DE2905701A1 - Moulding model aeroplane parts in split moulds - by placing into first split mould in succession glass fibre blank, foamed polystyrene core and glass fibre blank - Google Patents
Moulding model aeroplane parts in split moulds - by placing into first split mould in succession glass fibre blank, foamed polystyrene core and glass fibre blankInfo
- Publication number
- DE2905701A1 DE2905701A1 DE19792905701 DE2905701A DE2905701A1 DE 2905701 A1 DE2905701 A1 DE 2905701A1 DE 19792905701 DE19792905701 DE 19792905701 DE 2905701 A DE2905701 A DE 2905701A DE 2905701 A1 DE2905701 A1 DE 2905701A1
- Authority
- DE
- Germany
- Prior art keywords
- glass fibre
- foam core
- epoxy resin
- cut
- polystyrene foam
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H27/00—Toy aircraft; Other flying toys
- A63H27/02—Model aircraft
-
- 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
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
- B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
-
- 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
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
-
- 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
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Toys (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen vonThe invention relates to a method for producing
Modellflugzeugteilen.Model airplane parts.
Es ist bekannt, Modellflugzeugteile in der Weise herzustellen, daß ein entsprechend geformter Schaumstoffkern allseits mit Hilfe eines normalen Klebers mit einer Balsaholz-Folie beklebt wird, die dann noch lackiert werden muß, damit die nötige Glätte und Wasserfestigkeit erreicht wird.It is known to manufacture model airplane parts in such a way that a correspondingly shaped foam core on all sides with the help of a normal adhesive is covered with a balsa wood foil, which then still has to be varnished so the necessary smoothness and water resistance is achieved.
Dieses Herstellverfahren hat den Nachteil, daß es die Verwendung des teuren Balsaholzes b erfordert und einer Endlackierung und Nachbearbeitung bedarf. Außerdem besteht der Nachteil, daß nach längerer Standzeit das Balsaijolzfurnier durch unterschiedliche Feuchtigkeitsaufnahme zu einer gewissen Verwindung des Bauteils führt.This manufacturing process has the disadvantage that it requires the use of the expensive balsa wood and requires a final painting and finishing. There is also the disadvantage that the balsai wood veneer after a long period of time due to different moisture absorption to a certain twisting of the component leads.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Herstellen von Modellflugzeugteilen vorzuschlagen, das bei gleichem Gesamtgewicht durch Verwendung entsprechend billigerer Baumaterialien zu einem geringeren Gestehungspreis führt, eine größere Verwindungsfestigkeit und bessere Oberflächenglätte ergibt. Dies soll ohne gesonderte Endlackerung und Nacharbeitung erreicht werden.The invention is based on the object of a method for manufacturing of model airplane parts to propose that with the same total weight by using correspondingly cheaper building materials leads to a lower cost price, results in greater torsional strength and better surface smoothness. This is supposed to can be achieved without separate final painting and reworking.
Gelöst wird diese Aufgabe nach der Erfindung durch Einlegen einer dem Umriß des Flugzeugteils entsprechend zurechtgeschnittenen Glasfasergewebematte in ein unteres Formteil, Bepinseln und Tränken der Glasfasereewebematte mit einem Epoxydharz-Zwei-Komponentenkleber, Auflegen eines entsprechend der Form des Flugzeugteils zurechtgeschnittenen Polystyrol-Schaumstoffkerns, Auflegen einer weiteren, dem Umriß des Flugzeugteils entsprechend zurechtgeschnittenen Glasfasergewebematte, erneutes Bepinsoln und Tränken der zweiten aufgelegten Glasfasergewebematte mit einem Epoxydharz-Zwei-Komponentenkleber, Aufsetzen des oberen Formteils bei Aufrechterhaltung eines Abstandes zwischen beiden Formteilhälften von etwa 1 mm, Verspannen der Formteile bis zur gegenseitigen Anlage und etwa 24-stündige Lagerung in verspanntem Zustand der Formteile bei normaler Raumtemperatur.This object is achieved according to the invention by inserting a Glass fiber fabric mat cut to size to match the outline of the aircraft part into a bottom molding, brushing and soaking the fiberglass tissue mat with one Epoxy resin two-component adhesive, applying one according to the shape of the aircraft part Cut to size polystyrene foam core, placing another, the outline of the aircraft part accordingly cut glass fiber fabric mat, again Bepinsoln and soaking the second placed glass fiber fabric mat with an epoxy resin two-component adhesive, Put on the upper molding while maintaining a distance between the two Molded part halves of about 1 mm, tensioning of the molded parts up to mutual contact and about 24 hours of storage in the clamped state of the molded parts at normal Room temperature.
