DE19734006C1 - Process for producing multiaxially and differently deformed, fabric-reinforced, large-area structures, in particular bellows made of flat fabric-reinforced material with a coating of rubber or thermoplastic elastomers - Google Patents
Process for producing multiaxially and differently deformed, fabric-reinforced, large-area structures, in particular bellows made of flat fabric-reinforced material with a coating of rubber or thermoplastic elastomersInfo
- Publication number
- DE19734006C1 DE19734006C1 DE1997134006 DE19734006A DE19734006C1 DE 19734006 C1 DE19734006 C1 DE 19734006C1 DE 1997134006 DE1997134006 DE 1997134006 DE 19734006 A DE19734006 A DE 19734006A DE 19734006 C1 DE19734006 C1 DE 19734006C1
- Authority
- DE
- Germany
- Prior art keywords
- fabric
- reinforced
- rubber
- thermoplastic elastomers
- coating
- 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 - Fee Related
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
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/006—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor the force created by the liberation of the internal stresses being used for compression moulding or for pressing preformed material
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
- Treatment Of Fiber Materials (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung mehraxial und unterschiedlich stark verformter, gewebearmierter, großflächiger Gebilde insbesondere Faltenbälge aus ebenem gewebearmiertem Material mit Beschichtung aus Gummi oder thermoplastischen Elastomeren.The invention relates to a Process for producing multi-axially and differently deformed, fabric-reinforced, large-area structures, in particular bellows flat fabric-reinforced material with rubber or coating thermoplastic elastomers.
In der Elastomerverarbeitung (Gummi-Industrie) werden gewebeverstärkte
Flächengebilde größeren Ausmaßes, soweit sie in ihrer Gestalt, wie beispielsweise
Faltenbälge, von ebenen Bahnen abweichen, bisher ausschließlich nach
fügetechnischen Verfahren hergestellt, weil
eine direkte Formgebung über das Formpreßverfahren zu hohe, bei üblichen
Seriengrößen nicht vertretbare Werkzeugkosten verursachen würde und
das bei vollsynthetischen Faserwerkstoffen im Temperaturbereich der Verarbeitung
(Vulkanisation) auftretende Thermoschrumpfverhalten einen zusätzlichen
Kostenaufwand für die notwendige Fixierung der mit Gummi oder
thermoplastischen Elastomeren beschichtete Gewebefäden erforderlich machen
würde.In elastomer processing (rubber industry), fabric-reinforced fabrics of a larger size, as far as their shape, such as bellows, deviate from flat sheets, have so far been produced exclusively by joining techniques because
a direct shaping via the compression molding process would cause tool costs that are too high for standard sizes and would not be justifiable and
the thermoshrink behavior that occurs with fully synthetic fiber materials in the temperature range of processing (vulcanization) would make additional costs necessary for the necessary fixation of the fabric threads coated with rubber or thermoplastic elastomers.
Dabei werden die erforderlichen Verformungen durch Zuschnitt entsprechender ebener Flächen erzielt, die dann fügetechnisch zusammengesetzt werden, wobei gleichzeitig Verstärkungsrippen vorzugsweise aus Metall eingebettet werden können. Eine Kombination von Näh- und Klebeverfahren ist üblich.The required deformations are cut accordingly by cutting level surfaces achieved, which are then assembled by joining, whereby reinforcing ribs are preferably embedded at the same time made of metal can. A combination of sewing and gluing processes is common.
Dieses Verfahren hat folgende Nachteile:
Hoher Aufwand an manueller Arbeit,
Versteifung des Bereichs der Naht- und Klebestellen, die bei Dehnung
Spannungsspitzen verursacht, die Fügestelle besonders belastet und deren
Lebensdauer herabsetzt,
Zzusätzlicher Aufwand an Arbeitszeit und Material bei konvex gestalteten Flächen
oder Faltenkanten, wie sie zur Vermeidung der Muldenbildung mit Ansammlung
von Niederschlagswasser bei horizontal liegenden Flächen erforderlich sind,
unnötige aber verfahrensbedingte, vorprogrammierte Zusatzspannung im
Materialquerschnitt, weil mit Null-Faltenwinkel genäht wird, im Einbauzustand
aber ein mittlerer Faltenwinkel von 30° oder mehr erforderlich ist,
annähernde Unmöglichkeit der Gestaltung eines halbkreisförmigen Querschnitts
der Faltenkanten, die Voraussetzung für eine gleichmäßige
Spannungsverteilung über den Gesamtquerschnitt ist.
