DE3913400A1 - Large glass fibre reinforced plastic mouldings - mfd. in specified sequence, esp. used for motor vehicle mfr. - Google Patents
Large glass fibre reinforced plastic mouldings - mfd. in specified sequence, esp. used for motor vehicle mfr.Info
- Publication number
- DE3913400A1 DE3913400A1 DE19893913400 DE3913400A DE3913400A1 DE 3913400 A1 DE3913400 A1 DE 3913400A1 DE 19893913400 DE19893913400 DE 19893913400 DE 3913400 A DE3913400 A DE 3913400A DE 3913400 A1 DE3913400 A1 DE 3913400A1
- Authority
- DE
- Germany
- Prior art keywords
- mold
- glass
- reinforced plastic
- mats
- mfd
- 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.)
- Ceased
Links
- 229920002430 Fibre-reinforced plastic Polymers 0.000 title 1
- 239000003365 glass fiber Substances 0.000 title 1
- 238000010137 moulding (plastic) Methods 0.000 title 1
- 239000011521 glass Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 5
- 239000011888 foil Substances 0.000 claims abstract description 3
- 239000006260 foam Substances 0.000 claims abstract 3
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims 2
- 239000004604 Blowing Agent Substances 0.000 claims 1
- 238000004873 anchoring Methods 0.000 claims 1
- 238000005429 filling process Methods 0.000 claims 1
- 239000012948 isocyanate Substances 0.000 claims 1
- 150000002513 isocyanates Chemical class 0.000 claims 1
- 229920000728 polyester Polymers 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
- B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
- B29C44/146—Shaping the lining before foaming
-
- 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
- B29C70/02—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers
- B29C70/021—Combinations of fibrous reinforcement and non-fibrous material
- B29C70/023—Combinations of fibrous reinforcement and non-fibrous material with reinforcing inserts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruches 1.The invention relates to a method according to the preamble of Claim 1.
Formteile aus GFK von größeren Abmessungen, wie dies z. B. bei Aufbauten von Kfz der Fall ist, werden üblicherweise in mehreren Stufen hergestellt. Zunächst wird eine Trägerschale im Faserspritz- oder Handlaminierverfahren produziert. An die Trägerschale wird eine Schicht aus z. B. Polyurethanschaum aufgeklebt, wodurch keine absolut formschlüssige Verbindung entsteht. Wenn an die innenseitige Oberfläche besondere An sprüche gestellt wird, muß eine weitere Schale erstellt und mit der Polyurethanschicht wiederum verklebt werden. Neben dem Aufwand bei der Herstellung ist bei einem derartig herge stellten Formteil nachteilig, daß die erzielbare Oberflächen güte von geringer Qualität ist. Zur Erzielung einer hohen Oberflächengüte ist dann ein weiterer Herstellungsschritt erforderlich, in dem eine dünne Folie als Außenhaut aufge bracht wird. Sollen zusätzliche Bauteile an dem Formteil befestigt werden, müssen Befestigungselemente mühsam zusätz lich an die Trägerschale anlaminiert werden. Neben dem hohen Herstellungsaufwand ist auch die kraftschlüssige Verbindung zwischen den einzelnen Schichten problematisch.Moldings made of GRP of larger dimensions, such as this. B. in the case of superstructures of motor vehicles, are usually in manufactured in several stages. First, a carrier shell produced by fiber spraying or hand lamination. At the carrier shell is a layer of z. B. polyurethane foam glued on, which means that there is no absolutely positive connection arises. If special to the inside surface is made, another bowl must be created and are glued to the polyurethane layer in turn. Next to the The effort involved in the production is such a herge made molding disadvantageous that the achievable surfaces quality is of poor quality. To achieve a high Surface quality is then another manufacturing step required in which a thin film is applied as the outer skin is brought. Should additional components on the molded part are fastened, fasteners have to be laboriously additional Lich laminated to the carrier shell. In addition to the high Manufacturing effort is also the non-positive connection problematic between the individual layers.
Bei diesen Faserspritz- oder Handlaminierverfahren kommt es sowohl durch die feine Zerstäubung des Harzes beim Spritzen, als auch durch die ungehinderte Ausdünstung der im Harz ent haltenen Lösungsmittel beim Trocknen zu einer erheblichen Belastung der Umwelt.It happens with these fiber spraying or hand lamination processes due to the fine atomization of the resin when spraying, as well as through the unhindered evaporation of the ent in the resin holding solvent when drying to a significant Pollution of the environment.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren vor zuschlagen, mit dem Formteile aus GFK von guter Stabilität (Festigkeit/Steifigkeit), Wärme- und Schallisolierung und hoher Oberflächenqualität mit geringem Aufwand herzustellen sind. Diese Formteile sollen die Umwelt sowohl bei der Her stellung, als auch im Einsatz gering belasten.The invention has for its object a method slam with the molded parts made of GRP of good stability (Strength / rigidity), heat and sound insulation and to produce high surface quality with little effort are. These molded parts are intended to protect both the environment position, as well as in use.
