DE102010022778A1 - Method for producing a noise protection device made of plastic by means of blown extrusion - Google Patents
Method for producing a noise protection device made of plastic by means of blown extrusion Download PDFInfo
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- DE102010022778A1 DE102010022778A1 DE102010022778A DE102010022778A DE102010022778A1 DE 102010022778 A1 DE102010022778 A1 DE 102010022778A1 DE 102010022778 A DE102010022778 A DE 102010022778A DE 102010022778 A DE102010022778 A DE 102010022778A DE 102010022778 A1 DE102010022778 A1 DE 102010022778A1
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- wall
- holes
- protection device
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- noise protection
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- 238000001125 extrusion Methods 0.000 title claims abstract description 12
- 239000004033 plastic Substances 0.000 title claims description 18
- 229920003023 plastic Polymers 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000013016 damping Methods 0.000 claims abstract description 7
- 239000011521 glass Substances 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000003466 welding Methods 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1277—Reinforcement of walls, e.g. with ribs or laminates; Walls having air gaps or additional sound damping layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1283—Manufacturing or assembly; Connectors; Fixations
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0045—Perforating
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Verfahren zur Herstellung einer Lärmschutzvorrichtung mittels Blasextrusion, gekennzeichnet durch folgende Phasen: – während der Extrusionsphase wird ein doppelwandiger Vorformling (1) geformt, der eine Außenwand (2) und eine Innenwand (3) aufweist, – während der Glasphase wird ein rohrförmiger Resonanzkörper (4) geformt, der mindestens einen erweiterten Abschnitt (5) aufweist, der die beiden Seitensegmente (51, 52) voneinander trennt, – eine Gruppe von durchgehenden Dämpfungsbohrungen (9) wird in eifern ersten Seitensegment (51) gebohrt, und – die Innenwand (3) des Resonanzkörpers (4) wird von der Außenwand (2) abgetrennt, danach wird sie so gefaltet, dass die Bohrungen (9) dem erweiterten Abschnitt (5) gegenüberliegen.Process for producing a noise protection device by means of bubble extrusion, characterized by the following phases: - a double-walled preform (1) is formed during the extrusion phase, which has an outer wall (2) and an inner wall (3), - during the glass phase, a tubular resonance body (4 ) which has at least one enlarged section (5) which separates the two side segments (51, 52) from one another, - a group of continuous damping bores (9) is drilled in a first side segment (51), and - the inner wall (3rd ) of the resonance body (4) is separated from the outer wall (2), then it is folded so that the bores (9) are opposite the enlarged section (5).
Description
Technisches GebietTechnical area
Gegenstand der vorliegenden Erfindung ist ein eine Lärmschutzvorrichtung und ein Verfahren zur Herstellung einer Lärmschutzvorrichtung mittels Blasextrusion z. B. für das Ansaugsystem eines Verbrennungsmotors, z. B. für ein Kraftfahrzeug.The present invention is a noise protection device and a method for producing a noise protection device by means of bubble extrusion z. B. for the intake system of an internal combustion engine, for. B. for a motor vehicle.
Stand der TechnikState of the art
Die Automobilhersteller sind bestrebt, die von den Verbrennungsmotoren ihrer Autos ausgehende Lärmbelastung zu verringern; deshalb statten sie üblicherweise den Lufteinlass dieser Motoren mit Lärmschutzvorrichtungen, Schalldämpfern, aus, die in diesem Bereich die Lärmemission reduzieren sollen.Automobile manufacturers strive to reduce the noise pollution from their cars' internal combustion engines; therefore, they usually provide the air intake of these engines with noise barriers, mufflers, designed to reduce noise emissions in this area.
Derartige Vorrichtungen können aus mehreren unterschiedlichen Elementen bestehen, die mittels Spritzgießen oder Blasextrusion separat geformt werden müssen, um dann in mehreren Schweißphasen zusammengesetzt zu werden.Such devices may consist of several different elements which must be molded separately by means of injection molding or blown extrusion in order then to be assembled in several welding phases.
Diese Lärmschutzvorrichtungen sind daher häufig aufwändig in der Fertigung und deshalb kostspielig.These noise protection devices are therefore often expensive to manufacture and therefore expensive.
Offenbarung der ErfindungDisclosure of the invention
Gegenstand der vorliegenden Erfindung ist es, diese Nachteile zu beseitigen, indem eine Lärmschutzvorrichtung vorgeschlagen wird, die aus einem einzigen Kunststoffelement besteht, das mittels Blasextrusion hergestellt werden kann.The object of the present invention is to eliminate these disadvantages by proposing a noise protection device consisting of a single plastic element which can be manufactured by means of blow extrusion.
Die Erfindung betrifft deshalb ein Verfahren zur Herstellung einer Lärmschutzvorrichtung aus Kunststoff mittels Blasextrusion sowie eine derartig hergestellte Lärmschutzvorrichtung. Die Herstellung kann für verschiedene Arten von Lärmschutzvorrichtungen eingesetzt werden. Häufig werden derartige Lärmschutzvorrichtungen auch als Schalldämpfer bezeichnet.The invention therefore relates to a method for producing a noise protection device made of plastic by means of bubble extrusion and a noise protection device produced in this way. The manufacture can be used for various types of noise protection devices. Frequently, such noise protection devices are also referred to as silencers.
