DE102007042427A1 - Molded part producing method, involves foam coating core element with plastic material, removing core element afterwards from molded part, and shredding core element by applying compressive force - Google Patents
Molded part producing method, involves foam coating core element with plastic material, removing core element afterwards from molded part, and shredding core element by applying compressive force Download PDFInfo
- Publication number
- DE102007042427A1 DE102007042427A1 DE200710042427 DE102007042427A DE102007042427A1 DE 102007042427 A1 DE102007042427 A1 DE 102007042427A1 DE 200710042427 DE200710042427 DE 200710042427 DE 102007042427 A DE102007042427 A DE 102007042427A DE 102007042427 A1 DE102007042427 A1 DE 102007042427A1
- Authority
- DE
- Germany
- Prior art keywords
- core element
- molded part
- plastic material
- foam
- compressive force
- 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- Withdrawn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
- 239000000463 material Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229920003023 plastic Polymers 0.000 title claims abstract description 14
- 239000004033 plastic Substances 0.000 title claims abstract description 14
- 239000006260 foam Substances 0.000 title abstract description 13
- 239000011248 coating agent Substances 0.000 title abstract 3
- 238000000576 coating method Methods 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000013016 damping Methods 0.000 claims abstract description 5
- 230000009172 bursting Effects 0.000 claims abstract description 3
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 11
- 239000011496 polyurethane foam Substances 0.000 claims description 11
- 238000005187 foaming Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 229920002635 polyurethane Polymers 0.000 abstract description 3
- 239000004814 polyurethane Substances 0.000 abstract description 3
- 239000011162 core material Substances 0.000 description 39
- 238000000465 moulding Methods 0.000 description 18
- 239000002984 plastic foam Substances 0.000 description 10
- 238000009423 ventilation Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000005096 rolling process 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
- B29C44/583—Moulds for making articles with cavities
-
- 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
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/448—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles destructible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/56—Heating or ventilating devices
- B60N2/5607—Heating or ventilating devices characterised by convection
- B60N2/5621—Heating or ventilating devices characterised by convection by air
- B60N2/5657—Heating or ventilating devices characterised by convection by air blown towards the seat surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/70—Upholstery springs ; Upholstery
- B60N2/7017—Upholstery springs ; Upholstery characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for
-
- 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
- B29K2875/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as mould material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Manufacturing & Machinery (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines einen Hohlraum umfassenden Formteils, bei dem ein Kernelement mit einem Kunststoffwerkstoff umschäumt wird und das Kernelement anschließend aus dem Formteil entfernt wird.The The invention relates to a method for producing a cavity comprehensive molding in which a core element with a plastic material is foamed and the core element subsequently is removed from the molding.
Ein
solches, gattungsgemäßes Verfahren ist aus der
Nachteilig
an allen drei in der
Ausgehend von diesem Stand der Technik liegt der Erfindung daher die Aufgabe zugrunde, ein gattungsgemäßes Verfahren so weiterzuentwickeln, dass dieses wirtschaftlicher angewandt werden kann. Insbesondere soll das Entkernen ohne eine erforderliche Wärmebehandlung auskommen. Zudem soll der zusätzliche Arbeitsaufwand für das Entkernen möglichst gering gehalten werden.outgoing From this prior art, the invention is therefore the task based on developing a generic method so that this can be applied more economically. In particular, should the coring without a required heat treatment get along. In addition, the additional work for the coring should be kept as low as possible.
Diese Aufgabe wird durch die Gegenstände der unabhängigen Patentansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der jeweiligen abhängigen Patentansprüche.These Task is by the objects of the independent Claims solved. Advantageous embodiments are the subject of the respective dependent claims.
Der Kern der Erfindung sieht vor, bei einem Verfahren zur Herstellung eines einen Hohlraum umfassenden Formteils, wobei ein Kernelement mit einem Kunststoffwerkstoff umschäumt wird und das Kernelement anschließend aus dem Formteil entfernt wird, das Kernelement durch Aufbringen einer Druckkraft zu zerkleinern. Demnach sieht die Erfindung vor, das Kernelement aus einem Werkstoff zu fertigen, der deutlich spröder als der Kunststoffschaum des Formteils ist, so dass durch Aufbringen einer Druckkraft das Kernelement zerkleinert wird, während der Kunststoffschaum des Formteils im wesentlichen lediglich elastisch deformiert wird. Das erfindungsgemäße Verfahren ermöglicht ein einfaches und schnelles Entkernen des Formteils, ohne dass eine Wärmebehandlung oder eine sonstige, den Kunststoffwerkstoff des Formteils potentiell schädigende Nachbehandlung erforderlich wäre.Of the Core of the invention provides, in a process for the preparation a molding comprising a cavity, wherein a core member is foamed with a plastic material and the core element subsequently removed from the molding, the core element crush by applying a compressive force. Accordingly, see the invention to manufacture the core element of a material, the significantly more brittle than the plastic foam of the molding is, so that crushed by applying a compressive force, the core element is, while the plastic foam of the molding substantially only elastically deformed. The invention Method allows easy and quick coring of the molding, without any heat treatment or a other, the plastic material of the molding potentially harmful after-treatment would be required.
