WO2007009738A2 - Procede pour produire une piece composite de boitier sous forme de capot, de cuvette ou de couvercle, pour unite d'automobile et piece composite de boitier pour unite d'automobile ainsi obtenue - Google Patents

Procede pour produire une piece composite de boitier sous forme de capot, de cuvette ou de couvercle, pour unite d'automobile et piece composite de boitier pour unite d'automobile ainsi obtenue Download PDF

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Publication number
WO2007009738A2
WO2007009738A2 PCT/EP2006/007033 EP2006007033W WO2007009738A2 WO 2007009738 A2 WO2007009738 A2 WO 2007009738A2 EP 2006007033 W EP2006007033 W EP 2006007033W WO 2007009738 A2 WO2007009738 A2 WO 2007009738A2
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WO
WIPO (PCT)
Prior art keywords
housing
elastomer
composite part
plastic
motor vehicle
Prior art date
Application number
PCT/EP2006/007033
Other languages
German (de)
English (en)
Other versions
WO2007009738A3 (fr
Inventor
Steffen Heine
Jens Münchow
Original Assignee
Dichtungstechnik G. Bruss Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE200510033905 external-priority patent/DE102005033905A1/de
Priority claimed from DE200510033906 external-priority patent/DE102005033906A1/de
Priority claimed from DE200510033904 external-priority patent/DE102005033904A1/de
Application filed by Dichtungstechnik G. Bruss Gmbh & Co. Kg filed Critical Dichtungstechnik G. Bruss Gmbh & Co. Kg
Publication of WO2007009738A2 publication Critical patent/WO2007009738A2/fr
Publication of WO2007009738A3 publication Critical patent/WO2007009738A3/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • 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
    • B29K2621/00—Use of unspecified rubbers for preformed parts, e.g. for inserts
    • 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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • 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
    • B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
    • B29K2715/006—Glues or adhesives, e.g. hot melts or thermofusible adhesives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/0091—Oilsumps characterised by used materials

Definitions

  • the invention relates to a method for producing a hood, tub or ceiling-shaped GeHouseverbundteils for a motor vehicle unit, in particular cylinder head cover, gear cover or oil pan, according to the preamble of claim 1, and a GeHouseverbundteil for a motor vehicle unit.
  • a method for producing a cylinder head cover in which a prefabricated hood made of polyamide and a carrier made of metal are placed in an injection molding and vulcanization and then injected to form an elastomer part elastomer compound and vulcanized.
  • the disadvantage here is that the production of components made of plastics is associated with relatively large tolerances, which are many times greater than the tolerances for metal moldings and at least an order of magnitude above the required for proper manufacturing tolerances for rubber. In practice this means that
  • Plastic part can often only be forcibly inserted into the vulcanization mold. As a result, high internal stresses are impressed on the plastic part, which leads to problems in demoulding these parts from the tool and in the dimensions of the finished part, quite apart from the risk of rejects due to cracks or breaks in the plastic part.
  • thermoplastic material for molding a hood is injected through a hot runner into the tool. Subsequently, the upper part of the tool is traversed with the molding and moved to the second station.
  • the bond-treated metal part is inserted and the upper part with the plastic part is placed on the lower part of the vulcanization tool.
  • the elastomer is injected and vulcanized via a cold runner, after which the finished part is removed from the mold.
  • the combination tool must be designed so that the plastic injection molding is formed from the upper part, but the surface on which the rubber bond is to take place, is formed by the lower tool part. Since the plastic part is removed from the mold after the second and last station, problems due to the influence of different tolerances of plastic and metal parts are avoided.
  • a disadvantage of this method is the high capital outlay for two linked injection molding machines or a special machine with two injection molding stations.
  • the machine usage is not optimal because the manufacturing cycle in injection molding of plastics is much shorter than in the vulcanization of elastomer. Added to this is the extra work for the combination tool.
  • a method for producing a cylinder head cover is known from EP 860 602 B1, in which a prefabricated hood part made of plastic and a prefabricated, bond-pretreated seal are adhesively bonded.
  • a heatable adhesive device is needed to produce this cylinder head cover.
  • the adhesive bond must be oil-tight and is stressed in the power flow, which may negatively affect the service life.