Die Blasextrusion ist eine dem Fachmann bekannte Technik zur Herstellung von Hohlkörpern aus thermoplastischen Materialien.Blown extrusion is a technique known to those skilled in the art for producing hollow bodies from thermoplastic materials.
Gemäß dieser Technik wird in einer ersten Phase oder Extrusionsphase ein Kunststoffrohr, genannt Vorformling, in geschmolzenem Zustand extrudiert, und in einer zweiten Phase oder Glasphase wird dieser Vorformling in eine geschlossene Gießform eingeführt und Luft eingeblasen, um den Vorformling gegen die abgekühlten Wände der Gießform zu drücken und ihn so in seine gewünschte Form zu bringen.According to this technique, in a first phase or extrusion phase, a plastic tube called a preform is extruded in a molten state, and in a second phase or glass phase, this preform is introduced into a closed mold and air is blown in to force the preform against the cooled walls of the mold Press and bring it to its desired shape.
Das verfestigte Teil wird dann ausgeformt und der überschüssige Kunststoff abgeschnitten, um so das endgültige Teil zu erhalten.The solidified part is then molded and the excess plastic cut off to obtain the final part.
Die Erfindung ermöglicht es, eine derartige Technik für die Herstellung von Lärmschutzvorrichtungen zu realisieren und zu adaptieren.The invention makes it possible to implement and adapt such a technique for the production of noise protection devices.
Die erste Phase des erfindungsgemäßen Verfahrens besteht darin, während der Extrusionsphase einen doppelwandigen Vorformling zu formen, der eine Außenwand aus einem ersten, im Wesentlichen starren Kunststoff und eine Innenwand aus einem zweiten, im Wesentlichen weichen Kunststoff aufweist. Insbesondere ist der abgekühlte Kunststoff der Außenwand starrer als der abgekühlte Kunststoff der Innenwand. Ein derartiges Verfahren wird auch als Koextrusion bezeichnet.The first phase of the process according to the invention is to form a double-walled preform during the extrusion phase, which has an outer wall made of a first, substantially rigid plastic and an inner wall of a second, substantially soft plastic. In particular, the cooled plastic of the outer wall is more rigid than the cooled plastic of the inner wall. Such a method is also called coextrusion.
Für die Erfindung müssen die beiden Kunststoffe untereinander chemisch insoweit unverträglich sind, als – wie weiter unten im Detail beschrieben – sowohl die Innenwand als auch die Außenwand später teilweise voneinander getrennt werden müssen.For the invention, the two plastics are chemically incompatible with each other so far, as - as described in detail below - both the inner wall and the outer wall must later be partially separated from each other.
Die zweite Phase des erfindungsgemäßen Verfahrens besteht darin, während der Glasphase den während der ersten Phase erhaltenen doppelwandigen Vorformling in eine geschlossene Gießform einzuführen und Luft einzublasen, um so einen rohrförmigen Resonanzkörper zu erhalten, der mindestens einen erweiterten Abschnitt aufweist, der zwei Seitensegmente voneinander trennt.The second phase of the process of the invention is to introduce the double-walled preform obtained during the first phase into a closed mold during the glass phase and to blow air so as to obtain a tubular resonator having at least one extended portion separating two side segments.
Die folgende Phase des erfindungsgemäßen Verfahrens besteht darin, in einem der Seitensegmente oder dem ersten Seitensegment des Resonanzkörpers eine Gruppe von durchgehenden Dämpfungsbohrungen zu bohren. Bohren steht in diesem Zusammenhang stellvertretend für eine Reihe von Verfahren zum Erzeugen von Löchern. So können die Löcher z. B. auch gestanzt, gefräst, gepresst, gestochen, geschmolzen oder auf eine andere Art erzeugt werden. Bohrung steht für die erzeugten Löcher.The following phase of the method according to the invention consists in drilling a group of continuous damping bores in one of the side segments or the first side segment of the resonance body. Drilling in this context is representative of a number of methods for creating holes. So the holes z. B. also punched, milled, pressed, stung, melted or produced in any other way. Bore stands for the holes created.
Derartige Dämpfungsbohrungen sind vorteilhafterweise gleichmäßig über den Außenbereich des Resonanzkörpers verteilt, so dass dieser vollkommen symmetrisch im Verhältnis zu seiner Mittelachse ist.Such damping bores are advantageously uniformly distributed over the outer region of the resonance body, so that it is perfectly symmetrical in relation to its central axis.
Es sei darauf hingewiesen, dass erfindungsgemäß die Bohrphase der Dämpfungsbohrungen entweder in der Gießform während der Glasphase oder mittels eines geeigneten Werkzeugs nach dem Ausformen des Resonanzkörpers durchgeführt werden kann.It should be noted that, according to the invention, the drilling phase of the damping bores can be carried out either in the casting mold during the glass phase or by means of a suitable tool after the shaping of the resonance body.
