DE3810356C1 - Production process for an element of fibre composite plastic - Google Patents

Production process for an element of fibre composite plastic

Info

Publication number
DE3810356C1
DE3810356C1 DE3810356A DE3810356A DE3810356C1 DE 3810356 C1 DE3810356 C1 DE 3810356C1 DE 3810356 A DE3810356 A DE 3810356A DE 3810356 A DE3810356 A DE 3810356A DE 3810356 C1 DE3810356 C1 DE 3810356C1
Authority
DE
Germany
Prior art keywords
mold
parts
plastic
composite plastic
body parts
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
Application number
DE3810356A
Other languages
German (de)
Inventor
Peter 8200 Rosenheim De Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Helicopters Deutschland GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Priority to DE3810356A priority Critical patent/DE3810356C1/en
Application granted granted Critical
Publication of DE3810356C1 publication Critical patent/DE3810356C1/en
Expired legal-status Critical Current

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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/302—Details of the edges of fibre composites, e.g. edge finishing or means to avoid delamination
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

When producing an element from fibre composite plastic by means of a mould or a moulding tool with undercuts of the forming area, when shaping the element there occurs a parting, ensuring that the said element can be demoulded, by the forming of overlapped joining points of the individual element parts (1, 2) with scarfed edges, each joining point shaping the individual element parts (1, 2) one after the other according to the profile of the edge scarfing (1.1 and 2.1, respectively) and with a release film (3) interposed. This dispenses with any finishing effort without parting the mould or the moulding tool. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patent­ anspruchs 1.The invention relates to a method according to the preamble of the patent claim 1.

Voraussetzung für eine Verarbeitung von Faserverbundkunststoff auf einer Form bzw. einem Formwerkzeug mit Hinterschneidungen der Formfläche ist bisher eine zumeist mit einer beträchtlichen Steigerung der Werkzeug­ kosten verbundene Teilung derselben, um den fertigen Kunststoffkörper entformen zu können. Andernfalls muß zuvor der fertige Kunststoffkörper zerteilt werden, was einen erheblichen Nachbearbeitungsaufwand für das Vereinigen der Körpereinzelteile zur Folge hat, wenn diese nach dem Entformen stumpf zu fügen sind. Dann setzt nämlich eine sichere Kleb­ verbindung der Körpereinzelteile erfahrungsgemäß eine Laschenverklebung voraus, wobei sich Stöße und Fugen nur durch einen die Einbettung einer Verbindungslasche ermöglichenden Materialabtrag an den Rändern der beiden jeweils stumpfstoßenden Körpereinzelteile vermeiden lassen. Dagegen ist die überlappte Fügung der Körpereinzelteile durch Ineinan­ derstecken an der Trennstelle nach einem durch die DE-OS 16 29 445 bekannten Verfahren nicht ohne Erhöhung der Wandungsdicke des Körpers längs der Trennstelle möglich.Prerequisite for processing fiber composite plastic on a Form or a molding tool with undercuts of the molding surface so far mostly with a significant increase in tool cost related division of the same to the finished plastic body to be able to demold. Otherwise, the finished plastic body must first be divided, which is a considerable postprocessing effort for the Unification of the body parts entails, if these after the Demoulding are to be butted. Then there is a safe glue Experience has shown that the individual parts of the body are joined together using tabs ahead, whereby joints and joints can only be embedded by one Connection tab allows material removal at the edges of the Have both butt-jointing body parts avoided. On the other hand, the overlapping joining of the individual parts of the body is due to one another stuck at the separation point according to one of DE-OS 16 29 445 known methods not without increasing the wall thickness of the body possible along the separation point.

Der Erfindung liegt daher die Aufgabe zugrunde, bei der Anwendung eines Fertigungsverfahrens der eingangs genannten Art ohne den beschriebenen Nachbearbeitungsaufwand und Dickenänderungen der Wandung beim fertigen Kunststoffkörper auszukommen.The invention is therefore based on the object when using a Manufacturing process of the type mentioned above without the described Post-processing effort and changes in wall thickness during manufacture Plastic bodies get along.