  • EP 1 464 465 A1 discloses a method for producing a cylinder head cover with a hood-shaped plastic component, wherein an elastomeric seal is formed on a metallic carrier element and subsequently the plastic component is produced by molding plastic material onto the carrier element. Since the hood-shaped plastic component is connected directly to the carrier element, efficient sound decoupling between the plastic component and the unit can not be achieved. the. Dense connections between plastic and metal usually require an adhesion-promoting intermediate layer.
  • EP 0 665 370 A1 discloses a method for producing a cylinder head cover with a hood-shaped plastic component, wherein first a sealing flange made of a thermoplastic material is molded and an elastomeric seal is fastened to the sealing flange, and then the sealing flange together with the elastomer seal is placed in a separate mold and the plastic component is produced by injection molding of thermoplastic material to the sealing flange. Since the hood-shaped plastic component is directly connected to the thermoplastic sealing flange and attack the fastening means on the hood-shaped plastic component, an efficient sound decoupling between the hood-shaped plastic component and the unit can not be achieved.
  • DE 295 21 334 U1 discloses a method for producing, in particular, a plastic cylinder head cover with an integrated elastomer seal, in which a hood-like plastic component is produced by injection molding plastic material onto a preformed, optionally reinforced with a metal core elastomeric seal. A sound decoupling is not possible in this way.
  • JP 07 208261 A discloses a method for producing a cylinder head cover with an integrated elastomer seal, in which a hood-shaped plastic component is produced by injection molding of plastic material onto a preformed elastomer seal. The insertion of such a pliable seal in a mold is costly.
  • JP 63 173833 discloses a method of manufacturing a cylinder head cover having a hood-shaped polypropylene member and an elastomeric seal, in which first one of the two members is molded and then the other member is molded before the first molded member is cooled. Since the fastening means engage the hood-shaped polypropylene component, an efficient sound decoupling between the hood part and the unit can not be achieved. - A -
  • Cylinder head covers and oil pans according to the preamble of claim 8 are known from DE 197 38 276 C1 and DE 101 33 353 Al.
  • the well known from DE 101 33 353 Al oil pan includes a variety of parts and is therefore expensive to manufacture.
  • the object of the present invention is to provide a cost-effective production method for a hood, tub or ceiling-shaped housing composite part for a motor vehicle unit, in which the influence of different tolerances of the parts used is reduced or eliminated and an improved sound decoupling between the plastic parts. Housing element and the motor vehicle assembly is achieved.
  • the invention solves this problem by the means of claim 1.
  • the invention lies in a reversal of the injection molding steps for the plastic and the elastomer.
  • the fastening part is first produced with the elastomer component.
  • plastic is injected onto the elastomer element for producing the housing element. Since the plastic part is then removed from the mold, problems due to the influence of different tolerances of the housing element and the elastomer element are avoided.
  • the elastomer element Before the spraying of the plastic, the elastomer element may optionally be subjected to a technological tempering process.
  • the fastening part is not directly or directly connected to the plastic housing element, but via the sound-damping elastomer element.
  • the elastomer element therefore forms an intermediate layer between the latter and the plastic housing element essentially over the entire length of the fastening part.
  • “Substantially” means, apart from areas with functional openings, in particular for fastening the fastening part to the motor vehicle aggregate Actuate aggregate exclusively on the fastener, but not on the plastic housing element.
  • the plastic housing element is therefore preferably free of openings for fastening means, in particular screws, for fastening the housing composite part to the unit.
  • the housing element is permanently connected to the fastening element via the elastomer element.
  • Permanently connected means bonded and / or positively connected, i. in particular connected by an injection molding process.
  • elastomer is first sprayed onto a fastening part to produce the elastomeric element.
  • a prefabricated elastomer element can be connected to the fastening part by means of adhesive.
  • plastic is injected onto the elastomer element for producing the housing element. Since the plastic part is removed from the mold after the second and last station, problems due to the influence of different tolerances of housing element, elastomer element and fastening part are avoided.
  • the invention makes use of the fact that the elastomer behaves like a hydrostatic, incompressible liquid.
  • the plastic molding compound impinges on the elastomer bound to the metal, this passes on the pressure like a liquid and closes off any gaps or parting lines of the tool in the elastomer / plastic critical bonding zone with elastomer before the plastic compound can penetrate there. This allows a decidedly grateful or sometimes even essentially burr-free production without additional measures in the mold.
  • the injected hot plastic mass is highly reactive and therefore particularly bindfreudig against the elastomer element.
  • elastomeric materials that require no thermal post-treatment (Oven Post Cure) to fully develop their mechanical and chemical properties, no further measure to achieve a perfect bond to the fastener or the plastic is required.
  • OPC post-heating or tempering
  • the elastomeric element - possibly by vulcanization to the fastening part - produce, thermally post-treat this product and then to prepare the surface of the rubber for the bond elastomer / plastic.
  • the invention enables the use of conventional injection molding machines with conventional tools for injection molding and vulcanization of the elastomer element as well as for the injection molding of the housing element made of plastic.
  • the invention makes it possible to carry out annealing of the elastomer element, preferably before the plastic is sprayed on. Since the - possibly bound to the fastening part - elastomeric element is substantially smaller than the entire housing composite part, a higher filling of the furnace compared to the known methods and therefore a significant cost savings can be achieved.
  • the method can be automated because the fastening part is dimensionally stable and thus can be positioned for a robot.
  • a deformation of the plastic housing element can be avoided, since only the - possibly bonded to the fastening part - elastomeric element is annealed.
  • a preferred application of the invention relates to housing composite parts with a housing element made of a thermoplastic material.
  • the invention is also applicable to housing elements made of a thermosetting plastic.
  • the method described is very well suited for the injection of the plastic according to the TSG-V experienced (thermoplastic foam casting).
  • the injection points can be detected on the finished plastic part.
  • the elastomer component convexly deforms close to the casting close to the casting, because the injected plastic first meets close to the casting on the elastomer and then progressively on the surfaces remote from the casting.
  • An independent aspect of the present invention relates to a housing composite part for a motor vehicle unit, in particular cylinder head cover, oil pan or gear cover, according to the preamble of claim 9.
  • a housing composite part for a motor vehicle unit in particular cylinder head cover, oil pan or gear cover, according to the preamble of claim 9.
  • the object of this aspect of the present invention is to provide a simple and inexpensive to manufacture sound-insulated GeHouseverbundteil with high mechanical strength.
  • the invention achieves this object by the means of claim 9. Due to the indissoluble form overlap, the fastening part is supported on the housing part. This ensures that no unacceptably high shear or tensile stresses can occur in the binding surface of the elastomer element, which can lead to impairment or destruction of the bond.
  • Inextricable form overlap means in particular that the fastening part is held in the housing part, that only due to the formation of both components with completely removed elastomer element (and any other releasable connection means), the fastening part is not detachable without destruction of the housing part.
  • the housing composite part according to the invention is constructed using conventional methods in which a predetermined manufactured hood made of plastic and a metal support are placed in an injection molding and vulcanization and then injected to form an elastomeric part elastomer compound and vulcanized, can not be produced with portable effort.
  • the housing composite part according to the invention can only be produced with little effort by a novel production process in which first elastomer is injected onto the fastening part to produce the elastomer element, and then plastic is injected onto the elastomer element for producing the housing element.
  • the production method enabling the invention therefore lies in a reversal of the injection molding steps for the plastic and the elastomer.
  • Another independent aspect of the present invention relates to a housing composite part for a motor vehicle unit, in particular cylinder head cover, oil pan or gear cover, according to the preamble of claim 14.
  • housing composite parts as durable and resilient connection between the E lastomerelement and the housing member made of plastic is desired.
  • the object of this aspect of the present invention is to provide a simple and inexpensive to manufacture housing composite part with a durable and highly resilient connection between the elastomeric element and the housing element.
  • the invention solves this problem by the means of claim 14. Due to the positive connection between the elastomer element and the housing element, in addition to the adhesion or adhesion, overall results in a more stable and durable connection of elastomeric element and housing element.
  • the elastomeric element is held in a form-fitting manner in the cavity of the housing element in such a way that the elastomeric element can also be fitted without frictional connection, i. with thought out frictional, is only removable under deformation from the cavity.
  • the housing composite part according to the invention can be produced with conventional methods only with increased effort, since the injection mold for the plastic is not readily available can be removed from the cavity.
  • the housing composite part according to the invention can only be produced by a novel production method with little effort, in which plastic is injected onto the prefabricated elastomer element for the production of the housing element.
  • the production method enabling the invention therefore lies in a reversal of the injection molding steps for the plastic and the elastomer.
  • One-side open cavity means that the cavity is open to one side, but otherwise substantially closed, such as a groove or a
  • a blind hole The term unilaterally open cavity is thereby delimited from passage openings, in particular for fastening screws for fastening the housing composite part to the motor vehicle assembly.
  • the housing composite part according to the invention is thus delimited, for example, from clip connections between the housing element and the elastomer element.
  • FIG. 1 shows a flow chart of a method according to a first preferred embodiment of the invention, in particular when processing elastomers which require a thermal after-treatment;
  • FIG. 2 shows a flowchart of a method according to a second preferred embodiment of the invention, in particular when processing elastomers which do not require any thermal aftertreatment
  • FIG. 3 shows a cross-sectional view of an intermediate product after step S21 or S32 in the method according to FIG. 1 or FIG. 2;
  • FIG. 1 shows a flowchart of a method according to a second preferred embodiment of the invention, in particular when processing elastomers which do not require any thermal aftertreatment
  • FIG. 3 shows a cross-sectional view of an intermediate product after step S21 or S32 in the method according to FIG. 1 or FIG. 2;
  • Fig. 4 is a cross-sectional view of the final product in the process of Fig. 1 and Fig. 2, respectively;
  • FIG. 5 shows a section of FIG. 4 in the region of the seal
  • FIG. 7 shows a cross-sectional view of a cylinder head cover in the cutout in the region of the elastomer element
  • Fig. 13 is a spring characteristic diagram of the elastomeric element.
  • a housing composite part for a motor vehicle assembly such as the cylinder head cover 11 shown in FIG. 4 made of a metal-plastic-elastomer composite with a closure cap 15 made of thermoplastic material and an integrated elastomeric seal 12.
  • the thermal load Such cylinder head covers are very high, they can take temperatures up to 130 ° C, the splash oil inside may have peaks of 150 ° C and the temperatures of the bearing surface on the cylinder head for the seal may be even higher on the outlet side of the engine.
  • the cylinder head cover 11 is mounted by means of the fastening part 10, which has holes 13 for this purpose, to the unit, not shown.
  • the fastening part 10 can also be referred to as a frame. With the housing composite part 11, a corresponding opening in the housing of the unit is sealed sealing and sound-absorbing.
  • an adhesion-promoting intermediate layer is first applied to the prefabricated fastening part 10 in step S20 in order to provide a high-strength bond between the elastomer and the fastening part to reach.
  • the fastening part 10 has in many cases preferably in the form of a closed or substantially closed frame.
  • substantially closed means that the frame can be interrupted in sections, if this is structurally required or advantageous.
  • the fastening part 10 may for example also consist of one or more strips.
  • the fastening part expediently has sufficient rigidity.
  • the fastening part 10 therefore preferably consists of a sufficiently strong material, in particular metal, solid or reinforced plastic, or the like.
  • step S 21 the fastening part 10 is inserted into the tool of a first injection molding machine and an elastomer layer is sprayed onto the fastening part 10 and vulcanized to form the elastomeric seal 12.
  • the intermediate part 14 may be annealed in an oven (step Oven Post Cure process) in step S22 to achieve the required formation of the thermal and chemical resistance and mechanical strength of the elastomeric gasket.
  • the intermediate part 14 is considerably smaller volume than the final product 11. It can therefore in comparison to the prior art, in which the entire end product must be brought into the oven for annealing the elastomeric gasket, a significantly higher filling of the furnace and therefore a significant cost savings can be achieved.
  • the Schenteil 14 preferably has no component made of plastic, a deformation of the intermediate part 14 is avoided during annealing.
  • step S22 The annealing of the intermediate part in step S22 is by no means absolutely necessary.
  • the process according to FIG. 1 is readily suitable for processing elastomers which do not require any thermal aftertreatment.
  • thermoplastic material to be sprayed on and the elastomeric seal 12 it can be bond-pretreated in the optional step S23.
  • step S24 the intermediate part 14 is inserted into a second mold of a second injection molding machine and a thermoplastic resin mass for forming the hood part 15 and thus of the composite part 11 is injected. Subsequently, the hood part 15 is removed from the mold in step S25.
  • the first and second injection molding machines may be conventional injection molding machines with conventional molding tools.
  • the invention is not limited thereto.
  • step S30 the fastening part 10, optionally provided with an adhesion-promoting intermediate layer, is inserted into the lower part of a special molding tool, and in step S31 the mold is closed by a first upper part.
  • step S32 in the first injection molding station of the injection molding machine, the bonding elastomer layer is injected and vulcanized to form the elastomeric seal 12.
  • step S33 the lower mold part with the fastening part 10 and the elastomer layer 12 bonded thereon is moved from the first injection molding station to the second injection molding station, and in step S34 the tool lower part is closed by placing a second upper part.
  • step S34 thermoplastic material for molding the housing element 15 is injected into the second injection molding station and the finished composite part 11 is removed from the mold in step S36.
  • This alternative method is preferably used in the processing of elastomers that do not require thermal post-treatment (OPC). Of course, if necessary, the finished composite part can subsequently be tempered.
  • OPC thermal post-treatment
  • thermoplastic material for forming the housing member 15 can be carried out by means of a thermoplastic foam-casting process.
  • the housing element 15 may in particular have the form of a hood, a lid, a tub or the like.
  • the housing element 15 is connected to the fastening part 10 only via the elastomer element 12, ie it is not in direct contact with the fastening part 10 at any point.
  • the above exemplary embodiments relate to housing composite parts in which the housing element is permanently connected to a fastening part 10 via the elastomer element 12.
  • the method of the invention is not limited thereto. It may, for example, also for producing a housing composite part - possibly without the above attachment part - serve, wherein the housing member has a unilaterally open cavity in which the elastomeric element is at least partially received, wherein the cavity is shaped so that the elastomeric element in the cavity force - And positively held. This will be described below.
  • the elastomeric element 12 is permanently connected to the housing element 15 and the fastening part 10.
  • Fastening means, not shown, for fastening the housing composite part 1 1 to the motor vehicle assembly preferably engage exclusively on the fastening part 10, but not on the housing element 15, in order to improve the decoupling of structure-borne noise.
  • the fastening part 10 therefore has through bores 13 for corresponding fastening means, in particular screws, while the housing element 15 is preferably free of through-holes for fastening screws for fastening the housing composite part 1 1 to the motor vehicle assembly.
  • the bores 13 may be provided with corresponding elastomeric buffer elements 33 on the fastening part 10, which may be integrally formed with the elastomer element 12.
  • the fastening part can be additionally used stiffening in the engine-transmission-composite.
  • the oil pan which is not completely shown, is constructed analogously to the cylinder head cover 11 shown in FIG. 4.
  • the frame-shaped fastening part 10 is formed circumferentially around the opening of the oil pan.
  • the particular metallic frame 10 can be made for example as a drawing or punching part of sheet steel.
  • At the outer edge of the frame 10 may be stiffened by an angled portion 16 on the inner edge by a bend 17.
  • At the inner edge of the frame has a further bend 18.
  • the housing part 15 has a recess or a cavity 20.
  • the recess or cavity 20 forms an undercut 19.
  • the main direction R designates a direction perpendicular to the imaginary parting surface between the housing composite part 11 and the motor vehicle unit.
  • the frame 10 engages in the recess 20, in Fig. 6, for example by means of the horizontal bend 18.
  • the recess 20 is substantially completely filled with elastomer. Due to the undercut 19 there is a positive Overlapping a between the fastening part 10 and the housing part 15. Therefore, even with the elastomer element 15 removed, the fastening part 10 can not be separated from the housing element 15 without deformation. Because of this permanent mold overlap, the fastening part 10 is supported on the undercut 19 of the housing element 15 and expediently on the opposite wall 34 of the recess 20.
  • the spring stiffness of the rubber spring formed by the elastomer element 12 is shown in FIG. Accordingly, the spring stiffness preferably proceeds progressively in the direction of the force, i. the spring is relatively soft around the static zero point with increasing stiffness in both directions.
