DE202005005475U1 - Thermoformable sandwich composite workpiece for molding three-dimensional products comprises core, fiber reinforced resin and film facing layers enclosed in porous evacuation layers and covering films - Google Patents
Thermoformable sandwich composite workpiece for molding three-dimensional products comprises core, fiber reinforced resin and film facing layers enclosed in porous evacuation layers and covering films Download PDFInfo
- Publication number
- DE202005005475U1 DE202005005475U1 DE200520005475 DE202005005475U DE202005005475U1 DE 202005005475 U1 DE202005005475 U1 DE 202005005475U1 DE 200520005475 DE200520005475 DE 200520005475 DE 202005005475 U DE202005005475 U DE 202005005475U DE 202005005475 U1 DE202005005475 U1 DE 202005005475U1
- Authority
- DE
- Germany
- Prior art keywords
- layers
- sandwich
- workpiece
- evacuation
- mold
- 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 - Lifetime
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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
-
- 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
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
- B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding 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
- 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
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/28—Component parts, details or accessories; Auxiliary operations for applying pressure through the wall of an inflated bag or diaphragm
-
- 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
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- 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
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
- B29C2043/3644—Vacuum bags; Details thereof, e.g. fixing or clamping
-
- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung betrifft ein Werkstück und Vorrichtung zur Schaffung dieses mit den Merkmalen des Oberbegriffs des Haupanspruches und eine Vorrichtung zur Durchführung des Verfahrens.The Invention relates to a workpiece and device for providing this with the features of the preamble of the main claim and an apparatus for carrying out the Process.
Zur Formung von Verbundwerkstoffen (Sandwiches oder Composites) ist das Sandwichtiefziehverfahren konzipiert. Es ermöglicht die Formung in einem Schritt.to Forming of composite materials (sandwiches or composites) is designed the sandwich gravure process. It allows shaping in one Step.
Die Verarbeitung von Verbundwerkstoffen auf Basis von Reaktionsharzen als Matrix und einem Strukturwerkstoff ist seit den 50er Jahres des 20. Jahrhunderts bekannt. Es wird ein Strukturwerkstoff mit einem Reaktionsharz gefüllt und gehärtet. Der dabei entstehende Verbundwerkstoff verbindet dabei die Materialeigenschaften beider Werkstoffe. Als Struktur aufweisen, meistens in Faserform. Es werden im Folgenden nur Faserwerkstoffe betrachtet. Die Matrix übernimmt in diesem Verbundwerkstoff die Funktion der Verbindung der Fasern in bringt ihre mechanischen Eigenschaften in den Verbundwerkstoff mit ein. Oft erfüllt die Matrix die Funktion, die Zähigkeit des Verbundwerkstoffs zu erhöhen.The Processing of composites based on reactive resins as a matrix and a structural material since the 50s known in the 20th century. It will be a structural material with filled a reaction resin and hardened. The resulting composite material combines the material properties both materials. To have a structure, mostly in fiber form. Only fiber materials will be considered below. The matrix takes over in this composite the function of connecting the fibers in brings with it its mechanical properties in the composite material one. Often fulfilled the matrix the function, the toughness of the composite material.
Zur Herstellung von Bauteilen aus Verbundwerkstoffen wird der Werkstoff in Lagen in eine Form aufgetragen. Dafür gibt es mehrere Möglichkeiten. Die einfachste ist, die Lagen per Hand aufzutragen und mit einer Rollen aneinanderzudrücken und Lufteinschlüsse zu entfernen.to Production of components made of composite materials is the material applied in layers in a mold. There are several possibilities for that. The The easiest way is to apply the layers by hand and with a roller another push and air pockets to remove.
Des weiteren kann der Aufbau mit einem Folien-/ Vließaufbau vakuumdicht verschlossen werden. Bei Anlegen eines Vakuums werden die Bedingungen des Zusammenpressens und des Evakuieren erfüllt.Of Furthermore, the structure can be vacuum-tightly closed with a film / non-woven construction become. Upon application of a vacuum, the conditions of compression and evacuating.
Industrielle Anwendung finden aber eher Verfahren mit Formen bestehend aus Matrize und Patritze, bei denen in einer Presse der nötige Anpressdruck erzeugt wird. Gerade für großvolumige Bauteile stellt die Autoklaventechnik ein gängiges Verfahren dar, bei dem der Aufbau in einem Druckkessel zusätzlich zum Vakuum mit einem äußeren Druck beaufschlagt wird.industrial However, methods with forms consisting of matrix are more likely to be used and Patritze, where in a press the necessary contact pressure is generated. Especially for large volume components Autoclave technology is a common method in which the construction in a pressure vessel in addition to the vacuum with an external pressure is charged.
