DE102006049180B4 - Method for producing a one-part thermoset body - Google Patents
Method for producing a one-part thermoset body Download PDFInfo
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- DE102006049180B4 DE102006049180B4 DE102006049180.7A DE102006049180A DE102006049180B4 DE 102006049180 B4 DE102006049180 B4 DE 102006049180B4 DE 102006049180 A DE102006049180 A DE 102006049180A DE 102006049180 B4 DE102006049180 B4 DE 102006049180B4
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229920001187 thermosetting polymer Polymers 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000012778 molding material Substances 0.000 claims abstract description 23
- 125000006850 spacer group Chemical group 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 37
- 239000002131 composite material Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000003677 Sheet moulding compound Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
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- 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
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
-
- 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
-
- 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
- B29C2043/3665—Moulds for making articles of definite length, i.e. discrete articles cores or inserts, e.g. pins, mandrels, sliders
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
-
- 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
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
-
- 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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
-
- 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
-
- 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
- B29K2105/048—Expandable particles, beads or granules
-
- 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
- B29K2105/0872—Prepregs
-
- 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
- B29L2022/00—Hollow articles
-
- 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
- B29L2022/00—Hollow articles
- B29L2022/005—Hollow articles having dividing walls, e.g. additional elements placed between object parts
- B29L2022/007—Hollow articles having dividing walls, e.g. additional elements placed between object parts integrally moulded or formed
-
- 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
- B29L2031/3005—Body finishings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Verfahren zum Herstellen eines einteiligen Körpers (10) mit einem Hohlraum (14) aus mindestens einem Formmaterial (18), das mittels eines Umformpresswerkzeugs (12) umgeformt wird unter Ausbildung eines ausgehärteten, duroplastischen Körpers (10), dadurch gekennzeichnet, dass zur Bildung des Hohlraums (14) ein Kernelement (16) im Formmaterial (18) innerhalb des Umformpresswerkzeugs (12) mit Formschalen (24, 26) geeignet angeordnet wird, und eine untere Formschale (26) verwendet wird, die eine Mehrzahl an innen angeordneten Rippen (30) aufweist und zwischen den Formschalen (24, 26) im Bereich der Rippen (30) entsprechend ausgebildete Abstandshalter (34) an der oberen Formschale (24) befestigt sind, so dass beim Umformpressvorgang der Rippen (30) kein direkter Anlagekontakt derselben mit der oberen Formschale (24) auftreten kann.A method for producing a one-piece body (10) with a cavity (14) from at least one molding material (18) which is reshaped by means of a reshaping press tool (12) to form a cured, thermosetting body (10), characterized in that for the formation of the Cavity (14) a core element (16) is suitably arranged in the molding material (18) within the forming press tool (12) with mold shells (24, 26), and a lower mold shell (26) is used, which has a plurality of ribs (30 ) and between the mold shells (24, 26) in the region of the ribs (30) appropriately designed spacers (34) are attached to the upper mold shell (24) so that during the forming process of the ribs (30) there is no direct contact between them and the upper one Molding shell (24) can occur.
Description
Die Erfindung betrifft ein verfahren zum Herstellen eines einteiligen Körpers aus mindestens einem Formmaterial, das mittels eines Umformpresswerkzeugs umgeformt wird unter Ausbildung eines ausgehärteten, duroplastischen Körpers, sowie hieraus erhältliche Serienkarosserieelemente.The invention relates to a method for producing a one-piece body of at least one molding material, which is formed by means of a Umformpresswerkzeugs to form a cured, thermoset body, as well as series body elements available therefrom.
Verfahren der eingangs genannten Art sind bekannt. Beispielsweise offenbart die
Aus der
Es ist Aufgabe der Erfindung, ein flexibel einsetzbares Verfahren zum Herstellen eines einteiligen Duroplastkörpers anzugeben.It is an object of the invention to provide a flexible method for producing a one-piece Duroplastkörpers.