Diese Aufgabe ist bei dem gattungsgemäßen Verfahren mit den kennzeich­ nenden Merkmalen des Patentanspruchs 1 gelöst. Demnach ist die zum Entformen unerläßliche Unterteilung des Kunststoffkörpers nicht die Folge einer Zerteilung, sondern in den Gestaltungsarbeitsablauf in einer Weise einbezogen, daß nach dem Entformen eine paßgenaue Verklebung der Körpereinzelteile mit hoher Verbindungssicherheit gewährleistet ist. Für das paßgenaue Zusammenfügen der Körpereinzelteile hat sich die im Unteranspruch 2 gekennzeichnete Maßnahme als besonders vorteilhaft erwiesen.This task is in the generic method with the characteristics ning features of claim 1 solved. Accordingly, it is for Do not demold the indispensable subdivision of the plastic body Follow a split, but in the design workflow in one Way included that after demoulding a precise fit the Body parts with high connection security is guaranteed. For the precise fitting together of the body parts has become the im Sub-claim 2 marked measure as particularly advantageous  proven.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels näher erläutert, wobei die Zeichnung in Explosionsdarstellung ein Gehäuse beispielsweise für einen Lüfter eines Ölkühlers zeigt. Das Gehäuse besteht aus faserverstärktem Kunststoff, z. B. Glasfasern in einer Kunstharzma­ trix, und kann seiner komplizierten Gestalt wegen nur im sog. Aufle­ ge- oder Laminierverfahren, also von Hand gefertigt werden. Die nicht dargestellte Form hierzu weist zwangsläufig Hinterschneidungen der Form­ fläche auf, so daß das Entformen eine Teilung des Gehäuses voraussetzt. Dies geschieht bereits bei der Gestaltung des Gehäuses, und zwar werden bei der dargestellten Teilung des Gehäuses dessen beide Einzelteile 1, 2 auf der (nicht dargestellten) Formfläche entsprechend dem Verlauf einer Randschäftung 1.1 bzw. 2.1 je Einzelteil 1, 2 nacheinander unter Zwi­ schenfügung einer Trennfolie 3 an der Fügestelle gestaltet. Der Dar­ stellung entsprechend wird demnach bei der Gestaltung zunächst das eine Einzelteil 1 am zu fügenden Rand mit von innen nach außen abnehmendem Querschnitt geschäftet und hiernach diese Randschäftung 1.1 mit der Trennfolie 3 abgedeckt, worauf erst auf der Formfläche das andere Ein­ zelteil 2 mit komplementärer Randschäftung 2.1, also mit von innen nach außen zunehmendem Querschnitt des zu fügenden Randes gestaltet wird. Die formgebende Fläche für diese zweite Randschäftung 2.1 ist dabei, unter Zwischenfügung der Trennfolie 3, die erste Randschäftung 1.1. Nach dem anschließenden gemeinsamen Aushärten der beiden Einzelteile 1, 2 bei­ spielsweise in einem Autoklaven sind sie, wie dargestellt, getrennt ent­ formbar, wobei zwangsläufig auch die Trennfolie 3 gelöst wird. Schließ­ lich braucht für die anschließende Vereinigung der Einzelteile 1, 2 zu dem Gehäuse lediglich ihren geschäfteten Rändern eine Klebmasse zwi­ schengefügt zu werden. Aus Gründen der Maßgenauigkeit der Fügung sollte diese nicht dargestellte Klebmasse, z. B. ein duromerer Folienkleber, die Dicke der Trennfolie 3 aufweisen. Deshalb wird zweckmäßig bei der Ge­ staltung der Einzelteile 1, 2 bzw. ihrer Randschäftungen 1.1 bzw. 2.1 eine solche Trennfolie 3 verwendet, deren Dicke nach der erforderlichen Schichtdicke der Klebmasse bemessen ist.The invention is explained in more detail below with the aid of an exemplary embodiment, the drawing showing an exploded view of a housing, for example for a fan of an oil cooler. The housing is made of fiber-reinforced plastic, e.g. B. glass fibers in a Kunstharzma trix, and can be made by hand because of its complicated shape because of the so-called lay-up or laminating process. The shape, not shown, inevitably has undercuts on the shape surface, so that the demolding requires a division of the housing. This is already done in the design of the housing, namely, in the division of the housing shown, its two individual parts 1, 2 on the (not shown) shaped surface corresponding to the course of an edge shaft 1.1 or 2.1 per individual part 1, 2 one after the other with the interposition of one Separating film 3 designed at the joint. The Dar position accordingly is accordingly in the design, the one part 1 on the edge to be joined with a cross-section decreasing from the inside out and then covering this edge shaft 1.1 with the separating film 3 , whereupon only on the molding surface the other one part 2 with complementary edge shaft 2.1 , that is to say with a cross section of the edge to be joined which increases from the inside out. The shaping surface for this second edge shaft 2.1 is, with the interposition of the separating film 3 , the first edge shaft 1.1 . After the subsequent common curing of the two individual parts 1, 2 in example in an autoclave, they are, as shown, separately moldable, inevitably also the release film 3 is released. Finally Lich for the subsequent union of the individual parts 1, 2 to the housing only needs their adhesive edges to be added between. For reasons of dimensional accuracy of the joining this adhesive, not shown, z. B. a thermosetting film adhesive, the thickness of the release film 3 . Therefore, such a separating film 3 is expediently used in the design of the individual parts 1, 2 or their peripheral shafts 1.1 or 2.1 , the thickness of which is dimensioned according to the required layer thickness of the adhesive.

Da das Fertigungsverfahren gemäß der Erfindung ohne jegliche Nachbear­ beitung der Einzelteile 1, 2 für deren paßgenaue Vereinigung auskommt, ist es ein wesentlicher Beitrag zur Kostenreduzierung von Kunststofform­ teilen komplizierter Gestalt.Since the manufacturing method according to the invention works without any reworking of the individual parts 1, 2 for their precisely fitting union, it is an essential contribution to reducing the cost of plastic mold parts of complicated shape.

Claims (2)

1. Verfahren zur Fertigung eines Körpers aus Faserverbundkunststoff durch Aufbringen von faserverstärktem Kunststoff auf eine Form oder ein Formwerkzeug mit Hinterschneidungen der Formfläche, Aushärten des Kunst­ stoffes, Aufteilen des Körpers in Einzelteile, Entfernen der Form oder des Formwerkzeugs und Zusammenfügen der Körpereinzelteile durch Kleben, dadurch gekennzeichnet, daß die die Entformbarkeit des Körpers sicherstellende Teilung bei dessen Gestaltung durch Ausbilden von über­ lappten Fügestellen der Körpereinzelteile (1, 2) mit geschäfteten Rändern erfolgt, wobei je Fügestelle die Körpereinzelteile (1, 2) entsprechend dem Verlauf der Randschäftung (1.1 bzw. 2.1) nacheinander und unter Zwischenfügung einer Trennfolie (3) gestaltet werden.1. A method for producing a body made of fiber composite plastic by applying fiber-reinforced plastic to a mold or a mold with undercuts in the molding surface, curing the plastic, dividing the body into individual parts, removing the mold or mold and joining the body parts by gluing, thereby in that the releasability of the body making sure the end of partition in its design by forming on lappten joints of the body parts (1, 2) takes place with geschäfteten edges, wherein each joint body parts (1, 2) corresponding to the course of the Randschäftung (1.1 or 2.1 ) one after the other and with the interposition of a separating film ( 3 ). 2. Verfahren nach Anspruch 1, gekennzeichnet durch die Verwendung einer Trennfolie (3) mit einer Dicke gleich der Schichtdicke einer zur Vereinigung der entformten Körpereinzelteile (1, 2) bestimmten Klebemasse.2. The method according to claim 1, characterized by the use of a release film ( 3 ) with a thickness equal to the layer thickness of an adhesive for combining the unmolded body parts ( 1, 2 ).
DE3810356A 1988-03-26 1988-03-26 Production process for an element of fibre composite plastic Expired DE3810356C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3810356A DE3810356C1 (en) 1988-03-26 1988-03-26 Production process for an element of fibre composite plastic

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Application Number Priority Date Filing Date Title
DE3810356A DE3810356C1 (en) 1988-03-26 1988-03-26 Production process for an element of fibre composite plastic

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DE3810356C1 true DE3810356C1 (en) 1989-07-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519787A1 (en) * 1991-06-19 1992-12-23 AEROSPATIALE Société Nationale Industrielle Protective cover and method for manufacturing same
EP1134069A1 (en) * 1998-09-30 2001-09-19 Toray Industries, Inc. Hollow structure of fiber-reinforced resin and method of manufacturing the same
DE102012112015A1 (en) * 2012-12-10 2014-06-12 Rehau Ag + Co Method for manufacturing three-dimensional pre-molds from fiber-reinforced thermoplastic plastic material, involves forming pre-mold from arrangement by creation of edge region of arrangement in assigned edge region of arrangement
DE102013209183A1 (en) * 2013-05-17 2014-11-20 Bayerische Motoren Werke Aktiengesellschaft Offended business repair

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1629445A1 (en) * 1966-12-02 1971-02-04 Geiling Kg Ludwig Process for the production of a preferably elongated container by the filament winding process

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1629445A1 (en) * 1966-12-02 1971-02-04 Geiling Kg Ludwig Process for the production of a preferably elongated container by the filament winding process

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519787A1 (en) * 1991-06-19 1992-12-23 AEROSPATIALE Société Nationale Industrielle Protective cover and method for manufacturing same
FR2677917A1 (en) * 1991-06-19 1992-12-24 Aerospatiale METHOD FOR MANUFACTURING PROTECTIVE SHEATH, AND SHEATH OBTAINED
EP1134069A1 (en) * 1998-09-30 2001-09-19 Toray Industries, Inc. Hollow structure of fiber-reinforced resin and method of manufacturing the same
EP1134069A4 (en) * 1998-09-30 2006-01-04 Toray Industries Hollow structure of fiber-reinforced resin and method of manufacturing the same
DE102012112015A1 (en) * 2012-12-10 2014-06-12 Rehau Ag + Co Method for manufacturing three-dimensional pre-molds from fiber-reinforced thermoplastic plastic material, involves forming pre-mold from arrangement by creation of edge region of arrangement in assigned edge region of arrangement
DE102013209183A1 (en) * 2013-05-17 2014-11-20 Bayerische Motoren Werke Aktiengesellschaft Offended business repair

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8100 Publication of patent without earlier publication of application
D1 Grant (no unexamined application published) patent law 81
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8327 Change in the person/name/address of the patent owner

Owner name: DEUTSCHE AEROSPACE AG, 8000 MUENCHEN, DE

8327 Change in the person/name/address of the patent owner

Owner name: EUROCOPTER DEUTSCHLAND GMBH, 8000 MUENCHEN, DE

8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee