Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/50—Multilayers
  • B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating
• • 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
  • B29C45/14311—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 using means for bonding the coating to the 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
  • 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
  • B29C45/1418—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 inserts being deformed or preformed, e.g. by the injection pressure
  • B29C2045/14213—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 inserts being deformed or preformed, e.g. by the injection pressure deforming by gas or fluid pressure in the mould cavity
• • 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
  • B29C45/1418—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 inserts being deformed or preformed, e.g. by the injection pressure
  • B29C2045/14237—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 inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
• • 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
  • 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
  • B29L2031/3002—Superstructures characterized by combining metal and plastics, i.e. hybrid parts

Definitions

• the invention relates to a metallic carrier component having a composite adhesion surface for a polymer structure to be sprayed on and a corresponding hybrid component comprising the carrier component and the molded polymer structure. Furthermore, methods are disclosed for producing, on the one hand, the metallic carrier component and, on the other hand, the hybrid component.
• a polymer structure is often inserted into a metal component by means of injection molding in order to provide the component with comparatively low weight, an improved torsional and
• Such hybrid components are used, for example, in vehicle construction as load-bearing parts or force-absorbing parts with subordinate visual requirements.
• Expansion coefficients of the materials used lead to a softening between metal component and polymer structure, so that the desired mechanical properties are not achieved.
• the bonding of the molded plastic component to the metallic support component is low due to different chemical and physical properties of the two component materials.
• the adhesion between the metal component and the polymer structure can be improved by a primer layer.
• hot melt adhesives based on co-polyamide can be used.
• EP 1 808 468 B1 describes the use of reactive hotmelt adhesives in hybrid components.
• a process for the production of hybrid components from metals and polymers is disclosed, in which the metals with the polymers by Co-polyamide-based hot melt adhesives are added, which additionally contain isocyanate and epoxide.
• a correspondingly improved hybrid component with improved adhesion between metallic carrier component and polymer structure and therefore with improved
• the metallic carrier component according to the invention with a composite adhesion surface for a polymer structure to be sprayed, which is present on at least one surface section of the metallic carrier component, has one on the metallic one
• Conversion layer applied primer layer is formed on the metallic support component, which fulfills the high automotive requirements for function, process and environment and thus combines best adhesion properties with ease of manufacture.
• the conversion layer is not only the Improved connection of the primer layer to the metallic carrier, but also created an increased corrosion protection.
• the metallic support member may be a final molded component, such as a die cast component, or a semi-finished metal product, a sheet, a pipe or a profile; it can do that
• the metallic carrier component may also be a steel component or a semi-finished steel product.
• a co-polyamide is suitable; well known are those under the mark
• VESTAMELT ® advertised primer products such as VESTAMELT® X 1333 from Evonik. These adhesion promoters VESTAMELT® offer by closed isocyanate chains the possibility of processing as a paint or powder, at the same time high binding energy to be sprayed polymer, especially polyamide.
• the conversion layer may be a wet-chemically generated conversion layer;
• Such conversion coatings can 400 (Messrs. Henkel, Germany) are prepared with the products of brands Alodine® 4595, Alodine ® 2040 Alodine ®.
• a green-chromate conversion layer which can be produced in an Al support component, for example, with ALFIPAS® 731 from AluFinish.
• Composite adhesion surface may be formed by molding a polymer structure
• a suitable polymer structure may be a thermoplastic polymer structure, preferably a polyamide structure.
• the hybrid component is suitable as a motor vehicle component, in particular as a
• the method according to the invention for producing a metallic carrier component with a composite adhesion surface as outlined above comprises first of all that the composite adhesion surface is formed from a conversion layer and a primer layer. First, the conversion layer on the metallic
• Carrier component surface generated and then applied the primer on the conversion layer.
• a metallic carrier component is created which is processed for an adhesion-promoting and durable bond with a polymer structure. Both the conversion layer and the primer layer contribute to improved corrosion protection of the metallic support component.
• the application of the primer can be done by powder coating such as by electrostatic powder coating and include a heat treatment. Alternatively, it may preferably be achieved by applying a solution containing the primer through a
• the generation of the conversion layer can be carried out wet-chemically by dipping or spraying, preferably in several dipping or spraying steps; wet chemical pretreatment can be carried out with Alodine 4595 ®, Alodine ® 2040 or Alodine ® 400th
• wet chemical pretreatment can be carried out with Alodine 4595 ®, Alodine ® 2040 or Alodine ® 400th
• the possible alternative Grünchromatieren can be done for example with ALFIPAS ® 731st
• the surface on which the composite adhesion surface is formed should be cleaned, degreased and / or freed from an oxide layer prior to generating the conversion layer.
• the method for producing a hybrid component according to the invention comprises the steps:
• the manufacture of the hybrid component may involve forming, deforming or bending the metallic support member with the composite adhesive layer system prior to
• Injection molding preferably to form a hollow profile.
• the shaping can also be achieved by hydraulically shaping the metallic carrier formed to form the hollow profile by means of a hydroforming process
• the invention relates to the production of a metallic carrier component with a composite adhesion surface for a polymer structure to be sprayed and further to a corresponding hybrid component of the metallic carrier component with an at least locally surrounding injection-molded component.