All diese Verfahren erfüllen jedoch nicht alle Anwendungsmöglichkeiten, die mit Faserverbunden gelöst werden können. So stellt man bei einer monetären Betrachtung fest, das alle Handlaminierverfahren zwar geringe Investitionen bedürfen, aber hohen Personalaufwand erfordern. Außerdem müssen viele und teure Einwegmaterialien verwendet werden, um ein flächiges Anliegen des Vakuums und eine Trennung des Harzes von dem Vakuumaufbau zu gewährleisten.Alles comply with these procedures but not all applications, solved with fiber composites can be. So you put in a monetary Considering that all hand laminating while low investment require, but require high personnel expenses. In addition, many and expensive disposable materials used to be a plane Concern of the vacuum and a separation of the resin from the vacuum structure to ensure.
Maschinelle Verfahren erfordern sehr hohe Investitionen und sind unflexibel. Für spezielle Anwendungsfälle ist es immer wieder erforderlich, kleine Stückzahlen eines Bauteils herzustellen, mit einer reproduzierbaren Qualität und geringen Investitionskosten. Wenn dieses Bauteil noch durch ein einlaminiertes Kernmaterial versteift werden soll, und konturiert ist, kann keines der genannten Fertigungsverfahren angewandt werden.Machinery Procedures require very high investments and are inflexible. For special use cases it is always necessary to produce small quantities of a component, with a reproducible quality and low investment costs. If this component still stiffened by a laminated core material should be, and is contoured, none of the said manufacturing processes be applied.
Die Aufgabe besteht darin, für diesen Anwendungszweck ein Verfahren zu schaffen. Doe erfindungsgemäße Lösung besteht in dem in Anspruch 1 genannten Verfahren. Die Unteransprüche geben vorteilhafte Ausführungsformen wieder.The Task is for to create a method for this purpose. Doe solution according to the invention exists in the method mentioned in claim 1. The dependent claims give advantageous embodiments again.
Das erfindungsgemäße Sandwichtiefziehverfahren erfüllt den Qualitätsanspruch, da das Laminat – einer Tiefziehfolie gleich – per Vakuum über eine Form gezogen wird. Es ist kostengünstig, da sich der maschinelle Aufwand „in Grenzen hält".The Sandwich deep-drawing method according to the invention Fulfills the quality claim, because the laminate - a Thermoforming foil equal - per Vacuum over one Form is pulled. It is inexpensive, since the machine Effort "in Holds boundaries ".
Es kommt weiter mit sehr wenig Einwegmaterial aus und als Form ist nur eine Formhälfte erforderlich. Bei dem Sandwichtiefziehverfahren wird der Laminataufbau auf der Sicht- und der Nichtsichtseite mit einer thermoplastischen Folie ergänzt. Haftungsprobleme sind in diesem Fall nicht zu eliminieren, sie sind gewollt. Um das Laminat formen zu können, wird es zwischen zwei elastische Folien gelegt, evakuiert und wie eine Folie tiefgezogen. Alternativ kann das Laminat auch mittels Druckkammer an die Form gepresst werden.It keeps coming out with very little disposable material and as a shape only one mold half required. In the sandwich gravure process, the laminate buildup becomes on the visual and non-viewing side with a thermoplastic Slide complements. Adhesion problems are not eliminated in this case, they are wanted. To form the laminate, it is between two laid elastic films, evacuated and deep-drawn like a film. Alternatively, the laminate can also by means of pressure chamber to the mold be pressed.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgendenden näher beschrieben. Dabei zeigen:embodiments The invention are illustrated in the drawings and are in following closer described. Showing:
Das
Sandwich (
Das
Sandwich wird von einem bevorzugt sehr offenporigen Vlies
Andere dauerelastische Folien können verwendet werden, wenn z.B. die Dehnung des Silikons nicht ausreichend ist. Die Stärke der Folie beträgt im vorliegenden Fall 1 mm. Geringere Folienstärken haben den Vorteil der geringeren Rückstellkraft, die Haltbarkeit leidet. Bei stärkeren Folien verhalt es sich umgekehrt.Other permanently elastic films can used when e.g. the stretching of the silicone is not sufficient is. The strenght the film is in the present case 1 mm. Lower film thicknesses have the advantage of lower restoring force, the durability suffers. For stronger ones Slides behave the other way around.
Der
komplette Lagenaufbau ist in
Die
Form
Zum
Formen und Härten
des Sandwiches ist eine Fertigungsanlage (
Der
Spannrahmen
Die Ausführung der Dichtlippe ist variabel. Ratsam ist eine aufblasbare Silikonschlauchdichtung um ein annäherndes Vakuum zu erreichen. Der Werkzeugtisch ist vertikal beweglich 19 und taucht mit dem Werkzeug in den Spannrahmen ein. Er dichtet den Vakuumraum ab, indem er gegen den Spannrahmen gefahren wird.The execution the sealing lip is variable. Advisable is an inflatable silicone tube seal an approximate Reach vacuum. The tool table is vertically movable 19 and dives into the tenter with the tool. He seals that Vacuum space by being driven against the clamping frame.
Durch
Anlegen des Vakuums
Damit
das Sandwich sich wie eine Folie verhält, wird es vor dem Prozeß evakuiert.
