Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
  • B32B15/088—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyamides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
  • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
  • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
  • B32B37/182—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only one or more of the layers being plastic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/538—Roughness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2419/00—Buildings or parts thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2605/00—Vehicles
  • B32B2605/08—Cars

Definitions

• the invention relates to a metal-plastic sandwich panel with metallic
• the invention relates to a method for producing such a sandwich sheet.
• Lightweight construction is becoming increasingly important in vehicle construction, in particular in order to reduce the fuel consumption of vehicles or the emission of CO2.
• a known measure for weight reduction of vehicles is in
• the cover plates for example, each have a thickness in the range of 0.2 - 0.3 mm, while the plastic core layer is formed with a thickness from about 0.3 mm.
• Components made of this sandwich material almost reach the low weight of comparable aluminum sheets, but cost significantly less.
• this sandwich material is characterized by a very high bending and buckling rigidity.
• this sandwich material has the good forming properties of conventional steel sheets and shows no tendency for extreme deformations
• the cover sheets used for the sandwich material LITECOR ® are temper rolled before laminating with the plastic layer to adjust to the sheets a defined roughness.
• the roughness of the sheets is doing according to the Customer requests that result from the intended further processing of the sandwich material.
• the present invention was the object of a
• Sandwich panel of the type mentioned in the further improvement in terms of its further processing properties had the object of specifying a method with which corresponding metal-plastic sandwich panels can be reliably produced.
• the above object is achieved by a metal-plastic sandwich sheet having the features of
• the metal-plastic sandwich sheet according to the invention is characterized in that at least one of the two cover sheets is formed from a metal sheet whose surfaces have mutually different roughnesses, wherein the difference of the average roughness is at least 0.4 ⁇ , preferably at least 0.5 ⁇ .
• the present invention is based on the idea to produce the cover plates on their top and bottom (outer and inner surface) with different roughness, so that one free the respective optimum in terms of the customer for the
• Exterior surfaces of the sandwich material desired roughness and also can meet the optimum in terms of adhesion between the cover plate and plastic layer. Tests by the applicant have shown that very good thermoforming and anti-delamination properties can be achieved in the metal-plastic sandwich sheet according to the invention in particular if, according to a preferred embodiment, the respective side of the metal sheet has a mean roughness value in the range of 0.25-5 ⁇ , preferably in the range of 0.5 to 2.5 ⁇ .
• a relatively low average roughness adjusted to increase the adhesion between metal sheet and plastic layer whereas on the other side of the metal sheet, which is later turned away from the plastic layer , is set to the customer's request corresponding average roughness, which may be higher or possibly smaller than the average roughness of the plastic sheet to be joined to the side of the metal sheet.
• a relatively high roughness of the outside of the cover plate contributes to favorable thermoforming properties of the metal-plastic sandwich sheet.
• Cover sheet on the other hand, can be advantageous, for example, for meeting optical requirements, for example, in order to achieve the appearance of a high-quality paint surface in the outer skin of a vehicle or a building exterior cladding.
• An advantageous embodiment of the metal-plastic sandwich sheet according to the invention therefore provides that each of the cover plates on its side facing the plastic layer has a lower roughness than on its side facing away from the plastic layer.
• the two cover sheets can not only be made substantially the same but, if appropriate, also different from one another.
• a relatively high roughness can be set to small depressions for receiving a
• thermoforming lubricating oil or a primer while in the second cover plate on the side facing away from the lamination of the plastic layer, a relatively low roughness is set to meet eg optical requirements for the outer skin of a vehicle or a building exterior paneling.
• a further advantageous embodiment of the metal-plastic sandwich sheet according to the invention is characterized in that the plastic layer facing away from the outer sides of the cover sheets have mutually different roughness, wherein the difference of the average roughness of the outer sides of at least 0.4 ⁇ % preferably at least 0.5 ⁇ .
• a further embodiment of the metal-plastic sandwich panel according to the invention is characterized in that the side facing the plastics layer inner surfaces of the cover plates have mutually different roughness, wherein the difference of the average surface roughness of the inner surfaces of at least 0.4 ⁇ ⁇ ⁇ , preferably at least 0.5 ⁇ is.
• This refinement can be expedient in particular with regard to the production of the cover plates with roughnesses set according to the invention.
• a further advantageous embodiment of the metal-plastic sandwich panel according to the invention is that at least one of its cover sheets
• Dual phase steel is made. Dual phase steel is particularly suitable for
• At least one of the two cover sheets is made of a steel containing 0.8 to 2.9% by weight of Mn, 0.1 to 1.0% by weight of Si and 0.015 to 2.0% by weight of Al ,
• the steel of the cover sheet has the following chemical composition in mass fractions (% by weight) of the melt analysis:
• the cover sheet of the metal-plastic sandwich sheet according to the invention located outside in the finished component is preferably such that it has a tensile strength in the range from 480 to 1150 MPa. As a result, a high Beulfestmaschine the cover plate and thus the outer panel is achieved.
• the cover sheets may be provided with a metallic corrosion protection layer at least on their outer sides facing away from the plastic layer.
• the metal-plastic sandwich sheet according to the invention may also have at least one cover sheet of light metal, for example aluminum or magnesium. If the cover plate is made of aluminum, alloys of groups 5xxx and 6xxx, eg 5000 or 6000, are preferably used. On the other hand, if the cover plate is made of magnesium, it is preferable to use alloys of the groups AZ31 and above and AM 50.
• the plastic layer of the metal-plastic sandwich sheet according to the invention is preferably made of polyamide, polyethylene or a polyamide-polyethylene mixture.
• Polyethylene and polyamide are characterized by a particularly good
• the thickness of the plastic layer of the metal-plastic sandwich sheet according to the invention is preferably in the range of 0.1 to 0.8 mm, while the cover sheets each preferably have a thickness in the range of, for example, 0.1 to 0.5 mm.
• the method according to the invention comprises the steps:
• the plastic layer is activated directly, i.
• the activation takes place from the plastic surface side, whereby negative effects on the connection between the plastic layer and the metal layer (cover plate) are effectively prevented. In particular, this can significantly reduce the risk of delamination of the semi-finished products to be joined during joining or at a later time.
• Figure 1 is a schematic view of a skin-piercing apparatus for producing a metal sheet whose surfaces are different rough.
• Fig. 2 is a schematic view of a device for unilateral
• Fig. 3 is a schematic view of an apparatus for manufacturing
• Metal-plastic sandwich sheet according to the invention.
• a device for the tempering of a strip-shaped metal sheet 1 is shown.
• the metal sheet 1 is preferably steel sheet, the for example, has a thickness in the range of 0.1 to 0.5 mm.
• the apparatus comprises a roll stand with temper rolling rollers 2a, 2b, which define a rolling gap which is slightly smaller than the thickness of the strip 1 to be formed. By means of the temper rolling, a defined roughness structure is produced or set on the respective side of the metal strip 1.
• Each of the two temper rolling 2 a, 2 b has a specific surface structure for this purpose.
• 1 temper rolling rolls 2a, 2b having a different rough surface structure are used to coat the metal strip.
• the upper temper rolling roll 2a has a relatively smooth surface texture
• the lower temper rolling roll 2b has a relatively rough surface texture.
• FIGS. 1 a and 1 b in which surface sections of the skin pass rolls 2 a, 2 b are shown schematically on an enlarged scale, by dome-shaped or wart-shaped elevations 3 a, 3 b of different sizes.
• these relatively small elevations 3a, 3b may also have other shapes, for example I-shaped, double-I-shaped, H-shaped or X-shaped.
• 4a, 4b drive or deflection rollers are called.
• the temper rolling 2a, 2b are formed so that the rolled metal strip la surfaces 1 *, 1 ** having mutually different roughness, wherein the difference of the average roughness of the two strip surfaces at least 0.4 ⁇ , preferably at least 0.5 ⁇ .
• the metal strip 1 is preferably provided on one or both sides with a metallic corrosion protection layer.
• the coating of the metal strip 1 with a metallic corrosion protection layer can be done for example by hot dip coating or by electrolytic coating.
• the metal strip la After the ironing, the metal strip la, whose sides are 1 *, 1 ** set different roughness, wound into a coil and stored or transported directly to a device for one-sided application of a plastic layer lb.
• a device for one-sided application of a plastic layer lb Such a device is shown schematically in FIG.
• the dressed metal strip la is first pretreated in one or more processing stations prior to the one-sided application of the plastic layer lb.
• the tape la for example, initially degreased alkaline and / or cleaned in a processing station 6.
• the strip surface is passivated in one or more chemical pretreatment baths and thus prepared for coating.
• a processing station 8 can be provided for the single-sided application of a bonding agent or adhesive. After this pretreatment will be on the possibly with
• Adhesive or adhesive provided side 1 * of the tape la applied a plastic layer lb.
• the plastic layer 1b is made, for example, of polyamide, polyethylene or a mixture of these plastics. It can take the form of a
• prefabricated plastic film on the tape la are laminated.
• a press rolls 9a, 9b having laminating 9 can be used. At least one of the rollers 9a, 9b of the laminating device 9 may optionally be heated in order to increase the adhesion between the metal strip 1a and the plastic layer (plastic film) 1b.
• the thickness of the plastic layer 1b deposited on the metal strip is in the range of 0.1 to 0.8 mm.
• the plastic layer 1b can also be applied to the strip 1a by directly extruding plastic.