Die Aufgabe wird durch die im kennzeichnenden Teil des An spruchs 1 angegebenen Verfahrensschritte gelöst.The task is performed by the in the characterizing part of the To Proceed 1 specified process steps solved.
Durch das Öffnen der Lüftungsschlitze nach dem Einfüllen des Harzgemisches wird eine optimale chemische Reaktion zwischen den einzelnen Komponenten sichergestellt, wodurch der gesamte Raum zwischen den beiden Formhälften vollständig ausgefüllt wird. Es bildet sich ein solches Materialgefüge aus, daß in den außenliegenden Randbereichen eine feinporige, harte Schicht entsteht, während zur Mitte hin das Gefüge grobporiger wird.By opening the ventilation slots after filling the Resin mixture is an optimal chemical reaction between the individual components, which ensures the entire Space between the two mold halves completely filled becomes. Such a material structure is formed that in a fine-pored, hard on the outer edge areas Layer arises, while towards the middle the structure is coarser becomes.
Die Glasrovings sind mit thermoplastischen Fäden durchzogen und können zusammen mit den thermoplastischen Halbzeugen durch Infrarotheizung verformt werden. Durch die Erwärmung wird eine kraftschlüssige Verbindung zwischen Glasroving und thermopla stischem Halbzeug geschaffen.The glass rovings are crossed with thermoplastic threads and together with the thermoplastic semi-finished products Infrared heating can be deformed. Because of the warming non-positive connection between glass roving and thermopla created semi-finished product.
Der erwünschte Querschnittsaufbau im Hinblick auf die Anfor derungen an die Härte und Zähigkeit der Formteile kann durch quantitative Steuerung des Anteils von Harzgemisch und Glas roving (variiert in Faserrichtung mit Raumgewicht) in weiten Bereichen verändert werden.The desired cross-sectional structure with regard to the requirements Changes in the hardness and toughness of the molded parts can result from quantitative control of the proportion of resin mixture and glass roving (varies in fiber direction with density) in wide Areas are changed.
Durch das mit dem Glasroving verbundene Halbzeug z. B. der Folie, die nach dem Gießen die Außenhaut bildet, lassen sich attraktive Oberflächen erzeugen. By the semi-finished product connected with the glass roving z. B. the Foil, which forms the outer skin after casting, can be Create attractive surfaces.
Aufgrund der Ausdehnungsfähigkeit der Formmasse durch die chemische Reaktion muß in der Form kein Fremddruck aufgebaut werden, um das Harzgemisch über den gesamten Innenraum zu verteilen und ein vollständiges Ausfüllen der Form zu errei chen. Der Innendruck aufgrund der chemischen Reaktion hält sich in geringen Grenzen. Da außerdem eine Beheizung der Form nur auf 40°C erforderlich ist, sind die Anforderungen an das Material aus dem die Formen hergestellt werden müssen, eben falls gering. Es kann zur Herstellung der Formhälften pro blemlos GFK mit entsprechenden Versteifungen verwendet wer den.Due to the expandability of the molding compound chemical reaction does not have to build up external pressure in the form to the resin mixture over the entire interior too distribute and complete the form chen. The internal pressure due to the chemical reaction persists yourself within narrow limits. There is also a heating of the mold is only required at 40 ° C, the requirements for the Material from which the molds have to be made, just if low. It can be used to manufacture the mold halves per Whoever uses GFK with appropriate stiffeners the.
Die Folie als Außenhaut bewirkt gleichzeitig, daß die im Harzgemisch enthaltenen flüchtigen Lösungsmittel nur sehr begrenzt (z. B. an den ungeschützten Kanten) in die Umwelt entweichen können.The film as the outer skin also causes the Resin mixture contains volatile solvents only very much limited (e.g. on the unprotected edges) in the environment can escape.
Bei dem Gießvorgang können die Lösungsmittel nur entweichen, so lange die Lüftungsschlitze und die Einfüllöffnungen geöff net sind.The solvents can only escape during the casting process, as long as the ventilation slots and the filling openings are open are not.
Durch die in den Ansprüchen 2 und 3 angegebenen Verfahrens schritte lassen sich Wandstärken zwischen 4 und 50 mm mit unterschiedlichster Stabilität problemlos realisieren. Als Stützmaterial kann neben dem im Anspruch 3 genannten Metallgeflecht auch Kunststoffgeflecht, extrudierte Kunst stoffteile, Luftpolsterfolie oder Metallteile verwendet wer den.By the method specified in claims 2 and 3 steps with wall thicknesses between 4 and 50 mm Realize different stability without any problems. As a support material, in addition to that mentioned in claim 3 Metal mesh also plastic mesh, extruded art fabric parts, bubble wrap or metal parts used who the.
Durch die Verfahrensschritte nach den Ansprüchen 4 und 5 wird die Herstellung auch im Hinblick auf die weitere Verarbeitung vereinfacht.Through the process steps according to claims 4 and 5 the production also with regard to further processing simplified.
Mit dem beanspruchten Verfahren lassen sich nicht nur Auf bauten für Kfz herstellen, sondern es eignet sich für alle Formteile aus GFK, wo es insbesondere auf hohe Stabilität und/oder Wärme- und/oder Schallisolierung ankommt. Derartige Formteile sind z. B. Lärmschutzabdeckungen für Maschinen aller Art, im Freizeitbereich z. B. Surfboardfinnen oder Gehäuse, die besondere Sicherheitsvorschriften erfüllen müssen z. B. Fahrerkabinen von Hochkränen.With the claimed method, not only can manufacture buildings for motor vehicles, but it is suitable for everyone Molded parts made of GRP, where there is particular stability and / or heat and / or sound insulation arrives. Such Moldings are e.g. B. Noise protection covers for all machines Kind, in the leisure area z. B. surfboard fins or housing, the special safety regulations must meet z. B. Driver's cabs of high cranes.
Die Fig. 1 zeigt die schematische Darstellung einer geschlos senen Form mit einem eingelegten Glasroving. Es ist die Lage der Einfüllöffnungen (9) und der Lüftungsschlitze (8) zu erkennen. Fig. 1 shows the schematic representation of a closed shape with an inserted glass roving. The position of the filling openings ( 9 ) and the ventilation slots ( 8 ) can be seen.
Die Fig. 2 zeigt einen Schnitt durch ein fertiges Formteil mit zwei Glasrovings (5/6) und einem dazwischen angeordneten Stützmaterial (7). Der Dichteaufbau des Kunststoffgefüges ist durch die unterschiedliche Körnungsgröße und -dichte veran schaulicht. Um ein gutes Anliegen der Glasrovings an den Formhälften sicherzustellen, können Distanzhalter (10) zwi schen den Glasrovings (5/6) und dem Stützmaterial (7) vorge sehen sein. Fig. 2 shows a section through a finished molded part with two glass rovings (5/6) and arranged therebetween, a support material (7). The density structure of the plastic structure is illustrated by the different grain size and density. In order to ensure a good fit of the glass rovings on the mold halves, spacers ( 10 ) between the glass rovings ( 5/6 ) and the support material ( 7 ) can be seen.
Claims (5)
- a) In eine Formhälfte (1) wird mindestens eine Matte aus Glasgewebe (5/6) (Glasroving) eingelegt, die auf der (den) zur Oberfläche des fertigen Formteils weisende(n) Seite(n) mit einem thermoplastischen Halbzeug (3/4) (z. B. Folie) verbunden ist.
- b) Die andere Formhälfte (2) wird aufgesetzt und dicht mit der einen Formhälfte (1) verbunden.
- c) In die Form wird ein Harzgemisch aus ungesättigten, vorbeschleunigten Polyestern oder Phinylestern eingefüllt.
- d) Während des Füllvorgangs wird das Harzgemisch mit Treibmitteln und Isozyanaten versetzt.
- e) An der Oberkante der Formhälften (1/2) angeordnete Lüftungsschlitze (8) werden geöffnet.
- f) Beim Austreten eines Schaumgemisches an den Lüf tungsschlitzen (8) bzw. an den Einfüllöffnungen werden beide geschlossen.
- g) Nach einer vorbestimmten Aushärtungszeit werden die Formhälften (1/2) von einander getrennt.
- a) At least one mat made of glass fabric ( 5/6 ) (glass roving) is placed in a mold half ( 1 ), the side (s) facing the surface of the finished molded part (s) with a thermoplastic semi-finished product ( 3 / 4 ) (e.g. foil) is connected.
- b) The other mold half ( 2 ) is placed and tightly connected to one mold half ( 1 ).
- c) A resin mixture of unsaturated, pre-accelerated polyesters or phinylesters is filled into the mold.
- d) During the filling process, blowing agents and isocyanates are added to the resin mixture.
- e) Ventilation slots ( 8 ) arranged on the upper edge of the mold halves ( 1/2 ) are opened.
- f) When a foam mixture emerges at the ventilation slots ( 8 ) or at the filling openings, both are closed.