Dies ist über den
Vakuumanschluß
Einige Formen sich sehr gut (das Laminat), andere kaum (der Kern, abhängig von der Dicke). Im Resultat kann es zur Faltenbildung an der Oberfläche kommen. Die richtige Einstellung muß erprobt werden. In Versuchen haben sich Absolutdrücke zwischen 0,2 und 0,9 bar als anwendbar ergeben, je nach Form und Laminataufbau.Some Form very well (the laminate), others hardly (the core, depending on the thick). As a result, wrinkles may form on the surface. The right attitude must be tested become. In tests, absolute pressures between 0.2 and 0.9 bar as applicable, depending on the shape and laminate construction.
Als
weiter wesentlich für
den Prozeß ist
die richtige Wahl der Temperaturen und der Zeiten. Die Heizkammer
Bei den bevorzugt verwendeten Materialien (ABS Folie, Epoxidharz (kalthärtend) und Airex Schaum) bewegt sich die Bandbreite der Temperaturen zum Vorheizen zwischen 130 und 180 °C für 50 bis 120 sec. Eine längere Verweildauer führt zur besseren Durchwärmung des Sandwiches, führt aber auch eher zu einem Kolabieren des Schaumkernes. Der Formofen ist weniger stark erhitzt. Hier soll die Temperatur die Reaktion des Harzes beschleunigen.In the preferred materials used (ABS film, epoxy resin (cold curing) and Airex foam), the range of temperatures for preheating between 130 and 180 ° C for 50 to 120 sec moves. A longer residence time leads to better heating of the sandwich, but also leads rather to a coling of the foam core. The forming furnace is less heated. Here is the Temperature accelerate the reaction of the resin.
Die
Wahl der richtigen Temperatur ist auch hier abhängig von dem verwendeten Harz.
Bei dem verwendeten kalthärtenden
Epoxidharz ist eine Temperatur über
90 °C nicht
empfehlenswert um Blasenbildung zu vermeiden. Je geringer die Temperatur
ist, desto länger
ist der Härtungsprozeß. Bei eingestellten
70 °C ist
das Reaktionsharz nach 90 min weitestgehend ausgehärtet und
das Bauteil (
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200520005475 DE202005005475U1 (en) | 2005-04-06 | 2005-04-06 | Thermoformable sandwich composite workpiece for molding three-dimensional products comprises core, fiber reinforced resin and film facing layers enclosed in porous evacuation layers and covering films |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200520005475 DE202005005475U1 (en) | 2005-04-06 | 2005-04-06 | Thermoformable sandwich composite workpiece for molding three-dimensional products comprises core, fiber reinforced resin and film facing layers enclosed in porous evacuation layers and covering films |
Publications (1)
Publication Number | Publication Date |
---|---|
DE202005005475U1 true DE202005005475U1 (en) | 2005-08-04 |
Family
ID=34833387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200520005475 Expired - Lifetime DE202005005475U1 (en) | 2005-04-06 | 2005-04-06 | Thermoformable sandwich composite workpiece for molding three-dimensional products comprises core, fiber reinforced resin and film facing layers enclosed in porous evacuation layers and covering films |
Country Status (1)
Country | Link |
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DE (1) | DE202005005475U1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012007160A2 (en) | 2010-07-14 | 2012-01-19 | Technische Universität München | Method for producing a component from a fibre composite, preform therefor, and component |
WO2013007385A1 (en) | 2011-07-13 | 2013-01-17 | Technische Universität München | Method for producing a component from a composite fiber material and composite fiber material component |
DE102012216582A1 (en) * | 2012-09-17 | 2014-03-20 | Gaugler & Lutz Ohg | Method for forming enclosed object from thermoplastic material by using thermoforming device utilized in e.g. industry, involves reshaping, assembling and cooling thermoplastic material or composite material, and removing object from casing |
-
2005
- 2005-04-06 DE DE200520005475 patent/DE202005005475U1/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012007160A2 (en) | 2010-07-14 | 2012-01-19 | Technische Universität München | Method for producing a component from a fibre composite, preform therefor, and component |
DE102010031886A1 (en) | 2010-07-14 | 2012-01-19 | Technische Universität München | Method for producing a component from a fiber composite material, preform therefor and component |
WO2013007385A1 (en) | 2011-07-13 | 2013-01-17 | Technische Universität München | Method for producing a component from a composite fiber material and composite fiber material component |
DE102011122233A1 (en) | 2011-07-13 | 2013-01-17 | Technische Universität München | Thermoplastic multi-material film |
DE102012216582A1 (en) * | 2012-09-17 | 2014-03-20 | Gaugler & Lutz Ohg | Method for forming enclosed object from thermoplastic material by using thermoforming device utilized in e.g. industry, involves reshaping, assembling and cooling thermoplastic material or composite material, and removing object from casing |
DE102012216582B4 (en) * | 2012-09-17 | 2021-06-10 | Gaugler & Lutz GmbH & Co. KG | Method of forming an article |
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Legal Events
Date | Code | Title | Description |
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R207 | Utility model specification |
Effective date: 20050908 |
|
R156 | Lapse of ip right after 3 years |
Effective date: 20081101 |