• a polymer preferably a thermoplastic injection-molded to the metallic
• Carrier component which consists of steel or preferably of a light metal such as aluminum or magnesium, molded geometry. This is to create a permanent bond between the metal surface and the plastic. This is between
• Thermoplastics including in particular polyamides, and metals due to the chemical properties without pretreatment not possible.
• the composite adhesion layer system according to the invention is applied to the metallic support component, which may be a component or semifinished product, which consists of an adhesion promoter or primer and a conversion layer preparing the adhesion primer for the primer.
• the first step in the preparation of the composite adhesion layer system is thus the chemical pretreatment of the metallic support component surface to produce the conversion layer, as outlined in the figure.
• the metallic support component which may be a component or semifinished product, which consists of an adhesion promoter or primer and a conversion layer preparing the adhesion primer for the primer.
• the first step in the preparation of the composite adhesion layer system is thus the chemical pretreatment of the metallic support component surface to produce the conversion layer, as outlined in the figure.
• the metallic support component which may be a component or semifinished product, which consists of an adhesion promoter or primer and a conversion layer preparing the adhesion primer for the primer.
• the first step in the preparation of the composite adhesion layer system is thus the chemical pretreatment of the
• Carrier component as a semi-finished or prefabricated an adhesion-promoting and
• the conversion layer is applied wet-chemically before application of the primer by dipping or spraying.
• green chromating can be used.
• Alodine ® 4595 from Henkel, Dusseldorf, Germany.
• the metallic carrier component is aluminum, ALFIPAS 731 from AluFinish, Andernach, Germany, can be used.
• the conversion layer offers not only an optimal liability reason for the
• Primer layer but also already forms a corrosion protection.
• the metallic support component Before the application of the conversion layer, the metallic support component is cleaned, degreased and - freed from the oxide skin - for example when using aluminum. After application rinsing and drying.
• the primer consists of a thermoplastic co-polyamide-based hot melt adhesive as sold by Evonik, Essen, Germany under the name VESTAMELT®.
• a particularly suitable hot melt adhesive from the VESTAMELT ® series is VESTAMELT ® X1333.
• the primer layer not only provides an excellent adhesion basis for the polymer structure to be sprayed on, especially if it consists of a polyamide, but also offers additional corrosion protection.
• the primer is applied as a powder coating and then subjected to a heat treatment.
• the grain size and layer thickness of the primer powder is adjusted according to further processing and end use.
• the powder-coated metallic carrier component becomes a temperature cycle in the heat treatment subjected to, wherein the used as a primer VESTAMELT ® powder binds by chemical reaction to the conversion layer.
• the metal overlay composite conversion and primer layer system allows for longer storage for about several weeks without adversely affecting reuse and adhesion.
• the metallic carrier component provided with this composite adhesion system is long-term stable and does not lose its functionality even after longer storage times.
• the metallic support member may be a shaped metallic one
• it can also be a metal semi-finished product such as a metal sheet or tube, which is subjected to further processing steps before the injection molding process for injection molding of the polymer structure takes place.
• a metal semi-finished product such as a metal sheet or tube
• Bonding layer system to a non-destructive forming, since it allows the case occurring with the bending of the metal semi-finished strain and join in.
• Adhesion function is also not adversely affected.
• a forming step of the metallic carrier component can, as shown in the figure, take place before a transport and / or a storage, to the same extent, however, the forming can also take place after a transport process or after a storage period.
• a semi-finished product which is in the form of a hollow profile, can finally before the
• Injection molding tool is performed.
• the injection molding process becomes the hybrid component formed, in which the molded plastic forms a close connection with the metallic carrier, which persists permanently even with greater mechanical stress after curing.
• the actual metal-hybrid production process is completed by the injection molding process.
• the finished or preformed or deformed component is inserted into a plastic injection molding cavity of an injection molding tool.
• This injection mold allows after closing a hydraulic molding of a metal semi-finished product with hollow profile by hydroforming.
• the composite adhesion layer does not hinder the hydroforming process and remains liable to adhesion.
• the polymer which is preferably a polyamide, injected under support pressure in the tube, thereby filling the actual injection mold and a connection of the polymer structure to the metal surface by the
• metal-plastic combination with light metal and polyamide plastics are preferred, and their material connection after the hydroforming - injection molding process, the vehicle requirements in terms of strength, rigidity and
• the metallic carrier component according to the invention which has the improved composite adhesion layer, it is possible to produce hybrid vehicle components cost-effectively with simultaneous weight reduction.
• vehicle components in the non-sight area such as the cockpit crossbeam or the front end carrier.
• the components produced by the method described can be used in vehicles as a structure, semi-structure and Monatagekomponenten. ⁇
• the inventive method makes it possible to fulfill the functions on the vehicle components over the period of use life of the vehicle by the metallic support member, which preferably consists of aluminum or magnesium in the course of lightweight construction, and both as a sheet metal, tube or diecast component Semi-finished may be processed into a durable plastic-metal hybrid component.
• the metallic support member which preferably consists of aluminum or magnesium in the course of lightweight construction, and both as a sheet metal, tube or diecast component Semi-finished may be processed into a durable plastic-metal hybrid component.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (2)

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Citations (1)

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• 2012
  • 2012-01-14 DE DE201210000658 patent/DE102012000658A1/de not_active Ceased
  • 2012-12-15 WO PCT/EP2012/005181 patent/WO2013104397A2/fr not_active Ceased

Patent Citations (1)

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