This method has the following disadvantages:
A lot of manual work,
Stiffening of the area of the seams and glue points, which causes stress peaks when stretched, places particular stress on the joint and reduces its service life,
Additional expenditure in terms of working time and material in the case of convexly shaped surfaces or fold edges, as are necessary to avoid the formation of hollows with accumulation of rainwater in horizontally lying surfaces,
unnecessary but procedural, pre-programmed additional tension in the material cross-section, because sewing is carried out with zero fold angle, but an average fold angle of 30 ° or more is required when installed,
almost impossible to design a semicircular cross-section of the fold edges, which is a prerequisite for an even distribution of stress over the entire cross-section.
In der DE 38 31 996 wird die Herstellung von wärmerückstellbaren Bändern aus vernetztem Kunststoff beschrieben. Im Gegensatz dazu soll hier ein Urformgebungsverfahren beschrieben werden, das den bei normalen vollsynthetischen Fasern vorhandenen Thermoschrumpfeffekt nutzt und eine nach der Vulkanisation erforderliche fügetechnische Umformung vermeiden hilft. Eine spätere Rückverformung ist unerwünscht und nicht möglich. Zudem beschäftigt sich die Erfindung mit Flächen, die mit gummielastischem Material belegt sind; die unter thermischer Einwirkung schrumpfenden Fäden sind unvernetzt und entsprechen den in der DE 38 31 996 A1 mehrfach (1, 15; 2, 10; 3, 13) genannten, für die genannte Erfindung jedoch nicht relevanten, "hochfesten Fäden".DE 38 31 996 describes the production of heat-recoverable tapes from cross-linked plastic. In contrast to this, a primary shaping process is to be described here, which uses the thermal shrinkage effect which is present in normal fully synthetic fibers and which helps to avoid the need for technical joining after vulcanization. Later reshaping is undesirable and not possible. In addition, the invention deals with surfaces that are covered with rubber-elastic material; the threads shrinking under the action of heat are uncrosslinked and correspond to the "high-strength threads" mentioned in DE 38 31 996 A1 several times ( 1 , 15 ; 2 , 10 ; 3 , 13 ) but not relevant to the invention mentioned.
Aufgabe der Erfindung ist eine partielle bzw. differenziert intensive Nutzung des bisher allgemein bei der Herstellung von gewebearmierten Gummierzeugnissen als negative Erscheinung bewerteten Thermoschrumpfeffekts der zur Armierung verwendeten Fasern, Fäden oder Geweben.The object of the invention is a partial or differentiated intensive use of hitherto generally in the manufacture of fabric-reinforced rubber products the thermal shrinkage effect of the reinforcement rated as negative fibers, threads or fabrics used.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Eine vorteilhafte Ausgestaltung ist im Anspruch 2 be schrieben.This object is achieved by the features of patent claim 1. An advantageous one Embodiment is be in claim 2 wrote.
Das neue Verfahren vermeidet weitgehend alle Nachteile der bisher üblichen
Herstellungsmethode:
Durch die partielle bzw. differenziert intensive Nutzung des bisher negativ
bewerteten Thermoschrumpfeffekts wird eine konvexe Gestaltung der unteren
Faltenkanten ermöglicht.
Die Nutzung der Schrumpfkräfte über konturbildende Roststäbe führt zu einer
preisgünstigeren Formgebung großer Faltenflächen.
Der frei wählbare Abstand der Roststäbe ermöglicht einen dem Einbauzustand
ähnlichen Faltenwinkel und eine Reduzierung der Spannungen im Erzeugnis.
Durch die Rundung der mit dem gummierten unvulkanisierten Gewebe in Kontakt
tretenden Teile der Roststabflächen können die Faltenkanten gerundet werden,
was ebenfalls zu einer Reduzierung der Spannungen bei Beanspruchung führt.The new process largely avoids all the disadvantages of the previously customary production method:
The partial or differentiated intensive use of the previously negatively assessed thermal shrinkage effect enables a convex design of the lower fold edges.