In einer bevorzugten Ausführungsform der vorliegenden Erfindung besteht das Kernelement zumindest teilweise aus Polyurethan-Hartschaum (PUR-Hartschaum). Dieser Werkstoff weist die Vorteile auf, dass er gut und insbesondere kostengünstig verfügbar ist und zudem nahezu beliebig in seinen Materialkennwerten eingestellt werden kann. Folglich besteht die Möglichkeit, ein Polyurethan-Hartschaum-Kernelement herzustellen, das bereits bei relativ geringen Druckkräften pulverförmig zerfällt.In a preferred embodiment of the present invention the core element consists at least partially of rigid polyurethane foam (rigid polyurethane foam). This material has the advantages of being good and in particular cost is available and also almost arbitrary can be set in its material parameters. Consequently, there is the possibility of a rigid polyurethane foam core element produce that already at relatively low compressive forces powdery decomposes.
Insbesondere bei einem solchen Kernelement besteht daher die Möglichkeit, das erfindungsgemäß zerkleinerte Kernelement auf einfache Weise durch Absaugen oder durch Ausblasen zu entfernen.Especially with such a core element, therefore, it is possible to the core element shredded according to the invention easy to remove by suction or by blowing.
Vorzugsweise wird das Kernelement mit einem Polyurethan-Weichschaum umschäumt. Dieser Werkstoff weist ebenfalls den Vorteil auf, dass er gut und kostengünstig verfügbar ist. In Verbindung mit einem Kernelement aus einem Polyurethan-Hartschaum ist weiterhin von Vorteil, dass der Kunststoffwerkstoff des Formteils sowie des Kernelements werkstoffgleich sind. Auf diese Weise können mögliche negative Reaktionen zwischen verschiedenen Werkstoffkomponenten vermieden werden.Preferably the core element is foamed with a flexible polyurethane foam. This material also has the advantage that it is good and is available at low cost. Combined with a core element made of a rigid polyurethane foam is still advantageous that the plastic material of the molding and the Core element are the same material. That way you can possible negative reactions between different material components be avoided.
Bei der Herstellung von Bauteilen, die eine dämpfende Wirkung aufweisen, wie beispielsweise Sitzkörper aus einem Kunststoffschaum für Kraftfahrzeugsitze, ist regelmäßig vorgesehen, die Formteile nach dem Schaumprozess einer Druckbehandlung zuzuführen. Diese dient dazu, die in dem Kunststoffschaum eingeschlossenen Hohlräume aufplatzen zu lassen, so dass der Kunststoffschaum ein dämpfendes Materialverhalten erhält, wobei das dämpfende Verhalten durch das Ein- bzw. Ausströmen der Luft in die nun stellenweise aufgeplatzten Hohlräume beim Zusammendrücken bzw. Expandieren des Formteils zurückzuführen ist. Werden diese geschlossenen Hohlräume in dem Kunststoffschaum nicht zerstört, weist dieser ein eher federndes Materialverhalten auf. Wenn eine solche Bearbeitung des Kunststoffschaums ohnehin vorgesehen ist, kann auf diese Weise gleichzeitig das Kernelement zerstört werden. Ist zudem vorgesehen, die Druckbehandlung des Kunststoffschaums durch Aufbringen eines Unterdrucks durchzuführen, so kann in einem einzigen Bearbeitungsschritt sowohl ein Aufplatzen der eingeschlossenen Hohlräume in dem Kunststoffschaum, ein Zerstören des Kernelements als auch ein Absaugen des zerstörten Kernelements erfolgen. Folglich ist – sofern eine Druckbehandlung des Formteils im Rahmen einer Nachbearbeitung vorgesehen ist – das Entfernen des erfindungsgemäßen Kernelements ohne wesentlichen zusätzlichen Arbeitsaufwand möglich.In the production of components which have a damping effect, such as seat body made of a plastic foam for motor vehicle seats, is regularly provided to supply the molded parts after the foaming process of a pressure treatment. This serves to burst open the trapped in the plastic foam cavities, so that the plastic foam receives a damping material behavior, the damping behavior by the inflow or outflow of air into the now partially burst cavities during compression or expansion of the molding is due. If these closed cavities are not destroyed in the plastic foam, this has a rather resilient material behavior. If such a processing of the plastic foam is provided anyway, the core element can be destroyed in this way at the same time. If it is additionally intended to carry out the pressure treatment of the plastic foam by applying a negative pressure, the bursting of the enclosed cavities in the plastic foam, destruction of the core element as well as suction of the destroyed core element can take place in a single processing step. Consequently, if a pressure treatment of the molded part is provided as part of a post-processing - the removal of the core element according to the invention without substantial additional effort is possible.
Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The Invention is described below with reference to an illustrated in the drawings Embodiment explained in more detail.
In den Zeichnungen zeigen dieIn the drawings show the
In
den
In
das geschlossene Schaumwerkzeug wird über eine Kunststoffzuführung
Nach
dem Öffnen des zweiteiligen Schaumwerkzeugs und dem Entformen
des Formteils
Der
pulverisierte Werkstoff des Kernelements
Die
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - US 6071591 [0002, 0002] - US 6071591 [0002, 0002]
- - US 6071501 [0003] - US 6071501 [0003]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710042427 DE102007042427A1 (en) | 2007-09-06 | 2007-09-06 | Molded part producing method, involves foam coating core element with plastic material, removing core element afterwards from molded part, and shredding core element by applying compressive force |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710042427 DE102007042427A1 (en) | 2007-09-06 | 2007-09-06 | Molded part producing method, involves foam coating core element with plastic material, removing core element afterwards from molded part, and shredding core element by applying compressive force |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007042427A1 true DE102007042427A1 (en) | 2009-03-12 |
Family
ID=40339940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200710042427 Withdrawn DE102007042427A1 (en) | 2007-09-06 | 2007-09-06 | Molded part producing method, involves foam coating core element with plastic material, removing core element afterwards from molded part, and shredding core element by applying compressive force |
Country Status (1)
Country | Link |
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DE (1) | DE102007042427A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010021123A1 (en) | 2010-05-21 | 2011-11-24 | International Automotive Components Group Gmbh | Molded part such as a dashboard, a door trim or a central console for a motor vehicle, comprises an insert, and a foam body, which defines a three-dimensional viewing surface of the molded part and partially surrounds the insert |
CZ306090B6 (en) * | 2009-12-14 | 2016-08-03 | České vysoké učenà technické v Praze Fakulta strojnà | Process for producing precise foam cores in closed molds with enhanced thermal resistance and very small density |
DE102015005828A1 (en) * | 2015-05-07 | 2016-11-10 | Audi Ag | One-piece padding device for a motor vehicle and method for providing a one-piece padding device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6071501A (en) | 1999-02-05 | 2000-06-06 | The Procter & Gamble Company | Photostable UV protection compositions |
US6071591A (en) | 1996-03-29 | 2000-06-06 | Valeo Climatisation | Method for making a motor vehicle dashboard with built-in air ducts, and resulting dashboard |
-
2007
- 2007-09-06 DE DE200710042427 patent/DE102007042427A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6071591A (en) | 1996-03-29 | 2000-06-06 | Valeo Climatisation | Method for making a motor vehicle dashboard with built-in air ducts, and resulting dashboard |
US6071501A (en) | 1999-02-05 | 2000-06-06 | The Procter & Gamble Company | Photostable UV protection compositions |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ306090B6 (en) * | 2009-12-14 | 2016-08-03 | České vysoké učenà technické v Praze Fakulta strojnà | Process for producing precise foam cores in closed molds with enhanced thermal resistance and very small density |
DE102010021123A1 (en) | 2010-05-21 | 2011-11-24 | International Automotive Components Group Gmbh | Molded part such as a dashboard, a door trim or a central console for a motor vehicle, comprises an insert, and a foam body, which defines a three-dimensional viewing surface of the molded part and partially surrounds the insert |
DE102015005828A1 (en) * | 2015-05-07 | 2016-11-10 | Audi Ag | One-piece padding device for a motor vehicle and method for providing a one-piece padding device |
DE102015005828B4 (en) | 2015-05-07 | 2024-07-04 | Audi Ag | Method for providing a one-piece upholstery device of a vehicle and upholstery device |
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Legal Events
Date | Code | Title | Description |
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OR8 | Request for search as to paragraph 43 lit. 1 sentence 1 patent law | ||
R005 | Application deemed withdrawn due to failure to request examination | ||
R005 | Application deemed withdrawn due to failure to request examination |
Effective date: 20140909 |