Die Aufgabe wird gelöst durch ein Verfahren mit den Merkmalen des Anspruchs 1. Das erfindungsgemäße Verfahren zeichnet sich dadurch aus, dass der Körper ein Hohlkörper mit einem Hohlraum ist, wobei zur Bildung des Hohlraums ein Kernelement im Formmaterial innerhalb des Umformpresswerkzeugs geeignet angeordnet wird. Dabei weist die untere Formschale eine Mehrzahl an innen angeordneten Rippen auf und es sind zwischen den Formschalen im Bereich der Rippen entsprechend ausgebildete Abstandshalter an der oberen Formschale befestigt, so dass beim Umformpressvorgang der Rippen kein direkter Anlagekontakt derselben mit der oberen Formschale auftreten kann.The object is achieved by a method having the features of claim 1. The method according to the invention is characterized in that the body is a hollow body with a cavity, wherein a core element in the molding material within the forming die is suitably arranged to form the cavity. In this case, the lower mold shell has a plurality of internally arranged ribs and there are fastened between the mold shells in the region of the ribs correspondingly formed spacers on the upper mold shell, so that during the Umformpressvorgang the ribs no direct investment contact thereof may occur with the upper mold shell.
Mittels des Verfahrens ist es nun möglich, ein duroplastisches Formmaterial mittels eines Umformpresswerkzeugs unter Ausnutzung eines Aushärtungsprozesses derart umzuformen, dass ein einteiliger Hohlkörper mit einem Hohlraum hergestellt werden kann. Bei traditionellen Hohlkörperherstellungsverfahren werden lediglich einzelne Körperanteile aus einem duroplastischen Formmaterial mittels eines Umformpresswerkzeugs hergestellt und anschließend miteinander beispielsweise mittels einer Niet-, Schraub- oder Klebverbindung zusammengefügt. Diese traditionelle Methode zur Herstellung eines Hohlkörpers ist dabei verhältnismäßig kompliziert und fertigungstechnisch aufwendig.By means of the method it is now possible to transform a thermosetting molding material by means of a forming press tool utilizing a curing process such that a one-piece hollow body can be produced with a cavity. In traditional hollow body manufacturing processes, only individual body parts are produced from a thermosetting molding material by means of a forming press tool and then joined together, for example, by means of a rivet, screw or adhesive connection. This traditional method for producing a hollow body is relatively complicated and expensive to manufacture.
Der Hohlkörper kann mittels des Umformpresswerkzeugs in einem einzigen Umformpressvorgang hergestellt werden. Hierbei ist es möglich, dass der Umformprozess und der Aushärteprozess voneinander getrennt oder nahezu gleichzeitig erfolgen.The hollow body can be produced by means of the forming press tool in a single Umformpressvorgang. In this case, it is possible that the forming process and the curing process are separated from each other or occur almost simultaneously.
Der Hohlkörper kann aus verschiedenen duroplastischen Formmaterialien bestehen. Dabei können die verschiedenen Formmaterialien ggf. unterschiedliche Funktionen erfüllen, z. B. eine Trägerfunktion in einem festigkeitsrelevanten Bereich des Hohlkörpers oder eine ästhetische Funktion an einer Sichtseite des Hohlkörpers.The hollow body may consist of different duroplastic molding materials. The different molding materials may possibly fulfill different functions, eg. B. a carrier function in a strength-relevant area of the hollow body or an aesthetic function on a visible side of the hollow body.
Das Formmaterial kann vor dem Aushärten aus mindestens einem Rohelement und insbesondere aus zwei voneinander getrennten Rohelementen bestehen. Ferner kann das Rohelement vor dem Aushärten aus einer Formmasse bestehen, die insbesondere mattenförmig ausgebildet ist. Die Formmasse kann z. B. ein SMC (Sheet Molding Compound) sein, das insbesondere mattenförmig ausgebildet ist. Gegebenenfalls kann das Rohelement auch als ebenes Zuschnittelement ausgebildet sein. Derartige Rohelemente sind an sich bekannt, wobei sie mittels des Verfahrens besonders flexibel zur Herstellung eines Hohlkörpers genutzt werden können. Das Formmaterial kann beispielsweise ein Faserverbundwerkstoff sein.The molding material may consist of at least one raw element before curing and in particular of two separate raw elements. Furthermore, the raw element prior to curing may consist of a molding compound, which is in particular mat-shaped. The molding composition may, for. As an SMC (Sheet Molding Compound), which is in particular mat-shaped. Optionally, the raw element may also be formed as a flat blank element. Such raw elements are known per se, whereby they can be used by means of the method particularly flexible for the production of a hollow body. The molding material may be, for example, a fiber composite material.
