DE2827574A1 - Glass-fibre-reinforced PVC car body parts - are made by blow-moulding PVC component, placing into prepreg-lined mould, and curing under pressure - Google Patents

Glass-fibre-reinforced PVC car body parts - are made by blow-moulding PVC component, placing into prepreg-lined mould, and curing under pressure

Info

Publication number
DE2827574A1
DE2827574A1 DE19782827574 DE2827574A DE2827574A1 DE 2827574 A1 DE2827574 A1 DE 2827574A1 DE 19782827574 DE19782827574 DE 19782827574 DE 2827574 A DE2827574 A DE 2827574A DE 2827574 A1 DE2827574 A1 DE 2827574A1
Authority
DE
Germany
Prior art keywords
hollow body
pvc
prepregs
mould
blow
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Withdrawn
Application number
DE19782827574
Other languages
German (de)
Inventor
Guenter Ing Grad Knuedel
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE19782827574 priority Critical patent/DE2827574A1/en
Publication of DE2827574A1 publication Critical patent/DE2827574A1/en
Withdrawn legal-status Critical Current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
    • 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
    • B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
    • 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
    • B29C33/0011—Moulds or cores; Details thereof or accessories therefor thin-walled moulds
    • B29C33/0016—Lost moulds, e.g. staying on the moulded object
    • 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
    • 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
    • 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
    • B29K2105/0809—Fabrics
    • 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
    • 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
    • B29L2031/3055—Cars

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

Mfr. of mouldings is carried out using pre-impregnated glass-fibre mattings or fabric ("prepregs"). A 'lost mould' in the shape of a hollow body is prepared from a material having the properties and characteristics of PVC. The resulting hollow body is placed into a repeat mould lined wiht prepregs. The mould is closed, and hollow body and prepregs are press-moulded and cured. During this last step, the hollow body is subjected to pressure, suitably by supply of compressed air. The hollow body may be made by blow-moulding. Any fittings and/or reinforcements are fixed to the hollow body before the mould is closed.

Description

Verfahren zum Herstellen von Form- Method for producing molds

teilen, insbesondere Karosserieteilen Die Erfindung betrifft ein Verfahren der im Oberbegriff des Eauptanspruchs genannten Art. Entsprechende Angaben finden sich insbesondere auf den Seiten 364/365 von Bussien ItAutomobiltechnisches Handbuch", 18. Auflage, Band 1. Vom Apparatebau her ist ferner bekannt, mit Harz getränkte Rovings über aus PVC bestehende dünnwandige, symmetrische Hohlkörper zu wickeln, wodurch sehr stabile Behälter gewonnen werden. share, in particular body parts The invention relates to a Procedure of the type mentioned in the preamble of the main claim. Corresponding information can be found in particular on pages 364/365 of Bussien ItAutomobiltechnisches Handbuch ", 18th edition, volume 1. Apparatus construction is also known with resin soaked rovings over thin-walled, symmetrical hollow bodies made of PVC wrap, which results in very stable containers.

Der Hohlkörper stellt somit eine verlorene Form dar.The hollow body thus represents a lost shape.

Für größere Teile, insbesondere Karosserieteile, haben glasfaserverstärkte Kunststoffe (GFK) trotz ihres geringen Gewichts bei hoher Festigkeit noch nicht serienmäßig Eingang gefunden, obwohl sie seit langem bekannt sind, da die Materialkosten und der Fertigungsaufwand bisher zu hoch waren.For larger parts, especially body parts, have glass fiber reinforced Plastics (GRP), despite their low weight and high strength, are not yet standard entry, although they have long been known because of the cost of materials and the manufacturing costs were previously too high.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, das bei geringem Material und Fertigungsaufwand ein Formteil hoher Festigkeit, insbesondere ein Karosserieteil, herzustellen gestattet, wobei das Verfahren großserienfreundlich sein soll. Die erfindungsgemäße Lösung dieser Aufgabe ist gekennzeichnet durch die Merkmale des Hauptanspruchs; vorteilhafte Ausgestaltungen des Verfahrens sind Gegenstand der Unteransprüche.The invention is based on the object of a method of the above called type to create a molded part with little material and manufacturing effort high strength, especially a body part, to manufacture allowed, whereby the process should be mass-production friendly. The inventive The solution to this problem is characterized by the features of the main claim; Advantageous refinements of the method are the subject of the subclaims.