Zweckmäßig werden die Formteile vor ihrer Verwendung noch zusätzlich dünn mit Epoxydharz-Zwei-Komponentenkleber bepi nselt.The molded parts are also expediently additionally before they are used Thinly brushed with epoxy resin two-component adhesive.
imine besondere Oberflächenglätte kann dadurch erzielt werden, daP zwischen dem Polystyrol-Schaumstoffkern und den Glasfasergewebematten eine zurechtgeschnittene Seidenpapierbahn eingelegt wird.A special surface smoothness can be achieved by daP a cut to size between the polystyrene foam core and the fiberglass fabric mats Tissue paper web is inserted.
Vorteilhaft wird eine einheitliche, um den Polystyrol-Schaumstoffkern herumgeklappte Glasfasergewebematte verwendet.A uniform to the polystyrene foam core is advantageous Folded fiberglass mat used.
Der benötigte Piystyrol-Schaumstoffkern läßt sich sehr leicht und einfach aus einem Schaumstoffblock mittels eines Glühdrahtes llerausschnelden.The required piystyrene foam core can be very easily and simply cut it out of a foam block using a filament.
Ein nach obigem Verfahren hergestelltes Modellflugzeug-Bauteil umfaßt : somit eine Außenhaut aus mit einem Epoxydharz-Zwei-Komponentenkleber getränkter Glasfasergewebematte und einen durch Zusammenpressen unter Vorspannung stehend mit der Außenhaut verklebten Polystyrol-Schaumstoffkern.A model airplane component produced by the above method comprises : thus an outer skin made of impregnated with a two-component epoxy resin adhesive Glass fiber fabric mat and one by being compressed under pretension with Polystyrene foam core glued to the outer skin.
Bei einer bevorzugten Ausführungsform ist zwischen dem Schaumstoffkern und der Außenhaut eine Einlage aus einer zurechtgeschnittenen Seidenpapierbahn vorhanden.In a preferred embodiment there is between the foam core and the outer skin is provided with an insert made of a cut tissue paper web.
Nachfolgend wird anhand der Zeichnung ein Ausführungsbeispiel eines derartigen ModeLlflugzeug-Bauteils näher erläutert 15 zeigen ligur 1 : ein ESodellfiugzeug-Bauteil in Form eines Flügels in Schrägansicht gesehen und stark verkleinert, jur 2 : einen Querschnitt durch den Gegenstand nach Figur 1 entlang Schnittlinie 1I-II.An exemplary embodiment of a such model aircraft component explained in more detail 15 show ligur 1: an e-model aircraft component in the form of a wing seen at an angle and greatly reduced, jur 2: one Cross section through the object according to Figure 1 along section line 1I-II.
Der in Figur 1 in Schrägansicht gezeigte Flugzeugflügel 1 besitzt die übliche langgestreckte, beidseitig ausgebaucllte Form.The aircraft wing 1 shown in an oblique view in FIG the usual elongated shape, expanded on both sides.