The use of the shrinking forces via contour-forming grate bars leads to a more economical shaping of large fold areas.
The freely selectable spacing of the grate bars enables a fold angle that is similar to the installed state and a reduction in the stresses in the product.
By rounding the parts of the grate bar surfaces that come into contact with the rubberized unvulcanized fabric, the fold edges can be rounded, which also leads to a reduction in the stresses when subjected to stress.
Somit können Faltenbalgflächen wie auch andere unregelmäßig geformte Flächen wesentlich preisgünstiger und mit einer höheren Erwartung bezüglich der Lebensdauer gefertigt werden. Dazu kommt eine mögliche Verringerung der Faltenhöhe bei gleichem Nutzungsgrad, also eine Verringerung des Materialeinsatzes und der Bauhöhe.Thus, bellows surfaces as well as other irregularly shaped surfaces much cheaper and with a higher expectation regarding the Lifetime are manufactured. There is also a possible reduction in Wrinkle height with the same degree of utilization, i.e. a reduction in the Material use and the height.
Die Erfindung wird anhand eines Ausführungsbeispiels näher erläutert. Die Figur zeigt die Herstellung einer in den unteren Faltenkanten konvex gewölbten Faltenbahnfläche.The invention is based on of an embodiment explained in more detail. The figure shows the production of a convex in the lower fold edges Fold web surface.
Die beschichtete Gewebebahn (1) wird um die zur Faltenbildung erforderlichen, in zwei unterschiedlichen Höhen und in einem bestimmten Abstand vorgesehenen Roststäbe (2) und (3) straff gezogen und an den Arretierungen (4) fixiert. Dabei liegt das unvulkanisierte Vormaterial nur an den Punkten (5) der parabolisch geformten unteren Rostkante an, die die größte Entfernung zu den oberen Rostkanten (2) aufweisen. Der untere Roststab hat an seinem höchsten Punkt (6) zunächst keinen Kontakt zur Gewebebahn.The coated fabric web ( 1 ) is pulled tight around the grate bars ( 2 ) and ( 3 ) required for the formation of folds, provided at two different heights and at a certain distance, and fixed to the detents ( 4 ). The unvulcanized raw material is only in contact with the points ( 5 ) of the parabolically shaped lower grate edge, which are at the greatest distance from the upper grate edges ( 2 ). At its highest point ( 6 ), the lower grate bar initially has no contact with the fabric web.
Durch die Wahl der Abstände der Roststäbe nebeneinander und der Abstände der konturbildenden Kanten der Stäbe können Faltenhöhe und Faltenwinkel α beliebig gestaltet werden. Die Roststäbe selbst haben einen zur Aufnahme der beim Thermoschrumpf auftretenden Flächenlasten ausreichenden Querschnitt und sind in geeigneter Form an einem Gestell befestigt.By choosing the spacing of the grate bars next to each other and the spacing of the The contour-forming edges of the bars can have any fold height and fold angle α be designed. The grate bars themselves have one to hold the Thermal shrinkage occurring surface loads sufficient cross-section and are in suitable shape attached to a frame.
Das Beschichtungsmaterial wird auf dem sich verformenden Gewebe mit verformt. Bei Kautschukmischungen wird der Vulkanisationsbeginn durch handelsübliche Verzögerer so eingestellt, daß dieser zeitlich hinter der Beendigung des Schrumpfprozesses liegt.The coating material is also deformed on the deforming fabric. In the case of rubber mixtures, the start of vulcanization is made using commercially available Delayers set so that this is after the completion of the Shrinking process.
Durch eine entsprechende Gestaltung der Roststäbe können (nach Anspruch 2) vorzugsweise in der oberen Reihe (2) kraft- oder formschlüssig Verstärkungsstäbe eingebracht werden, die durch die Schrumpfkräfte während der thermischen Behandlung so stark an die Gewebebahn angepreßt werden, daß es zu einer festen Verbindung kommt.By appropriate design of the grate bars (preferably according to claim 2) reinforcement bars can be introduced in the upper row ( 2 ) in a positive or positive manner, which are so strongly pressed against the fabric web by the shrinkage forces during the thermal treatment that it forms a firm connection is coming.