Durch das erfindungsgemäße Verfahren können eine Ober- und eine Unterschale aufweisende Formteile, beispielsweise eine Heckklappe eines Kraftfahrzeugs, in einem Arbeitsgang hergestellt werden. Dies ist hinsichtlich der Kapazität der Preßform günstig, die ja wegen der Reaktionszeit des Gießharzes eine gewisse Zeit geschlossen bleiben muß. Durch den Verbund zwischen Hohlkörper einerseits und Prepregs andererseits wird ein Festigkeitszuwachs erzielt, der eine Reduzierung des Materialaufwands insbesondere für die Prepregs zuläßt.With the method according to the invention, an upper and a lower shell having molded parts, for example a tailgate of a motor vehicle, in one Operation are produced. This is in terms of the capacity of the die cheap, which closed for a certain time because of the reaction time of the casting resin must stay. Due to the bond between the hollow body on the one hand and prepregs on the other an increase in strength is achieved which, in particular, leads to a reduction in the cost of materials for the prepregs.

Zur Erläuterung der Erfindung ist in der Figur ein Querschnitt durch eine nach dem erfindungsgemäßen Verfahren hergestellte Fahrzeug-Heckklappe wiedergegeben. Die allgemein mit 1 bezeichnete Heckklappe weist die Ausnehmung 2 zur Aufnahme einer Heckfensterscheibe auf.To explain the invention, a cross section is shown in the figure a vehicle tailgate produced by the method according to the invention is shown. The tailgate, generally designated 1, has the recess 2 for receiving a Rear window on.

In ihrem oberen, in der Figur linken Bereich ist sie durch nicht dargestellte Scharniere im eingebauten Zustand angelenkt an einen Türrahmen in der hinteren Wand der Karosserie; im Bereich ihrer unteren, in der Figur rechten Kante wird die Heckklappe mit einem ebenfalls nicht dargestellten Schloß versehen. Darüber findet sich der leistenartige Fortsatz 3, der einen Handgriff zum Hochschwenken der Heckklappe darstellt.In its upper, left-hand area in the figure, it is not shown by When installed, hinges are attached to a door frame in the rear wall the body; in the area of its lower, right-hand edge in the figure, the tailgate is provided with a lock, also not shown. The strip-like extension 3, which represents a handle for pivoting up the tailgate.

Die gesamte Heckklappe ist - abgesehen von der Herstellung der verlorenen Form - in einem einzigen Herstellungsprozeß zweischalig gewonnen, nämlich mit einer nach außen weisenden Oberschale 4 und einer in Richtung auf das Fahrzeuginnere weisenden Unterschale 5. Diese beiden Schalen schließen zwischen sich einen Hohlraum 6 ein.The entire tailgate is - apart from making the lost Form - obtained in two shells in a single manufacturing process, namely with one outwardly facing upper shell 4 and one facing in the direction of the vehicle interior Lower shell 5. These two shells enclose a cavity 6 between them.

Die Heckklappe besteht aus dem eine verlorene Form darstellenden Hohlkörper 7 aus PVC oder einem ähnliche Eigenschaften aufweisenden Material, der vorzugsweise im Blasverfahren gewonnen und dann in eine Wiederholungs-Preßform eingelegt wird. Diese Preßform ist ausgekleidet mit Prepregs, also vorimprägnierten GFK-Matten und/oder -Geweben, die später die in der Figur bei 8 angedeutete GFK-Ummantelung in einer Stärke von-beispielsweise 1,5 mm bilden. Vor dem Schließen der Form werden Scharniere und andere Beschläge, gegebenenfalls auch Verstärkungen, an dem Hohlkörper 7 fixiert. Sodann wird durch einen Preßvorgang in der Preßform, der mit einer Wärmezufuhr verbunden sein kann, eine feste Verbindung zwischen den Prepregs einerseits und dem Hohlkörper 7 andererseits hergestellt, so daß die Prepregs eine Ummantelung bilden.The tailgate consists of the hollow body which represents a lost shape 7 made of PVC or a material exhibiting similar properties, the preferably obtained by blow molding and then placed in a repetitive mold will. This mold is lined with prepregs, i.e. pre-impregnated GRP mats and / or fabrics, which later have the GRP sheathing indicated at 8 in the figure in a thickness of -for example 1.5 mm. Before closing the mold will be Hinges and other fittings, possibly also reinforcements, on the hollow body 7 fixed. Then by a pressing process in the mold, which with a heat supply can be connected, a solid connection between the prepregs on the one hand and the hollow body 7 on the other hand made so that the prepregs a jacket form.

Während des Preß- und Aushärtungsvorgangs muß dafür gesorgt werden, daß der Hohlkörper 7 den entsprechenden Gegendruck aufbringt, also er nicht durch den von außen aufgebrachten Preßdruck zusammengedrückt wird. Dies geschieht zweckmäßigerweise durch Druckluftzufuhr, Besonders zweckmäßig ist es, wenn der Hohlkörper 7 in einem Blasverfahren hergestellt wird. Derartige Verfahren sind bekannt und brauchen daher im einzelnen nicht beschrieben zu werden.During the pressing and hardening process it must be ensured that that the hollow body 7 applies the corresponding counter pressure, so he does not the externally applied pressure is compressed. This is done expediently by supplying compressed air, it is particularly useful if the hollow body 7 in one Blow molding is produced. Such methods are known and therefore need not to be described in detail.