Die 'tuerschnittsdarstellung gemätY Figur 2 läßt den besonderen Aufbau des Flugzeugbauteils erkennen. Der Polystyrol-Schaumstoffkern 2 wird allseits durch cie Außenhaut in Fonn der Glasfasergewobematte 3 umschlossen, welche durch einen Epoxydharz-Zwei-Komponentenkl eber 4 an den Schaumstoffkern 2 angeklebt worden ist.The 'cross-section representation according to Figure 2 leaves the special structure of the aircraft component. The polystyrene foam core 2 is through on all sides cie outer skin in the form of the fiberglass mat 3 enclosed, which by a Epoxy resin two-component adhesive 4 has been glued to the foam core 2.
Die innige, bleibende Verbindung der genannten Teile wird in einerin der Zeichnung nicht dargestel:'ten üblichen zweiteiligen Form bewerkstelligt, in welcher das Bauteil unter geringer Vorspannung etwa 24 Stunden lang verweilt. Nach Herausnahme des fertigen Modellflugzeugteils aus der zweiteiligen Form besitzt dieses eine glatte Oberfläche, die keinerlei Nachlackierung oder Nachbearbeitung mehr bedarf. Das so heErestellte Modellflugzeugteil bleibt während der gesamten Gebrauchszeit absolut verwindungsfrei, da jegliche Wasseraufnahme ausgeschlossen wird.The intimate, lasting connection of the parts mentioned is in one of the drawing not shown: 'ten customary two-part form accomplished in which the component remains under low pretension for about 24 hours. To Removal of the finished model airplane part from the two-part form has this a smooth surface that does not require any further painting or finishing. The model airplane part that has been restored in this way remains during the entire period of use absolutely torsion-free, as any water absorption is excluded.
Wegen der Verwendung besonders kostengünstiger Materialien ist der gesamte Gestehungspreis verglichen mit bekannten Herstellungsverfahren stark herabgesetzt.Because of the use of particularly inexpensive materials, the total cost price greatly reduced compared to known manufacturing processes.
L e e r s e i t eL e r s e i t e
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792905701 DE2905701A1 (en) | 1979-02-15 | 1979-02-15 | Moulding model aeroplane parts in split moulds - by placing into first split mould in succession glass fibre blank, foamed polystyrene core and glass fibre blank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792905701 DE2905701A1 (en) | 1979-02-15 | 1979-02-15 | Moulding model aeroplane parts in split moulds - by placing into first split mould in succession glass fibre blank, foamed polystyrene core and glass fibre blank |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2905701A1 true DE2905701A1 (en) | 1980-08-28 |
Family
ID=6062942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19792905701 Withdrawn DE2905701A1 (en) | 1979-02-15 | 1979-02-15 | Moulding model aeroplane parts in split moulds - by placing into first split mould in succession glass fibre blank, foamed polystyrene core and glass fibre blank |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2905701A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3537840A1 (en) * | 1984-10-26 | 1986-04-30 | Hans Ing.(Grad.) 7321 Aichelberg Germar | Process for producing mouldings from plastic and sandwich construction element produced according to this process |
DE3924990A1 (en) * | 1989-06-13 | 1991-02-14 | Man Technologie Gmbh | Hip joint prosthesis shank |
WO2000009315A1 (en) * | 1998-08-15 | 2000-02-24 | Bae Systems Plc | A method of constructing skin for a member of a body such as an aircraft |
-
1979
- 1979-02-15 DE DE19792905701 patent/DE2905701A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3537840A1 (en) * | 1984-10-26 | 1986-04-30 | Hans Ing.(Grad.) 7321 Aichelberg Germar | Process for producing mouldings from plastic and sandwich construction element produced according to this process |
DE3924990A1 (en) * | 1989-06-13 | 1991-02-14 | Man Technologie Gmbh | Hip joint prosthesis shank |
WO2000009315A1 (en) * | 1998-08-15 | 2000-02-24 | Bae Systems Plc | A method of constructing skin for a member of a body such as an aircraft |
US6669806B1 (en) | 1998-08-15 | 2003-12-30 | Bae Systems Plc | Method of constructing skin for a member of a body such as an aircraft |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |