DE2727701C2 - Method for producing an insulating element - Google Patents
Method for producing an insulating elementInfo
- Publication number
- DE2727701C2 DE2727701C2 DE2727701A DE2727701A DE2727701C2 DE 2727701 C2 DE2727701 C2 DE 2727701C2 DE 2727701 A DE2727701 A DE 2727701A DE 2727701 A DE2727701 A DE 2727701A DE 2727701 C2 DE2727701 C2 DE 2727701C2
- Authority
- DE
- Germany
- Prior art keywords
- fiber fleece
- heating
- press
- heated press
- insulating element
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/62—Apparatus for specific applications
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/08—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means for dielectric heating
-
- 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
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/52—Heating or cooling
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
-
- 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
- B29K2313/00—Use of textile products or fabrics as reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3011—Roof linings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Laminated Bodies (AREA)
- Nonwoven Fabrics (AREA)
Description
3030th
Die Erfindung richtet sich auf ein Verfahren zum Herstellen eines Dämmelements aus einem eingebrachte, aushärtbare Bindeharze aufweisenden Faservlies und außenseitig aufgelegtem Bezugsmateriai, bei dem das Bezugsmaterial und das Faservlies in eine geheizte Presse eingebracht, dort geformt, das Faservlies bis zum Erweichen sowie Aushärten der Bindeharze erwärmt und die Verbindung zwischen dem Bezugsmaterial und dem Faservlies hergestellt wird.The invention is directed to a method for producing an insulating element from an introduced, nonwoven fabric containing curable binding resins and cover material placed on the outside, in which the Cover material and the fiber fleece placed in a heated press, formed there, the fiber fleece up to Softening as well as hardening of the binding resins is heated and the connection between the cover material and the nonwoven fabric is produced.
Ein derartiges Verfahren ist bekannt.Such a method is known.
Es ist schwierig optimale Ergebnisse hinsichtlich der Qualität eines Dämmelements zu erzielen, denn für eine gute Aushärtung der Bindeharze ist es erforderlich, über längere Zeit im Grenzbereich beginnender Pyrolyse zu arbeiten. Geringe Überschreitungen dieses Grenzbereichs, der seinerseits wieder von der jeweiligen Feuchte des Faservlieses abhängig ist, führen zur Zerstörung des Dämmelements. Die Überwachung des Feuchtigkeitsgehalts ist umständlich und erfordert qualifizierte Personen. Die bekannte Verfahrensweise ist daher verhältnismäßig aufwendig, schwierig und letztlich zur Herstellung eines einwandfreien Dämmelements unzureichend.It is difficult to achieve optimal results in terms of the quality of an insulation element than it is for a Good curing of the binding resins, it is necessary to allow pyrolysis to begin in the border area over a long period of time work. Slight exceedance of this limit area, which in turn depends on the respective Moisture of the fiber fleece is dependent, lead to the destruction of the insulation element. Monitoring the Moisture content is cumbersome and requires skilled people. The known procedure is therefore relatively expensive, difficult and ultimately for the production of a perfect insulating element insufficient.
Weiterhin ist eine Vorrichtung bekannt (GB-PS 5 77 474), mit der thermoplastisches oder warmhärtendes Isoliermaterial Druck ausgesetzt wird, während es im Inneren mittels Hochfrequenz erwärmt wird. Dieses dient dem Zweck, das Material zu formen oder zu prägen oder es mit einem anderen Material ähnlicher oder unterschiedlicher Art zu verbinden. Um einen geringen Wärmefluß aus dem behandelten Material zur Elektrode herbeizuführen, ist die Stirnfläche der Elektroden aus einem Polyvinylidenchlorid geringer Wärmeleitfähigkeit gebildet, das zugleich einen hohen h5 dielektrischen Verlustfaktor aufweist. Aufgrund des hohen Verlustfaktors wird Wärme in der Stirnfläche erzeugt, und auch dadurch wird der Wärmefluß verringertFurthermore, a device is known (GB-PS 5 77 474) with which thermoplastic or thermosetting insulating material is exposed to pressure while it is heated inside by means of high frequency. The purpose of this is to shape or emboss the material or to combine it with another material of a similar or different type. In order to bring about a low heat flow from the treated material to the electrode, the end face of the electrodes is made of a polyvinylidene chloride of low thermal conductivity, which at the same time has a high h5 dielectric loss factor. Due to the high dissipation factor, heat is generated in the end face, and this also reduces the heat flow
Der Erfindung liegt die Aufgabe zugrunde, ein einfaches, wenig Kontrollaufwand erforderndes Herstellungsverfahren der gattungsgemäßen Art zu entwikkeln, das eine wirtschaftlichere Produktion einwandfreier Dämmelemente ermöglichtThe invention is based on the object of a simple manufacturing process requiring little control effort of the generic type to develop, which enables a more economical production of flawless insulation elements
Dies wird erfindungsgemäß dadurch erreich:, daß das Erwärmen- des Faservlieses zusätzlich zur Erwärmung in dar beheizten Presse durch ein Hochfrequenzfeld vorgenommen wird.This is achieved according to the invention in that the Heating of the fiber fleece in addition to the heating in the heated press by a high-frequency field is made.
Damit ist es möglich, die Erwärmung im Inneren des Dämmelements unabhängig von der außenseitigen Erwärmung auszuführen, womit die jeweils günstigsten Temperaturverhältnisse im Querschnitt des Dämmelements entstehen. Dadurch ist auch der Zeitaufwand für das Aushärten der Bindeharze wesentlich erniedrigt und liegt in der Größenordnung von 30 Sekunden. Dadurch können über das Hochfrequenzfeld auch höhere Temperaturen, von z. B. 240°, zur Anwendung gebracht werden, denn wegen der äußerst kurzen Einwirkzeit üben sie keinen schädigenden Einfluß auf das Faservlies aus. Die außenseitige Erwärmung durch die Presse kann auf eine.™ niedrigen Wert gehalten werden, der eine Beschädigung des Faservlieses mit Sicherheit ausschließt Die Aushärtung der Bindeharze und die Formung des Faservlieses sind dadurch optimal ausführbar.This makes it possible to reduce the temperature inside the Execute the insulation element independently of the external heating, which is the cheapest in each case Temperature conditions arise in the cross-section of the insulation element. This also reduces the time required for the hardening of the binding resins is significantly reduced and is of the order of 30 seconds. Through this can use the high-frequency field also higher temperatures, from z. B. 240 °, applied because of the extremely short exposure time, they have no damaging influence on the nonwoven fabric the end. The external heating by the press can be kept to a. ™ low value, the one Damage to the fiber fleece with certainty excludes the hardening of the binding resins and the Forming of the fiber fleece can be carried out optimally.
Ein weiterer Vorteil des erfindungsgemäßen Verfahrens liegt darin, daß man als Bezugsmaterial auch PVC-Material oder einen aus einer Folie und Polyurethanschaum bestehenden Werkstoff einsetzen kann. Abgesehen von seiner Preiswertigkeit hat dieses Material den Vorteil, sich leicht abwaschen zu lassen, was bei der Anwendung dieser Dämmelemente im Automobilbau von besonderer Bedeutung ist. Wegen der kurzen Herstellungszeit ist eine wesentlich wirtschaftlichere Herstellung mit dem erfindungsgemäßen Verfahren möglich.Another advantage of the method according to the invention is that it can also be used as a reference material PVC material or a material consisting of a film and polyurethane foam can be used. Apart from its value for money, this material has the advantage of being easy to wash off, which is of particular importance when using these insulation elements in automotive engineering. Because the short production time is a much more economical production with the inventive Procedure possible.
Das erfindungsgemäße Verfahren kann in zwei Varianten zur Anwendung gebracht werden. Vorteilhaft ist es, die Patrize und Matrize tier Presse selbst als Elektrode eines Hochfrequenzgenerators auszubilden. Dadurch kommt die äußere Erwärmung durch Wärmeübertragung und die innere Erwärmung durch das Hochfrequenzfeld mit dem gleichen Werkzeug zustande, wobei diese beiden Erwärmungsarten gleichzeitig oder in einer sinnvoll programmierten Aufeinanderfolge angewandt werden können. Verlahrensmäßig wird die Hochfrequenzerwärmung des Faservlieses in der geheizten Presse durchgeführt.The method according to the invention can be used in two variants. Advantageous is to press the male and female molds themselves as Form electrode of a high frequency generator. As a result, the external heating comes from heat transfer and the internal warming caused by the high frequency field with the same tool, these two types of heating simultaneously or in a meaningfully programmed sequence can be applied. The high frequency heating of the fiber fleece in the heated press carried out.
Eine andere Möglichkeit des erfindungsgemäßen Verfahrens besteht darin, die Hochfrequenzerwärmung des Faservlieses vor der Erwärmung in der geheizten Presse durchzuführen. Hier erfolgt eine Wärmevorbehandlung zunächst außerhalb der Presse und das vorbehandelte erwärmte Faservlies wird in der Presse abschließend einer Wärme- und Druckbehandlung unterzogen.Another possibility of the method according to the invention is to use high-frequency heating to carry out the fiber fleece before heating in the heated press. Heat pre-treatment takes place here first outside the press and the pretreated heated fiber fleece is in the press finally subjected to a heat and pressure treatment.
In den Zeichnungen ist die Erfindung in einem Ausführungsbeispiel dargestellt, und zwar zeigtIn the drawings, the invention is shown in one embodiment, namely shows
F i g. 1 eine Presse zur Herstellung eines Dämmelements unter zusätzlicher Verwendung eines Hochfrequenzfelds, F i g. 1 a press for producing an insulating element with the additional use of a high-frequency field,
Fig. 2 eine Presse zur Erzeugung eines Dämmelements mit außerhalb der Presse wirksamem Hochfrequenzfeld, und2 shows a press for producing an insulating element with a high-frequency field effective outside the press, and
Fig. 3 ein nach dem erfindungsgemäßen Verfahren hergestelltes Dämmelement.3 shows an insulating element produced by the method according to the invention.