Claims (5)

AN SPRÜCRE 1. Verfahren zum Herstellen von Formteilen, insbesondere Earosserieteilen für Fahrzeuge, unter Verwendung von vorimprägnierten GFK-Matten oder -Geweben (Prepreg), gekennzeichnet durch folgende Schritte: a.) Es wird eine verlorene Form in Gestalt eines Hohlkörpers (7) aus einem Material mit den Eigenschaften von PVC hergestellt; b.) der Hohlkörper (7) wird in eine mit Prepregs ausgekleidete Wiederholungspre#form gelegt, und c.) nach Schließen der Preßform werden Hohlkörper und Prepregs verpreßt und ausgehärtet. AN SPRÜCRE 1. Process for the production of molded parts, in particular Ear body parts for vehicles, using pre-impregnated GRP mats or -weave (prepreg), characterized by the following steps: a.) It is a lost shape in the form of a hollow body (7) made of a material with the properties made of PVC; b.) the hollow body (7) is lined with prepregs in a Repeat pre # form placed, and c.) After closing the mold, hollow bodies are and prepregs pressed and cured. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß während des Preß- und Aushärtungsvorgangs der Hohlkörper (7) unter Uberdruck gesetzt wird.2. The method according to claim 1, characterized in that during of the pressing and curing process, the hollow body (7) is placed under excess pressure. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Rohlkörper (7) durch DruckluStzuSuhr unter Überdruck gesetzt wird.3. The method according to claim 2, characterized in that the blank body (7) is pressurized by a pressurized air supply. 4. Verfahren nach einem der Anspräche 1 bis 3, dadurch gekennzeichnet, daß der Hohlkörper (7) durch ein Blasverfahren hergestellt wird.4. The method according to any one of claims 1 to 3, characterized in that that the hollow body (7) is produced by a blow molding process. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Beschläge und/oder Verstärkungen an dem Hohlkörper (7) vor dem Schließen der Preßform fixiert werden.5. The method according to any one of claims 1 to 4, characterized in that that fittings and / or reinforcements on the hollow body (7) before closing the Mold are fixed.
DE19782827574 1978-06-23 1978-06-23 Glass-fibre-reinforced PVC car body parts - are made by blow-moulding PVC component, placing into prepreg-lined mould, and curing under pressure Withdrawn DE2827574A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782827574 DE2827574A1 (en) 1978-06-23 1978-06-23 Glass-fibre-reinforced PVC car body parts - are made by blow-moulding PVC component, placing into prepreg-lined mould, and curing under pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782827574 DE2827574A1 (en) 1978-06-23 1978-06-23 Glass-fibre-reinforced PVC car body parts - are made by blow-moulding PVC component, placing into prepreg-lined mould, and curing under pressure

Publications (1)

Publication Number Publication Date
DE2827574A1 true DE2827574A1 (en) 1980-01-10

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Application Number Title Priority Date Filing Date
DE19782827574 Withdrawn DE2827574A1 (en) 1978-06-23 1978-06-23 Glass-fibre-reinforced PVC car body parts - are made by blow-moulding PVC component, placing into prepreg-lined mould, and curing under pressure

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DE (1) DE2827574A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555496A1 (en) * 1983-11-30 1985-05-31 Gruet Michel Moulding process using a lost mould
US4575447A (en) * 1982-07-29 1986-03-11 Nippon Gakki Seizo Kabushiki Kaisha Method for producing a wood-type golf club head
EP0363744A2 (en) * 1988-10-14 1990-04-18 The Budd Company One piece molded composite part and method of manufacture
DE102017100621A1 (en) 2017-01-13 2018-07-19 Teufelberger Ges.M.B.H. fitting

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575447A (en) * 1982-07-29 1986-03-11 Nippon Gakki Seizo Kabushiki Kaisha Method for producing a wood-type golf club head
FR2555496A1 (en) * 1983-11-30 1985-05-31 Gruet Michel Moulding process using a lost mould
EP0363744A2 (en) * 1988-10-14 1990-04-18 The Budd Company One piece molded composite part and method of manufacture
EP0363744A3 (en) * 1988-10-14 1991-07-10 The Budd Company One piece molded composite part and method of manufacture
DE102017100621A1 (en) 2017-01-13 2018-07-19 Teufelberger Ges.M.B.H. fitting
WO2018130640A1 (en) 2017-01-13 2018-07-19 Teufelberger Ges.M.B.H. Moulded piece

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