• the unilaterally coated tape la passes through a cooling and / or drying device 10. Thereafter, the tape is wound into a coil 11 and stored directly or to a device for applying a cover plate (metallic strip) 12a or a also coated on one side with a plastic layer 12b
• Cover plate (metallic band) 12 a further transported.
• Fig. 3 an apparatus for producing a metal-plastic sandwich sheet (sandwich composite) is shown.
• At least one of the two semifinished products, 12 or both semi-finished products, 12 is a metal strip coated on one side with plastic, preferably steel strip, as for example by means of the in FIGS Figures 1 and 2 shown devices can be produced.
• the two band-shaped semi-finished products 12, 12 are unwound from the respective unwinding reels 13, 14 and supplied to a pair of rollers 15, 16 in such a way that the two plastic layers 1b, 12b of the semi-finished products 12 face each other and lie against one another.
• the plastic layers 1b, 12b of both semi-finished products 12, 12 are produced from the plastic surface side
• the activation is effected by, for example, the heating of the metal layer, ie from the side of the metal layer, it can be achieved by activating the plastic layer from the plastic side or the plastic surface of the plastic-coated semi-finished products that only the activation the compound building plastic surface required energy is introduced. A stronger warming of the
• connection between metal and plastic can be effectively avoided.
• other activation media can be used by the immediate activation of the plastic surface, such as solvents or ozone.
• Particularly simple means for activating the plastic surface can be provided, for example, by means of a heat input causing means 17. These can by radiation and / or by convection the
• Plastic surface of at least one semi-finished product, but preferably both semi-finished products heat.
• emitters for example, LEDs, lasers, microwave radiators or infrared radiation sources can be used.
• Even a simple hot air blower can be used for heating the plastic surface and be adjusted very precisely with respect to the critical temperature.
• the critical temperature can be a maximum, for example, the melting temperature of the plastic of the plastic layer, since the plastic may lose its surface geometry during melting. However, it may also be sufficient to provide heating to a temperature in the region of the glass transition temperature during the activation of the plastic surface in order to later achieve bonding of the two plastic layers 1b, 12b between the roller pair 15, 16.
• the means 17 for activating the plastic surface preferably means for measuring the temperature of the plastic surface are integrated, so that the process can be very well controlled.
• the rollers 15, 16 In which defined by the rollers 15, 16
• FIG. 3 contains a schematic sectional view of the sandwich composite material at the moment in which the two plastic layers 1b, 12b touch.
• the plastic layers 1b, 12b they form a uniform plastic layer over the course of time, as shown in a next schematic sectional view of FIG. 3 of the composite material 18 after the material layers lb, 12b have been adhesively bonded.
• the two metallic cover sheets 1a, 12a preferably steel sheets, now enclose a single plastic layer 18b.
• the strength of the sandwich composite to be produced can be adjusted together with a selection of the sheet thickness in the stated range of 0.1 mm to 0.5 mm.
• high-strength steel grades in particular dual-phase steel for the metallic cover layers 1a, 12a of the sandwich composite material 18, a significant increase or a significant decrease in thickness can be achieved while maintaining the strength.
• two semi-finished products coated on one side with plastic, 12 according to FIG. 3 only one single side can also be provided with plastic
• coated semi-finished 1 'or 12 used and combined with a metal strip 12a and la, preferably steel strip to form a sandwich composite material. It is important that at least one of the two cover plates la, 12a of a
• Metal sheet is formed, whose surfaces have mutually different roughness, the difference of the average roughness is at least 0.4 ⁇ , preferably at least 0.5 ⁇ .
• each of the cover plates la, 12a preferably has on its the
• Plastic layer lb, 12b and 18b facing side lower roughness than on its the plastic layer lb, 12b and 18b opposite side. Furthermore, it is preferred that the outer sides of the cover plates 1a, 12a facing away from the plastic layer 1b, 12b or 18b have mutually different roughnesses, the difference between the average roughness values of the outer sides being at least 0.4 ⁇ m, preferably at least 0.5 ⁇ m.
• the sandwich composite produced in this way can then be used for transport or
• the tape-shaped cover sheets separately coated with adhesion promoter, wherein the applied adhesion promoter then dried. After that, the two are so coated
• Cover sheets brought together so that their adhesive coated sides are facing each other. The coated tapes are then in the

Landscapes

• Laminated Bodies (AREA)
• Metal Rolling (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51212823

Family Applications (1)

Country Status (5)

Families Citing this family (10)

Citations (1)

Family Cites Families (6)

• 2013
  • 2013-09-18 DE DE102013110282.4A patent/DE102013110282A1/de not_active Ceased
• 2014
  • 2014-07-15 EP EP14741840.4A patent/EP3046760A1/de not_active Withdrawn
  • 2014-07-15 WO PCT/EP2014/065142 patent/WO2015039782A1/de active Application Filing
  • 2014-07-15 JP JP2016543337A patent/JP6497710B2/ja not_active Expired - Fee Related
  • 2014-07-15 CN CN201480051303.4A patent/CN105555526A/zh active Pending

Patent Citations (1)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events