers for the avoidance of the deflection, for the storage and for the thermal equilibrium to be considered.
Da diese Verfahren einen Knet (Wulst) vor dem Walzenspalt in kauf nehmen so daß das unregelmäßige arbeiten der Düsenpartien noch in gewissen Grenzen egalisiert werden kann. Because this method is a kneading (bead) in front of the nip in purchase take so that the irregular work of the nozzle sections still within certain limits can be equalized.
2. Erfindungsgemäß kann der gesamte Aufwand einfacher und preisgünstiger gelöst werden durch die hiermit erfolgende Beschreibung: Das Material tHaDt-PVC) kommt in der höchstzulässizen Temoeratur aus der Düse Fig. I (1). Ein Staubalken (2) mit einer so bemessenen Stärke t33 daß er im Bereich der Gültigkeit des Hook'schen Gesetzes noch ohne bleibende Deformation verformt werden kann und gleichzeitig alle Materialstärkeschwankungen aufnimmt, wird reguliert durch zwei konzentrische Schrauben mit Feingewinde die in dichtem Abstand angeordnet sind, so daß bereits hier eine Feinregulierung der austretenden Folien-oder Plattenbahn vorgenommen werden kann. Die mit Feingewinde versehenen, sich zentrierenden Schrauben können sowohl Druckals auch Zug auf den Staubalken (2) ausüben. Die Folienbahn tritt nun tangential auf die Abzugswalze C53 nach vollzogener Reckung im Reckbereich t6) ergibt sich die Endstärke der Folie in Abhängigkeit der Drehzahl der Walze t5). Am Walzenspalt Fig. II (7) geschieht nun die Bildung der Oberfläche, paarweise durch die Walze t5) und durch das Stahl-, Metall- oder ein für die nachfolgend beschriebenen Erfordernisse zweckmäßiges Band t8).2. According to the invention, the entire effort can be simpler and cheaper can be solved by the following description: The material tHaDt-PVC) comes out of the nozzle Fig. I (1) at the highest permissible temperature. A jam bar (2) with a thickness t33 such that it is within the range of the validity of Hook's Law can still be deformed without permanent deformation and at the same time all Absorbs material thickness fluctuations, is regulated by two concentric screws with fine thread which are arranged in close spacing, so that already here a Fine adjustment of the exiting foil or panel web can be carried out. The finely threaded, centering screws can handle both pressure and also exert tension on the jam bar (2). The film web now occurs tangentially the take-off roller C53 after the stretching has been completed in the stretching area t6) results in the Final thickness of the film depending on the speed of the roller t5). At the nip Fig. II (7) is now the formation of the surface, in pairs by the roller t5) and by the steel, metal or one for the requirements described below appropriate tape t8).
Eine als Presseur fungierende elastische Walze Fig. I t93 mit festlegbarer Shore-Härte und druckbeaufschlagt durch einen hydraulischen oder pressluftbeaufschlagten Zylinder sorgt für den erforderlichen Anpressdruck zwischen Band t8) und der#Walze C5.An elastic roller, Fig. I t93, which functions as an impression roller and which can be fixed Shore hardness and pressurized by a hydraulic or pressurized air The cylinder provides the necessary contact pressure between belt t8) and the # roller C5.
Fig. II zeigt die Wirkungsweise dieser Einrichtung von hinten.Fig. II shows the operation of this device from behind.