Claims (2)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997134006 DE19734006C1 (en) | 1997-08-06 | 1997-08-06 | Process for producing multiaxially and differently deformed, fabric-reinforced, large-area structures, in particular bellows made of flat fabric-reinforced material with a coating of rubber or thermoplastic elastomers |
PCT/DE1998/002197 WO1999007541A2 (en) | 1997-08-06 | 1998-08-04 | Method for producing accordion structures from flat fibre-reinforced rubber or elastomer material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997134006 DE19734006C1 (en) | 1997-08-06 | 1997-08-06 | Process for producing multiaxially and differently deformed, fabric-reinforced, large-area structures, in particular bellows made of flat fabric-reinforced material with a coating of rubber or thermoplastic elastomers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19734006C1 true DE19734006C1 (en) | 1999-01-21 |
Family
ID=7838146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997134006 Expired - Fee Related DE19734006C1 (en) | 1997-08-06 | 1997-08-06 | Process for producing multiaxially and differently deformed, fabric-reinforced, large-area structures, in particular bellows made of flat fabric-reinforced material with a coating of rubber or thermoplastic elastomers |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE19734006C1 (en) |
WO (1) | WO1999007541A2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2344086A1 (en) * | 1972-09-01 | 1974-04-11 | Raychem Corp | THERMAL-RECOVERABLE, TWO-HOLLOW COMPONENT, PROCESS FOR THE MANUFACTURING AND USING THEREOF |
DE3515193A1 (en) * | 1984-05-01 | 1985-11-07 | Kimberly-Clark Corp., Neenah, Wis. | TRAINING OF ELASTIC TOWING PARTS IN DISPOSABLE CLOTHING AND OTHER OBJECTS |
DE3831996A1 (en) * | 1988-09-21 | 1990-03-29 | Kabelmetal Electro Gmbh | Process for producing bands of plastic which can recover their shape under heat |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO147406C (en) * | 1974-07-11 | 1983-04-06 | Steni As | PROCEDURE AND DEVICE FOR CONTINUOUS PREPARATION OF CORRUGATED PLATES |
US4091063A (en) * | 1974-07-11 | 1978-05-23 | Dayco Corporation | Hose construction and method of making same |
US4082831A (en) * | 1977-05-23 | 1978-04-04 | Daito Seimo Coshi Kaisha | Method of making a multi-level flower supporting net assembly |
DE7931201U1 (en) * | 1979-11-05 | 1980-03-13 | Roehm Gmbh, 6100 Darmstadt | RIGID, ONE-PIECE, BIAXIAL STRETCHED PLASTIC BODY |
EP0034453A1 (en) * | 1980-02-09 | 1981-08-26 | The British Petroleum Company p.l.c. | Process and apparatus for the manufacture of cellular composites |
GB2079663B (en) * | 1980-07-23 | 1984-10-24 | United Gas Industries Ltd | Making corrugated tubes |
DE3225369C2 (en) * | 1982-07-07 | 1985-07-18 | Möller-Werke GmbH, 4800 Bielefeld | Process for the production of bellows for slideways |
-
1997
- 1997-08-06 DE DE1997134006 patent/DE19734006C1/en not_active Expired - Fee Related
-
1998
- 1998-08-04 WO PCT/DE1998/002197 patent/WO1999007541A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2344086A1 (en) * | 1972-09-01 | 1974-04-11 | Raychem Corp | THERMAL-RECOVERABLE, TWO-HOLLOW COMPONENT, PROCESS FOR THE MANUFACTURING AND USING THEREOF |
DE3515193A1 (en) * | 1984-05-01 | 1985-11-07 | Kimberly-Clark Corp., Neenah, Wis. | TRAINING OF ELASTIC TOWING PARTS IN DISPOSABLE CLOTHING AND OTHER OBJECTS |
DE3831996A1 (en) * | 1988-09-21 | 1990-03-29 | Kabelmetal Electro Gmbh | Process for producing bands of plastic which can recover their shape under heat |
Also Published As
Publication number | Publication date |
---|---|
WO1999007541A3 (en) | 1999-04-29 |
WO1999007541A2 (en) | 1999-02-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee | ||
8370 | Indication of lapse of patent is to be deleted | ||
8339 | Ceased/non-payment of the annual fee |