Die folgende Phase des erfindungsgemäßen Verfahrens besteht darin, im Bereich des ersten Seitensegmentes die Innenwand des Resonanzkörpers durch ”Abziehen” von seiner Außenwand abzutrennen, um dann die so im Resonanzkörper abgetrennte Innenwand zum zweiten Seitensegment hin so zu falten, dass die Dämpfungsbohrungen dem erweiterten Mittelabschnitt gegenüberliegen. The following phase of the method according to the invention consists in separating the inner wall of the resonator body from its outer wall in the area of the first side segment so as to fold the inner wall thus separated in the resonator body towards the second side segment so that the damping bores face the extended middle section ,
Mittels dieser Phase erhält man im Mittelteil des Resonanzkörpers einen zentral angeordneten Kanal aus dem zweiten, im Wesentlichen weichen Kunststoff und umgeben von einer ringförmigen Resonanzkammer.By means of this phase is obtained in the central part of the resonator a centrally disposed channel of the second, substantially soft plastic and surrounded by an annular resonance chamber.
Diese ringförmige Resonanzkammer kommuniziert mit dem Kanal über die Bohrungen und begrenzt so ein Resonanzelement, das geeignet ist, eine wirksame Dämpfung der Lärmemissionen zu erreichen.This annular resonance chamber communicates with the channel via the bores and thus delimits a resonance element which is suitable for achieving effective damping of the noise emissions.
Die letzte Phase des erfindungsgemäßen Verfahrens besteht darin, das Endstück der Außenwand vom ersten Seitensegment des mit Bohrungen versehenen Resonanzkörpers abzuschneiden und zu entfernen.The last phase of the method according to the invention is to cut off and remove the end piece of the outer wall from the first side segment of the bore-provided resonating body.
Die so erhaltene Resonanzvorrichtung kann mittels ihrer Endstücke an einem Einlassrohr und einem Auslassrohr angeschlossen werden, und zwar mittels beliebiger bekannter Anschlussteile.The resonance device thus obtained can be connected by means of its end pieces to an inlet pipe and an outlet pipe, by means of any known connection parts.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Merkmale des Verfahrens, das Gegenstand der Erfindung ist, werden detaillierter erklärt unter Bezugnahme auf die nicht einschränkenden, beigefügten Zeichnungen, in denen:The features of the method which is the subject of the invention will be explained in more detail with reference to the non-limiting attached drawings, in which:
die
Ausführungsform(en) der ErfindungEmbodiment (s) of the invention
Gemäß
Gemäß
Gemäß
Gemäß
Gemäß
Auf diese Art und Weise erhält man die in
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0953656A FR2946278B1 (en) | 2009-06-03 | 2009-06-03 | METHOD FOR MANUFACTURING ACOUSTIC DEVICE OF PLASTIC MATERIAL BY EXTRUSION BLOWING |
FR0953656 | 2010-06-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102010022778A1 true DE102010022778A1 (en) | 2011-12-08 |
DE102010022778B4 DE102010022778B4 (en) | 2013-05-23 |
Family
ID=41582113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102010022778A Expired - Fee Related DE102010022778B4 (en) | 2009-06-03 | 2010-06-04 | Noise protection device and method for producing a noise protection device made of plastic by means of blow extrusion |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102010022778B4 (en) |
FR (1) | FR2946278B1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6183020A (en) * | 1984-09-28 | 1986-04-26 | Tsuchiya Mfg Co Ltd | Manufacture of resonance type muffler of synthetic resin |
DE4011705A1 (en) * | 1990-04-11 | 1991-10-17 | Freudenberg Carl Fa | AIR SOUND ABSORBING MOLDED PART |
JP3143752B2 (en) * | 1991-06-05 | 2001-03-07 | 本田技研工業株式会社 | Method and apparatus for blow molding resonator case |
FR2738180B1 (en) * | 1995-08-30 | 1997-10-31 | Hutchinson | METHOD FOR MANUFACTURING A PLASTIC PRODUCT BY EXTRUSION-BLOWING IN THREE DIMENSIONS |
JP3841912B2 (en) * | 1997-02-21 | 2006-11-08 | 株式会社イノアックコーポレーション | Intake pipe with silencing function and method of manufacturing the same |
US20050150718A1 (en) * | 2004-01-09 | 2005-07-14 | Knight Jessie A. | Resonator with retention ribs |
DE202007017661U1 (en) * | 2007-12-18 | 2008-03-13 | Odenwald Chemie Gmbh | Acoustic silencer for internal combustion engines |
-
2009
- 2009-06-03 FR FR0953656A patent/FR2946278B1/en not_active Expired - Fee Related
-
2010
- 2010-06-04 DE DE102010022778A patent/DE102010022778B4/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2946278A1 (en) | 2010-12-10 |
DE102010022778B4 (en) | 2013-05-23 |
FR2946278B1 (en) | 2011-06-17 |
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