Gemäß einer möglichen Ausführungsvariante ist der Körper als ein mehrschaliger Körper mit Formschalen ausgebildet, die miteinander entlang ihres Umfangs stoffschlüssig verbunden sind. Das Verfahren erlaubt nun vorteilhaft, im Rahmen eines einzigen Umformpressvorgangs einen mehrschaligen Hohlkörper herzustellen. Dabei kann der Körper entlang seines vollständigen Umfangs oder auch nur entlang eines Teils seines Umfangs stoffschlüssig miteinander verbundene Formschalen enthalten.According to a possible embodiment, the body is designed as a multi-shell body with shell molds, which are connected to one another cohesively along its circumference. The method now advantageously allows producing a multi-shell hollow body within the scope of a single forming press operation. In this case, the body along its entire circumference or only along part of its circumference may contain cohesively connected shell molds.
Die Aushärtung des Formmaterials innerhalb des Umformpresswerkzeugs kann unter erhöhtem Betriebsdruck und/oder unter erhöhter Betriebstemperatur erfolgen. Dabei ist der Aushärtungsprozess des Formmaterials an sich bekannt.The curing of the molding material within the forming press tool can be carried out under increased operating pressure and / or under increased operating temperature. In this case, the curing process of the molding material is known per se.
Das Kernelement kann als ein separates Funktionselement ausgebildet sein und ggf. aus einem löslichen Kernmaterial oder aus einem schmelzbaren Kernmaterial oder aus einem zersetzbaren Kernmaterial bestehen. Somit können in Abhängigkeit der Herstellungsanforderungen an den Hohlkörper jeweils geeignete Kernelemente vorgesehen werden, wobei die unterschiedlichen Kernmaterialien an sich bekannt sind.The core element may be formed as a separate functional element and possibly consist of a soluble core material or of a fusible core material or of a decomposable core material. Thus, in each case suitable core elements can be provided depending on the manufacturing requirements of the hollow body, wherein the different core materials are known per se.
Der Körper kann ein im Wesentlichen geschlossener Hohlkörper mit mindestens einer Öffnung sein, durch welche der Hohlraum von außen zugänglich ist. Dabei kann das Kernelement nach der Aushärtung des Formmaterials aus dem Körper entfernt werden oder ggf. auch in selbigem verbleiben. Letztere Variante wäre auch z. B. bei einem vollständig geschlossenen Hohlkörper möglich.The body may be a substantially closed hollow body having at least one opening through which the cavity from the outside is accessible. In this case, the core element can be removed after the curing of the molding material from the body or possibly even remain in selbigem. The latter variant would also be z. B. possible with a completely closed hollow body.
Gemäß einer möglichen Ausführungsform ist das Kernelement ein kompressibles Kernelement und/oder ein expandierendes Kernelement. Das Kernelement ist ggf. aus einem porösen Kernmaterial hergestellt. Somit lassen sich mittels des Verfahrens unterschiedlichste Hohlkörper herstellen, wobei das Kernelement aus dem Hohlkörper entfernt werden oder auch gegebenenfalls in selbigem verbleiben kann. Das Kernelement kann gegebenenfalls auf Grund seiner Expansionseigenschaften während des Umformpressverfahrens zur Erzielung einer hinreichend guten Formgenauigkeit des Hohlkörpers genutzt werden.According to a possible embodiment, the core element is a compressible core element and / or an expanding core element. The core element is possibly made of a porous core material. Thus, by means of the method, a very wide variety of hollow bodies can be produced, wherein the core element can be removed from the hollow body or optionally also remain in the same. The core element may optionally be used due to its expansion properties during the Umformpressverfahrens to achieve a sufficiently good dimensional accuracy of the hollow body.