Gemäß F i g. 1 besteht die Presse 16 aus einer Patrize 12 und einer Matrize 13, die zur Herstellung von Dämmelementen 15 gemäß Fig.3 dienen. In der Matrize 13 von F i g. 1 ist das unverfestigte Faservlies 14 angeordnet. Zwischen der Matrize 13 und der Patrize 12 liegt das unterseitig mit Klebstoff 11 versehene Bezugsmaterial 10, was aus PVC bestehen kann. Die Matrize 13 und die Patrize 12 sind zugleich als Elektroden zur Erzeugung des Hochfrequenzfe'des ausgebildet i:nd zu diesem Zweck über Leitungen 18,18' mit einem Hochfrequenzgenerator 19 verbunden.According to FIG. 1, the press 16 consists of a male mold 12 and a female mold 13, which are used to produce Serving insulation elements 15 according to Figure 3. In the die 13 of FIG. 1 is the unconsolidated fiber fleece 14 arranged. Between the female part 13 and the male part 12 lies the cover material 10 provided with adhesive 11 on the underside, which can consist of PVC. the The die 13 and the male die 12 are also used as electrodes for generating the high-frequency field formed i: nd for this purpose via lines 18,18 ' connected to a high frequency generator 19.
Im Falle der F i g. 2 sind die das Hochfrequenzfeld erzeugenden Elektroden 20, 21 außerhalb der eigentlichen Presse angeordnet In einer ersten Arbeitsphase erfolgt die Erwärmung des in einer beweglichen Matrize 13 befindlichen Faservlieses 14 durch ein Hochfrequenzfeld. Danach wird die Matrize 13 mit dem vorgewärmten Faservlies 14 über eine Transporteinrichtung, z. B. die gezeigte Rollenbahn 22, in den Bereich der Presse gebracht, wo über die Patrize 12 die ergänzende außenseitige Erwärmung des Faservlieses 14 durchgeführt wird.In the case of FIG. 2, the electrodes 20, 21 generating the high-frequency field are outside the actual electrodes Press arranged In a first working phase, the heating takes place in a movable die 13 located fiber fleece 14 by a high frequency field. Then the die 13 is preheated with the Nonwoven fabric 14 via a transport device, e.g. B. the roller conveyor 22 shown, in the area of the press brought, where the supplementary outside heating of the fiber fleece 14 is carried out via the male mold 12 will.
Das Verfahren kann nicht nur auf geometrisch gleichmäßig gestaltete Faservliese, sondern auch auf unregelmäßig gestaltete angewendet werden, denn bei letzteren kann die Stärke des Hochfrequenzfeldes der unterschiedlichen Gestaltung bereichsweise angepaßt werden.The process can be applied not only to geometrically uniformly designed fiber fleeces, but also to irregularly shaped can be used, because with the latter the strength of the high-frequency field of the different design can be adapted in areas.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2727701A DE2727701C2 (en) | 1977-06-21 | 1977-06-21 | Method for producing an insulating element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2727701A DE2727701C2 (en) | 1977-06-21 | 1977-06-21 | Method for producing an insulating element |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2727701A1 DE2727701A1 (en) | 1979-01-04 |
DE2727701C2 true DE2727701C2 (en) | 1984-04-05 |
Family
ID=6011907
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2727701A Expired DE2727701C2 (en) | 1977-06-21 | 1977-06-21 | Method for producing an insulating element |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2727701C2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3203132C1 (en) * | 1982-01-30 | 1983-08-04 | Sicowa Verfahrenstechnik für Baustoffe GmbH & Co KG, 5100 Aachen | Capacitive heating device |
DE3742835C1 (en) * | 1987-12-17 | 1989-02-23 | Basf Ag | Process for the discontinuous production of moldings from plastics reinforced with fiber material |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB577474A (en) * | 1944-04-22 | 1946-05-20 | British Insulated Cables Ltd | Improvements relating to apparatus for heating insulating material by subjecting it to a high frequency field of electric force |
DE2143380B2 (en) * | 1971-08-26 | 1976-12-30 | Ted Bildplatten Ag Aeg-Telefunken-Teldec, Zug (Schweiz) | METHOD AND DEVICE FOR EMBOSSING OR PRESSING AN INFORMATION CARRIER TO BE PROVIDED WITH SIGNAL RECORDS |
-
1977
- 1977-06-21 DE DE2727701A patent/DE2727701C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2727701A1 (en) | 1979-01-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAP | Request for examination filed | ||
OD | Request for examination | ||
OI | Miscellaneous see part 1 | ||
8125 | Change of the main classification |
Ipc: B32B 1/00 |
|
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8330 | Complete renunciation |