  • the desired spring rigidity can be influenced by varying suitable dimensions, in particular the distances between the fastening part 10 and the housing part 15 in the region of the recess 20 (dimensions "b", “c” and “d” in FIG the spring characteristic substantially characterized by a shear stress, which is due to the support of the fastening part 10 on the walls 19, 34 superimposed with increasing pressure, so that even with sudden load, for example in sloshing oil filling no overloading of the elastomer element 15 and the bond occurs.
  • FIGS. 14 to 18 in conjunction with FIGS. 3 and 4.
  • Fig. 17 shows the cylinder head cover 11 of Fig. 4 in the region of the elastomeric element 12.
  • the frame-shaped fastening part 10 is formed circumferentially around the cylinder head opening of the motor vehicle assembly.
  • the particular metallic frame 10 can be made, for example, as a drawn or stamped steel sheet.
  • the frame preferably has a further bend 18.
  • the housing element 15 has a recess or a cavity in the form of a circumferential groove 20 which are formed by side walls 21, 22 and a bottom wall 23 of the housing element 15. At the bottom wall 23 opposite side of the cavity 20, the opening 24 is formed. Apart from the opening 24, the groove is closed. Along the longitudinal sides of the groove 20, webs 35, 36 narrow the groove opening 24. The webs 35, 36 are part of the housing element 15. By the webs 35, 36, in the cavity 20, viewed from the opening direction S, undercuts 37, 38 formed. The opening direction designates a direction perpendicular to the opening 24 of the cavity 20 with a view into the cavity 20.
  • the recess 20 is filled with elastomer, so that the elastomer element 12 is held in a form-fitting manner in the cavity 20 of the housing element 15 due to the undercuts 37, 38 and can only be separated from the housing element 15 with destruction.
  • undercuts 27 to 30 forming webs 25, 26, 31, 32 are arranged in the side walls 21, 22 of the groove 20.
  • a plurality of webs 25, 31 and 26, 32 are arranged, for example in the form of a corrugated structure, whereby the holding force of the elastomer element 12 is further increased in the groove 20.
  • a metallic frame-shaped fastening part 10 in particular, is provided.
  • fasteners not shown, for attaching the housing composite part 1 1 engage the motor vehicle assembly exclusively on the fastening part 10, but not on the housing member 15 in order to improve the decoupling of structure-borne noise.
  • the fastening part 10 therefore has through holes 13 for corresponding fastening means, in particular screws, while the housing element 15 is preferably free of through-holes for fastening screws for fastening the housing composite part 11 to the motor vehicle assembly.
  • the fastening part 10 preferably engages in the cavity 20 in order to reinforce the connection and, if appropriate, for support on the housing element 15.
  • the embodiment according to FIG. 16 illustrates that, however, this is by no means absolutely the case.
  • FIG. 15 clarifies that the invention can also be applied to housing composite parts with integrated elastomer element 12 without holding or fastening part 10.
  • the housing member 15 is mounted on the motor vehicle assembly and may for this purpose have through holes for fasteners, not shown.
  • FIG. 18 illustrates that an undercut can also be formed by a side wall 21 of the housing element 15 forming the groove 20.
  • a free space 39 not occupied by the elastomer element can preferably be provided in order to allow yielding of the elastomer element 12.
  • the housing element 15 may in particular have the form of a hood, a lid, a tub or the like.
  • the housing element 15 is connected to decoupling the structure-borne noise only via the elastomer element 12 with the fastening part 10, ie it is not directly in contact with the fastening part 10 at any point.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • General Details Of Gearings (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un procédé permettant de produire une pièce composite de boîtier (11) sous forme de capot, de cuvette ou de couvercle, pour unité d'automobile, notamment un couvre-culasse, un couvercle de boîte de vitesses ou de cuvette à huile, comprenant un élément de boîtier (15) à base de matière plastique et un élément élastomère (12) intégré, à effet d'étanchéité et d'amortissement du bruit. Ledit élément élastomère (12) est solidarisé de manière durable avec l'élément de boîtier (15) et l'élément de boîtier (15) est solidarisé de manière durable, par l'intermédiaire de l'élément élastomère (12), avec une pièce de fixation (10) sous forme de cadre, pour fixer la pièce composite de boîtier sur l'unité d'automobile. Ledit procédé se caractérise en ce que pour produire l'élément de boîtier (15), de la matière plastique est pulvérisée sur l'élément élastomère (12) préfabriqué. L'invention concerne également une pièce composite de boîtier pour unité d'automobile.