Entsprechend einer möglichen Ausführungsvariante kann das Kernelement und/oder das Umformpresswerkzeug eine Seite mit einer geometrischen Oberflächenstrukturierung und eine Seite mit einer ebenen Oberfläche aufweisen. Ferner kann das Kernelement eine Mehrzahl an zueinander beabstandet angeordneten Kernteilen enthalten zu Herstellung eines räumlich strukturierten Hohlraumes. Das Kernelement kann einteilig oder mehrteilig ausgebildet sein. Dabei kann ein mehrteiliges Kernelement aus unterschiedlichen Kernmaterialien bestehen. Auf Grund der Möglichkeit einer besonders flexiblen Kernausgestaltung lassen sich auf verhältnismäßig einfache Weise unterschiedlichste Anforderungen an das Verfahren zur Herstellung von Hohlkörpern aus einem duroplastischen Formmaterial mittels eines geeigneten Umformpresswerkzeugs reproduzierbar genau erfüllen.According to a possible embodiment variant, the core element and / or the forming press tool can have a side with a geometric surface structuring and a side with a flat surface. Furthermore, the core element may include a plurality of spaced-apart core parts for producing a spatially structured cavity. The core element may be formed in one or more parts. In this case, a multipart core element consist of different core materials. Due to the possibility of a particularly flexible core design can be met in a relatively simple manner a variety of requirements for the process for producing hollow bodies of a thermosetting molding material by means of a suitable Umformpresswerkzeugs reproducible exactly.
Das Verfahren eignet sich insbesondere zu Herstellung eines Körpers, der ein Serienkarosserieelement für ein Fahrzeug ist. Auf Grund der hohen Anzahl an mittels des Verfahrens herstellbaren Körpern lassen sich ggf. erhebliche Herstellungskosten und insbesondere verhältnismäßig kurze Herstellungszeiten für die entsprechenden Körper erzielen.The method is particularly suitable for producing a body that is a standard bodywork element for a vehicle. Due to the large number of bodies that can be produced by the process, it is possible to achieve considerable production costs and, in particular, relatively short production times for the corresponding bodies.
Das Umformpresswerkzeug kann eine Stempeleinheit und eine Gegenhaltereinheit aufweisen. Dabei kann die Stempeleinheit und/oder die Gegenhaltereinheit in mindestens einer Umformrichtung bewegbar sein. Prinzipiell sind auch andere konstruktive Ausgestaltungen eines Umformpresswerkzeugs denkbar.The forming press tool can have a stamp unit and a counterholder unit. In this case, the stamp unit and / or the counter-holder unit can be movable in at least one forming direction. In principle, other structural configurations of a forming press are conceivable.
Weitere Vorteile der Erfindung ergeben sich aus der Beschreibung.Further advantages of the invention will become apparent from the description.
Die Erfindung wird anhand mehrerer bevorzugter Ausführungsbeispiele unter Bezugnahme auf eine schematische Zeichnung näher erläutert.The invention will be explained in more detail with reference to several preferred embodiments with reference to a schematic drawing.
Dabei zeigen:Showing:
Zur Herstellung eines Körpers
In
Claims (8)
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DE102006049180.7A DE102006049180B4 (en) | 2006-10-18 | 2006-10-18 | Method for producing a one-part thermoset body |
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DE10219276A1 (en) * | 2002-04-30 | 2003-11-20 | Daimler Chrysler Ag | Device for gently removing and removing a press molded part from the press mold |
US6713008B1 (en) * | 2000-06-23 | 2004-03-30 | Darrin Blake Teeter | Method for making composite structures |
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Patent Citations (2)
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US6713008B1 (en) * | 2000-06-23 | 2004-03-30 | Darrin Blake Teeter | Method for making composite structures |
DE10219276A1 (en) * | 2002-04-30 | 2003-11-20 | Daimler Chrysler Ag | Device for gently removing and removing a press molded part from the press mold |
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