- g) After a predetermined curing time, the mold halves ( 1/2 ) are separated from each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893913400 DE3913400A1 (en) | 1989-04-24 | 1989-04-24 | Large glass fibre reinforced plastic mouldings - mfd. in specified sequence, esp. used for motor vehicle mfr. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893913400 DE3913400A1 (en) | 1989-04-24 | 1989-04-24 | Large glass fibre reinforced plastic mouldings - mfd. in specified sequence, esp. used for motor vehicle mfr. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3913400A1 true DE3913400A1 (en) | 1990-10-25 |
Family
ID=6379308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19893913400 Ceased DE3913400A1 (en) | 1989-04-24 | 1989-04-24 | Large glass fibre reinforced plastic mouldings - mfd. in specified sequence, esp. used for motor vehicle mfr. |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3913400A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2691100A1 (en) * | 1992-05-18 | 1993-11-19 | Ecia Equip Composants Ind Auto | Foam filled moulded part partic. for automobile interiors - is formed in mould having variable controlled closing force on envelope edges, to allow air escape during foaming of filling |
DE4434657A1 (en) * | 1994-09-28 | 1996-04-04 | Schwartz G Gmbh & Co Kg | Part made by polymerisation of lactam(s) in mould |
DE19723740A1 (en) * | 1997-06-06 | 1998-12-10 | Duewag Ag | Vehicle superstructure with doors |
DE19808026C2 (en) * | 1998-02-26 | 2001-11-29 | Edscha Cabrio Dachsys Gmbh | Process for producing molded plastic parts, in particular car roofs, and device for carrying out this process |
WO2009070128A1 (en) * | 2007-11-26 | 2009-06-04 | Domel, D.D. | Reinforced pump motor support |
WO2011073325A1 (en) * | 2009-12-18 | 2011-06-23 | Basf Se | Polyurethane composite system having high compressive strength and rigidity |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1220065A (en) * | 1967-08-02 | 1971-01-20 | Dreamland Electrical Appliance | Method of producing a pad or sheet of foamed material having an electrical conductor wire or wires or an electrically conductive sheet or sheets embedded therein |
DE2934727A1 (en) * | 1979-08-28 | 1981-03-12 | Metzeler Schaum Gmbh, 8940 Memmingen | Prodn. of reinforced contoured moulds for automobiles and furniture - by bonding fibres to surface layer before foaming |
DE3521828C2 (en) * | 1985-06-19 | 1987-09-17 | Pegulan-Werke Ag, 6710 Frankenthal, De |
-
1989
- 1989-04-24 DE DE19893913400 patent/DE3913400A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1220065A (en) * | 1967-08-02 | 1971-01-20 | Dreamland Electrical Appliance | Method of producing a pad or sheet of foamed material having an electrical conductor wire or wires or an electrically conductive sheet or sheets embedded therein |
DE2934727A1 (en) * | 1979-08-28 | 1981-03-12 | Metzeler Schaum Gmbh, 8940 Memmingen | Prodn. of reinforced contoured moulds for automobiles and furniture - by bonding fibres to surface layer before foaming |
DE3521828C2 (en) * | 1985-06-19 | 1987-09-17 | Pegulan-Werke Ag, 6710 Frankenthal, De |
Non-Patent Citations (1)
Title |
---|
"Plastverarbeiter", 1985, Nr. 2, S. 22 - 31 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2691100A1 (en) * | 1992-05-18 | 1993-11-19 | Ecia Equip Composants Ind Auto | Foam filled moulded part partic. for automobile interiors - is formed in mould having variable controlled closing force on envelope edges, to allow air escape during foaming of filling |
DE4434657A1 (en) * | 1994-09-28 | 1996-04-04 | Schwartz G Gmbh & Co Kg | Part made by polymerisation of lactam(s) in mould |
DE19723740A1 (en) * | 1997-06-06 | 1998-12-10 | Duewag Ag | Vehicle superstructure with doors |
DE19808026C2 (en) * | 1998-02-26 | 2001-11-29 | Edscha Cabrio Dachsys Gmbh | Process for producing molded plastic parts, in particular car roofs, and device for carrying out this process |
WO2009070128A1 (en) * | 2007-11-26 | 2009-06-04 | Domel, D.D. | Reinforced pump motor support |
WO2011073325A1 (en) * | 2009-12-18 | 2011-06-23 | Basf Se | Polyurethane composite system having high compressive strength and rigidity |
CN102844165A (en) * | 2009-12-18 | 2012-12-26 | 巴斯夫欧洲公司 | Polyurethane composite system having high compressive strength and rigidity |
CN102844165B (en) * | 2009-12-18 | 2015-01-28 | 巴斯夫欧洲公司 | Polyurethane composite system having high compressive strength and rigidity |
AU2010332880B2 (en) * | 2009-12-18 | 2016-01-07 | Basf Se | Polyurethane composite system having high compressive strength and rigidity |
US10125230B2 (en) | 2009-12-18 | 2018-11-13 | Basf Se | Polyurethane composite system having high compressive strength and rigidity |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8125 | Change of the main classification |
Ipc: B29C 67/20 |
|
8131 | Rejection |