PCT/EP2006/007033 2005-07-15 2006-07-14 Procede pour produire une piece composite de boitier sous forme de capot, de cuvette ou de couvercle, pour unite d'automobile et piece composite de boitier pour unite d'automobile ainsi obtenue WO2007009738A2 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102005033905.0 2005-07-15
DE102005033906.9 2005-07-15
DE200510033905 DE102005033905A1 (de) 2005-07-15 2005-07-15 Verfahren zum Herstellen eines Gehäuseverbundteils für ein Kraftfahrzeugaggregat
DE200510033906 DE102005033906A1 (de) 2005-07-15 2005-07-15 Gehäuseverbundteil für ein Kraftfahrzeugaggregat
DE200510033904 DE102005033904A1 (de) 2005-07-15 2005-07-15 Gehäuseverbundteil für ein Kraftfahrzeugaggregat
DE102005033904.2 2005-07-15

Publications (2)

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WO2007009738A2 true WO2007009738A2 (fr) 2007-01-25
WO2007009738A3 WO2007009738A3 (fr) 2007-06-28

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PCT/EP2006/007033 WO2007009738A2 (fr) 2005-07-15 2006-07-14 Procede pour produire une piece composite de boitier sous forme de capot, de cuvette ou de couvercle, pour unite d'automobile et piece composite de boitier pour unite d'automobile ainsi obtenue

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9635928B2 (en) 2012-11-05 2017-05-02 The Procter & Gamble Company Toothbrush comprising elastomeric cleaning elements over-molded with a harder plastic and method for producing the same
DE102015224535A1 (de) * 2015-12-08 2017-06-08 Robert Bosch Gmbh Getriebeantriebseinrichtung

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JPH07208261A (ja) * 1994-01-26 1995-08-08 Kinugawa Rubber Ind Co Ltd シリンダヘッドカバーの成形方法
DE29521334U1 (de) * 1995-10-27 1997-03-06 Elring Klinger GmbH, 72581 Dettingen Maschinenbauteil mit einer Dichtung
DE10119892A1 (de) * 2001-04-24 2002-11-07 Skf Ab Deckel, insbesondere zur Dämpfung des Geräusches eines Verbrennungsmotors, und Verfahren zur Herstellung des Deckels
WO2003089772A1 (fr) * 2002-04-19 2003-10-30 Federal-Mogul Sealing Systems Bretten Gmbh & Co. Kg Procede de fabrication d'un couvercle de carter
EP1464465A1 (fr) * 2003-03-28 2004-10-06 Federal-Mogul Sealing Systems Bretten GmbH & Co. KG Procédé de fabrication d'une pièce en plastique avec un joint d'étancheité et pièce en plastique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07208261A (ja) * 1994-01-26 1995-08-08 Kinugawa Rubber Ind Co Ltd シリンダヘッドカバーの成形方法
DE29521334U1 (de) * 1995-10-27 1997-03-06 Elring Klinger GmbH, 72581 Dettingen Maschinenbauteil mit einer Dichtung
DE10119892A1 (de) * 2001-04-24 2002-11-07 Skf Ab Deckel, insbesondere zur Dämpfung des Geräusches eines Verbrennungsmotors, und Verfahren zur Herstellung des Deckels
WO2003089772A1 (fr) * 2002-04-19 2003-10-30 Federal-Mogul Sealing Systems Bretten Gmbh & Co. Kg Procede de fabrication d'un couvercle de carter
EP1464465A1 (fr) * 2003-03-28 2004-10-06 Federal-Mogul Sealing Systems Bretten GmbH & Co. KG Procédé de fabrication d'une pièce en plastique avec un joint d'étancheité et pièce en plastique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9635928B2 (en) 2012-11-05 2017-05-02 The Procter & Gamble Company Toothbrush comprising elastomeric cleaning elements over-molded with a harder plastic and method for producing the same
DE102015224535A1 (de) * 2015-12-08 2017-06-08 Robert Bosch Gmbh Getriebeantriebseinrichtung

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