Die in Punkt £17) Fig. II gekennzeichnete Berührungslinie ist die Stelle des größten Pressdruckes. Die Kautschukwalze Fig. I (9). deformiert sich an dieser Stelle und bewirkt je nach eingestelltem Druck des hydraulisch oder pneumatisch wirkenden Zylinder tt°) eine stärkere oder geringere Deformation die wiederum auch abhängt von der Shore-Härte der Walze (9). Es entsteht nun im Bereich (14) eine annähernd plane Fläche des Stahlbandes (8) was zur Folge hat, daß nun je nach Metallstärke des Bandes (B) und des Anpressdruckes des Presseurs (9) die Möglichkeit besteht die gesamte Ouerlage Fig. II t18) noch bei geringen Stärkeunterschieden oberflächenmäßig zu überbrücken. Die Planstrecke Fig. I und IV (14) die sich ausbildet, läßt diese Differenzen zu. Zusätzlich kann die Planstrecke (14) in der Größe variiert werden durch den Abstandhalter Fig. I (15) zwischen Walze (9) und Umlenkwalze (12) so daß sie beim Spannen des Bandes sich verkleinert und zwar beiderseitig von Punkt 13). Der Abstand (15a) ist so gewählt, daß das Stahlband t8) auf dieser Strecke die aufgenommene Wärme an die Umgebungstemperatur abgeben kann.The line of contact marked in point £ 17) Fig. II is the Place of the greatest pressing pressure. The rubber roller Fig. I (9). deforms at this point and, depending on the pressure set, causes the hydraulic or pneumatic acting cylinder tt °) a greater or lesser deformation which in turn also depends on the Shore hardness of the roller (9). A is now created in area (14) approximately flat surface of the steel strip (8) with the result that now, depending on the thickness of the metal the belt (B) and the contact pressure of the impression roller (9) is possible the entire Ouerlage Fig. II t18) even with slight differences in thickness in terms of surface area to bridge. The plan route Fig. I and IV (14) that forms, leaves this Differences too. In addition, the plan section (14) can be varied in size through the spacer Fig. I (15) between roller (9) and deflection roller (12) so that it decreases in size when the belt is tensioned, on both sides from point 13). The distance (15a) is chosen so that the steel strip t8) the recorded on this route Can give off heat to the ambient temperature.
Dadurch ist der elastische Presseur vor vorzeitigen Verschleiß durch thermische Einflüsse geschützt. Zusätzlich kann durch Heizung (16) bzw. Gebläse 173 das Band thermisch reguliert werden.This means that the elastic impression roller is protected from premature wear thermal influences protected. In addition, the heater (16) or fan 173 the tape can be thermally regulated.
Das Band Fig. I (8) kann entweder eine hochglänzende Oberfläche erzeugen oder je nach Strukturierung eine matte oder geprägte Oberfläche. Das selbe trifft zu für die Gegenwalze es) .The tape Fig. I (8) can either produce a high-gloss surface or, depending on the structure, a matt or embossed surface. The same applies too for the counter roll it).
Fig. III stellt analog eine Variante dieser Ausführung dar.III shows a variant of this embodiment.
Hierbei ist das Glättband (8) mit einem elastischen Belag versehen der dem Belag (9) entspricht. Der Presseurkern (10) ist nun unbeschichtet. Es handelt sich hier um eine Metallwalze. Die beiden Umlenkwalzen 123 können analog zur Fig. I verstellt werden mittels Handrad cm93.The smoothing belt (8) is provided with an elastic covering which corresponds to the lining (9). The impression roller core (10) is now uncoated. It deals here is a metal roller. The two deflection rollers 123 can analogously to FIG. I can be adjusted using the cm93 handwheel.
Das empfindliche Prägeband bedarf besonderer Maßnahmen zur Parallel-Führung um nicht seitlich gegen Bauteile anzulaufen und um im Dauerbetrieb keiner einseitigen Dehnung unterworfen zu werden. Entsprechende Parallellaufeinrichtungen wie sie z.B. im Offsetdruck eingesetzt werden, können hier ebenfalls angewendet werden wie Lichtschranken mit entsprechenden Verstellmechanismen für die Umlenkwalze (12).The sensitive embossing tape requires special measures for parallel guidance in order not to run into the side of components and to avoid one-sided during continuous operation To be subjected to stretching. Corresponding parallel running devices such as e.g. are used in offset printing, can also be used here like light barriers with corresponding adjustment mechanisms for the deflection roller (12).
- L e e r s e i t e -- L e r s e i t e -
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833319279 DE3319279A1 (en) | 1983-05-27 | 1983-05-27 | Polishing stack for thermoplastic sheets and films of different melt viscosities |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833319279 DE3319279A1 (en) | 1983-05-27 | 1983-05-27 | Polishing stack for thermoplastic sheets and films of different melt viscosities |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3319279A1 true DE3319279A1 (en) | 1984-12-06 |
Family
ID=6200043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19833319279 Ceased DE3319279A1 (en) | 1983-05-27 | 1983-05-27 | Polishing stack for thermoplastic sheets and films of different melt viscosities |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3319279A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3719242A1 (en) * | 1987-06-06 | 1988-12-15 | Roehm Gmbh | METHOD AND DEVICE FOR PRODUCING PLASTIC FILMS |
US5204037A (en) * | 1991-01-25 | 1993-04-20 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
US5286436A (en) * | 1990-06-09 | 1994-02-15 | Rohm Gmbh Chemische Fabrik | Producing extruded solid plastic sheet and film |
DE4236948A1 (en) * | 1992-11-02 | 1994-05-05 | Hoffmann Hans Guenter | Process as well as protective and masking tape for protecting and masking the rubber sealing strips of flush-mounted vehicle windows |
EP0796716A1 (en) * | 1996-03-06 | 1997-09-24 | Idemitsu Petrochemical Co., Ltd. | A method for manufacturing thermo-plastic sheets bearing embossed patterns thereon and an apparatus therefor |
US6306327B1 (en) | 1995-11-14 | 2001-10-23 | Idemitsu Petrochemical Co., Ltd. | Producing method of a thermoplastic resin sheet and producing apparatus therefor |
FR2975339A3 (en) * | 2011-05-19 | 2012-11-23 | Mcc Extrusion | Method for marking of composite blade to provide wood-veining aspects to blade, involves exerting sufficient pressure by roller on blade for marking face of blade and for providing wood-veining aspects to blade |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE846074C (en) * | 1950-11-07 | 1952-08-07 | Dornbusch & Co | Method and device for stamping and pressing, in particular of thermoplastic material |
US2970345A (en) * | 1957-05-24 | 1961-02-07 | Du Pont | Process for embossing and venting a resin coated fabric |
US3562048A (en) * | 1967-11-15 | 1971-02-09 | Standard Products Co | Method of making an embossed laminate |
DE2852615A1 (en) * | 1978-04-20 | 1979-10-25 | Armstrong Cork Co | PROCESS FOR MANUFACTURING A DIMENSIONAL DECORATIVE FLOORING |
-
1983
- 1983-05-27 DE DE19833319279 patent/DE3319279A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE846074C (en) * | 1950-11-07 | 1952-08-07 | Dornbusch & Co | Method and device for stamping and pressing, in particular of thermoplastic material |
US2970345A (en) * | 1957-05-24 | 1961-02-07 | Du Pont | Process for embossing and venting a resin coated fabric |
US3562048A (en) * | 1967-11-15 | 1971-02-09 | Standard Products Co | Method of making an embossed laminate |
DE2852615A1 (en) * | 1978-04-20 | 1979-10-25 | Armstrong Cork Co | PROCESS FOR MANUFACTURING A DIMENSIONAL DECORATIVE FLOORING |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3719242A1 (en) * | 1987-06-06 | 1988-12-15 | Roehm Gmbh | METHOD AND DEVICE FOR PRODUCING PLASTIC FILMS |
US4859392A (en) * | 1987-06-06 | 1989-08-22 | Rohm Gmbh Chemische Fabrik | Process and device for the production of plastic films |
US5286436A (en) * | 1990-06-09 | 1994-02-15 | Rohm Gmbh Chemische Fabrik | Producing extruded solid plastic sheet and film |
US5204037A (en) * | 1991-01-25 | 1993-04-20 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
DE4236948A1 (en) * | 1992-11-02 | 1994-05-05 | Hoffmann Hans Guenter | Process as well as protective and masking tape for protecting and masking the rubber sealing strips of flush-mounted vehicle windows |
US6306327B1 (en) | 1995-11-14 | 2001-10-23 | Idemitsu Petrochemical Co., Ltd. | Producing method of a thermoplastic resin sheet and producing apparatus therefor |
US6756002B2 (en) | 1995-11-14 | 2004-06-29 | Idemitsu Petrochemical Co., Ltd. | Producing method of a thermoplastic resin sheet and producing apparatus thereof |
EP0796716A1 (en) * | 1996-03-06 | 1997-09-24 | Idemitsu Petrochemical Co., Ltd. | A method for manufacturing thermo-plastic sheets bearing embossed patterns thereon and an apparatus therefor |
AU724643B2 (en) * | 1996-03-06 | 2000-09-28 | Idemitsu Petrochemical Co., Ltd. | A method for manufacturing thermo-plastic sheets bearing embossed patterns thereon and an apparatus therefor |
AU724643C (en) * | 1996-03-06 | 2002-06-06 | Idemitsu Petrochemical Co., Ltd. | A method for manufacturing thermo-plastic sheets bearing embossed patterns thereon and an apparatus therefor |
FR2975339A3 (en) * | 2011-05-19 | 2012-11-23 | Mcc Extrusion | Method for marking of composite blade to provide wood-veining aspects to blade, involves exerting sufficient pressure by roller on blade for marking face of blade and for providing wood-veining aspects to blade |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8125 | Change of the main classification |
Ipc: B29C 59/00 |
|
8131 | Rejection |